Hammer mill, pellet mill, extruder and so on are the most commonly used processing equipment in feed factories. Their output directly determines the production efficiency and productivity of feed factories. There are many factors affecting the output of feed processing equipment. In addition to equipment assembly, debugging, or maintenance in the operation process, there are mainly the following aspects.
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• The horn mouth of ring die surface is calendered, it need re-chamfer.
• Improper selection of ring die compression ratio. The suitable compression ratio: livestock and poultry feed 9-13, fish feed 12-15, shrimp feed 20-25, heat-sensitive feed 5-9, forage grass and straw feed 6-9.
• The die hole is blocked. Clout the blocked hole from the outside to the inside of the ring die to remove impurities.
• The low opening rate of ring die leads to low output.
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The roller shell is worn out and needs to be replaced in time.
The combination of new ring die and old roller, new roller and old ring die may result in low output. A new ring die with a new roller shell should be used for pelleting so that the contact clearance between roller and ring die is consistent to achieve uniform wear.
Blade wear may affect material conditioning, causing poor effect of material mixing and steam absorption. Material softening of conditioner is bad, affecting the particle pulverization rate and output.
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If the conditioning temperature is too low, the reasonable temperature should be controlled at: livestock and poultry feed 70-88℃; fish feed 82-95℃; shrimp feed 90-105℃; heat-sensitive feed 45-69℃.
The steam pressure of cylinder should be more than 0.6 Mpa, the steam pressure after decompression should be 0.1-0.3 Mpa, and the trap should work normally to ensure that the steam is saturated steam without condensation water.
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• Whether the material has been crushed at the first crushing section or not.
• Whether the material is added oil at the secondary mixing section or not.
• Whether silkworm chrysalis and other raw materials have been added to the formula or not.
• Whether the direction of steering board and the main engine is consistent or not.
• Whether the solenoid valve of the dust remover jets normally and whether the hop-pocket is blocked.
• The fan configuration of dust remover is wrong, and the fan steering is wrong.
• The gap between hammer and sieve is unsuitable, and the hammer is worn out.
• The pressure sieve plate is worn out.
• The holes of sieve are not arranged in the right way, and the opening rate is too low.
• The air compensating vent of impeller feeder is not opened or the opening degree is not appropriate.
• The moisture content of raw materials is too high.
• Sieve aperture does not meet the requirements, resulting in excessive crushing of materials.
• Whether the smooth surface and the rough surface of sieve are installed correctly.
• The settling chamber leaks seriously.
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1. Low output of extruded soybean
• The screw head is worn out.
• The bushing of extrusion chamber is worn out.
• The pressure ring and wear ring are worn out. At this time, the wear-out parts should be replaced in time. Large wear-out pressure ring can be used as small pressure ring.
• Customers want to obtain extruded soybean products with low urease activity.
• The crushing fineness of soybean is too coarse.
• Triangular belt tension is relatively loose, it should be checked in time. If the belt has aged, the whole set of belt should be replaced together.
• If the steam quality of conditioner is poor, the steam quality should be checked in time and the drainage system of steam pipeline should be checked.
2. Low output of extruded corn
• The screw head is worn out.
• The extrusion chamber is worn out.
• The pressure ring and wear ring are worn out.
• Customers want to get low bulk density extruded corn products.
• Corn crushing fineness is too coarse.
• Triangular belt tension is relatively loose.
• Steam quality of conditioner is poor.
• Corn quality. Excessive drying causes that it is difficult for the corn after first maturing to produce 380 g/l of extruded corn.
