CN102002385B - Device and method for separating residue from catalytic cracking oil slurry - Google Patents
Device and method for separating residue from catalytic cracking oil slurry Download PDFInfo
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Abstract
The patent discloses a device for separating residue from catalytic cracking oil slurry, which comprises at least two filter sets and a filter cake tank, wherein the at least two filter sets are formed by connecting pre-filters and fine filters; the filter cake tank is arranged between the bottoms of the pre-filters and the fine filters for accommodating a peeled filter cake and washed washing oil; the bottom of each pre-filter is connected with a raw material oil slurry inlet and a washing oil inlet, and the bottom of each fine filter is connected and provided with a washing oil inlet for washing the filter core of the filter; an oil slurry filtrate outlet is formed on the top of each fine filter; and backwash air inlets are formed on the tops of both the pre-filters and the fine filters. Meanwhile, the patent also discloses a method using the device. The residual catalyst content of the oil slurry filtrate processed by the device in the patent is less than 0.01 percent, and filtrate content is less than 0.02 percent.
Description
Technical field
The present invention relates to petrochemical industry, relate in particular to a kind ofly by removing by filter catalytically cracked oil studies on asphaltene and residual catalyst particle, improve device and the method for catalytically cracked oil quality.
Background technology
Catalytic cracking is most important a kind of heavy oil lighting technique in petroleum refining industry, the fragrant component that contains a large amount of aromatic hydrocarbons and naphthenic hydrocarbon and the low condensation degree of part in catalytically cracked oil, wherein the fragrant component of contained naphthenic hydrocarbon and condensation degree can be as the raw material of hydrocracking, production high-quality light hydrocarbon component; In addition, catalyzer cracking slurry oil is because component is heavy, fragrance part content is high, therefore has that density is large, viscosity is large, with the feature such as the solvability of macromolecular material and consistency.But common catalytically cracked oil is because bituminous matter and the residual existence of granules of catalyst, especially the residual existence of granules of catalyst, limited the exploitation of its purposes, petroleum refining industry is generally only used it as low side fuel at present, thereby has caused the profligacy of resource.
Removed residual catalyst particle and bitum high-quality catalyzer cracking slurry oil can make full use of its hydrocarbon composition feature advantage, as improving the Rubber Softener of Rubber processing performance and the softening agent of Vinylite, as cracking stock, further cracking generates light ends, also can be used as the raw materials for production of needle coke, carbon black and carbon fiber.Purposes is very extensive.
At present, by separate asphaltenes and the residual raising catalytically cracked oil of granules of catalyst quality, be a global problem.There is correlation technique patent home and abroad, through our retrieval analysis, finds to mainly contain following several separation method:
The first, adopts the combination of a kind of separate modes such as precipitation, extraction, filtration, cyclonic separation or several separate modes to remove the residual catalyst in catalytically cracked oil, to improve catalytically cracked oil quality.For example application number is US19900589429, the applying date is the United States Patent (USP) " Removal of particulate solids from a hot hydrocarbon slurry oil " (document number is US5076910) in September 28 nineteen ninety, this patent adopts a kind of slurry oil heavier than catalytic slurry to make extraction solvent, after mixing with slurry oil by a certain percentage, enter a flash tank, allow catalytically cracked oil get rid of from flash drum overhead in the mode of gaseous state flash distillation, thereby granules of catalyst is transferred in heavier solvent by slurry oil, to reach the object of purifying and catalytic cracking slurry oil.Although this patent is purifying and catalytic cracking slurry oil thoroughly, processing condition are harsh, cost is too high, are not easy to industrialization promotion.
The second, adopts and in slurry oil, introduces organic solvent (water) or other auxiliary agents, by extraction, breakdown of emulsion, by in slurry oil, residual catalyst transfer of granules is in extraction solvent, and the weak point of this method is not only will consume a large amount of solvents, and can not realize liquid-solid thorough separation.For example application number is to be that the Chinese invention patent " a kind of capturing settling agent and remove the method for catalyst solid powder in slurry oil " on September 21st, 2009 provides a kind of by add a kind of capturing settling agent in slurry oil 200910190490.5 applyings date, help granules of catalyst sedimentation, and by the sedimentation of certain hour, reach the object of liquid-solid separation, this technology not only cost is high, and liquid-solid separation is not thorough, separated rear slurry oil still contains the granules of catalyst solid of 0.05%wt.
The third, adopt the method for filtering separation to carry out residual catalyst particle in separated slurry oil, for example application number is 99109217.1, the applying date is a kind of method that the Chinese invention patent method of separating catalyst particles " a kind of from catalytically cracked oil " on June 22nd, 1999 has proposed filtering separation catalytically cracked oil, adopt parallel way to connect three filter plants, by steps such as filtration, back flushing, dilutions, realize catalyst solid particle separated with slurry oil.The method adopts the method for physical filtering to carry out separating catalyst particles completely, be a kind of comparatively comparatively simple method of economy, technique of cost, but in the middle of actual motion, we find this patented method, and there are the following problems:
1, strainer easily stops up, through investigation, adopt at present filter separation method to carry out the latch up phenomenon of the general filter response of technician of factory of chemical oil refining of catalyst recovery separation very serious, often cause break-down maintenance, waste time and energy, the phenomenon of filter stoppage causes domestic and international producer substantially to abandon adopting the method to carry out catalytically cracked oil separation, and change, adopt the first or second method to carry out slurry oil separation, this also can the distributed number in this field can know something about from the domestic patent application of China, after Oil Refinery No.1, Northern China Petroleum Administration in 1999 has applied for the method for separating catalyst particles " a kind of from catalytically cracked oil ", domestic just never again about adopting the new patent application of filter separation method separating catalyst particles from catalytically cracked oil, that organic solvent (water) is introduced in the second employing in slurry oil or other auxiliary agent methods come the patent application of separating catalyst particles constantly to increase on the contrary, illustrate that filter stoppage is to adopt filter separation method to carry out the Pinch technology of catalyst separating, be difficult to be broken through always.
2, the granules of catalyst that still contains 0.02% left and right in this patented method slurry oil after processing, is difficult to further promote the quality of slurry oil clear liquid.
Recognized just the cost economy of filtration and separation techniques, and considered the bottleneck place of filtering separation, contriver is through constantly research and development test, finally overcome the technical problem existing in prior art, provide a kind of simply, effectively, separating residual granules of catalyst and bituminous matter from common catalytically cracked oil cheaply, thereby the method for producing high-quality slurry oil.
Summary of the invention
The invention provides a kind of from catalytically cracked oil the method for separating residue, improved existing filter separation method, improved the quality of slurry oil clear liquid after processing simultaneously.The present invention also provide simultaneously a kind of from catalytically cracked oil the device of separating residue, utilize this device to adopt method of the present invention just can obtain high-quality slurry oil.
Technical scheme of the present invention is:
From catalytically cracked oil, a device for separating residue, comprises
At least two groups are connected in series the filter set forming with fine filter by prefilter;
One bottom that is connected to described prefilter and described fine filter is for the filter cake tank of the wash oil after being installed with filter cake after peeling off and cleaning;
The bottom of described prefilter is equipped with a stock oil slurry inlet and wash oil import, and the bottom of described fine filter is equipped with the wash oil import for filter rinsed filter core; The top of described fine filter is provided with the outlet of slurry oil cleaner liquid; The top of described prefilter and described fine filter is equipped with the backwash gas import of washing operation for carrying out filter-core back-flushing.
Further, described filter set is the first filter set and the second filter set, when the prefilter of the first filter set or the filtration pressure difference of fine filter, to reach default maximal pressure poor, the first filter set stops slurry oil filtration, the stock oil slurry inlet of the second filter set is opened and is carried out filter operation, the backwash gas of certain pressure is oppositely introduced the first filter set its filter element is carried out to back flushing, and filter cake is peeled off from its filter element.
Further, the filter core of described prefilter is to carve shaped metal to be wound around silk filter core, and the filtering accuracy scope of described filter core is 2～10 microns.The structure of carving shaped metal winding silk filter core can effectively guarantee that filter core is not blocked.
Further, the filter core of described fine filter is asymmetric metal powder sintered microfiltration membrane filter core, and the filtering accuracy scope of described filter core is 0.2～1.0 micron.Adopt asymmetric metal powder sintered microfiltration membrane filter core can effectively guarantee the precision of filtering.
Further, described filter set filtration temperature scope is 250～350 ℃, and filter pressure is 0.5～1.2Mpa; The default maximal pressure of described filter set is poor is 0.20～0.35MPa, and described backwashing pressure is 0.3～0.6Mpa, and back flushing temperature range is 200～320 ℃.
Further, described filter set filtration temperature scope is 270～300 ℃, and filter pressure is 0.7～1.0Mpa.
Further, described slurry oil cleaner liquid residual catalyst content is less than 0.01%, and asphalt content is less than 0.02%.
This patent also provides a kind of method of utilizing said apparatus separating residue from catalytically cracked oil, comprises following processing step:
(a) the first filter set pre-filtering: the prefilter of the first filter set carries out pre-filtering to raw material slurry oil, filters out granules of catalyst and the bituminous matter of volume particle size in raw material slurry oil;
(b) the first filter set essence is filtered: the fine filter of the first filter set filters again to slurry oil after pre-filtering, and the granules of catalyst of the small grain size in slurry oil after pre-filtering and bituminous matter are filtered out and obtain slurry oil cleaner liquid;
When the prefilter of the first filter set or the filtration pressure difference of fine filter reach set(ting)value, the first filter set stops slurry oil and filters, the second filter set is carried out pre-filtering, essence filtration to slurry oil, prefilter and fine filter that the backwash gas of certain pressure is oppositely introduced the first filter set carry out back flushing to its filter element, and filter cake is peeled off from described filter element; When the prefilter of the second filter set or the filtration pressure difference of fine filter reach set(ting)value, the second filter set stops slurry oil and filters, the first filter set again to slurry oil carry out pre-filtering, essence is filtered, and makes the first filter set, the second filter set hocket filter operation, backwash operation.
Further, described filter cake, after described filter element is peeled off, adopts wash oil to clean described filter element.
Further, the filter cake after described filter element is peeled off, is discharged into filter cake tank with together with wash oil after cleaning described filter element.
The whole service process of apparatus of the present invention is: first the raw material slurry oil of certain temperature enters the prefilter of the first filter set, the granules of catalyst of volume particle size and bituminous matter are held back by the prefilter of the first filter set, the initial filter slurry oil of carrying catalyst particle secretly enters the fine filter of the first filter set after being discharged by prefilter, in fine filter, catalyst particle is trapped within fine filter surface, the slurry oil cleaner liquid of the bituminous matter that has been removed and granules of catalyst, becomes the finished product-high-quality slurry oil.In operational process, when the filter cake of the cartridge surface of the strainer of the first filter set reaches certain thickness, filtration pressure difference reaches after set(ting)value (0.35Mpa), the first filter set stops slurry oil and filters, the slurry oil import of the second filter set is opened, the second filter set is according to pre-filtering, the order that essence is filtered starts slurry oil filter operation, meanwhile, the backwash gas of certain pressure is carried out to back flushing from the strainer of reverse introducing the first filter set to filter core, filter cake is peeled off from filter core, with cleaning slurry oil, clean filter core again, filter cake after peeling off is discharged into filter cake tank with together with wash oil after cleaning.Always can continuous operation for assurance equipment, the filter set of two groups of parallel connections is at least set, when the first filter set stops filtering just in back flushing, the second filter set can also be proceeded filter operation, thereby guarantees the continuity of filter operation.
Technique effect of the present invention is embodied in:
Adopted cascade filtration, in prior art, owing to adopting single strainer to filter, cause filter stoppage, trace it to its cause and be the requirement of filtering accuracy and the contradiction of filtration velocity, by a strainer, just expect the granules of catalyst in raw material slurry oil to filter out as much as possible, guarantee again the smooth and easy and speed of filtering, this is the contradiction that is difficult to mediation, therefore simultaneously, in practice, often cause the regular obstruction of strainer, finally reelect other separation methods.The cascade filtration adopting in the present invention, by filtration procedure being decomposed into pre-filtering, filter with essence, the filtering accuracy that makes whole device reaching step by step, rather than just reach suddenly quickly, thereby from source, solved the problem of filter stoppage, secondly, back flushing adopts wash oil to clean later, thereby makes the filtration capacity of filter element return to the front level of stopping up; Again the running environment of device is further optimized, thereby reduce to filter, stopped up possibility.Adopt the final slurry oil cleaner liquid residual catalyst content obtaining of method of the present invention and device to be less than 0.01%, asphalt content is less than 0.02%, and effect is very obvious.
accompanying drawing explanation
By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the present invention will become apparent and easily understand.
Fig. 1 is the structural representation of the device from catalytically cracked oil separating residue of the present invention.
Embodiment
As shown in Figure 1, a kind ofly utilize processing method of the present invention from the device of catalytically cracked oil separating residue, comprise two set filter groups, the first filter set 1 is composed in series by prefilter 101 and fine filter 102, the top of prefilter 101 is provided with a pre-filtering oil plant outlet, this pre-filtering oil plant outlet is connected to the bottom of fine filter 102, the second filter set 2 is composed in series by prefilter 201 and fine filter 202, the top of prefilter 201 is provided with a pre-filtering oil plant outlet, and this pre-filtering oil plant outlet is connected to the bottom of fine filter 202.Filter cake tank 3 is arranged on the bottom of prefilter 101,201 and fine filter 102,202, for the wash oil after being installed with filter cake after peeling off and cleaning; The bottom of prefilter 101,201 is equipped with a stock oil slurry inlet and wash oil import, and the bottom of fine filter 102,202 is equipped with the wash oil import for filter rinsed filter core; The top of fine filter 102,202 is provided with the outlet of slurry oil cleaner liquid; The top of prefilter 101,201 and fine filter 102,202 is equipped with for carrying out the backwash gas import of backwash operation.
In operational process, when the prefilter 101 of the first filter set 1 or the filtration pressure difference of fine filter 102 reach 0.35Mpa, the first filter set 1 stops slurry oil filtration, the backwash gas of certain pressure is oppositely introduced to 1 pair of filter element of the first filter set and carry out back flushing, filter cake is peeled off from described filter element, now, the second filter set 2 is started working, raw material slurry oil is now no longer input to prefilter 101, and be input to prefilter 201, like this, the filter operation that hockets of the first filter set 1 and the second filter set 2, thereby assurance device can run well always.
Certainly, in this patent, for aggrandizement apparatus treatment capacity, can adopt many set filters group, thereby increase treatment capacity, also in order preventing, to have many set filters group in backwash operation simultaneously, and not have filter set to carry out normal processing.In this patent, prefilter and fine filter can be prefilter group, the fine filter groups that many strainers form, and can further reduce like this obstruction of strainer.
In this patent, prefilter 101,201 adopts carves a shaped metal winding silk filter core, and the filter core outside surface of this strainer is wound around wire by one deck wedge shape and forms, and inside is enhancement type skeleton structure.Because the filtration duct of cartridge surface is the narrowest, so there is not the pollution problem of filter core duct, can effectively guarantee that filter core is not blocked.Fine filter 102,202 adopts asymmetric metal microfiltration membrane filter core, the metal that effective filtration medium of this filter core is ridden on the porous metal material that hole is thicker by one deck forms, the metallics of outside surface is sintered to the secondary filter layer of one deck densification, and the filtering accuracy of this filtering layer reaches as high as 0.1 μ m.This structures shape the filtration feature of its surface filtration, there is not blockage problem.
The optimum temperature range of filter set filter operation is 270～300 ℃, and temperature is too low, and the viscosity of material uprises, and filter core is under same pressure reduction condition, and flux diminishes, and processing power reduces; If excess Temperature, can cause the coking containing two strong components of slurry oil, increase separating difficulty.The optimal pressure range of filter operation is: 0.7～1.0MPa, and pressure is too low, and material flow reduces, and the slurry oil processing power of the filter core of same area decreases; Pressure is too high, can increase power consumption and equipment investment cost.
The optimal pressure range of back flushing is: 0.4～0.5MPa, the too high easy damage filter core of pressure; Pressure is too low, and filter cake removal effect is bad.The optimum temps of cleaning process operation is: 250～280 ℃, temperature is too low, and the viscosity of material uprises, and filter core is under same pressure reduction condition, and flow velocity diminishes, and cleaning performance is bad; If excess Temperature, can cause the coking containing two strong components of slurry oil, increase residual load.
In prefilter 101,201, the optimum filtration precision of filter core is: 3～7 microns, filtering accuracy is too thick, can cause the bituminous matter of filtering early stage to wear filter; Filtering accuracy is too high, and treatment capacity reduces, and filter cake pressure reduction gathers way soon, is unfavorable for that long period operates.The metal microfiltration membrane optimum filtration precision of fine filter 201,202 is: 0.3～0.6 micron, filtering accuracy is too thick, can cause the less granules of catalyst of minute quantity particle diameter that filters early stage to wear filter; And the ratio that in catalyzer, particle is less than 0.3 μ m is less than 0.001%, by means of filter cake, can complete the completely separated of catalyzer and slurry oil completely.
In order further to check the technique effect of patent device and method, the experimental data as following table is now provided, experiment condition is: the residual catalyst content of raw material slurry oil: 1.0%, asphalt content 1.5%; The gaseous tension that blowback is washed is 0.6MPa; The temperature of cleaning operation is 260 ℃; Filter cake pressure reduction: 0.35MPa.
This experiment: slurry oil studies on asphaltene content analysis method: adopt national standard analytical procedure SYT7550-2004; The analytical procedure of catalyst content in slurry oil: grey point-score.
From table, can obviously find out, the final slurry oil cleaner liquid residual catalyst content obtaining is all less than 0.01%, substantially reaches below 0.005%, and asphalt content is less than or equal to 0.02%, substantially reaches below 0.016%, and effect is very obvious.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; in order to make those skilled in the art can better understand this patent content; should not be understood as the restriction to this patent protection domain; so long as disclose spiritual do any according to this patent, be equal to change or modify, all falling into this patent protection domain.
Claims (7)
1. a device for separating residue from catalytically cracked oil, is characterized in that, comprises
At least two groups are connected in series the filter set forming with fine filter by prefilter;
One bottom that is connected to described prefilter and described fine filter is for the filter cake tank of the wash oil after being installed with filter cake after peeling off and cleaning;
The bottom of described prefilter is equipped with a stock oil slurry inlet and wash oil import, and the bottom of described fine filter is equipped with the wash oil import for filter rinsed filter core; The top of described fine filter is provided with the outlet of slurry oil cleaner liquid; The top of described prefilter and described fine filter is equipped with the backwash gas import of washing operation for carrying out filter-core back-flushing;
The filter core of described prefilter is to carve shaped metal to be wound around silk filter core, and the filtering accuracy scope of described filter core is 2～10 microns;
The filter core of described fine filter is asymmetric metal powder sintered microfiltration membrane filter core, and the filtering accuracy scope of described filter core is 0.2～1.0 micron;
Described filter set filtration temperature scope is 250～350 ℃, and filter pressure is 0.5～1.2Mpa; The default maximal pressure of described filter set is poor is 0.20～0.35MPa, and described backwashing pressure is 0.3～0.6Mpa, and back flushing temperature range is 200～320 ℃.
2. the device of separating residue from catalytically cracked oil according to claim 1, is characterized in that,
Described filter set is the first filter set and the second filter set, when the prefilter of the first filter set or the filtration pressure difference of fine filter reach default maximal pressure poor after, the first filter set stops slurry oil filtration, the stock oil slurry inlet of the second filter set is opened and is carried out filter operation, the backwash gas of certain pressure is oppositely introduced the first filter set its filter element is carried out to back flushing, and filter cake is peeled off from its filter element.
3. the device of separating residue from catalytically cracked oil according to claim 1, is characterized in that,
Described filter set filtration temperature scope is 270～300 ℃, and filter pressure is 0.7～1.0Mpa.
4. the device of separating residue from catalytically cracked oil according to claim 1, is characterized in that, described slurry oil cleaner liquid residual catalyst content is less than 0.01%, and asphalt content is less than 0.02%.
5. a method that adopts device separating residue from catalytically cracked oil described in the arbitrary claim of claim 1 to 4, is characterized in that, comprises following processing step:
(a) the first filter set pre-filtering: the prefilter of the first filter set carries out pre-filtering to raw material slurry oil, filters out granules of catalyst and the bituminous matter of volume particle size in raw material slurry oil;
(b) the first filter set essence is filtered: the fine filter of the first filter set filters again to slurry oil after pre-filtering, and the granules of catalyst of the small grain size in slurry oil after pre-filtering and bituminous matter are filtered out and obtain slurry oil cleaner liquid;
When the prefilter of the first filter set or the filtration pressure difference of fine filter reach set(ting)value, the first filter set stops slurry oil and filters, the second filter set is carried out pre-filtering, essence filtration to slurry oil, prefilter and fine filter that the backwash gas of certain pressure is oppositely introduced the first filter set carry out back flushing to its filter element, and filter cake is peeled off from described filter element; When the prefilter of the second filter set or the filtration pressure difference of fine filter reach set(ting)value, the second filter set stops slurry oil and filters, the first filter set again to slurry oil carry out pre-filtering, essence is filtered, and makes the first filter set, the second filter set hocket filter operation, backwash operation.
6. the method for separating residue from catalytically cracked oil according to claim 5, is characterized in that,
Described filter cake, after described filter element is peeled off, adopts wash oil to clean described filter element.
7. the method for separating residue from catalytically cracked oil according to claim 5, is characterized in that,
Filter cake after described filter element is peeled off, is discharged into filter cake tank with together with wash oil after cleaning described filter element.
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| CN102477309A (en) * | 2011-10-26 | 2012-05-30 | 北京中天元环境工程有限责任公司 | Filtering method of solid-liquid slurry |
| CN102649913B (en) * | 2012-04-19 | 2014-06-04 | 中国石油大学(华东) | Method for removing catalyst from catalytic cracking oil slurry |
| CN102888244B (en) * | 2012-10-22 | 2015-07-15 | 北京金海畅能源投资有限公司 | Production method of ship fuel oil |
| CN103865571B (en) * | 2012-12-10 | 2015-09-09 | 品孚罗特过滤设备（北京）有限公司 | The slurry oil filtering system of catalytic cracking unit |
| US9352971B2 (en) * | 2013-06-14 | 2016-05-31 | Rec Silicon Inc | Method and apparatus for production of silane and hydrohalosilanes |
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