Heat exchanger for air separation equipment

Abstract

The utility model discloses a heat exchanger for an air separation plant, which comprises a tank body, a tank cover is arranged at the upper port of the tank body, a feed pipe is fixed at the center of the upper surface of the tank cover, a discharge pipe is fixed on the left side of the tank body close to the lower end, and a heat exchanger for cooling the inside is arranged on the inner side of the tank body. The heat exchanger comprises a propeller rotationally mounted at the lowermost end, and a driving mechanism for driving the propeller to rotate is fixedly mounted at the lower end of the tank body. The heat exchanger is used for heat exchange, heat in liquid air is exchanged away and dissipated outwards, and at the moment, the driving mechanism drives the propeller to rotate so as to stir the liquid air to flow to the heat exchanger for heat exchange. Therefore, liquid air in the tank body continuously and circularly flows to the heat exchanger, so that heat exchange and cooling of the liquid air are more uniform, and meanwhile, a better heat exchange and cooling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air separation equipment, in particular to a heat exchanger used for air separation equipment. Background Art

[0002] The air separation equipment operates at low temperature during air separation, so a heat exchanger is required to cool down the compressed raw air temperature during air separation.

[0003] The Chinese patent with the announcement number CN211782279U discloses a heat exchanger for an air separation device, including a shell, a heat exchange component located in the shell, the heat exchange component including a heat exchange tube and a tube sheet, the heat exchange tube is arranged in an S shape, and the two end tubes of the heat exchange tube are provided with an inlet pipe and an outlet pipe, the inlet pipe is connected to an air purification tank, the outlet pipe is connected to a gas storage tank, the air purification tank and the gas storage tank are connected with a first ventilation pipe and a second ventilation pipe, the first ventilation pipe is provided with a heater and a first valve body, and the second ventilation pipe is provided with a refrigerator and a second valve body. The utility model provides a gas storage tank, stores the high-temperature gas medium discharged from the heat exchange tube in the gas storage tank, and then the gas medium passes through the refrigerator of the second ventilation pipe, cools the part of the gas medium, and then re-enters the heat exchange tube for cooling after being purified by the air purification tank, thereby realizing the recycling of the gas medium.

[0004] The above-mentioned heat exchanger for air separation equipment transfers the heat in the liquid air to the gas medium through the heat exchange tubes and tube sheets for heat exchange and discharges it to the outside. When the liquid air is heat exchanged, only the heat of the liquid air close to the heat exchange tubes and tube sheets can be well exchanged, and the heat of the liquid air far away from the heat exchange tubes and tube sheets needs to be conducted in the liquid air before it can be sent to the heat exchange tubes and tube sheets, which leads to uneven heat exchange and cooling of the liquid air and poor heat exchange effect. Utility Model Content

[0005] In order to solve the problem that the heat exchanger for air separation equipment has uneven heat exchange and cooling effect on liquid air, resulting in poor heat exchange effect, the present application provides a heat exchanger for air separation equipment, which adopts the following technical solution:

[0006] A heat exchanger for an air separation device comprises a tank body, a tank cover is installed at the upper port of the tank body, a feed pipe is fixed at the center of the upper surface of the tank cover, a discharge pipe is fixed at the left side of the tank body near the lower end, a heat exchanger for cooling the interior is installed inside the tank body, the heat exchanger comprises a propeller rotatably installed at the lower end, and a driving mechanism for driving the propeller to rotate is fixedly installed at the lower end of the tank body.

[0007] Optionally, the heat exchanger also includes a heat exchange tube, the outer side of which is fixed with a plurality of tube sheets evenly arranged on the left and right, and the left and right edges of the heat exchange tube are fixed with vertical support rods, the lower ends of the left and right support rods are fixedly connected by fixing rods, the propeller is arranged on the upper side of the fixing rod, and the center axis of the propeller passes through the fixing rod and is fixed with a transmission sleeve, and the two end portions of the heat exchange tube are fixed with connecting sleeves that are connected to the pipe sleeve on the outside of the tank body.

[0008] Optionally, the air outlet end of the heat exchange tube is connected to a compressor via a pipeline, and the liquid outlet end of the compressor is connected to a condenser via a high-temperature pipeline, the liquid outlet end of the condenser is connected to an expansion valve via a pipeline, and the expansion valve is connected to the air inlet end of the heat exchange tube via a pipeline.

[0009] Optionally, the driving mechanism includes a driving motor fixed to the lower end of the tank body, and the upper end of the main shaft of the driving motor passes through the bottom of the tank body and is fixed with a plug connector connected to the transmission sleeve.

[0010] Optionally, a clamping platform is fixed to the lower side of the tank cover, and a limiting groove cooperating with the support rod is opened on the lower surface of the clamping platform, and a mounting edge is fixed to the outer edge of the clamping platform.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, heat is exchanged in the liquid air through the heat exchanger and the heat is dissipated outwardly, and at this time, the propeller is driven to rotate by the driving mechanism to drive the liquid air to flow to the heat exchanger for heat exchange, so that the liquid air in the tank body is continuously circulated to the heat exchanger, so that the heat exchange and cooling of the liquid air are more uniform, and at the same time, a better heat exchange and cooling effect is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a cross-sectional view of a heat exchanger used in an air separation device of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a heat exchanger used in an air separation device shown in the utility model;

[0016] Figure 3 It is a schematic diagram of a driving mechanism of a heat exchanger used in an air separation device shown in the utility model;

[0017] Figure 4 The utility model is a schematic diagram of a tank cover of a heat exchanger used in an air separation device.

[0018] In the figure: 1. tank cover; 110. clamping table; 120. limit groove; 130. installation edge; 2. tank body; 3. heat exchanger; 31. tube sheet; 32. support rod; 33. heat exchange tube; 34. connecting sleeve; 35. fixing rod; 36. propeller; 37. transmission sleeve; 4. compressor; 5. discharge pipe; 6. high-temperature pipeline; 7. driving mechanism; 71. driving motor; 72. main shaft; 73. plug connector; 8. condenser; 9. expansion valve; 10. feed pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0020] Please refer to Figure 1 and Figure 2 As shown, a heat exchanger for an air separation device includes a tank body 2, a tank cover 1 is installed at the upper end of the tank body 2, and a feed pipe 10 is fixed at the center of the upper surface of the tank cover 1, a discharge pipe 5 is fixed on the left side of the tank body 2 near the lower end, and a heat exchanger 3 for cooling the interior is installed on the inner side of the tank body 2, and the heat exchanger 3 includes a propeller 36 rotatably installed at the lower end, and a driving mechanism 7 for driving the propeller 36 to rotate is fixedly installed at the lower end of the tank body 2. The heat in the liquid air is exchanged and dissipated outward through the heat exchanger 3 for heat exchange, and at this time, the propeller 36 is driven to rotate by the driving mechanism 7 to drive the liquid air to flow to the heat exchanger 3 for heat exchange, so that the liquid air in the tank body 2 is continuously circulated to flow to the heat exchanger 3, so that the heat exchange and cooling of the liquid air are more uniform, and at the same time, a better heat exchange and cooling effect is achieved.

[0021] Please refer to Figure 2As shown, the heat exchanger 3 also includes a heat exchange tube 33, and a plurality of tube sheets 31 evenly arranged on the left and right are fixed to the outer side of the heat exchange tube 33. The heat exchange tube 33 and the tube sheet 31 conduct heat, and the left and right edges of the heat exchange tube 33 are fixed with vertical support rods 32 for fixed support of the heat exchanger 3. The lower ends of the left and right support rods 32 are fixedly connected by a fixing rod 35. The propeller 36 is arranged on the upper side of the fixing rod 35, and the central axis of the propeller 36 passes through the fixing rod 35 and is fixed with a transmission sleeve 37. The propeller 36 is transmission-connected to the driving mechanism 7 through the transmission sleeve 37. The two end parts of the heat exchange tube 33 are fixed with connecting sleeves 34 that are connected to the pipe sleeve on the outside of the tank body 2 to facilitate the sleeve connection with the external pipe.

[0022] Please refer to Figure 1 As shown, the air outlet end of the heat exchange tube 33 is connected to the compressor 4 through a pipeline, and the liquid outlet end of the compressor 4 is connected to the condenser 8 through a high-temperature pipeline 6, the liquid outlet end of the condenser 8 is connected to the expansion valve 9 through a pipeline, and the expansion valve 9 is connected to the air inlet end of the heat exchange tube 33 through a pipeline, the compressor 4 compresses the gas medium into a high-temperature and high-pressure liquid and then dissipates heat and cools it through the condenser 8, the cooled gas medium is decompressed and evaporated through the expansion valve and enters the heat exchange tube 33 to absorb heat, thereby absorbing heat and cooling the liquid air.

[0023] Please refer to Figure 3 As shown, the driving mechanism 7 includes a driving motor 71 fixed to the lower end of the tank body 2, and the upper end of the main shaft 72 of the driving motor 71 passes through the bottom of the tank body 2 and is fixed with a plug connector 73 that is transmission-sleeved with the transmission sleeve 37, and the main shaft 72 is transmission-sleeved with the transmission sleeve 37 through the plug connector 73.

[0024] Please refer to Figure 4 As shown, a clamping platform 110 is fixed to the lower side of the tank cover 1, and a limiting groove 120 cooperating with the support rod 32 is opened on the lower surface of the clamping platform 110, and a mounting edge 130 is fixed to the outer edge of the clamping platform 110. The tank cover 1 is fixed to the upper port of the tank body 2 through the clamping platform 110, and is screwed through the mounting edge 130 to be fixed to the tank body 2.

[0025] Working principle: When cooling the liquid air in the tank 2, the gas medium is compressed into a high-temperature and high-pressure liquid by the compressor 4 and then cooled by the condenser 8. The cooled gas medium is decompressed and evaporated by the expansion valve and enters the heat exchange tube 33 to absorb heat through the heat exchange tube 33 and the tube sheet 31 to exchange the heat in the liquid air, thereby completing the heat absorption and cooling of the liquid air.

[0026] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat exchanger for an air separation plant, comprising a tank (2), characterized in that: A tank cover (1) is installed at the upper end of the tank body (2), and a feed pipe (10) is fixed at the center of the upper surface of the tank cover (1). A discharge pipe (5) is fixed on the left side of the tank body (2) near the lower end. A heat exchanger (3) for cooling the interior is installed on the inner side of the tank body (2). The heat exchanger (3) includes a propeller (36) rotatably installed at the lower end. A driving mechanism (7) for driving the propeller (36) to rotate is fixedly installed at the lower end of the tank body (2).

2. A heat exchanger for an air separation plant according to claim 1, characterized in that: The heat exchanger (3) further comprises a heat exchange tube (33), a plurality of tube sheets (31) evenly arranged on the left and right sides are fixed to the outer side of the heat exchange tube (33), and vertical support rods (32) are fixed to the left and right edges of the heat exchange tube (33), the lower ends of the support rods (32) on the left and right sides are fixedly connected by a fixing rod (35), the propeller (36) is arranged on the upper side of the fixing rod (35), and the central axis of the propeller (36) passes through the fixing rod (35) and is fixed with a transmission sleeve (37), and the two end portions of the heat exchange tube (33) are fixed with a connecting sleeve (34) connected to the pipe sleeve on the outer side of the tank body (2).

3. A heat exchanger for an air separation plant according to claim 2, characterized in that: The gas outlet end of the heat exchange tube (33) is connected to the compressor (4) via a pipeline, and the liquid outlet end of the compressor (4) is connected to the condenser (8) via a high-temperature pipeline (6), the liquid outlet end of the condenser (8) is connected to the expansion valve (9) via a pipeline, and the expansion valve (9) is connected to the gas inlet end of the heat exchange tube (33) via a pipeline.

4. A heat exchanger for an air separation plant according to claim 3, characterized in that: The driving mechanism (7) comprises a driving motor (71) fixed to the lower end of the tank body (2); the upper end of the main shaft (72) of the driving motor (71) passes through the bottom of the tank body (2) and is fixed with a plug connector (73) that is connected to the transmission sleeve (37).

5. The heat exchanger for an air separation plant according to claim 3, characterized in that: A clamping platform (110) is fixed on the lower side of the tank cover (1), and a limiting groove (120) cooperating with the support rod (32) is provided on the lower surface of the clamping platform (110), and a mounting edge (130) is fixed on the outer edge of the clamping platform (110).

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