CN201291075Y - High-efficiency environmental-protection methanol pre-rectifying device - Google Patents
High-efficiency environmental-protection methanol pre-rectifying device Download PDFInfo
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- CN201291075Y CN201291075Y CNU200820220454XU CN200820220454U CN201291075Y CN 201291075 Y CN201291075 Y CN 201291075Y CN U200820220454X U CNU200820220454X U CN U200820220454XU CN 200820220454 U CN200820220454 U CN 200820220454U CN 201291075 Y CN201291075 Y CN 201291075Y
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- rectifying
- scrubbing tower
- scrubbing
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Abstract
The utility model discloses high-efficiency and environment-protective methanol pre-distillation equipment, which mainly comprises a pre-distillation tower (1), a condenser, a reflux trough, a reflux pump and a washing tower (4). A non-condensable gas inlet at the middle-lower part of the washing tower is connected with the non-condensable gas discharge pipe of a pre-distillation tower secondary condenser (1.2) through a pipeline; a washing tower bypass valve (2) is arranged between the non-condensable gas discharge pipe and a gas discharge pipe at the top of the washing tower; the gas discharge pipe at the top of the washing tower is connected with a flare stack; an automatic regulating valve (3) is arranged on the flare stack connected with the gas discharge pipe; a washing liquid inlet on the washing tower is connected with the soft water main pipe (5) of a distillation equipment area through a pipeline; and a liquid outlet pipeline at the bottom of the washing tower is connected with a pre-distillation tower reflux trough (1.3) and the soft water main pipe through a detergent circulator (6). The methanol pre-distillation equipment has the advantages that the equipment is simple, the operability is strong, and the non-condensable gas of the pre-distillation tower is washed and the methanol in the non-condensable gas is recovered through the washing tower.
Description
Technical field
The utility model relates to the methanol rectification technical field, especially relates to a kind of pre-rectifying device of methyl alcohol of high-efficiency environment friendly.
Background technology
Methyl alcohol is a kind of very important basic chemical raw materials; also be a kind of clear energy sources and power fuel of function admirable; on current globalization chemical product market, play a part very important; rectifying is the important procedure of methanol production; be directly connected to the problems such as quality, environmental protection, energy consumption and production cost of methyl alcohol, its energy consumption accounts for about 20% of methanol production total energy consumption.Rectification cell in the existing methanol rectifying system of China is divided into single-action (double tower), economic benefits and social benefits (three towers) distillation process substantially, economic benefits and social benefits technology is compared with single-action technology, can reduce energy consumption about 30%, it is the rectification process that generally adopts at present, in technological process, the pre-rectifying tower overhead vapours is partial condensation in the pre-rectifying tower first-stage condenser, the first-stage condenser on-condensible gas enters and continues cooling in the pre-rectifying tower secondary condenser, secondary condenser fixed gas majority is that the gas that acts as a fuel is burnt, and it is by the direct burning and exhausting of torch that small part is also arranged.But it is not enough that these two kinds of fixed gas processing methods exist: because the main component of pre-tower fixed gas is CO
2And CH
3OH, the about 40kcal/Nm of its calorific value
3, calorific value is very low, does not have value as fuel gas; Methanol content in the pre-tower fixed gas is about about 25%, as the directly discharging of dropping a hint, a part of methyl alcohol is walked by the discharging band of gas, causes very big waste, and the methyl alcohol that is pulled away condensation in flare stack assembles, and blocks the torch pipeline, forms potential safety hazard.
Summary of the invention
For addressing the above problem, the pre-rectifying device of methyl alcohol that the purpose of this utility model provides a kind of high-efficiency environment friendly by setting up a scrubbing tower, washs the pre-rectifying tower fixed gas, and makes and contain pure cleaning solution and return and continue rectifying in the pre-rectifying tower.
For achieving the above object, the utility model adopts following technical scheme:
The pre-rectifying device of the methyl alcohol of described high-efficiency environment friendly, it mainly comprises pre-rectifying tower, condenser, backflash, reflux pump, also comprise a scrubbing tower, the fixed gas import of scrubbing tower tower body middle and lower part is connected with the fixed gas delivery pipe of pre-rectifying tower secondary condenser by pipeline, be provided with the scrubbing tower bypass valve between the blast pipe of fixed gas delivery pipe and scrubbing tower cat head, the blast pipe of scrubbing tower cat head is connected with flare stack, is provided with automatic regulating valve with flare stack after blast pipe is connected; Cleaning solution import on the scrubbing tower tower body is connected with the soft water house steward in rectifying device district by pipeline; Drain pipe at the bottom of the washing Tata is connected with pre-rectifying tower backflash, soft water house steward respectively by detergent circulator.
The pre-rectifying device of the methyl alcohol of described high-efficiency environment friendly, its scrubbing tower comprises a tower body, is positioned at fixed gas import and cleaning solution import, the exhaust outlet of cat head and the liquid outlet at the bottom of the tower on the tower body sidewall, the fixed gas import is positioned at the tower body middle and lower part, wire mesh demister, shower nozzle type spray equipment, ripple packing are installed in this scrubbing tower from top to bottom, ripple packing places fixed gas import top, and cleaning solution sprays in shower nozzle by the spray piping of shower nozzle type spray equipment; The tower body bottom is provided with liquid level gauge.
Owing to adopt aforesaid technical scheme, the utlity model has following superiority:
The pre-rectifying device of the methyl alcohol of this high-efficiency environment friendly, equipment is simple, atmospheric operation, strong operability, easy to maintenance, result of use is good; Reclaim the methyl alcohol in the pre-tower fixed gas and be used, save cost, safety and environmental protection has again improved the economic benefit of distillation process.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of scrubbing tower.
Among the figure: the 1-pre-rectifying tower; 1.1-pre-rectifying tower first-stage condenser; 1.2-pre-rectifying tower secondary condenser; 1.3-pre-rectifying tower backflash; 1.4-pre-rectifying tower reflux pump; 2-scrubbing tower bypass valve; The 3-automatic regulating valve; The 4-scrubbing tower; 5-soft water house steward; The 6-detergent circulator; The 7-exhaust outlet; The 8-wire mesh demister; The 9-shower nozzle; The 10-ripple packing; The import of 11-fixed gas; The 12-liquid level gauge; The import of 13-cleaning solution; The 14-guide pipeline; The 15-liquid outlet.
The specific embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is described in further detail:
As shown in fig. 1: the pre-rectifying device of the methyl alcohol of high-efficiency environment friendly of the present utility model, it mainly comprises pre-rectifying tower 1, condenser, backflash, reflux pump, also comprise a scrubbing tower 4, the fixed gas import of scrubbing tower tower body middle and lower part is connected with the fixed gas delivery pipe of pre-rectifying tower secondary condenser 1.2 by pipeline, be provided with scrubbing tower bypass valve 2 between the blast pipe of fixed gas delivery pipe and scrubbing tower 4 cats head, the blast pipe of scrubbing tower cat head is connected with flare stack, is provided with automatic regulating valve 3 with flare stack after blast pipe is connected; Cleaning solution import on scrubbing tower 4 tower bodies is connected with the soft water house steward 5 in rectifying device district by pipeline; Drain pipe at the bottom of scrubbing tower 4 towers is connected with pre-rectifying tower backflash 1.3, soft water house steward 5 respectively by detergent circulator 6, makes recovery liquid at the bottom of scrubbing tower 4 towers deliver to pre-rectifying tower backflash 1.3 or a part by detergent circulator 6 and returns in the scrubbing tower to mix with soft water and recycle as cleaning solution.
When scrubbing tower of the present utility model came into operation, the scrubbing tower bypass valve 2 that is provided with between the blast pipe of fixed gas delivery pipe and scrubbing tower cat head was in closed condition, when scrubbing tower need overhaul, opened the scrubbing tower bypass valve; The automatic regulating valve 3 that is provided with on the flare stack is used for controlling the pressure of pre-distillation system and washing system.
As shown in Figure 2, the pre-rectifying device of the methyl alcohol of described high-efficiency environment friendly, its scrubbing tower comprises a tower body, is positioned at fixed gas import 11 and cleaning solution import 13, the exhaust outlet 7 of cat head and the liquid outlet 15 at the bottom of the tower on the tower body sidewall, the fixed gas import is positioned at the tower body middle and lower part, is provided with the guide pipeline 14 that is communicated with fixed gas import 11 in tower body; Wire mesh demister 8, shower nozzle type spray equipment, ripple packing 10 are installed in this scrubbing tower from top to bottom, and ripple packing 10 places fixed gas guide pipeline 14 tops, and cleaning solution passes through the spray piping of shower nozzle type spray equipment from 9 li ejections of shower nozzle; The tower body bottom is provided with liquid level gauge 12, and liquid level gauge can guarantee the liquid level that wash tower bottoms is stable so that detergent circulator can continous-stable running, liquid phase is formed is kept relative stability.
Above-mentioned ripple packing can adopt acidproof, the corrosion-resistant ripple packing of stainless steel ripple filler or ceramic ripple packing and so on, also can use other acidproof, corrosion resistant chemical filler to replace, as Pall ring filler, rectangular saddle ring filler etc.
Thick methyl alcohol enters pre-rectifying tower 1 after preheating, the pre-rectifying tower overhead vapours is partial condensation in pre-rectifying tower first-stage condenser 1.1, the first-stage condenser on-condensible gas enters and continues cooling in the pre-rectifying tower secondary condenser 1.2, after the secondary condenser fixed gas is discharged from the fixed gas delivery pipe, enter in scrubbing tower 4 tower bodies by pipeline, fixed gas guide pipeline 14; Recovery liquid at the bottom of soft water among the soft water house steward 5 and scrubbing tower 4 towers passes through the spray piping of pipeline, shower nozzle type spray equipment from 9 li ejections of shower nozzle, be sprayed at uniformly on the ripple packing 10, to the fixed gas spray washing in the tower body, the wire mesh demister 8 in the tower body can be eliminated the mist that is entrained in the gas; Can freely adjust the amount of returning of rework solution at the bottom of the addition of soft water and the tower according to the methanol content of rework solution at the bottom of methanol content in the cat head gas phase and the tower, to reach technological requirement.
Because methanol rectification will reach higher quality, must add methanol extraction agent-soft water at the pre-rectifying tower top, improve methyl alcohol and other separate impurities effect with this; And the cleaning solution soft water of introducing in the pre-rectifying device of methyl alcohol of the present utility model has just in time replaced the extractant in the methanol extraction rectifying, can not increase extra energy consumption to equipment, and can improve the economic benefit of distillation process.
Fixed gas is after washing, do not contain the blast pipe of pure gas by the scrubbing tower cat head and enter flare stack, containing pure cleaning solution enters at the bottom of the washing Tata, by after detergent circulator 6 superchargings with pre-rectifying tower one-level, secondary condenser in condensate liquid be mixed into pre-rectifying tower backflash 1.3, return to pre-rectifying tower 1 by pre-rectifying tower reflux pump 1.4; Through the prognosis methyl alcohol that pre-rectifying tower was handled, enter again and carry out rectifying in pressurizing tower, the atmospheric tower, the refined methanol after the rectifying enters in the refined methanol basin.
Claims (2)
1, the pre-rectifying device of a kind of methyl alcohol of high-efficiency environment friendly, mainly comprise pre-rectifying tower (1), condenser, backflash, reflux pump, it is characterized in that: it also comprises a scrubbing tower (4), the fixed gas import of scrubbing tower tower body middle and lower part is connected by the fixed gas delivery pipe of pipeline with pre-rectifying tower secondary condenser (1.2), be provided with scrubbing tower bypass valve (2) between the blast pipe of fixed gas delivery pipe and scrubbing tower (4) cat head, the blast pipe of scrubbing tower cat head is connected with flare stack, is provided with automatic regulating valve (3) with flare stack after blast pipe is connected; Cleaning solution import on scrubbing tower (4) tower body is connected with the soft water house steward (5) in rectifying device district by pipeline; Drain pipe at the bottom of scrubbing tower (4) tower is connected with pre-rectifying tower backflash (1.3), soft water house steward (5) respectively by detergent circulator (6).
2, the pre-rectifying device of the methyl alcohol of high-efficiency environment friendly according to claim 1, it is characterized in that: its scrubbing tower comprises a tower body, is positioned at fixed gas import (11) and cleaning solution import (13), the exhaust outlet (7) of cat head and the liquid outlet (15) at the bottom of the tower on the tower body sidewall, the fixed gas import is positioned at the tower body middle and lower part, is provided with the guide pipeline (14) that is communicated with fixed gas import (11) in tower body; Wire mesh demister (8), shower nozzle type spray equipment, ripple packing (10) are installed in this scrubbing tower from top to bottom, ripple packing (10) places fixed gas guide pipeline (14) top, and cleaning solution sprays from shower nozzle (9) lining by the spray piping of shower nozzle type spray equipment; The tower body bottom is provided with liquid level gauge (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820220454XU CN201291075Y (en) | 2008-10-21 | 2008-10-21 | High-efficiency environmental-protection methanol pre-rectifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820220454XU CN201291075Y (en) | 2008-10-21 | 2008-10-21 | High-efficiency environmental-protection methanol pre-rectifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201291075Y true CN201291075Y (en) | 2009-08-19 |
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ID=41004528
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820220454XU Expired - Fee Related CN201291075Y (en) | 2008-10-21 | 2008-10-21 | High-efficiency environmental-protection methanol pre-rectifying device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524301A (en) * | 2013-10-31 | 2014-01-22 | 神华集团有限责任公司 | Methyl alcohol rectification system and method for recycling methyl alcohol in incondensable gas of system |
| CN104353330A (en) * | 2014-11-25 | 2015-02-18 | 武汉亿维登科技发展有限公司 | Methanol washing tower |
| CN104710281A (en) * | 2015-03-18 | 2015-06-17 | 四川天一科技股份有限公司 | Methanol pre-rectifying tower heating process by utilizing methanol synthetic reaction gas |
| CN104492112B (en) * | 2014-12-17 | 2016-06-22 | 亚太森博（山东）浆纸有限公司 | A kind of process device and method stripping fixed gas |
| CN115400446A (en) * | 2022-08-26 | 2022-11-29 | 河南中鸿集团煤化有限公司 | VOCs gas treatment system of methanol rectifying tower |
-
2008
- 2008-10-21 CN CNU200820220454XU patent/CN201291075Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103524301A (en) * | 2013-10-31 | 2014-01-22 | 神华集团有限责任公司 | Methyl alcohol rectification system and method for recycling methyl alcohol in incondensable gas of system |
| CN103524301B (en) * | 2013-10-31 | 2015-04-22 | 神华集团有限责任公司 | Methyl alcohol rectification system and method for recycling methyl alcohol in incondensable gas of system |
| CN104353330A (en) * | 2014-11-25 | 2015-02-18 | 武汉亿维登科技发展有限公司 | Methanol washing tower |
| CN104492112B (en) * | 2014-12-17 | 2016-06-22 | 亚太森博（山东）浆纸有限公司 | A kind of process device and method stripping fixed gas |
| CN104710281A (en) * | 2015-03-18 | 2015-06-17 | 四川天一科技股份有限公司 | Methanol pre-rectifying tower heating process by utilizing methanol synthetic reaction gas |
| CN115400446A (en) * | 2022-08-26 | 2022-11-29 | 河南中鸿集团煤化有限公司 | VOCs gas treatment system of methanol rectifying tower |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20101021 |