A cooling device for reducing liquid carryover in hydrogen in refineries.

Abstract

This invention provides a cooling device for reducing liquid carryover in hydrogen in refineries, belonging to the technical field of cooling equipment. It solves the technical problem of hydrogen embrittlement of metallic materials under existing high-pressure hydrogen environments (such as 50MPa hydrogen storage tanks). The cooling device includes a cooling box with a water-cooled cavity inside. An air-cooled cylinder is fixed inside the water-cooled cavity, with its opening exposed on the top surface of the cooling box. A rotating rod is rotatably connected inside the air-cooled cylinder, and multiple exhaust fans are coaxially fixed to the rotating rod. Multiple annular pipes are fitted onto the outer wall of the air-cooled cylinder, with the inner and outer walls of each annular pipe fitting against the surface of the air-cooled cylinder. A connecting pipe is fixed between every two adjacent annular pipes. This invention achieves dual cooling capabilities of water cooling and air cooling, improving the cooling effect. Furthermore, by continuously cooling the hydrogen at a temperature higher than that at which hydrogen liquefaction occurs, it reduces the generation of liquid carryover in hydrogen.

Description

Technical Field

[0001] This utility model belongs to the field of cooling equipment technology, and relates to a hydrogen cooling device, particularly a cooling device for reducing the liquid carryover of hydrogen in refineries. Background Technology

[0002] Reducing the amount of liquid hydrogen is a key measure to ensure the safe and efficient operation of hydrogen energy systems. When liquid hydrogen mixes with gaseous hydrogen, if it leaks into a poorly ventilated environment, it can easily form a flammable gas mixture (explosion limits 4%-75%), which may cause deflagration when it comes into contact with a source of ignition.

[0003] A search revealed a Chinese patent document disclosing a device for extracting hydrogen from refinery tail gas and recovering LNG and LPG [Application No.: 202022469328.1; Publication No.: CN 213446209 U]. This device includes a compression system for compressing refinery tail gas, a drying and dehydration system for dehydrating the compressed tail gas, a heavy hydrocarbon scrubbing tower, and a cryogenic separation tank. The cryogenic separation tank includes a first heat exchanger, a second heat exchanger, a first separator, a second separator, and a distillation tower. By using separators to perform secondary gas-liquid separation treatment on the compressed, dried, dehydrated, washed, and cooled refinery tail gas at a specific operating temperature through the first and second separators, hydrogen is recovered. Then, through multiple gas-liquid separation treatments via the second separator and the distillation tower, LNG and LPG can be recovered in high yields. Using this invention to treat refinery tail gas not only makes full use of resources to produce high-value-added products and meets the requirements of reducing environmental pollution in chemical technology, but also fully recovers and utilizes the effective components in refinery tail gas, bringing considerable economic benefits to production enterprises.

[0004] Although this patent fully recovers and utilizes the effective components in refinery tail gas, bringing considerable economic benefits to production enterprises, under high-pressure hydrogen environments (such as 50MPa hydrogen storage tanks), metal materials are prone to hydrogen embrittlement. Cooling can reduce the activity of hydrogen atoms and reduce the risk of corrosion to materials, so it is necessary to cool the hydrogen gas. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a cooling device for reducing liquid carryover in hydrogen in refineries. The technical problem this invention aims to solve is: how to achieve dual cooling capabilities of water cooling and wind power to improve the cooling effect, and how to reduce the generation of liquid carryover in hydrogen by continuously cooling the hydrogen at a temperature higher than that at which hydrogen liquefaction occurs.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A cooling device for reducing liquid carryover in hydrogen in a refinery includes a cooling box with a water-cooled cavity inside. An air-cooled cylinder is fixed inside the water-cooled cavity, with its opening exposed on the top surface of the cooling box. A rotating rod is rotatably connected inside the air-cooled cylinder, and multiple exhaust fans are coaxially fixed to the rotating rod. Multiple annular pipes are fitted onto the outer wall of the air-cooled cylinder, with the inner and outer walls of each annular pipe fitting against the surface of the air-cooled cylinder. A connecting pipe is fixed between every two adjacent annular pipes, and the multiple connecting pipes are arranged in a staggered pattern from top to bottom. Multiple air inlets are fixed outside the cooling box, each communicating with the bottom of the air-cooled cylinder. An air inlet is fixed on the top surface of the cooling box, communicating with the uppermost annular pipe. An air outlet is fixed on the bottom surface of the cooling box, communicating with the lowermost annular pipe.

[0008] The working principle of this utility model is as follows: hydrogen can be injected into each annular pipe through the air inlet, and the contact between hydrogen and structure is improved through multiple annular pipes, providing a cooling effect. The path length of the hydrogen flow is increased by the staggered connecting pipes, further improving the cooling effect. In addition, multiple exhaust fans promote the circulation of external air and improve the heat dissipation effect, realizing the dual cooling capacity of water cooling and wind power, and improving the cooling effect.

[0009] The cooling box is fixed with an inlet port that connects to the water cooling chamber. A liquid pump is fixed inside the water cooling chamber. The cooling box is also fixed with an outlet port that connects to the water cooling chamber. The outlet port is connected to the output end of the liquid pump, and the input end of the liquid pump is located inside the water cooling chamber.

[0010] With the above structure, new water can be supplied to the water-cooling chamber through the water inlet interface, and the drainage function can be realized through the infusion pump, so as to realize the water flow and transportation capacity and maintain the water cooling effect.

[0011] The bottom of the water-cooled cavity is fixed with a baffle plate to the bottom surface of the air-cooled cylinder. A turbine is rotatably connected to the center of the bottom of the water-cooled cavity, and the turbine is coaxially fixedly connected to the bottom end of the rotating rod.

[0012] With the above structure, the impact of the water entering the turbine can be blocked by the baffle at the water inlet. This ensures that the turbine can only be driven to rotate when the infusion pump is running and the suction end of the infusion pump generates suction. After the turbine rotates, the rotating rod will rotate, and after the rotating rod rotates, multiple exhaust fans will rotate synchronously to achieve the air cooling effect.

[0013] The cooling box is made of aluminum alloy.

[0014] By adopting the above structure, the overall structural strength of the cooling box can be improved by using aluminum alloy.

[0015] The air inlet, air outlet, each annular pipe, and each connecting pipe are all made of stainless steel, and the inner walls of the air inlet, air outlet, each annular pipe, and each connecting pipe are electropolished.

[0016] The above structure allows for the use of stainless steel in high-purity hydrogen environments, improving overall operational stability.

[0017] Compared with existing technologies, this cooling device for reducing liquid carryover in refinery hydrogen has the following advantages:

[0018] 1. Hydrogen is injected into each annular pipe through the air inlet, and the contact between hydrogen and the structure is improved through multiple annular pipes to provide a cooling effect. The path length of the hydrogen flow is increased by the staggered arrangement of connecting pipes, which further improves the cooling effect.

[0019] 2. Multiple exhaust fans promote air circulation and improve heat dissipation, achieving dual cooling capabilities of water cooling and airflow, thus enhancing the cooling effect. Furthermore, by continuously cooling the hydrogen at a temperature higher than that at which hydrogen liquefaction occurs, the generation of liquid in the hydrogen is reduced. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of the cooling box in this utility model.

[0022] Figure 3 This is a three-dimensional structural diagram of the annular pipe in this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the water-cooling cavity in this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the bottom of the water-cooled cavity in this utility model.

[0025] In the diagram, 1. Cooling box; 2. Water-cooled chamber; 3. Air-cooled cylinder; 4. Rotating rod; 5. Exhaust fan; 6. Annular pipe; 7. Connecting pipe; 8. Air inlet; 9. Air inlet interface; 10. Air outlet interface; 11. Water inlet interface; 12. Infusion pump; 13. Water outlet interface; 14. Baffle; 15. Turbine. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figures 1-5As shown, a cooling device for reducing liquid carryover in hydrogen in a refinery includes a cooling box 1, a water-cooled chamber 2 inside the cooling box 1, an air-cooled cylinder 3 fixed inside the water-cooled chamber 2, the opening of the air-cooled cylinder 3 exposed on the top surface of the cooling box 1, and a rotating rod 4 rotatably connected inside the air-cooled cylinder 3. Multiple exhaust fans 5 are coaxially fixed on the rotating rod 4. Multiple annular pipes 6 are sleeved on the outer wall of the air-cooled cylinder 3. The inner and outer walls of each annular pipe 6 are in contact with the surface of the air-cooled cylinder 3. A connecting pipe 7 is fixed between every two adjacent annular pipes 6. The multiple connecting pipes 7 are arranged alternately from top to bottom. Multiple air inlets 8 are fixed outside the cooling box 1. Each air inlet 8 is connected to the bottom of the air-cooled cylinder 3. An air inlet 9 is fixed on the top surface of the cooling box 1 and is connected to the uppermost annular pipe 6. An air outlet 10 is fixed on the bottom surface of the cooling box 1 and is connected to the lowermost annular pipe 6.

[0028] Hydrogen can be injected into each annular pipe 6 through the air inlet 9, and the contact between hydrogen and structure can be improved through multiple annular pipes 6 to provide a cooling effect. The path length of the hydrogen flow can be increased through the staggered connecting pipes 7 to further improve the cooling effect. Furthermore, multiple exhaust fans 5 can promote the circulation of external air and improve the heat dissipation effect, thereby achieving dual cooling capabilities of water cooling and air cooling and improving the cooling effect.

[0029] A water inlet 11 is fixed to the outside of the cooling tank 1, which is connected to the water cooling chamber 2. A liquid pump 12 is fixed inside the water cooling chamber 2. A water outlet 13 is fixed to the outside of the cooling tank 1, which is connected to the water cooling chamber 2. The water outlet 13 is connected to the output end of the liquid pump 12, and the input end of the liquid pump 12 is located inside the water cooling chamber 2.

[0030] With the above structure, new water can be supplied to the water-cooling chamber 2 through the water inlet 11, and the drainage function can be realized through the liquid pump 12, so as to realize the water flow and transportation capacity and maintain the water cooling effect.

[0031] A baffle 14 is fixed to the bottom of the water-cooled cavity 2 and the bottom surface of the air-cooled cylinder 3. A turbine 15 is rotatably connected to the center of the bottom of the water-cooled cavity 2. The turbine 15 is coaxially fixedly connected to the bottom end of the rotating rod 4.

[0032] With the above structure, the baffle 14 can block the impact of the water entering the turbine 15 at the water inlet 11, so that the turbine 15 can only be driven to rotate when the infusion pump 12 is operating and the suction end of the infusion pump 12 generates suction. After the turbine 15 rotates, the rotating rod 4 will rotate. After the rotating rod 4 rotates, multiple exhaust fans 5 will rotate synchronously to achieve the air cooling effect.

[0033] Cooling box 1 is made of aluminum alloy.

[0034] By adopting the above structure, the overall structural strength of the cooling box 1 can be improved by using aluminum alloy.

[0035] The air inlet 9, air outlet 10, each annular pipe 6, and each connecting pipe 7 are all made of stainless steel, and the inner walls of the air inlet 9, air outlet 10, each annular pipe 6, and each connecting pipe 7 are electropolished.

[0036] The above structure allows for the use of stainless steel in high-purity hydrogen environments, improving overall operational stability.

[0037] The working principle of this utility model is as follows: Hydrogen gas is injected into each annular pipe 6 through the air inlet 9, and the contact between hydrogen gas and the structure is improved through multiple annular pipes 6, providing a cooling effect. The path length of the hydrogen gas flow is increased by the staggered connecting pipes 7, further improving the cooling effect. During the water circulation process, when the infusion pump 12 is operating, the suction end of the infusion pump 12 generates suction, which drives the turbine 15 to rotate. After the turbine 15 rotates, the rotating rod 4 will rotate. After the rotating rod 4 rotates, multiple exhaust fans 5 will rotate synchronously to achieve air cooling heat dissipation. This achieves dual cooling capabilities of water cooling and air cooling, improving the cooling effect.

[0038] In summary, hydrogen is injected into each annular pipe 6 through the air inlet 9, and the contact between hydrogen and the structure is improved through multiple annular pipes 6, providing a cooling effect. The path length of the hydrogen flow is increased through the staggered connecting pipes 7, further improving the cooling effect. In addition, multiple exhaust fans 5 promote the circulation of external air and improve the heat dissipation effect, realizing the dual cooling capacity of water cooling and air cooling, and improving the cooling effect.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A cooling device for reducing liquid carryover in hydrogen in a refinery, comprising a cooling tank (1) and a water-cooled cavity (2) within the cooling tank (1), characterized in that, An air-cooled cylinder (3) is fixed inside the water-cooled cavity (2). The opening of the air-cooled cylinder (3) is exposed on the top surface of the cooling box (1). A rotating rod (4) is rotatably connected inside the air-cooled cylinder (3). Multiple exhaust fans (5) are coaxially fixed on the rotating rod (4). Multiple annular pipes (6) are sleeved on the outer wall of the air-cooled cylinder (3). The inner and outer walls of each annular pipe (6) are in contact with the surface of the air-cooled cylinder (3). A connecting pipe (7) is fixed between every two adjacent annular pipes (6). Multiple connecting pipes (7) are arranged in an alternating pattern from top to bottom. Multiple air inlets (8) are fixed on the outside of the cooling box (1). Each air inlet (8) is connected to the bottom of the air-cooled cylinder (3). An air inlet (9) is fixed on the top surface of the cooling box (1). The air inlet (9) is connected to the uppermost annular pipe (6). An air outlet (10) is fixed on the bottom surface of the cooling box (1). The air outlet (10) is connected to the lowermost annular pipe (6).

2. A cooling device for reducing liquid carryover of hydrogen gas from a refinery as claimed in claim 1, wherein, The cooling box (1) is fixed with an inlet (11) that connects to the water cooling chamber (2). The water cooling chamber (2) is fixed with a pump (12). The cooling box (1) is fixed with an outlet (13) that connects to the water cooling chamber (2). The outlet (13) is connected to the output end of the pump (12). The input end of the pump (12) is located inside the water cooling chamber (2).

3. A cooling device for reducing liquid carryover of hydrogen gas from a refinery as claimed in claim 1, wherein, The bottom of the water-cooled cavity (2) is fixed with a baffle (14) and the bottom surface of the air-cooled cylinder (3). A turbine (15) is rotatably connected to the center of the bottom of the water-cooled cavity (2). The turbine (15) is coaxially fixedly connected to the bottom end of the rotating rod (4).

4. A cooling device for reducing liquid carryover of hydrogen gas from a refinery as claimed in claim 1, wherein, The cooling box (1) is made of aluminum alloy.

5. A cooling device for reducing liquid carryover of hydrogen gas from a refinery as claimed in claim 1, wherein, The air inlet (9), air outlet (10), each annular pipe (6), and each connecting pipe (7) are all made of stainless steel, and the inner walls of the air inlet (9), air outlet (10), each annular pipe (6), and each connecting pipe (7) are electropolished.

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