CN207429987U - Produce the tail gas clean-up application apparatus of methylamine and N, N-- dimethylformamide - Google Patents
Produce the tail gas clean-up application apparatus of methylamine and N, N-- dimethylformamide Download PDFInfo
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- CN207429987U CN207429987U CN201721115474.6U CN201721115474U CN207429987U CN 207429987 U CN207429987 U CN 207429987U CN 201721115474 U CN201721115474 U CN 201721115474U CN 207429987 U CN207429987 U CN 207429987U
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Abstract
The utility model is related to production methylamine and N, N dimethylformamide tail gas clean-up application apparatus; including tail gas purification tower; further include bottom of towe circulating pump, circulation heat exchanger, overhead condenser and tower tail condenser; pass through the technical program; circulation heat exchanger can remove issuable heat during tail gas absorption in time; tower reactor absorbing liquid temperature is maintained, effectively bottom of towe circulating pump is protected to run with security and stability, improves the stability and security of follow up device；Overhead condenser, the tower tail condenser of device, which can be effectively reduced in tail gas purification tower top gas phase, easily condenses ingredient；Gas-liquid separator as the last line of defense of the present apparatus, can efficiently reduce gas entrainment phenomenon, and security risk existing for solving tail gas exhausting pipeline, create more economic benefits.
Description
Technical field
The utility model is related to a kind of chemical industry equipment, more particularly to a kind of production methylamine and N, N-- dimethylformamide
The tail gas clean-up application apparatus of process units.
Background technology
In the prior art, industrial production methylamine and N, N-- dimethylformamide can generate substantial amounts of " industrial waste gas ",
Contain in " industrial waste gas " there are many poisonous and harmful substances, if without dealing carefully with, be not up to defined discharge standard and be discharged into
In environment, pollution can be generated to environment, destroy the ecological balance and natural resources.
Methylamine is important Organic Chemicals, is widely used in medicine, pesticide, rubber, dyestuff and process hides etc. industrially,
N, N-- dimethylformamides are a kind of excellent industrial solvent and organic synthesis material, are Synthetic Leather and polyacrylonitrile
Advanced solvent needed for fiber industry；Substantial amounts of exhaust gas can be generated in the production process of methylamine and N, N-- dimethylformamide, such as
Exhaust gas is routed directly to boiler combustion by fruit by pipeline, is present with easily solidifying air cooling in the process, is formed hydrops in the duct,
If things go on like this, liquid is continuously increased in pipeline, and concentration improves, and can not only generate air-resistance phenomenon, is influenced production system and is dropped a hint row
It puts, the flammable liquid for also resulting in high concentration enters boiler combustion, causes severe environmental issue, meanwhile, some in exhaust gas
Ingredient can be recycled because being sent directly into boiler combustion, the waste of the substantial amounts of energy and resource can be caused.
The tail gas absorber continued to use always in the prior art is absorbed using single column, and absorption tower tower reactor tail gas and absorbing liquid are not
It can come into full contact with, and the heat generated in absorption process cannot be removed in time, so as to cause inefficiency, can only accomplish simply to inhale
It receives, absorbing tower top does not have tail gas drying system, and after tail gas absorber, subsequent pipeline can still form hydrops phenomenon, not only return
Fruit of producing effects is poor so that mass energy is wasted, but also can cause seriously safety and environmental protection problem.
Utility model content
In view of this, the main purpose of the utility model is that providing a kind of production methylamine and N, N-- dimethylformamide
The tail gas clean-up application apparatus of process units by the technical program, increases tower reactor circulation heat exchanger, overhead condenser, tower tail
Condenser, gas-liquid separator are strengthened purifying the tail gas generated in methylamine, N, N-- production process of dimethyl formamide, be returned
It receives, reduces harm caused by hydrops in tail gas exhausting pipeline, while recycle the fractions in tail gas, create more economy
Benefit.
In order to achieve the above object, the technical solution of the utility model is realized in：A kind of production methylamine and N, N--
The tail gas clean-up application apparatus of dimethylformamide process units, including tail gas purification tower, the tail gas purification tower lower part and tail
Gas input channel is connected, and further includes bottom of towe circulating pump, circulation heat exchanger, overhead condenser, tower tail condenser and gas-liquid separator,
The tail gas purification tower gaseous phase outlet is connected by connecting pipeline with overhead condenser shell side input terminal, and overhead condenser shell side is defeated
Outlet is connected with tower tail condenser tube side input terminal, and tower tail condenser tube side output terminal is connected with gas-liquid separator input terminal, gas
The output terminal of liquid/gas separator is connected with purifier back segment process；On the circulation heat exchanger shell side output terminal and tail gas purification tower
Portion is connected, and tail gas purification tower bottom liquid phases delivery outlet is connected through bottom of towe circulating pump with circulation heat exchanger shell side input terminal.
The tail gas purification tower be vertical tubular, include cylinder, upper cover, low head, upper packing section, lower packing section and
Liquid distribution trough, the upper cover and low head are respectively fixedly disposed at cylinder both ends, are set respectively with top in the middle part of cylinder
Upper packing section and lower packing section are respectively arranged with liquid distribution trough above upper packing section and lower packing section.
Filler pressure grid and support screen are further included in the cylinder, the filler pressure grid are separately positioned on packing section under
In packing section on filler the upper surface of, the support screen is separately positioned in packing section and lower packing section below filler.
In the filler pressure grid and support screen and upper packing section and lower packing section silk screen is provided between filler.
The cylinder body bottom of the tail gas purification tower is equipped with gas distributor.
Gas-liquid separator and spark arrester are further included, the gaseous phase outlet of the gas-liquid separator upper end is connected with spark arrester, gas
The liquid-phase reflux mouth of liquid/gas separator lower end is connected with the lower part of tail gas purification tower, and input terminal is provided in the middle part of gas-liquid separator,
The input terminal of the gas-liquid separator is connected with tower tail condenser tube side output terminal.
The gas-liquid separator is vertical tubular, including Membrane Separator Cylinder for CFB Boiler and separator end socket, the separator end socket point
Membrane Separator Cylinder for CFB Boiler both ends are not fixed at, the top of Membrane Separator Cylinder for CFB Boiler are provided with wire mesh demister, under wire mesh demister
Side is provided with gas phase import, and gaseous phase outlet is equipped at the top of Membrane Separator Cylinder for CFB Boiler, and liquid-phase reflux mouth is equipped in Membrane Separator Cylinder for CFB Boiler bottom,
Further include wire mesh demister pressure grid and wire mesh demister support screen in the Membrane Separator Cylinder for CFB Boiler, wire mesh demister pressure grid and
On wire mesh demister support screen is separately positioned on above wire mesh demister and is following.
In the tube side of the circulation heat exchanger and overhead condenser respectively with cooling water supply pipe and cooling water return pipe phase
Even, it is connected respectively with the gentle recovery ammonia pipe of liquefied ammonia delivery pipe in the shell side of the tower tail condenser.
The liquid distribution trough is connected by shutoff valve with desalted water delivery pipe.
The cylinder upper, middle and lower of the tail gas purification tower is respectively arranged with epimere filler manhole, hypomere filler people
Hole and tower reactor manhole, the Membrane Separator Cylinder for CFB Boiler lower part of the gas-liquid separator are provided with manhole.
It is using the advantageous effect after above-mentioned technical proposal：A kind of production methylamine and N, N-- dimethylformamide production dress
The tail gas clean-up application apparatus put, by the technical program, circulation heat exchanger may production during removing tail gas absorption in time
Raw heat maintains tower reactor absorbing liquid temperature, effectively bottom of towe circulating pump is protected to run with security and stability, improves follow up device
Stability and security；Overhead condenser, the tower tail condenser of device can effectively reduce easily cold in tail gas purification tower top gas phase
It congeals into point；Gas-liquid separator as the last line of defense of the present apparatus, can efficiently reduce gas entrainment phenomenon.This
Security risk existing for solving tail gas exhausting pipeline after scheme implementation, creates more economic benefits.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the structure diagram of tail gas purification tower in the utility model.
Fig. 3 is the structure diagram of gas-liquid separator in utility model.
In figure, 1 tail gas purification tower, 2 tail gas input channels, 3 bottom of towe circulating pumps, 4 circulation heat exchangers, 5 overhead condensers, 6
Tower tail condenser, 7 connecting pipelines, 8 cylinders, 9 upper covers, 10 low heads, packing section, 12 times packing sections, 13 liquid distributions on 11
Device, 14 fillers pressure grid, 15 support screens, 16 silk screens, 17 gas distributors, 18 gas-liquid separators, 19 spark arresters, 20 separator cylinders
Body, 21 separator end sockets, 22 wire mesh demisters, 23 wire mesh demisters pressure grid, 24 wire mesh demisters support screen, 25 cooling waters supply
Water pipe, 26 cooling water return pipe, 27 liquefied ammonia delivery pipes, 28 gas ammonia recovery tubes, 29 shutoff valves, 30 desalted water delivery pipes, on 31
Packing section manhole, 32 times packing section manholes, 33 tower reactor manholes, 34 manholes.
Specific embodiment
It elaborates in the following with reference to the drawings and specific embodiments to the technical program.
As shown in Figure 1 to Figure 3, the utility model is related to production methylamine and N, N-- dimethylformamide process units
Tail gas clean-up application apparatus, including tail gas purification tower, 1 lower part of tail gas purification tower is connected with tail gas input pipe 2, further includes
Bottom of towe circulating pump 3, circulation heat exchanger 4, overhead condenser 5, tower tail condenser 6 and gas-liquid separator 18, the tail gas purification tower 1
Gaseous phase outlet is connected by connecting pipeline 7 with 5 shell side input terminal of overhead condenser, 5 shell side output terminal of overhead condenser and tower tail
6 tube side input terminal of condenser is connected, and 6 tube side output terminal of tower tail condenser is connected with 18 input terminal of gas-liquid separator, gas-liquid separation
The output terminal of device 18 is connected with purifier back segment process；The 4 shell side output terminal of circulation heat exchanger and 1 top of tail gas purification tower
It is connected, 1 bottom liquid phases delivery outlet of tail gas purification tower is connected through bottom of towe circulating pump 3 with 4 shell side input terminal of circulation heat exchanger.
The tail gas purification tower 1 be vertical tubular, include cylinder 8, upper cover 9, low head 10, upper packing section 11, under
Packing section 12 and liquid distribution trough 13, the upper cover 9 and low head 10 are respectively fixedly disposed at 8 both ends of cylinder, in cylinder 8
Portion and top set packing section 11 and lower packing section 12 respectively, are respectively arranged with above upper packing section 11 and lower packing section 12
Liquid distribution trough 17.
Filler pressure grid 14 and support screen 15 are further included in the cylinder 8, the filler pressure grid 14, which are separately positioned on, to be filled out
Expect in section 11 and lower packing section 12 on filler the upper surface of, the support screen 15 is separately positioned on packing section 11 and lower packing section
In 12 below filler on.
In the filler pressure grid 14 and support screen 15 and upper packing section 11 and lower packing section 12 silk is provided between filler
Net 16.
8 bottom of cylinder of the tail gas purification tower 1 is equipped with gas distributor 17.
Further include gas-liquid separator 18 and tail gas air bleeding valve 19, the gaseous phase outlet and back-fire relief of 18 upper end of gas-liquid separator
Device 19 is connected, and the liquid-phase reflux mouth of 18 lower end of gas-liquid separator is connected with the lower part of tail gas purification tower 1, in gas-liquid separator 18
Portion is provided with input terminal, and the input terminal of the gas-liquid separator 18 is connected with 6 tube side output terminal of tower tail condenser.
The gas-liquid separator 18 is vertical tubular, including Membrane Separator Cylinder for CFB Boiler 20 and separator end socket 21, the separator
End socket 21 is respectively fixedly disposed at 20 both ends of Membrane Separator Cylinder for CFB Boiler, and the top of Membrane Separator Cylinder for CFB Boiler 20 is provided with wire mesh demister 22,
Gas phase import is provided with below wire mesh demister 22, gaseous phase outlet is equipped at 20 top of Membrane Separator Cylinder for CFB Boiler, in Membrane Separator Cylinder for CFB Boiler
20 bottoms are equipped with liquid-phase reflux mouth, in the Membrane Separator Cylinder for CFB Boiler 20, further include wire mesh demister pressure grid 23 and wire mesh demister branch
Screen 24 is supportted, the wire mesh demister pressure grid 23 and wire mesh demister support screen 24 are separately positioned on the upper of wire mesh demister 22
Face and it is following on.
In the tube side of the circulation heat exchanger 4 and overhead condenser 5 respectively with cooling water supply pipe 25 and cooling water return water
Pipe 26 is connected, and is connected respectively with 27 gentle recovery ammonia pipe 28 of liquefied ammonia delivery pipe in the tube side of the tower tail condenser 6.
The liquid distribution trough 13 is connected by shutoff valve 29 with desalted water delivery pipe 30.
8 upper, middle and lower of cylinder of the tail gas purification tower 1 is respectively arranged with epimere filler manhole 31, hypomere is filled out
Material manhole 32 and tower reactor manhole 33,20 lower part of Membrane Separator Cylinder for CFB Boiler of the gas-liquid separator 18 are provided with manhole 34.
The technical solution of the utility model in practical applications, with 260,000 tons/year of synthetic methylamine devices and 230,000 tons/year of N,
Exemplified by N-- dimethylformamide process units, tail gas yield is 470m3/ h, into the gas before exhaust gas cleaner into
It is divided into CO：28.5%、H2：34.1%、O2：2.4%、CH4：7.7%、N2：16.1%、CH3OH：11.2%, pressure 0.02MPaG, methylamine
And the production of N, N-- dimethylformamide generates tail gas and is entered by tail gas input channel 2 in the tower reactor of tail gas purification tower 1, through gas
After body distributor 17 is absorbed by tower reactor absorbing liquid, not by absorption portion gas rise through upper packing section 11 and lower packing section 12 with
Dropping liq mass-and heat-transfer, gas phase, which still rises, sequentially enters overhead condenser 5, tower tail condenser 6, gas-liquid separator 18, cold
Lime set is back to tail gas purification tower 1, and dry fixed gas enters follow-up exhausting pipeline through spark arrester 19, finally by boiler combustion；Tail
It after gas purifying column 1 comes into operation, is verified by the regular hour, does not find apparent liquid in the surge tank of back segment exhausting pipeline, demonstrate,proved
The bright exhaust gas cleaner assimilation effect is apparent.Tower reactor absorbing liquid is delivered to 4 shell side of circulation heat exchanger through bottom of towe circulating pump 3,
Into 1 middle and upper part liquid distribution trough 13 of tail gas purification tower after cooling, in tail gas after liquid distribution trough 13 is uniformly distributed
Dropping liq is formed in 1 cylinder 8 of purifying column, is not come into full contact in filler with tower reactor by absorption uprising gas, mass-and heat-transfer.When
Tower reactor liquid absorption element is enough, can be absorbed into point：Methanol reaches 30%, through bottom of towe circulating pump 3 outlet be delivered to other workshop sections into
Row recycling, by further calculating, tail gas purification tower 1 is to methanol in methylamine, N, N-- dimethylformamide product gas
Absorptivity is 88.2%.
In the utility model, by the embodiment of the technical program, methylamine, the production of N, N-- dimethylformamide are generated
Tail gas play the role of effectively purification and recycling, not only reduce security risk caused by hydrops in exhaust pipe, prevention
Pipeline hydrops to the issuable environmental issue of boiler combustion, meanwhile, the purifier absorbs exhaust gas component
It works well, more benefits can be created, application prospect is very extensive.
The foregoing is merely the preferable possible embodiments of the utility model, and non-limiting the scope of the utility model.
Claims (10)
1. a kind of tail gas clean-up application apparatus for producing methylamine and N, N-- dimethylformamide, including tail gas purification tower, the tail
Gas purifying column lower part is connected with tail gas input channel, which is characterized in that it is cold to further include bottom of towe circulating pump, circulation heat exchanger, tower top
Condenser and tower tail condenser, the tail gas purification tower gaseous phase outlet pass through connecting pipeline and overhead condenser shell side input terminal phase
Even, overhead condenser shell side output terminal is connected with tower tail condenser shell side input terminal, tower tail condenser shell side output terminal and tail gas
Purifying column lower part is connected；The circulation heat exchanger shell side output terminal is connected with tail gas purification tower top, tail gas purification tower bottom liquid
Phase delivery outlet is connected through bottom of towe circulating pump with circulation heat exchanger shell side input terminal.
2. the tail gas clean-up application apparatus of production methylamine according to claim 1 and N, N-- dimethylformamide, feature
It is, the tail gas purification tower is vertical tubular, includes cylinder, upper cover, low head, upper packing section, lower packing section and liquid
Body distributor, the upper cover and low head are respectively fixedly disposed at cylinder both ends, are set respectively with top in the middle part of cylinder
Packing section and lower packing section are respectively arranged with liquid distribution trough above upper packing section and lower packing section.
3. the tail gas clean-up application apparatus of production methylamine according to claim 2 and N, N-- dimethylformamide, feature
It is, filler pressure grid and support screen are further included in the cylinder, and the filler pressure grid are separately positioned on packing section and are filled out under
Expect in section on filler the upper surface of, the support screen is separately positioned in packing section and lower packing section below filler.
4. the tail gas clean-up application apparatus of production methylamine according to claim 3 and N, N-- dimethylformamide, feature
It is, silk screen is provided between filler in the filler pressure grid and support screen and upper packing section and lower packing section.
5. the tail gas clean-up application apparatus of production methylamine according to claim 2 and N, N-- dimethylformamide, feature
It is, the cylinder body bottom of the tail gas purification tower is equipped with gas distributor.
6. the tail gas clean-up application apparatus of production methylamine according to claim 1 and N, N-- dimethylformamide, feature
It is, further include gas-liquid separator and tail gas air bleeding valve, the exhaust outlet of the gas-liquid separator upper end is connected with tail gas air bleeding valve,
The gas outlet of gas-liquid separator lower end is connected with the lower part of tail gas purification tower, and gas-liquid separator top is provided with input terminal, institute
The input terminal for stating gas-liquid separator is connected with tower tail condenser shell side output terminal, and the Membrane Separator Cylinder for CFB Boiler lower part of gas-liquid separator is set
There is manhole.
7. the tail gas clean-up application apparatus of production methylamine according to claim 6 and N, N-- dimethylformamide, feature
It is, the gas-liquid separator is vertical tubular, and including Membrane Separator Cylinder for CFB Boiler and separator end socket, the separator end socket is solid respectively
Surely Membrane Separator Cylinder for CFB Boiler both ends are arranged on, the top of Membrane Separator Cylinder for CFB Boiler is provided with wire mesh demister, is set below wire mesh demister
Gas phase import is equipped with, gaseous phase outlet is equipped at the top of Membrane Separator Cylinder for CFB Boiler, liquid-phase reflux mouth is equipped in Membrane Separator Cylinder for CFB Boiler bottom, it is described
Wire mesh demister pressure grid and wire mesh demister support screen, the wire mesh demister pressure grid and silk screen are further included in Membrane Separator Cylinder for CFB Boiler
On demister support screen is separately positioned on above wire mesh demister and is following.
8. the tail gas clean-up application apparatus of production methylamine according to claim 1 and N, N-- dimethylformamide, feature
It is, is connected respectively with cooling water supply pipe and cooling water return pipe in the tube side of the circulation heat exchanger and overhead condenser,
It is connected respectively with liquefied ammonia delivery pipe and liquefied ammonia recovery tube in the tube side of the tower tail condenser.
9. the tail gas clean-up application apparatus of production methylamine according to claim 2 and N, N-- dimethylformamide, feature
It is, the liquid distribution trough is connected by shutoff valve with desalted water delivery pipe.
10. the tail gas clean-up application apparatus of production methylamine according to claim 2 and N, N-- dimethylformamide, special
Sign is that the cylinder upper, middle and lower of the tail gas purification tower is respectively arranged with epimere filler manhole, hypomere filler manhole
With tower reactor manhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721115474.6U CN207429987U (en) | 2017-09-01 | 2017-09-01 | Produce the tail gas clean-up application apparatus of methylamine and N, N-- dimethylformamide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721115474.6U CN207429987U (en) | 2017-09-01 | 2017-09-01 | Produce the tail gas clean-up application apparatus of methylamine and N, N-- dimethylformamide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662203A (en) * | 2020-05-25 | 2020-09-15 | 安徽金禾实业股份有限公司 | Method and device for recycling heat energy of DMF (dimethyl formamide) rectification recovery device |
| CN112452116A (en) * | 2020-11-24 | 2021-03-09 | 天津大学 | Device and method for recycling and treating waste gas containing N, N-dimethylacetamide |
| CN113041719A (en) * | 2021-03-22 | 2021-06-29 | 蓝帆医疗股份有限公司 | Organic solvent absorption method and device for tail gas of PVC glove production process |
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2017
- 2017-09-01 CN CN201721115474.6U patent/CN207429987U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662203A (en) * | 2020-05-25 | 2020-09-15 | 安徽金禾实业股份有限公司 | Method and device for recycling heat energy of DMF (dimethyl formamide) rectification recovery device |
| CN111662203B (en) * | 2020-05-25 | 2023-03-03 | 安徽金禾实业股份有限公司 | Method and device for recycling heat energy of DMF (dimethyl formamide) rectification recycling device |
| CN112452116A (en) * | 2020-11-24 | 2021-03-09 | 天津大学 | Device and method for recycling and treating waste gas containing N, N-dimethylacetamide |
| CN113041719A (en) * | 2021-03-22 | 2021-06-29 | 蓝帆医疗股份有限公司 | Organic solvent absorption method and device for tail gas of PVC glove production process |
| CN113041719B (en) * | 2021-03-22 | 2023-02-17 | 蓝帆医疗股份有限公司 | Organic solvent absorption method and device for tail gas of PVC glove production process |
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