CN103223287B - Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method - Google Patents
Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method Download PDFInfo
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- CN103223287B CN103223287B CN201310152454.6A CN201310152454A CN103223287B CN 103223287 B CN103223287 B CN 103223287B CN 201310152454 A CN201310152454 A CN 201310152454A CN 103223287 B CN103223287 B CN 103223287B
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Abstract
The invention belongs to exhaust gas processing, and relates to a purifying and recovering device of exhaust gas comprising toluene, and an exhaust gas purifying and recovering method. The device comprises an absorption bed. The lower part of the absorption bed is connected with a toluene exhaust gas channel and a saturated steam channel through pipes. A purified air discharge channel is arranged on the upper part of the absorption bed. The purified air discharge channel is connected with a condensing heat exchanger through a pipe. The condensing heat exchanger is connected with a cooling water returning channel, a cooling water inlet channel, and an emptying channel. The lower part of the condensing heat exchanger is connected with a condensate storage tank through a pipe. The lower part of the condensate storage tank is connected with the upper part of a toluene collection tank through a pipe. A recovered toluene discharge channel is arranged on the lower part of the toluene collection tank. The recovering method comprises the steps that: exhaust gas comprising toluene is processed by using the absorption bed; obtained purified air is discharged from the purified air discharge channel; and the separated toluene is collected in the toluene collection tank and is preserved for later use. According to the invention, the device is simple, operation is convenient, running cost is low, toluene-comprising exhaust gas purification effect is good, and a discharge standard is reached.
Description
Technical field
The invention belongs to the process of waste gas, particularly a kind of purification recovery device containing toluene waste gas and waste gas purification recovery method thereof.
Background technology
In the industrial production, toluene is widely used in medication chemistry industry as excellent solvent, and for a long time, people are devoted to the research of toluene waste gas Treatment process always.Toluene belongs to precursor chemicals, low toxicity, median lethal dose rat, per os 5000mg/kg.High concentrations of gas has narcoticness.Irritant.If directly discharge has serious harm to environment, can pollute air, water environment and water source.Human body sucks can there is neurasthenic syndrome, hepatomegaly, woman worker's menoxenia etc.As far back as nineteen twenty-five Europe just develop fixed bed absorbent charcoal adsorber, within 1958, Japan also brings into use this technology.Charcoal absorption is a kind of very classical, ripe method, can be used for the normal temperature organic exhaust gas administering multiple concentration, but when process low concentration, Wind Volume organic exhaust gas, equipment is huge, uneconomical.Up to the present, people oneself develop a series of fruitful control technology after deliberation.VOC VOCs purification techniques substantially can be divided into recovery and eliminate two classes, absorption method mainly contains absorption method, condensation method, absorption process and membrane separation process, by physical method, temperature, selective absorber and permoselective membrane etc. is utilized to carry out separation and recovery organic solvent.Null method has the technology such as thermal oxide, catalytic combustion, biological oxidation, mainly by chemistry or biochemical reaction, with heat, catalyst and microorganism etc., organic matter is transformed into CO
2and H
2o.But the toluene waste gas of most plant emissions still exceedes discharge standard; Although the emission compliance had, disposal cost is too high.People are finding the purification of simple to operate, that cost is low, effective toluene waste gas and recovery method always for this reason.
Xinhua's pharmacy hormone series of products walsh oxidation post widely applies toluene as solvent, a large amount of toluene waste gas is produced in solvent transfer, reduced pressure concentration process, this waste gas toluene concentration is on average at about 500ppm, company adopts the methods such as spray-absorption method, active carbon adsorption, cooling method to carry out containing the improvement of toluene waste gas, effect is all undesirable, does not reach discharge standard, causes Production Regional toluene peculiar smell obvious, operator and around worker suffer, worker's strong reaction.Adopt new method process to be the striving direction of workshop and environmental administration of company containing toluene waste gas always.
Summary of the invention
The object of this invention is to provide a kind of purification recovery device containing toluene waste gas and waste gas purification recovery method thereof, simple to operate, easy to operate, operating cost is low, purification is effective containing the waste gas of toluene, reaches discharge standard.
Purification recovery device containing toluene waste gas of the present invention, comprises adsorbent bed, and adsorbent bed bottom is by pipeline and toluene waste gas passage and saturated vapor expanding channels; Adsorbent bed top is provided with the exhaust passage that purifies air, and the exhaust passage that purifies air is connected with condensing heat exchanger by pipeline; Condensing heat exchanger connects cooling water backwater channel, cooling water intake tunnel and emptying passage; Condensing heat exchanger bottom is connected with condensate tank by pipeline; Condensate tank bottom is connected with toluene collecting tank top by pipeline, and toluene collecting tank bottom is provided with reclaims toluene tapping channel.
Adsorbent bed is built with filler.
Described filler is XDA-8 polymeric adsorbent.
Toluene waste gas passage, saturated vapor passage, the exhaust passage that purifies air, emptying passage, cooling water intake tunnel and recovery toluene discharging opening passage arrange valve.
Adopt the purification recovery device containing toluene waste gas and waste gas purification recovery method thereof, containing the waste gas of toluene through adsorbent bed, form Purge gas and the filler containing toluene, Purge gas is discharged by the exhaust passage that purifies air, filler containing toluene carries out layering by entering condensate tank by condensing heat exchanger after the purging of saturated vapor, and isolating toluene, to enter toluene collecting tank for subsequent use.
Be 40-60 DEG C containing toluene mist temperature.
The time that toluene waste gas continues through adsorbent bed is 6-10 hour.
Mist flow velocity is 0.6-1.2m/s.
The time that saturated vapor purges adsorbent bed is 50-70min.
Containing the purification recovery device of toluene waste gas and the concrete steps of waste gas purification recovery method thereof be:
Mist containing toluene is entered bottom adsorbent bed by toluene waste gas passage, the filled absorption of toluene, forms the filler containing toluene, and the Purge gas after purification is discharged by the exhaust passage that purifies air; Then saturated vapor is passed into bottom adsorbent bed by saturated vapor passage, purge adsorbent bed, form the gaseous mixture of toluene and steam, the gaseous mixture of toluene and steam is after condenser heat exchanger, enter condensate tank, obtain toluene through stratification at toluene collecting tank, toluene is taken out by toluene tapping channel.
Compared with prior art, the present invention has following beneficial effect:
The present invention contains purification recovery device and the waste gas purification recovery method thereof of toluene waste gas, and device is simple, easy to operate, and operating cost is low, purification is effective containing the waste gas of toluene, reaches discharge standard.
Accompanying drawing explanation
Fig. 1 is the purification recovery device containing toluene waste gas;
Wherein, 1, adsorbent bed, 2, condensing heat exchanger, 3, condensate tank, 4, toluene collecting tank, 5, toluene waste gas passage, 6, saturated vapor passage, 7, purify air exhaust passage, 8, emptying passage, 9, cooling water backwater channel, 10, cooling water intake tunnel, 11, toluene tapping channel.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
The purification recovery device containing toluene waste gas as shown in Figure 1, comprise adsorbent bed 1, adsorbent bed 1 bottom is connected with toluene waste gas passage 5 and saturated vapor passage 6 by pipeline, and adsorbent bed 1 is built with filler; Adsorbent bed 1 top is provided with the exhaust passage 7 that purifies air, and the exhaust passage 7 that purifies air is connected with condensing heat exchanger 2 by pipeline; Condensing heat exchanger 2 connects cooling water backwater channel 9, cooling water intake tunnel 10 and emptying passage 8; Condensing heat exchanger 2 bottom is connected with condensate tank 3 by pipeline; Condensate tank 3 bottom is connected with toluene collecting tank 4 top by pipeline, and toluene collecting tank 4 bottom is provided with reclaims toluene tapping channel 11.
Described filler is XDA-8 polymeric adsorbent.
Toluene waste gas passage 5, saturated vapor passage 6, the exhaust passage 7 that purifies air, emptying passage 8, cooling water intake tunnel 10 and recovery toluene discharging opening passage 11 arrange valve.
Adsorbent bed parameter is: tower height 2800mm, tower diameter 800mm, filler floor height 2000mm, and filler is XDA-8 polymeric adsorbent.
Adopt the waste gas purification recovery method of the purification recovery device containing toluene waste gas, 40 DEG C of waste gas containing toluene with the flow velocity of 0.6m/s through adsorbent bed 7 hours, form Purge gas and the filler containing toluene, Purge gas is discharged by the exhaust passage that purifies air, filler containing toluene carries out layering by entering condensate tank by condensing heat exchanger after the purging 150min of saturated vapor, and isolating toluene, to enter toluene collecting tank for subsequent use.
Employing containing the concrete steps of the waste gas purification recovery method of the purification recovery device of toluene waste gas is:
Open toluene waste gas air intake valve, open the drain tap that purifies air, the mist containing toluene of 40 DEG C is entered by toluene waste gas passage 5 with the flow velocity of 0.6m/s bottom adsorbent bed 1, continue through adsorbent bed 7 hours, toluene in waste gas is by adsorbent, form the filler containing toluene, the Purge gas after purification is discharged by the exhaust passage 7 that purifies air; Then toluene waste gas air intake valve and the drain tap that purifies air is closed, open condenser temperature lowering water, drive saturated vapor intake valve, saturated vapor is passed into bottom adsorbent bed 1 by saturated vapor passage 6, purge adsorbent bed 150min, the mixture of toluene and water vapour, after condenser heat exchanger 2, enters condensate tank 3, obtain toluene through stratification at toluene collecting tank 4, toluene is taken out by toluene tapping channel 11.
Embodiment 2
Absorption method process is identical with embodiment 1 containing the device of toluene waste gas.
Adopt the waste gas purification recovery method of the purification recovery device containing toluene waste gas, 60 DEG C of waste gas containing toluene with the flow velocity of 1.1m/s through adsorbent bed 10 hours, form Purge gas and the filler containing toluene, Purge gas is discharged by the exhaust passage that purifies air, filler containing toluene carries out layering by entering condensate tank by condensing heat exchanger after the purging 80min of saturated vapor, and isolating toluene, to enter toluene collecting tank for subsequent use.
Employing containing the concrete steps of the waste gas purification recovery method of the purification recovery device of toluene waste gas is:
Open toluene waste gas air intake valve, open the drain tap that purifies air, the mist containing toluene of 60 DEG C is entered by toluene waste gas passage 5 with the flow velocity of 1.1m/s bottom adsorbent bed 1, continue through adsorbent bed 10 hours, toluene in waste gas is by adsorbent, form the mixture of toluene and adsorbent, purified gas is discharged by the exhaust passage 7 that purifies air; Then toluene waste gas air intake valve and the drain tap that purifies air is closed, open condenser temperature lowering water, drive saturated vapor intake valve, saturated vapor is passed into bottom adsorbent bed 1 by saturated vapor passage 6, purge adsorbent bed 80min, the mixture of toluene and water vapour, after condenser heat exchanger 2, enters condensate tank 3, obtain toluene through stratification at toluene collecting tank 4, toluene is taken out by toluene tapping channel 11.
Claims (1)
1. the waste gas purification recovery method containing the purification recovery device of toluene waste gas, it is characterized in that, containing the waste gas of toluene through adsorbent bed (1), form Purge gas and the filler containing toluene, Purge gas is discharged by the exhaust passage that purifies air (7), filler containing toluene enters condensate tank (3) by condensing heat exchanger (2) afterwards by the purging of saturated vapor and carries out layering, and isolating toluene, to enter toluene collecting tank (4) for subsequent use;
Be 40-60 DEG C containing toluene mist temperature;
The time that toluene waste gas continues through adsorbent bed (1) is 6-10 hour;
Be 0.6-1.2m/s containing toluene mist flow velocity;
The time that saturated vapor purges is 50-70min;
Containing the purification recovery device of toluene waste gas, comprise adsorbent bed (1), adsorbent bed (1) bottom is connected with toluene waste gas passage (5) and saturated vapor passage (6) by pipeline; Adsorbent bed (1) top is provided with the exhaust passage that purifies air (7), and the exhaust passage that purifies air (7) are connected with condensing heat exchanger (2) by pipeline; Condensing heat exchanger (2) connects cooling water backwater channel (9), cooling water intake tunnel (10) and emptying passage (8); Condensing heat exchanger (2) bottom is connected with condensate tank (3) by pipeline; Condensate tank (3) bottom is connected with toluene collecting tank (4) top by pipeline, and toluene collecting tank (4) bottom is provided with reclaims toluene tapping channel (11);
Adsorbent bed (1) is built with filler;
Filler is XDA-8 polymeric adsorbent;
Employing containing the concrete steps of the waste gas purification recovery method of the purification recovery device of toluene waste gas is:
Mist containing toluene is entered from adsorbent bed (1) bottom by toluene waste gas passage (5), the filled absorption of toluene, and form the filler containing toluene, the Purge gas after purification is discharged by the exhaust passage that purifies air (7); Then saturated vapor is passed into from adsorbent bed (1) bottom by saturated vapor passage (6), purge adsorbent bed (1), form the gaseous mixture of toluene and steam, the gaseous mixture of toluene and steam is after condenser heat exchanger (2), enter condensate tank (3), obtain toluene through stratification at toluene collecting tank (4), toluene is taken out by toluene tapping channel (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310152454.6A CN103223287B (en) | 2013-04-27 | 2013-04-27 | Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method |
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| CN201310152454.6A CN103223287B (en) | 2013-04-27 | 2013-04-27 | Purifying and recovering device of exhaust gas comprising toluene, and exhaust gas purifying and recovering method |
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| CN103223287B true CN103223287B (en) | 2015-05-06 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103394248B (en) * | 2013-08-03 | 2015-07-22 | 河北联合大学 | Method used for processing waste gas containing benzene series volatile organic compounds by adsorbent resins |
| CN105949024B (en) * | 2016-05-14 | 2019-02-22 | 宁波市天普橡胶科技有限公司 | A kind of toluene recovery device of rubber tube extruding production line |
| 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 |
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| CN101077850A (en) * | 2006-05-25 | 2007-11-28 | 林文默 | Method for recovering toluene |
| CN101125274A (en) * | 2006-08-17 | 2008-02-20 | 蔡志煌 | Method for recovering organic waste gas |
| CN101376069A (en) * | 2008-09-24 | 2009-03-04 | 山东金正大生态工程股份有限公司 | Process and device for recovering solvent-containing tail gas in production of control sustained-release fertilizer with envelope |
| CN201404758Y (en) * | 2009-05-16 | 2010-02-17 | 福建高科环保研究院有限公司 | Complete toluene organic exhaust gas recovery equipment |
| CN202315381U (en) * | 2011-10-27 | 2012-07-11 | 南京都乐制冷设备有限公司 | Device for recovering benzene type organic vapor in two stages |
| CN203227402U (en) * | 2013-04-27 | 2013-10-09 | 山东新华制药股份有限公司 | Device for treating toluene-containing exhaust gas by employing adsorption method |
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2013
- 2013-04-27 CN CN201310152454.6A patent/CN103223287B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077850A (en) * | 2006-05-25 | 2007-11-28 | 林文默 | Method for recovering toluene |
| CN101125274A (en) * | 2006-08-17 | 2008-02-20 | 蔡志煌 | Method for recovering organic waste gas |
| CN101376069A (en) * | 2008-09-24 | 2009-03-04 | 山东金正大生态工程股份有限公司 | Process and device for recovering solvent-containing tail gas in production of control sustained-release fertilizer with envelope |
| CN201404758Y (en) * | 2009-05-16 | 2010-02-17 | 福建高科环保研究院有限公司 | Complete toluene organic exhaust gas recovery equipment |
| CN202315381U (en) * | 2011-10-27 | 2012-07-11 | 南京都乐制冷设备有限公司 | Device for recovering benzene type organic vapor in two stages |
| CN203227402U (en) * | 2013-04-27 | 2013-10-09 | 山东新华制药股份有限公司 | Device for treating toluene-containing exhaust gas by employing adsorption method |
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