CN204806415U - Tail gas catalysis of acrylonitrile factory is burned and denitrification facility - Google Patents
Tail gas catalysis of acrylonitrile factory is burned and denitrification facility Download PDFInfo
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- CN204806415U CN204806415U CN201520378913.7U CN201520378913U CN204806415U CN 204806415 U CN204806415 U CN 204806415U CN 201520378913 U CN201520378913 U CN 201520378913U CN 204806415 U CN204806415 U CN 204806415U
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Abstract
The utility model provides a tail gas catalysis of acrylonitrile factory is burned and denitrification facility, burning unit, ammonia including flue gas catalysis and diluting unit, waste heat recovery unit, spout ammonia unit, steam pocket, denitration reactor and chimney, flue gas catalysis is burned the unit and is connected the waste heat recovery unit respectively and spout the ammonia unit, and ammonia dilutes the unit connection and spouts the ammonia unit, and waste heat recovery unit connection steam pocket spouts ammonia unit connection denitration reactor, the gaseous chimney that gets into after the denitration, the utility model relates to a rationally, convenient to use, area is little, and is with low costs, and the waste heat recovery high -usage discharges after carrying out the heat transfer with the clean flue gas after the denitration and original flue gas, can preheat original flue gas, and the messenger system reaches thermal balance, and the waste heat of the high temperature flue gas that burns catalysis is retrieved, and the energy saving has fine application prospect.
Description
Technical field
The utility model relates to industrial waste gas processing technology field, is specifically related to the tail gas catalyzed burning of a kind of acrylonitrile plant and denitrification apparatus.
Background technology
In recent years, the atmosphere polluting problem such as haze has become focus and the focus of government and public attention.2010, " instruction about advancing the work of atmosphere pollution groupcontrol to improve region air quality " that the General Office of the State Council prints and distributes (promulgated by the State Council is done [2010] No. 33), became the milestone of prevention and control of air pollution.In September, 2013, State Council has issued " prevention and control of air pollution action plan " (being called for short " ten, air "), and prevention and control of air pollution work is goed deep into crucial point further.Relevant research shows, the row of haze becomes mechanism very complicated, and wherein the contribution of volatile organic matter (VOCs) and nitrogen oxide (NOx) can not be ignored.Be discharged into the VOCs meeting in air and NOx, SO
2there is photochemical reaction under certain condition Deng pollutant, produce the secondary pollution such as fine particle, ozone, increase the weight of haze and pollute.Therefore the emission control of VOCs and NOx has material impact to the success or failure that haze is administered, and also becomes an important Air Pollution Control index.
Utility model content
The purpose of this utility model is for solving above-mentioned deficiency, provides the tail gas catalyzed burning of a kind of acrylonitrile plant and denitrification apparatus.
The purpose of this utility model is achieved through the following technical solutions:
A kind of tail gas catalyzed burning of acrylonitrile plant and denitrification apparatus, comprise smoke catalytic and burn unit, ammonia dilution unit, waste heat recovery unit, spray ammonia unit, drum, Benitration reactor and chimney, smoke catalytic burns unit and connects waste heat recovery unit and spray ammonia unit respectively, ammonia dilution unit connects spray ammonia unit, waste heat recovery unit connects drum, spray ammonia unit connects Benitration reactor, gas after denitration enters chimney, described smoke catalytic burns unit and comprises oxygenating air blast, separator, plate type heat exchanger, go into operation electric heater and catalytic burning reactor, flue gas and jointly enter separator through the air of oxygenating air blast, gas after separation enters plate type heat exchanger, gas after heat exchange enters the electric heater that goes into operation, gas after heating enters catalytic burning reactor.
The utility model also has some technical characteristics like this:
Ammonia dilution unit comprises dilution air and ammonia/empty blender, and ammonia and the air through dilution air enter ammonia/empty blender jointly.
Waste heat recovery unit comprises waste heat boiler, for the recuperation of heat of part high-temperature flue gas.
Burn and also comprise flue gas flow detection system, NOx, O with denitrification apparatus
2the gentle ammonia flow control system of detection system.
Benitration reactor also comprises high temperature catalyst, for 300 ~ 500 DEG C time, promotes that NOx and ammonia carry out reaction and generate N
2and H
2o.
Spray ammonia unit comprises ammonia-spraying grid and flue gas rectifier, and ammonia/empty blender connects ammonia-spraying grid, and ammonia-spraying grid connects flue gas rectifier, and ammonia-spraying grid connects Benitration reactor.
The utility model has effect useful as follows:
The utility model is reasonable in design, easy to use, floor space is little, and cost is low, and heat recovery rate is high, discharge after clean flue gas after denitration and former flue gas are carried out heat exchange, can, by raw flue gas preheating, make system reach thermal balance, the waste heat of the high-temperature flue gas of catalytic burning is reclaimed, economize energy, has good application prospect.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, a kind of tail gas catalyzed burning of acrylonitrile plant and denitrification apparatus, comprise smoke catalytic and burn unit, ammonia dilution unit, waste heat recovery unit, spray ammonia unit, drum 11, Benitration reactor 12 and chimney 13, smoke catalytic burns unit and connects waste heat recovery unit and spray ammonia unit respectively, ammonia dilution unit connects spray ammonia unit, waste heat recovery unit connects drum 11, spray ammonia unit connects Benitration reactor 12, gas after denitration enters chimney 13, described smoke catalytic burns unit and comprises oxygenating air blast 1, separator 2, plate type heat exchanger 3, go into operation electric heater 4 and catalytic burning reactor 5, flue gas and jointly enter separator 2 through the air of oxygenating air blast 1, gas after separation enters plate type heat exchanger 3, gas after heat exchange enters the electric heater 4 that goes into operation, gas after heating enters catalytic burning reactor 5, ammonia dilution unit comprises dilution air 7 and ammonia/empty blender 8, ammonia and jointly enter ammonia/empty blender 8 through the air of dilution air 7, waste heat recovery unit comprises waste heat boiler 6, for the recuperation of heat of part high-temperature flue gas, burn and also comprise flue gas flow detection system with denitrification apparatus, NOx, O
2the gentle ammonia flow control system of detection system, Benitration reactor also comprises high temperature catalyst, for 300 ~ 500 DEG C time, promotes that NOx and ammonia carry out reaction and generate N
2and H
2o, spray ammonia unit comprises ammonia-spraying grid 10 and flue gas rectifier 9, and ammonia/empty blender 8 connects ammonia-spraying grid 10, and ammonia-spraying grid 10 connects flue gas rectifier 9, and ammonia-spraying grid 10 connects Benitration reactor 12.
Dilution air, for extracting required dilution wind;
Ammonia/empty blender, being connected with dilution wind heater, for being mixed with the dilution wind after heating by gas ammonia, making gas ammonia content be less than 5%;
Oxygenating air blast, for oxygen needed for supplementary catalytic burning, catalytic burning is reacted can fully be completed;
Separator, for fully to mix oxygenating air with former flue gas and by wherein moisture removal;
Plate type heat exchanger, carries out heat exchange by former flue gas and clean flue gas, for realizing the preheating of former flue gas;
Go into operation electric heater, uses, for heating the mist of oxygenating air and former flue gas when going into operation;
Catalytic burning reactor, for providing catalytic burning reaction compartment;
Ammonia-spraying grid, is injected in flue uniformly for making ammonia/empty gaseous mixture;
Flue gas rectifier, is placed in below ammonia-spraying grid, above high temperature catalyst, fully mixes for making ammonia/empty gaseous mixture and ensures to flow to perpendicular to catalyst with the flue gas of 420 DEG C;
Flue gas flow detection system, for detecting flue gas flow;
NOx, O
2detection system, for detection reaction device entrance and exit NOx and O
2content;
Gas ammonia flow control system, for passing through NOx, O
2after the detected value of detection system and the detected value of flue gas flow calculate, the strict flow controlling gas ammonia;
High temperature catalyst, for 300 ~ 500 DEG C time, promotes that NOx and ammonia carry out reaction and generate N
2and H
2o.
The course of work: first by 48000m
3the oxygenating air of/h and 62000m
335 DEG C of tail gas introducing separators that the acrylonitrile absorbing tower top of/h is discharged mix, and will wherein be separated by moisture; Through be separated after by diluted 110000m
3/ h flue gas is undertaken being preheated to 300 DEG C by plate type heat exchanger.When going into operation, use the heater that goes into operation by the flue gas to 300 DEG C after dilution; Through catalytic burning reactor, through catalyst, there is catalytic burning reaction in the flue gas of 300 DEG C, by NMHC and the CO reaction in flue gas, generates CO
2and H
2o, now reactor outlet flue-gas temperature is 580 DEG C; Make 43000m
3the flue gas of 580 DEG C of/h enters waste heat boiler and carries out heat-obtaining, and after heat-obtaining, flue-gas temperature reduces to 150 DEG C; By the flue gas of 150 DEG C and remaining 67000m
3the flue gas of 580 DEG C of/h is fully mixed to get the flue gas needing denitration of 420 DEG C; By 700m
3the dilution wind of/h and 25m
3/ h gas ammonia fully mixes in gas/ammonia blender, makes the content of ammonia reach less than 5%; Make ammonia content be less than 5% ammonia/empty gaseous mixture spray into through flue through ammonia-spraying grid, mix with the flue gas of 420 DEG C of the rectification through flue gas rectifier; After ammonia/empty gaseous mixture and the flue gas of 420 DEG C fully mix, through catalyst, under the effect of catalyst, the NOx in reducing agent ammonia and flue gas reacts, and generates nitrogen and water; Flue gas flue gas after the pre-hot exhaust gas of plate type heat exchanger, air mixing after denitration, reclaim the flue gas after heat through chimney is up to standard and enter air, exhaust gas temperature is at about 150 DEG C.
Acrylonitrile waste gas catalytic burning effectively combines with denitration by this device, and the part of smoke after catalytic burning is carried out heat-obtaining by waste heat boiler, the deaerated water of 120 DEG C is heated into 1.3MPa, the low-pressure steam 10t/h of 230 DEG C, another part flue gas and the flue gas after heat-obtaining carry out mixing denitration, discharge after finally the clean flue gas after denitration and former flue gas being carried out heat exchange, can by raw flue gas preheating, system is made to reach thermal balance, also the waste heat of the high-temperature flue gas of catalytic burning can be reclaimed, economize energy, NMHC in flue gas (NMHC) content finally can be made by 54761mg/Nm
3be removed to 120mg/Nm
3, CO content is by 11760mg/Nm
3be removed to 80mg/Nm
3, NOx content is by 941mg/Nm
3be removed to 100mg/Nm
3, reach national requirements discharge standard, ensure that the escaping of ammonia only has 3ppm, SO simultaneously
2conversion ratio is also only 1%.
Claims (6)
1. the tail gas catalyzed burning of acrylonitrile plant and denitrification apparatus, comprise smoke catalytic and burn unit, ammonia dilution unit, waste heat recovery unit, spray ammonia unit, drum, Benitration reactor and chimney, it is characterized in that: smoke catalytic burns unit and connects waste heat recovery unit and spray ammonia unit respectively, ammonia dilution unit connects spray ammonia unit, waste heat recovery unit connects drum, spray ammonia unit connects Benitration reactor, gas after denitration enters chimney, described smoke catalytic burns unit and comprises oxygenating air blast, separator, plate type heat exchanger, go into operation electric heater and catalytic burning reactor, flue gas and jointly enter separator through the air of oxygenating air blast, gas after separation enters plate type heat exchanger, gas after heat exchange enters the electric heater that goes into operation, gas after heating enters catalytic burning reactor.
2. the tail gas catalyzed burning of a kind of acrylonitrile plant as claimed in claim 1 and denitrification apparatus, is characterized in that: described ammonia dilution unit comprises dilution air and ammonia/empty blender, and ammonia and the air through dilution air enter ammonia/empty blender jointly.
3. the tail gas catalyzed burning of a kind of acrylonitrile plant as claimed in claim 1 and denitrification apparatus, is characterized in that: described waste heat recovery unit comprises waste heat boiler, for the recuperation of heat of part high-temperature flue gas.
4. the tail gas catalyzed burning of a kind of acrylonitrile plant as claimed in claim 1 and denitrification apparatus, is characterized in that: described burning and denitrification apparatus also comprise flue gas flow detection system, NOx, O
2the gentle ammonia flow control system of detection system.
5. the tail gas catalyzed burning of a kind of acrylonitrile plant as claimed in claim 1 and denitrification apparatus, is characterized in that: described Benitration reactor also comprises high temperature catalyst, for 300 ~ 500 DEG C time, promotes that NOx and ammonia carry out reaction and generate N
2and H
2o.
6. the tail gas catalyzed burning of a kind of acrylonitrile plant as claimed in claim 1 and denitrification apparatus, it is characterized in that: described spray ammonia unit comprises ammonia-spraying grid and flue gas rectifier, ammonia/empty blender connects ammonia-spraying grid, and ammonia-spraying grid connects flue gas rectifier, and ammonia-spraying grid connects Benitration reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520378913.7U CN204806415U (en) | 2015-06-05 | 2015-06-05 | Tail gas catalysis of acrylonitrile factory is burned and denitrification facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520378913.7U CN204806415U (en) | 2015-06-05 | 2015-06-05 | Tail gas catalysis of acrylonitrile factory is burned and denitrification facility |
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|---|---|
| CN204806415U true CN204806415U (en) | 2015-11-25 |
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ID=54591233
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|---|---|---|---|
| CN201520378913.7U Active CN204806415U (en) | 2015-06-05 | 2015-06-05 | Tail gas catalysis of acrylonitrile factory is burned and denitrification facility |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668157A (en) * | 2018-12-27 | 2019-04-23 | 北京中电联环保股份有限公司 | Waste gas catalytic incineration processing system and its adjustment control method |
| CN110975599A (en) * | 2019-10-30 | 2020-04-10 | 江苏天莱环保工程有限公司 | In-furnace denitration system and process |
| CN112844038A (en) * | 2020-12-31 | 2021-05-28 | 上海华谊新材料有限公司 | Exhaust gas treatment system and exhaust gas treatment method |
| CN115597074A (en) * | 2022-09-28 | 2023-01-13 | 上海安居乐环保科技股份有限公司（Cn） | Acrylonitrile device tail gas treatment system |
-
2015
- 2015-06-05 CN CN201520378913.7U patent/CN204806415U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668157A (en) * | 2018-12-27 | 2019-04-23 | 北京中电联环保股份有限公司 | Waste gas catalytic incineration processing system and its adjustment control method |
| CN110975599A (en) * | 2019-10-30 | 2020-04-10 | 江苏天莱环保工程有限公司 | In-furnace denitration system and process |
| CN112844038A (en) * | 2020-12-31 | 2021-05-28 | 上海华谊新材料有限公司 | Exhaust gas treatment system and exhaust gas treatment method |
| CN115597074A (en) * | 2022-09-28 | 2023-01-13 | 上海安居乐环保科技股份有限公司（Cn） | Acrylonitrile device tail gas treatment system |
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| GR01 | Patent grant |