CN113464189B - Automatic adjustable mine heat transfer device that airs exhaust that evenly distributes - Google Patents
Automatic adjustable mine heat transfer device that airs exhaust that evenly distributes Download PDFInfo
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- CN113464189B CN113464189B CN202110791297.8A CN202110791297A CN113464189B CN 113464189 B CN113464189 B CN 113464189B CN 202110791297 A CN202110791297 A CN 202110791297A CN 113464189 B CN113464189 B CN 113464189B
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- air
- mine
- exhaust
- heat exchanger
- fresh air
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- 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
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- 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
- F28G15/003—Control arrangements
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- 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
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
Abstract
The invention discloses an automatic adjustable and uniform air distribution mine air exhaust heat exchange device which comprises a wellhead room, a mine air exhaust fan and a mine air exhaust heat exchange device, wherein a wellhead room fresh air static pressure box is arranged outside the wellhead room, a wellhead room fresh air louver air supply opening is embedded in a part of a wall body of the wellhead room, which is attached to the wellhead room fresh air static pressure box, a fresh air supply pipe is arranged on the other side of the wellhead room fresh air static pressure box, the other end of the fresh air supply pipe is connected with the mine air exhaust heat exchange device, a large-runner air-air heat exchanger is arranged inside the mine air exhaust heat exchange device, and a mine air exhaust air static pressure box pressure regulating plate and an adjustable regulating plate controlled by an automatically telescopic regulating rod are arranged in an air heat exchange tower. According to the invention, the air flow in the heat exchanger is uniformly distributed by the arranged adjustable adjusting plate, the adjusting plate of the air inlet static pressure box and the symmetrically arranged fresh air double fans, so that the interior is not frozen under extreme weather conditions, and dust is effectively prevented from gathering and scaling on the wall surface of the heat exchanger.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air.
Background
With the rapid development of social economy, the mining of domestic coal is mainly distributed in the northwest severe cold areas of China, the coal mine air inlet shaft is used as an important facility for safe production, in order to ensure that the wall of the air inlet shaft is not frozen in winter and harm the safety of equipment and personnel in the air inlet shaft, the national standard specifies that the air inlet temperature of a mine in winter is not lower than 2 ℃, the air inlet temperature of the cold area and the severe cold area is below 0 ℃ for a long time, the air inlet of the air inlet shaft needs to be heated, meanwhile, the traditional coal-fired boiler cannot meet the requirements of energy conservation and emission reduction, the coal existence conditions in the northwest make the air inlet shaft often only used for ventilation, and the air inlet shaft is arranged in a near range, so that the air heat exchange technology for directly heating fresh air in the air exhausted by the mine is widely applied to the mouth of the air inlet shaft of the western coal mine for freeze prevention.
However, the existing heat exchanger has low heat exchange efficiency due to uneven distribution of air flow, is easy to freeze in extreme weather, and dust in mine exhaust air is accumulated on the wall surface of the heat exchanger to form scales; therefore, the existing requirements are not met, and the mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air is provided.
Disclosure of Invention
The invention aims to provide a mine exhaust air heat exchange device capable of automatically adjusting and uniformly distributing air, and aims to solve the problems that the prior heat exchanger in the background art has low heat exchange efficiency due to uneven distribution of air flow, is easy to frost and freeze in extreme weather, and dust in mine exhaust air is gathered and scales on the wall surface of the heat exchanger.
In order to achieve the purpose, the invention provides the following technical scheme: a mine air exhaust heat exchange device capable of automatically and uniformly distributing air comprises a wellhead room, an air pipe and a mine air exhaust heat exchange device, wherein a wellhead room fresh air static pressure box is arranged outside the wellhead room, a wellhead room fresh air louver air supply opening is embedded in a part of a wall body of the wellhead room, which is attached to the wellhead room fresh air static pressure box, a wellhead air heater is arranged below the wellhead room fresh air louver air supply opening, a fresh air supply pipe is arranged on the other side of the wellhead room fresh air static pressure box, a fresh air supply pipe air pressure and air volume transmitter are arranged on the fresh air supply pipe, a fresh air outlet reducing device is arranged at the other end of the fresh air supply pipe, a fresh air heat exchange air supply static pressure box is arranged at the other end of the fresh air outlet reducing device, a fresh air supply temperature and humidity transmitter is arranged in the fresh air heat exchange air supply static pressure box, the fresh air heat exchange air supply static pressure box is connected with a fresh air outlet end of a large-flow-channel air heat exchanger, the other end of the large-flow-channel wind-wind heat exchanger is connected with a fresh air heat exchange air inlet static pressure box, the middle of the fresh air heat exchange air inlet static pressure box is provided with an extreme low-temperature weather fresh air electric heater, the large-flow-channel wind-wind heat exchanger is provided with a first-layer heat exchange pipe outer wall temperature sensor and a second-layer heat exchange pipe outer wall temperature sensor, the middle position of the large-runner wind-wind heat exchanger is provided with an overhaul channel, the connecting end of the large-runner wind-wind heat exchanger and the fresh air heat exchange air inlet static pressure box at one layer is provided with a fresh air inlet electric adjusting air valve of the heat exchanger at one layer, the connecting end of the large-runner wind-wind heat exchanger and the fresh air heat exchange air inlet static pressure box at the second layer is provided with a fresh air inlet electric adjusting air valve of the heat exchanger at the second layer, the fresh air heat exchange air inlet static pressure box is characterized in that two fresh air inlet gradually-expanding devices are arranged on the outer side of the fresh air heat exchange air inlet static pressure box and are respectively connected with two fresh air fans through fresh air fan outlet section air pipes.
The mine air exhaust heat exchange device is characterized in that one end inside the mine air exhaust heat exchange device is provided with a mine air exhaust fan air outlet coupling box, the air inlet end of the mine air exhaust fan air outlet coupling box is provided with two mine air exhaust switching devices in non-heating seasons and is connected with a mine air exhaust main fan which is used and used in parallel, the air outlet end of the mine air exhaust fan air outlet coupling box is connected with a mine air exhaust air inlet static pressure box, a mine air exhaust air inlet static pressure box pressure adjusting plate is arranged in the mine air exhaust air inlet static pressure box, one side of the mine air exhaust air inlet static pressure box pressure adjusting plate is provided with a large-runner air-air heat exchanger which is arranged in two layers, the upper part of the large-runner air-air heat exchanger is a mine air exhaust uniform air inlet air distribution box, the lower part of the large-runner air-air heat exchanger is a mine air exhaust return air box, the top surface of the mine air exhaust uniform air inlet air distribution box is an adjustable adjusting plate, and one side of the adjustable adjusting plate is provided with an automatically adjustable telescopic rod, the adjustable adjusting plate is connected with a winding drum driving shaft and a winding drum driven shaft at two ends of a mine air exhaust uniform air inlet distribution box, one end of an automatically adjustable telescopic rod is provided with a hydraulic control device and an explosion-proof oil pressure pump, the bottom of the mine air exhaust uniform air inlet distribution box is provided with a high-pressure flushing decontamination distribution pipe in a heat exchange pipe, the end part of the high-pressure flushing decontamination distribution pipe in the heat exchange pipe is provided with a high-pressure flushing nozzle, the lower part of the high-pressure flushing decontamination distribution pipe in the heat exchange pipe is provided with a flushing decontamination high-pressure hose guide rail which is arranged on the inner side wall of the mine air exhaust uniform air inlet distribution box above the large-runner air-air heat exchanger, the lower part of the mine air exhaust return box at the lower part of the two-layer large-runner air-air heat exchanger is provided with a heat exchanger condensate water drainage vertical pipe at the lower end of the heat exchanger condensate water drainage vertical pipe, the bottom end of the condensed water drainage vertical pipe of the heat exchanger is connected with a mine air exhaust condensed water pipe, the mine air exhaust condensed water pipe is buried under a frozen soil layer and is connected with a mine air exhaust condensed water collecting pit, the bottom of the mine air exhaust condensate water collecting pit is provided with a heat tracing type condensate water discharge pipe, the mine air exhaust return air box above the side of the mine air exhaust condensate water collecting pit is provided with a heat exchanger mine air exhaust outlet, the mine air exhaust outlet of the heat exchanger is connected with the mine air exhaust static pressure box of the heat exchanger, the inner side surface of the bottom of the mine air exhaust static pressure box of the heat exchanger is provided with a mine air exhaust waste heat recovery meter cooler, the mine exhaust waste heat recovery surface air cooler is provided with an ethylene glycol solution circulating pipeline, the other side of the ethylene glycol solution circulating pipeline is provided with a water source heat pump, the other end of the water source heat pump is provided with a heat pump circulating hot water pipeline, and a heat-preservation hot water tank for flushing and cleaning sewage and a wellhead air heater are respectively arranged in the heat pump circulating hot water pipeline; the inside of the heat-preservation hot water tank for flushing and cleaning is provided with a high-pressure water pump, the end part of the high-pressure water pump is connected with a high-pressure flushing main pipe, the outflow end of the high-pressure flushing main pipe is respectively provided with a switching valve, the other end of the switching valve is provided with a high-pressure flushing main pipe, the high-pressure flushing main pipe and the other end of the switching valve are both connected with a high-pressure flushing and cleaning distribution pipe in a heat exchange pipe, and a high-pressure flushing sprayer is arranged in one side of the heat exchange pipe of the high-pressure flushing and cleaning distribution pipe.
Preferably: the mine air-exhaust condensation water recovery device is characterized in that one end of a washing water supplementing pipe is inserted below the bottom surface, the bottom end of the washing water supplementing pipe is connected with a clean water pump, a mine air-exhaust condensation water purification device is arranged on the outer side of the clean water pump, a mine air-exhaust condensation water heat tracing drainage pipe is arranged on the outer surface of one end of the mine air-exhaust condensation water purification device, and the upper end of the mine air-exhaust condensation water heat tracing drainage pipe is connected to the bottom surface of a mine air-exhaust condensation water sump.
Preferably, the following components: a fresh air inlet temperature and humidity transmitter is arranged inside the fresh air supply pipe, a fresh air supply pipe air pressure and air volume transmitter is arranged at the port of the fresh air supply pipe, a temperature and humidity transmitter of a mine air exhaust inlet of a heat exchanger is arranged in the mine air exhaust and inlet static pressure box, a temperature and humidity transmitter at the air exhaust outlet of the heat exchanger mine of the air exhaust air static pressure box of the heat exchanger mine, the temperature and humidity transmitter at the air exhaust inlet of the heat exchanger mine and the temperature and humidity transmitter at the air exhaust outlet of the heat exchanger mine are arranged at the middle part of the static pressure box, the fresh air pipe straight section at the rear end of the fresh air inlet gradual expansion pressure reduction device is provided with a fresh air inlet pipe wind pressure and wind volume transmitter, the rear port of the fresh air inlet gradual expansion device is provided with a fresh air supply temperature and humidity transmitter, and an extreme weather fresh air electric heater is arranged in a fresh air heat exchange inlet static pressure box at the outlet end of the fresh air inlet gradual expansion device.
Preferably: the water source heat pump is connected with a high-pressure water pump and a heat pump circulating hot water pipeline, a heat pump circulating hot water heater is arranged in a heat preservation hot water tank for flushing and cleaning at the other end of the heat pump circulating hot water pipeline, an auxiliary electric heating plate is arranged inside the heat pump circulating hot water heater, and a mine waste heat recovery meter cooler is arranged in an air exhaust static pressure tank of a heat exchanger mine.
Preferably: the exit ends of the two fresh air inlet gradually-expanding devices are arranged at the middle position of the fresh air heat exchange inlet static pressure box, the mine air exhaust inlet static pressure box is provided with a mine air exhaust inlet static pressure box pressure regulating plate, and an adjustable regulating plate connected by an automatically-adjustable telescopic rod is arranged in the mine air exhaust heat exchange uniform air distribution box.
Preferably: the mine air exhaust switching device and the fresh air supply pipe are completely attached to the outer wall of the device shell in the non-heating season, and are fixed to the device shell in the non-heating season through welding.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can uniformly distribute the air exhaust volume and the fresh air volume inside and outside the large-flow-channel air-air heat exchanger in the mine air exhaust fan device under low outside temperature or extreme weather, wherein the fresh air fan, the large-flow-channel air-air heat exchanger, the air exhaust coupling box of the mine air exhaust fan, the mine air exhaust and air intake static pressure box pressure regulating plate, the fresh air intake gradually-expanding device, the high-pressure flushing decontamination distributing pipe in the heat exchange pipe, the fresh air inlet electric regulating air valve of the two-layer heat exchanger, the fresh air inlet electric regulating air valve of the one-layer heat exchanger, the fresh air static pressure box of the wellhead house, the fresh air supply pipe, the wellhead air heater, the mine air exhaust switching device in non-heating seasons, the extreme low-temperature weather fresh air heater, the mine air exhaust waste heat recovery meter cooler, the water source heat pump, the ethylene glycol solution circulating pipeline, the mine air exhaust outlet of the two-layer heat exchanger, the mine air exhaust outlet of the one-layer heat exchanger, the heat pump circulating hot water pipeline, the high-pressure water pump and the fresh air volume, the wind flow in the heat exchanger can be ensured to be uniformly distributed; the temperature of fresh air entering an air inlet well of a wellhead room is quickly heated and regulated to be not lower than 2 ℃, and the inner and outer flow channels of the large-flow-channel air-air heat exchanger are prevented from being frozen and the air inlet temperature of the air inlet vertical well is not lower than 2 ℃ under extreme weather conditions.
2. The invention can clean the inner pipeline of the device through a clean water pump, a fresh air supply pipe wind pressure and wind volume transmitter, a mine exhaust condensed water heat tracing drainage pipe, a washing water replenishing pipe, a washing and dirt cleaning high-pressure hose automatic guide rail, a switching valve, a hydraulic control device, a condensed water drainage pipe and an explosion-proof type oil hydraulic pump when the device runs, thereby effectively avoiding dust around the mine and the mine tunnel from gathering and scaling inside and outside the wall of the heat exchanger and inside the device.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a cross-sectional view taken along the line A-A of the present invention;
FIG. 3 is a cross-sectional view taken along the line B-B of the present invention;
FIG. 4 is a schematic diagram of the structure of the high pressure water pump of the present invention;
FIG. 5 is a schematic structural diagram of the mine exhaust air condensation water purification device of the invention;
FIG. 6 is a schematic diagram of a control platform according to the present invention.
In the figure: 1. a large-flow-channel wind-wind heat exchanger; 2. an air outlet connecting box of a mine air exhaust fan; 3. an air exhaust and intake plenum box of a mine; 4. an air inlet of a mine of the air-air heat exchanger; 5. an adjustable adjusting plate; 6. a telescopic rod capable of being automatically adjusted; 7. a pressure regulating plate of a mine air exhaust and intake plenum box; 8. a fresh air inlet divergent device; 9. a fresh air heat exchange air distribution static pressure box; 10. a fresh air heat exchange return air static pressure box; 11. a reel drive shaft; 12. a fresh air fan; 13. a drum driven shaft; 14. a pressure transmitter at the mine air exhaust inlet of the heat exchanger; 15. a pressure transmitter at the mine air exhaust outlet of the heat exchanger; 16. the fresh air inlet of the two-layer heat exchanger is electrically adjusted with an air valve; 17. the fresh air inlet of the first layer of heat exchanger is electrically adjusted with an air valve; 18. air exhausting and heat exchanging uniform air distribution boxes of the mine; 19. a mine air exhaust heat exchange air return box; 20. the wind pressure and wind volume transmitter of the fresh air supply pipe; 21. a fresh air supply temperature and humidity transmitter; 22. a fresh air inlet pipe wind pressure and wind volume transmitter; 23. a fresh air inlet temperature and humidity transmitter; 24. fresh air static pressure box of wellhead room; 25. fresh air shutter air supply outlet of the wellhead house; 26. a fresh air blast pipe; 27. a wellhead air heater; 28. a mine air exhaust switching device in non-heating seasons; 29. a fresh air electric heater in extremely low temperature weather; 30. a mine exhaust waste heat recovery surface cooler; 31. a water source heat pump; 32. a glycol solution circulation line; 33. a mine air exhaust outlet of the heat exchanger; 34. a mine air exhaust static pressure box of a heat exchanger; 35. a heat pump hot water circulation pipeline; 36. a pit for collecting the mine exhaust condensed water; 37. a condensed water discharge pipe; 38. a hydraulic control device; 39. an explosion-proof type oil hydraulic pump; 40. flushing the main pipe at high pressure; 41. a heat preservation hot water tank for flushing and cleaning; 42. a heat pump circulating hot water heater; 43. a high pressure water pump; 44. switching valves; 45. washing and cleaning the automatic guide rail of the high-pressure hose; 46. a temperature sensor for the outer wall of the second layer of heat exchange tube; 47. a layer of heat exchange tube outer wall temperature sensor; 48. a washing water replenishing pipe; 49. mine air exhaust condensation water heat tracing drainage pipe; 50. a mine exhaust condensation water purification device; 51. a clean water pump; 52. a mine air exhaust heat exchange device; 53. A temperature and humidity transmitter at the mine air exhaust inlet of the heat exchanger; 54. a temperature and humidity transmitter at the mine air exhaust outlet of the heat exchanger; 55. flushing the main pipe at high pressure; 56. a high-pressure flushing decontamination distribution pipe is arranged in the heat exchange pipe; 57. a high pressure flush jet; 58, a heat exchanger condensed water drainage floor drain; 59, a condensed water discharge vertical pipe of the heat exchanger; 60. a fresh air outlet reducing device; 61. an outlet section air pipe of the fresh air fan; 62, repairing the channel; 63, a mine air exhaust main exhaust port; 64. a condensed water drainage tank; 65. a clean water tank; 66. and (5) controlling the platform.
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 to 6, an embodiment of the present invention includes: a mine air exhaust heat exchange device capable of automatically and uniformly distributing air is a fresh air-mine air exhaust cross-flow type heat exchanger, a building enclosure of the device and all pipelines are completely insulated, the fresh air side of a mine air exhaust heat exchange device 52 is provided with two fresh air fans 12 controlled in a frequency conversion mode, the two fresh air fans 12 are connected into a fresh air inlet gradual-expansion device 8 through fresh air fan outlet section air pipes 61, fresh air inlet pipe air pressure and air quantity transmitters 22 and fresh air inlet temperature and humidity transmitters 23 are arranged on straight pipe sections of the fresh air fan outlet section air pipes 61, the two fresh air inlet gradual-expansion devices 8 are arranged in parallel at the middle position of a fresh air heat exchange air distribution static pressure box 9, an extreme low temperature weather fresh air heater 29 is arranged in the fresh air heat exchange air distribution static pressure box 9, the rear portion of the extreme low temperature weather fresh air heater 29 is a large-runner air heat exchanger 1 divided into two layers, two layers of heat exchange pipe outer wall temperature sensors 47 and one layer of heat exchange pipe outer wall temperature sensors are arranged on the outer wall of the large-runner air heat exchanger 1 of one layer and two layers of the large-runner air exchanger 1 46, the inlet ends of the first-layer and second-layer large-runner wind-wind heat exchangers 1 are respectively provided with a second-layer heat exchanger fresh air inlet electric adjusting air valve 17 and a first-layer heat exchanger fresh air inlet electric adjusting air valve 16, the large-runner wind-wind heat exchanger 1 is arranged behind the second-layer heat exchanger fresh air inlet electric adjusting air valve 17 and the first-layer heat exchanger fresh air inlet electric adjusting air valve 16, the middle position of the large-runner wind-wind heat exchanger 1 is provided with an overhaul channel 62, the outlet end of the large-runner wind-wind heat exchanger 1 is provided with a fresh air heat exchange return static pressure box 10, the other side of the fresh air heat exchange return static pressure box 10 is connected with a fresh air reducing device 60, the fresh air reducing device 60 is connected with a fresh air supply pipe 26, the straight pipe section of the fresh air supply pipe 26 is provided with a fresh air supply pipe air pressure and air volume transmitter 20, the front end of the fresh air supply pipe 26 is provided with a fresh air supply temperature and humidity transmitter 21, and the tail end of the fresh air supply pipe 26 is connected with a fresh air static pressure box 24 in a wellhead room, the other side of the wellhead room fresh air static pressure box 24 is embedded into the inner side of the wellhead room outer wall and is provided with a wellhead room fresh air shutter air supply outlet 25, the inner side of the outer wall opposite to the wellhead room fresh air shutter air supply outlet 25 is provided with a wellhead air heater 27, the wellhead air heater 27 is connected with a water source heat pump 31 through a heat pump hot water circulation pipeline 35, the water source heat pump 31 is connected with a mine exhaust waste heat recovery surface cooler 30 through an ethylene glycol solution circulation pipeline 32 to form a closed loop, and the mine exhaust waste heat recovery surface cooler 30 is arranged in the outer side wall of a heat exchanger mine exhaust static pressure box 34;
mine exhaust air of the mine exhaust air heat exchange device 52 enters from a mine exhaust air switching device 28 in a non-heating season connected with an outlet of the mine exhaust air heat exchange device 52, a mine exhaust air fan air outlet connecting box 2 is arranged at the rear end of the mine exhaust air switching device 28 in the non-heating season, an air outlet end of the mine exhaust air fan air outlet connecting box 2 is connected with a mine exhaust air inlet static pressure box 3, a mine exhaust air inlet static pressure box pressure regulating plate 7 is arranged in the mine exhaust air inlet static pressure box 3, a large-runner air-air heat exchanger 1 arranged in two layers is arranged on the opposite side of the mine exhaust air inlet static pressure box pressure regulating plate 7, a mine exhaust air uniform air inlet air distribution box 53 is arranged at the top of the large-runner air-air heat exchanger 1, a mine exhaust air return box is arranged at the lower part of the large-runner air-air heat exchanger 1, an adjustable adjusting plate 5 is arranged on the top of the mine exhaust air distribution box 53, and an automatically adjustable telescopic rod 6 is arranged on the back side of the adjustable adjusting plate 5, the adjustable adjusting plate 5 is connected with a reel driving shaft 11 and a reel driven shaft 13 at two ends of a mine air exhaust uniform air inlet distribution box 53, one end of an automatically adjustable telescopic rod 6 is provided with a hydraulic control device 38 and an explosion-proof oil hydraulic pump 39, the bottom of the mine air exhaust uniform air inlet distribution box 18 is provided with a high-pressure flushing decontamination distribution pipe 56 in a heat exchange pipe, the end part of the high-pressure flushing decontamination distribution pipe 56 in the heat exchange pipe is provided with a high-pressure flushing nozzle 57, the lower part of the high-pressure flushing decontamination distribution pipe 56 in the heat exchange pipe is provided with a flushing decontamination high-pressure hose guide rail 45, the flushing decontamination high-pressure hose guide rail 45 is arranged at the inner side of the mine air exhaust uniform air inlet distribution box 18 above the large-runner air-air heat exchanger 1, the lower part of the second-layer mine air exhaust uniform air inlet distribution box 18 is provided with the large-runner air-air heat exchanger 1, and the outlet of the second-layer large-runner air-air heat exchanger 1 is provided with a second-layer mine air exhaust heat exchange return-return box 19, the outlet end of the second layer of mine air exhaust heat exchange air return box 19 is provided with a heat exchanger mine air exhaust outlet 33, the heat exchanger mine air exhaust outlet 33 is directly connected with a heat exchanger mine air exhaust static pressure box 34, the upper top end of the heat exchanger mine air exhaust static pressure box 34 is an open mine air exhaust main exhaust outlet 63, the lower part of the second layer of mine air exhaust heat exchange air return box 19 is a layer of mine air exhaust uniform air inlet air distribution box 18, the arrangement in the layer of mine air exhaust uniform air inlet air distribution box 18 is the same as that of the second layer, the bottom of the first layer of large-runner air-air heat exchanger 1 is provided with a mine air exhaust heat exchange air return box 19, a mine air exhaust condensate water sump 36 is arranged below the bottom of the layer of mine air exhaust heat exchange air return box 19, and the mine air exhaust condensate water sump 36 is arranged close to an enclosure structure outside the mine air exhaust heat exchange device 52;
furthermore, the lowest part of the bottom plate below the mine exhaust air return box 19 on each layer is provided with a heat exchanger condensed water drain floor drain 58, the lower end of the heat exchanger condensed water drain floor drain 58 is provided with a heat exchanger condensed water drain riser 59, the bottom end of the heat exchanger condensed water riser 59 is connected to the mine exhaust condensed water collecting pit 36 through a condensed water drain pipe 37, the bottommost part of the mine exhaust condensed water collecting pit 36 is provided with a mine exhaust condensed water heat tracing drain pipe 49, the mine exhaust condensed water heat tracing drain pipe 49 is buried below a frozen soil layer and is connected to the mine exhaust condensed water purifying device 50, the mine exhaust condensed water purifying device 50 is arranged in a condensed water pool 64, the mine exhaust condensed water purifying device 50 is connected to a clean water pool 65, the outlet of a clean water pump 51 in the clean water pool 65 is connected to a water replenishing pipe 48, the condensed water in the device can be purified, and the recycle of the water resource can be realized, energy conservation and environmental protection.
Further, a washing water replenishing pipe 48 penetrates through a frozen soil layer and is connected into a washing and decontamination heat preservation hot water tank 41, a high-pressure water pump 43 and a heat pump circulating hot water heater 42 are arranged inside the washing and decontamination heat preservation hot water tank 41, the heat pump circulating hot water heater 42 is connected with a water source heat pump 31 through a main line of a heat pump circulating hot water pipeline 35, a branch of the heat pump circulating hot water pipeline 35 is connected with a wellhead air heater 27, the other end of the water source heat pump 31 is connected with an ethylene glycol solution circulating pipeline 32, one end of the ethylene glycol solution circulating pipeline 32 is provided with a mine exhaust waste heat recovery surface cooler 30, the mine exhaust waste heat recovery surface cooler 30 is arranged in the outer side wall of the middle lower part of a mine exhaust static pressure tank 34 of a mine heat exchanger, the ethylene glycol solution can be used for preventing freezing in extreme low temperature weather, the wellhead air heater 27 is provided with an electric heating plate, the waste heat of mine exhaust is utilized to heat the greatest extent and heat is provided for the wellhead air heater, the heat utilization efficiency of mine exhaust air is improved;
further, the end connection of high pressure water pump 43 has high pressure to wash main pipe 55, the outflow end of high pressure washing main pipe 55 sets up switching valve 44 respectively, the other end of switching valve 44 is equipped with high pressure and washes main pipe 40, high pressure washes main pipe 40 and switching valve 44's the other end and all connects the interior high pressure of heat transfer pipe and washes scrubbing distribution pipe 56, set up high pressure washing shower nozzle 57 in the heat exchange tube of one side of high pressure washing scrubbing distribution pipe 56, high pressure washes scrubbing distribution pipe 56 and establishes and can set up the control moving speed according to the requirement of washing scrubbing on washing scrubbing high pressure hose guide rail 45, can realize the cleanness to the inside pipeline of device, the effectual mine of avoiding, dust around the ore hole gathers the scale deposit on heat exchanger wall and the inside of device or in the pipeline.
Further, a fresh air inlet temperature and humidity transmitter 21 is arranged inside the fresh air supply pipe 26, a fresh air supply pipe air pressure and air volume transmitter 20 is arranged at the port of the fresh air supply pipe 26, a heat exchanger mine air exhaust inlet temperature and humidity transmitter 53 and a heat exchanger mine air exhaust outlet temperature and humidity transmitter 54 are arranged below the mine air exhaust inlet static pressure box 3, the heat exchanger mine air exhaust inlet temperature and humidity transmitter 53 and the heat exchanger mine air exhaust outlet temperature and humidity transmitter 54 are arranged at the middle part of the static pressure box and fixed on the inner wall through a suspender, a fresh air pipe straight section at the rear end of the fresh air inlet divergent device 8 is provided with a fresh air inlet pipe air pressure and air volume transmitter 22, a fresh air supply temperature and humidity transmitter 23 is arranged at the rear port of the fresh air inlet divergent device 8, a fresh air inlet pipe and an extreme weather fresh air pressure and air volume transmitter 29 are arranged on the inner wall of a fresh air heat exchange air inlet box 9 at the outlet end of the fresh air inlet divergent device 8 22, a fresh air supply temperature and humidity transmitter 23 is arranged at the port teeth of the fresh air inlet gradual-expansion pressure reducing device 8, so that the air pressure and the temperature and humidity before and after heat exchange of fresh air and exhaust air in the device can be accurately monitored, a regulation and control reaction can be made at the first time when the air pressure and the temperature reach limit values, frost or ice is formed on the inner wall and the outer wall of the large-flow-channel heat exchange, dust is retained and scales are formed, and the running reliability of the device is improved;
furthermore, the outlet ends of the two fresh air inlet gradually-expanding devices 8 are arranged at the middle position of the fresh air heat exchange inlet static pressure box 9 to realize the uniform distribution of fresh air inlet of the large-runner heat exchanger 1, the inlet ends of the one-layer and the two-layer large-runner air-air heat exchangers 1 are respectively provided with a two-layer heat exchanger fresh air inlet electric regulating air valve 17 and a one-layer heat exchanger fresh air inlet electric regulating air valve 16, the fresh air fan 12 regulates and controls the air quantity in a frequency conversion mode, the fresh air quantity can be properly reduced to be reduced to 1 fan to operate when the meteorological temperature is higher but lower than 2 ℃, meanwhile, the fresh air inlet electric regulating air valve of each layer can locally regulate the fresh air inlet quantity of each layer of large-runner heat exchanger, and the frost melting during the duty overhaul and the frosting of the heat exchange tubes during the operation of the two-layer large-runner heat exchangers is realized.
Further, the mine air exhaust and inlet static pressure box 3 is provided with a mine air exhaust and inlet static pressure box pressure regulating plate 7 for controlling the static pressure in the air inlet static pressure box to be unchanged so as to maintain the mine air exhaust quantity of each layer of large-runner heat exchanger to be balanced, an adjustable regulating plate 5 connected by an automatically adjustable telescopic rod 6 is arranged in the mine air exhaust and heat exchange uniform air distribution box 18 so as to ensure that the static pressure in the mine air exhaust and heat exchange uniform air distribution box 18 is unchanged and is adjustable in different ventilation periods of a mine, the air quantity in each row of heat exchange tubes of the large-runner heat exchanger is maintained to be balanced, and the air resistance in different ventilation periods is kept to be smaller.
Further, the ends of the mine air exhaust switching device 28 and the fresh air supply pipe 26 are completely attached to the outer wall of the device shell in the non-heating season, the mine air exhaust switching device 28 and the fresh air supply pipe 26 are fixed to the device shell in a welding mode in the non-heating season, the fresh air supply pipe 26 and the mine air exhaust switching device 28 are connected stably in the non-heating season through welding, sealing of the connection position is guaranteed, and the harm of internal moisture flowing to backflow to the mine air exhaust main fan which stops running and freezing is avoided.
When the device is used, under the weather of low external temperature or extreme low temperature, the fresh air fan 12 in the device is used for frequency conversion regulation and control to reduce the air volume, the fresh air inlet electric regulating air valve 16 of the two-layer heat exchanger and the fresh air inlet electric regulating air valve 17 of the one-layer heat exchanger reduce the fresh air volume of each layer of large-flow-channel air heat exchanger 1 in turn to enter a defrosting mechanism, and meanwhile, the air heater 27, the fresh air heater 29 of the extreme low temperature weather, the water source heat pump 31, the ethylene glycol solution circulating pipeline 32, the heat pump circulating hot water pipeline 35, the mine air exhaust inlet temperature and humidity transmitter 53 of the heat exchanger, the mine air exhaust outlet temperature and humidity transmitter 54 of the heat exchanger, the air pressure and air volume transmitter 20 of the fresh air supply pipe, the fresh air supply temperature and air volume transmitter 21, the fresh air supply pipe air pressure and air volume transmitter 22, the fresh air supply temperature and air volume transmitter 23, the mine air exhaust inlet pressure transmitter 14 of the heat exchanger, 14, The heat exchanger mine air exhaust outlet pressure transmitter 15 and the heat exchange tube outer wall are provided with a two-layer heat exchange tube outer wall temperature sensor 47 and a one-layer heat exchange tube outer wall temperature sensor 46 combined control platform 66, the heating power of the extreme low-temperature electric heater 29 and the air intake of each layer of large-flow-channel heat exchanger can be regulated according to the actually measured mine air exhaust front and rear air pressure limit value and temperature and humidity parameters, the heat exchange front and rear fresh air temperature change and the heat exchange tube outer wall temperature parameters, so that the temperature of the inner wall of the heat exchange tube is increased to ensure that the interior of the heat exchange tube is not frozen under the extreme weather condition, and meanwhile, the operation working condition of the water source heat pump 31 is adjusted to improve the heating efficiency of the air heater 27 in the wellhead house.
Claims (7)
1. The utility model provides an automatic adjustable even air distribution's mine heat transfer device that airs exhaust, includes well head room, tuber pipe and mine heat transfer device (52) that airs exhaust, its characterized in that: the novel air conditioning system is characterized in that a wellhead room fresh air static pressure box (24) is arranged outside the wellhead room, a wellhead room fresh air louver air supply opening (25) is embedded in a wellhead room partial wall body laminated by the wellhead room fresh air static pressure box (24), a wellhead air heater (27) is arranged on the opposite wellhead room lower wall body of the wellhead room fresh air louver air supply opening (25), a fresh air supply pipe (26) is arranged at the other end of the wellhead room fresh air static pressure box (24), a fresh air supply pipe air pressure and an air volume transmitter (20) are arranged on a straight pipe section of the fresh air supply pipe (26), a fresh air outlet reducing device (60) is arranged at the other end of the fresh air outlet reducing device (60), a fresh air heat exchange air supply box (10) is arranged at the other end of the fresh air outlet reducing device (60), a fresh air supply temperature and humidity transmitter (21) is arranged at the outlet of the fresh air outlet reducing device (60), 2 fresh air inlet gradually-expanding devices (8) are arranged on the outer side of the fresh air heat exchange inlet static pressure box (9), the other end of each fresh air inlet gradually-expanding device (8) is connected with a fresh air fan outlet section air pipe (61), the fresh air fan outlet section air pipes (61) are respectively connected with two fresh air fans (12),
a mine exhaust fan air-out connecting box (2) is arranged at one end inside the mine exhaust air heat exchange device (52), two mine exhaust air switching devices (28) in non-heating seasons are arranged at an air inlet end of the mine exhaust fan air-out connecting box (2) and connected with 1 spare mine exhaust main fans in parallel, an air outlet end of the mine exhaust fan air-out connecting box (2) is connected with a mine exhaust air inlet static pressure box (3), a mine exhaust air inlet static pressure box pressure regulating plate (7) is arranged in the mine exhaust air inlet static pressure box (3), a large-runner air-air heat exchanger (1) with two components arranged in two layers is arranged at one side of the mine exhaust air inlet static pressure box pressure regulating plate (7), a fresh air heat exchange air supply box (10) is connected with a fresh air outlet end of the large-runner air-air heat exchanger (1), and an overhaul channel (62) is arranged in the middle position of the large-runner air-air heat exchanger (1), the other end of the large-runner wind-wind heat exchanger (1) is connected with a fresh air heat exchange air inlet static pressure box (9), the middle of the fresh air heat exchange air inlet static pressure box (9) is provided with an extreme low temperature weather fresh air electric heater (29), the large-runner wind-wind heat exchanger (1) is provided with a first-layer heat exchange tube outer wall temperature sensor (47) and a second-layer heat exchange tube outer wall temperature sensor (46), the connecting end of the first-layer large-runner wind-wind heat exchanger (1) and the fresh air heat exchange air inlet static pressure box (9) is provided with a first-layer heat exchanger fresh air inlet electric adjusting air valve (17), the connecting end of the second-layer large-runner wind-wind heat exchanger (1) and the fresh air heat exchange air inlet static pressure box (9) is provided with a second-layer heat exchanger fresh air inlet electric adjusting air valve (16),
the upper part of the large-flow-channel wind-wind heat exchanger (1) is provided with a mine air-exhaust uniform air-intake air distribution box (18), the lower part of the large-flow-channel wind-wind heat exchanger (1) is provided with a mine air-exhaust air return box (19), the top surface of the mine air-exhaust uniform air-intake air distribution box (18) is provided with an adjustable adjusting plate (5), one side of the adjustable adjusting plate (5) is provided with an automatically-adjustable telescopic rod (6), the adjustable adjusting plate (5) is connected with a reel driving shaft (11) and a reel driven shaft (13) at two ends of the mine air-exhaust uniform air-intake air distribution box (18), one end of the automatically-adjustable telescopic rod (6) is provided with a hydraulic control device (38) and an explosion-proof oil hydraulic pump (39), in addition, the bottom of the mine air-exhaust uniform air-intake air distribution box (18) is provided with a high-pressure flushing decontamination distribution pipe (56) in the heat exchange pipe, and the end part of the high-pressure flushing decontamination distribution pipe (56) in the heat exchange pipe is provided with a high-flushing nozzle (57), the high-pressure flushing decontamination distribution pipe (56) in the heat exchange pipe is provided with a flushing decontamination high-pressure hose guide rail (45), the flushing decontamination high-pressure hose guide rail (45) is arranged at the inner side of an air exhaust uniform air inlet air distribution box (18) of a mine above a large-flow-channel air heat exchanger (1), a heat exchanger condensed water drainage floor drain (58) is arranged below an air exhaust return box (19) of a mine below the large-flow-channel air heat exchanger (1) on the second layer, the lower end of the heat exchanger condensed water drainage floor drain (58) is provided with a heat exchanger condensed water drainage vertical pipe (59), the bottom end of the heat exchanger condensed water drainage vertical pipe (59) is connected into a condensed water drainage pipe (37) with a slope, the condensed water drainage pipe (37) is buried under a frozen soil layer and is connected into a mine condensed water collection pit (36) for air exhaust according to a certain slope, the bottom of the mine condensed water collection pit (36) for air exhaust is provided with a mine condensed water exhaust heat tracing drainage pipe (49) for condensed water exhaust, the mine air exhaust return air box (19) above the mine air exhaust condensation water collecting pit (36) side is provided with a heat exchanger mine air exhaust outlet (33), the heat exchanger mine air exhaust outlet (33) is connected with a heat exchanger mine air exhaust static pressure box (34), the top end of the heat exchanger mine air exhaust static pressure box (34) is provided with a mine air exhaust total discharge port (63), the inner side surface of the bottom of the heat exchanger mine air exhaust static pressure box (34) is provided with a mine air exhaust waste heat recovery surface cooler (30), the mine air exhaust waste heat recovery surface cooler (30) is provided with an ethylene glycol solution circulating pipeline (32), the other side of the ethylene glycol solution circulating pipeline (32) is provided with a water source heat pump (31), the other end of the water source heat pump (31) is provided with a heat pump circulating hot water pipeline (35), and the heat pump circulating hot water pipeline (35) is respectively provided with a flushing and cleaning heat preservation hot water tank (41) and a wellhead air heater (27), the inside of washing heat preservation hot-water tank (41) for decontamination is provided with high-pressure water pump (43), the end connection of high-pressure water pump (43) has high pressure to wash main pipe (55), the outflow end that high pressure washed main pipe (55) sets up switching valve (44) respectively, the other end that switches valve (44) is equipped with high pressure and washes main pipe (40), high pressure washes the other end of main pipe (40) and switching valve (44) and all connects high pressure in the heat exchanger and washes decontamination distributing pipe (56), set up high pressure washing nozzle (57) in the heat exchange tube of one side of high pressure washing decontamination distributing pipe (56).
2. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 1, characterized in that: still include sparge water moisturizing pipe (48), the one end of sparge water moisturizing pipe (48) is pegged graft under the frozen soil layer, the bottom of sparge water moisturizing pipe (48) is connected with clean water pump (51), clean water pump (51) set up in clean water basin (65), and clean water basin (65) front end is equipped with mine condensation water purification installation (50) of airing exhaust, the one end surface of mine condensation water purification installation (50) of airing exhaust is provided with mine condensation water heat tracing drain pipe (49), mine condensation water purification installation (50) of airing exhaust establishes in condensation water drain pipe (64), the upper end of mine condensation water heat tracing drain pipe (49) of airing exhaust is connected at mine condensation water sump pit (36) bottom of airing exhaust and is buried below the frozen soil layer.
3. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 2, characterized in that: the straight tube section of new trend blast pipe (26) is provided with new trend blast pipe wind pressure and air transducer (20), the air inlet end of new trend blast pipe (26) is provided with new trend air inlet temperature and humidity transmitter (21), the inside of mine air inlet static pressure case (3) of airing exhaust is provided with heat exchanger mine air exhaust import temperature and humidity transmitter (53), the heat exchanger mine air exhaust export temperature and humidity transmitter (54) of heat exchanger mine air outlet static pressure case (34), heat exchanger mine air exhaust import temperature and humidity transmitter (53) and heat exchanger mine air exhaust export temperature and humidity transmitter (54) set up at static pressure case middle part, the new trend air inlet expands the new trend tuber pipe section of pressure relief device (8) rear end gradually and is provided with new trend blast pipe wind pressure and air transducer (22), the back port department of new trend air inlet divergent device (8) is provided with new trend air supply temperature and humidity transmitter (23), and an extreme weather fresh air electric heater (29) is arranged in the fresh air heat exchange air inlet static pressure box (9) at the outlet end of the fresh air inlet divergent device (8).
4. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 1, characterized in that: the water source heat pump (31) is connected with a high-pressure water pump (43) and a heat pump circulating hot water pipeline (35), a heat pump circulating hot water heater (42) is arranged in a heat preservation hot water tank (41) at the other end of the heat pump circulating hot water pipeline (35) for flushing and cleaning dirt, an auxiliary electric heating plate is arranged inside the heat pump circulating hot water heater (42), and a mine waste heat recovery surface cooler (30) is arranged in an air exhaust static pressure tank (34) of a heat exchanger mine of the water source heat pump (31).
5. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 1, characterized in that: the outlet end of the 2 fresh air inlet divergent devices (8) is arranged at the middle position of a fresh air heat exchange inlet static pressure box (9), the mine air exhaust inlet static pressure box (3) is provided with a mine air exhaust inlet static pressure box pressure regulating plate, and an adjustable regulating plate (5) connected by an automatically adjustable telescopic rod (6) is arranged in a mine air exhaust heat exchange uniform air distribution box (18).
6. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 1, characterized in that: the mine air exhaust switching device (28) and the fresh air supply pipe (26) are completely attached to the outer wall of the device shell in the non-heating season, and the mine air exhaust switching device (28) and the fresh air supply pipe (26) are fixed to the device shell in the non-heating season through welding.
7. The mine air exhaust heat exchange device capable of automatically adjusting and uniformly distributing air according to claim 3, characterized in that: the device comprises a two-layer heat exchanger fresh air inlet electric adjusting air valve (16), a one-layer heat exchanger fresh air inlet electric adjusting air valve (17), a fresh air supply pipe air pressure and air volume transmitter (20), a fresh air supply temperature and humidity transmitter (21), a fresh air supply pipe air pressure and air volume transmitter (22), a fresh air inlet temperature and humidity transmitter (23), a non-heating season mine air exhaust switching device (28), an extreme low temperature weather fresh air electric heater (29), a high pressure water pump (43), a flushing and cleaning high pressure hose automatic guide rail (45), a two-layer heat exchange pipe outer wall temperature sensor (46), a one-layer heat exchange pipe outer wall temperature sensor (47), a mine air exhaust condensation water purification device (50), a clean water pump (51), a heat exchanger mine air exhaust inlet temperature and humidity transmitter (53), and a test signal line and a control signal line of a heat exchanger air exhaust outlet temperature and humidity transmitter (54) are connected into a test control platform (66), the automatic data acquisition of the device is realized, and different control schemes are implemented according to the measured data and the set limit value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791297.8A CN113464189B (en) | 2021-07-13 | 2021-07-13 | Automatic adjustable mine heat transfer device that airs exhaust that evenly distributes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110791297.8A CN113464189B (en) | 2021-07-13 | 2021-07-13 | Automatic adjustable mine heat transfer device that airs exhaust that evenly distributes |
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| CN113464189A CN113464189A (en) | 2021-10-01 |
| CN113464189B true CN113464189B (en) | 2022-06-14 |
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| CN114184064B (en) * | 2021-12-15 | 2024-03-08 | 中国矿业大学 | Vertical cross type mine return air heating fresh air heat exchanger and heat exchange method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207377593U (en) * | 2017-10-19 | 2018-05-18 | 北京中矿赛力贝特节能科技有限公司 | Mine return air Cryo Heat Tube heat-exchange system |
| CN110094224A (en) * | 2018-08-09 | 2019-08-06 | 北京中矿赛力贝特节能科技有限公司 | A kind of return air residual heat in mine utilizes system and control method |
| CN211692533U (en) * | 2020-03-04 | 2020-10-16 | 山西文龙中美环能科技股份有限公司 | Shaft anti-freezing system based on direct heat exchange type heat energy recovery |
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- 2021-07-13 CN CN202110791297.8A patent/CN113464189B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207377593U (en) * | 2017-10-19 | 2018-05-18 | 北京中矿赛力贝特节能科技有限公司 | Mine return air Cryo Heat Tube heat-exchange system |
| CN110094224A (en) * | 2018-08-09 | 2019-08-06 | 北京中矿赛力贝特节能科技有限公司 | A kind of return air residual heat in mine utilizes system and control method |
| CN211692533U (en) * | 2020-03-04 | 2020-10-16 | 山西文龙中美环能科技股份有限公司 | Shaft anti-freezing system based on direct heat exchange type heat energy recovery |
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