CN201551942U - Device for recycling organic solvent from waste gas - Google Patents
Device for recycling organic solvent from waste gas Download PDFInfo
- Publication number
- CN201551942U CN201551942U CN200920268874XU CN200920268874U CN201551942U CN 201551942 U CN201551942 U CN 201551942U CN 200920268874X U CN200920268874X U CN 200920268874XU CN 200920268874 U CN200920268874 U CN 200920268874U CN 201551942 U CN201551942 U CN 201551942U
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- absorption tower
- organic solvent
- spray thrower
- absorbent
- molecular sieve
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Abstract
The utility model discloses a device for recycling organic solvent from waste gas, comprising an absorption tower, an adsorption tank and a heating and regenerating mechanism, wherein a spray thrower with a spray head facing downwards is arranged in the absorption tower; after entering the absorption tower from the lower part, the waste gas is processed by spraying and then turned into clean gas to be discharged from the top of the absorption tower, and spraying liquid is an absorbent; a molecular sieve is arranged in the adsorption tank, an outlet of the adsorption tank is connected with the spray thrower by a pipeline, and an inlet is connected with liquid discharged from the lower part of the absorption tower so as to lead the absorbent containing the organic solvent to flow through the adsorption tank; and after the organic solvent is adsorbed by the molecular sieve, the absorbent enters the absorption tower again to carry out spraying operation; and by heating the molecular sieve adsorbing the organic solvent through the heating and regenerating mechanism, the organic solvent can be obtained, and the molecular sieve can be recycled to be reutilized. The device can reduce huge amount of energy consumption and can avoid huge amount of energy consumption caused by the absorption method currently utilized for absorbing the organic solvent as well as the problem of difficult regeneration after utilizing the adsorption method for adsorption.
Description
Technical field
The present invention relates to the waste gas recycling and processing device, be specially a kind of device that from waste gas, reclaims organic solvent.
Background technology
Common waste gas processing method is two kinds, and a kind of for utilizing the organic solvent in the sorbing material absorption waste gas, another kind of for utilizing the organic solvent in the absorption process absorption waste gas, waste gas is discharged through becoming clean gas after these two kinds of methods.
For the organic solvent that utilizes in the sorbing material absorption waste gas, the problem that we face is that sorbing material can discharge a large amount of heats in the process of absorption, therefore, when the organic solvent concentration in the waste gas reaches certain ratio, the danger that the adsorbent bed temperature sharply raises can appear, so that the adsorption capacity of sorbing material descended significantly even lose adsorption capacity, in addition, utilize absorption method directly from waste gas, to adsorb organic solvent, because it is big to handle gas flow, adsorbent bed is difficult to make and operation under vacuum state.
Utilize traditional absorption process, the supporting use of absorption tower and desorber need be set, after absorbent absorbs certain amount of organic solvent, need that absorbent is sent into desorber and carry out desorb, traditional desorption mode is a heat treatment process, contain the enough low clean gas of organic solvent for guaranteeing that waste gas becomes after treatment, the concentration that absorbs the organic solvent of the absorbent behind the organic solvent in the waste gas is generally all lower, the concentration ratio of organic solvent of absorbent that promptly is sent to desorber is lower, therefore, need the higher energy of consumption rate could reclaim certain amount of organic solvent.Such as, utilize water to absorb and handle when containing the waste gas of DMAC, the concentration that absorbs organic solvent in the water of back is generally about 10%, because the boiling point of DMAC is about 160 ℃, for water is separated with DMAC, must be with a large amount of water evaporations, the theoretical energy consumption that 1 kilogram of purity of every acquisition need consume than higher DMAC is not less than 8600 kilocalories, promptly whenever obtains 1 ton of DMAC and need consume 12 tons of steam.For another example, overseas utilization DOP or similarly plasticizer handle when containing the organic exhaust gas of toluene as absorbent, toluene level just must be regenerated absorbent near 1% o'clock in the absorbent, in regenerator for toluene is separated with absorbent, the mixture of absorbent and toluene must be heated to about 110 ℃, per minute is not less than 6050 kilocalories from the energy consumption that 1 kilogram of toluene needs, and promptly whenever obtains 1 ton of toluene and need consume 10 tons of steam.
Summary of the invention
The objective of the invention is to advantage, propose a kind of new device that from waste gas, reclaims organic solvent in conjunction with conventional absorption process and conventional absorption method.
Technical scheme of the present invention is achieved in that
From waste gas, reclaim the device of organic solvent, comprise absorption tower, adsorption tanks, thermal regeneration mechanism, wherein:
Shower nozzle spray thrower down is set in the absorption tower, and waste gas enters the absorption tower and discharges from the top, absorption tower through becoming clean gas after spraying from the bottom, and spray liquid is an absorbent:
The built-in molecular sieve of adsorption tanks, adsorption tanks are by pipeline, and outlet links to each other with spray thrower, import and bottom, absorption tower are discharged liquid phase and are connected, make the absorbent stream that contains organic solvent through adsorption tanks, organic solvent by molecular sieve adsorption after, absorbent is from newly entering the operation of absorption tower spray;
Thermal regeneration mechanism is adsorbed with the molecular sieve of organic solvent by heating, thereby obtains organic solvent, and molecular sieve is capable of circulation to be utilized again.
Two-layer spray thrower is set in the absorption tower, be spray thrower A, spray thrower B, wherein, spray thrower A is on the top of spray thrower B, adsorption tanks pass through pipeline, outlet links to each other with spray thrower A, the absorption tower links to each other with a looped pipeline by valve body, the import of described looped pipeline and adsorption tanks import are discharged liquid phase by blower fan, cooler and bottom, absorption tower and are connected, the outlet of looped pipeline links to each other with spray thrower B, the absorbent that looped pipeline flows into spray thrower B is the absorbent of semi-saturation state, thereby reaches the purpose of waste gas being carried out the secondary absorption cleaning.
Adsorption tanks are two or more parallel connections.
When organic solvent was methyl alcohol, absorbent was an ethylene glycol phenyl ether, and molecular sieve is the ZSM5 type molecular sieve of high silicon.
When organic solvent was DMAC, absorbent was a water, and molecular sieve is the BETA type molecular sieve of high silicon.
When organic solvent was butanone, absorbent was a water, and molecular sieve is the ZSM5 type molecular sieve of high silicon.
When organic solvent is toluene, absorbent is high boiling organic solvents such as N-methyl pyrrolidone, fatty acid methyl ester, white oil, ethylene glycol phenyl ether acetate or other plasticizer, the molecular diameter of the organic solvent that the diameter of molecular sieve separates greater than needs and less than the molecular diameter of high boiling organic solvent.
The present invention is in conjunction with the advantage of conventional absorption process and conventional absorption method, utilize the absorption tower that organic solvent is absorbed earlier, utilize adsorption tanks that organic solvent is adsorbed then, the absorbent reusable edible, can obtain organic solvent behind the thermal regeneration molecular sieve, this device can be saved a large amount of energy resource consumptions, can improve utilize absorption process to absorb a large amount of energy consumptions that organic solvent expends at present and utilize absorption method absorption after the difficult problem of regeneration.
The present invention is further illustrated below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
The specific embodiment
The present invention is the device that reclaims organic solvent from waste gas, as shown in Figure 1, comprises absorption tower 1, adsorption tanks 2, thermal regeneration mechanism 3, wherein:
Shower nozzle spray thrower A, spray thrower B down is set in the absorption tower 1, wherein, spray thrower A is on the top of spray thrower B, adsorption tanks 2 pass through pipeline, outlet links to each other with spray thrower A, absorption tower 1 also links to each other with a looped pipeline 4 by valve body, the import of described looped pipeline 4 and adsorption tanks 2 imports are discharged liquid phase by blower fan 5, cooler 6 with 1 bottom, absorption tower and are connected, the outlet of looped pipeline 4 links to each other with spray thrower B, the absorbent that looped pipeline 4 flows into spray thrower B is the absorbent of semi-saturation state, and the absorbent that adsorption tanks 2 flow into spray thrower A is the absorbent of cycling and reutilization.
During operation, waste gas enters absorption tower 1 from the bottom, through spray thrower B one-level spray, discharges at 1 top from the absorption tower through becoming clean gas behind the spray thrower A secondary spray again.
Adsorption tanks 2 built-in molecular sieves, the molecular sieve property selected absorption organic solvent makes the absorbent stream that contains organic solvent behind adsorption tanks 2, and absorbent is from newly entering absorption tower 1 spray operation; Adsorption tanks 2 are two or more parallel connections, as shown in the figure, and adsorption tanks 21,22, two adsorption tanks alternately operatings of adsorption tanks.
Thermal regeneration mechanism 3 is adsorbed with the molecular sieve of organic solvent by heating, thereby obtains organic solvent, and molecular sieve is capable of circulation to be utilized again.
Embodiment one:
From the waste gas that contains DMAC, reclaim DMAC:
The absorbent of selecting for use when reclaiming DMAC is a water, and molecular sieve is the BETA type molecular sieve of high silicon, and when experiment showed in water DMAC content 2%, high silicon BETA type molecular sieve can surpass 15% of himself weight to the adsorbance of DMAC.Technical scheme of the present invention institute consumption energy consumption is 1/3 of a tradition absorption-desorption method institute consumption energy consumption, and technical scheme of the present invention, the concentration of DMAC maintains lower level all the time in the water, and the contained after treatment DMAC concentration ratio of waste gas tradition absorption-desorption mode is much lower.Can to take absorbent be water to nearly all water-miscible organic solvent except toluene, and molecular sieve is the similar scheme of the BETA type molecular sieve of high silicon.
Embodiment two:
From the waste gas that contains butanone, reclaim butanone:
The absorbent of selecting for use when reclaiming butanone is a water, and molecular sieve is the ZSM5 type molecular sieve of high silicon, and when experiment showed in water butanone content 2%, high-silicon ZSM-5 5 type molecular sieves can surpass 10% of himself weight to the adsorbance of butanone.Technical scheme of the present invention institute consumption energy consumption is 1/3 of a tradition absorption-desorption method institute consumption energy consumption.
Embodiment three:
From the waste gas that contains methyl alcohol, reclaim methyl alcohol:
When from the waste gas that contains methyl alcohol, reclaiming methyl alcohol, the absorbent of selecting is an ethylene glycol phenyl ether, and molecular sieve is the ZSM5 type molecular sieve of high silicon, and when experiment showed in ethylene glycol phenyl ether methanol content 2% left and right sides, high-silicon ZSM-5 5 type molecular sieves can surpass 10% of himself weight to the adsorbance of methyl alcohol.Technical scheme of the present invention institute consumption energy consumption is about 1/5 of a traditional active carbon adsorption treatment method institute consumption energy consumption.
Embodiment four:
From the waste gas that contains toluene, reclaim toluene:
When from the waste gas that contains toluene, reclaiming toluene, the absorbent of selecting can be: high boiling organic solvents such as N---methyl pyrrolidone, fatty acid methyl ester, white oil, ethylene glycol phenyl ether acetate or other plasticizer, the diameter of molecular sieve is at the molecular sieve on the 6 Izod right sides, when experiment showed in absorbent toluene level 2% left and right sides, molecular sieve can surpass 10% of himself weight to the adsorbance of toluene.Technical scheme of the present invention institute consumption energy consumption is about 1/5 of a tradition absorption-desorption method institute consumption energy consumption.
Claims (5)
1. from waste gas, reclaim the device of organic solvent, it is characterized in that: comprise absorption tower, adsorption tanks, thermal regeneration mechanism, wherein:
Shower nozzle spray thrower down is set in the absorption tower, and waste gas enters the absorption tower and discharges from the top, absorption tower through becoming clean gas after spraying from the bottom, and spray liquid is an absorbent:
The built-in molecular sieve of adsorption tanks, adsorption tanks are by pipeline, and outlet links to each other with spray thrower, import and bottom, absorption tower are discharged liquid phase and are connected, make the absorbent stream that contains organic solvent through adsorption tanks, organic solvent by molecular sieve adsorption after, absorbent is from newly entering the operation of absorption tower spray;
Thermal regeneration mechanism is adsorbed with the molecular sieve of organic solvent by heating, thereby obtains organic solvent, and molecular sieve is capable of circulation to be utilized again.
2. device according to claim 1 is characterized in that: two-layer spray thrower is set in the absorption tower, is respectively spray thrower A, spray thrower B, described spray thrower A is on the top of spray thrower B, and adsorption tanks are by pipeline, and outlet links to each other with spray thrower A; The absorption tower links to each other with a looped pipeline by valve body, the import of described looped pipeline and bottom, absorption tower are discharged liquid phase and are connected, the outlet of looped pipeline links to each other with spray thrower B, and the absorbent that looped pipeline flows into spray thrower B is the absorbent of semi-saturation state, thereby reaches the purpose of waste gas being carried out the secondary absorption cleaning.
3. device according to claim 1 is characterized in that: the bottom, absorption tower is discharged between liquid outlet and the adsorption tanks import cooler and blower fan is set.
4. device according to claim 2 is characterized in that: the bottom, absorption tower is discharged between liquid outlet and adsorption tanks import and the looped pipeline import cooler and blower fan is set.
5. according to the described device of arbitrary claim in the claim 1 to 4, it is characterized in that: adsorption tanks are two or more parallel connections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920268874XU CN201551942U (en) | 2009-10-28 | 2009-10-28 | Device for recycling organic solvent from waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920268874XU CN201551942U (en) | 2009-10-28 | 2009-10-28 | Device for recycling organic solvent from waste gas |
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| Publication Number | Publication Date |
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| CN201551942U true CN201551942U (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920268874XU Expired - Lifetime CN201551942U (en) | 2009-10-28 | 2009-10-28 | Device for recycling organic solvent from waste gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101703869B (en) * | 2009-10-28 | 2012-11-21 | 马军 | New method and device for recovering organic solvent from waste gas |
-
2009
- 2009-10-28 CN CN200920268874XU patent/CN201551942U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101703869B (en) * | 2009-10-28 | 2012-11-21 | 马军 | New method and device for recovering organic solvent from waste gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100818 Effective date of abandoning: 20091028 |
|
| RGAV | Abandon patent right to avoid regrant |