CN104557421B - Triple effect toluene recovery technology - Google Patents
Triple effect toluene recovery technology Download PDFInfo
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- CN104557421B CN104557421B CN201310486454.XA CN201310486454A CN104557421B CN 104557421 B CN104557421 B CN 104557421B CN 201310486454 A CN201310486454 A CN 201310486454A CN 104557421 B CN104557421 B CN 104557421B
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- evaporimeter
- toluene
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- concentrate pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
A kind of triple effect toluene recovery technology, use the device of three vertical array tubular evaporimeters (1,2,3), a vertical array tubular condenser (4), a separated and collected tank (5), four delivery pumps (6,7,8,9) and a set of vacuum system composition, crude cresylic acid is through three grades of evaporations of three evaporimeters, the toluene vapor obtaining is collected after by condenser condenses, and the toluene vapor that first, second evaporimeter produces is as the heating gas of second, third evaporimeter. The present invention has increased the 3rd evaporimeter on traditional economic benefits and social benefits recovery process basis, and supporting corresponding concentrated conveying device, and the recycling ability of equipment is improved greatly, has improved approximately 50%; Owing to adopting multistage recovery, the toluene purity obtaining is high, steady quality; And, take full advantage of the heat of the toluene vapor that first, second evaporimeter produces, energy-saving and emission-reduction, this recovery process energy consumption is 70% of economic benefits and social benefits toluene recovery technique.
Description
Technical field
The present invention relates to a kind of purification recovery technology of toluene solvant, a kind of triple effect toluene recovery technology.
Background technology
Manufacture industry in chemical industry and other, toluene is a kind of very conventional solvent, because its flash-point is low, Yi HuiSend out and there is certain toxicity, after discharge, can pollute atmosphere, therefore needing to reclaim. And traditional recoveryTechnology can only be accomplished economic benefits and social benefits, and heat utilization ratio is low, and cost is high, does not meet the requirement of current international and domestic industry energy-saving and emission-reduction,Reclaim energy consumption in the urgent need to reducing, reduce production costs.
Summary of the invention
The present invention is intended to propose a kind of toluene recovery method that heat utilization ratio is higher, a kind of triple effect toluene recovery method.
This triple effect toluene recovery method is used three vertical array tubular evaporimeters, a vertical array tubular condenser, a separationThe device of collecting tank, four delivery pumps and a set of vacuum system composition, wherein three vertical array tubular evaporimeters are: firstEvaporimeter, the second evaporimeter, the 3rd evaporimeter, four delivery pumps are: the first concentrate pump, the second concentrate pump,Three concentrate pumps and smart toluene pump; This triple effect toluene recovery method comprises the steps:
(1) order needs the crude cresylic acid reclaiming to enter the tube side of the 3rd evaporimeter, makes in the tube side of the second evaporimeter outToluene vapor enters the shell side of the 3rd evaporimeter, and the crude cresylic acid in the tube side of the 3rd evaporimeter is heated, and evaporation obtainsToluene vapor extract after vertical array tubular condenser condenses by vacuum system, enter separated and collected tank, described trueDo-nothing system carries out vacuum suction to separated and collected tank;
(2) the toluene liquid after the 3rd evaporimeter primary evaporator is concentrated is transported to the second evaporation by the 3rd concentrate pumpIn the tube side of device, meanwhile, the tube side that makes the first evaporimeter toluene vapor out enters the shell side of the second evaporimeter, toIn two evaporimeter tube sides, preliminary concentrated toluene liquid carries out heating evaporation, the tube side of the second evaporimeter and the 3rd evaporimeterThe toluene that in tube side, condensation obtains enters into after vertical array tubular condenser, then enters separated and collected tank;
(3) through the second evaporimeter further concentrated toluene liquid be transported to the first evaporimeter by the second concentrate pumpIn tube side, the steam that passes into 0.5～0.8MPa in the shell side of the first evaporimeter heats, and solidifying water is discharged through drain valve,Get to Hou Dao through the concentrated raffinate of the first evaporimeter by the first concentrate pump and carry out raffinate processing.
The present invention has increased the 3rd evaporimeter on traditional economic benefits and social benefits recovery process basis, and supporting corresponding concentrated defeatedSend device, the recycling ability of equipment is improved greatly, can improve approximately 50%; Owing to adopting multistage recovery, institute obtainsToluene purity high, steady quality; And, take full advantage of the heat of the toluene vapor that first, second evaporimeter produces,Energy-saving and emission-reduction, this recovery process energy consumption is 70% of economic benefits and social benefits toluene recovery technique.
Brief description of the drawings
Accompanying drawing is the schematic diagram of this triple effect toluene recovery method.
Detailed description of the invention
As shown in the figure, this triple effect toluene recovery method use three vertical array tubular evaporimeters, vertical array tubular condenser 4,The device of separated and collected tank 5, four delivery pumps and a set of vacuum system composition. Wherein three vertical array tubular evaporimetersFor: the first evaporimeter 1, the second evaporimeter 2, the 3rd evaporimeter 3; Four delivery pumps are: the first concentrate pump 6,Two concentrate pumps 7, the 3rd concentrate pump 8, smart toluene pump 9.
As shown in the figure, these equipment connection methods are: the shell side import of the first evaporimeter 1 is heating steam import, firstThe tube side import of evaporimeter is connected with the outlet of the second concentrate pump 7, the liquid outlet of the tube side of the first evaporimeter and firstThe import of concentrate pump 6 is connected, and the gas vent of the tube side of the first evaporimeter is connected with the shell side import of the second evaporimeter 2.The shell side outlet of the second evaporimeter 2 is connected with the shell side import of vertical array tubular condenser 4, the tube side import of the second evaporimeterBe connected with the outlet of the 3rd concentrate pump 8, the import of the liquid outlet of the tube side of the second evaporimeter and the second concentrate pump 7Be connected, the gas vent of the tube side of the second evaporimeter 2 is connected with the shell side import of the 3rd evaporimeter 3. The 3rd evaporimeter 3Shell side outlet be connected with the shell side import of vertical array tubular condenser 4, the tube side import of the 3rd evaporimeter is crude cresylic acid import,The liquid outlet of the tube side of the 3rd evaporimeter is connected with the import of the 3rd concentrate pump 8, the gas of the tube side of the 3rd evaporimeterOutlet is connected with the shell side import of vertical array tubular condenser 4. Shell side outlet and the separated and collected tank 5 of vertical array tubular condenser 4Import be connected, the liquid outlet of separated and collected tank is connected with the import of smart toluene pump 9. On separated and collected tank 5, there is oneVacuum orifice, is connected with vacuum system.
This triple effect toluene recovery method comprises the steps:
(1) crude cresylic acid that needs to reclaim enters the tube side of the 3rd evaporimeter 3, in the tube side of the second evaporimeter 2 outToluene vapor (approximately 100 DEG C) enters the shell side of the 3rd evaporimeter 3, and the crude cresylic acid in the tube side of the 3rd evaporimeter is addedHeat, the toluene vapor that evaporation obtains extracts after 4 condensations of vertical array tubular condenser by vacuum system, enters to separate to receiveCollection tank 5, vacuum system is carried out vacuum suction to separated and collected tank 5;
(2) the toluene liquid after the 3rd evaporimeter 3 primary evaporator concentrates is transported to second by the 3rd concentrate pump 8In the tube side of evaporimeter 2, meanwhile, the tube side of the first evaporimeter 1 toluene vapor (approximately 110 DEG C) out enters the second steamingThe shell side of hair device 2, carries out heating evaporation, the second evaporimeter 2 to preliminary concentrated toluene liquid in the second evaporimeter tube sideTube side and the tube side of the 3rd evaporimeter 3 in the toluene that obtains of condensation enter into after vertical array tubular condenser 4, then enter pointFrom collecting tank 5; The smart toluene of collecting in separated and collected tank is transferred out by smart toluene pump 9.
(3) be transported to the first evaporimeter 1 through the further concentrated toluene of the second evaporimeter 2 by the second concentrate pump 7Tube side in, the steam that passes into 0.5～0.8MPa in the shell side of the first evaporimeter heats, the solidifying water of steam is through hydrophobicValve is discharged, and gets to Hou Dao carry out raffinate processing through the concentrated raffinate of the first evaporimeter by the first concentrate pump 6.
In this triple effect toluene recovery method, the first evaporimeter 1 can pass through high viscosity pressure reduction liquid level sensor control firstThe discharging speed of concentrate pump 6, the second evaporimeter 2 is by high viscosity pressure reduction liquid level sensor control the second concentrate pump 7Discharging speed, the 3rd evaporimeter 3 is by the discharging speed of high viscosity pressure reduction liquid level sensor control the 3rd concentrate pump 8,The inlet amount of crude cresylic acid is set according to need of production, the first evaporimeter 1 opening by temperature sensor control steam pneumatic operated valveDegree, controls the inlet of steam, thereby controls the balance of whole evaporation, and further ensure that the first evaporimeter 1 passes throughThe concentration of the toluene raffinate of the first concentrate pump output; The crude cresylic acid that enters the 3rd evaporimeter 3 also can use the first steaming in advanceThe solidifying water that hair device 1 is discharged preheats.
Triple effect toluene recovery technology of the present invention is compared and is had following characteristics with traditional handicraft:
1, the equipment of same area, recycling ability improves greatly, improves approximately 50%.
2, multistage recovery, toluene purity is high, steady quality.
3, make full use of the energy, energy-saving and emission-reduction, this retracting device energy consumption is 70% of economic benefits and social benefits toluene recovery device, lowerCarbocyclic ring is protected.
In triple effect toluene recovery technology of the present invention, the reference data of the specification of each equipment is:
Vertical array tubular evaporimeter: 350 squares,
Vertical array tubular condenser: 400 squares,
Separated and collected tank: 2 cubes,
Delivery pump: 50 cubic meters/hour,
Vacuum system: 3 cubic meters/hour ,-0.1Mpa.
Technological parameter when operation is:
Crude cresylic acid is squeezed into speed: 10-50 cubic meter/hour,
Discharging speed: 3-20 cubic meter/hour,
Quantity of steam: 1.5-4.0 ton/hour,
Recirculated water: 200-400 cubic meter/hour.
Claims (2)
1. a triple effect toluene recovery method, use three vertical array tubular evaporimeters, a vertical array tubular condenser (4),The device of a separated and collected tank (5), four delivery pumps and a set of vacuum system composition, wherein three vertical array tubulars steamHair device is: the first evaporimeter (1), the second evaporimeter (2), the 3rd evaporimeter (3), four delivery pumps are: first is denseContracting liquid pump (6), the second concentrate pump (7), the 3rd concentrate pump (8) and smart toluene pump (9); It is characterized in that this threeEffect toluene recovery method comprises the steps:
(1) crude cresylic acid that order need to be reclaimed enters the tube side of the 3rd evaporimeter (3), makes the pipe of the second evaporimeter (2)In journey, toluene vapor out enters the shell side of the 3rd evaporimeter (3), and the crude cresylic acid in the tube side of the 3rd evaporimeter is carried outHeating, the toluene vapor that obtains of evaporation extracts after vertical array tubular condenser (4) condensation by vacuum system, enters pointFrom collecting tank (5), described vacuum system is carried out vacuum suction to separated and collected tank (5);
(2) the toluene liquid after the preliminary evaporation and concentration of the 3rd evaporimeter (3) is carried by the 3rd concentrate pump (8)In the tube side of the second evaporimeter (2), meanwhile, the tube side that makes the first evaporimeter (1) toluene vapor out entersThe shell side of two evaporimeters (2), carries out heating evaporation to preliminary concentrated toluene liquid in the second evaporimeter tube side, and second steamsThe toluene that in the tube side of the tube side of hair device (2) and the 3rd evaporimeter (3), condensation obtains enters into vertical array tubular condenser (4)After, then enter separated and collected tank (5);
(3) through the second evaporimeter (2) further concentrated toluene liquid be transported to the by the second concentrate pump (7)In the tube side of one evaporimeter (1), the steam that passes into 0.5～0.8MPa in the shell side of the first evaporimeter heats, solidifying waterDischarge through drain valve, get to Hou Dao through the concentrated raffinate of the first evaporimeter by the first concentrate pump (6) and carry out raffinate placeReason.
2. triple effect toluene recovery method as claimed in claim 1, is characterized in that: the first evaporimeter (1) passes through high viscosityThe discharging speed of pressure reduction liquid level sensor control the first concentrate pump (6), the second evaporimeter (2) is by high viscosity pressure reductionThe discharging speed of liquid level sensor control the second concentrate pump (7), the 3rd evaporimeter (3) is by high viscosity pressure reduction liquid levelThe discharging speed of sensor control the 3rd concentrate pump (8), the inlet amount of crude cresylic acid is set according to need of production, and first steamsHair device (1), by the aperture of temperature sensor control steam pneumatic operated valve, is controlled the inlet of steam, thereby controls wholeThe balance of evaporation, and further ensure the concentration of the first evaporimeter (1) through the toluene raffinate of the first concentrate pump output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310486454.XA CN104557421B (en) | 2013-10-16 | 2013-10-16 | Triple effect toluene recovery technology |
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| CN201310486454.XA CN104557421B (en) | 2013-10-16 | 2013-10-16 | Triple effect toluene recovery technology |
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| CN104557421A CN104557421A (en) | 2015-04-29 |
| CN104557421B true CN104557421B (en) | 2016-05-18 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107596715B (en) * | 2017-11-06 | 2021-06-01 | 李少艳 | Series-parallel connection multiple-effect concentration process |
| CN108083965A (en) * | 2017-12-06 | 2018-05-29 | 启东久星化工有限公司 | A kind of recycling technique of toluene |
| CN108579115A (en) * | 2018-05-04 | 2018-09-28 | 绵阳科大久创科技有限公司 | A kind of negative pressure evaporation rectifying combination separator |
| CN109776251A (en) * | 2019-03-15 | 2019-05-21 | 烟台东洁环保机械工程有限公司 | Toluene quadruple effect recovery process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082702A1 (en) * | 1981-12-23 | 1983-06-29 | Mobil Oil Corporation | Conversion of Fischer-Tropsch synthesis products to benzene, xylene and toluene |
| CN102824751A (en) * | 2012-08-31 | 2012-12-19 | 烟台东洁环保机械工程有限公司 | Distillation separation and recovery method for toluene-polyethylene mixed solution and used equipment |
| CN102886150A (en) * | 2012-09-20 | 2013-01-23 | 烟台东洁环保机械工程有限公司 | Double-effect evaporation method for crude toluene mixed solution and device using double-effect evaporation method |
| CN103007565A (en) * | 2013-01-11 | 2013-04-03 | 张瑞烟 | Method and device for triple-effect separation of methylbenzene and polyethylene |
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2013
- 2013-10-16 CN CN201310486454.XA patent/CN104557421B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0082702A1 (en) * | 1981-12-23 | 1983-06-29 | Mobil Oil Corporation | Conversion of Fischer-Tropsch synthesis products to benzene, xylene and toluene |
| CN102824751A (en) * | 2012-08-31 | 2012-12-19 | 烟台东洁环保机械工程有限公司 | Distillation separation and recovery method for toluene-polyethylene mixed solution and used equipment |
| CN102886150A (en) * | 2012-09-20 | 2013-01-23 | 烟台东洁环保机械工程有限公司 | Double-effect evaporation method for crude toluene mixed solution and device using double-effect evaporation method |
| CN103007565A (en) * | 2013-01-11 | 2013-04-03 | 张瑞烟 | Method and device for triple-effect separation of methylbenzene and polyethylene |
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Effective date of registration: 20161009 Address after: 314003 Jiaxing Economic Development Zone, Zhejiang Ping Road, No. 777 Patentee after: Hexin Kuraray Microfibric Leather (Jiaxing) Co., Ltd. Patentee after: Tobacco Taidongjie Environmental Mechine Engineering Co., Ltd. Patentee after: ZHEJIANG HEXIN NEW MATERIAL CO., LTD. Address before: 314003 Jiaxing Economic Development Zone, Zhejiang Ping Road, No. 777 Patentee before: Hexin Kuraray Microfibric Leather (Jiaxing) Co., Ltd. Patentee before: Tobacco Taidongjie Environmental Mechine Engineering Co., Ltd. Patentee before: Zhejiang Hexin Industry Group Co., Ltd. |