CN220870613U

CN220870613U - Liquid nitrogen cold energy recovery device

Info

Publication number: CN220870613U
Application number: CN202322439863.6U
Authority: CN
Inventors: 罗世国
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-04-30
Anticipated expiration: 2033-09-07

Abstract

The utility model discloses a liquid nitrogen cold recovery device, which comprises a liquid nitrogen storage tank, wherein an air outlet of the liquid nitrogen storage tank is connected with a water bath vaporization unit and a vaporizer in parallel, the air outlets of the water bath vaporization unit and the vaporizer are connected to the upstream of a control valve group in a combined way, and the downstream of the control valve group is connected with a flowmeter and a nitrogen tank in series in sequence; the water bath vaporization unit comprises a water path and a gas path; the inlet of the waterway is communicated with the water collector, and the outlet of the waterway is communicated with the water separator; and an inlet of the gas circuit is communicated with the liquid nitrogen storage tank, and an outlet of the gas circuit is communicated with the control valve group. The utility model utilizes the cold energy of liquid nitrogen to cool water through the water bath vaporization unit, and fully utilizes the cold energy of liquid nitrogen.

Description

Liquid nitrogen cold energy recovery device

Technical Field

The utility model relates to the technical field of chilled water generation devices, in particular to a liquid nitrogen cold energy recovery device.

Background

At present, a large amount of nitrogen (including rare gas) is needed in the electronic and lithium battery industries, the electronic industry mainly uses voltage gas in a tank short-circuiting device, a large-scale integrated circuit and protective gas for manufacturing semiconductors and electric appliances, and the electronic industry mainly uses the protective gas in the lithium battery industry, and laser welding and the like, although liquid nitrogen is widely applied and practical in the electronic and lithium battery industries, most of the liquid nitrogen adopts an air vaporizer to convert liquid gas into gaseous gas, but a large amount of cold is directly discharged into the air in the liquid nitrogen vaporization process, so that the surface of the cold vaporizer is attached with ice blocks for condensing moisture in the air, a large amount of cold is wasted into the atmosphere, and resources are wasted.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: how to realize the effective utilization of the cold energy generated in the liquid nitrogen vaporization process.

In order to solve the technical problems, the utility model provides the following technical scheme:

The liquid nitrogen cold energy recovery device comprises a liquid nitrogen storage tank, wherein an air outlet of the liquid nitrogen storage tank is connected with a water bath vaporization unit and a vaporizer in parallel, an air outlet of the water bath vaporization unit and an air outlet of the vaporizer are connected to the upstream of a control valve group in a combined mode, and a flowmeter and a nitrogen tank are connected to the downstream of the control valve group in series in sequence; the water bath vaporization unit comprises a water path and a gas path; the inlet of the waterway is communicated with the water collector, and the outlet of the waterway is communicated with the water separator; and an inlet of the gas circuit is communicated with the liquid nitrogen storage tank, and an outlet of the gas circuit is communicated with the control valve group. According to the utility model, water enters the inner cavity of the box body through the backwater pressure of the water collector, the temperature probe detects the water temperature, if the water temperature meets the chilled water requirement, the liquid in the inner cavity of the box body is pumped by the water pump, pumped into the inner cavity of the water separator and provided for other equipment to use, if the water temperature does not meet the chilled water requirement, the liquid in the inner cavity of the liquid nitrogen storage tank enters the inner cavity of the box body from the air inlet of the vaporizing device and is discharged into the inner cavity of the nitrogen tank from the air outlet of the vaporizing device, a large amount of cold is absorbed in the process of liquid nitrogen to nitrogen, and the liquid in the inner cavity of the box body absorbs a large amount of cold at the same time until the chilled water temperature is reached, and the liquid in the inner cavity of the box body is pumped into the inner cavity of the water separator by the water pump, so that the water separator is provided for other equipment to use.

Further, the water bath vaporization unit comprises a box body and a vaporization device, and the vaporization device is positioned in the box body; an inlet and an outlet of the vaporizing device pass through the box body and are respectively communicated with a liquid nitrogen storage tank and a control valve group; the area except the vaporizing device in the inner cavity of the box body is a waterway, and an inlet and an outlet of the waterway are formed in the wall of the box body.

Further, the inner cavity of the box body is horizontally and fixedly connected with a plurality of partition boards, and through holes are formed in the relative positions of the tail ends of every two adjacent partition boards.

Furthermore, the water inlet pipe and the water outlet pipe are fixed with temperature probes.

Furthermore, a water level probe is also arranged in the box body.

Further, the vaporization device is fixed in the box body through a fixed bracket.

Furthermore, the control valve group comprises two pipelines which are connected in parallel and are mutually standby.

Furthermore, the inlet and the outlet of the vaporizer are provided with electromagnetic valves.

Further, the liquid inlet and outlet, liquid nitrogen inlet and nitrogen outlet of the water bath vaporization unit are all provided with electromagnetic valves

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, water enters the inner cavity of the box body through the backwater pressure of the water collector, the temperature probe detects the water temperature, if the water temperature meets the chilled water requirement, the liquid in the inner cavity of the box body is pumped by the water pump, pumped into the inner cavity of the water separator and provided for other equipment to use, if the water temperature does not meet the chilled water requirement, the liquid in the inner cavity of the liquid nitrogen storage tank enters the inner cavity of the box body from the air inlet of the vaporizing device and is discharged into the inner cavity of the nitrogen tank from the air outlet of the vaporizing device, a large amount of cold is absorbed in the process of liquid nitrogen to nitrogen, and the liquid in the inner cavity of the box body absorbs a large amount of cold at the same time until the chilled water temperature is reached, and the liquid in the inner cavity of the box body is pumped into the inner cavity of the water separator by the water pump, so that the water separator is provided for other equipment to use.

Two paths of the control valve group are two standby paths, so that the equipment can be ensured not to stop when one pipeline is abnormal.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a liquid nitrogen cold recovery device in an embodiment of the utility model;

Fig. 2 is a schematic diagram showing a front cross-sectional view of the overall structure of a water bath vaporization unit of a liquid nitrogen cold recovery device according to an embodiment of the present utility model.

In the figure: 1-a liquid nitrogen storage tank; 2-piping; 3-a water bath vaporization unit; 31-a box body; 32-a vaporization device; 33-water inlet pipe; 34-a water outlet pipe; 35-fixing a bracket; 36-a separator; 37-temperature probe; 38-an exhaust pipe; 39-water level probe; 4-controlling a valve group; 5-a flow meter; 6-nitrogen tank; 7-a water collector; 8-a water separator; 9-vaporizer.

Detailed Description

In order to facilitate the understanding of the technical scheme of the present utility model by those skilled in the art, the technical scheme of the present utility model will be further described with reference to the accompanying drawings.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Referring to fig. 1, the embodiment discloses a liquid nitrogen cold energy recovery device, which comprises a liquid nitrogen storage tank 1, a pipeline 2, a water bath vaporization unit 3, a control valve group 4, a flowmeter 5, a nitrogen tank 6, a water collector 7, a water separator 8 and a vaporizer 9.

Referring to fig. 1, an air outlet of a liquid nitrogen storage tank 1 is connected with a water bath vaporization unit 3 and a vaporizer 9 in parallel through a pipeline 2, exhaust ports of the water bath vaporization unit 3 and the vaporizer are connected to the upstream of a control valve group 4 in a combined mode, and the downstream of the control valve group 4 is connected with a flowmeter 5 and a nitrogen tank 6 in series in sequence.

Referring to fig. 2, the water bath vaporization unit 3 includes a box 31, a vaporization device 32, a water inlet pipe 33, a water outlet pipe 34, a fixed support 35, a partition 36, a temperature probe 37, an exhaust pipe 38, and a water level probe 39, wherein the box 31 is of a rectangular cavity structure, the vaporization device 32 is fixedly installed in an inner cavity of the box 31, one end of the vaporization device 32 is communicated with an air inlet end penetrating through a side wall of the box 31, the air inlet end of the vaporization device 32 is communicated with the liquid nitrogen storage tank 1 through a pipeline 2, one side, far away from the air inlet end, of the vaporization device 32 is communicated with an air outlet end penetrating through the side wall of the box 31, and the air outlet end of the vaporization device 32 is communicated with the nitrogen storage tank 6 through a control valve group 4 and a flowmeter 5.

In this embodiment, heat insulation layers are laid on four walls of the inner cavity of the box 31, so that the temperature loss of the inner cavity of the box 31 is effectively prevented, and waste is caused.

The water inlet pipe 33 is located at the top wall of the box 31 and is communicated with the water collector 7, liquid enters the inner cavity of the box 31 by the backwater pressure of the water collector 7, the vaporizing device 32 is soaked, the water outlet pipe 34 is located below the side wall or the bottom wall of the box 31, in this embodiment, the water outlet pipe 34 is located below the side wall of the box 31, one end of the water outlet pipe 34 penetrates through the side wall of the box 31 and extends to the inner cavity of the box 31, the other end of the water outlet pipe 34 is communicated with the water separator 8 through a pipeline, and temperature probes 37 are arranged on the water inlet pipe 33 and the water outlet pipe 34 and are located on the pipe body outside the box 31 for detecting the water inlet temperature and the water outlet temperature.

In this embodiment, the liquid enters the inner cavity of the tank body 31 through the water collector 7, the temperature probe 37 detects the water temperature, if the water temperature meets the chilled water requirement, the liquid in the inner cavity of the tank body 31 is pumped by the water pump, pumped to the inner cavity of the water separator 8 and provided for other equipment, if the water temperature does not meet the chilled water requirement, the liquid in the inner cavity of the liquid nitrogen storage tank 1 enters the inner cavity of the tank body 31 from the air inlet of the vaporizing device 32 and is discharged to the inner cavity of the nitrogen tank 6 from the air outlet of the vaporizing device 32, the liquid in the inner cavity of the tank body 31 is cooled in the process of liquid nitrogen to nitrogen, and the liquid in the inner cavity of the tank body 31 is pumped to the inner cavity of the water separator 8 by the water pump, so that the water separator 8 is provided for other equipment, and the practicability of the application is effectively improved.

The fixed support 35 is provided with a plurality of groups of inner cavities which are fixedly arranged in the box body 31 and used for fixing the vaporizing device 32, so that the stability of the vaporizing device 32 in the inner cavities of the box body 31 is effectively improved. The fixing bracket 35 is of a conventional structure and will not be described in detail herein.

The baffle 36 is provided with a plurality of layers, the inner cavity of the box body 31 is divided into a plurality of layers by being horizontally arranged in the inner cavity of the box body 31, through holes are formed in the opposite positions of the tail ends of every two adjacent baffle 36, and liquid entering the inner cavity of the box body 31 through the water inlet pipe 33 falls down layer by layer in a step-shaped manner, so that the liquid can absorb cold more fully, and the practicability of the application is improved.

The exhaust pipe 38 is located the roof of box 31, and the one end of exhaust pipe 38 runs through the lateral wall of box 31 and extends to the inner chamber of box 31, and the other end communicates with the atmosphere, and the effectual pressure to the inside of box 31 releases, has improved the practicality of the application, still is fixed with water level detector 9 in box 31, and the effectual liquid to box 31 detects to effectively control the inflow.

In the embodiment, the inlet and outlet of the vaporizer 9 are respectively provided with an electromagnetic valve, and the liquid inlet and outlet, the liquid nitrogen inlet and the nitrogen outlet of the water bath vaporizing unit 3 are respectively provided with an electromagnetic valve, so that the on-off of a pipeline is realized by controlling the opening and closing of different electromagnetic valves.

Referring to fig. 1, the control valve group 4 includes two channels arranged in parallel, and the two channels are mutually standby so as to avoid that the operation of the equipment is affected by the pipeline fault.

The working principle of the embodiment is as follows: the staff starts the water collector 7 and makes its water inlet get into the inner chamber of the box 31 through the backwater pressure of the water collector 7, the temperature probe 37 detects the water temperature, if meet the chilled water requirement, the liquid in the inner chamber of the box 31 is pumped by the water pump, pump to the inner chamber of the water knockout drum 8 and provide for other apparatuses to use, if not meet, the liquid nitrogen in the inner chamber of the liquid nitrogen storage tank 1 enters the inner chamber of the box 31 from the air inlet of the vaporizing device 32 and is discharged to the inner chamber of the nitrogen tank 6 from the air outlet of the vaporizing device 32, absorb a large amount of cold energy in the process of liquid nitrogen to nitrogen, absorb a large amount of cold energy at the same time in the inner chamber of the box 31 until reaching the chilled water temperature, pump pumps the liquid in the inner chamber of the box 31 to the inner chamber of the water knockout drum 8, thus provide for other apparatuses to use. When the water bath vaporization unit 3 is maintained, the vaporizer 9 can be started to temporarily work, so that the practicability of the utility model is effectively improved, and the working efficiency is greatly improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

The above-described embodiments merely represent embodiments of the utility model, the scope of the utility model is not limited to the above-described embodiments, and it is obvious to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides a cold volume recovery unit of liquid nitrogen which characterized in that: the device comprises a liquid nitrogen storage tank (1), wherein a water bath vaporization unit (3) and a vaporizer (9) are connected in parallel to an air outlet of the liquid nitrogen storage tank (1), the air outlets of the water bath vaporization unit (3) and the vaporizer are connected to the upstream of a control valve group (4) in a combined mode, and a flowmeter (5) and a nitrogen tank (6) are connected in series to the downstream of the control valve group (4) in sequence; the water bath vaporization unit (3) comprises a water path and a gas path; the inlet of the waterway is communicated with the water collector (7), and the outlet of the waterway is communicated with the water separator (8); the inlet of the air channel is communicated with the liquid nitrogen storage tank (1), and the outlet of the air channel is communicated with the control valve group (4).

2. The liquid nitrogen cold recovery device according to claim 1, wherein: the water bath vaporization unit (3) comprises a box body (31) and a vaporization device (32), wherein the vaporization device (32) is positioned in the box body (31); an inlet and an outlet of the vaporizing device (32) pass through the box body (31) to be respectively communicated with the liquid nitrogen storage tank (1) and the control valve group (4); the inner cavity of the box body is a waterway except the vaporizing device (32), and an inlet and an outlet of the waterway are formed in the wall of the box body (31).

3. The liquid nitrogen cold recovery device according to claim 2, wherein: the inner cavity of the box body (31) is horizontally and fixedly connected with a plurality of partition boards (36), and through holes are formed in the opposite positions of the tail ends of every two adjacent partition boards (36).

4. A liquid nitrogen refrigeration recovery apparatus as recited in claim 2 or 3, wherein: a water inlet pipe (33) is arranged at the inlet of the waterway; an outlet pipe (34) is arranged at the outlet of the waterway; the water inlet pipe (33) and the water outlet pipe (34) are fixed with a temperature probe (37).

5. A liquid nitrogen refrigeration recovery apparatus as recited in claim 2 or 3, wherein: a water level probe (39) is also arranged in the box body (31).

6. A liquid nitrogen refrigeration recovery apparatus as recited in any one of claims 2 or 3, wherein: the vaporization device (32) is fixed in the box body (31) through a fixing bracket (35).

7. A liquid nitrogen refrigeration recovery apparatus according to any one of claims 1 to 3, wherein: the control valve group (4) comprises two pipelines which are connected in parallel and are mutually standby.

8. A liquid nitrogen refrigeration recovery apparatus according to any one of claims 1 to 3, wherein: electromagnetic valves are arranged at the inlet and the outlet of the vaporizer (9).

9. A liquid nitrogen refrigeration recovery apparatus according to any one of claims 1 to 3, wherein: electromagnetic valves are arranged at the liquid inlet and outlet, the liquid nitrogen inlet and the nitrogen outlet of the water bath vaporization unit (3).