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Cleaning process of alkali liquor desalter

A desalination device and process technology, which is applied in the field of lye desalination device cleaning process, can solve the problems of high labor intensity, complex cleaning process, low membrane flux recovery, etc., to reduce labor intensity, simple cleaning process, and improve cleaning effect Effect

Inactive Publication Date: 2020-04-10
YIBIN HIEST FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing technologies represented by the above patent documents all have the problems of complex cleaning process and high labor intensity, and the cleaning efficiency is low, the cleaning effect is poor, and the membrane flux recovery is low.

Method used

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  • Cleaning process of alkali liquor desalter
  • Cleaning process of alkali liquor desalter
  • Cleaning process of alkali liquor desalter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A cleaning process for an alkali desalination device, comprising the following steps:

[0034] a. After the desalination device is in operation, when the pressure rises to the set value of the cleaning process, it starts to stop for cleaning;

[0035] b. Fill the cleaning tank with demineralized water first, and eject the residual materials in the desalination device after parking;

[0036] c. Then fill the cleaning tank with demineralized water, heat it up to 45°C by passing in steam, and carry out circular cleaning for 1.5 hours.

Embodiment 2

[0038] A cleaning process for an alkali desalination device, comprising the following steps:

[0039] a. After the desalination device is in operation, when the pressure rises to the set value of the cleaning process, it starts to stop for cleaning;

[0040] b. Fill the cleaning tank with demineralized water first, and eject the residual materials in the desalination device after parking;

[0041] c. Then fill the cleaning tank with demineralized water, heat it up to 47°C by passing in steam, and carry out circular cleaning for 1.6 hours.

Embodiment 3

[0043] A cleaning process for an alkali desalination device, comprising the following steps:

[0044] a. After the desalination device is in operation, when the pressure rises to the set value of the cleaning process, it starts to stop for cleaning;

[0045] b. Fill the cleaning tank with demineralized water first, and eject the residual materials in the desalination device after parking;

[0046] c. Then fill the cleaning tank with demineralized water, heat it up to 49°C with steam, and carry out circular cleaning for 1.7 hours.

[0047] In step c, the desalinated water temperature of the circular cleaning is 49° C., and the circular cleaning time is 1.7 h. Specifically, at this temperature and the circular cleaning time, the cleaning effect and the membrane flux recovery rate are excellent.

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Abstract

The invention discloses a cleaning process of an alkali liquor desalter and belongs to the technical field of chemical separation. The process is characterized by comprising the following steps of: a,after the desalter runs, the pressure rises to a set value of the cleaning process, a machine is stopped for cleaning; b, firstly, a cleaning tank is filled with desalted water, and residual materials in the desalting device are ejected out after the machine is stopped; and c, the cleaning tank is filled with desalted water, steam is introduced to raise the temperature to 45-50 DEG C, and cycliccleaning is conducted for 1.5-2 h. The cleaning process is simple, the labor intensity of personnel is greatly reduced, the cleaning efficiency and the cleaning effect are improved, the cleaning watercost is saved, and the membrane flux recovery rate is increased.

Description

technical field [0001] The invention relates to the technical field of chemical separation, in particular to a cleaning process for an alkali desalination device. Background technique [0002] The lye produced from viscose wastewater contains a small amount of sodium sulfate, which prevents the lye from being used in processes that require high lye quality. In order to fully utilize the lye, it is necessary to control the process parameters , using a separation device for desalination to obtain high-quality lye. [0003] After the desalination device runs for a period of time, the operating pressure of the desalination device gradually increases, and the flux gradually decreases. Cleaning is required to reduce the operating pressure of the membrane, restore the flux of the desalination device, and prolong the service life of the desalination device. Due to the high cleanliness of the lye, the flow channel of the desalination device is not easy to block, mainly due to the ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02B01D61/10B01D61/02C01D5/16
CPCB01D61/027B01D61/10B01D65/02B01D2321/08C01D5/16Y02A20/131Y02A20/144
Inventor 卢伟罗柱均牟朝冰刘洪
Owner YIBIN HIEST FIBER
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