Feed grain conditioning apparatus

Abstract: This invention is an apparatus and method for automatically adjusting the moisture content of feed grains (11) to a relatively constant target level. As the grain (11) is transported into, or within the feed manufacturing process, a sample is diverted through a continuous flow moisture sensor (23). The sensor (23) generates an electronic signal proportional to the moisture content of the grain (11). This signal is used to control the application rate of a surfactant - water mixture, or of water alone. The water may be either in the form of steam or, as a hot or cold liquid. The grain (11) then enters a mixing or contact chamber (15), into which the water is metered at a rate that is proportional to the moisture content of the incoming grain (11). The treated grain will have a relatively constant moisture content, eliminating one of the largest variables in the manufacturing of livestock feeds.

Description: Moisture content of feed grains is critically important to the quality and palatibility of the finished feed. It also has a significant impact on the ease with which they are processed into feed, but has been largely uncontrollable variable in the feed manufacturing process. Moisture levels encountered typically range between eight and sixteen percent in stored grain. New crop grain can have moisture levels in excess of twenty percent. A feed manufacturing facility will commonly process several hundreds of tons of feed grains each day that have been purchased from many sources. Within a matter of minutes the moisture content of the grain being processed can vary several percentage points. Without regulated moisture addition, a highly variable feed product is produced. The processing of feed grains in the manufacturing of finished livestock feeds is intended to increase the feed value of the grains. "Value" is defined in terms of palatibility and digestibility. The most simple processing involves either the grinding or dry rolling of the whole kernel grain to fracture the seed coat and to increase the surface area of the grain particles for more efficient digestion. Grain moisture content greatly affects the texture of the final products produced by these dry methods. Very dry grain will tend to make flour, which the animals will not eat, rather than the desired larger particle. This flour, or dust, represents a safety hazard in the feed manufacturing facility, both from the explosion potential and from workers breathing it. It also represents a loss of inventory to the feed manufacturer. Careful control of the moisture level of the grain entering these dry processes can eliminate dust and help to produce a uniform particle size that will improve digestion without being so small as to depress consumption. Swine and beef cattle feeds are commonly prepared with dry processed grain. A more sophisticated method of processing feed grains involves cooking them with steam before they are passed through a roller mill. The cooking partially gelatinizes the starch in the grain, increasing its digestibility. The rolling increases surface area of the grain kernel by pressing it into a flat "flake". Beef and dairy cattle feeds are commonly steam flaked. Whole kernel grain flows through a chamber into which live steam is injected. Once "cooked", it passes through a roller mill, producing a "flake". If the grain is too dry, the cooking or gelatinizing will be incomplete, since the gelatinizing process requires both heat and moisture. The grain kernel will be hard and require more energy to roll than a moist, properly cooked kernel. The final flake will be dry and brittle. Subsequent handling of the flake will cause it to break, resulting in "fines" that the animal will not eat readily. A second processing method involving steam cooking of the grain is pelleting, which is commonly used to prepare poultry feeds. The grain is ground to a uniform texture, mixed with other feed ingredients and treated with steam. The resulting mash is extruded through a die in a pellet mill. As with steam flaking, gelatinization and toughness of the final feed form, are greatly influenced by the moisture content of the grains being processed. The power required to drive the pellet mill is also affected by the moisture content of the mash. If it is too dry, more power will be required to extrude the pellet, the cooking will be incomplete and the feed ingredients will not bond well, causing a weak pellet that falls apart. Broken pellets become "fines" that are not eaten and represent a loss to the livestock producer. An example of a known pellet producing system is shown in US-A-3 932 736. The object of the invention is to provide an improved feed grain conditioning apparatus and method which does not suffer from the drawbacks of such known apparatus and method. This object is achieved according to one aspect of the invention by a feed grain conditioning apparatus for conditioning of feed grain to bring the moisture content to an approximate target moisture content through the addition of moisture derived at least in part from a water supply, as the feed grain moves in a downstream direction from a first location toward a second location, comprising: grain conveying means for moving the grain in said downstream direction, having a sensing station and a wetting station located downstream of the sensing station; a moisture sensor of the type to continuously monitor moisture content of grain and convert the measurement into an electronic signal, positioned at the sensing station located to intercept a sample of passing feed grain for substantially continuous measurement of the moisture content of the sample and translation of the measurement into an electronic signal; liquid applicator means located at the wetting station positioned to disperse liquid derived at least in part from a water supply line upon passing feed grain; a liquid supply line connected to the liquid applicator means and for connection to the water supply line; an automatic water valve connected in the water supply line having an electronically actuated valve control moveable between open and closed positions to regulate the amount of water flow to the liquid applicator means for application to passing feed grain; means connecting the moisture sensor to the electronically operated valve control of the automatic water valve (44) so that the valve control operates responsive to the electronic signal generated by the moisture sensor according to the difference between the moisture content of the grain sample as sensed by the moisture sensor and the target moisture content, said connecting means including calibrated means connected between the moisture sensor and said valve control for regulation of the automatic water valve by the signal from the moisture sensor calibrated according to a known moisture content of the type of feed grain to be conditioned; characterized by an additive supply container for containing liquid additive for mixture with the water for application to the feed grain, a chemical metering pump connected to the additive supply container, an additive supply line connected between the chemical metering pump and the liquid supply line to supply an additive in regulated amounts proportionate to the volumetric flow of liquid to the liquid supply line for mixing with the water preparatory to application to the feed grain, and by said conveying means including an auger assembly of the type having an auger housing and an auger located in the auger housing for movement of the grain along at least a portion of the path between said first and second locations, said liquid applicator means located at said wetting station mounted on the auger housing applying moisture in the auger housing to the passing grain. According to another aspect of the invention this object is achieved by a method of conditioning a type of feed grain as it is moved downstream from an first location along a path toward a second location, through regulated addition of moisture derived at least in part from a water supply, in order to increase the moisture content of the feed grain to bring it to an approximate target moisture content, comprising the steps of: measuring the moisture content of a sample of the moving grain at a sensing station on the path of travel of the grain, using a moisture sensor of the type to substantially continuously monitor the moisture content of moving grain and translate the measurement into a substantially continuously generated electronic signal; providing moisture to the passing grain using a liquid applicator means at a wetting station located downstream of the sensing station with respect to the direction of grain movement; providing liquid to the liquid applicator means through a liquid supply line extended from a water supply line; providing an automatic water valve in the water supply line of the type having an electronic valve control for regulating the opening and closing of the valve to regulate water flow through the valve by an electronic signal; and controlling the automatic water valve with the electronic signal generated by the moisture sensor to modulate the flow of water to the liquid applicator means according to the moisture content of the grain sample sensed by the moisture sensor; characterized by introducing a liquid additive into the liquid supply line in an amount proportionate to the volumetric flow of water in the liquid supply line; providing an auger assembly of the type having an auger housing and an auger located in the auger housing for movement of the grain along at least a portion of the path of movement of the grain from the first location toward the second location, and applying moisture in the auger housing to the passing grain at said wetting station by said liquid applicator means mounted on the auger housing. Advantageous embodiments of the invention are disclosed in the dependent claims. The apparatus and method of the invention continuously, on-line monitor moisture content and precisely calibrate adjustment of the moisture content of feed grains being used to manufacture livestock feeds. A continuous flow moisture sensor that is positioned to receive and measure the moisture content of a sample of passing feed grains is used to generate an electronic signal indicative of the grain moisture content as the grain flows through the sampling site. A moisture application apparatus is provided for regulated addition of moisture to the feed grain and receives the electronic signal generated by the moisture sensor. This signal is used as a control signal to adjust moisture addition rate necessary to bring the grain moisture to an optimum level for processing. The added moisture may be in the form of steam, hot or cold water, or a water-surfactant mixture, and is metered and added to the feed grain in a mixing chamber such as an auger housing where the water mixture is thoroughly mixed with the grain. The invention will now be described by way of example with reference to the accompanying drawings, wherein: Fig. 1 is a schematic view of the grain moisturizing apparatus of the invention partly fragmented for purposes of illustration; Fig. 2 is an enlarged schematic view of the control station of the grain moisturizing appartus of Fig. 1. DISCRIPTION OF A PREFERRED EMBODIMENT Referring to the drawings, there is shown in Fig. 1 the grain moisturizing apparatus of the invention indicated generally at 10 positioned to intercept flowing feed grain 11 for conditioning it through the addition of water either alone or mixed with a fluid additive such as a nutrient, a surfactant or a flavoring agent. Grain 11 is feed grain such as milo, corn, oats, barley or wheat, that has a relatively low initial moisture content. The purpose of the addition of the wetting agent is to bring the moisture content up to a uniform target level, for example, 18 - 18.5 per cent, so as to be more palatable to the animal and more readily digested by the animal, yet not to exceed that desired moisture level. The grain as introduced to apparatus 10 will be of varying moisture content. Grain that has been in storage will have a relatively low moisture content, while grain more freshly harvested will usually be somewhat higher. Apparatus 10 continuously senses and monitors the moisture content of the passing grain and adjusts the amount of wetting agent and moisture added. Grain 11 is flowing from a location of origin such as a storage bin, an elevator or a grain truck, and is travelling or flowing usually in a downstream direction of travel to a destination such as a surge bin, roller mill, steam chamber, a feed mixer or the like, preparatory to being fed to livestock. The grain flow is directed through the moisturizing apparatus 10 for conditioning. The grain travels past a sensing station 12 where a sample is diverted through a moisture sensor. Sensing station 12 is located upstream of the grain flow with respect to a wetting station 14. The grain is transferred from the sensing station 12 to and beyond the wetting station 14 by a mixing and transfer apparatus 15. In the mixing and transfer apparatus 15 grain is not only moved along to the destination location, but the wetting agent is thoroughly mixed into the grain. Sensing station 12 includes a sensor mounting box or housing 16. The outlet end of a grain conveyor or pipe 18 connects to the inlet end of housing 16 for transfer of the entire amount of flowing grain through the interior of housing 16. The lower or outlet end of housing 16 has a downwardly divergent, truncated conical outlet section 19 assembled by a flanged connection 20 to an auger housing 22 forming a part of the mixing and transfer apparatus 15. The grain 11 having a measurable moisture content flows from the origin location through the grain conduit pipe 18, then through the interior of sensor mounting housing 16 to the interior of auger housing 22. A moisture sensor 23 is installed within the interior of the sensor housing 16 in blocking relationship to a portion of the passageway of the grain 11 as it travels toward the auger housing 22. Moisture sensor 23 has an inlet opening 24 perpendicular to the longitudinal direction of flow of grain 11 and positioned to intercept a sample of the grain 11 as it passes through the housing 16. Scalper bars 25 are fixed to the interior sidewall of the housing 16 and extend over the upstream projection of inlet opening 24. Scalper bars 25 form a rake-like barrier of parallel bars spaced apart a distance sufficient to permit passage of grain 11 but deflect foreign objects that may be entrained with grain 11 such a padlocks, pieces of chain or metal and the like. The moisture sensor 23 has an outlet 26 in longitudinal alignment with the inlet 24 to permit return of the sample of grain directed through the sensor to the mainstream of grain flow. While within the moisture sensor 23, the moisture of the passing grain is detected by any common and preferred type of sensing mechanism. For example, a capacitor 27 can be mounted in the passage of the moisture sensor 23, having spaced apart capacitive plates positioned generally parallel to the flow of grain such that a grain sample flows between them. The capacitence between the plates will vary according to the moisture content of the passing grain. By passing grain samples of known moisture conent through the capacitor 27, the electronic output can be calibrated for a particular grain. The electronic signal can be in terms of a voltage. The higher moisture content of the grain, the greater the ability to conduct current across the capacitence plates. A typical calibration could be a voltage output of between 0 and 4 volts over the the typical range of moisture content being measured. The output signal from the moisture sensor 23 is carried by electrical line 28 to the wetting station 14. The moisture sensor 23 provides continuous monitoring of the moisture content of grain passing from the conveyor 18 and through the sensor housing 16. The grain sample deflected through the moisture sensor 23 is returned to the normal grain stream at outlet 26 and travels to the flanged inlet 20 of the mixing and transfer apparatus 15. The mixing and transfer apparatus 15 includes a tubular auger housing 22 having an auger flight 30 installed on an auger shaft 31 that is driven by suitable power such as an electric motor (not shown) at a controlled speed. The grain travels from the inlet 20 through the longitudinal length of the auger housing 22 to a discharge end for further processing or conveying to the destination location. A water-wetting agent mixture is applied to the grain in the auger housing 22 in an amount calibrated according to the electronic output provided by the moisture sensor 23. Auger flight 30 serves to thoroughly mix the water mixture and the grain preparatory to consumption by the animal. Means for introduction of the water mixture to the grain comprises a spray nozzle 33 carrying water mixture in the form of pressurized spray product 34 and mounted on the side of auger housing 22. The liquid is delivered by a liquid supply line 35 extending from the wetting station 14, and is derived from a water supply line 36 and an additive supply line 38. The additive supple line 38 extends from wetting station 14 to a container 39 of additive such as a wetting agent. Container 39 rests on a commercial scale 40 supported on ground surface 41 for purposes of determining depletion of container 39. Spray product 34 is thoroughly mixed in with the passing grain by the auger flight 31 as it travels through the auger housing 22 to its destination. Referring to Fig. 2, water supply line 36 derives a supply of water under pressure from a remote water pump 43 as might be associated with a well, or from water tanks or a public water supply or the like. Water supply line 36 extends through an automatic water valve 44 that is under the control of the moisture sensor 23, and to the water meter pulser 45. Water meter pulser 45 produces an electrical control signal according to the water flow that is carried by signal line 46 to a chemical metering pump 47. The water supply line 36 extends from the water meter pulser 45 through a flow gauge 48 and to the fluid supply line 35 leading to the spray nozzle 33. A delivery tube 49 extends from the chemical metering pump 47 to a fitting 50 connected to the water supply line 36 for introduction of an additive to the water supply. The additive is supplied to the chemical metering pump 47 by the additive supply line 38 extending from the additive container 39 shown in Fig. 1. A power supply 52 provides power to the moisture sensor 23 through power lines 53, and to other electrical components located at wetting station 14. The output voltage of the moisture sensor is carried by main signal lines 55 through the electrical conduit 28 back to the wetting station 14. A first signal control branch 56 carries the signal voltage to a first signal converter terminal 59. The first signal converter terminal 59 converts the voltage signal to an amperage signal measureable in milliamps for control of the automatic water valve 44. The milliamps signal output from the first signal control terminal 59 is fed to a terminal board 62. Terminal board output lines 63 extend from the terminal board 62 to the automatic water valve 44. The first signal converter terminal 59 is calibrated according to one type of grain being processed. For example, the first signal converter terminal 59 can be calibrated for corn. The calibration is with reference to corn at a target moisture level. When the feed lot or operator is processing corn, the operator activates the first signal converter terminal 59. A second branch 57 carries the voltage signal output of the moisture sensor 23 from the the main signal line 55 to a second signal converter terminal 60. The second signal converter terminal 60 is also connected to the terminal board 62. Second signal terminal converter 60 is calibrated according to a second type of grain such as milo. This calibration will differ from that for the first signal converter terminal due to the differing characteristics of the two grains. Accordingly, when the operator of the apparatus is conditioning the second grain, the second signal converter terminal 60 will be actuated to the exclusion of the first signal converter terminal 59. The second signal converter terminal 60 converts the input voltage to an amperage, for example, in the range between 0 - 20 milliamps which is transmitted to the terminal board 62. Signal converter terminal is calibrated with respect to a target moisture content of the grain to open or close the automatic water valve 44 in an amount according to the voltage sensed by the moisture sensor for the particular grain being processed. First signal converter terminal 59 is controlled by a relay or switch 64. The second signal converter terminal 60 is actuated by a second relay or switch 65. Each signal converter terminal operates to the exclusion of the other, i.e., only one at a time can be actuated. The moisture sensed by the moisture sensor 23 is relayed to one of the signal converter terminals, then to the terminal board 62 before passing the signal through the output branch 63 to the automatic water valve 44. Water meter pulser 45 measures the volume of water flow through the water supply line 36 and converts the information to an electrical signal that travels through signal line 46 to the chemical meter pump 47 which pumps a correct or desired amount of additive through the connecting line 49 proportionate to the volume of water. Water meter pulser 45 can be of the pulser variety having a turbine mounted magnet that rotates responsive to water flow, generating a programmable electrical pulse transmitted to the chemical metering pump 47 to actuate the pump according to the volumetric water flow. Alternatively the chemical metering pump 47 can also be controlled from the same signal that drives the automatic water valve. Chemical metering pump 47 has a stroke length control 68 and a frequency control 69 to regulate the rate of addition of additive to the water supply. Flow gauge 48 gives visual indicia of the water flow rate for reference purposes. Flow gauge 48 comprises a vertical, transparent tubular member calibrated from bottom to top and open for passage of water. A ball or other weighted member 71 is located in the passage of tubular member 70 and is pushed upward along the sideways calibrations on the tubular member 70 according to the flow rate of the water. Other flow rate meters could be employed. In the use of the flow moisturizing apparatus 10, the signal converter terminals 59, 60 are one each calibrated according to a type of grain. For example, most feed lots condition one or two types of grains, but generally not more. The first signal converter terminal 59 can be calibrated according to conditioning of corn, and the second for milo, or other grains. Grain samples with known moisture contents are passed through the moisture sensor, and the siganl is measured. The grain sample can have a known moisture content as determined by AOAC standard laboratory methods. This is repeated for numerous data points. Thereafter, when the calibrated voltage is sensed by the moisture sensor, the moisture content of the grain is known. The automatic water valve 44 is programmed to open or close according to a voltage sense signal directed to it. The voltage signal will be from one of the first or second signal converter terminals. Grain from an origin location is passed through the grain pipe or conduit 18 through the sensor mounting housing 16. A sample of the grain, for example 4 or 5 per cent of the grain, passes through the moisture sensor chamber defined by the sidewalls of moisture sensor 23, and then through the moisture sensor outlet 26 to be reunited with the main grain stream. The moisture content of the passing grain is sensed in moisture sensor 23. The information is transmitted through the main signal line 55 in electrical conduit 28 to the wetting station 14. The signal is diverted through either the first or second signal converter terminals 59, 60, then through the terminal board 62 and the signal connecting line 63 to the automatic water valve 44. A delay circuit can be interposed to account for the time lag for the grain to travel from the moisture sensing station 72 to the wetting station 14 at the spray nozzle 33. The automatic water valve 44 opens, closes or remains in position according to the signal being sensed. The water flow is sensed by the water meter pulser 45 which transmits a signal accordingly to the chemical metering pump 47 and actuates the chemical metering pump 47 to deliver a controlled amount of additive to the water supply at the fitting 50 to be added and mixed with the water in fluid supply line 35. The mixture then passes through the spray nozzle 33 into and is mixed with the grain, conditioning it preparatory to being fed to the animals. The additive is derived from the additive container 39 and delivered through the additive supply line 38 to the chemical metering pump 47. While there has been shown and described a preferred embodiment of the invention, it will be apparent that certain deviations can be had from the embodiment shown without departing from the scope of the invention as described in the appended claims.

Claims: A feed grain conditioning apparatus for conditioning of feed grain to bring the moisture content to an approximate target moisture content through the addition of moisture derived at least in part from a water supply, as the feed grain (11) moves in a downstream direction from a first location toward a second location, comprising: grain conveying means for moving the grain in said downstream direction, having a sensing station (12) and a wetting station (14, 15) located downstream of the sensing station; a moisture sensor (23) of the type to continuously monitor moisture content of grain and convert the measurement into an electronic signal, positioned at the sensing station (12) located to intercept a sample of passing feed grain for substantially continuous measurement of the moisture content of the sample and translation of the measurement into an electronic signal; liquid applicator means (33) located at the wetting station (14, 15) positioned to disperse liquid derived at least in part from a water supply line (36) upon passing feed grain; a liquid supply line (35) connected to the liquid applicator means (33) and for connection to the water supply line (36); an automatic water valve (44) connected in the water supply line (36) having an electronically actuated valve control moveable between open and closed positions to regulate the amount of water flow to the liquid applicator means (33) for application to passing feed grain; means (55, 59, 60, 62) connecting the moisture sensor (23) to the electronically operated valve control of the automatic water valve (44) so that the valve control operates responsive to the electronic signal generated by the moisture sensor (23) according to the difference between the moisture content of the grain sample as sensed by the moisture sensor (23) and the target moisture content, said connecting means (55, 59, 60, 62) including calibrated means (59, 60) connected between the moisture sensor (23) and said valve control for regulation of the automatic water valve (44) by the signal from the moisture sensor (23) calibrated according to a known moisture content of the type of feed grain to be conditioned; characterized by an additive supply container (39) for containing liquid additive for mixture with the water for application to the feed grain, a chemical metering pump (47) connected to the additive supply container (39), an additive supply line (49) connected between the chemical metering pump (47) and the liquid supply line (35) to supply an additive in regulated amounts proportionate to the volumetric flow of liquid to the liquid supply line for mixing with the water preparatory to application to the feed grain, and by said conveying means including an auger assembly (15) of the type having an auger housing (22) and an auger (31) located in the auger housing for movement of the grain along at least a portion of the path between said first and second locations, said liquid application means (33) located at said wetting station (14, 15) mounted on the auger housing (22) applying moisture in the auger housing (22) to the passing grain. The feed grain conditioning apparatus of claim 1 wherein the apparatus is adapted for conditioning a first type of feed grain and said calibrated means (59, 60) including: a first signal converter terminal (59) connected between the moisture sensor electronic output and the valve control of the automatic water valve (44) and calibrated with reference to the first type of feed grain at a target moisture level for electronic output to regulate the automatic water valve (44) according to the electronic signal generated by the moisture sensor (23) derived from movement of the first type of feed grain sample through the moisture sensor (23). The feed grain conditioning apparatus of claim 2 wherein said apparatus is adapted for conditioning a second type of feed grain and said calibrated means (59, 60) including: a second signal converter terminal 60 connected between the moisture sensor electronic output and the valve control of the automatic water valve (44) and calibrated with reference to the second type of feed grain at a target moisture content for electronic output to regulate the automatic water valve (44) according to electronic signal generated by the moisture sensor (23) derived from movement of the second type of feed grain sample through the moisture sensor (23); and switch means (64, 65) for switching between first signal converter terminal (59) output and the second signal converter terminal (60) output to the valve control of the automatic water valve (44). The feed grain conditioning apparatus of any one of the claims 1 to 3 including: means (45) sensing the volumetric flow rate of water from the water supply line (36) and being connected (46) to the additive pump (47) control to regulate the flow of additive according to the volumetric flow of water. The feed grain conditioning apparatus of any one of the claims 1 to 4 wherein said wetting station (14, 15) includes; a mixing and transfer chamber (15) for transfer of grain from the sensing station (23) past the wetting station (14, 15), said liquid applicator means (33) communicating with the mixing and transfer chamber (15), means (31) for moving the grain through the mixing and transfer chamber (15) and mixing the liquid with the feed grain and moving it toward the second location. The feed grain conditioning apparatus of claim 5 wherein: said mixing and transfer chamber (15) is an auger housing (22), and said means (31) for moving the feed grain in the auger housing comprises an auger (31). The feed grain conditioning apparatus of any one of the claims 1 to 6 including: moisture sensor housing (16) disposed at said sensing station (12) having an inlet (18) and an outlet (19) for transfer of the feed grain; said moisture sensor being mounted in the housing and having a tubular inlet (24) and tubular outlet (26) disposed perpendicular to the direction of movement of grain (11) to intercept a sample of grain and measure the moisture content of the passing grain. The feed grain conditioning apparatus according to any one of the claims 1 to 7, wherein moisture sensor (23) is a capacitence type moisture sensor. A method of conditioning a type of feed grain (11) as it is moved downstream from a first location along a path toward a second location, through regulated addition of moisture derived at least in part from a water supply, in order to increase the moisture content of the feed grain to bring it to an approximate target moisture content, comprising the steps of: measuring the moisture content of a sample of the moving grain at a sensing station (12) on the path of travel of the grain, using a moisture sensor (23) of the type to substantially continuously monitor the moisture content of moving grain (11) and translate the measurement into a substantially continuously generated electronic signal; providing moisture to the passing grain (11) using a liquid applicator means (33) at a wetting station (14, 15) located downstream of the sensing station (12) with respect to the direction of grain movement; providing liquid to the liquid applicator means (33) through a liquid supply line (35) extended from a water supply line (36); providing an automatic water valve (44) in the water supply line (36) of the type having an electronic valve control for regulating the opening and closing of the valve to regulate water flow through the valve by an electronic signal; and controlling the automatic water valve (44) with the electronic signal generated by the moisture sensor (23) to modulate the flow of water to the liquid applicator means according to the moisture content of the grain sample sensed by the moisture sensor; characterized by introducing a liquid additive into the liquid supply line (35) in an amount proportionate to the volumetric flow of water in the liquid supply line (36); providing an auger assembly (15) of the type having an auger housing (22) and an auger (31) located in the auger housing for movement of the grain along at least a portion of the path of movement of the grain from the first location toward the second location, and applying moisture in the auger housing (22) to the passing grain at said wetting station (14, 15) by said liquid applicator means (33) mounted on the auger housing (22).

Inventors: GREER DAVID G, GREER, DAVID G.
Applicants: AGRICHEM INC, AGRICHEM, INC.
Application year: 1989
Main classification: A23N17
IPC codes: B02B1, A23N17