Filter backwashing method and filter

A filter and backwashing technology, applied in gravity filters, chemical instruments and methods, loose filter material filters, etc., can solve problems such as low backwashing efficiency, save energy, reduce water washing intensity, improve The effect of interception capacity

Inactive Publication Date: 2015-03-25
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Embodiments of the present invention provide a filter backwashing method and

Method used

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  • Filter backwashing method and filter
  • Filter backwashing method and filter
  • Filter backwashing method and filter

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0122] Example one

[0123] In this embodiment, the method is applied to a quartz sand filter to introduce the backwashing method. The structure of the quartz sand filter is as figure 1 As shown, after the drain valve 15a is opened, the water in the filter is discharged into the sludge adjustment tank; the inlet valve 14a is opened so that the water from the pump enters the top of the filter layer, and the filter filters it; The water outlet valve 11a is opened and the water filtered by the filter flows into the cooling tower for cooling, which is used to provide water for steel rolling; the backwash water of the backwash water inlet pipe 12 comes from the water inlet pipe 14, and the backwash water inlet valve 12a is opened to let the backwash water flow in The bottom of the filter layer is backwashed with water; after the air washing valve 16a is opened, the blower 17 is used to blow compressed air into the bottom of the filter layer for air backwashing.

[0124] Please refer to ...

Example Embodiment

[0134] Example two

[0135] In this embodiment, this method is applied to figure 1 The illustrated quartz sand filter is taken as an example to introduce the monitoring process of the various components of the quartz sand filter during the implementation of the method.

[0136] Please refer to Image 6 , The monitoring process includes the following steps:

[0137] Step S601: Detect whether there is a backwash requirement, if the result is yes, skip to step S602; if the result is no, skip to step S601a;

[0138] Step S602: Check whether it is ready, and if the result is yes, skip to step S603;

[0139] Step S603: Judge whether it is manual, if the judgement result is yes, jump to step S603a; if judge the structure is no, jump to step S604;

[0140] Step S603a: perform manual backwashing, and jump to step S603b;

[0141] Step S603b: Determine that the automatic backwashing is not completed;

[0142] Step S604: judge whether to stop automatic hand washing, if the judgment result is yes, skip...

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PUM

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Abstract

An embodiment of the invention provides a filter backwashing method and a filter. The method is applied to the filter. The filter comprises a tank, a water outlet pipe connected to the tank, a water outlet valve arranged on the water outlet pipe, a backwashing water inlet pipe, a backwashing water inlet valve arranged on the backwashing water inlet pipe, a backwashing valve connected to the backwashing water inlet pipe, a water suction pump connected to the backwashing valve, a water inlet pipe, a water inlet valve arranged on the water inlet pipe, a water discharge pipe, a water discharge valve arranged on the water discharge pipe, an air inlet pipe with one end connected to the tank and the other end connected to an air blower, as well as an air washing valve arranged on the air inlet pipe. The method comprises steps as follows: controlling the backwashing water inlet valve in an open state; controlling the air blower in an open state to input compressed air into the tank through the air inlet pipe; and guiding water into the tank through the water inlet pipe, and further performing backwashing on a filter material in the tank in an air and water mixed manner.

Description

technical field [0001] The invention relates to the field of automatic control, and discloses a filter backwashing method and the filter. Background technique [0002] As an effective technical equipment to remove residual insoluble impurities in water, filters have been widely used in industrial water treatment systems. After the filter is used for a period of time, the filter medium will be polluted and agglomerated by suspended solids, sludge, colloids and other impurities in the water, which will greatly reduce the filtering effect of the filter. Therefore, the filter must be backwashed regularly. Restores the filtering ability of the filter. [0003] Traditional filter backwashing methods are divided into the following three types: [0004] The first is the air backwashing method. In this method, the filter layer does not expand during backwashing, and the removal of impurities absorbed by the filter layer depends on the shearing and friction of the filter particles w...

Claims

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Application Information

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IPC IPC(8): B01D24/46B01D24/48
Inventor 钟妍张东明汪洋汪洪曹凯傅爱玲
Owner 武汉钢铁有限公司
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