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Tanning technique for filtering dyeing circulation wastewater at regular time

A waste water and technology technology, applied in dyeing, textile and papermaking, etc., can solve problems such as environmental pollution, reduce operating costs, reduce labor intensity, and reduce the generation of waste solids.

Inactive Publication Date: 2014-08-27
张壮斗
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention: to realize a tanning technology for regularly filtering dyeing and circulating wastewater, which basically solves the problem of environmental pollution during the dyeing process, and the various performance indicators of the crust leather produced thereby meet the requirements

Method used

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  • Tanning technique for filtering dyeing circulation wastewater at regular time

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Embodiment

[0014] In the dyeing process, the dyeing wastewater is discharged into the dyeing wastewater pool, stirred evenly, and then input to the dyeing drum by an acid and alkali resistant pump. to 30°C, 1.5% compound fatliquor, turn for 20 minutes; 4.0% dicyandiamide retanning agent, 1.5% wattle extract, 2.0% sulfited vegetable oil, turn for 40 minutes; 2.0% dye, 0.5 % dispersant, turn for 60 minutes; 2.5% acrylic acid retanning agent, turn for 30 minutes; make up waste liquid 120%, 1.2% baking soda, temperature 45 ℃, turn for 10 minutes; 1.0% formic acid, turn for 30 minutes; into the waste water pool; then proceed to the next process.

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Abstract

The invention provides a tanning technique for filtering dyeing circulation wastewater at regular time. The tanning technique is characterized in that the wastewater is circulated and reused in a dyeing procedure, the wastewater after each dyeing procedure is completed is collected for dyeing of a next batch of leather, and the waste solid needs to be filtered after the wastewater is circulated for 20-60 times or after 20-70 days. Complex procedures such as filtration and residue filtration are eliminated, so that not only is the working intensity of operators alleviated, but also the operation cost is lowered, the production of waste solid is reduced, and meanwhile, various property indexes of produced crust leather can all meet the requirements.

Description

technical field [0001] The invention relates to the field of recycling and reuse of dyeing wastewater in the leather industry. Background technique [0002] In the tanning and dyeing process, wastewater recycling technology has been realized, but the wastewater treatment process is relatively complicated, resulting in poor process stability, such as filtration, filter residue and other procedures, which not only increase the labor intensity of workers, but also high operating costs. Contents of the invention [0003] The purpose of the present invention is to realize a tanning technology for regularly filtering dyeing and circulating waste water, which basically solves the problem of environmental pollution during the dyeing process, and the various performance indicators of the crust leather produced thereby meet the requirements. [0004] Technical scheme of the present invention is as follows: [0005] A tanning technique for regularly filtering dyeing circulating wast...

Claims

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Application Information

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IPC IPC(8): D06P3/32
Inventor 张壮斗
Owner 张壮斗