CN211987882U - Tail gas processing apparatus of N-methyl pyrrolidone production - Google Patents
Tail gas processing apparatus of N-methyl pyrrolidone production Download PDFInfo
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- CN211987882U CN211987882U CN201922473350.0U CN201922473350U CN211987882U CN 211987882 U CN211987882 U CN 211987882U CN 201922473350 U CN201922473350 U CN 201922473350U CN 211987882 U CN211987882 U CN 211987882U
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- filter
- tail gas
- filter screen
- production
- filtering
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Abstract
The utility model relates to a methyl pyrrolidone application provides a tail gas processing apparatus of N-methyl pyrrolidone production for solve the exhaust emission problem in the methyl pyrrolidone application. The utility model provides a tail gas treatment device for N-methyl pyrrolidone production, which comprises an absorption device, a storage device, a defoaming device and a filtering device, wherein the air outlet of the absorption device is connected with a fan, the fan is connected with the storage device, the storage device is connected with the defoaming device, and the defoaming device is connected with the filtering device; the device comprises an absorption device, and is characterized in that a nozzle, a filter screen and a support are arranged in the absorption device, the support is connected with the nozzle, the filter screen is arranged below the support, a water outlet of the nozzle faces towards an air inlet of the absorption device, and the nozzle is connected with a water pump through a water pipe. The methyl pyrrolidone is thoroughly separated from the gas, and the separation effect is improved.
Description
Technical Field
The utility model relates to a methyl pyrrolidone application, concretely relates to tail gas processing apparatus of N-methyl pyrrolidone production.
Background
N-methylpyrrolidone, a chinese alias: NMP; 1-methyl-2-pyrrolidone; n-methyl-2-pyrrolidone. Colorless transparent oily liquid, slightly having amine odor. Low volatility, good thermal stability and chemical stability, and can be volatilized with water vapor. It has hygroscopic property. Is sensitive to light. It is easily soluble in water, ethanol, diethyl ether, acetone, ethyl acetate, chloroform and benzene, and can dissolve most organic and inorganic compounds, polar gas, natural and synthetic high molecular compounds. N-methyl pyrrolidone is widely applied to the industries of lithium batteries, medicines, pesticides, pigments, cleaning agents, insulating materials and the like. The performance of the material is as follows:
1. colorless liquid with ammonia smell and low toxicity. Can be dissolved in most organic solvents such as ether and acetone. Can dissolve most organic and inorganic compounds, polar gases, natural and synthetic high molecular compounds.
2. The chemical properties are as follows: is stable in neutral solution. 50% -70% of the hydrolysis occurs after 8 hours in 4% sodium hydroxide solution. Gradually hydrolyzed in concentrated hydrochloric acid to generate 4-methylamino butyric acid CH3NH(CH2)3COOH. As a result of the reaction of the carbonyl group, a ketal or thiopyrrolidone may be formed.
3. Reacts with olefin in the presence of alkali catalyst to generate alkylation reaction at 3 rd position. N-methyl pyrrolidone is alkalescent and can generate hydrochloride. Adducts with heavy metal salts, e.g. with nickel bromide, heated to 150 ℃ to form NiBr2(C5H9ON)3Melting point 105 ℃.
The tail gas contains a certain amount of impurities, such as non-volatile matters generated in hot air drying and particles falling on equipment pipelines.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem provide a tail gas processing apparatus of N-methyl pyrrolidone production for the exhaust emission problem in the methyl pyrrolidone application.
In order to solve the technical problem, the utility model provides a technical scheme does:
a tail gas treatment device for N-methyl pyrrolidone production comprises an absorption device, a storage device, a defoaming device and a filtering device, wherein an air outlet of the absorption device is connected with a fan, the fan is connected with the storage device, the storage device is connected with the defoaming device, and the defoaming device is connected with the filtering device; the absorption device is internally provided with a nozzle, a filter screen and a bracket, the bracket is connected with the nozzle, the filter screen is arranged below the bracket, the water outlet of the nozzle faces to the air inlet of the absorption device, and the nozzle is connected with a water pump through a water pipe; the filter screen includes two at least filtering layers, one of them the filtering layer is provided with the connecting axle, and correspondingly, another the filtering layer is provided with the spread groove, two the filtering layer passes through the connecting axle and the spread groove is connected.
The methyl pyrrolidone is absorbed by water spray and retained in the circulating liquid of the absorption tower, and the circulating liquid needs to be replaced after being used for multiple times; the storage device distills the absorbed tail gas and further processes the tail gas; the defoaming device and the filtering device further treat the tail gas to avoid air pollution.
The methyl pyrrolidone is thoroughly separated from the gas, and the separation effect is improved.
Preferably, the filter layer comprises a metal mesh and a frame, the metal mesh being disposed within the frame.
Preferably, the filter screen comprises a first filter layer, a second filter layer and a third filter layer, wherein the bottom of the first filter layer is provided with 4 connecting shafts, and correspondingly, the second filter layer is provided with 4 connecting grooves; the second filtering layer bottom is provided with 4 connecting axles, correspondingly, be provided with 4 spread grooves on the third filtering layer.
Preferably, the projection of the filter screen on the horizontal plane is rectangular.
Preferably, the connecting shafts are arranged at four end points of the filter layer.
Preferably, the connection grooves are provided at four end points of the filter layer.
Preferably, the pore diameter of the metal mesh of the first filter layer is larger than that of the metal mesh of the second filter layer, and the pore diameter of the second filter layer is larger than that of the metal mesh of the third filter layer. Optimize the structure of filter screen, the filter screen that the different apertures of multilayer piled up can improve the dwell time of spraying liquid on the filter screen surface, and then improves the contact time of tail gas with the spraying liquid, has increased methyl pyrrolidone by absorbent efficiency, and a plurality of filtering layers are separable, can regularly take out the filter screen, wash, especially can wash remaining solid residue between the filter screen.
Preferably, a reprocessing filter screen is arranged in the filtering device; the retreatment filter screen comprises a frame and a filter screen assembly, wherein the filter screen assembly is formed by stacking a plurality of filter screens.
Preferably, the filter screen subassembly is the range upon range of constitution of 3 filter screens, the filter screen is provided with a plurality of kinks. The stacked filter screens can effectively take out other pollutants in the tail gas.
Compared with the prior art, the utility model discloses the beneficial effect who has does: the methyl pyrrolidone is thoroughly separated from the gas, so that the separation effect is improved; meanwhile, other pollutants in the tail gas can be effectively removed, the emission is up to the standard, and the pollution to the air is reduced; the storage device is used for separating liquid drops in the treated tail gas from gas.
Drawings
FIG. 1 is a schematic diagram of a tail gas treatment device for N-methyl pyrrolidone production.
Fig. 2 is a schematic view of an absorption device.
Fig. 3 is a schematic view of a screen.
Fig. 4 is another schematic view of a screen.
Figure 5 is a schematic view of a reprocessed screen.
Fig. 6 is a schematic view of a screen assembly.
Detailed Description
The following examples are further illustrative of the present invention and are not intended to be limiting thereof.
Example 1
A tail gas treatment device for N-methylpyrrolidone production comprises an absorption device 1, a storage device 2, a defoaming device 3 and a filtering device 4, wherein an air outlet 12 of the absorption device 1 is connected with a fan 5, the fan 5 is connected with the storage device 2, the storage device 2 is connected with the defoaming device 3, and the defoaming device 3 is connected with the filtering device 4; a nozzle 13, a filter screen 15 and a support 14 are arranged in the absorption device 1, the support 14 is connected with the nozzle 15, the filter screen 15 is arranged below the support 14, a water outlet of the nozzle 13 faces to an air inlet 11 of the absorption device 1, and the nozzle 13 is connected with a water pump 16 through a water pipe 17; the filter screen 15 comprises a first filter layer 155, a second filter layer 156 and a third filter layer 157, wherein the bottom of the first filter layer 155 is provided with 4 connecting shafts, and correspondingly, the second filter layer 156 is provided with 4 connecting grooves; the bottom of the second filtering layer 156 is provided with 4 connecting shafts, and correspondingly, the third filtering layer 157 is provided with 4 connecting grooves. The filter layer includes a metal mesh 152 and a frame 151, and the metal mesh 152 is disposed in the frame 151. The projection of the filter screen 15 on the horizontal plane is rectangular. The connection shafts 153 are provided at four end points of the filter layers 155, 156. The connecting grooves 154 are provided at four ends of the filter layers 156, 157. The pore size of the metal mesh of the first filter layer 155 is larger than that of the metal mesh of the second filter layer 156, and the pore size of the second filter layer 156 is larger than that of the metal mesh of the third filter layer 157. A reprocessing filter screen 41 is arranged in the filtering device 4; the reprocessing filter screen 41 comprises a frame 42 and a filter screen assembly 43, wherein the filter screen assembly 43 is formed by stacking 3 filter screens 431. The filter screen assembly 43 is formed by stacking 3 filter screens 431, and the filter screens 431 are provided with a plurality of bending parts 432.
The methyl pyrrolidone is absorbed by water spray and retained in the circulating liquid of the absorption tower, and the circulating liquid needs to be replaced after being used for multiple times; the storage device distills the absorbed tail gas and further processes the tail gas; the defoaming device and the filtering device further treat the tail gas to avoid air pollution.
The methyl pyrrolidone is thoroughly separated from the gas, and the separation effect is improved. Optimize the structure of filter screen, the filter screen that the different apertures of multilayer piled up can improve the dwell time of spraying liquid on the filter screen surface, and then improves the contact time of tail gas with the spraying liquid, has increased methyl pyrrolidone by absorbent efficiency, and a plurality of filtering layers are separable, can regularly take out the filter screen, wash, especially can wash remaining solid residue between the filter screen. The stacked filter screens can effectively take out other pollutants in the tail gas.
Example 2
A tail gas treatment device for N-methylpyrrolidone production comprises an absorption device 1, a storage device 2, a defoaming device 3 and a filtering device 4, wherein an air outlet 12 of the absorption device 1 is connected with a fan 5, the fan 5 is connected with the storage device 2, the storage device 2 is connected with the defoaming device 3, and the defoaming device 3 is connected with the filtering device 4; a nozzle 13, a filter screen 15 and a support 14 are arranged in the absorption device 1, the support 14 is connected with the nozzle 15, the filter screen 15 is arranged below the support 14, a water outlet of the nozzle 13 faces to an air inlet 11 of the absorption device 1, and the nozzle 13 is connected with a water pump 16 through a water pipe 17; the filter screen 15 includes at least two filter layers, one of which is provided with a connecting shaft 153, correspondingly, the other is provided with a connecting groove 154, and two of which are connected through the connecting shaft 153 and the connecting groove 154. The filter layer includes a metal mesh 152 and a frame 151, and the metal mesh 152 is disposed in the frame 151. The filter screen 15 includes first filter layer 155, second filter layer 156, the bottom of first filter layer 155 is provided with 4 connecting axles, correspondingly, be provided with 4 spread grooves on the second filter layer 156. The projection of the filter screen 15 on the horizontal plane is rectangular. The connection shafts 153 are provided at four ends of the filter layer 155. The connection grooves 154 are disposed at four ends of the filter layer 156. The pore size of the metal mesh of the first filter layer 155 is larger than that of the metal mesh of the second filter layer 156, and the pore size of the second filter layer 156 is larger than that of the metal mesh of the third filter layer 157. A reprocessing filter screen 41 is arranged in the filtering device 4; the reprocessing filter screen 41 comprises a frame 42 and a filter screen assembly 43, wherein the filter screen assembly 43 is formed by stacking 3 filter screens 431. The filter screen assembly 43 is formed by stacking 3 filter screens 431, and the filter screens 431 are provided with a plurality of bending parts 432.
The above detailed description is specific to possible embodiments of the present invention, and the above embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included within the scope of the present invention.
Claims (9)
1. The tail gas treatment device for N-methylpyrrolidone production is characterized by comprising an absorption device, a storage device, a defoaming device and a filtering device, wherein an air outlet of the absorption device is connected with a fan, the fan is connected with the storage device, the storage device is connected with the defoaming device, and the defoaming device is connected with the filtering device; the absorption device is internally provided with a nozzle, a filter screen and a bracket, the bracket is connected with the nozzle, the filter screen is arranged below the bracket, the water outlet of the nozzle faces to the air inlet of the absorption device, and the nozzle is connected with a water pump through a water pipe; the filter screen includes two at least filtering layers, one of them the filtering layer is provided with the connecting axle, and correspondingly, another the filtering layer is provided with the spread groove, two the filtering layer passes through the connecting axle and the spread groove is connected.
2. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 1, wherein the filtering layer comprises a metal mesh and a frame, and the metal mesh is arranged in the frame.
3. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 2, wherein the filter screen comprises a first filter layer, a second filter layer and a third filter layer, the bottom of the first filter layer is provided with 4 connecting shafts, and correspondingly, the second filter layer is provided with 4 connecting grooves; the second filtering layer bottom is provided with 4 connecting axles, correspondingly, be provided with 4 spread grooves on the third filtering layer.
4. The device for treating the tail gas generated in the production of N-methylpyrrolidone according to claim 3, wherein the projection of the filter screen on the horizontal plane is rectangular.
5. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 4, wherein the connecting shafts are arranged at four end points of the filter layer.
6. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 4, wherein the connecting grooves are arranged at four end points of the filter layer.
7. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 3, wherein the pore size of the metal mesh of the first filter layer is larger than that of the metal mesh of the second filter layer, and the pore size of the second filter layer is larger than that of the metal mesh of the third filter layer.
8. The device for treating the tail gas generated in the production of the N-methylpyrrolidone according to claim 1, wherein a retreatment filter screen is arranged in the filtering device; the retreatment filter screen comprises a frame and a filter screen assembly, wherein the filter screen assembly is formed by stacking a plurality of filter screens.
9. The device for treating tail gas generated in the production of N-methylpyrrolidone according to claim 8, wherein the filter screen assembly is formed by stacking 3 filter screens, and the filter screens are provided with a plurality of bending parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922473350.0U CN211987882U (en) | 2019-12-31 | 2019-12-31 | Tail gas processing apparatus of N-methyl pyrrolidone production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922473350.0U CN211987882U (en) | 2019-12-31 | 2019-12-31 | Tail gas processing apparatus of N-methyl pyrrolidone production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211987882U true CN211987882U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922473350.0U Expired - Fee Related CN211987882U (en) | 2019-12-31 | 2019-12-31 | Tail gas processing apparatus of N-methyl pyrrolidone production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211987882U (en) |
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2019
- 2019-12-31 CN CN201922473350.0U patent/CN211987882U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201124 Termination date: 20211231 |