CN102538572A - Method for cleaning spiral-plate heat exchanger - Google Patents
Method for cleaning spiral-plate heat exchanger Download PDFInfo
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- CN102538572A CN102538572A CN2012100239136A CN201210023913A CN102538572A CN 102538572 A CN102538572 A CN 102538572A CN 2012100239136 A CN2012100239136 A CN 2012100239136A CN 201210023913 A CN201210023913 A CN 201210023913A CN 102538572 A CN102538572 A CN 102538572A
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- heat exchanger
- spiral
- plate heat
- water
- blowoff valve
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
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Abstract
The invention discloses a method for cleaning a spiral-plate heat exchanger, which comprises the steps that: firstly, cooling circulating water enters the spiral-plate heat exchanger to be permeated. Secondly, inhibitor is injected, and water is added in the spiral-plate heat exchanger to keep a container in an overflow state and control flow rate of a blowdown valve. Thirdly, acid liquor is lead out to a cooling circulating water outlet of the spiral-plate heat exchanger, and a water pipe is added, thereby controlling quality percentage concentration of the acid liquor on the cooling circulating water outlet. Fourthly, the blowdown valve is opened, the flow rate of the blowdown valve is controlled to lead dilute acid liquor to directly contact with a device body, an acid liquor valve is closed, and a water pipe replacement heat exchanger is turned up until water from the blowdown valve becomes neutral. The method for cleaning the spiral-plate heat exchanger uses permeable reaction and a method of bringing out solution, solves the difficult problem that the spiral-plate heat exchanger is difficult to clean, prolongs life of the spiral-plate heat exchanger, and greatly reduces equipment investment and labor cost brought by replacement of equipment.
Description
Technical field
The present invention relates to a kind of cleaning method of equipment scale removal, specifically be meant a kind of method of cleaning spiral-plate heat exchanger.
Background technology
At present; In the process that tubular heat exchangers such as vacuum salt production use; Because heat exchanger calcium magnesium addition in the process of using sticks to and has influence on the heat exchange effect on the tube wall; Existing mostly with using the in addition scale removal of 3～5% hydrochloric acid or sulfuric acid behind the corrosion inhibiter protection steel systeming equipment again, the method for cleaning is to circulate in equipment with diluted acid water, makes calcium magnesium addition and diluted acid be reacted into calcium chloride soluble in water, magnesium chloride or calcium sulfate magnesium sulfate.Spiral-plate heat exchanger receives the limitation of equipment design, and dirty stifled back diluted acid circulates in equipment and is difficult for, and is difficult to clean.
Summary of the invention
The object of the invention is exactly that a kind of method that makes the spiral-plate heat exchanger that is difficult to snaking be able to fully clean and prolong the cleaning spiral-plate heat exchanger in its service life will be provided.
For solving the problems of the technologies described above, a kind of method of cleaning spiral-plate heat exchanger provided by the invention may further comprise the steps:
(1), cooling circulating water gets into spiral-plate heat exchanger and permeates: inlet port short circuit place increases by a blowoff valve in said spiral-plate heat exchanger lower end, and cooling circulating water gets into from the spiral-plate heat exchanger lower end, flows out from the spiral-plate heat exchanger upper end;
(2), close cooling circulating water outlet valve and blowoff valve, from port of export injection corrosion inhibiter 300～500ml; , adds water in the spiral-plate heat exchanger and keep container to be in overflow status 20-40 minute, and the flow of control blowoff valve is 1m
3/ h;
(3), draw acid solution to spiral-plate heat exchanger cool cycles water out, and draw a water pipe and add, control cooling circulating water exit acid solution mass percent concentration is 3～5% from acid storage;
(4), open blowoff valve, the flow of control blowoff valve is 5～20m
3/ h makes the dilution acid solution directly contact with apparatus body; Close the acid solution valve when concentration difference of the diluted acid water that the concentration ratio blowoff valve of the pickle that goes out when the overflow of spiral-plate heat exchanger cool cycles water out is discharged is lower than 1～2%, open the water that big pipe displacement heat exchanger to blowoff valve comes out and become till the neutrality.
As preferred version, corrosion inhibiter is bi-imidazoline quaternary ammonium salt or 17 alkenyl imidazoline quaternary ammonium salts or carboxyethyl amphoteric imidazoline or 17 alkenyl amine ethyl imidazol(e) hyamines in the said step (2).
Because the spiral-plate heat exchanger cooling circulating water is utilized as recirculated water; The calcium magnesium addition is more in the recirculated water; The present invention provides a kind of method of cleaning spiral-plate heat exchanger, is penetrated into device interior and calcium magnesium addition reaction generation calcium magnesium salts soluble in water through diluted acid, increases the heat exchanger channels and the heat exchange area of spiral plate heat transmission equipment; Improve the heat exchange effect of spiral-plate heat exchanger, technical guarantee is provided for equipment prolongs the utilization and operation life-span.
Utilize earlier among the present invention to add corrosion inhibiter, corrosion inhibiter is adhered to be penetrated into protection apparatus body on the apparatus body steel design.Add diluted acid water, let diluted acid water and the calcium magnesium addition that sticks in the equipment fully react, reach pickling effectiveness along with the diluted acid water outflow of continuous adding.
The method of cleaning spiral-plate heat exchanger provided by the present invention has solved the difficult problem that spiral-plate heat exchanger is difficult to clean, and makes the spiral-plate heat exchanger life-span be able to prolong, and has significantly reduced equipment investment and cost of labor that equipment replacement brings.The present invention has significant meaning for China in the practical application of spiral-plate heat exchanger.
The specific embodiment:
Below in conjunction with specific embodiment the present invention is described further:
Embodiment 1:
A kind of method of cleaning spiral-plate heat exchanger provided by the invention may further comprise the steps:
1, the spiral-plate heat exchanger cooling circulating water gets into from the lower end and brings out, and at first inlet port short circuit place increases by a blowoff valve in the lower end;
2, the cooling circulating water inlet valve cuts out, open blowoff valve, open the cooling circulating water outlet valve then, utilize the hydraulic pressure of system that the calcium magnesium additions such as mud that can discharge in the equipment are discharged from the sewage draining exit recoil;
3, close cooling circulating water outlet valve and blowoff valve, the short circuit between spiral-plate heat exchanger and the outlet valve is taken apart, (confirm the consumption of corrosion inhibiter according to the size of heat exchange area, generally heat exchange area is 20m to inject 300ml bi-imidazoline quaternary ammonium salt from the port of export
2Spiral-plate heat exchanger add the 300ml corrosion inhibiter and get final product), add a spot of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control blowoff valve is big or small, about 1m
3The flow of/h;
4, after about 30 minutes corrosion inhibiter along with flowing of spiral-plate heat exchanger inner fluid fully contacts with the equipment steel design.
5, draw acid solution to spiral-plate heat exchanger cool cycles water out from spent acid groove (or other are equipped with the container of sulfuric acid, hydrochloric acid) with the flexible pipe of DN15, draw a water pipe in addition and add, guarantee that it is 3% that the cool cycles water out goes out acid strength;
6, open blowoff valve, the flow of control blowoff valve is at 5m
3/ h (concrete size is decided according to the heat exchanger degree of mobility), the acid solution of adding and water size will control to and be slightly larger than the blowoff valve discharge rate, guarantee that the cool cycles water out goes out to have the overflow of diluted acid water, prevents not dilute acid solution and directly contacts with apparatus body;
7, the concentration difference of treating the diluted acid water that the concentration ratio blowoff valve of the pickle that the overflow of spiral-plate heat exchanger cool cycles water out goes out is discharged is lower than at 1% o'clock, closes the acid solution valve, opens the water that big pipe displacement heat exchanger to blowoff valve comes out and becomes till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling finishes, and equipment is for use.
The method that the present invention utilizes permeable reactive and dissolving to take out of solves the difficult problem that spiral-plate heat exchanger cleans, and improves the service life of equipment.
Embodiment 2:
A kind of method of cleaning spiral-plate heat exchanger provided by the invention may further comprise the steps:
1, the spiral-plate heat exchanger cooling circulating water gets into from the lower end and brings out, and at first inlet port short circuit place increases by a blowoff valve in the lower end;
2, the cooling circulating water inlet valve cuts out, open blowoff valve, open the cooling circulating water outlet valve then, utilize the hydraulic pressure of system that the calcium magnesium additions such as mud that can discharge in the equipment are discharged from the sewage draining exit recoil;
3, close cooling circulating water outlet valve and blowoff valve; Short circuit between spiral-plate heat exchanger and the outlet valve is taken apart; (confirm the consumption of corrosion inhibiter according to the size of heat exchange area, generally heat exchange area is 20m to inject 400ml 17 alkenyl imidazoline quaternary ammonium salts from the port of export
2Spiral-plate heat exchanger add the 300ml corrosion inhibiter and get final product), add a spot of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control blowoff valve is big or small, about 1m
3The flow of/h;
4, after about 30 minutes corrosion inhibiter along with flowing of spiral-plate heat exchanger inner fluid fully contacts with the equipment steel design.
5, draw acid solution to spiral-plate heat exchanger cool cycles water out from spent acid groove (or other are equipped with the container of sulfuric acid, hydrochloric acid) with the flexible pipe of DN15, draw a water pipe in addition and add, guarantee that it is 4% that the cool cycles water out goes out acid strength;
6, open blowoff valve, the flow of control blowoff valve is at 10m
3/ h (concrete size is decided according to the heat exchanger degree of mobility), the acid solution of adding and water size will control to and be slightly larger than the blowoff valve discharge rate, guarantee that the cool cycles water out goes out to have the overflow of diluted acid water, prevents not dilute acid solution and directly contacts with apparatus body;
7, the concentration difference of treating the diluted acid water that the concentration ratio blowoff valve of the pickle that the overflow of spiral-plate heat exchanger cool cycles water out goes out is discharged is lower than at 1% o'clock, closes the acid solution valve, opens the water that big pipe displacement heat exchanger to blowoff valve comes out and becomes till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling finishes, and equipment is for use.
The method that the present invention utilizes permeable reactive and dissolving to take out of solves the difficult problem that spiral-plate heat exchanger cleans, and improves the service life of equipment.
Embodiment 3:
A kind of method of cleaning spiral-plate heat exchanger provided by the invention may further comprise the steps:
1, the spiral-plate heat exchanger cooling circulating water gets into from the lower end and brings out, and at first inlet port short circuit place increases by a blowoff valve in the lower end;
2, the cooling circulating water inlet valve cuts out, open blowoff valve, open the cooling circulating water outlet valve then, utilize the hydraulic pressure of system that the calcium magnesium additions such as mud that can discharge in the equipment are discharged from the sewage draining exit recoil;
3, close cooling circulating water outlet valve and blowoff valve, the short circuit between spiral-plate heat exchanger and the outlet valve is taken apart, (confirm the consumption of corrosion inhibiter according to the size of heat exchange area, generally heat exchange area is 20m to inject 450ml carboxyethyl amphoteric imidazoline from the port of export
2Spiral-plate heat exchanger add the 300ml corrosion inhibiter and get final product), add a spot of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control blowoff valve is big or small, about 1m
3The flow of/h;
4, after about 30 minutes corrosion inhibiter along with flowing of spiral-plate heat exchanger inner fluid fully contacts with the equipment steel design.
5, draw acid solution to spiral-plate heat exchanger cool cycles water out from spent acid groove (or other are equipped with the container of sulfuric acid, hydrochloric acid) with the flexible pipe of DN15, draw a water pipe in addition and add, guarantee that it is 4% that the cool cycles water out goes out acid strength;
6, open blowoff valve, the flow of control blowoff valve is at 15m
3/ h (concrete size is decided according to the heat exchanger degree of mobility), the acid solution of adding and water size will control to and be slightly larger than the blowoff valve discharge rate, guarantee that the cool cycles water out goes out to have the overflow of diluted acid water, prevents not dilute acid solution and directly contacts with apparatus body;
7, the concentration difference of treating the diluted acid water that the concentration ratio blowoff valve of the pickle that the overflow of spiral-plate heat exchanger cool cycles water out goes out is discharged is lower than at 1.5% o'clock, closes the acid solution valve, opens the water that big pipe displacement heat exchanger to blowoff valve comes out and becomes till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling finishes, and equipment is for use.
The method that the present invention utilizes permeable reactive and dissolving to take out of solves the difficult problem that spiral-plate heat exchanger cleans, and improves the service life of equipment.
Embodiment 4:
A kind of method of cleaning spiral-plate heat exchanger provided by the invention may further comprise the steps:
1, the spiral-plate heat exchanger cooling circulating water gets into from the lower end and brings out, and at first inlet port short circuit place increases by a blowoff valve in the lower end;
2, the cooling circulating water inlet valve cuts out, open blowoff valve, open the cooling circulating water outlet valve then, utilize the hydraulic pressure of system that the calcium magnesium additions such as mud that can discharge in the equipment are discharged from the sewage draining exit recoil;
3, close cooling circulating water outlet valve and blowoff valve; Short circuit between spiral-plate heat exchanger and the outlet valve is taken apart; (confirm the consumption of corrosion inhibiter according to the size of heat exchange area, generally heat exchange area is 20m to inject 500ml 17 alkenyl amine ethyl imidazol(e) hyamines from the port of export
2Spiral-plate heat exchanger add the 300ml corrosion inhibiter and get final product), add a spot of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control blowoff valve is big or small, about 1m
3The flow of/h;
4, after about 30 minutes corrosion inhibiter along with flowing of spiral-plate heat exchanger inner fluid fully contacts with the equipment steel design.
5, draw acid solution to spiral-plate heat exchanger cool cycles water out from spent acid groove (or other are equipped with the container of sulfuric acid, hydrochloric acid) with the flexible pipe of DN15, draw a water pipe in addition and add, guarantee that it is 5% that the cool cycles water out goes out acid strength;
6, open blowoff valve, the flow of control blowoff valve is at 20m
3/ h (concrete size is decided according to the heat exchanger degree of mobility), the acid solution of adding and water size will control to and be slightly larger than the blowoff valve discharge rate, guarantee that the cool cycles water out goes out to have the overflow of diluted acid water, prevents not dilute acid solution and directly contacts with apparatus body;
7, the concentration difference of treating the diluted acid water that the concentration ratio blowoff valve of the pickle that the overflow of spiral-plate heat exchanger cool cycles water out goes out is discharged is lower than at 2% o'clock, closes the acid solution valve, opens the water that big pipe displacement heat exchanger to blowoff valve comes out and becomes till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling finishes, and equipment is for use.
The method that the present invention utilizes permeable reactive and dissolving to take out of solves the difficult problem that spiral-plate heat exchanger cleans, and improves the service life of equipment.
Claims (2)
1. method of cleaning spiral-plate heat exchanger may further comprise the steps:
(1), cooling circulating water gets into spiral-plate heat exchanger and permeates: inlet port short circuit place increases by a blowoff valve in said spiral-plate heat exchanger lower end, and cooling circulating water gets into from the spiral-plate heat exchanger lower end, flows out from the spiral-plate heat exchanger upper end;
(2), close cooling circulating water outlet valve and blowoff valve, from port of export injection corrosion inhibiter 300～500ml; , adds water in the spiral-plate heat exchanger and keep container to be in overflow status 20-40 minute, and the flow of control blowoff valve is 1m
3/ h;
(3), draw acid solution to spiral-plate heat exchanger cool cycles water out, and draw a water pipe and add, control cooling circulating water exit acid solution mass percent concentration is 3～5% from acid storage;
(4), open blowoff valve, the flow of control blowoff valve is 5～20m
3/ h makes the dilution acid solution directly contact with apparatus body; Close the acid solution valve when concentration difference of the diluted acid water that the concentration ratio blowoff valve of the pickle that goes out when the overflow of spiral-plate heat exchanger cool cycles water out is discharged is lower than 1～2%, open the water that big pipe displacement heat exchanger to blowoff valve comes out and become till the neutrality.
2. the method for cleaning spiral-plate heat exchanger according to claim 1 is characterized in that: corrosion inhibiter is bi-imidazoline quaternary ammonium salt or 17 alkenyl imidazoline quaternary ammonium salts or carboxyethyl amphoteric imidazoline or 17 alkenyl amine ethyl imidazol(e) hyamines in the said step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100239136A CN102538572B (en) | 2012-02-03 | 2012-02-03 | Method for cleaning spiral-plate heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100239136A CN102538572B (en) | 2012-02-03 | 2012-02-03 | Method for cleaning spiral-plate heat exchanger |
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| Publication Number | Publication Date |
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| CN102538572A true CN102538572A (en) | 2012-07-04 |
| CN102538572B CN102538572B (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100239136A Active CN102538572B (en) | 2012-02-03 | 2012-02-03 | Method for cleaning spiral-plate heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145397A (en) * | 2016-08-04 | 2016-11-23 | 陕西森瑞石油技术开发有限公司 | A kind of oilfield injection water neutral corrosion inhibiting and descaling agent and preparation and application thereof |
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| JPH1073396A (en) * | 1996-07-24 | 1998-03-17 | Kubota Corp | Method for cleaning plate type heat exchanger |
| JP2001099596A (en) * | 1999-09-29 | 2001-04-13 | Hisaya Matsuo | Method for cleaning plate of plate type heat exchanger |
| US20020066555A1 (en) * | 2000-12-05 | 2002-06-06 | Mulder Eric P. | Geothermal heat pump cleaning control system and method |
| JP2005042026A (en) * | 2003-07-23 | 2005-02-17 | Shoowa Kk | Cleaning agent for heat-exchanger and cleaning method using the same |
| CN1724965A (en) * | 2005-07-15 | 2006-01-25 | 贵州宏福实业开发有限总公司 | Descaling method of phospheric acid concentration heat exchanger |
| CN1828211A (en) * | 2006-04-07 | 2006-09-06 | 付廷明 | Method for removing dirt of solar energy water heater |
| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
| CN201740457U (en) * | 2010-06-25 | 2011-02-09 | 鞍钢股份有限公司 | Gas back-blowing cleaning device for corrugated plate type heat exchanger |
| US20110120497A1 (en) * | 2009-11-25 | 2011-05-26 | Areva Np Inc. | Corrosion product chemical dissolution process |
-
2012
- 2012-02-03 CN CN2012100239136A patent/CN102538572B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1073396A (en) * | 1996-07-24 | 1998-03-17 | Kubota Corp | Method for cleaning plate type heat exchanger |
| JP2001099596A (en) * | 1999-09-29 | 2001-04-13 | Hisaya Matsuo | Method for cleaning plate of plate type heat exchanger |
| US20020066555A1 (en) * | 2000-12-05 | 2002-06-06 | Mulder Eric P. | Geothermal heat pump cleaning control system and method |
| JP2005042026A (en) * | 2003-07-23 | 2005-02-17 | Shoowa Kk | Cleaning agent for heat-exchanger and cleaning method using the same |
| CN1724965A (en) * | 2005-07-15 | 2006-01-25 | 贵州宏福实业开发有限总公司 | Descaling method of phospheric acid concentration heat exchanger |
| CN1828211A (en) * | 2006-04-07 | 2006-09-06 | 付廷明 | Method for removing dirt of solar energy water heater |
| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
| US20110120497A1 (en) * | 2009-11-25 | 2011-05-26 | Areva Np Inc. | Corrosion product chemical dissolution process |
| CN201740457U (en) * | 2010-06-25 | 2011-02-09 | 鞍钢股份有限公司 | Gas back-blowing cleaning device for corrugated plate type heat exchanger |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106145397A (en) * | 2016-08-04 | 2016-11-23 | 陕西森瑞石油技术开发有限公司 | A kind of oilfield injection water neutral corrosion inhibiting and descaling agent and preparation and application thereof |
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| Publication number | Publication date |
|---|---|
| CN102538572B (en) | 2013-10-23 |
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