CA1270922A - Automatic pellet mill controller with steam temperature control - Google Patents
Automatic pellet mill controller with steam temperature controlInfo
- Publication number
- CA1270922A CA1270922A CA000532044A CA532044A CA1270922A CA 1270922 A CA1270922 A CA 1270922A CA 000532044 A CA000532044 A CA 000532044A CA 532044 A CA532044 A CA 532044A CA 1270922 A CA1270922 A CA 1270922A
- Authority
- CA
- Canada
- Prior art keywords
- temperature
- steam
- producing
- die
- pellet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/005—Control arrangements
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N17/00—Apparatus specially adapted for preparing animal feeding-stuffs
- A23N17/005—Apparatus specially adapted for preparing animal feeding-stuffs for shaping by moulding, extrusion, pressing, e.g. pellet-mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0005—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for briquetting presses
Abstract
AUTOMATIC PELLET MILL CONTROLLER
WITH STEAM TEMPERATURE CONTROL
Abstract of the Disclosure An automatic pellet mill controller con-trols a vapor steam generator for use with the pellet mill, the vapor steam generator having the capability of producing steam at a constant pressure but with a variable temperature to suit the particular ambient conditions, or formulation of feed being pelleted, or temperature at any point in the pellet mill. After the steam temperature is selected, the control can operate in any one of the various control modes which control the automatic pelleting of the pellet mill for the particular feed formulation.
WITH STEAM TEMPERATURE CONTROL
Abstract of the Disclosure An automatic pellet mill controller con-trols a vapor steam generator for use with the pellet mill, the vapor steam generator having the capability of producing steam at a constant pressure but with a variable temperature to suit the particular ambient conditions, or formulation of feed being pelleted, or temperature at any point in the pellet mill. After the steam temperature is selected, the control can operate in any one of the various control modes which control the automatic pelleting of the pellet mill for the particular feed formulation.
Description
PATENT
~ .
AUTOMATIC PELLET MILL CONTROLLER
: WITH STEAM TEMPERATURE CONTROL
. "
Background:and Summary of the Invention The inventor herein has previously designed and developed automatic controls for pellet mills which automatically control the process of converting dry mat~erial and various kinds ~f moisture includin~
: ~ steam,~water, and molaese or the like into pellets :::
-of homogenous composition as is desired in the feedindustry, and in other industries as well~ These automatic controllers are disclosed and claimed in his prior patents including U.S. Patent Nos. 3,932,736 issued January 13, 1976 to Zarrow, et ali 4,340,937 issued July 20, 1982 to Volk, Jr.; and 4,463,430, issued July 31, 1984 Volk, Jr. et al. Each of the devices disclosed provide still further developments and enhancements of the automatic control and improve upon or provide alternative control modes.
One of the factors which must be dealt with in automatically controlling a pellet mill i5 the relationship between temperature and moisture as evidenced by the addition of steam to the material to form a mash prior to its introduction into the mill where it i8 squeezed by a roller through a die to form the pell~t. As i5 known in the art, a pellet mill installation is generally in an environment with an uncontrolled temperature such that the material approaches ambient temperature which can vary with the seasons through a very significant temperature differential. The inventor's previously patented control systems minimize or eliminate the effects of ambient temperature by using a temperature differen-tial sen~ed across a portion of the pelleting appara-tus as the ~aterial traverses the apparatus. How-, 7C1~2 ever, as -the principal means of addiny -temper~ture in most installations is through the addition of steam, the addition of steam also adds moisture and in some formulations or ur.der some conditions moiæture May not be desired. Thus, in some installations the addition of dry heat is either desirable or necessary to achieve optimal pelleting, and this is typically accomplished through the use of a steam jacket which encloses a portion of the pellet apparatus and ele-vates the temperature of the material as it traversesthat portion of the apparatus through the radiation of heat from the side walls of the steam jacket. As is well known in the art, these steam jackets can be expensive, require maintenance, and are not the most efficient use of steam in that the heat transfer efficiency is low, the moisture content of the steam is lost, and its use increases the demand on a boiler system.
Recently, an improved steam generating sys-tem has been made commercially available which can convert water to steam on a continuous flow basis, and even more significantly, generate superheated steam at a constant pressure of between 4 to 6 PSI
and an adjustable temperature of between 194F to 600F. As the moisture content oE the ~team is ~ll~dC~Z~
directly related to the pressure, this device can provide a continuous supply of steam having a fixed moisture content but at a variable temperature. The typical boiler system of the prior art generates steam at a single tempera-ture and pressure, or varies the pressure at the same time that the temperature of the steam is changed, thereby altering the moisture content of the steam as the temperature of the steam is changed. With this new direct fired steam gener-ator, the heat content of the steam can be directlycontrolled by the automatic pellet mill controller which virtually eliminates the requirement for steam jackets or other sources of dry heat.
For example, in some control modes, it is desired to maintain the moisture content of the mate-rial in the pelleting apparatus to within a prescribed range. Assuming the rate of flow of dry material into the pellet mill can be determined and controlled, the rate of flow of moisture can be controlled accordin~ly by controlling the rate of flow of steam at a constant pressure of between 4 to 6 PSI with this new steam generator. However, as temperature also plays an important part in the pelletin~ process, with the same flow of material, and the same flow of moisture, a different steam temperature may be desired on cold winter days than that which is desired on hot summer days. Thus, the steam temperature could ideally be 7~9~
adjusted to account for these changes in ambient con-ditions. By way of further example, there are some formulations in which a greater temperature addition may be required or desired to achieve optimal pellet-ing. For these Eormuations, it may be desired to control the moisture content of the material, but it also may be desired to elevate the temperature over that which would ordinarily be provided by a stan~ard boiler system. For those formulations, it would be desirable for an operator to be able to dial in the desired steam temperature and to have the controller automatically control the moisture content of the material by controlling the rate of flow of steam.
In still another control mode, the amount of moisture added to the material can be controlled in response to either the temperature of the die it-self, or the difference in temperature between the die and the material at the spout of the mill. In these control modes, the steam temperature could be controlled in response to the temperature of the die or the temperature of the material at the spout. The present invention represents a significant improve-ment to the inventor's prior work in automatic pel-leting controls as it takes full advantage of the adjustability o~ steam temperature in the pelleting process as is available with this new steam generator.
z~
While the foregoing has been a brief des-cription of the principal advantages and features of the present invention, a fuller understanding thereof may be gained by referring to the drawings and des-cription of the preFerred embodiment which follows.
Brief Description of the Drawing Figure 1 is a diagramatic representation of a pellet mill with an improved control of the present invention; and Figure 2 is a partial cross sectional view taken along the plane of line 2-2 in Figure 1 and de-tailing the jacketed screened wall for introducing the steam into the conditioner.
Detailed ~escription of the Preferred Embodiment As shown in Figure 1, a typical pellet mill includes an input bin for dry feed 22 which feeds dry material through a screw feeder 24 driven by motor 26 through a chute or spout 28 into a vertical conditioner 30, vertical conditioner 30 having a ver-tically mounted drive shaft 32 with paddles 34 asdriven by drive motor 36. A mixing enclosure 38 sur-rounds the lower end of vertical conditioner 30 and has a screen 40 (a~ best shown in Figure 2) separat-ing the feed from an annular space into which steam is introduced from the vapor steam generator 42. As cnn be appreciated, once steam from steam genera-tor _~_ .{ .
~, 42 is introduced into mixing chamber 38 it mixes ~lith material and rises through the vertical conditioner 30, with access steam e~iting steam exhaust 44O An-other screw feeder 46 is driven by mo-tor 48 to trans-port the mixture of mash Erom the vertical condi~
tioner through chute 50 into the pellet mill 52.
The pellet mill controller 54 has connec-tions to a bin temperature sensor 56, a temperature sensor 58 which senses the temperature of the mate-rial prior to its entering vertical conditioner 30,temperature sensor 62 which senses the temperature of the mash mixture after exiting the vertical condi-tioner 30, and temperature sensor 64 which can be positioned to sense the temperature of the material after it is pelleted, or to sense the temperature of the die (not shown), or the pellets as they are im-mediately formed by the die, as shown in the parent application mentioned above. For purposes of clar-ity, only a single temperature sensor 64 is shown.
However, it is to be understood that a temperature sensor can be positioned as desired to sense the temperature of any of the above. In addition to temperature sensors, the control 54 has a bin level sensor 66 which senses the level of material in the bin 22, and feedback signals from tachometers 68, 70, and 72 to sense the speed of khe various motors posi-~ ,, . . . ~ . , ., : . .
tioned throughout the mill 20, all a3 known in theart. Steam flow can be contxolled through a valve 74, and ~he variable temperature of the steam can be controlled by controlling the vapor steam generator 42.
In operation, one or ~ore of the tempera~
ture sensors can be used by ~he control to set the tempera~re of steam which is desirably input into the pelleting apparatu~. Such an example may be an ambient ~emperature sensor, a dry material or bin temperature senqor, a temperature sensor at the spout of the mill, an operator input guch as would typi-cally be found on a face panel o a control, or the die temperature as sen~ed by a non contacting temper-ature ~ensor. Once the steam temperature is set, then the pellet mill control can control the pellet mill in any one or more of the control modes as is disclo~ed in any of the above identified prior ~atents.
There are various changes and modifications which may be made to the invention as would be ap-parent to those skilled in the art. ~owever, these changes or modi~ications axe included in the teaching of the disclosure, and it is intended that the inven-tion be limited only by the scope o~ the claims ap-pended hereto.
~ .
AUTOMATIC PELLET MILL CONTROLLER
: WITH STEAM TEMPERATURE CONTROL
. "
Background:and Summary of the Invention The inventor herein has previously designed and developed automatic controls for pellet mills which automatically control the process of converting dry mat~erial and various kinds ~f moisture includin~
: ~ steam,~water, and molaese or the like into pellets :::
-of homogenous composition as is desired in the feedindustry, and in other industries as well~ These automatic controllers are disclosed and claimed in his prior patents including U.S. Patent Nos. 3,932,736 issued January 13, 1976 to Zarrow, et ali 4,340,937 issued July 20, 1982 to Volk, Jr.; and 4,463,430, issued July 31, 1984 Volk, Jr. et al. Each of the devices disclosed provide still further developments and enhancements of the automatic control and improve upon or provide alternative control modes.
One of the factors which must be dealt with in automatically controlling a pellet mill i5 the relationship between temperature and moisture as evidenced by the addition of steam to the material to form a mash prior to its introduction into the mill where it i8 squeezed by a roller through a die to form the pell~t. As i5 known in the art, a pellet mill installation is generally in an environment with an uncontrolled temperature such that the material approaches ambient temperature which can vary with the seasons through a very significant temperature differential. The inventor's previously patented control systems minimize or eliminate the effects of ambient temperature by using a temperature differen-tial sen~ed across a portion of the pelleting appara-tus as the ~aterial traverses the apparatus. How-, 7C1~2 ever, as -the principal means of addiny -temper~ture in most installations is through the addition of steam, the addition of steam also adds moisture and in some formulations or ur.der some conditions moiæture May not be desired. Thus, in some installations the addition of dry heat is either desirable or necessary to achieve optimal pelleting, and this is typically accomplished through the use of a steam jacket which encloses a portion of the pellet apparatus and ele-vates the temperature of the material as it traversesthat portion of the apparatus through the radiation of heat from the side walls of the steam jacket. As is well known in the art, these steam jackets can be expensive, require maintenance, and are not the most efficient use of steam in that the heat transfer efficiency is low, the moisture content of the steam is lost, and its use increases the demand on a boiler system.
Recently, an improved steam generating sys-tem has been made commercially available which can convert water to steam on a continuous flow basis, and even more significantly, generate superheated steam at a constant pressure of between 4 to 6 PSI
and an adjustable temperature of between 194F to 600F. As the moisture content oE the ~team is ~ll~dC~Z~
directly related to the pressure, this device can provide a continuous supply of steam having a fixed moisture content but at a variable temperature. The typical boiler system of the prior art generates steam at a single tempera-ture and pressure, or varies the pressure at the same time that the temperature of the steam is changed, thereby altering the moisture content of the steam as the temperature of the steam is changed. With this new direct fired steam gener-ator, the heat content of the steam can be directlycontrolled by the automatic pellet mill controller which virtually eliminates the requirement for steam jackets or other sources of dry heat.
For example, in some control modes, it is desired to maintain the moisture content of the mate-rial in the pelleting apparatus to within a prescribed range. Assuming the rate of flow of dry material into the pellet mill can be determined and controlled, the rate of flow of moisture can be controlled accordin~ly by controlling the rate of flow of steam at a constant pressure of between 4 to 6 PSI with this new steam generator. However, as temperature also plays an important part in the pelletin~ process, with the same flow of material, and the same flow of moisture, a different steam temperature may be desired on cold winter days than that which is desired on hot summer days. Thus, the steam temperature could ideally be 7~9~
adjusted to account for these changes in ambient con-ditions. By way of further example, there are some formulations in which a greater temperature addition may be required or desired to achieve optimal pellet-ing. For these Eormuations, it may be desired to control the moisture content of the material, but it also may be desired to elevate the temperature over that which would ordinarily be provided by a stan~ard boiler system. For those formulations, it would be desirable for an operator to be able to dial in the desired steam temperature and to have the controller automatically control the moisture content of the material by controlling the rate of flow of steam.
In still another control mode, the amount of moisture added to the material can be controlled in response to either the temperature of the die it-self, or the difference in temperature between the die and the material at the spout of the mill. In these control modes, the steam temperature could be controlled in response to the temperature of the die or the temperature of the material at the spout. The present invention represents a significant improve-ment to the inventor's prior work in automatic pel-leting controls as it takes full advantage of the adjustability o~ steam temperature in the pelleting process as is available with this new steam generator.
z~
While the foregoing has been a brief des-cription of the principal advantages and features of the present invention, a fuller understanding thereof may be gained by referring to the drawings and des-cription of the preFerred embodiment which follows.
Brief Description of the Drawing Figure 1 is a diagramatic representation of a pellet mill with an improved control of the present invention; and Figure 2 is a partial cross sectional view taken along the plane of line 2-2 in Figure 1 and de-tailing the jacketed screened wall for introducing the steam into the conditioner.
Detailed ~escription of the Preferred Embodiment As shown in Figure 1, a typical pellet mill includes an input bin for dry feed 22 which feeds dry material through a screw feeder 24 driven by motor 26 through a chute or spout 28 into a vertical conditioner 30, vertical conditioner 30 having a ver-tically mounted drive shaft 32 with paddles 34 asdriven by drive motor 36. A mixing enclosure 38 sur-rounds the lower end of vertical conditioner 30 and has a screen 40 (a~ best shown in Figure 2) separat-ing the feed from an annular space into which steam is introduced from the vapor steam generator 42. As cnn be appreciated, once steam from steam genera-tor _~_ .{ .
~, 42 is introduced into mixing chamber 38 it mixes ~lith material and rises through the vertical conditioner 30, with access steam e~iting steam exhaust 44O An-other screw feeder 46 is driven by mo-tor 48 to trans-port the mixture of mash Erom the vertical condi~
tioner through chute 50 into the pellet mill 52.
The pellet mill controller 54 has connec-tions to a bin temperature sensor 56, a temperature sensor 58 which senses the temperature of the mate-rial prior to its entering vertical conditioner 30,temperature sensor 62 which senses the temperature of the mash mixture after exiting the vertical condi-tioner 30, and temperature sensor 64 which can be positioned to sense the temperature of the material after it is pelleted, or to sense the temperature of the die (not shown), or the pellets as they are im-mediately formed by the die, as shown in the parent application mentioned above. For purposes of clar-ity, only a single temperature sensor 64 is shown.
However, it is to be understood that a temperature sensor can be positioned as desired to sense the temperature of any of the above. In addition to temperature sensors, the control 54 has a bin level sensor 66 which senses the level of material in the bin 22, and feedback signals from tachometers 68, 70, and 72 to sense the speed of khe various motors posi-~ ,, . . . ~ . , ., : . .
tioned throughout the mill 20, all a3 known in theart. Steam flow can be contxolled through a valve 74, and ~he variable temperature of the steam can be controlled by controlling the vapor steam generator 42.
In operation, one or ~ore of the tempera~
ture sensors can be used by ~he control to set the tempera~re of steam which is desirably input into the pelleting apparatu~. Such an example may be an ambient ~emperature sensor, a dry material or bin temperature senqor, a temperature sensor at the spout of the mill, an operator input guch as would typi-cally be found on a face panel o a control, or the die temperature as sen~ed by a non contacting temper-ature ~ensor. Once the steam temperature is set, then the pellet mill control can control the pellet mill in any one or more of the control modes as is disclo~ed in any of the above identified prior ~atents.
There are various changes and modifications which may be made to the invention as would be ap-parent to those skilled in the art. ~owever, these changes or modi~ications axe included in the teaching of the disclosure, and it is intended that the inven-tion be limited only by the scope o~ the claims ap-pended hereto.
Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1.
An automatic control system for a pelleting apparatus, the apparatus including a pellet producing means, means for feeding a supply of material to the producing means, means for producing a supply of steam, said steam producing means including means to adjust the superheated temperature of the steam, and means for feeding said steam to the producing means, the control system including means to control the steam producing means to select a desired superheated temperature of the steam.
2.
The system of Claim 1 further comprising a first means for sensing the temperature of a pre-determined parameter and wherein the steam producing control means includes means to adjust the steam temperature in response to the first temperature sensing means.
3.
The system of Claim 2 wherein the steam producing means has means to adjust the superheated temperature of the steam without changing the mois-ture content of the steam.
4.
The system of Claim 3 wherein the control system further comprises means to control the mois-ture content of the material at the producing means to within a prescribed range.
5.
The system of Claim 3 wherein the pellet producing means includes a die, the first temperature sensing means having means to sense the temperature of the die.
6.
The system of Claim 3 further comprising a plurality of temperature sensing means for sensing the temperature of the material at a plurality of locations in the pelleting apparatus, and means to control the input of at least the steam in response to at least two of said temperature sensing means.
7.
The system of Claim 6 wherein said at least two temperature sensing means are located at the input and output of the pellet producing means.
8.
The system of Claim 6 wherein the pelleting apparatus further comprises means to mix the material and steam, said at least two temperature sensing means being located at the input and output of said mixing means.
9.
The system of Claim 6 wherein the pellet producing means includes a die, said at least two temperature sensing means having means to sense the temperature of the material prior to entering the pellet producing means and the temperature of the die.
10.
The system of Claim 3 wherein the pellet producing means includes a die, said die having means to form pellets, and further comprising means to sense the temperature of the die, and means to con-trol the input of at least the steam in response to said die temperature sensing means.
11.
The system of Claim 3 wherein the pellet producing means includes a die, said die having means to form pellets, and further comprising means to sense the temperature of the pellets immediately as they are formed by the die, and means to control the input of at least the steam in response to the pellet temperature sensing means.
12.
The system of Claim 6 further comprising means to select said at least two temperature sensing means from the plurality of said temperature sensing means.
13.
An automatic control system for a pelleting apparatus, the apparatus including a pellet producing means, means for feeding a supply of material to the producing means, means for producing a supply of steam, said steam producing means including means to adjust the superheated temperature of the steam, and means for feeding said steam to the producing means, the control system including means for sensing the ambient temperature, and means to control the steam producing means at least partially in response to said ambient temperature sensing means.
14.
The system of Claim 13 wherein the steam producing control means includes means to adjust the steam temperature in response to the ambient tempera-ture sensing means.
15.
The system of Claim 14 wherein the steam producing means has means to adjust the superheated temperature of the steam without changing the mois-ture content of the steam.
16.
The system of Claim 15 wherein the control system further comprises means to control the mois-ture content of the material at the producing means to within a prescribed range.
17.
The system of Claim 15 further comprising a plurality of temperature sensing means for sensing the temperature of the material at a plurality of locations in the pelleting apparatus, and means to control the input of at least the steam in response to at least two of said temperature sensing means.
18.
An automatic control system for a pelleting apparatus, the pelleting apparatus including a pellet producing means, means for feeding a supply of mate-rial to the producing means, means for feeding a sup-ply of moisture to the producing means including means to produce a supply of steam, said steam producing means having means to adjust the heat content of the steam without changing the moisture content, the con-trol means including means to determine the desired amount of moisture to be added to the mixture, means to determine the desired amount of heat to be added to the mixture, and means to control the moisture supply means to add the desired amounts of heat and moisture to the material.
19.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means.
20.
The system of Claim 19 wherein the means to determine the desired moisture comprises means to sense a temperature differential of the material as it traverses the pelleting apparatus.
21.
The system of Claim 20 wherein the tempera-ture differential is taken across the pellet produc-ing means.
22.
The system of Claim 20 wherein the produc-ing means includes means to mix the moisture and material, and wherein the temperature differential is taken across the mixing means.
23.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means, said temperature sensing means having means to sense the temperature of the material.
24.
The system of Claim 23 wherein the tempera-ture sensing means senses the temperature of the material prior to being fed to the pellet producing means.
25.
The system of Claim 18 wherein the control means has means to permit operator selection of the desired amount of heat.
26.
The system of Claim 18 wherein the means to determine the desired amount of moisture comprises at least one temperature sensing means.
27.
The system of Claim 18 wherein the pellet producing means further comprises a die, said die having means to form pellets, and further comprising means to sense the temperature of the die, the mois-ture determining means being at least partially re-sponsive to the die temperature sensing means.
28.
The system of Claim 18 wherein the pellet producing means further comprises a die, said die having means to form pellets, and further comprising means to sense the temperature of the pellets immedi-ately as they are formed by the die, the moisture determining means being at least partially responsive to the pellet temperature sensing means.
29.
The system of Claim 18 wherein the pellet producing means includes a die, and means to mix the material and moisture, and wherein the control fur-ther comprises means to sense the temperature of the material prior to entering the die and means to sense the temperature of the die, the moisture determining means being at least partially responsive to the dif-ference in temperature as sensed by the two tempera-ture sensing means, and the heat determining means being at least partially responsive to the die tem-perature.
30.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means for sensing the temperature of the material prior to being fed to the pellet producing means, and wherein the means to determine the desired moisture comprises means to sense the temperature differential of the material as it traverses the pellet producing means.
1.
An automatic control system for a pelleting apparatus, the apparatus including a pellet producing means, means for feeding a supply of material to the producing means, means for producing a supply of steam, said steam producing means including means to adjust the superheated temperature of the steam, and means for feeding said steam to the producing means, the control system including means to control the steam producing means to select a desired superheated temperature of the steam.
2.
The system of Claim 1 further comprising a first means for sensing the temperature of a pre-determined parameter and wherein the steam producing control means includes means to adjust the steam temperature in response to the first temperature sensing means.
3.
The system of Claim 2 wherein the steam producing means has means to adjust the superheated temperature of the steam without changing the mois-ture content of the steam.
4.
The system of Claim 3 wherein the control system further comprises means to control the mois-ture content of the material at the producing means to within a prescribed range.
5.
The system of Claim 3 wherein the pellet producing means includes a die, the first temperature sensing means having means to sense the temperature of the die.
6.
The system of Claim 3 further comprising a plurality of temperature sensing means for sensing the temperature of the material at a plurality of locations in the pelleting apparatus, and means to control the input of at least the steam in response to at least two of said temperature sensing means.
7.
The system of Claim 6 wherein said at least two temperature sensing means are located at the input and output of the pellet producing means.
8.
The system of Claim 6 wherein the pelleting apparatus further comprises means to mix the material and steam, said at least two temperature sensing means being located at the input and output of said mixing means.
9.
The system of Claim 6 wherein the pellet producing means includes a die, said at least two temperature sensing means having means to sense the temperature of the material prior to entering the pellet producing means and the temperature of the die.
10.
The system of Claim 3 wherein the pellet producing means includes a die, said die having means to form pellets, and further comprising means to sense the temperature of the die, and means to con-trol the input of at least the steam in response to said die temperature sensing means.
11.
The system of Claim 3 wherein the pellet producing means includes a die, said die having means to form pellets, and further comprising means to sense the temperature of the pellets immediately as they are formed by the die, and means to control the input of at least the steam in response to the pellet temperature sensing means.
12.
The system of Claim 6 further comprising means to select said at least two temperature sensing means from the plurality of said temperature sensing means.
13.
An automatic control system for a pelleting apparatus, the apparatus including a pellet producing means, means for feeding a supply of material to the producing means, means for producing a supply of steam, said steam producing means including means to adjust the superheated temperature of the steam, and means for feeding said steam to the producing means, the control system including means for sensing the ambient temperature, and means to control the steam producing means at least partially in response to said ambient temperature sensing means.
14.
The system of Claim 13 wherein the steam producing control means includes means to adjust the steam temperature in response to the ambient tempera-ture sensing means.
15.
The system of Claim 14 wherein the steam producing means has means to adjust the superheated temperature of the steam without changing the mois-ture content of the steam.
16.
The system of Claim 15 wherein the control system further comprises means to control the mois-ture content of the material at the producing means to within a prescribed range.
17.
The system of Claim 15 further comprising a plurality of temperature sensing means for sensing the temperature of the material at a plurality of locations in the pelleting apparatus, and means to control the input of at least the steam in response to at least two of said temperature sensing means.
18.
An automatic control system for a pelleting apparatus, the pelleting apparatus including a pellet producing means, means for feeding a supply of mate-rial to the producing means, means for feeding a sup-ply of moisture to the producing means including means to produce a supply of steam, said steam producing means having means to adjust the heat content of the steam without changing the moisture content, the con-trol means including means to determine the desired amount of moisture to be added to the mixture, means to determine the desired amount of heat to be added to the mixture, and means to control the moisture supply means to add the desired amounts of heat and moisture to the material.
19.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means.
20.
The system of Claim 19 wherein the means to determine the desired moisture comprises means to sense a temperature differential of the material as it traverses the pelleting apparatus.
21.
The system of Claim 20 wherein the tempera-ture differential is taken across the pellet produc-ing means.
22.
The system of Claim 20 wherein the produc-ing means includes means to mix the moisture and material, and wherein the temperature differential is taken across the mixing means.
23.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means, said temperature sensing means having means to sense the temperature of the material.
24.
The system of Claim 23 wherein the tempera-ture sensing means senses the temperature of the material prior to being fed to the pellet producing means.
25.
The system of Claim 18 wherein the control means has means to permit operator selection of the desired amount of heat.
26.
The system of Claim 18 wherein the means to determine the desired amount of moisture comprises at least one temperature sensing means.
27.
The system of Claim 18 wherein the pellet producing means further comprises a die, said die having means to form pellets, and further comprising means to sense the temperature of the die, the mois-ture determining means being at least partially re-sponsive to the die temperature sensing means.
28.
The system of Claim 18 wherein the pellet producing means further comprises a die, said die having means to form pellets, and further comprising means to sense the temperature of the pellets immedi-ately as they are formed by the die, the moisture determining means being at least partially responsive to the pellet temperature sensing means.
29.
The system of Claim 18 wherein the pellet producing means includes a die, and means to mix the material and moisture, and wherein the control fur-ther comprises means to sense the temperature of the material prior to entering the die and means to sense the temperature of the die, the moisture determining means being at least partially responsive to the dif-ference in temperature as sensed by the two tempera-ture sensing means, and the heat determining means being at least partially responsive to the die tem-perature.
30.
The system of Claim 18 wherein the means to determine the desired heat comprises a temperature sensing means for sensing the temperature of the material prior to being fed to the pellet producing means, and wherein the means to determine the desired moisture comprises means to sense the temperature differential of the material as it traverses the pellet producing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA532044A CA1270922C (en) | 1986-04-04 | 1987-03-13 | Automatic pellet mill controller with steam temperature control |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/848,219 US4700310A (en) | 1985-12-24 | 1986-04-04 | Automatic pellet mill controller with steam temperature control |
| US06/848,219 | 1986-04-04 | ||
| CA532044A CA1270922C (en) | 1986-04-04 | 1987-03-13 | Automatic pellet mill controller with steam temperature control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA1270922A true CA1270922A (en) | 1990-06-26 |
| CA1270922C CA1270922C (en) | 1990-06-26 |
Family
ID=25302692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA532044A Expired CA1270922C (en) | 1986-04-04 | 1987-03-13 | Automatic pellet mill controller with steam temperature control |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4700310A (en) |
| EP (1) | EP0240267A3 (en) |
| AU (1) | AU7072887A (en) |
| CA (1) | CA1270922C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4751030A (en) * | 1986-11-20 | 1988-06-14 | Beta Raven Inc. | Pellet mill controller with automatic differential temperature selection |
| US4882105A (en) * | 1987-11-09 | 1989-11-21 | Beta Raven Inc. | Method of automatically controlling an extruder |
| US4935874A (en) * | 1988-01-26 | 1990-06-19 | Beta Raven Inc. | Method and apparatus for controlling steam in a pellet mill |
| US4929163A (en) * | 1988-03-28 | 1990-05-29 | Beta Raven, Inc. | Apparatus for a pellet mill without steam addition |
| US5021940A (en) * | 1989-01-12 | 1991-06-04 | Automatic Control Electronics Company | Synergetic automatic control system for pellet mill |
| DK162541C (en) * | 1989-11-27 | 1992-03-30 | Danstoker As | ELECTRIC STEAM DRIVERS AND / OR CONDITIONS. |
| US5928678A (en) * | 1990-08-31 | 1999-07-27 | Agp, L.P. | Mash feed conditioning apparatus |
| JP2919166B2 (en) * | 1992-02-28 | 1999-07-12 | 日本電気コンピュータシステム株式会社 | Automatic control system of raw material input amount to rolling granulator |
| US5194275A (en) * | 1992-08-13 | 1993-03-16 | Agrichem, Inc. | Grain processing apparatus |
| US5402352A (en) * | 1993-02-22 | 1995-03-28 | Beta Raven, Inc. | Pellet mill controller with automatic setting of start values |
| ES2170098T3 (en) * | 1993-05-06 | 2002-08-01 | Riyate Pty Ltd | TREATMENT OF FIBROSO RIBS AND MATERIALS. |
| CN1188269C (en) * | 1993-06-02 | 2005-02-09 | 比勒公司 | Worm extruder |
| US5744186A (en) * | 1996-12-05 | 1998-04-28 | Pelleting Concepts International, Inc. | Method for preparing animal food pellets |
| CN108294346B (en) * | 2018-02-01 | 2021-01-19 | 李平 | Stirring type feed soaking device for animal husbandry |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3978244A (en) * | 1970-10-02 | 1976-08-31 | The Griffith Laboratories, Inc. | Puffed proteinaceous food products and methods of producing same |
| US3932736A (en) * | 1974-04-08 | 1976-01-13 | Beta Corporation Of St. Louis | Automatic pellet producing system |
| US4022915A (en) * | 1976-06-28 | 1977-05-10 | National Can Corporation | Intermediate moisture food product and method of preparing the same |
| JPS536448A (en) * | 1976-07-05 | 1978-01-20 | Meiji Seika Co | Deodorizing method of texturized soy bean protein |
| US4119742A (en) * | 1976-10-22 | 1978-10-10 | Beatrice Foods Co. | Reconstituted fried puffed pork skins |
| US4288978A (en) * | 1978-05-19 | 1981-09-15 | Vapor Energy, Inc. | Vapor generator |
| US4211071A (en) * | 1978-05-19 | 1980-07-08 | Vapor Energy, Inc. | Vapor generators |
| US4340937A (en) * | 1980-04-14 | 1982-07-20 | Beta Corporation Of St. Louis | Automatic control for a pellet producing apparatus |
| JPS57105233A (en) * | 1980-12-23 | 1982-06-30 | Hitachi Ltd | Granulating apparatus |
| US4441460A (en) * | 1981-05-08 | 1984-04-10 | Vapor Energy, Inc. | Apparatus for heating and utilizing fluids |
| US4337619A (en) * | 1981-05-08 | 1982-07-06 | Vapor Energy, Inc. | Hot water system |
| US4463430A (en) * | 1981-08-31 | 1984-07-31 | Beta Corporation | Microprocessor based pellet mill control |
| US4418651A (en) * | 1982-07-02 | 1983-12-06 | Vapor Energy, Inc. | System for heating and utilizing fluids |
| DE3316349A1 (en) * | 1983-05-05 | 1984-11-08 | Hertenstein, Roland R., 7630 Lahr | Process and apparatus for hot pressing of moulded pieces, in particular feedstuff pellets |
-
1986
- 1986-04-04 US US06/848,219 patent/US4700310A/en not_active Expired - Fee Related
-
1987
- 1987-03-13 CA CA532044A patent/CA1270922C/en not_active Expired
- 1987-03-27 EP EP87302679A patent/EP0240267A3/en not_active Withdrawn
- 1987-03-27 AU AU70728/87A patent/AU7072887A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU7072887A (en) | 1987-10-08 |
| US4700310A (en) | 1987-10-13 |
| EP0240267A3 (en) | 1988-11-02 |
| CA1270922C (en) | 1990-06-26 |
| EP0240267A2 (en) | 1987-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 19921228 |