Mine exhaust waste heat utilization system

Abstract

A mine exhaust waste heat utilization system is characterized in that the waste heat utilization system comprises a heat pump system, a mine ventilation system and a hot water utilization system; the heat pump system is composed of an evaporator, a compressor, a condenser and a throttling valve. The mine ventilation system is composed of an induced draft fan, an air supply pipe, an air blower and an exhaust pipe. The hot water utilization system consists of a tap water inlet pipe, a condenser heat exchanger and a high-level water tank; one end of the air blower is connected with the rainproof elbow, and the other end is connected with the air supply pipe; one end of the cyclone dust collector is connected with the exhaust pipe, and the other end is connected with the induced draft fan; one end of the bag type dust collector is connected with the evaporator heat exchanger, and the other end is connected with the induced draft fan. An insect-proof net a, a rainproof elbow and an insect-proof net b are arranged at an air inlet and an air outlet of the air supply pipe, an insect-proof net c is arranged at an air inlet of the exhaust pipe, and a windproof and rainproof cap is arranged at the tail end of the exhaust vertical pipe. The heat pump unit is used for waste heat utilization of mine exhaust air, and energy conservation and environmental protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mine exhaust heat utilization system, belong to the energy-saving field invention creation. BACKGROUND

[0002] China's mining industry has a long history, since ancient times, mining industry has existed, and a relatively complete mining system is formed, since the reform and opening up, China's mining industry has entered a rapid development stage, the equipment and technology used are constantly progressing, and now, China's mining industry is moving towards green transformation and high-quality development. The situation under the mine is relatively complex, the underground space is narrow, and there are interconnected mine tunnels. Different mine tunnels have different work arrangements according to different work tasks. At the same time, there are pipelines and lines for ventilation and lighting in the mine, which produce some noise and dust. The temperature in the mine is very high, mainly due to the heat generated by mining equipment operation, blasting, high-temperature wall surface, and miners, which can reach 45°C, and the working environment is poor. Usually, the method to improve the underground mine heat environment is to send in a large amount of fresh air to absorb heat and suck a large amount of dust. High-temperature and high-pollution gas is directly discharged without treatment. The exhaust air temperature is usually higher than 30°C, which causes thermal pollution to the surrounding environment and destroys the ecology.

[0003] However, the existing mine ventilation heat utilization has some problems. The measures for mine ventilation and heat utilization are relatively simple, which cannot effectively solve the problem of heat utilization while enhancing the effect of mine ventilation. For example, Chinese patent 202411988314.7 discloses a mine ventilation and air exchange device for mining, which includes an outer cylinder. A circular filter screen is provided in the inner cavity of the outer cylinder. A monitoring module is provided at the bottom of the circular filter screen. When the device is used for mine ventilation, dust will adhere to the circular filter screen, dilute and remove the dust, and adjust the air quality underground. However, the design has the following shortcomings: first, the device can only treat dust and harmful gas in the mine, but it does not solve the problem of mine heat treatment, which will still cause pollution to the surrounding environment when discharged into the air; second, although the absorbed dust enters the receiving box, personnel still need to enter the mine to clean it regularly, which requires human intervention, making the device lack of automation. The present invention can use hot air in the mine as a low-temperature heat source for a heat pump, and the heat generated by the heat pump can be used to heat water. In addition, the cyclone dust collector and bag-type dust collector can effectively solve the problem of dust carried by mine hot air, reducing the pollution and damage of mine hot air to the surrounding environment. SUMMARY

[0004] The utility model discloses a basic train of thought is: through the air blower and sends the fresh air to the mine tunnel to the inside through the air supply pipe, and the fresh air exchanges heat with the mine tunnel inner wall, reduces the temperature in the mine, and the hot air produced after heat exchange with the fresh air, because the mine air exists a large amount of dust, sets up the cyclone dust collector, and the dust-containing hot air is separated after the dust-containing hot air through the cyclone dust collector big particle dust and is collected with the air suction machine, and then passes through the bag type dust collector, and the bag type dust collector filters the fine suspended matter, forms the clean air flow, and is transported to the evaporator heat exchanger through the hose, and the hot air flows through the evaporator surface, and the refrigerant exchanges heat directly with the hot air, and the refrigerant vaporizes after absorbing heat, and the temperature of the hot air after the evaporator heat exchanger is reduced, and is discharged to the outside through the exhaust vertical pipe, reduces the harmful substances such as dust carried in the hot air to the adverse effect on the surrounding environment. The gaseous refrigerant after vaporization flows into the suction port of the compressor through the pipeline of the evaporator outlet naturally, and this process relies on the pressure difference of the refrigerant itself and the guidance of the system pipeline. The gaseous refrigerant after flowing into the compressor reduces the volume constantly, and the temperature and pressure of the refrigerant increase, and form high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure refrigerant gas enters the condenser along the exhaust pipeline, and the high-temperature and high-pressure gaseous refrigerant in the condenser exchanges heat with water, and heats the tap water. The heated hot water is stored in the high-level water tank, and the high-level water tank is mainly used for when needing water, and the water in the water tank flows downward along the pipeline by relying on the gravity, and provides water flow power for each water point, and guarantees that water can reach the required place smoothly. Meanwhile, the high-pressure liquid refrigerant after heat exchange with water in the condenser and temperature reduction directly flows into the throttling valve through the pipeline, and the throttling valve reduces the temperature and pressure of the high-pressure liquid refrigerant, and makes it transform into low-pressure and low-temperature liquid refrigerant, and flows into the evaporator through the liquid pipe to carry out the next cycle operation.

[0005] The utility model discloses a technical scheme is: the utility model relates to a kind of mine exhaust heat utilization system, by constructing closed loop system of mine ventilation system and heat pump energy recovery, realize the synergistic effect of cooling, dust removal and waste heat utilization.System adopts air blower to extract fresh air from outside, directional delivery is carried out to mine operating surface through air supply pipe, replace internal high-temperature gas, reduce the temperature of mine while introducing fresh air;Air suction machine is continuously extracted by exhaust pipe with dust-containing hot air, because there is a large amount of dust in mine air, so set up cyclone dust collector and bag type dust collector.Dust-containing hot air is separated sequentially by cyclone dust collector big particle dust, bag type dust collector filters fine suspended matter, and forms clean air flow.The airflow after purification enters the evaporator of heat pump system and exchanges heat, accelerates refrigerant evaporation using mine exhaust heat, significantly improves refrigeration cycle efficiency;While absorbing heat, the temperature of airflow is greatly reduced, finally is discharged through exhaust vertical pipe, avoid heat pollution accumulation;The condenser heat exchanger of heat pump system is connected with tap water pipeline on one side, refrigerant condensation releases heat to heat tap water, and hot water is stored in high-level water tank for daily use of worker.

[0006] The whole device adopts modular design, the mine ventilation system and the heat pump unit are connected through the air pipe, the erosion of dust on the precision equipment is reduced, the insect prevention net a, the insect prevention net b and the rainproof elbow are arranged at the air inlet and outlet of the air supply pipe, the insect prevention net c is arranged at the air inlet of the exhaust pipe, the main function is to physically isolate insects and prevent pipe backflow or water accumulation, and the rainproof cap is arranged at the end of the exhaust vertical pipe. The core value lies in that the traditional mine heat damage is converted into available resources, a sustainable cycle of "new air cooling-dust removal and purification-waste heat recovery" is formed, the limitation of single function equipment is broken through, and double breakthroughs of environmental governance and energy regeneration are realized.

[0007] The utility model discloses the advantages are: the reuse of mine exhaust waste heat, green environmental protection, save power consumption, reduce the outlay and save the cost, reduce the energy consumption of mining area, at the same time, the waste heat utilization can reduce the underground temperature, reduce the risk of heat stroke of worker, reduce the probability of gas explosion, the temperature reduction hot air after heat exchange with evaporator refrigerant is discharged to the outside through exhaust vertical pipe, compared with the direct discharge to the outside through vertical shaft, can reduce the damage and pollution to the surrounding environment. The mine exhaust waste heat utilization system has good cooling effect, good safety performance, practicality and popularization. BRIEF DESCRIPTION OF DRAWINGS

[0008] The present specification includes one drawing: Figure 1 It is the mine exhaust waste heat utilization facade. In the drawing: 1, evaporator, 2, compressor, 3, condenser, 4, throttle valve, 5, evaporator heat exchanger, 6, condenser heat exchanger, 7, high-level water tank, 8, water inlet pipe of tap water, 9, bag type dust collector, 10, induced draft fan, 11, cyclone dust collector, 12, exhaust pipe, 13, air blower, 14, air supply pipe, 15, vertical shaft a, 16, vertical shaft b, 17, rainproof elbow, 18, insect prevention net a, 19, insect prevention net b, 20, insect prevention net c, 21, exhaust vertical pipe, 22, rainproof cap, 23, soil layer, 24, mine. DETAILED DESCRIPTION

[0009] The utility model makes further description in combination with the drawings. As shown in the figure, the front end of the rainproof elbow pipe 17 is provided with an insect screen a 18, the air blower 13 introduces a large amount of fresh air into the shaft a 15 through the air supply pipe 14, the air supply pipe (14) is provided with the insect screen a (18), the insect screen b (19) and the rainproof elbow (17) at the air inlet and outlet, the air inlet of the exhaust pipe (12) is provided with the insect screen c (20), and the end of the exhaust vertical pipe (21) is provided with a rainproof air cap (22). Among them, the insect screen a, the insect screen b and the insect screen c are all three-layer stainless steel screens, which can effectively prevent insects from entering the pipeline; the top of the rainproof air cap (22) is provided with a guide vane, which can prevent rainwater from flowing back and optimize air discharge. The hot air generated in the mine tunnel 24 is collected by the induced draft fan 10 through the exhaust pipe 12 and the shaft b 16, before the hot air enters the induced draft fan 10, it first passes through the cyclone dust collector 11 to separate large particles of dust in the hot air from the airflow and collect on the wall, and then falls into the hopper by gravity. The hot air collected by the induced draft fan 10 after being treated by the cyclone dust collector 11 is transmitted to the bag-type dust collector 9 through a hose, and the fine suspended matter is deeply filtered, and the hot air treated by the bag-type dust collector is transmitted to the evaporator heat exchanger 5 through a hose, the hot air flows through the surface of the evaporator 1, the refrigerant directly contacts the hot air for heat exchange, the refrigerant vaporizes after absorbing heat, and the gaseous refrigerant enters the compressor 2 through the pipeline, the compressor 2 compresses the high-temperature gaseous refrigerant in the evaporator 1 into high-temperature high-pressure gaseous refrigerant, and then sends the refrigerant into the condenser heat exchanger 6 through the pipeline. The condenser 3, the condenser 3 continuously exchanges heat with water during the heat release process, and the heated hot water is stored in the high-level water tank 7 to provide hot water for the mine workers, and the water inlet pipe 8 connected with the condenser 3 through the pipeline also provides a water source. With the continuous heat exchange process of the condenser 3, the temperature of the refrigerant is continuously reduced, and the high-pressure liquid refrigerant is obtained. The high-pressure liquid refrigerant with reduced temperature enters the throttling valve 4 through the pipeline, the liquid refrigerant is throttled and decompressed, the pressure and temperature of the refrigerant are reduced, and the low-temperature low-pressure liquid refrigerant is obtained. Then the pipeline flows back to the evaporator 1 and reenters the cycle. The hot air with reduced temperature after blowing to the evaporator heat exchanger 5 is discharged into the air through the exhaust vertical pipe 21.

[0010] If a person skilled in the art is inspired by it, without departing from the purpose of the utility model, similar structure and embodiments can be designed without creative design, which should belong to the protection scope of the utility model.

Claims

1. A mine exhaust heat utilization system, characterized in that The waste heat utilization system comprises a heat pump system, a mine ventilation system and a hot water utilization system; the heat pump system is composed of an evaporator (1), a compressor (2), a condenser (3) and a throttle valve (4); the mine ventilation system is composed of an induced draft fan (10), a cyclone dust collector (11), a bag-type dust collector (9), an exhaust pipe (12), a blower (13) and a supply air pipe (14); the hot water utilization system is composed of a tap water inlet pipe (8), a condenser heat exchanger (6) and a high-level water tank (7); one end of the blower (13) is connected with a rainproof elbow (17), and the other end is connected with the supply air pipe (14); one end of the cyclone dust collector (11) is connected with the exhaust pipe (12), and the other end is connected with the induced draft fan (10); one end of the bag-type dust collector (9) is connected with the evaporator heat exchanger (5), and the other end is connected with the induced draft fan (10).

2. The mine exhaust heat utilization system according to claim 1, characterized in that: The air inlet of the exhaust pipe (12) is provided with an insect screen c (20), the air inlet of the supply air pipe (14) is provided with an insect screen a (18), an insect screen b (19) and a rainproof elbow (17), and the end of the exhaust vertical pipe (21) is provided with a rainproof air cap (22).

3. The mine exhaust heat utilization system according to claim 1, characterized in that: The insect screen a (18), the insect screen b (19) and the insect screen c (20) are three-layer stainless steel screens, and the top of the rainproof air cap (22) is provided with guide vanes.

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