CN220110746U - NMP waste gas treatment tower adopting liquid heat exchange device - Google Patents
NMP waste gas treatment tower adopting liquid heat exchange device Download PDFInfo
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- CN220110746U CN220110746U CN202321573065.6U CN202321573065U CN220110746U CN 220110746 U CN220110746 U CN 220110746U CN 202321573065 U CN202321573065 U CN 202321573065U CN 220110746 U CN220110746 U CN 220110746U
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- Prior art keywords
- heat exchange
- liquid heat
- exchange device
- nmp
- tower
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- 239000007788 liquid Substances 0.000 title claims abstract description 99
- 239000002912 waste gas Substances 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 239000007921 spray Substances 0.000 claims abstract description 59
- 239000007789 gas Substances 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 12
- 239000002699 waste material Substances 0.000 abstract description 19
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 50
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Abstract
The utility model discloses an NMP waste gas treatment tower adopting a liquid heat exchange device, which comprises a tower body, a spray assembly, an air inlet pipe and a liquid heat exchange assembly; the liquid heat exchange assembly comprises a liquid heat exchange device and a circulating spray pipeline, the liquid heat exchange device is arranged at the bottom of the tower body, and the circulating spray pipeline is connected with the liquid heat exchange device; according to the utility model, the liquid heat exchange device is arranged, so that the heat exchange between the warm water flowing through the liquid heat exchange device and the NMP waste liquid is carried out, the water temperature flowing through the liquid heat exchange device is reduced, the water flows back to the top of the tower through the circulating spray pipeline and is circulated and sprayed, and the NMP waste liquid is circulated and sprayed through the spray component.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to an NMP waste gas treatment tower adopting a liquid heat exchange device.
Background
At present, in the lithium battery industry, the treatment mode of waste gas containing NMP (N-methyl pyrrolidone) is mainly condensation freezing and high tower spray absorption. Industry specifications prescribe that the common return air content of NMP is controlled below 300PPM, the corresponding temperature should be below 20 ℃, NMP waste gas (the temperature is 12-18 ℃) after low-temperature treatment enters a high tower for spray absorption, and the NMP is absorbed by adopting a mode that water is sprayed inside the high tower by utilizing the property that NMP can be dissolved in water. In the process, because the temperature of NMP waste gas entering the high tower is lower, NMP is dissolved in spray water in the tower to form NMP waste liquid (the temperature is 15-20 ℃), and the temperature in the tower and the temperature outside the tower form a temperature difference, so that a large amount of condensed water is formed on the outer surface of the high tower, and the condensed water flows down along the outer wall of the tower, so that the phenomenon of effusion is easily caused at the bottom of the tower, and the site construction is seriously influenced. Thus, the prior art solutions have the technical disadvantage that the outer surface of the tall tower forms a large amount of condensed water and causes the bottom of the tower to form a liquid accumulation.
Disclosure of Invention
The utility model aims to provide an NMP waste gas treatment tower adopting a liquid heat exchange device, and aims to solve the technical defects that the prior art scheme has the technical defects that a large amount of condensed water is formed on the outer surface of a high tower, and liquid accumulation is caused at the bottom of the tower.
To achieve the purpose, the utility model adopts the following technical scheme:
the utility model discloses an NMP waste gas treatment tower adopting a liquid heat exchange device, which comprises a tower body, a spray assembly, an air inlet pipe and a liquid heat exchange assembly; the air inlet pipe is arranged on the side surface of the tower body; the spraying assembly is arranged at the top of the tower body; the liquid heat exchange assembly comprises a liquid heat exchange device and a circulating spray pipeline, the liquid heat exchange device is arranged at the bottom of the tower body, and the circulating spray pipeline is connected with the liquid heat exchange device; the liquid heat exchange device comprises a water inlet, a water outlet and a heat exchanger, wherein the water inlet and the water outlet are respectively arranged at the opposite distal ends of the heat exchanger.
Preferably, the heat exchanger comprises heat exchange tubes arranged side by side in a curved manner.
Preferably, the number of the liquid heat exchange devices is a plurality.
Preferably, the circulating spray pipeline comprises a spray pipe and a spray head, one end of the spray pipe is connected with the water outlet, and the other end of the spray pipe is connected with the spray head.
Preferably, the number of the spray heads is a plurality.
Preferably, the spray head is arranged at the top of the tower body.
Preferably, an air outlet is further formed in the top end of the tower body.
Preferably, an NMP concentration monitor is arranged at the air outlet.
Preferably, a filtering device is further arranged at the air inlet pipe.
Preferably, a bracket is further arranged at the bottom of the tower body.
The NMP waste gas treatment tower adopting the liquid heat exchange device comprises a tower body, a spray assembly, an air inlet pipe and a liquid heat exchange assembly; the air inlet pipe is arranged on the side surface of the tower body; the spraying assembly is arranged at the top of the tower body; the liquid heat exchange assembly comprises a liquid heat exchange device and a circulating spray pipeline, the liquid heat exchange device is arranged at the bottom of the tower body, and the circulating spray pipeline is connected with the liquid heat exchange device; the liquid heat exchange device comprises a water inlet, a water outlet and a heat exchanger, wherein the water inlet and the water outlet are respectively arranged at the opposite far ends of the heat exchanger; according to the utility model, the liquid heat exchange device is arranged, so that the temperature of the NMP waste liquid flowing through the liquid heat exchange device is increased and approaches to the room temperature, the water temperature of the NMP waste liquid flowing through the liquid heat exchange device is reduced, water flows back to the top of the tower through the circulating spray pipeline and is sprayed, NMP waste gas in the tower is fully absorbed, and the NMP waste liquid is continuously and circularly sprayed through the spray component.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing the structure of an NMP exhaust gas treatment tower according to an embodiment of the present utility model;
fig. 2 is a cross-sectional view of a liquid heat exchange device according to an embodiment of the present utility model.
Wherein: 1. a tower body; 2. a liquid heat exchange device; 21. a water inlet; 22. a water outlet; 23. a circulating spray pipeline; 231. a shower pipe; 232. a spray head; 24. a heat exchanger; 3. an air inlet pipe; 31. a filtering device; 4. a spray assembly; 5. an air outlet; 6. a bracket; 100. NMP waste liquid.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The utility model discloses an NMP waste gas treatment tower adopting a liquid heat exchange device, which is shown in figures 1 and 2, and comprises a tower body 1, a spray assembly 4, an air inlet pipe 3 and a liquid heat exchange assembly; the air inlet pipe 3 is arranged on the side surface of the tower body 1, and exhaust gas rich in NMP enters the tower body 1 from the air inlet pipe 3; the spraying assembly 4 is arranged at the top of the tower body 1; the liquid heat exchange assembly comprises a liquid heat exchange device 2 and a circulating spray pipeline 23, wherein the liquid heat exchange device 2 is arranged at the bottom of the tower body 1, specifically, the liquid heat exchange device 2 is arranged in the tower body 1, the liquid heat exchange device 2 is completely immersed in NMP waste liquid 100, so that the liquid heat exchange device 2 is fully contacted with the NMP waste liquid 100, normal-temperature water flowing through the liquid heat exchange device 2 is fully exchanged with the low-temperature NMP waste liquid 100, the temperature of the NMP waste liquid 100 is increased, and the temperature of the water flowing through the liquid heat exchange device 2 is reduced; the circulating spray pipeline 23 is connected with the liquid heat exchange device 2, the temperature of normal-temperature water flowing through the liquid heat exchange device 2 is reduced after heat exchange, and the normal-temperature water flows into the circulating spray pipeline 23 and is conveyed to the top of the tower body 1 for spraying, so that NMP gas in waste gas is fully absorbed; the liquid heat exchange device 2 comprises a water inlet 21, a water outlet 22 and a heat exchanger 24, wherein the water inlet 21 and the water outlet 22 are respectively arranged at the opposite far ends of the heat exchanger 24, specifically, normal-temperature water enters the heat exchanger 24 from the water inlet 21 and flows out from the water outlet 22, and the water inlet 21 and the water outlet 22 are arranged at the relatively far two ends of the heat exchanger 24 so as to maximize the movement track of the low-temperature water in the heat exchanger 24.
Wherein, the heat exchanger 24 comprises heat exchange pipes which are bent and arranged side by side, and normal temperature water flows through the heat exchange pipes, so that the heat exchange area with the NMP waste liquid 100 can be increased.
Specifically, the number of the liquid heat exchange devices 2 is plural, and the plurality of liquid heat exchange devices 2 are uniformly distributed at the bottom of the tower body 1 and are fully contacted with the NMP waste liquid 100.
Specifically, the circulation spray pipeline 23 includes a spray pipe 231 and a spray nozzle 232, one end of the spray pipe 231 is connected with the water outlet 22, the other end of the spray pipe 231 is connected with the spray nozzle 232, water sequentially flows through the liquid heat exchange device 2 and the spray pipe 231 and is sprayed out by the spray nozzle 232, and NMP gas is absorbed in the tower body 1.
Specifically, the number of the spray heads 232 is multiple, and the spray areas of the spray water can be effectively ensured to be larger by the multiple spray heads 232, so that the NMP waste gas is fully absorbed.
Specifically, the spray head 232 is disposed at the top of the tower body 1, and this arrangement can ensure that water has a longer spray path inside the tower body 1, so as to fully absorb NMP waste gas in the tower.
The top end of the tower body 1 is also provided with an air outlet 5, and NMP waste gas which reaches the emission standard after being absorbed is discharged from the air outlet 5.
The NMP concentration monitor (not shown) is disposed at the air outlet 5, and is capable of monitoring NMP concentration of the exhaust gas at the air outlet in real time, and if NMP concentration exceeds an emission standard, the exhaust gas is treated and then emitted.
Wherein, the air inlet pipe 3 is also provided with a filter device 31, and NMP waste gas entering the tower body 1 is pretreated by using the filter device 31, so that the content of harmful substances in the waste gas can be effectively reduced.
The bottom of the tower body 1 is further provided with a support 6, and the support 6 can effectively support the tower body 1 and prevent the tower body 1 from directly contacting with the ground to protect the tower body 1.
In a specific embodiment, NMP waste gas enters the tower body 1 from the air inlet pipe 3, normal-temperature water enters from the water inlet 21 of the liquid heat exchange device 2 and flows through the heat exchange pipeline of the heat exchanger 24, and as the temperature of the NMP waste liquid 100 is lower, the NMP waste liquid 100 exchanges heat with the normal-temperature water in the heat exchange pipeline, so that the temperature of the NMP waste liquid 100 is increased, and the water temperature in the heat exchange pipeline is reduced; then, water in the heat exchange pipeline flows back to the top of the tower body 1 through the circulating spray pipeline 23, is sprayed through the spray head 232, and is fully absorbed by NMP gas in the tower body 1 so as to meet the emission standard; the spraying device 4 always circularly sprays the NMP waste liquid 100 in the tower body 1 through a circulating pump, and fully absorbs NMP gas in the tower body 1; the NMP waste gas after the absorption is discharged from an air outlet at the top of the tower; the continuous circulation spraying of the spray assembly 4 and the circulation spraying pipeline 23 and the continuous heat exchange of the water in the liquid heat exchange device 2 lead the environmental temperature in the tower body 1 to have smaller difference with the environmental temperature outside the tower body 1, and the condensed water on the outer wall of the tower body 1 is greatly reduced.
The NMP waste gas treatment tower adopting the liquid heat exchange device comprises a tower body, a spray assembly, an air inlet pipe and a liquid heat exchange assembly; the air inlet pipe is arranged on the side surface of the tower body; the spraying assembly is arranged at the top of the tower body; the liquid heat exchange assembly comprises a liquid heat exchange device and a circulating spray pipeline, the liquid heat exchange device is arranged at the bottom of the tower body, and the circulating spray pipeline is connected with the liquid heat exchange device; the liquid heat exchange device comprises a water inlet, a water outlet and a heat exchanger, wherein the water inlet and the water outlet are respectively arranged at the opposite far ends of the heat exchanger; according to the utility model, the liquid heat exchange device is arranged, so that the heat exchange between the warm water flowing through the liquid heat exchange device and the NMP waste liquid is carried out, the temperature of the NMP waste liquid is increased and approaches to the room temperature, the temperature of the water flowing through the liquid heat exchange device is reduced, and the water flows back to the top of the tower through the circulating spray pipeline and is sprayed, so that the NMP waste gas in the tower is fully absorbed. Through continuous cyclic spraying of the spraying component and the cyclic spraying pipeline and continuous heat exchange of pure water in the heat exchanger, the difference between the ambient temperature in the tower and the ambient temperature outside the tower is smaller, and the condensed water on the outer wall of the tower is greatly reduced.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (10)
1. The NMP waste gas treatment tower adopting the liquid heat exchange device is characterized by comprising a tower body, a spray assembly, an air inlet pipe and a liquid heat exchange assembly;
the air inlet pipe is arranged on the side surface of the tower body;
the spraying assembly is arranged at the top of the tower body;
the liquid heat exchange assembly comprises a liquid heat exchange device and a circulating spray pipeline, the liquid heat exchange device is arranged at the bottom of the tower body, and the circulating spray pipeline is connected with the liquid heat exchange device;
the liquid heat exchange device comprises a water inlet, a water outlet and a heat exchanger, wherein the water inlet and the water outlet are respectively arranged at the opposite distal ends of the heat exchanger.
2. A NMP waste gas treatment tower employing liquid heat exchange means according to claim 1 wherein said heat exchanger includes curved side-by-side heat exchange tubes.
3. An NMP off-gas treatment tower employing liquid heat exchange means according to claim 1 wherein the number of liquid heat exchange means is plural.
4. The NMP exhaust gas treating tower using a liquid heat exchanger according to claim 1, wherein said circulation spray pipe includes a shower pipe and a shower head, one end of said shower pipe is connected to said water outlet, and the other end of said shower pipe is connected to said shower head.
5. The NMP exhaust gas treatment tower using a liquid heat exchanger according to claim 4, wherein the number of said spray heads is plural.
6. The NMP exhaust gas treatment tower using a liquid heat exchanger according to claim 4, wherein said spray head is disposed at the top of said tower body.
7. The NMP exhaust gas treatment tower employing the liquid heat exchange device according to claim 1, wherein an air outlet is further provided at a top end of the tower body.
8. An NMP waste gas treatment tower employing a liquid heat exchange arrangement according to claim 7, wherein an NMP concentration monitor is provided at the outlet.
9. The NMP exhaust gas treating tower with liquid heat exchanger of claim 1, wherein the air inlet pipe is further provided with a filter.
10. The NMP exhaust gas treatment tower employing a liquid heat exchange device according to claim 1, wherein the bottom of the tower body is further provided with a bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321573065.6U CN220110746U (en) | 2023-06-20 | 2023-06-20 | NMP waste gas treatment tower adopting liquid heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321573065.6U CN220110746U (en) | 2023-06-20 | 2023-06-20 | NMP waste gas treatment tower adopting liquid heat exchange device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220110746U true CN220110746U (en) | 2023-12-01 |
Family
ID=88895851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321573065.6U Active CN220110746U (en) | 2023-06-20 | 2023-06-20 | NMP waste gas treatment tower adopting liquid heat exchange device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220110746U (en) |
-
2023
- 2023-06-20 CN CN202321573065.6U patent/CN220110746U/en active Active
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