CN205700146U - Adipic acid nitrogen oxide in tail gas removing means - Google Patents
Adipic acid nitrogen oxide in tail gas removing means Download PDFInfo
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- CN205700146U CN205700146U CN201620664120.6U CN201620664120U CN205700146U CN 205700146 U CN205700146 U CN 205700146U CN 201620664120 U CN201620664120 U CN 201620664120U CN 205700146 U CN205700146 U CN 205700146U
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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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Abstract
The utility model discloses a kind of adipic acid nitrogen oxide in tail gas removing means, this device includes reactor, adipic acid tail gas outlet valve, heater and gas mixer, between adipic acid tail gas outlet valve and heater, it is provided with sample point and the front online concentration analyzer of removing before removing, between heater and gas mixer, is provided with feeding temperature meter；The import of gas mixer is replaced pipeline with gas ammonia pipeline and low-pressure nitrogen and is connected；Low-pressure nitrogen displacement pipeline is provided with low-pressure nitrogen outlet valve；Reactor inlet main valve and reactor inlet bypass valve it is provided with, online concentration analyzer, blowdown piping valve and reactor outlet main valve after sample point after being provided with removing on reactor outlet pipeline, removing between gas mixer and reactor；Reactor is provided with inlet outlet pressure differential meter and three thermometeies.This utility model can make catalyst stable operation under long term high temperature, sour environment, keeps its corresponding reactivity, makes removal of nitrogen oxide rate reach more than 95%.
Description
Technical field:
This utility model relates to a kind of exhaust gas processing device, particularly relates to the de-of a kind of adipic acid nitrogen oxide in tail gas
Except device, belong to the exhaust gas processing device technical field in adipic acid production process.
Background technology:
The tail gas of Production Processes of Adipic Acid can produce nitrogen oxides (nitric oxide, nitrogen dioxide), often produce 1 ton oneself
The big appointment of diacid produces the oxides of nitrogen gas of 0.06 ton.The annual production of current domestic adipic acid is about 2,000,000 tons, produces every year
Oxides of nitrogen gas count roughly 120,000 tons.During domestic production, the adipic acid tail gas nitrogen oxide of 90% is to pass through Dilution air
It is directly discharged in air.Nitrogen oxides is to form acid rain and the one of the main reasons of haze, causes atmospheric environment serious broken
Bad.Although the domestic research to removing nitrogen oxides is more, but there is not yet relevant adipic acid tail gas nitrogen oxide removing dress
The data of literatures put.Therefore, the most urgently seek a kind of nitrogen oxides device that can effectively remove in adipic acid tail gas, come
Meet the requirement of environmental protection.
Utility model content:
Technical problem to be solved in the utility model is: provide a kind of adipic acid nitrogen oxide in tail gas removing means,
Using this device that the removal efficiency of adipic acid nitrogen oxide in tail gas can be made to reach more than 95%, removal efficiency is higher.
The technical scheme that this utility model is taked by solving technical problem is as follows:
A kind of adipic acid nitrogen oxide in tail gas removing means, including reactor, also include being sequentially connected with along pipeline oneself
Diacid tail gas outlet valve, heater and gas mixer, the pipeline between described adipic acid tail gas outlet valve and heater sets
It is equipped with sample point and the front online concentration analyzer of removing before removing, the pipeline between described heater and gas mixer is arranged
There is feeding temperature meter；The import of described gas mixer is replaced pipeline with gas ammonia pipeline and low-pressure nitrogen and is connected, described gas ammonia
Pipeline and low-pressure nitrogen displacement pipeline are arranged in parallel, and are provided with gas ammonia outlet valve and gas flow on described gas ammonia pipeline
Meter, is provided with low-pressure nitrogen outlet valve on described low-pressure nitrogen displacement pipeline；At described gas mixer and reactor
Between pipeline on be arranged in parallel and respond device entrance main valve and reactor inlet bypass valve, at the pipe being connected with reactor outlet
Online concentration analyzer, blowdown piping valve and reactor outlet main valve after being provided with sample point after removing, removing on road；Described
Inlet outlet pressure differential meter and three thermometeies it are provided with on reactor.
Material control valve it is respectively arranged with between sample point and pipeline after sample point and removing before described removing；Described import and export
Voltage-controlled valve it is respectively arranged with between differential manometer and the import and export of reactor；Described three thermometeies are set up in parallel, and are separately positioned on
The entrance point of described reactor, centre and the port of export.
If described reactor midfeather is provided with between dried layer steel wire, two ends and steel wire and is filled with active ceramic
Ball.
Utilizing adipic acid nitrogen oxide in tail gas removing means recited above to the method removing nitrogen oxides, it is concrete
Step is as follows:
1. after heater is warming up to 200 DEG C, adipic acid tail gas nitrogen oxide is transported to gas under finite concentration mix
In clutch, wherein: the concentration of adipic acid tail gas nitrogen oxide controls between 100ppm～2000ppm；
2. catalyst reactor acts intensification of living: close reactor inlet main valve and reactor outlet main valve, elevated temperature gas
Entering in reactor by reactor inlet bypass valve, catalyzer temperature-elevating rises work, elevated temperature gas passes through blowdown piping valve
After emptying, it is recycled to adipic acid tail gas outlet valve and is circulated process；
3., when reaction bed temperature reaches more than 200 DEG C, reactor inlet main valve and reactor outlet main valve are opened,
Close blowdown piping valve；
4. open gas ammonia outlet valve, make the nitrogen oxides in adipic acid tail gas resolve into N in the reactor2And H2O, reaction
During to control the mol ratio of nitrogen oxides and ammonia be (1.1～1.2): 1, by inlet outlet pressure differential meter and reactor inlet
Logical valve ensures that the pressure differential of reactor import and export is between 0～0.01MPa；
5. the displacement of the low-pressure nitrogen under emergency episode: close adipic acid tail gas outlet valve and gas ammonia outlet valve, opens low pressure
Nitrogen outlet valve, by the ammonia in low-pressure nitrogen displacement pipeline displacement pipeline, prevents from forming ammonia salt.
The inlet gas concentration controlling nitrogen oxides by concentration analyzer online before sample point before removing and removing is maintained at
Between 100ppm～2000ppm；Reacted nitrogen oxygen is controlled by concentration analyzer online after sample point after removing and removing
Compound concentration is maintained at below 50ppm.
Compared to the prior art, of the present utility model actively have the beneficial effect that:
1, adipic acid tail gas nitrogen oxide removing means of the present utility model and method is used can to make the de-of nitrogen oxides
Except rate is more than 95%, removal efficiency is higher；This device can make catalyst stable in the environment of being in long term high temperature, acidity
Run, keep its corresponding reactivity.
2, manual sampling and the double guarantor of in-line analyzer before and after this utility model uses the reaction of adipic acid nitrogen oxide in tail gas
Danger, can truly grasp the concentration of gas, quickly and accurately adjusts ammonia input, it is to avoid adipic acid plant causes because of load adjustment
Concentration change affects the removal efficiency of nitrogen oxides；Can prevent again excessive ammonia from forming ammonium salt at pipeline and device interior simultaneously, make
Become security incident.
3, distinctive filling mode in this utility model reactor, the purpose arranging steel wire is to allow steel wire stress
Shi Gengjia is stable, and prevents catalyst from dropping to reactor bottom；Filling special active Ceramic Balls, it is ensured that enter beds
The non-N-oxide impurity gas of front fully absorption.
4, this utility model is provided with low-pressure nitrogen displacement pipeline, the low-pressure nitrogen displacement under emergency episode, can have
Effect forms ammonium salt in preventing pipeline and equipment, and safe and stable arrangement is effectively ensured.
5, during catalyzer temperature-elevating of the present utility model rises and lives, after elevated temperature gas is vented by blowdown piping valve,
It is recycled to adipic acid tail gas outlet valve and is circulated process, prevent the nitrogen oxides in adipic acid tail gas from discarding and drain in air,
Improve removal efficiency.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of adipic acid nitrogen oxide in tail gas removing means described in the utility model.
Detailed description of the invention:
Below by specific embodiment, this utility model is made further explanation, but protection of the present utility model
Scope is not limited to this.
Embodiment:
See Fig. 1, a kind of adipic acid nitrogen oxide in tail gas removing means, including reactor 10, also include depending on along pipeline
Adipic acid tail gas outlet valve 1, heater 4 and the gas mixer 6 of secondary connection, adipic acid tail gas outlet valve 1 and heater 4 it
Between pipeline on be provided with before removing online concentration analyzer 3 before sample point 2 and removing, heater 4 and gas mixer 6 it
Between pipeline on be provided with feeding temperature meter 5；The import of described gas mixer 6 and gas ammonia pipeline and low-pressure nitrogen displacement pipeline
Being connected, gas ammonia pipeline and low-pressure nitrogen displacement pipeline are arranged in parallel, and are provided with gas ammonia outlet valve 16 gentle on gas ammonia pipeline
Flowmeter body 15, is provided with low-pressure nitrogen outlet valve 17 on low-pressure nitrogen displacement pipeline；At gas mixer 6 and reactor 10
Between pipeline on be arranged in parallel and respond device entrance main valve 7 and reactor inlet bypass valve 8, be connected with reactor 10 outlet
Pipeline on be provided with removing after after sample point 11, removing online concentration analyzer 12, blowdown piping valve 13 and reactor go out
Mouth main valve 14；Reactor 10 is provided with inlet outlet pressure differential meter 9 and three thermometeies 18,19 and 20.
It is respectively arranged with material control valve between sample point 11 and pipeline after sample point 2 and removing before removing；Importing and exporting pressure
It is respectively arranged with voltage-controlled valve between difference meter 9 and the import and export of reactor 10；Three thermometeies 18,19 and 20 are set up in parallel, respectively
It is arranged on the entrance point of reactor 10, centre and the port of export.
If being arranged at intervals with between in reactor 10 between dried layer steel wire, two ends and steel wire and being filled with active ceramic
Ball.
Claims (3)
1. an adipic acid nitrogen oxide in tail gas removing means, including reactor (10), it is characterised in that: described adipic acid
Adipic acid tail gas outlet valve (1), heater (4) that nitrogen oxide in tail gas removing means also includes being sequentially connected with along pipeline are gentle
Body blender (6), the pipeline between described adipic acid tail gas outlet valve (1) and heater (4) is provided with sample point before removing
(2) online concentration analyzer (3) and before removing, the pipeline between described heater (4) and gas mixer (6) is provided with into
Material thermometer (5)；The import of described gas mixer (6) is replaced pipeline with gas ammonia pipeline and low-pressure nitrogen and is connected, described gas
Ammonia pipeline and low-pressure nitrogen displacement pipeline are arranged in parallel, and are provided with gas ammonia outlet valve (16) and gas on described gas ammonia pipeline
Effusion meter (15), is provided with low-pressure nitrogen outlet valve (17) on described low-pressure nitrogen displacement pipeline；Mix at described gas
It is arranged in parallel on pipeline between clutch (6) and reactor (10) and responds device entrance main valve (7) and reactor inlet bypass valve
(8) online concentration analyzer after sample point (11), removing after, being provided with removing on the pipeline being connected with reactor (10) outlet
(12), blowdown piping valve (13) and reactor outlet main valve (14)；Described reactor is provided with inlet outlet pressure differential meter on (10)
(9) and three thermometeies (18,19,20).
Adipic acid nitrogen oxide in tail gas removing means the most according to claim 1, it is characterised in that: before described removing
It is respectively arranged with material control valve between sample point (11) and pipeline after sample point (2) and removing；Described inlet outlet pressure differential meter (9) is with anti-
Answer and be respectively arranged with voltage-controlled valve between the import and export of device (10)；Described three thermometeies (18,19,20) are set up in parallel, and set respectively
Put the entrance point in described reactor (10), centre and the port of export.
Adipic acid nitrogen oxide in tail gas removing means the most according to claim 2, it is characterised in that: described reactor
(10) if midfeather is provided with between dried layer steel wire, two ends and steel wire is filled with active ceramic balls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664120.6U CN205700146U (en) | 2016-06-29 | 2016-06-29 | Adipic acid nitrogen oxide in tail gas removing means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620664120.6U CN205700146U (en) | 2016-06-29 | 2016-06-29 | Adipic acid nitrogen oxide in tail gas removing means |
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| Publication Number | Publication Date |
|---|---|
| CN205700146U true CN205700146U (en) | 2016-11-23 |
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| CN201620664120.6U Active CN205700146U (en) | 2016-06-29 | 2016-06-29 | Adipic acid nitrogen oxide in tail gas removing means |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921012A (en) * | 2016-06-29 | 2016-09-07 | 平顶山市普恩科技有限公司 | Device and method for removing nitric oxides in adipic acid tail gas |
| CN107905875A (en) * | 2017-12-18 | 2018-04-13 | 北京联飞翔科技股份有限公司 | A kind of purification of nitrogen oxides device and method |
-
2016
- 2016-06-29 CN CN201620664120.6U patent/CN205700146U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921012A (en) * | 2016-06-29 | 2016-09-07 | 平顶山市普恩科技有限公司 | Device and method for removing nitric oxides in adipic acid tail gas |
| CN105921012B (en) * | 2016-06-29 | 2018-08-28 | 平顶山市普恩科技有限公司 | Adipic acid nitrogen oxide in tail gas removing means and its method |
| CN107905875A (en) * | 2017-12-18 | 2018-04-13 | 北京联飞翔科技股份有限公司 | A kind of purification of nitrogen oxides device and method |
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