CN211823266U - Heat pump direct heating type split shaft anti-freezing system based on return air preheating - Google Patents
Heat pump direct heating type split shaft anti-freezing system based on return air preheating Download PDFInfo
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- CN211823266U CN211823266U CN202020116585.4U CN202020116585U CN211823266U CN 211823266 U CN211823266 U CN 211823266U CN 202020116585 U CN202020116585 U CN 202020116585U CN 211823266 U CN211823266 U CN 211823266U
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Abstract
The utility model belongs to the technical field of colliery heating and ventilation, concretely relates to split type pit shaft anti-freezing system of heat pump direct heating type based on return air preheats, it has solved the problem that traditional technique adopted the electricity to assist the heat to preheat the new trend and lead to the working costs high, need electric explosion-proof facility. The utility model comprises a wellhead heater, a hot air unit, a main fan machine room and a return air heating room; the main fan machine room is positioned at the mouth of the return air shaft and is communicated with the return air heat taking chamber, and the return air heat taking chamber is provided with a return air heat taking device; the return air heat-taking device comprises a return air heat exchanger and an external fresh air preheater; the return air heat exchanger is communicated with the fresh air preheater through a secondary refrigerant water supply pipe and a secondary refrigerant water return pipe, and a secondary refrigerant circulating pump is arranged on the secondary refrigerant water return pipe; the fresh air preheater is arranged outside the wellhead heater. The utility model adopts the return air to preheat the fresh air, thereby saving more energy, having high system operation energy efficiency and low operation cost; explosion-proof facilities are not needed, safety and reliability are achieved, and cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of colliery heating and ventilation, concretely relates to split type pit shaft anti-freezing system of heat pump direct heating type based on return air preheats.
Background
When the existing shaft anti-freezing system for the coal mine is applied to mine air return, drainage and low-grade heat energy of process cooling water, a heat pump unit is required to recover heat to prepare high-temperature hot water for shaft anti-freezing, so that the problem of high initial investment cost is solved, when part of the coal mine is used, the coal is saved, energy is not saved, the problems that the clean energy is adopted for replacing the coal are solved, the energy-saving economic benefit is not obvious, the popularization difficulty is high and the like are solved; when the far infrared electric heating furnace, the electric heating furnace or the electromagnetic hot blast stove is applied, the power consumption is large, the capacity increase is often required to be simultaneously matched with electric power, the operation cost is high, the economical efficiency is poor, and the operation cost pressure is caused for coal mines.
The well head heater is arranged on the well head of the blast well in the traditional technology, the hot air unit is arranged in the open space far away from the well head, and the electric auxiliary heat is adopted to preheat the fresh air and then the heat pump is adopted to heat the fresh air for preventing the shaft from freezing. The electric auxiliary heat is used as a preheating means of cold air, but the electric explosion-proof problem needs to be solved when the distance between a wellhead heater and an air inlet wellhead is less than 20 m, so that the safety is reduced, and the engineering cost is higher; and when adopting electricity to assist the heat as the preheating means of cold air, there is the higher problem of system's operating cost.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the problem that the conventional art adopted the electricity to assist the heat to preheat the new trend and lead to the working costs height, need electric explosion-proof facility, provide a heat pump direct heating type split type pit shaft anti-freezing system based on return air preheats.
The utility model discloses a following technical scheme realizes: a heat pump direct heating type split shaft anti-freezing system based on return air preheating comprises a wellhead heater and a hot air unit, wherein the wellhead heater is positioned at the wellhead of an air supply well, and the hot air unit and the wellhead heater are positioned at two places;
the hot air unit comprises a heat pump, and the heat pump comprises a compressor, an external condenser, an expansion valve and an evaporator; an axial flow fan is arranged at the end of the evaporator, and an explosion-proof fan is arranged beside the condenser;
one end of the wellhead heater is provided with a fresh air inlet, the other end of the wellhead heater is provided with an air supply outlet, and an external condenser of a hot air unit and an explosion-proof fan arranged beside the condenser are sequentially arranged in the wellhead heater from the fresh air inlet to the air supply outlet;
the evaporator of the hot air unit is communicated with a condenser which is arranged outside the hot air unit and is positioned in the wellhead heater through a refrigerant air pipe and a refrigerant liquid pipe;
the air conditioner also comprises a main fan machine room and a return air heating room;
one end of the main fan machine room is positioned at the mouth of the return air shaft, the other end of the main fan machine room is communicated with one end of the return air heating chamber, and the other end of the return air heating chamber is provided with a return air heating device;
a return air main fan used for sending return air into the return air heating chamber is arranged in the main fan machine room;
the return air heat-taking device comprises a return air heat exchanger and an external fresh air preheater for preheating fresh air;
the return air heat exchanger is communicated with the fresh air preheater through a secondary refrigerant water supply pipe and a secondary refrigerant water return pipe, and a secondary refrigerant circulating pump for secondary refrigerant circulation is arranged on the secondary refrigerant water return pipe;
the fresh air preheater is arranged in the wellhead heater externally and is positioned between a fresh air inlet of the wellhead heater and a condenser externally arranged on a hot air unit in the wellhead heater.
Further, the heat pump of the hot air unit is an air source heat pump.
Furthermore, the heat pump of the hot air unit is a plurality of air source heat pumps, and the plurality of air source heat pumps are sequentially arranged at the top of the base.
Furthermore, the number of return air heat exchangers of the return air heat-taking device is multiple.
Furthermore, one side of the wellhead heater is provided with an access door for maintenance.
Furthermore, the hot air unit is arranged in an outdoor air ground far away from a wellhead, and the wellhead heater is arranged in an air heating chamber on one side of the wellhead of the blast well.
The utility model discloses compare prior art's beneficial effect:
1. the utility model avoids that when the quantity of air source heat pump devices placed near the well mouth is large, the local temperature is easy to cause low, the low-temperature fresh air is easy to be directly absorbed into the air inlet or the well mouth of the condenser, the heating load of the heat pump is increased, the power consumption of the device is large, the operation efficiency and reliability of the device are reduced, and the defrosting difficulty of the heat pump set is increased; the fresh air is directly conveyed to the wellhead after being heated by the wellhead heater positioned at the wellhead of the blast well, a conveying pipeline is not required to be installed, the heat energy loss is reduced, the energy is saved, the comprehensive operation energy efficiency of a wellhead heating unit is improved, and the operation cost is low;
2. the utility model discloses make full use of the heat of return air in the mine return air shaft, utilize the mine return air to pass through the means of heat transfer, preheat the new trend, utilize the air source heat pump to pass through the vapor compression circulation system of heat pump with the heat in the air simultaneously, the outdoor air that directly heats through preheating is used for the pit shaft to prevent frostbite, and is more energy-conserving, need not explosion-proof facility, safe and reliable, reduce cost;
3. the utility model organically combines the heat pump with the prior shaft anti-freezing technology, effectively utilizes the mine return air and the low-grade heat source in the air, has simple and reliable system operation, can realize energy conservation and emission reduction of the coal mine, and saves the operation cost;
4. in addition, the utility model can calculate the anti-freezing heat load of the shaft in real time according to the change of the outdoor environment temperature, selectively put in different quantities of air source heat pumps and return air heat-taking devices, can reduce the operation cost and has good practicability; meanwhile, as the refrigerant and the secondary refrigerant solution with a low freezing point are adopted as the media for energy transmission, the system is reliable in operation, the risk of freezing does not exist, and the risk of frost cracking of the heat exchanger in the wellhead heater caused by low water supply temperature in the replacement process of other clean energy sources can be avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1-hot air unit, 1.1-condenser, 1.2-axial flow fan
2-wellhead heater, 2.1-fresh air inlet and 2.2-air supply outlet
3-return air heat-taking device, 3.1-return air heat exchanger, 3.2-fresh air preheater and 3.3-secondary refrigerant circulating pump
4-main fan machine room, 4.1-return air main fan
5-Return air heat-taking chamber
6-refrigerant liquid pipe
7-refrigerant gas pipe
8-access door
9-explosion-proof fan
10-blast well
11-air return shaft
12-coolant water supply pipe
13-secondary refrigerant return pipe
14-base.
Detailed Description
The embodiments of the present invention will be further explained with reference to the accompanying drawings:
it should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, the utility model provides a heat pump direct heating type split type shaft anti-freezing system based on return air preheating, which comprises a wellhead heater 2 positioned at the wellhead of a blast well 10 and a hot air unit 1 positioned at two places with the wellhead heater 2;
the hot air unit 1 comprises a heat pump, and the heat pump comprises a compressor, an external condenser 1.1, an expansion valve and an evaporator; an axial flow fan 1.2 is arranged at the evaporator end, and an explosion-proof fan 9 is arranged beside the condenser 1.1;
one end of the wellhead heater 2 is provided with a fresh air inlet 2.1, the other end of the wellhead heater is provided with an air supply outlet 2.2, and an external condenser 1.1 of a hot air unit 1 and an explosion-proof fan 9 arranged at the side of the condenser 1.1 are sequentially arranged in the wellhead heater 2 from the fresh air inlet 2.1 to the air supply outlet 2.2;
an evaporator of the hot air unit 1 is communicated with a condenser 1.1 which is positioned outside the hot air unit in the wellhead heater 2 through a refrigerant air pipe 7 and a refrigerant liquid pipe 6;
the air conditioner also comprises a main fan machine room 4 and a return air heating room 5;
one end of the main fan machine room 4 is positioned at the wellhead of the return air shaft 11, the other end of the main fan machine room 4 is communicated with one end of the return air heating chamber 5, and the other end of the return air heating chamber 5 is provided with a return air heating device 3;
a return air main fan 4.1 for sending return air into the return air heating chamber 5 is arranged in the main fan machine room 4, and the return air is sent into the return air heating chamber 5 by the main fan 4.1 and then discharged;
the return air heat-taking device 3 comprises a return air heat exchanger 3.1 and an external fresh air preheater 3.2 for preheating fresh air;
the return air heat exchanger 3.1 is communicated with the fresh air preheater 3.2 through a secondary refrigerant water supply pipe 12 and a secondary refrigerant water return pipe 13, and a secondary refrigerant circulating pump 3.3 for secondary refrigerant circulation is arranged on the secondary refrigerant water return pipe 13;
the fresh air preheater 3.2 is arranged in the wellhead heater 2, and the fresh air preheater 3.2 is positioned between a fresh air inlet 2.1 of the wellhead heater 2 and a condenser 1.1 arranged outside the hot air unit 1 in the wellhead heater 2.
The heat pump of the hot air unit 1 is an air source heat pump.
The heat pumps of the hot air unit 1 are a plurality of air source heat pumps, the plurality of air source heat pumps are sequentially arranged on the top of the base 14, and the heat load required for preventing the shaft from freezing can be changed according to the change of the outdoor air temperature, so that the number of the heat pumps which are put into operation can be selected according to the change of the heat load.
The number of return air heat exchangers 3.1 of the return air heat recovery device 3 is plural, and since the heat load required for preventing freezing of the shaft changes according to the change of the outdoor air temperature, the number of return air heat recovery devices 3 to be put into use for preheating can be selected according to the change of the heat load.
And an access door 8 for overhauling is arranged on one side of the wellhead heater 2, so that the wellhead heater 2 can be conveniently overhauled.
Hot-blast unit 1 sets up in the outdoor open ground of keeping away from the well head, well head heater 2 sets up in the air heating room of 10 well head one sides of blast well, prevention hot-blast unit 1 all sets up when the well head with well head heater 2, because the equipment that sets up is when more, easily cause local temperature low, easily with microthermal new trend direct absorption condenser's air intake, the heating load of heat pump has been increased, it is big to cause equipment power consumption, the reliability of equipment operation has been reduced, the degree of difficulty of heat pump set defrosting has been increased.
The utility model discloses a theory of operation:
the hot air unit 1 of the utility model is installed in the outdoor open ground far away from the wellhead of the blast well 10, under the action of the axial flow fan 1.2, the evaporator of the hot air unit 1 can fully utilize the low-grade heat energy in the air, compress the refrigerant into the high-temperature and high-pressure refrigerant through the steam compression circulating system of the hot air unit 1, and then send the refrigerant into the condenser 1.1 of the hot air unit 1 in the wellhead heater 2 through the pipeline;
fresh air enters a wellhead heater 2 through a fresh air inlet 2.1, is preheated by a fresh air preheater 3.2, is reheated by an external condenser 1.1 of a hot air unit 1, is sent to a wellhead of an air supply well 10 through an air supply outlet 2.2 under the action of an explosion-proof fan 9, and is mixed with the fresh air from the wellhead, so that the inlet air temperature is ensured to be higher than 2 ℃, and the requirement of shaft freeze prevention is met;
the utility model absorbs the heat of the return air in the return air shaft 11 through the return air heat-taking device 3 arranged in the return air heat-taking chamber 5 near the return air shaft 11, and is used for preheating the fresh air entering the wellhead heater 2, thereby reducing the heating load of the wellhead heater 2 and being beneficial to further energy conservation of a wellhead anti-freezing system;
preheating principle:
the return air of the return air shaft 11 is sent into the return air heating chamber 5 by the return air main fan 4.1 positioned in the main fan machine room 4, the secondary refrigerant solution of the return air heat exchanger 3.1 of the return air heating device 3 positioned at one end of the return air heating chamber 5 absorbs the heat in the return air, the heat is conveyed into the fresh air preheater 3.2 through the secondary refrigerant water supply pipe 12 and is used for preheating the fresh air entering the wellhead heater 2, and then the fresh air enters the return air heat exchanger 3.1 again through the secondary refrigerant water return pipe 13 to absorb the heat in the return air under the action of the secondary refrigerant circulating pump 3.3, and the operation is repeated in this way.
The utility model discloses an useful part.
1. The utility model avoids that when the quantity of air source heat pump devices placed near the well mouth is large, the local temperature is easy to cause low, the low-temperature fresh air is easy to be directly absorbed into the air inlet or the well mouth of the condenser, the heating load of the heat pump is increased, the power consumption of the device is large, the operation efficiency and reliability of the device are reduced, and the defrosting difficulty of the heat pump set is increased; the fresh air is directly conveyed to the wellhead after being heated by the wellhead heater positioned at the wellhead of the blast well, a conveying pipeline is not required to be installed, the heat energy loss is reduced, the energy is saved, the comprehensive operation energy efficiency of a wellhead heating unit is improved, and the operation cost is low;
2. the utility model discloses make full use of the heat of return air in the mine return air shaft, utilize the mine return air to pass through the means of heat transfer, preheat the new trend, utilize the air source heat pump to pass through the vapor compression circulation system of heat pump with the heat in the air simultaneously, the outdoor air that directly heats through preheating is used for the pit shaft to prevent frostbite, and is more energy-conserving, need not explosion-proof facility, safe and reliable, reduce cost;
3. the utility model organically combines the heat pump with the prior shaft anti-freezing technology, effectively utilizes the mine return air and the low-grade heat source in the air, has simple and reliable system operation, can realize energy conservation and emission reduction of the coal mine, and saves the operation cost;
4. in addition, the utility model can calculate the anti-freezing heat load of the shaft in real time according to the change of the outdoor environment temperature, selectively put in different quantities of air source heat pumps and return air heat-taking devices, can reduce the operation cost and has good practicability; meanwhile, as the refrigerant and the secondary refrigerant solution with a low freezing point are adopted as the media for energy transmission, the system is reliable in operation, the risk of freezing does not exist, and the risk of frost cracking of the heat exchanger in the wellhead heater caused by low water supply temperature in the replacement process of other clean energy sources can be avoided.
Claims (6)
1. A heat pump direct heating type split shaft anti-freezing system based on return air preheating comprises a wellhead heater (2) positioned at the wellhead of an air supply shaft (10) and hot air units (1) positioned at two places together with the wellhead heater (2);
the hot air unit (1) comprises a heat pump, and the heat pump comprises a compressor, an external condenser (1.1), an expansion valve and an evaporator; an axial flow fan (1.2) is arranged at the evaporator end, and an explosion-proof fan (9) is arranged beside the condenser (1.1);
one end of the wellhead heater (2) is provided with a fresh air inlet (2.1), the other end of the wellhead heater is provided with an air supply outlet (2.2), and an external condenser (1.1) of the hot air unit (1) and an explosion-proof fan (9) arranged beside the condenser (1.1) are sequentially arranged in the wellhead heater (2) from the fresh air inlet (2.1) to the air supply outlet (2.2);
an evaporator of the hot air unit (1) is communicated with a condenser (1.1) which is arranged outside the hot air unit (1) and is positioned in the wellhead heater (2) through a refrigerant air pipe (7) and a refrigerant liquid pipe (6); the method is characterized in that:
the air conditioner also comprises a main fan machine room (4) and an air return heat-taking chamber (5);
one end of the main fan machine room (4) is positioned at the wellhead of the return air shaft (11), the other end of the main fan machine room (4) is communicated with one end of the return air heat-taking chamber (5), and the other end of the return air heat-taking chamber (5) is provided with a return air heat-taking device (3);
a return air main fan (4.1) used for sending return air into the return air heat-taking chamber (5) is arranged in the main fan machine room (4);
the return air heat-taking device (3) comprises a return air heat exchanger (3.1) and an external fresh air preheater (3.2) for preheating fresh air;
the return air heat exchanger (3.1) is communicated with the fresh air preheater (3.2) through a secondary refrigerant water supply pipe (12) and a secondary refrigerant water return pipe (13), and the secondary refrigerant water return pipe (13) is provided with a secondary refrigerant circulating pump (3.3) for circulating secondary refrigerant;
the fresh air preheater (3.2) is arranged in the wellhead heater (2) externally, and the fresh air preheater (3.2) is positioned between a fresh air inlet (2.1) of the wellhead heater (2) and a condenser (1.1) arranged outside a hot air unit (1) in the wellhead heater (2).
2. The heat pump direct heating type split shaft anti-freezing system based on return air preheating as claimed in claim 1, wherein: the heat pump of the hot air unit (1) is an air source heat pump.
3. The heat pump direct heating type split shaft anti-freezing system based on return air preheating as claimed in claim 2, wherein: the heat pump of the hot air unit (1) is a plurality of air source heat pumps which are sequentially arranged on the top of the base (14).
4. The heat pump direct heating type split shaft anti-freezing system based on return air preheating according to any one of claims 1 to 3, characterized in that: the number of the return air heat exchangers (3.1) of the return air heat-taking device (3) is multiple.
5. The heat pump direct heating type split shaft anti-freezing system based on return air preheating as claimed in claim 4, wherein: and an access door (8) for overhauling is arranged on one side of the wellhead heater (2).
6. The heat pump direct heating type split shaft anti-freezing system based on return air preheating as claimed in claim 5, wherein: the hot air unit (1) is arranged in an outdoor air ground far away from a wellhead, and the wellhead heater (2) is arranged in an air heating chamber on one side of the wellhead of the blast well (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116585.4U CN211823266U (en) | 2020-01-19 | 2020-01-19 | Heat pump direct heating type split shaft anti-freezing system based on return air preheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020116585.4U CN211823266U (en) | 2020-01-19 | 2020-01-19 | Heat pump direct heating type split shaft anti-freezing system based on return air preheating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211823266U true CN211823266U (en) | 2020-10-30 |
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ID=72990597
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020116585.4U Active CN211823266U (en) | 2020-01-19 | 2020-01-19 | Heat pump direct heating type split shaft anti-freezing system based on return air preheating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211823266U (en) |
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2020
- 2020-01-19 CN CN202020116585.4U patent/CN211823266U/en active Active
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