CN215027500U - N-methylaniline synthesis tail gas purification device - Google Patents
N-methylaniline synthesis tail gas purification device Download PDFInfo
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- CN215027500U CN215027500U CN202121273379.5U CN202121273379U CN215027500U CN 215027500 U CN215027500 U CN 215027500U CN 202121273379 U CN202121273379 U CN 202121273379U CN 215027500 U CN215027500 U CN 215027500U
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- tail gas
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- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000000746 purification Methods 0.000 title claims abstract description 26
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 18
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 165
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 153
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 124
- 238000001179 sorption measurement Methods 0.000 claims abstract description 59
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 43
- 238000003780 insertion Methods 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 33
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 abstract description 20
- 230000007613 environmental effect Effects 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 92
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011012 sanitization Methods 0.000 description 3
- 241001631457 Cannula Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a synthetic tail gas cleanup unit of N-methylaniline belongs to the tail gas treatment field. The utility model discloses a N-methylaniline synthesis tail gas purification device, which comprises a first-stage water absorption tank, a second-stage water absorption tank and an active carbon absorption tank, wherein the first-stage water absorption tank and the second-stage water absorption tank are respectively provided with an air inlet pipe, the top air outlet of the first-stage water absorption tank is connected with the second-stage air inlet pipe of the second-stage water absorption tank through a first connecting pipe, the top air outlet of the second-stage water absorption tank is connected with the air inlet of the active carbon absorption tank through a second connecting pipe, and after passing through the two-stage water absorption tank, the methanol in the tail gas can be ensured to be cleaned, meanwhile, the activated carbon adsorption tank can ensure that aniline in tail gas is completely adsorbed, reduce corrosivity and peculiar smell of the tail gas synthesized by N-methylaniline, provide reliable purification treatment for subsequent detection and emission of the tail gas synthesized by N-methylaniline, have high safety and reliability, and realize the purposes of environmental protection and clean production.
Description
Technical Field
The utility model relates to a tail gas purification device, more specifically say, relate to a synthetic tail gas purification device of N-methylaniline.
Background
In the petrochemical plant, the reaction device has more byproducts due to the influence of catalyst selectivity, conversion rate and the like. Especially some non-condensable gas by-products, the emission can bring out peculiar smell to cause environmental pollution, and meanwhile, the flammable gas by-product also has flammability, and even can generate potential safety hazard if the emission is improper. With the development of the existing industrial economy and the contradiction between social environment and safety, the requirements of people on safe and environment-friendly disposal of the gases are higher and higher, and particularly, the environmental protection and safety requirements of the state on the chemical industry are stricter and stricter due to endless safety and environment-friendly accidents in recent years. Under such a situation, each enterprise continuously perfects its own security facilities in order to survive and improve the existing security conditions.
In the process of burning the tail gas generated in the synthesis of N-methylaniline, an oxygen content detector needs to be installed according to the safety requirement, but because the facility detects a small amount of gas, the gas is not reasonably treated all the time. With the regulation of great environmental protection, it was found that this way of detecting gas emissions has the following drawbacks:
1. although the synthesis tail gas is small in amount, the synthesis tail gas is untreated and has serious peculiar smell;
2. the synthetic tail gas contains trace methanol and aniline, so the synthetic tail gas has certain corrosivity, and the treatment modes of the methanol and the aniline are different;
3. the gas directly enters an online oxygen content detector, so that the silica gel needs to be frequently replaced, and meanwhile, a silica gel plastic tank is seriously corroded, so that the smell is leaked;
4. the pressure of the synthetic tail gas is only 10-20 KPa, so the water seal height is strictly controlled, otherwise the gas passing resistance is influenced, and the detection effect is influenced.
Therefore, there is a need for an environmentally friendly, safe and simple to operate synthesis tail gas purification device for oxygen content analysis.
Disclosure of Invention
1. Technical problem to be solved by the utility model
The utility model aims to solve the above-mentioned problem that the synthetic tail gas treatment of current N-methylaniline exists, provide a synthetic tail gas purification device of N-methylaniline, adopt the technical scheme of the utility model, through the two-stage water absorption jar after, can ensure the methyl alcohol sanitization in the tail gas, can ensure simultaneously through the active carbon adsorption jar that the aniline in the tail gas is adsorbed completely, reduced the corrosivity and the peculiar smell of the synthetic tail gas of N-methylaniline, provide reliable purification treatment for follow-up detection and the emission of tail gas, fail safe nature is high, realized environmental protection and cleaner production's purpose, have advantages such as safety, environmental protection, easy operation convenience.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model discloses a synthetic tail gas cleanup unit of N-methylaniline, including one-level water absorption jar, second grade water absorption jar and activated carbon adsorption jar, one-level water absorption jar in be equipped with the one-level intubate that admits air that inserts inside, second grade water absorption jar in be equipped with the second grade intubate that admits air that inserts inside, the one-level intubate that admits air be connected with the intake pipe through the admission valve, the top gas outlet of one-level water absorption jar be connected with the second grade water absorption jar through the second grade intubate of first connecting pipe, the top gas outlet of second grade water absorption jar be connected with activated carbon adsorption jar's air inlet through the second connecting pipe, the top gas outlet of one-level water absorption jar be equipped with the one-level filter screen, the top gas outlet of second grade water absorption jar be equipped with the second grade filter screen.
Furthermore, the lateral wall of the first-level water absorption tank is provided with a first-level liquid level meter lower interface and a first-level liquid level meter upper interface, and the lateral wall of the second-level water absorption tank is provided with a second-level liquid level meter lower interface and a second-level liquid level meter upper interface.
Furthermore, the distance H from the lower pipe orifice of the primary air inlet insertion pipe to the bottom of the primary water absorption tank150-100 mm; the distance H from the lower pipe orifice of the secondary air inlet insertion pipe to the bottom of the secondary water absorption tank2Is 50 to 100 mm.
Furthermore, the liquid levels of the primary water absorption tank and the secondary water absorption tank are controlled to be 300-500 mm, and the height of the upper cavities of the primary water absorption tank and the secondary water absorption tank is 300-500 mm.
Furthermore, the bottom of the first-stage water absorption tank is also provided with a first-stage absorption tank water inlet valve and a first-stage absorption tank water discharge valve respectively, and the bottom of the second-stage water absorption tank is also provided with a second-stage absorption tank water inlet valve and a second-stage absorption tank water discharge valve respectively.
Furthermore, activated carbon is filled in the activated carbon adsorption tank, a first pipeline filter is arranged at an air inlet of the activated carbon adsorption tank, and a second pipeline filter is arranged at an air outlet of the activated carbon adsorption tank.
Furthermore, the top of the activated carbon adsorption tank is provided with an upper cover plate, and the bottom of the activated carbon adsorption tank is provided with a lower cover plate.
Furthermore, the air inlet of the activated carbon adsorption tank is positioned at the lower part of the activated carbon adsorption tank, and the air outlet of the activated carbon adsorption tank is positioned at the upper part of the activated carbon adsorption tank.
Furthermore, the first connecting pipe and the second connecting pipe are corrugated hoses.
Furthermore, two first-stage air inlet insertion pipes are arranged in the first-stage water absorption tank, and the two first-stage air inlet insertion pipes are respectively connected with corresponding air inlet pipes through air inlet valves.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:
(1) the utility model discloses a N-methylaniline synthetic tail gas purification device, which comprises a first-stage water absorption tank, a second-stage water absorption tank and an active carbon absorption tank, wherein a first-stage air inlet pipe inserted into the first-stage water absorption tank is arranged in the first-stage water absorption tank, a second-stage air inlet pipe inserted into the second-stage water absorption tank is arranged in the second-stage water absorption tank, the first-stage air inlet pipe is connected with an air inlet pipe through an air inlet valve, a top air outlet of the first-stage water absorption tank is connected with the second-stage air inlet pipe of the second-stage water absorption tank through a first connecting pipe, a top air outlet of the second-stage water absorption tank is connected with an air inlet of the active carbon absorption tank through a second connecting pipe, methanol in tail gas can be ensured to be cleaned through the two-stage water absorption tank, meanwhile, the aniline in the tail gas can be ensured to be completely adsorbed through the active carbon absorption tank, the corrosiveness and the peculiar smell of the N-methylaniline synthetic tail gas are reduced, the method provides reliable purification treatment for subsequent detection and discharge of the tail gas generated in the synthesis of N-methylaniline, has high safety and reliability, realizes the purposes of environmental protection and clean production, and has the advantages of safety, environmental protection, simple and convenient operation and the like;
(2) the utility model discloses a N-methylaniline synthesizes tail gas cleanup unit, still be equipped with the first-order level gauge lower interface and the first-order level gauge upper interface that are used for installing the level gauge on the lateral wall of its first-order water absorption tank, still be equipped with the second-order level gauge lower interface and the second-order level gauge upper interface that are used for installing the level gauge on the lateral wall of second-order water absorption tank, be convenient for install the level gauge on the water absorption tank, be convenient for the control of the interior liquid level of water absorption tank;
(3) the utility model discloses a synthetic tail gas cleanup unit of N-methylaniline, one of which upgrades the distance H of the lower mouth of gas intubate apart from one-level water absorption tank bottoms1Is 50-100 mm, and the distance H from the lower pipe orifice of the secondary air inlet insertion pipe to the bottom of the secondary water absorption tank250-100 mm; the gas inlet insertion pipe is ensured to be immersed in the water absorption tank, and meanwhile, the gas can be ensured to stably enter the water absorption tank; simultaneously, the liquid level control of one-level water absorption tank and second grade water absorption tank is at 300 ~ 500mm, can ensure that the resistance of water does not influence the velocity of flow of tail gas, and the upper portion cavity height of one-level water absorption tank and second grade water absorption tank is 300 ~ 500mm, combines the filter screen that top gas outlet department set up, not only can reduce the velocity of flow of handling back gas, ensures simultaneously that gas can not take out the water droplet, is convenient for to the pair of gas outlet portCarrying out subsequent oxygen content detection on the tail gas;
(4) the utility model discloses a N-methylaniline synthesizes tail gas cleanup unit, the bottom of its primary water absorption jar still is equipped with first-order absorption jar water intaking valve and first-order absorption jar drain valve respectively, the bottom of second-order water absorption jar still is equipped with second-order absorption jar water intaking valve and second-order absorption jar drain valve respectively, be convenient for to water injection and drainage in the absorption jar, easy and convenient operation;
(5) the utility model discloses a N-methylaniline synthesizes tail gas cleanup unit, its active carbon adsorption jar intussuseption is filled with active carbon, and the air inlet department of active carbon adsorption jar is equipped with first pipeline filter, and the air outlet department of active carbon adsorption jar is equipped with second pipeline filter, can fully filter and absorb aniline in the tail gas, has guaranteed that the gas emission is free from extraneous odour;
(6) the utility model discloses a N-methylaniline synthesizes tail gas cleanup unit, its activated carbon adsorption tank's top is installed the upper cover plate, and activated carbon adsorption tank's bottom is installed the lower cover plate, is convenient for the activated carbon in the activated carbon adsorption tank to tear open and trade, and simple structure is convenient, long service life;
(7) the utility model discloses a N-methylaniline synthesizes tail gas cleanup unit, its active carbon adsorption jar's air inlet is located the lower part of active carbon adsorption jar, and the active carbon adsorption jar's gas outlet is located the upper portion of active carbon adsorption jar, makes the gas flow from bottom to top in the active carbon adsorption jar, is more convenient for gas flow, guarantees the tail gas flow velocity, improves gas adsorption stability;
(8) the utility model discloses a N-methylaniline synthesis tail gas purification device, the first connecting pipe and the second connecting pipe are corrugated hoses, so that the connection between the first-stage water absorption tank and the second-stage water absorption tank and between the second-stage water absorption tank and the activated carbon adsorption tank is more flexible and convenient;
(9) the utility model discloses a synthetic tail gas purification device of N-methylaniline, its one of which upgrades the intubate and is equipped with two in one-level water absorption tank, and two one-level intubate that admit air are connected with the intake pipe that corresponds through the admission valve respectively, can insert two way N-methylaniline synthetic tail gas simultaneously, have improved tail gas purification treatment efficiency.
Drawings
Fig. 1 is a structural schematic diagram of the N-methylaniline synthesized tail gas purification device of the present invention.
The reference numerals in the schematic drawings illustrate:
1. a primary water absorption tank; 1-1, a first-level air inlet cannula; 1-2, a first-level filter screen; 1-3, a lower interface of a first-level liquid level meter; 1-4, an upper interface of a first-level liquid level meter; 1-5, a water inlet valve of a first-stage absorption tank; 1-6, a drainage valve of the first-stage absorption tank; 1-7, an air inlet valve; 2. a secondary water absorption tank; 2-1, a secondary air inlet cannula; 2-2, a secondary filter screen; 2-3, a lower interface of a secondary liquid level meter; 2-4, connecting the upper interface of the secondary liquid level meter; 2-5, a water inlet valve of a secondary absorption tank; 2-6, a drain valve of the secondary absorption tank; 3. an activated carbon adsorption tank; 3-1, activated carbon; 3-2, a first pipeline filter; 3-3, a second pipeline filter; 3-4, an upper cover plate; 3-5, a lower cover plate; 4. an air inlet pipe; 5. a first connecting pipe; 6. a second connecting pipe.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
[ examples ]
Referring to fig. 1, the device for purifying N-methylaniline synthesized tail gas comprises a primary water absorption tank 1, a secondary water absorption tank 2 and an activated carbon absorption tank 3, wherein absorption liquid such as water is filled in the primary water absorption tank 1 and the secondary water absorption tank 2, a primary air inlet pipe 1-1 inserted into the primary water absorption tank 1 is arranged in the primary water absorption tank 1 to form a primary water seal, a secondary air inlet pipe 2-1 inserted into the secondary water absorption tank 2 is arranged in the secondary water absorption tank 2 to form a secondary water seal, the primary air inlet pipe 1-1 is connected with an air inlet pipe 4 through an air inlet valve 1-7, a top air outlet of the primary water absorption tank 1 is connected with the secondary air inlet pipe 2-1 of the secondary water absorption tank 2 through a first connecting pipe 5, a top air outlet of the secondary water absorption tank 2 is connected with an air inlet of the activated carbon absorption tank 3 through a second connecting pipe 6, a first-stage filter screen 1-2 is arranged at the air outlet at the top of the first-stage water absorption tank 1, and a second-stage filter screen 2-2 is arranged at the air outlet at the top of the second-stage water absorption tank 2. N-methylaniline synthetic tail gas is input by an air inlet pipe 4, is mixed with absorption liquid in a primary water absorption tank 1 through a primary air inlet pipe 1-1, is absorbed and removed with methanol in the N-methylaniline synthetic tail gas, enters the upper part of the primary water absorption tank 1, is filtered by a primary filter screen 1-2 to be dripped, enters a secondary water absorption tank 2 through a first connecting pipe 5, is mixed with the absorption liquid in the secondary water absorption tank 2 through a secondary air inlet pipe 2-1, is further absorbed and removed with methanol in the N-methylaniline synthetic tail gas, ensures that the methanol in the tail gas is completely absorbed, then enters the upper part of the secondary water absorption tank 2, is filtered by the secondary filter screen 2-2 to be dripped, enters an active carbon adsorption tank 3 through a second connecting pipe 6, and is removed with aniline in the tail gas by the active carbon adsorption tank 3, the tail gas has no peculiar smell, and the gas outlet of the active carbon adsorption tank 3 is connected with a subsequent oxygen content analyzer or is emptied. Through behind the two-stage water absorption jar, can ensure the methyl alcohol sanitization in the tail gas, can ensure simultaneously that aniline in the tail gas is adsorbed completely through activated carbon adsorption jar 3, has reduced corrosivity and the peculiar smell of the synthetic tail gas of N-methylaniline, provides reliable purification treatment for follow-up detection and the emission of tail gas, and fail safe nature is high, has realized environmental protection and cleaner production's purpose, has advantages such as safety, environmental protection, easy operation convenience.
As shown in fig. 1, in order to facilitate the control of the liquid level in the absorption tank, a first-level liquid level meter lower interface 1-3 and a first-level liquid level meter upper interface 1-4 for installing a liquid level meter are further arranged on the side wall of the first-level water absorption tank 1, an opening and closing valve is respectively arranged at the first-level liquid level meter lower interface 1-3 and the first-level liquid level meter upper interface 1-4, and the upper and lower interfaces of the liquid level meter are respectively connected with the first-level liquid level meter upper interface 1-4 and the first-level liquid level meter lower interface 1-3; the side wall of the second-level water absorption tank 2 is also provided with a second-level liquid level meter lower interface 2-3 and a second-level liquid level meter upper interface 2-4, the second-level liquid level meter lower interface 2-3 and the second-level liquid level meter upper interface 2-4 are respectively provided with an on-off valve, and the upper interface and the lower interface of the liquid level meter are respectively connected with the second-level liquid level meter lower interface 2-3 and the second-level liquid level meter upper interface 2-4, so that the liquid level meter can be conveniently installed on the water absorption tank, and the liquid level in the water absorption tank can be conveniently controlled. In order to ensure the stable mixing of the tail gas and the absorption liquid in the absorption tank, in the embodiment, the lower pipe orifice of the primary air inlet insertion pipe 1-1 is away from the bottom of the primary water absorption tank 1Distance H of1Preferably 50-100 mm; the distance H from the lower pipe orifice of the secondary air inlet insertion pipe 2-1 to the bottom of the secondary water absorption tank 22Preferably 50-100 mm, and ensures that gas can stably enter the water absorption tank and be fully mixed with absorption liquid while ensuring that the gas inlet insertion pipe is immersed in the water absorption tank, so that methanol in the N-methylaniline synthetic tail gas is completely absorbed. In addition, the preferred control of liquid level of one-level water absorption jar 1 and second grade water absorption jar 2 is at 300 ~ 500mm, can ensure that the resistance of water does not influence the gaseous velocity of flow of tail gas, and the high preferred 300 ~ 500mm of upper portion cavity of one-level water absorption jar 1 and second grade water absorption jar 2, combine the filter screen that the gas outlet department set up in absorption tank top, not only can reduce the velocity of flow of handling back gas, ensure simultaneously that gas can not take over the water droplet, be convenient for carry out follow-up oxygen content to tail gas and detect.
As shown in fig. 1, in order to facilitate filling or discharging of absorption liquid in the absorption tank, the bottom of the first-stage water absorption tank 1 is further provided with a first-stage absorption tank water inlet valve 1-5 and a first-stage absorption tank water discharge valve 1-6, the bottom of the second-stage water absorption tank 2 is further provided with a second-stage absorption tank water inlet valve 2-5 and a second-stage absorption tank water discharge valve 2-6, the first-stage absorption tank water inlet valve 1-5 and the second-stage absorption tank water inlet valve 2-5 are respectively connected with a water inlet pipe, so that absorption liquid can be conveniently filled into the first-stage water absorption tank 1 and the second-stage water absorption tank 2, the first-stage absorption tank water discharge valve 1-6 and the second-stage absorption tank water discharge valve 2-6 are respectively connected with a water discharge pipe, so that absorption liquid in the first-stage water absorption tank 1 and the second-stage water absorption tank 2 can be conveniently discharged outwards, and the operation is simple and convenient. Activated carbon 3-1 is filled in the activated carbon adsorption tank 3, a first pipeline filter 3-2 is arranged at an air inlet of the activated carbon adsorption tank 3, a second pipeline filter 3-3 is arranged at an air outlet of the activated carbon adsorption tank 3, the first pipeline filter 3-2 can filter out impurities such as water and the like in the air, the second pipeline filter 3-3 can filter out activated carbon particles carried in the air, and aniline in tail gas can be fully filtered and absorbed by the activated carbon 3-1, so that the gas emission is free from foreign odor. The top of the activated carbon adsorption tank 3 is provided with an upper cover plate 3-4, the bottom of the activated carbon adsorption tank 3 is provided with a lower cover plate 3-5, specifically, the activated carbon adsorption tank 3 is of a cylindrical structure, flanges are arranged at the upper end and the lower end of the activated carbon adsorption tank 3, and the upper cover plate 3-4 and the lower cover plate 3-5 are respectively arranged at the top and the bottom of the activated carbon adsorption tank 3 through flange structures, so that the upper end and the lower end of the activated carbon adsorption tank 3 are sealed. In this embodiment, the air inlet of the above-mentioned activated carbon adsorption tank 3 is located at the lower part of the activated carbon adsorption tank 3, and the air outlet of the activated carbon adsorption tank 3 is located at the upper part of the activated carbon adsorption tank 3, so that the air flows from bottom to top in the activated carbon adsorption tank 3, the flow of the air is facilitated, the flow rate of the tail gas is ensured, and the stability of the air adsorption is improved.
In this embodiment, the first connecting pipe 5 and the second connecting pipe 6 preferably adopt corrugated hoses, so that the connection between the primary water absorption tank 1 and the secondary water absorption tank 2 and the connection between the secondary water absorption tank 2 and the activated carbon adsorption tank 3 are more flexible and convenient. Further, in one embodiment, two primary air inlet cannulas 1-1 are arranged in the primary water absorption tank 1, and the two primary air inlet cannulas 1-1 are respectively connected with the corresponding air inlet pipes 4 through the air inlet valves 1-7, so that two paths of N-methylaniline synthetic tail gas can be simultaneously connected, and the tail gas purification treatment efficiency is improved.
The utility model discloses a synthetic tail gas cleanup unit of N-methylaniline, through behind the two-stage water absorption jar, can ensure the methyl alcohol sanitization in the tail gas, can ensure simultaneously through the activated carbon adsorption jar that the aniline in the tail gas is adsorbed completely, reduced the corrosivity and the peculiar smell of the synthetic tail gas of N-methylaniline, provide reliable purification treatment for follow-up detection and the emission of tail gas, fail safe nature is high, the purpose of environmental protection and cleaner production has been realized, have advantages such as safety, environmental protection, easy operation convenience.
The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides a synthetic tail gas cleanup unit of N-methylaniline which characterized in that: comprises a first-stage water absorption tank (1), a second-stage water absorption tank (2) and an activated carbon adsorption tank (3), wherein the first-stage water absorption tank (1) is internally provided with a first-stage air inlet insertion pipe (1-1) inserted inside, the second-stage water absorption tank (2) is internally provided with a second-stage air inlet insertion pipe (2-1) inserted inside, the first-stage air inlet insertion pipe (1-1) is connected with an air inlet pipe (4) through an air inlet valve (1-7), the top air outlet of the first-stage water absorption tank (1) is connected with the second-stage air inlet insertion pipe (2-1) of the second-stage water absorption tank (2) through a first connecting pipe (5), the top air outlet of the second-stage water absorption tank (2) is connected with the air inlet of the activated carbon adsorption tank (3) through a second connecting pipe (6), the top air outlet of the first-stage water absorption tank (1) is provided with a first-stage filter screen (1-2), and a secondary filter screen (2-2) is arranged at an air outlet at the top of the secondary water absorption tank (2).
2. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 1, which is characterized in that: the side wall of the first-level water absorption tank (1) is further provided with a first-level liquid level meter lower interface (1-3) and a first-level liquid level meter upper interface (1-4), and the side wall of the second-level water absorption tank (2) is further provided with a second-level liquid level meter lower interface (2-3) and a second-level liquid level meter upper interface (2-4).
3. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 2, characterized in that: the lower pipe orifice of the first-stage air inlet insertion pipe (1-1) is away from the bottom of the first-stage water absorption tank (1) by a distance H150-100 mm; the distance H from the lower pipe orifice of the secondary air inlet insertion pipe (2-1) to the bottom of the secondary water absorption tank (2)2Is 50 to 100 mm.
4. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 3, characterized in that: the liquid level control of one-level water absorption jar (1) and second grade water absorption jar (2) be 300 ~ 500mm, and the upper portion cavity height of one-level water absorption jar (1) and second grade water absorption jar (2) is 300 ~ 500 mm.
5. The purification device for N-methylaniline synthesis tail gas as defined in any one of claims 1 to 4, characterized in that: the bottom of the first-stage water absorption tank (1) is also provided with a first-stage absorption tank water inlet valve (1-5) and a first-stage absorption tank water outlet valve (1-6), and the bottom of the second-stage water absorption tank (2) is also provided with a second-stage absorption tank water inlet valve (2-5) and a second-stage absorption tank water outlet valve (2-6).
6. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 5, characterized in that: activated carbon (3-1) is filled in the activated carbon adsorption tank (3), a first pipeline filter (3-2) is arranged at the air inlet of the activated carbon adsorption tank (3), and a second pipeline filter (3-3) is arranged at the air outlet of the activated carbon adsorption tank (3).
7. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 6, characterized in that: the top of the active carbon adsorption tank (3) is provided with an upper cover plate (3-4), and the bottom of the active carbon adsorption tank (3) is provided with a lower cover plate (3-5).
8. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 7, characterized in that: the air inlet of the activated carbon adsorption tank (3) is positioned at the lower part of the activated carbon adsorption tank (3), and the air outlet of the activated carbon adsorption tank (3) is positioned at the upper part of the activated carbon adsorption tank (3).
9. The purification device for the tail gas generated in the synthesis of N-methylaniline according to claim 1, which is characterized in that: the first connecting pipe (5) and the second connecting pipe (6) are corrugated hoses.
10. The device for purifying the tail gas generated in the synthesis of N-methylaniline according to claim 9, wherein: the two primary air inlet insertion pipes (1-1) are arranged in the primary water absorption tank (1), and the two primary air inlet insertion pipes (1-1) are respectively connected with corresponding air inlet pipes (4) through air inlet valves (1-7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121273379.5U CN215027500U (en) | 2021-06-08 | 2021-06-08 | N-methylaniline synthesis tail gas purification device |
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| CN202121273379.5U CN215027500U (en) | 2021-06-08 | 2021-06-08 | N-methylaniline synthesis tail gas purification device |
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