CN101760251B - New water-saving, energy-saving and less-equipment corrosion process and device for purifying coke oven gas - Google Patents
New water-saving, energy-saving and less-equipment corrosion process and device for purifying coke oven gas Download PDFInfo
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- CN101760251B CN101760251B CN2009102488540A CN200910248854A CN101760251B CN 101760251 B CN101760251 B CN 101760251B CN 2009102488540 A CN2009102488540 A CN 2009102488540A CN 200910248854 A CN200910248854 A CN 200910248854A CN 101760251 B CN101760251 B CN 101760251B
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Abstract
The invention relates to a new water-saving, energy-saving and less-equipment corrosion process and a new water-saving, energy-saving and less-equipment corrosion device for purifying coke oven gas. In the process and the device, benzol separation water in a benzol distilling device is adopted to dilute final cooling circulation liquid in a final cooling tower; and final cooling sewerage of a final cooling benzol washing device is taken as complex acid of an ammonium sulphate device and water for washing a spraying saturator. The process and the device have the advantages that in the process, the benzol separation water is adopted to dilute the final cooling circulation liquid in the final cooling tower, so that the concentration of acid in the final cooling circulation liquid is reduced effectively, and the corrosion of the final cooling circulation liquid containing the acid on a final cooling system is relieved; the final cooling sewerage of the final cooling tower is taken as the complex acid of the ammonium sulphate device and the water for washing the spraying saturator, so that the consumption level of new industrial water is reduced effectively, and the benzol separation water and the final cooling sewerage are not subjected to ammonia evaporation, and thus the load of a ammonia still, the energy consumption of ammonia evaporation and the consumption of the cooling water are reduced.
Description
Technical field
The present invention relates to a kind of coke-oven plant fine purification technique for coke oven gas and device, particularly a kind of water saving, energy-conservation and reduce coke oven gas purification new technology and the device of equipment corrosion.
Background technology
In the prior art, the technique that the gas purification process of coke-oven plant adopts spray saturator production sulphur ammonium, whole cold wash benzene, tube oven method to take off benzene mostly.This Brief Introduction of Process following (seeing Fig. 4):
1) ammonium sulfate device: deamination, the coal gas that do not take off benzene do not enter the spray saturator, and coal gas contacts with circulating mother liquor in the spray saturator, and ammonia wherein is recycled the sulfuric acid absorption in the mother liquor, generation ammonium sulfate;
2) whole cold wash benzene device: the coal gas behind the deamination enters the gas final cold tower and washes the benzene tower with delivering to after the coal gas cooling, oil-poorly benzene in the coal gas is removed the generation rich oil with what the crude benzol distilling apparatus was sent here washing the benzene tower;
3) crude benzol distilling apparatus: the rich oil of washing behind the benzene is delivered to debenzolizing tower, takes off to become behind the benzene and oil-poorly removes to wash the benzene tower and recycle.
Produce in the process of sulphur ammonium at the spray saturator, when the flushing of pipeline, saturator and circulating mother liquor acid adding, all need to replenish new water in circulating mother liquor, the additional of new water is to adopt industry water in conventional design.
In the process of gas final cold tower with coal gas cooling, because gas temperature reduces, the steam condensation in the coal gas gets off to generate condensate liquid, and condensate liquid is sent to as whole cold type sewage and goes ammonia still process after the condensation air-blast device is mixed into remained ammonia.
At the crude benzol distilling apparatus, regenerating wash oil need to be used the live (open) steam stripping, and rich oil de-benzene need to be used live (open) steam stripping and distillation; Bringing crude benzol Separation of Water that system generates into by live (open) steam is sent to and goes ammonia still process after the condensation air-blast device is mixed into remained ammonia.
There is following problem in above-mentioned gas purification process:
1) when the spray flushing of saturator and circulating mother liquor acid adding, need in circulating mother liquor, replenish industrial fresh water;
2) coal gas after the spray saturator is processed is carried a small amount of sulfuric acid secretly to final cooling tower, so that contain a small amount of sulfuric acid in the cold lime set eventually, whole cooling system is had certain corrosion;
3) final cooling tower out whole cold type sewage and the crude benzol Separation of Water of crude benzol distilling apparatus in do not contain ammonia and but sneak into remained ammonia, go ammonia still process as the raw material ammonia water of ammonia still process, increase the load of ammonia still, also increase the consumption of ammonia still process energy consumption and cooling water;
4) whole cold type sewage is sneaked into remained ammonia, with a small amount of sulfuric acid, increases fixed ammonia content in the raw material ammonia water, increases the alkali consumption that decomposes fixed ammonia.
Summary of the invention
The purpose of this invention is to provide a kind of water saving, energy-conservation and reduce coke oven gas purification new technology and the device of equipment corrosion, this technique and device can effectively reduce the concentration of acid in the whole cold circulation fluid, alleviating eventually, cold circulation fluid effectively reduces the consumption of industrial fresh water because containing acid to the corrosion of whole cooling system.Simultaneously, because crude benzol Separation of Water and whole cold type sewage do not go ammonia still process, reduced the consumption of ammonia still load, ammonia still process energy consumption and cooling water.
For achieving the above object, the present invention is achieved through the following technical solutions:
The present invention has provided three kinds of schemes of fine purification technique for coke oven gas:
The first scheme: a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the crude benzol Separation of Water that the crude benzol distilling apparatus generates is sent into the final cooling tower of whole cold wash benzene device, is used for eventually cold lime set of dilution.
First scheme: a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the crude benzol Separation of Water that the crude benzol distilling apparatus generates is sent into the final cooling tower of whole cold wash benzene device, is used for eventually cold lime set of dilution; The whole cold type sewage that whole cold wash benzene device produces as the supplementing water loopback of the complex acid of ammonium sulfate device and spray saturator wash water to ammonium sulfate device.
The third scheme: a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the whole cold type sewage that whole cold wash benzene device produces as the supplementing water loopback of the complex acid of ammonium sulfate device and spray saturator wash water to ammonium sulfate device.
A kind of water saving, energy-conservation and reduce the device of the coke oven gas purification new technology of equipment corrosion, the crude benzol Separation of Water in the crude benzol distilling apparatus is connected bottom the final cooling tower of connecting line and whole cold wash benzene device; The whole cold type sewage of whole cold wash benzene device is connected with ammonium sulfate device by connecting line.
Compared with prior art, the invention has the beneficial effects as follows:
1) this process using crude benzol Separation of Water dilutes the cold circulation fluid at end in final cooling tower, effectively reduces the concentration of acid in the whole cold circulation fluid, alleviates whole cold circulation fluid because containing acid to the corrosion of whole cooling system;
2) use the whole cold type sewage of final cooling tower as complex acid and the spray saturator wash water of ammonium sulfate device, effectively reduced the consumption of industrial fresh water;
3) because crude benzol Separation of Water and whole cold type sewage do not go ammonia still process, reduced the consumption of ammonia still load, ammonia still process energy consumption and cooling water.
Description of drawings
Fig. 1 is the process chart of the embodiment of the invention 1;
Fig. 2 is the process chart of the embodiment of the invention 2;
Fig. 3 is the process chart of the embodiment of the invention 3;
Fig. 4 is the process chart of prior art.
The specific embodiment
See Fig. 1, a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, technical process is: generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the crude benzol Separation of Water that the crude benzol distilling apparatus generates is sent into the final cooling tower of whole cold wash benzene device through connecting line 1, is used for eventually cold lime set of dilution; The whole cold type sewage that whole cold wash benzene device produces is sent into the thiamines device as the supplementing water of the complex acid of ammonium sulfate device and spray saturator wash water by connecting line 2.
See Fig. 2, a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the crude benzol Separation of Water that the crude benzol distilling apparatus generates is sent into the final cooling tower of whole cold wash benzene device through connecting line 1, is used for eventually cold lime set of dilution.In the process of gas final cold tower with coal gas cooling, because gas temperature reduces, the steam condensation in the coal gas gets off to generate condensate liquid, and condensate liquid is sent to as whole cold type sewage and goes ammonia still process after the condensation air-blast device is mixed into remained ammonia.
Embodiment 3
See Fig. 3, a kind of water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, the whole cold type sewage that whole cold wash benzene device produces through connecting line 2 loopbacks to ammonium sulfate device, as the supplementing water of complex acid and the spray saturator wash water of ammonium sulfate device.The crude benzol Separation of Water is sent to and goes ammonia still process after the condensation air-blast device is mixed into remained ammonia.
Claims (1)
1. a water saving, energy-conservation and reduce the coke oven gas purification new technology of equipment corrosion, generate purified gas after the processing such as the raw coke oven gas process condensation air-blast device that compressed air source unit produces, ammonium sulfate device, whole cold wash benzene device, the rich oil that produces after whole cold wash benzene device is washed benzene is delivered to the crude benzol distilling apparatus and is generated crude benzol through distillation, it is characterized in that, the crude benzol Separation of Water that the crude benzol distilling apparatus generates is sent into the final cooling tower of whole cold wash benzene device, is used for eventually cold lime set of dilution; The whole cold type sewage that described whole cold wash benzene device produces as the supplementing water loopback of the complex acid of ammonium sulfate device and spray saturator wash water to ammonium sulfate device; Crude benzol Separation of Water in the crude benzol distilling apparatus is connected with the final cooling tower bottom of whole cold wash benzene device by connecting line; The whole cold type sewage of whole cold wash benzene device is connected with ammonium sulfate device by connecting line.
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| CN2009102488540A CN101760251B (en) | 2009-12-29 | 2009-12-29 | New water-saving, energy-saving and less-equipment corrosion process and device for purifying coke oven gas |
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| CN2009102488540A CN101760251B (en) | 2009-12-29 | 2009-12-29 | New water-saving, energy-saving and less-equipment corrosion process and device for purifying coke oven gas |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485851A (en) * | 2010-12-01 | 2012-06-06 | 鞍钢集团工程技术有限公司 | Method and apparatus for removing acid-containing droplet in gas from soda acid neutralization deamination |
| CN104962322B (en) * | 2015-06-12 | 2018-05-15 | 江苏永钢集团有限公司 | Coke oven gas purification system |
| CN105154144B (en) * | 2015-08-31 | 2017-12-26 | 山东铁雄新沙能源有限公司 | A kind of negative pressure benzene removal device and de- benzene method |
| CN105238450A (en) * | 2015-09-29 | 2016-01-13 | 山东钢铁股份有限公司 | Purifying method of coke oven gas |
| CN108910985A (en) * | 2018-08-10 | 2018-11-30 | 中化蓝天霍尼韦尔新材料有限公司 | A kind of lime set processing system and processing method |
| CN113599850B (en) * | 2021-08-16 | 2023-02-28 | 铜陵泰富特种材料有限公司 | Method for recycling waste heat of rich oil heater |
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| CN1263932A (en) * | 2000-02-29 | 2000-08-23 | 中国冶金建设集团鞍山焦化耐火材料设计研究总院 | Process for final cooling, alkali washing and fine desulfurizing of coke oven gas |
| CN101570701A (en) * | 2008-05-04 | 2009-11-04 | 鞍钢集团设计研究院 | Process for coke oven gas purification |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263932A (en) * | 2000-02-29 | 2000-08-23 | 中国冶金建设集团鞍山焦化耐火材料设计研究总院 | Process for final cooling, alkali washing and fine desulfurizing of coke oven gas |
| CN101570701A (en) * | 2008-05-04 | 2009-11-04 | 鞍钢集团设计研究院 | Process for coke oven gas purification |
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