CN102327741A - Method for cleaning inorganic salt precipitates on ultrafiltration membrane - Google Patents

Method for cleaning inorganic salt precipitates on ultrafiltration membrane Download PDF

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Publication number
CN102327741A
CN102327741A CN201110197115A CN201110197115A CN102327741A CN 102327741 A CN102327741 A CN 102327741A CN 201110197115 A CN201110197115 A CN 201110197115A CN 201110197115 A CN201110197115 A CN 201110197115A CN 102327741 A CN102327741 A CN 102327741A
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China
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cleaning
water
milipore filter
minutes
cleaning case
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CN201110197115A
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Chinese (zh)
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CN102327741B (en
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支建明
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太仓市金鹿电镀有限公司
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Publication of CN102327741A publication Critical patent/CN102327741A/en
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Abstract

The invention discloses a method for cleaning inorganic salt precipitates on an ultrafiltration membrane. The method comprises the following steps of: (1) infiltrating product water into from a cleaning tank to the ultrafiltration membrane by using a cleaning pump and washing; (2) preparing a cleaning solution; (3) pumping the cleaning solution into the ultrafiltration membrane by using the cleaning pump and circularly cleaning and soaking; (4) after soaking is finished, draining the cleaning solution in the cleaning tank, and washing the cleaning tank by using the product water, and after the cleaning tank is cleaned completely, flushing the product water again; (5) pumping the product water into the ultrafiltration membrane by using the cleaning pump and discharging and washing; (6) performing back wash on the ultrafiltration membrane by the product water in the cleaning tank by using a back wash pump; and (7) running an ultrafiltration system provided with the ultrafiltration membrane in the state that a product water drain valve is opened until the product water flowing out is clean. The ultrafiltration membrane is cleaned very completely by the cleaning method and by using a cleaning agent, the service life of the ultrafiltration membrane is prolonged and the working efficiency of the ultrafiltration membrane is improved simultaneously.

Description

The cleaning method of inorganic salt precipitates on a kind of milipore filter

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Technical field

The present invention relates to a kind of cleaning method, relate in particular to the cleaning method of inorganic salt precipitates on a kind of milipore filter.

Background technology

In the electroplating industry, milipore filter in use must regularly clean, and keeping certain film permeation flux, and can prolong the life-span of film.Cleaning method is generally confirmed with the character of handling feed liquid according to the character of milipore filter, cleans with waterpower earlier usually during cleaning, then according to circumstances adopts different cleaning fluids to clean.Generally be difficult to the cleaning down sensation for the cleaning of inorganic salt precipitates, still exist after often cleaning residual, thereby influenced the operating efficiency of milipore filter greatly, also shortened the service life of milipore filter.

Summary of the invention

Goal of the invention: the objective of the invention is to deficiency, the cleaning method of inorganic salt precipitates on a kind of milipore filter is provided to prior art.

Technical scheme: the cleaning method of inorganic salt precipitates on a kind of milipore filter of the present invention, the concrete steps of this cleaning method are following:

(1) adopt scavenging pump that product water is squeezed into the milipore filter from cleaning case, product water discharges flushing 10 minutes~15 minutes in milipore filter;

(2) with the product water emptying in the cleaning case, in cleaning case, prepare cleaning fluid then;

(3) with scavenging pump cleaning fluid is pumped in the milipore filter, wash cycles is 30~45 minutes in milipore filter, after circulation finishes, discharges cleaning fluid, and then in milipore filter, pours cleaning fluid and soaked 0.5~1.0 hour;

(4) after immersion was accomplished, the cleaning fluid that drains in the cleaning case also washed cleaning case with product water, and cleaning case pours product water after cleaning and finishing once more in cleaning case;

(5) with scavenging pump product water is pumped into the milipore filter from cleaning case, product water discharges flushing 5~15 minutes in milipore filter;

(6) with the product hydromining in the cleaning case with backwashing pump backwash milipore filter 10~15 minutes;

(7) under product water discharging valve open mode, move the ultrafiltration system that milipore filter is housed, till the product water cleaning that flows out; Be 5 to 30 minutes running time.

Among the present invention, each composition quality umber is following in the cleaning fluid: 0.2~0.5 part of hydrochloric acid, 0.3~1 part of phosphoric acid, 1.5~2.5 parts of citric acids, 2.0~3.0 parts of MCT103,93~98 parts of product water.

The water of product described in the present invention is deionized water.

Beneficial effect: the present invention compared with prior art; Have the following advantages: through adopting being used of cleaning method according to the invention and cleaning agent; With the inorganic salt precipitates on the milipore filter clean very clean; Only there is minimal residue, prolonged the service life of milipore filter greatly, also improved the operating efficiency of milipore filter simultaneously.

The specific embodiment

Be elaborated in the face of technical scheme of the present invention down, but protection scope of the present invention is not limited to said embodiment.

Embodiment 1

The cleaning method of calcium carbonate on a kind of milipore filter, the concrete steps of this cleaning method are following: (make and form 2.5g calcium carbonate on the milipore filter)

(1) adopt scavenging pump that product water is squeezed into the milipore filter from cleaning case, product water discharges flushing 10 minutes in milipore filter;

(2) with the product water emptying in the cleaning case, in cleaning case, prepare cleaning fluid then; Each composition quality umber is following in the cleaning fluid: 0.2g hydrochloric acid, 0.8g phosphoric acid, 2g citric acid, 2.0gMCT103,96g product water;

(3) with scavenging pump cleaning fluid is pumped in the milipore filter, wash cycles is 30 minutes in milipore filter, after circulation finishes, discharges cleaning fluid, and then in milipore filter, pours cleaning fluid and soaked 0.5 hour;

(4) after immersion was accomplished, the cleaning fluid that drains in the cleaning case also washed cleaning case with product water, and cleaning case pours product water after cleaning and finishing once more in cleaning case;

(5) with scavenging pump product water is pumped into the milipore filter from cleaning case, product water discharges flushing 12 minutes in milipore filter;

(6) with the product hydromining in the cleaning case with backwashing pump backwash milipore filter 10 minutes;

(7) under product water discharging valve open mode, move the ultrafiltration system that milipore filter is housed, till the product water cleaning that flows out; Be 20 minutes running time.

The water of product described in the present embodiment is deionized water.

Present embodiment reaches 92% to the cleaning filter of calcium carbonate.

Embodiment 2

The cleaning method of calcium carbonate on a kind of milipore filter, the concrete steps of this cleaning method are following: (make and form 2.0g calcium phosphate on the milipore filter)

(1) adopt scavenging pump that product water is squeezed into the milipore filter from cleaning case, product water discharges flushing 12 minutes in milipore filter;

(2) with the product water emptying in the cleaning case, in cleaning case, prepare cleaning fluid then; Each composition quality umber is following in the cleaning fluid: 0.5g hydrochloric acid, 0.3g phosphoric acid, 1.5g citric acid, 2.2gMCT103,93g product water;

(3) with scavenging pump cleaning fluid is pumped in the milipore filter, wash cycles is 38 minutes in milipore filter, after circulation finishes, discharges cleaning fluid, and then in milipore filter, pours cleaning fluid and soaked 0.8 hour;

(4) after immersion was accomplished, the cleaning fluid that drains in the cleaning case also washed cleaning case with product water, and cleaning case pours product water after cleaning and finishing once more in cleaning case;

(5) with scavenging pump product water is pumped into the milipore filter from cleaning case, product water discharges flushing 5 minutes in milipore filter;

(6) with the product hydromining in the cleaning case with backwashing pump backwash milipore filter 12 minutes;

(7) under product water discharging valve open mode, move the ultrafiltration system that milipore filter is housed, till the product water cleaning that flows out; Be 5 minutes running time.

The water of product described in the present embodiment is deionized water.

Cleaning rate to calcium phosphate on the milipore filter in the present embodiment reaches 93.1%.

 

Embodiment 3

The cleaning method of inorganic salt precipitates on a kind of milipore filter is characterized in that: the concrete steps of this cleaning method are following: (make and form 3.0g barium sulfate on the milipore filter)

(1) adopt scavenging pump that product water is squeezed into the milipore filter from cleaning case, product water discharges flushing 15 minutes in milipore filter;

(2) with the product water emptying in the cleaning case, in cleaning case, prepare cleaning fluid then; Each composition quality umber is following in the cleaning fluid: 0.5g hydrochloric acid, 1g phosphoric acid, 2.5g citric acid, 3.0gMCT103,98g product water;

(3) with scavenging pump cleaning fluid is pumped in the milipore filter, wash cycles is 45 minutes in milipore filter, after circulation finishes, discharges cleaning fluid, and then in milipore filter, pours cleaning fluid and soaked 1.0 hours;

(4) after immersion was accomplished, the cleaning fluid that drains in the cleaning case also washed cleaning case with product water, and cleaning case pours product water after cleaning and finishing once more in cleaning case;

(5) with scavenging pump product water is pumped into the milipore filter from cleaning case, product water discharges flushing 15 minutes in milipore filter;

(6) with the product hydromining in the cleaning case with backwashing pump backwash milipore filter 15 minutes;

(7) under product water discharging valve open mode, move the ultrafiltration system that milipore filter is housed, till the product water cleaning that flows out; Be 30 minutes running time.

The water of product described in the present embodiment is deionized water.

Present embodiment reaches 92.7% to the clean rate of barium sulfate on the milipore filter.

Claims (3)

1. the cleaning method of inorganic salt precipitates on the milipore filter, it is characterized in that: the concrete steps of this cleaning method are following:
(1) adopt scavenging pump that product water is squeezed into the milipore filter from cleaning case, product water discharges flushing 10 minutes~15 minutes in milipore filter;
(2) with the product water emptying in the cleaning case, in cleaning case, prepare cleaning fluid then;
(3) with scavenging pump cleaning fluid is pumped in the milipore filter, wash cycles is 30~45 minutes in milipore filter, after circulation finishes, discharges cleaning fluid, and then in milipore filter, pours cleaning fluid and soaked 0.5~1.0 hour;
(4) after immersion was accomplished, the cleaning fluid that drains in the cleaning case also washed cleaning case with product water, and cleaning case pours product water after cleaning and finishing once more in cleaning case;
(5) with scavenging pump product water is pumped into the milipore filter from cleaning case, product water discharges flushing 5~15 minutes in milipore filter;
(6) with the product hydromining in the cleaning case with backwashing pump backwash milipore filter 10~15 minutes;
(7) under product water discharging valve open mode, move the ultrafiltration system that milipore filter is housed, till the product water cleaning that flows out; Be 5 to 30 minutes running time.
2. the cleaning method of inorganic salt precipitates on a kind of milipore filter according to claim 1; It is characterized in that: each composition quality umber is following in the said cleaning fluid: 0.2~0.5 part of hydrochloric acid, 0.3~1 part of phosphoric acid, 1.5~2.5 parts of citric acids; 2.0~3.0 parts of MCT103,93~98 parts of product water.
3. the cleaning method of inorganic salt precipitates on a kind of milipore filter according to claim 1 is characterized in that: said product water is deionized water.
CN 201110197115 2011-07-14 2011-07-14 Method for cleaning inorganic salt precipitates on ultrafiltration membrane CN102327741B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110197115 CN102327741B (en) 2011-07-14 2011-07-14 Method for cleaning inorganic salt precipitates on ultrafiltration membrane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110197115 CN102327741B (en) 2011-07-14 2011-07-14 Method for cleaning inorganic salt precipitates on ultrafiltration membrane

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CN102327741A true CN102327741A (en) 2012-01-25
CN102327741B CN102327741B (en) 2013-07-10

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007130523A (en) * 2005-11-08 2007-05-31 Kobelco Eco-Solutions Co Ltd Membrane washing method for water treatment system
WO2008006173A1 (en) * 2006-07-14 2008-01-17 Siemens Water Technologies Corp. Improved monopersulfate treatment of membranes
CN101164674A (en) * 2007-08-14 2008-04-23 天津市华宇膜技术有限公司 Method for recovering column type ultrafiltering membrane processing technology membrane flux
CN101259379A (en) * 2007-12-13 2008-09-10 上海交通大学 Method for cleaning hollow fiber gas-liquid membrane contactor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007130523A (en) * 2005-11-08 2007-05-31 Kobelco Eco-Solutions Co Ltd Membrane washing method for water treatment system
WO2008006173A1 (en) * 2006-07-14 2008-01-17 Siemens Water Technologies Corp. Improved monopersulfate treatment of membranes
CN101164674A (en) * 2007-08-14 2008-04-23 天津市华宇膜技术有限公司 Method for recovering column type ultrafiltering membrane processing technology membrane flux
CN101259379A (en) * 2007-12-13 2008-09-10 上海交通大学 Method for cleaning hollow fiber gas-liquid membrane contactor

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