CN111153762B - Benzene hydrogenation energy-saving efficiency improving device and application method thereof - Google Patents
Benzene hydrogenation energy-saving efficiency improving device and application method thereof Download PDFInfo
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- CN111153762B CN111153762B CN202010074702.XA CN202010074702A CN111153762B CN 111153762 B CN111153762 B CN 111153762B CN 202010074702 A CN202010074702 A CN 202010074702A CN 111153762 B CN111153762 B CN 111153762B
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 243
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 27
- 238000004064 recycling Methods 0.000 claims description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000895 extractive distillation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/163—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by hydrogenation
-
- 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
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- 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
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a benzene hydrogenation energy-saving efficiency-improving device, which comprises a stabilizer, a condenser, a reboiler, a stripping tower, a centralized controller for controlling the stabilizer, the condenser, the reboiler and the stripping tower, wherein the stabilizer, the condenser, the reboiler and the centralized controller are sequentially connected through pipelines, the pipelines between the condenser and the reboiler are arranged as thermosiphons, the output end of the stripping tower is respectively provided with a magnetic pump and a tangential flow pump, the output end of the magnetic pump is respectively connected with the pipelines at the input ends of the stripping tower and the thermosiphons, and the output end of the tangential flow pump is provided with a heavy benzene recovery barrel connected with the pipelines, and the invention has the beneficial effects that: the material at the bottom of the stable tower can directly adjust the feeding amount of the stripping tower through the automatic regulating valve, the feeding amount is stable, the feeding temperature is increased from about 25 ℃ to about 70 ℃, the heat loss is reduced, the heating steam amount of the stripping tower is also obviously reduced, the effect of larger energy saving and consumption reduction is achieved, the starting efficiency of the benzene hydrogenation device is improved, and the method is simple, convenient and easy to operate, has small investment and huge economic benefit.
Description
Technical Field
The invention belongs to the technical field of chemical mechanical equipment, and particularly relates to a benzene hydrogenation energy-saving efficiency improving device.
Background
The benzene hydrogenation device takes crude benzene as raw material, and produces products such as benzene, toluene, xylene and the like by removing unsaturated substances, sulfur-containing, nitrogen-containing, non-aromatic hydrocarbon compounds and other magazines through hydrofining and extractive distillation.
In the benzene hydrogenation process, crude benzene is lightly and heavily separated through a prefractionator, the prefractionator bottom material adopts a forced circulation mode of a magnetic pump, so that the forced circulation of the prefractionator is insufficient, crude benzene liquid impurities are more, naphthalene and other substances in the crude benzene are slowly crystallized at the beginning of driving due to lower temperature of the prefractionator, a filter screen needs to be cleaned repeatedly, the driving is troublesome, the driving time is greatly prolonged, high-temperature heavy benzene volatilized when the filter screen is cleaned, the high-temperature heavy benzene has stronger pungent smell, the damage to a human body is larger, and the temperature change of the crude benzene is overlarge in the feeding process, so that the waste of heat energy is caused.
Disclosure of Invention
The invention aims to provide a benzene hydrogenation energy-saving effect-improving device for avoiding serious waste of crude benzene feeding heat waves.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention discloses a benzene hydrogenation energy-saving efficiency-improving device which comprises a stabilizer, a condenser, a reboiler, a stripping tower, a centralized controller for controlling the stabilizer, the condenser, the reboiler and the stripping tower, wherein the stabilizer, the condenser, the reboiler and the centralized controller are sequentially connected through pipelines, the pipelines between the condenser and the reboiler are arranged as thermosiphons, the output end of the stripping tower is respectively provided with a magnetic pump and a tangential flow pump, the output end of the magnetic pump is respectively connected with the pipelines at the input ends of the stripping tower and the thermosiphons, and the output end of the tangential flow pump is provided with a heavy benzene recovery barrel connected with the pipelines.
The invention discloses an energy-saving benzene hydrogenation efficiency improving device, wherein the output end of a stabilizing tower is provided with a circulating hydrogen washing pump, and the output end of the circulating hydrogen washing pump is connected with the input end of a condenser through a pipeline.
The invention discloses a benzene hydrogenation energy-saving efficiency improving device, wherein a first three-way connecting piece is arranged on one side of a thermosiphon, which is close to a condenser, an automatic regulating valve which is electrically connected with a centralized controller is arranged on one side of the thermosiphon, which is close to a reboiler, and the output end of the first three-way connecting piece is connected with the input end pipeline of the automatic regulating valve.
The invention discloses a benzene hydrogenation energy-saving effect-improving device, wherein a stripper feeding pump electrically connected with a centralized controller is arranged between a reboiler and a stripper, the input end of the stripper feeding pump is connected with an output end pipeline of the reboiler, and the output end of the stripper feeding pump is connected with an input end pipeline of the stripper.
The invention discloses a benzene hydrogenation energy-saving efficiency improving device, wherein the output end of a stripping tower is provided with a first valve, the input end of the first valve is connected with a pipeline of the first valve, the output end of the first valve is provided with a second three-way connecting piece, the input end of the second three-way connecting piece is connected with the pipeline of the first valve, the output end of the second three-way connecting piece is respectively provided with a second valve and a third valve, and the first valve, the second valve and the third valve are respectively and electrically connected with a centralized controller.
The invention discloses a benzene hydrogenation energy-saving efficiency improving device, wherein the output end of a second valve is connected with the input end pipeline of a magnetic pump, the output end of the magnetic pump is respectively provided with a fourth valve and a fifth valve, the input end of the fourth valve is connected with the input end pipeline of a stripping tower, the pipeline connected with the output end of the fifth valve is integrated with a thermosiphon through a first three-way connector, and the fourth valve and the fifth valve are respectively and electrically connected with a centralized controller.
The invention discloses a benzene hydrogenation energy-saving efficiency improving device, wherein the output end of a third valve is connected with the input end pipeline of a tangential flow pump, a fourth tee joint is arranged on a pipeline between the third valve and the tangential flow pump, the fourth tee joint is connected with a third tee joint pipeline arranged on a pipeline between a magnetic pump and a first tee joint, a sixth valve electrically connected with a centralized controller is arranged on a pipeline between the third tee joint and the fourth tee joint, the input end of the sixth valve is connected with the output end pipeline of the fourth tee joint, and the output end is integrated into a pipeline between the magnetic pump and a thermosiphon through the third tee joint.
The invention discloses a benzene hydrogenation energy-saving effect-improving device, wherein a seventh valve electrically connected with a centralized controller is arranged between a tangential flow pump and a crude benzene recycling bin, the input end of the seventh valve is connected with an output end pipeline of the tangential flow pump, and the output end of the seventh valve is connected with an input end pipeline of the crude benzene recycling bin.
The invention discloses a using method of a benzene hydrogenation energy-saving effect-improving device, which comprises the following steps:
s1, controlling crude benzene to enter a condenser through a pipeline through the output end of a stabilizing tower for condensation by a centralized controller, entering a reboiler through a thermosiphon connected with the output end of the condenser, and then conveying the crude benzene to a stripping tower by a feeding pump of the stripping tower, wherein the centralized controller controls the opening of an automatic regulating valve arranged in the middle of the thermosiphon according to the crude benzene flow;
s2, after the benzene liquid discharged from the output end of the stripping tower passes through the first valve, the benzene liquid is split through the second tee joint and then is respectively conveyed to the input end of the magnetic pump and the input end of the tangential flow pump through the second valve and the third valve, the magnetic pump conveys a part of the stripped benzene liquid to the stripping tower through the fourth valve to strip again, the other part of the stripped benzene liquid flows through the fifth valve and then is merged into the thermosiphon through the third tee joint and the first tee joint in sequence to enter the reboiler again, the benzene liquid flowing to the tangential flow pump is conveyed to the heavy benzene recovery barrel through the tangential flow pump, and the centralized controller respectively controls the opening of the second valve, the third valve, the fourth valve and the fifth valve according to the benzene liquid flow.
S3, a fourth tee joint piece arranged between the third valve and the tangential flow pump divides the benzene liquid flowing out from the output end of the third valve, the divided benzene liquid flows through a sixth valve and then sequentially passes through the third tee joint piece and the first tee joint piece to be merged into the thermosiphon to enter the reboiler again, and the centralized controller controls the opening of the sixth valve according to the benzene liquid flow.
According to the technical scheme disclosed by the invention, the stabilizing tower, the condenser, the reboiler and the stripping tower are sequentially connected through the pipelines, the pipeline between the condenser and the reboiler is arranged as the thermosiphon, the output end of the stripping tower is respectively provided with the magnetic pump and the tangential flow pump, the output end of the magnetic pump is respectively connected with the pipeline of the stripping tower and the input end of the thermosiphon, the output end of the tangential flow pump is provided with the heavy benzene recycling bin connected with the pipeline, the feeding amount of the stripping tower can be directly regulated by the stabilizing tower bottom material through the automatic regulating valve, the feeding amount is stable, the feeding temperature is increased to about 70 ℃ from about 25 ℃ before, the heat loss is reduced, the heating steam amount of the stripping tower is obviously reduced, the effects of larger energy conservation and consumption reduction are achieved, the starting efficiency of the hydrogenation device is improved, the operation is simple and feasible, the investment is small, and the economic benefit is huge.
Drawings
The contents expressed in the drawings of the present specification and the marks in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of a benzene hydrogenation energy-saving and efficiency-improving device;
the labels in the above figures are: 1. a stabilizer; 2. a recycle hydrogen wash pump; 3. a condenser; 4. a first tee; 5. a thermosiphon; 6. an automatic regulating valve; 7. a reboiler; 8. a stripper feed pump; 9. a stripping column; 10. a first valve; 11. a second tee; 12. a second valve; 13. a magnetic pump; 14. a fourth valve; 15. a fifth valve; 16. a third tee; 17. a third valve; 18. a fourth tee; 19. a sixth valve; 20. a tangential flow pump; 21. a seventh valve; 22. heavy benzene recycling bin.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic structural diagram of a benzene hydrogenation energy-saving and efficiency-improving device according to the present invention, as shown in the figure:
the invention discloses a benzene hydrogenation energy-saving efficiency-improving device, which comprises a stabilizer 1, a condenser 3, a reboiler 7, a stripping tower 9, a centralized controller 23 for controlling the stabilizer 1, the condenser 3, the reboiler 7 and the stripping tower 9, wherein the stabilizer is sequentially connected through pipelines, the pipeline between the condenser 3 and the reboiler 7 is set as a thermosiphon 5, the output end of the stripping tower 9 is respectively provided with a magnetic pump 13 and a tangential flow pump 22, the output end of the magnetic pump 13 is respectively connected with the pipeline of the stripping tower 9 and the pipeline of the input end of the thermosiphon 5, and the output end of the tangential flow pump 22 is provided with a heavy benzene recovery barrel 22 connected with the pipeline.
The output end of the stabilizer 1 is provided with a circulating hydrogen washing pump 2, and the output end of the circulating hydrogen washing pump 2 is connected with the input end of the condenser 3 through a pipeline.
The thermosiphon 5 is provided with a first three-way connector 4 at one side close to the condenser 3, an automatic regulating valve 6 electrically connected with a centralized controller 23 is provided at one side close to the reboiler 7, and the output end of the first three-way connector 4 is connected with the input end of the automatic regulating valve 6 through a pipeline.
A stripper feeding pump 8 electrically connected with a centralized controller 23 is arranged between the reboiler 7 and the stripper 9, the input end of the stripper feeding pump 8 is connected with the output end pipeline of the reboiler 7, and the output end is connected with the input end pipeline of the stripper 9.
The output end of the stripping tower 9 is provided with a first valve 10 with an input end connected with a pipeline of the first valve 10, the output end of the first valve 10 is provided with a second three-way connector 11 with an input end connected with the pipeline of the first valve, and the output end of the second three-way connector 11 is respectively provided with a second valve 12 and a third valve 17, wherein the first valve 10, the second valve 12 and the third valve 17 are respectively electrically connected with the centralized controller 23.
The output end of the second valve 12 is connected with the input end of the magnetic pump 13 through a pipeline, the output end of the magnetic pump 13 is respectively provided with a fourth valve 14 and a fifth valve 15, the input end of the fourth valve 14 is connected with the input end of the stripping tower 9 through a pipeline, the pipeline connected with the output end of the fifth valve 15 is integrated into the thermosiphon 5 through the first three-way connector 4, and the fourth valve 14 and the fifth valve 15 are respectively and electrically connected with the centralized controller 25.
The output end of the third valve 17 is connected with the input end of the tangential flow pump 20 in a pipeline manner, a fourth three-way joint 18 is arranged in the pipeline between the third valve 17 and the tangential flow pump 20, the fourth three-way joint 18 is connected with a third three-way joint 16 arranged in the pipeline between the magnetic pump 13 and the first three-way joint 4 in a pipeline manner, a sixth valve 19 is arranged in the pipeline between the third three-way joint 16 and the fourth three-way joint 18 and is electrically connected with the centralized controller 23, the input end of the sixth valve 19 is connected with the output end of the fourth three-way joint 18 in a pipeline manner, and the output end of the sixth valve is integrated into the pipeline between the magnetic pump 13 and the thermosiphon 5 through the third three-way joint 16.
A seventh valve 21 electrically connected with a centralized controller 23 is arranged between the tangential flow pump 20 and the crude benzene recycling bin 22, the input end of the seventh valve 21 is connected with the output end of the tangential flow pump 20 through a pipeline, and the output end of the seventh valve is connected with the input end of the crude benzene recycling bin 22 through a pipeline.
The centralized controller 23 controls crude benzene to enter the condenser 3 through a pipeline for condensation through the output end of the stabilizer 1, enters the reboiler 7 through the thermosiphon 5 connected with the output end of the condenser 3, and is conveyed to the stripping tower 9 through the stripping tower feed pump 8, and the centralized controller 23 controls the opening of the automatic regulating valve 6 arranged in the middle of the thermosiphon 5 according to the crude benzene flow;
after flowing through the first valve 10, the benzene liquid discharged from the output end of the stripping tower 9 is split by the second three-way connector 11 and then is respectively conveyed to the input end of the magnetic pump 13 and the input end of the tangential flow pump 20 by the second valve 12 and the third valve 17, the magnetic pump 13 conveys one part of the stripped benzene liquid to the stripping tower 9 by the fourth valve 14 for stripping again, the other part of the stripped benzene liquid flows through the fifth valve 15 and then sequentially passes through the third three-way connector 16 and the first three-way connector 4 to be merged into the thermosiphon 5 and then enters the reboiler 7 again, the benzene liquid flowing to the tangential flow pump 20 is conveyed to the heavy benzene recovery barrel 22 by the tangential flow pump 20, and the centralized controller 23 respectively controls the opening of the second valve 12, the third valve 17, the fourth valve 14 and the fifth valve 15 according to the benzene liquid flow.
The fourth three-way connector 18 arranged between the third valve 17 and the tangential flow pump 20 divides the benzene liquid flowing out from the output end of the third valve 17, the divided benzene liquid flows through the sixth valve 19 and then sequentially passes through the third three-way connector 16 and the first three-way connector 4 to be merged into the thermosiphon 5 to enter the reboiler 7 again, and the centralized controller 23 controls the opening of the sixth valve 19 according to the benzene liquid flow.
According to the technical scheme disclosed by the invention, the stabilizer 1, the condenser 3, the reboiler 7 and the stripper 9 are sequentially connected through the pipelines, the pipeline between the condenser 3 and the reboiler 7 is set as the thermosiphon 5, the output end of the stripper 9 is respectively provided with the magnetic pump 13 and the tangential flow pump 20, the output end of the magnetic pump 13 is respectively connected with the pipeline of the stripper 9 and the pipeline of the input end of the thermosiphon 5, the output end of the tangential flow pump 20 is provided with the heavy benzene recovery barrel 22 connected with the pipeline, the material of the stabilizer 1 can directly adjust the feeding amount of the stripper 9 through the automatic regulating valve 6, the feeding amount is stable, the feeding temperature is increased to about 70 ℃ from about 25 ℃, the heat loss is reduced, the heating steam amount of the stripper 9 is also obviously reduced, the effects of large energy conservation and consumption reduction are achieved, the starting efficiency of the hydrogenation device is improved, the hydrogenation device is simple, the operation is easy, the investment is small, and the economic benefit is great.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.
Claims (1)
1. The application method of the benzene hydrogenation energy-saving efficiency-improving device is characterized by using the following devices: the device comprises a stabilizer, a condenser, a reboiler, a stripping tower, a centralized controller for controlling the stabilizer, the condenser, the reboiler and the stripping tower, which are sequentially connected through pipelines, wherein the pipeline between the condenser and the reboiler is a thermosiphon, the output end of the stripping tower is respectively provided with a magnetic pump and a tangential flow pump, the output end of the magnetic pump is respectively connected with the pipeline of the input ends of the stripping tower and the thermosiphon, and the output end of the tangential flow pump is provided with a heavy benzene recycling bin connected with the pipeline; the output end of the stabilizing tower is provided with a circulating hydrogen washing pump, and the output end of the circulating hydrogen washing pump is connected with the input end of the condenser through a pipeline; the output end of the first tee joint is connected with the input end pipeline of the automatic regulating valve; a stripper feeding pump electrically connected with the centralized controller is arranged between the reboiler and the stripper, the input end of the stripper feeding pump is connected with the output end pipeline of the reboiler, and the output end is connected with the input end pipeline of the stripper; the output end of the stripping tower is provided with a first valve, the input end of the first valve is connected with a pipeline of the first valve, the output end of the first valve is provided with a second three-way connecting piece, the input end of the second three-way connecting piece is connected with the pipeline of the first valve, the output end of the second three-way connecting piece is respectively provided with a second valve and a third valve, and the first valve, the second valve and the third valve are respectively and electrically connected with the centralized controller; the output end of the second valve is connected with the input end pipeline of the magnetic pump, the output end of the magnetic pump is respectively provided with a fourth valve and a fifth valve, the input end of the fourth valve is connected with the input end pipeline of the stripping tower, the pipeline connected with the output end of the fifth valve is integrated into the thermosiphon through a first tee joint, and the fourth valve and the fifth valve are respectively and electrically connected with the centralized controller; the output end of the third valve is connected with the input end pipeline of the tangential flow pump, a fourth three-way connector is arranged on the pipeline between the third valve and the tangential flow pump, the fourth three-way connector is connected with the pipeline between the magnetic pump and the first three-way connector, a sixth valve electrically connected with the centralized controller is arranged on the pipeline between the third three-way connector and the fourth three-way connector, the input end of the sixth valve is connected with the output end pipeline of the fourth three-way connector, and the output end is integrated into the pipeline between the magnetic pump and the thermosiphon through the third three-way connector; a seventh valve electrically connected with the centralized controller is arranged between the tangential flow pump and the crude benzene recycling bin, the input end of the seventh valve is connected with the output end pipeline of the tangential flow pump, and the output end of the seventh valve is connected with the input end pipeline of the crude benzene recycling bin; the method for using the benzene hydrogenation energy-saving efficiency-improving device comprises the following steps:
s1, controlling crude benzene to enter a condenser through a pipeline through the output end of a stabilizing tower for condensation by a centralized controller, entering a reboiler through a thermosiphon connected with the output end of the condenser, and then conveying the crude benzene to a stripping tower by a feeding pump of the stripping tower, wherein the centralized controller controls the opening of an automatic regulating valve arranged in the middle of the thermosiphon according to the crude benzene flow;
s2, after the benzene liquid discharged from the output end of the stripping tower passes through a first valve, the benzene liquid is split through a second tee joint and then is respectively conveyed to the input end of a magnetic pump and the input end of a tangential flow pump through a second valve and a third valve, the magnetic pump conveys one part of the stripped benzene liquid to the stripping tower through a fourth valve to strip again, the other part of the stripped benzene liquid flows through a fifth valve and then is combined with a thermosiphon through the third tee joint and the first tee joint to enter a reboiler again, the benzene liquid flowing to the tangential flow pump is conveyed to a heavy benzene recovery barrel through the tangential flow pump, and the central controller respectively controls the opening of the second valve, the third valve, the fourth valve and the fifth valve according to the benzene liquid flow;
s3, a fourth tee joint piece arranged between the third valve and the tangential flow pump divides the benzene liquid flowing out from the output end of the third valve, the divided benzene liquid flows through a sixth valve and then sequentially passes through the third tee joint piece and the first tee joint piece to be merged into the thermosiphon to enter the reboiler again, and the centralized controller controls the opening of the sixth valve according to the benzene liquid flow.
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| CN202010074702.XA CN111153762B (en) | 2020-01-22 | 2020-01-22 | Benzene hydrogenation energy-saving efficiency improving device and application method thereof |
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| CN202010074702.XA CN111153762B (en) | 2020-01-22 | 2020-01-22 | Benzene hydrogenation energy-saving efficiency improving device and application method thereof |
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| CN207047126U (en) * | 2017-06-01 | 2018-02-27 | 临涣焦化股份有限公司 | Crude benzene refining low temperature hydrogenation device |
| CN109019725A (en) * | 2017-06-08 | 2018-12-18 | 湖北三宁化工股份有限公司 | A kind of energy conservation water vaporization tower |
| CN209974661U (en) * | 2019-05-22 | 2020-01-21 | 邢台旭阳煤化工有限公司 | Waste heat recovery device and coking crude benzene hydrogenation system |
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