Application of dephenolization liquid in production of cottonseed protein

Abstract

The invention discloses an application of dephenolization liquid in the production of cottonseed protein, which comprises the following steps: guiding the dephenolization liquid into a wet trap to contact with a gas phase from a drying system; and after the temperature of the dephenolization liquid reaches 70-80 DEG C, recovering methanol in the dephenolization liquid in a rectifying tower. According to the application disclosed by the invention, the fiber in the tail gas of the drying system is trapped by using the dephenolization liquid in the wet trap so as to avoid the use of water for trapping in a traditional way; at the time of trapping the fiber in the tail gas, the dephenolization liquid can be preheated, and the use of heat of the rectifying tower is reduced; moreover, when the tail gas contacts with the dephenolization liquid, the concentration of methanol in the dephenolization liquid also can be greatly reduced, thereby being very favorable for reducing the heat consumption in rectification and greatly shortening the rectifying time.

Description

technical field [0001] The invention belongs to the field of cottonseed extraction and processing, and in particular relates to the application of dephenolization liquid in the production of cottonseed protein. Background technique [0002] The existing cottonseed protein production process such as figure 1 As shown, it generally includes: cottonseed → velvet peeling, shelling → dephenolization → cottonseed protein → drying. In the process of producing dephenolized cotton protein, a large amount of dephenolized liquid is produced. Generally, the treatment of the dephenolized liquid is: the dephenolized liquid is filtered, enters the rectification tower for rectification, and the waste liquid after the rectification recovers methanol is then cooked to recover the residual methanol and then discharged. At the same time, the wet collector in the drying post uses water once to collect the fibers in the gas phase of the drying system. After a period of use, the water will become...

AI Technical Summary

Problems solved by technology

At the same time, the wet collector in the drying post uses water once to collect the fibers in the gas phase of the drying system. After a period of use, the water will become a low-alcohol methanol solution due to the absorption of methanol solvent in the gas phase, generally at about 40°, before being discharged. It is necessary to carry out rectification and cooking to recover the absorbed methanol. In order to treat this part of water, additional investment in rectification tower equipment is required, which also results in excessive steam consumption.

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