For example, in the summer or fall season or when the moisture content of the raw materials used in the formula is low, we must think of ways to increase the moisture content of the material. In this case, as long as the production needs are met, the lower the pressure, the better. The boiler steam supply pressure can be Adjusted to 0.3-0.5 MPa (megapascals), production pressure can be adjusted to 0.2 MPa (generally, as long as the pressure is not less than 0.2 MPa, the steam temperature is not less than 120 °C are effectively available); according to the actual situation , Close all or part of the trap to increase the water content of steam to achieve the purpose of increasing the moisture content of the material after conditioning; on the contrary, if the moisture content of the material is higher, the opposite operation should be carried out accordingly.
Level of tempering Normally, the longer the residence time of the material in the conditioner, the more fully it mixes with the steam, and the water absorbed from the steam will increase accordingly, and the moisture content of the material is undoubtedly higher. In the production process, if the moisture content of the material is low, it is necessary to absorb more water by increasing the conditioning time. To increase the conditioning time, you can increase the effective length of the conditioner, reduce the speed of the conditioner, and adjust the blade angle of the conditioner blade. In addition, try to fill the material conditioner with as much material as possible so that the material can absorb more. Moisture.
The die hole size and its effective thickness of the die are different from the effective hole thickness of the die, and the moisture content of the produced pellet feed product will also be different: the die with small aperture, the feed pellet produced by it will have smaller diameter, and the cooling wind Easy to penetrate the particles, so when the cooling away more water, product moisture is lower; conversely, the large diameter die, feed particles larger diameter, cold wind does not easily penetrate the particles, cooling water taken away, the product moisture Higher. In the case of a die with a larger effective thickness, the frictional resistance during the granulation is larger, the material is more difficult to pass through the die hole, the frictional temperature is higher, the water loss is greater, and the moisture content of the granular product is lower; on the contrary, the thinner die, Its pellet product has higher moisture content.
Based on the above principles, in the production process, the most suitable die should be selected according to the actual situation, and according to the actual situation of the die used, other factors affecting the moisture content of the particles should be adjusted accordingly.
The purpose of cooling on the one hand is to reduce the temperature of the pellet feed so that it does not exceed 3°C, and on the other hand to remove the moisture from the pellets (generally, in the cooling tower, Every 11°C reduction in temperature will cause the feed to remove a percentage of moisture, so that the final feed moisture content meets the required standards. The dry, smaller pellet feed should have a smaller amount of cooling air and a shorter cooling time. Conversely, for a relatively wet, large pellet feed, some air volume should be increased to increase the air drying time.
There is sometimes a special situation where the water is atomized in the mixer. The water content of the raw material used in a feed is relatively low, and the die used is also relatively small. After the process of ripening, the moisture content of the finished product must be very high. low. For example, the shrimp feed, its raw material itself, the water content is lower, even in the conditioning phase, even if the temperature of the material has exceeded 100 °C, but the moisture content is still far from enough, or can not reach the ideal moisture content into the mold, is not conducive to the smooth Granules also affect the formation of granules; the dies used for granulation are also relatively small and thick, and after a longer maturation process at a higher temperature, the water loss is higher, and the moisture content of the final product is necessarily too low (generally 4 % ~ 7% or so), for the producers, not only is not conducive to production, but also lost more than 4% of the finished feed weight. In this case, it is the best solution to increase the moisture content of the material by adding atomized water when the material is mixed. The practice proves that about 2% of water is added, and then the necessary reinforcement and tempering are available. Satisfactory results.
The drying (or post-curing) level should be adjusted according to the size of the pellets and the amount of moisture, and the drying time and drying temperature used (adjustable by adjusting the speed of the track, the amount of steam, and the position of the leveler). The size of the fan air volume, etc. to achieve) so as to avoid excessive dry or too wet. This must be based on different products and different levels of tempering in the production, and constantly seeking to get the best data.
Finished product management Finished product management is also very important. Granulated (or post-matured) feed pellets must be fully cooled by coolers before they can be packaged. Under normal circumstances, the temperature of the finished product bin feed must not exceed 3°C at room temperature. Can not have a warm feeling to reach the standard. It is best to avoid sun exposure after packaging, otherwise the residual moisture in the product will migrate to the place where the packaging and storage temperature is lower, so that the humidity in these places will increase, and the feed products in these locations are more prone to mildew. At the same time, we must ensure that the finished product warehouse has good ventilation conditions. The specific storage time depends on the moisture, see Table 1.
In short, in the feed processing process to strengthen the moisture control of the processing object, can increase productivity, increase economic efficiency, while more rational use of equipment, and continuously improve the quality of feed products to ensure feed quality and safety.
Level of tempering Normally, the longer the residence time of the material in the conditioner, the more fully it mixes with the steam, and the water absorbed from the steam will increase accordingly, and the moisture content of the material is undoubtedly higher. In the production process, if the moisture content of the material is low, it is necessary to absorb more water by increasing the conditioning time. To increase the conditioning time, you can increase the effective length of the conditioner, reduce the speed of the conditioner, and adjust the blade angle of the conditioner blade. In addition, try to fill the material conditioner with as much material as possible so that the material can absorb more. Moisture.
The die hole size and its effective thickness of the die are different from the effective hole thickness of the die, and the moisture content of the produced pellet feed product will also be different: the die with small aperture, the feed pellet produced by it will have smaller diameter, and the cooling wind Easy to penetrate the particles, so when the cooling away more water, product moisture is lower; conversely, the large diameter die, feed particles larger diameter, cold wind does not easily penetrate the particles, cooling water taken away, the product moisture Higher. In the case of a die with a larger effective thickness, the frictional resistance during the granulation is larger, the material is more difficult to pass through the die hole, the frictional temperature is higher, the water loss is greater, and the moisture content of the granular product is lower; on the contrary, the thinner die, Its pellet product has higher moisture content.
Based on the above principles, in the production process, the most suitable die should be selected according to the actual situation, and according to the actual situation of the die used, other factors affecting the moisture content of the particles should be adjusted accordingly.
The purpose of cooling on the one hand is to reduce the temperature of the pellet feed so that it does not exceed 3°C, and on the other hand to remove the moisture from the pellets (generally, in the cooling tower, Every 11°C reduction in temperature will cause the feed to remove a percentage of moisture, so that the final feed moisture content meets the required standards. The dry, smaller pellet feed should have a smaller amount of cooling air and a shorter cooling time. Conversely, for a relatively wet, large pellet feed, some air volume should be increased to increase the air drying time.
There is sometimes a special situation where the water is atomized in the mixer. The water content of the raw material used in a feed is relatively low, and the die used is also relatively small. After the process of ripening, the moisture content of the finished product must be very high. low. For example, the shrimp feed, its raw material itself, the water content is lower, even in the conditioning phase, even if the temperature of the material has exceeded 100 °C, but the moisture content is still far from enough, or can not reach the ideal moisture content into the mold, is not conducive to the smooth Granules also affect the formation of granules; the dies used for granulation are also relatively small and thick, and after a longer maturation process at a higher temperature, the water loss is higher, and the moisture content of the final product is necessarily too low (generally 4 % ~ 7% or so), for the producers, not only is not conducive to production, but also lost more than 4% of the finished feed weight. In this case, it is the best solution to increase the moisture content of the material by adding atomized water when the material is mixed. The practice proves that about 2% of water is added, and then the necessary reinforcement and tempering are available. Satisfactory results.
The drying (or post-curing) level should be adjusted according to the size of the pellets and the amount of moisture, and the drying time and drying temperature used (adjustable by adjusting the speed of the track, the amount of steam, and the position of the leveler). The size of the fan air volume, etc. to achieve) so as to avoid excessive dry or too wet. This must be based on different products and different levels of tempering in the production, and constantly seeking to get the best data.
Finished product management Finished product management is also very important. Granulated (or post-matured) feed pellets must be fully cooled by coolers before they can be packaged. Under normal circumstances, the temperature of the finished product bin feed must not exceed 3°C at room temperature. Can not have a warm feeling to reach the standard. It is best to avoid sun exposure after packaging, otherwise the residual moisture in the product will migrate to the place where the packaging and storage temperature is lower, so that the humidity in these places will increase, and the feed products in these locations are more prone to mildew. At the same time, we must ensure that the finished product warehouse has good ventilation conditions. The specific storage time depends on the moisture, see Table 1.
In short, in the feed processing process to strengthen the moisture control of the processing object, can increase productivity, increase economic efficiency, while more rational use of equipment, and continuously improve the quality of feed products to ensure feed quality and safety.
Non Woven,Non Woven Fabric,Non Woven Material,Non Woven Fabric Price
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