Efficient use of poultry livestock fish feed pelletizer machine and improvement of granulation effect
Animal poultry chicken cattle aqua feed pellet machine is the key feed processing equipment to ensure the quality of animal pellet feed. Mastering the working principle of poultry livestock fish feed pelletizer can achieve the improvement of pelleting effect and improve the palatability and nutritional balance of pellet feed, which is the basis for improving feed quality.
1. Principle of animal poultry chicken cow rabbit broiler feed pellet machine
In the animal feed pelletizing process, the poultry cattle chicken feed pelletizer is the most important equipment. According to the working principle of the pelletizing mechanism, it can generally be divided into two types: feed pellet mill machine and feed extruder. The animal feed pelleting machine presses the feed materials in a closed body; the feed extruder uses a resistance force generated by the pressing of the die wall of the pelletizer to press the feed pellets. The structural characteristics of the pressing granule components can be divided into plunger type, screw type, ring die animal feed pelletizer machine and flat die animal feed pellet mill machine.
2. The structure of the animal poultry livestock horse goat duck dog cow prawn pig feed pellet making machine
General animal poultry livestock goat horse cattle pig feed pellet maker machine is mainly composed of stepless speed regulation feeding system, mixing and tempering system, granulation system, transmission system, security system and other parts.
(1) Stepless speed regulation feeding system
The stepless speed regulation feeding system is composed of two parts: a transmission and a feeding auger. The transmission is usually composed of a JZTY electromagnetic speed regulating motor and a reducer. The speed regulating motor is composed of a three-phase asynchronous AC motor, an eddy current clutch and a tachogenerator, and is used in conjunction with a JZTY controller. Through the JZTY type electromagnetic speed regulating motor controller, the output speed can be changed, and after the speed reducer with a reduction ratio of 1:10, the screw feed auger shaft is driven to rotate to achieve infinitely variable feeding and control different feeding amounts the goal of. Feeding auger is composed of auger, auger shaft, bearing with seat, etc. Its function is to convey the powdery material in the storage hopper to the agitator through the rotation of the auger shaft. The auger, the auger shaft and its blades are all made of stainless steel, and the auger shaft blades are full-faced. The auger shaft can be withdrawn from the auger, together with the bearing seat, to facilitate the cleaning of the inside and the auger shaft.
(2) Stirring and tempering system
The mixing and tempering system is mainly composed of simplified parts, mixing shaft, bearing with seat, reducer, motor, steam inlet, molasses inlet, security magnet, hoist and other parts. Its function is to vigorously stir the 0.1~0.4MPa steam and feed to soften the material; at the same time, it can also add an appropriate amount of molasses through the molasses adding port, and heat it to 80~100℃, pressurized by the oil pump to form a mist Fat and molasses. The simplification of the mixing conditioner, mixing shaft and blades are all made of stainless steel, and the mixing shaft and bearing seat can be drawn out of the machine for maintenance and cleaning. The stirring shaft is driven by a motor and driven by a reducer with a reduction ratio of 1:4 to achieve the purpose of mixing and conveying materials.
(3) Pelleting system
The granulating system is mainly composed of a discharging chute, a pressing chamber, a cutter and other parts. It is the core of the entire granulator and the decisive factor of the granulating process and the granulating effect.
The unloading chute is composed of a chute, a handle, an observation window and a complete body, and its purpose is to send the tempered material in the mixing conditioner into the pressing chamber for pressing, which plays the role of connecting the above and the below. Open the observation window door to observe at any time, grasp the quality of the material's quenching and tempering, and also can be used as a manual feeding port. When the handle of the chute machine is pulled, the multi functional feed pellet mill machine can discharge the material outside the machine for trial operation and troubleshooting.
The compression chamber is the heart of the pig chicken cattle livestock poultry animal feed pellet making machine. It consists of a die cover, a feeding scraper, a distributor, an annular die, a cylindrical roller, a cutter, and a door cover. Its function is to distribute the material to be granulated from the discharging chute to the rotating ring-shaped die through the distributor. The working surface between the pressing mold and the columnar pressing roller is filled with the material into the compression zone by the rotating pressing mold, and then the pressing roller is driven to rotate by friction with the material, so that the material enters the pressing zone and is merged into the die hole to form. Under strong squeezing, the material overcomes the resistance of the hole wall and continuously extrudes from the die hole in strips. During extrusion, it is installed outside the ring die and cut into pellets of suitable length by a cutter with adjustable position. The feeding scraper is to evenly distribute the material flow to the squeezing area of each press roller and die to reduce vibration and uneven force.
The ring die is a ring die with thousands of evenly distributed small holes. In the process of compacting pellets, the material is forced to pass through these small holes under the strong squeezing action of the die and the pressure roller to be compacted and formed, so the die should have high strength and wear resistance. Generally, high-quality alloy steel, chromium steel (containing 12% to 14% chromium) and carburized stainless steel are used. Its structural characteristic parameters are usually expressed by die hole diameter, die thickness, effective working length, pressure relief hole depth, feed orifice diameter, feed orifice angle, die hole ratio, compression ratio and aspect ratio. . The pressure roller is generally inert or transmission, and its driving force is the friction between the pressure mold and the pressure roller.
Therefore, it is necessary to ensure that the pressure roller has sufficient traction to prevent the pressure roller from "slipping". The main parts of the pressure roller include roller shaft, bearing, seal and roller shell. The diameter ratio of the pressure roller to the pressure mold is about 0.4:1, and the linear speeds of the two are basically the same, so the wear rate of the pressure roller is about 250% higher than that of the pressure mold. Therefore, the inner sleeve of the pressure roller should be processed to have an adjustable eccentric assembly surface for easy assembly, disassembly and repair. There is also a lubrication oil hole on the roller shaft so that the bearings can be lubricated in time while the animal feed pellet mill machine for making pellets is running.
The cutter is a tool used to cut the material after the die hole extrusion into the required length and uniform shape of the granular material. Each pressure roller is equipped with a cutter, and the cutter frame is generally fixed on the door cover The distance from the outer surface of the die can be adjusted appropriately according to the requirements of the particle length. The material is generally nickel-containing hard alloy steel.
(4) Transmission system
The power of the transmission system is output by the main motor, through the internal tooth-shaped elastic coupling, the gear shaft runs coaxially with the motor, and then through a pair of gears to reduce the speed (or directly through the pulley), the empty shaft and The drive shaft and the die rotate together. The compression mold and the transmission wheel are connected with screws and keys (or fixed with a hoop). The pressure roller shaft with eccentricity is installed in the pressure roller bushing of the main shaft and is pressed and fixed by the pressure plate. The pressure roller shaft is equipped with a pressure shaft. When the pressure die rotates, the inscribed pressure roller is driven to rotate due to the friction of the material, and the material brought in by the centrifugal force is squeezed in between to extrude neat particles from the die hole of the pressure die. The distance between the pressure mold and the pressure roller can be changed by adjusting the gap adjustment wheel. The maximum adjustment distance is generally 10mm, and the eccentric pressure roller shaft is rotated around the main shaft and the coaxial hole on the pressure plate.
(5) Security system
The security system includes 4 parts: overload protection, security magnet, protection switch for the door cover of the pressing chamber, and discharge outside the machine.
Overload protection means that when foreign matter suddenly enters between the mold and the roller, the squeezing force will suddenly increase, exceeding the normal pressure, and the pressure roller will stop rotating or follow the mold around the axis of the spindle and drive the original stationary spindle together Rotate to break the safety pin (or the inner friction disc rotates). At this time, the travel switch works, cuts off the power supply, and stops the motor to ensure that other parts of the machine are not damaged and play a role in overload protection.
The security magnet means that when metal magnetic impurities are mixed into the material, it can be removed by the security magnet installed on the stirrer (or feeding chute). The security magnet is a stainless steel fully enclosed type, which has a high life and reliability, and can be quickly removed by the handle.
③Suppression chamber door cover protection
When the pressing chamber door cover protection switch is in normal operation, in order to avoid opening the pressing machine door cover, when it is on the side of the door cover, the stroke switch disconnects all control circuits of the pelletizer of ring die to making animal feed and stops the feed pellet granulator equpiment completely. Or it cannot be started to ensure personnel safety.
④Outside the machine discharge
When discharging outside the animal poultry livestock horse goat sheep rabbit fish feed pellet mill , just pull the handle of the outside discharge to make the chute rotate. At this time, all the materials of the conditioner flow into the outside of the machine without entering the pressing room. It is mainly used for the test machine of the boiler livestock poultry animal feed pellet making machine before normal operation and the emergency discharge in case of failure. After normal operation or troubleshooting, push the discharge handle to reset the chute and discharge normally.
3. Pelletizing process
The process of granulation is to remove the iron from the powdered compound feed through a magnetic separation device, and then send it to the mixing and conditioning system through a continuously variable screw feeder, together with the steam (sometimes adding molasses, fat) ) Stir and mix, so that the protein and starch in the feed are diluted by water under the action of heat, and become a material with strong plasticity, and the crude fiber is heated and softened. At this time, the feed moisture reached 15% to 17%, and the temperature was 65 to 85°C. The quenched and tempered material is sent between the running ring die and the working surface of the pressing roller. The rotating press mold drives the press roller to rotate through friction with the material. Under strong extrusion, the material overcomes the resistance of the hole wall and continuously extrudes from the press mold hole in strips. During extrusion, the cutter installed outside the die is cut into particles of appropriate length, and the position of the cutter can be adjusted to control the length of the particles.
4. Use secondary granulation process to improve quality
After years of development in China, the ring die animal poultry cattle chicken livestock shrimp fish feed pellet milling equipment has a relatively complete specification. The main difference between the secondary granulation process of the ring die ring die animal livestock horse goat duck dog cow prawn pig feed pellet mill unit and the conventional single-stage quenched and tempered granulation process is that the process is equipped with two animal poultry broiler bird cow fish duck feed pellet milling machines. The adjusted sub-packaged raw materials are subjected to the first coarse granulation and then the second granulation.
The essence of secondary refined granulation is to strengthen the conditioning of granulation to improve the quality of the final granules. The principle is that the material enters the chicken cattle sheep poultry and livestock feed pelletizing machine from the raw material bin through the conditioner for the first granulation, usually the aperture is 50% larger than the second level granulation, or the old ring die worn in the second level is used for re-correction and then enters the pellets. The machine performs the second granulation. The process after granulation is basically the same as the conventional pelleting process. The secondary granulation process provides a method of strengthening tempering, which can meet the main conditions such as pressure, temperature and time necessary for adding liquid infiltration materials. The water has been basically absorbed before the second pelleting, which can produce high-quality pellet feed.
In the specific process configuration, there are direct tandem type and belt-added curing tank type. The direct tandem type has a better effect and lower investment cost. The belt type curing tank type is to add a conditioner before the second stage granulation, and the feed pellet cooler is changed to 4-layer cooling. All liquid additives except steam are added to the first stage conditioner. The quality of the primary granules is very low; In the maturer, the hot dry air input from the cooler through the heat exchanger keeps the material at temperature to ensure that the material is fully tempered. Steam is added to the second-pole conditioner to further heat up the material while keeping the surface of the material moist. It plays a role of lubrication when the feed passes through the die for the second time. The horizontal 4-layer cooler can not only provide hot and humid air for the curing device, but also improve the cooling effect. This method can add molasses and fat in large quantities, and is especially suitable for the processing of cattle feed and herbivore feed. Although the investment and operating costs of secondary pelleting are relatively high, the process is easy to control and the pellet quality is significantly improved.