CN112503615A - Modular ventilation air heat pump unit and mine exhaust air waste heat recovery method - Google Patents
Modular ventilation air heat pump unit and mine exhaust air waste heat recovery method Download PDFInfo
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- CN112503615A CN112503615A CN201910873076.8A CN201910873076A CN112503615A CN 112503615 A CN112503615 A CN 112503615A CN 201910873076 A CN201910873076 A CN 201910873076A CN 112503615 A CN112503615 A CN 112503615A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 203
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000004140 cleaning Methods 0.000 claims abstract description 54
- 238000009826 distribution Methods 0.000 claims abstract description 39
- 238000004321 preservation Methods 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000009792 diffusion process Methods 0.000 claims description 86
- 238000012423 maintenance Methods 0.000 claims description 8
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
- F24D11/0235—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy
- F24D11/0242—Central heating systems using heat accumulated in storage masses using heat pumps water heating system with recuperation of waste energy contained in exhausted air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
Abstract
The invention relates to a modular ventilation air heat pump unit and a mine exhaust waste heat recovery method, which comprise an external unit enclosure structure unit, a heat pump thermodynamic system unit, a mine exhaust air heat exchanger cleaning unit and a power distribution control unit, wherein the external unit enclosure structure unit comprises a unit vertical face outer layer heat preservation protection plate, a top face outer layer heat preservation protection plate and a base, the heat pump thermodynamic system unit comprises at least one group of heat pump mechanisms, a water-working medium heat exchanger is provided with a water exchange water inlet and a water exchange water outlet, the mine exhaust air heat exchanger cleaning unit comprises a cleaning pressure pump, a cleaning electromagnetic valve and a one-way valve, and a cleaning liquid main pipe is connected with a fan-shaped nozzle arranged on the air inlet side of the mine exhaust. The invention combines the existing split type compression condensing unit and the direct evaporation heat collector into a whole, greatly reduces the engineering installation cost and the unit debugging cost, can meet various installation directions of the coal mine ventilation air methane heat pump, and simultaneously increases the automatic cleaning function.
Description
Technical Field
The invention relates to a mine exhaust heat pump, in particular to a modular ventilation air heat pump unit and a mine exhaust waste heat recovery method.
Background
Along with the gradual enhancement of energy-saving consciousness at home and abroad, the mine exhaust air (also called ventilation air) heat pump technology is widely applied to the field of mining energy saving, the mine exhaust air has the characteristics of large air quantity, stable air temperature, large relative humidity and good continuity, is a good low-temperature waste heat resource of a heat pump, and can extract the waste heat in the exhaust air through the heat pump technology, thereby meeting the requirements of building heating, bath hot water preparation and wellhead anti-freezing heat consumption of mining enterprises.
At present, in the technical field of mine exhaust waste heat utilization, two different technical routes are mainly available: one is to adopt the water spray formula to get the heat technique, and its principle is to adopt low-temperature water "to spray" the mode in the mine passageway of airing exhaust, through the heat and mass transfer mode of water and the direct contact of mine air exhaust, extract the heat from the mine air exhaust, promote the temperature of water, recycle water source heat pump technique and extract the heat from the aquatic, prepare hot water, make the water temperature reduce the back cycle use simultaneously, this route is called "water spray formula and gets the heat technique", that is "mine waste heat secondary heat transfer that airs exhaust" utilizes the technique. The other is a split direct evaporation type heat extraction technology, which is characterized in that a heat pump evaporator is directly arranged in a mine exhaust channel, low-temperature and low-pressure refrigerant liquid is evaporated in the evaporator to directly extract heat from mine exhaust air, refrigerant working media are connected with a heat pump compression condensing unit through pipelines, hot water is directly prepared by utilizing heat pump compression condensing, and the route is called as a direct evaporation type heat extraction technology, namely a mine exhaust air waste heat primary heat exchange utilization technology.
However, the existing mine air exhaust heat pump heat supply technology has the following problems:
the water spraying type heat taking technology is high in power consumption during operation, on one hand, the heat transfer effect requires large water spraying amount, atomization is good, and the water spraying circulating water amount requires large, so that the power consumption of the water spraying circulating water pump is high; on the other hand, the water spraying circulation pump has high power consumption due to the fact that impurities in the circulation water spraying are more, the requirement for high filter mesh number and high resistance is met; the power consumption of the circulating water pump accounts for more than 25% of the total power consumption of the heating system; the nozzle is easy to block, and the maintenance workload is large; corrosive substances are easy to accumulate, and the service life of equipment is influenced; the system is complex and the investment is large; the operation cost is high.
The split direct evaporation type heat extraction technology also has some problems, such as large field installation work amount of unit equipment, difficult debugging and high project cost; the mine exhaust heat collector is vertically installed, and the wind direction of inlet and outlet wind is horizontal, so that certain installation limitation is applied to some regions with wind direction requirements; the customized production is required, one ore and one machine cannot be used for batch production, and the production cost is high; the mine exhaust heat collector is vertically installed, and condensed water (or defrosted water) needs to be discharged at a cold side during heat collection, so that the phenomenon of ice freezing exists.
Disclosure of Invention
The invention aims at the problems, adopts a modularized integral design idea and provides a modular ventilation air heat pump unit, and integrates a direct evaporation type heat collector, a compressor, a water heat exchanger, a fan, power distribution control and the like of a mine exhaust air heat pump unit into an integral unit so as to reduce the installation cost and increase the system reliability. Meanwhile, a brand-new mine exhaust waste heat recovery method is provided based on various application modes of the modular ventilation air heat pump unit.
In order to achieve the purpose, the invention provides a modular ventilation air heat pump unit, which comprises an external unit enclosure structure unit, a heat pump thermodynamic system unit, a mine exhaust air heat exchanger cleaning unit and a power distribution control unit, wherein the external unit enclosure structure unit comprises a unit vertical face external heat preservation protection plate arranged on the side face, a top face external heat preservation protection plate arranged on the top face and a base arranged at the bottom, the heat pump thermodynamic system unit comprises at least one group of heat pump mechanisms, the heat pump mechanism comprises a compressor, a water-working medium heat exchanger, an expansion valve, a mine exhaust air heat exchanger and a gas-liquid separator which are sequentially and circularly connected, a water exchange water inlet and a water exchange water outlet are arranged on the water-working medium heat exchanger, the mine exhaust air heat exchanger cleaning unit comprises a cleaning pressure pump, a cleaning electromagnetic valve and a one-way valve which, the cleaning fluid main pipe is connected with a fan-shaped nozzle arranged on the air inlet side of the mine air exhaust heat exchanger through a cleaning distribution pipe, and the power distribution control unit comprises a power distribution control cabinet, micro-pressure difference sensors and temperature and pressure sensors which are arranged on two sides of the mine air exhaust heat exchanger.
Preferably, the heat pump thermodynamic system unit comprises two groups of heat pump mechanisms arranged in parallel, and the two groups of heat pump mechanisms arranged in parallel share one water-working medium heat exchanger.
Preferably, the heat pump mechanism further comprises a fan arranged on the top surface outer layer heat preservation protection plate on the upper side of the mine exhaust heat exchanger.
Preferably, when the modular ventilation air methane heat pump unit works, ventilation air methane enters from the base, exchanges heat through the mine exhaust air heat exchanger and then is discharged from the top surface.
Preferably, the bottom of the mine exhaust heat exchanger is provided with a water tray, and the bottom of the water tray is provided with a water tray drainage pipe.
Preferably, when the differential pressure fed back by the micro differential pressure sensor reaches or exceeds a set differential pressure, the power distribution control cabinet controls the cleaning electromagnetic valve and the cleaning pressure pump to be opened, and cleaning liquid is sent to the fan-shaped nozzles through the cleaning liquid main pipe and the cleaning distribution pipe to clean the mine exhaust heat exchanger; and when the differential pressure fed back by the micro differential pressure sensor is lower than the set return difference, the power distribution control cabinet controls the cleaning electromagnetic valve and the cleaning pressure pump to be closed.
The invention also provides a method for recovering the waste heat of the mine exhaust air, which comprises the steps of arranging two layers of diffusion chambers at the exhaust outlet of the adit of a mine, and arranging a double-open heat-preservation closed gate at one layer of the diffusion chamber and a middle-rotation heat-preservation closed exhaust gate used in the non-heat supply period;
the modular ventilation air methane heat pump units are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units are respectively connected with a user hot water main water supply pipe and a user hot water main water return pipe, wherein the unit water outlets and the unit water inlets are respectively communicated with a water exchange water outlet and a water exchange water inlet.
The invention also provides a mine exhaust waste heat recovery method, which comprises the steps that two layers of diffusion chambers are arranged at the outlet of the mine disrotatory exhaust diffusion pipe, a disrotatory fan exhaust pipe, a disrotatory fan diffusion pipe air outlet soft joint and a diffusion chamber structure support are arranged at one layer of the diffusion chambers, and a disrotatory fan exhaust air outlet, a middle-rotation type heat-preservation closed exhaust door used in a non-heat supply period and a heat-preservation maintenance structure are arranged at the two layers of the diffusion chambers;
the modular ventilation air methane heat pump units are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units are respectively connected with a user hot water main water supply pipe and a user hot water main water return pipe, wherein the unit water outlets and the unit water inlets are respectively communicated with a water exchange water outlet and a water exchange water inlet.
The invention also provides a mine exhaust waste heat recovery method, which comprises the steps that three layers of diffusion chambers are arranged at the outlet of the mine axial flow exhaust diffusion tower, an axial flow fan and an exhaust diffusion tower are arranged at one layer of the diffusion chamber, and an axial flow fan distribution room, a pedestrian staircase, a user hot water main water supply pipe and a user hot water main water return pipe are arranged at one layer of the diffusion chamber;
the two layers of the diffusion chamber are provided with a mine exhaust heat pump power distribution control cabinet and centralized control terminal equipment thereof, a user hot water circulating pump, a water system water replenishing tank and a water replenishing pump;
the three layers of the diffusion chamber are provided with an air outlet of a diffusion tower of the axial flow fan, a middle-rotation type heat-preservation closed exhaust door used in a non-heat-supply period and a heat-preservation maintenance structure;
the modular ventilation air methane heat pump units are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units are respectively connected with a user hot water main water supply pipe and a user hot water main water return pipe, wherein the unit water outlets and the unit water inlets are respectively communicated with a water exchange water outlet and a water exchange water inlet.
Based on the technical scheme, the invention has the advantages that:
1. the whole machine is installed, so that the installation cost of field engineering is greatly reduced;
2. the unit is upward air outlet and is not limited by the wind direction requirement of an installation site;
3. the two devices are in reverse heat exchange, the heat exchange effect is good, the unit energy efficiency is high, and the outlet water temperature is high;
4. a condensed water disc of the mine exhaust heat collector is arranged on the hot side, and an anti-freezing device is not required to be added;
5. considering that the mine exhaust air contains part of solid particles which can be adsorbed on the fins, the mine exhaust air heat collector of the unit is provided with an automatic cleaning function;
6. the unit can be directly produced in batches in a factory without special customized production, and the quality and the performance of the unit are reliably guaranteed;
7. and the modular design and batch production are adopted, so that the production cost can be greatly reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a block diagram of a modular ventilation heat pump unit system;
FIG. 2 is a schematic diagram of arrangement of one layer of an air exhaust diffusion chamber in an adit of a mine;
FIG. 3 is a schematic view of the arrangement of the roof of an adit air-exhausting diffusion chamber of a mine;
FIG. 4 is a schematic cross-sectional view of an adit air-exhaust diffusion chamber of a mine;
FIG. 5 is a schematic diagram of arrangement of one layer of counter-rotating exhaust diffusion chambers in mines;
FIG. 6 is a schematic diagram of arrangement of two layers of counter-rotating exhaust diffusion chambers in mines;
FIG. 7 is a schematic view of the arrangement of the roofs of the counter-rotating air-exhausting diffusion chambers in mines;
FIG. 8 is a schematic cross-sectional view of a counter-rotating exhaust diffusion chamber in a mine;
FIG. 9 is a schematic view of one layer arrangement of axial-flow air-exhausting diffusion chambers in mines;
FIG. 10 is a schematic diagram of the arrangement of two layers of axial-flow air-exhausting diffusion chambers in a mine;
FIG. 11 is a schematic diagram of three-layer arrangement of axial-flow air-exhausting diffusion chambers in mines;
FIG. 12 is a schematic view of the arrangement of the axial-flow air-exhausting diffusion chamber roof in a mine;
fig. 13 is a schematic cross-sectional view of an axial-flow exhaust diffusion chamber for mines.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The invention provides a modular ventilation air heat pump unit, which is shown in figure 1 and shows a preferred embodiment of the invention. The invention adopts the overall design scheme of a modular heat pump thermodynamic system, combines the existing split type compression condensing unit and the direct evaporation heat collector into a whole, greatly reduces the project installation cost and the unit debugging cost, adopts the inverted V-shaped design for the direct evaporation heat collector of the unit, can meet various installation directions of the coal mine ventilation air heat pump by air inlet from the bottom and air outlet from the upper part, and simultaneously increases the automatic cleaning function.
As shown in fig. 1, the modular ventilation air heat pump unit comprises an external unit enclosure structure unit, a heat pump thermodynamic system unit, a mine exhaust heat exchanger cleaning unit and a power distribution control unit, wherein the external unit enclosure structure unit comprises an external unit vertical surface heat preservation protection plate 13 arranged on the side surface, an external top surface heat preservation protection plate 14 arranged on the top surface and a base 15 arranged at the bottom, the heat pump thermodynamic system unit comprises at least one group of heat pump mechanisms, the heat pump mechanisms comprise a compressor 1, a water-working medium heat exchanger 8, an expansion valve 3, a mine exhaust heat exchanger 4 and a gas-liquid separator 2 which are sequentially connected in a circulating manner, a water exchange water inlet 9 and a water exchange water outlet 10 are arranged on the water-working medium heat exchanger 8, and the mine exhaust heat exchanger cleaning unit comprises a cleaning pressure pump 18, a cleaning electromagnetic valve 17, a water exchange, The cleaning liquid main pipe 16 is connected with a fan-shaped nozzle 6 arranged on the air inlet side of the mine exhaust heat exchanger 4 through a cleaning distribution pipe 7, and the power distribution control unit comprises a power distribution control cabinet 21, and a micro-pressure difference sensor 20 and a temperature pressure sensor which are arranged on two sides of the mine exhaust heat exchanger 4.
Preferably, when the modular ventilation air methane heat pump unit works, ventilation air methane enters from the base 15, exchanges heat through the mine exhaust air heat exchanger 4 and then is discharged from the top surface. A complete module unit structural framework and a mine ventilation heat preservation circulation channel from bottom to top are formed through a unit facade outer heat preservation protection plate 13, a top surface outer heat preservation protection plate 14 and a unit channel steel base 15, the base 15 adopts a mesh-shaped framework and can form a sealing surface with a unit foundation to prevent external ambient air from entering the unit, meanwhile, ventilation from bottom to top of the mine ventilation can be guaranteed, and in addition, a unit heat pump thermodynamic system unit and a pipeline can be supported and fixed.
As shown in fig. 1, the heat pump thermodynamic system unit includes two sets of heat pump mechanisms arranged in parallel, and the two sets of heat pump mechanisms arranged in parallel share one water-working medium heat exchanger 8, so as to save space and reduce cost.
When the heat pump thermodynamic system unit works, low-pressure and low-temperature thermodynamic working medium liquid enters the mine exhaust heat exchanger 4 pipe, meets the mine exhaust air with higher temperature flowing through the outer side of the mine exhaust heat exchanger 4 fin, and is driven by heat transfer temperature difference, the working medium is evaporated and gasified to obtain heat, so that the heat is changed into low-pressure and low-temperature gas. And the mine exhausted air loses heat, is cooled and dehumidified and then is exhausted out of the unit through the fan 5 or an air outlet, low-pressure low-temperature working medium gas is sucked by the compressor 1, and the compressor compresses the low-pressure low-temperature working medium gas into high-pressure high-temperature working medium gas under the drive of electric power and then sends the high-pressure high-temperature working medium gas into a heat exchange pipe of the water-working medium heat exchanger 8.
The water-working medium heat exchanger 8 is provided with a water exchange water inlet 9 and a water exchange water outlet 10, when the water meets the backwater of a user heat source flowing through the water-working medium heat exchanger 8 and flowing through the heat exchange pipe at a lower temperature, the working medium is condensed, liquefied and lost heat under the drive of heat transfer temperature difference to become high-pressure high-temperature liquid, the backwater of the user heat source is heated and then is pumped to a heat user by a circulating water pump at the user side, the unit completes the heating function, the high-pressure high-temperature working medium liquid is throttled and decompressed by an expansion valve 3 to become low-pressure low-temperature liquid, and then enters the mine exhaust heat exchanger 4 pipe.
Preferably, the heat pump mechanism further comprises a fan 5 arranged on the top surface outer insulation protection plate 14 on the upper side of the mine exhaust heat exchanger 4. The bottom of the mine exhaust heat exchanger 4 is provided with a water tray 11, and the bottom of the water tray 11 is provided with a water tray drain pipe 12.
As shown in fig. 1, the mine exhaust heat exchanger cleaning unit comprises a cleaning pressure pump 18, a cleaning electromagnetic valve 17 and a one-way valve 19 which are arranged on a cleaning liquid main pipe 16, and the cleaning liquid main pipe 16 is connected with a fan-shaped nozzle 6 arranged on the air inlet side of the mine exhaust heat exchanger 4 through a cleaning distribution pipe 7. When the differential pressure fed back by the micro differential pressure sensor 20 reaches or exceeds the set differential pressure, the power distribution control cabinet 21 controls the cleaning electromagnetic valve 17 and the cleaning pressure pump 18 to be opened, and cleaning liquid is sent to the fan-shaped nozzles 6 through the cleaning liquid main pipe 16 and the cleaning distribution pipe 7 to clean the mine exhaust heat exchanger 4; when the differential pressure fed back by the micro differential pressure sensor 20 is lower than the set return difference, the power distribution control cabinet 21 controls the cleaning electromagnetic valve 17 and the cleaning pressurization pump 18 to be closed.
The power distribution control unit comprises a power distribution control cabinet 21, micro-differential pressure sensors 20 arranged on two sides of the mine exhaust air heat exchanger 4 and a temperature pressure sensor. The power distribution control unit realizes the standard power distribution function of the unit according to the power distribution requirement of unit equipment and the mine power utilization safety requirement, controls a hard software system, completes various protection and alarm functions required by the unit according to the comparison of the real-time parameters of the pressure sensor and the temperature sensor of the micro-differential pressure sensor and the unit thermodynamic system and the set parameters, and displays the statistical transmission function and the heat supply and demand real-time balance control function.
The modular ventilation air heat pump unit has the following advantages:
1. the whole machine is installed, so that the installation cost of field engineering is greatly reduced;
2. the unit is upward air outlet and is not limited by the wind direction requirement of an installation site;
3. the two devices are in reverse heat exchange, the heat exchange effect is good, the unit energy efficiency is high, and the outlet water temperature is high;
4. a condensed water disc of the mine exhaust heat collector is arranged on the hot side, and an anti-freezing device is not required to be added;
5. considering that the mine exhaust air contains part of solid particles which can be adsorbed on the fins, the mine exhaust air heat collector of the unit is provided with an automatic cleaning function;
6. the unit can be directly produced in batches in a factory without special customized production, and the quality and the performance of the unit are reliably guaranteed;
7. and the modular design and batch production are adopted, so that the production cost can be greatly reduced.
The modular ventilation air heat pump unit can be applied to the ventilation of the conventional mine at present, such as ventilation of adit of mine, contra-rotation ventilation of mine, axial flow ventilation of mine and the like. As shown in fig. 2 to 11, the invention provides a series of brand-new mine exhaust air waste heat recovery methods based on various application modes of the modular ventilation air heat pump unit.
Example 1
The invention provides a method for recovering waste heat of mine exhaust air, which comprises the steps of arranging two layers of diffusion chambers at an exhaust outlet of a adit of a mine, and arranging a double-open heat-preservation closed gate 2-1 at one layer of the diffusion chamber and a middle-rotation type heat-preservation closed exhaust gate 2-2 used in a non-heat supply period; the modular ventilation air methane heat pump units 22 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units 22 are respectively connected with a user hot water main water supply pipe 3-1 and a user hot water main water return pipe 3-2, wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets 10 and the water exchange water inlets 9.
The application of the modularized mine air exhaust (ventilation air) heat pump unit in the mine underground ventilation occasion comprises that a layer of diffusion chamber is arranged at an underground ventilation outlet, and a double-open heat-insulation closed big door 2-1 for mine personnel to enter and exit from a motor-driven device and a middle-rotation heat-insulation closed exhaust door 2-2 for a non-heat supply period are arranged at one layer of the diffusion chamber; the modular mine air exhaust (ventilation air methane) heat pump unit heat supply system is arranged on the roof of the diffusion chamber in groups and comprises a modular ventilation air methane heat pump unit 22, a user hot water supply and return water engineering system and a distribution control cable engineering system.
The mine adit air exhaust mode is one of the common ventilation modes in non-coal mines, and the ventilator is arranged underground and directly exhausts air through the adit. In the embodiment, the low-level heat energy in the air exhaust of the footrill is fully extracted by the modular ventilation air heat pump unit, the high-level heat energy is obtained by the modular ventilation air heat pump unit, and then the high-level heat energy is sent to a user side by the circulating water system to complete the heat supply function of the system.
Example 2
The invention also provides a mine exhaust waste heat recovery method, as shown in figures 5-8, which comprises the steps of arranging two layers of diffusion chambers on the outlet of the counter-rotating exhaust diffusion pipe of a mine, arranging a counter-rotating fan 5-1, a counter-rotating fan exhaust pipe 5-2, a counter-rotating fan diffusion pipe air outlet soft connection 5-3 and a diffusion chamber structure support on one layer of the diffusion chamber, and arranging a counter-rotating fan exhaust air outlet 6-1, a middle-rotating heat-preservation closed exhaust door 2-2 used in a non-heat supply period and a heat preservation maintenance structure on the two layers of the diffusion chambers.
The modular ventilation air methane heat pump units 22 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units 22 are respectively connected with a user hot water main water supply pipe 3-1 and a user hot water main water return pipe 3-2, wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets 10 and the water exchange water inlets 9.
The contra-rotating air exhaust mode of mines is one of the ventilation modes commonly adopted by coal mines in China, and a contra-rotating ventilator is arranged on the mine and exhausts air by adopting a lower diffusion pipe. The modularized ventilation air heat pump unit is applied to the counter-rotating air exhaust occasion of a mine, and comprises two layers of diffusion chambers arranged on the outlets of counter-rotating air exhaust diffusion pipes, wherein one layer of the diffusion chamber comprises counter-rotating air fan exhaust pipes 5-2, counter-rotating air fan diffusion pipe air outlets 5-3 and the like which are in soft connection with the diffusion chamber structure supporting parts; the two-layer diffusion chamber is provided with a contra-rotating fan air outlet 6-1, a middle-rotating heat-preservation closed exhaust door 2-2 used in a non-heat-supply period and a heat-preservation maintenance structure; the roof of the diffusion chamber is arranged similarly to the roof of the embodiment 1, and modular mine exhaust air (ventilation air methane) heat pump unit heat supply systems are arranged in groups and comprise a modular ventilation air methane heat pump unit 22, a user hot water supply and return water engineering system and a distribution control cable engineering system.
In the embodiment, the low-level heat energy in the counter-rotating exhaust air of the mine is fully extracted by the modular mine exhaust air (ventilation air methane) heat pump unit, the high-level heat energy is obtained by the modular ventilation air methane heat pump unit, and then the high-level heat energy is sent to a user side by the circulating water system to complete the heat supply function of the system.
Example 3
The invention also provides a mine exhaust waste heat recovery method, as shown in fig. 9-13, comprising the steps of arranging three layers of diffusion chambers on the outlet of the mine axial flow exhaust diffusion tower, arranging an axial flow fan 9-1 and an exhaust diffusion tower 9-2 on one layer of the diffusion chamber, arranging an axial flow fan distribution room, a pedestrian stairwell, a user hot water main water supply pipe 3-1 and a user hot water main water return pipe 3-2; a mine exhaust heat pump power distribution control cabinet 10-1 and a centralized control terminal device 10-2 thereof, a user hot water circulating pump 10-3, a water system water supplementing tank 10-4 and a water supplementing pump 10-5 are arranged on the second layer of the diffusion chamber; and three layers of the diffusion chamber are provided with an air outlet 11-1 of a diffusion tower of the axial flow fan, a middle-rotation type heat-preservation closed exhaust door 2-2 used in a non-heat supply period and a heat-preservation maintenance structure.
The modular ventilation air methane heat pump units 22 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units 22 are respectively connected with a user hot water main water supply pipe 3-1 and a user hot water main water return pipe 3-2, wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets 10 and the water exchange water inlets 9.
The axial-flow air exhaust mode of mine is one of the common air exhaust modes used in coal mine in China, and its axial-flow fan is set on the mine and adopts higher diffusion tower to exhaust air. The modularized ventilation air heat pump unit is applied to axial flow air exhaust occasions of mines and mines, and comprises three layers of diffusion chambers arranged at the outlet of an axial flow air exhaust diffusion tower, wherein one layer comprises an axial flow fan 9-1, an air exhaust diffusion tower 9-2, an axial flow fan distribution room, a pedestrian stairwell, a user hot water inlet and outlet main pipe and the like; the second layer is provided with a mine exhaust heat pump power distribution control cabinet 10-1 and a centralized control terminal device 10-2 thereof, a user hot water circulating pump 10-3, a water system water replenishing tank 10-4, a water replenishing pump 10-5, a user hot water pipeline system and the like; the three-layer diffusion chamber comprises an air outlet 11-1 of a diffusion tower of the axial flow fan, a middle-rotation type heat-preservation closed exhaust door 2-2 used in the period of non-heat supply, a heat-preservation structure part of the diffusion chamber and the like; the modular mine air exhaust (ventilation air methane) heat pump unit heat supply system is arranged on the roof of the diffusion chamber in groups and comprises a modular ventilation air methane heat pump unit 22, a user hot water supply and return water engineering system and a distribution control cable engineering system.
In the embodiment, the low-level heat energy in axial-flow exhaust air of the mine is fully extracted through the modular mine exhaust air (ventilation air) heat pump unit, the high-level heat energy is obtained through the modular ventilation air heat pump unit, and then the high-level heat energy is sent to a user side through the circulating water system to complete the heat supply function of the system.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a modular ventilation air heat pump unit which characterized in that: including outer envelope unit of unit, heat pump thermodynamic system unit, mine heat exchanger cleaning unit and distribution control unit of airing exhaust, the outer envelope unit of unit is including setting up at the outer heat preservation guard plate of unit facade (13) of side, setting up at the outer heat preservation guard plate of top surface (14) of top surface and setting up base (15) in the bottom, heat pump thermodynamic system unit includes at least a set of heat pump mechanism, heat pump mechanism is including circulation connection's compressor (1), water-working medium heat exchanger (8), expansion valve (3), mine heat exchanger (4) of airing exhaust, vapour and liquid separator (2) in proper order, be equipped with water on water-working medium heat exchanger (8) and trade inlet (9) and water and trade outlet (10), mine heat exchanger cleaning unit of airing exhaust is including setting up washing force (18) on washing liquid person in charge (16), The mine air exhaust heat exchanger cleaning device comprises a cleaning electromagnetic valve (17) and a one-way valve (19), wherein a cleaning liquid main pipe (16) is connected with a fan-shaped nozzle (6) arranged on the air inlet side of the mine air exhaust heat exchanger (4) through a cleaning distribution pipe (7), and a power distribution control unit comprises a power distribution control cabinet (21), and a micro-pressure difference sensor (20) and a temperature pressure sensor which are arranged on two sides of the mine air exhaust heat exchanger (4).
2. The modular ventilation air heat pump unit according to claim 1, characterized in that: the heat pump thermodynamic system unit comprises two groups of heat pump mechanisms which are arranged in parallel, and the two groups of heat pump mechanisms which are arranged in parallel share one water-working medium heat exchanger (8).
3. The modular ventilation air heat pump unit according to claim 1, characterized in that: the heat pump mechanism also comprises a fan (5) arranged on the top surface outer layer heat preservation protection plate (14) on the upper side of the mine exhaust heat exchanger (4).
4. The modular ventilation air heat pump unit according to claim 1, characterized in that: when the modular ventilation air methane heat pump unit works, ventilation air methane enters from the base (15) and is discharged from the top surface after being subjected to heat exchange through the mine air exhaust heat exchanger (4).
5. The modular ventilation air heat pump unit according to claim 1, characterized in that: the bottom of the mine air exhaust heat exchanger (4) is provided with a water tray (11), and the bottom of the water tray (11) is provided with a water tray drain pipe (12).
6. The modular ventilation air heat pump unit according to claim 1, characterized in that: when the differential pressure fed back by the micro differential pressure sensor (20) reaches or exceeds a set differential pressure, the power distribution control cabinet (21) controls the cleaning electromagnetic valve (17) and the cleaning pressure pump (18) to be opened, and cleaning liquid is sent to the fan-shaped nozzle (6) through the cleaning liquid main pipe (16) and the cleaning distribution pipe (7) to clean the mine exhaust heat exchanger (4); when the differential pressure fed back by the micro differential pressure sensor (20) is lower than the set return difference, the power distribution control cabinet (21) controls the cleaning electromagnetic valve (17) and the cleaning pressure pump (18) to be closed.
7. A method for recovering waste heat of mine exhaust air is characterized by comprising the following steps: the method comprises the steps that a layer of diffusion chamber is arranged at an air exhaust outlet of an adit of a mine, and a double-open heat-preservation closed gate (2-1) and a middle-rotation heat-preservation closed exhaust gate (2-2) used in a non-heat supply period are arranged on the layer of the diffusion chamber;
the modular ventilation air methane heat pump units (22) in any one of the claims 1-6 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units (22) are respectively connected with a user hot water main water supply pipe (3-1) and a user hot water main water return pipe (3-2), wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets (10) and the water exchange water inlets (9).
8. A method for recovering waste heat of mine exhaust air is characterized by comprising the following steps: the method comprises the steps that two layers of diffusion chambers are arranged on the outlet of a contra-rotating air exhaust diffusion pipe of a mine, a contra-rotating fan (5-1), a contra-rotating fan exhaust pipe (5-2), a contra-rotating fan diffusion pipe air outlet soft joint (5-3) and a diffusion chamber structure support are arranged on one layer of the diffusion chamber, and a contra-rotating fan air exhaust outlet (6-1), a middle-rotating heat-preservation closed exhaust door (2-2) used in a non-heat supply period and a heat preservation maintenance structure are arranged on the two layers of the diffusion chamber;
the modular ventilation air methane heat pump units (22) in any one of the claims 1-6 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units (22) are respectively connected with a user hot water main water supply pipe (3-1) and a user hot water main water return pipe (3-2), wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets (10) and the water exchange water inlets (9).
9. A method for recovering waste heat of mine exhaust air is characterized by comprising the following steps: the method comprises the steps that three layers of diffusion chambers are arranged at the outlet of an axial flow air exhaust diffusion tower of a mine, an axial flow fan (9-1) and an air exhaust diffusion tower (9-2) are arranged at one layer of the diffusion chambers, and an axial flow fan distribution room, a pedestrian staircase, a user hot water main water supply pipe (3-1) and a user hot water main water return pipe (3-2) are arranged;
a mine exhaust heat pump power distribution control cabinet (10-1) and a centralized control terminal device (10-2) thereof, a user hot water circulating pump (10-3), a water system water replenishing tank (10-4) and a water replenishing pump (10-5) are arranged on the second layer of the diffusion chamber;
three layers of the diffusion chamber are provided with an air outlet (11-1) of a diffusion tower of an axial flow fan, a middle-rotation type heat-preservation closed exhaust door (2-2) used in a non-heat supply period and a heat-preservation maintenance structure;
the modular ventilation air methane heat pump units (22) in any one of the claims 1-6 are arranged on the roof of the diffusion chamber in groups, and unit water outlets and unit water inlets of all the modular ventilation air methane heat pump units (22) are respectively connected with a user hot water main water supply pipe (3-1) and a user hot water main water return pipe (3-2), wherein the unit water outlets and the unit water inlets are respectively communicated with the water exchange water outlets (10) and the water exchange water inlets (9).
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