CN110360871B - Off-line cleaning device for air preheater and working method thereof - Google Patents
Off-line cleaning device for air preheater and working method thereof Download PDFInfo
- Publication number
- CN110360871B CN110360871B CN201910553966.0A CN201910553966A CN110360871B CN 110360871 B CN110360871 B CN 110360871B CN 201910553966 A CN201910553966 A CN 201910553966A CN 110360871 B CN110360871 B CN 110360871B
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- fixedly connected
- heat exchange
- cleaning
- air preheater
- water
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- 238000004140 cleaning Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 238000004804 winding Methods 0.000 claims abstract description 28
- 238000005406 washing Methods 0.000 claims abstract description 26
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000007921 spray Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 3
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 230000001680 brushing effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007605 air drying Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000000861 blow drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Air Supply (AREA)
Abstract
The invention discloses an off-line cleaning device of an air preheater and a working method thereof, wherein the off-line cleaning device comprises a bottom plate and a cleaning pool, the top of the bottom plate is fixedly connected with a fixed column, the top of the fixed column is movably connected with a fixed block through a bearing, the surface of the fixed block is fixedly connected with a supporting rod, the end part of the supporting rod is fixedly connected with an annular shell, the bottom of the annular shell is fixedly connected with a motor, and a power output shaft of the motor is fixedly connected with a winding roller. This air preheater off-line belt cleaning device drives the winding roller through the motor and rotates, can mention heat transfer component, utilizes annular casing to transport the top of wasing the pond, utilizes first shower nozzle to spout with containing alkaline material water, and the reuse brush is scrubbed, utilizes the second shower nozzle to wash heat transfer component with the clear water, utilizes the fan to blow dry with hot-blast after the washing to can clear up the ammonium bisulfate scale on the heat transfer component, improved the speed of clearance.
Description
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to an off-line cleaning device for an air preheater.
Background
After the existing boiler denitration equipment is put into operation, NH is generated due to the problems of ammonia escape and the like 4 HSO 4 The problem of serious blockage of the air preheater is caused, under the condition of 660MW of unit load, the smoke side difference is about 1600Pa, but after 8 months of operation, the smoke side differential pressure of the air preheater is increased to 4500Pa, the differential pressure is increased rapidly, the differential pressure of the air preheater is increased rapidly, the negative pressure in an air smoke system is caused to be overlarge, the safe and stable operation of boiler equipment is seriously influenced, the blockage of the air preheater leads to the increase of fan current, the temperature of fresh air primary air and secondary air is caused to be too low, the energy saving and the smoke discharging temperature are caused to be increased, the load carrying capacity of the unit is influenced, and therefore, the unit is required to be stopped for flushing heat exchange elements, such as the applicationThe Chinese patent No. 201820146071.6 discloses an off-line cleaning device for an air preheater, which has relatively poor soot blowing and cleaning effects, and general cleaning effects, so that ammonium bisulfate scale cannot be thoroughly cleaned.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an off-line cleaning device for an air preheater, which has the advantage of good cleaning effect and solves the problem of defects of the existing cleaning device for the air preheater.
The invention solves the problems by adopting the following technical scheme: the utility model provides an air preheater off-line belt cleaning device, includes bottom plate and washs the pond, its characterized in that: the top of the bottom plate is fixedly connected with a fixed column, the top end of the fixed column is movably connected with a fixed block through a bearing, the surface of the fixed block is fixedly connected with a supporting rod, the end part of the supporting rod is fixedly connected with an annular shell, the bottom of the annular shell is fixedly connected with a motor, a power output shaft of the motor is fixedly connected with a winding roller, the surface of the winding roller is wound with a steel wire rope, and the bottom end of the steel wire rope is fixedly connected with a grapple; the inside fixedly connected with first baffle in washing pond, the middle part fixedly connected with dead lever in washing pond, the top of dead lever is through bearing swing joint has the washing frame, the inside one side fixedly connected with first water pump in washing pond, the inside opposite side fixedly connected with second water pump in washing pond, the back fixedly connected with play tuber pipe in washing pond, the first water pipe of top fixedly connected with of first water pump, the first shower nozzle of one end fixedly connected with of first water pump is kept away from to first water pipe, the top fixedly connected with second water pipe of second water pump, the one end fixedly connected with second shower nozzle of second water pump is kept away from to the second water pipe, the top fixedly connected with air-out shower nozzle of play tuber pipe, the bottom of play tuber pipe is through connecting pipe fixedly connected with fan, one side of fan is through pipeline fixedly connected with heating cabinet, the inside fixedly connected with heating pipe of heating cabinet.
Preferably, the number of the supporting rods and the number of the motors are multiple, and the motors are arranged at the bottom of the annular shell in an annular array mode.
Preferably, the quantity of first baffle is three, and three first baffle is annular array setting in the inside of wasing the pond, and is three first baffle equally divide into three region with wasing the pond, and is three the region is crude wash tank, fine wash tank and water receiving pond respectively, first water pump is located crude wash tank, the second water pump is located the fine wash tank, the play tuber pipe is located the outside in water receiving pond, the lateral wall bottom in crude wash tank, fine wash tank and water receiving pond is fixedly connected with blowoff valve respectively.
Preferably, the bottom of the cleaning frame is in a grid shape, and three second partition plates are uniformly and fixedly connected in the cleaning frame.
Preferably, the first water pipe and the second water pipe are fixedly connected with the inner wall of the cleaning tank, and one ends of the first water pipe and the second water pipe are provided with control valves.
Preferably, an air inlet is fixedly connected to one side of the heating box, and a heating wire is wound on the surface of the heating pipe.
The working method of the off-line cleaning device of the air preheater is characterized by comprising the following steps of: the process is as follows: the operation of the air preheater is stopped, a plurality of heat exchange elements are uniformly arranged in the air preheater, gaps among the plurality of heat exchange elements are arranged after the air preheater is operated for a period of time, when the pressure difference of the air preheater reaches a certain set value, ammonium bisulfate scale can be slowly blocked in the gaps among the plurality of heat exchange elements, the heat exchange elements are required to be taken out from the air preheater equipment for cleaning, a winding roller is driven by a motor to rotate, so that the winding roller drives a grapple at the bottom end of a steel wire rope to move up and down, the grapple hooks the heat exchange elements in the air preheater, the winding roller is driven by the motor to rotate, the steel wire rope lifts the heat exchange elements, the annular shell is rotated, the heat exchange elements are transported to the upper part of a rough cleaning tank of the cleaning tank, the steel wire rope and the grapple are driven by the winding roller to be placed in the cleaning frame above the rough cleaning tank, and the interior of the fine cleaning tank are respectively provided with water containing alkaline materials, the first water pump is utilized to convey the water containing the alkaline material into the first water pipe, so that the first spray head is used for flushing the heat exchange element, the alkaline material can be sprayed on the ammonium bisulfate scale at the blocking position, the ammonium bisulfate scale reacts with the alkaline material to generate the ammonium bisulfate scale, the adhesion force of the ammonium bisulfate scale is not strong, thereby being convenient for cleaning impurities, the brush is utilized to brush, then the cleaning frame is rotated, the heat exchange element is rotated to the upper part of the fine cleaning tank, the clean water is pumped out by the second water pump, the clean water is flushed by the second spray head, the cleaning frame is rotated after flushing, the heat exchange element is positioned above the water receiving tank, the hot air in the heating tank is pumped out by the fan, the air outlet spray head is used for carrying out hot air blow-drying on the heat exchange element, the water on the heat exchange element can be dripped into the water receiving tank, after the heat exchange element is dried, the cleaning frame is rotated, the heat exchange element is located below the grapple, the motor is used for driving the winding roller to rotate, and then the grapple is used for lifting the heat exchange element, the annular shell is rotated, the annular shell conveys the heat exchange element to the upper side of the air preheater, and then the motor is used for driving the winding roller to rotate, the heat exchange element is placed into the air preheater, the operation is repeated, the plurality of heat exchange elements are comprehensively cleaned, when the grapple is used for extracting the heat exchange element, the plurality of grapples can be used for extracting one heat exchange element, then each heat exchange element is cleaned, the circulation operation can be performed, the working efficiency can be improved, the cleaning frame is a grid water-leaking type, so that when the thickness and the finish cleaning are performed, water sprayed out by the first spray head and the second spray head is circulation water, the waste of resources is avoided, and sewage after the use is discharged through the sewage discharging valve.
Compared with the prior art, the invention has the following advantages and effects: according to the off-line cleaning device for the air preheater, the winding roller is driven to rotate through the motor, the heat exchange element can be lifted, the annular shell is utilized to be transported to the upper side of the cleaning pool, the alkaline material-containing water is sprayed out through the first spray head, the brush is used for brushing, the heat exchange element is washed with clean water through the second spray head, and the fan is utilized to blow the heat exchange element to dry the heat exchange element with hot air after washing, so that ammonium bisulfate scale on the heat exchange element can be cleaned, the cleaning speed is improved, the cleaning quality is guaranteed, and the cleaning device is good in cleaning effect, convenient to use and suitable for popularization and use.
Drawings
FIG. 1 is a principal cross-sectional view of the structure of the present invention;
FIG. 2 is a bottom view of the annular housing structure of the present invention;
FIG. 3 is a top view of the structure of the cleaning tank of the present invention;
FIG. 4 is a top view of a cleaning frame structure of the present invention;
fig. 5 is a view showing the state of use of the device of the present invention.
In the figure: the cleaning device comprises a bottom plate 1, a cleaning tank 2, a rough cleaning tank 201, a fine cleaning tank 202, a water receiving tank 203, a fixed column 3, a fixed block 4, a supporting rod 5, an annular shell 6, a motor 7, a winding roller 8, a steel wire rope 9, a grapple 10, a first partition plate 11, a fixed rod 12, a cleaning frame 13, a second partition plate 1301, a first water pump 14, a second water pump 15, an air outlet pipe 16, a first water pipe 17, a first spray head 18, a second water pipe 19, a second spray head 20, an air outlet spray head 21, a fan 22, a heating box 23, a heating pipe 24, an air preheater 25 and a heat exchange element 2501.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1-5, the offline cleaning device of the air preheater in this embodiment includes a bottom plate 1 and a cleaning tank 2, wherein a fixed column 3 is fixedly connected to the top of the bottom plate 1, a fixed block 4 is movably connected to the top of the fixed column 3 through a bearing, a supporting rod 5 is fixedly connected to the surface of the fixed block 4, an annular shell 6 is fixedly connected to the end of the supporting rod 5, a motor 7 is fixedly connected to the bottom of the annular shell 6, a winding roller 8 is fixedly connected to a power output shaft of the motor 7, a steel wire rope 9 is wound on the surface of the winding roller 8, and a grapple 10 is fixedly connected to the bottom of the steel wire rope 9; the inside fixedly connected with first baffle 11 of wash pond 2, the middle part fixedly connected with dead lever 12 of wash pond 2, the top of dead lever 12 is through bearing swing joint washing frame 13, the inside one side fixedly connected with first water pump 14 of wash pond 2, the inside opposite side fixedly connected with second water pump 15 of wash pond 2, the back fixedly connected with play tuber pipe 16 of wash pond 2, the first water pipe 17 of top fixedly connected with of first water pump 14, the one end fixedly connected with first shower nozzle 18 of first water pipe 17 keeping away from first water pump 14, the top fixedly connected with second water pipe 19 of second water pump 15, the one end fixedly connected with second shower nozzle 20 of second water pipe 19 keeping away from second water pump 15, the top fixedly connected with air-out shower nozzle 21 of play tuber pipe 16, the bottom of play tuber pipe 16 is through connecting pipe fixedly connected with fan 22, one side of fan 22 is through pipeline fixedly connected with heating cabinet 23, the inside fixedly connected with heating pipe 24 of heating cabinet 23.
The number of the supporting rods 5 and the number of the motors 7 are multiple, the motors 7 are arranged at the bottom of the annular shell 6 in an annular array, and the motors 7 are arranged to circularly take out the heat exchange elements 2501, so that the cleaning process can be continuously carried out; the number of the first partition plates 11 is three, the three first partition plates 11 are arranged in the cleaning tank 2 in an annular array, the cleaning tank 2 is evenly divided into three areas by the three first partition plates 11, the three areas are respectively a rough cleaning tank 201, a fine cleaning tank 202 and a water receiving tank 203, the first water pump 14 is positioned in the rough cleaning tank 201, the second water pump 15 is positioned in the fine cleaning tank 202, the air outlet pipe 16 is positioned at the outer side of the water receiving tank 203, and through the arrangement of the rough cleaning tank 201, the fine cleaning tank 202 and the water receiving tank 203, rough cleaning, fine cleaning and drying can be carried out on the heat exchange element 2501; the bottom ends of the outer side walls of the rough washing tank 201, the fine washing tank 202 and the water receiving tank 203 are respectively and fixedly connected with a drain valve, and the drain valves are convenient for discharging sewage; the bottom of the cleaning frame 13 is in a grid shape, so that the outflow of the liquid after flushing is facilitated, three second partition plates 1301 are uniformly and fixedly connected in the cleaning frame 13, and the second partition plates 1301 can separate heat exchange elements 2501 which are being cleaned and sanitary; the first water pipe 17 and the second water pipe 19 are fixedly connected with the inner wall of the cleaning tank 2, and one ends of the first water pipe 17 and the second water pipe 19 are provided with control valves which can control the flow; one side fixedly connected with air intake of heating cabinet 23 is favorable to the flow of gas, and the surface winding of heating pipe 24 has the heater strip, can carry out rapid heating to gas to improve air-drying efficiency.
The electrical components are all connected with an external main controller and 220V mains supply, and the main controller can be conventional known equipment for controlling a computer and the like.
When the air preheater 25 is in use, the air preheater 25 stops running, the air preheater 25 is in a cylindrical shape, and in operation, the air preheater slowly rotates around a central shaft, which is a common sense knowledge which is clearly understood by a person skilled in the art, the inside of the air preheater 25 is uniformly provided with a plurality of heat exchange elements 2501, after the air preheater 25 runs for a period of time, when the pressure difference of the air preheater 25 reaches 110-130% of a rated value after a certain set value, ammonium bisulfate scale is slowly blocked in the gaps between the plurality of heat exchange elements 2501, the heat exchange elements 2501 are required to be taken out from the air preheater, the heat exchange elements 2501 are cleaned, the winding roller 8 is driven to rotate by the motor 7, so that the grapple 10 at the bottom end of the steel wire rope 9 is driven by the winding roller 8 to move up and down, the heat exchange elements 2501 in the air preheater 25 are hooked by the grapple 10, the heat exchange elements 2501 are driven to rotate by the motor 7, and the steel wire rope 9 is lifted, the annular shell 6 is rotated to enable the heat exchange element 2501 to be transported to the upper part of the rough washing tank 201 of the washing tank 2, the steel wire rope 9 and the grapple 10 are driven by the winding roller 8 to place the heat exchange element 2501 into the washing frame 13 above the rough washing tank 201, the inside of the rough washing tank 201 and the inside of the fine washing tank 202 are respectively provided with alkaline material-containing water and clean water, the alkaline material-containing water is conveyed to the inside of the first water pipe 17 by the first water pump 14, the heat exchange element 2501 is washed by the first spray head 18, the alkaline material can be sprayed on ammonium bisulfate at the blocking position, the ammonium bisulfate and the alkaline material react to generate ammonium bisulfate, the ammonium sulfate is not strong in adhesion, impurities are conveniently cleaned, the brush is utilized to brush, then the washing frame 13 is rotated to enable the heat exchange element 2501 to be rotated to the upper part of the fine washing tank 202, the clean water is pumped out by the second water pump 15, the second spray head 20 washes the heat exchange element 2501 with clean water, after the washing is completed, the cleaning frame 13 is rotated to enable the heat exchange element 2501 to be located above the water receiving tank 203, the fan 22 is used for pumping out hot air in the heating box 23, the air outlet spray head 21 is used for drying the heat exchange element 2501 with hot air, water on the heat exchange element 2501 can drop into the water receiving tank 203, after the heat exchange element 2501 is dried, the cleaning frame 13 is rotated to enable the heat exchange element 2501 to be located below the grapple 10, the motor 7 is used for driving the winding roller 8 to rotate, the grapple 10 is used for lifting the heat exchange element 2501, the annular shell 6 is rotated to enable the annular shell 6 to transport the heat exchange element 2501 to the upper portion of the air preheater 25, further, the motor 7 is used to drive the winding roller 8 to rotate, the heat exchange elements 2501 can be placed into the air preheater 25, the operation is repeated, the plurality of heat exchange elements 2501 can be comprehensively cleaned, when the heat exchange elements 2501 are extracted from the grapples 10, one heat exchange element 2501 can be extracted from the plurality of grapples 10, then each heat exchange element 2501 is cleaned, the operation is circulated, the working efficiency can be improved, in the cleaning process of the heat exchange elements 2501, the cleaning frame 13 is a grid and can be leaked, and therefore, when the cleaning is performed in a rough and fine mode, water sprayed by the first spray head 18 and the second spray head 20 is recycled, the waste of resources is avoided, and sewage after the use can be discharged from the sewage discharging valve.
In summary, the offline cleaning device for the air preheater drives the winding roller 8 to rotate through the motor 7, so that the heat exchange element 2501 can be lifted, the annular shell 6 is transported to the upper side of the cleaning pool 2, alkaline material-containing water is sprayed onto the heat exchange element through the first spray head 18, the heat exchange element 2501 is brushed through the brush, the heat exchange element 2501 is washed by clean water through the second spray head 20, and then the heat exchange element 2501 is dried through hot air through the fan 22 after being washed, so that ammonium bisulfate scale on the heat exchange element 2501 can be cleaned, the cleaning speed is improved, the cleaning quality is ensured, and the device disclosed by the invention has the advantages of good cleaning effect, convenience in use and suitability for popularization and use.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides an air preheater off-line belt cleaning device, includes bottom plate (1) and washs pond (2), its characterized in that: the device is characterized in that a fixed column (3) is fixedly connected to the top of the bottom plate (1), a fixed block (4) is movably connected to the top of the fixed column (3) through a bearing, a supporting rod (5) is fixedly connected to the surface of the fixed block (4), an annular shell (6) is fixedly connected to the end part of the supporting rod (5), a motor (7) is fixedly connected to the bottom of the annular shell (6), a winding roller (8) is fixedly connected to a power output shaft of the motor (7), a steel wire rope (9) is wound on the surface of the winding roller (8), and a grapple (10) is fixedly connected to the bottom of the steel wire rope (9); the inside fixedly connected with first baffle (11) of washing pond (2), the middle part fixedly connected with dead lever (12) of washing pond (2), the top of dead lever (12) is through bearing swing joint has washing frame (13), one side fixedly connected with first water pump (14) of washing pond (2) inside, the opposite side fixedly connected with second water pump (15) of washing pond (2) inside, the back fixedly connected with air-out pipe (16) of washing pond (2), the top fixedly connected with first water pipe (17) of first water pump (14), the one end fixedly connected with first shower nozzle (18) of first water pipe (17) keep away from first water pump (14), the top fixedly connected with second water pipe (19) of second water pump (15), the one end fixedly connected with second shower nozzle (20) of second water pump (15) keep away from, the top fixedly connected with air-out shower nozzle (21) of air-out pipe (16), the bottom of air-out pipe (16) is through fixedly connected with fan (22) of connecting pipe, the one side fixedly connected with fan (23) of fan (24) through heating box (23); the number of the first partition boards (11) is three, the three first partition boards (11) are arranged in the cleaning pool (2) in an annular array, the three first partition boards (11) divide the cleaning pool (2) into three areas, the three areas are respectively a rough cleaning pool (201), a fine cleaning pool (202) and a water receiving pool (203), the first water pump (14) is positioned in the rough cleaning pool (201), the second water pump (15) is positioned in the fine cleaning pool (202), the air outlet pipe (16) is positioned at the outer side of the water receiving pool (203), and drain valves are fixedly connected to the bottom ends of the outer side walls of the rough cleaning pool (201), the fine cleaning pool (202) and the water receiving pool (203) respectively; the bottom of the cleaning frame (13) is in a grid shape, and three second partition plates (1301) are uniformly and fixedly connected in the cleaning frame (13).
2. The air preheater off-line cleaning device according to claim 1, wherein: the number of the supporting rods (5) and the number of the motors (7) are multiple, and the motors (7) are arranged at the bottom of the annular shell (6) in an annular array.
3. The air preheater off-line cleaning device according to claim 1, wherein: the first water pipe (17) and the second water pipe (19) are fixedly connected with the inner wall of the cleaning tank (2), and one ends of the first water pipe (17) and the second water pipe (19) are provided with control valves.
4. The air preheater off-line cleaning device according to claim 1, wherein: an air inlet is fixedly connected to one side of the heating box (23), and a heating wire is wound on the surface of the heating pipe (24).
5. A method of operating an off-line cleaning apparatus for air preheater as set forth in any one of claims 1-4, wherein: the process is as follows: stopping the operation of the air preheater (25), uniformly arranging a plurality of heat exchange elements (2501) in the air preheater (25), after gaps among the plurality of heat exchange elements (2501) are in operation for a period of time in the air preheater (25), after the pressure difference of the air preheater (25) reaches a certain set value, slowly blocking ammonium bisulfate scale in the gaps among the plurality of heat exchange elements (2501), taking the heat exchange elements (2501) out of the air preheater, cleaning the air preheater, driving a winding roller (8) to rotate through a motor (7), enabling the winding roller (8) to drive a grapple (10) at the bottom end of a steel wire rope (9) to move up and down, enabling the grapple (10) to hook the heat exchange elements (2501) in the air preheater (25), driving the winding roller (8) to rotate through the motor (7), enabling a steel wire rope (9) to lift the heat exchange elements (2501), rotating a ring-shaped shell (6) to enable the heat exchange elements (1) to be transported to the upper part of a rough cleaning tank (201) of a cleaning tank (2), driving the grapple (201) and the rough cleaning tank (201) to be placed in the rough cleaning tank (13) through the winding roller (8) and the steel wire rope (9) to be in the rough cleaning tank (201), respectively, the first water pump (14) is used for conveying water containing alkaline materials to the inside of the first water pipe (17), the first spray head (18) is used for flushing the heat exchange element (2501), the alkaline materials can be sprayed on ammonium bisulfate scale at the blocking position, the ammonium bisulfate scale reacts with the alkaline materials to generate ammonium sulfate scale, the adhesion force of the ammonium sulfate scale is not strong, thereby impurities are convenient to clean, a brush is used for brushing, then the cleaning frame (13) is rotated, the heat exchange element (2501) is rotated to the upper part of the fine cleaning pool (202), the second water pump (15) is used for pumping clear water out, the second spray head (20) is used for flushing the heat exchange element (2501) with clear water, after flushing is completed, the cleaning frame (13) is rotated, the heat exchange element (2501) is positioned above the water receiving pool (203), the fan (22) is used for pumping out the interior of the heating box (23), the hot air spray head (21) is used for blowing the hot air to dry the heat exchange element (2501), the water on the heat exchange element (1) is dripped into the water receiving pool (203), the heat exchange element (2501) is rotated to be positioned under the rotary hook (10) to be wound by the rotary hook (2501), the rotary hook (2507) is further used for cleaning the heat exchange element (2501) by the rotary hook (10) to be wound by the rotary hook (10), the annular shell (6) conveys the heat exchange elements (2501) to the upper part of the air preheater (25), the motor (7) is used for driving the winding roller (8) to rotate, the heat exchange elements (2501) are placed into the air preheater (25), the operation is repeated, the heat exchange elements (2501) are comprehensively cleaned, when the hooks (10) extract the heat exchange elements (2501), one heat exchange element (2501) can be extracted from the hooks (10), then each heat exchange element (2501) is cleaned, the operation is circulated, the working efficiency can be improved, in the cleaning process of the heat exchange elements (2501), the cleaning frame (13) is a grid water-leaking structure, and when the heat exchange elements (2501) are subjected to rough and fine cleaning, the water sprayed by the first spray head (18) and the second spray head (20) is recycled, so that the waste of resources is avoided, and the used sewage is discharged through the drain valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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