CN110776962A - Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe - Google Patents
Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe Download PDFInfo
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- CN110776962A CN110776962A CN201910961241.5A CN201910961241A CN110776962A CN 110776962 A CN110776962 A CN 110776962A CN 201910961241 A CN201910961241 A CN 201910961241A CN 110776962 A CN110776962 A CN 110776962A
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- oil
- rich oil
- rich
- lean
- coke oven
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 239000000571 coke Substances 0.000 title claims abstract description 47
- 238000010438 heat treatment Methods 0.000 title claims abstract description 35
- 230000001174 ascending effect Effects 0.000 title claims abstract description 32
- 239000002918 waste heat Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000004821 distillation Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 16
- 230000008929 regeneration Effects 0.000 claims description 15
- 238000011069 regeneration method Methods 0.000 claims description 15
- 230000001172 regenerating effect Effects 0.000 claims 1
- 239000003034 coal gas Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
-
- 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
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
- C10K1/18—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids hydrocarbon oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
-
- 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
-
- 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
-
- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a device for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, which comprises a rich oil processor, a rich oil regenerator, a lean oil processor, a rich oil pipeline and a rich oil pump, wherein the rich oil processor, the rich oil regenerator and the lean oil processor are sequentially connected through oil pipes and are used for carrying out heat exchange distillation on rich oil; the invention also discloses a method for heating the rich oil and removing benzene by using the waste heat of the coke oven ascending pipe, which heats the rich oil by using the coke oven ascending pipe, overcomes the defect that a large amount of steam and coal gas are consumed in the using process of the traditional tubular furnace and medium-pressure steam, and achieves the purposes of saving energy, reducing consumption and reducing the temperature of raw gas; the heating of the rich oil by the coke oven ascending pipe does not use the traditional tubular furnace, thereby avoiding the accident of atmospheric pollution caused by incomplete combustion of coal gas and realizing environment-friendly production.
Description
Technical Field
The invention belongs to the field of coal coking industry equipment, and particularly relates to a device and a method for heating rich oil and removing benzene by using waste heat of a coke oven riser.
Background
At present, the benzene removal process of heating rich oil by a tubular furnace or heating rich oil by medium-pressure steam is adopted in most of the benzene removal processes of the coking plants in China, when the traditional process of heating the rich oil and removing the benzene by the tubular furnace is adopted, a large amount of coal gas can be wasted due to the fact that the tubular furnace uses the coal gas as a heating source, and meanwhile, due to incomplete combustion of the coal gas in the combustion process, a large amount of harmful substances such as sulfur dioxide, nitric oxide and the like are contained in discharged waste gas, so that the risk of air pollution is caused. When the medium-pressure steam is adopted to heat the rich oil, because a large amount of medium-pressure steam is needed to be used for heating and distilling the rich oil, a large amount of medium-pressure steam is consumed in production, and thus energy waste is caused. With the development of times, energy-saving, consumption-reducing and environment-friendly production become mainstream of the development of the currently introduced enterprises, so that the traditional tube furnace heating rich oil debenzolization process or the medium-pressure steam heating rich oil debenzolization process is gradually replaced by a novel energy-saving and environment-friendly debenzolization process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel environment-friendly device and a method for heating a rich oil debenzolization process by waste heat of an ascending pipe of a coke oven with a rich oil heating mode.
In order to achieve the purpose, the invention adopts the technical scheme that: a device for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe comprises a rich oil processor for carrying out heat exchange distillation on the rich oil, a rich oil regenerator, a lean oil processor for carrying out heat exchange cooling benzene washing on the lean oil, a rich oil pipeline after heat exchange and a rich oil pump.
The invention discloses a device for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, wherein an oil-rich processor comprises a coke oven ascending pipe for waste heat exchange, a rich oil pipeline and a benzene removal tower; the outlet of the coke oven ascending pipe is connected with the inlet of the rich oil pipeline, the first rich oil pipeline is connected with the inlet at the bottom of the regenerator, and the second rich oil pipeline is connected with the rich oil inlet of the debenzolization tower.
The invention discloses a device for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, wherein an oil-rich regenerator comprises a rich oil regeneration part and a medium-pressure steam pipeline, wherein the rich oil regeneration part is used for washing a small amount of rich oil; the oil-gas outlet of the rich oil regeneration part is connected with the oil-gas inlet of the debenzolization tower, and the bottom of the rich oil regeneration part is introduced into a medium-pressure steam pipeline.
The invention discloses a device for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, wherein a lean oil processor comprises a lean and rich oil heat exchanging part, a lean oil cooling part and a benzene washing tower; a lean oil inlet of the lean and rich oil heat exchange part is connected with a lean oil outlet of the debenzolization tower, a lean oil outlet is connected with an inlet of the lean oil cooling part, a rich oil inlet of the lean and rich oil heat exchange part is connected with a rich oil outlet of the benzene washing tower, and a rich oil outlet is connected with a rich oil inlet of a coke oven ascending pipe; an outlet of the lean oil cooling part is connected with a lean oil inlet of the benzene washing tower; the rich oil outlet of the benzene washing tower is connected with the inlet of the rich oil pump.
The invention discloses a method for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, which comprises the following steps of:
s1: sending rich oil sent out from a benzene washing section into a coke oven riser after heat exchange for secondary heat exchange, and then sending the rich oil into a debenzolization tower for distillation after heat exchange;
s2: introducing a small amount of rich oil into an oil washing regenerator for regeneration, and introducing medium-pressure steam from the bottom of the regenerator for steam stripping;
s3: oil gas is discharged from the top of the regenerator and then enters the bottom of the debenzolization tower to distill the heated rich oil, the rich oil entering the debenzolization tower is changed into lean oil after being distilled and is subjected to heat exchange through a lean and rich oil heat exchange part, then the rich oil enters a coke oven riser through a rich oil pipeline after heat exchange, and the lean oil is cooled by a lean oil cooling part and then continuously returns to a benzene washing tower for benzene washing:
the invention discloses a method for heating rich oil and removing benzene by using waste heat of a coke oven ascending pipe, which comprises the step S1, wherein the heat exchange temperature of the rich oil in the coke oven ascending pipe is 190 ℃ to 170-.
The invention discloses a method for heating rich oil and removing benzene by using waste heat of a coke oven riser, which comprises the step S2, wherein the content of the rich oil introduced into an oil-rich regenerator is 1.5-3%.
By adopting the technical scheme, firstly, energy is saved, consumption is reduced, the oil-rich gas is heated by the coke oven riser, a large amount of steam and gas can be saved without using medium-pressure steam or a traditional tubular furnace, meanwhile, the high-temperature raw gas in the coke oven riser is fully subjected to heat exchange with the oil-rich gas, and the purpose of reducing the temperature of the raw gas is realized; secondly, the environment is protected, the oil is heated by utilizing the ascending pipe of the coke oven without using the traditional tubular furnace, the air pollution accident caused by incomplete combustion of coal gas is fundamentally avoided, and the environment-friendly production is realized; thirdly, the heat exchange efficiency is high, no redundant waste water is generated, the heating speed and the quick change of the heat efficiency of the ascending tube of the coke oven for heating the rich oil are high, and in addition, no much waste water and waste gas are generated in the whole debenzolization process.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic view of the present invention;
labeled as: 1. a coke oven riser; 2. a rich oil line; 3. a debenzolization tower; 4. an oil-rich regeneration section; 5. a medium pressure steam line; 6. a lean rich oil heat exchange part; 7. a lean oil cooling section; 8. a benzene washing tower; 9. an oil-rich pump; 10. a post heat exchange rich oil line;
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.
FIG. 1 is a schematic diagram of an apparatus for heating rich oil and removing benzene by using waste heat of a coke oven riser, and the apparatus for heating rich oil and removing benzene by using waste heat of the coke oven riser shown in FIG. 1 comprises a rich oil processor for performing heat exchange distillation on rich oil, a rich oil regenerator, a lean oil processor for performing heat exchange cooling benzene washing on lean oil, a rich oil pipeline 9 after heat exchange and a rich oil pump 10; the rich oil processor comprises a coke oven ascending pipe 1 for waste heat exchange, a rich oil pipeline 2 and a debenzolization tower 3; the rich oil regenerator comprises a rich oil regeneration part 4 for a small amount of rich wash oil and a medium pressure steam pipeline 5; the lean oil processor comprises a lean-rich oil heat exchange part 6, a lean oil cooling part 7 and a benzene washing tower 8;
when the device works, rich oil sent out from the final cooling benzene washing section is subjected to heat exchange and then sent into the ascending pipe 1 of the waste heat exchange coke oven for secondary heat exchange, and the rich oil enters the debenzolization tower 3 for distillation after the heat exchange is carried out to the temperature of 170-180 ℃; meanwhile, a small amount of 1.5-3% of rich oil is introduced into a rich oil regeneration part 4 for regeneration, a medium-pressure steam pipeline 5 is introduced from the bottom of the rich oil regeneration part 4 for steam stripping, oil steam is discharged from the top of the rich oil regeneration part 4 and then enters the bottom of a debenzolization tower 3 for distilling the heated rich oil, the rich oil entering the debenzolization tower 3 is distilled to become lean oil, a part of the rich oil enters a heat-exchanged rich oil pipeline 9 after the heat exchange of the lean oil and the rich oil is carried out by a lean oil heat exchange part 6, and the other part of the lean oil enters a lean oil cooling part 7 for cooling and then continuously returns to a benzene washing tower 8 for benzene washing.
By adopting the technical scheme, firstly, energy is saved, consumption is reduced, the oil-rich gas is heated by the coke oven riser, a large amount of steam and gas can be saved without using medium-pressure steam or a traditional tubular furnace, meanwhile, the high-temperature raw gas in the coke oven riser is fully subjected to heat exchange with the oil-rich gas, and the purpose of reducing the temperature of the raw gas is realized; secondly, the environment is protected, the oil is heated by utilizing the ascending pipe of the coke oven without using the traditional tubular furnace, the air pollution accident caused by incomplete combustion of coal gas is fundamentally avoided, and the environment-friendly production is realized; thirdly, the heat exchange efficiency is high, no redundant waste water is generated, the heating speed and the quick change of the heat efficiency of the ascending tube of the coke oven for heating the rich oil are high, and in addition, no much waste water and waste gas are generated in the whole debenzolization process.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (7)
1. The device for heating the rich oil and removing benzene by using the waste heat of the coke oven ascending pipe is characterized by comprising a rich oil processor for carrying out heat exchange distillation on the rich oil, an oil-rich regenerator for regenerating a small amount of rich oil, a lean oil processor for carrying out heat exchange cooling benzene washing on the lean oil, a rich oil pipeline after heat exchange and an oil-rich pump, wherein the rich oil processor is sequentially connected through an oil pipe.
2. The device for heating the rich oil and removing the benzene by using the waste heat of the coke oven ascending pipe according to claim 1, wherein the rich oil processor comprises the coke oven ascending pipe for waste heat exchange, a rich oil pipeline and a benzene removing tower; the outlet of the coke oven ascending pipe is connected with the inlet of the rich oil pipeline, the first rich oil pipeline is connected with the inlet at the bottom of the regenerator, and the second rich oil pipeline is connected with the rich oil inlet of the debenzolization tower.
3. The device for heating the rich oil and removing benzene by using the waste heat of the ascending pipe of the coke oven as claimed in claim 1, wherein the rich oil regenerator comprises a rich oil regeneration part for a small amount of rich wash oil and a medium-pressure steam line; the oil-gas outlet of the rich oil regeneration part is connected with the oil-gas inlet of the debenzolization tower, and the bottom of the rich oil regeneration part is introduced into a medium-pressure steam pipeline.
4. The device for heating rich oil and removing benzene by using the waste heat of the ascending pipe of the coke oven as claimed in claim 1, wherein the lean oil processor comprises a lean and rich oil heat exchanging part, a lean oil cooling part and a benzene washing tower; a lean oil inlet of the lean and rich oil heat exchange part is connected with a lean oil outlet of the debenzolization tower, a lean oil outlet is connected with an inlet of the lean oil cooling part, a rich oil inlet of the lean and rich oil heat exchange part is connected with a rich oil outlet of the benzene washing tower, and a rich oil outlet is connected with a rich oil inlet of a coke oven ascending pipe; an outlet of the lean oil cooling part is connected with a lean oil inlet of the benzene washing tower; the rich oil outlet of the benzene washing tower is connected with the inlet of the rich oil pump.
5. The method for heating the oil-rich debenzolization by using the residual heat of the ascending pipe of the coke oven as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
s1: sending rich oil sent out from a benzene washing section into a coke oven riser after heat exchange for secondary heat exchange, and then sending the rich oil into a debenzolization tower for distillation after heat exchange;
s2: introducing a small amount of rich oil into an oil washing regenerator for regeneration, and introducing medium-pressure steam from the bottom of the regenerator for steam stripping;
s3: oil gas is discharged from the top of the regenerator and then enters the bottom of the debenzolization tower to distill the heated rich oil, the rich oil entering the debenzolization tower is changed into lean oil after being distilled and is subjected to heat exchange through the lean and rich oil heat exchange part, then the rich oil enters the coke oven riser through the rich oil pipeline after the heat exchange, and the lean oil is cooled through the lean oil cooling part and then continuously returns to the benzene washing tower for benzene washing.
6. The method for heating the rich oil and the debenzolization by using the residual heat of the coke oven riser according to the claim 5, wherein the temperature for exchanging the heat of the rich oil in the coke oven riser is 170-190 ℃ in the step S1.
7. The method for heating the rich oil and the debenzolization by using the residual heat of the ascending pipe of the coke oven as claimed in claim 5, wherein the rich oil introduced into the rich oil regenerator in the step S2 is 1.5 to 3 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910961241.5A CN110776962A (en) | 2019-10-11 | 2019-10-11 | Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910961241.5A CN110776962A (en) | 2019-10-11 | 2019-10-11 | Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe |
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| CN110776962A true CN110776962A (en) | 2020-02-11 |
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| CN201910961241.5A Pending CN110776962A (en) | 2019-10-11 | 2019-10-11 | Device and method for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113444548A (en) * | 2021-07-13 | 2021-09-28 | 山东钢铁股份有限公司 | Rich oil debenzolization heating system utilizing coke oven crude gas heat |
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| KR20040033335A (en) * | 2002-10-14 | 2004-04-28 | 주식회사 포스코 | A method for controlling the viscosity of oil in btx recovery process |
| CN101597517A (en) * | 2009-06-17 | 2009-12-09 | 济钢集团国际工程技术有限公司 | A kind of rich oil de-benzene process |
| CN206385105U (en) * | 2017-01-05 | 2017-08-08 | 马龙县明龙焦化实业有限公司 | A kind of coke-stove gas efficiently elutes benzene series system |
| CN108424793A (en) * | 2018-05-17 | 2018-08-21 | 山东焦化技术咨询服务有限公司 | Rich oil de-benzene system and rich oil de-benzene method |
| CN109777448A (en) * | 2019-03-28 | 2019-05-21 | 陕西驭腾实业有限公司 | A kind of coke oven coke oven uprising tube raw coke oven gas waste heat is used to that tube furnace to be replaced to take off benzene device |
| CN211522135U (en) * | 2019-10-11 | 2020-09-18 | 临涣焦化股份有限公司 | Device for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe |
-
2019
- 2019-10-11 CN CN201910961241.5A patent/CN110776962A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040033335A (en) * | 2002-10-14 | 2004-04-28 | 주식회사 포스코 | A method for controlling the viscosity of oil in btx recovery process |
| CN101597517A (en) * | 2009-06-17 | 2009-12-09 | 济钢集团国际工程技术有限公司 | A kind of rich oil de-benzene process |
| CN206385105U (en) * | 2017-01-05 | 2017-08-08 | 马龙县明龙焦化实业有限公司 | A kind of coke-stove gas efficiently elutes benzene series system |
| CN108424793A (en) * | 2018-05-17 | 2018-08-21 | 山东焦化技术咨询服务有限公司 | Rich oil de-benzene system and rich oil de-benzene method |
| CN109777448A (en) * | 2019-03-28 | 2019-05-21 | 陕西驭腾实业有限公司 | A kind of coke oven coke oven uprising tube raw coke oven gas waste heat is used to that tube furnace to be replaced to take off benzene device |
| CN211522135U (en) * | 2019-10-11 | 2020-09-18 | 临涣焦化股份有限公司 | Device for heating rich oil and removing benzene by using waste heat of coke oven ascending pipe |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113444548A (en) * | 2021-07-13 | 2021-09-28 | 山东钢铁股份有限公司 | Rich oil debenzolization heating system utilizing coke oven crude gas heat |
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