CN102353300A - Method for cleaning plate-type heat exchanger - Google Patents
Method for cleaning plate-type heat exchanger Download PDFInfo
- Publication number
- CN102353300A CN102353300A CN 201110237164 CN201110237164A CN102353300A CN 102353300 A CN102353300 A CN 102353300A CN 201110237164 CN201110237164 CN 201110237164 CN 201110237164 A CN201110237164 A CN 201110237164A CN 102353300 A CN102353300 A CN 102353300A
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- Prior art keywords
- heat exchanger
- cleaning
- type heat
- plate type
- acid
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- 238000004140 cleaning Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000007935 neutral effect Effects 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 25
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 6
- GMEHFXXZSWDEDB-UHFFFAOYSA-N N-ethylthiourea Chemical compound CCNC(N)=S GMEHFXXZSWDEDB-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 5
- 229910001388 sodium aluminate Inorganic materials 0.000 description 5
- 239000012459 cleaning agent Substances 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a method for cleaning a plate-type heat exchanger and relates to an on-line cleaning method of the plate-type heat exchanger, in particular a cooling side of the plate-type heat exchanger in the production process of alumina. The method is characterized by comprising the following steps of: in the cleaning process, injecting a cleaning solution into the cooling side of the plate-type heat exchanger, and circularly cleaning; and after cleaning is finished, washing by using softened water to make the cleaning solution neutral. By adoption of the method, the in-place cleaning of the plate-type heat exchanger can be realized under the condition of non-disassembly of plate sheets, and trouble on disassembly can be avoided. The method is simple, time-saving, labor-saving, high in efficiency and low in cost; cleaning period is short; labor intensity is greatly reduced; and the damage to equipment body caused by manual cleaning is reduced.
Description
Technical field
A kind of cleaning method of plate type heat exchanger relates to the on-line cleaning method of the logical cold side of plate type heat exchanger, particularly plate type heat exchanger in a kind of aluminum oxide production process.
Background technology
Process for making alumina decomposes after requiring sodium aluminate solution will pass through cooling again; It is more to implement cooling system; Generally using equipment at present mainly is heat-exchangers of the plate type; Good effect of heat exchange; Floor space is little, and technological process is simple, but also has weak point; Be exactly that cold side is prone to generate impurity, influence the heat exchange effect.
The tradition method for cleaning is implemented the labor cleaning exactly, with regard to the sodium aluminate concentrate solution heat-exchangers of the plate type, plate must be removed one by one, piecewise cleaning; And then install one by one, carelessness is arranged slightly, cause the airtight and watertight padding damage or cause the plate distortion; The cleaning amount is big, and consumption costs is high, and operation rate is low.
Summary of the invention
The object of the invention is exactly in order to address the above problem, and has carried a kind ofly realizing the plate type heat exchanger on-line cleaning, under the condition of not dismantling plate, effectively removes the cleaning method of the plate type heat exchanger of heat-exchangers of the plate type cold side impurity.
The objective of the invention is to realize through following technical scheme.
A kind of cleaning method of plate type heat exchanger is characterized in that its cleaning process is to feed cleaning fluid in the heat exchanger cold side, carries out wash cycles, and is after cleaning finishes, extremely neutral with the demineralized water flushing again.
The cleaning method of a kind of plate type heat exchanger of the present invention is characterized in that described cleaning fluid is that to adopt solid cleaner to add water formulated, and the weight of its solid cleaner consists of 91% sulfamic acid, 5% citric acid, 4% ethyl thiourea; The mass fraction that adds the solid cleaner in the cleaning fluid that water is made into is 7%-10%.
The cleaning method of a kind of plate type heat exchanger of the present invention is characterized in that described cleaning process process feeds plate type heat exchanger through circulation liquid pool, acid-proof pipe, acid-proof pump with the cleaning fluid circulation; Between circulation liquid pool and the acid-proof pump, between acid-proof pump outlet and the heat exchanger inlet valve, connect the formation closed circuit circulatory system with acid-proof pipe respectively between heat exchanger flowing water Valve and the circulation liquid pool water inlet.
The cleaning method of a kind of plate type heat exchanger of the present invention is characterized in that described cleaning fluid gets into from the plate type heat exchanger bottom, flow out on top.
The cleaning method of a kind of plate type heat exchanger of the present invention is characterized in that described cleaning process wash cycles 6 hours.
The cleaning method of a kind of plate type heat exchanger of the present invention; Make heat exchanger under the condition of not dismantling plate, realize cleaning on the throne; Remove the trouble of disintegration from; And method is simple, and is time saving and energy saving, and cleaning cycle is short; Instant effect; Expense is low, has reduced labour intensity widely, also reduces and artificially clears up the apparatus body spoilage.
The specific embodiment
A kind of cleaning method of plate type heat exchanger is imported and exported the increase cleaning process in the heat exchanger cold side, and the cleaning fluid that preparation is qualified is sent in the heat exchanger wash cycles 6 hours through pump and pipeline.After cleaning end, cleaning fluid is put back to the circulation liquid pool, the plate type heat exchanger cold side is extremely neutral with the demineralized water flushing.The cleaning process device comprises circulation liquid pool, acid-proof pipe, acid-proof pump; Between circulation liquid pool and the acid-proof pump, between acid-proof pump outlet and the heat exchanger inlet valve, connect the formation closed circuit circulatory system with acid-proof pipe respectively between heat exchanger flowing water Valve and the circulation liquid pool water inlet.
The used solid cleaner of the present invention is made up of 91% sulfamic acid, 5% citric acid, 4% ethyl thiourea.During use, add water and be made into the cleaning fluid that mass fraction is 7-10%.For making cleaning agent be full of heat exchanger, take into account effluxing of gas in the product simultaneously, cleaning process is necessary for " low in and high out ", otherwise cleaning performance reduces, and influences heat exchange efficiency.
Details are as follows to the present invention below in conjunction with embodiment:
Embodiment 1
Earlier the terminal valve of plate type heat exchanger sodium aluminate concentrate solution side (thermal medium) is closed, again the terminal valve of water side (cold medium) is closed.Water inlet with the water side is the cleaning fluid import, and delivery port is that rinse liquid outlet and acid-proof pump, circulation liquid pool, acidproof pipeline are formed the clean cycle system.
Ratio adds cleaning agent and water on request in the circulation liquid pool, is made into mass fraction and is 7% cleaning fluid.The side of fetching boiling water then terminal valve starts acid-proof pump, the beginning wash cycles.
Clean after 3 hours and whenever opened blowoff valve once at a distance from 1 hour, each blowdown 5 minutes is arrived original water level in the water filling of circulation liquid pool then.Wash cycles termination of pumping after 6 hours is put back to the circulation liquid pool with cleaning fluid.
Connect flushing water and carry out rinsing, guarantee to remove cleaning process behind the cleaning fluid of noresidue in the heat exchanger, it is subsequent use to recover original flow process.
After cleaning end, take plate type heat exchanger apart observation and find that the plate surface is comparatively cleaned, and does not have tangible fouling to adhere to and evidence of corrosion.Plate type heat exchanger is cleaned rate and is reached 90.14%, and descaling rate reaches 93.46%.
Embodiment 2
Earlier the terminal valve of plate type heat exchanger sodium aluminate concentrate solution side (thermal medium) is closed, again the terminal valve of water side (cold medium) is closed.Water inlet with the water side is the cleaning fluid import, and delivery port is that rinse liquid outlet and acid-proof pump, circulation liquid pool, acidproof pipeline are formed clean cycle system (shown in accompanying drawing 1).
Ratio adds cleaning agent and water on request in the circulation liquid pool, is made into mass fraction and is 8% cleaning fluid.The side of fetching boiling water then terminal valve starts acid-proof pump, the beginning wash cycles.
Clean after 3 hours and whenever opened blowoff valve once at a distance from 1 hour, each blowdown 5 minutes is arrived original water level in the water filling of circulation liquid pool then.Wash cycles termination of pumping after 6 hours is put back to the circulation liquid pool with cleaning fluid.
Connect flushing water and carry out rinsing, guarantee to remove cleaning process behind the cleaning fluid of noresidue in the heat exchanger, it is subsequent use to recover original flow process.
After cleaning end, take plate type heat exchanger apart observation and find that the plate surface is comparatively cleaned, and does not have tangible fouling to adhere to and evidence of corrosion.Plate type heat exchanger is cleaned rate and is reached 90.86%, and descaling rate reaches 94.75%.
Embodiment 3:
Earlier the terminal valve of plate type heat exchanger sodium aluminate concentrate solution side (thermal medium) is closed, again the terminal valve of water side (cold medium) is closed.Water inlet with the water side is the cleaning fluid import, and delivery port is that rinse liquid outlet and acid-proof pump, circulation liquid pool, acidproof pipeline are formed clean cycle system (shown in accompanying drawing 1).
Ratio adds cleaning agent and water on request in the circulation liquid pool, is made into mass fraction and is 10% cleaning fluid.The side of fetching boiling water then terminal valve starts acid-proof pump, the beginning wash cycles.
Clean after 3 hours and whenever opened blowoff valve once at a distance from 1 hour, each blowdown 5 minutes is arrived original water level in the water filling of circulation liquid pool then.Wash cycles termination of pumping after 6 hours is put back to the circulation liquid pool with cleaning fluid.
Connect flushing water and carry out rinsing, guarantee to remove cleaning process behind the cleaning fluid of noresidue in the heat exchanger, it is subsequent use to recover original flow process.
After cleaning end, take plate type heat exchanger apart observation and find that the plate surface is comparatively cleaned, and does not have tangible fouling to adhere to and evidence of corrosion.Plate type heat exchanger is cleaned rate and is reached 91.34%, and descaling rate reaches 95.47%.
Claims (4)
1. the cleaning method of a plate type heat exchanger is characterized in that its cleaning process is to feed cleaning fluid in the heat exchanger cold side, carrying out wash cycles, and is after cleaning finishes, extremely neutral with the demineralized water flushing again.
2. the cleaning method of a kind of plate type heat exchanger according to claim 1 is characterized in that described cleaning fluid is that to adopt solid cleaner to add water formulated, and the weight of its solid cleaner consists of 91% sulfamic acid, 5% citric acid, 4% ethyl thiourea; The mass fraction that adds the solid cleaner in the cleaning fluid that water is made into is 7%-10%.
3. the cleaning method of a kind of plate type heat exchanger according to claim 1 is characterized in that described cleaning process process feeds plate type heat exchanger through circulation liquid pool, acid-proof pipe, acid-proof pump with the cleaning fluid circulation; Between circulation liquid pool and the acid-proof pump, between acid-proof pump outlet and the heat exchanger inlet valve, connect the formation closed circuit circulatory system with acid-proof pipe respectively between heat exchanger flowing water Valve and the circulation liquid pool water inlet.
4. the cleaning method of a kind of plate type heat exchanger according to claim 1 is characterized in that described cleaning fluid gets into from the plate type heat exchanger bottom, flow out on top.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110237164 CN102353300A (en) | 2011-08-18 | 2011-08-18 | Method for cleaning plate-type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110237164 CN102353300A (en) | 2011-08-18 | 2011-08-18 | Method for cleaning plate-type heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102353300A true CN102353300A (en) | 2012-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110237164 Pending CN102353300A (en) | 2011-08-18 | 2011-08-18 | Method for cleaning plate-type heat exchanger |
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| Country | Link |
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| CN (1) | CN102353300A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778168A (en) * | 2012-07-30 | 2012-11-14 | 黑龙江建龙钢铁有限公司 | Cleaning method of coking liquid plate heat exchanger |
| CN102954730A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Cleaning method of cooling side of plate type heat exchanger |
| CN106197139A (en) * | 2016-06-30 | 2016-12-07 | 华电能源股份有限公司佳木斯热电厂 | A kind of cleaning method for Thermal Corp's heat exchanger |
| CN107218842A (en) * | 2017-07-27 | 2017-09-29 | 南京工业大学 | Plate heat exchanger cleaning device for air conditioning unit |
| CN108680054A (en) * | 2018-05-30 | 2018-10-19 | 华北电力科学研究院有限责任公司西安分公司 | A kind of pre- heat exchanger cleaning method of movable type VACOM and device |
| CN112964124A (en) * | 2021-04-09 | 2021-06-15 | 杭州制氧机集团股份有限公司 | Automatic cleaning device for heat transfer fins of aluminum plate-fin heat exchanger |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0574495B1 (en) * | 1991-03-08 | 1995-06-14 | Novo Nordisk A/S | Method for cleaning of heat exchangers |
| CN1253171A (en) * | 1998-11-06 | 2000-05-17 | 武汉市华天新技术开发有限公司 | Efficient cleaner for centralized air conditioner and its application method |
| US20050211274A1 (en) * | 2002-11-26 | 2005-09-29 | Refined Technologies, Inc. | Heat exchanger cleaning process |
| CN201331295Y (en) * | 2008-12-16 | 2009-10-21 | 宁夏鲁西化工化肥有限公司 | Scale deposit removing device for plate type heat exchanger |
| CN101858708A (en) * | 2010-06-21 | 2010-10-13 | 南京钢铁股份有限公司 | Cleaning method of coking heat exchange equipment |
| CN101871745A (en) * | 2010-06-24 | 2010-10-27 | 瓮福（集团）有限责任公司 | Sulphuric acid plant liquid and liquid heat exchanger on-line cleaning method |
| CN201885634U (en) * | 2011-03-02 | 2011-06-29 | 特变电工新疆硅业有限公司 | Automatic cleaning device for plate-type heat exchanger |
-
2011
- 2011-08-18 CN CN 201110237164 patent/CN102353300A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0574495B1 (en) * | 1991-03-08 | 1995-06-14 | Novo Nordisk A/S | Method for cleaning of heat exchangers |
| CN1253171A (en) * | 1998-11-06 | 2000-05-17 | 武汉市华天新技术开发有限公司 | Efficient cleaner for centralized air conditioner and its application method |
| US20050211274A1 (en) * | 2002-11-26 | 2005-09-29 | Refined Technologies, Inc. | Heat exchanger cleaning process |
| CN201331295Y (en) * | 2008-12-16 | 2009-10-21 | 宁夏鲁西化工化肥有限公司 | Scale deposit removing device for plate type heat exchanger |
| CN101858708A (en) * | 2010-06-21 | 2010-10-13 | 南京钢铁股份有限公司 | Cleaning method of coking heat exchange equipment |
| CN101871745A (en) * | 2010-06-24 | 2010-10-27 | 瓮福（集团）有限责任公司 | Sulphuric acid plant liquid and liquid heat exchanger on-line cleaning method |
| CN201885634U (en) * | 2011-03-02 | 2011-06-29 | 特变电工新疆硅业有限公司 | Automatic cleaning device for plate-type heat exchanger |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778168A (en) * | 2012-07-30 | 2012-11-14 | 黑龙江建龙钢铁有限公司 | Cleaning method of coking liquid plate heat exchanger |
| CN102954730A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Cleaning method of cooling side of plate type heat exchanger |
| CN106197139A (en) * | 2016-06-30 | 2016-12-07 | 华电能源股份有限公司佳木斯热电厂 | A kind of cleaning method for Thermal Corp's heat exchanger |
| CN107218842A (en) * | 2017-07-27 | 2017-09-29 | 南京工业大学 | Plate heat exchanger cleaning device for air conditioning unit |
| CN108680054A (en) * | 2018-05-30 | 2018-10-19 | 华北电力科学研究院有限责任公司西安分公司 | A kind of pre- heat exchanger cleaning method of movable type VACOM and device |
| CN112964124A (en) * | 2021-04-09 | 2021-06-15 | 杭州制氧机集团股份有限公司 | Automatic cleaning device for heat transfer fins of aluminum plate-fin heat exchanger |
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Application publication date: 20120215 |