CN101496981B - Method for purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil - Google Patents
Method for purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil Download PDFInfo
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- CN101496981B CN101496981B CN2009100137997A CN200910013799A CN101496981B CN 101496981 B CN101496981 B CN 101496981B CN 2009100137997 A CN2009100137997 A CN 2009100137997A CN 200910013799 A CN200910013799 A CN 200910013799A CN 101496981 B CN101496981 B CN 101496981B
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Abstract
The invention provides a method for purifying methyl isobutyl ketone (MIBK) exhaust gas of a vacuum system through utilization of waste air compressor oil and relates to a method for treating industrial organic exhaust gas. The MIBK gas produced in production is difficult to condense and reclaim at negative pressure; mass exhaust gas is discharged by a vacuum pump and enters atmosphere so as to cause serious pollution to environment; and discharged water containing the MIBK brings great difficulty for wastewater treatment. The method modifies a common water ring vacuum pump system and adds an inlet gas distribution pipe in a vacuum buffer tank; the tank is filled with waste air compressor oil; the method adds a circulating water pump and an engine oil saltless water tank; the engine oil saltless water tank is filled with saltless water and the waste air compressor oil; and the inside of the tank is provided with a cooling pipe coil. After the waste air compressor oil and low-temperature water are utilized to absorb the MIBK, gas exhaust of the water ring vacuum pump reaches the requirement of GB16297-1996. The method realizes cyclic utilization of water for the vacuum pump; the saturated waste air compressor oil is absorbed; and the MIBK is reclaimed by a distillation method so that the waste air compressor oil is regenerated.
Description
Technical field
The present invention relates to the processing method of organic exhaust gas in a kind of industrial production, particularly relate to a kind of waste compressor oil that utilizes and absorb vacuum system methyl iso-butyl ketone (MIBK) (MIBK) waste gas, utilize again and distill the method that reclaims MIBK, makes waste compressor oil regeneration.
Background technology
MIBK is widely used as the extractant that antibiotic medicines such as penicillin, 6-amino-penicillanic acid, Tiamulin extract, synthesize, the solvent in the crystallization process as good medium-boiling solvent.Because the antibiotic medicine has stronger thermal sensitivity, medicine extracts, the concentrating of building-up process, and the drying process of crystallization process all is at vacuum state mostly, keeps finishing under the relatively low temperature.Water ring vacuum pump pump drainage gas system commonly used is made up of vacuum buffer tank, water ring vacuum pump, moisture trap.Cushion through vacuum buffer tank from concentrating the gas that reaches vacuum drying system, enter water ring vacuum pump, after moisture trap divided water, gas directly entered in the atmosphere.Concentrate, when dry owing to vacuumize, under negative pressure state, produce a large amount of MIBK gas, because solvent gas is difficult to the condensation recovery under the negative pressure, a large amount of MIBK gas enters in the atmosphere by the gas extraction system of vavuum pump, environment is caused severe contamination, the water that contains MIBK enters sewage treatment plant after moisture trap separates, because of MIBK is difficult to biochemical treatment, bring very big difficulty to sewage disposal.
Processing method to organic exhaust gas in the industry at present mainly contains active carbon adsorption, absorption process, Production by Catalytic Combustion Process, biofilter method, membrane separation process etc.In actual production, what usually run into is low concentration, big air quantity, the unsettled MIBK of containing waste gas, and in this case, it is optimum adopting liquid absorption method.Liquid absorption method is by the contacting of waste gas and absorbent, and makes wherein harmful constituent be absorbed agent and absorbs.Through desorb, its component is removed or reclaimed, make absorbent regeneration, reuse.The required cleaning equipment volume of this method is little, and cost is low, and absorbent can be regenerated, and pollutant can be converted into useful products, and the key of this technology is the selection and the regeneration of absorbent.The present invention utilizes waste compressor oil as the absorbent that purifies MIBK waste gas, the treatment of wastes with processes of wastes against one another, and utilize distillating method to reclaim organic solvent, make waste compressor oil regeneration, realize the comprehensive utilization of environment and resource, at present the domestic report of not seeing this kind method as yet.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing waste compressor oil from water ring vacuum pump pump drainage gas system recoveries MIBK gas, solve in the water ring vacuum pump system exhaust and contain a large amount of MIBK gas, the problem of serious environment pollution makes the exhaust index reach " discharge standard of air pollutants " requirement (GB16297-1996); Realize the recycling of water ring vacuum pump water, the conserve water resource reduces the sewage disposal expense.
Finish the technical scheme of foregoing invention task: the common water ring vacuum pump evacuation system is improved, on the basis of the original vacuum buffer tank of system, water ring vacuum pump, moisture trap, increased water circulating pump, machine oil does not have brine tank, has increased the air inlet distributor pipe in vacuum buffer tank.The air inlet distributor pipe is made up of air inlet standpipe, annular distributor pipe.The circle diameter of annular distributor pipe is 2/3～3/4 of a true buffering slack tank diameter, and preferred value is 3/4; It is 30 ° steam vent that annular distributor pipe bottom has three row folding angles, and the steam vent aperture is 3～5mm, and preferred value is 3mm; The steam vent gross area is 110～120% of an air inlet pipe sectional area, and preferred value is 115%; The waste compressor oil that exceeds annular distributor pipe 300～900mm is housed in the vacuum buffer tank, and preferred value is 600mm.At 3.5m
3Machine oil does not have no salt solution and waste compressor oil is housed in the brine tank, in to establish area be 12m
2The cooling water temperature coil pipe, be used for the cooling of vavuum pump cycling use of water, machine oil does not have waste compressor oil in the brine tank on the upper strata, be about 1/5～1/3 of no brine volume, preferred value is 1/4, be used for the MIBK that extraction cycle water dissolves, make it be in undersaturated condition all the time, can absorb MIBK waste gas to greatest extent when the no salt solution that recycles is contacted with gas in water ring vacuum pump.
From concentrating the gas that reaches vacuum drying system, enter the vacuum buffer tank that waste compressor oil is housed through the air inlet distributor pipe earlier, after the waste compressor oil in surge tank absorbs MIBK gas, enter water ring vacuum pump; The gas that contains a small amount of MIBK in the water ring vacuum pump fully contacts with the undersaturated no salt solution that is lower than 25 ℃, enter moisture trap after further absorbing MIBK waste gas, the gas that contains micro-MIBK behind the branch water directly enters atmosphere, the moisture trap draining enters machine oil not to be had in the brine tank, recycles after machine oil extraction, cooling.Vacuum buffer tank, machine oil do not have waste compressor oil in the brine tank absorb MIBK waste gas saturated after, send Distallation systm to reclaim.
Advantage of the present invention: adopt technical scheme of the present invention and optimized parameters, waste compressor oil is to the removal efficient height of MIBK waste gas, and it is wide to adapt to concentration range, when the MIBK inlet gas concentration is 800～2500mg/m
3The time, exhaust concentration is 43～63mg/m
3, being lower than the GB16297-1996 maximal emission is 120mg/m
3Required value, MIBK waste gas clearance is 94.6～97.5%; Realize the recycling of water ring vacuum pump water, saved water resource, reduced the sewage disposal expense.The waste compressor oil that absorbs after saturated can be realized separating of waste compressor oil and MIBK by distillation according to the difference of boiling point, reclaims MIBK, makes reuse after the waste compressor oil regeneration simultaneously.Through the gas chromatographic detection analysis, the distillate MIBK purity that 114～117 ℃ of distillations obtain reaches the technical grade quality standard greater than 99.5% (wt), can be back in the pharmaceutical production; The waste compressor oil that steams behind the MIBK is back to the MIBK waste gas cleaning system.
Description of drawings
Accompanying drawing 1 is a common water ring vacuum pump pump drainage air-flow journey; 1-vacuum buffer tank, 2-water ring vacuum pump, 3-moisture trap.
Accompanying drawing 2 is technological processes of purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil of the present invention; 1-vacuum buffer tank, 2-water ring vacuum pump, 3-moisture trap, 4-water circulating pump, 5-machine oil do not have brine tank, 6-air inlet distributor pipe.1.-from concentrating the gas that reaches vacuum drying system; 2.-the water ring vacuum pump air inlet; 3.-the water ring vacuum pump exhaust; 4.-the moisture trap exhaust; 5.-the moisture trap draining; 6.-the recirculated water water inlet; 7.-waste compressor oil adds inlet; 8.-no salt solution water supplement port; 9.-the cooling water backwater; 10.-the cooling water water inlet;
-saturated waste compressor oil outlet.
Accompanying drawing 3 is structural representations of vacuum buffer canister incoming gas distributor pipe 6 in the technological process of purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil of the present invention; 6-1-air inlet distributor pipe front view; 6-2-air inlet distributor pipe upward view; 6-3-air inlet distributor pipe cutaway view.
The specific embodiment
To the method for purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil of the present invention, the technological process with reference to accompanying drawing 2 is described as follows: from concentrating the 1. middle MIBK exhaust gas concentration of the gas that reaches vacuum drying system is 800～2500mg/m
3, enter through air inlet distributor pipe 6 vacuum buffer tank 1 that exceeds annular distributor pipe 600mm waste compressor oil is housed, after the waste compressor oil in surge tank 1 absorbs MIBK gas, 2. enter in the water ring vacuum pump 2 through the water ring vacuum pump air inlet; The speed of exhaust of water ring vacuum pump 2 is 4～6m
3/ min, the gas that contains a small amount of MIBK in water ring vacuum pump 2 fully contacts with the undersaturated recirculated water that is lower than 25 ℃, further absorb MIBK waste gas after 3. the water ring vacuum pump exhaust enters moisture trap 3,4. the gas that contains micro-MIBK behind the branch water enter atmosphere through the moisture trap exhaust, and the MIBK exhaust gas concentration is 43～63mg/m in the exhaust
35. the water that moisture trap 3 is told enter machine oil through the moisture trap draining does not have in the brine tank 5, the waste compressor oil that does not have in the brine tank 5 through machine oil extracts, again through behind the cooling water temperature that 10. the cooling water water inlet enters, 9. the cooling water backwater flows out, 6. be delivered to water ring vacuum pump 2 by water circulating pump 4 through the recirculated water water inlet and recycle, the quantity of circulating water of conveying is 30～35L/min.Vacuum buffer tank 1, machine oil do not have waste compressor oil in the brine tank 5 absorb MIBK waste gas saturated after, respectively through saturated waste compressor oil outlet
Discharge, send Distallation systm to reclaim, the MIBK distillate purity that obtains 114～117 ℃ of cats head during distillation is 99.5% (wt), reaches the technical grade quality standard, can be back in the pharmaceutical production; The waste compressor oil that steams behind the MIBK is back to the MIBK waste gas cleaning system.Machine oil does not have waste compressor oil in the brine tank 5 and adds inlet through waste compressor oil and 7. in time add, the recirculated water of loss by no salt solution water supplement port 8. mend into.
Claims (7)
1. method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil, it is characterized in that, this recovery method absorbs vacuum system methyl iso-butyl ketone (MIBK) (MIBK) waste gas with waste compressor oil, utilizes distillation to reclaim MIBK again, makes waste compressor oil regeneration; System improves to common water ring vacuum pump pump drainage gas, on the basis of the pump drainage gas system that reason vacuum buffer tank (1), water ring vacuum pump (2), moisture trap (3) are formed, increased water circulating pump (4), machine oil does not have brine tank (5), in vacuum buffer tank (1), increased air inlet distributor pipe (6), vacuum buffer tank is equipped with waste compressor oil in (1), do not have at machine oil no salt solution and waste compressor oil are housed in the brine tank (5), in establish the cooling water temperature coil pipe, no salt solution through the cooling after recycle.
2. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1 is characterized in that, the waste compressor oil of the annular distributor pipe 600mm that exceeds air inlet distributor pipe (6) is housed in vacuum buffer tank (1).
3. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1 is characterized in that, does not have at machine oil no salt solution and waste compressor oil are housed in the brine tank (5), and waste compressor oil is 1/4 of no brine volume.
4. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1, it is characterized in that, waste compressor oil after absorption MIBK waste gas is saturated send Distallation systm to reclaim, obtain MIBK in 114～117 ℃ of distillations of tower top temperature, purity is greater than 99.5% (wt), reach the technical grade quality standard, can be back in the production, the waste compressor oil that steams behind the MIBK is back to the MIBK waste gas cleaning system.
5. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1, it is characterized in that, in vacuum buffer tank (1), be provided with air inlet distributor pipe (6), form by air inlet standpipe, annular distributor pipe, the circle diameter of annular distributor pipe is 2/3～3/4 of a vacuum buffer tank diameter, annular distributor pipe bottom has three row's steam vents, and the steam vent gross area is 115% of an air inlet pipe sectional area.
6. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1 is characterized in that, does not have in the brine tank (5) at machine oil to be provided with the cooling water temperature coil pipe, and the cooling coil area is 12m
2
7. a kind of method of utilizing purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil according to claim 1 is characterized in that, the no salt solution that does not have in the brine tank (5) at machine oil recycles after cooling, and cooling back temperature is lower than 25 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100137997A CN101496981B (en) | 2009-01-20 | 2009-01-20 | Method for purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil |
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| CN2009100137997A CN101496981B (en) | 2009-01-20 | 2009-01-20 | Method for purifying methyl isobutyl ketone exhaust gas in vacuum system using waste compressor oil |
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| CN101496981A CN101496981A (en) | 2009-08-05 |
| CN101496981B true CN101496981B (en) | 2011-11-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102000441A (en) * | 2010-10-20 | 2011-04-06 | 王胜伟 | Improved oil gas recovery device of decarburization vacuum pump |
| CN103432767A (en) * | 2013-08-29 | 2013-12-11 | 张家港市三联化工科技有限公司 | Recovery device of extraction solvent MIBK (Methyl Iso Butyl Ketone) flash evaporation |
| CN108250065B (en) * | 2016-12-28 | 2020-05-22 | 中昊晨光化工研究院有限公司 | Device and method for recovering perfluorooctanoic acid from fluoropolymer drying tail gas |
| CN107191358A (en) * | 2017-06-28 | 2017-09-22 | 无锡市银杏塑业科技有限公司 | A kind of cooling device for vacuum pump |
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| US4857084A (en) * | 1988-06-10 | 1989-08-15 | The Dow Chemical Company | Pressure swing adsorption apparatus and process for recovery of oil-soluble vapors |
| CN1133482C (en) * | 2001-03-13 | 2004-01-07 | 魏德兴 | Method and equipment for absorbing volatilized gas of gasoline |
| CN1509798A (en) * | 2002-12-25 | 2004-07-07 | 何培鎏 | Paint spraying exhaust treating process and apparatus thereof |
| CN201077924Y (en) * | 2007-05-15 | 2008-06-25 | 上海雅森洗涤设备有限公司 | Petroleum hydrocarbon dry-cleaning solvent distillation recovery device |
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2009
- 2009-01-20 CN CN2009100137997A patent/CN101496981B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033793A (en) * | 1987-12-25 | 1989-07-12 | 昭和电工株式会社 | Fluorine-containing Lyons 113 treatment of waste gas square law devices |
| US4857084A (en) * | 1988-06-10 | 1989-08-15 | The Dow Chemical Company | Pressure swing adsorption apparatus and process for recovery of oil-soluble vapors |
| CN2040407U (en) * | 1988-08-25 | 1989-07-05 | 严福临 | High-efficient energy-saving dryer and purger |
| CN1133482C (en) * | 2001-03-13 | 2004-01-07 | 魏德兴 | Method and equipment for absorbing volatilized gas of gasoline |
| CN1509798A (en) * | 2002-12-25 | 2004-07-07 | 何培鎏 | Paint spraying exhaust treating process and apparatus thereof |
| CN201077924Y (en) * | 2007-05-15 | 2008-06-25 | 上海雅森洗涤设备有限公司 | Petroleum hydrocarbon dry-cleaning solvent distillation recovery device |
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