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Non-detachable chemical washing method for powder resin covered filter element and detergent

A powder resin and chemical cleaning technology, which is applied in chemical instruments and methods, separation methods, and dispersed particle filtration, etc., can solve the problems of filter element fouling and blockage, achieve short cleaning time, safe and efficient removal, and prevent resin leakage.

Inactive Publication Date: 2016-10-12
西安利能科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So as to solve the problem of filter element fouling of the powder resin covered filter, reduce the frequent film laying and the amount of resin powder, fiber powder and demineralized water when the film is burst due to the shortened operation cycle of the powder resin covered filter after cleaning, and achieve energy saving and emission reduction low-cost operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Alkaline washing

[0035] Alkaline detergent is Na 3 PO 4 It is compounded with sodium alkylbenzene sulfonate, the mass ratio is 1:3, the amount of alkaline detergent is 2‰ of the quality of cleaning water, the cleaning water is the condensed water generated when the generator set is running, and the quality of cleaning water is added to the cleaning water 2‰ silicone defoamer, the cleaning temperature is 48°C, the alkali detergent and defoamer are mixed in the powder resin covering filter resin mixing box, after mixing, they are added to the cleaning cycle through the resin injection pump, and the cleaning cycle method After the condensed water is filled, the fine treatment powder resin covers the filter and the membrane laying cycle is carried out, and the cleaning time is 2 hours;

[0036] 2) Rinsing after alkaline washing

[0037] 2.1) Empty the liquid in the filter first, then fill the filter with desalted water by backwashing the filter with powder resin, an...

Embodiment 2

[0049] 1) Alkaline washing

[0050] Alkaline detergent is Na 3 PO 4 Compounded with sodium alkylbenzene sulfonate, the mass ratio is 2:3, the amount of alkaline detergent is 1‰ of the quality of cleaning water, the cleaning water is the condensed water generated when the generator set is running, and the quality of cleaning water is added to the cleaning water 2‰ silicone defoamer, the cleaning temperature is 50°C, the alkali detergent and defoamer are mixed in the resin mixing box covering the filter with powder resin, and then added to the cleaning cycle through the resin injection pump after mixing, the cleaning cycle method After the condensed water is filled, the fine treatment powder resin covers the filter and the membrane laying cycle is carried out, and the cleaning time is 1 hour;

[0051] 2) Rinsing after alkaline washing

[0052] 2.1) First empty the liquid in the filter, then fill the filter with desalted water by backwashing the filter with powder resin, and t...

Embodiment 3

[0064] 1) Alkaline washing

[0065] The alkaline cleaning agent is sodium alkylbenzene sulfonate, and the amount of alkaline cleaning agent is 3‰ of the quality of the cleaning water. The cleaning water is the condensed water generated during the operation of the generator set. The cleaning water is also added with organic silicon with a quality of cleaning water of 3‰. Defoamer, the cleaning temperature is 53°C, alkali detergent and defoamer are mixed in the resin mixing box covering the filter with powder resin, after mixing, they are added to the cleaning cycle through the resin injection pump, and the cleaning cycle is filled with condensed water Carry out the fine treatment powder resin covering filter membrane laying cycle, the cleaning time is 2 hours;

[0066] 2) Rinsing after alkaline washing

[0067] 2.1) Empty the liquid in the filter first, then fill the filter with desalted water by backwashing the filter with powder resin, and then carry out the fine treatment o...

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Abstract

The invention provides a non-detachable chemical washing method for a powder resin covered filter element and a detergent. The method comprises the following steps: covering a system of a filter by using powder resin, and performing alkali washing, rinsing after alkali washing, pickling, acid liquid replacement and rinsing after the pickling on a filter element in the powder resin covered filter by using condensed water, desalted water and a washing reagent, wherein the filter element is not dismantled from a tank body in washing. The washing reagent mainly contains alkaline detergent, a pickling agent, a defoaming agent, a reducing agent, a corrosion inhibitor and a waste liquid treatment agent. By adopting the non-detachable chemical washing method and the detergent, contaminants on the filter element can be safely and efficiently cleaned. The operation period of the powder resin covered filter after being washed can be restored to an optimum state, and frequent diaphragm pavement, consumption of resin powder and fiber powder when the diaphragm is broken and consumption of the desalted water caused by the short period can be reduced, and a purpose of energy-saving emission-reducing low-cost operation can be realized. The problem of resin leakage caused by the installation problem when the filter element is dismantled can be avoided; and moreover, the washing time is short, and the normal operation of a set is not influenced.

Description

technical field [0001] The invention belongs to the technical field of chemical cleaning of thermal power plant equipment, in particular to a chemical cleaning method and a cleaning agent for a powder resin-covered filter element of a thermal power plant finishing system without disassembly. Background technique [0002] The fine treatment of direct air-cooled units in thermal power plants generally uses powder resin to cover the filter. The direct air-cooled unit has a large heat transfer surface area in contact with water vapor, and the condensed water has a high oxygen content and a high content of iron corrosion products. During the water vapor cycle, the corrosion products in the condensed water are mostly iron oxides. Due to load changes during operation, the corrosion products in the steam water pipeline will fall off and the content of metal oxides will increase. Therefore, in the perennial operation, the filter element of the filter will also be blocked. Most of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/00B01D65/06
CPCB01D65/02B01D2321/164B01D2321/162B01D46/80
Inventor 刘英旭石涛孔永利
Owner 西安利能科技有限责任公司
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