CN210153910U - Coal mine heat supply system taking mine exhaust air as low-temperature heat source - Google Patents
Coal mine heat supply system taking mine exhaust air as low-temperature heat source Download PDFInfo
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- CN210153910U CN210153910U CN201920841600.9U CN201920841600U CN210153910U CN 210153910 U CN210153910 U CN 210153910U CN 201920841600 U CN201920841600 U CN 201920841600U CN 210153910 U CN210153910 U CN 210153910U
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Abstract
The utility model relates to a colliery district heating technical field, concretely relates to use mine to air exhaust as colliery heating system of low temperature heat source. The heat exchange air duct (2) is horizontally arranged on the mine ground, and one end of the heat exchange air duct (2) is communicated with the mine exhaust duct (1); the air source heat pump is always in an optimal heating environment temperature zone above 4 ℃, and the energy efficiency ratio is about 2.5. Compared with an enthalpy-increasing air source heat pump with the energy efficiency ratio of less than 1.8 used in severe cold areas with the ambient temperature of-15 to-20 ℃, the energy efficiency ratio is improved by more than 35 percent. The coal mine heating system taking mine exhaust air as a low-temperature heat source is economical, stable and efficient in heat supply, has the functions of exhausting air and removing dust, protects the environment and is worthy of popularization.
Description
Technical Field
The utility model relates to a colliery district heating technical field, concretely relates to use mine to air exhaust as colliery heating system of low temperature heat source.
Background
In winter, a large amount of heat sources are needed for heat preservation of well mouths and building heating of coal mines in severe cold areas. In order to protect blue water sky, a new heat source must be selected after the small and medium-sized coal-fired boiler is shut down. The electric heating or natural gas is used as a heat source, so that the price is high and the economical efficiency is poor. The selection of air energy with the ambient temperature of 5-10 ℃ as a low-temperature heat source is a proper and good choice. However, when the ambient temperature is lower than-15 ℃, the heating temperature of the common air source heat pump is low, and the heating quantity is reduced; the enthalpy-increasing air source heat pump has low energy efficiency ratio and high failure rate, and during defrosting, the heat pump runs in reverse direction, heating is changed into refrigerating, the heating working condition is further deteriorated, the stable, economical and efficient heating requirements cannot be met, and the safety production of a coal mine is endangered.
In winter, the total air intake at the coal mine mouth must be over 2 ℃ according to the regulations of national coal mine safety regulations. Because the depth of a coal mine is hundreds of meters or thousands of meters, the exhaust duct of the coal mine extends to the ground from hundreds of meters, the exhaust air (ventilation air or return air) of the coal mine is mostly about 10-15 ℃ or even higher, the relative humidity is about 90%, and the heat pump is a good low-temperature heat source.
SUMMERY OF THE UTILITY MODEL
The to-be-solved problem of the utility model is to provide an ability make full use of mine is aired exhaust for the low temperature heat source, improves air source heat pump energy efficiency ratio, and reliable and stable colliery heating system.
The utility model discloses a realize through following technical scheme:
a coal mine heating system taking mine exhaust air as a low-temperature heat source comprises a mine exhaust duct, a heat exchange air duct and an air source heat pump;
the heat exchange air duct is horizontally arranged on the mine ground, and one end of the heat exchange air duct is communicated with the mine exhaust duct;
the air source heat pump is arranged outside the heat exchange air channel, and the evaporator of the air source heat pump is arranged inside the heat exchange air channel according to the requirements of strengthening convection heat exchange and reducing flow resistance.
Furthermore, a fan is arranged between the evaporator and the air inlet end in the heat exchange air duct.
Further, an air filter is arranged between the air adjusting fan and the evaporator.
Furthermore, the heat exchange air duct is a square or round pipe welded by steel plates, and the cross-sectional area of the heat exchange air duct is about 20 square meters. Low investment cost, short construction period and durability.
Compared with the prior art, the utility model the beneficial effect who gains as follows:
1. according to the required amount, the mine exhaust air at the temperature of about 10-15 ℃ is introduced into a heat exchange air duct from a mine exhaust duct by a fan, enters an evaporator of an air source heat pump to release heat, and the exhaust air with higher humidity releases both sensible heat and latent heat of water vapor, so that the heat release amount is large. By utilizing low-temperature heat extracted from exhaust air, the heat pump provides 60 ℃ hot water for a coal mine, the return water is 50 ℃, the heat supply requirement of the coal mine is met, the air source heat pump is always in an optimal heating environment temperature area above 4 ℃, the energy efficiency ratio is about 2.5, and compared with an enthalpy-increasing air source heat pump with the energy efficiency ratio below 1.8 used in severe cold areas with the environment temperature of-15 to-20 ℃, the energy efficiency ratio is improved by more than 35 percent, and the power consumption of the air source heat pump is reduced;
2. the temperature of the inlet air of the heat exchange air duct is 10-15 ℃, and the inlet air is discharged after passing through the evaporator and being cooled to more than 4 ℃. The evaporator can not be frosted, so that the defect of defrosting when the air source heat pump does not heat is overcome, and the heat supply is stable;
3. after dust removal by a filter arranged for preventing ash blockage of an evaporator, mine exhaust air is discharged due to high humidity and releases heat, water is condensed, if the displacement is 10000m for carrying out the year/min, about 10t/day of condensed water is produced every day, the condensed water can be used as reclaimed water, and the water is a good water resource;
4. the utility model discloses heat supply economy stabilizes high-efficient, has the dust removal function of airing exhaust concurrently, is worth promoting.
Drawings
FIG. 1 is a schematic view of a coal mine heating system using mine exhaust air as a low-temperature heat source according to the present invention;
FIG. 2 is a schematic view of the internal structure of the heat exchange air duct of the present invention;
in the figure: 1. the system comprises a mine exhaust duct 2, a heat exchange air duct 3, an air source heat pump 4, an evaporator 5, a fan 6, an air filter 7 and an exhaust outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. The described embodiments are only some embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
Taking the well mouth heat preservation and building heating of a coal mine in a severe cold area with the environmental temperature of-15 to-20 ℃ in winter as an example, the coal mine heat supply system taking mine exhaust air as a low-temperature heat source as shown in the figure mainly comprises a mine exhaust air duct 1, a heat exchange air duct 2 and an air source heat pump 3.
The heat exchange air duct 2 is horizontally installed on the mine ground, specifically, the heat exchange air duct 2 is a circular or square pipeline formed by welding steel plates, and the cross section of the pipeline is about 20 square meters. And a plurality of air outlets 7 are formed in the upper part of the pipe wall of the heat exchange air duct 2. Typically, the mine exhaust ducts 1 are arranged in pairs (2) one for each use and one for each backup. The mine exhaust duct 1 is connected to the side wall of the heat exchange air duct 2 through a flexible pipeline, so that vibration and noise are reduced. Meanwhile, the air exhaust duct can be switched to any mine air exhaust duct according to actual conditions, and exhausted air is introduced into the heat exchange air duct. The air source heat pump 3 for heating is arranged outside the heat exchange air channel 2, and the evaporator 4 of the air source heat pump 3 is arranged inside the heat exchange air channel 2 according to the design principle of 'strengthening convection heat exchange and reducing flow resistance' and performs convection heat exchange with the mine exhaust air.
In order to ensure that the exhaust air in the mine exhaust duct 1 enters the heat exchange duct 2 according to the required amount, a variable-frequency air adjusting fan 5 is arranged between the evaporator 4 and the air inlet end in the heat exchange duct 2, so that the smooth and sufficient amount of the exhaust air is ensured to enter the heat exchange duct, and the heat supply requirement of the system is met.
The mine exhaust air contains dust such as pulverized coal, and in order to prevent the evaporator from being blocked, which causes the increase of thermal resistance and flow resistance of the exhaust air heat exchange and the reduction of heat exchange quantity, an air filter 6 is arranged between the air adjusting fan 5 and the evaporator 4, and the dust removal rate is more than 98%. The exhaust air after heat release of the evaporator is exhausted to the atmosphere through an air outlet 7 at the upper part of the pipe wall of the heat exchange air duct 2, and no environmental pollution is caused.
Use the mine to air exhaust as the concrete working process of colliery heating system of low temperature heat source as follows:
and (3) introducing the mine exhaust air at the temperature of about 10-15 ℃ into a heat exchange air duct from a mine exhaust duct by a variable-frequency air conditioner according to actual demand, and introducing the mine exhaust air into an air source heat pump evaporator to release heat after dust is removed by a filter arranged for preventing the evaporator from blocking dust. The exhaust air with higher humidity not only releases sensible heat, but also releases latent heat of water vapor, and the heat release is large. By utilizing low-temperature heat extracted from exhaust air, the air source heat pump provides hot water of 60 ℃ for a coal mine, and returns water of 50 ℃, so that the heat supply requirement of the coal mine is met. Because the humidity of the exhaust air is high, after heat release, water is condensed out. If the exhaust air volume is 10000m for carrying out the downward cultivation/min, about 10t/day of condensed water is discharged through the heat exchange air duct every day, the condensed water is treated by the conventional process, and the method can be used as reclaimed water and is a good water resource. After the mine exhaust air is dedusted by a filter and is heated by an evaporator, the temperature is reduced to more than 4 ℃, and the mine exhaust air is exhausted from an air outlet of a heat exchange air duct. In the process, the surface of the evaporator is always in an environment with the temperature of more than 4 ℃, frosting is avoided, meanwhile, ash blockage is avoided, defrosting is avoided when the air source heat pump does not heat, the defect of heat supply is interrupted, and heat supply is stable.
In the embodiment, the air source heat pump is always in the optimal heating environment temperature zone above 4 ℃, and the energy efficiency ratio is about 2.5. Compared with an enthalpy-increasing air source heat pump with the energy efficiency ratio of less than 1.8 used in severe cold areas with the ambient temperature of-15 to-20 ℃, the energy efficiency ratio is improved by more than 35 percent. The coal mine heating system taking mine exhaust air as a low-temperature heat source is economical, stable and efficient in heat supply, has the functions of exhausting air and removing dust, protects the environment and is worthy of popularization.
Claims (4)
1. A coal mine heating system taking mine exhaust air as a low-temperature heat source is characterized by comprising a mine exhaust air duct (1), a heat exchange air duct (2) and an air source heat pump (3);
the heat exchange air duct (2) is horizontally arranged on the mine ground, and one end of the heat exchange air duct (2) is communicated with the mine exhaust duct (1);
the air source heat pump (3) is arranged outside the heat exchange air channel (2), and the evaporator (4) of the air source heat pump (3) is arranged inside the heat exchange air channel (2).
2. The coal mine heating system taking mine exhaust air as a low-temperature heat source according to claim 1, wherein a fan (5) is installed between an evaporator (4) and an air inlet end in the heat exchange air duct (2), and a plurality of air outlets (7) are formed in the upper portion of the pipe wall of the heat exchange air duct (2).
3. A coal mine heating system using mine exhaust air as a low-temperature heat source according to claim 2, wherein an air filter (6) is installed between the air conditioner (5) and the evaporator (4).
4. A coal mine heating system using mine exhaust air as a low-temperature heat source according to any one of claims 1 to 3, wherein the heat exchange air flue (2) is a square or round pipe welded by steel plates, and the cross section of the pipe is 15-25 square meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920841600.9U CN210153910U (en) | 2019-06-05 | 2019-06-05 | Coal mine heat supply system taking mine exhaust air as low-temperature heat source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920841600.9U CN210153910U (en) | 2019-06-05 | 2019-06-05 | Coal mine heat supply system taking mine exhaust air as low-temperature heat source |
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| Publication Number | Publication Date |
|---|---|
| CN210153910U true CN210153910U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920841600.9U Active CN210153910U (en) | 2019-06-05 | 2019-06-05 | Coal mine heat supply system taking mine exhaust air as low-temperature heat source |
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| Country | Link |
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| CN (1) | CN210153910U (en) |
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2019
- 2019-06-05 CN CN201920841600.9U patent/CN210153910U/en active Active
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