CN100436570C - Hydrogenation method for making clean fuels - Google Patents
Hydrogenation method for making clean fuels Download PDFInfo
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- CN100436570C CN100436570C CNB2006101283287A CN200610128328A CN100436570C CN 100436570 C CN100436570 C CN 100436570C CN B2006101283287 A CNB2006101283287 A CN B2006101283287A CN 200610128328 A CN200610128328 A CN 200610128328A CN 100436570 C CN100436570 C CN 100436570C
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Abstract
The invention discloses a hydrogenating method to manufacture clean fuel, which is characterized by the following: adding catalyst bed on the heat low-pressure separator or hydrogenating refining reactor between heat low-pressure separator and cold low-pressure separator; cracking the hydrocarbon oil; manufacturing light-quality and clean fuel.
Description
Technical field
The invention belongs to the refining of petroleum field, relate to a kind of method of hydrotreating of producing clean fuel.
Background technology
Along with the reinforcement of environmental consciousness, production and use clean fuel have become big development trend.Owing to adopt hydrofinishing process to produce clean fuel, the product yield height is arranged, pollute little and do not produce the characteristics such as refuse that are difficult to handle, hydro-refining unit has become the important selection that refinery improves the quality of products.Chinese patent CN1552812A discloses a kind of diesel deep desulfurization, takes off fragrant technology.Adopt hydrofinishing process to produce clean fuel, owing to operate facing under hydrogen, the high temperature and high pressure, plant investment and process cost are higher, produce clean fuel to refinery and have brought expensively, have reduced economic benefit.
Hydroeracking unit is another important device of refinery, and the characteristics such as oily scope is wide, product structure flexible, good product quality, liquid yield height that process raw material with it become the key means of the production of balance refinery and the market requirement day by day.Separation method by the hydroeracking unit reaction effluent can be divided into the flow process of reactive moieties high pressure hot separator flow process (being called for short the thermoanalysis journey) and cold high pressure separator flow process (being called for short cold minute flow process) at present.The thermoanalysis journey, be that reaction product is usually in heat exchange to 250～300 during ℃ this higher temperature levels, enter high pressure hot separator and carry out gas, liquid separation, the high pressure hot separator gas phase enters cold high pressure separator and carries out gas, liquid separation, enter thermal low-pressure separators after the decompression of high pressure hot separator liquid phase and carry out the low-pressure gas-liquid separation, the thermal low-pressure separators gas phase is advanced the cold low separator and is separated once more, and the thermal low-pressure separators liquid phase directly enters the fractionation part under higher temperature condition.For cold minute flow process, the thermoanalysis journey has improved the device efficiency of utilization, can prevent from that condensed-nuclei aromatics from separating out at low-temperature section simultaneously to stop up interchanger and water cooler, therefore is widely adopted in the technological design of hydrocracking.
Yet along with the lasting upgrading of society, to produce the problem that the celebrated hydrogenation unit of oil product also begins to face quality product that cleans to cleaning oil product demand.On conventional hydroeracking unit, only the upgrading by catalyzer reaches the purpose that satisfies product requirement, change more and more difficult, and cost is also more and more higher.Therefore, the characteristic of how effectively to utilize the high temperature of hydrocracking own, high pressure, facing hydrogen further enlarges hydrogenation reaction and extends, and becomes developing direction of hydrogen addition technology progressive.
Chinese patent CN1476475A discloses a kind of method for hydrogen cracking, in the hydrocracking reaction district thermal high gas stripping column is set, thermal high gas stripping column lower end is provided with hydrogenation zone, draw high pressure hydrogen separately to hydrogenation zone, utilize this hydrogenation zone to come the hydrogenation and the contacted liquid hydrocarbon that flows downward of mobile hydrogen that makes progress, thereby be translated into more lower boiling hydro carbons.The characteristics of this method are: since through the hydrocarbon that flows downward of hydrogenation zone in the thermal high gas stripping column gas hydrogen sulfide and ammonia are proposed, so hydrogenation is carried out, help from hydrocarbon, removing the sulphur of relative low levels under the condition that is called the low-sulfur environment.This method requires the hydrocracking reaction effluent not cool off in advance at gas, the temperature that only allows to take place because of inevitable thermosteresis causes reduces, and the pressure that gas is carried also maintains and the essentially identical pressure of hydrocracking reaction, its essence is a kind of of main reaction replenished or extension, perhaps be interpreted as the back treating process of hydrocracking reaction.
Summary of the invention
The object of the present invention is to provide a kind of method of hydrotreating of producing clean fuel, utilize thermal low-pressure separators in the existing hydrocracking process high pressure hot separator flow process to have higher relatively temperature and pressure, possess these characteristics of the hydrogen of facing environment simultaneously, make with extra care this device product of hydrocracking and need make with extra care hydrocarbon ils, thereby utilize a covering device to reach the purpose of production lightweight and clean fuel products simultaneously from outer other of device.
A kind of technical scheme of the present invention's employing is for this reason: a kind of method of hydrotreating of producing clean fuel, it is characterized in that: the hydrocracking reaction product enters high pressure hot separator and carries out gas, liquid separation after heat exchange, the high pressure hot separator gas phase enters cold high pressure separator and carries out gas, liquid separation, the cold high pressure separator gas phase is a hydrogen-rich gas, after the desulfurization of desulphurization of recycle hydrogen system is handled, advancing compressor boosts, gas after boosting is mixed into new hydrogen as recycle hydrogen and mixes hydrogen, returns the hydrocracking reaction system; High pressure hot separator liquid phase decompression back separately or and need purified hydrocarbon ils component enter together that thermal low-pressure separators carries out low pressure gas, liquid separates, at thermal low-pressure separators top filling catalyst for refining bed, the thermal low-pressure separators gas phase is from bottom to top by being arranged on the catalyst for refining bed on thermal low-pressure separators top, desulfurization, denitrogenation take place, alkene, aromatic hydrocarbons saturated reaction, advance the cold low separator then and separate once more, the thermal low-pressure separators liquid phase is advanced fractionation and is partly isolated various products; The cold high pressure separator liquid phase also enters the cold low separator after decompression; Cold low separator gas phase is a hydrogen-rich gas, can advance the hydrogen recovery unit recover hydrogen or the pneumatic transmission that acts as a fuel goes out device, and the cold low separator liquid phase is advanced fractionation and partly isolated various products.
The another kind of technical scheme that the present invention adopts is: a kind of method of hydrotreating of producing clean fuel, it is characterized in that: the hydrocracking reaction product enters high pressure hot separator and carries out gas, liquid separation after heat exchange, enter cold high pressure separator then and carry out gas, liquid separation, the cold high pressure separator gas phase is a hydrogen-rich gas, after the desulfurization of desulphurization of recycle hydrogen system is handled, advance compressor and boost, the gas after boosting is mixed into new hydrogen as recycle hydrogen and mixes hydrogen, returns the hydrocracking reaction system; High pressure hot separator liquid phase decompression back separately or and need purified hydrocarbon ils component enter together that thermal low-pressure separators carries out low pressure gas, liquid separates, between thermal low-pressure separators and cold low separator, hydrofining reactor is set, the thermal low-pressure separators gas phase enter hydrofining reactor separately or with need purified hydrocarbon ils component together, desulfurization, denitrogenation take place, alkene, aromatic hydrocarbons saturated reaction, reaction back gas advances the cold low separator to be separated once more, and the thermal low-pressure separators liquid phase is advanced fractionation and partly isolated various products; The cold high pressure separator liquid phase also enters the cold low separator after decompression; Cold low separator gas phase is a hydrogen-rich gas, can advance the hydrogen recovery unit recover hydrogen or the pneumatic transmission that acts as a fuel goes out device, and the cold low separator liquid phase is advanced fractionation and partly isolated various products.
Two kinds of its common of technical scheme of the present invention are characterised in that: all be to utilize thermal low-pressure separators gas phase temperature, pressure and hydrogenous condition, by the hydrofining catalytic bed is set, carry out hydrofining reaction together to the thermal low-pressure separators gas phase or with need purified hydrocarbon ils component, thereby produce cleaning product.Different places only is the Hydrobon catalyst bed, is directly to be located at thermal low-pressure separators top in first kind of scheme, is that a hydrofining reactor is set separately in second kind of scheme, is located between thermal low-pressure separators and the cold low separator.
The beneficial effect that the inventive method has is embodied in: thermal high hydrogenation separator liquid phase is separated in thermal low-pressure separators separately or with need purified hydrocarbon ils component together first, hydrogen, lighter hydrocarbons, light oil even middle oil ingredient are told by the thermal low-pressure separators top under the temperature of stipulating, pressure, by the catalyst for refining bed being set, realize the hydrofining of this part oil product at its top.It is advantageous that and to realize effective control according to product category and specification of quality the different sorts product index, the temperature and pressure condition of while thermal low-pressure separators, can not only realize the purpose of gasoline, desulfuration of Kerosene, and under the condition higher relatively at a kind of like this pressure, that temperature is relatively low, be more conducive to satisfy the requirement of producing high-quality gasoline and kerosene.Like this, quantity and product requirement according to the refining hydrocarbon ils of need, suitably strengthen the volume of thermal low-pressure separators, suitably increase catalyst consumption, suitably strengthen the load of circulating hydrogen compressor, process furnace, with due regard to the adaptive faculty of fractionating system just can solve newly-built cover hydro-refining unit problem to be solved, therefore from the angle of full factory process optimization, effect of the present invention also is to greatly reduce the once investment tooling cost that full factory produces clean fuel.
When taking second kind of technical scheme of the present invention, when hydrofining reactor is set independently, needs the purified hydrocarbon ils also can not advance thermal low-pressure separators, and directly introduce hydrofining reactor.This scheme, wider to the adaptability of refining raw material, the control of reaction and adjusting are more flexible effectively.
Description of drawings
Fig. 1: a kind of typical flowchart of the present invention;
Fig. 2: of the present invention other plants typical flowchart;
Among the figure, the 1-high pressure hot separator, the 2-thermal low-pressure separators, 3-cold high pressure separator, 4-cold low separator, the 5-hydrofining reactor, the 6-high pressure heat exchanger, 7-interchanger, 8-hydrocracking reaction effluent, 9-high pressure hot separator gas phase, 10-high pressure hot separator liquid phase, gas phase behind the 11-refining reaction, 12-cold high pressure separator gas phase, 13-cold high pressure separator liquid phase, 14-thermal low-pressure separators gas phase, 15-thermal low-pressure separators liquid phase, 16-cold low separator gas phase, 17-cold low separator liquid phase, 18-needs the purified hydrocarbon ils.
Embodiment
Below in conjunction with accompanying drawing technical solution of the present invention is elaborated, accompanying drawing just in order to illustrate that substance of the present invention draws, not delimit the scope of the invention.
As shown in Figure 1, hydrocracking reaction effluent 8 carries out gas, liquid through the laggard high pressure hot separator 1 of high pressure heat exchanger 6 heat exchange to be separated, and high pressure hot separator 1 is operated under the condition of 200～400 ℃ of pressure 5.0～20.0MPa, temperature usually.High pressure hot separator gas phase 9 enters after interchanger 7 heat exchange coolings that cold high pressure separator 3 carries out gas, liquid separates, and cold high pressure separator 3 is operated under the condition of 40～70 ℃ of pressure 5.0～20.0MPa, temperature usually.Cold high pressure separator gas phase 12 is a hydrogen-rich gas, enters the hydrocracking reaction system after desulfurization, compression.High pressure hot separator liquid phase 10 decompression back separately or and need make with extra care hydrocarbon ils 18 and enter thermal low-pressure separators 2 together and carry out low-pressure gas-liquid and separate, thermal low-pressure separators 2 is operated under the condition of 200～400 ℃ of pressure 1.0～5.0MPa, temperature usually, thermal low-pressure separators gas phase 14 is the mixture of hydrogen and small molecules hydro carbons and light oil, the catalyst for refining bed that passes through to be arranged on the thermal low-pressure separators top from the bottom to top, the common scope (LHSV) of liquid hourly space velocity is 0.1～10hr
-1, carrying out deep desulfuration and take off arylation reaction, the gas 11 behind the refining reaction leaves thermal low-pressure separators 2 and advances cold low separator 4 and separate once more, and thermal low-pressure separators liquid phase 15 is advanced fractionation and is partly isolated various products.Cold high pressure separator liquid phase 13 also enters cold low separator 4 after decompression, cold low separator 4 is operated under the condition of 40～70 ℃ of pressure 1.0～5.0MPa, temperature usually.Cold low separator gas phase 16 is a hydrogen-rich gas, can advance the hydrogen recovery unit recover hydrogen or the pneumatic transmission that acts as a fuel goes out device, and cold low separator liquid phase 17 is advanced fractionation and partly isolated various products.
Fig. 2 and Fig. 1 flow process are basic identical, and difference only is: on thermal low-pressure separators 2 tops the Hydrobon catalyst bed is not set, and between thermal low-pressure separators 2 and cold low separator 4 hydrofining reactor 5 is set.According to Fig. 2, need purified hydrocarbon ils 18 before thermal low-pressure separators 2, to enter thermal low-pressure separators 2 with high pressure hot separator liquid phase 10, also can directly enter hydrofining reactor 5 with thermal low-pressure separators gas phase 14 from hydrofining reactor 5 tops.
The Hydrobon catalyst that the present invention relates to belongs to the conventional Hydrobon catalyst in this area, is the Hydrobon catalyst of group vib metal (mainly comprising tungsten or molybdenum) and VIII family metal (mainly comprising cobalt and nickel) as metal active constituent.
Claims (3)
1, a kind of method of hydrotreating of producing clean fuel, it is characterized in that: the hydrocracking reaction product enters high pressure hot separator and carries out gas, liquid separation after heat exchange, the high pressure hot separator gas phase enters cold high pressure separator and carries out gas, liquid separation, the cold high pressure separator gas phase is a hydrogen-rich gas, after the desulfurization of desulphurization of recycle hydrogen system is handled, advance compressor and boost, the gas after boosting is mixed into new hydrogen as recycle hydrogen and mixes hydrogen, returns the hydrocracking reaction system; High pressure hot separator liquid phase decompression back separately or and need purified hydrocarbon ils component enter together that thermal low-pressure separators carries out low pressure gas, liquid separates, at thermal low-pressure separators top filling catalyst for refining bed, the thermal low-pressure separators gas phase is from bottom to top by being arranged on the catalyst for refining bed on thermal low-pressure separators top, take off and dredge and denitrification reaction and alkene and aromatic hydrocarbons saturated reaction, advance the cold low separator then and separate once more, the thermal low-pressure separators liquid phase is advanced fractionation and is partly isolated various products; The cold high pressure separator liquid phase also enters the cold low separator after decompression; Cold low separator gas phase is a hydrogen-rich gas, advances the hydrogen recovery unit recover hydrogen or the pneumatic transmission that acts as a fuel goes out device, and the cold low separator liquid phase is advanced fractionation and partly isolated various products.
2, a kind of method of hydrotreating of producing clean fuel, it is characterized in that: the hydrocracking reaction product enters high pressure hot separator and carries out gas, liquid separation after heat exchange, enter cold high pressure separator then and carry out gas, liquid separation, the cold high pressure separator gas phase is a hydrogen-rich gas, after the desulfurization of desulphurization of recycle hydrogen system is handled, advance compressor and boost, the gas after boosting is mixed into new hydrogen as recycle hydrogen and mixes hydrogen, returns the hydrocracking reaction system; High pressure hot separator liquid phase decompression back separately or and need purified hydrocarbon ils component enter together that thermal low-pressure separators carries out low pressure gas, liquid separates, between thermal low-pressure separators and cold low separator, hydrofining reactor is set, the thermal low-pressure separators gas phase enter hydrofining reactor separately or with need purified hydrocarbon ils component together, desulfurization and denitrification reaction and alkene and aromatic hydrocarbons saturated reaction take place, reaction back gas advances the cold low separator to be separated once more, and the thermal low-pressure separators liquid phase is advanced fractionation and partly isolated various products; The cold high pressure separator liquid phase also enters the cold low separator after decompression; Cold low separator gas phase is a hydrogen-rich gas, advances the hydrogen recovery unit recover hydrogen or the pneumatic transmission that acts as a fuel goes out device, and the cold low separator liquid phase is advanced fractionation and partly isolated various products.
3, a kind of method of hydrotreating of producing clean fuel as claimed in claim 2, it is characterized in that: enter thermal low-pressure separators after the described high pressure hot separator liquid phase decompression separately and carry out low pressure gas, liquid separation, described thermal low-pressure separators gas phase and need purified hydrocarbon ils component enter hydrofining reactor together, and desulfurization and denitrification reaction and alkene and aromatic hydrocarbons saturated reaction take place.
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| CNB2006101283287A CN100436570C (en) | 2006-12-04 | 2006-12-04 | Hydrogenation method for making clean fuels |
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| CNB2006101283287A CN100436570C (en) | 2006-12-04 | 2006-12-04 | Hydrogenation method for making clean fuels |
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| CN100436570C true CN100436570C (en) | 2008-11-26 |
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| CN102268292B (en) * | 2010-06-07 | 2014-02-26 | 中国石油化工集团公司 | Combined hydrogenation method |
| CN102268293B (en) * | 2010-06-07 | 2014-01-15 | 中国石油化工集团公司 | Hydrogenation combined process |
| CN113122314B (en) * | 2019-12-31 | 2022-07-12 | 中国石油化工股份有限公司 | Gas-liquid separation process for hydrogenation reaction product |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315889B1 (en) * | 1999-10-21 | 2001-11-13 | Uop Llc | Low conversion once-through hydrocracking process |
| CN1721509A (en) * | 2004-07-14 | 2006-01-18 | 中国石油化工股份有限公司 | Medium pressure hydrocracking process for preparing jet fuel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6315889B1 (en) * | 1999-10-21 | 2001-11-13 | Uop Llc | Low conversion once-through hydrocracking process |
| CN1721509A (en) * | 2004-07-14 | 2006-01-18 | 中国石油化工股份有限公司 | Medium pressure hydrocracking process for preparing jet fuel |
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Address after: 100029 Beijing City, Chaoyang District Hui Street No. 6 Co-patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Patentee after: China Petrochemical Group Corp. Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Co-patentee before: Luoyang Petrochemical Engineering Co., China Petrochemical Group Patentee before: China Petrochemical Group Corp. |
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Free format text: FORMER OWNER: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORATION Effective date: 20130326 Owner name: SINOPEC LUOYANG PETROCHEMICAL ENGINEERING CORPORAT Free format text: FORMER OWNER: SINOPEC GROUP Effective date: 20130326 |
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Effective date of registration: 20130326 Address after: 471003 Zhongzhou West Road, Henan, China, No. 27, No. Patentee after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100029 Beijing City, Chaoyang District Hui Street No. 6 Patentee before: China Petrochemical Group Corp. Patentee before: Luoyang Petrochemical Engineering Corporation /SINOPEC |