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A filter backwashing method and filter

A filter and backwashing technology, which is applied to gravity filters, chemical instruments and methods, and loose filter material filters, etc., can solve the problems of low backwashing efficiency, save energy, improve backwashing efficiency, and strengthen The effect of potency

Inactive Publication Date: 2016-12-07
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 filter to solve the technical problem of low backwashing efficiency in the prior art

Method used

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  • A filter backwashing method and filter
  • A filter backwashing method and filter
  • A filter backwashing method and filter

Examples

Experimental program
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Effect test

Embodiment 1

[0123] In this embodiment, the backwashing method is introduced by applying the method to a quartz sand filter, and the quartz sand filter has a structure such as figure 1 As shown, wherein, after the drain valve 15a is opened, the water in the filter is discharged into the sludge adjustment tank; the water inlet valve 14a is opened to allow the water from the suction pump to enter 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 rolling steel; Water backwashing is carried out at the bottom of the filter layer; 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 Figure 5 , the backwashing method in the present embodiment comprises the following steps:

[0125] Step S501: When the measured flow value of ...

Embodiment 2

[0135] In this example, this method is applied to figure 1 The quartz sand filter shown is taken as an example to introduce the monitoring process of each component 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 need for backwashing, if the result is yes, go to step S602; if the result is no, go to step S601a;

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

[0139] Step S603: Judging whether it is manual, if the judging result is yes, go to step S603a; if judging structure is no, go to step S604;

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

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

[0142] Step S604: Judging whether to stop automatic hand washing, if the judgment result is yes, go to step S604a; if the judgment...

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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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Patent Type & Authority Patents(China)
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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