CN103933752B - Carbon four separator C5 mixture piece-rate system - Google Patents
Carbon four separator C5 mixture piece-rate system Download PDFInfo
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- CN103933752B CN103933752B CN201410188661.1A CN201410188661A CN103933752B CN 103933752 B CN103933752 B CN 103933752B CN 201410188661 A CN201410188661 A CN 201410188661A CN 103933752 B CN103933752 B CN 103933752B
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Abstract
The present invention relates to a kind of carbon four separator C5 mixture piece-rate system.Mainly solve C5 mixture that existing carbon four separator existed in prior art takes the mode of shutdown process to remove to assemble in device thus reduce the output of butylene product and the problem of aggrandizement apparatus energy consumption.It is characterized in that: described stripper (1) is connected at the bottom of decarburization five tower (2) tower by tower bottom tube line, tower bottom tube line is connected to tower reactor feeding engine (6); Stripping tower top place extracts pipeline out and is connected to charging aperture in the middle part of decarburization five tower tower, decarburization five column overhead connects return tank (4), decarburization five tower top flows out on pipeline and is connected to tower top cooler (3), decarburization five column overhead inflow line is connected to reflux pump (5), the decarburization five column overhead inflow line of reflux pump front portion is connected to carbon five and extracts pipeline (7) out.This carbon four separator C5 mixture piece-rate system, can when not stopping work in handle assembly C5 mixture removing, reduce plant energy consumption.
Description
Technical field
The present invention relates to a kind of mixture piece-rate system in petrochemical industry, particularly a kind of carbon four separator C5 mixture piece-rate system.
Background technology
Petrochemical industry carbon four separator is used to the device of separating butane and butene mixture (i.e. C 4 mixture), and target product is butylene.The domestic extraction rectifying method that mostly adopts is separated butylene and butane at present, adopts MEK to be separated mixing carbon four technology with n-formyl sarcolysine morpholide mixed extractant solvent.In domestic C 4 mixture, the content of C5 mixture is mostly about 0.02%, and with 500,000 tons/year of C 4 mixture process gauge, C5 mixture assembles total amount every year in a device at about 100 tons.After long-play, a certain amount of C5 mixture brought into along with carbon four raw material is assembled in butylene and separated from solvent tower, and the tower top control temperature of butylene and separated from solvent tower is 45 DEG C, pressure 3.6bar(gauge pressure).And C5 mixture boiling point is at this pressure 50 ~ 100 DEG C, therefore this mixture at carbon four separator except not going, gather a certain amount of after, can only stop charging carry out steaming tower by C5 mixture tower top distillate mouth get rid of, more again charging run.A certain amount of C5 mixture assembled by carbon four separator, and seriously can reduce the selective of solvent, incessantly, overhead product purity is defective, wastes a large amount of energy consumption simultaneously, and also will stop work processes for Liquid level at the bottom of tower.
Summary of the invention
Technical problem to be solved by this invention overcomes C5 mixture that existing carbon four separator existed in background technology takes the mode of shutdown process to remove to assemble in device thus reduces the output of butylene product and the problem of aggrandizement apparatus energy consumption, and a kind of carbon four separator C5 mixture piece-rate system is provided, this carbon four separator C5 mixture piece-rate system, can when not stopping work in handle assembly C5 mixture removing, add the annual production of butylene product, reduce plant energy consumption.
The present invention solves its problem and reaches by following technical scheme: this carbon four separator C5 mixture piece-rate system, comprises stripper, and stripper is connected at the bottom of decarburization five tower tower by tower bottom tube line, and stripper tower bottom tube line is connected to tower reactor feeding engine; Stripper overhead place extracts pipeline out and is connected to charging aperture in the middle part of decarburization five tower tower, decarburization five column overhead connects return tank, decarburization five column overhead flows out on pipeline and is connected to tower top cooler, decarburization five column overhead inflow line is connected to reflux pump, the decarburization five column overhead inflow line of reflux pump front portion is connected to carbon five and extracts pipeline out.
It is 30 ~ 35 DEG C under the boiling point normal pressure of the various components in assay C5 mixture, in pressure 3.6bar(gauge pressure) under be 50 ~ 100 DEG C, assemble in the middle and upper part of butylene and separated from solvent tower as calculated, therefore be that 75 ~ 80 DEG C of places arrange a survey line outlet port in tower wall temperature, distill in C5 mixture and extractant (under normal pressure boiling point 80 ~ 240 DEG C) intermittent discharge to atmospheric tower carried under one's arms on a small quantity, tower pressure is pressure-fired, tower top temperature controls at 50 ~ 52 DEG C, tower top is got rid of C5 mixture and is delivered to tank field, extractant at the bottom of tower sends butylene and separated from solvent tower recycling back to.
The present invention can have following beneficial effect compared with above-mentioned background technology: this carbon four separator C5 mixture piece-rate system is owing to adopting above-mentioned flow process, be that 75 ~ 80 DEG C of place's tower top the 35th layer of tower trays arrange a side line outlet port in stripper tower wall temperature, distill in C5 mixture and extractant (under normal pressure boiling point 80 ~ 240 DEG C) intermittent discharge to atmospheric tower carried under one's arms on a small quantity, tower pressure is pressure-fired, tower top temperature controls at 50 ~ 52 DEG C, tower top is got rid of C5 mixture and is delivered to tank field, and extractant at the bottom of tower sends butylene and separated from solvent tower recycling back to.C5 mixture carbon four separator gather a certain amount of after, to stop work discharge without device, can liquid level at the bottom of control tower, stabilize production; Ensure product purity, reduce energy consumption.
accompanying drawing illustrates:
Accompanying drawing 1 is structural representation of the present invention.
In figure: 1-stripper, 2-decarburization five tower, 3-tower top cooler, 4-return tank, 5-reflux pump, 6-tower reactor feeding engine, 7-carbon five extracts pipeline out.
detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, this carbon four separator C5 mixture piece-rate system, comprises stripper 1, has 106 layers of tower tray, and stripper 1 is connected at the bottom of atmospheric tower decarburization five tower 2 tower by tower bottom tube line, and stripper 1 tower bottom tube line is connected to tower reactor feeding engine 6; Stripper 1 tower top the 35th layer of tower tray place extracts pipeline out and is connected to charging aperture in the middle part of decarburization five tower 2 tower, decarburization five tower 2 tower top connects return tank 4, decarburization five tower 2 tower top flows out on pipeline and is connected to tower top cooler 3, decarburization five tower 2 overhead reflux pipeline is connected to reflux pump 5, the decarburization five tower 2 overhead reflux pipeline of reflux pump 5 front portion is connected to carbon five and extracts pipeline 7 out; Described stripper 1 tower top the 35th layer of tower tray place tower wall temperature is 75 ~ 80 DEG C; Boiling point 80 ~ 240 DEG C under described decarburization five tower 2 charging normal pressure; Decarburization five tower 2 tower pressure is pressure-fired, and pressure is 0.01-0.02Mpa, and tower top temperature controls at 50 ~ 52 DEG C.
This carbon four separator C5 mixture piece-rate system technological process: when stripper 35 layers of tray temperature rise to 70-80 DEG C, extracts solvent out from stripper 35 layers of tower tray and delivers to charging aperture in the middle part of decarburization five tower.Utilize principles of rectification tower top temperature to control at 50 ~ 52 DEG C, pressure is 0.01Mpa, and carbon containing 5 95%, MEK 3%, other components of 2% distillate from tower top and cool the temperature to 30 DEG C through tower top cooler.A part sends top of tower back to as backflow, and residue C5 mixture is delivered to battery limit (BL) and taken out as product.N-formyl sarcolysine morpholide at the bottom of tower and MEK (content >=99wt%) are delivered to bottom stripper with feeding engine at the bottom of tower and are recycled.Column bottom temperature is 85 DEG C, and at the bottom of tower, heat is provided by tower bottom reboiler.
When this carbon four separator C5 mixture piece-rate system is run, it is 30 ~ 35 DEG C under the boiling point normal pressure of the various components in assay stripper 1 in C5 mixture, in pressure 3.6bar(gauge pressure) under be 50 ~ 100 DEG C, butylene and solvent are assembled in the middle and upper part of stripper knockout tower as calculated, therefore be that 75 ~ 80 DEG C of place's tower top the 35th layer of tower trays arrange a side line outlet port in stripper 1 tower wall temperature, C5 mixture and the extractant (under normal pressure boiling point 80 ~ 240 DEG C) carried under one's arms on a small quantity are disposed to decarburization five tower distill, tower pressure is pressure-fired 0.01-0.02Mpa, tower top temperature controls at 50 ~ 52 DEG C, tower top get rid of C5 mixture carbon containing 5 95%, MEK 3%, other 2%, deliver to tank field, extractant at the bottom of tower sends butylene and separated from solvent tower recycling back to.
Carbon four separator of 500000 tons/year, after application C5 mixture piece-rate system, can improve butylene output 8000 tons every year on average, can be enterprise's wound effect 8,000,000 yuan every year.
Claims (1)
1. the separation method of C5 mixture in carbon four separator, it is characterized in that: the piece-rate system of employing comprises stripper (1), have 106 layers of tower tray, stripper (1) is connected at the bottom of decarburization five tower (2) tower by tower bottom tube line, and stripper (1) tower bottom tube line is connected to tower reactor feeding engine (6); Stripper (1) tower top the 35th layer of tower tray place extracts pipeline out and is connected to charging aperture in the middle part of decarburization five tower (2) tower, decarburization five tower (2) tower top connects return tank (4), decarburization five tower (2) tower top flows out on pipeline and is connected to tower top cooler (3), decarburization five tower (2) overhead reflux pipeline is connected to reflux pump (5), decarburization five tower (2) the overhead reflux pipeline that reflux pump (5) is anterior is connected to carbon five and extracts pipeline (7) out; Described stripper (1) tower top the 35th layer of tower tray place tower wall temperature is 75 ~ 80 DEG C; Boiling point 80 ~ 240 DEG C under described decarburization five tower (2) charging normal pressure; Decarburization five tower (2) tower pressure is pressure-fired, and pressure is 0.01-0.02MPa, and tower top temperature controls at 50 ~ 52 DEG C;
Separation method is: when stripper 35 layers of tray temperature rise to 70-80 DEG C, extract solvent out from stripper 35 layers of tower tray and deliver to charging aperture in the middle part of decarburization five tower, principles of rectification tower top temperature is utilized to control at 50 ~ 52 DEG C, pressure is 0.01MPa, carbon containing 5 95%, MEK 3%, other components of 2% distillate from tower top and cool the temperature to 30 DEG C through tower top cooler, a part sends top of tower back to as backflow, residue C5 mixture is delivered to battery limit (BL) and is taken out as product, at the bottom of n-formyl sarcolysine morpholide at the bottom of tower and MEK tower, feeding engine is delivered to bottom stripper and is recycled, column bottom temperature is 85 DEG C, at the bottom of tower, heat is provided by tower bottom reboiler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410188661.1A CN103933752B (en) | 2014-05-07 | 2014-05-07 | Carbon four separator C5 mixture piece-rate system |
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| CN201410188661.1A CN103933752B (en) | 2014-05-07 | 2014-05-07 | Carbon four separator C5 mixture piece-rate system |
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| CN103933752A CN103933752A (en) | 2014-07-23 |
| CN103933752B true CN103933752B (en) | 2016-02-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969196A (en) * | 1963-04-16 | 1976-07-13 | Studiengesellschaft Kohle M.B.H. | Process for the separation of mixtures of substances |
| CN101402553A (en) * | 2008-11-16 | 2009-04-08 | 岳阳桦科化工有限责任公司 | Method for producing high purity MTBE with C4 and methanol |
| CN102557853A (en) * | 2011-12-22 | 2012-07-11 | 烟台大学 | Method for preparing high-purity isobutane, n-butane and butene from mixed carbon 4 |
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2014
- 2014-05-07 CN CN201410188661.1A patent/CN103933752B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969196A (en) * | 1963-04-16 | 1976-07-13 | Studiengesellschaft Kohle M.B.H. | Process for the separation of mixtures of substances |
| CN101402553A (en) * | 2008-11-16 | 2009-04-08 | 岳阳桦科化工有限责任公司 | Method for producing high purity MTBE with C4 and methanol |
| CN102557853A (en) * | 2011-12-22 | 2012-07-11 | 烟台大学 | Method for preparing high-purity isobutane, n-butane and butene from mixed carbon 4 |
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Inventor after: Xu Zhanjiu Inventor after: Li Xiang Inventor after: Liu Junsheng Inventor after: Huang Zhenjun Inventor after: Meng Fanjun Inventor before: Xu Zhanjiu Inventor before: Li Xiang |
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