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A method for deep recovery of lye in viscose fiber production

A viscose fiber and lye technology, applied in the field of viscose fiber lye recovery, can solve the problems of insufficient lye recovery, waste of lye and flushing water, and reduce the consumption of flushing water, so as to reduce labor costs and reduce Effects of treatment cost and emission reduction

Active Publication Date: 2020-04-03
YIBIN GRACE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of insufficient lye recovery in the prior art, resulting in waste of lye and flushing water, and provides a method for deep recovery of lye in viscose fiber production, which can greatly reduce the amount of flushing water used , and fully recover the inside of the filter, especially the lye attached to the filter

Method used

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  • A method for deep recovery of lye in viscose fiber production
  • A method for deep recovery of lye in viscose fiber production

Examples

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Embodiment 1

[0027] A method for deep recovery of lye in viscose fiber production, comprising the following process steps:

[0028] A. Set the plate and frame filter viscose inlet pipe 2 and the plate and frame filter viscose outlet pipe 3 on the plate and frame filter 1; connect and set the plate and frame filter alkali on the plate and frame filter viscose outlet pipe 3 The liquid inlet pipe 4 is communicated with the plate and frame filter lye outlet pipe 5 on the viscose inlet pipe 2 of the plate and frame filter;

[0029] B, on the KKF filter 6, the KKF filter viscose inlet pipe 7 and the KKF filter viscose outlet pipe 8 are set; on the KKF filter viscose outlet pipe 8, No. 1 lye pipe 9 is connected and set, The KKF filter viscose inlet pipe 7 is communicated with No. 2 lye pipe 10;

[0030] C. After the viscose is filtered, the residual lye in the filter is reclaimed by flushing lye; the flushing lye is input from the lye inlet pipe 4 of the plate and frame filter, and the lye is re...

Embodiment 2

[0033] A method for deep recovery of lye in viscose fiber production, comprising the following process steps:

[0034] A. Plate and frame filter viscose inlet pipe 2 and plate and frame filter viscose outlet pipe 3 are arranged on plate and frame filter 1; The liquid inlet pipe 4 is communicated with the plate and frame filter lye outlet pipe 5 on the viscose inlet pipe 2 of the plate and frame filter;

[0035] B, on the KKF filter 6, the KKF filter viscose inlet pipe 7 and the KKF filter viscose outlet pipe 8 are set; on the KKF filter viscose outlet pipe 8, No. lye pipe 9 is connected and set, The KKF filter viscose inlet pipe 7 is communicated with No. 2 lye pipe 10;

[0036] C, after the viscose is filtered, the residual lye in the filter is reclaimed by flushing lye; The frame filter lye outlet pipe 5 flows out; the flushing lye is input from the No. 1 lye pipe 9, and flows out from the No. 2 lye pipe 10 after flushing and recovery, or the flushing lye is discharged fro...

Embodiment 3

[0042]A method for deep recovery of lye in viscose fiber production, comprising the following process steps:

[0043] A. Plate and frame filter viscose inlet pipe 2 and plate and frame filter viscose outlet pipe 3 are arranged on plate and frame filter 1; The liquid inlet pipe 4 is communicated with the plate and frame filter lye outlet pipe 5 on the viscose inlet pipe 2 of the plate and frame filter;

[0044] B, on the KKF filter 6, the KKF filter viscose inlet pipe 7 and the KKF filter viscose outlet pipe 8 are set; on the KKF filter viscose outlet pipe 8, No. lye pipe 9 is connected and set, The KKF filter viscose inlet pipe 7 is communicated with No. 2 lye pipe 10;

[0045] C, after the viscose is filtered, the residual lye in the filter is reclaimed by flushing lye; The frame filter lye outlet pipe 5 flows out; the flushing lye is input from the No. 1 lye pipe 9, and flows out from the No. 2 lye pipe 10 after flushing and recovery, or the flushing lye is discharged from...

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Abstract

The invention relates to a method for deeply recovering an alkali liquor in viscose fiber production. The method belongs to the technical field of viscose fiber alkali liquor recovery. According to the method provided by the invention, after a washing alkali liquor is adopted for recovering impurities in a cavity of a filtering machine, the consumption of production water for washing the filteringmachine is greatly reduced, the alkali liquor difficult to flow and containing a large number of impurities in the cavity of the filtering machine is recycled, the emission of metal Na<+> ions is reduced, the downstream environment protection treatment cost is reduced, and the environment pollution is reduced. According to the method provided by the invention, aiming at a washing alkali liquor recovery method, structures of two filtering machines are improved, so that without influencing the filtration of viscose, forward washing and backward washing can be realized, and residual alkali liquor in the filtering machine can be thoroughly recycled.

Description

technical field [0001] The invention relates to a method for recovering waste liquid, more specifically, the invention relates to a method for deeply recovering lye in viscose fiber production, and belongs to the technical field of lye recovery for viscose fiber. Background technique [0002] In the production process of viscose fiber, the viscose filtration system is one of the essential production links, and waste water will inevitably be generated during the filtration process. Wastewater contains a large amount of lye, which will be wasted with the discharge of waste water. In order to reduce the discharge of lye and reduce costs, it is necessary for viscose manufacturers to recycle the lye in waste water. [0003] At present, viscose preparation enterprises generally use a combination of plate and frame filter and KKF filter for viscose filtration, but whether it is a plate and frame filter or a KKF filter, it must be disassembled and washed and the filter screen replac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D36/02
CPCB01D36/02
Inventor 李殿洪胡小东黄艺黄龙彬陈建伟庞拥军
Owner YIBIN GRACE