CN209652246U - A kind of heavy aromatics decarburization lighting process change device - Google Patents
A kind of heavy aromatics decarburization lighting process change device Download PDFInfo
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- CN209652246U CN209652246U CN201920330777.2U CN201920330777U CN209652246U CN 209652246 U CN209652246 U CN 209652246U CN 201920330777 U CN201920330777 U CN 201920330777U CN 209652246 U CN209652246 U CN 209652246U
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Abstract
Disclosed by the utility model is a kind of heavy aromatics decarburization lighting process change device, heavy aromatics feed-stock pipeline including connection reformer or pyrolysis gasoline hydrogenation device, heavy aromatics feed-stock pipeline is communicated with residual oil weight-lightening feeding line, residual oil weight-lightening feeding line, which collects, is communicated with feed surge tank, gas phase volatilization line is provided in feed surge tank, feed surge pot bottom is communicated with radiation feed pump, radiation feed pump has been sequentially communicated heating furnace, coke drum, delayed coker fractionator, feed surge tank top is connected to delayed coker fractionator, the cycle of operation shortens, low energy consumption；Fraction oil yield can be increased production, hydrogenating materials can be increased production, naphtha can be increased production, increased production hydrogenating materials.
Description
Technical field
The utility model relates to a kind of process change devices, more specifically say, are related to a kind of heavy aromatics decarburization lighting
Process change device belongs to petrochemical industry production field.
Background technique
Heavy aromatics generally refer to catalytic reforming, disproportionation, isomerization reaction generation oil and cracking of ethylene hydrogasoline in it is secondary
The mono- bicyclic alkyl aromatic hydrocarbons of C9, C10 of production, complicated components are difficult to be kept completely separate.General heavy aromatics is mainly derived from benzene dress processed
It sets, heavy aromatics yield about 30t/h.Currently, the outlet of heavy aromatics are as follows: a small amount of heavy aromatics of a. is sold after mixing with C9, C10；b.
Most of heavy aromatics is mixed with diesel oil, wax oil as hydro-upgrading raw material.The heavy aromatics of benzene production equipment removes hydro-upgrading freshening, i.e.,
Heavy aromatics is mixed with diesel oil, wax oil raw material, by hydro-upgrading raw material filter into raw material surge tank, is entered after mixing with hydrogen
One section, second stage reactor reaction enters stripper and isolates heavy naphtha, as reformer feed after reaction.It has the disadvantage in that
A. heavy aromatics causes certain impact to raw material filter, frequently, sump oil yield increases for backwash into hydro-upgrading unit；B. right
The toxic effect of catalyst for hydro-upgrading, influences the performance of catalyst；C. heavy aromatics does not largely convert downstream reformer,
It is then return to benzene production equipment, is so recycled, energy consumption is increased.In order to alleviate the contradiction that heavy aromatics product yield is high, outlet is few, by portion
Divide heavy aromatics freshening to residual oil weight-lightening device, this technology is there is not yet document report.Residual oil weight-lightening is important petroleum
Secondary operation means, it is to make raw material at 496~500 DEG C of temperature, and pressure is under 0.16~0.20MPa, by cracking, being condensed
Based on series of chemical, be converted to dry gas, liquefied gas, the production of the products such as gasoline, diesel oil, wax oil and petroleum coke
Journey.
Utility model content
In order to solve above-mentioned prior art problem, the utility model provides the shortening of the tool cycle of operation, has volume increase distillate to receive
Rate increases production hydrogenating materials, a kind of heavy aromatics decarburization lighting process change device of the technical characterstics such as volume increase naphtha.
To achieve the goals above, the utility model is achieved through the following technical solutions:
A kind of heavy aromatics decarburization lighting process change device, including connection reformer or pyrolysis gasoline hydrogenation device
Heavy aromatics feed-stock pipeline, the heavy aromatics feed-stock pipeline are communicated with residual oil weight-lightening feeding line, the residual oil weight-lightening charging
Pipeline, which collects, is communicated with feed surge tank, and gas phase volatilization line, the feed surge pot bottom are provided in the feed surge tank
Be communicated with radiation feed pump, the radiation feed pump has been sequentially communicated heating furnace, coke drum, delayed coker fractionator, it is described into
It is connected at the top of material surge tank with delayed coker fractionator.
As an improvement the heating furnace includes several boiler tubes, the boiler tube is communicated with the pipeline of conveying steam.
As an improvement the pressure in the pipeline of the steam is 3.0-4.0MPa.
As an improvement circulation has 45-55 DEG C of heavy aromatics, the residual oil lightweight in the heavy aromatics feed-stock pipeline 1
Change the decompression residuum that circulation in feeding line has 250-350 DEG C.
As an improvement the furnace temp is 450-550 DEG C.
As an improvement the heating furnace is connected to coke drum bottom, the coke drum top and delayed coking are fractionated
Tower connection.
The utility model has the advantages that the cycle of operation shortens, low energy consumption；Fraction oil yield can be increased production, hydrogenating materials can be increased production, it can be with
Increase production naphtha；Using coking furnace high flow rate, steam turbulence state is injected, is avoided in heating-furnace tube reaction coking, realization is prolonged
Cracking, condensation, decarburizing reaction occurs to coke drum late, has increased production hydrogenating materials, the condensed-nuclei aromatics protection for being stripped of easy coking adds
Coke precursor in heavy aromatics is reacted green coke, avoids heavy aromatics directly into adding hydrogen by hydrogen catalyst by cracking condensation reaction
Device causes catalyst carbon deposition.
Detailed description of the invention
Fig. 1 is the utility model heavy aromatics decarburization lighting process change apparatus structure schematic diagram.
Specific embodiment
Below in conjunction with Figure of description, the utility model is described in further detail, but the utility model be not limited to
Lower embodiment.
It is as shown in Figure 1 a kind of specific embodiment of heavy aromatics decarburization lighting process change device, a kind of heavy aromatics is de-
Carbon lighting process change device, the heavy aromatics feed-stock pipeline 1 including connection reformer or pyrolysis gasoline hydrogenation device are described
Heavy aromatics feed-stock pipeline 1 is communicated with residual oil weight-lightening feeding line 2, the residual oil weight-lightening feeding line 2 collect be communicated with into
Expect surge tank 3, gas phase volatilization line is provided in the feed surge tank 3,3 bottom of feed surge tank is communicated with radiation charging
Pump 4, the radiation feed pump 4 has been sequentially communicated heating furnace 5, coke drum 6, delayed coker fractionator 7, the feed surge tank 3
Top is connected to delayed coker fractionator 7；
Heavy aromatics refers to that molecular weight is greater than the COMPLEX MIXED aromatic hydrocarbons of dimethylbenzene, is mainly derived from and reforms heavy aromatics and cracking
Gasoline heavy aromatics is one kind with C9 aromatic hydrocarbons COMPLEX MIXED aromatic hydrocarbons as main component, and heavy aromatics shares 100 various ingredients, each group
The content divided is different with the difference of working process parameter, but main component and changes of contents are little, wherein inclined the three of about 40%
Toluene, 30% ethyl methyl benzene and mesitylene and durol, residual oil weight-lightening are the chemistry of a kind of thermal decomposition and condensation
Reaction is the process of organic substance carbonization zoom；
Utilize utility model device operating method process are as follows: heavy aromatics and residual oil weight-lightening in heavy aromatics feed-stock pipeline 1
Enter feed surge tank 3 after decompression residuum mixing in feeding line 2, gas phase volatilization line is provided in feed surge tank 3, is passed through
Feed surge tank 3 flashes off the component before 300 DEG C, it is therefore prevented that high-temperature feeding radiation pump 4 evacuates, while also avoiding light component
Fraction oil yield is utmostly increased production in cracking, after feed pump 4 boosts via radiation, send and enters after being heated to 500 DEG C to heating furnace 5
Using delayed coking green coke principle cracking, condensation reaction occur in coke drum 6 for coke drum 6 in the environment of high temperature, low pressure, raw
At dry gas, liquefied gas, diesel oil, wax oil and coke, heavy aromatics decarburization lighting process change is realized, it is anti-by cracking condensation
It answers, coke precursor in heavy aromatics is reacted into green coke, heavy aromatics is avoided and directly causes catalyst carbon deposition into hydrogenation plant, is run
Cycle time.
As an improvement embodiment, the heating furnace 5 includes several boiler tubes, and the boiler tube is communicated with conveying steam
Pipeline, the steam injected in boiler tube improves flow velocity, in turbulent flow state, prevents heavy aromatics from sending out in 5 boiler tube of heating furnace
Life is reacted and coking and blocking boiler tube.
As an improvement embodiment, the pressure in the pipeline of the steam is 3.0-4.0MPa, preferably 3.5MPa,
3.5MPa steam improves flow velocity, in turbulent flow state, prevents that heavy aromatics from reacting in 5 boiler tube of heating furnace and coking is stifled
Fill in boiler tube.
As an improvement embodiment, circulation has 45-55 DEG C of heavy aromatics in the heavy aromatics feed-stock pipeline 1, preferably
50 DEG C of heavy aromatics, the interior circulation of the residual oil weight-lightening feeding line 2 have 250-350 DEG C of decompression residuum, preferably 300 DEG C decompressions
Residual oil, 50 DEG C of heavy aromatics and 300 DEG C of decompression residuum enter feed surge tank 3 after being sufficiently mixed, gas phase is arranged in feed surge tank 3
Volatilize line, and the light component in heavy aromatics is sufficiently flashed, it is therefore prevented that high-temperature feeding radiates pump depletion, reduces energy consumption, weight virtue
About 280 DEG C of temperature after hydrocarbon is mixed with decompression residuum are sent into heating furnace 5 by the radiation pressurization of feed pump 4 and are heated to 500 DEG C or so,
Using coking furnace high flow rate, 3.5MPa steam turbulence state is injected, is avoided in heating-furnace tube reaction coking.
As an improvement embodiment, 5 temperature of heating furnace be 450-550 DEG C, preferably 500 DEG C.
As an improvement embodiment, the heating furnace 5 is connected to 6 bottom of coke drum, 6 top of coke drum with prolong
Slow coking fractional distillation column 7 is connected to, convenient for efficiently realizing heavy aromatics decarburization lighting process change.
Finally it should be noted that the utility model is not limited to above embodiments, there can also be many variations.This field
The those of ordinary skill's all deformations that directly can export or associate from content disclosed by the utility model, be considered as
The protection scope of the utility model.
Claims (6)
1. a kind of heavy aromatics decarburization lighting process change device, the weight including connection reformer or pyrolysis gasoline hydrogenation device
Aromatic hydrocarbons feed-stock pipeline (1), it is characterised in that: the heavy aromatics feed-stock pipeline (1) is communicated with residual oil weight-lightening feeding line (2),
The residual oil weight-lightening feeding line (2), which is collected, to be communicated with feed surge tank (3), is provided with gas in the feed surge tank (3)
Mutually volatilization line, feed surge tank (3) bottom are communicated with radiation feed pump (4), and the radiation feed pump (4) has been sequentially communicated
Heating furnace (5), coke drum (6), delayed coker fractionator (7), feed surge tank (3) top and delayed coker fractionator
(7) it is connected to.
2. a kind of heavy aromatics decarburization lighting process change device according to claim 1, it is characterised in that: the heating
Furnace (5) includes several boiler tubes, and the boiler tube is communicated with the pipeline of conveying steam.
3. a kind of heavy aromatics decarburization lighting process change device according to claim 2, it is characterised in that: the steaming
Pressure in the pipeline of vapour is 3.0-4.0MPa.
4. a kind of heavy aromatics decarburization lighting process change device according to claim 1 or 2 or 3, it is characterised in that: institute
The heavy aromatics that circulation in heavy aromatics feed-stock pipeline (1) has 45-55 DEG C is stated, there is circulation in the residual oil weight-lightening feeding line (2)
250-350 DEG C of decompression residuum.
5. a kind of heavy aromatics decarburization lighting process change device according to claim 4, it is characterised in that: the heating
Furnace (5) temperature is 450-550 DEG C.
6. a kind of heavy aromatics decarburization lighting process change device according to claim 1, it is characterised in that: the heating
Furnace (5) is connected to coke drum (6) bottom, is connected at the top of the coke drum (6) with delayed coker fractionator (7).
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| CN201920330777.2U CN209652246U (en) | 2019-03-15 | 2019-03-15 | A kind of heavy aromatics decarburization lighting process change device |
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| CN201920330777.2U CN209652246U (en) | 2019-03-15 | 2019-03-15 | A kind of heavy aromatics decarburization lighting process change device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114507546A (en) * | 2021-11-25 | 2022-05-17 | 宁波中金石化有限公司 | Inferior heavy oil processing method |
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2019
- 2019-03-15 CN CN201920330777.2U patent/CN209652246U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114507546A (en) * | 2021-11-25 | 2022-05-17 | 宁波中金石化有限公司 | Inferior heavy oil processing method |
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