CN101575537B - Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature - Google Patents
Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature Download PDFInfo
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- CN101575537B CN101575537B CN 200810064451 CN200810064451A CN101575537B CN 101575537 B CN101575537 B CN 101575537B CN 200810064451 CN200810064451 CN 200810064451 CN 200810064451 A CN200810064451 A CN 200810064451A CN 101575537 B CN101575537 B CN 101575537B
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Abstract
The invention relates to a process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature, which comprises the following steps of filtration, prefractionation, hydrogenation for refining and fractionation. A decompressing and shunting flow is adopted, and a reaction part adopts a cold shunting flow to simplify the flow; a fractionation part adopts flows of a fractionating tower and a stabilization tower, and after impurities of raw materials are mechanically removed, the raw materials enter a prefractionating tower to be processed by adopting a negative pressure operation, noncondensable gas in a reflux tank at the top of the prefractionating tower is pumped out; after being cooled to 40 DEG C by a water cooler in a pumping system and entering an oil skimming tank for three-phase separation, a part of oil is sent to a hydrogenated raw oil storage pump of a tank area by an emptying oil pump; after oil at the bottom of the prefractionating tower at 380-420 DEG C is thermally polymerized in an asphalt modifying device, high-quality modified asphalt is prepared; after being distillated and extracted at 360-380 DEG C, one part of prefractionated modified oil returns once again to prefractionated raw oil after secondary filtration to remix the raw oil; and the other part of the prefractionated modified oil is sent to a hydrogenated raw oil storage tank for hydrogenation. The process is applied to the field of coal chemical industry.
Description
Technical field:
The present invention relates to the technique that a kind of middle coalite tar hydrogenation is produced light-weight fuel oil, heavy fuel oil (HFO) and high-quality asphalt.
Background technology:
The existing technique of coal tar hydrogenating is the existing purified gas purifying hydrogen of hydrogen more than needed of coal dragonization chemical company in utilizing, and utilize oily coal tar in present byproduct PKM vapourizing furnace, fractionation production hydrogenating materials and coal heavy oil processed, adopt hydrogenation technique to carry out upgrading to hydrogenating materials.Upgraded product makes petroleum naphtha and coal fuel oil processed through fractionation, and the hydrocarbon gas of production process by-product send the fuel gas pipe network, coal heavy oil processed.
The raw material prefractionation partly adopts decompression shunting flow process, reduces cut point, slows down condensation, coking speed, the prolong operation cycle of inferior feedstock oil high-temperature heating process, and reactive moieties adopts cold minute flow process, simple flow; Fractionation partly adopts separation column and stabilizer tower flow process.
Summary of the invention:
The purpose of this invention is to provide a kind of utilization ratio that improves stock oil, improve the technique that the middle coalite tar hydrogenation of cut and asphalt quality is produced light-weight fuel oil, heavy fuel oil (HFO) and high-quality asphalt.
Above-mentioned purpose realizes by following technical scheme:
The production of middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, its composition comprises: filter, prefractionation, hydrofining, fractionation process, three mixed coal tar remove through centrifuging solid mechanical impurity and the water that is greater than 50 microns, and then remove through positive press filtration the solid particulate that is greater than 25 microns, two-step approach enters preliminary fractionator after removing the solid mechanical impurity, sub-preliminary fractionator adopts negative-pressure operation, vacuum tightness is-0.05MPA tower top evacuation adopts low-pressure steam as power, non-condensable gas in prefractionation tower top return tank is extracted out, after entering skimming tank carry out three phase separation after water cooler in evacuation system being cooled to 40 degree, non-condensable gas enters atmosphere, part oil is delivered to tank field hydrogenating materials oil measure tank by the emptying oil pump, oily(waste)water is pumped into the sour water tank by oily(waste)water, at the bottom of the preliminary fractionator tower, oil 380-420 degree is in Modified Pitch Plant after thermopolymerization, come out of the stove, product is the high-quality modified pitch, upgrading oil after prefractionation, in prefractionation stock oil after a part comes back to cascade filtration after the extraction of 360-380 degree cut, return and join stock oil, another part goes hydrogenation reaction stock oil basin to wait for hydrogenation.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, and described filtration is by light oil, middle oil and residual oil proportionally 1: 6: 3-1: within 20: 10, three mixed coal tar are by the filtration of efficient centrifugal strainer.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, and described hydrofining is that hydrogenating desulfurization, hydrodenitrification, hydrogenation deoxidation, hydrogenation of olefins, aromatic hydrogenation are fullly closed, hydrocracking, hydrodemetallation (HDM), condensation reaction.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, described fractionation process is that the low minute oil partly come from refining reaction enters separation column through heat exchange after 275 degree, tower top oil gas carries out the oil gas water three phase separation through separation column air cooler condensing cooling to entering separation column top return tank after 40 degree, the gas flashed off drains into the fuel gas pipe network, sulfur-bearing is containing the helpless sour water tank of ammonia sewage, an oil phase part is as trim the top of column, a part is removed stabilizer tower as thick gas and oil, diesel oil segmentation extraction at the bottom of tower: a part is made the stabilizer reboiler thermal source and is added separation column through reboiler furnace, it is coal light-weight fuel oil processed that another part is cooled to 40 degree to go to tank field through heat exchange, being greater than at the bottom of the tower of 350 degree diesel oil, to go to tank field through heat exchange to 50 degree be that coal heavy fuel oil (HFO) processed is heavy gas oil, thick gas and oil enters further rectifying after stabilizer tower, obtain petroleum naphtha.
This technical scheme has following beneficial effect:
1. the present invention, due to light oil is added in coal tar, adopts the method for light oil azeotropic continuously dehydrating, makes the effect of coal tar dehydration remarkable.Tower top refluxes with light oil, and water and light oil form azeotropic mixture and overflowed by tower top, enter separator after condensing cooling, and the light oil after minute water outlet is back to dehydration tower, and dehydration of tar can be taken off to below 0.1% by original 0.5%.
Tar after dehydration can reduce the hear rate of Distallation systm, increases the throughput of equipment, reduces the Distallation systm resistance, improves cut and asphalt quality, alleviates equipment corrosion.
2. the present invention has added light oil in coal tar, oil viscosity in coal tar is descended, the permeability of strainer is strengthened, cause the fracture of a part of macromolecule side chain and group in coal tar simultaneously, filter effect is reduced to 0.015%. by original content of impurities 1.57%
3. wash carbolineum and return and join stock oil technique because novel process has adopted, not only improved a gasification temperature (by original-0.05MPa, 275 rise to-0.05MPa of degree, 350 degree), underpressure distillation has slowed down the Pintsch process of coal tar, make upgrading oil distillate productive rate and greatly improve, and improved gasification generation coal residual oil processed and utilization ratio and utility value.Simultaneously steamed maximum naphthalenes from tar, acenaphthene, fluorenes, anthracene, phenol, pyridine, quinoline etc., and output the very high middle temperature tar pitch of softening temperature.
4. by middle coalite tar hydrogenation production lightweight, heavy fuel oil (HFO) and high-quality asphalt novel process, coalite tar hydrogenation production lightweight (petroleum naphtha and solar oil) heavy fuel oil (HFO) (dark marine diesel fuel) and high-quality asphalt and blank in China have been filled up.Be factory's minimum income that reaches 5,574 ten thousand yuan of increasing economic efficiency every year simultaneously. in state, in the people, all gain everything and lose nothing.
The preparing fuel oil by coal tar hydrogenation process using prefractionation upgrading, four parts of hydrogen manufacturing and shortening and fractionation complete, when the present invention adopts this four parts at the same time, the utilization ratio of stock oil is improved, rear and light oil are processed in the slagging-off that for the first time residual oil dewatered, middle oily stock oil mixes coal processed heavy gas oil oil fuel processed, wash carbolineum and return that to join stock oil technique be to have used for reference the petroleum products oil refining process, in oil refining technique is combined with the Coal Chemical Industry refinery in low oil temperature preparing fuel oil by coal tar hydrogenation technological process, its popularization is to alleviating China and world fuel oil anxiety and greatly developing the Coal Chemical Industry cause, find the substitute energy of petroleum products to make positive contribution.
The specific embodiment of the present invention:
Embodiment 1:
The production of middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, its composition comprises: filter, prefractionation, hydrofining, fractionation process, described prefractionation is that three mixed coal tar after filtering are entered to preliminary fractionator, positive press filtration is removed the solid particulate that is greater than 25 microns, tentatively remove the solid mechanical impurity, preliminary fractionator adopts negative-pressure operation, vacuum tightness is-0.05MPA tower top evacuation adopts low-pressure steam as power, non-condensable gas in prefractionation tower top return tank is extracted out, after entering skimming tank carry out three phase separation after water cooler in evacuation system being cooled to 40 degree, non-condensable gas enters atmosphere, part oil is delivered to tank field hydrogenating materials oil measure tank by the emptying oil pump, oily(waste)water is pumped into the sour water tank by oily(waste)water, at the bottom of the preliminary fractionator tower, oil 380-420 degree is in Modified Pitch Plant after thermopolymerization, come out of the stove, product is the high-quality modified pitch, upgrading oil after prefractionation, in prefractionation stock oil after a part comes back to cascade filtration after the extraction of 360-380 degree cut, return and join stock oil, another part goes hydrogenation reaction stock oil basin to wait for hydrogenation.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, and described filtration is by light oil, middle oil and residual oil proportionally 1: 6: 3-1: within 20: 10, three mixed coal tar are by the filtration of efficient centrifugal strainer.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, and described hydrofining is that hydrogenating desulfurization, hydrodenitrification, hydrogenation deoxidation, hydrogenation of olefins, aromatic hydrogenation are fullly closed, hydrocracking, hydrodemetallation (HDM), condensation reaction.
The production of described middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, described fractionation process is that the low minute oil partly come from refining reaction enters separation column through heat exchange after 275 degree, tower top oil gas carries out the oil gas water three phase separation through separation column air cooler condensing cooling to entering separation column top return tank after 40 degree, the gas flashed off drains into the fuel gas pipe network, sulfur-bearing is containing the helpless sour water tank of ammonia sewage, an oil phase part is as trim the top of column, a part is removed stabilizer tower as thick gas and oil, diesel oil segmentation extraction at the bottom of tower: a part is made the stabilizer reboiler thermal source and is added separation column through reboiler furnace, it is coal light-weight fuel oil processed that another part is cooled to 40 degree to go to tank field through heat exchange, being greater than at the bottom of the tower of 350 degree diesel oil, to go to tank field through heat exchange to 50 degree be that coal heavy fuel oil (HFO) processed is heavy gas oil, thick gas and oil enters further rectifying after stabilizer tower, obtain petroleum naphtha.
Claims (2)
1.
the production of a kind of middle coalite tar hydrogenation is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, its composition comprises: filter, prefractionation, hydrofining, fractionation process, it is characterized in that: three mixed coal tar remove through centrifuging solid mechanical impurity and the water that is greater than 50 microns, and then remove through positive press filtration the solid particulate that is greater than 25 microns, two-step approach enters preliminary fractionator after removing the solid mechanical impurity, preliminary fractionator adopts negative-pressure operation, vacuum tightness is-0.05MPa tower top evacuation adopts low-pressure steam as power, non-condensable gas in prefractionation tower top return tank is extracted out, after entering skimming tank carry out three phase separation after water cooler in evacuation system being cooled to 40 degree, non-condensable gas enters atmosphere, part oil is delivered to tank field hydrogenating materials oil measure tank by the emptying oil pump, oily(waste)water is pumped into the sour water tank by oily(waste)water, at the bottom of the preliminary fractionator tower, oil 380-420 degree is in Modified Pitch Plant after thermopolymerization, come out of the stove, product is the high-quality modified pitch, upgrading oil after prefractionation, in prefractionation stock oil after a part comes back to cascade filtration after the extraction of 360-380 degree cut, return and join stock oil, another part goes hydrogenation reaction stock oil basin to wait for hydrogenation, described filtration is by light oil, middle oil and the residual oil proportionally three mixed coal tar of 1:6:3-1:20:10 filter by the efficient centrifugal strainer.
2.
middle coalite tar hydrogenation according to claim 1 production is light, the technique of heavy fuel oil (HFO) and high-quality asphalt, it is characterized in that: described hydrofining is that hydrogenating desulfurization, hydrodenitrification, hydrogenation deoxidation, hydrogenation of olefins, aromatic hydrogenation are fullly closed, hydrocracking, hydrodemetallation (HDM), condensation reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810064451 CN101575537B (en) | 2008-05-06 | 2008-05-06 | Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810064451 CN101575537B (en) | 2008-05-06 | 2008-05-06 | Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature |
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| Publication Number | Publication Date |
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| CN101575537A CN101575537A (en) | 2009-11-11 |
| CN101575537B true CN101575537B (en) | 2013-06-26 |
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| CN 200810064451 Expired - Fee Related CN101575537B (en) | 2008-05-06 | 2008-05-06 | Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892065B (en) * | 2010-01-10 | 2013-08-28 | 何巨堂 | Coal tar processing method |
| CN101928594A (en) * | 2010-09-30 | 2010-12-29 | 长岭炼化岳阳工程设计有限公司 | Method for removing impurities from coal tar heavy oil |
| CN102002385B (en) * | 2010-12-07 | 2014-08-06 | 上海蓝科石化工程技术有限公司 | Device and method for separating residue from catalytic cracking oil slurry |
| US9222034B2 (en) | 2013-11-19 | 2015-12-29 | Uop Llc | Process for removing a product from coal tar |
| CN104388120B (en) * | 2014-07-23 | 2016-08-17 | 山东恒导石油化工股份有限公司 | Organic heat carrier recycling process for selective hydrogenation |
| CN111826188B (en) * | 2020-07-07 | 2021-09-07 | 鞍钢化学科技有限公司 | Raw material asphalt for carbon-based new material and production process thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500853A (en) * | 2002-11-18 | 2004-06-02 | 中唯炼焦技术国家工程研究中心有限责 | Oil for fuel preparation modified from coke tar refuse in cokeoven plant and preparing method thereof |
| CN1597866A (en) * | 2004-07-30 | 2005-03-23 | 山西东辉煤焦化集团有限公司 | Process for producing chemical industry products and fuel oil from coal tar |
| CN1693190A (en) * | 2005-04-08 | 2005-11-09 | 中钢集团鞍山热能研究院 | Method for mfg. particle active carbon and light coal tar by tar dregs |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500853A (en) * | 2002-11-18 | 2004-06-02 | 中唯炼焦技术国家工程研究中心有限责 | Oil for fuel preparation modified from coke tar refuse in cokeoven plant and preparing method thereof |
| CN1597866A (en) * | 2004-07-30 | 2005-03-23 | 山西东辉煤焦化集团有限公司 | Process for producing chemical industry products and fuel oil from coal tar |
| CN1693190A (en) * | 2005-04-08 | 2005-11-09 | 中钢集团鞍山热能研究院 | Method for mfg. particle active carbon and light coal tar by tar dregs |
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Application publication date: 20091111 Assignee: Qitaihe Baotailong Shengmai Coal Chemical Co., Ltd. Assignor: Mou Yanchun Contract record no.: 2013230001782 Denomination of invention: Process for producing light and heavy fuel oil and high-quality asphalt by hydrogenating coal tar at medium and low temperature Granted publication date: 20130626 License type: Exclusive License Record date: 20130906 |
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