CN101700451A - Method and device for recovering mixed waste gas in synthetic leather production - Google Patents
Method and device for recovering mixed waste gas in synthetic leather production Download PDFInfo
- Publication number
- CN101700451A CN101700451A CN200910233901A CN200910233901A CN101700451A CN 101700451 A CN101700451 A CN 101700451A CN 200910233901 A CN200910233901 A CN 200910233901A CN 200910233901 A CN200910233901 A CN 200910233901A CN 101700451 A CN101700451 A CN 101700451A
- Authority
- CN
- China
- Prior art keywords
- water
- waste gas
- dimethyl formamide
- spray
- absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a method for recovering mixed waste gas in synthetic leather production, which comprises the following steps of: filtering granular matters or fibrous matters from the mixed waste gas, and cooling the mixed waste gas; absorbing the cooled mixed waste gas by circulating spraying and packing contact by using dimethyl formamide as an absorbing solvent; refrigerating the dimethyl formamide absorbing liquid which absorbs the mixed waste gas; absorbing the waste gas which is absorbed by a packing layer in a contact way by circulating water spraying and contact with water again in the packing absorbing layer; and discharging the tail gas which is absorbed by water packing and reaches the standard. The invention also discloses a recovering device for realizing the method for recovering mixed waste gas, which comprises a tower body, wherein a dimethyl formamide spraying chamber, a dimethyl formamide packing chamber, a water spraying chamber and a water packing chamber are arranged in the tower body. The invention has sufficient gas-liquid contact and high waste gas recovering rate, and not only achieves the purpose of recycling toluene, butanone and DMF but also avoids the environment pollution.
Description
Technical field
The present invention relates to the synthetic leather production technical field, relate in particular to the recovery and treatment method of mix waste gas such as the dimethyl formamide that produces in the synthetic leather production process, butanone, toluene.The invention still further relates to the recycling equipment of using this processing method.
Background technology
Synthetic leather is various owing to designs and varieties, style is changeable, dimensionally stable, hardness evenly obtain utilization more and more widely, but need to use in a large number the volatile organic solvent in the synthetic leather production process.In the synthetic leather production technology, at first need on base cloth, coat with 70% dimethyl formamide and butanone+toluene of 30% and make the dilution that diluent dilutes polyurethane, handle through 60 ℃-170 ℃ hyperthermia drying again.The mix waste gas that contains dimethyl formamide (DMF), butanone and toluene in this production process evaporate in the atmosphere in large quantities and goes, and mix waste gas such as dimethyl formamide belong to the lower toxicity solvent, long-term contact and suction can cause people's hematopoietic function and liver obstacle, these mix waste gas also can cause increasing of biochemistry oxygen demand and nitrogen content simultaneously, and water quality is worsened rapidly; On the other hand, dimethyl formamide etc. are again important chemical material, and the market price is comparatively expensive.Therefore, directly discharge these organic exhaust gas and not only cause serious air environmental pollution and water environment pollution, harm humans healthy, and cause huge property waste, the production cost of synthetic leather is greatly improved.
Existing mix waste gas recovery and treatment method only can recovery section dimethyl formamide (DMF), this method is that mix waste gas is sent in the retracting device, with water is absorbent, after spray, the absorption of filler water and filler are received mist, discharges the recycle-water solution that contains DMF.Owing to have only the dimethyl formamide energy water-soluble in these mists, and toluene insoluble is in water, butanone is slightly soluble in water, and therefore this recovery method only can recycle dimethyl four acid amides (DMF), and wherein toluene, butanone still enter atmosphere as waste gas.
Chinese patent application " recovery method of toluene, butanone and dimethyl formamide in the wet-method synthetic leather process gas ", number of patent application: 200410053246.1 disclose a kind of mixed waste gas secondary separation and recovery method, and dimethyl formamide is separated with toluene, butanone with the method that vacuum evaporation is reclaimed, this method exists the technological process complexity in actual use, operation easier is big, parameter control difficulty, thereby be difficult in practice in the mix waste gas recycling engineering.Nonetheless, this process also exists organic efficiency low, and toluene, butanone exceed standard greatly in the gas of processing back, are difficult to reach environmental requirement, also cause the wasting of resources.Toluene, butanone and dimethyl formamide (DMF) recycled respectively it be there is no much practical significances on the synthetic leather manufacturing industry.Chinese patent application " method for processing resource of mix waste gas ", number of patent application: 200610023479.6 disclosed mix waste gas processing methods, though this processing method has improved the rate of recovery of waste gas to a certain extent, but it is still unstable to remove the rate of recovery, and owing to be exothermic process as the absorption process of solvent with dimethyl formamide (DMF), continuity along with absorption process, solvent temperature constantly rises, not only cause the quick reduction of absorption efficiency, but also have potential safety hazard, be difficult to produce the utilization that obtains reality in the mix waste gas recovery at synthetic leather.
Summary of the invention
At the above-mentioned deficiency of existing in prior technology, technical problem to be solved by this invention, provide a kind of waste gas rate of recovery height, can direct utilization synthetic leather produce in the mix waste gas recovery method.Another technical problem that will solve of the present invention is that a kind of retracting device of realizing this method also will be provided.
In order to solve the problems of the technologies described above, mix waste gas recovery method during synthetic leather of the present invention is produced is characterized in that this mix waste gas recovery method may further comprise the steps:
(1) earlier behind the mix waste gas elimination particulate matter or fibrous substance that produce in the synthetic leather production, cools off through heat-exchanger rig again, make the temperature of mix waste gas be cooled to 35 ℃～40 ℃;
(2) with the dimethyl formamide be lyosoption, the spray that cooled mix waste gas is circulated absorbs, and the liquid distribution density of its spray solvent is 4～6m3/m2h;
(3) the dimethyl formamide absorption liquid behind the absorption mix waste gas is freezed, make the absorption liquid temperature be cooled to 20 ℃～25 ℃;
(4) when the weight ratio concentration of toluene in the absorption liquid and butanone reached 30%, absorption liquid effluxed reuse after secondary filter;
(5) waste gas after absorbing through the solvent dimethylformamide spray is carried out demist and handle, to remove the droplet in the waste gas;
(6) waste gas after demist is handled contacts absorption with the solvent dimethyl formamide once more by packing layer again, and the dimethyl formamide liquid distribution density that its filler absorbs is 2.5～4.5m
3/ m
2H;
(7) waste gas after absorbing through above-mentioned packing layer contact being carried out the recirculated water spray absorbs; Water distribution density 6.5～9.5m that its water spray absorbs
3/ m
2H;
(8) waste gas after the contact of water spray enters the water packing absorbed layer again, contacts absorption in this filler absorbed layer once more with water, and the water distribution density that its filler absorbs is 4～6m
3/ m
2H;
(9) when dimethyl formamide weight ratio content reaches 20% in the shower water, shower water is effluxed reuse;
(10) tail gas after the contact of water packing absorbed layer water absorbs, after the demist processing, the gas qualified discharge.
Adopt above-mentioned mix waste gas recovery method, at first because two kinds of lyosoptions of this gas recovery method utilization carry out the absorption processing of waste gas, with the absorber portion of dimethyl formamide (DMF) as solvent, this absorber portion is under the situation of not introducing other solvent, utilize dimethyl formamide and toluene, mutual dissolubility between the butanone, reclaim simultaneously the toluene in the synthetic leather production mix waste gas efficiently, butanone and dimethyl formamide effluent gases, waste gas absorptivity height, the absorptivity of toluene and butanone is greater than 90%, the absorptivity of dimethyl formamide is not less than 99%, and can control simultaneously the discharging of pollutant well, not only realized the Organic Chemicals resource recycling to greatest extent, reduced the production cost of synthetic leather effectively, and reduced of the pollution effect of synthetic leather process gas to the Man ﹠ Nature environment, help the balanced growth of economic benefit and environmental benefit.Again because the waste gas after will absorbing through the contact of dimethyl formamide (DMF) absorber portion, deliver to again with water and handle as the absorber portion of lyosoption, toluene, butanone content in the mix waste gas of this absorber portion behind the dimethyl formamide absorber portion are to the utmost low, and dimethyl formamide has good intersolubility with glassware for drinking water, water by this section absorbs, further absorb the dimethyl formamide in the waste gas, make exhaust emissions be better than discharge standard fully, realized the discharging cleaned pollution-free target.More because in this recovery method, adopted the preliminary treatment of mix waste gas and the refrigeration of dimethyl formamide absorption liquid to handle, the mix waste gas temperature is controlled between 35 ℃～40 ℃, dimethyl formamide absorption liquid temperature is controlled between 20 ℃～25 ℃, because it is exothermic reaction that the waste gas of this absorber portion absorbs, and temperature is the key parameter that influences absorptivity, temperature is too high, dimethyl formamide volatilizees easily, be difficult for absorbing, and the probability of Yin Wendu raising increase blast, potential safety hazard produced, so the rising of absorption liquid temperature not only directly influences the security that organic efficiency and organic solvent use, and cause the generation of new dimethyl formamide gas; Therefore, handle the absorptivity that has improved solvent greatly, effectively reduce toxic emission, also eliminate safe hidden trouble to the precooling treatment of waste gas with to the refrigeration of absorption liquid.This recovery method had both combined the advantage separately of dimethyl formamide organic solvent and aqueous solvent, combine spray absorption and filler again and absorb technical advantage separately, recycling efficient height, the gas-liquid full contact, recyclable waste gas kind is many, the EGT wide ranges has extremely strong practice and is worth.
A kind of method for optimizing of mix waste gas recovery method of the present invention is with particulate matter or the fibrous substance in industrial filter cloth or the nonwoven elimination mix waste gas; Described heat-exchanger rig is to be the surface-type heat exchanger of medium with water.This method with filtering material elimination commonly used granule foreign and fiber impurity in the waste gas, be that the surface-type heat exchanger operating cost of medium is low with water, the equipment working service is convenient.
Mix waste gas recovery method of the present invention carries out at least two section sprays with dimethyl formamide as lyosoption to cooled mix waste gas and absorbs with a kind of method for optimizing, and wherein at least one section spray is absorbed as reverse spray.This method has increased and has contacted the absorption machine meeting between waste gas and lyosoption, improved absorption efficiency, and method is easy.
In order to realize mix waste gas recovery method of the present invention, the retracting device of mix waste gas recovery method of the present invention, comprise the absorption tower body of the tower, in the body of the tower of described absorption tower, be disposed with dimethyl formamide spray chamber, dimethyl formamide filler absorption chamber from bottom to top, water spray absorption chamber and water packing absorption chamber; In described dimethyl formamide spray chamber, be disposed with refrigerating plant, lower floor's spray thrower, upper strata spray thrower and bottom demister from bottom to top; The pairing absorption tower of described dimethyl formamide spray chamber body of the tower is provided with the mix waste gas inlet; In described dimethyl formamide filler absorption chamber, be disposed with dimethyl formamide gatherer, dimethyl formamide dry load and dimethyl formamide distributor from bottom to top; In described water spray absorption chamber, be disposed with spray chamber water collector, water spray thrower from bottom to top; Be provided with between dimethyl formamide filler absorption chamber and the water spray absorption chamber and separate the demist layer; In described water packing absorption chamber, be disposed with packing layer water collector, water dry load and water distributor from bottom to top; Be provided with the top demister above this water distributor, the top of described absorption tower body of the tower is provided with the top evacuation port.
After adopting said structure, owing in absorbing body of the tower, be provided with the dimethyl formamide absorber portion that includes dimethyl formamide spray chamber and filler suction-chamber, and the water absorber portion of water spray absorption chamber and water packing absorption chamber, utilize the intersolubility between dimethyl formamide (DMF) and toluene, butanone on the one hand, with dimethyl formamide (DMF) as solvent, solve water to the problem that toluene, butanone are difficult to dissolve, realized organic high efficiente callback utilization in the mix waste gas; Having utilized the intersolubility of water and dimethyl formamide on the other hand, is absorbent with water, and dimethyl formamide (DMF) waste gas is further dissolved absorption once more, and the rate of recovery height of waste gas discharges pollution-free; Thereby combine the advantage separately that solvent dimethylformamide and water absorb, it is strong to absorb disposal ability.Again owing to all adopted spray absorption and filler to absorb at dimethyl formamide absorber portion and water absorber portion, absorbent can evenly be disperseed and the abundant contact lysis of dispersed ground and waste gas, the gas-liquid full contact, and the large tracts of land that more helps gas-liquid contacts, reach the big and little ideal effect of resistance of flux, thereby combine the advantage that filler absorbs and spray absorbs, strengthened gas-liquid contact assimilation effect greatly.Also owing in the dimethyl formamide spray chamber, be provided with refrigerating plant, it is exothermic reaction that the waste gas of dimethyl formamide (DMF) solvent absorbs, and the lyosoption temperature is too high, dimethyl formamide is easy to volatilization, be difficult for absorbing, directly affect absorption efficiency, and setting up of temperature also increasing the probability of blasting, produce potential safety hazard, refrigerating plant is set and the temperature of dimethyl formamide lyosoption is controlled in the desirable scope all the time, has the reclamation rate of absorption height, the advantage of safety non-pollution.Adopt separation demist layer to avoid the dimethyl formamide droplet to enter the water absorber portion, reduce the loss of dimethyl formamide; And the top demister has guaranteed final efficient separation of gas-liquid, reduces the loss of water in the recovery tower, more helps the clean emission of vent gas.
A kind of preferred implementation of the present invention, described refrigerating plant comprises cryovial, and this cryovial is immersed in the dimethyl formamide absorption liquid, and its refrigerant is ethylene glycol or ammonia.Adopt immersion surface heat exchanging mode, heat transference efficiency height, good refrigeration effect; Ethylene glycol or ammonia can adapt to the refrigeration requirement of lyosoption well as refrigerant, and non-secondary pollution, and is safe in utilization.
Another preferred implementation of the present invention, described mix waste gas inlet is connected with exhaust gas blower, also is communicated with filter and heat exchanger respectively at the aspiration port of exhaust gas blower.Described heat exchanger is to be the shell-and-tube surface exchanger or the bushing type surface exchanger of medium with water.Aspiration port in exhaust gas blower is communicated with filter and heat exchanger, both particle and fibrous materials in the elimination mix waste gas effectively, can reduce the temperature of mix waste gas again greatly, this preliminary treatment to the input mix waste gas, ten minutes helps the efficient absorption of solvent.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the process chart of mix waste gas recovery method during synthetic leather of the present invention is produced;
Fig. 2 is a structural representation of realizing the retracting device of mix waste gas recovery method of the present invention.
The specific embodiment
In recovery method process chart shown in Figure 1, at first the mix waste gas that produces is installed solids such as particulate matter in the elimination waste gas or fibrous substance after filtration in the synthetic leather production process, carry out the heat exchange cooling through heat-exchanger rig again, generally the mix waste gas temperature of collecting from produce makes the mix waste gas temperature reduce to 35 ℃-40 ℃ after heat exchange about 80 ℃; Cooled mix waste gas is sent into multilayer dimethyl formamide (DMF) solvent absorption process section, the filtrate of its filter or material for core adopt common used in industry filter cloth or nonwoven again, and the heat-exchanger rig employing is the surface-type heat exchanger of medium with water.
The spray that carries out at least two sections in this absorption technique section earlier absorbs, its lyosoption is dimethyl formamide (DMF), as the spray that carries out two sections DMF absorbs, one section is for spraying in the same way, the reverse spray of another section, certainly can also be three sections, four sections or the more spray absorption of multistage, be reverse spray but wherein arrive few one section.The spray liquid distribution density of its DMF spray solvent is 4-6m
3/ m
2H is (in the cross-sectional area on absorption tower: the solvent volume of passing through on the unit cross-sectional area in the unit interval).Owing in dimethyl formamide (DMF) absorption process, will produce exothermic reaction, for reducing the temperature of lyosoption, improve assimilation effect, the dimethyl formamide absorption liquid is freezed, its absorption liquid temperature is controlled between 20 ℃-25 ℃.
Waste gas after dimethyl formamide (DMF) solvent spray absorbs carries out demist by demister to be handled, to remove the droplet in the waste gas; Waste gas after demist is handled enters into DMF solvent filler absorbed layer again, contacts absorption with the solvent dimethyl formamide once more by packing layer, the liquid distribution density 2.5-4.5m of the dimethyl formamide of its filler absorbed layer in the absorption tower
3/ m
2H.
Through behind the above-mentioned processing step, the toluene in the mix waste gas, butanone are absorbed by the DMF solvent, only have a spot of DMF waste gas to enter into water absorption technique section.In this absorption technique section, waste gas at first enters into water spray absorbed layer and sprays with water and contact, and the water distribution density of its water spray absorption is 6.5-9.5m
3/ m
2H.Waste gas after water spray contact enters into the filler absorbed layer of water absorber portion again, and waste gas contacts absorption once more with water in this packing layer, and the water distribution density of its packing layer is 4-6m
3/ m
2H.After the tail gas of water absorption technique section, remove qualified discharge behind the atomizing moisture content by the demist layer.
At the DMF solvent of DMF solvent absorption process section spray absorbed layer, its DMF solvent constantly is pumped down to spray thrower and contacts with spray that mix waste gas circulates in the effect of circulating pump.When the concentration (weight ratio) of toluene in the absorption liquid and butanone when reaching 30%, absorption liquid effluxes reuse or recycling after secondary filter, this secondary filter is that absorption liquid is finished secondary filter by accurate filter, with the impurity in the further elimination absorption liquid.At the DMF of this process section solvent filler absorbed layer, the DMF solvent is then under the effect of another circulating pump, being circulated in DMF groove, liquid distribution trough, dry load, gatherer returns in the DMF groove, to wherein replenishing the DMF solvent, the DMF in the groove also replenishes to the spray absorbed layer of this process section when the liquid level in the DMF groove descends.
At the water of water absorption technique section spray absorbed layer, water constantly is sucked into the water spray thrower and contacts with the waste gas spray under the effect of water circulating pump.DMF content in the aqueous solution reaches 20% (weight ratio) and effluxes, and in PU leather production batching, reaches the effect of recycling with direct reuse.Water packing absorbed layer at this process section, water is under the effect of another water circulating pump, water is circulated in water tank, liquid separator, dry load, gatherer and returns in the water tank, to wherein replenishing soft water, the water in the water tank also replenishes to the water spray absorbed layer of this process section when the water level in the water tank descends.
In mix waste gas retracting device of the present invention shown in Figure 2, the whole recovery device is divided into DMF absorber portion and water absorber portion from bottom to top successively, and the DMF absorber portion comprises spray absorbed layer and filler absorbed layer again; The water absorber portion also comprises water spray absorbed layer and water packing absorbed layer.So in absorption tower body of the tower 8, be disposed with dimethyl formamide spray chamber 2, dimethyl formamide filler absorption chamber 9, water spray absorption chamber 13 and water packing absorption chamber 4 from bottom to top.
In dimethyl formamide spray chamber 2 from down to only being disposed with refrigerating plant 1, lower floor's spray thrower 24, upper strata spray thrower 7 and bottom demister 23 again; Be set with mix waste gas inlet 3 absorbing body of the tower 8 and this spray chamber 2 corresponding positions, lower floor's spray thrower 24 encloses around the mix waste gas outlet, the reverse spray of lower floor's spray thrower 24 employings; Be provided with upper strata spray thrower 7 above lower floor's spray thrower 24, upper strata spray thrower 7 adopts the mode that sprays in the same way.Mix waste gas leads to mix waste gas inlet 3 through filter 6, heat exchanger 5 and exhaust gas blower 4 successively, and is input in the dimethyl formamide spray chamber 2.In dimethyl formamide spray chamber 2 bottoms is dimethyl formamide (DMF) storage tank, is provided with refrigerating plant 1 in this storage tank, and the refrigerating coil of this refrigerating plant immerses in the DMF absorption liquid, and the refrigerant of its refrigerating plant 1 adopts ethylene glycol or chlorine refrigeration.Heat exchanger 5 is for being the shell-and-tube surface exchanger of medium with water or adopting the bushing type surface exchanger.The toluene of the absorption liquid in the DMF container slot and the concentration of butanone (weight ratio) are when reaching 30%, and absorption liquid effluxes reuse or recycling through accurate filter 28; This accurate filter 28 adopts the high technology ceramics filter, also can adopt secondary filter devices commonly used such as accurate stainless steel filter.Circulating pump I 25 constantly is evacuated to upper strata spray thrower 7 and lower floor's spray thrower 24 with the absorption liquid in the DMF storage tank of body of the tower bottom, so that constantly spray contact to this spray chamber.Above-mentioned two spray throwers all adopt nozzle formula spray equipment.
In dimethyl formamide filler absorption chamber 9, be disposed with dimethylformamide filler gatherer 22, dimethyl formamide dry load 21 and dimethyl formamide distributor 10 from bottom to top.The DMF absorption liquid is circulated in 26 of dimethyl formamide groove 26, circulating pump II 27, dimethyl formamide distributor 10, dimethyl formamide dry load 21, dimethyl formamide gatherer 22 and dimethyl formamide grooves under the effect of circulating pump II 27.Dimethyl formamide distributor 10 is a tank type liquid distributor.Dimethyl formamide dry load 21 is a perforated plate corrugated filler.When the liquid level in the dimethyl formamide groove 26 is not enough, mend, and this absorption liquid is also mended in the dimethyl formamide spray absorption chamber 2 of lower floor into the dimethyl formamide absorption liquid.
Be disposed with spray chamber water collector 12, water spray thrower 20 from bottom to top in water spray absorption chamber 13, this water spray thrower 20 also is a nozzle formula spray equipment.Shower water is circulated between external water tank I 29, water circulating pump I 30, water spray thrower 20, spray chamber water collector 12 and the external water tank I 29, so that water absorbs waste gas as absorbent under the effect of water circulating pump I 30.When the water among the external water tank I 29 contains that DMF surpasses or when reaching 20% (weight ratio), the DMF aqueous solution effluxes and reuse or smart gold-plating refine.Be provided with between dimethyl formamide filler absorption chamber 9 and water spray absorption chamber 13 and separate demist layer 11, enter into water spray absorption chamber 13 to stop the DMF droplet, this is separated demist layer 11 and adopts the silk screen Defrosting structure.
In water packing absorption chamber 14, be disposed with packing layer water absorber 19, water dry load 18 and water distributor 17 from the top down.Under the effect of water circulating pump II32, the water absorption liquid is circulated between external water tank II 31, water circulating pump II 32, water distributor 17, water dry load 18, packing layer water collector 19 and the external water tank II 31 at the water absorption liquid of this filler absorbed layer.When the water level among the external water tank II 31 is not enough, mend into demineralized water.This external water tank II 31 also mends the entry absorption liquid to external water tank I 29.Water dry load 18 is a perforated plate corrugated filler.Be provided with top demister 15 in the body of the tower above water distributor 17, be provided with top emptying 16 at the top of absorption tower body of the tower 8, this top demister 15 also is the silk screen Defrosting structure.
Above-mentionedly enumerated a kind of preferred implementation of the present invention, but the present invention is not limited thereto, also has many improvement and conversion.Can also adopt the spray absorbed layer and the filler absorbed layer of multilayer respectively according to concrete technological requirement and disposal ability at DMF absorber portion and water absorber portion, as layer 2-3 etc.Spray thrower, gatherer, demister, dry load and liquid distribution trough all can adopt other structural shape commonly used.
Claims (9)
1. mix waste gas recovery method during a synthetic leather is produced is characterized in that this mix waste gas recovery method may further comprise the steps:
(1) earlier behind the mix waste gas elimination particulate matter or fibrous substance that produce in the synthetic leather production, cools off through heat-exchanger rig again, make the temperature of mix waste gas be cooled to 35 ℃～40 ℃;
(2) with the dimethyl formamide be lyosoption, the spray that cooled mix waste gas is circulated absorbs, and the liquid distribution density of its spray solvent is 4～6m
3/ m
2H;
(3) the dimethyl formamide absorption liquid behind the absorption mix waste gas is freezed, make the absorption liquid temperature be cooled to 20 ℃～25 ℃;
(4) when the weight ratio concentration of toluene in the absorption liquid and butanone reached 30%, absorption liquid effluxed reuse after secondary filter;
(5) waste gas after absorbing through the solvent dimethylformamide spray is carried out demist and handle, to remove the droplet in the waste gas;
(6) waste gas after demist is handled contacts absorption with the solvent dimethyl formamide once more by packing layer again, and the dimethyl formamide liquid distribution density that its filler absorbs is 2.5～4.5m
3/ m
2H;
(7) waste gas after absorbing through above-mentioned packing layer contact being carried out the recirculated water spray absorbs; Water distribution density 6.5～9.5m that its water spray absorbs
3/ m
2H;
(8) waste gas after the contact of water spray enters the water packing absorbed layer again, contacts absorption in this filler absorbed layer once more with water, and the water distribution density that its filler absorbs is 4～6m
3/ m
2H;
(9) when dimethyl formamide weight ratio content reaches 20% in the shower water, shower water is effluxed reuse;
(10) tail gas after the contact of water packing absorbed layer water absorbs, after the demist processing, the gas qualified discharge.
2. mix waste gas recovery method according to claim 1 is characterized in that: with particulate matter or the fibrous substance in industrial filter cloth or the nonwoven elimination mix waste gas; Described heat-exchanger rig is to be the surface-type heat exchanger of medium with water.
3. mix waste gas recovery method according to claim 1 is characterized in that: cooled mix waste gas is carried out at least two sections sprays with dimethyl formamide as lyosoption absorb, wherein at least one section spray is absorbed as reverse spray.
4. mix waste gas recovery method according to claim 1 is characterized in that: described secondary filter is that absorption liquid filters through accurate filter.
5. retracting device of realizing above-mentioned mix waste gas recovery method, comprise absorption tower body of the tower (8), it is characterized in that: in described absorption tower body of the tower (8), be disposed with dimethyl formamide spray chamber (2), dimethyl formamide filler absorption chamber (9) from bottom to top, water spray absorption chamber (13) and water packing absorption chamber (14); In described dimethyl formamide spray chamber (2), be disposed with refrigerating plant (1), lower floor's spray thrower (24), upper strata spray thrower (7) and bottom demister (23) from bottom to top; Described dimethyl formamide spray chamber (2) pairing absorption tower body of the tower (8) is provided with mix waste gas inlet (3); In described dimethyl formamide filler absorption chamber (9), be disposed with dimethyl formamide gatherer (22), dimethyl formamide dry load (21) and dimethyl formamide distributor (10) from bottom to top; In described water spray absorption chamber (13), be disposed with spray chamber water collector (12), water spray thrower (20) from bottom to top; Be provided with between dimethyl formamide filler absorption chamber (9) and the water spray absorption chamber (13) and separate demist layer (11); In described water packing absorption chamber (14), be disposed with packing layer water collector (19), water dry load (18) and water distributor (17) from bottom to top; Be provided with top demister (15) in this water distributor (17) top, the top of described absorption tower body of the tower (8) is provided with top evacuation port (16).
6. retracting device according to claim 5 is characterized in that: described refrigerating plant (1) comprises cryovial, and this cryovial is immersed in the dimethyl formamide absorption liquid, and its refrigerant is ethylene glycol or ammonia.
7. retracting device according to claim 5, it is characterized in that: described mix waste gas inlet (3) is connected with exhaust gas blower (4), aspiration port in exhaust gas blower (4) also is communicated with filter (6) and heat exchanger (5) respectively, and this heat exchanger (5) is to be the shell-and-tube surface exchanger or the bushing type surface exchanger of medium with water.
8. retracting device according to claim 5, it is characterized in that: described bottom demister (23), separation demister (11) and/or top demister (15) adopt the silk screen Defrosting structure, and described dimethyl formamide distributor (10) and/or water distributor (17) are tank type liquid distributor.
9. retracting device according to claim 5, it is characterized in that: described dimethyl formamide dry load (21) and/or water dry load (18) are perforated plate corrugated filler, and described lower floor spray thrower (24), upper strata spray thrower (7) and/or water spray thrower (20) are nozzle formula spray equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910233901A CN101700451A (en) | 2009-10-21 | 2009-10-21 | Method and device for recovering mixed waste gas in synthetic leather production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910233901A CN101700451A (en) | 2009-10-21 | 2009-10-21 | Method and device for recovering mixed waste gas in synthetic leather production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101700451A true CN101700451A (en) | 2010-05-05 |
Family
ID=42155392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910233901A Pending CN101700451A (en) | 2009-10-21 | 2009-10-21 | Method and device for recovering mixed waste gas in synthetic leather production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101700451A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500192A (en) * | 2011-11-11 | 2012-06-20 | 河北科技大学 | Absorbent for recovering organic solvent in tail gas in artificial leather works and using method of same |
| CN103977672A (en) * | 2014-06-10 | 2014-08-13 | 大连海事大学 | Processing method and processing device for organic waste gas |
| CN105032179A (en) * | 2015-07-06 | 2015-11-11 | 浙江浙大环境工程有限公司 | Apparatus and process for treating synthetic leather exhaust gas |
| CN105664710A (en) * | 2016-02-02 | 2016-06-15 | 周益辉 | Method for treating paint-spraying volatile organic waste gas in coating workshop |
| CN106215661A (en) * | 2016-08-28 | 2016-12-14 | 桂林市晶准测控技术有限公司 | The method for purifying and recovering of commercial production organic exhaust gas |
| CN106334378A (en) * | 2016-08-28 | 2017-01-18 | 桂林市晶准测控技术有限公司 | Recycling method for mixed exhaust gas in synthetic leather industrial production |
| CN107551745A (en) * | 2017-10-17 | 2018-01-09 | 宋荟 | Dust vapor Recovery Purifying tower |
| CN107569977A (en) * | 2017-09-27 | 2018-01-12 | 株洲火炬工业炉有限责任公司 | A kind of steel drum application fume afterheat and solvent recovery unit |
| CN110898665A (en) * | 2019-12-06 | 2020-03-24 | 徐州申恒环境科技有限公司 | High-efficiency treatment and purification system for oligomerization mixed gas and working mode of high-efficiency treatment and purification system |
| CN112691495A (en) * | 2021-01-29 | 2021-04-23 | 浙江金潮实业有限公司 | Method for treating waste gas generated in synthetic leather production process |
| CN113491928A (en) * | 2021-07-27 | 2021-10-12 | 中材锂膜有限公司 | Oily coating waste gas treatment process and device |
| CN113694711A (en) * | 2021-10-28 | 2021-11-26 | 瑞润化工(南通)有限公司 | Method for recycling waste gas in production of soft-touch leather coating |
-
2009
- 2009-10-21 CN CN200910233901A patent/CN101700451A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500192A (en) * | 2011-11-11 | 2012-06-20 | 河北科技大学 | Absorbent for recovering organic solvent in tail gas in artificial leather works and using method of same |
| CN102500192B (en) * | 2011-11-11 | 2014-08-06 | 河北科技大学 | Absorbent for recovering organic solvent in tail gas in artificial leather works and using method of same |
| CN103977672A (en) * | 2014-06-10 | 2014-08-13 | 大连海事大学 | Processing method and processing device for organic waste gas |
| CN105032179A (en) * | 2015-07-06 | 2015-11-11 | 浙江浙大环境工程有限公司 | Apparatus and process for treating synthetic leather exhaust gas |
| CN105664710A (en) * | 2016-02-02 | 2016-06-15 | 周益辉 | Method for treating paint-spraying volatile organic waste gas in coating workshop |
| CN106334378A (en) * | 2016-08-28 | 2017-01-18 | 桂林市晶准测控技术有限公司 | Recycling method for mixed exhaust gas in synthetic leather industrial production |
| CN106215661A (en) * | 2016-08-28 | 2016-12-14 | 桂林市晶准测控技术有限公司 | The method for purifying and recovering of commercial production organic exhaust gas |
| CN107569977A (en) * | 2017-09-27 | 2018-01-12 | 株洲火炬工业炉有限责任公司 | A kind of steel drum application fume afterheat and solvent recovery unit |
| CN107551745A (en) * | 2017-10-17 | 2018-01-09 | 宋荟 | Dust vapor Recovery Purifying tower |
| CN110898665A (en) * | 2019-12-06 | 2020-03-24 | 徐州申恒环境科技有限公司 | High-efficiency treatment and purification system for oligomerization mixed gas and working mode of high-efficiency treatment and purification system |
| CN112691495A (en) * | 2021-01-29 | 2021-04-23 | 浙江金潮实业有限公司 | Method for treating waste gas generated in synthetic leather production process |
| CN112691495B (en) * | 2021-01-29 | 2022-06-24 | 浙江金潮实业有限公司 | Method for treating waste gas generated in synthetic leather production process |
| CN113491928A (en) * | 2021-07-27 | 2021-10-12 | 中材锂膜有限公司 | Oily coating waste gas treatment process and device |
| CN113694711A (en) * | 2021-10-28 | 2021-11-26 | 瑞润化工(南通)有限公司 | Method for recycling waste gas in production of soft-touch leather coating |
| CN113694711B (en) * | 2021-10-28 | 2021-12-24 | 瑞润化工(南通)有限公司 | Method for recycling waste gas in production of soft-touch leather coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101700451A (en) | Method and device for recovering mixed waste gas in synthetic leather production | |
| CN201431850Y (en) | Ammonia recycling device | |
| CN101423214A (en) | Method for catching carbon dioxide in generating plant flue gas by ammonia process and equipment thereof | |
| CN108465437B (en) | Tower-type granulation tail gas dust removal device and dust removal method thereof | |
| CN103446853A (en) | Exhaust gas recovery device and exhaust gas recovery system for processing copper-clad plate | |
| CN202164342U (en) | Impact type atomized spray wet-process dust-collecting device for zinc oxide volatilized dust | |
| CN206529297U (en) | Carbon dioxide recovery system, in accordance | |
| CN87108052A (en) | Reclaim the technology of carbon dioxide from gas | |
| CN201543356U (en) | Mixed exhaust gas recovering processing equipment in production of synthetic leather | |
| CN1327936C (en) | Dimethyl formamide effluent gases recovering and processing method for dry method synthetic leather | |
| CN106334378A (en) | Recycling method for mixed exhaust gas in synthetic leather industrial production | |
| CN105149151B (en) | A kind of paint spray booth seizure coating cloud device and its technique | |
| CN204974313U (en) | Paint spray booth is with catching coating cloud device | |
| CN104261370A (en) | Phosphoric acid production device by employing hot method | |
| CN202224028U (en) | Organic waste gas recovering and processing device in synthetic leather production | |
| CN207478228U (en) | Urea granulation tower powder/dust reclaiming device | |
| CN106964245B (en) | High-efficient processing apparatus of nitrogen oxide waste gas during iron oxide pigment production | |
| CN109126181A (en) | A kind of methanol gas recovering device and recovery method | |
| CN112691495B (en) | Method for treating waste gas generated in synthetic leather production process | |
| CN211612118U (en) | Urea prilling tower top of tower dust recovery device | |
| CN107983057A (en) | A kind of ultra-clean urea granulation tower powder/dust reclaiming device | |
| CN107759493A (en) | A kind of method of free ammonia in removal carbamide dust | |
| CN209005253U (en) | A kind of production polyether polyol device for recovering tail gas | |
| CN207413096U (en) | A kind of gas recovery system for mechanical equipment water paint | |
| CN201752621U (en) | Spandex VG mixed gas recycling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100505 |