A kind of production technology of corn pulping fiber

Abstract

The invention relates to a production technology of corn pulp addition fibers. The production technology sequentially comprises the following steps of separating corn fibers in a corn starch plant into dehydrated corn fibers and dehydrated fluid, conveying the dehydrated corn fibers into a first pipe bundle drier for first-stage drying, and controlling a product return ratio; after the first-stage drying, performing primary pulp addition with thick corn pulp, performing uniform mixing to obtain a first mixture, conveying the first mixture into a second pipe bundle drier for second-stage drying, and controlling a product return ratio; after the second-stage drying, performing secondary pulp addition with thick corn pulp, performing uniform mixing to obtain a second mixture, conveying the second mixture into a third pipe bundle drier for third-stage drying, and controlling a product return ratio; enabling discharged corn fibers after the third-stage drying, namely corn pulp addition fibers to enter a multi-stage countercurrent cooling tower for cooling; and respectively performing dust removal and residual heat recover on the high-quality tail gas of the first pipe bundle drier, the high-quality tail gas of the second pipe bundle drier, and the low-quality tail gas of the third pipe bundle drier, and gradually concentrating thin corn pulp into the thick corn pulp through recovered heat. The production technology of the corn pulp addition fibers disclosed by the invention is low in steam consumption and power consumption, high in drying efficiency and good in product quality.

Description

technical field [0001] The invention relates to a production process of protein feed, in particular to a production process of corn pulped fiber, and belongs to the technical field of corn pulped fiber production. Background technique [0002] The corn starch factory adopts corn soaking and wet grinding production process. The main product is starch, and the by-products include corn gluten powder, corn germ, corn fiber, and corn steep liquor. Corn fiber and corn steep liquor can be mixed together to obtain corn pulp fiber, which is rich in protein and is a good protein feed. [0003] Corn pulping fiber is a feed obtained by mixing and drying corn steep liquor after soaking corn and crushed corn fiber. Since the protein content of corn pulping fiber is more than 18%, it has become a new type of feed widely used by domestic and foreign feed manufacturers. Protein feed raw materials are usually used to replace soybean meal and fish meal in livestock and poultry and aquatic com...

AI Technical Summary

Problems solved by technology

Such technique has the following disadvantages: (1) after the corn fiber is dried to a moisture content lower than 12%, a shell will be formed on the surface, and corn steep liquor is added at this time, and the thick corn steep liquor is not easy to penetrate into the corn fiber inside, but Adhesive to the surface of corn fiber, so that the corn fiber is easy to form agglomerates, and the product quality is poor

(2) One-time drying of the corn pulping fiber in place, the steam consumption is large, the drying efficiency is low, and it is not conducive to the cascade utilization of energy

⑶In order to discharge the humidity as quickly as possible, the exhaust air volume of the tube bundle dryer is relatively large, and the opening of the fresh air damper is also relatively large, so that the exhaust gas temperature of the tube bundle dryer is low and the air content is high, which reduces the quality of the exhaust gas and is not conducive to environmental protection. Exhaust gas for waste heat recovery and utilization

(4) At present, in corn starch factories, all corn steep liquor cannot be added to corn fiber, only about 70% of corn steep liquor can be added, and the remaining corn steep liquor can only be sold or discharged to sewage treatment plants

Because of the current process, adding all corn steep liquor, 1 energy consumption is very high, resulting in too high cost of corn pulp fiber

2 The color of corn pulping fiber is very dark, which is difficult to accept in the market

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