CN108380005A - A kind of de- benzene device of low energy consumption local decompression and its de- benzene method - Google Patents
A kind of de- benzene device of low energy consumption local decompression and its de- benzene method Download PDFInfo
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- CN108380005A CN108380005A CN201810345236.7A CN201810345236A CN108380005A CN 108380005 A CN108380005 A CN 108380005A CN 201810345236 A CN201810345236 A CN 201810345236A CN 108380005 A CN108380005 A CN 108380005A
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- Prior art keywords
- benzene
- oil
- energy consumption
- slot
- debenzolizing tower
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
Abstract
The present invention relates to a kind of low energy consumption local decompressions to take off benzene device and its de- benzene method, including the heat exchange of debenzolized oil oil, washing oil heating, de- benzene fixed gas condensing recovery, vacuum pump set, regenerated liquid circulating gas-lifting and benzene separation and recovery etc..The present invention fully parses the rich oil for washing benzene, effectively reduces the benzene content in washing oil, and residual benzene content is reduced to minimum（＜ 0.2g/l）, other impurity such as harmful all by regeneration removal system outside, fully improve washing oil quality, extend physical life.
Description
Technical field
The present invention relates to a kind of de-benzene process technologies, take off benzene device more particularly, to a kind of low energy consumption local decompression and its take off
Benzene method.
Background technology
With the fast development of petrochemical industry and coal chemical industry, the environmental consciousness of people increasingly improves, exhaust gas, waste water,
Waste sludge discharge problem causes global extensive attention.Coking industry scale is huge in China, and annual production capacity is at 4.5 hundred million tons
More than.
Related product is recovered as enterprise and brings great economic benefit in coke-stove gas utilization and gas, while avoiding follow-up coal
Harm of the gas deep exploitation to other catalyst.Wherein the content of benzene is in 8g/m3Left and right, and to the recycling of benzene, the country passes
Technology of uniting is constant always, wherein coke-stove gas diamond heating mode is continued up to rich oil heating, so causing energy consumption
Height, there are waste residue, exhaust gas, the big problems of Wastewater Pollutant discharge capacity, in order to solve the above problem, in conjunction with vacuum distillation, UTILIZATION OF VESIDUAL HEAT IN
And washing oil feature, develop this technology.
Invention content
The present invention devises a kind of low energy consumption local decompression is the technical issues of taking off benzene device and its de- benzene method, solve
Coke-stove gas diamond heating mode is continued up to rich oil heating in traditional de-benzene process, so causing that high energy consumption, there are useless
Slag, exhaust gas, the big problem of Wastewater Pollutant discharge capacity.
In order to solve above-mentioned technical problem, present invention employs following scheme：
A kind of de- benzene device of low energy consumption local decompression, washes benzene column（1）The gas-liquid mixture containing benzene of output enters rich oil slot（3）In,
Oil-poor slot（5）In washing oil pass through oil-poor pump（4）Also enter rich oil slot（3）In be mixed with, rich oil slot（3）In mixture it is logical
Cross rich oil pump（2）It exports to heater（8）It is sent after being heated to debenzolizing tower（10）, debenzolizing tower（10）What top came out contains
The mixture of benzene vapor sequentially enters fixed gas cooler（11）, vacuum pump（12）With the separator for carrying out gas-liquid separation（14）,
The benzene separated finally is stored in crude benzol tank（13）In, it is characterised in that：Heater（8）Output enter debenzolizing tower（10）
Top makes benzene vapor uplink, the oily downlink containing benzene；The hot steam and debenzolizing tower that the external world comes（10）Include the washing oil of benzene together into
Enter regenerator（9）Again from debenzolizing tower after parsing（10）Lower part enters so that entering debenzolizing tower containing benzene vapor after parsing（10）Top
Portion, the debenzolizing tower（10）Top passes through the vacuum pump（12）Carrying out Negative pressure reduces tower top distillation boiling point.
Further, the debenzolizing tower（10）Bottom is returned to the washing oil after being detached with benzene by reflux line described oil-poor
Slot（5）Middle recycling.
Further, it is also connected with oily oil heat exchanger on the reflux line（7）, the oil oil heat exchanger（7）Described in entrance
Heater（8）Gas-liquid mixture containing benzene before carries out heating and heats.
Further, close to the oil-poor slot（5）It is additionally provided with oil-poor cooler on the reflux line at end（6）.
Further, the separator（14）The fixed gas also isolated is washed, removes gas main after separation.
A kind of low energy consumption local decompression takes off the de- benzene method of benzene device, includes the following steps：
Step 1 washes benzene column（1）The gas-liquid mixture containing benzene of output enters rich oil slot（3）In, oil-poor slot（5）In washing oil pass through
Oil-poor pump（4）Also enter rich oil slot（3）In be mixed with, rich oil slot（3）In final mixture pumped by rich oil（2）It is delivered to
Heater（8）；
Step 2, the heater（8）The final mixture is heated to 180 DEG C of temperatures above；
Step 3, the heater（8）Output enter debenzolizing tower（10）Top makes benzene vapor uplink, the oily downlink containing benzene；
The hot steam and debenzolizing tower that the external world comes（10）The washing oil for including benzene enters regenerator together（9）Again from debenzolizing tower after parsing（10）Under
Portion enters so that entering debenzolizing tower containing benzene vapor after parsing（10）Top；
Step 4, the debenzolizing tower（10）What top came out enters fixed gas cooler containing benzene vapour（11）After enter back into vacuum pump
（12）, through vacuum pump（12）After extraction, make debenzolizing tower（10）Top is partially formed vacuum, and enhancing distilling effect reduces debenzolizing tower
（10）Temperature；
Step 5, vacuum pump（12）The fixed gas of output is through separator（14）It realizes gas-liquid separation, it is thick to isolate the deposit of product crude benzol
Benzene tank（13）In.
Further, debenzolizing tower in step 3（10）Bottom is returned to the washing oil after being detached with benzene by reflux line described
Oil-poor slot（5）Middle recycling.
Further, it is also connected with oily oil heat exchanger on the reflux line（7）, the oil oil heat exchanger（7）Described in entrance
Heater（8）Gas-liquid mixture containing benzene before carries out heating and heats.
Further, close to the oil-poor slot（5）It is additionally provided with oil-poor cooler on the reflux line at end（6）.
Further, separator described in step 5（14）The fixed gas isolated is washed, removes gas main after separation.
The low energy consumption local decompression takes off benzene device and its de- benzene method has the advantages that：
（1）The present invention both can guarantee that technique used operating index itself, reduce pollutant discharge amount, and can fully recycle benzene resource
The benzene parsing recycling for having both environmental benefit and economic benefit.
（2）The present invention fully parses the rich oil for washing benzene, effectively reduces the benzene content in washing oil, residual benzene content drop
As low as minimum（＜ 0.2g/l）, other impurity such as harmful all by regeneration removal system outside, fully improve washing oil quality, extend
Physical life.
（3）The present invention makes full use of coking prior art to optimize combination, using vacuum system, keeps debenzolizing tower top local
Vacuum is formed, enhancing distilling effect reduces debenzolizing tower top temperature.
（4）Present invention investment is small, operating cost is low, operating flexibility is big, greatly prolongs washing oil utility time, effectively reduces and wash
The % of oil consumption, the benzene rate of recovery >=99 after process takes off benzene practicality before washing oil returns, effectively reduces benzene content in debenzolizing tower exit gas
（≤0.1g/m3, it is far below professional standard）, process energy consumption reduction by 30%, wastewater discharge reduces by 40%.
（5）Present invention process technology is since there is no coke-stove gas, so pollutant SO2, NOx, VOC etc. be not present, accord with
Conjunction national energy recycles and energy-saving and emission-reduction requirement.
Description of the drawings
Fig. 1：Low energy consumption local decompression of the present invention takes off the process flow diagram of benzene device.
Reference sign：
1-washes benzene column；2-rich oils pump；3-rich oil slots；4-oil-poor pumps;5-oil-poor slots；6-oil-poor coolers；7-oily oil change
Hot device；8-heaters；9-regenerators；10-debenzolizing towers；11-fixed gas coolers；12-vacuum pumps；13-crude benzol tanks；
14-separators.
Specific implementation mode
With reference to Fig. 1, the present invention will be further described：
Low energy consumption local decompression de-benzene process technology of the present invention, including the heat exchange of debenzolized oil oil, washing oil heating, de- benzene fixed gas condensation
Recycling, vacuum pump set, regenerated liquid circulating gas-lifting and benzene separation and recovery etc..
As shown in Figure 1, a kind of low energy consumption local decompression takes off benzene device, the gas-liquid mixture containing benzene for washing the output of benzene column 1 enters
In rich oil slot 3, the washing oil in oil-poor slot 5 is also entered in rich oil slot 3 by oil-poor pump 4 to be mixed with, the mixture in rich oil slot 3
It is sent after being heated to heater 8 by 2 output of rich oil pump to debenzolizing tower 10, what 10 top of debenzolizing tower came out contains benzene vapor
Mixture sequentially enter fixed gas cooler 11, vacuum pump 12 and carry out gas-liquid separation separator 14, will finally isolate
In the benzene deposit crude benzol tank 13 come, it is characterised in that：The output of heater 8 enters 10 top of debenzolizing tower and makes on benzene vapor
Row, the oily downlink containing benzene；The hot steam and debenzolizing tower 10 that the external world comes include the washing oil of benzene enter together after regenerator 9 parses again from
10 lower part of debenzolizing tower enters so that entering 10 top of debenzolizing tower containing benzene vapor after parsing, and 10 top of debenzolizing tower passes through vacuum pump 12
Carrying out Negative pressure reduces tower top distillation boiling point.
10 bottom of debenzolizing tower, which is returned to the washing oil after being detached with benzene in oil-poor slot 5 by reflux line, to be recycled.It returns
Oily oil heat exchanger 7 is also connected on flow tube road, oily oil heat exchanger 7 adds the gas-liquid mixture containing benzene before entering heater 8
Heat heats.It is additionally provided with oil-poor cooler 6 on the reflux line close to 5 end of oil-poor slot.The fixed gas that separator 14 is also isolated
Gas main is removed after washed, separation.
The operation principle that low energy consumption local decompression of the present invention takes off benzene device is as follows：
Step 1, the gas-liquid mixture containing benzene for washing the output of benzene column 1 enter in rich oil slot 3, and the washing oil in oil-poor slot 5 passes through oil-poor pump 4
Also enter in rich oil slot 3 and be mixed with, the final mixture in rich oil slot 3 is delivered to heater 8 by rich oil pump 2.
Final mixture is heated to 180 DEG C of temperatures above by step 2, heater 8.
Step 3, heater 8 output enter 10 top of debenzolizing tower and make benzene vapor uplink, the oily downlink containing benzene；It is extraneous
The hot steam and debenzolizing tower 10 come include the washing oil of benzene enter together after regenerator 9 parses enter again from 10 lower part of debenzolizing tower so that
After parsing 10 top of debenzolizing tower is entered containing benzene vapor.
Entering after fixed gas cooler 11 containing benzene vapour for being come out at the top of step 4, debenzolizing tower 10 enters back into vacuum pump 12, passes through
After vacuum pump 12 extracts, the top of debenzolizing tower 10 is made to be partially formed vacuum, enhancing distilling effect reduces by 10 temperature of debenzolizing tower, and takes off
It is lower that benzene column 1 pushes up air outlet temperature.
The fixed gas that step 5, vacuum pump 12 export realizes gas-liquid separation through separator 14, and it is thick to isolate the deposit of product crude benzol
In benzene tank 13.
10 bottom of debenzolizing tower, which is returned to the washing oil after being detached with benzene in oil-poor slot 5 by reflux line, in step 3 recycles
It uses.
Illustrative description is carried out to the present invention above in conjunction with attached drawing, it is clear that realization of the invention is not by aforesaid way
Limitation, as long as use the inventive concept and technical scheme of the present invention progress various improvement, or it is not improved will be of the invention
Design and technical solution directly apply to other occasions, be within the scope of the invention.
Claims (10)
1. a kind of low energy consumption local decompression takes off benzene device, benzene column is washed（1）The gas-liquid mixture containing benzene of output enters rich oil slot（3）
In, oil-poor slot（5）In washing oil pass through oil-poor pump（4）Also enter rich oil slot（3）In be mixed with, rich oil slot（3）In mixing
Object is pumped by rich oil（2）It exports to heater（8）It is sent after being heated to debenzolizing tower（10）, debenzolizing tower（10）Top comes out
The mixture containing benzene vapor sequentially enter fixed gas cooler（11）, vacuum pump（12）With the separator for carrying out gas-liquid separation
（14）, the benzene separated finally is stored in crude benzol tank（13）In, it is characterised in that：Heater（8）Output enter take off benzene
Tower（10）Top makes benzene vapor uplink, the oily downlink containing benzene；The hot steam and debenzolizing tower that the external world comes（10）Include the washing oil of benzene
Enter regenerator together（9）Again from debenzolizing tower after parsing（10）Lower part enters so that entering debenzolizing tower containing benzene vapor after parsing
（10）Top, the debenzolizing tower（10）Top passes through the vacuum pump（12）Carrying out Negative pressure reduces tower top distillation boiling point.
2. low energy consumption local decompression takes off benzene device according to claim 1, it is characterised in that：The debenzolizing tower（10）Bottom is logical
It crosses reflux line and the washing oil after being detached with benzene is returned into the oil-poor slot（5）Middle recycling.
3. low energy consumption local decompression according to claim 1 or claim 2 takes off benzene device, it is characterised in that：On the reflux line also
The oily oil heat exchanger of connection（7）, the oil oil heat exchanger（7）To entering the heater（8）Gas-liquid mixture containing benzene before into
Row heating heats.
4. taking off benzene device according to any one of the claim 1-3 low energy consumption local decompressions, it is characterised in that：Close to institute
State oil-poor slot（5）It is additionally provided with oil-poor cooler on the reflux line at end（6）.
5. taking off benzene device according to any one of the claim 1-4 low energy consumption local decompressions, it is characterised in that：The separation
Device（14）The fixed gas also isolated is washed, removes gas main after separation.
6. a kind of low energy consumption local decompression takes off the de- benzene method of benzene device, include the following steps：
Step 1 washes benzene column（1）The gas-liquid mixture containing benzene of output enters rich oil slot（3）In, oil-poor slot（5）In washing oil pass through
Oil-poor pump（4）Also enter rich oil slot（3）In be mixed with, rich oil slot（3）In final mixture pumped by rich oil（2）It is delivered to
Heater（8）；
Step 2, the heater（8）The final mixture is heated to 180 DEG C of temperatures above；
Step 3, the heater（8）Output enter debenzolizing tower（10）Top makes benzene vapor uplink, the oily downlink containing benzene；
The hot steam and debenzolizing tower that the external world comes（10）The washing oil for including benzene enters regenerator together（9）Again from debenzolizing tower after parsing（10）Under
Portion enters so that entering debenzolizing tower containing benzene vapor after parsing（10）Top；
Step 4, the debenzolizing tower（10）What top came out enters fixed gas cooler containing benzene vapour（11）After enter back into vacuum pump
（12）, through vacuum pump（12）After extraction, make debenzolizing tower（10）Top is partially formed vacuum, and enhancing distilling effect reduces debenzolizing tower
（10）Temperature；
Step 5, vacuum pump（12）The fixed gas of output is through separator（14）It realizes gas-liquid separation, it is thick to isolate the deposit of product crude benzol
Benzene tank（13）In.
7. low energy consumption local decompression takes off the de- benzene method of benzene device according to claim 6, it is characterised in that：It is taken off in step 3
Benzene column（10）Washing oil after being detached with benzene is returned to the oil-poor slot by bottom by reflux line（5）Middle recycling.
8. low energy consumption local decompression takes off the de- benzene method of benzene device according to claim 7, it is characterised in that：The return duct
Oily oil heat exchanger is also connected on road（7）, the oil oil heat exchanger（7）To entering the heater（8）Gas-liquid containing benzene before is mixed
Conjunction object carries out heating and heats.
9. low energy consumption local decompression described according to claim 6 or 7 takes off the de- benzene method of benzene device, it is characterised in that：Close
The oil-poor slot（5）It is additionally provided with oil-poor cooler on the reflux line at end（6）.
10. taking off the de- benzene method of benzene device according to any one of the claim 6-9 low energy consumption local decompressions, feature exists
In：Separator described in step 5（14）The fixed gas isolated is washed, removes gas main after separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345236.7A CN108380005A (en) | 2018-04-17 | 2018-04-17 | A kind of de- benzene device of low energy consumption local decompression and its de- benzene method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345236.7A CN108380005A (en) | 2018-04-17 | 2018-04-17 | A kind of de- benzene device of low energy consumption local decompression and its de- benzene method |
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| CN108380005A true CN108380005A (en) | 2018-08-10 |
Family
ID=63064961
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| CN201810345236.7A Pending CN108380005A (en) | 2018-04-17 | 2018-04-17 | A kind of de- benzene device of low energy consumption local decompression and its de- benzene method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB568593A (en) * | 1940-09-12 | 1945-04-12 | Foster Wheeler Ltd | Improvements in the recovery of benzene from gases by absorption in wash oils |
| JPH01198687A (en) * | 1987-10-15 | 1989-08-10 | Kawasaki Heavy Ind Ltd | Recovering method of gas oil and naphthalene in coke oven gas |
| CN104312638A (en) * | 2014-10-30 | 2015-01-28 | 济南冶金化工设备有限公司 | Thermal coupling negative pressure debenzolizing and regenerating integrated device |
| CN204162673U (en) * | 2014-10-30 | 2015-02-18 | 济南冶金化工设备有限公司 | Thermal coupling negative pressure benzene removal, regeneration integrated apparatus |
| CN104403704A (en) * | 2014-11-21 | 2015-03-11 | 中冶焦耐工程技术有限公司 | Negative-pressure crude benzene distillation process and equipment heating washing oil by steam |
| CN104789273A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | System for recycling coke oven raw-gas benzene substances by using raw-gas waste heat |
| CN105154144A (en) * | 2015-08-31 | 2015-12-16 | 山东铁雄新沙能源有限公司 | Negative-pressure debenzylation device and negative-pressure debenzolization method |
| CN107628923A (en) * | 2017-09-29 | 2018-01-26 | 王书虎 | A kind of negative pressure benzene removal system and method for rich oil half |
| CN208526214U (en) * | 2018-04-17 | 2019-02-22 | 沂州科技有限公司 | A kind of de- benzene device of low energy consumption local decompression |
-
2018
- 2018-04-17 CN CN201810345236.7A patent/CN108380005A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB568593A (en) * | 1940-09-12 | 1945-04-12 | Foster Wheeler Ltd | Improvements in the recovery of benzene from gases by absorption in wash oils |
| JPH01198687A (en) * | 1987-10-15 | 1989-08-10 | Kawasaki Heavy Ind Ltd | Recovering method of gas oil and naphthalene in coke oven gas |
| CN104312638A (en) * | 2014-10-30 | 2015-01-28 | 济南冶金化工设备有限公司 | Thermal coupling negative pressure debenzolizing and regenerating integrated device |
| CN204162673U (en) * | 2014-10-30 | 2015-02-18 | 济南冶金化工设备有限公司 | Thermal coupling negative pressure benzene removal, regeneration integrated apparatus |
| CN104403704A (en) * | 2014-11-21 | 2015-03-11 | 中冶焦耐工程技术有限公司 | Negative-pressure crude benzene distillation process and equipment heating washing oil by steam |
| CN104789273A (en) * | 2015-03-27 | 2015-07-22 | 山东钢铁股份有限公司 | System for recycling coke oven raw-gas benzene substances by using raw-gas waste heat |
| CN105154144A (en) * | 2015-08-31 | 2015-12-16 | 山东铁雄新沙能源有限公司 | Negative-pressure debenzylation device and negative-pressure debenzolization method |
| CN107628923A (en) * | 2017-09-29 | 2018-01-26 | 王书虎 | A kind of negative pressure benzene removal system and method for rich oil half |
| CN208526214U (en) * | 2018-04-17 | 2019-02-22 | 沂州科技有限公司 | A kind of de- benzene device of low energy consumption local decompression |
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