CN109827462A - A kind of cleaning device and its cleaning process of heat exchange equipment - Google Patents
A kind of cleaning device and its cleaning process of heat exchange equipment Download PDFInfo
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- CN109827462A CN109827462A CN201910293706.4A CN201910293706A CN109827462A CN 109827462 A CN109827462 A CN 109827462A CN 201910293706 A CN201910293706 A CN 201910293706A CN 109827462 A CN109827462 A CN 109827462A
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- cleaning
- centrifugal pump
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- exchange equipment
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Abstract
A kind of cleaning device and cleaning process of heat exchange equipment, device be mainly by heat exchange equipment (1), soda liquor container (2), cleaning liquid pool I (16), cleaning liquid pool II (18), centrifugal pump (7) centrifugal pump water inlet pipe (5), centrifugation water pump outlet pipe (8), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), threeway (6) and its between connecting line form.It is cleaned by its technique, can significantly save the dosage of cleaning agent stoste, save raw material and cost；Cleaning effect can reach relevant standard requirements；Work efficiency is high, cleaning speed is fast, short construction period；Simplify apparatus；It can guarantee the long-time service of heat exchange equipment, the service life of equipment can be greatly prolonged.
Description
Technical field
It is a kind of to clean scale with chemicals the present invention relates to a kind of cleaning device of heat exchange equipment and its cleaning process
Device and process, the removing of scale suitable for the large-scale heat exchange equipment such as tubular heat exchanger.
Background technique
Currently, the large size heat exchange equipment such as power plant, steam-condenser of thermal power plants, heat exchangers for district heating carries out heat for steam and water
It exchanges, the deposits such as scale formed on heat exchange equipment tube wall in the course of work will affect heat exchange efficiency, in order to guarantee not lose
Heat needs heat exchanging equipment to be cleaned.
Traditional cleaning way has:
1. mechanical means cleans: general use such as scrapes, brushes at the manual methods, cannot thoroughly remove the deposits such as scale, time-consuming to take
Power, working efficiency is low, and the length of pipe is longer, and difficulty is bigger, and cleaning effect is undesirable.
2. giant rinses: high pressure water is to behaviour when cannot remove generated stubbornness scale in watering equipment, and construct
There are Personal Risks by author.
3. chemical cleaning: generally using systemic circulation pickling, using fluid injection, immersion, circulation, again impregnate, recycle, finally
The technical process rinsed with clear water, acid solution generally use oxalic acid, nitric acid etc., and disadvantage is as follows:
1. oxalic acid has strong pungent smell, and influence surrounding enviroment harmful on the health of human body of operator；
2. nitric acid therein is stronger to equipment corrosion, corrosion forms loophole, and remaining acid generates secondary corruption to the material of container
Erosion or underdeposit corrosion, eventually lead to equipment damage and cause to replace in advance, reduce service life of equipment, increase cost；
3. systemic circulation and immersion acid solution amount used are very big, cost input is big；
4. the waste water and waste liquid being discharged after the completion of pickling pollutes, environmental protection is not up to standard, and subsequent processing needs substantial contribution.
In order to overcome deficiency existing for current heat exchange equipment cleaning method, it is necessary to research and develop a kind of simple process, work effect
Rate is high, cleaning speed is fast, short construction period, the heat exchange equipment cleaning device and technique for saving raw material, waste liquid environment protection standard.
Summary of the invention
For the above-mentioned technical problem for solving current heat exchange equipment conventional clean mode, the present invention provides a kind of heat exchange equipment
Cleaning device and its cleaning process, device technique is simple, work efficiency is high, cleaning speed is fast, short construction period, saves former material
Material, waste liquid environment protection standard, are achieved through the following technical solutions, and the device of this cleaning process is mainly by heat exchange equipment (1), cleaning
Liquid container (2), cleaning liquid pool I (16), cleaning liquid pool II (18), centrifugal pump (7) centrifugal pump water inlet pipe (5), centrifugation water pump outlet pipe
(8), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), threeway (6) and its between connecting line composition.
The cleaning device composition of the invention is described as follows:
Heat exchange equipment (1) is the equipment for needing to clean.
Soda liquor container (2) selects the original-pack plastics empty barrel of container-type of imported from America R-Levels brand cleaning agent, holds
Product is 1.25m3, light-weight, acid-alkali-corrosive-resisting is readily transported and replaces.It prepares for containing stoste and water in 1:3 ratio clear
Washing lotion, or for adding stoste in cleaning process.It is mounted with soda liquor container pipe valve (3) on its outlet at bottom pipeline, passes through behaviour
Make it to open or close to control the addition of cleaning solution.
It is had no irritating odor using imported from America R-Levels brand cleaning agent, it will not be to the health of human body of operator
It causes damages, will not influence surrounding enviroment；There is no corrosivity to equipment, anticaustic will not be generated to the material of equipment
Or underdeposit corrosion, the service life of equipment is extended, is reduced costs.
Support tube (9) is existing steel cylindrical tube in heat exchange equipment (1), and surface is smooth.It is that maintenance operation sets up foot hand
The support tube of frame, if can be set up according to field condition, without support tube to support channel steel in heat exchange equipment (1)
It (10) and lead screw (11) is, its stress supporting point.
Cleaning liquid pool I (16) is by the bottom lumen walls of heat exchange equipment (1), rubber stopper (14), lower part heat exchanger tube (15) group
At for storing the cleaning solution for having cleaned and having flowed down after heat exchange equipment (1) upper pipeline.It, need to be by rubber stopper (14) when site operation
The right end of the lower part heat exchanger tube (15) of intake antrum (20) and backwater cavity (23) interior lowest part is filled in one by one, it is urgent stifled tight, it prevents clear
Washing lotion outflow, mounting height are generally 1m or so, make to fill the cleaning flowed by cleaning liquid pool I (16) in lower part heat exchanger tube (15)
Liquid, guarantee cleaning upper pipeline when simultaneously soaking and washing lower part heat exchanger tube (15).
Cleaning liquid pool II (18) be by support tube (9), channel steel (10), lead screw (11), pressing plate (12), rubber slab (13), on
Portion's heat exchanger tube (17), support plate (25) composition.Support tube (9), channel steel (10), lead screw (11), pressing plate (12), rubber slab (13),
Top heat exchanger tube (17), support plate (25) can be carried along into heat exchange equipment by manhole door by operator, be convenient for on-site assembly.
As shown in Figure 1, respectively installing one group at the both ends of top heat exchanger tube (17), installed simultaneously by two groups of operators, timely ditch
Wildcard closes.When installation, channel steel (10) is vertically first subjected to binding and fixing with support tube (9), then two pieces of rubber slabs (13), divide
It is not laid on two end faces of top heat exchanger tube (17), notices that left end rubber slab (13) will be lower than (13) 5 lis of right end rubber slab
Rice or so forms drop, and cleaning solution is formed full of overflowing from the top edge of low left end rubber slab (13) later when to clean
Wash cycles.Then it with three block pressur plates (12), is pressed respectively against in rubber slab (13) both sides of the edge and bottom edge edge, then uses lead screw
(11) one end is withstood on pressing plate (12), and the other end is supported in support channel steel (10) depending on field condition or support tube (9)
On, lead screw (11) is vertical with stress surface, and by the nut on rotational lead screw (11), makes moderate pressure, and pressing plate (12) are pushed up
Jail, while the distance between each lead screw (11) is uniform, it is necessary to assure cleaning liquid pool II (18) no leakage of formation.Thus formed
The cleaning liquid pool II (18) at both ends.In order to avoid rubber slab (13) is attached on heat exchange equipment, two support plates (25) are inserted in
As supporting among the end face of rubber slab (13) and top heat exchanger tube (17), guarantee that the gap between them is fixed, it will before cleaning
The water outlet for being centrifuged water pump outlet pipe (8) is inserted into cleaning solution pond II (18) from this gap.
Liquid pool I (16) are cleaned in the invention and clean the structure setting of liquid pool II (18), with systemic circulation acid cleaning process phase
Compare, have the following advantages:
1. clean in batches, special emphasis cleaning can be carried out for certain a part of serious heat exchanger tube of fouling；
2. a large amount of cleaning solution can be saved.
Traditional systemic circulation pickling by the cold water inlet pipe (19) of heat exchange equipment (1), intake antrum (20), water containing chamber (21),
It is intended in backwater cavity (23), hot return pipe (24) full of cleaning solution, only the cleaning solution requirement of this part just reaches 50m3, the invention
Just by this 50m3The requirement of cleaning solution all saves.
When a whole set of heat exchanger tube cleans simultaneously, cleaning solution requirement is up to 65m3, apparatus of the present invention can as the case may be, often
Only 1500-2000 root, cleaning solution requirement are only 7-10m to the quantity of batch heat exchanger tube cleaning operation3, and can be when next group cleans
It is recycled, saves 55-58m3Cleaning solution.
3. not having to welding when construction and installation, shell, tube wall, the end plate etc. of damage heat exchange equipment are avoided.
Brief cleaning process flow is as follows:
S1. service sink I (16) and service sink II (18), connection centrifugal pump (7), centrifugation pump water inlet are set up in heat exchange equipment (1)
Manage (5), centrifugation water pump outlet pipe (8), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), threeway (6) and its between
Pipeline carries out electrical wiring；
S2. imported from America R-Levels brand cleaning agent and water are prepared into cleaning solution in 1:3 ratio in soda liquor container (2)；
S3. start centrifugal pump (7), the cleaning solution in soda liquor container (2) by soda liquor container pipe valve (3), threeway (6), into
Enter centrifugal pump (7), then be injected into cleaning liquid pool II (18) by centrifugation water pump outlet pipe (8), is filled when in cleaning liquid pool II (18)
It when cleaning solution, closes centrifugal pump (7), impregnates top heat exchanger tube (17)；
S4. after meeting soaking time, start centrifugal pump (7), continue to inject cleaning solution, cleaning solution will be in slightly lower left end rubber
Plate (13) top edge is overflowed, in the cleaning liquid pool I (16) of trickling to lower section, when the liquid level of cleaning liquid pool I (16) reaches certain height
It when spending, opens centrifugal pump water inlet pipe pipe valve (4), and closes soda liquor container pipe valve (3) immediately, cleaning solution will be from cleaning liquid pool
I (16), by centrifugal pump water inlet pipe (5), centrifugal pump water inlet pipe pipe valve (4), threeway (6), into centrifugal pump (7), then by centrifugal pump
Outlet pipe (8) is injected into cleaning liquid pool II (18), then trickles and return to cleaning liquid pool I (16) the formation circulation flushing of lower section；
S5. after cleaning effect passed examination, disassembly, cleaning liquid pool II (18) shifts be mounted on the next position in the same way, presses
According to S3 to S4 repeated washing in batches, until whole heat exchanger tubes cleanings are completed.It is cut in cleaning process by control soda liquor container
The opening and closing of door (3) and centrifugal pump water inlet pipe pipe valve (4), realize the switching of circulation line, and mend to the circulatory system
Fill cleaning solution；
S6. the pH value of test cleaning raffinate, according to result disposition and recovery and rinsing raffinate；
S7. it dismantles and takes out the cleaning device in heat exchange equipment (1)；
S8. clear water flushing heat exchanging pipe is used, it is desirable that each section is rinsed minimum 1 hour, was tested and is rinsed with PH test paper every 20 minutes
The pH value of liquid, until pH value=7；
S9. it hands over inspection, handle examination；
S10. site clearing is restored heat exchange equipment (1), and manhole door etc. is closed；
S11. cleaning terminates.
The beneficial effects of the present invention are:
1, it is capable of the dosage of the saving cleaning agent stoste of highly significant, has significantly saved raw material and cost.
2, cleaning effect can reach the standard requirements of client's heat exchanging equipment cleaning scale.
3, work efficiency is high, cleaning speed is fast, short construction period.
4, apparatus is simplified.
5, cleaning heat exchange equipment is carried out using U.S. R-Levels brand cleaning agent, cleaning effect is good, and to equipment without
Corrosion can effectively remove the precipitating such as generated most obstinate scale (calcium carbonate), rust deposite, grease, foundry loam in heat exchange equipment
Object, while will not cause harm to the human body, it will not be to materials such as steel, red copper, nickel, titanium, rubber, plastics, fiber, glass, ceramics
Matter generates other harmful reactions such as erosion, spot corrosion, oxidation, can guarantee the long-time service of heat exchange equipment, can greatly prolong and set
Standby service life.
Detailed description of the invention
Fig. 1: apparatus of the present invention cleaning system schematic diagram.
Fig. 2: apparatus of the present invention enlarged top view
Fig. 3: apparatus of the present invention A to partial enlarged view
In figure: 1 heat exchange equipment, 2 soda liquor containers, 3 soda liquor container pipe valves, 4 centrifugal pump water inlet pipe pipe valves, 5 centrifugation pump water inlets
Pipe, 6 threeways, 7 centrifugal pumps, 8 centrifugation water pump outlet pipes, 9 support tubes, 10 channel steels, 11 lead screws, 12 pressing plates, 13 rubber slabs, 14 rubber
Plug, 15 lower part heat exchanger tubes, 16 cleaning liquid pools I, 17 top heat exchanger tubes, 18 cleaning liquid pools II, 19 cold water inlet pipes, 20 intake antrums, 21
Water containing chamber, 22 manhole doors, 23 backwater cavities, 24 hot return pipes, 25 support plates.
Specific embodiment
A specific embodiment of the invention is as shown in Figure 1, cleaning device and process flow are as follows:
S1. heat exchanging equipment (1) carry out in-site measurement, as the case may be, production support tube (9) 12, (10) 4, channel steel,
Lead screw (11) 22, pressing plate (12) 6, (13) 2 pieces of rubber slab, support plate (25) 4；
S2. scaffold is set up in the both ends working space of heat exchange equipment (1)；
S3. by manufacture 12 support tubes (9), 4 channel steels (10), 22 lead screws (11), 6 pressing plates (12), 2 blocks of rubber slabs
(13), support plate (25) 4 bring heat exchange equipment into from manhole door by operator, in the top of heat exchange equipment (1) bilateral symmetry
Position respectively installs one group, adjusts the elasticity of lead screw (11), guarantees that the two sides of rubber slab (13) and bottom edge exchange heat with top
The end face contact for managing (17) is close, accomplishes impermeable, and the pressing plate (12) of right end, rubber slab (13) are higher than the pressure of left end by when installation
(13) 5~10 centimetres of plate (12), rubber slab, forming drop can be circulated with guaranteeing cleaning solution from right to left, and from left end rubber
The top edge of plate (13) is overflowed, and guarantees that top heat exchanger tube (17) is saturated with cleaning solution, and two support plates (25) are inserted in rubber slab
(13) guarantee that the gap between them is fixed as supporting with the end face of top heat exchanger tube (17) centre, form cleaning liquid pool II
(18)；
S4. the right end in the bottom of heat exchange equipment (1) fills in rubber stopper (14) in intake antrum (20) and backwater cavity (23) one by one
The right end of the lower part heat exchanger tube (15) of lowest part, it is urgent stifled tight, guarantee indentation securely, by the bottom chamber wall of heat exchange equipment (1), rubber
Rubber plug (14), lower part heat exchanger tube (15) form cleaning liquid pool I (16)；
S5. soda liquor container (2), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), centrifugal pump water inlet pipe are assembled
(5), threeway (6), centrifugal pump (7), centrifugation water pump outlet pipe (8), form circulation line；
S6. electrical wiring is carried out；
S7. cleaning solution is prepared in the ratio of imported from America R-Levels brand cleaning agent and water 1:3 in soda liquor container (2)；
S8. start centrifugal pump (7), cleaning solution is injected in Xiang Qingxi liquid pool II (18), after liquid to be cleaned fills, cleaning solution is from rubber
The top edge of plate (13) is overflowed, and in the cleaning liquid pool I (16) of trickling to lower section, top heat exchanger tube (17) is immersed in cleaning liquid pool II
(18) it is cleaned in, lower part heat exchanger tube (15) is immersed in cleaning liquid pool I (16) and is cleaned；
S9. it when the liquid level for cleaning liquid pool I (16) reach a certain height, opens centrifugal pump water inlet pipe pipe valve (4), and close immediately
Soda liquor container pipe valve (3), cleaning solution will be switched to from cleaning liquid pool I (16), via centrifugal pump water inlet pipe (5), centrifugal pump
Water inlet pipe pipe valve (4), threeway (6) are injected into cleaning liquid pool II (18) into centrifugal pump (7), then by centrifugation water pump outlet pipe (8)
In, it flows through top heat exchanger tube (17), then overflowed from the top edge of rubber slab (13), in the cleaning liquid pool I (16) of trickling to lower section
Formation circulation flushing, soaking flushing at least 4 hours；
S10. it during soaking flushing, is needed every 20 minutes pH values with PH test paper test cleaning solution when pH value is greater than 3
To additional clean agent stoste is added in soda liquor container (2), held by closing centrifugal pump water inlet pipe pipe valve (4), opening cleaning agent
Device pipe valve (3) Lai Shixian cleaning agent stoste is released from soda liquor container (2), flows through soda liquor container pipe valve (3), threeway
(6), centrifugal pump (7), centrifugation water pump outlet pipe (8) are flowed through top heat exchanger tube (17) into cleaning liquid pool II (18), then from rubber
The top edge of offset plate (13) is overflowed, and finally in the cleaning liquid pool I (16) of trickling to lower section, finally guarantees mixed cleaning solution PH
Until value=1.Hereafter centrifugal pump water inlet pipe pipe valve (4) should be opened, closing detergent container pipe valve (3) Lai Shixian is switched to cleaning
Agent from cleaning liquid pool I (16) in release, flow through centrifugal pump water inlet pipe (5), centrifugal pump water inlet pipe pipe valve (4), threeway (6), into
Enter centrifugal pump (7), then be injected into cleaning liquid pool II (18) by centrifugation water pump outlet pipe (8), is flowed through top heat exchanger tube (17), then from
The top edge of rubber slab (13) is overflowed, and circulation flushing is formed in the cleaning liquid pool I (16) of trickling to lower section.
S11. it rinses after impregnating 4 hours, checks the cleaning effect of heat exchanger tube, if it meets the requirements, it is such as undesirable, it needs
Continue to clean；
S12. after cleaning effect passed examination, lead screw (11) 1 to 2 for unclamping left side lowest part release cleaning liquid pool II (18)
In cleaning solution, it is stand-by to flow into storage in cleaning liquid pool I (16)；
S13. lead screw (11), channel steel (10), pressing plate (12), rubber slab (13) are dismantled；
S14. apparatus above is shifted installation in the same way, successively cleans next part, until whole heat exchanger tube cleanings are completed；
S15. lead screw (11), channel steel (10), pressing plate (12), rubber slab (13) are dismantled；
S16. with PH test paper test cleaning liquid pool I (16) in cleaning solution pH value, if pH value be 6-7, can direct emission, such as
When fruit pH value is less than 6, recycled；
S17. the cleaning solution for cleaning liquid pool I (16) is extracted into ready multiple cleaning solution returnable by starting centrifugal pump (7),
Recovery and rinsing liquid；
S18. clear water flushing heat exchanging pipe is used, it is desirable that each section is rinsed minimum 1 hour, was tested and is rinsed with PH test paper every 20 minutes
The pH value of liquid, until pH value=7；
S19. it hands over inspection, handle examination；
S20. site clearing is restored heat exchange equipment (1), and manhole door etc. is closed；
S21. cleaning terminates.
Claims (2)
1. the cleaning device and its cleaning process of a kind of heat exchange equipment characterized by comprising by heat exchange equipment (1), cleaning solution
Container (2), cleaning liquid pool I (16), cleaning liquid pool II (18), centrifugal pump (7) centrifugal pump water inlet pipe (5), centrifugation water pump outlet pipe
(8), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), threeway (6) and its between connecting line composition, it is special
Sign is: can clean in batches, can carry out special emphasis cleaning for certain a part of serious heat exchanger tube of fouling, can save big
The cleaning solution of amount, cleaning speed is fast, short construction period, save the cost.
2. the cleaning device and its cleaning process of a kind of heat exchange equipment, which comprises the following steps:
S1. service sink I (16) and service sink II (18), connection centrifugal pump (7), centrifugation pump water inlet are set up in heat exchange equipment (1)
Manage (5), centrifugation water pump outlet pipe (8), soda liquor container pipe valve (3), centrifugal pump water inlet pipe pipe valve (4), threeway (6) and its between
Pipeline carries out electrical wiring；
S2. imported from America R-Levels brand cleaning agent and water are prepared into cleaning solution in 1:3 ratio in soda liquor container (2)；
S3. start centrifugal pump (7), the cleaning solution in soda liquor container (2) by soda liquor container pipe valve (3), threeway (6), into
Enter centrifugal pump (7), then be injected into cleaning liquid pool II (18) by centrifugation water pump outlet pipe (8), is filled when in cleaning liquid pool II (18)
It when cleaning solution, closes centrifugal pump (7), impregnates top heat exchanger tube (17)；
S4. after meeting soaking time, start centrifugal pump (7), continue to inject cleaning solution, cleaning solution will be in slightly lower left end rubber
Plate (13) top edge is overflowed, in the cleaning liquid pool I (16) of trickling to lower section, when the liquid level of cleaning liquid pool I (16) reaches certain height
It when spending, opens centrifugal pump water inlet pipe pipe valve (4), and closes soda liquor container pipe valve (3) immediately, cleaning solution will be from cleaning liquid pool
I (16), by centrifugal pump water inlet pipe (5), centrifugal pump water inlet pipe pipe valve (4), threeway (6), into centrifugal pump (7), then by centrifugal pump
Outlet pipe (8) is injected into cleaning liquid pool II (18), then trickles and return to cleaning liquid pool I (16) the formation circulation flushing of lower section；
S5. after cleaning effect passed examination, disassembly, cleaning liquid pool II (18) shifts be mounted on the next position in the same way, presses
It is cut in cleaning process by control soda liquor container according to S3 to S4 repeated washing in batches until whole heat exchanger tubes cleanings are completed
The opening and closing of door (3) and centrifugal pump water inlet pipe pipe valve (4), realize the switching of circulation line, and mend to the circulatory system
Fill cleaning solution；
S6. the pH value of test cleaning raffinate, according to result disposition and recovery and rinsing raffinate；
S7. it dismantles and takes out the cleaning device in heat exchange equipment (1)；
S8. clear water flushing heat exchanging pipe is used, it is desirable that each section is rinsed minimum 1 hour, was tested and is rinsed with PH test paper every 20 minutes
The pH value of liquid, until pH value=7；
S9. it hands over inspection, handle examination；
S10. site clearing is restored heat exchange equipment (1), and manhole door etc. is closed；
S11. cleaning terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293706.4A CN109827462B (en) | 2019-04-12 | 2019-04-12 | Cleaning device and cleaning process of heat exchange equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910293706.4A CN109827462B (en) | 2019-04-12 | 2019-04-12 | Cleaning device and cleaning process of heat exchange equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109827462A true CN109827462A (en) | 2019-05-31 |
| CN109827462B CN109827462B (en) | 2023-07-04 |
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ID=66875023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910293706.4A Active CN109827462B (en) | 2019-04-12 | 2019-04-12 | Cleaning device and cleaning process of heat exchange equipment |
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| Country | Link |
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| CN (1) | CN109827462B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110986660A (en) * | 2019-12-16 | 2020-04-10 | 平顶山金晶生物科技股份有限公司 | Cleaning agent and cleaning method for surface scale of heat exchange tube in concentration evaporation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005030633A1 (en) * | 2005-06-30 | 2007-01-04 | Hans Güntner GmbH | System for cleaning heat exchanger plates has a spray moved over the top of the heat exchanger block to reach all the plates |
| CN204514174U (en) * | 2015-01-30 | 2015-07-29 | 中核检修有限公司 | A kind of instrument for cleaning Water in Condenser cold wall pipe |
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| JP2017090022A (en) * | 2015-11-17 | 2017-05-25 | Ｊｆｅスチール株式会社 | Cleaning method and cleaning device of fin tube type heat exchanger |
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| Publication number | Publication date |
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| CN109827462B (en) | 2023-07-04 |
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