CN107216911A - The technique that catalytic slurry purified treatment produces carbon black feed stock - Google Patents
The technique that catalytic slurry purified treatment produces carbon black feed stock Download PDFInfo
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- CN107216911A CN107216911A CN201710402670.XA CN201710402670A CN107216911A CN 107216911 A CN107216911 A CN 107216911A CN 201710402670 A CN201710402670 A CN 201710402670A CN 107216911 A CN107216911 A CN 107216911A
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- oil
- slurry
- catalytic slurry
- solid
- carbon black
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1037—Hydrocarbon fractions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/205—Metal content
- C10G2300/206—Asphaltenes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/208—Sediments, e.g. bottom sediment and water or BSW
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/40—Characteristics of the process deviating from typical ways of processing
- C10G2300/4081—Recycling aspects
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention discloses the technique that a kind of catalytic slurry purified treatment produces carbon black feed stock, comprises the following steps：A. catalytic slurry is tentatively preheated into preheater, and the heating-up temperature of preheater is 150 280 DEG C；If resin and asphalt mass fraction is more than 15% in catalytic slurry, into step B；Otherwise enter step C；B. preheated device catalytic slurry enters preseparator to catalytic slurry progress preliminary clearning separating treatment, and the resin and asphalt in catalytic slurry is separated；C. catalytic slurry enters solid-liquid separator progress solid-liquor separation, and diameter range contained in catalytic slurry is separated to form clarified oil for 0.1~500 μm of solid particle, and clarified oil introducing clarification oil tank is stored；D. solid-liquid separator carries out backwash processing by backwashing slurry oil, and the backwash outflow slurry oil after flushing is stored into the storage into backwash slurry oil holding vessel.The present invention realizes the catalytic slurry effective purified treatment high to solid content, makes its have the ability high carbon black of reproduction economic value and other chemical products.
Description
Technical field
It is espespecially a kind of by catalytic slurry purified treatment the present invention relates to oil refining heavy oil slurry oil purified treatment FIELD OF THE INVENTIONThe
Purification process technique as carbon black-yielding feedstock.
Background technology
Catalytic cracking is one of topmost heavy oil lighting technique in the current world, and oil refining enterprise is solution catalytic cracking work
The problem of catalyst coking is serious in skill is generally using the method for externally extracting oil, general refinery catalytic cracking unit's externally extracting oil
Amount account for the 3%~5% of total raw material amount, about 300~5,000,000 tons of the catalytic cracked oil pulp that China produces every year.The oil got rid of outside
Slurry frequently as waste oil to sell at a low price, and Ye You refineries as the ready-mixed oil of fuel oil, burn up externally extracting oil as fuel, this
Method not only have lost substantial amounts of catalytic slurry feedstock oil, cause very big waste, but also converter nose can be made to produce abrasion and coking.
Contain substantial amounts of condensed-nuclei aromatics in catalytic slurry, be rationally significant using catalytic slurry exploitation high value-added product.
Carbon black is a kind of big amorphous carbon of surface area, and form is light, loose and thin black powder.Carbon black is divided into rubber use
Carbon black and the class of special carbon black two, as a kind of important industrial raw materials, carbon black is mainly used in rubber industry, and special carbon black is
The carbon black of product particularity requirement can be assigned by referring to, and be obtained after typically being handled by disposable carbon black, special carbon black is usually used in
Coloring and make conductive material, common finished product is coating, ink, resin, black thin film, ink powder, film, magnetic recording tape, CD etc.,
Economic value is high.
Heavy arene content is high in catalytic cracked oil pulp and impurity is few, is the quality raw materials for preparing carbon black, the ash content of carbon black
Content be strict with below 1000ppm, correspondingly as the catalytic slurry of raw material, its contained ash content also require that 500ppm with
Under.
Currently, ash content typically up to 2000- contained by the slurry oil that is thrown away outside oil refining process catalytic cracking unit is passed through
5000ppm, the feed needs far above 500ppm, excessive solid can be accumulated in Equipment for Heating Processing, cause equipment corrosion, nothing
Method reproduction, therefore it is the task of top priority that solid particle is got rid of in purification.
The content of the invention
To solve the above problems, the present invention provides the technique that a kind of catalytic slurry purified treatment produces carbon black feed stock, realize
The catalytic slurry effective purified treatment high to solid content, make its have the ability the high carbon black of reproduction economic value and other
Chemical products, so as to change and develop the ability that carbon black industry produces high-end special carbon black, are prevented because catalytic slurry is containing too high
Solid content causes cleaning equipment to damage, and reduces production of carbon black cost, improves oil refining enterprise's income.
To achieve the above object, the technical solution adopted by the present invention is：A kind of catalytic slurry purified treatment production carbon black is former
The technique of material, comprises the following steps：
S1:The pre-heat treatment：Catalytic slurry is tentatively preheated into preheater, and the heating-up temperature of preheater is 150-280
℃；If resin and asphalt mass fraction is more than 15% in catalytic slurry, into step S2；Otherwise enter step S3；
S2. pre-separation purified treatment：The high catalytic slurry of the preheated resin and asphalt content of preheated device enters pre-
Separator, preseparator easily blocks the viscosity included in catalytic slurry height large group's colloid and the drip of liquid-solid separation device
Blue or green matter is separated from the catalytic slurry of pending purification, and then the catalytic slurry after pre-separated device processing enters separation of solid and liquid
Device；
S3. separation of solid and liquid is handled：Catalytic slurry enters solid-liquid separator and carries out solid-liquor separation, by original non-purified processing
Contained diameter range is separated for 0.1~500 μm of solid particle in catalytic slurry, forms clarified oil, and by clarified oil
Introduce clarification oil tank storage；
S4. solid-liquid separator backwash is handled：To completing the solid-liquid separator after catalytic slurry separation of solid and liquid in step S3
Backwash processing is carried out by backwashing slurry oil, recoil slurry oil can carry a large amount of solids after being backwashed to solid-liquid separator
Particle, is stored into backwash slurry oil storage tank.
As preferrred embodiment of the present invention, in step S3, the clarification partly separated through heavy oil solid-liquid separator
Oil is introduced directly into carbon black production line and used as the raw materials for production of carbon black.
It is in step S3, the clarified oil clarified in oil tank is pre- by preheater as preferrred embodiment of the present invention
Introduce carbon black production line after heat to use as the raw materials for production of carbon black, preheating temperature is 150-280 DEG C.
As preferrred embodiment of the present invention, in step in S4, backwash slurry oil is light oil, heavy oil or clarified oil storage
Clarified oil in tank.
As preferrred embodiment of the present invention, in step S4, the backwash effluent oil in slurry oil holding vessel will be backwashed
Slurry is introduced to preheater circular treatment.
As preferrred embodiment of the present invention, in step S3, solid-liquid separator is electromagnetic separator or mechanically decoupled
Device.
The beneficial effects of the present invention are：The present invention by catalytic slurry by carrying out online de- solid purified treatment, effectively solution
The de- process difficulties purified admittedly of catalytic slurry of having determined, the high catalytic slurry purified treatment of solid content is obtained can be as original
Expect the clarified oil of the costly carbon black of production economy, technological process is simple, prevents because catalytic slurry contains containing too high solid particle
Amount causes cleaning equipment to damage, and effectively reduces production cost, creates huge economic benefit.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Below by specific embodiment, the invention will be further described.
It is the process chart of the present embodiment as shown in Figure 1.
In S1 steps, catalytic slurry is stored in the first catalytic cracking respectively according to the height of resin and asphalt content
In the catalytic cracked oil pulp hold-up tank 12 of slurry oil hold-up tank 11 and second, wherein catalyzed oil in the first catalytic cracked oil pulp hold-up tank 11
Resin and asphalt mass fraction is more than colloid and drip in catalytic slurry in 15%, second catalytic cracked oil pulp hold-up tank 12 in slurry
Blue or green matter mass fraction is no more than 15%；Catalytic slurry is extracted through oil pump 2 respectively, and entering slurry oil preheater 3 by valve regulation and control enters
Row preheating, after being heated by preheater, temperature control when catalytic slurry discharges state from preheater 3 is in 150-280
In the range of DEG C, after catalytic slurry in the first catalytic cracked oil pulp hold-up tank 11 is preheated, carried out by pipeline into preseparator 4
S3 steps are directly entered after catalytic slurry in step S2 processing, the second catalytic cracked oil pulp hold-up tank 12 is preheated.
In S2 steps, after catalytic slurry in the first catalytic cracked oil pulp hold-up tank 11 is preheated, into preseparator
4, preseparator 4 easily blocks the viscosity included in pending catalytic slurry height large group's colloidal bitumen of liquid-solid separation device
Matter is separated from slurry oil, then, and the catalytic slurry after pre-separated device 4 is handled enters catalytic slurry separation of solid and liquid by Valve controlling
Device 5, into S3 steps.
In the S3 stages, the high-temperature catalytic slurry oil flowed out by preheater 3 and preseparator 4 enters catalytic slurry separation of solid and liquid
In device 5, this example, the U.S. LaBaer that solid-liquid separator 5 is used draws Bell Co.'s research and developmentHeavy oil electromagnetic separation
Device, in the presence of highfield, catalytic slurry completes solid-liquor separation with its solid particle polluter, by urging for original non-purified processing
The solid particle of 0.1~500 μm contained of diameter range is separated in carburetion slurry, forms clarified solution；Certain solid-liquid separator 5
Other kinds of solid-liquid separator, such as mechanical separator can also be used.
In the S4 stages, concentration of solid particles contained by the clarified oil of completion purified treatment is extremely low, temperature is high, a part of raw material
Oil enters in the production line of follow-up production of carbon black, has saved the energy, and another part is stored in clarification oil tank 6, catalysis
After the operating a period of time of slurry oil solid-liquid separator 5, by setting control system, suspend the purification of catalytic slurry in a short time
Processing, is carried out at backwash using the part clarified oil that purified treatment is crossed in clarification oil tank 6 is stored in solid-liquid separator 5
Reason, the effluent oil after backwash enters backwash slurry oil storage tank 7 and stored, and the clarified oil being placed in clarification oil tank 6 is through height
The extracting of pressure oil pump 8 enters clarification oil preheater 9 and preheated, and preheating temperature is 150-280 DEG C, and carbon black production line is entered after preheating
It is used to produce carbon black as the raw material of production of carbon black, wherein the backwash outflow slurry oil in backwash slurry oil storage tank 7 can be introduced to
Preheater re-starts circularly purifying process for producing clarified oil.
Embodiment of above is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is entered
Row is limited, on the premise of design spirit of the present invention is not departed from, technical side of this area ordinary skill technical staff to the present invention
In various modifications and improvement that case is made, the protection domain that claims of the present invention determination all should be fallen into.
Claims (6)
1. the technique that a kind of catalytic slurry purified treatment produces carbon black feed stock, it is characterised in that：Comprise the following steps：
A. the pre-heat treatment：Catalytic slurry is tentatively preheated into preheater, and the heating-up temperature of preheater is 150-280 DEG C；If
Resin and asphalt mass fraction is more than 15% in catalytic slurry, into step B；Otherwise enter step C；
B. pre-separation is handled：Preheated device catalytic slurry enters preseparator and carries out pre-separation processing to catalytic slurry, to catalysis
Resin and asphalt in slurry oil is separated, and subsequently enters step C；
C. separation of solid and liquid is handled：Catalytic slurry enters solid-liquid separator and carries out solid-liquor separation, by the catalysis of original non-purified processing
Contained diameter range is separated for 0.1~500 μm of solid particle in slurry oil, forms clarified oil, and clarified oil is introduced
Clarify oil tank storage；
D. solid-liquid separator backwash is handled：Solid-liquid separator after completion catalytic slurry separation of solid and liquid in step C is passed through anti-
Rinse slurry oil and carry out backwash processing, and the backwash outflow slurry oil after flushing is stored into the storage into backwash slurry oil holding vessel
Deposit.
2. the technique that catalytic slurry purified treatment according to claim 1 produces carbon black feed stock, it is characterised in that：Step C
In, the clarified oil partly separated through heavy oil solid-liquid separator is introduced directly into carbon black production line.
3. the technique that catalytic slurry purified treatment according to claim 1 produces carbon black feed stock, it is characterised in that：Step C
In, by the clarified oil clarified in oil tank by introducing carbon black production line after preheating, preheating temperature is 150-280 DEG C.
4. the technique that catalytic slurry purified treatment according to claim 1 produces carbon black feed stock, it is characterised in that：Step C
In, backwash slurry oil is the clarified oil in light oil, heavy oil or clarification oil tank.
5. the technique that catalytic slurry purified treatment according to claim 4 produces carbon black feed stock, it is characterised in that：Step D
In, backwash outflow slurry oil in backwash slurry oil holding vessel is introduced to preheater circular treatment.
6. the technique that catalytic slurry purified treatment according to claim 1 produces carbon black feed stock, it is characterised in that：Step C
In, solid-liquid separator is electromagnetic separator or mechanical separator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710402670.XA CN107216911A (en) | 2017-06-01 | 2017-06-01 | The technique that catalytic slurry purified treatment produces carbon black feed stock |
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| CN201710402670.XA CN107216911A (en) | 2017-06-01 | 2017-06-01 | The technique that catalytic slurry purified treatment produces carbon black feed stock |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723024A (en) * | 2017-11-02 | 2018-02-23 | 陈文星 | A kind of intensive slurry oil utilization system and its handling process |
| CN108641747A (en) * | 2018-05-24 | 2018-10-12 | 白鹰 | A kind for the treatment of process and its system filtering production needle-shape coke raw material oil using catalytic slurry |
| CN108753353A (en) * | 2018-05-24 | 2018-11-06 | 白鹰 | A kind for the treatment of process and its system filtering production special carbon black feedstock oil using catalytic slurry |
| CN111303938A (en) * | 2019-09-10 | 2020-06-19 | 武汉兰兆科技有限公司 | Method for producing needle coke raw oil by catalyzing oil slurry to remove solids efficiently |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633849A (en) * | 2009-08-21 | 2010-01-27 | 广东新华粤石化股份有限公司 | Method for removing catalyst powder from catalytic cracking slurry oil |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN103265969A (en) * | 2013-06-05 | 2013-08-28 | 中国石油大学(华东) | Novel catalytic slurry oil solid removal flocculant |
| CN104672952A (en) * | 2013-11-27 | 2015-06-03 | Ifp新能源公司 | Process for the production of carbon black from at least one FCC slurry cut, comprising a specific hydrotreatment |
-
2017
- 2017-06-01 CN CN201710402670.XA patent/CN107216911A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633849A (en) * | 2009-08-21 | 2010-01-27 | 广东新华粤石化股份有限公司 | Method for removing catalyst powder from catalytic cracking slurry oil |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN103265969A (en) * | 2013-06-05 | 2013-08-28 | 中国石油大学(华东) | Novel catalytic slurry oil solid removal flocculant |
| CN104672952A (en) * | 2013-11-27 | 2015-06-03 | Ifp新能源公司 | Process for the production of carbon black from at least one FCC slurry cut, comprising a specific hydrotreatment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107723024A (en) * | 2017-11-02 | 2018-02-23 | 陈文星 | A kind of intensive slurry oil utilization system and its handling process |
| CN108641747A (en) * | 2018-05-24 | 2018-10-12 | 白鹰 | A kind for the treatment of process and its system filtering production needle-shape coke raw material oil using catalytic slurry |
| CN108753353A (en) * | 2018-05-24 | 2018-11-06 | 白鹰 | A kind for the treatment of process and its system filtering production special carbon black feedstock oil using catalytic slurry |
| CN111303938A (en) * | 2019-09-10 | 2020-06-19 | 武汉兰兆科技有限公司 | Method for producing needle coke raw oil by catalyzing oil slurry to remove solids efficiently |
| CN111303938B (en) * | 2019-09-10 | 2022-08-12 | 武汉兰兆科技有限公司 | Method for producing needle coke raw oil by catalyzing oil slurry to remove solids efficiently |
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Application publication date: 20170929 |