CN103223287A - 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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- CN103223287A CN103223287A CN2013101524546A CN201310152454A CN103223287A CN 103223287 A CN103223287 A CN 103223287A CN 2013101524546 A CN2013101524546 A CN 2013101524546A CN 201310152454 A CN201310152454 A CN 201310152454A CN 103223287 A CN103223287 A CN 103223287A
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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 treatment of waste gas, particularly a kind of purification recovery device and waste gas purification recovery method thereof that contains toluene waste gas.
Background technology
In industrial production, toluene is widely used in the medication chemistry industry as excellent solvent, and for a long time, people are devoted to toluene waste gas always and administer Study on Technology.Toluene belongs to precursor chemicals, low toxicity, median lethal dose rat, per os 5000mg/kg.High concentration gas has narcoticness.Excitant is arranged.If directly discharging has serious harm to environment, can pollute air, water environment and water source.Human body sucks neurasthenic syndrome can take place, hepatomegaly, woman worker's menoxenia etc.As far back as nineteen twenty-five Europe just develop the fixed bed absorbent charcoal adsorber, Japan also brought into use this technology in 1958.Charcoal absorption is a kind of very classical, ripe method, can be used for administering the normal temperature organic exhaust gas of multiple concentration, but when handling low concentration, big air quantity organic exhaust gas, equipment is huge, and is uneconomical.Up to the present, people oneself develop a series of fruitful control technologys after deliberation.VOC VOCs purification techniques can be divided into recovery substantially and eliminate two classes, absorption method mainly contains absorption method, condensation method, absorption process and membrane separation process, by physical method, utilize temperature, selective absorber and permoselective membrane to wait and separate the recovery organic solvent.Null method has technology such as thermal oxide, catalytic combustion, biological oxidation, mainly is 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 factories discharging still surpasses discharge standard; Though the emission compliance that has, disposal cost are too high.People are seeking toluene waste gas purification and recovery method simple to operate, that cost is low, effective always for this reason.
Xinhua pharmacy hormone series of products Wo Shi oxidation post widely applies toluene as solvent, in solvent transfer, decompression concentration process, produce a large amount of toluene waste gas, this waste gas toluene concentration is on average about 500ppm, company adopts methods such as spray absorption process, active carbon adsorption, cooling method to contain the improvement of toluene waste gas, effect is all undesirable, does not reach discharge standard, causes Production Regional toluene peculiar smell obvious, the worker suffered worker's strong reaction around the operator reached.Adopt new method to handle and contain the striving direction that toluene waste gas is workshop and environmental administration of company always.
Summary of the invention
The purpose of this invention is to provide a kind of purification recovery device and waste gas purification recovery method thereof that contains toluene waste gas, simple to operate, easy to operate, the waste gas that operating cost is low, purification contains toluene is effective, reaches discharge standard.
The purification recovery device that contains toluene waste gas of the present invention comprises adsorbent bed, and the adsorbent bed bottom is connected with the saturated vapor passage with the toluene waste gas passage by pipeline; 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; The condensing heat exchanger bottom is connected with the condensate liquid storage tank by pipeline; Condensate liquid storage tank bottom is connected with toluene collecting tank top by pipeline, and toluene collecting tank bottom is provided with reclaims the toluene tapping channel.
Filler is housed in the adsorbent bed.
Described filler is the XDA-8 polymeric adsorbent.
On toluene waste gas passage, saturated vapor passage, the exhaust passage that purifies air, emptying passage, cooling water intake tunnel and the recovery toluene discharging opening passage valve is set.
Employing contains the purification recovery device and the waste gas purification recovery method thereof of toluene waste gas, the waste gas that contains toluene is through adsorbent bed, form Purge gas and the filler that contains toluene, Purge gas is discharged by the exhaust passage that purifies air, the filler that contains toluene enters the condensate liquid storage tank by condensing heat exchanger after by the purging of saturated vapor and carries out layering, and isolating toluene, to enter the toluene collecting tank standby.
Containing toluene mist temperature is 40-60 ℃.
Toluene waste gas is 6-10 hour by the time of adsorbent bed continuously.
The 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 is:
The mist that contains toluene enters from the adsorbent bed bottom by the toluene waste gas passage, and toluene is formed the filler that contains toluene by filling adsorption, and the Purge gas after the purification is discharged by the exhaust passage that purifies air; Saturated vapor feeds from the adsorbent bed bottom by the saturated vapor passage then, purge adsorbent bed, form the gaseous mixture of toluene and steam, behind the gaseous mixture process condenser heat exchanger of toluene and steam, enter the condensate liquid storage tank, obtain toluene through standing demix at the toluene collecting tank, toluene takes out by the toluene tapping channel.
Compared with prior art, the present invention has following beneficial effect:
The present invention contains the purification recovery device and the waste gas purification recovery method thereof of toluene waste gas, and device is simple, and is easy to operate, and the waste gas that operating cost is low, purification contains toluene is effective, reaches discharge standard.
Description of drawings
Fig. 1 is the purification recovery device that contains toluene waste gas;
Wherein, 1, adsorbent bed, 2, condensing heat exchanger, 3, condensate liquid storage tank, 4, toluene collecting tank, 5, the toluene waste gas passage, 6, the saturated vapor passage, 7, the exhaust passage purifies air, 8, emptying passage, 9, the cooling water backwater channel, 10, the cooling water intake tunnel, 11, the toluene tapping channel.
The specific embodiment
Below in conjunction with embodiment the present invention is described further.
Embodiment 1
The purification recovery device that contains toluene waste gas as shown in Figure 1 comprises adsorbent bed 1, and adsorbent bed 1 bottom is connected with saturated vapor passage 6 with toluene waste gas passage 5 by pipeline, in the adsorbent bed 1 filler is housed; 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 bottoms are connected with condensate liquid storage tank 3 by pipeline; Condensate liquid storage tank 3 bottoms are connected with toluene collecting tank 4 tops by pipeline, and toluene collecting tank 4 bottoms are provided with reclaims toluene tapping channel 11.
Described filler is the XDA-8 polymeric adsorbent.
On 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 the recovery toluene discharging opening passage 11 valve is set.
The adsorbent bed parameter is: tower height 2800mm, and tower diameter 800mm, filler floor height 2000mm, filler are the XDA-8 polymeric adsorbent.
Employing contains the waste gas purification recovery method of the purification recovery device of toluene waste gas, 40 ℃ of waste gas that contains toluene with the flow velocity of 0.6m/s through adsorbent bed 7 hours, form Purge gas and the filler that contains toluene, Purge gas is discharged by the exhaust passage that purifies air, the filler that contains toluene enters the condensate liquid storage tank by condensing heat exchanger after by the purging 150min of saturated vapor and carries out layering, and isolating toluene, to enter the toluene collecting tank standby.
The concrete steps of waste gas purification recovery method that employing contains the purification recovery device of toluene waste gas are:
Open the toluene waste gas air intake valve, open the drain tap that purifies air, 40 ℃ the mist that contains toluene enters from adsorbent bed 1 bottom by toluene waste gas passage 5 with the flow velocity of 0.6m/s, passed through adsorbent bed 7 hours continuously, toluene in the waste gas is adsorbed agent absorption, formation contains the filler of toluene, and the Purge gas after the purification is discharged by the exhaust passage 7 that purifies air; Close the toluene waste gas air intake valve then and the drain tap that purifies air, open condenser cooling water, drive the saturated vapor intake valve, saturated vapor feeds from adsorbent bed 1 bottom by saturated vapor passage 6, purge adsorbent bed 150min, behind the mixture process condenser heat exchanger 2 of toluene and water vapour, enter condensate liquid storage tank 3, obtain toluene through standing demix at toluene collecting tank 4, toluene takes out by toluene tapping channel 11.
It is identical with embodiment 1 that absorption method is handled the device that contains toluene waste gas.
Employing contains the waste gas purification recovery method of the purification recovery device of toluene waste gas, 60 ℃ of waste gas that contains toluene with the flow velocity of 1.1m/s through adsorbent bed 10 hours, form Purge gas and the filler that contains toluene, Purge gas is discharged by the exhaust passage that purifies air, the filler that contains toluene enters the condensate liquid storage tank by condensing heat exchanger after by the purging 80min of saturated vapor and carries out layering, and isolating toluene, to enter the toluene collecting tank standby.
The concrete steps of waste gas purification recovery method that employing contains the purification recovery device of toluene waste gas are:
Open the toluene waste gas air intake valve, open the drain tap that purifies air, 60 ℃ the mist that contains toluene enters from adsorbent bed 1 bottom by toluene waste gas passage 5 with the flow velocity of 1.1m/s, passed through adsorbent bed 10 hours continuously, toluene in the waste gas is adsorbed agent absorption, form the mixture of toluene and adsorbent, purified gas is discharged by the exhaust passage 7 that purifies air; Close the toluene waste gas air intake valve then and the drain tap that purifies air, open condenser cooling water, drive the saturated vapor intake valve, saturated vapor feeds from adsorbent bed 1 bottom by saturated vapor passage 6, purge adsorbent bed 80min, behind the mixture process condenser heat exchanger 2 of toluene and water vapour, enter condensate liquid storage tank 3, obtain toluene through standing demix at toluene collecting tank 4, toluene takes out by toluene tapping channel 11.
Claims (10)
1. a purification recovery device that contains toluene waste gas is characterized in that, comprises adsorbent bed (1), and adsorbent bed (1) bottom is connected with saturated vapor passage (6) with toluene waste gas passage (5) 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 liquid storage tank (3) by pipeline; Condensate liquid storage 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).
2. the purification recovery device that contains toluene waste gas according to claim 1 is characterized in that, adsorbent bed is equipped with filler in (1).
3. the purification recovery device that contains toluene waste gas according to claim 2 is characterized in that, filler is the XDA-8 polymeric adsorbent.
4. the purification recovery device that contains toluene waste gas according to claim 1, it is characterized in that, on toluene waste gas passage (5), saturated vapor passage (6), the exhaust passage that purifies air (7), emptying passage (8), cooling water intake tunnel (10) and the recovery toluene discharging opening passage (11) valve is set.
5. one kind is adopted the described waste gas purification recovery method that contains the purification recovery device of toluene waste gas of claim 1, it is characterized in that, the waste gas that contains toluene is through adsorbent bed (1), form Purge gas and the filler that contains toluene, Purge gas is discharged by the exhaust passage that purifies air (7), the filler that contains toluene enters condensate liquid storage tank (3) by condensing heat exchanger (2) after by the purging of saturated vapor and carries out layering, and isolating toluene, to enter toluene collecting tank (4) standby.
6. the waste gas purification recovery method that contains the purification recovery device of toluene waste gas according to claim 5 is characterized in that, containing toluene mist temperature is 40-60 ℃.
7. the waste gas purification recovery method that contains the purification recovery device of toluene waste gas according to claim 5 is characterized in that, toluene waste gas is 6-10 hour by the time of adsorbent bed (1) continuously.
8. the waste gas purification recovery method that contains the purification recovery device of toluene waste gas according to claim 5 is characterized in that, containing toluene mist flow velocity is 0.6-1.2m/s.
9. the waste gas purification recovery method that contains the purification recovery device of toluene waste gas according to claim 5 is characterized in that, the time that saturated vapor purges is 50-70min.
10. the waste gas purification recovery method that contains the purification recovery device of toluene waste gas according to claim 5 is characterized in that, adopts the concrete steps of the waste gas purification recovery method of the purification recovery device that contains toluene waste gas to be:
The mist that contains toluene enters from adsorbent bed (1) bottom by toluene waste gas passage (5), and toluene is formed the filler that contains toluene by filling adsorption, and the Purge gas after the purification is discharged by the exhaust passage that purifies air (7); Saturated vapor feeds from adsorbent bed (1) bottom by saturated vapor passage (6) then, purge adsorbent bed (1), form the gaseous mixture of toluene and steam, behind the gaseous mixture process condenser heat exchanger (2) of toluene and steam, enter condensate liquid storage tank (3), obtain toluene through standing demix at toluene collecting tank (4), toluene takes out by toluene tapping channel (11).
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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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103394248A (en) * | 2013-08-03 | 2013-11-20 | 河北联合大学 | Method used for processing waste gas containing benzene series volatile organic compounds by adsorbent resins |
| CN105949024A (en) * | 2016-05-14 | 2016-09-21 | 宁波市天普橡胶科技有限公司 | Methylbenzene recycling device of rubber pipe 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 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103394248A (en) * | 2013-08-03 | 2013-11-20 | 河北联合大学 | Method used for processing waste gas containing benzene series volatile organic compounds by adsorbent resins |
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| CN105949024A (en) * | 2016-05-14 | 2016-09-21 | 宁波市天普橡胶科技有限公司 | Methylbenzene recycling device of rubber pipe extruding production line |
| 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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| CN103223287B (en) | 2015-05-06 |
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