CN1357603A - Method of raising processing capacity in mixed C4 deasphalting extraction tower - Google Patents
Method of raising processing capacity in mixed C4 deasphalting extraction tower Download PDFInfo
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- CN1357603A CN1357603A CN 00135621 CN00135621A CN1357603A CN 1357603 A CN1357603 A CN 1357603A CN 00135621 CN00135621 CN 00135621 CN 00135621 A CN00135621 A CN 00135621A CN 1357603 A CN1357603 A CN 1357603A
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Abstract
The present invention relates to the method of raising processing capacity in mixed C4 deasphalting extraction tower. The present invention uses extraction-coalescing board stuffing tower, i.e., it has in its extracting section ZUPAC2 extracting stuffing and in its deposition section NPPAC2 coalescing board stuffing, or has in its extraction section ZUPAC1 extracting stuffing and ZUPAC2 extracting stuffing from bottom to top. Compared with a sieve plate extracting tower, the present invention has raised processing capacity, high deasphalting quality and unchanged yield.
Description
The present invention relates to improve the method for processing capacity in mixed C 4 deasphalting extraction tower.
With the mixed c 4 is the technology of solvent deasphalting, obtained using widely in petrochemical industry, " mixed c 4 solvent deasphalting novel process " (Research Institute of Petro-Chemical Engineering etc., refining of petroleum, the 8th phase, the 18th～23 page, 1989 years, " refining of petroleum " editorial office publishes) this piece document, announced that mixed c 4 diasphaltene technology is in Oil Refinery, Jinkin Chemical Industry Co., Ltd.'s (former Jilin Chemical Industry Company refinery) applicable cases.Extracting section, the settling section of the extraction tower of this technology all adopt sieve plate, because mass transfer effect is not good, turndown ratio is little, causes back-mixing easily, makes mass transfer and effect of settling undesirable, have influenced expansion, the raising of device processing power; " research of the efficient extraction tower of solvent deasphalting and application " (the 28th the 5th phase of volume, the 25th～28 page, 1998, " oil refining design " editorial office published for Zhu Shenlin, oil refining design) reported the application of honeycomb filler on the propane deasphalting device; Processing power improves 12% than former technology, and does not see the application report of this filler in mixed c 4 diasphaltene extraction tower.
The objective of the invention is to overcome the deficiencies in the prior art, transform former perforated-plate extraction tower as extraction---the coalescing-plate packing tower, to improve the method for processing capacity in mixed C 4 deasphalting extraction tower.
A kind of method that improves processing capacity in mixed C 4 deasphalting extraction tower transform former sieve-tray tower as extraction---the coalescing-plate packing tower, promptly arrange the ZUPAC2 extraction stuffing in this tower extracting section, and arrange NPPAC2 coalescing-plate filler at settling section.
Solvent import to be gone up in the tower, and after the hot solvent circulation, being warming up to tower still temperature is 70～90 ℃, and tower top temperature is 95～110 ℃, when pressure is 3.7～3.9Mpa, and vacuum resid feed reaches the unit time rated value, conditioning agent oil ratio to 5～6: 1 (d
4 20Volume), tower is in extraction, settlement separate process.
The extracting section of tower, settling section are arranged 1 dish ZUPAC2 extraction stuffing, 1 dish NPPAC2 coalescing-plate filler at least respectively in the aforesaid method.
Preceding method, the NPPAC2 coalescing-plate filler of the ZUPAC2 extraction stuffing of tower extracting section, settling section, all sectional is arranged, is the void tower section between the two adjacent segment fillers.
Above-described method, tower extracting section can be arranged the ZUPAC1 extraction stuffing earlier from bottom to top, continues on it and arranges the ZUPAC2 extraction stuffing.
Filler factory of University Of Tianjin ZUPAC1～No. 6 extraction stuffing, NPPAC1～No. 6 coalescing-plate filler that produce and that put on market in the past in 1994, be processed on demand and can be assembled into cylindric packing box, the dish height is 100～200mm (the present invention adopts the 200mm height), in this packing box, form the symmetric regular ramp way of many intersections.The ZUPAC extraction stuffing is a two-directional corrugations, in its crest line upper punch backward-wave pit (see figure 3) is arranged, and NPPAC coalescing-plate filler draws the tiny ripple (see figure 2) identical with the ripple direction on beading.Solvent with vacuum residuum countercurrent flow in above-mentioned ramp way, contact, increased mass transfer area, improved mass-transfer efficiency, and can prevent the drop back-mixing, help sedimentation, effect of settling also is improved, therefore, adopt technical solution of the present invention, can make the device processing power improve about 20%～100% than former perforated-plate extraction tower.
Now, further specify as follows to the method for raising processing capacity in mixed C 4 deasphalting extraction tower of the present invention;
---coalescing-plate packing tower, i.e. liquid below this tower extracting section---liquid distributor top that with original perforated-plate extraction tower, is transformed into extraction is provided with on the packing support plate grid, arranges the ZUPAC2 extraction stuffing.Settling section above the tubular type flute profile sparger on this filler top is provided with on the packing support plate grid, arranges NPPAC2 coalescing-plate filler.Then, through liquid---liquid distributor is evenly distributed on the mixed c 4 solvent in the tower, after the solvent thermal circulation, being warming up to tower still temperature is 70～90 ℃, tower top temperature is 95～110 ℃, when pressure is 3.7～3.9Mpa, vacuum residuum is in tubular type flute profile sparger uniform distribution tower, the unit time inlet amount reaches rated value, the conditioning agent oil ratio ratio of residual oil (solvent with) is 5～6: 1, and extraction---coalescing-plate packing tower is in stable extraction, settlement separate process.
Fig. 1 is that extraction---coalescing-plate packing tower filler is arranged synoptic diagram;
Fig. 2 is a NPPAC2 coalescing-plate filling-material structure synoptic diagram among Fig. 1;
Fig. 3 is ZUPAC1 among Fig. 1～No. 2 extraction stuffing structural representations.
Now, raising mixed c 4 of the present invention is taken off the extraction tower method of processing capacity, is described in detail as follows in conjunction with above accompanying drawing, embodiment, comparative example:
1. embodiment
Referring to accompanying drawing 1～3, the former deasphalting perforated-plate extraction tower of mixed c 4 that is useful on, its tower diameter Φ=3000mm, tower height H=11000mm, with sieve plate in this tower and auxiliary part thereof, all dismounting is down.At the extracting pars infrasegmentalis of this tower, packing support plate grid (lateral error≤0.2%) is housed, on this packing support plate grid, arrange 5 dish ZUPAC1 extraction stuffings 5; Then arrange 23 dish ZUPAC2 extraction stuffings 4 above the filler continuously at this, then filler pressing is placed on the 23rd dish ZUPAC2 extraction stuffing 4; Below above-mentioned packing support plate grid, known liquid is housed---liquid distributor 6, so that mixed c 4 is evenly distributed in the tower; On the top of ZUPAC2 extraction stuffing 4, be provided with the tubular type flute profile sparger 3 that generally adopts at present, in order to grand celebration---Fuyu County's vacuum residuum is evenly distributed in the tower.
In the settling section bottom of tower, be provided with above-mentioned tubular type flute profile sparger 3 tops, be provided with the packing support plate grid, arrange 10 dish NPPAC2 coalescing-plate fillers 2 on it successively continuously, above filler pressing is placed.More than used packing support plate grid, filler pressing is standardized component.
Above-mentioned with former perforated-plate extraction tower, transform extraction as---coalescing-plate packing tower 1, with ZUPAC extraction stuffing and NPPAC2 coalescing-plate filler, intact by the above mounting arrangements, successively to purging in the tower, after pressure testing is qualified, with solvent carbon four through liquid---liquid distributor 6 is evenly distributed in the tower, being warming up to tower still temperature is 70～90 ℃, tower top temperature is 95～110 ℃, when pressure is 3.7～3.9Mpa, with carbon residue is 9.0% (Kang Shi) grand celebration---Fuyu County's vacuum residuum, be evenly distributed in the tower through tubular type flute profile sparger 3, its inlet amount progressively carry to 68.75 tons/time rated value, by processing requirement conditioning agent oil ratio (ratio of mixed c 4 and grand celebration---Fuyu County's vacuum residuum) 5～6: 1 (d
4 20Volume), this tower changes normal extraction, settlement separate process over to, in the ramp way of mixed c 4, grand celebration---Fuyu County's vacuum residuum in above-mentioned ZUPAC and two kinds of cylindric packing boxs of NPPAC, countercurrent flow, fully contact, from vacuum residuum, extract lighter deasphalted oil and solvent and discharge from cat head together, go separation recovery such as overcritical tower; And pitch that removes and partial solvent are discharged at the bottom of tower, and deasphalting evaporator tower, stripping tower further separate after heating.So, the method for raising processing capacity in mixed C 4 deasphalting extraction tower of the present invention improves about 1 times than former perforated-plate extraction tower.
2. comparative example
Original sieve-tray tower (tower diameter Φ=3000mm, tower height H=11000mm) after importing solvent carbon four in, after carrying out hot and cold solvent cycle respectively, being warming up to tower still temperature is 70～90 ℃, tower top temperature is 95～110 ℃, when pressure is 3.7～3.9Mpa, with grand celebration---Fuyu County's vacuum resid feed amount progressively be increased to 25～31.25 tons/time rated value after, adjusting agent-oil ratio is 5～6: 1, tower enters the settlement separate process of normal extraction, and its processing power is 20～250,000 tons of/year grand celebrations---Fuyu County's vacuum residuum.
Now transform former perforated-plate extraction tower as extraction with provided by the invention---the coalescing-plate packing tower, being respectively applied for the mixed c 4 with former sieve-tray tower is solvent, with grand celebration---Fuyu County's vacuum residuum is the solvent deasphalting of raw material, its device processing power is listed following table in, can see from this table, adopt the method for raising processing capacity in mixed C 4 deasphalting extraction tower of the present invention, improve about 1 times than former technology, obtained the technical progress effect that is difficult to expect, made the device energy utilization more reasonable.
| Project | Before the transformation | After the transformation | |
| Tower | Sieve-tray tower | Extraction---coalescing-plate packing tower | |
| The tower specification | Φ＝3000mm | Φ＝3000mm | |
| Solvent | H＝11000mm | H＝11000mm | |
| Raw material | Grand celebration---Fuyu County's vacuum residuum | Grand celebration---Fuyu County's vacuum residuum | |
| Processing condition | Column bottom temperature ℃ | 70～90 | 70～90 |
| Tower top temperature ℃ | 95～110 | 95～110 | |
| Tower top pressure Mpa | 3.7～3.9 | 3.7～3.9 | |
| Agent- | 5～6∶1 | 5～6∶1 | |
| Processing power | Ton/time | 25～31.25 | 68.75 |
| Ten thousand tons/year | 20～25 | 55 | |
| Deasphalted oil | Carbon residue % (wt) | 5.0 | 5.0 |
| Yield % | 88 | 88 | |
Claims (4)
1. method that improves processing capacity in mixed C 4 deasphalting extraction tower, transform former perforated-plate extraction tower as extraction---coalescing-plate packing tower (1), arrange ZUPAC2 extraction stuffing (4) in this tower extracting section, arrange NPPAC2 coalescing-plate filler (2) at settling section, solvent imports in the tower, after the hot solvent circulation, being warming up to tower still temperature is 70～90 ℃, tower top temperature is 95～110 ℃, when pressure is 3.7～3.9Mpa, vacuum resid feed reaches the unit time rated value, and conditioning agent oil ratio (solvent/vacuum residuum) is 5～6: 1 (d
4 20Volume), make tower be in extraction, settlement separate process.
2. method according to claim 1 is characterized in that at tower extracting section, settling section, arranges 1 dish ZUPAC2 extraction stuffing (4), 1 dish NPPAC2 coalescing-plate filler (2) at least respectively.
3. method according to claim 1 is characterized in that the ZUPAC2 extraction stuffing (4) in tower extracting section, the NPPAC2 coalescing-plate filler (2) of settling section, and all sectional is arranged, is the void tower section between each adjacent two sections filler.
4. method according to claim 1 is characterized in that tower extracting section can arrange ZUPAC1 extraction stuffing (5) earlier from bottom to top, continues on it and arranges ZUPAC2 extraction stuffing (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135621 CN1357603A (en) | 2000-12-13 | 2000-12-13 | Method of raising processing capacity in mixed C4 deasphalting extraction tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135621 CN1357603A (en) | 2000-12-13 | 2000-12-13 | Method of raising processing capacity in mixed C4 deasphalting extraction tower |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603457A (en) * | 2012-01-17 | 2012-07-25 | 马俊杰 | Production device and process for generating propylene by utilizing C3 and C4 in liquid gas deep processing |
| CN105524649A (en) * | 2014-10-22 | 2016-04-27 | 中国石油化工股份有限公司 | Inferior residual oil solvent extraction apparatus and processing technology thereof |
| CN112370814A (en) * | 2020-10-29 | 2021-02-19 | 中国石油化工股份有限公司 | Filler extraction tower, application thereof and residual oil solvent deasphalting method |
| CN114907876A (en) * | 2021-02-09 | 2022-08-16 | 中国石油化工股份有限公司 | Method and apparatus for solvent recovery |
-
2000
- 2000-12-13 CN CN 00135621 patent/CN1357603A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102603457A (en) * | 2012-01-17 | 2012-07-25 | 马俊杰 | Production device and process for generating propylene by utilizing C3 and C4 in liquid gas deep processing |
| CN102603457B (en) * | 2012-01-17 | 2014-01-08 | 马俊杰 | Production device and process for generating propylene by utilizing C3 and C4 in liquid gas deep processing |
| CN105524649A (en) * | 2014-10-22 | 2016-04-27 | 中国石油化工股份有限公司 | Inferior residual oil solvent extraction apparatus and processing technology thereof |
| CN105524649B (en) * | 2014-10-22 | 2018-01-16 | 中国石油化工股份有限公司 | A kind of poor residuum solvent extraction plant and its processing technology |
| CN112370814A (en) * | 2020-10-29 | 2021-02-19 | 中国石油化工股份有限公司 | Filler extraction tower, application thereof and residual oil solvent deasphalting method |
| CN114907876A (en) * | 2021-02-09 | 2022-08-16 | 中国石油化工股份有限公司 | Method and apparatus for solvent recovery |
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