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Filter backwashing system and process, control method

A filter and process technology, which is applied in the filter backwashing system and process and control field, can solve the problems of economic loss, cleanness, organic matter and microorganisms, etc., so as to improve the backwashing effect, reduce the number of backwashing, The effect of extending the service life

Pending Publication Date: 2021-10-08
XIAN THERMAL POWER RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing filter backwashing process does not achieve the purpose of thoroughly cleaning the organic matter and microorganisms in the filter material, and reduces the filter cycle of the filter under the same operating conditions. The normal operation of the device, but also bring certain economic losses

Method used

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  • Filter backwashing system and process, control method

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Embodiment Construction

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0034] refer to figure 1 , the filter backwash process of the present invention comprises the following steps:

[0035] Step 1) Filter outage: When the filter reaches the backwashing condition (that is, the pressure difference between the inlet and outlet of the filter reaches 0.05MPa), close the filter inlet valve 1 and outlet valve 4, and turn to the next filter after the filter is out of service. step sequence.

[0036] Step 2) Hydraulic backwashing: open the filter backwashing water inlet valve 3 and backwashing drain valve 2, start the filter backwashing water pump 11, backwashing time is 5 minutes, and the backwashing water is directly discharged to the recovery pool. After the sequence time reaches the set time, it will transfer to the next sequence.

[0037] Step 3) Drainage: Stop filter backwash pump 11, close filter backwash inlet valve 3 and bac...

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Abstract

The invention discloses a filter backwashing system and process and a control method. The filter backwashing system comprises a filter backwashing water inlet valve, a filter backwashing water discharge valve, a filter backwashing water inlet valve, a filter water outlet valve, a filter air inlet valve and a filter forward washing water discharge valve which are arranged on a filter, wherein the filter backwashing water inlet valve is connected with a water inlet pipeline, the filter backwashing water discharge valve and the filter forward washing water discharge valve are connected with a recovery water tank through pipelines, the filter backwashing water inlet valve is connected with a filter backwashing water pump through a pipeline, the filter air inlet valve is connected with a backwashing Roots blower through a pipeline, the filter water outlet valve is used for producing water through a water production pipeline, the top of the filter is connected with a filter exhaust valve through a pipeline, and a liquid level switch is arranged at the tail end of the filter exhaust valve. According to the invention, organic matters and microorganisms in a filter material can be effectively removed, the backwashing effect of the filter is improved, the backwashing frequency of the filter is reduced, and the service life of the filter material of the filter is prolonged.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a filter backwashing system, process and control method. Background technique [0002] Filters are widely used in power plant water treatment systems to remove suspended solids, organic matter and microorganisms in water to further improve the quality of incoming water. At present, the filter backwashing process is basically composed of three steps: hydraulic backwashing, pneumatic backwashing and gas-water combined washing. Some filter backwashing processes do not even have a pneumatic backwashing step. However, the existing filter backwashing process does not achieve the purpose of thoroughly cleaning the organic matter and microorganisms in the filter material, and reduces the filter cycle of the filter under the same operating conditions. The normal operation of the device, but also bring certain economic losses. Contents of the invention [0003] In order to over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D35/143B01D35/16A61L2/18
CPCB01D35/143B01D35/16A61L2/18
Inventor 郭云飞谭祥帅陈余土杨搏杨科李昭李长海廖军林刘辉王美良牛佩王启超
Owner XIAN THERMAL POWER RES INST CO LTD
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