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Negative pressure back-flushing equipment for pretreatment of seawater desalination and its back-flushing method

A backwashing and pretreatment technology, which is applied in chemical instruments and methods, permeation/dialysis water/sewage treatment, separation methods, etc., can solve the problems of heavy maintenance workload and low service life

Inactive Publication Date: 2003-09-24
周建辉
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide the field with a negative pressure backwashing device for seawater desalination pretreatment, so as to solve the problems that the membrane module is affected by unfavorable factors, resulting in low service life and large maintenance workload

Method used

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  • Negative pressure back-flushing equipment for pretreatment of seawater desalination and its back-flushing method
  • Negative pressure back-flushing equipment for pretreatment of seawater desalination and its back-flushing method

Examples

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Embodiment Construction

[0008] Take the whole process of seawater in the negative pressure backwashing device as an example. The water diversion pump is started, and the seawater is delivered to the one-way valve 3 through the pipeline, and enters the multimedia filter 4. The seawater is processed through the multi-media filter, enters the next technological process from the lower water outlet, and enters the container 15 through the throttle valve 14 at the same time. After a certain integral action, the pressure in the container is balanced with the water outlet pressure. When the device orders the high-pressure pump 10 to stop running, the upper end pressure in the super filter 6 and the multi-media filter 4 loses pressure immediately, while the pressure at the water outlet and the pressure in the container do not change instantly and the running direction changes, causing the multi-media filter The pressure at the upper end of the multimedia filter is superimposed, and the dirt flows into the c...

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Abstract

The present invention relates to a negative pressure bakcflushing equipment for seawater desalination pretreatment in the seawater desalination equipment field and its backflushing method. Its designis characterized by that on the pipeline of upper portion of multimedia filter a bloow-down valve is connected, and two non-relurn valve are connected on the pipeline of its middle portion, and a throttling valve is connected on the pipeline of its lower portion, and the above-mentioned all the valves are connected with a container whose outlet is connected with an air filter, and the pipeline connected with the lower portion of the multimedia filter is communicated with a super-filter whose front end is equipped with a jetter and a high-pressure pump which are connected with pipeline.

Description

Technical field [0001] The invention relates to the field of seawater desalination equipment. Background technique [0002] At present, membrane modules, one of the key components of known seawater desalination equipment, are affected by various factors such as different flushing pressures and seawater quality in different sea areas, resulting in high maintenance rates of membrane modules, which directly affect the service life of membrane modules and the quality of qualified fresh water. Water quality and quantity of effluent. Contents of the invention [0003] The purpose of the present invention is to provide the field with a negative pressure backwashing device for seawater desalination pretreatment, so as to solve the problems of low service life and heavy maintenance workload caused by membrane modules affected by unfavorable factors. The design scheme is to use the backflush water pressure at the outlet of the membrane module and the moment when the high-pressure p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/66C02F1/44
CPCY02A20/131
Inventor 胡贤郎周建辉
Owner 周建辉
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