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Environment-friendly treatment method for cellulose evaporation waste liquid

An environmental protection treatment and cellulose technology, which is applied in the process of wastewater treatment, filtration treatment, sedimentation treatment, etc., can solve problems such as increasing treatment pressure, and achieve the effect of reducing treatment pressure, increasing profit points, and solving the pressure of evaporating residual liquid.

Inactive Publication Date: 2020-03-24
高密银鹰新材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Environmental protection stations generally use anaerobic bacteria and aerobic bacteria to treat evaporation waste liquid, but as the volume increases, the processing pressure increases

Method used

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  • Environment-friendly treatment method for cellulose evaporation waste liquid

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Embodiment Construction

[0021] In order to enable those skilled in the art to better understand the application process, the following will be combined with the attached figure 1 , to clearly and completely describe the process in the embodiment of the present application.

[0022] An environmentally friendly treatment method for cellulose evaporation waste liquid, the evaporation waste liquid includes highly concentrated raffinate and low concentrated raffinate, comprising the following steps:

[0023] (1) The highly concentrated raffinate is cooled down, the temperature is lowered to 20°C and then left to stand, the first organic salt is precipitated through crystallization and recovered, and the first upper layer liquid is kept in the first storage tank; crystallization refers to when When the substance is in a non-equilibrium state, another phase will be precipitated, and this phase will be precipitated in the form of crystals.

[0024] (2) Add a mixed solvent containing organic alcohols to the ...

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Abstract

The invention discloses an environment-friendly treatment method of cellulose evaporation waste liquid, the cellulose evaporation waste liquid comprises high-concentration residual liquid and low-concentration residual liquid, the method is as follows: cooling the high-concentration residual liquid, standing, separating out a first organic salt through crystallization and recovering, and reservinga first supernatant; adding a mixed solvent containing organic alcohols into the first supernatant, fully mixing the first supernatant with the mixed solvent, standing at the temperature of 16-20 DEGC, crystallizing, filtering, drying to separate out a second organic salt, and reserving second supernatant; mixing the low-concentration residual liquid with a pure solvent, cooling to 20 DEG C, standing, crystallizing, filtering, drying to separate out a third organic salt, and reserving third supernatant; and mixing the second supernatant and the third supernatant, and distilling to obtain a fraction. By utilizing the physical properties of each component in the waste liquid, the waste liquid is separated, waste is turned into wealth, the waste liquid treatment pressure is greatly reduced,and the method is environment-friendly and practical.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an environmentally friendly treatment method for cellulose evaporation waste liquid. Background technique [0002] Cellulose is the oldest and most abundant natural polymer on the earth. It is inexhaustible and the most precious natural renewable resource for human beings. In industrial applications, the production raw materials come from wood, cotton, cotton linters, wheat straw, straw, reed, hemp, mulberry bark, mulberry bark and bagasse, etc., and the plant raw materials are cooked with sulfite solution or alkaline solution, mainly Removal of lignin is called sulfite method and alkali method respectively, and the obtained materials are called sulfite pulp and alkali method pulp, and then the residual lignin is further removed through bleaching, and the obtained bleached pulp can be used for papermaking, and the semi-fiber is further removed It can be used as a ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/28
CPCC02F1/001C02F1/04C02F1/58C02F9/00C02F2001/007C02F2001/5218C02F2103/28C02F2209/02
Inventor 姚江韬张媛媛黄肇雄
Owner 高密银鹰新材料股份有限公司
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