Liquid nitrogen vaporization cold energy recovery system

Abstract

The utility model discloses a liquid nitrogen vaporization cold energy recovery system, which comprises a cooling tower, a liquid nitrogen evaporator, a liquid nitrogen evaporator, a liquid nitrogen evaporator and a liquid nitrogen evaporator, the fan is arranged at an air outlet of the cooling tower; the vaporizer is arranged at the air inlet of the cooling tower, and the vaporizer is higher than the cooling tower; the outer cover covers the periphery of the vaporizer to form a vaporization area communicated with the cooling tower; the housing has an inclined tapered section that matches the height difference between the vaporizer and the cooling tower. The liquid nitrogen vaporizer and the air compressor cooling tower are used in a combined mode, the cooling capacity generated when the vaporizer vaporizes is recycled, the cooling effect of the air compressor cooling tower is enhanced, and frosting on the surface of the vaporizer can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of air compression station in a battery power area, in particular to a liquid nitrogen vaporization cooling capacity recovery system. Background Art

[0002] During the production of lithium batteries, nitrogen and compressed air are required. To meet the actual production needs, compressed air is generally provided by an air compressor, and nitrogen is provided by a nitrogen generator and liquid nitrogen. During the vaporization process of liquid nitrogen, a large amount of heat is absorbed to form a strong cold layer on the surface of the vaporizer. When the ambient humidity is too high, the surface of the vaporizer begins to frost. Both the strong cold layer and frosting will affect the vaporization efficiency of the vaporizer. How to more conveniently solve the problem of reduced efficiency of the vaporizer due to frosting is the key to this utility model. Utility Model Content

[0003] The utility model aims to provide a liquid nitrogen vaporization cold recovery system to solve the problems raised in the above-mentioned background technology. The liquid nitrogen vaporizer and the air compressor cooling tower are used together, which not only recovers the cold during vaporization of the vaporizer to enhance the cooling effect of the air compressor cooling tower, but also reduces frost on the vaporizer surface.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] The utility model discloses a liquid nitrogen vaporization cold recovery system, comprising:

[0006] The cooling tower has multiple air inlets on its periphery and an air outlet on the top;

[0007] The fan is installed at the air outlet of the cooling tower;

[0008] A vaporizer is arranged at the air inlet of the cooling tower, and the height of the vaporizer is higher than the height of the cooling tower;

[0009] The outer cover is arranged on the outer periphery of the evaporator to form a evaporation zone connected with the cooling tower; the outer cover has an inclined tapered section matching the height difference between the evaporator and the cooling tower.

[0010] Furthermore: it also includes a transition air duct connected to the air outlet of the cooling tower, and the fan is arranged in the transition air duct.

[0011] Furthermore: the inner diameter of the waist of the transition air duct is smaller than the inner diameters of the two ends, and the two ends of the transition air duct smoothly transition to the side walls of the waist.

[0012] Furthermore: the height of the transition air duct is higher than the height of the outer cover.

[0013] Further: the outer cover is trumpet-shaped.

[0014] Further: there is a gap of at least cm between the outer cover and the vaporizer.

[0015] Furthermore: a maintenance platform is provided below the vaporization area, and both ends of the maintenance platform are connected to the vaporizer and the cooling tower.

[0016] Furthermore: it also includes a water collecting tank arranged below the cooling tower.

[0017] Furthermore: it also includes a bracket arranged at the bottom of the vaporizer.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model connects the vaporizer and the cooling tower by arranging them together. The gas flow in the cooling tower drives the cold air flow around the vaporizer, reduces the frost on the vaporizer surface, and avoids affecting the vaporization efficiency. At the same time, the cold gas generated by the vaporizer during vaporization can enhance the cooling effect of the cooling tower and reduce energy consumption. The flow direction of the vaporized cold gas is guided by a trumpet-shaped outer cover; a transition air duct is added to the exhaust port of the cooling tower, and the height of the transition air duct is higher than the height of the outer cover to avoid high-humidity exhaust air affecting the vaporization efficiency of the vaporizer. The utility model does not introduce other equipment in the entire new system. Only by modifying the equipment and adjusting the equipment layout can the efficiency of the liquid nitrogen vaporizer and the air compressor cooling tower be improved, thereby reducing the energy consumption of the system and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view of the utility model;

[0021] Figure 2 It is a top view of the utility model;

[0022] In the figure: 1-cooling tower, 2-evaporator, 3-outer cover, 31-tapered section, 4-evaporation zone, 5-transition air duct, 6-maintenance platform, 7-water collecting tank, 8-support. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0025] See also Figure 1-2 In this embodiment, a liquid nitrogen vaporization cooling recovery system includes a cooling tower 1, a vaporizer 2, and an outer cover 3, wherein:

[0026] The outer periphery of the cooling tower 1 is provided with a plurality of air inlets, and the top is provided with an air outlet; two vaporizers 2 are arranged at the air inlet of the cooling tower 1, and the height of the vaporizer 2 is higher than the height of the cooling tower 1; a trumpet-shaped outer cover 3 is provided on the outer periphery of the vaporizer 2 to form a vaporization zone 4 connected to the cooling tower 1; the outer cover 3 has an inclined tapered section 31 matching the height difference between the vaporizer 2 and the cooling tower 1. The vaporizer 2 is a liquid nitrogen vaporizer, which absorbs a large amount of heat during vaporization, and forms a cold air layer on the surface of the liquid nitrogen vaporizer. The fan at the top of the cooling tower 1 provides power to draw the high-temperature gas in the cooling tower 1 upward, and the cold gas in the vaporization zone 4 flows into the air inlet of the cooling tower 1 under the action of the pressure difference, taking away the cold air around the liquid nitrogen vaporizer, and cooling the cooling tower 1 at the same time. In addition, since the surface air flow of the liquid nitrogen vaporizer increases, the cold air cannot be enriched, which improves the vaporization efficiency.

[0027] Furthermore, the cooling tower 1 is a mechanical ventilation cooling tower, the material of the transition duct 5 is fiberglass, the inner diameter of the duct waist is smaller than the inner diameters at both ends, and the two ends of the transition duct 5 smoothly transition to the waist side walls, and the outer contour of the transition duct 5 further enhances the heat dissipation of the cooling tower 1.

[0028] Furthermore, the top height of the transition duct 5 is higher than that of the outer cover 3, so that the high-humidity air discharged from the transition duct 5 is kept away from the liquid nitrogen vaporizer to avoid affecting the vaporization efficiency. On the other hand, it is also more conducive to the heat dissipation of the cooling tower 1 itself.

[0029] Furthermore, the inclined tapered section 31 of the outer cover 3 allows the condensed water outside the cover to be collected and returned to the air compressor cooling tower 1, thereby reducing the water consumption of the cooling tower.

[0030] Furthermore, there is a gap of at least 1 cm between the outer cover 3 and the vaporizer 2 to ensure the lifting operation space of forklifts and other tools when the liquid nitrogen vaporizer is repaired. A water collecting tank 7 is provided under the cooling tower 1. An inspection platform 6 is provided under the vaporization area 4, and both ends of the inspection platform 6 are connected to the vaporizer 2 and the cooling tower 1. The height of the inspection platform 6 is flush with the upper edge of the water collecting tank 7, and the surface is provided with embossed anti-skid. The water inlet pipe, overflow pipe, drain pipe, and outlet pipe of the cooling tower 1 are all installed below the inspection platform 6. Pipeline inspection is completed below the inspection platform 6, and filler replacement is completed above the inspection platform 6.

[0031] Furthermore, a bracket 8 is provided at the bottom of the evaporator 2 for adjusting the height of the evaporator 2 and the cooling tower 1 so that the bottom of the evaporator 2 is flush with the bottom of the air inlet of the cooling tower 1 .

[0032] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A liquid nitrogen vaporization cooling energy recovery system, characterized in that: include: A cooling tower (1) is provided with a plurality of air inlets on its outer periphery and an air outlet on its top; A fan is arranged at the air outlet of the cooling tower (1); A vaporizer (2) is arranged at the air inlet of the cooling tower (1), and the height of the vaporizer (2) is higher than the height of the cooling tower (1); An outer cover (3) is arranged on the outer periphery of the evaporator (2) to form a evaporation zone (4) connected to the cooling tower (1); the outer cover (3) has an inclined tapered section (31) that matches the height difference between the evaporator (2) and the cooling tower (1).

2. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: It also comprises a transition air duct (5) connected to the air outlet of the cooling tower (1), and a fan is arranged in the transition air duct (5).

3. The liquid nitrogen vaporization cold recovery system according to claim 2, characterized in that: The inner diameter of the waist of the transition air duct (5) is smaller than the inner diameters of the two ends, and the two ends of the transition air duct (5) smoothly transition to the side walls of the waist.

4. The liquid nitrogen vaporization cold recovery system according to claim 2, characterized in that: The height of the transition air duct (5) is higher than the height of the outer cover (3).

5. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: The outer cover (3) is trumpet-shaped.

6. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: There is a gap of at least 1 cm between the outer cover (3) and the vaporizer (2).

7. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: A maintenance platform (6) is provided below the vaporization zone (4), and both ends of the maintenance platform (6) are connected to the vaporizer (2) and the cooling tower (1).

8. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: It also includes a water collecting tank (7) arranged below the cooling tower (1).

9. The liquid nitrogen vaporization cold recovery system according to claim 1, characterized in that: It also includes a bracket (8) arranged at the bottom of the vaporizer (2).

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