Spiral heat exchanger with inner channel and outer channel

Abstract

The spiral heat exchanger with the inner channel and the outer channel comprises a cooling liquid downstream sleeve, a cooling liquid countercurrent pipeline is arranged in the cooling liquid downstream sleeve in a penetrating mode, and a spiral baffle is arranged between the inner wall of the cooling liquid downstream sleeve and the outer wall of the cooling liquid countercurrent pipeline. A cylindrical compressed hydrogen spiral partition plate is arranged between the spiral baffles in a penetrating mode, the compressed hydrogen spiral partition plate is located between the cooling liquid downstream sleeve and the cooling liquid reverse flow pipeline, and a cooling liquid downstream pipeline is formed among the compressed hydrogen spiral partition plate, the cooling liquid downstream sleeve and the spiral baffles. And a high-temperature compressed hydrogen pipeline is formed among the compressed hydrogen spiral partition plate, the cooling liquid reverse flow pipeline and the spiral baffle. According to the utility model, the cooling liquid in the inner layer and the cooling liquid in the outer layer are respectively subjected to heat exchange with hydrogen in countercurrent and down-current modes, and meanwhile, the spiral pipeline design is utilized, so that the heat exchange area and the hydrogen retention time are effectively prolonged, and the heat exchange efficiency is improved on the premise of ensuring the safety.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically to an inner-outer double-channel spiral heat exchanger. Background Art

[0002] As a sustainable clean energy, hydrogen is considered to be one of the ideal substitutes for traditional fossil fuels and has huge market potential in the fields of energy, transportation, and industrial production. The hydrogen energy industry chain mainly includes the production, storage, transportation, and application of hydrogen, among which safe and efficient hydrogen storage and transportation is the key link in the development of the hydrogen energy industry chain.

[0003] At present, most hydrogen storage and transportation modes use low-pressure gaseous transportation. When hydrogen enters the compressor from the hydrogen source and is pressurized by the compressor, the temperature of the hydrogen rises due to volume compression. Since the hydrogen storage tank does not take insulation measures, the tank will naturally cool down in the environment during the filling process, and will continue to cool down to room temperature after the filling is completed. This will cause the actual filling volume to be lower than the theoretical filling volume. If the subsequent supplementary method is used, the filling risk will increase and there will be safety hazards. Before filling, the compressed hydrogen is safely and efficiently heat exchanged to bring it to room temperature, which can more effectively increase the single hydrogen transportation volume and eliminate the safety hazards caused by secondary filling, while also achieving the purpose of reducing transportation costs.

[0004] In addition, the existing heat exchangers for hydrogen have low heat exchange efficiency and cannot reduce the high-temperature hydrogen to room temperature in a short time. When it is filled into the storage tank, the tank temperature rises and then slowly exchanges heat with the air. This will reduce the actual filling volume and increase the storage and transportation costs of hydrogen. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an inner and outer double-channel spiral heat exchanger to improve the hydrogen heat exchange efficiency and reduce the temperature of compressed hydrogen, thereby increasing the single storage and transportation volume and reducing the hydrogen storage and transportation cost.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present utility model are as follows.

[0007] An inner and outer double-channel spiral heat exchanger comprises a coolant downstream sleeve, a coolant countercurrent pipeline is provided in the coolant downstream sleeve, a spiral baffle is provided between the inner wall of the coolant downstream sleeve and the outer wall of the coolant countercurrent pipeline; a cylindrical compressed hydrogen spiral partition is provided between the spiral baffles, the compressed hydrogen spiral partition is located between the coolant downstream sleeve and the coolant countercurrent pipeline, a coolant downstream pipeline is formed between the compressed hydrogen spiral partition, the coolant downstream sleeve and the spiral baffle, and a high-temperature compressed hydrogen pipeline is formed between the compressed hydrogen spiral partition, the coolant countercurrent pipeline and the spiral baffle.

[0008] To further optimize the technical solution, a coolant downstream inlet is provided on the right side of the coolant downstream pipeline, and a coolant downstream outlet is provided on the left side of the coolant downstream pipeline; a high-temperature compressed hydrogen inlet is provided on the left side of the high-temperature compressed hydrogen pipeline, and a high-temperature compressed hydrogen outlet is provided on the right side of the high-temperature compressed hydrogen pipeline; a coolant countercurrent inlet is provided on the left side of the coolant countercurrent pipeline, and a coolant countercurrent outlet is provided on the right side of the coolant countercurrent pipeline.

[0009] To further optimize the technical solution, the spiral baffle is fixed to the compressed hydrogen spiral partition and the coolant downstream sleeve by welding.

[0010] To further optimize the technical solution, the spiral baffle is fixed to the compressed hydrogen spiral partition and the coolant countercurrent pipeline by welding.

[0011] To further optimize the technical solution, the coolant downstream sleeve, spiral baffle and compressed hydrogen spiral partition are all made of 15CrMoR (H) steel for medium-temperature hydrogen-resistant pressure vessels.

[0012] To further optimize the technical solution, the coolant countercurrent pipeline is made of 316 stainless steel.

[0013] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0014] The utility model provides an inner and outer double-channel spiral heat exchanger, which exchanges heat with hydrogen in a countercurrent and cocurrent manner through the inner and outer layers of coolant, respectively, and at the same time utilizes the design of the spiral pipeline to effectively extend the heat exchange area and the hydrogen retention time. The dual-channel heat exchange method can effectively avoid deformation of the heat exchanger caused by high and low temperature differences, thereby improving the heat exchange efficiency while ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Among them: 1. Coolant downstream sleeve, 2. Coolant downstream inlet, 3. Coolant downstream outlet, 4. High-temperature compressed hydrogen inlet, 5. Low-temperature compressed hydrogen outlet, 6. Coolant countercurrent inlet, 7. Coolant countercurrent outlet, 8. Spiral baffle, 9. Compressed hydrogen spiral partition, 10. Coolant countercurrent pipeline. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] An internal and external double-channel spiral heat exchanger, combined Figure 1As shown, it includes a coolant downstream sleeve 1, a spiral baffle 9, a compressed hydrogen spiral baffle 9 and a coolant counterflow pipeline 10. The coolant counterflow pipeline 10 is penetrated in the coolant downstream sleeve 1, and the spiral baffle 8 is arranged between the inner wall of the coolant downstream sleeve 1 and the outer wall of the coolant counterflow pipeline 10. The compressed hydrogen spiral baffle 9 is a cylindrical structure and is penetrated between the spiral baffles 8. The compressed hydrogen spiral baffle 9 is located between the coolant downstream sleeve 1 and the coolant counterflow pipeline 10.

[0019] The compressed hydrogen spiral partition 9 is fixed to the coolant downstream sleeve 1 and the spiral baffle 8 by welding to form a coolant downstream pipeline. The compressed hydrogen spiral partition 9 is fixed to the coolant countercurrent pipeline 10 and the spiral baffle 8 by welding to form a high-temperature compressed hydrogen pipeline.

[0020] A coolant downstream inlet 2 is provided on the right side of the coolant downstream pipeline, and a coolant downstream outlet 3 is provided on the left side of the coolant downstream pipeline. The coolant enters from the coolant downstream inlet 2, and flows out from the coolant downstream outlet 3 after heat exchange in the coolant downstream pipeline.

[0021] A high-temperature compressed hydrogen inlet 4 is arranged on the left side of the high-temperature compressed hydrogen pipeline, and a high-temperature compressed hydrogen outlet 5 is arranged on the right side of the high-temperature compressed hydrogen pipeline. The high-temperature compressed hydrogen enters from the high-temperature compressed hydrogen inlet 4, and is discharged from the high-temperature compressed hydrogen outlet 5 after heat exchange in the high-temperature compressed hydrogen pipeline.

[0022] A coolant countercurrent inlet 6 is provided on the left side of the coolant countercurrent pipe 10, and a coolant countercurrent outlet 7 is provided on the right side of the coolant countercurrent pipe 10. The coolant enters from the coolant countercurrent inlet 6, and flows out from the coolant countercurrent outlet 7 after heat exchange in the coolant countercurrent pipe.

[0023] The outer side heat exchange adopts the downstream method, which can effectively avoid the inconsistency of high and low temperature zones of the heat exchange equipment and improve the stability and durability of the heat exchanger. The inner center circular flow channel adopts the countercurrent method for heat exchange, which improves the heat exchange efficiency while ensuring safety, quickly cools the compressed hydrogen to room temperature, and increases the actual filling volume of the storage tank.

[0024] The coolant downstream sleeve 1, the spiral baffle 8 and the compressed hydrogen spiral partition 9 are all made of 15CrMoR (H) medium-temperature hydrogen-resistant pressure vessel steel with a thermal conductivity of 16-30W / (m·℃). The coolant countercurrent pipeline 10 is made of 316 stainless steel. At the same time, the insulation material with a thickness of 50-100mm polyurethane is laid on the entire outside of the heat exchanger.

[0025] The specific parameters of the heat exchanger are shown in the following table:

[0026]

Claims

1. An internal and external double-channel spiral heat exchanger, characterized in that: The invention comprises a cooling liquid downstream sleeve (1), a cooling liquid counterflow pipeline (10) is provided in the cooling liquid downstream sleeve (1), and a spiral baffle (8) is provided between the inner wall of the cooling liquid downstream sleeve (1) and the outer wall of the cooling liquid counterflow pipeline (10); a cylindrical compressed hydrogen spiral baffle (9) is provided between the spiral baffles (8), the compressed hydrogen spiral baffle (9) is located between the cooling liquid downstream sleeve (1) and the cooling liquid counterflow pipeline (10), a cooling liquid downstream pipeline is formed between the compressed hydrogen spiral baffle (9), the cooling liquid downstream sleeve (1) and the spiral baffle (8), and a high-temperature compressed hydrogen pipeline is formed between the compressed hydrogen spiral baffle (9), the cooling liquid counterflow pipeline (10) and the spiral baffle (8).

2. The inner and outer double-channel spiral heat exchanger according to claim 1, characterized in that: A coolant downstream inlet (2) is provided on the right side of the coolant downstream pipeline, and a coolant downstream outlet (3) is provided on the left side of the coolant downstream pipeline; a high-temperature compressed hydrogen inlet (4) is provided on the left side of the high-temperature compressed hydrogen pipeline, and a high-temperature compressed hydrogen outlet (5) is provided on the right side of the high-temperature compressed hydrogen pipeline; a coolant countercurrent inlet (6) is provided on the left side of the coolant countercurrent pipeline (10), and a coolant countercurrent outlet (7) is provided on the right side of the coolant countercurrent pipeline (10).

3. The inner and outer double-channel spiral heat exchanger according to claim 1, characterized in that: The spiral baffle (8), the compressed hydrogen spiral partition (9) and the coolant downstream sleeve (1) are fixed by welding.

4. The inner and outer double-channel spiral heat exchanger according to claim 1, characterized in that: The spiral baffle (8) is fixed to the compressed hydrogen spiral partition (9) and the coolant counterflow pipeline (10) by welding.

5. The inner and outer double-channel spiral heat exchanger according to claim 1, characterized in that: The cooling liquid downstream sleeve (1), the spiral baffle (8) and the compressed hydrogen spiral partition (9) are all made of 15CrMoR (H) steel for medium-temperature hydrogen-resistant pressure vessels.

6. The inner and outer double-channel spiral heat exchanger according to claim 1, characterized in that: The coolant counterflow pipeline (10) is made of 316 stainless steel.

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