CN202391454U - Evaporating and cooling ventilation temperature-reducing device for mine shaft - Google Patents

Abstract

Mine evaporative cooling ventilation and cooling device, the fresh air outlet and air supply outlet are set on the opposite side wall of the unit shell, and the primary effect filter, tube-type indirect evaporative cooler, high-pressure air injection section, The direct evaporative cooling section of the spray room, the water baffle and the air blower, and the air outlet on the upper unit shell wall of the tubular indirect evaporative cooler, and the relative directions on the unit shell wall corresponding to the lower part of the tubular indirect evaporative cooler are respectively Set up two return air outlets. The device of the utility model organically combines indirect evaporative cooling, high-pressure air injection and water spray chamber to play the role of precooling in summer and preheating in winter; the two-stage evaporative cooling makes the functions of high-pressure air injection and water spray chamber complementary, fully exerting evaporative cooling At the same time, it overcomes the shortcomings of high relative humidity of indirect evaporative cooling and low efficiency of direct evaporative cooling, and effectively utilizes mine return air and general compressed air to make the device energy-saving, efficient and clean.

Description

Mine evaporative cooling ventilation cooling device

technical field

The utility model belongs to the technical field of air-conditioning equipment, and in particular relates to an energy-saving ventilation and cooling device for mines with a high-pressure air jet cooling and moisture absorption section.

Background technique

With the development of our country's economy and social progress, under the background of the national grand strategy of energy conservation and emission reduction, and people's requirements for improving the working environment in places such as mines, people urgently need an effective air conditioning system. It is an energy-saving ventilation and cooling device for mines that can achieve purification, cooling, and efficient operation while effectively reducing system power consumption.

At present, most evaporative coolers are only multi-stage indirect and direct evaporation processes, or air-conditioning technologies combined with other mechanical refrigeration methods. Although the use of these systems can achieve the cooling and humidification of the air, they cannot achieve the purpose of purification and cooling in large quantities for workplaces such as mines that require a large amount of cooling and dehumidification and dusty mines.

Contents of the invention

The purpose of this utility model is to provide an evaporative cooling ventilation and cooling device for mines. The tubular indirect, high-pressure air jet and water spray chamber are combined in sequence, so that the functions of the high-pressure air jet and the water spray chamber are complementary, and the direct evaporative cooling efficiency is improved. In order to meet the requirements of cooling, dehumidifying and purifying air for heat dissipation in mines, in winter, the circulating water pump of the tubular indirect evaporative cooler is turned off to preheat the outdoor fresh air.

The technical solution adopted by the utility model is that, the evaporative cooling ventilation and cooling device for mines is provided with fresh air outlets and air supply outlets on the opposite side walls of the unit casing, and primary effectors are arranged in sequence in the unit casing according to the direction of air entry. Filter, tube-type indirect evaporative cooler, high-pressure air injection section, direct evaporative cooling section of water spray chamber, water baffle and blower, and an exhaust port is set on the unit shell wall above the tube-type indirect evaporative cooler, which is the same as the tube-type indirect evaporative cooler. Two return air outlets are arranged in opposite directions on the unit casing wall corresponding to the lower part of the indirect evaporative cooler.

The utility model is also characterized in that,

The tubular indirect evaporative cooler is composed of an exhaust fan, a heat exchange tube family, and a water collection tank a arranged in sequence from top to bottom. A water filter is provided, and the water collecting tank a is communicated with the water filter, the circulating water pump a and the dripping pipe through pipelines.

The high-pressure air injection section includes a vertically arranged high-pressure air injection standpipe, which communicates with the return air in the mine through a compressed air pipeline, and a high-pressure gas-saving nozzle that is countercurrent to the processed air is arranged on the high-pressure air injection riser.

The structure of the direct evaporative cooling section of the spray room: it includes at least two standpipes arranged vertically and parallelly, nozzles are arranged on the standpipes, and a water collection box b is arranged under the standpipe and the nozzles. The water collection box b (11) passes through the pipeline and the circulation The water pump b, the standpipe and the nozzle are connected.

The nozzle is a hydrodynamic target impinging flow nozzle.

The water retaining plate adopts corrugated water retaining plate.

Compared with the prior art, the ventilation and cooling device of the present invention has the following characteristics:

1) The return air at around 21°C from the mine is used as the secondary air in the tube-type indirect evaporative cooling section, which not only realizes energy and heat recovery, but also improves the cooling efficiency of the tube-type indirect evaporative cooling section.

2) Layered water distribution outside the tube in the tube-type indirect evaporative cooling section. Avoid "dry spots" on the outer wall of some tubes, so that secondary air and water, primary air and secondary air and water can fully exchange heat and moisture.

3) The high-pressure air injection section is set behind the tube-type indirect evaporative cooling section. The temperature of the air pre-cooled by the tube-type indirect evaporative cooling section will decrease, but the relative humidity will increase, which will reduce the temperature difference between the dry and wet bulbs of the treated air. After mixing the dry and low-temperature high-pressure jet with the air treated in the first stage—indirect evaporative cooling, it can be cooled and absorbed by moisture, and the temperature difference between dry and wet bulbs of the treated air can be increased, so that the efficiency of the second stage—direct evaporative cooling section is greatly improved. improve. Thereby improving the cooling effect of the whole unit.

Description of drawings

Fig. 1 is the structural representation of the utility model device;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left side view of the high-pressure jet section in the utility model device;

Fig. 4 is the structural representation of the tubular indirect evaporative cooler in the utility model device;

Fig. 5 is a perspective view of the tubular indirect evaporative cooler in the device of the present invention.

In the figure, 1. fresh air outlet, 2. primary filter, 3. tubular indirect evaporative cooler, 4. water collection tank a, 5. water filter, 6. circulating water pump a, 7. dripping pipe, 8. Compressed air pipeline, 9. High-pressure air jet standpipe, 10. High-pressure gas-saving nozzle, 11. Water collection tank b, 12. Circulating water pump b, 13. Standpipe, 14. Nozzle, 15. Water retaining plate, 16. Blower fan, 17. Air supply port, 18. air return port, 19. exhaust fan, 20. air exhaust port.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The evaporative cooling ventilating cooling device for mines of the utility model adopts a composite structure of tube-type indirect evaporative cooling heat exchange, high-pressure air jet heat-moisture exchange and water spray chamber heat-moisture exchange equipment. Its relative position and structure are shown in Figure 1 and Figure 2. The fresh air outlet 1 and the air supply outlet 17 are respectively arranged on the opposite side walls of the unit casing, and the primary filter 2 and the pipe are arranged in sequence in the direction of air entering in the unit casing. Type indirect evaporative cooler 3, high-pressure air injection section, direct evaporative cooling section of water spray chamber, water baffle 15 and air blower 16, air outlet 20 is set on the unit shell wall on the upper part of tube-type indirect evaporative cooler 3, and tube-type indirect evaporative cooler 3 Two return air outlets 18 are arranged in opposite directions on the unit casing wall corresponding to the lower part of the indirect evaporative cooler 3 .

The structure of the tubular indirect evaporative cooler 3 is shown in Fig. 4 and Fig. 5. It is composed of an exhaust fan 19, a heat exchange tube family, and a water collection tank a4 arranged in sequence from top to bottom. The upper and middle parts of the heat exchange tube family are provided with The dripping pipe 7 that sprays downwards, the water filter 5 is set in the water collecting tank a4, and the water collecting tank a4 is communicated with the water filter 5, the circulating water pump a6 and the dripping pipe 7 through pipelines.

The structure of the high-pressure jet section is as shown in Figure 3, comprises the vertically arranged high-pressure jet riser 9, and the high-pressure jet riser 9 communicates with the return air in the mine through the compressed air pipeline 8, and the high-pressure jet riser 9 is provided with four and High-pressure air-throttle nozzle 10 with reverse flow of treated air.

The structure of the direct evaporative cooling section of the water spray chamber: it includes three rows of standpipes 13 vertically and parallelly arranged, each row is divided into three water supply standpipes, the standpipe 13 is provided with a nozzle 14, and the lower part of the standpipe 13 and the nozzle 14 is provided with a water collection tank b11, the water collection tank b11 communicates with the circulating water pump b12, the standpipe 13 and the nozzle 14 through pipelines. The nozzle 14 is a hydrodynamic target impinging flow nozzle 14 .

The ventilation and cooling device for mines of the utility model adopts a three-stage air treatment process.

The water collecting tank a4, the water filter 5, the circulating water pump a6, the dripping pipe 7, the air return port 18, the air outlet 20 and the dripping pipe 7 constitute the first stage air treatment process. In the tube-type indirect evaporative cooling section, two standpipes are set up to evenly provide dripping pipes 7 for the upper and middle parts to drip down the pipe wall. The dripping pipes 7 are arranged in layers to make the water distribution even. Open in summer, as a pre-cooling device; closed in winter, as an air-air heat exchanger to preheat outdoor fresh air. The water is pumped out from the water collection tank a4 through the circulating water pump a6 and dripped out from the dripping pipe 7, so that the water can be dripped evenly on the pipe wall and fully contacted with the secondary air, reducing the temperature of the secondary air and bringing The heat of the primary air in the pipe is used to precool the primary air, that is, the processed air.

The high-pressure air injection section formed by the compressed air pipeline 8, the high-pressure air injection standpipe 9 and the high-pressure throttle nozzle 10 is the second-stage air treatment process. The high-pressure air injection section adopts the general compressed air in the mine, and sends it to the high-pressure air-saving nozzle 10 through the general compressed air pipeline 8 and the high-pressure air injection standpipe 9, and counterflows and mixes with the air pre-cooled by the tube-type indirect evaporative cooler 3. It cools and absorbs moisture.

The direct evaporative cooling section of the water spray chamber composed of the water collection tank b11, the circulating water pump b12, the water supply standpipe 13 and the hydrodynamic target impinging flow nozzle 14 is the third stage air treatment process. Three rows of water supply standpipes 13 are adopted, each row has three water supply standpipes, and the water in the water collection tank b11 is sent to the hydrodynamic target impact flow nozzle 14 through the standpipe 13 to spray the air by using the circulating water pump b12. The air is cooled and humidified while absorbing heat and vaporized in the air. This is a method of cooling and humidifying the air by directly contacting the air with water.

The primary filter 2 can purify the outdoor air, protect the tubular indirect evaporative cooler 3 from dust, and improve the heat and mass exchange efficiency between the water film and the air.

The water in the water collecting tank a4 will be processed through the water filter 5 to prevent the water outlet of the circulating water pump a6 and the dripping pipe 7 from being blocked.

The water baffle 15 provided after the direct evaporative cooling section of the water spray chamber adopts corrugated water baffle 15 to separate the water in the air passing through the water spray chamber, so as to reduce the amount of water taken away in the treated air.

The air blower 16 is to send the processed air into the air-conditioning area through the air supply port 17 to lower the temperature and dehumidify the air therein.

The working process of the utility model device:

In summer, the outdoor fresh air enters through the fresh air outlet 1 and passes through the primary effect filter 2 to filter the dust, then passes through the tubular indirect evaporative cooler 3, and at the same time, the water passes through the circulating water pump a6 to pressurize the purified water in the water collection tank a4, and then passes through The drip pipe 7 drips onto the outer wall of the pipe, and the water flows down by gravity to wet the outer wall of the pipe and form a water film. The return air in the mine is used as the secondary air of the tubular indirect evaporative cooler 3 to exchange heat and moisture with the water film , so as to perform isohumidity cooling on the primary air in the tube. The preliminarily cooled air enters the high-pressure air injection section, and is mixed with the dry and low-temperature high-pressure air jet sprayed out through the compressed air pipeline 8, the high-pressure air injection standpipe 9 and the high-pressure air-saving nozzle 10, and is subjected to cooling and moisture absorption treatment to improve the dryness of the treated air. Wet bulb temperature difference. In the third-stage direct evaporative cooling section - water spray room, the water in the water collection tank b11 is pressurized by the circulating water pump b12, and then sprayed out through the standpipe 13 and the nozzle 14, and exchanges heat and moisture with the air to be treated. Carry out isenthalpic cooling and humidification. Then the treated air passes through the corrugated water baffle 15 to separate the water in the air to reduce the amount of water entrained in the air, and finally the treated air is sent into the air-conditioning area by the blower 16 through the air supply port 17.

In winter, the tubular indirect evaporative cooler 3 is used as a preheating device. The treated outdoor fresh air enters through the fresh air outlet 1 and passes through the primary effect filter 2 to filter the dust, and then enters the tube of the tubular indirect evaporative cooler 3, turns off the circulating water pump a6, and uses the high-temperature return air of the mine as the secondary air and the primary air The air is subjected to indirect heat exchange, as an air-air heat exchanger to preheat the outdoor fresh air, and then heat it.

Claims (6)

1. The evaporative cooling ventilation and cooling device for mines is characterized in that fresh air outlets (1) and air supply outlets (17) are respectively arranged on the opposite side walls of the unit casing, and there are sequentially arranged in the unit casing according to the direction of air entering Primary filter (2), tubular indirect evaporative cooler (3), high-pressure air injection section, direct evaporative cooling section of water spray chamber, water baffle (15) and blower (16), the tubular indirect evaporative cooler (3) An air outlet (20) is provided on the upper unit casing wall, and two return air outlets (18) are respectively provided on the unit casing wall corresponding to the lower part of the tubular indirect evaporative cooler (3). ). 2. The evaporative cooling, ventilation and cooling device for mines according to claim 1, characterized in that the tubular indirect evaporative cooler (3) consists of an exhaust fan (19) and heat exchange tubes arranged in sequence from top to bottom Family and water collection tank a (4), the upper and middle parts of the heat exchange tube family are provided with dripping pipes (7) for downward spraying, and the water collection tank a (4) is provided with a water filter (5), The water collecting tank a (4) is communicated with the water filter (5), the circulating water pump a (6) and the dripping pipe (7) through pipelines. 3. The evaporative cooling, ventilation and cooling device for mines according to claim 1, characterized in that, the high-pressure air injection section includes a vertically arranged high-pressure air injection riser (9), and the high-pressure air injection riser (9) The compressed air pipe (8) communicates with the return air in the mine, and the high-pressure air injection standpipe (9) is provided with a high-pressure throttling nozzle (10) countercurrent to the air to be processed. 4. The evaporative cooling, ventilation and cooling device for mines according to claim 1, characterized in that the structure of the direct evaporative cooling section of the spray chamber: includes at least two standpipes (13) vertically and parallelly arranged, and the standpipe (13) is provided with a nozzle (14), and the lower part of the standpipe (13) and the nozzle (14) is provided with a water collecting tank b (11), and the water collecting tank b (11) is connected with the circulating water pump b ( 12), standpipe (13) and nozzle (14) are connected. 5. The evaporative cooling, ventilation and cooling device for mines according to claim 4, characterized in that the nozzle (14) is a hydrodynamic target-type impinging flow nozzle (14). 6. The evaporative cooling, ventilation and cooling device for mines according to claim 1, characterized in that the water retaining plate (15) is a corrugated water retaining plate.

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