CN210833227U - Descaling device of heat exchanger - Google Patents
Descaling device of heat exchanger Download PDFInfo
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- CN210833227U CN210833227U CN201921545392.4U CN201921545392U CN210833227U CN 210833227 U CN210833227 U CN 210833227U CN 201921545392 U CN201921545392 U CN 201921545392U CN 210833227 U CN210833227 U CN 210833227U
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- pickling
- heat exchange
- exchange module
- descaling
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- 238000002161 passivation Methods 0.000 claims abstract description 120
- 238000005406 washing Methods 0.000 claims abstract description 58
- 239000002253 acid Substances 0.000 claims abstract description 32
- 230000002378 acidificating effect Effects 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 14
- 238000005554 pickling Methods 0.000 claims description 78
- 238000011010 flushing procedure Methods 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 22
- 238000004140 cleaning Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000000498 cooling water Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000008602 contraction Effects 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The utility model relates to a heat exchanger field discloses a scale removal device of heat exchanger. The heat exchanger (22) comprises a heat exchange module, and the descaling device of the heat exchanger (22) comprises: the physical descaling unit comprises a drying and heating module capable of drying and heating the heat exchange module and a washing module capable of washing the heat exchange module; and a chemical descaling unit comprising an acid wash module capable of rinsing the heat exchange module with an acidic descaling solution and a passivation module capable of rinsing the heat exchange module with a basic passivation solution. The descaling device of the heat exchanger can be used for descaling the heat exchanger by adopting two physical descaling methods and two chemical descaling methods, so that the descaling effect of the heat exchanger is obviously improved. And above-mentioned scale removal device can directly be connected with the heat exchange module of heat exchanger, can wash the heat exchange module high-efficiently under the condition of not dismantling the heat exchanger, and is easy and simple to handle, and the cleaning efficiency is high.
Description
Technical Field
The utility model relates to a heat exchanger field specifically relates to a scale removal device of heat exchanger.
Background
The heat exchanger is a device for realizing heat transfer of hot fluid and cold fluid, and is widely applied to the production of coal chemical industry and petrochemical industry. The heat exchangers in the coal-to-liquid chemical industry mostly adopt tube type heat exchangers, and circulating cooling water is used as a cold medium to exchange heat with a heat medium. Because the circulating cooling water contains substances such as metal ions, biological slime, algae and the like, the heat exchanger is easy to scale, when a scaling layer is formed in a heat exchange tube of the heat exchanger, the flow area is reduced, the resistance of the circulating cooling water in the flowing process is increased, the heat transfer coefficient of the heat exchange tube is reduced, the energy consumption is increased, and the heat exchanger cannot meet the cooling requirement and influences the normal production.
At present, when the heat exchanger is scaled, the heat exchanger which can be cut out independently (namely, the heat exchanger is disconnected with a production system) is generally subjected to high-pressure cleaning after the heat exchanger is cut out independently; for heat exchangers that cannot be cut out individually, cleaning can only be carried out while waiting for the plant to be shut down. The existing heat exchanger has the defects of large cleaning workload, long time consumption and poor cleaning effect, and influences the normal operation of the device to cause great economic loss.
Accordingly, it would be desirable to have a descaling device that overcomes or at least alleviates the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problems in the prior art and providing the descaling device of the heat exchanger, which has the advantages of high descaling efficiency and simple operation.
In order to achieve the above object, an aspect of the present invention provides a descaling device for a heat exchanger, the heat exchanger includes a heat exchange module, the descaling device for the heat exchanger includes: the physical descaling unit comprises a drying and heating module capable of drying and heating the heat exchange module and a washing module capable of washing the heat exchange module; and a chemical descaling unit comprising an acid wash module capable of rinsing the heat exchange module with an acidic descaling solution and a passivation module capable of rinsing the heat exchange module with a basic passivation solution.
Preferably, the drying and heating module comprises a hot air blower set.
Preferably, the flushing module comprises a flushing water tank, a flushing pump and a flushing filter, wherein an outlet of the flushing water tank is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the flushing filter, an outlet of the flushing filter is connected with an inlet of the flushing water tank, and the flushing pump pumps flushing water to circularly flow in the flushing water tank, the heat exchange module and the flushing filter.
Preferably, the pickling module comprises a pickling solution tank, a pickling pump and a pickling filter, wherein an outlet of the pickling solution tank is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the pickling filter, an outlet of the pickling filter is connected with an inlet of the pickling solution tank, and the pickling pump pumps acidic descaling solution to flow in the pickling solution tank, the heat exchange module and the pickling filter in a circulating manner.
Preferably, the passivation module comprises a passivation solution tank, a passivation pump and a passivation filter, wherein an outlet of the passivation solution tank is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the passivation filter, an outlet of the passivation filter is connected with an inlet of the passivation solution tank, and the passivation pump pumps an alkaline passivation solution to circularly flow in the passivation solution tank, the heat exchange module and the passivation filter.
Preferably, the descaling device includes parallelly arranged wash branch road, pickling branch road and passivation branch road, wash the filter with wash the basin along the flow direction of sparge water establish ties in proper order in wash the branch road, the pickling filter with the flow direction of pickling solution groove along acid scale removal solution establish ties in proper order in the pickling branch road, the passivation filter with the passivation solution groove along the flow direction of alkaline passivation solution establish ties in proper order in the passivation branch road, wherein, wash the entry end of branch road the entry end of pickling branch road with the entry end of passivation branch road through first pipeline with the exit linkage of heat exchange module, wash the exit end of branch road the exit end of pickling branch road with the exit end of passivation branch road through the second pipeline with the entry linkage of heat exchange module.
Preferably, the inlet end department that washes the branch road is provided with washes the inlet valve, the outlet end department that washes the branch road is provided with washes the outlet valve, the inlet end department of pickling branch road is provided with the pickling inlet valve, the outlet end department of pickling branch road is provided with the pickling outlet valve, the inlet end department of passivation branch road is provided with the passivation inlet valve, the outlet end department of passivation branch road is provided with the passivation outlet valve.
Preferably, a drain valve, a regulating valve and/or a pressure gauge are/is arranged on the second pipeline.
Preferably, the first pipeline is provided with a vent valve and/or a thermometer.
Preferably, centrifugal pumps are arranged on the second pipeline and are used as the flushing pump, the pickling pump and the passivation pump.
Through the technical scheme, the descaling device of the heat exchanger can be used for descaling the heat exchanger by adopting two physical descaling methods and two chemical descaling methods, so that the descaling effect of the heat exchanger is obviously improved. And above-mentioned scale removal device can directly be connected with the heat exchange module of heat exchanger, can wash the heat exchange module high-efficiently under the condition of not dismantling the heat exchanger, and is easy and simple to handle, and the cleaning efficiency is high, effectively reduces intensity of labour and saves labour time, does not influence the normal operating of equipment moreover.
Drawings
Fig. 1 is a schematic view of a descaling device for a heat exchanger according to an embodiment of the present invention.
Description of the reference numerals
1-flushing water tank, 2-pickling solution tank, 3-passivating solution tank, 4-flushing outlet valve, 5-pickling outlet valve, 6-passivating outlet valve, 7-flushing inlet valve, 8-pickling inlet valve, 9-passivating inlet valve, 10-flushing filter, 11-pickling filter, 12-passivating filter, 13-blow-down valve, 14-centrifugal pump, 15-pressure gauge, 16-regulating valve, 17-hot air machine set, 18-hot air valve, 19-thermometer, 20-emptying valve, 21-liquid discharge port, 22-heat exchanger, 23-working medium inlet, 24-working medium outlet, 25-first pipeline and 26-second pipeline.
Detailed Description
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
The utility model provides a scale removal device of heat exchanger, see figure 1, heat exchanger 22 includes heat exchange module, and the scale removal device of heat exchanger 22 includes: the physical descaling unit comprises a drying and heating module capable of drying and heating the heat exchange module and a washing module capable of washing the heat exchange module; and a chemical descaling unit comprising an acid wash module capable of rinsing the heat exchange module with an acidic descaling solution and a passivation module capable of rinsing the heat exchange module with a basic passivation solution.
The descaling device of the heat exchanger comprises a physical descaling unit and a chemical descaling unit, and two physical descaling methods and a chemical descaling method can be successively adopted to descale the heat exchanger, so that the descaling effect of the heat exchanger is obviously improved. And above-mentioned scale removal device can directly be connected with the heat exchange module of heat exchanger, can wash the heat exchange module high-efficiently under the condition of not dismantling the heat exchanger, and is easy and simple to handle, and the cleaning efficiency is high, effectively reduces intensity of labour and saves labour time, does not influence the normal operating of equipment moreover.
Specifically, the drying and heating module of the physical descaling unit dries and heats the water scale in the heat exchange module, so that the water scale is loosened, dispersed and dropped under the action of thermal expansion and cold contraction, and is washed out by the washing module. And then the chemical descaling unit pickle-cleans the heat exchange module through a pickling module to dissolve water scale under acidic conditions, the water scale flows out of the heat exchange module along with the acidic descaling solution, and then the heat exchange module is passivated and protected through a passivation module, so that the service life of the heat exchange module is prolonged.
The specific type of the drying and heating module can be properly selected according to actual needs, so that the heat exchange module can be dried and heated. Preferably, the drying and heating module comprises a hot air unit 17, and the hot air unit 17 dries and heats the heat exchange module simultaneously through hot air, so that the scale is loosened, dispersed and dropped under the action of thermal expansion and cold contraction.
The specific structure of the washing module can be properly selected according to actual needs, preferably, the washing module comprises a washing water tank 1, a washing pump and a washing filter 10, wherein an outlet of the washing water tank 1 is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the washing filter 10, an outlet of the washing filter 10 is connected with an inlet of the washing water tank 1, the washing pump pumps washing water to circularly flow in the washing water tank 1, the heat exchange module and the washing filter 10, and the washing water which has washed the heat exchange module is continuously used after impurities are filtered by the washing filter 10, so that the use cost of the descaling device is reduced, and energy is saved.
The acid cleaning module dissolves dirt in the heat exchange module through the acid descaling solution, and enables the dissolved dirt to be discharged along with the acid descaling solution, and the specific structure of the acid cleaning module can be properly selected according to actual needs, preferably, the acid cleaning module comprises an acid cleaning solution tank 2, an acid cleaning pump and an acid cleaning filter 11, wherein an outlet of the acid cleaning solution tank 2 is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the acid cleaning filter 11, an outlet of the acid cleaning filter 11 is connected with an inlet of the acid cleaning solution tank 2, the acid cleaning pump pumps the acid descaling solution to circularly flow in the acid cleaning solution tank 2, the heat exchange module and the acid cleaning filter 11, and the acid descaling solution which is washed by the heat exchange module is filtered by the acid cleaning filter 11 and then continuously used, so that the use cost of the descaling device is reduced. Wherein, because the PH value of the acidic descaling solution is increased after reacting with the fouling in the heat exchange module, the PH value in the pickling solution tank 2 needs to be measured periodically during the pickling process, and if the PH value is increased, a descaling agent is added into the pickling solution tank 2, so that the PH value in the pickling solution tank 2 is maintained in a required value range, for example, the PH value is maintained between 1 and 2.
The specific type of the acidic descaling solution can be properly selected according to actual needs, and the acidic descaling solution can effectively remove dirt in the heat exchange module, for example, the acidic descaling solution is prepared by mixing oxalic acid and water in proportion.
After the heat exchange module is subjected to acid washing and water washing, the metal surface is very clean and activated and is easily corroded, and passivation treatment is performed through the passivation module, so that a protective film is generated on the cleaned metal surface, and corrosion is slowed down. The specific structure of the passivation module can be properly selected according to actual needs, and preferably, the passivation module comprises a passivation solution tank 3, a passivation pump and a passivation filter 12, wherein an outlet of the passivation solution tank 3 is connected with an inlet of the heat exchange module, an outlet of the heat exchange module is connected with an inlet of the passivation filter 12, an outlet of the passivation filter 12 is connected with an inlet of the passivation solution tank 3, the passivation pump pumps an alkaline passivation solution to circularly flow in the passivation solution tank 3, the heat exchange module and the passivation filter 12, dirt remained in the heat exchange module by the pickling module is flushed out of the heat exchange module together, the alkaline passivation solution flushed through the heat exchange module is filtered by the passivation filter 12 and then is continuously used, the use cost of the descaling device is reduced, and energy is saved. Since the PH value of the alkaline passivation solution is reduced after the alkaline passivation solution reacts with the acidic descaling solution remaining in the heat exchange module, the PH value in the passivation solution tank 3 needs to be measured periodically during passivation, and if the PH value is reduced, the passivation agent is added into the passivation solution tank 3, so that the PH value in the passivation solution tank 3 is maintained in a required value range, for example, the PH value is maintained between 10 and 11.
The specific type of the alkaline passivation solution can be properly selected according to actual needs, for example, the alkaline passivation solution is formed by mixing water and alkali liquor in proportion and adding sodium nitrite.
When the washing water, the acidic descaling agent and the alkaline descaling agent are used for descaling the circulating cooling water pipeline of the heat exchange module, the production system provided with the heat exchanger 22 can normally carry out production operation, and the washing water, the acidic descaling agent and the alkaline descaling agent can be used as cooling liquid to exchange heat with working media.
The concrete pipeline structure of the descaling device can be properly designed according to actual needs, for example, the drying and heating module, the washing module, the pickling module and the passivation module are respectively connected with the inlet and the outlet of the heat exchange module through mutually independent pipelines, regulating valves are arranged at the inlet and the outlet of the heat exchange module, the regulating valves select the heat exchange module to be communicated with the drying and heating module, the washing module, the pickling module or the passivation module according to the use needs, but the pipeline structure of the descaling device is complex and the size of the descaling device is large due to the structure. Preferably, the descaling device comprises a washing branch, an acid washing branch and a passivation branch which are arranged in parallel, a washing filter 10 and a washing water tank 1 are sequentially connected in series with the washing branch along the flowing direction of washing water, a acid washing filter 11 and a acid washing solution tank 2 are sequentially connected in series with the acid washing branch along the flowing direction of an acid descaling solution, and a passivation filter 12 and a passivation solution tank 3 are sequentially connected in series with the passivation branch along the flowing direction of an alkaline passivation solution, wherein the inlet end of the washing branch, the inlet end of the acid washing branch and the inlet end of the passivation branch are connected with the outlet of the heat exchange module through a first pipeline 25, the outlet end of the washing branch, the outlet end of the acid washing branch and the outlet end of the passivation branch are connected with the inlet of the heat exchange module through a second pipeline 26, so that the pipeline structure of the descaling device is effectively, the arrangement of the descaling device is convenient.
Further, the entry end department that washes the branch road is provided with washes inlet valve 7, the exit end department that washes the branch road is provided with washes outlet valve 4, the entry end department of pickling branch road is provided with pickling inlet valve 8, the exit end department of pickling branch road is provided with pickling outlet valve 5, the entry end department of passivation branch road is provided with passivation inlet valve 9, the exit end department of passivation branch road is provided with passivation outlet valve 6, can carry out independent control to each valve as required to more nimble control scale removal device.
If the filtered washing water, the acidic descaling solution and/or the alkaline passivation solution contains large impurities and cannot be used continuously, the filtered washing water, the acidic descaling solution and/or the alkaline passivation solution can be directly discharged and replaced by new washing water, acidic descaling solution and/or alkaline passivation solution, and accordingly, the blow-down valves can be arranged on the washing water tank 1, the pickling solution tank 2 and the passivation solution tank 3, or the blow-down valves 13 are arranged on the second pipelines 26, and when the washing water tank 1, the pickling solution tank 2 or the passivation solution tank 3 needs to be blown down, the blow-down valves 13 and the corresponding washing outlet valves 4, the pickling outlet valves 5 or the passivation outlet valves 6 are only required to be opened.
In addition, the second pipeline 26 is preferably provided with a regulating valve 16 and a pressure gauge 15, the pressure gauge 15 can detect the pressure in the pipeline in real time, and the regulating valve 16 is used for the pressure and the flow in the pipeline so as to maintain normal production.
Preferably, the first pipeline 25 is provided with an air release valve 20, and hot air blown by the hot air unit 17 passes through the heat exchange module and then is directly discharged through the air release valve 20. Further, a thermometer 19 is disposed on the first pipeline 25 to detect the temperature of the hot air exhausted after passing through the heat exchange module in real time, so as to detect the heating condition of the heat exchange module.
Preferably, the centrifugal pump 14 is arranged on the second pipeline 26, the centrifugal pump 14 is used as the flushing pump, the pickling pump and the passivation pump, and only one centrifugal pump 14 is arranged, so that the number of devices of the descaling device is reduced, and the cost of the descaling device is reduced.
The descaling process of the preferred descaling device according to the present invention will be described with reference to fig. 1, wherein the heat exchanger 22 in the illustrated embodiment is a tube heat exchanger (the descaling device can also be connected to other suitable types of heat exchangers according to the use requirement), and the physical descaling unit and the chemical descaling unit of the descaling device are connected to the circulating cooling water pipeline of the heat exchange module of the heat exchanger 22, so that the descaling can be performed without disassembling the heat exchange module. The specific descaling process is as follows:
firstly, cutting off circulating cooling water of a heat exchanger 22, keeping a process medium inlet 23 and a process medium outlet 24 smooth, and opening a drain valve 21 to drain accumulated water in the heat exchanger 22;
secondly, opening a hot blast valve 18, starting a hot blast unit 17 to dry and heat the heat exchange module, only opening an emptying valve 20 during heating, disconnecting a washing branch, a pickling branch and a passivation branch, and monitoring the drying and heating degree of the heat exchange module by a thermometer 19;
thirdly, after heating to a preset temperature and heating for a preset time, closing the hot air unit 17, the hot air valve 18 and the emptying valve 20, opening the flushing inlet valve 7 and the flushing outlet valve 4 on the flushing branch, starting the flushing filter 10 and the centrifugal pump 14, wherein the scales are loosened, dispersed or fallen off under the action of expansion caused by heat and contraction caused by cold due to different speeds of the heat exchange module and the scales caused by heat and contraction caused by cold, flushing the scales away by using flushing water, circularly filtering the flushed scales through the flushing filter 10, and recycling the filtered flushing water into the flushing water tank 1 for circular use so as to realize circular physical descaling;
and fourthly, after the preset time of flushing, closing the flushing inlet valve 7 and the flushing outlet valve 4 on the flushing branch, and closing the flushing filter 10 and the centrifugal pump 14 to finish the physical descaling step.
Fifthly, adding an acidic descaling solution into the pickling solution tank 2, opening a pickling inlet valve 8 and a pickling outlet valve 5 on a pickling branch, starting a pickling filter 11 and a centrifugal pump 14, conveying the acidic descaling solution to the heat exchange module through a pipeline, dissolving dirt in the heat exchange module, filtering the acidic descaling solution output from the heat exchange module through the pickling filter 11, and recycling the acidic descaling solution into the pickling solution tank 2 to realize circulating chemical descaling;
sixthly, after pickling for a preset time, closing a pickling inlet valve 8 and a pickling outlet valve 5 on a pickling branch, and closing a pickling filter 11 and a centrifugal pump 14 to finish the pickling step;
seventhly, adding an alkaline passivation solution into the passivation solution tank 3, opening a passivation inlet valve 8 and a passivation outlet valve 6 on a passivation branch, starting a passivation filter 12 and a centrifugal pump 14, conveying the alkaline passivation solution to the heat exchange module through a pipeline, flushing and neutralizing residual acidic scale remover and dirt in the heat exchange module, filtering the alkaline passivation solution output from the heat exchange module through the passivation filter 12, and recycling the alkaline passivation solution into the passivation solution tank 3 for cyclic passivation to realize cyclic passivation;
and seventhly, after the passivation preset time, completing passivation protection on the heat exchange module, closing the passivation inlet valve 8 and the passivation outlet valve 6 on the passivation branch, closing the passivation filter 12 and the centrifugal pump 14, and completing descaling on the heat exchanger 22.
The predetermined temperature increased in the above steps, and the predetermined time for the heat drying process, the rinsing process, the acid washing process, and the passivation process may be appropriately selected according to the need for descaling and the need for production work.
It should be noted that whether the process medium inlet 23 and the process medium outlet 24 in the first step are unblocked can be appropriately selected according to actual production requirements. Because, in the second step, when the hot air unit 17 is used for drying and heating the cooling water circulation pipeline, the heat exchange module is used for normally cooling the working medium, so that the temperature of the working medium is increased, if the production system provided with the heat exchanger cannot tolerate the short-time temperature rise, the heat exchanger needs to be descaled after production is stopped, namely the process medium inlet 23 and the process medium outlet 24 need to be disconnected, so that the production operation of the production system is influenced by short time, and the process medium inlet 23 and the process medium outlet 24 can be recovered to be smooth after the heating step of the drying and heating module is completed; if the production system provided with the heat exchanger can tolerate the short-time temperature rise, the heat exchanger can be descaled under the condition that the production system normally runs, the process medium inlet 23 and the process medium outlet 24 are kept smooth, and the production operation of the production system is not influenced completely.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. A descaling device for a heat exchanger, characterized in that the heat exchanger (22) comprises a heat exchange module, and the descaling device for the heat exchanger (22) comprises:
the physical descaling unit comprises a drying and heating module capable of drying and heating the heat exchange module and a washing module capable of washing the heat exchange module; and
a chemical descaling unit comprising an acid wash module capable of rinsing the heat exchange module with an acidic descaling solution and a passivation module capable of rinsing the heat exchange module with a basic passivation solution.
2. The descaling device of the heat exchanger according to claim 1, wherein the drying and heating module comprises a hot air blower set (17).
3. The descaling device of the heat exchanger according to claim 1, wherein the flushing module comprises a flushing water tank (1), a flushing pump and a flushing filter (10), wherein the outlet of the flushing water tank (1) is connected with the inlet of the heat exchange module, the outlet of the heat exchange module is connected with the inlet of the flushing filter (10), the outlet of the flushing filter (10) is connected with the inlet of the flushing water tank (1), and the flushing pump pumps the flushing water to circulate in the flushing water tank (1), the heat exchange module and the flushing filter (10).
4. The descaling device of the heat exchanger according to claim 3, wherein the pickling module comprises a pickling solution tank (2), a pickling pump and a pickling filter (11), wherein the outlet of the pickling solution tank (2) is connected with the inlet of the heat exchange module, the outlet of the heat exchange module is connected with the inlet of the pickling filter (11), the outlet of the pickling filter (11) is connected with the inlet of the pickling solution tank (2), and the pickling pump pumps an acidic descaling solution to circulate in the pickling solution tank (2), the heat exchange module and the pickling filter (11).
5. The descaling device of the heat exchanger according to claim 4, wherein the passivation module comprises a passivation solution tank (3), a passivation pump and a passivation filter (12), wherein the outlet of the passivation solution tank (3) is connected with the inlet of the heat exchange module, the outlet of the heat exchange module is connected with the inlet of the passivation filter (12), the outlet of the passivation filter (12) is connected with the inlet of the passivation solution tank (3), and the passivation pump pumps an alkaline passivation solution to circulate in the passivation solution tank (3), the heat exchange module and the passivation filter (12).
6. The descaling device of the heat exchanger according to claim 5, wherein the descaling device comprises a washing branch, a pickling branch and a passivation branch which are arranged in parallel, the washing filter (10) and the washing water tank (1) are sequentially connected in series with the washing branch along the flow direction of the washing water, the pickling filter (11) and the pickling solution tank (2) are sequentially connected in series with the pickling branch along the flow direction of the acidic descaling solution, and the passivation filter (12) and the passivation solution tank (3) are sequentially connected in series with the passivation branch along the flow direction of the basic passivation solution, wherein the inlet end of the washing branch, the inlet end of the pickling branch and the inlet end of the passivation branch are connected with the outlet of the heat exchange module through a first pipeline (25), and the outlet end of the washing branch, the outlet end of the pickling branch and the outlet end of the passivation branch are connected with the heat exchange module through a second pipeline (26) The inlets of the modules are connected.
7. Descaling device of heat exchanger according to claim 6, wherein the inlet end of the flushing branch is provided with a flushing inlet valve (7), the outlet end of the flushing branch is provided with a flushing outlet valve (4), the inlet end of the pickling branch is provided with a pickling inlet valve (8), the outlet end of the pickling branch is provided with a pickling outlet valve (5), the inlet end of the passivating branch is provided with a passivating inlet valve (9), and the outlet end of the passivating branch is provided with a passivating outlet valve (6).
8. Descaling device for heat exchangers according to claim 6, wherein the second line (26) is provided with a blowdown valve (13), a regulating valve (16) and/or a pressure gauge (15).
9. Descaling device for heat exchangers according to claim 6, wherein a vent valve (20) and/or a thermometer (19) is/are provided on the first line (25).
10. The descaling device of heat exchanger according to any one of claims 6-9, wherein a centrifugal pump (14) is disposed on the second pipeline (26), and the centrifugal pump (14) is used as the flushing pump, the pickling pump and the passivation pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545392.4U CN210833227U (en) | 2019-09-17 | 2019-09-17 | Descaling device of heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921545392.4U CN210833227U (en) | 2019-09-17 | 2019-09-17 | Descaling device of heat exchanger |
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| CN210833227U true CN210833227U (en) | 2020-06-23 |
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| CN201921545392.4U Active CN210833227U (en) | 2019-09-17 | 2019-09-17 | Descaling device of heat exchanger |
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| CN (1) | CN210833227U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578775A (en) * | 2020-04-26 | 2020-08-25 | 国家能源集团宁夏煤业有限责任公司 | Descaling device and descaling method for tube type heat exchanger |
| CN113091504A (en) * | 2021-03-24 | 2021-07-09 | 北京新能源汽车技术创新中心有限公司 | Heat exchanger cleaning method, device, control method and fuel cell cooling device |
| RU219759U1 (en) * | 2022-12-31 | 2023-08-03 | Общество с ограниченной ответственностью "Газпром трансгаз Казань" | Device for flushing the heat exchanger of a gas appliance |
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2019
- 2019-09-17 CN CN201921545392.4U patent/CN210833227U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578775A (en) * | 2020-04-26 | 2020-08-25 | 国家能源集团宁夏煤业有限责任公司 | Descaling device and descaling method for tube type heat exchanger |
| CN113091504A (en) * | 2021-03-24 | 2021-07-09 | 北京新能源汽车技术创新中心有限公司 | Heat exchanger cleaning method, device, control method and fuel cell cooling device |
| RU219759U1 (en) * | 2022-12-31 | 2023-08-03 | Общество с ограниченной ответственностью "Газпром трансгаз Казань" | Device for flushing the heat exchanger of a gas appliance |
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