CN211739483U - Ultra-low temperature air source heat pump pit shaft air heating system - Google Patents
Ultra-low temperature air source heat pump pit shaft air heating system Download PDFInfo
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- CN211739483U CN211739483U CN202020305101.0U CN202020305101U CN211739483U CN 211739483 U CN211739483 U CN 211739483U CN 202020305101 U CN202020305101 U CN 202020305101U CN 211739483 U CN211739483 U CN 211739483U
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Abstract
The utility model relates to an ultra-low temperature air source heat pump pit shaft air heating system, which relates to an air heating device for coal mine safety production; the heat-insulation system comprises a plurality of ultralow temperature air source heat pump units and a heat-insulation main air pipe, wherein the ultralow temperature air source heat pump units are respectively connected with the heat-insulation main air pipe through heat-insulation branch air pipes, and the heat-insulation main air pipe is connected with a shaft; the ultralow temperature air source heat pump unit comprises a compressor, an evaporator, a condenser and a centrifugal fan, wherein the condenser is connected with an air inlet and is provided with a refrigerant circulating device, and the refrigerant circulating device is connected with the evaporator; the utility model directly heats all cold air required by shaft ventilation to 2 ℃ and then feeds the cold air into the shaft, thereby reducing heat exchange of a water system and heat loss of a pipeline in a conventional heating mode and having higher heating efficiency; under the condition that the shaft anti-freezing heat load is the same, the power consumption of the heating system is greatly reduced; the heating system can be assembled and installed at will according to the heating load of the shaft, and the construction period of the system is greatly shortened.
Description
Technical Field
The utility model relates to a colliery safety in production air heating device, concretely relates to ultra-low temperature air source heat pump pit shaft air heating system.
Background
In order to reduce the concentration of gas in a coal mine, prevent gas explosion and guarantee safe production of the coal mine, and create a good working environment for underground workers, underground air needs to be ventilated. When the temperature of the outdoor part of the northern area is lower than zero in winter, the phenomenon of icing at the air inlet part of a shaft can be caused, and the accidents of vehicle sliding and ice falling of vehicles for transporting personnel and equipment are easily caused. Therefore, the inlet air of the shaft needs to be heated in winter. Meanwhile, the lowest requirement of the temperature of air entering a shaft is 2 ℃, and the requirement of safe production of a coal mine cannot be met due to the extremely low temperature; as shown in fig. 1, the heating mode is a heating mode commonly used for preventing the shaft of the mine from freezing, namely, a coal-fired, gas-fired and oil-fired boiler heats cold water into high-temperature hot water with the temperature of more than 110 ℃, the high-temperature hot water is conveyed to a wellhead heating room by a water pump, then the outdoor cold air of a heating part is heated to 40 ℃, and then the high-temperature hot water is mixed with cold air to 2 ℃ and then is conveyed into the. With the increasing strictness of the environmental emission requirements, coal-fired boilers have been banned. The fuel and emission reduction cost of the gas and oil fired boiler is huge. Meanwhile, the phenomenon that the heat supply capacity is insufficient due to insufficient fuel supply often occurs in the gas-oil boiler. Air-source heat pump technology has now begun to be applied to wellbore air heating.
The conventional method for applying the air source heat pump technology to the shaft heating at present is as follows: the air source heat pump unit produces hot water with the temperature of more than 50 ℃ for heating part of outdoor cold air, and the heated hot air and the outdoor cold air are mixed to be 2 ℃ and then are sent into the shaft. However, under the condition of the extremely lowest temperature (below-25 ℃), because the temperature of the prepared hot water is higher (above 50 ℃), the energy efficiency ratio COP value of the air source heat pump unit is lower and is only about 1.2. And heat loss of pipelines along the way is added, so that the heating efficiency is close to that of an electric direct heating boiler. At the moment, a large amount of electric energy is consumed by heating the inlet air of the shaft by using the air source heat pump unit. The air source heat pump unit cannot exert the due energy-saving advantage, and simultaneously does not accord with the relevant industrial policy of the state.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides an ultra-low temperature air source heat pump pit shaft air heating system, solves the problem that there is the energy waste to the heating of mine pit shaft at present.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
An ultralow temperature air source heat pump shaft air heating system comprises a plurality of ultralow temperature air source heat pump units and a heat preservation main air pipe, wherein the ultralow temperature air source heat pump units are respectively connected with the heat preservation main air pipe through heat preservation branch air pipes, and the heat preservation main air pipe is connected with a shaft; the heat-preservation branch air pipe is provided with an electric shutoff butterfly valve; the ultralow temperature air source heat pump unit comprises a heating section and a heating fan section, the heating section comprises a compressor and an evaporator, the heating fan section comprises a condenser and a centrifugal fan, the condenser is connected with an air inlet, the condenser is provided with a refrigerant circulating device, and the refrigerant circulating device is connected with the evaporator.
Further, ultra-low temperature air source heat pump set be provided with explosion-proof fan, the heat preservation branch tuber pipe is provided with electronic fire prevention valve, electronic fire prevention valve is connected with explosion-proof fan for control explosion-proof fan power. The heat-insulating branch air pipe and the heat-insulating main air pipe are used for overcoming the pipeline resistance of the ultralow temperature air source heat pump unit and the heat-insulating branch air pipe and the heat-insulating main air pipe which correspond to the ultralow temperature air source heat pump unit.
Furthermore, the evaporator comprises evaporator fins, an evaporator fan and a liquid separation head, wherein the evaporator fins are connected with the liquid separation head, and the liquid separation head is connected with a refrigerant outlet of the condenser.
Furthermore, each shaft is connected with three groups of ultralow temperature air source heat pump units through heat insulation branch air pipes and heat insulation main air pipes.
Further, the compressor is a scroll compressor.
Further, the heating fan section is arranged in a box body, and the box body is a cabinet air conditioner box.
The utility model discloses produced beneficial effect does for prior art.
1. The utility model discloses abandon conventional air source heat pump technology heating methods, use ultra-low temperature air source heat pump set directly to send into in the pit shaft after 1:1 amount of wind heating to 2 ℃ with the required whole cold wind of pit shaft ventilation. The normal operation of the device is ensured even under the condition of the extremely lowest temperature (below-25 ℃), and the energy efficiency ratio COP value of the ultralow temperature air source heat pump unit can reach more than 3.0 due to the reduction of the heating temperature.
2. The utility model discloses no water system, system use in the 2 ℃ of ultra-low temperature air source heat pump set direct heating cold wind back sends into the pit shaft. The heat exchange and pipeline heat loss of a water system in a conventional heating mode are reduced, and the heating efficiency is higher. Under the condition that the freeze-proof heat load of the shaft is the same, the power consumption of the heating system is greatly reduced. The heating system is simpler, and devices such as a circulating pump of the water system are reduced.
3. The utility model discloses ultra-low temperature air source heat pump set is the unit module ization design, and every ultra-low temperature air source heat pump set only is responsible for heating part cold wind. The warm air heated by the units is pressurized by the fans of the units and then flows into the main air duct to be conveyed to the shaft. The ultralow temperature air source heat pump units can be assembled and installed at will according to the heating load of the shaft, and the construction period of the system is greatly shortened.
Drawings
FIG. 1 is a schematic diagram of a conventional heating method for preventing freeze in a mine shaft.
Fig. 2 is a schematic structural diagram of a shaft air heating system according to an embodiment of the present invention.
Fig. 3 is the utility model discloses an ultra-low temperature air source heat pump set schematic structure.
Fig. 4 is a schematic diagram of the reverse carnot cycle.
Wherein, 1 is an ultralow temperature air source heat pump unit, and 2 is a heat preservation main air pipe; 3 is a heat preservation branch air pipe; 4 is a shaft; 5 is an electric shutoff butterfly valve, 6 is an electric fireproof valve, 100 is a heating section, 101 is a compressor, 102 is an evaporator, 103 is an evaporator fan, 104 is a liquid separation head, 201 is a condenser, 202 is an air inlet, 203 is a high-air-volume centrifugal fan, and 204 is a cabinet air conditioner box body.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.
As shown in fig. 2, the ultra-low temperature air source heat pump shaft air heating system comprises three ultra-low temperature air source heat pump units 1 and a heat preservation main air pipe 2, wherein the ultra-low temperature air source heat pump units 1 are provided with explosion-proof fans, the ultra-low temperature air source heat pump units 1 are respectively connected with the heat preservation main air pipe 2 through heat preservation branch air pipes 3, and the heat preservation main air pipe 2 is connected with a shaft 4; the heat preservation branch air pipe 3 is provided with an electric shutoff butterfly valve 5 at 70 ℃ and an electric fireproof valve 6 at 70 ℃; the electric fire-proof valve 6 is linked with the explosion-proof fan of the corresponding ultralow-temperature air source heat pump unit 1, and the power supply of the explosion-proof fan is cut off when the electric fire-proof valve 6 is closed when a fire disaster occurs, so that the fire disaster is prevented from spreading. And in non-heating seasons, the electric shutoff butterfly valve 5 in the heat-insulating branch air pipe 3 is closed, so that outdoor fresh air is ensured to directly enter the shaft 4 from a wellhead without passing through the unit 1.
As shown in fig. 3, the ultra-low temperature air source heat pump unit 1 includes a heating section 100 and a heating fan section, and the heating fan section is disposed in a cabinet air conditioner box 204. The heating section 100 comprises a scroll compressor 101 and an evaporator, the evaporator comprises evaporator fins 102, an evaporator fan 103 and a liquid separation head 104, and the evaporator fins 102 are connected with the liquid separation head 104; the heating fan section comprises a condenser 201 and a large-air-volume centrifugal fan 203, and the condenser 201 heats cold air coming from an air inlet 202. Firstly, the liquid of the refrigerant R134a enters the evaporator fins 102 through the liquid separation head 104, the refrigerant becomes low-pressure low-temperature gas after absorbing the heat of the air, the low-pressure low-temperature gas enters the compressor 101, the compressed high-temperature high-pressure gas enters the condenser 201 to release heat and become liquid, and then the liquid enters the liquid separation head 104 for circulation. After being heated by the condenser 201, the outdoor air sucked in through the air inlet 202 is sent into the shaft 4 through the heat-preservation branch air pipe 3 and the heat-preservation main air pipe 2 by the large-air-volume centrifugal fan 203.
The unit directly heats outdoor cold air to 2 ℃ required by shaft anti-freezing, a plurality of special units for shaft mouth anti-freezing can be combined in a modularization mode according to the air intake required by mine ventilation, and all fresh air is fed into the shaft according to the air volume of 1:1 so as to ventilate the shaft in winter and meet the requirement of shaft anti-freezing. In coal systems, this 1:1 air flow supply has never been used in previous mine air supplies.
The device abandons the heating mode of the conventional air source heat pump technology, directly heats all cold air required by shaft ventilation to 2 ℃ and then sends the cold air into the shaft, and reduces the temperature of a heated medium (condensation).
According to the reverse Carnot cycle principle, see FIG. 4, where T1Is the temperature T of high-temperature heat source2Is the low temperature heat source temperature q1Is the heat absorption capacity, q2Is the heat release amount, w0And acts for the heat pump.
T1So that w is decreased0And decreases. The energy efficiency value calculation formula of the heat pump is as follows: h = T1/(T1-T2)
(T1-T2) The smaller the difference value is, the larger the h value is, and the higher the energy efficiency of the heat pump is. Therefore, even under the condition of extreme lowest temperature of the unit (below-25 ℃), the energy efficiency ratio COP value of the unit special for wellhead anti-freezing is still higher and can reach more than 3.0.
The device adopts full fresh air supply, reduces the air supply temperature, and simultaneously avoids the poor shaft anti-freezing effect caused by uneven mixed air supply by using the full fresh air supply. The heating system water-free system directly heats outdoor cold air to 2 ℃ by using the special wellhead anti-freezing unit and then sends the outdoor cold air into the shaft, so that the heat exchange and pipeline heat loss of a water system in an ordinary air source heat pump shaft anti-freezing heating mode are reduced, the heating efficiency is higher, the heating system is simpler, and devices such as a circulating pump are reduced.
The special units for preventing the well mouth from freezing are all in unit modular design, and each unit is only responsible for heating part cold air. The warm air heated by the units is pressurized by the fans of the units and then flows into the main air duct to be conveyed to the shaft. The special wellhead anti-freezing unit set can be randomly combined and installed according to the anti-freezing load of the shaft, so that the construction period of the system is greatly shortened, and the heat preservation requirement of the shaft in different construction periods of the mine is better met.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (6)
1. An ultralow temperature air source heat pump shaft air heating system is characterized by comprising a plurality of ultralow temperature air source heat pump units (1) and a heat preservation main air pipe (2), wherein the ultralow temperature air source heat pump units (1) are respectively connected with the heat preservation main air pipe (2) through heat preservation branch air pipes (3), and the heat preservation main air pipe (2) is connected with a shaft (4); the heat-preservation branch air pipe (3) is provided with an electric shutoff butterfly valve (5); ultralow temperature air source heat pump set (1) is including heating section (100) and heating fan section, heating section (100) are including compressor (101) and evaporimeter, and the heating fan section includes condenser (201) and centrifugal fan, condenser (201) are connected with air intake (202), and condenser (201) are provided with refrigerant circulating device, and refrigerant liquid circulating device is connected with the evaporimeter.
2. The ultra-low temperature air source heat pump shaft air heating system as claimed in claim 1, wherein the ultra-low temperature air source heat pump unit (1) is provided with an explosion-proof fan, the heat preservation branch air pipe (3) is provided with an electric fire valve (6), and the electric fire valve (6) is connected with the explosion-proof fan and used for controlling the power supply of the explosion-proof fan.
3. An ultra-low temperature air source heat pump wellbore air heating system according to claim 1, wherein the evaporator comprises evaporator fins (102), an evaporator fan (103) and a liquid separation head (104), the evaporator fins (102) are connected with the liquid separation head (104), and the liquid separation head (104) is connected with a refrigerant outlet of the condenser (201).
4. The ultra-low temperature air source heat pump shaft air heating system is characterized in that three groups of ultra-low temperature air source heat pump units (1) are connected to each shaft (4) through the heat-insulating branch air pipes (3) and the heat-insulating main air pipe (2).
5. An ultra-low temperature air-source heat pump well bore air heating system as claimed in claim 1, wherein the compressor (101) is a scroll compressor.
6. The ultra-low temperature air source heat pump wellbore air heating system of claim 1, wherein the heating fan section (200) is disposed in a cabinet air conditioning cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020305101.0U CN211739483U (en) | 2020-03-12 | 2020-03-12 | Ultra-low temperature air source heat pump pit shaft air heating system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020305101.0U CN211739483U (en) | 2020-03-12 | 2020-03-12 | Ultra-low temperature air source heat pump pit shaft air heating system |
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| CN211739483U true CN211739483U (en) | 2020-10-23 |
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| CN202020305101.0U Active CN211739483U (en) | 2020-03-12 | 2020-03-12 | Ultra-low temperature air source heat pump pit shaft air heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670016A (en) * | 2021-07-28 | 2021-11-19 | 石爽 | Air source high-temperature heat pump machine for belt dryer |
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2020
- 2020-03-12 CN CN202020305101.0U patent/CN211739483U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670016A (en) * | 2021-07-28 | 2021-11-19 | 石爽 | Air source high-temperature heat pump machine for belt dryer |
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