CN103316863A - Filter deposit cleaning method - Google Patents
Filter deposit cleaning method Download PDFInfo
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- CN103316863A CN103316863A CN2013102882577A CN201310288257A CN103316863A CN 103316863 A CN103316863 A CN 103316863A CN 2013102882577 A CN2013102882577 A CN 2013102882577A CN 201310288257 A CN201310288257 A CN 201310288257A CN 103316863 A CN103316863 A CN 103316863A
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- filter
- ammonium fluoride
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Abstract
The invention discloses a filter deposit cleaning method. After liquid in a filter is discharged completely, prepared saltpeter solution is fed into the filter to clean the filter for 15 minutes in a circulation mode and then is discharged into an original saltpeter solution groove. After the saltpeter solution is discharged completely, prepared ammonium fluoride solution is fed for cleaning. Meanwhile, compressed air is added in a cleaning process. The cleaning time is 10-20 minutes. The ammonium fluoride solution is completely discharged into the original solution groove after cleaning is performed. The filter is cleaned again through clear water. If nitric acid concentration of the cleaning liquid in the cleaning process is lower than 8%, concentrated nitric acid should be added. If ammonium fluoride concentration of the cleaning liquid is lower than 5%, ammonium fluoride should be added. According to the technical scheme, filter efficiency of the filter is greatly improved, the cleaning process is simple, and cost is low.
Description
Technical field
The present invention relates to preventing and kill off of dirt, specifically, is the method that the fouling of phosphorus-containing wastewater production process middle filtrator is cleaned.
Background technology
In the processing procedure of high-density phosphorus, fluoric acid wastewater, adopt secondary lime acid-base neutralization method at present more.Former first grade subsides adopts natural subsidence equipment to process; its sinking speed is slow, sedimentation water quality mixed phenomenon often can occur running owing to operating reason; cause water after the processing not reach the requirement of next workshop section; introduced surface filter production for raising the efficiency the requirement of satisfying lower workshop section; although water quality has reached requirement in process of production; but filter capacity descends after after a while; observe behind the emptying equipment on the filter membrane and produced dirty piece, if its dirty owner's calcium sulfate, calcirm-fluoride, phosphate, silicate etc.Wherein the meetings such as natrium potassium salt class, the calcium silicates hard fouling that the forms hard and compact surface that adheres to filter membrane is difficult for being removed.In order to guarantee again aptitude tests behind the cleaning and regeneration of production capacity.Prior art is to process according to the cleaning way of pipeline in the production process of phosphoric acid, and still there is certain dirty piece in the filter membrane surface after the processing, can't remove.Undesirable through general cleaning after-filter filter effect, filter capacity does not still reach requirement, must again clean after 2～3 days the service time after the regeneration simultaneously, does not accomplish to clean completely through tentatively being judged as filter membrane.Inventor in process of production test of many times and checking has found a kind of comparatively reasonably cleaning method, makes water quality after the filter regeneration not only reach the ability of production requirement, and the time after the regeneration increase to 5～6 days, the same with new filter cloth.
Summary of the invention
The object of the invention is to remedy the deficiencies in the prior art, a kind of filter fouling cleaning method is provided.
The objective of the invention is to be achieved through the following technical solutions: filter fouling cleaning method, it comprises following steps:
(1) the configuration quality percentage concentration is about 8～12% salpeter solution.
(2) the configuration quality percentage concentration is 5～10% ammonium fluoride solutions.
(3) behind emptying filter liquid, first the acid+nitric acid solution that configures is sent into and carried out wash cycles in the filter and enter the orthonitric acid solution tank after 15 minutes.
(4) ammonium fluoride solution for preparing in the emptying rear adding of salpeter solution cleans.In cleaning process, pass into simultaneously compressed air.Scavenging period is 10～20 minutes.Clean rear emptying ammonium fluoride solution and entered the original solution groove, stopped simultaneously passing into compressed air.
(5) using the clear water flush filter once.
(6) be lower than such as concentration of nitric acid in the cleaning fluid in cleaning process
8%Should replenish red fuming nitric acid (RFNA); Ammonium fluoride concentration is lower than in the cleaning fluid
5%Should replenish ammonium fluoride.
Compressed-air actuated pressure needs greater than 0.3Mpa in the above-mentioned steps (4).
Cleaning fluid in the above-mentioned steps (6) in use if there is impurity quality percentage composition greater than 2% the time, need re-start preparation.
Adopt technical scheme of the present invention, greatly improved the filter efficiency of filter, filter filter cloth after the regeneration the same with new filter cloth; And cleaning process is simple, and cost is low.
The specific embodiment
Embodiment
A kind of filter fouling cleaning method, it comprises following steps:
(1) the configuration quality percentage concentration is about 8～12% salpeter solution.
(2) the configuration quality percentage concentration is 5～10% ammonium fluoride solutions.
(3) behind emptying filter liquid, first the acid+nitric acid solution that configures is sent into and carried out wash cycles in the filter and enter the orthonitric acid solution tank after 15 minutes.
(4) ammonium fluoride solution for preparing in the emptying rear adding of salpeter solution cleans.In cleaning process, pass into simultaneously compressed air.Scavenging period is 10～20 minutes.Clean rear emptying ammonium fluoride solution and entered the original solution groove, stopped simultaneously passing into compressed air.
(5) with the clear water flush filter once.
(6) should replenish red fuming nitric acid (RFNA) when the cleaning fluid concentration of nitric acid is lower than 8% in cleaning process; Should replenish ammonium fluoride when ammonium fluoride concentration is lower than 5% in the cleaning fluid.
Compressed-air actuated pressure is 0.5Mpa in the above-mentioned steps (4).
Cleaning fluid in the above-mentioned steps (6) in use if there is impurity content greater than 2% the time, need re-start preparation.
Claims (3)
1. filter fouling cleaning method is characterized in that it comprises following steps:
(1) the configuration quality percentage concentration is about 8～12% salpeter solution;
(2) the configuration quality percentage concentration is 5～10% ammonium fluoride solutions;
(3) behind emptying filter liquid the salpeter solution that configures sent into and carry out wash cycles in the filter, then emptying salpeter solution enters the orthonitric acid solution tank, and scavenging period is 15 minutes;
(4) add the ammonium fluoride solution for preparing and clean, pass into compressed air simultaneously in cleaning process, scavenging period is 10～20 minutes, has cleaned rear emptying ammonium fluoride solution and has entered the original solution groove, stops simultaneously passing into compressed air;
(5) with the clear water flush filter once;
(6) in cleaning process, replenish red fuming nitric acid (RFNA) when concentration of nitric acid is lower than 8% in the cleaning fluid; Replenish ammonium fluoride when ammonium fluoride concentration is lower than 5% in the cleaning fluid.
2. method according to claim 1 is characterized in that compressed-air actuated pressure is greater than 0.3Mpa in the described step (4).
3. method according to claim 1, it is characterized in that in the described step (6) cleaning fluid in use if there is impurity content greater than 2% the time, need re-start preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102882577A CN103316863A (en) | 2013-07-10 | 2013-07-10 | Filter deposit cleaning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102882577A CN103316863A (en) | 2013-07-10 | 2013-07-10 | Filter deposit cleaning method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103316863A true CN103316863A (en) | 2013-09-25 |
Family
ID=49186074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102882577A Pending CN103316863A (en) | 2013-07-10 | 2013-07-10 | Filter deposit cleaning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103316863A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268702A (en) * | 2014-06-26 | 2016-01-27 | 欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构 | Method for cleaning heat exchange surface, and particularly for heat exchange surface in reactor for preparing melamine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069296A (en) * | 1991-08-12 | 1993-02-24 | 刘沣 | The cyclic cleaning method of calcium dirt and scavenging agent |
| CN1346338A (en) * | 1999-04-02 | 2002-04-24 | 株式会社伊奈 | Ceramics product to be used around water and method of antifouling treatment therefor |
| CN1978028A (en) * | 2005-12-09 | 2007-06-13 | 安徽铜都特种环保设备股份有限公司 | On-line washing method of ceramic filter and apparatus therefor |
| CN1978616A (en) * | 2005-12-09 | 2007-06-13 | 安徽铜都特种环保设备股份有限公司 | Detergent for cleaning ceramic filtering plate |
| CN101476128A (en) * | 2008-12-24 | 2009-07-08 | 瓮福（集团）有限责任公司 | Method for descaling phosphoric acid conveying pipeline |
| CN101760353A (en) * | 2009-11-17 | 2010-06-30 | 上海丰信环保科技有限公司 | Composite cleaning agent for cleaning membrane system containing silicon, iron, calcium and magnesium contaminants |
| CN102398993A (en) * | 2010-09-14 | 2012-04-04 | 曹建兵 | Silica scale remover |
| CN102601083A (en) * | 2012-03-20 | 2012-07-25 | 湖南骏泰浆纸有限责任公司 | Washing device of scaling substances on surface of pulp washer and washing method of scaling substances on surface of pulp washer |
| JP2013031839A (en) * | 2011-07-06 | 2013-02-14 | Mitsubishi Rayon Co Ltd | Filtration membrane washing agent and method for washing filtration membrane |
-
2013
- 2013-07-10 CN CN2013102882577A patent/CN103316863A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069296A (en) * | 1991-08-12 | 1993-02-24 | 刘沣 | The cyclic cleaning method of calcium dirt and scavenging agent |
| CN1346338A (en) * | 1999-04-02 | 2002-04-24 | 株式会社伊奈 | Ceramics product to be used around water and method of antifouling treatment therefor |
| CN1978028A (en) * | 2005-12-09 | 2007-06-13 | 安徽铜都特种环保设备股份有限公司 | On-line washing method of ceramic filter and apparatus therefor |
| CN1978616A (en) * | 2005-12-09 | 2007-06-13 | 安徽铜都特种环保设备股份有限公司 | Detergent for cleaning ceramic filtering plate |
| CN101476128A (en) * | 2008-12-24 | 2009-07-08 | 瓮福（集团）有限责任公司 | Method for descaling phosphoric acid conveying pipeline |
| CN101760353A (en) * | 2009-11-17 | 2010-06-30 | 上海丰信环保科技有限公司 | Composite cleaning agent for cleaning membrane system containing silicon, iron, calcium and magnesium contaminants |
| CN102398993A (en) * | 2010-09-14 | 2012-04-04 | 曹建兵 | Silica scale remover |
| JP2013031839A (en) * | 2011-07-06 | 2013-02-14 | Mitsubishi Rayon Co Ltd | Filtration membrane washing agent and method for washing filtration membrane |
| CN102601083A (en) * | 2012-03-20 | 2012-07-25 | 湖南骏泰浆纸有限责任公司 | Washing device of scaling substances on surface of pulp washer and washing method of scaling substances on surface of pulp washer |
Non-Patent Citations (1)
| Title |
|---|
| 徐伟: "空压机热交换器的除垢方法", 《工程机械》, vol. 31, no. 4, 8 January 2004 (2004-01-08), pages 48 - 49 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268702A (en) * | 2014-06-26 | 2016-01-27 | 欧洲技术设于伊特根的三聚氰氨-卢森堡-分支机构 | Method for cleaning heat exchange surface, and particularly for heat exchange surface in reactor for preparing melamine |
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Application publication date: 20130925 |