CN102538572B - Method for cleaning spiral-plate heat exchanger - Google Patents
Method for cleaning spiral-plate heat exchanger Download PDFInfo
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- CN102538572B CN102538572B CN2012100239136A CN201210023913A CN102538572B CN 102538572 B CN102538572 B CN 102538572B CN 2012100239136 A CN2012100239136 A CN 2012100239136A CN 201210023913 A CN201210023913 A CN 201210023913A CN 102538572 B CN102538572 B CN 102538572B
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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 leadout 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 refer to a kind of method of cleaning spiral-plate heat exchanger.
Background technology
At present; in the process that the tubular heat exchangers such as vacuum salt production use; because heat exchanger calcium magnesium addition in the process of using sticks to tube wall and has influence on heat transfer effect; now use again the in addition scale removal of 3～5% hydrochloric acid or sulfuric acid behind the large multiplex corrosion inhibiter protection steel systeming equipment; the method of cleaning is to circulate in equipment with pickle, 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 is subjected to the limitation of device design, and dirty stifled rear diluted acid circulates in equipment and is difficult for, and is difficult to be cleaned.
Summary of the invention
Purpose of the present invention is exactly that a kind of method that makes the spiral-plate heat exchanger that is difficult to snaking fully be cleaned 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 enters spiral-plate heat exchanger and permeates: inlet port short circuit place increases by a blowoff valve in described spiral-plate heat exchanger lower end, and cooling circulating water enters 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, inject corrosion inhibiter 300～500ml from the port of export, adds water in the spiral-plate heat exchanger and keep container to be in overflow status 20-40 minute, and the flow of control of sewage disposal valve is 1m
3/ h;
(3), draw acid solution to spiral-plate heat exchanger cool cycles water out from acid storage, and draw a water pipe and add, control cooling circulating water exit acid solution mass percent concentration is 3～5%;
(4), open blowoff valve, the flow of control of sewage disposal valve is 5～20m
3/ h is so that pickle directly contacts with apparatus body; Close the acid solution valve when concentration difference of the pickle that the concentration ratio blowoff valve of the pickle that overflows when spiral-plate heat exchanger cool cycles water out is discharged is lower than 1～2%, open big pipe displacement heat exchanger to blowoff valve water 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 described 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 invention provides a kind of method of cleaning spiral-plate heat exchanger, be penetrated into the reaction of device interior and calcium magnesium addition by diluted acid and generate calcium magnesium salts soluble in water, increase heat exchanger channels and the heat exchange area of spiral plate heat transmission equipment, improve the heat transfer effect of spiral-plate heat exchanger, use service life that technical guarantee is provided for equipment prolongs.
Utilize first 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 pickle, allow pickle and the calcium magnesium addition that sticks in the equipment fully react, reach the effect of pickling along with the pickle 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 the spiral-plate heat exchanger life-span is prolonged, and has greatly 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 enters from the lower end and brings out, and at first increases by a blowoff valve at inlet port short circuit place, lower end;
2, the cool cycles water inlet valve is closed, open blowoff valve, then open the cooling circulating water outlet valve, 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, (determine 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 small amount of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control of sewage disposal 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 in addition a water pipe 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 of sewage disposal valve is at 5m
3The concrete size of/h(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 pickle overflow, prevents from not having pickle directly to contact with apparatus body;
When the concentration difference of 7, treating the pickle that the concentration ratio blowoff valve of the pickle that spiral-plate heat exchanger cool cycles water out overflows is discharged is lower than 1%, close the acid solution valve, open big pipe displacement heat exchanger to blowoff valve water out and become till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling is complete, and equipment is stand-by.
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 enters from the lower end and brings out, and at first increases by a blowoff valve at inlet port short circuit place, lower end;
2, the cool cycles water inlet valve is closed, open blowoff valve, then open the cooling circulating water outlet valve, 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, (determine 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 small amount of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control of sewage disposal 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 in addition a water pipe 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 of sewage disposal valve is at 10m
3The concrete size of/h(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 pickle overflow, prevents from not having pickle directly to contact with apparatus body;
When the concentration difference of 7, treating the pickle that the concentration ratio blowoff valve of the pickle that spiral-plate heat exchanger cool cycles water out overflows is discharged is lower than 1%, close the acid solution valve, open big pipe displacement heat exchanger to blowoff valve water out and become till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling is complete, and equipment is stand-by.
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 enters from the lower end and brings out, and at first increases by a blowoff valve at inlet port short circuit place, lower end;
2, the cool cycles water inlet valve is closed, open blowoff valve, then open the cooling circulating water outlet valve, 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, (determine 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 small amount of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control of sewage disposal 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 in addition a water pipe 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 of sewage disposal valve is at 15m
3The concrete size of/h(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 pickle overflow, prevents from not having pickle directly to contact with apparatus body;
When the concentration difference of 7, treating the pickle that the concentration ratio blowoff valve of the pickle that spiral-plate heat exchanger cool cycles water out overflows is discharged is lower than 1.5%, close the acid solution valve, open big pipe displacement heat exchanger to blowoff valve water out and become till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling is complete, and equipment is stand-by.
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 enters from the lower end and brings out, and at first increases by a blowoff valve at inlet port short circuit place, lower end;
2, the cool cycles water inlet valve is closed, open blowoff valve, then open the cooling circulating water outlet valve, 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, (determine 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 small amount of water in the spiral-plate heat exchanger and keep container to be in overflow status, the control of sewage disposal 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 in addition a water pipe 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 of sewage disposal valve is at 20m
3The concrete size of/h(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 pickle overflow, prevents from not having pickle directly to contact with apparatus body;
When the concentration difference of 7, treating the pickle that the concentration ratio blowoff valve of the pickle that spiral-plate heat exchanger cool cycles water out overflows is discharged is lower than 2%, close the acid solution valve, open big pipe displacement heat exchanger to blowoff valve water out and become till the neutrality.
8, restorer outlet short circuit is closed blowoff valve, and pickling is complete, and equipment is stand-by.
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 enters spiral-plate heat exchanger and permeates: inlet port short circuit place increases by a blowoff valve in described spiral-plate heat exchanger lower end, and cooling circulating water enters 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, inject corrosion inhibiter 300～500ml from the port of export, adds water in the spiral-plate heat exchanger and keep container to be in overflow status 20-40 minute, and the flow of control of sewage disposal valve is 1m
3/ h;
(3), draw acid solution to spiral-plate heat exchanger cool cycles water out from acid storage, and draw a water pipe and add, control cooling circulating water exit acid solution mass percent concentration is 3～5%;
(4), open blowoff valve, the flow of control of sewage disposal valve is 5～20m
3/ h is so that pickle directly contacts with apparatus body; Close the acid solution valve when concentration difference of the pickle that the concentration ratio blowoff valve of the pickle that overflows when spiral-plate heat exchanger cool cycles water out is discharged is lower than 1～2%, open big pipe displacement heat exchanger to blowoff valve water 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 described 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN102538572A CN102538572A (en) | 2012-07-04 |
| CN102538572B true CN102538572B (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100239136A Active CN102538572B (en) | 2012-02-03 | 2012-02-03 | Method for cleaning spiral-plate heat exchanger |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| 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 of corrugated plate type heat exchanger |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3308818B2 (en) * | 1996-07-24 | 2002-07-29 | 株式会社クボタ | Cleaning method for plate heat exchanger |
| JP3598242B2 (en) * | 1999-09-29 | 2004-12-08 | 久哉 松尾 | Plate washing method for plate heat exchanger |
| US6604577B2 (en) * | 2000-12-05 | 2003-08-12 | Eric P. Mulder | Geothermal heat pump cleaning control system and method |
| JP4383118B2 (en) * | 2003-07-23 | 2009-12-16 | ショーワ株式会社 | Cleaning method of heat exchanger |
| US8591663B2 (en) * | 2009-11-25 | 2013-11-26 | Areva Np Inc | Corrosion product chemical dissolution process |
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2012
- 2012-02-03 CN CN2012100239136A patent/CN102538572B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 of corrugated plate type heat exchanger |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2001-99596A 2001.04.13 |
| JP特开2005-42026A 2005.02.17 |
| JP特开平10-73396A 1998.03.17 |
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