Gas cooling device

Abstract

The utility model provides a gas cooling device. The gas cooling device comprises a tank body, a gas conveying structure and a cooling structure, wherein the mixed gas guided by the gas conveying structure is guided into the cooling oil, liquid carbon dioxide formed after the mixed gas is cooled by the cooling oil sinks to the position below the cooling oil, and the remaining mixed gas rises to the upper portion of the bearing cavity. According to the gas cooling device, the tank body is arranged, cooling oil can be borne through the bearing cavity of the tank body, cooled liquid carbon dioxide is discharged through the discharging port in the bottom end of the tank body, and mixed gas of non-liquefied carbon dioxide gas and hydrogen is discharged through the exhaust port in the top end of the tank body; a gas conveying structure is arranged on the tank body and can extend into the bearing cavity from the top end of the tank body and extend to the bottom of the bearing cavity, and mixed gas is discharged from the position below the liquid level of cooling oil for cooling; and the cooling structure is arranged on the tank body, mixed gas on the upper portion of the bearing cavity can be cooled, the cooling efficiency is good, and practicability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas cooling, and in particular relates to a gas cooling device. Background Art

[0002] Gas cooling is the process of lowering the temperature of gas by various methods. In urea production, in order to prevent equipment corrosion, a certain amount of air or oxygen needs to be added to the raw CO2 gas. These gases do not participate in the urea synthesis reaction and remain in the synthesis system. If the raw carbon dioxide gas contains hydrogen, after washing and absorption by the high-pressure scrubber, NH3, H2, and O2 in the tail gas are very likely to form explosive gases. Once an explosive factor is encountered, it can cause deflagration, causing equipment damage and environmental pollution caused by the leakage of pollutants, which may cause personal injury in severe cases. Therefore, for the urea synthesis process, it is indispensable to achieve the dehydrogenation of raw gas carbon dioxide.

[0003] In the prior art, when separating carbon dioxide from carbon dioxide gas containing hydrogen, a low-temperature distillation method is usually used to separate CO2 from the mixed gas (causing carbon dioxide to flow out in liquid form) by taking advantage of the fact that the boiling point of CO2 at low temperatures is different from that of H2. However, the existing low-temperature distillation method is inefficient and has poor practicality. Utility Model Content

[0004] The embodiment of the utility model provides a gas cooling device, aiming to solve the problems of low efficiency and poor practicality of the existing low-temperature distillation method.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a gas cooling device, comprising:

[0006] The tank body has a bearing cavity, the bottom of which contains cooling oil; a discharge port is provided at the bottom of the tank body; and an exhaust port is provided at the top of the tank body;

[0007] A gas delivery structure is arranged on the tank body, one end of which extends from the top of the tank body into the bearing cavity and extends to the bottom of the bearing cavity;

[0008] A cooling structure, disposed in the bearing cavity, for cooling the mixed gas at the upper part of the bearing cavity;

[0009] The mixed gas introduced by the gas delivery structure is introduced into the cooling oil, and the liquid carbon dioxide formed after being cooled by the cooling oil sinks below the cooling oil, and the remaining mixed gas rises to the upper part of the bearing cavity.

[0010] In a possible implementation, the gas delivery structure is an air intake pipeline.

[0011] In a possible implementation, the cooling structure includes:

[0012] A first connecting pipe, arranged on the top of the tank body, with one end extending into the bearing cavity;

[0013] A second connecting pipe, disposed at the bottom of the tank body, with one end extending into the bearing cavity;

[0014] The spiral tube is spirally arranged in the bearing cavity, and its two ends are respectively connected to the first connecting tube and the second connecting tube.

[0015] In a possible implementation, a cooling oil inlet and a cooling oil outlet are further provided on the tank body, and the cooling oil outlet is located above the cooling oil inlet.

[0016] In a possible implementation, a guide strip is provided at the bottom end of the bearing cavity to facilitate the discharge of liquid carbon dioxide from the discharge port.

[0017] In a possible implementation manner, a support frame for supporting the tank body is provided at the bottom of the tank body.

[0018] In this implementation, compared with the prior art, a tank body is provided, through which the cooling oil can be carried by the bearing cavity of the tank body, and the cooled liquid carbon dioxide can be discharged through the discharge port at the bottom end of the tank body, and the mixed gas of unliquefied carbon dioxide gas and hydrogen can be discharged through the exhaust port at the top end of the tank body; a gas conveying structure is provided on the tank body, which can extend from the top end of the tank body into the bearing cavity and extend to the bottom of the bearing cavity, and discharge the mixed gas from below the liquid surface of the cooling oil for cooling; a cooling structure is provided on the tank body, which can cool the mixed gas in the upper part of the bearing cavity, and has good cooling efficiency and good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a gas cooling device provided in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the internal structure of a gas cooling device provided in an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the top view of the bottom end of the bearing cavity of the gas cooling device provided by an embodiment of the utility model;

[0022] Description of reference numerals:

[0023] 10. Tank body; 11. Load-bearing cavity; 12. Discharge port; 13. Exhaust port; 14. Cooling oil inlet; 15. Cooling oil outlet; 16. Guide strip; 17. Support frame; 20. Gas conveying structure; 30. Cooling structure; 31. First connecting pipe; 32. Second connecting pipe; 33. Spiral pipe. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Please also read Figures 1 to 3 , the gas cooling device provided by the utility model is now described. The gas cooling device includes: a tank body 10, a gas conveying structure 20 and a cooling structure 30. The tank body 10 has a bearing cavity 11, and the bottom of the bearing cavity 11 is filled with cooling oil. A discharge port 12 is provided at the bottom end of the tank body 10. An exhaust port 13 is provided at the top. The gas conveying structure 20 is arranged on the tank body 10, and one end extends from the top of the tank body 10 into the bearing cavity 11 and extends to the bottom of the bearing cavity 11. The cooling structure 30 is arranged in the bearing cavity 11, and is used to cool the mixed gas in the upper part of the bearing cavity 11.

[0026] The mixed gas introduced by the gas delivery structure 20 is introduced into the cooling oil, and the liquid carbon dioxide formed after being cooled by the cooling oil sinks below the cooling oil, and the remaining mixed gas rises to the upper part of the bearing cavity 11 .

[0027] The working principle of this embodiment is that the mixed gas introduced by the gas delivery structure 20 is introduced into the cooling oil for the first cooling, and the liquid carbon dioxide sinks to the bottom of the cooling oil because the density of liquid carbon dioxide is greater than that of the cooling oil, and the remaining mixed gas rises to the upper part of the bearing cavity 11, and then the mixed gas in the upper part of the bearing cavity 11 is cooled for the second time through the cooling structure 30, and the cooling oil in the bearing cavity 11 is cooled at the same time.

[0028] The cooling oil can be silicone oil, which is a polymer composed of silicon and oxygen. It has very good chemical inertness and will not react with carbon dioxide. The cooling oil can also be mineral oil, which is a common coolant. It is extracted from petroleum and has good chemical stability.

[0029] Compared with the prior art, the gas cooling device provided in this embodiment is provided with a tank body 10, which can carry cooling oil through the bearing cavity 11 of the tank body 10, discharge the cooled liquid carbon dioxide through the discharge port 12 at the bottom of the tank body 10, and discharge the mixed gas of unliquefied carbon dioxide gas and hydrogen through the exhaust port 13 at the top of the tank body 10. A gas conveying structure 20 is provided on the tank body 10, which can extend from the top of the tank body 10 into the bearing cavity 11 and extend to the bottom of the bearing cavity 11, discharge the mixed gas from below the liquid surface of the cooling oil, and cool it down. A cooling structure 30 is provided on the tank body 10, which can cool the mixed gas in the upper part of the bearing cavity 11, and has good cooling efficiency and good practicality.

[0030] In some embodiments, the gas delivery structure 20 may be configured as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 , the gas delivery structure 20 is an air intake pipeline.

[0031] The air intake pipeline can be understood as an air pipe extending into the bearing cavity 11 , and can introduce a high-pressure and high-temperature mixed gas of carbon dioxide and hydrogen into the bearing cavity 11 .

[0032] In some embodiments, the cooling structure 30 may be configured as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 The cooling structure 30 includes: a first connecting pipe 31, a second connecting pipe 32 and a spiral pipe 33. The first connecting pipe 31 is arranged at the top of the tank body 10, and one end thereof extends into the bearing cavity 11. The second connecting pipe 32 is arranged at the bottom of the tank body 10, and one end thereof extends into the bearing cavity 11. The spiral pipe 33 is arranged in a spiral shape in the bearing cavity 11, and its two ends are connected to the first connecting pipe 31 and the second connecting pipe 32 respectively.

[0033] The first connecting pipe 31 and the second connecting pipe 32 can be understood as two refrigerant pipes extending into the bearing cavity 11. A spiral pipe 33 is connected between the first connecting pipe 31 and the second connecting pipe 32. The spiral pipe 33 is spirally arranged in the bearing cavity 11. The first connecting pipe 31 and the second connecting pipe 32 are located at the top of the tank body 10 and the bottom of the tank body 10, respectively. The refrigerant enters from the bottom of the tank body 10 through the spiral pipe 33 and is then discharged from the top of the tank body 10. The refrigerant is a working fluid that transfers heat energy and produces a refrigeration effect in a refrigeration and air conditioning system. The refrigerant is a prior art and will not be described in detail here.

[0034] In some embodiments, the tank 10 may be formed as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2The tank body 10 is also provided with a cooling oil inlet 14 and a cooling oil outlet 15 , and the cooling oil outlet 15 is located above the cooling oil inlet 14 .

[0035] The cooling oil inlet 14 and the cooling oil outlet 15 can be understood as pipes connected to the bearing cavity 11. The cooling oil outlet 15 is located above the cooling oil inlet 14, so that the cooling oil is poured into the bearing cavity 11 through the cooling oil inlet 14 below. When the cooling oil fills the bottom of the bearing cavity 11, the cooling oil that absorbs more heat during cooling is discharged through the cooling oil outlet 15 above, and then new coolant is poured through the cooling oil inlet 14.

[0036] In some embodiments, the above-mentioned bearing cavity 11 can be used as follows Figure 2 , Figure 3 See the structure shown. Figure 2 , Figure 3 A guide strip 16 is provided at the bottom of the bearing cavity 11 to facilitate the discharge of liquid carbon dioxide from the discharge port 12 .

[0037] The guide bar 16 is an arc-shaped structure, which can facilitate the discharge of liquid carbon dioxide from the discharge port 12 .

[0038] In some embodiments, the tank 10 may be formed as follows: Figure 1 , Figure 2 See the structure shown. Figure 1 , Figure 2 A support frame 17 for supporting the tank body 10 is provided at the bottom of the tank body 10 .

[0039] The support frame 17 can support the tank body 10 to prevent the tank body 10 from tipping over.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas cooling device, characterized in that: include: The tank body has a bearing cavity, the bottom of which contains cooling oil; a discharge port is provided at the bottom of the tank body; and an exhaust port is provided at the top of the tank body; A gas delivery structure is arranged on the tank body, one end of which extends from the top of the tank body into the bearing cavity and extends to the bottom of the bearing cavity; A cooling structure, disposed in the bearing cavity, for cooling the mixed gas at the upper part of the bearing cavity; The mixed gas introduced by the gas delivery structure is introduced into the cooling oil, and the liquid carbon dioxide formed after being cooled by the cooling oil sinks below the cooling oil, and the remaining mixed gas rises to the upper part of the bearing cavity.

2. The gas cooling device according to claim 1, characterized in that: The gas delivery structure is an air intake pipeline.

3. The gas cooling device according to claim 1, characterized in that: The cooling structure comprises: A first connecting pipe, arranged on the top of the tank body, with one end extending into the bearing cavity; A second connecting pipe, disposed at the bottom of the tank body, with one end extending into the bearing cavity; The spiral tube is spirally arranged in the bearing cavity, and its two ends are respectively connected to the first connecting tube and the second connecting tube.

4. The gas cooling device according to claim 1, characterized in that: The tank body is also provided with a cooling oil inlet and a cooling oil outlet, and the cooling oil outlet is located above the cooling oil inlet.

5. The gas cooling device according to claim 1, characterized in that: A guide strip is provided at the bottom end of the bearing cavity to facilitate the discharge of liquid carbon dioxide from the discharge port.

6. The gas cooling device according to claim 1, characterized in that: A support frame for supporting the tank body is provided at the bottom of the tank body.

Images