Device for cold energy recovery

Abstract

The utility model relates to the technical field of cold energy recovery equipment, and provides a device for cold energy recovery, which comprises a main tower, a water cooling tower, a connecting pipe and a heat exchange coil pipe, the two ends of the connecting pipe are respectively connected with the main tower and the water cooling tower, the heat exchange coil pipe is connected to the end part of the connecting pipe, the heat exchange coil pipe is positioned in the water cooling tower, and the heat exchange coil pipe is spiral. The heat exchange coil pipe is provided with an air outlet which is higher than the liquid level in the water cooling tower. According to the technical scheme, the problem of energy waste caused by direct emptying of low-temperature non-condensable gas in the main tower in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold recovery equipment, and in particular to a device for cold recovery. Background Art

[0002] In the chemical industry, during the distillation process of some chemical towers (such as air separation towers), non-condensable gases in rare gases such as neon and helium always gather in the main tower condenser evaporator in gaseous form due to their low condensation temperature (neon is -246.1℃, helium is -268.9℃), occupying the heat exchange area and affecting the heat exchange effect. Therefore, the main tower condenser evaporator needs to be pumped out of the non-condensable gas with a pressure of about 1.0MPa for a long time. Because the temperature of this part of non-condensable gas is about -179℃ when it is extracted from the tower, direct emptying is a waste of energy. In view of the emergence of the above problems, the existing technology has not solved them well, which has brought troubles to the normal work in this field. Therefore, there is an urgent need for a device for cold recovery to solve the above problems. Utility Model Content

[0003] The utility model provides a device for cold recovery, which solves the problem of energy waste caused by direct discharge of low-temperature non-condensable gas in a main tower in the related art.

[0004] The technical solution of the utility model is as follows: a device for recovering cold energy, comprising a main tower, a water cooling tower, a connecting pipe and a heat exchange coil, wherein the two ends of the connecting pipe are respectively connected to the main tower and the water cooling tower, the heat exchange coil is connected to the end of the connecting pipe, the heat exchange coil is located in the water cooling tower, the heat exchange coil is spiral-shaped, and the heat exchange coil has an air outlet, and the air outlet is higher than the liquid level in the water cooling tower.

[0005] Optionally, the heat exchange coil includes an upper ring tube, a lower ring tube and a plurality of spiral tubes, the upper ring tube and the lower ring tube are both arranged in the water cooling tower, the lower ring tube is connected to the connecting tube, the two ends of the spiral tube are respectively connected to the upper ring tube and the lower ring tube, the upper ring tube and the lower ring tube are annular, and the spiral tube is spiral.

[0006] Optionally, the upper ring tube is higher than the liquid level in the water cooling tower, the air outlet is located on the upper ring tube, and there are multiple air outlets distributed along the circumference.

[0007] Optionally, it also includes a support rod, which is arranged in the water cooling tower, and a plurality of the support rods are distributed along the circumference. The spiral tube is a flexible tube, and the support rod is radially located on the inner side of the spiral tube, and the spiral tube abuts against the support rod.

[0008] Optionally, it also includes a rotating frame and a lifting frame, the lifting frame is vertically slidably arranged on the water cooling tower, the rotating frame is rotatably arranged on the lifting frame, the rotating frame is located in the water cooling tower, the upper ring pipe is arranged on the rotating frame, and the lower ring pipe is arranged on the bottom wall of the water cooling tower.

[0009] Optionally, the connecting pipe is outer-coated with a heat-insulating layer.

[0010] Optionally, it also includes an exhaust pipe, wherein both ends of the exhaust pipe are respectively connected to the main tower and the connecting pipe, and there are multiple exhaust pipes.

[0011] Optionally, a nitrogen pipe is also included, and the nitrogen pipe is connected to the water cooling tower.

[0012] The working principle and beneficial effects of the utility model are:

[0013] The main tower and the water cooling tower are connected by means of a connecting pipe, and a heat exchange coil is arranged inside the water cooling tower. The heat exchange coil is connected to the connecting pipe. On the basis of not changing the original equipment, the non-condensable gas in the condenser evaporator of the main tower can be introduced into the bottom of the water cooling tower, and after spiral heat exchange, it is discharged from the air outlet of the heat exchange coil to achieve the purpose of cooling the water temperature of the water cooling tower. It is very suitable for cooling the water source in the water cooling tower. Because the air outlet is higher than the liquid level in the water cooling tower, the non-condensable gas can be directly discharged to the part above the liquid level, and the dryness of the non-condensable gas is further utilized to make the water molecules evaporate and diffuse into the non-condensable gas continuously. In the process of water evaporation, the latent heat of vaporization is continuously absorbed, and the heat is continuously taken away from the water, so that the temperature of the water in the water cooling tower is continuously reduced, and the utilization rate of the non-condensable gas is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0015] Figure 1 It is a structural schematic diagram of a device for cold recovery;

[0016] Figure 2 This is a schematic diagram of the structure at an angle inside the water cooling tower;

[0017] Figure 3 This is a schematic diagram of the structure inside the water cooling tower from another angle;

[0018] Figure 4 is a schematic diagram of the structure of the support rod;

[0019] Figure 5 It is a schematic diagram of the structure of the heat exchange coil.

[0020] In the figure: 1. main tower, 2. water cooling tower, 3. connecting pipe, 4. heat exchange coil, 5. air outlet, 6. upper ring pipe, 7. lower ring pipe, 8. spiral pipe, 9. support rod, 10. rotating frame, 11. lifting frame, 12. insulation layer, 13. exhaust pipe, 14. nitrogen pipe. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0022] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0023] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] Example 1

[0026] Reference Figure 1~Figure 5 , which is the first embodiment of the utility model, proposes a device for cold recovery, including a main tower 1, a water cooling tower 2, a connecting pipe 3 and a heat exchange coil 4, wherein the two ends of the connecting pipe 3 are respectively connected to the main tower 1 and the water cooling tower 2, the heat exchange coil 4 is connected to the end of the connecting pipe 3, the heat exchange coil 4 is located in the water cooling tower 2, the heat exchange coil 4 is spiral, and the heat exchange coil 4 has an air outlet 5, and the air outlet 5 is higher than the liquid level in the water cooling tower 2.

[0027] In this embodiment, the main tower 1 and the water cooling tower 2 are connected by means of a connecting pipe 3, and a heat exchange coil 4 is arranged inside the water cooling tower 2, and the heat exchange coil 4 is connected to the connecting pipe 3. On the basis of not changing the original equipment, the non-condensable gas in the condenser evaporator of the main tower 1 can be introduced into the bottom of the water cooling tower 2, and after spirally surrounding heat exchange, it is discharged from the air outlet 5 of the heat exchange coil 4, so as to achieve the purpose of cooling the water temperature of the water cooling tower 2, which is very suitable for cooling the water source in the water cooling tower 2. Because the air outlet 5 is higher than the liquid level in the water cooling tower 2, the non-condensable gas can be directly discharged to the part above the liquid level, and the dryness of the non-condensable gas is further utilized to make the water molecules evaporate and diffuse into the non-condensable gas continuously, and the water continuously absorbs the latent heat of vaporization during the evaporation process, and continuously takes away the heat from the water, so that the temperature of the water in the water cooling tower 2 is continuously reduced, and the utilization rate of the non-condensable gas is further improved.

[0028] The heat exchange coil 4 includes an upper ring tube 6, a lower ring tube 7 and a plurality of spiral tubes 8. The upper ring tube 6 and the lower ring tube 7 are both arranged in the water cooling tower 2. The lower ring tube 7 is connected to the connecting pipe 3. Both ends of the spiral tube 8 are respectively connected to the upper ring tube 6 and the lower ring tube 7. The upper ring tube 6 and the lower ring tube 7 are annular, and the spiral tube 8 is spiral.

[0029] The upper ring tube 6 is higher than the liquid level in the water cooling tower 2 , and the gas outlet 5 is located on the upper ring tube 6 . There are a plurality of gas outlets 5 distributed along the circumference.

[0030] In this embodiment, the heat exchange coil 4 includes an upper ring tube 6 located at the top, a lower ring tube 7 located at the bottom, and a spiral tube 8 located in the middle. The two ends of the spiral tube 8 are respectively connected to the upper ring tube 6 and the lower ring tube 7, and are spiral-shaped. The lower ring tube 7 is connected to the connecting pipe 3 and is used to receive non-condensable gas. The overall structure is reasonable and the contact area with the water source in the water cooling tower 2 is guaranteed as much as possible. In addition, the gas outlet 5 is opened on the upper ring tube 6, and the upper ring tube 6 is protruding from the liquid surface. There are multiple gas outlets 5 distributed along the circumferential direction, and the non-condensable gas can be evenly discharged to the surrounding area above the liquid surface.

[0031] It also includes a support rod 9, which is arranged in the water cooling tower 2. There are multiple support rods 9 distributed along the circumference. The spiral tube 8 is a flexible tube. The support rod 9 is radially located on the inner side of the spiral tube 8, and the spiral tube 8 abuts against the support rod 9.

[0032] In this embodiment, the spiral tube 8 adopts a flexible tube, and a plurality of support rods 9 are arranged in a ring and located on the inner side of the spiral tube 8. The spiral tube 8 is spirally surrounded by the support rods 9. Under the support of the support rods 9, the spiral tube 8 can maintain its spiral shape, so that the spiral tube 8 is evenly distributed in the water cooling tower 2, ensuring a good heat exchange effect with the water source.

[0033] It also includes a rotating frame 10 and a lifting frame 11, the lifting frame 11 is vertically slidably arranged on the water cooling tower 2, the rotating frame 10 is rotatably arranged on the lifting frame 11, the rotating frame 10 is located in the water cooling tower 2, the upper ring pipe 6 is arranged on the rotating frame 10, and the lower ring pipe 7 is arranged on the bottom wall of the water cooling tower 2.

[0034] In this embodiment, the liquid level in the water cooling tower 2 may change with the operation of the equipment. As the liquid level in the water cooling tower 2 changes, the upper ring tube 6 may be immersed in the water source or too high above the liquid level. If the upper ring tube 6 is immersed in the water source, the non-condensable gas will be directly discharged into the water source; if it is too high above the liquid level, the effect of absorbing the latent heat of vaporization cannot be guaranteed. For this reason, it is necessary to adjust the height of the upper ring tube 6 according to actual conditions. Specifically, the lower ring tube 7 is arranged on the bottom wall of the water cooling tower 2, and the upper ring tube 6 is arranged on the rotating frame 10. When the liquid level changes, the height of the upper ring tube 6 can be adjusted by sliding the lifting frame 11 vertically, so that the upper ring tube 6 is always at a suitable height position relative to the liquid level.

[0035] After the height of the upper ring tube 6 changes, the spacing between it and the lower ring tube 7 changes, but the length of the spiral tube 8 in the middle is fixed. When the upper ring tube 6 rises, it will generate pulling force on the spiral tube 8. Because the length of the spiral tube 8 is fixed, it will cause the upper ring tube 6 to be unable to rise or cause pulling damage to the spiral tube 8; and when the upper ring tube 6 descends, the spiral tube 8 will become loose and droop. In order to ensure that the spiral tube 8 can cooperate with the lifting and lowering of the upper ring tube 6 and always remain in a taut state, it is necessary to rotate the upper ring tube 6 to cooperate with the height adjustment of the upper ring tube 6. Specifically, when the upper ring tube 6 rises, it rotates toward the side that loosens the spiral tube 8, and when the upper ring tube 6 descends, it rotates toward the side that tightens the spiral tube 8, so that the spiral tube 8 is always taut on the multiple support rods 9. The lifting and lowering of the lifting frame 11 can be achieved by setting a telescopic cylinder, and a motor is set on the lifting frame 11 to drive the rotation of the rotating frame 10.

[0036] The connecting pipe 3 is provided with a heat-insulating layer 12 on its outer sleeve.

[0037] In this embodiment, in order to ensure that the non-condensable gas can be kept at a low temperature as much as possible during transportation in the connecting pipe 3, a thermal insulation layer 12 is provided on the outer surface of the connecting pipe 3, thereby reducing the cold loss during transportation and ensuring the utilization rate of the non-condensable gas.

[0038] It also includes an air extraction pipe 13, both ends of which are connected to the main tower 1 and the connecting pipe 3 respectively, and there are multiple air extraction pipes 13.

[0039] In this embodiment, in order to ensure the recovery efficiency of the non-condensable gas in the main tower 1, a plurality of exhaust pipes 13 are arranged on the main tower 1, and the ends of the plurality of exhaust pipes 13 are combined on the connecting pipe 3 to ensure sufficient supply of non-condensable gas to the water-cooling tower 2.

[0040] It also includes a nitrogen pipe 14 , which is connected to the water cooling tower 2 .

[0041] In this embodiment, a nitrogen pipe 14 is connected to the water cooling tower 2 for cooling the water source in the water cooling tower 2. By increasing the introduction of non-condensable gas, the nitrogen consumption for cooling the water source in the water cooling tower 2 can be reduced, thereby reducing the load of the precooling system, which has a high practical significance in terms of energy saving and consumption reduction.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for cold recovery, characterized in that: The invention comprises a main tower (1), a water cooling tower (2), a connecting pipe (3) and a heat exchange coil (4), wherein two ends of the connecting pipe (3) are respectively connected to the main tower (1) and the water cooling tower (2), the heat exchange coil (4) is connected to the end of the connecting pipe (3), the heat exchange coil (4) is located in the water cooling tower (2), the heat exchange coil (4) is spiral-shaped, and the heat exchange coil (4) has an air outlet (5), and the air outlet (5) is higher than the liquid level in the water cooling tower (2).

2. The device for cold recovery according to claim 1, characterized in that: The heat exchange coil (4) comprises an upper ring tube (6), a lower ring tube (7) and a plurality of spiral tubes (8); the upper ring tube (6) and the lower ring tube (7) are both arranged in the water cooling tower (2); the lower ring tube (7) is connected to the connecting tube (3); the two ends of the spiral tube (8) are respectively connected to the upper ring tube (6) and the lower ring tube (7); the upper ring tube (6) and the lower ring tube (7) are annular, and the spiral tube (8) is spiral.

3. The device for cold recovery according to claim 2, characterized in that: The upper ring tube (6) is higher than the liquid level in the water cooling tower (2), the gas outlet (5) is located on the upper ring tube (6), and a plurality of the gas outlets (5) are distributed along the circumference.

4. A device for cold recovery according to claim 2 or 3, characterized in that: It also includes a support rod (9), the support rod (9) being arranged in the water cooling tower (2), a plurality of the support rods (9) being distributed along the circumference, the spiral tube (8) being a flexible tube, the support rod (9) being located radially on the inner side of the spiral tube (8), and the spiral tube (8) being in contact with the support rod (9).

5. The device for cold recovery according to claim 4, characterized in that: It also includes a rotating frame (10) and a lifting frame (11), wherein the lifting frame (11) is slidably disposed on the water cooling tower (2) in a vertical direction, and the rotating frame (10) is rotatably disposed on the lifting frame (11). The rotating frame (10) is located in the water cooling tower (2), the upper ring pipe (6) is disposed on the rotating frame (10), and the lower ring pipe (7) is disposed on the bottom wall of the water cooling tower (2).

6. The device for cold recovery according to claim 1, characterized in that: The connecting pipe (3) is provided with a heat-insulating layer (12) on its outer jacket.

7. The device for cold recovery according to claim 1, characterized in that: It also comprises an air extraction pipe (13), the two ends of which are respectively connected to the main tower (1) and the connecting pipe (3), and there are a plurality of air extraction pipes (13).

8. The device for cold recovery according to claim 1, characterized in that: It also includes a nitrogen pipe (14), wherein the nitrogen pipe (14) is connected to the water cooling tower (2).

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