What causes the chicken feeding apparatus to squirt feed?
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The conditioning process is essentially a pretreatment of the raw materials. If too much or too little steam is added, or the conditioning time is insufficient, the raw materials will either be too wet and sticky, or too dry and loose, both of which will cause spraying. Many people overlook the conditioning step, thinking that "just let some steam through," but if the parameters are not adjusted correctly, spraying problems will continue to occur.
Why is the material spraying out if the steam dosage is incorrect?
1. Too much steam: Too much steam will cause the raw material to have excessive moisture (over 18%), becoming like "mud," sticking to the screw and unable to be pushed forward, spraying out from the feed inlet; it will also cause the raw material temperature to be too high (over 90℃), becoming too soft and unable to be extruded into shape.
Solution: Close the steam valve to reduce the steam dosage (add 5-8kg of steam per 100kg of raw material), and at the same time use a thermometer to measure the temperature of the conditioned raw material, controlling it at 75-85℃.
2.Too little steam: Too little steam means the raw material is not fully heated, the starch gelatinization rate is low (below 70%), like "raw flour," lacking stickiness, unable to stick together and be pushed forward, instead being thrown back to the feed inlet and sprayed out by the screw.
Solution: Open the steam valve to increase the steam dosage (not too much, to avoid excessive moisture), ensuring that the conditioned raw material can be felt with some warmth and stickiness when squeezed by hand.
Why is the material being sprayed if the conditioning time is insufficient?
The conditioner speed is too high (e.g., exceeding 35 rpm), the raw material spends too little time in the conditioner (less than 30 seconds), the steam and raw material are not fully mixed, some raw material is wet and some is dry. The dry raw material slips in the barrel and is sprayed, while the wet raw material sticks to the material. Solution: Slow down the conditioner speed (to 25-30 rpm), extend the time the raw material spends in the conditioner (40-50 seconds), allow the steam and raw material to mix fully, and ensure that all raw materials have uniform moisture and temperature.
Why is the feed spraying out due to unstable steam pressure?
Fluctuating steam boiler pressure (e.g., sometimes 0.6 MPa, sometimes 0.3 MPa) causes inconsistent steam supply during conditioning, resulting in inconsistent raw material moisture levels and intermittent feed spraying. Solution: Install a pressure stabilizing valve on the steam pipeline to maintain a stable pressure of 0.4-0.5 MPa, ensuring a uniform steam supply.
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