Energy-saving high tower device

Abstract

The utility model relates to the technical field of tail gas treatment and emission equipment, in particular to an energy-saving high tower device which comprises a recovery structure, a heat exchange structure and a high tower structure. The heat exchange structure comprises a condensation main machine connected to the recovery structure and the high tower structure and a heat exchange assembly arranged on the high tower structure. The condensation main machine is provided with a plurality of cooling surface air coolers, the cooling surface air coolers are filled with heat-conducting media, and the cooling surface air coolers are connected with medium flowing pipes. The heat exchange assembly comprises a plurality of heat exchangers arranged on the high tower structure, and the heat exchangers are arranged in the height direction of the high tower structure. The medium flowing pipe passes through the heat exchangers. The condensation main machine continuously refrigerates to treat the NMP waste gas at a low temperature, the heat-conducting medium is conveyed to the heat exchanger through the medium flowing pipe after the temperature is increased to exchange heat with the NMP waste gas, the temperature of the NMP waste gas is increased to be similar to the environment temperature, and the heat-conducting medium is conveyed back to the condensation main machine after the temperature of the heat-conducting medium is reduced. Therefore, rime fog is avoided, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment and emission equipment, and in particular to an energy-saving high tower device. Background Art

[0002] During industrial production processes, such as lithium battery coating, large amounts of NMP waste gas are generated. This NMP waste gas, produced by the coating machine, is not only hot but also harmful to the human body. Therefore, it must be treated to specified standards before it can be discharged. Currently, a high-tower spraying method is commonly used to treat NMP waste gas. This involves condensing and freezing the NMP waste gas before passing it through a high-tower equipped with a spraying and filtering device. During the condensation and freezing process, the NMP waste gas is recovered and discharged after passing through the spraying and filtering devices.

[0003] However, since the condensation and freezing process requires processing at a lower temperature to recover NMP with better efficiency, the temperature difference between the NMP waste gas and the outside temperature is large after passing through the spraying and filtration device, resulting in a large amount of "white mist" when the NMP waste gas comes into contact with the air at the discharge port, and the heat in these NMP waste gases is not recovered, resulting in energy waste. Utility Model Content

[0004] In order to improve the problems of white fog and energy waste existing in high towers in the related art, the utility model provides an energy-saving high tower device.

[0005] An energy-saving high-tower device includes a recovery structure, a heat exchange structure and a high-tower structure; the heat exchange structure includes a condensing main unit connected to the recovery structure and the high-tower structure, and a heat exchange component arranged on the high-tower structure; the condensing main unit is provided with a plurality of cooling surface coolers, the cooling surface coolers are filled with a heat-conducting medium, and the cooling surface coolers are connected to a medium flow pipe; the heat exchange component includes a plurality of heat exchangers arranged on the high-tower structure, and the plurality of heat exchangers are arranged along the height direction of the high-tower structure; the medium flow pipe passes through the plurality of heat exchangers.

[0006] Furthermore, the high tower structure includes a high tower body, which has a heat exchange part for cooperating with the heat exchange component; the heat exchanger includes a bottom heat exchanger and several upper heat exchangers, the bottom heat exchanger is buckled on the bottom of the heat exchange part, and the bottom heat exchanger is provided with several air holes; several upper heat exchangers are arranged above the bottom heat exchanger, and the upper heat exchangers are provided with several air holes.

[0007] Furthermore, the upper heat exchangers are evenly arranged along the height direction of the high tower body, and the upper heat exchangers have a fast passing area.

[0008] Furthermore, the heat exchange portion has a medium inlet and a medium outlet, and the plurality of upper heat exchangers are staggered; the medium flow pipe enters from the medium inlet and passes through the fast passing area and exits from the medium outlet.

[0009] Furthermore, the high tower structure also includes a filter assembly, which includes a high tower filler and a wire mesh demister arranged on the high tower body, and the high tower filler and the wire mesh demister are located below the heat exchange assembly.

[0010] Furthermore, the tower body has an air inlet and a tail outlet, the air inlet is located below the filter component, and the tail outlet is located above the heat exchange component.

[0011] Furthermore, the recovery structure includes a waste heat recovery device and a circulation processing fan, and the condensing main unit is located between the waste heat recovery device and the circulation processing fan; the waste heat recovery device is connected to an air inlet pipe and an air outlet pipe, the air outlet pipe is connected to the condensing main unit, the condensing main unit is connected to the circulation processing fan, and the circulation processing fan is connected to the air inlet.

[0012] Furthermore, the circulating treatment fan is connected to a first return air duct, the first return air duct is connected to the waste heat recovery device, and the waste heat recovery device is connected to a second return air duct for returning NMP waste gas.

[0013] The utility model has the following advantages:

[0014] 1. The utility model is an energy-saving high-tower device, in which the heat exchange structure includes a condensing main unit and a heat exchange component arranged in the high-tower structure. After passing through the recovery structure, the NMP exhaust gas will enter the condensing main unit of the heat exchange structure. The condensing main unit continuously cools and treats the NMP exhaust gas at a lower temperature. The temperature of the NMP exhaust gas decreases during this process, while the temperature of the heat-conducting medium in the condensing main unit increases. The heat-conducting medium with an increased temperature is then transported to the heat exchanger through the medium flow pipe. When the NMP exhaust gas passes through the several heat exchangers of the heat exchange component, it exchanges heat with the heat-conducting medium transported to the heat exchanger. The temperature of the NMP exhaust gas will increase to a temperature similar to the ambient temperature, while the temperature of the heat-conducting medium will decrease and be transported back to the condensing main unit. By setting up the heat exchange structure, on the one hand, the temperature of the NMP exhaust gas can be increased to avoid the generation of white mist, and on the other hand, the heat energy of the NMP exhaust gas can be further recovered to achieve an energy-saving effect.

[0015] 2. The utility model is an energy-saving high-tower device. The heat exchange component is provided with multiple heat exchangers with quick-pass zones. At the same time, the heat exchangers are staggered. The medium flow pipe passes through the quick-pass zones of these staggered heat exchangers, which can increase the contact area and contact time between the medium flow pipe and the heat exchanger, thereby ensuring that the heat exchange component operates with better heat exchange efficiency and achieving further energy saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 This is a schematic structural diagram of an energy-saving high tower device according to an embodiment of the present application;

[0018] Figure 2 This is a schematic diagram of the arrangement of the heat exchange components in the high tower structure in the embodiment of the present application;

[0019] Figure 3 This is a schematic structural diagram of the upper heat exchanger in an embodiment of the present application;

[0020] Figure 4 This is a structural diagram of the bottom heat exchanger in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 1. Recovery structure; 11. Waste heat recovery device; 111. Air inlet duct; 112. Air outlet duct; 12. Circulation treatment fan; 13. First return air duct; 14. Second return air duct; 2. Heat exchange structure; 21. Condensing main unit; 211. Cooling surface cooler; 212. Medium flow pipe; 22. Heat exchange component; 221. Bottom heat exchanger; 222. Upper heat exchanger; 2221. Rapid passage area; 3. Tower structure; 31. Tower body; 311. Air inlet; 312. Tail exhaust port; 32. Filter component; 321. Tower filler; 322. Wire mesh demister; 33. Heat exchange unit; 331. Medium inlet; 332. Medium outlet. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0025] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0027] Reference Figure 1 as well as Figure 2 An energy-saving high-tower device includes a recovery structure 1, a heat exchange structure 2, and a high-tower structure 3. When the energy-saving high-tower device is in operation, NMP waste gas is introduced into the recovery structure 1, which performs a first heat exchange recovery on the NMP waste gas. The NMP waste gas then enters the heat exchange structure 2, which condenses and recovers the NMP waste gas. The condensed and recovered NMP waste gas enters the high-tower structure 3 for filtration, then passes through the heat exchange structure 2 for heat exchange recovery again, and is finally discharged.

[0028] Specifically, the recovery structure 1 includes a waste heat recovery unit 11 and a circulating treatment fan 12. The waste heat recovery unit 11 is connected to an air inlet duct 111 and an air outlet duct 112. The air outlet duct 112 is connected to the heat exchange structure 2 and then to the circulating treatment fan 12. The circulating treatment fan 12 is connected to a first return air duct 13, which is connected to the waste heat recovery unit 11. The waste heat recovery unit 11 is connected to a second return air duct 14 for returning NMP waste gas. Under the operation of the circulating treatment fan 12, the NMP waste gas generated by the coating machine continuously passes through the waste heat recovery unit 11 for initial heat exchange, then cools down and enters the heat exchange structure 2. After passing through the heat exchange structure 2, some of the NMP waste gas is introduced into the high tower structure 3, while the remaining NMP waste gas flows back to the waste heat recovery unit 11 through the first return air duct 13 for heat exchange and temperature increase, and then flows back to the coating machine through the second return air duct 14.

[0029] The heat exchange structure 2 consists of two parts: the first is a condensing unit 21 connected to the recovery structure 1 and the tower structure 3; the second is a heat exchange assembly 22 mounted within the tower structure 3. Specifically, the condensing unit 21 is positioned between the waste heat recovery unit 11 and the circulating fan 12. The waste heat recovery unit 11 is connected to the condensing unit 21 via an outlet pipe 112, which in turn is connected to the circulating fan 12. The condensing unit 21 is equipped with several cooling condensers 211, arranged along the length of the condensing unit 21. Each cooling condenser 211 is filled with a heat transfer medium and connected to a medium flow pipe 212, which connects the cooling condenser 211 to the heat exchange assembly 22. In this embodiment, the heat transfer medium is water. The medium flow pipe 212 is equipped with a control valve for controlling the flow of the heat transfer medium, and is connected to an external medium replenishment pipe for replenishing the heat transfer medium and a cooling water tower.

[0030] Heat exchange assembly 22 includes several heat exchangers arranged along the height of tower structure 3. A medium flow pipe 212 passes through these heat exchangers. As NMP waste gas passes through the heat exchangers, they recover heat from the NMP waste gas, raising its temperature to a level close to ambient temperature. This prevents the exhaust NMP gas from generating white mist. Simultaneously, the recovered heat flows back through medium flow pipe 212 to cooling surface cooler 211, lowering its temperature and reducing the energy required for cooling. This, in turn, increases the efficiency of NMP waste gas recovery.

[0031] The tower structure 3 includes a main tower body 31, which is equipped with a filter assembly 32 and a heat exchange portion 33 for mounting the heat exchange assembly 22. Specifically, the main tower body 31 is topped with a rain cap and has an air inlet 311 and a tail outlet 312. The air inlet 311 is located at the bottom of the main tower body 31, below the filter assembly 32, while the tail outlet 312 is located above the heat exchange assembly 22. A circulating process fan 12 is connected to the air inlet 311. Driven by the circulating process fan 12, the NMP waste gas is introduced through the air inlet 311 and moves toward the tail outlet 312. The filter assembly 32 includes a tower packing 321 and a wire mesh demister 322 arranged on the tower body 31. The tower packing 321 and the wire mesh demister 322 are located below the heat exchange assembly 22 and above the air inlet 311. When the NMP waste gas enters the air inlet 311, it will be filtered through the tower packing 321 and the wire mesh demister 322 in sequence.

[0032] Reference Figure 2 、 Figure 3 as well as Figure 4 The heat exchange portion 33 is located between the filter assembly 32 and the tail outlet 312. The heat exchange portion 33 has a medium inlet 331 and a medium outlet 332. The medium flow pipe 212 is connected to the medium inlet 331 and the medium outlet 332. In this embodiment, the heat exchanger includes a bottom heat exchanger 221 and a plurality of upper heat exchangers 222. The bottom heat exchanger 221 is fastened to the bottom of the heat exchange portion 33 and has a plurality of air holes. The upper heat exchangers 222 are arranged above the bottom heat exchanger 221 and have a plurality of air holes. The upper heat exchangers 222 are evenly arranged along the height of the tower body 31. The medium flow pipe 212 passes through the upper heat exchangers 222 and the bottom heat exchanger 221 to exchange heat. It should be noted that the medium flow pipe 212 can pass through the heat exchanger directly or indirectly, that is, the medium flow pipe 212 can be directly connected to the heat exchanger filled with flowing medium for heat exchange, or the medium flow pipe 212 can be in contact with the heat exchanger for heat exchange, which can be selected according to actual needs.

[0033] In this embodiment, the heat exchanger is a gas-liquid plate heat exchanger. To ensure heat exchange efficiency within the medium flow pipe 212, the upper heat exchanger 222 has a rapid transit area 2221. Several upper heat exchangers 222 are staggered; the medium flow pipe 212 enters the medium inlet 331, passes through the rapid transit area 2221, and exits the medium outlet 332. This configuration of the heat exchange assembly 22 effectively increases the heat exchange time and contact area of the medium flow pipe 212 within the heat exchange assembly 22, thereby ensuring heat exchange efficiency.

[0034] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An energy-saving high tower device, characterized in that: The invention comprises a recovery structure (1), a heat exchange structure (2) and a high tower structure (3); the heat exchange structure (2) comprises a condensing main unit (21) connected to the recovery structure (1) and the high tower structure (3) and a heat exchange component (22) arranged on the high tower structure (3); the condensing main unit (21) is provided with a plurality of cooling surface coolers (211), the cooling surface coolers (211) are filled with a heat-conducting medium, and the cooling surface coolers (211) are connected to a medium flow pipe (212); the heat exchange component (22) comprises a plurality of heat exchangers arranged on the high tower structure (3), and the plurality of heat exchangers are arranged along the height direction of the high tower structure (3); the medium flow pipe (212) passes through the plurality of heat exchangers.

2. An energy-saving high tower device according to claim 1, characterized in that: The high tower structure (3) includes a high tower body (31), and the high tower body (31) has a heat exchange portion (33) for cooperating with the heat exchange component (22); the heat exchanger includes a bottom heat exchanger (221) and a plurality of upper heat exchangers (222), the bottom heat exchanger (221) is buckled on the bottom of the heat exchange portion (33), and the bottom heat exchanger (221) is provided with a plurality of air holes; the plurality of upper heat exchangers (222) are arranged above the bottom heat exchanger (221), and the upper heat exchangers (222) are provided with a plurality of air holes.

3. An energy-saving high tower device according to claim 2, characterized in that: The upper heat exchanger (222) is evenly arranged along the height direction of the high tower body (31), and the upper heat exchanger (222) has a fast passing area (2221).

4. The energy-saving high tower device according to claim 3, characterized in that: The heat exchange portion (33) has a medium inlet (331) and a medium outlet (332), and a plurality of the upper heat exchangers (222) are staggered. The medium flow pipe (212) enters from the medium inlet (331), passes through the fast-passing zone (2221), and exits from the medium outlet (332).

5. An energy-saving high tower device according to any one of claims 2 to 4, characterized in that: The high tower structure (3) further includes a filter assembly (32), wherein the filter assembly (32) includes a high tower filler (321) and a wire mesh demister (322) arranged on the high tower body (31), and the high tower filler (321) and the wire mesh demister (322) are located below the heat exchange assembly (22).

6. The energy-saving high tower device according to claim 5, characterized in that: The high tower body (31) has an air inlet (311) and a tail outlet (312), wherein the air inlet (311) is located below the filter assembly (32), and the tail outlet (312) is located above the heat exchange assembly (22).

7. The energy-saving high tower device according to claim 6, characterized in that: The recovery structure (1) comprises a waste heat recovery device (11) and a circulation processing fan (12), and the condensing main unit (21) is located between the waste heat recovery device (11) and the circulation processing fan (12); the waste heat recovery device (11) is connected to an air inlet pipe (111) and an air outlet pipe (112), the air outlet pipe (112) is connected to the condensing main unit (21), the condensing main unit (21) is connected to the circulation processing fan (12), and the circulation processing fan (12) is connected to the air inlet (311).

8. The energy-saving high tower device according to claim 7, characterized in that: The circulating treatment fan (12) is connected to a first return air duct (13), the first return air duct (13) is connected to the waste heat recovery device (11), and the waste heat recovery device (11) is connected to a second return air duct (14) for returning NMP waste gas.

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