阅读说明：本技术 一种矿井乏风余热回收装置 (Mine ventilation air waste heat recovery device ) 是由 吴长锋 于 2021-08-23 设计创作，主要内容包括：一种矿井乏风余热回收装置,属于乏风回收技术领域,解决了传统乏风热量浪费、回收装置效率低、有腐蚀,爆炸隐患等技术问题。解决方案为：一种矿井乏风余热回收装置,包括风室、冷水储液箱、热水储液箱和若干组换热装置；风风室四周设有依次相接设置的若干组翅片式换热器,每组翅片式换热器连接有一组换热装置；换热装置包括压缩机和换热器,压缩机的进气口通过连接管路与翅片式换热器的出气口连接,压缩机的出气口通过连接管路与换热器的制冷剂进气口连接,换热器的制冷剂出液口通过连接管路与翅片式换热器的进液口连接。本发明结构简单,热量利用效率高,防尘、防水、防腐蚀,防冻,防爆,多组换热装置将乏风进行分配回收,安全可靠。(A mine ventilation air waste heat recovery device belongs to the technical field of ventilation air waste recovery and solves the technical problems of waste of heat of traditional ventilation air, low efficiency of the recovery device, corrosion, potential explosion hazards and the like. The solution is as follows: a mine ventilation air waste heat recovery device comprises an air chamber, a cold water liquid storage tank, a hot water liquid storage tank and a plurality of groups of heat exchange devices; a plurality of groups of fin type heat exchangers which are sequentially connected are arranged on the periphery of the air chamber, and each group of fin type heat exchangers is connected with a group of heat exchange devices; the heat exchange device comprises a compressor and a heat exchanger, wherein an air inlet of the compressor is connected with an air outlet of the finned heat exchanger through a connecting pipeline, an air outlet of the compressor is connected with a refrigerant air inlet of the heat exchanger through a connecting pipeline, and a refrigerant liquid outlet of the heat exchanger is connected with a liquid inlet of the finned heat exchanger through a connecting pipeline. The ventilation air conditioner has the advantages of simple structure, high heat utilization efficiency, dust prevention, water prevention, corrosion prevention, freezing prevention and explosion prevention, and safety and reliability because the multiple groups of heat exchange devices distribute and recover ventilation air.)

1. The utility model provides a mine ventilation air methane waste heat recovery device which characterized in that: comprises an air chamber (1), a cold water liquid storage tank (2), a hot water liquid storage tank (3) and a plurality of groups of heat exchange devices (4);

the bottom of the air chamber (1) is provided with a ventilation air inlet (1-1), the top surface of the air chamber (1) is provided with an adjusting window (1-2), a plurality of groups of fin type heat exchangers (1-3) which are sequentially connected are arranged on the periphery of the air chamber (1), the plurality of groups of fin type heat exchangers (1-3) are communicated with the inner cavity of the air chamber (1), and each group of fin type heat exchangers (1-3) is connected with a group of heat exchange devices (4);

the heat exchange device (4) comprises a compressor (4-1) and a heat exchanger (4-2), wherein an air inlet of the compressor (4-1) is connected with an air outlet of the finned heat exchanger (1-3) through a connecting pipeline, an air outlet of the compressor (4-1) is connected with a refrigerant air inlet of the heat exchanger (4-2) through a connecting pipeline, a refrigerant liquid outlet of the heat exchanger (4-2) is connected with a liquid inlet of the finned heat exchanger (1-3) through a connecting pipeline, a cold water inlet of the heat exchanger (4-2) is connected with the cold water liquid storage tank (2) through a cold water pipeline, and a hot water outlet of the heat exchanger (4-2) is connected with the hot water liquid storage tank (3) through a hot water pipeline;

an electronic expansion valve is arranged on a connecting pipeline between the heat exchanger (4-2) and the finned heat exchanger (1-3), and a temperature sensor and a pressure sensor are sequentially arranged on the connecting pipeline between the finned heat exchanger (1-3) and the compressor (4-1).

2. The mine ventilation air waste heat recovery device of claim 1, wherein: the refrigerant of the finned heat exchanger (1-3) is Freon.

3. The mine ventilation air waste heat recovery device of claim 1, wherein: and a second pressure sensor is arranged in the air chamber (1), the adjusting window is a (1-2) electric sliding window, and the adjusting window is controlled by a remote monitoring terminal.

4. The mine ventilation air waste heat recovery device of claim 1, wherein: four groups of louver blades (1-4) are uniformly distributed at the ventilation air inlet (1-1), the four groups of louver blades (1-4) are symmetrically arranged, and the inclined openings of the four groups of louver blades (1-4) respectively face four groups of side walls of the air chamber (1).

5. The mine ventilation air waste heat recovery device of claim 4, wherein: the angle between the louver blades (1-4) and the horizontal plane is 30-50 degrees.

6. The mine ventilation air waste heat recovery device of claim 1, wherein: the distance between the compressor (4-1) and the heat exchanger (4-2) and the air chamber (1) is not less than 20 m.

7. The mine ventilation air waste heat recovery device of claim 1, wherein: and a four-way valve is also arranged in each group of heat exchange devices (4).

Technical Field

The invention belongs to the technical field of ventilation air methane recovery, and particularly relates to a mine ventilation air methane waste heat recovery device.

Background

The ventilation air is also called coal mine air exhaust gas, namely coal mine gas with the methane concentration lower than 0.75 percent. According to statistics of relevant departments, methane exhausted into the atmosphere by the ventilation air methane in mountains of China every year is equivalent to the gas transmission amount of western gas in east 1 year, and the greenhouse gas effect is about 2 hundred million tons of carbon dioxide equivalent. Although the concentration of the air-exhausted gas is extremely low, the total amount of the air-exhausted gas is extremely large, the contained methane accounts for about 81 percent of the total amount of the coal mine gas methane in China, and the emission amount in 1 year is more than 150 billion cubic meters.

Besides carrying methane, the ventilation air methane also carries a large amount of heat, and the ventilation air methane is discharged underground through an exhaust fan in the existing treatment of the ventilation air methane, so that not only is a large amount of methane resources wasted, but also the heat carried by the ventilation air methane is wasted.

The existing ventilation air heat utilization and recovery efficiency is low, the ventilation air heat utilization and recovery device is operated at a ventilation air outlet and has explosion risks, the existing spraying type ventilation air heat recovery device sprays water mist at a mine outlet for heat exchange, the corrosion phenomenon can occur after the time is long, and water is wasted.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a mine ventilation air waste heat recovery device, which solves the technical problems of waste of heat of the traditional ventilation air, low efficiency of the recovery device, corrosion, potential explosion hazards and the like.

In order to solve the problems, the technical scheme of the invention is as follows: a mine ventilation air waste heat recovery device, wherein: comprises an air chamber, a cold water storage tank, a hot water storage tank and a plurality of groups of heat exchange devices;

the bottom of the air chamber is provided with a ventilation air inlet, the top surface of the air chamber is provided with an adjusting window, a plurality of groups of fin type heat exchangers which are sequentially connected are arranged on the periphery of the air chamber, the plurality of groups of fin type heat exchangers are communicated with the inner cavity of the air chamber, and each group of fin type heat exchanger is connected with a group of heat exchange devices;

the heat exchange device comprises a compressor and a heat exchanger, wherein an air inlet of the compressor is connected with an air outlet of the finned heat exchanger through a connecting pipeline, an air outlet of the compressor is connected with a refrigerant air inlet of the heat exchanger through a connecting pipeline, a refrigerant liquid outlet of the heat exchanger is connected with a liquid inlet of the finned heat exchanger through a connecting pipeline, a cold water inlet of the heat exchanger is connected with a cold water liquid storage tank through a cold water pipeline, and a hot water outlet of the heat exchanger is connected with a hot water liquid storage tank through a hot water pipeline;

and an electronic expansion valve is arranged on a connecting pipeline between the heat exchanger and the finned heat exchanger, and a temperature sensor and a pressure sensor are sequentially arranged on the connecting pipeline between the finned heat exchanger and the compressor.

Further, the refrigerant of the finned heat exchanger is Freon.

Further, a second pressure sensor is arranged in the air chamber, the adjusting window is an electric sliding window, and the adjusting window is controlled through a remote monitoring terminal.

Furthermore, four groups of louver blades are uniformly distributed at the ventilation air inlet, the four groups of louver blades are symmetrically arranged, and inclined openings of the four groups of louver blades face four groups of side walls of the air chamber respectively.

Furthermore, the angle between the louver blades and the horizontal plane is 30-50 degrees.

Further, the distance between the compressor and the heat exchanger and the air chamber is not less than 20 meters.

Furthermore, a four-way valve is also arranged in each group of heat exchange devices.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts the technical scheme that an air chamber is arranged at an outlet of mine ventilation air, fin type heat exchangers are arranged on the side walls of the periphery of the air chamber in a connected mode, each group of fin type heat exchangers is connected with a group of heat exchange devices, the ventilation air passes through the fin type heat exchangers from the air chamber, liquid refrigerant is converted into low-temperature low-pressure gas through high-temperature heat exchange of the ventilation air, the low-temperature low-pressure gas is converted into high-temperature high-pressure gas through a compressor, the high-temperature high-pressure gas enters the heat exchangers and is converted into high-pressure liquid refrigerant through cold water heat exchange, the high-temperature low-pressure liquid refrigerant is throttled through an electronic expansion valve and then enters the fin type heat exchangers to exchange heat with the ventilation air, and the low-temperature low-pressure liquid refrigerant is converted into gaseous refrigerant, and a group of circulation is completed; the heat is transferred to the cold water entering from the cold water pipeline by the heat exchanger after the heat exchanger, so that the cold water is changed into hot water and is discharged through the hot water pipeline, and the heat exchanger can be used for domestic water and the like;

2. water does not exist in the air chamber, and the corrosion phenomenon can not occur after the air chamber works for a long time;

3. a second pressure sensor in the air chamber detects the pressure in the air chamber, the opening degree of the adjusting window is remotely controlled, and the air pressure and the air speed of the air outlet can be controlled;

4. the arrangement of the louver blades ensures that the ventilation air has dustproof and waterproof functions when passing through the louver blades;

5. the compressor and the heat exchanger are far away from the air chamber, so that the explosion-proof effect is achieved, and the safety is high.

6. The heat exchanger can appear the frost layer after long-time work, can influence going on of heat transfer work, and when needs defrosting, cross valve work switches, carries out reverse refrigeration defrosting, changes the frost and prevents frostbite.

The ventilation air conditioner has the advantages of simple structure, high heat utilization efficiency, corrosion resistance, freezing prevention and explosion prevention, safety and reliability, and the ventilation air is distributed and recovered by the multiple groups of heat exchange devices.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the plenum of the present invention;

FIG. 3 is a schematic view of the interior of the plenum in the present invention viewed from above;

FIG. 4 is a view A-A of FIG. 3;

fig. 5 is a view B-B of fig. 3.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

A mine ventilation air waste heat recovery device as shown in fig. 1 to 5, wherein: comprises an air chamber 1, a cold water liquid storage tank 2, a hot water liquid storage tank 3 and a plurality of groups of heat exchange devices 4;

the bottom of the air chamber 1 is provided with a ventilation air inlet 1-1, the top surface of the air chamber 1 is provided with an adjusting window 1-2, the periphery of the air chamber 1 is provided with a plurality of groups of fin type heat exchangers 1-3 which are sequentially connected, the plurality of groups of fin type heat exchangers 1-3 are communicated with the inner cavity of the air chamber 1, and each group of fin type heat exchangers 1-3 is connected with a group of heat exchange devices 4; the ventilation air can be discharged through the finned heat exchanger 1-3, and the heat of the ventilation air is subjected to heat conversion through the finned heat exchanger 1-3.

The heat exchange device 4 comprises a compressor 4-1 and a heat exchanger 4-2, wherein an air inlet of the compressor 4-1 is connected with an air outlet of the finned heat exchanger 1-3 through a connecting pipeline, an air outlet of the compressor 4-1 is connected with a refrigerant air inlet of the heat exchanger 4-2 through a connecting pipeline, a refrigerant liquid outlet of the heat exchanger 4-2 is connected with a liquid inlet of the finned heat exchanger 1-3 through a connecting pipeline, a cold water inlet of the heat exchanger 4-2 is connected with the cold water liquid storage tank 2 through a cold water pipeline, and a hot water outlet of the heat exchanger 4-2 is connected with the hot water liquid storage tank 3 through a hot water pipeline;

an electronic expansion valve is arranged on a connecting pipeline between the heat exchanger 4-2 and the finned heat exchanger 1-3, and a temperature sensor and a pressure sensor are sequentially arranged on the connecting pipeline between the finned heat exchanger 1-3 and the compressor 4-1. The electronic expansion valve is automatically adjusted through parameters detected by the temperature sensor and the pressure sensor.

Further, the refrigerant of the finned heat exchanger 1-3 is Freon.

Further, a second pressure sensor is arranged in the air chamber 1, the adjusting window is a 1-2 electric sliding window, and the adjusting window is controlled through a remote monitoring terminal. The second pressure sensor transmits a signal to the remote monitoring terminal without the need of adjustment by a worker, and the air pressure and the air speed of the air outlet can be controlled by controlling the opening degree of the adjusting window 1-2.

Furthermore, four groups of louver blades 1-4 are uniformly distributed at the ventilation air inlet 1-1, the four groups of louver blades 1-4 are symmetrically arranged, and the inclined openings of the four groups of louver blades 1-4 face four groups of side walls of the air chamber 1 respectively. The louver blades 1-4 are obliquely arranged in the process of the ventilation air, the dustproof and waterproof effects are achieved, dust is blocked when the ventilation air passes through the louver blades 1-4, and steam in the ventilation air is condensed into water drops to fall off when touching the louver blades 1-4, so that the water drops cannot enter the air chamber 1, and the phenomenon that the air chamber 1 is corroded after the ventilation air is too long is avoided.

Furthermore, the included angle between the louver blades 1-4 and the horizontal plane is 30-50 degrees.

Further, the distance between the compressor 4-1 and the heat exchanger 4-2 and the air chamber 1 is not less than 20 meters. The air port far away from the ventilation air is safe and explosion-proof.

Further, a four-way valve is also arranged in each group of heat exchange devices 4. Four mouths of cross valve are connected with compressor, finned heat exchanger and heat exchanger respectively, can appear the frost layer after long-time work, can influence going on of heat transfer work, when needs change the frost, and cross valve work switches, changes inside direction, carries out reverse defrosting, changes the frost and prevents frostbite.

The working principle is as follows: the ventilation air passes through the finned heat exchanger 1-3 from the air chamber 1, liquid refrigerant is changed into low-temperature and low-pressure gas through the high-temperature heat of the ventilation air, the low-temperature and low-pressure gas is changed into high-temperature and high-pressure gas through the compressor 4-1, the high-temperature and high-pressure gas enters the heat exchanger 4-2 and is subjected to heat exchange with cold water to be changed into high-pressure liquid refrigerant, the high-temperature and low-pressure liquid refrigerant is throttled through the electronic expansion valve and then enters the finned heat exchanger 1-3 to exchange heat with the ventilation air to be changed into gaseous refrigerant, and a group of circulation is completed; the heat exchanger 4-2 transfers the heat to the cold water entering from the cold water pipeline, so that the cold water is changed into hot water and is discharged through the hot water pipeline, the temperature of the hot water can reach 60 ℃, and the heat exchanger can be used for various aspects such as domestic water and the like.