A circulating cooling system for air separation equipment

Abstract

The utility model discloses a circulating cooling system for air separation equipment, including a cooling tower body and a liquid circulation inner tube arranged in the cooling tower body, the outer wall of the liquid circulation inner tube and the inner wall of the cooling tower body form a cooling liquid outer circulation area, a cooling liquid inner tube is also arranged in the liquid circulation inner tube, the outer wall of the cooling liquid inner tube and the inner wall of the liquid circulation inner tube form a liquid circulation area; the upper and lower ends of the liquid circulation inner tube are provided with sealing connection structures for separating the cooling liquid outer circulation area, the liquid circulation area and the cooling liquid inner tube, and respectively connecting the circulating cooling structure and the liquid reflux tank, and the liquid circulation area is a spiral channel. The liquid circulation pipeline of the utility model is arranged in a spiral shape, which effectively prolongs the cooling time of the liquid and increases the contact area. At the same time, the cooling liquid circulation area is arranged inside and outside the liquid circulation area, and the inside and outside are cooled simultaneously, further improving the heat dissipation capacity.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling circulation, and in particular relates to a circulating cooling system for air separation equipment. Background Art

[0002] Air separation equipment is a gas separation equipment that liquefies, distills, and finally separates air into oxygen, nitrogen, and other useful gases. During the cooling process of air, moisture and CO2 precipitate and freeze in the heat exchanger channel; after a certain period of time, the channel is switched and the frozen impurities are taken away by the reflux polluted nitrogen gas.

[0003] Chinese patent CN219141604U discloses a wet cooling tower for air separation circulating water system, which continuously absorbs heat from the object to be cooled in the liquid channel through the circulating coolant in the coolant channel, and takes away the heat; at the same time, the coolant flows in the opposite direction to the object to be cooled, which can reduce the possibility of repeated heat transfer; and a heat conductor is arranged on the coolant channel, which can further accelerate the rate of heat transfer to the coolant and expand the heat dissipation area. Finally, after the coolant enters the cooling pool, it is dissipated by the heat dissipation fan in the coil, and then returns to the coolant channel, so that the contact area is comprehensive. Compared with the traditional technology, the heat dissipation efficiency is higher. The above-mentioned comparative document sets the coolant channel on the periphery of the liquid channel. Although it adopts a spiral channel to extend the liquid flow time, only the periphery of the channel can contact the coolant channel, and there is no coolant flowing inside the channel, and the cooling efficiency still needs to be improved. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a circulating cooling system for an air separation plant.

[0005] The specific technical solutions are as follows:

[0006] A circulating cooling system for an air separation device comprises a cooling tower body and a liquid circulation inner tube arranged in the cooling tower body, wherein an outer wall of the liquid circulation inner tube and an inner wall of the cooling tower body form a cooling liquid outer circulation area, and a cooling liquid inner tube is further arranged in the liquid circulation inner tube, wherein an outer wall of the cooling liquid inner tube and an inner wall of the liquid circulation inner tube form a liquid circulation area;

[0007] The upper and lower ends of the liquid circulation inner tube are provided with sealing connection structures, which include a cooling liquid conduit, a liquid communication tube and a sealing cover. The sealing cover is sealed and connected to the end of the liquid circulation inner tube. One end of the cooling liquid conduit passes through the sealing cover and is inserted into the cooling liquid inner tube to be sealed and connected thereto. One end of the liquid communication tube passes through the sealing cover and is connected to the liquid circulation area.

[0008] Sealed connecting plates are provided at the upper and lower ends of the cooling tower body, and a cooling liquid connecting pipe is provided on the sealing connecting plate for connecting the circulating cooling structure and the cooling liquid external circulation area. The other end of the cooling liquid conduit and the other end of the liquid connecting pipe pass through the sealing connecting plate to circulate and connect the circulating cooling structure and the liquid reflux tank respectively.

[0009] Furthermore, the liquid circulation area is a spiral channel.

[0010] Furthermore, the outer surfaces of the upper and lower ends of the liquid circulation inner tube are provided with external thread structures, the inner surface of the sealing cover is provided with an internal thread structure, and the sealing cover and the liquid circulation inner tube are threadedly connected.

[0011] Furthermore, a sealing ring is provided at the end of the coolant conduit inserted into the coolant inner tube.

[0012] Furthermore, the circulating cooling structure includes a cooling pool, a coolant outlet pipeline and a coolant inlet pipeline. One end of the coolant outlet pipeline is connected to the cooling pool, and the other end is divided into two pipelines respectively connected to the coolant conduit and the coolant connecting pipe above. One end of the coolant inlet pipeline is connected to the cooling pool, and the other end is divided into two pipelines respectively connected to the coolant conduit and the coolant connecting pipe below.

[0013] Furthermore, the outside of the cooling tower body is fixedly provided with supporting feet distributed in an annular manner.

[0014] The beneficial effects of the utility model are:

[0015] The liquid circulation pipeline of the utility model is arranged in a spiral shape, which effectively prolongs the liquid cooling time and increases the contact area. At the same time, coolant circulation areas are arranged inside and outside the liquid circulation area, and the inside and outside are cooled simultaneously, further improving the heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view three-dimensional disassembled structure schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the disassembled structure of the utility model when viewed from above;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the inner tube where the liquid flows.

[0019] In the figure: 1. Cooling tower body; 11. Sealing connecting plate; 111. Cooling liquid connecting pipe; 12. Support foot; 2. Liquid circulation inner pipe; 21. Sealing connection structure; 211. Cooling liquid conduit; 2111. Sealing ring; 212. Liquid connecting pipe; 213. Sealing cover; 2131. Internal thread structure; 22. External thread structure; 3. Cooling liquid external circulation area; 4. Cooling liquid inner pipe; 5. Liquid circulation area; 6. Circulating cooling structure; 61. Cooling tank; 62. Cooling liquid outlet pipeline; 63. Cooling liquid inlet pipeline; 7. Liquid reflux tank. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the drawings in the specification, but the protection scope of the utility model is not limited thereto.

[0021] like Figures 1 to 3As shown, a circulating cooling system for an air separation device comprises a cooling tower body 1, a liquid circulation inner tube 2, a cooling liquid inner tube 4, a circulating cooling structure 6 and a liquid reflux tank 7, wherein the liquid circulation inner tube 2 is arranged in the cooling tower body 1, the cooling liquid inner tube 4 is arranged in the liquid circulation inner tube 2, the outer wall of the liquid circulation inner tube 2 and the inner wall of the cooling tower body 1 form a cooling liquid outer circulation area 3, the outer wall of the cooling liquid inner tube 4 and the inner wall of the liquid circulation inner tube 2 form a liquid circulation area 5, and the liquid circulation area 5 is a spiral channel; the upper and lower ends of the liquid circulation inner tube 2 are provided with sealing connections Structure 21, each set of sealing connection structure 21 includes a coolant conduit 211, a liquid connecting pipe 212 and a sealing cover 213, the outer surfaces of the upper and lower ends of the liquid circulation inner tube 2 are provided with external thread structures 22, the inner surface of the sealing cover 213 is provided with an internal thread structure 2131, the sealing cover 213 and the liquid circulation inner tube 2 are threadedly connected, thereby separating the coolant outer circulation area 3 and the liquid circulation area 5 to prevent the external coolant from mixing with the liquid, and one end of the coolant conduit 211 is provided with a sealing ring 2111, which passes through the sealing cover 213 and is inserted into the inner surface of the liquid circulation inner tube 2. The cooling liquid inner tube 4 is sealedly connected with it, thereby separating the liquid circulation area 5 and the cooling liquid inner tube 4 to prevent the internal cooling liquid from mixing with the liquid. One end of the liquid connecting tube 212 passes through the sealing cover 213 to communicate with the liquid circulation area 5; the upper and lower ends of the cooling tower body 1 are provided with a sealing connecting plate 11, and the sealing connecting plate 11 is provided with a cooling liquid connecting tube 111 for connecting the circulating cooling structure 6 and the cooling liquid outer circulation area 3. The other end of the cooling liquid conduit 211 and the other end of the liquid connecting tube 212 pass through the sealing connecting plate 11, and the circulating cooling structure 6 It includes a cooling pool 61, a cooling liquid outlet pipeline 62 and a cooling liquid inlet pipeline 63. One end of the cooling liquid outlet pipeline 62 is connected to the cooling pool 61, and the other end is divided into two pipelines respectively connected to the upper cooling liquid conduit 211 and the cooling liquid connecting pipe 111. One end of the cooling liquid inlet pipeline 63 is connected to the cooling pool 61, and the other end is divided into two pipelines respectively connected to the lower cooling liquid conduit 211 and the cooling liquid connecting pipe 111. The upper and lower liquid connecting pipes 212 are circulated and connected to the liquid reflux tank 7. The outside of the cooling tower body 1 is fixedly provided with annularly distributed supporting feet 12.

[0022] The liquid to be cooled is placed in the liquid reflux tank 7, and then enters the liquid circulation area 5 through the liquid connecting pipe 212. The coolant in the cooling pool 61 enters the coolant conduit 211 and the coolant connecting pipe 111 respectively through the coolant outlet pipe 62, and then enters the coolant inner pipe 4 and the coolant outer circulation area 3 respectively, to cool the liquid in the liquid circulation area 5, and the coolant flows back to the cooling pool 61 through the coolant inlet pipe 63.

Claims

1. A circulating cooling system for an air separation plant, characterized in that: The cooling tower comprises a cooling tower body (1) and a liquid circulation inner tube (2) arranged in the cooling tower body (1), wherein an outer wall of the liquid circulation inner tube (2) and an inner wall of the cooling tower body (1) form a cooling liquid outer circulation area (3), and a cooling liquid inner tube (4) is further arranged in the liquid circulation inner tube (2), and a liquid circulation area (5) is formed between an outer wall of the cooling liquid inner tube (4) and an inner wall of the liquid circulation inner tube (2); The upper and lower ends of the liquid circulation inner tube (2) are both provided with a sealing connection structure (21), the sealing connection structure (21) comprising a cooling liquid conduit (211), a liquid communication tube (212) and a sealing cover (213), the sealing cover (213) being sealingly connected to the end of the liquid circulation inner tube (2), one end of the cooling liquid conduit (211) passing through the sealing cover (213) and inserted into the cooling liquid inner tube (4) to be sealedly connected thereto, and one end of the liquid communication tube (212) passing through the sealing cover (213) to be connected to the liquid circulation area (5); The cooling tower body (1) is provided with sealing connection plates (11) at both upper and lower ends. The sealing connection plates (11) are provided with a cooling liquid connecting pipe (111) for connecting the circulating cooling structure (6) and the cooling liquid external circulation area (3). The other end of the cooling liquid conduit (211) and the other end of the liquid connecting pipe (212) pass through the sealing connection plates (11) to respectively connect the circulating cooling structure (6) and the liquid return tank (7) in a circulating manner.

2. A circulating cooling system for an air separation plant according to claim 1, characterized in that: The liquid circulation area (5) is a spiral channel.

3. A circulating cooling system for an air separation plant as claimed in claim 2, characterized in that: The outer surfaces of the upper and lower ends of the liquid circulation inner tube (2) are both provided with external thread structures (22), the inner surface of the sealing cover (213) is provided with an internal thread structure (2131), and the sealing cover (213) and the liquid circulation inner tube (2) are threadedly connected.

4. A circulating cooling system for an air separation plant as claimed in claim 3, characterized in that: A sealing ring (2111) is provided at the end of the coolant conduit (211) inserted into the coolant inner tube (4).

5. A circulating cooling system for an air separation plant as claimed in claim 4, characterized in that: The circulating cooling structure (6) comprises a cooling pool (61), a cooling liquid outlet pipeline (62) and a cooling liquid inlet pipeline (63); one end of the cooling liquid outlet pipeline (62) is connected to the cooling pool (61), and the other end is divided into two pipelines respectively connected to the cooling liquid conduit (211) and the cooling liquid connecting pipe (111) above; one end of the cooling liquid inlet pipeline (63) is connected to the cooling pool (61), and the other end is divided into two pipelines respectively connected to the cooling liquid conduit (211) and the cooling liquid connecting pipe (111) below.

6. A circulating cooling system for an air separation plant as claimed in claim 5, characterized in that: The outside of the cooling tower body (1) is fixedly provided with support legs (12) distributed in an annular shape.

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