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Method for recycling high-temperature acidic zinc-containing wastewater in cellulose fiber production

A cellulose fiber, medium-high temperature technology, applied in the field of recycling high-temperature acidic zinc-containing wastewater, can solve the problems of waste water energy and materials not being effectively used, waste of resources, treatment costs, product precipitation and waste residues, etc., to avoid COD value Excessively high, improve the recycling rate, improve the effect of economic benefits

Inactive Publication Date: 2019-04-05
马杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a method for recycling high-temperature acidic zinc-containing wastewater in the production of cellulose fibers, so as to solve the pollution caused by a large amount of product precipitation and waste residue caused by the use of neutralization precipitation method in the prior art to treat wastewater, and The energy and substances in the wastewater are not effectively utilized, resulting in waste of resources and high treatment costs

Method used

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Experimental program
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Embodiment 1

[0029] This embodiment is a method for recycling high-temperature acidic zinc-containing wastewater in cellulose fiber production. The method includes the following steps:

[0030] Step 1, passing the high-temperature acidic zinc-containing wastewater through a tow filter and a microporous filter in sequence, wherein the pore size of the microporous filter is 5 μm;

[0031] Step 2. Use a plate heat exchanger to transfer the heat in the pretreated wastewater to the cold fluid, and then use a hot water lithium bromide absorption refrigeration unit to convert the heat in the cold fluid into cold energy and supply it to the outside, and then pass the plate heat exchange and use the concentrate and filtrate in step 4 as the cold fluid to cool down the cooled wastewater, and the temperature of the cooled wastewater is 23°C;

[0032] Step 3. The waste water after the cooling treatment flows through the XDA-1 macroporous adsorption resin packing column, and the waste water after the c...

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PUM

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Abstract

An embodiment of the invention discloses a method for recycling high-temperature acidic zinc-containing wastewater in cellulose fiber production. The method includes: step one, subjecting high-temperature acidic zinc-containing wastewater to filtration treatment; step two, subjecting pretreated wastewater to heat energy recovery; step three, adopting macroporous adsorption resin for adsorptive purification of the wastewater subjected to heat energy recovery; step four, adopting a reverse osmosis membrane for filtration concentration of the adsorbed wastewater to obtain filtrate and concentrated liquid containing sulfuric acid, sodium sulfate and zinc sulfate, and then, recycling the concentrated liquid; using the filtrate as raw water. By the method for recycling, recycling of sulfuric acid, zinc sulfate, sodium sulfate and energy in wastewater can be realized, recycling of soft water is realized as well, recycling economy is realized, and emission of a whole factory is reduced. In addition, the method is simple in operation and low in cost, and economic benefits are remarkably improved by resource recycling.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of wastewater treatment, in particular to a method for recycling high-temperature acidic zinc-containing wastewater in cellulose fiber production. Background technique [0002] Viscose, the full name of viscose fiber, is a cellulose fiber obtained by extracting and remodeling fiber molecules from natural wood cellulose using "wood" as a raw material; the hygroscopicity of viscose fiber is in line with the physiological properties of human skin. Requirements, it has the characteristics of smooth and cool, breathable, antistatic, anti-ultraviolet, bright colors, and good color fastness; it has the essence of cotton and the quality of silk; it is an authentic plant fiber, which is derived from nature and is superior to nature. [0003] At present, China has become the main producer of viscose fiber in the world, but the pollution of the production method is relatively serious; the envi...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F101/10C02F103/38C02F101/20
CPCC02F1/001C02F1/285C02F1/441C02F9/00C02F2101/101C02F2101/20C02F2103/38
Inventor 马杰付涛
Owner 马杰