CN112682814A - Blockage clearing device and method for multiple air preheater systems - Google Patents
Blockage clearing device and method for multiple air preheater systems Download PDFInfo
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- CN112682814A CN112682814A CN202011530880.5A CN202011530880A CN112682814A CN 112682814 A CN112682814 A CN 112682814A CN 202011530880 A CN202011530880 A CN 202011530880A CN 112682814 A CN112682814 A CN 112682814A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 83
- 238000004140 cleaning Methods 0.000 claims abstract description 77
- 239000007921 spray Substances 0.000 claims abstract description 37
- 238000003860 storage Methods 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 100
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 239000006004 Quartz sand Substances 0.000 claims description 20
- 239000004744 fabric Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 6
- 230000002441 reversible effect Effects 0.000 claims description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 239000004071 soot Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- 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
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Abstract
The invention discloses a blockage clearing device and a blockage clearing method of a multi-air preheater system, relates to the technical field of cleaning of air preheaters, and aims to solve the problem that heat exchange fins in the existing air preheaters are easy to adhere to and difficult to clear along with long-time use of soot impurities. The utility model discloses a heat exchange rotor, including heat exchange rotor, first stifled device, first lead screw, sand-containing spray head, first fixed case, sand storage barrel and air compressor, first stifled device is installed in the inside upper end rotation of first stifled device, the below fixed mounting of first sliding block has sand-containing shower nozzle, the inside of first fixed case is provided with respectively, the inside lower extreme of first stifled device is provided with the accumulator, stifled device is prevented to the opposite side of heat exchange rotor installation second, the second is prevented that the inside upper and lower end of stifled device all rotates and is installed the second lead screw, the one end fixed mounting of second sliding block has the rotation seat, the inside rotation of rotating the seat installs the cleaning head, the fixed second fixed case that is provided with in one side of stifled device is prevented to.
Description
Technical Field
The invention relates to the technical field of cleaning of air pre-heaters, in particular to a blockage removing device and a blockage removing method for a multi-air pre-heater system.
Background
The air preheater is a heating surface for preheating air before entering a boiler to a certain temperature by smoke in a flue at the tail part of the boiler through internal radiating fins, and is equipment for improving the heat exchange performance of the boiler and reducing energy consumption; on the other hand, the air preheater utilizes the waste heat of the flue gas, thereby further reducing the loss of smoke discharge and improving the thermal efficiency of the boiler.
However, a large amount of dust exists in flue gas generated by a boiler, the dust is doped with ammonium bisulfate generated in the combustion process and is easy to adhere to heat exchange plates, and blockage can be performed among the heat exchange plates along with the time, on one hand, condensed oil mist and unburnt combustible materials brought from a hearth are accumulated on the lower part of a middle layer of an air preheater and a cold end heat transfer element, which are sources of ignition, and on the other hand, the preheating recovery efficiency is greatly reduced, so that the existing requirements are not met, and the blockage removing device and the blockage removing method of the multi-air preheater system are provided.
Disclosure of Invention
The invention aims to provide a blockage removing device and a blockage removing method for a multi-air preheater system, which aim to solve the problem that heat exchange fins in an air preheater provided in the background art are easy to adhere and difficult to remove along with long-term use of soot impurities.
In order to achieve the above purpose, the invention provides a blockage removing device of a multi-air preheater system and a blockage removing method thereof, which comprises a heat exchange rotor, wherein a first blockage preventing device is installed at one side of the heat exchange rotor, a first lead screw is rotatably installed at the upper end inside the first blockage preventing device, a first sliding block is installed outside the first lead screw, a sand-containing spray head is fixedly installed below the first sliding block, a first fixed box is fixedly arranged at one side of the first blockage preventing device, a sand storage cylinder and an air compressor are respectively arranged inside the first fixed box, the air compressor is positioned below the sand storage cylinder, a recovery tank is arranged at the lower end inside the first blockage preventing device, a second blockage preventing device is installed at the other side of the heat exchange rotor, and a second lead screw is rotatably installed at the upper end and the lower end inside the second blockage preventing device, the externally mounted of second lead screw has the second sliding block, the one end fixed mounting of second sliding block has the rotation seat, the inside of rotating the seat is rotated and is installed the cleaning head, the fixed second fixing box that is provided with in one side of stifled device is prevented to the second.
Preferably, the sealed lid that is fixed with in the upper end of depositing a sand section of thick bamboo, the sealed discharging pipe that is fixed with of lower extreme of depositing a sand section of thick bamboo, the one end fixed mounting of discharging pipe has the sand valve, the intermediate position department fixed mounting of discharging pipe helps the blowing ware, the other end of discharging pipe is sealed to be fixed with defeated sand pipe, and defeated sand pipe is linked together with the discharging pipe, the other end and the sand-containing shower nozzle of defeated sand pipe are sealed fixed, high-pressurepipe is installed to air compressor's output, high-pressurepipe's one end is sealed to be fixed with the gas-supply pipe, the one end and the sand-containing shower nozzle.
Preferably, a first servo motor is installed to the one end of first lead screw, and first servo motor is fixed in the inside of first anti-blocking device, first servo motor's output shaft and first lead screw pass through the shaft coupling transmission and are connected, first sliding block and first lead screw looks adaptation.
Preferably, the screen cloth is installed to the inside upper end of accumulator, and one side of screen cloth extends to the inside of first stifled device of preventing, a plurality of springs that distribute in proper order are all installed to the upper and lower end that the screen cloth is located first stifled device inside, and the both ends of spring respectively with screen cloth and first stifled device fixed connection of preventing, the opposite side fixed mounting of screen cloth below has vibrating motor.
Preferably, an upper wind speed sensor is fixedly mounted on one side of the upper end of the first anti-blocking device, and a lower wind speed sensor is fixedly mounted on one side of the lower end of the first anti-blocking device.
Preferably, a second servo motor is installed on one side of the second lead screw, the second servo motor is located inside the second anti-blocking device, an output shaft of the second servo motor is in transmission connection with the second lead screw through a coupler, a third servo motor is fixedly installed on one side of the cleaning head, an output shaft of the third servo motor penetrates through the rotating seat and is fixedly connected with the cleaning head, a steel wire rod is installed at one end of the cleaning head in a rotating mode, a motor is installed inside the cleaning head, and an output end of the motor is fixedly connected with the steel wire rod.
Preferably, the fixed clean liquid case that is provided with in inside of the fixed case of second, the upper end fixed mounting of clean liquid case has the force (forcing) pump, the fixed water distributor that is provided with in inside of stifled device upper end is prevented to the second, sealed being fixed with the raceway between water distributor and the force (forcing) pump, the intermediate position department fixed mounting of raceway has automatically controlled valve, the inside upper end of stifled device is prevented to the second is provided with six clean liquid shower nozzles that distribute in proper order, and clean liquid shower nozzle and water distributor sealed fixed.
Preferably, the heat exchange rotor is fixedly provided with a plurality of heat exchange fins inside, and a rotating shaft is fixedly arranged in the middle of the heat exchange rotor.
The blockage clearing method of the blockage clearing device of the multiple air preheater systems comprises the following steps:
step one, under a normal operation state, a sand valve is in a closed state, an air compressor is started, the air compressor compresses air and transmits the air to a gas transmission pipe through a high-pressure gas pipe, the gas transmission pipe sprays the high-pressure air downwards through a sand-containing spray head, the high-pressure air is contacted with a heat exchange sheet in a heat exchange rotor and can quickly blow down dust on the surface, meanwhile, a first servo motor is started, the sand-containing spray head is driven to reciprocate below a first screw rod along with the forward and reverse rotation of the first servo motor, and the heat exchange sheet is cleaned;
secondly, when condensed ammonium bisulfate is adhered to the outside of the heat exchange plate, a fan-shaped area formed by the heat exchange plate is blocked, at the moment, the wind speed of an air inlet is smaller than that of an air outlet, the two wind speed sensors can detect air entering and air exiting, when the difference value of the two values exceeds the preset value, a sand valve at the lower end of a sand storage cylinder is opened through a controller, the air compressed by an air compressor is used as power for the quartz sand inside, the quartz sand is sucked into a sand-containing spray head and is ejected through a sand-containing spray nozzle through a discharge pipe and a sand conveying pipe through the negative pressure formed in the sand-containing spray head by the high-speed motion of air flow at the sand-containing spray head, at the moment, a certain amount of quartz sand is contained in the compressed air, the quartz sand has high impact speed and high density, and can rapidly wash the;
step three, when the heat exchange rotor is in a shutdown state, deep cleaning is periodically carried out, by starting a second servo motor, the second servo motor drives a second sliding block provided with a cleaning head to reciprocate on a second screw rod, when the cleaning head in a rotating seat is positioned between heat exchange sheets, a third servo motor is started, the cleaning head provided with a steel wire rod and the second sliding block are kept in a vertical state, and simultaneously, a motor is started, and the motor drives the steel wire rod to rotate at a high speed, when contacting the surface of the heat exchange plate, dirt on the heat exchange plate can be quickly cleaned under the action of high friction force, after the cleaning of one sector area is completed, the third servo motor is started again, the steel wire rod is recovered to the position where the second sliding block is parallel, and the process is repeated until the heat exchange rotor rotates to move the next fan-shaped area to the lower end of the steel wire rod, so that deep cleaning of the heat exchange fins is realized;
and step four, in the process of friction cleaning of the steel wire rod, opening a pressure pump and an electric control valve, conveying the cleaning liquid in the cleaning liquid tank to the water distribution pipe through a water pipe by the pressure pump, spraying the cleaning liquid to the surface of the heat exchange plate by a cleaning liquid spray head at the lower end of the water distribution pipe, and completing deep cleaning in a shutdown state by matching with the steel wire rod.
Compared with the prior art, the invention has the beneficial effects that:
1. in the normal operation state of the invention, the sand valve is in a closed state, the air compressor is started, the air compressor compresses air and transmits the air to the air transmission pipe through the high-pressure air pipe, the air transmission pipe sprays the high-pressure air downwards through the sand-containing spray head, when the high-pressure air contacts the heat exchange sheet in the heat exchange rotor, the dust on the surface can be blown down rapidly, simultaneously, a first servo motor is started, an output shaft of the first servo motor drives a first screw rod to rotate, a first sliding block provided with a sand-containing spray head is matched with the first screw rod, the rotary motion is converted into linear motion under the action of friction force, the sand-containing spray head is driven to reciprocate below the first screw rod along with the forward and reverse rotation of the first servo motor, the heat exchange fins are comprehensively cleaned, so that dust is prevented from being attached to the outside of the heat exchange fins, and efficient operation of the air preheater is guaranteed.
2. According to the invention, the upper air speed sensor and the lower air speed sensor are respectively arranged on one side of the upper end and the lower end of the first anti-blocking device, when condensed ammonium bisulfate is adhered to the outer part of the heat exchange sheet, the fan-shaped area formed by the heat exchange sheet is blocked, the air speed of the air inlet is smaller than that of the air outlet, the two air speed sensors can detect the air of the air inlet and the air of the air outlet, when the difference value of the two air speed sensors exceeds the preset value, the sand valve at the lower end of the sand storage cylinder is opened through the controller, the quartz sand in the sand storage cylinder is powered by the air compressed by the air compressor, the quartz sand is sucked into the sand-containing spray head through the discharge pipe and the sand conveying pipe and is sprayed out through the sand-containing spray nozzle by the high-speed movement of the air flow at the sand-containing spray head, at the moment, a certain amount of quartz sand is contained in the compressed air, the impact speed, therefore, the blocking area inside the preheating device is forcibly opened, the problem that condensed oil mist and unburnt combustible materials brought by the hearth are accumulated on the lower part of the middle layer of the air preheater and the cold end heat exchange fins to generate open fire is avoided, and the preheating recovery efficiency is kept at a stable level.
3. According to the invention, the recovery groove is arranged in the lower end of the first anti-blocking device, the quartz sand washes adhered objects and falls onto the screen mesh above the recovery groove, the vibration motor is started, so that the quartz sand wrapped with the adhered objects at the upper end is violently shaken, a part of the quartz sand is gradually separated, and falls into the recovery groove through the screen mesh, so that later-stage workers can collect and recycle the quartz sand, and the material cleaning cost is reduced.
4. The invention can regularly carry out deep cleaning when the heat exchange rotor is in a shutdown state by arranging the second anti-blocking device, the second servo motor is started, the output shaft of the second servo motor drives the second screw rod to rotate, the second sliding block provided with the cleaning head is driven to reciprocate on the second screw rod along with the forward and reverse rotation of the second servo motor under the action of friction force, the third servo motor is started when the cleaning head in the rotating seat is positioned between the heat exchange plates, the cleaning head provided with the steel wire rod and the second sliding block are kept in a vertical state, the motor is started simultaneously, the output shaft of the motor drives the steel wire rod to rotate at high speed, when the cleaning head is contacted with the surfaces of the heat exchange plates, dirt on the heat exchange plates can be rapidly cleaned under the action of high friction force, the heat exchange plates are ensured to be in a clean state, and after a sector area is cleaned, the third servo motor is started again, and (4) the steel wire rod is recovered to the position where the second sliding block is parallel, and the process is repeated until the heat exchange rotor rotates to move the next fan-shaped area to the lower end of the steel wire rod, so that the deep cleaning of the heat exchange fins is realized.
5. According to the invention, the six cleaning solution nozzles are sequentially arranged on one side of the upper end of the steel wire rod, in the process of friction cleaning of the steel wire rod, the pressure pump and the electric control valve are started, the cleaning solution in the cleaning solution tank is conveyed to the water distribution pipe by the pressure pump through the water conveying pipe, and then the cleaning solution is sprayed to the surface of the heat exchange plate by the cleaning solution nozzles at the lower end of the water distribution pipe, so that the overall cleaning speed is improved and the working efficiency is effectively improved under the premise of ensuring the cleaning effect by matching with the steel wire rod.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an overall top view of the present invention;
FIG. 3 is a schematic view of a cleaning head according to the present invention;
FIG. 4 is a partial enlarged view of area A of the present invention;
fig. 5 is a partially enlarged view of the region B of the present invention.
In the figure: 1. a heat exchange rotor; 2. a first anti-blocking device; 3. a second anti-blocking device; 4. a first stationary box; 5. a sand storage cylinder; 6. a sealing cover; 7. a discharge pipe; 8. a sand valve; 9. a blowing aid; 10. a sand conveying pipe; 11. an air compressor; 12. a high-pressure air pipe; 13. a gas delivery pipe; 14. a first lead screw; 15. a first servo motor; 16. an upwind speed sensor; 17. a lower wind speed sensor; 18. a recovery tank; 19. screening a screen; 20. a vibration motor; 21. a rotating shaft; 22. a second stationary box; 23. a cleaning liquid tank; 24. a pressure pump; 25. a water delivery pipe; 26. an electrically controlled valve; 27. a water distribution pipe; 28. a cleaning liquid spray head; 29. a second lead screw; 30. a second slider; 31. a rotating seat; 32. a cleaning head; 33. a second servo motor; 34. a third servo motor; 35. a steel wire rod; 36. a first slider; 37. a sand-containing nozzle; 38. a spring; 39. a motor; 40. a heat exchanger fin.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the invention provides a blockage removing device of a multi-air preheater system and a blockage removing method thereof, including a heat exchange rotor 1, a first blockage preventing device 2 is installed at one side of the heat exchange rotor 1, a first lead screw 14 is rotatably installed at the upper end inside the first blockage preventing device 2, a first sliding block 36 is installed outside the first lead screw 14, a sand-containing nozzle 37 is fixedly installed below the first sliding block 36, a first fixed box 4 is fixedly installed at one side of the first blockage preventing device 2, a sand storage cylinder 5 and an air compressor 11 are respectively installed inside the first fixed box 4, the air compressor 11 is located below the sand storage cylinder 5, a recovery tank 18 is installed at the lower end inside the first blockage preventing device 2, a second blockage preventing device 3 is installed at the other side of the heat exchange rotor 1, a second lead screw 29 is rotatably installed at the upper end and the lower end inside the second blockage preventing device 3, a second sliding block 30 is arranged outside the second lead screw 29, one end of the second sliding block 30 is fixedly provided with a rotating seat 31, a cleaning head 32 is rotatably arranged inside the rotating seat 31, and a second fixing box 22 is fixedly arranged on one side of the second anti-blocking device 3.
Further, a sealing cover 6 is fixed at the upper end of the sand storage barrel 5 in a sealing mode, a discharge pipe 7 is fixed at the lower end of the sand storage barrel 5 in a sealing mode, a sand valve 8 is fixedly installed at one end of the discharge pipe 7, an auxiliary blowing device 9 is fixedly installed at the middle position of the discharge pipe 7, a sand conveying pipe 10 is fixed at the other end of the discharge pipe 7 in a sealing mode, the sand conveying pipe 10 is communicated with the discharge pipe 7, the other end of the sand conveying pipe 10 is fixedly connected with a sand-containing spray head 37 in a sealing mode, a high-pressure air pipe 12 is installed at the output end of the air compressor 11, a gas conveying pipe 13 is fixed at one end of the high-pressure air pipe 12 in a sealing mode, one end of the gas conveying pipe 13 is fixedly connected with the sand-containing spray head 37 in a sealing mode, the problem that condensed oil mist and unburned combustible matter brought by a hearth are accumulated on the lower portion.
Further, first servo motor 15 is installed to first lead screw 14's one end, and first servo motor 15 is fixed in the inside of first anti-blocking device 2, first servo motor 15's output shaft and first lead screw 14 pass through the shaft coupling transmission and are connected, first sliding block 36 and first lead screw 14 looks adaptation, turn round motion into linear motion under the effect of frictional force, along with first servo motor 15 forward and reverse rotation, drive sand-containing shower nozzle 37 and carry out reciprocating motion in first lead screw 14's below, carry out comprehensive clearance to heat transfer piece 40.
Further, screen cloth 19 is installed to the inside upper end of accumulator 18, and one side of screen cloth 19 extends to the inside of first stifled device 2, screen cloth 19 is located the inside upper and lower ends of first stifled device 2 and all installs a plurality of springs 38 that distribute in proper order, and the both ends of spring 38 respectively with screen cloth 19 with first stifled device 2 fixed connection of preventing, the opposite side fixed mounting of screen cloth 19 below has vibrating motor 20, make the quartz sand of the parcel adhesion thing of screen cloth 19 upper end take place acutely to shake, make its part take place to break away from gradually, fall into accumulator 18 through screen cloth 19, and then be convenient for later stage staff to collect and recycle, the clearance material cost that reduces.
Further, one side fixed mounting that first prevents stifled device 2 upper end has last air velocity transducer 16, and one side fixed mounting that first prevents stifled device 2 lower extreme has down air velocity transducer 17, and two air velocity transducers can detect the air of air inlet and air-out.
Further, a second servo motor 33 is installed on one side of the second lead screw 29, the second servo motor 33 is located inside the second anti-blocking device 3, an output shaft of the second servo motor 33 is in transmission connection with the second lead screw 29 through a coupler, a third servo motor 34 is fixedly installed on one side of the cleaning head 32, an output shaft of the third servo motor 34 penetrates through the rotating base 31 to be fixedly connected with the cleaning head 32, a steel wire rod 35 is rotatably installed at one end of the cleaning head 32, a motor 39 is installed inside the cleaning head 32, an output end of the motor 39 is fixedly connected with the steel wire rod 35, the output shaft of the motor 39 drives the steel wire rod 35 to rotate at a high speed, when the output shaft contacts with the surface of the heat exchange plate 40, dirt on the heat exchange plate 40 can be rapidly cleaned under the action of high friction force, and the heat exchange plate 40 is ensured to be.
Further, the fixed clean liquid case 23 that is provided with in inside of second fixed case 22, the upper end fixed mounting of clean liquid case 23 has force (forcing) pump 24, the fixed water distributor 27 that is provided with in inside of second anti-blocking device 3 upper end, sealed being fixed with raceway 25 between water distributor 27 and the force (forcing) pump 24, the intermediate position department fixed mounting of raceway 25 has automatically controlled valve 26, the inside upper end of second anti-blocking device 3 is provided with six cleaning solution shower nozzles 28 that distribute in proper order, and cleaning solution shower nozzle 28 and water distributor 27 are sealed fixed, cleaning solution shower nozzle 28 of water distributor 27 lower extreme sprays the cleaning solution to the surface of heat exchanger fin 40, cooperation steel wire rod 35, under the prerequisite of guaranteeing the clearance effect, holistic clearance speed has been improved, work efficiency obtains effectively improving.
Further, a plurality of heat exchange fins 40 are fixedly arranged inside the heat exchange rotor 1, and the rotating shaft 21 is fixedly arranged in the middle of the heat exchange rotor 1.
The blockage clearing method of the blockage clearing device of the multiple air preheater systems comprises the following steps:
step one, under a normal operation state, the sand valve 8 is in a closed state, the air compressor 11 is started, the air compressor 11 compresses air and transmits the air to the air transmission pipe 13 through the high-pressure air pipe 12, the air transmission pipe 13 sprays the high-pressure air downwards through the sand-containing spray nozzle 37, the high-pressure air is contacted with the heat exchange sheet 40 in the heat exchange rotor 1 and can blow down dust on the surface rapidly, meanwhile, the first servo motor 15 is started, and the sand-containing spray nozzle 37 is driven to reciprocate below the first screw rod 14 along with the forward and reverse rotation of the first servo motor 15, so that the heat exchange sheet 40 is cleaned;
secondly, when condensed ammonium bisulfate is adhered to the outside of the heat exchange sheet 40, a fan-shaped area formed by the heat exchange sheet 40 is blocked, at the moment, the air speed of an air inlet is smaller than that of an air outlet, two air speed sensors can detect air of inlet air and outlet air, when the difference value of the air speed and the air outlet exceeds the preset value, a sand valve 8 at the lower end of a sand storage cylinder 5 is opened through a controller, the air compressed by an air compressor 11 is used as power for the quartz sand inside, the quartz sand is sucked into a sand-containing spray head 37 and is ejected through a sand-containing spray nozzle through a discharge pipe 7 and a sand conveying pipe 10 through negative pressure formed in the sand-containing spray head 37 through high-speed movement of air flow at the sand-containing spray head 37, at the moment, a certain amount of quartz sand is contained in the compressed air, the quartz sand has high impact speed and is dense, and the ammonium;
step three, when the heat exchange rotor 1 is in a shutdown state, deep cleaning is periodically carried out, by starting the second servo motor 33, the second servo motor 33 drives the second sliding block 30 provided with the cleaning head 32 to reciprocate on the second screw rod 29, when the cleaning head 32 in the rotating seat 31 is positioned between the heat exchange sheets 40, the third servo motor 34 is started, the cleaning head 32 provided with the steel wire rod 35 and the second sliding block 30 are kept in a vertical state, simultaneously, the motor 39 is started, the motor 39 drives the steel wire rod 35 to rotate at high speed, when the cleaning head contacts the surface of the heat exchange sheets 40, dirt on the heat exchange sheets 40 can be rapidly cleaned under the action of high friction force, after cleaning of one sector area is finished, the third servo motor 34 is started again, the steel wire rod 35 is recovered to the position where the second sliding block 30 is parallel, until the heat exchange rotor 1 rotates to move the next sector area to the lower end of the steel wire rod 35, the above processes are repeated to realize the deep cleaning of the heat exchange fins 40;
and step four, in the process of friction cleaning of the steel wire rod 35, the booster pump 24 and the electric control valve 26 are started, the cleaning liquid in the cleaning liquid tank 23 is conveyed to the water distribution pipe 27 through the water conveying pipe 25 by the booster pump 24, and then is sprayed to the surface of the heat exchange plate 40 by the cleaning liquid spray nozzle 28 at the lower end of the water distribution pipe 27, and deep cleaning in a shutdown state is completed by matching with the steel wire rod 35.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides a clear stifled device of many air preheater systems, includes heat exchange rotor (1), its characterized in that: a first anti-blocking device (2) is installed on one side of the heat exchange rotor (1), a first lead screw (14) is installed at the upper end of the interior of the first anti-blocking device (2) in a rotating mode, a first sliding block (36) is installed on the exterior of the first lead screw (14), a sand-containing spray head (37) is fixedly installed below the first sliding block (36), a first fixing box (4) is fixedly arranged on one side of the first anti-blocking device (2), a sand storage cylinder (5) and an air compressor (11) are respectively arranged inside the first fixing box (4), the air compressor (11) is located below the sand storage cylinder (5), a recovery groove (18) is formed in the lower end of the interior of the first anti-blocking device (2), a second anti-blocking device (3) is installed on the other side of the heat exchange rotor (1), and a second lead screw (29) is installed at the upper end and the lower end of the interior of the second anti-blocking device (3) in a rotating mode, the externally mounted of second lead screw (29) has second sliding block (30), the one end fixed mounting of second sliding block (30) has rotation seat (31), the inside rotation of rotating seat (31) installs cleaning head (32), fixed second fixed case (22) that is provided with in one side of second anti-blocking device (3).
2. The blockage removing device for the multiple air preheater system according to claim 1, wherein: deposit the sealed lid (6) that is fixed with in the upper end of a sand section of thick bamboo (5), the sealed discharging pipe (7) that is fixed with of lower extreme of a sand section of thick bamboo (5) of depositing, the one end fixed mounting of discharging pipe (7) has sand valve (8), the intermediate position department fixed mounting of discharging pipe (7) helps blows ware (9), the other end of discharging pipe (7) is sealed to be fixed with defeated sand pipe (10), and defeated sand pipe (10) is linked together with discharging pipe (7), the other end and the sand-containing shower nozzle (37) of defeated sand pipe (10) are sealed fixed, high-pressurepipe (12) are installed to the output of air compressor (11), the one end of high-pressurepipe (12) is sealed to be fixed with gas-supply pipe (13), the one end and the sand-containing shower nozzle (37) of gas-supply pipe.
3. The blockage removing device for the multiple air preheater system according to claim 1, wherein: first servo motor (15) are installed to the one end of first lead screw (14), and first servo motor (15) are fixed in the inside of first stifled device (2), the output shaft and the first lead screw (14) of first servo motor (15) are connected through the shaft coupling transmission, first sliding block (36) and first lead screw (14) looks adaptation.
4. The blockage removing device for the multiple air preheater system according to claim 1, wherein: screen cloth (19) are installed to the inside upper end of accumulator (18), and one side of screen cloth (19) extends to the inside of first stifled device (2) of preventing, screen cloth (19) are located the first upper and lower end of preventing stifled device (2) inside and all install a plurality of springs (38) that distribute in proper order, and the both ends of spring (38) respectively with screen cloth (19) and first prevent stifled device (2) fixed connection, the opposite side fixed mounting of screen cloth (19) below has vibrating motor (20).
5. The blockage removing device for the multiple air preheater system according to claim 1, wherein: an upper wind speed sensor (16) is fixedly mounted on one side of the upper end of the first anti-blocking device (2), and a lower wind speed sensor (17) is fixedly mounted on one side of the lower end of the first anti-blocking device (2).
6. The blockage removing device for the multiple air preheater system according to claim 1, wherein: second servo motor (33) is installed to one side of second lead screw (29), and second servo motor (33) are located the inside of second anti-blocking device (3), the output shaft of second servo motor (33) passes through shaft coupling transmission with second lead screw (29) and is connected, one side fixed mounting of cleaning head (32) has third servo motor (34), and the output shaft of third servo motor (34) passes and rotates seat (31) and cleaning head (32) fixed connection, the one end rotation of cleaning head (32) is installed wire rod (35), the internally mounted of cleaning head (32) has motor (39), the output and the wire rod (35) fixed connection of motor (39).
7. The blockage removing device for the multiple air preheater system according to claim 1, wherein: the fixed clean liquid case (23) that is provided with in inside of case (22) is fixed to the second, the upper end fixed mounting of clean liquid case (23) has force (forcing) pump (24), the inside of second anti-blocking device (3) upper end is fixed and is provided with water distributor (27), it is sealed between water distributor (27) and force (forcing) pump (24) to be fixed with raceway (25), the intermediate position department fixed mounting of raceway (25) has automatically controlled valve (26), the inside upper end of second anti-blocking device (3) is provided with six clean fluid shower nozzles (28) that distribute in proper order, and clean fluid shower nozzle (28) and water distributor (27) sealed fixed.
8. The blockage removing device for the multiple air preheater system according to claim 1, wherein: the heat exchange rotor is characterized in that heat exchange fins (40) are fixedly arranged inside the heat exchange rotor (1), a plurality of heat exchange fins (40) are arranged, and a rotating shaft (21) is fixedly arranged at the middle position of the heat exchange rotor (1).
9. The blockage removing method of the blockage removing device based on the multiple air preheater systems of any one of claims 1 to 8 is characterized in that: the method comprises the following steps:
step one, under a normal operation state, a sand valve (8) is in a closed state, an air compressor (11) is started, the air compressor (11) compresses air and conveys the air to an air conveying pipe (13) through a high-pressure air pipe (12), the air conveying pipe (13) sprays the high-pressure air downwards through a sand-containing spray head (37), the high-pressure air is contacted with a heat exchange plate (40) in a heat exchange rotor (1) and can blow down dust on the surface rapidly, a first servo motor (15) is started simultaneously, and the sand-containing spray head (37) is driven to reciprocate below a first lead screw (14) along with the forward and reverse rotation of the first servo motor (15) to clean the heat exchange plate (40);
secondly, when the condensed ammonium bisulfate is adhered to the outer part of the heat exchange fins (40), a fan-shaped area formed by the heat exchange fins (40) is blocked, at the moment, the wind speed of the air inlet is less than that of the air outlet, the two wind speed sensors can detect the air which enters and exits, when the difference value of the two exceeds the preset value, the sand valve (8) at the lower end of the sand storage cylinder (5) is opened through the controller, the quartz sand in the sand storage cylinder takes the air compressed by the air compressor (11) as power, through the negative pressure formed in the sand-containing spray head (37) by the high-speed movement of the air flow at the sand-containing spray head (37), quartz sand is sucked into the sand-containing spray head (37) through the discharge pipe (7) and the sand conveying pipe (10) and is ejected out through a sand-containing nozzle, at the moment, compressed air contains a certain amount of quartz sand, the impact speed of the quartz sand is high and dense, and the ammonium bisulfate adhered to the surface of the heat exchange plate (40) can be quickly washed away;
thirdly, when the heat exchange rotor (1) is in a shutdown state, deep cleaning is periodically carried out, the second servo motor (33) is started, the second servo motor (33) drives the second sliding block (30) provided with the cleaning head (32) to reciprocate on the second lead screw (29), when the cleaning head (32) in the rotating seat (31) is positioned between the heat exchange plates (40), the third servo motor (34) is started, the cleaning head (32) provided with the steel wire rod (35) and the second sliding block (30) are kept in a vertical state, meanwhile, the motor (39) is started, the motor (39) drives the steel wire rod (35) to rotate at a high speed, when the cleaning head is in contact with the surfaces of the heat exchange plates (40), dirt on the heat exchange plates (40) can be rapidly cleaned under the action of high friction force, after a sector area is cleaned, the third servo motor (34) is started again, and the steel wire rod (35) is recovered to the position where the second sliding block (30) is parallel, when the heat exchange rotor (1) rotates to move the next sector area to the lower end of the steel wire rod (35), the process is repeated, and deep cleaning of the heat exchange fins (40) is realized;
and step four, in the process of friction cleaning of the steel wire rod (35), a booster pump (24) and an electric control valve (26) are started, the cleaning liquid in the cleaning liquid tank (23) is conveyed to the water distribution pipe (27) through a water conveying pipe (25) by the booster pump (24), then the cleaning liquid is sprayed to the surface of the heat exchange plate (40) by a cleaning liquid spray head (28) at the lower end of the water distribution pipe (27), and deep cleaning under the shutdown state is completed by matching with the steel wire rod (35).
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| CN202011530880.5A CN112682814A (en) | 2020-12-22 | 2020-12-22 | Blockage clearing device and method for multiple air preheater systems |
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| CN202011530880.5A CN112682814A (en) | 2020-12-22 | 2020-12-22 | Blockage clearing device and method for multiple air preheater systems |
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| CN114367247A (en) * | 2021-12-10 | 2022-04-19 | 中氢新能(北京)新能源技术研究院有限公司 | Spacer and shell and tube reaction unit |
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