CN204816134U - Organic solvent's recovery unit - Google Patents
Organic solvent's recovery unit Download PDFInfo
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- CN204816134U CN204816134U CN201520552129.3U CN201520552129U CN204816134U CN 204816134 U CN204816134 U CN 204816134U CN 201520552129 U CN201520552129 U CN 201520552129U CN 204816134 U CN204816134 U CN 204816134U
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Abstract
The utility model discloses an organic solvent's recovery unit, including nested tuber pipe, silicon oil groove, oil pump and cooling heat exchanger, nested tuber pipe includes air -out tuber pipe and air inlet tuber pipe, air -out tuber pipe cover establish among the air inlet tuber pipe or air inlet tuber pipe cover establish among the air -out tuber pipe formation nested tuber pipe, the one end of nested tuber pipe be used for with stoving case intercommunication, the other end of nested tuber pipe with silicon oil groove intercommunication, be provided with the section of spraying in the air inlet tuber pipe, the oil pump passes through oil pipe will silicon oil pump in the silicon oil groove is gone into extremely the section of spraying the section of spraying and nested tuber pipe be used for and that one end of stoving case intercommunication between be provided with the cooling heat exchanger, the cooling heat exchanger is located in the air inlet tuber pipe. The solvent gas that coating production line stoving in -process evaporates out can be retrieved in succession to this device, and the resolving of solvent leans on the automatic realization of action of gravity under microthermal condition to it retrieves to have guaranteed the high -efficient of solvent.
Description
Technical field
The utility model relates to the recovery of organic solvent in waste gas, be applicable to the recycling and processing device of the organic solvent in the waste gas be evaporated in tinuous production drying course, be particularly suitable for the recovery of the polar organic solvent be evaporated in printing plate production line production process.
Background technology
Relate to the use of solvent in industrial processes in a large number, particularly apply production, comprise and spray paint, make circuit board, produce printing plate etc.Usually need, by raw material dissolution with solvents wiring solution-forming, then to adopt suitable technique to be applied by the solution of preparation, then carry out drying and processing.
In the process that the product applied is dried, dissolve raw material solvent used and become steam and enter in the middle of air.Air containing solvent is processed, the modes such as burning, absorption, purification can be adopted, reduce or eliminate the pollution to environment.
Solvent-laden waste gas is carried out burning disposal, direct-fired, catalysis type or RTO heat accumulating type (RegenerativeThermalOxidizer can be adopted, regenerator oxidator) etc. method, by high temperature, the organic component that can burn in waste water is changed into water, carbon dioxide etc., such as, disclose a kind of RTO heat accumulation type off-gas burning treatment facility in Chinese patent CN102519049, comprise the unit such as waste gas purification burning, waste heat recovery, fume treatment, clean and maintenance can be easy to lower energy consumption consumption process waste gas, simultaneously heat storage.But the method directly can not realize the recycling of solvent, combustion process needs to consume the more energy, generally based on natural gas auxiliary heating usually.
Adopt adsorption method to the process of waste gas, generally can take into account the recycling of solvent components.The adsorbing medium that can adopt comprises active carbon, fibre active carbon, molecular sieve etc.Disclose a kind of device using active carbon to carry out exhaust-gas treatment and recovery in Chinese patent CN101301557, adopt desorption by heating mode to realize automatic regeneration.Organic exhaust gas adopts charcoal absorption, can reach the purifying rate of more than 95%, but active carbon is easy to reach capacity, and changes frequent, adds the working procedures such as handling, transport, replacing, cause operating cost to increase.
It is adsorbing medium that Chinese patent CN101301558 discloses a kind of activated carbon fiber, take nitrogen as the waste gas treatment process of desorption medium.Chinese patent CN104084357 discloses a kind of use heat pump and molecular sieve runner Combined Treatment organic exhaust gas, realizes the exhaust-gas treatment mode of solvent recovery.Use fibre active carbon or extraordinary molecular sieve adsorption organic exhaust gas, after adsorbing medium is saturated close to absorption, available superheated steam carries out blowback, realizes the desorption and regeneration of sorbing material, thus can automatically run continuously, avoids the artificial replacement operation of material.By blowback organic exhaust gas out, because solvent is higher, condensing mode can be adopted to recycle.
When organic exhaust gas is dense, also can adopts the mode of direct condensation, solvent is reclaimed, but generally, produce in the waste gas of discharge, solvent strength all can not reach even also can not close to saturation state, and the effect that cannot reach expectation is reclaimed in condensation.Need to carry out concentration by suction type to the solvent in waste gas.
Adopt solid material adsorption method to absorb solvent components in waste gas, sorbing material is certain selective to being absorbed with of solvent, can reach good adsorption effect when material is suitable.In order to ensure that equipment long term continuous automatic is run, need to coordinate suitable desorption mode to realize the recovery of the solvent that the regeneration of sorbing material and desorption get off.Sorbing material generally has certain service life, uses the regeneration effect of sorbing material after reaching the time limit to be deteriorated, needs to upgrade overall adsorbing medium.
Adsorb the solvent in waste gas, also can adopt liquid adsorption medium, these liquid mediums can adopt water, high boiling solvent, wet goods.Chinese patent CN103084043 discloses the method for the nmp solvent adopted in water adsorbed gas, and the method has certain clean-up effect for the solvent components of the higher boiling difficulty volatilization contained in waste gas.
A kind of method and apparatus using high temperature coal-tar to carry out solvent recovery is disclosed, with the solvent absorbing, resolve and in condensing steps acquisition on-condensible gas in Chinese patent CN102489118.On-condensible gas sends into washing oil absorption plant from bottom after cooling, and washing oil contacts with on-condensible gas is reverse, and rich solvent-laden washing oil sends into washing oil resolver from top after heating up.Resolving uses saturated vapor, and realize resolving at the temperature of 120-140 DEG C, the mixed vapour after parsing obtains solvent by condensation through water-oil separating.The method equipment is complicated, absorbs and carries out with parsing substep, use high temperature saturated vapor, and heat up to the solvent-laden washing oil entirety of richness and evaporate, adopt the mode of condensed steam to add solvent, organic efficiency is low, and energy consumption is high.Meanwhile, in adsorption process, along with the increase of solvent strength in washing oil, part can be taken away by waste gas again by the solvent adsorbed, and absorption is not thorough, not good to volatile solvent components adsorption effect.
Utility model content
The utility model is intended to for the defect existing for above-mentioned prior art and deficiency, a kind of retracting device of organic solvent is provided, this device can reclaim the solvent gas be evaporated in Coating Production Line drying course continuously, the resolving of solvent automatically realizes by Action of Gravity Field under the condition of low temperature, thus ensure that the high efficiente callback of solvent, meanwhile, adsorbent energy repetitive cycling uses.
The utility model realizes by adopting following technical proposals:
A retracting device for organic solvent, is characterized in that: comprise nested airduct, silicone oil groove, oil pump and cooling heat exchanger; Described nested airduct comprises air-out airduct and air intake airduct, and air-out duct sleeve is located among air intake airduct or air intake duct sleeve is located among air-out airduct, forms described nested airduct; One end of nested airduct is used for being communicated with drying baker, and the other end of nested airduct is communicated with described silicone oil groove; Spray section is provided with in described air intake airduct, silicone oil in described silicone oil groove is pumped into described spray section by oil pipe by oil pump, be used at described spray section and nested airduct being provided with described cooling heat exchanger between that one end of being communicated with drying baker, heat exchanger of lowering the temperature is arranged in described air intake airduct.
Solvent overflow mouth is had above described silicone oil groove.
The tube wall of described air-out airduct and air intake airduct adopts aluminium, galvanized iron sheet or stainless steel, and pipe thickness is less than 5mm, in nested airduct, is formed air entering and returning heat exchange segment by the part of air intake and air-out parcel.
At air intake, the outlet air end of nested airduct, silicone oil groove or cooling heat exchanger position place are provided with thermometer.
Compared with prior art, the beneficial effect that reaches of the utility model is as follows:
1, the utility model adopts the technical scheme that nested airduct, silicone oil groove, oil pump and cooling heat exchanger are formed, employing silicone oil is adsorbing medium, utilize the incompatibility of silicone oil and polar solvent, what achieve solvent and silicone oil is separated parsing automatically, avoid the process that silicone oil heat temperature raising is resolved, equipment investment is simple, and energy consumption is low.Simultaneously, because silicone oil is operated in low temperature environment always, and it is little containing solvent to be automatically separated the silicone oil after resolving, solvent in waste gas can be adsorbed to greatest extent, the solvent components taken away by waste gas during adsorption process occurs is less, passive analytic function in adsorption process is faint, can absorb the solvent components that in waste gas, volatility is stronger.Therefore, this device is that the resolving of solvent automatically realizes by Action of Gravity Field under the condition of low temperature, thus ensure that the high efficiente callback of solvent.
Solvent recovery treating apparatus described in the utility model, is not applicable to separately offset plate material tinuous production, the exhaust-gas treatment containing polar solvent that the coating drying course for the paint formulation using polar solvent produces, and this device is suitable for effectively equally.
2, in the utility model, adopt cooling heat exchanger to carry out cooling process, the gas after cooling process is more conducive to precipitation and the washing of solvent.
3, in the utility model, the wind typical temperature containing solvent that drying baker is extracted out is higher, under some process conditions, the temperature of the wind of releasing can up to more than 100 DEG C, so high temperature, the unfavorable absorption for solvent, therefore needs to carry out cooling process to the wind of releasing.The wind simultaneously passing into baking oven often needs heating, reaches the temperature conditions that baking needed is wanted.In order to save the energy, realize recycling of resource, the wind drawing back baking oven is carried out countercurrent heat exchange process with the wind extracting baking oven out by the mode of nested airduct by the utility model, the wind of extraction baking oven is lowered the temperature, simultaneously also allow the wind drawing back baking oven be preheated, not only saved the energy but also met the requirement of technique.
4, in the utility model, have solvent overflow mouth above silicone oil groove, the solvent being convenient to parse overflows.
5, in the utility model, air-out is contrary with air intake wind direction, and intermediate interlayer adopts the thinner good metal of heat-transfer effect, and as aluminium, galvanized iron sheet, stainless steel etc., block board thickness is generally less than 5mm, is more conducive to the effect of countercurrent heat exchange.
6, in the utility model, at air intake, the outlet air end of nested airduct, silicone oil groove or cooling heat exchanger position place are provided with thermometer, can the stable operation of support equipment better.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is the retracting device structural representation of organic solvent.
Mark in figure:
1, to lower the temperature heat exchanger, 2, spray section, 3, silicone oil groove, 4, solvent overflow mouth, 5, oil pump, 6, air entering and returning exchange section, 7, air intake, 8, return air.
Detailed description of the invention
Embodiment 1
With reference to Figure of description, preferred forms of the present utility model is as follows: comprise nested airduct, silicone oil groove 3, oil pump 5 and cooling heat exchanger 1; Described nested airduct comprises air-out airduct and air intake airduct, and air-out duct sleeve is located among air intake airduct or air intake duct sleeve is located among air-out airduct, forms described nested airduct; One end of nested airduct is used for being communicated with drying baker, and the other end of nested airduct is communicated with described silicone oil groove 3; Spray section 2 is provided with in described air intake airduct, silicone oil in described silicone oil groove 3 is pumped into described spray section 2 by oil pipe by oil pump 5, be used at described spray section 2 and nested airduct being provided with described cooling heat exchanger 1 between that one end of being communicated with drying baker, heat exchanger 1 of lowering the temperature is arranged in described air intake airduct.Solvent overflow mouth 4 is had above described silicone oil groove 3.The tube wall of described air-out airduct and air intake airduct adopts aluminium, galvanized iron sheet or stainless steel, and pipe thickness is less than 5mm, in nested airduct, is formed air entering and returning heat exchange segment 6 by the part of air intake and air-out parcel.At air intake, the outlet air end of nested airduct, silicone oil groove 3 or cooling heat exchanger 1 position place are provided with thermometer.
Embodiment 2
As the utility model one embody rule example, its process is as follows:
A, solvent-laden waste gas carried out to cooling process;
B, select with described solvent is immiscible or the silicone oil of poor solubility, the solvent components in use silicone oil spray-absorption waste gas;
C, the silicone oil being adsorbed with solvent are collected in silicone oil groove 3, and the AUTOMATIC ZONING relying on the density variation of silicone oil and solvent and immiscible property to realize solvent and silicone oil is resolved;
D, analytically after silicon layer extract silicone oil again enter in step B, carry out the solvent components in spray-absorption waste gas.
More particularly:
Coating is produced in drying course to the solvent components producing waste gas and comprise, be generally the organic solvent of polarity, these solvents can comprise: cyclohexanone, methyl ethyl ketone, methyl alcohol, ethanol, propyl alcohol, butanols, ethylene glycol monoethyl ether, 1-methoxy-2-propanol, 2-methoxyethyl acetic acid esters, 1-methoxyl group-2-propyl-acetic acid ester, methyl lactate, ethyl lactate, ethyl acetate, N, N-dimethylacetylamide, N, dinethylformamide, tetramethyl is urinated, 1-METHYLPYRROLIDONE, dimethyl sulfoxide (DMSO), gamma-butyrolacton etc., but be not limited to these, these solvents can be used alone or used in combination.
In coating process of producing product, need to be used by the formula materials of coating suitable solvent components to dissolve, be made into coating solution.On the production line of working continuously, adopt suitable application pattern, comprise the technology modes such as spraying, squeezing and coating, roller coating, blade coating, liquid coating solution is coated to base material or product surface, the product of coating carries out oven for drying.In drying course, the solvent of dissolved material becomes steam under the action of heat and enters in the middle of air, for ensureing continuously normal drying effect, needing to ventilate at drying course, taking away the solvent vapo(u)r produced in drying course with wind.
Patent CN101762982 discloses a kind of production method of offset printing positive-printing heat-sensitive CTP plate material, the method comprises the surface treatment supporting aluminium to metallograph base, the aluminium material surface coating positive heat-sensitive CTP photosensitive material handled well, drying, cut, the operation such as aging obtains the positive-printing heat-sensitive CTP plate material that prints.
Solvent recovery processing mode described in this programme, is not applicable to separately offset plate material tinuous production, the exhaust-gas treatment containing polar solvent that the coating drying course for the paint formulation using polar solvent produces, and this method is suitable for effectively equally.
Coating Production Line drying course, adopts blower fan usually, the drying of expedite product, takes away the solvent vapo(u)r that drying course is evaporated simultaneously.This programme waste gas to be dealt with is the wind containing solvent vapo(u)r of releasing from drying baker.
The wind typical temperature containing solvent extracted out from drying baker is higher, and under some process conditions, the temperature of the wind of releasing can up to more than 100 DEG C, so high temperature, the unfavorable absorption for solvent, therefore needs to carry out cooling process to the wind of releasing.The wind simultaneously passing into baking oven often needs heating, reaches the temperature conditions that baking needed is wanted.In order to save the energy, realize recycling of resource, this programme by the wind drawing back baking oven with extract the wind of baking oven out by countercurrent heat exchange process, the wind of extraction baking oven is lowered the temperature, simultaneously also allow the wind drawing back baking oven be preheated, not only saved the energy but also met the requirement of technique.
Specific implementation adopts nested air duct structure, and air-out airduct is at center, and air intake (return air) airduct, also can be contrary in periphery, comes periphery by outside air-out airduct, and air intake (return air) airduct is at center.Air-out is contrary with air intake wind direction, and intermediate interlayer adopts the thinner good metal of heat-transfer effect, and as aluminium, galvanized iron sheet, stainless steel etc., block board thickness is generally less than 5mm.
This programme adopts silicone oil to carry out adsorption treatment to the solvent extracted out in waste gas, and in general, lower EGT is more conducive to precipitation and the washing of solvent, the wind of extraction can not be reduced to very low temperature by the countercurrent heat exchange of aforementioned air intake and air-out.For this reason, the wind of extraction further to be lowered the temperature process through the heat exchange effect of surface cooler by this programme, and the temperature after heat exchange can be reduced to less than 25 DEG C even lower.For the stable operation of support equipment better, can install monitoring temperature in the position needed, these positions comprise monitoring temperature, silicone oil groove 3 monitoring temperature, return air temperature monitoring etc. before and after leaving air temp monitoring, surface cooler.
The absorption silicone oil that this programme adopts is high temperature resistant, good stability, viscosity is high, not volatile and with the silicone oil of the immiscible solution of adsorbed polar organic solvent.Comprise methyl-silicone oil, ethyl silicon oil, phenyl silicone oil, Methyl Hydrogen Polysiloxane Fluid, methyl phenyl silicone oil, methylchlorophenyl silicone oil, MethylethoxylsiliconFluid Fluid, methyl trifluoro propyl silicone oil, methylhydroxy silicone oil, ethyl containing hydrogen silicone oil, hydroxyl hydrogen silicone oil etc.In order to ensure that the separation resolving of solvent can be carried out under cryogenic automatically, selected silicone oil and the solvent that will adsorb are immiscible or dissolubility is bad.
Solvent adsorption process described in this programme, adopts oil pump 5 that silicone oil is squeezed into spray section 2, and when waste gas is through spray section 2, the solvent in waste gas is by the absorption of silicone oil parcel, and the silicone oil being adsorbed with solvent flows back to silicone oil groove 3 by pipeline.By the waste gas after silicone oil drip washing absorption, process after filtration, production line can be returned and reuse, directly discharge or combust discharge.Technique allows, and when can reuse, preferably recycles the waste gas after absorption.
The key character of this programme is the separation resolving of solvent to make use of density variation and the objectionable intermingling of solvent and silicone oil.The silicone oil being adsorbed with solvent, after flowing back to silicone oil groove 3, due to immiscible between silicone oil and solvent or intermiscibility is poor, realizes AUTOMATIC ZONING.Usually, because silicone oil density is higher, lower floor is in; Solvent density is slightly low, is in lower floor.Like this, the silicone oil solvent extracted from silicone oil groove 3 lower floor is very low, has better adsorption effect for the solvent adsorbed in waste gas.The solvent on silicone oil upper strata is along with the automatic operation of equipment, and volume ratio regular meeting is increasing, after arriving overflow liquid level, automatically overflows from spout hole.
On the other hand, in absorption and resolving, silicone oil is not heated, and under work is in the condition of low temperature always, this advantageously in the absorption to solvent gas, also saves energy resource consumption simultaneously, avoids the evaporation of silicone oil.
For obtaining better solvent recovery quality, according to composition and the performance of recycling design, further rectifying or fractionation process can be carried out to overflowing back the solvent taken down.Because the solvent strength separated is very high, rectifying or fractionation process are relatively easy, not in the scope of this programme investigation.
Method for recovering solvents described in this programme and device; be applicable to the recycling of solvent gas in Coating Production Line drying course; but the recovery be not limited to solvent gas in Coating Production Line drying course, any instruction based on this programme or conversion, all at the protection domain of this programme.
Reference Figure of description 1, the wind extracted out, through countercurrent heat exchange effect, is lowered the temperature by the cold wind of the hot blast containing solvent of releasing from drying baker and feeding baking oven, the wind preheating simultaneously will sent into;
The hot blast containing solvent through countercurrent heat exchange process cools to facilitate solvent to separate out through surface cooler further;
With the wind containing solvent of process of lowering the temperature through spray section 2, under the effect of silicone oil, containing organic solvent in absorption waste gas wind, processed after filtration to return by the wind after adsorption treatment and reuse, exchange heat is carried out with the wind of releasing in the countercurrent heat exchange stage in return course, reach air intake heating, the object of exhausting cooling;
The silicone oil being adsorbed with solvent is got back in sedimentation resolver, due to difference and the mutual insolubility of density, under gravity, solvent and oil realize layering, usual solvents up, oil in below (when silicone oil proportion is light compared with solvent, up, solvent is in below for silicone oil);
Enter spray section 2 from the silicon layer extraction silicone oil after layering and drip washing is carried out to the waste gas containing solvent;
Further layered shaping can be carried out in case wherein by multi_layer extraction solvent out, isolate a small amount of silicone oil be mixed with in solvent.For obtaining purer recycling design, rectifying fractionation process can be carried out to the solvent separated further according to solvent composition and character.
Claims (4)
1. a retracting device for organic solvent, is characterized in that: comprise nested airduct, silicone oil groove (3), oil pump (5) and cooling heat exchanger (1); Described nested airduct comprises air-out airduct and air intake airduct, and air-out duct sleeve is located among air intake airduct or air intake duct sleeve is located among air-out airduct, forms described nested airduct; One end of nested airduct is used for being communicated with drying baker, and the other end of nested airduct is communicated with described silicone oil groove (3); Spray section (2) is provided with in described air intake airduct, silicone oil in described silicone oil groove (3) is pumped into described spray section (2) by oil pipe by oil pump (5), be used at described spray section (2) and nested airduct being provided with described cooling heat exchanger (1) between that one end of being communicated with drying baker, heat exchanger (1) of lowering the temperature is arranged in described air intake airduct.
2. the retracting device of a kind of organic solvent according to claim 1, is characterized in that: have solvent overflow mouth (4) in the top of described silicone oil groove (3).
3. the retracting device of a kind of organic solvent according to claim 1 and 2, it is characterized in that: the tube wall of described air-out airduct and air intake airduct adopts aluminium, galvanized iron sheet or stainless steel, pipe thickness is less than 5mm, in nested airduct, formed air entering and returning heat exchange segment (6) by the part of air intake and air-out parcel.
4. the retracting device of a kind of organic solvent according to claim 1, is characterized in that: at air intake, the outlet air end of nested airduct, and silicone oil groove (3) or cooling heat exchanger (1) position place are provided with thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520552129.3U CN204816134U (en) | 2015-07-28 | 2015-07-28 | Organic solvent's recovery unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520552129.3U CN204816134U (en) | 2015-07-28 | 2015-07-28 | Organic solvent's recovery unit |
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| CN204816134U true CN204816134U (en) | 2015-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354121A (en) * | 2018-10-29 | 2019-02-19 | 江苏欧迈机械工程有限公司 | A kind of coating cloud absorption water circle device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109354121A (en) * | 2018-10-29 | 2019-02-19 | 江苏欧迈机械工程有限公司 | A kind of coating cloud absorption water circle device |
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