CN212548908U - Tail gas absorption device for methylamine production process - Google Patents
Tail gas absorption device for methylamine production process Download PDFInfo
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- CN212548908U CN212548908U CN202020742881.5U CN202020742881U CN212548908U CN 212548908 U CN212548908 U CN 212548908U CN 202020742881 U CN202020742881 U CN 202020742881U CN 212548908 U CN212548908 U CN 212548908U
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Abstract
The utility model provides a tail gas absorbing device for methylamine production process. Include the tail gas buffer tank of being connected with methylamine production system tail gas pipeline, tail gas buffer tank upper portion is provided with the gas vent, the bottom sets up the leakage fluid dram, the gas vent of tail gas buffer tank passes through absorption tank intake-tube connection absorption tank, the leakage fluid dram of tail gas buffer tank passes through tail gas buffer tank fluid-discharge tube and connects the absorption tank, absorption tank connects circulation absorption liquid spray system, the lower part of absorption tower is connected through the absorption tank blast pipe to the gas phase export of absorption tank, the liquid phase export of absorption tank passes through the material transferring pump and connects the methyl alcohol proportioning bins, the gas phase export on the upper portion of absorption tower passes through tail gas cooling pipe intake-tube connection tail gas cooler, the gas phase exit linkage of tail gas cooler burns burning furnace, the liquid phase export of the bottom of absorption tower and the liquid phase export of tail gas cooler bottom. The utility model can recycle the amine tail gas generated in the methylamine production process and reduce the raw material consumption.
Description
Technical Field
The utility model relates to a tail gas absorbing device for in methylamine production technology belongs to chemical industry equipment technical field.
Background
At present, the industrial methylamine production tail gas treatment process is absorbed by a buffer tank, an absorption tank and an absorption tower system, the absorption effect is not ideal, a large amount of amine gas still exists in tail gas discharged after absorption, and the tail gas enters an incinerator for incineration, so that the consumption of methylamine production raw materials is increased, and the operation load of the incinerator is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the problem that above-mentioned exists and provide a tail gas absorbing device for in methylamine production technology, when reducing raw materials consumption, improved the production environment, produced great economic benefits and social.
The above purpose is realized by the following technical scheme:
a tail gas absorption device used in a methylamine production process comprises a tail gas buffer tank connected with a tail gas pipeline of a methylamine production system, the upper part of the tail gas buffer tank is provided with an exhaust port, the bottom of the tail gas buffer tank is provided with a liquid outlet, the exhaust port of the tail gas buffer tank is connected with an absorption groove through an absorption groove air inlet pipe, the liquid outlet of the tail gas buffer tank is connected with the absorption tank through a tail gas buffer tank liquid outlet pipe, the absorption tank is connected with a circulating absorption liquid spraying system, the gas phase outlet of the absorption tank is connected with the lower part of the absorption tower through an absorption tank exhaust pipe, the liquid phase outlet of the absorption tank is connected with a methanol batching tank through a material transferring pump, the gas phase outlet at the upper part of the absorption tower is connected with a tail gas cooler through a tail gas cooling pipeline gas inlet pipe, and a gas phase outlet of the tail gas cooler is connected with the incinerator, and a liquid phase outlet at the bottom of the absorption tower and a liquid phase outlet at the bottom of the tail gas cooler are both connected with the absorption tank.
The tail gas absorption device for the methylamine production process is characterized in that a tail gas spray pipe is arranged on the lower portion of the absorption groove and is connected with the absorption groove gas inlet pipe.
The tail gas absorption device for the methylamine production process is characterized in that the circulating absorption liquid spraying system comprises a circulating cooler, a circulating cooling liquid output pipe of the circulating cooler is connected with an absorption liquid spraying pipe arranged on the upper part of the absorption tank, the bottom of the absorption tank is connected with a circulating cooling liquid recovery pipe, and the circulating cooling liquid recovery pipe is connected with the circulating cooler through a circulating pump.
The tail gas absorption device for the methylamine production process comprises an absorption tower A and an absorption tower B which are connected in series, wherein the absorption tower A and the absorption tower B are both connected into a methanol pipe.
The tail gas absorption device for the methylamine production process comprises a material transferring pump A and a material transferring pump B which are connected in parallel.
Has the advantages that:
1. the utility model discloses can make produced amine tail gas recovery recycle in the methylamine production technology, when reducing raw materials consumption, improve the production environment, produce great economic benefits and social.
2. The utility model discloses structural design is ingenious, can use with the cooperation of methylamine production system, reduces the raw materials consumption, reduces environmental pollution, alleviates and burns burning furnace operation load, can realize the comprehensive utilization of resource.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a tail gas buffer tank; 2. an absorption tank air inlet pipe; 3. an absorption tank; 4. a tail gas spray pipe; 5. a circulation pump; 6. a circulation cooler; 7. a circulating cooling output liquid pipe; 8. an absorption liquid spray pipe; 9. an absorption tank exhaust pipe; 10. an absorption tower A; 11. a methanol inlet pipe; 12. an absorption tower A/B communicating pipe; 13. an absorption tower B; 14. an exhaust gas cooler air inlet pipe; 15. a tail gas cooler; 16. a tail gas cooler exhaust pipe; 17. an absorption tower A/B and a tail gas cooler liquid discharge pipe; 18. a material transferring pump A; 19. a material transferring pump B; 20. tail gas pipeline of methylamine producing system; 21. and a tail gas buffer tank liquid discharge pipe.
Detailed Description
As shown in fig. 1: the tail gas absorption device for the methylamine production process comprises a tail gas buffer tank 1 connected with a tail gas pipeline 20 of a methylamine production system, wherein an exhaust port is arranged on the upper portion of the tail gas buffer tank 1, a liquid discharge port is arranged at the bottom of the tail gas buffer tank, the exhaust port of the tail gas buffer tank 1 is connected with an absorption tank 3 through an absorption tank air inlet pipe 2, the liquid discharge port of the tail gas buffer tank 1 is connected with the absorption tank 3 through a tail gas buffer tank liquid discharge pipe 21, the absorption tank 3 is connected with a circulating absorption liquid spraying system, the gas phase outlet of the absorption tank is connected with the lower portion of an absorption tower through an absorption tank exhaust pipe 9, the liquid phase outlet of the absorption tank is connected with a methanol dosing tank through a material transferring pump, the gas phase outlet on the upper portion of the absorption tower is connected with a tail gas cooler 15 through a tail gas cooling pipeline air inlet pipe, the gas phase outlet of the tail gas cooler 15 is connected with an incinerator, and the liquid phase outlet A groove.
In the tail gas absorption device for the methylamine production process in the embodiment, the lower part of the absorption tank is provided with a tail gas spray pipe 4, and the tail gas spray pipe is connected with the absorption tank gas inlet pipe 2.
In this embodiment, the tail gas absorption device for methylamine production process, the circulating absorption liquid spraying system comprises a circulating cooler 6, a circulating cooling liquid output pipe 7 of the circulating cooler 6 is connected with an absorption liquid spraying pipe 8 arranged on the upper part of the absorption tank, the bottom of the absorption tank 3 is connected with a circulating cooling liquid recovery pipe, and the circulating cooling liquid recovery pipe is connected with the circulating cooler through a circulating pump 5.
In the tail gas absorption device for the methylamine production process, the absorption tower comprises an absorption tower A10 and an absorption tower B13 which are connected in series, the absorption tower A10 and the absorption tower B13 are both connected into the methanol pipe 11, and the two absorption towers are connected in series, so that the absorption is more thorough.
In the tail gas absorption device for the methylamine production process, the material transferring pump comprises a material transferring pump A18 and a material transferring pump B19 which are connected in parallel, and the two material transferring pumps are connected in parallel, so that the tail gas absorption device is convenient to maintain, replace and use.
The working process is as follows:
adopt above-mentioned scheme, the utility model discloses a working process is: methylamine production system tail gas (contain ammonia, methylamine, methyl alcohol) gets into the tail gas buffer tank, isolate a small amount of liquid phase methyl alcohol and other impurity, through tail gas buffer tank bottom fluid-discharge tube 21, in the absorption tank of discharging, all the other tail gas are connected through absorption tank intake pipe 2 and are got into the inside downside jet-propelled pipe of absorption tank, absorption liquid methyl alcohol passes through circulating pump and circulative cooler pipeline 7 and connects the inside upside shower of getting into the absorption tank in the absorption tank, spray ammonia and methylamine in the methyl alcohol absorption tail gas, the absorption rate can reach 90%. The incompletely absorbed tail gas enters the bottom of an absorption tower A through an exhaust pipe 9 of an absorption tank, and methanol enters the top of the absorption tower A and is reversely absorbed in a filler in the absorption tower A; the incompletely absorbed tail gas enters the bottom of the absorption tower B through the communicating pipe 12, methanol enters the top of the absorption tower B, and is reversely absorbed in the filler in the absorption tower B, and the absorption rate can reach 95%. The incompletely absorbed tail gas enters the bottom of the tail gas cooler through a tail gas cooler air inlet pipe 14, ammonia and methylamine in the tail gas are cooled and recovered through a tail gas cooler refrigerant, the recovery rate can reach 98%, and absorption liquid enters the absorption tank through a liquid discharge pipe 17. Finally, the non-recyclable tail gas enters the incinerator for incineration treatment through a tail gas cooler top exhaust pipe. After methanol in the absorption tank absorbs ammonia and methylamine in tail gas, the tail gas is sent to a methanol batching tank of a methylamine production system through pipeline connection of a material transfer pump A/B for recycling.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.
Claims (5)
1. A tail gas absorbing device for methylamine production technology is characterized in that: comprises a tail gas buffer tank connected with a tail gas pipeline of a methylamine production system, wherein the upper part of the tail gas buffer tank is provided with an exhaust port, the bottom of the tail gas buffer tank is provided with a liquid outlet, the exhaust port of the tail gas buffer tank is connected with the absorption tank through an absorption tank air inlet pipe, the liquid outlet of the tail gas buffer tank is connected with the absorption tank through a tail gas buffer tank liquid outlet pipe, the absorption tank is connected with a circulating absorption liquid spraying system, a gas phase outlet of the absorption tank is connected with the lower part of the absorption tower through an absorption tank exhaust pipe, the liquid phase outlet of the absorption tank is connected with a methanol batching tank through a material transferring pump, the gas phase outlet at the upper part of the absorption tower is connected with a tail gas cooler through a tail gas cooling pipeline gas inlet pipe, and a gas phase outlet of the tail gas cooler is connected with the incinerator, and a liquid phase outlet at the bottom of the absorption tower and a liquid phase outlet at the bottom of the tail gas cooler are both connected with the absorption tank.
2. The tail gas absorption device for methylamine production process according to claim 1, wherein: and a tail gas spraying pipe is arranged at the lower part of the absorption groove and is connected with the gas inlet pipe of the absorption groove.
3. The tail gas absorption device for methylamine production process according to claim 1, wherein: the circulating absorption liquid spraying system comprises a circulating cooler, a circulating cooling liquid output pipe of the circulating cooler is connected with an absorption liquid spraying pipe arranged on the upper part of the absorption tank, the bottom of the absorption tank is connected with a circulating cooling liquid recovery pipe, and the circulating cooling liquid recovery pipe is connected with the circulating cooler through a circulating pump.
4. The tail gas absorption device for methylamine production process according to claim 1, wherein: the absorption tower comprises an absorption tower A and an absorption tower B which are connected in series, and the absorption tower A and the absorption tower B are both connected into a methanol pipe.
5. The tail gas absorption device for methylamine production process according to claim 1, wherein: the material transferring pump comprises a material transferring pump A and a material transferring pump B which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020742881.5U CN212548908U (en) | 2020-05-08 | 2020-05-08 | Tail gas absorption device for methylamine production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020742881.5U CN212548908U (en) | 2020-05-08 | 2020-05-08 | Tail gas absorption device for methylamine production process |
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| CN212548908U true CN212548908U (en) | 2021-02-19 |
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| CN202020742881.5U Active CN212548908U (en) | 2020-05-08 | 2020-05-08 | Tail gas absorption device for methylamine production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853570A (en) * | 2022-05-13 | 2022-08-05 | 山东阿斯德科技有限公司 | Method for treating wastewater in formamide production device |
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2020
- 2020-05-08 CN CN202020742881.5U patent/CN212548908U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114853570A (en) * | 2022-05-13 | 2022-08-05 | 山东阿斯德科技有限公司 | Method for treating wastewater in formamide production device |
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