CN206587600U - A kind of removing means of adipic acid nitrogen oxide in tail gas - Google Patents
A kind of removing means of adipic acid nitrogen oxide in tail gas Download PDFInfo
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- CN206587600U CN206587600U CN201720338273.6U CN201720338273U CN206587600U CN 206587600 U CN206587600 U CN 206587600U CN 201720338273 U CN201720338273 U CN 201720338273U CN 206587600 U CN206587600 U CN 206587600U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/30—Improvements relating to adipic acid or caprolactam production
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a kind of removing means of adipic acid nitrogen oxide in tail gas, including dilution unit, the first reaction member and the second reaction member, dilution unit includes gas-liquid separator, compressed air cut-back tank and the first concentration in-line analyzer being sequentially connected with by the road；First reaction member includes feed preheater, heater, the first reaction unit and the gas gas-heat exchanger being sequentially connected with by the road；Second reaction member includes hybrid system, the second concentration in-line analyzer, the second reaction unit, the 3rd concentration in-line analyzer and the heat reclaim unit being sequentially connected with by the road.Multiple plug-in type thermometers are provided with the top of the first reaction unit and the second reaction unit, every thermometer is divided into multiple temperature measuring points from top to bottom in beds.The utility model can make catalyst stable operation under long term high temperature, sour environment, keep its reactivity, nitrous oxide removal efficiency is reached more than 98%, nitrogen dioxide and nitric oxide removal efficiency reach more than 95%.
Description
Technical field：
The utility model is related to a kind of processing unit of tail gas, more particularly to a kind of adipic acid nitrogen oxide in tail gas
Removing means, belongs to adipic acid production technical field.
Background technology：
In adipic acid production process, generally using the production technology of Nitric acid catalyzing and oxidizing cyclohexanol, in this production process
Inevitably result from substantial amounts of nitrous gas.The tail gas composition that adipic acid is produced mainly includes：Nitrous oxide 38%V/V, nitrogen
Gas 54%V/V, while also having the oxygen of residual, oxycarbide, vapor, NOXDeng mixing sour gas.Often produce 1t adipic acids
About produce 0.27t nitrous oxides, 700ppm nitrogen dioxide and 1000ppm nitric oxides.Ended for the end of the year 2015, domestic adipic acid
About 2,500,000 tons of production capacity, it is annual to produce about 80.93 tons of about 67.5 ten thousand tons of nitrous oxide, nitrous oxide and nitric oxide.
Nitrous gas in adipic acid tail gas, although the recycling of process after adipic acid plant nitric acid absorber etc.,
But expendable nitrous oxide gas are directly discharged in air after substantially passing through Dilution air, to atmospheric environment
Do great damage.
In Chinese the year two thousand twenty carbon emission reduction target, per GDP CO2 emissions declined 40%~45% than 2005, this
It is a very difficult task.Not only require industry, building and traffic body that we need Accelerating The Construction to be characterized with low-carbon
System, and more urgently seek to realize the technical research of zero-emission to existing apparatus " three wastes ".
Utility model content：
Technical problem to be solved in the utility model is：A kind of removing dress of adipic acid nitrogen oxide in tail gas is provided
Put, using the device catalyst can be made in the stable operation under long term high temperature, acid environment, nitrous oxide can be made
Removal efficiency reaches more than 98%, and nitrogen dioxide and nitric oxide production removal efficiency reach more than 95%.
The utility model is that the technical solution adopted for solving the technical problem is as follows：
A kind of removing means of adipic acid nitrogen oxide in tail gas, successively including be sequentially connected with by the road dilution unit,
First reaction member and the second reaction member, the dilution unit include gas-liquid separator, the compression sky being sequentially connected with by the road
Gas cut-back tank and the first concentration in-line analyzer；First reaction member includes the feeding preheating being sequentially connected with by the road
Device, heater, the first reaction unit and gas gas-heat exchanger；Second reaction member is mixed including what is be sequentially connected with by the road
Syzygy system, the second concentration in-line analyzer, the second reaction unit, the 3rd concentration in-line analyzer and heat reclaim unit.
Multiple plug-in type thermometers, every thermometer are provided with the top of first reaction unit and the second reaction unit
Be divided into multiple temperature measuring points from top to bottom in beds, monitor the temperature difference of same level beds 0~120 DEG C it
Between, prevent that same level catalyst temperature bias current is excessive, influence catalyst life.
The high-temperature gas of the first reaction unit outlet is preheated to the cold air of the first reaction unit import, is made
The gas inlet temperature of first reaction unit is closer to reaction condition, while making the gas temperature of outlet reach that the second reaction is filled
The reaction condition put, and the heat of the high-temperature gas of the second reaction unit outlet is reclaimed, with the shape of steam or hot water
Formula carries out the recycling of heat.
The removal methods of nitrogen oxides are removed using the removing means of adipic acid nitrogen oxide in tail gas recited above,
It is comprised the following steps that：
1. process is diluted：Adipic acid tail gas is delivered in described gas-liquid separator, after removing moisture, tail gas enters described
Compressed air cut-back tank in mixed with compressed air；In mixed gas after dilution, the volumetric concentration of nitrous oxide is led to
Cross the first concentration in-line analyzer and detect its content, the volumetric concentration of nitrous oxide is maintained at 8~15%；
2. the first reaction process：Mixed gas after dilution is changed by described feed preheater feeding preheating and adverse current
Heat, makes temperature be promoted to 130 DEG C~170 DEG C, and then mixed gas is imported into described heater, makes gaseous mixture body temperature
Degree is increased to 380~550 DEG C, sends into mixed gas in the first described reaction unit after temperature is constant, and control first is reacted
The import and export pressure differential of device closes described heater after 0.05~0.08MPa, normal reaction, keeps first to react
The temperature of device exit gas is exchanged heat at 600 DEG C~800 DEG C with the portion gas in feed preheater by described gas gas
Device realizes the feeding temperature requirement of the first reaction unit；
3. the second reaction process：The mixed gas emitted from described gas gas-heat exchanger, is existed by the second concentration
Line analysis instrument detects the content of nitric oxide and nitrogen dioxide, the content concn for making nitric oxide and nitrogen dioxide is maintained at 0~
500ppm, the qualified mixed gas of on-line monitoring concentration is imported in described hybrid system, is passed through into hybrid system a certain amount of
Ammonia, control the temperature of hybrid system at 200 DEG C~460 DEG C, it is well mixed after mixed gas is imported into described second
In reaction unit, ammonia residual is controlled by the 3rd concentration in-line analyzer；After completion of the reaction, the gas after being processed enters institute
In the heat reclaim unit stated, after heat recovery, the gas that is processed is through in described feed preheater, exchanging heat to 80 DEG C~110
After DEG C by smoke stack emission into air.
The removal methods have all carried out abundant recovery, the first reaction unit outlet to the various waste heats in removing means
High-temperature gas the cold air of the first reaction unit import is preheated, make the gas inlet temperature of the first reaction unit more
Close to reaction condition, while making the gas temperature of outlet reach the reaction condition of the second reaction unit, and the second reaction is filled
The heat for putting the high-temperature gas of outlet is reclaimed, and the recycling of heat is carried out in the form of steam or hot water.
Using the removing means of adipic acid nitrogen oxide in tail gas of the present utility model, catalyst can be made in long-term
Stable operation under high temperature, acid environment, can make the removal efficiency of nitrous oxide reach more than 98%, nitrogen dioxide and an oxygen
The removal efficiency for changing nitrogen reaches more than 95%.
The beneficial effects of the utility model are as follows：
1）In the case where device produce load is fluctuated, adipic acid tail gas amount can produce change, can online be divided by concentration
Analyzer device ensures the volumetric concentration of nitrous oxide in the mixed gas after being diluted 8~15%（V/V）, it is to avoid because of an oxidation
Phenodiazine excessive concentration causes overheating problem.
2）Be provided with branched plug-in type thermometer at the top of reaction unit, every thermometer in beds from top to bottom
It is divided into Togo's temperature measuring point, the monitoring same level beds temperature difference prevents same level surface catalysis between 0~120 DEG C
Agent temperature bias current is excessive, influences the service life of catalyst.
3）Steam is produced by heat recovery, while being exchanged heat through feeding preheating system and feed gas, returning for energy is realized
Receive and recycle.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model.
Embodiment：
The utility model is made further explanation below by drawings and Examples, but guarantor of the present utility model
Protect scope not limited to this.
Embodiment：Referring to Fig. 1, a kind of removing means of adipic acid nitrogen oxide in tail gas, including it is sequentially connected with by the road
Dilution unit, the first reaction member and the second reaction member, the dilution unit includes the gas-liquid that is sequentially connected with by the road point
From device 1, the concentration in-line analyzer 3 of compressed air cut-back tank 2 and first；First reaction member includes sequentially connecting by the road
Feed preheater 4, heater 5, the first reaction unit 6 and the gas gas-heat exchanger 7 connect；Second reaction member includes warp
The second concentration in-line analyzer 8 that pipeline is sequentially connected with, hybrid system 9, the second reaction unit 10, the 3rd concentration in-line analyzer
11 and heat reclaim unit 12.
Multiple plug-in type thermometers are provided with the first reaction unit 6 and the top of the second reaction unit 10（Do not drawn in figure
Go out）, every thermometer is divided into multiple temperature measuring points in beds, monitors the temperature of same level beds from top to bottom
Difference prevents that same level catalyst temperature bias current is excessive between 0~120 DEG C, influences catalyst life.
The high-temperature gas of first reaction unit 6 outlet is preheated to the cold air of the import of the first reaction unit 6, makes the
The gas inlet temperature of one reaction unit 6 is closer to reaction condition, while making the gas temperature of outlet reach that the second reaction is filled
10 reaction condition is put, and the heat of the high-temperature gas of the second reaction unit 10 outlet is reclaimed, with steam or hot water
Form carry out heat recycling.
Using the removing means of adipic acid nitrogen oxide in tail gas of the present utility model, catalyst can be made in long-term
Stable operation under high temperature, acid environment, can make the removal efficiency of nitrous oxide reach more than 98%, nitrogen dioxide and an oxygen
The removal efficiency for changing nitrogen reaches more than 95%.
Claims (3)
1. a kind of removing means of adipic acid nitrogen oxide in tail gas, it is characterised in that：The removing means includes through pipe successively
Dilution unit, the first reaction member and the second reaction member that road is sequentially connected with, the dilution unit include sequentially connecting by the road
The gas-liquid separator connect（1）, compressed air cut-back tank（2）With the first concentration in-line analyzer（3）；First reaction member
Including the feed preheater being sequentially connected with by the road（4）, heater（5）, the first reaction unit（6）And gas gas-heat exchanger
（7）；Second reaction member includes the second concentration in-line analyzer being sequentially connected with by the road（8）, hybrid system（9）,
Two reaction units（10）, the 3rd concentration in-line analyzer（11）And heat reclaim unit（12）.
2. a kind of removing means of adipic acid nitrogen oxide in tail gas according to claim 1, it is characterised in that：Described
One reaction unit（6）With the second reaction unit（10）Top is provided with multiple plug-in type thermometers, and every thermometer is in catalysis
Agent bed is divided into multiple temperature measuring points from top to bottom, monitors the temperature difference of same level beds between 0~120 DEG C, prevents
Only the bias current of same level catalyst temperature is excessive, influences catalyst life.
3. a kind of removing means of adipic acid nitrogen oxide in tail gas according to claim 1, it is characterised in that：It is described
First reaction unit（6）The high-temperature gas of outlet is to the first reaction unit（6）The cold air of import is preheated, and is made first anti-
Answer device（6）Gas inlet temperature closer to reaction condition, while making the gas temperature of outlet reach the second reaction unit
（10）Reaction condition, and to the second reaction unit（10）The heat of the high-temperature gas of outlet is reclaimed, with steam or heat
The form of water carries out the recycling of heat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720338273.6U CN206587600U (en) | 2017-04-01 | 2017-04-01 | A kind of removing means of adipic acid nitrogen oxide in tail gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720338273.6U CN206587600U (en) | 2017-04-01 | 2017-04-01 | A kind of removing means of adipic acid nitrogen oxide in tail gas |
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| CN206587600U true CN206587600U (en) | 2017-10-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823793A (en) * | 2017-04-01 | 2017-06-13 | 平顶山市普恩科技有限公司 | A kind of removing means and removal methods of adipic acid nitrogen oxide in tail gas |
| CN113477049A (en) * | 2021-07-05 | 2021-10-08 | 北京华普蓝天环境科技有限公司 | Low-temperature N2O-grade mixed decomposition and purification system and method |
-
2017
- 2017-04-01 CN CN201720338273.6U patent/CN206587600U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823793A (en) * | 2017-04-01 | 2017-06-13 | 平顶山市普恩科技有限公司 | A kind of removing means and removal methods of adipic acid nitrogen oxide in tail gas |
| CN113477049A (en) * | 2021-07-05 | 2021-10-08 | 北京华普蓝天环境科技有限公司 | Low-temperature N2O-grade mixed decomposition and purification system and method |
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