CN205288014U - Acrylonitrile off -gas concentrates discharge system - Google Patents
Acrylonitrile off -gas concentrates discharge system Download PDFInfo
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- CN205288014U CN205288014U CN201520652261.1U CN201520652261U CN205288014U CN 205288014 U CN205288014 U CN 205288014U CN 201520652261 U CN201520652261 U CN 201520652261U CN 205288014 U CN205288014 U CN 205288014U
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Abstract
The utility model relates to an acrylonitrile off -gas concentrates discharge system. An acrylonitrile off -gas concentrates discharge system which characterized in that includes: gaseous buffer tank, tail gas air -bleed system, exhaust gas collection pipeline and tail gas discharge pipe. It carries to the tail gas buffer to utilize the exhaust gas collection pipeline to concentrate acrylonitrile device tail gas, and it carries to follow -up device via tail gas discharge pipe to utilize the tail gas of tail gas air -bleed system in with the tail gas buffer. According to the utility model discloses an acrylonitrile off -gas concentrates discharge system can the centre discharges acrylonitrile device tail gas, reduces or eliminates the pollution of acrylonitrile device to the environment even to reduce tail gas treatment cost.
Description
Technical field
This utility model relates to the collection of a kind of acrylonitrile installation tail gas, concentrates exhaust system.
Background technology
Producing in the technique of acrylonitrile at propylene ammonia catalytic, main waste gas is the process tail gas gone out from absorbing tower top row, i.e. tail gas from absorption tower (AOG, AbsorbedOffGas). In tail gas from absorption tower, except key component nitrogen, also include non-methane hydrocarbon (CHx), carbon monoxide, carbon dioxide, nitrogen oxides (NOx) and pollutant such as a small amount of propylene is fine, it is one of main pollution of producing of petroleum chemical industry.
In the process to tail gas from absorption tower, it is direct emptying in early days. Recently as the increasingly stringent of environmental requirement, this partial tail gas is substantially achieved to be dealt carefully with, and processing method is mainly heating power and burns and catalytic burning.
Except tail gas from absorption tower, acrylonitrile installation comprises substantial amounts of uncontrollable discharge gas, mainly includes the respiratory gas of storage tank and the aerofluxus of vacuum pump etc. (hereinafter referred to as other tail gas). The processing method majority of these gases is emptying on the spot after chilled water washing at present. Although after being washed, the content of organics in other tail gas has a degree of decline, but is as the raising of environmental protection standard, this washing methods process after tail gas after can not directly emptying; Amorphous emptying on the spot simultaneously is also unfavorable for management. On the other hand, if being separately provided the device processing other tail gas again, except causing cost to increase, certain space also can be taken.
If it is possible to by tail gas from absorption tower and other tail gas centralized collection, process and discharge, the pollution to environment can not only be reduced, moreover it is possible to save cost.
Utility model content
The purpose of this utility model is in that to provide the concentration exhaust system of a kind of acrylonitrile installation tail gas.
One side of the present utility model provides a kind of acrylonitrile off-gas to concentrate exhaust system, including: tail gas buffer; Exhaust collection pipeline, for collecting the tail gas of each position generation and being delivered in described tail gas buffer; Exhaust emission tube road; Tail gas extract system, for extracting out the tail gas in described tail gas buffer through described exhaust emission tube road, thus being delivered to follow up device; Water at low temperature adds pipeline, for adding cold washing water in described tail gas buffer; Water at low temperature discharge line, for discharging the cold washing water in described tail gas buffer; Tail gas exhausting pipeline, for by the tail gas emptying after washing; With water structure.
Preferably, described tail gas extract system includes vacuum pump.
Preferably, the compression ratio of described vacuum pump is 1.05��5.
Preferably, the compression ratio of described vacuum pump is 1.1��2.
Preferably, acrylonitrile off-gas of the present utility model concentrates exhaust system, also include termination of pumping detection system, this termination of pumping detection system is connected to described tail gas extract system, described water at low temperature adds pipeline and described tail gas exhausting pipeline, and to the controller generation signal of described water at low temperature addition pipeline and the switch valve of described tail gas exhausting pipeline, to open or close the described switch valve of described water at low temperature addition pipeline and described tail gas exhausting pipeline.
Preferably, concentrating in exhaust system at acrylonitrile off-gas of the present utility model, the temperature being added the water at low temperature that pipeline adds by described water at low temperature is 5��30 DEG C.
Exhaust system is concentrated, it is possible to solving above-mentioned technical problem, namely traditional washing methods can not meet the environmental requirement day by day improved according to tail gas provided by the utility model.
Accompanying drawing explanation
Fig. 1 is the process chart of the acrylonitrile installation tail gas concentration exhaust system of the first embodiment of the present utility model.
Fig. 2 is the process chart of the acrylonitrile installation tail gas concentration exhaust system of the second embodiment of the present utility model.
Fig. 3 is the process chart of the acrylonitrile installation tail gas concentration exhaust system of the 3rd embodiment of the present utility model.
Reference numerals list
1 tail gas buffer
2 tail gas extract systems
3 exhaust collection pipelines
4 exhaust emission tube roads
5 tail gas exhausting pipelines
6 water at low temperature add pipeline
7 water at low temperature discharge lines
8 water structures
9 termination of pumping detection systems
10 tail gas exhausting pipeline switch valves
11 water at low temperature add pipeline switch valve
Detailed description of the invention
Below with reference to accompanying drawing, acrylonitrile installation tail gas centralized collection of the present utility model, exhaust system are described in detail.
[the first embodiment]
Acrylonitrile installation tail gas of the present utility model concentrates exhaust system I to include tail gas buffer 1, tail gas extract system 2, exhaust collection pipeline 3 and exhaust emission tube road 4. Exhaust collection pipeline 3 is connected to the offgas outlet of the devices such as absorption tower tower top, storage tank and vacuum pump via multiple pipeline (not shown), sends into tail gas buffer 1 thus being concentrated by the acrylonitrile installation tail gas of script uncontrollable discharge. After tail gas cushions in tail gas buffer 1, utilize tail gas extract system 2 that via exhaust emission tube road 4 and tail gas extract system 2, the tail gas after the buffering in tail gas buffer 1 is delivered to exhaust gas processing device (not shown).
The material manufacturing tail gas buffer 1, exhaust collection pipeline 3 and exhaust emission tube road 4 is not specifically limited, as long as material commonly used in the art. The instantiation of tail gas extract system 2 includes but not limited to vacuum pump etc. Herein, the compression ratio of vacuum pump is 1.05��5, it is preferred to 1.1��2. Follow up device can be acrylonitrile off-gas is degraded or the device of other process, for instance heating power incinerator or catalytic burning stove etc., it is also possible to is the chilling tower or absorption tower etc. that again absorb of the components such as a small amount of acrylonitrile in tail gas. Under normal circumstances, the tail gas of centralized collection is preferably delivered to absorption tower again to absorb. When some problem occurs, for instance, absorption tower hypertonia, it is impossible to when tail gas is delivered to absorption tower, then tail gas is delivered to incinerator and burns.
[the second embodiment]
Describe acrylonitrile installation tail gas of the present utility model below with reference to Fig. 2 and concentrate the second embodiment of exhaust system.Parts identical with the first embodiment in second embodiment are carried out labelling with the accompanying drawing labelling identical with the first embodiment, and the descriptions thereof are omitted.
As in figure 2 it is shown, acrylonitrile installation tail gas concentrates exhaust system II to include tail gas buffer 1, tail gas extract system 2, exhaust collection pipeline 3, exhaust emission tube road 4, tail gas exhausting pipeline 5, water at low temperature addition pipeline 6, water at low temperature discharge line 7, water structure 8, tail gas exhausting pipeline switch valve 10 and water at low temperature adds pipeline switch valve 11.
When tail gas concentrate exhaust system normal operation, the tail gas of acrylonitrile installation as described in the first embodiment be transported to the device carrying out degrading or process like that. And when tail gas extract system 2 breaks down, operation tail gas exhausting pipeline switch valve 10 and water at low temperature add pipeline switch valve 11, by tail gas exhausting pipeline 5, water at low temperature adds pipeline 6 and water at low temperature discharge line 7 is opened. Add pipeline 6 from water at low temperature and add cold washing water to tail gas buffer 1, tail gas is washed. By the tail gas after washing from tail gas exhausting pipeline 5 emptying. Subsequently, after cold washing water enters surge tank 1 in a large number, the water seal of the water structure 8 of water at low temperature discharge line 7 is broken through, from flowing into downstream row dirt pipeline (not shown). Water structure 8 has sealing structure for water, leaves liquid at sealing structure for water place at ordinary times, collects the liquid in tank and is enclosed in tail gas buffer 1 and water at low temperature discharge line 7 the inside by water seal. And added pipeline 6 by cold washing water to after tail gas buffer 1 adds cold washing water, when liquid level reach a certain height, it is possible to automatically break through water seal and discharge from water at low temperature discharge line 7.
When the temperature of cold washing water is more than 30 DEG C, can cause that organic absorbance declines. And when temperature is lower than 5 DEG C, there is freezing pipeline. Therefore, the temperature of cold washing water is preferably 5��30 DEG C.
After the failture evacuation of tail gas extract system 2, termination of pumping signal relief. Operation tail gas exhausting pipeline switch valve 10 and water at low temperature add pipeline switch valve 11, tail gas exhausting pipeline 5 and water at low temperature are added pipeline 6 and closes. Thus recovering to enter follow up device from exhaust emission tube road via tail gas extract system.
[the 3rd embodiment]
Describe acrylonitrile installation tail gas of the present utility model below with reference to Fig. 3 and concentrate the 3rd embodiment of exhaust system. Parts identical with the first embodiment and the second embodiment in 3rd embodiment are carried out labelling with the accompanying drawing labelling identical with the first embodiment and the second embodiment, and the descriptions thereof are omitted.
As it is shown on figure 3, acrylonitrile installation tail gas concentrates exhaust system III to include tail gas buffer 1, tail gas extract system 2, exhaust collection pipeline 3, exhaust emission tube road 4, tail gas exhausting pipeline 5, water at low temperature addition pipeline 6, water at low temperature discharge line 7, water structure 8, termination of pumping detection system 9, tail gas exhausting pipeline switch valve 10 and water at low temperature adds pipeline switch valve 11. Termination of pumping detection system 9 is connected to the air pump of tail gas extract system 2. Additionally, termination of pumping detection system 9 is additionally coupled to tail gas exhausting pipeline switch valve 10 and water at low temperature adds pipeline switch valve 11, and send control signal to close above-mentioned valve after opening to the controller of these two valves.
When tail gas concentrate exhaust system normal operation, the tail gas of acrylonitrile installation as described in the first embodiment be transported to the device carrying out degrading or process like that. And when tail gas extract system 2 breaks down, air pump detects system 9 to termination of pumping and sends termination of pumping signal.After termination of pumping signal being detected, the controller that termination of pumping detection system 9 adds pipeline switch valve 11 to tail gas exhausting pipeline switch valve 10 and water at low temperature sends order, tail gas exhausting pipeline 5 and water at low temperature is added pipeline 6 and opens. Add pipeline 6 from water at low temperature and add cold washing water to tail gas buffer 1, by tail gas from tail gas exhausting pipeline 5 emptying. Subsequently, after cold washing water enters surge tank 1 in a large number, the water seal of the water structure 8 of water at low temperature discharge line 7 is broken through, from flowing into downstream row dirt pipeline (not shown).
After the failture evacuation of tail gas extract system 2, termination of pumping signal relief. Termination of pumping detection system 9 adds pipeline switch valve 11 controller to tail gas exhausting pipeline switch valve 10 and water at low temperature and sends order, tail gas exhausting pipeline 5 and water at low temperature is added pipeline 6 and closes. Thus recovering to enter follow up device from exhaust emission tube road via tail gas extract system.
Concentrate exhaust system according to acrylonitrile off-gas of the present utility model, it is possible to intensively discharge acrylonitrile installation tail gas, reduce or even eliminate the acrylonitrile installation pollution to environment, and reducing vent gas treatment cost.
Concentrate tapping equipment to be described acrylonitrile off-gas of the present utility model according to detailed description of the invention, but this utility model is not limited to this, and according to practical situation, the parts constituting acrylonitrile off-gas concentration tapping equipment can be modified or improved.
Claims (6)
1. an acrylonitrile off-gas concentrates exhaust system, it is characterised in that including:
Tail gas buffer;
Exhaust collection pipeline, for collecting the tail gas of each position generation and being delivered in described tail gas buffer;
Exhaust emission tube road;
Tail gas extract system, for extracting out the tail gas in described tail gas buffer through described exhaust emission tube road, thus being delivered to follow up device;
Water at low temperature adds pipeline, for adding cold washing water in described tail gas buffer;
Water at low temperature discharge line, for discharging the cold washing water in described tail gas buffer;
Tail gas exhausting pipeline, for by the tail gas emptying after washing; With
Water structure.
2. acrylonitrile off-gas concentrates exhaust system according to claim 1, it is characterised in that described tail gas extract system includes vacuum pump.
3. acrylonitrile off-gas according to claim 2 concentrates exhaust system, it is characterised in that the compression ratio of described vacuum pump is 1.05��5.
4. acrylonitrile off-gas according to claim 3 concentrates exhaust system, it is characterised in that the compression ratio of described vacuum pump is 1.1��2.
5. acrylonitrile off-gas according to claim 1 concentrates exhaust system, it is characterised in that also include:
Termination of pumping detection system, this termination of pumping detection system is connected to described tail gas extract system, described water at low temperature adds pipeline, described water at low temperature discharge line and described tail gas exhausting pipeline, and to the controller generation signal of described water at low temperature addition pipeline and the switch valve of described water at low temperature discharge line, to open or close described water at low temperature addition pipeline and described water at low temperature discharge line.
6. acrylonitrile off-gas according to claim 5 concentrates exhaust system, it is characterised in that the temperature being added the water at low temperature that pipeline adds by described water at low temperature is 5��30 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520652261.1U CN205288014U (en) | 2015-08-26 | 2015-08-26 | Acrylonitrile off -gas concentrates discharge system |
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| CN201520652261.1U CN205288014U (en) | 2015-08-26 | 2015-08-26 | Acrylonitrile off -gas concentrates discharge system |
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| CN205288014U true CN205288014U (en) | 2016-06-08 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106474878A (en) * | 2015-08-26 | 2017-03-08 | 中国石油化工股份有限公司 | Acrylonitrile off-gas concentrate exhaust system and acrylonitrile off-gas to concentrate discharge method |
| CN106499954A (en) * | 2016-11-03 | 2017-03-15 | 北京航天试验技术研究所 | A kind of hydrogen manages safe venting system concentratedly |
| CN112439296A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | Low-temperature circulation process for bottom of absorption tower of acrylonitrile device |
| CN113324178A (en) * | 2021-07-05 | 2021-08-31 | 陕西金开利洁净安装工程有限公司 | High-concentration organic waste gas collecting and conveying system |
-
2015
- 2015-08-26 CN CN201520652261.1U patent/CN205288014U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106474878A (en) * | 2015-08-26 | 2017-03-08 | 中国石油化工股份有限公司 | Acrylonitrile off-gas concentrate exhaust system and acrylonitrile off-gas to concentrate discharge method |
| CN106474878B (en) * | 2015-08-26 | 2024-03-26 | 中国石油化工股份有限公司 | Acrylonitrile tail gas centralized discharge system and acrylonitrile tail gas centralized discharge method |
| CN106499954A (en) * | 2016-11-03 | 2017-03-15 | 北京航天试验技术研究所 | A kind of hydrogen manages safe venting system concentratedly |
| CN112439296A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | Low-temperature circulation process for bottom of absorption tower of acrylonitrile device |
| CN113324178A (en) * | 2021-07-05 | 2021-08-31 | 陕西金开利洁净安装工程有限公司 | High-concentration organic waste gas collecting and conveying system |
| CN113324178B (en) * | 2021-07-05 | 2024-04-02 | 陕西金开利洁净安装工程有限公司 | High-concentration organic waste gas collecting and conveying system |
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