CN210343404U - Coal mining cooling system with high-pressure secondary cooling water heat exchange - Google Patents
Coal mining cooling system with high-pressure secondary cooling water heat exchange Download PDFInfo
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- CN210343404U CN210343404U CN201921289385.2U CN201921289385U CN210343404U CN 210343404 U CN210343404 U CN 210343404U CN 201921289385 U CN201921289385 U CN 201921289385U CN 210343404 U CN210343404 U CN 210343404U
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Abstract
The utility model discloses a coal mining cooling system with high pressure secondary cooling water heat transfer, including refrigeration cycle, primary cooling water circulation, high pressure secondary cooling water circulation and refrigerated water circulation of refrigerating unit. And (3) isolating the secondary cooling water in a high-pressure state from the primary cooling water in a low-pressure state by using the high-pressure heat exchanger. The primary cooling water and the chilled water which directly enter the refrigerating unit for heat exchange belong to low-pressure states, and the safe operation of the refrigerating unit is ensured. The heat released by the condenser of the refrigerating unit is finally sent to a cooling tower on the ground to be discharged through secondary cooling water in a high-pressure state. The coal mining temperature reduction is achieved, and meanwhile, the underground operation and the safe operation of the whole coal mining mine are ensured. The refrigerating unit has good heat exchange effect, small heat exchange area and small unit volume, and is convenient for underground disassembly and assembly and movement; and moreover, the refrigeration coefficient is high, the power consumption is low, and the energy-saving effect is good.
Description
Technical Field
The invention belongs to the technical field of refrigeration and air conditioning, and particularly relates to a coal mining cooling system with good heat exchange effect and high refrigeration coefficient and high heat exchange of high-pressure secondary cooling water.
Background
Along with the gradual completion of the mining of surface coal and near-surface coal, the mining depth of the coal mining mine becomes deeper and deeper. Due to the fact that the ground temperature rises along with the increase of the depth of the mine and the heat release effect of other heat sources (such as air compression, oxidation process and mechanical equipment work) and the like, coal mining mines threatened by high temperature are increased day by day. In such a high-temperature environment, underground workers engage in heavy physical labor, are difficult in body heat dissipation, and are prone to symptoms such as sunstroke collapse, excessive sweating, thermal vertigo and central nervous system disorder, so that the body function slides down. The high temperature of the mine not only affects the physical health of workers, but also is a hazard to the safe production of the mine, such as mechanical equipment for working on a working face and the like. Therefore, coal mining and cooling become important work for safety production under high-temperature coal mining mines, and a refrigerating unit refrigerating and cooling method is widely used.
Due to the pressure limit that the refrigerating unit can bear, the underground refrigerating unit cooling system for the coal mine is provided at a certain depth, and cooling water cannot be sent to a cooling tower on the ground for heat exchange. Therefore, the existing coal mining cooling unit basically discharges the heat released by the condenser to other places of a coal mining mine underground ventilation system, such as a return airway, and then discharges the heat to the atmosphere through a ground ventilator arranged at the outlet of a main return airway. The ventilation system under the coal mine directly influences the safety production of the whole coal mine. The heat removal mode can increase the risk of safety accidents under the coal mine, such as explosion accidents caused by the increase of dryness of coal dust; the temperature is increased, so that the fault of the ventilator affects the safe operation of the whole mine; moreover, if a gas outburst accident occurs, the underground explosion accident is particularly easy to occur.
In order to solve the problems, the existing coal mining refrigerating unit cooling method needs to be improved, and a coal mining cooling system with good heat exchange effect, high refrigeration coefficient and high heat exchange of high-pressure secondary cooling water is provided.
Disclosure of Invention
The invention aims to provide a coal mining cooling system with high-pressure secondary cooling water heat exchange, which can ensure that a refrigerating unit is in a low-pressure operation state and the safe operation of the refrigerating unit is ensured; and the heat released by the condenser of the refrigerating unit can be sent to a cooling tower on the ground for discharging, thereby ensuring the safe operation of the underground operation and the whole coal mining mine.
In order to achieve the purpose, the invention adopts the following technical scheme.
The coal mining cooling system with high-pressure secondary cooling water heat exchange comprises a refrigeration cycle, a primary cooling water cycle, a high-pressure secondary cooling water cycle and a chilled water cycle of a refrigerating unit. The refrigerating unit is a water-cooled water chilling unit, has good heat exchange effect, small heat exchange area and small unit volume, and is convenient for underground disassembly and assembly and movement; and moreover, the refrigeration coefficient is high, the power consumption is low, and the energy-saving effect is good.
The refrigerating cycle of the refrigerating unit comprises a compressor, a condenser, an expansion valve and an evaporator, and the cycle belongs to a low-pressure operation working condition.
The primary cooling water circulation comprises a primary cooling water pump, a condenser, a high-pressure heat exchanger and a primary cooling water filter, and the circulation belongs to a low-pressure operation working condition.
The high-pressure secondary cooling water circulation comprises a secondary cooling water pump, a high-pressure heat exchanger, a cooling tower and a secondary cooling water filter, and the circulation belongs to a high-pressure operation working condition.
The chilled water circulation comprises a chilled water pump, an air conditioner tail end, a chilled water filter and an evaporator, and belongs to a low-pressure operation working condition.
The invention uses the high-pressure heat exchanger belonging to the shell-and-tube type to isolate the secondary cooling water in a high-pressure state from the primary cooling water in a low-pressure state, wherein the secondary cooling water flows through the tube side, and the primary cooling water flows through the shell side. The primary cooling water and the chilled water which directly enter the refrigerating unit for heat exchange belong to low-pressure states, and the safe operation of the refrigerating unit is ensured. Heat released by a condenser of the refrigerating unit is subjected to heat exchange by primary cooling water and secondary cooling water in sequence, and finally the secondary cooling water is sent to a cooling tower on the ground for discharging, rather than the heat is discharged to the underground of a coal mine. The coal mining temperature reduction is achieved, and meanwhile, the underground operation and the safe operation of the whole coal mining mine are ensured.
Other advantages, objects, and features of the invention will be apparent from the description which follows.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the coal mining cooling system with high-pressure secondary cooling water heat exchange.
FIG. 2 is a partial structural schematic diagram of the coal mining cooling system with high-pressure secondary cooling water heat exchange.
Reference numerals indicate the same.
1-a refrigeration unit; 2-a compressor; 3-a condenser; 4 an expansion valve; 5-an evaporator; 6-primary cooling water pump; 7-a high pressure heat exchanger; 8-primary cooling water filter; 9-secondary cooling water pump; 10-a cooling tower; 11-secondary cooling water filter; 12-a chilled water pump; 13-air conditioning terminal; 14-a chilled water filter; 15-air conditioning cold air; 16-a working surface; 71-high pressure heat exchange tube; 72-high pressure tube sheet; 73 a-a secondary cooling water inlet pipe box; 73 b-a secondary cooling water outlet pipe box; 74 a-a secondary cooling water inlet; 74 b-a secondary cooling water outlet; 75 a-a primary cooling water inlet; 75 b-a primary cooling water outlet; 76-a baffle plate; 77-shell.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The preferred embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
In an embodiment, referring to fig. 1 and 2, a coal mining cooling system with high-pressure secondary cooling water heat exchange includes: the refrigerating cycle, the primary cooling water cycle, the high-pressure secondary cooling water cycle and the chilled water cycle of the refrigerating unit.
Specifically, the refrigeration cycle of the refrigeration unit 1 includes a compressor 2, a condenser 3, an expansion valve 4, and an evaporator 5; the primary cooling water circulation comprises a primary cooling water pump 6, a condenser 3, a high-pressure heat exchanger 7 and a primary cooling water filter 8; the high-pressure secondary cooling water circulation comprises a secondary cooling water pump 9, a high-pressure heat exchanger 7, a cooling tower 10 and a secondary cooling water filter 11; the chilled water circulation includes a chilled water pump 12, an air conditioner terminal 13, a chilled water filter 14, and an evaporator 5. The heat released by the condenser 3 in the refrigeration process is subjected to heat exchange by primary cooling water and secondary cooling water in sequence, and is finally discharged through a cooling tower 10 on the ground instead of being discharged to the underground of a coal mine; the coal mining temperature reduction is achieved, and meanwhile, the underground operation and the safe operation of the whole coal mining mine are ensured.
In the embodiment, the refrigerating unit 1 is a water-cooled water chilling unit, has good heat exchange effect, small heat exchange area and small unit volume, and is convenient for underground disassembly and assembly and movement; and moreover, the refrigeration coefficient is high, the power consumption is low, and the energy-saving effect is good. In operation, in the refrigeration cycle of the refrigeration unit 1, the compressor 2 compresses a gaseous refrigerant; compressing the gaseous refrigerant after temperature and pressure rise, and sending the gaseous refrigerant into the condenser 3 to release heat; after releasing heat, the refrigerant is condensed into liquid refrigerant, and the refrigerant is expanded and reduced in pressure through an expansion valve 4; the liquid refrigerant after being expanded and depressurized is sent to the evaporator 5 to absorb heat for evaporation, and the liquid refrigerant is evaporated into gaseous refrigerant from the liquid state, and then returns to the compressor 2 to enter the next cycle.
In the primary cooling water circulation, primary cooling water is sent to the condenser 3 by a primary cooling water pump 6; taking away the heat released by the refrigerant in the condenser 3; the heat of the primary cooling water after absorbing heat and raising temperature is transferred to secondary cooling water through a high-pressure heat exchanger 7; the primary cooling water after heat release and temperature reduction is sent to the next circulation by the primary cooling water pump 6 after impurities are filtered by the primary cooling water filter 8.
In the high-pressure secondary cooling water circulation, secondary cooling water is sent to the high-pressure heat exchanger 7 by a secondary cooling water pump 9; the heat released by the primary cooling water is absorbed in the high-pressure heat exchanger 7; the secondary cooling water after absorbing heat and raising temperature is sent to a cooling tower 10 on the ground to exchange heat with the atmosphere; the secondary cooling water after heat exchange and temperature reduction with the atmosphere returns to the underground of the coal mining mine, impurities are filtered by a secondary cooling water filter 11, and then the secondary cooling water is sent to the next circulation by a secondary cooling water pump 9.
In the chilled water circulation, chilled water is sent to the tail end 13 of the air conditioner by a chilled water pump 12 after absorbing heat and reducing temperature by a refrigerant in an evaporator 5; the air at the working surface 16 is subjected to heat exchange and temperature reduction through the air conditioner tail end 13 to obtain air conditioner cold air 15 meeting the underground working requirement; the chilled water heated by absorbing the heat of the air in the air conditioner terminal 13 is filtered by a chilled water filter 14 to remove impurities, and then returns to the evaporator 5 to be cooled and enters the next cycle.
In this embodiment, the secondary cooling water in a high-pressure state is isolated from the primary cooling water in a low-pressure state by the high-pressure heat exchanger 7 which is a shell-and-tube type, the secondary cooling water flows through the tube side, and the primary cooling water flows through the shell side. In the high-pressure heat exchanger 7, secondary cooling water enters the secondary cooling water inlet pipe box 73a from the secondary cooling water inlet 74a, is distributed into each high-pressure heat exchange pipe 71 with two ends connected with the high-pressure pipe plate 72, exchanges heat with primary cooling water, and the secondary cooling water after heat absorption and temperature rise is collected into the secondary cooling water outlet pipe box 73b and then flows out of the high-pressure heat exchanger 7 from the secondary cooling water outlet 74 b; the primary cooling water flows into the housing 77 from the primary cooling water inlet 75a, and changes the flow direction through the multiple baffle plates 76 in the shell-side flow process of the high-pressure heat exchanger 7, so that the primary cooling water transversely washes the high-pressure heat exchange tubes 71 as much as possible to perform sufficient heat exchange, and the primary cooling water after heat release and temperature reduction flows out of the high-pressure heat exchanger 7 through the primary cooling water outlet 75 b.
The primary cooling water and the chilled water which directly enter the refrigerating unit 1 for heat exchange belong to low-pressure states, and the safe operation of the refrigerating unit 1 is ensured. The heat released by the condenser 3 of the refrigerating unit 1 is subjected to heat exchange by primary cooling water and secondary cooling water in sequence and is finally discharged through a cooling tower 10 on the ground instead of being discharged to the underground of a coal mine. The coal mining temperature reduction is achieved, and meanwhile, the underground operation and the safe operation of the whole coal mining mine are ensured.
In this embodiment, the secondary cooling water pump 9, the secondary cooling water filter 11, the tube side component high-pressure heat exchange tube 71, the high-pressure tube plate 72, the secondary cooling water inlet tube tank 73a, the secondary cooling water outlet tube tank 73b in the high-pressure heat exchanger 7, and the related pipelines for conveying the high-pressure secondary cooling water all belong to high-pressure equipment and components capable of bearing corresponding pressure.
Because the chilled water pipeline is insulated and the delivery function of the chilled water pump 12 is added, the requirement can be met only by moving the air conditioner tail end 13 at the working surface 16 along with the forward propulsion of the working surface 16; this prolongs the time period for moving the refrigerator group 1 and saves the moving cost.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (7)
1. A coal mining cooling system with high-pressure secondary cooling water heat exchange comprises a refrigeration cycle, a primary cooling water cycle, a high-pressure secondary cooling water cycle and a chilled water cycle of a refrigerating unit; the method is characterized in that: the secondary cooling water in a high-pressure state is isolated from the primary cooling water in a low-pressure state through a high-pressure heat exchanger (7); the cooling water directly enters the refrigerating unit (1) to take away the heat released by the condenser (3), and is primary cooling water in a low-pressure state; then the secondary cooling water absorbs the heat in the primary cooling water again and is sent to a cooling tower (10) on the ground to be discharged.
2. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: the primary cooling water and the chilled water which directly enter the refrigerating unit (1) for heat exchange belong to low-pressure states, and the safe operation of the refrigerating unit (1) is ensured.
3. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: the heat released by the condenser (3) in the refrigeration process is subjected to heat exchange by primary cooling water and secondary cooling water in sequence, and is finally discharged through a cooling tower (10) on the ground instead of being discharged to the underground of a coal mining mine; the coal mining temperature reduction is achieved, and meanwhile, the underground operation and the safe operation of the whole coal mining mine are ensured.
4. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: the refrigeration water pipeline is insulated, and the refrigeration water pump (12) is used for conveying, so that the requirements can be met only by moving the air conditioner tail end (13) at the working surface (16) along with the forward propulsion of the working surface (16); therefore, the machine moving time period of the refrigerating unit (1) is prolonged, and the machine moving cost is saved.
5. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: in the chilled water circulation, a chilled water filter (14) is installed between the air conditioner terminal (13) and the evaporator (5); after the air conditioner tail end (13) is moved, impurities entering the chilled water in the process of assembling and disassembling the air conditioner tail end (13) are filtered in time through a chilled water filter (14); in addition, filters are also respectively installed in the primary cooling water circulation and the high-pressure secondary cooling water circulation so as to filter impurities entering the circulation in time.
6. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: the primary cooling water pump (6), the secondary cooling water pump (9) and the freezing water pump (12) are all arranged on one side of the respective circulation, which is relatively low in temperature, so that the cavitation resistance of each water pump is favorably improved, and the service life is prolonged.
7. The coal mining cooling system with high-pressure secondary cooling water heat exchange function according to claim 1, characterized in that: the refrigerating unit (1) is a water-cooled water chilling unit, has good heat exchange effect, small heat exchange area and small unit volume, and is convenient for underground disassembly and assembly and movement; and moreover, the refrigeration coefficient is high, the power consumption is low, and the energy-saving effect is good.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921289385.2U CN210343404U (en) | 2019-08-09 | 2019-08-09 | Coal mining cooling system with high-pressure secondary cooling water heat exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921289385.2U CN210343404U (en) | 2019-08-09 | 2019-08-09 | Coal mining cooling system with high-pressure secondary cooling water heat exchange |
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| CN210343404U true CN210343404U (en) | 2020-04-17 |
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| CN201921289385.2U Expired - Fee Related CN210343404U (en) | 2019-08-09 | 2019-08-09 | Coal mining cooling system with high-pressure secondary cooling water heat exchange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332004A (en) * | 2019-08-09 | 2019-10-15 | 王德明 | Coal mining cooling system with the heat exchange of high-voltage secondary cooling water |
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2019
- 2019-08-09 CN CN201921289385.2U patent/CN210343404U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332004A (en) * | 2019-08-09 | 2019-10-15 | 王德明 | Coal mining cooling system with the heat exchange of high-voltage secondary cooling water |
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Granted publication date: 20200417 Termination date: 20210809 |