Method and equipment for comprehensive treatment of waste water and waste gas in viscose fiber preparation

A viscose fiber and comprehensive treatment technology, which is applied in the field of waste water and waste gas treatment in viscose fiber production, to achieve the effects of reducing emissions, reducing hydrogen sulfide and carbon disulfide emissions, and reducing pollution

Inactive Publication Date: 2009-01-14
YIBIN HIEST FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention comprehensively considers the problems of waste alkali treatment, waste gas treatment and zinc-containing wastewater treatment, not only achieves comprehensive utili...

Method used

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  • Method and equipment for comprehensive treatment of waste water and waste gas in viscose fiber preparation
  • Method and equipment for comprehensive treatment of waste water and waste gas in viscose fiber preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A. Collect the waste lye from the raw hydraulic pressing process in viscose fiber production, filter out cellulose and hemicellulose, and enter the absorption tank from the top in the form of jet flow.

[0062] B. The process waste gas containing hydrogen sulfide and carbon disulfide is sent from the air duct to the absorption tank through the fan and enters in the form of ring pipe aeration. The alkali concentration of the lye absorption liquid is 150 g / liter, and the gas-liquid ratio is 100:1 / minutes (that is, the lye spray speed is 1.67m 3 / min, the insufficient part is supplemented by reflux lye).

[0063] C. The hydrogen sulfide concentration in the process waste gas is 70g / m 3 , carbon disulfide concentration 6.4g / m 3 The spent alkali and exhaust gas are fully mixed in the absorption tank to make a neutralizing liquid, the hydrogen sulfide in it reacts with the sodium hydroxide in the spent alkali to form sodium sulfide or sodium hydrogen sulfide dissolved in t...

Embodiment 2

[0068] A. Collect the waste lye from the raw hydraulic pressing process in viscose fiber production, filter out cellulose and hemicellulose, and enter the absorption tank from the top in the form of jet flow.

[0069] B. The process waste gas containing hydrogen sulfide and carbon disulfide is sent from the air duct to the absorption tank through the fan and enters in the form of ring pipe aeration. The alkali concentration of the lye absorption liquid is 180 g / liter, and the gas-liquid ratio is 100:1 / minutes (that is, the lye spray speed is 1.67m 3 / min, the insufficient part is supplemented by reflux lye).

[0070] C. The concentration of hydrogen sulfide in the process waste gas is 75g / m 3 , carbon disulfide concentration 7g / m 3 The spent alkali and exhaust gas are fully mixed in the absorption tank to make a neutralizing liquid, the hydrogen sulfide in it reacts with the sodium hydroxide in the spent alkali to form sodium sulfide or sodium hydrogen sulfide dissolved in ...

Embodiment 3

[0075] A. Collect the waste lye from the raw hydraulic pressing process in viscose fiber production, filter out cellulose and hemicellulose, and enter the absorption tank from the top in the form of jet flow.

[0076] B. The process waste gas containing hydrogen sulfide and carbon disulfide is sent from the air duct to the absorption tank through the fan and enters in the form of ring pipe aeration. The alkali concentration of the lye absorption liquid is 200 g / liter, and the gas-liquid ratio is 100:1 / minutes (that is, the lye spray speed is 1.67m 3 / min, the insufficient part is supplemented by reflux lye).

[0077] C. The hydrogen sulfide concentration in the process waste gas is 70g / m 3 , carbon disulfide concentration 7g / m 3 The spent alkali and exhaust gas are fully mixed in the absorption tank to make a neutralizing liquid, the hydrogen sulfide in it reacts with the sodium hydroxide in the spent alkali to form sodium sulfide or sodium hydrogen sulfide dissolved in the...

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Abstract

The invention discloses a method for comprehensively treating wastewater and waste gas in the viscose fiber production as well as a device thereof, aiming at solving the difficult problem of waste gas and wastewater treatment in the viscose fiber production. The method comprises the steps of: putting the waste lye collected in the viscose fiber production into an absorption tank; inputting the process waste gas containing sulfureted hydrogen and carbon bisulfide into the absorption tank, and colleting the absorbed neutralizer for standby; and putting the neutralizer into the wastewater containing zinc ions for having the reaction with the zinc ions, and removing the precipitate after reaction products are deposited. The device comprises the absorption tank, a collecting tank, a neutralization pond and a sedimentation tank. The method and device comprehensively consider the problems of spent soda, waste gas and zinc-containing wastewater treatment in the viscose fiber production, thereby reaching the comprehensive utilization of resources, also reducing the waste discharge, and solving the environmental protection problem that restricts the industry development over a long period of time in the viscose production process.

Description

technical field [0001] The invention belongs to the field of wastewater and waste gas treatment in viscose fiber production. Background technique [0002] In the production of viscose fiber, a large amount of chemical raw materials are used: caustic soda, carbon disulfide and zinc sulfate, and a large amount of waste alkali is produced at the same time, about 90% of carbon disulfide is converted into hydrogen sulfide and carbon disulfide waste gas enters the main exhaust tower, and the rest is discharged through Or discharge into water bodies; zinc sulfate and lye also partly discharge into water bodies. During the wastewater treatment, the pH value of the wastewater is adjusted to make the zinc ions in the water precipitate naturally, and the treatment effect is unstable. The treatment of the waste lye produced in the raw hydraulic pressing process is generally carried out or directly used for pH adjustment of sewage treatment, which is not very effective. [0003] Proces...

Claims

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Application Information

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IPC IPC(8): C02F9/04B01D53/50B01D53/52
Inventor 徐绍贤邓传东鄢勇气瞿继丹张丽娟雷湘温树朝张扬
Owner YIBIN HIEST FIBER
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