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Backwash control method of metal membrane filter in byd reactor

A technology of metal membrane filter and control method, which is applied in the direction of gravity filter, chemical instrument and method, fixed filter element filter, etc. It can solve the problems of poor use effect and inability to meet the backwash of metal membrane filter, and achieve the best effect Good, reduce the number of parking maintenance, strong applicability

Active Publication Date: 2020-12-08
SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the backwashing method using the cloth bag filter has poor effect on the metal membrane filter and cannot meet the needs of the backwashing of the metal membrane filter.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] The backwash pressure of the metal membrane filter is set to 450kPa, the liquid level drop of the backwash tank is set to 20%, the backwash procedure is set at an interval of 45s, and the backwash time is set to 5s.

[0015] The crude BYD filtrate extracted from the BYD reactor is used as the backwash liquid, which is pumped into the backwash liquid tank to establish the liquid level, and the backwash liquid tank relies on nitrogen to provide dry cleaning power. After starting the control program, check and reset all flushing valves, backwashing valves, and timers, and start the detection program. After the pressure reaches the set pressure of 450kPa, start the backwashing program for the first metal filter, and the flushing valve is closed. , The backwash valve is opened, the backwash hydraulic pressure enters the metal membrane filter, the crude BYD filtrate is flushed into the metal membrane, the backwash liquid is flushed from the inside to the outside by the pressur...

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PUM

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Abstract

The invention relates to a BYD reactor metal film filter reverse flushing control method, and belongs to the field of chemical engineering. The method comprises the following steps of (1) singly performing reverse flushing on 26 metal film filters; maintaining the continuity; (2) using the reverse flushing flow rate as the main parameter and using the time and the pressure as the auxiliary parameters; (3) singly setting the revere flushing liquid quantity; (4) judging the reverse flushing condition through the time; (5) drawing an independent metal film filter film reverse washing control flowchart; realizing the display and record of parameters of the reverse flushing time, the reverse flushing liquid quantity and the like. Compared with the original control method of the filter bag filter, the method has the advantages that the reverse flushing effect is good; the applicability is higher; the machine halt overhaul times of the device due to filter problems can be reduced; the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a backwashing control method of a metal membrane filter of a BYD reactor. Background technique [0002] The 1,4-butynediol (BYD) produced by the acetylene method is produced by the reaction of acetylene and formaldehyde in the presence of Cu-Bi catalyst at 98kPa and 80-95°C. The BYD reactor is equipped with 26 filter bag filters. The generated BYD solution is extracted through the filter bag, and the catalyst is retained in the BYD reactor through the filter bag to continue to participate in the reaction. Due to the extraction, the catalyst filter cake layer is formed on the surface of the filter bag. During the operation of the device, it is necessary to backwash the 26 filters one by one according to the time setting to ensure that the catalyst filter cake layer on the filter bag surface is blown back into the solution and continues to be suspended. The s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D29/60B01D29/66B01D29/50B01D29/31
CPCB01D29/31B01D29/50B01D29/60B01D29/603B01D29/606B01D29/66
Inventor 张娜黄继强康显金枫边胜利
Owner SINOPEC CHANGCHENG ENERGY CHEM NINGXIA CO LTD
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