Coupling type cooling tower of liquid nitrogen gasifier

Abstract

The utility model discloses a liquid nitrogen gasifier coupling type cooling tower which comprises a circulating water flow channel and a liquid nitrogen flow channel, the liquid nitrogen flow channel penetrates through the circulating water flow channel, and liquid nitrogen in the liquid nitrogen flow channel absorbs heat to complete gasification when penetrating through the circulating water flow channel. The cooling tower further comprises a cooling tower body; the circulating water flow channel comprises a spraying part, a water collecting tank and a water return flow channel, the spraying part and the water collecting tank are arranged in the cooling tower body, and the spraying part is located on the upper side of the water collecting tank; two ends of the backwater flow channel are respectively connected to the spraying component inlet and the water collecting tank outlet; according to the utility model, through coupling of the gasifier and the cooling tower, cold energy generated by gasification of liquid nitrogen is recycled, so that the temperature of circulating water is obviously reduced while sufficient gasification of the liquid nitrogen is ensured, and the workload of the cooling tower is effectively reduced; meanwhile, saturated damp and hot airflow in the cooling tower is cooled when passing through the gasifier, part of water vapor is condensed back into the tower, evaporation loss of the cooling tower is reduced, and water consumption is reduced; the technical effects of sufficient liquid nitrogen gasification and energy and water conservation are achieved.

Description

Technical Field

[0001] The utility model relates to a liquid nitrogen gasifier coupled cooling tower, belonging to the technical field of cooling equipment. Background Art

[0002] A large amount of nitrogen is required in the production process of lithium batteries, and a vaporizer is usually used to vaporize liquid nitrogen to ensure nitrogen supply. The widely used air-temperature vaporizer currently uses air as a heat source, without consuming additional energy, which is economical and convenient. However, liquid nitrogen has a pressure of 0.7MPaG and a vaporization temperature of about -170℃. The working efficiency of the air-temperature vaporizer is low, and a large amount of cold energy is released into the air without being used. At the same time, the vaporizer will frost after long-term use, and the frost is most significant near the liquid nitrogen inlet, which seriously affects the working efficiency of the vaporizer. In a high-humidity environment, this situation will be further exacerbated. Utility Model Content

[0003] The utility model aims to overcome the deficiencies in the prior art and provide a liquid nitrogen vaporizer coupled cooling tower to solve the technical problems that the vaporizer has low working efficiency, a large amount of cold energy causes frosting, and affects the normal operation of the vaporizer.

[0004] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0005] The utility model provides a liquid nitrogen gasifier coupled cooling tower, comprising:

[0006] Circulating water channel;

[0007] A liquid nitrogen flow channel passes through the circulating water flow channel, and the liquid nitrogen in the liquid nitrogen flow channel absorbs heat and completes gasification when passing through the circulating water flow channel.

[0008] Optionally, the cooling tower also includes a cooling tower body; the circulating water flow channel includes a spray component, a water collecting tank and a return water flow channel, the spray component and the water collecting tank are arranged in the cooling tower body, and the spray component is located on the upper side of the water collecting tank; the two ends of the return water flow channel are respectively connected to the inlet of the spray component and the outlet of the water collecting tank.

[0009] Optionally, the spray component includes a plurality of spray pipes connected end to end in sequence, the plurality of spray pipes are arranged in an array, and spray heads are sequentially arranged at intervals at the bottom of each of the spray pipes.

[0010] Optionally, a flow meter, a thermometer, a water pump and water-using equipment are provided on the return water flow channel, and the flow meter and the thermometer are arranged at the outlet of the return water flow channel.

[0011] Optionally, a control valve group is provided at the inlet of the liquid nitrogen flow channel, the control valve group includes a regulating valve and a control unit, the control unit is electrically connected to the regulating valve, the flowmeter and the thermometer, and the regulating valve is provided at the inlet of the liquid nitrogen flow channel.

[0012] Optionally, the control valve group also includes a first cut-off valve, a second cut-off valve, a bypass valve and a vent valve, the first cut-off valve and the second cut-off valve are respectively arranged at both ends of the regulating valve, and both ends of the bypass valve are respectively connected to one end of the first cut-off valve and the second cut-off valve away from the regulating valve; one end of the vent valve is connected between the regulating valve and the first cut-off valve or the second cut-off valve, and the other end of the vent valve is vented.

[0013] Optionally, a cooling fan, a water retainer, a water distribution tray and a cooling filler are provided in the cooling tower body; the water retainer and the cooling fan are located successively on the upper side of the spray component; the cooling filler and the water distribution tray are located successively on the upper side of the water collecting trough; an air inlet is opened on the cooling tower body between the cooling filler and the water collecting trough.

[0014] Optionally, the liquid nitrogen flow channel includes a plurality of heat exchange pipes connected end to end in sequence, and the plurality of heat exchange pipes are arranged in an array; the heat exchange pipes are arranged in the cooling tower body, and the heat exchange pipes are located between the spray component and the water distribution tray.

[0015] Optionally, heat exchange fins are sequentially arranged at intervals on the heat exchange pipe, an angle is formed between the heat exchange fins and the heat exchange pipe, and the directions of the heat exchange fins on the upper and lower adjacent heat exchange pipes are opposite.

[0016] Optionally, the inlet of the liquid nitrogen flow channel is located at one side of the bottom of the liquid nitrogen flow channel.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a liquid nitrogen vaporizer coupled cooling tower, which cleverly couples the liquid nitrogen vaporizer into the cooling tower, collects the cold energy emitted by the liquid nitrogen vaporizer and uses it to cool the circulating water of the cooling tower, while improving the liquid nitrogen gasification effect, reducing the workload of the original cooling tower, achieving the effect of energy saving and environmental protection; the temperature of the saturated hot and humid air flow in the cooling tower body drops when passing through the liquid nitrogen flow path, and part of the water vapor condenses back into the tower, reducing the evaporation loss of the cooling tower and saving water consumption. The circulating water is transmitted by spraying components, so that the liquid nitrogen flow path is heated comprehensively and evenly, improving the heat exchange effect; the heat exchange effect is further improved by arranging the spray pipe and the heat exchange pipe in an array; the flow of the liquid nitrogen flow path is controlled by the control valve group according to the flow and temperature of the circulating water flow path, ensuring that the cold and heat exchange are matched with each other and ensuring the gasification effect; by arranging heat exchange fins on the heat exchange pipe, on the one hand, the heat exchange area of ​​the heat exchange pipe is increased, and at the same time, the passing flow rate of the circulating water can be adjusted, thereby further improving the heat exchange effect and ensuring sufficient liquid nitrogen gasification. In summary, the utility model can achieve the technical effects of sufficient liquid nitrogen gasification and energy and water saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a liquid nitrogen gasifier coupled cooling tower provided by the utility model;

[0020] Figure 2 It is a schematic diagram of an array arrangement of two rows and two columns provided by the utility model;

[0021] Figure 3 It is a structural schematic diagram of the control valve group provided by the utility model;

[0022] Figure 4 It is a structural schematic diagram of the liquid nitrogen flow channel provided by the utility model;

[0023] The markings in the figure are:

[0024] 1-circulating water flow channel; 11-spraying parts; 111-spraying pipe; 112-spraying head; 12-water collecting tank; 13-return water flow channel; 131-flow meter; 132-thermometer; 133-water pump; 134-water-using equipment;

[0025] 2-liquid nitrogen flow channel; 21-heat exchange pipe; 22-heat exchange fins;

[0026] 3-cooling tower body; 31-cooling fan; 32-water retainer; 33-water distribution tray; 34-cooling filler; 35-air inlet;

[0027] 4-control valve group; 41-regulating valve; 42-control unit; 43-first shut-off valve; 44-second shut-off valve; 45-bypass valve; 46-vent valve. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0029] Embodiment 1:

[0030] like Figure 1 As shown, an embodiment of the utility model provides a liquid nitrogen vaporizer coupled cooling tower, comprising a circulating water flow channel 1, a liquid nitrogen flow channel 2 and a cooling tower body 3. The liquid nitrogen flow channel 2 passes through the circulating water flow channel 1, and the liquid nitrogen in the liquid nitrogen flow channel 2 absorbs heat and completes vaporization when passing through the circulating water flow channel 1.

[0031] The cooling tower also includes a cooling tower body 3; the circulating water flow channel 1 includes a spray component 11, a water collecting tank 12 and a return water flow channel 13. The spray component 11 and the water collecting tank 12 are arranged in the cooling tower body 3, and the spray component 11 is located on the upper side of the water collecting tank 12; the two ends of the return water flow channel 13 are respectively connected to the inlet of the spray component 11 and the outlet of the water collecting tank 12. The spray component 11 is used to contact the circulating water in the circulating water flow channel 1 with the liquid nitrogen flow channel 2 in a spraying manner, which can ensure that the circulating water is evenly distributed on the liquid nitrogen flow channel 2, thereby increasing the heat exchange area and uniformity.

[0032] The spraying component 11 includes a plurality of spraying pipes 111 connected end to end in sequence, and the plurality of spraying pipes 111 are arranged in an array, and spray heads 112 are sequentially arranged at intervals at the bottom of each spraying pipe 111. The array arrangement generally includes a plurality of rows and columns, such as Figure 2 As shown, it is a schematic diagram of an array arrangement of two rows and two columns. Specifically in this embodiment, multiple spray pipes 111 are set to 1 row and N columns. The value of N can be set according to actual needs. The single-layer multi-column structure can ensure that the spraying of the spray head 112 is more uniform.

[0033] The return water channel 13 is provided with a flow meter 131, a thermometer 132, a water pump 133 and a water-using device 134. The flow meter 131 and the thermometer 132 are provided at the outlet of the return water channel 13. The flow meter 131 and the thermometer 132 can monitor the outlet flow and temperature of the return water channel 13 in real time, so that the staff can understand its working status. The water-using device 134 is used as the source of heat for the circulating water, and the water-using device 134 is usually provided downstream of the water pump 133.

[0034] like Figure 3As shown, the inlet of the liquid nitrogen flow channel 2 is provided with a control valve group 4, which includes a regulating valve 41 and a control unit 42. The control unit 42 is electrically connected to the regulating valve 41, the flow meter 131 and the thermometer 132. The regulating valve 41 is arranged at the inlet of the liquid nitrogen flow channel 2. The control unit 42 can adopt a common single-chip microcomputer, and control the regulating valve 41 by collecting signals from the flow meter 131 and the thermometer 132 to form a closed-loop feedback regulation. Specifically in this embodiment, the control logic is:

[0035] O=k*Q*T

[0036] In the formula, O is the opening value of the regulating valve, k is the coefficient constant value, Q is the flow value obtained by the flow meter, and T is the temperature value obtained by the thermometer.

[0037] Through the above-mentioned closed-loop feedback regulation, it can be ensured that the liquid nitrogen in the liquid nitrogen flow channel 2 can be fully heated and vaporized, thereby avoiding the problem of insufficient vaporization due to insufficient heating capacity of the circulating water flow channel 1.

[0038] In addition, the control valve group 4 also includes a first cut-off valve 43, a second cut-off valve 44, a bypass valve 45 and a vent valve 46. The first cut-off valve 43 and the second cut-off valve 44 are respectively arranged at both ends of the regulating valve 41, and both ends of the bypass valve 45 are respectively connected to the first cut-off valve 43 and the second cut-off valve 44 at one end away from the regulating valve 41; one end of the vent valve 46 is connected between the regulating valve 41 and the first cut-off valve 43 or the second cut-off valve 44, and the other end of the vent valve 46 is vented.

[0039] The inlet of the liquid nitrogen flow channel 2 is usually directly connected to the liquid nitrogen storage tank, and the liquid nitrogen is discharged by the internal pressure of the liquid nitrogen storage tank. At this time, the pressure in the liquid nitrogen flow channel 2 is relatively high; if the regulating valve 41 fails, it is difficult to repair or replace. By setting the above-mentioned valves, when the regulating valve 41 needs to be repaired or replaced, the first cut-off valve 43 and the second cut-off valve 44 are turned off, and the bypass valve 45 is opened at the same time. At this time, the liquid nitrogen in the liquid nitrogen storage tank enters the liquid nitrogen flow channel 2 through the bypass valve 45 to ensure that the liquid nitrogen flow channel 2 can continue to work normally; after that, the vent valve 46 is opened to discharge the nitrogen between the first cut-off valve 43 and the second cut-off valve 44, and the pressure is reduced to zero. At this time, the regulating valve 41 can be safely repaired or replaced. After repair or replacement, the bypass valve 45 and the vent valve 46 are closed, and the first cut-off valve 43 and the second cut-off valve 44 are opened.

[0040] A cooling fan 31, a water retainer 32, a water distribution tray 33 and a cooling filler 34 are provided in the cooling tower body 3. The water retainer 32 and the cooling fan 31 are located on the upper side of the spray component 11 in sequence, and the cooling filler 34 and the water distribution tray 33 are located on the upper side of the water collecting tank 12 in sequence; an air inlet 35 is opened on the cooling tower body 3 between the cooling filler 34 and the water collecting tank 12.

[0041] The cooling fan 31 drives the outside air into the cooling tower body 3 from the air inlet 35, exchanges heat with the circulating water left by the upper spray component 11 in the cooling filler 34 (the circulating water enters the cooling filler 34 evenly through the water distribution tray 33) and takes away the evaporated water vapor. After the heat exchange, the humid hot water vapor goes up to the liquid nitrogen flow channel 2 and contacts it. The temperature drops, causing part of the water vapor to condense and fall, which plays a role in water saving and mist elimination; the uncondensed water vapor passes through the water retainer 32 and is discharged through the cooling fan 31. The water retainer 32 can adopt the common wet film water retainer or aluminum alloy water retaining plate on the market, and the cooling filler 34 can adopt the common PVC honeycomb filler on the market.

[0042] The liquid nitrogen flow channel 2 includes a plurality of heat exchange pipes 21 connected end to end in sequence, and the plurality of heat exchange pipes 21 are arranged in an array; the heat exchange pipes 21 are arranged in the cooling tower body 3, and the heat exchange pipes 21 are located between the spray component 11 and the water distribution tray 33. The array arrangement usually includes multiple rows and columns, such as Figure 2 As shown, it is a schematic diagram of an array arrangement of two rows and two columns. Specifically in this embodiment, multiple heat exchange pipes 21 are set to M rows and P columns. The values ​​of M and P can be set according to actual needs. The multi-layer structure increases the heat exchange area of ​​the liquid nitrogen flow channel 2, thereby improving the gasification effect of liquid nitrogen. At the same time, the inlet of the liquid nitrogen flow channel 2 is located at the bottom side of the liquid nitrogen flow channel 2, that is, the bottom row. The liquid nitrogen in the liquid nitrogen channel 2 flows from bottom to top, which can reduce its flow rate and further improve the gasification effect.

[0043] like Figure 4 As shown, heat exchange fins 22 are sequentially arranged on the heat exchange pipe 21 at intervals, and there is an angle between the heat exchange fins 22 and the heat exchange pipe 21, and the heat exchange fins 22 on the upper and lower adjacent heat exchange pipes 21 are in opposite directions. By setting in the opposite direction, the flow rate of the circulating water through the multi-layer structure can be controlled to ensure sufficient heat exchange time. The spacing, area and inclination of each layer of heat exchange fins 22 can also be adjusted according to actual needs, such as the spacing of the lower layer fins is larger, the area and inclination of a single fin are relatively large, and they decrease layer by layer from bottom to top, so that the flow rate of the circulating water is slow at the top and fast at the bottom, thereby improving the heat exchange efficiency at the inlet of the liquid nitrogen flow channel 2 and improving the gasification effect of liquid nitrogen.

[0044] The present embodiment provides a liquid nitrogen vaporizer coupled cooling tower, which cleverly couples the liquid nitrogen vaporizer into the cooling tower. The cooling tower can be a lithium battery cooling tower required in the lithium battery production process, which takes away the heat generated in the lithium battery production. While improving the liquid nitrogen gasification effect, the heat generated in the lithium battery production process is reused, thereby reducing the workload of the original lithium battery cooling tower. At the same time, the temperature of the saturated hot and humid air flow in the cooling tower drops when passing through the vaporizer, and part of the water vapor is condensed back into the tower, thereby reducing the evaporation loss of the cooling tower and saving water consumption. The overall effect of energy saving and environmental protection is achieved.

[0045] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A liquid nitrogen gasifier coupled cooling tower, characterized in that: include: Circulating water flow channel (1); A liquid nitrogen flow channel (2), the liquid nitrogen flow channel (2) passing through the circulating water flow channel (1), the liquid nitrogen in the liquid nitrogen flow channel (2) absorbing heat and completing gasification when passing through the circulating water flow channel (1); The cooling tower further comprises a cooling tower body (3); the circulating water flow channel (1) comprises a spray component (11), a water collecting tank (12) and a return water flow channel (13); the spray component (11) and the water collecting tank (12) are arranged in the cooling tower body (3), and the spray component (11) is located on the upper side of the water collecting tank (12); two ends of the return water flow channel (13) are respectively connected to the inlet of the spray component (11) and the outlet of the water collecting tank (12); The spray component (11) comprises a plurality of spray pipes (111) connected end to end in sequence, the plurality of spray pipes (111) being arranged in an array, and spray heads (112) being sequentially arranged at intervals at the bottom of each of the spray pipes (111); a flow meter (131), a thermometer (132), a water pump (133) and a water-using device (134) are arranged on the return water flow channel (13), and the flow meter (131) and the thermometer (132) are arranged at the outlet of the return water flow channel (13); A control valve group (4) is provided at the inlet of the liquid nitrogen flow channel (2), the control valve group (4) comprising a regulating valve (41) and a control unit (42), the control unit (42) being electrically connected to the regulating valve (41), the flow meter (131) and the thermometer (132), and the regulating valve (41) is provided at the inlet of the liquid nitrogen flow channel (2); The liquid nitrogen flow channel (2) comprises a plurality of heat exchange pipes (21) connected end to end in sequence, heat exchange fins (22) are sequentially arranged at intervals on the heat exchange pipes (21), an angle is formed between the heat exchange fins (22) and the heat exchange pipes (21), and the heat exchange fins (22) on the upper and lower adjacent heat exchange pipes (21) are oriented in opposite directions.

2. The liquid nitrogen gasifier coupled cooling tower according to claim 1, characterized in that: The control valve group (4) further comprises a first shut-off valve (43), a second shut-off valve (44), a bypass valve (45) and a vent valve (46); the first shut-off valve (43) and the second shut-off valve (44) are respectively arranged at two ends of the regulating valve (41); two ends of the bypass valve (45) are respectively connected to one end of the first shut-off valve (43) and the second shut-off valve (44) away from the regulating valve (41); one end of the vent valve (46) is connected between the regulating valve (41) and the first shut-off valve (43) or the second shut-off valve (44), and the other end of the vent valve (46) is vented.

3. The liquid nitrogen gasifier coupled cooling tower according to claim 1, characterized in that: The cooling tower body (3) is provided with a cooling fan (31), a water retainer (32), a water distribution tray (33) and a cooling filler (34); the water retainer (32) and the cooling fan (31) are located on the upper side of the spray component (11) in sequence, and the cooling filler (34) and the water distribution tray (33) are located on the upper side of the water collecting trough (12) in sequence; an air inlet (35) is provided on the cooling tower body (3) between the cooling filler (34) and the water collecting trough (12).

4. The liquid nitrogen gasifier coupled cooling tower according to claim 3, characterized in that: The plurality of heat exchange pipes (21) are arranged in an array; the heat exchange pipes (21) are arranged in the cooling tower body (3), and the heat exchange pipes (21) are located between the spray component (11) and the water distribution tray (33).

5. The liquid nitrogen gasifier coupled cooling tower according to claim 1, characterized in that: The inlet of the liquid nitrogen flow channel (2) is located at one side of the bottom of the liquid nitrogen flow channel (2).

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