CN103752127A - Organic-waste-gas treating equipment in intaglio printing workshop and treating method of organic waste gas - Google Patents
Organic-waste-gas treating equipment in intaglio printing workshop and treating method of organic waste gas Download PDFInfo
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Abstract
The invention discloses organic-waste-gas treating equipment in an intaglio printing workshop and a treating method of organic waste gas. The organic-waste-gas treating equipment is used for carrying out filtering treatment on the organic waste gas exhausted by printing equipment through absorbing equipment to separate the organic waste gas into solvent-mixed gas and tail gas and exhaust the tail gas by an exhausting pipe; the negative-pressure heating treatment is carried out on the filtered solvent-mixed gas by a negative-pressure heating device, and the solvent-mixed gas is conveyed into an analytic condensing device to condense the solvent-mixed gas into liquid; then the liquid solvent-mixed gas is heated by an analytic heating device according to the boiling points of all mixtures in the liquid solvent-mixed gas so as to be separated into a plurality of gaseous recovered matters; the gaseous recovered matters are condensed into liquid and recovered by a condensing and recovering device. The organic-waste-gas treating equipment and the treating method of the of organic waste gas, disclosed by the invention, have the advantages that the waste gas of the printing equipment can exhaust the waste gas conforming to the exhaust standard and meeting the environmental-protecting requirement with low cost, and the separated solvent-mixed gas can be recovered according to ingredients, so that the cost of materials is greatly saved.
Description
Technical field
The present invention relates to the VOCs treatment technical field of machine room, particularly organic waste gas treatment equipment and the processing method thereof in a kind of intaglio printing workshop.
Background technology
When printing enterprise produces in intaglio printing, need in ink, add a large amount of solvents (as, isopropyl alcohol, ethyl acetate, ethanol, butyl acetate etc.), to adjust viscosity, thixotropy, mobility of ink etc., make ink be more suitable for print production.Meanwhile, gravure printing ink itself is exactly liquid ink, also has a large amount of solvents in ink.In production process, ink is from forme is transferred to paper surface, need to carry out drying and processing to paper makes ink solidification in printing, in the process of drying and processing, solvent all volatilizees, form organic exhaust gas, waste gas can be discharged by the exhaust duct of printing equipment, directly, in discharged air, by contaminated environment, the organic exhaust gas that therefore need to produce printing equipment is processed.
At present, generally adopt the method for adsorption tower filtration or burning to process organic exhaust gas, make emission gases meet discharge standard.Wherein, when adopting adsorption tower to process waste gas, need in adsorption tower, add activated carbon, utilize charcoal absorption organic exhaust gas, after charcoal absorption is saturated, with water vapour and or nitrogen carry out the solvent gas organic solvent molecule in desorption active carbon, this mode need to regularly replace the activated carbon in adsorption tower, its cost is high.Adopt steam separating process, can cause in recovered solvent water content too high, can not be directly used in production and application again.Adopt nitrogen separating process, also need to increase nitrogen making machine, cost is high and have certain potential safety hazard.Therefore this exhaust-gas treatment effect is undesirable; When adopting combustion system to process organic exhaust gas, need in waste gas, sneak into natural gas igniting, make mist burning generate carbon dioxide and directly discharge, but this mode need to be sneaked into natural gas, its cost is also higher, and directly discharges two vaporized carbons, cause greenhouse effects, be also unfavorable for environmental protection.
In addition, in above-mentioned organic exhaust gas, most of solvent for volatilization, if can effectively reclaim these solvents, can reuse, and Jiang Gei enterprise saves purchase cost.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide organic waste gas treatment equipment and the processing method thereof in a kind of intaglio printing workshop, can in situation, to the organic exhaust gas of printing equipment discharge, process cheaply, make it meet discharge standard, and can also reclaim the solvent in organic exhaust gas.
In order to achieve the above object, the present invention has taked following technical scheme:
The organic waste gas treatment equipment in intaglio printing workshop, is connected with the exhaust outlet of printing equipment, and it comprises:
For inputting the air inlet pipe of the organic exhaust gas of printing equipment discharge;
For described organic exhaust gas is carried out to filtration treatment, make organic exhaust gas be separated into the adsorption plant of solvent gas and tail gas, wherein said solvent gas absorption is on the molecular sieve of adsorption plant;
For discharging the blast pipe of described tail gas;
Described in being used for inciting somebody to action, be adsorbed on solvent gas on molecular sieve and, by negative pressure and heat treatment, make solvent desorbing gas, and solvent gas is sent into the negative pressure heating device of resolving condensing unit;
For making the congeal into parsing condensing unit of liquid of solvent gas cold;
For according to the solvent gas after the boiling point heating-condensing of each mixture of solvent gas, make mixture be separated into the parsing heater of some gaseous state regenerants;
For the condensate recycling device that described some gaseous state regenerants are condensed into liquid and reclaim;
One end of described air inlet pipe is communicated with the exhaust outlet of described printing equipment, the other end of air inlet pipe is communicated with the air inlet of adsorption plant, the gas outlet of adsorption plant is communicated with described blast pipe, the air inlet of described adsorption plant is also communicated with described negative pressure heating device, and described negative pressure heating device, parsing condensing unit, parsing heater are connected successively with condensate recycling device.
In the organic waste gas treatment equipment in described intaglio printing workshop, described adsorption plant comprises: at least two absorption modules, are provided with the detector that whether meets discharge standard for detection of tail gas on described absorption module; Described organic waste gas treatment equipment also comprises that at least two for controlling the first control valve of the air-flow break-make of air inlet pipe, at least two for control blast pipe air-flow break-make the second control valve and for according to the testing result of detector, control the control device of the open/close states of corresponding the first control valve and the second control valve; Described control device is connected with detector, the first control valve and the second control valve, and described the first control valve is installed in air inlet pipe, and the second control valve is installed on blast pipe.
In the organic waste gas treatment equipment in described intaglio printing workshop, described absorption module comprises one-level adsorption tower and the secondary absorption tower being communicated with one-level adsorption tower, in described one-level adsorption tower and secondary absorption tower, is provided with for filtering the molecular sieve of organic exhaust gas.
In the organic waste gas treatment equipment in described intaglio printing workshop, described parsing condensing unit comprises the first condenser coil for delivery of solvent gas, for first air-cooler of described the first condenser coil being lowered the temperature and processing; One end of described the first condenser coil is communicated with negative pressure heating device, and the other end of the first condenser coil is communicated with parsing heater; Described the first air cooler position is in a side of the first condenser coil.
In the organic waste gas treatment equipment in described intaglio printing workshop, described parsing heater comprises resolves heating tank and for to resolving the force (forcing) pump of heating tank pressurized treatments; Described parsing heating tank is communicated with parsing condensing unit and condensate recycling device, and described force (forcing) pump is installed on described parsing heating tank;
Described organic waste gas treatment equipment also comprises heater, and described heater comprises the second heating component, for detection of the temperature inductor of heating-up temperature with for controlling the temperature controller of heating-up temperature; Described the second heating component is installed on described parsing heating tank, and described temperature controller connects described the second heating component and temperature inductor.
In the organic waste gas treatment equipment in described intaglio printing workshop, described condensate recycling device comprises the second condenser coil for delivery of some gaseous state regenerants, the second air-cooler of processing for described the second condenser coil is lowered the temperature and for reclaiming the fluid reservoir of solution, one end of described the second condenser coil is communicated with described parsing heater, the other end of the second condenser coil is communicated with described fluid reservoir, and described the second air cooler position is in a side of described the second condenser coil.
In the organic waste gas treatment equipment in described intaglio printing workshop, described fluid reservoir comprises the water tank for recycle-water, and described water tank is communicated with the other end of the second condenser coil.
An organic waste gas treatment method, for the treatment of the organic exhaust gas in intaglio printing workshop, it comprises:
The waste gas that A, printing equipment are discharged is inputted in adsorption plant by air inlet pipe, carries out filtration treatment and makes waste gas be separated into solvent gas and tail gas, and discharge described tail gas by blast pipe by adsorption plant;
B, by negative pressure heating device, described solvent gas is carried out to negative pressure and heat treatment, and solvent gas is sent into resolve in condensing unit, make the solvent gas cold liquid that congeals into;
C, by resolving heater, according to the boiling point of each mixture in liquid solvent mist, heat liquid solvent gas, make liquid solvent mist be separated into some gaseous state regenerants;
D, by condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim.
In described organic waste gas treatment method, described steps A specifically comprises:
The organic exhaust gas that A1, printing equipment are discharged is inputted in an absorption module by air inlet pipe, carries out filtration treatment make organic exhaust gas be separated into solvent gas and tail gas by this absorption module;
A2, by blast pipe, discharge described tail gas, and by detector, detect tail gas and whether meet discharge standard;
If A3 detector detects tail gas while not meeting discharge standard, the first control valve of import department and second control valve in its exit of by control device, controlling this absorption module are closed; Make the first control valve of import department and the second control valve unlatching in its exit of another absorption module make another absorption module carry out absorption work simultaneously.
In described organic waste gas treatment method, described step C specifically comprises:
C1, force (forcing) pump will be resolved heating tank pressurization;
C2, by resolving heater according to the boiling point of each mixture in liquid solvent mist, by boiling point order from low to high, heat successively liquid solvent gas; By temperature inductor, detect in real time the temperature of liquid solvent mist, and feed back to temperature controller, by temperature controller, control the heating-up temperature of heating component simultaneously.
Compared to prior art, organic waste gas treatment equipment and the processing method thereof in intaglio printing provided by the invention workshop, by adsorption plant, the organic exhaust gas of printing equipment discharge is carried out to filtration treatment and make organic exhaust gas be separated into solvent gas and tail gas, and discharge described tail gas by blast pipe; And solvent gas after filtering carries out negative pressure and heat treatment by negative pressure heating device, and solvent gas is sent into resolve in condensing unit, make the solvent gas cold liquid that congeals into; By resolving heater, according to the boiling point of each mixture in liquid solvent mist, heat liquid solvent gas afterwards, make liquid solvent mist be separated into some gaseous state regenerants; By condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim again, the present invention only needs lower cost just can make the waste gas of printing equipment meet discharge standard to meet environmental requirement, and the solvent gas after separation can be pressed composition recovery, thereby can reuse, for producer saves a large amount of material costs.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the organic waste gas treatment equipment in intaglio printing provided by the invention workshop.
Fig. 2 is parsing condensing unit in the organic waste gas treatment equipment in intaglio printing provided by the invention workshop, the structural representation of resolving heater and condensate recycling device.
Fig. 3 is the flow chart of organic waste gas treatment method provided by the invention.
The specific embodiment
The invention provides organic waste gas treatment equipment and the processing method thereof in a kind of intaglio printing workshop, for making object of the present invention, technical scheme and effect clearer, clear and definite, referring to accompanying drawing, developing simultaneously, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Organic waste gas treatment equipment of the present invention is connected with the exhaust outlet of printing equipment, for the organic exhaust gas in intaglio printing workshop is processed, refer to Fig. 1, it comprises air inlet pipe 10, adsorption plant 20, blast pipe 30, negative pressure heating device 40, resolves condensing unit 50, resolves heater 60, condensate recycling device 70 and heater 90.
One end of described air inlet pipe 10 is communicated with the exhaust outlet (not shown) of described printing equipment, the other end of air inlet pipe 10 is communicated with the air inlet of adsorption plant 20, the organic exhaust gas of discharging for inputting printing equipment, and organic exhaust gas is entered in adsorption plant 20, by 20 pairs of described organic exhaust gas of adsorption plant, carrying out filtration treatment makes organic exhaust gas be separated into solvent gas and tail gas, solvent gas molecule is adsorbed on the molecular sieve of adsorption plant 20, the gas outlet of described adsorption plant 20 is communicated with described blast pipe 30, the tail gas of adsorption plant 20 separation is discharged from blast pipe 30.
The air inlet of described adsorption plant 20 is also communicated with described negative pressure heating device 40, and described negative pressure heating device 40, parsing condensing unit 50, parsing heater 60 are connected successively with condensate recycling device 70.By adsorption plant 20 isolated by filtration solvent gas out, the negative pressure being produced by negative pressure heating device 40, from the air inlet of adsorption plant 20, enter negative pressure heating device 40, by negative pressure heating device 40, carry out heat treatment simultaneously, under the heated and pressurized air effect of negative pressure heating device 40, by the organic gas molecule desorption of absorption on adsorption plant 20, form solvent gas, and solvent gas is sent into and resolved in condensing unit 50, by resolving condensing unit 50, solvent gas cooled is become to liquid.
Described parsing heater 60 is according to the solvent gas after the boiling point heating-condensing of each mixture in solvent gas, make mixture be separated into some gaseous state regenerants, then by condensate recycling device 70, described some gaseous state regenerants are condensed into liquid and reclaim.
Described heater 90 is for providing thermal source to negative pressure heating device 40 and parsing heater 60, and this heater can adopt traditional electrically heated mode, and the present invention is preferably solar energy heating, can utilize the energy, saves electric energy.In the present embodiment, described heater 90 comprises Fei Nier lens, vacuum tube, storage assembly and the first heating component, adopt Fei Nier lens focus mode of heating, by Fei Nier lens focus solar energy heating vacuum tube, and by storage assembly heat, described the first heating component is arranged in negative pressure heating device 40, for giving the solvent gas-heated of negative pressure extracting.
Wherein, described adsorption plant 20 comprises: at least two absorption modules 201, when the absorption of an absorption module 201 is saturated, is switched to another absorption module 201 and carries out absorption work.In order to realize Based Intelligent Control, the place, gas outlet of described absorption module 201 is provided with the detector 80 that whether meets discharge standard for detection of tail gas, described organic waste gas treatment equipment also comprises that at least two for controlling the first control valve 202 of the air-flow break-make of air inlet pipe 10, at least two for control blast pipe 30 air-flow break-make the second control valve 203 and for according to the testing result of detector 80, control the control device (not shown) of the open/close states of corresponding the first control valve 202 and the second control valve 203.
Described control device is connected with detector 80, the first control valve 202 and the second control valve 203, and described the first control valve 202 is installed in air inlet pipe 10, and the second control valve 203 is installed on blast pipe 30.In the embodiment of the present invention, owing to adsorbing the gas outlet of module 201, be communicated with blast pipe 30, the place, gas outlet that described detector 80 can adsorb module 201 at each arranges respectively one, also can a detector be only set on blast pipe 30, and the present invention is not restricted this.
And each absorption module 201 is provided with first control valve 202 and second control valve 203, absorption module 201 can adopt triple valve to be connected afterwards with air inlet pipe 10 with negative pressure heating device 40.When the tail gas that detects absorption module 201 discharges of adsorbing work when detector 80 does not meet relevant criterion, to control device feedback switching signal, make control device switch another absorption module 201 work, close the first control valve 202 and second control valve 203 of current absorption module 201, open the first control valve 202 and second control valve 203 of another absorption module 201, make current absorption module 201 stop absorption work, make another absorption module 201 start absorption work simultaneously.Now, control device also can be controlled negative pressure heating device 40 and starts to carry out negative pressure and heat work, the solvent gas that current absorption module 201 is separated is directly entered in negative pressure heating device 40 by air inlet, after negative pressure heating device 40 heat treatments, enter and resolve in condensing unit 50.The present invention adopts the alternately working method of absorption of at least two absorption modules 201, and the organic exhaust gas that printing equipment is discharged can uninterruptedly be processed, and has improved operating efficiency.
In order to improve adsorption effect, described absorption module 201 comprises one-level adsorption tower 204 and the secondary absorption tower 205 being communicated with one-level adsorption tower 204, in described one-level adsorption tower 204 and secondary absorption tower 205, is provided with for filtering the molecular sieve of organic exhaust gas.After one-level adsorption tower 204 adsorption treatment, by secondary absorption tower 205, further adsorbed, further filter the solvent gas in organic exhaust gas, make tail gas meet discharge standard.Molecular sieve derives from physical absorption to the absorption of material, and there are very strong polarity and Coulombian field in its inside, crystal hole, and polar molecule and unsaturated molecule are shown to strong adsorption capacity, so suction-operated is good, and the life-span of molecular sieve is long, and its cost is lower.
See also Fig. 2, described parsing condensing unit 50 comprises the first condenser coil 501 and the first air-cooler 502, one end of the first condenser coil 501 is communicated with negative pressure heating device 40, and the other end of the first condenser coil 501 is communicated with parsing heater 60, for delivery of solvent gas.Described the first air-cooler 502 is positioned at a side of the first condenser coil 501, for processing that described the first condenser coil 501 is lowered the temperature.
During concrete enforcement, the side that the first condenser coil 501 is positioned at negative pressure heating device 40 can be positioned at a side of resolving heater 60 a little more than it, while passing into the solvent gas after negative pressure heating in the first condenser coil 501, by 502 pairs of the first condenser coils 501 of the first Air cooler of the first condenser coil 501 1 sides, blow a cold wind over and make solvent gas cooled become liquid inflow to resolve in heater 60.Wherein, described the first condenser coil 501 bendings, coiling, make air-cooled can abundant cooling solvent gas.Certainly, in other embodiments, resolving condensing unit 50 also can adopt condenser pipe cooling to process, as entering, the solvent gas after negative pressure heating resolves in condensing unit 50, by the processing of lowering the temperature of logical running water in condenser pipe, make solvent gas cooled become liquid, the present invention is not restricted this.
Please continue to refer to Fig. 1 and Fig. 2, described parsing heater 60 comprises resolves heating tank 601, described heater 90 also comprises the second heating component 901, for detection of the temperature inductor (not shown) of heating-up temperature with for controlling the temperature controller 902 of heating-up temperature.Wherein, described the second heating component 901 is installed on described parsing heating tank 601, and described temperature controller 902 connects described the second heating component 901 and temperature inductor; By temperature inductor, detect the temperature of resolving aqueous solvent gas in heating tank 601, and feed back to temperature controller 902, the heating-up temperature of boiling point control second heating component 901 of the gaseous state regenerant being reclaimed according to current need by temperature controller 902.Certain this temperature controller 902 can also be controlled the heating-up temperature with a heating component.
Described parsing heating tank 601 is communicated with parsing condensing unit 50 and condensate recycling device 70, by the gaseous state regenerant adding after thermal release, sends in condensate recycling device 70.In order to improve the purity of gaseous state regenerant, on described parsing heating tank 601, be also provided for by resolve heating tank 601 pressurized treatments force (forcing) pump 602.
Wherein, on described parsing heating tank 601, be provided with pressure regulating mechanism (not shown), explosion relief valve 603 and Pressure gauge 604, by Pressure gauge 604, show the pressure index of resolving heating tank 601, thereby can resolve according to pressure size adjustment the pressure of heating tank 601.Pressure regulating mechanism is for increasing air pressure to resolving heating tank 601, and by carrying out pressurized treatments to resolving heating tank 601, the air pressure that makes to resolve in heating tank 601 raises, thereby the boiling point of solvent gas is reduced, thereby saves the energy, improves analyzing efficiency.And, resolving the security that explosion relief valve 603 increase systems are set on heating tank 601.
During concrete enforcement, described the second heating component 901 can adopt resistance wire or other heaters, and can be arranged on and resolve on the bottom and sidewall that heating tank 601 takes out, making to resolve heating tank 601 is heated evenly, make the temperature constant of liquid solvent mist, thereby can further improve the purity of gaseous state regenerant.
Please again consult Fig. 1 and Fig. 2, described condensate recycling device 70 comprises the second condenser coil 701 for delivery of some gaseous state regenerants, for to described the second condenser coil 701 lower the temperature processing the second air-cooler 702 and for reclaiming the fluid reservoir 703 of solution, one end of described the second condenser coil 701 is communicated with described parsing heater 60(and resolves heating tank 601), the other end of the second condenser coil 701 is communicated with described fluid reservoir 703, and can at the other end of the second condenser coil 701, increase negative pressure enters in the second condenser coil 701 the gaseous state regenerant after evaporation, by being arranged in the cooling liquid that again becomes of the second air-cooler 702 of described the second condenser coil 701 1 sides, flow into fluid reservoir 703.Because the type of cooling of the second condenser coil 701 and the second air-cooler 702 is identical with cooling principle and the structure of resolving condensing unit 50 in detail, the second condenser coil 701 and second air-cooler 702 structures and the type of cooling are no longer described in detail herein.
In the present embodiment, described fluid reservoir 703 can disassemble from the other end of the second condenser coil 701, its quantity arranges according to the kind of gaseous state regenerant, and the regenerant reclaiming as need has 5 kinds, and 5 fluid reservoirs 703 can be set at the other end of the second condenser coil 701.Certainly in order to reduce the volume of equipment, the present invention also can only install a fluid reservoir 703, after having reclaimed a kind of regenerant, then changes fluid reservoir and reclaims another regenerant.
In specific implementation process, owing to having the boiling point of partially recycled thing in solvent gas higher than the boiling point of water, in order to improve gaseous state regenerant purity, can also be after having reclaimed the regenerant of low boiling (its boiling point is lower than the boiling point of water), recycle-water again, reclaims the regenerant of higher boiling (its boiling point is higher than the boiling point of water) afterwards again.
Certainly, the present invention can also set up dewater unit between fluid reservoir 703 and the other end of the second condenser coil 701, makes condensed solvent water content below 0.5%, thereby improves the purity of regenerant.Its dewatering type comprises molecular sieve dehydration, by adding desiccant dryness, add the dehydrating agent dewatering type such as dry that refluxes, it is present technology, is not described further herein.
Further in embodiment, the pipeline connecting between described air inlet pipe 10, blast pipe 30, adsorption plant 20, negative pressure heating device 40, parsing condensing unit 50, parsing heater 60 and condensate recycling device 70 is provided with control valve, thereby control the break-make of air-flow or liquid, and also can set up gas detector in the parts that have gas to pass through, carry out the concentration of probe gas, as can be gas detector be set in fluid reservoir 703, detect the gas concentration of current regenerant, thereby determine that whether changing fluid reservoir 703 reclaims other regenerant.
Further, in embodiment, described negative pressure heating device 40, parsing condensing unit 50 and condensate recycling device 70 all vacuumize processing, prevent entrained air in solvent gas.
Organic waste gas treatment equipment based on above-mentioned, the present invention is the corresponding organic exhaust gas that provides a kind of organic waste gas treatment method to process intaglio printing workshop also, refers to Fig. 3, and described organic waste gas treatment method comprises:
The organic exhaust gas that S10, printing equipment are discharged is inputted in adsorption plant by air inlet pipe, carries out filtration treatment and makes organic exhaust gas be separated into solvent gas and tail gas, and discharge described tail gas by blast pipe by adsorption plant;
S20, by negative pressure heating device, described solvent gas is carried out to negative pressure and heat treatment, and solvent gas is sent into resolve in condensing unit, make the solvent gas cold liquid that congeals into;
S30, by resolving heater according to the boiling point of each mixture in liquid solvent mist, heat liquid solvent gas, make liquid solvent mist be separated into some gaseous state regenerants;
S40, by condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim.
Wherein, described S10 specifically comprises: the organic exhaust gas that printing equipment is discharged is inputted in an absorption module by air inlet pipe, carries out filtration treatment make organic exhaust gas be separated into solvent gas and tail gas by this absorption module; Afterwards, by blast pipe, discharge described tail gas, and by detector, detect tail gas and whether meet discharge standard; If detector detects tail gas while not meeting discharge standard, the first control valve of import department and second control valve in its exit of by control device, controlling this absorption module are closed; Make the first control valve of import department and the second control valve unlatching in its exit of another absorption module make another absorption module carry out absorption work simultaneously.Specifically refer to above-described embodiment.
Further, described step S30 specifically comprises: force (forcing) pump will be resolved heating tank pressurization; Afterwards, by resolving heater according to the boiling point of each mixture in liquid solvent mist, by boiling point order from low to high, heat successively liquid solvent gas; By temperature inductor, detect in real time the temperature of liquid solvent mist, and feed back to temperature controller, by temperature controller, control the heating-up temperature of heating component simultaneously.Specifically refer to above-described embodiment.
Take below in organic exhaust gas containing as ethyl acetate, ortho-xylene and isopropyl alcohol as example, organic waste gas treatment equipment and the processing method thereof in intaglio printing of the present invention workshop being elaborated:
The organic exhaust gas that the first step, printing equipment are discharged is inputted in adsorption plant by air inlet pipe, carries out filtration treatment and makes organic exhaust gas be separated into solvent gas and tail gas, and discharge described tail gas by blast pipe by adsorption plant.
After solvent gas is separated with tail gas, the top of adsorption plant is divided into tail gas by emission by exhaust pipe, and the below of adsorption plant is the solvent gas after separation, and it is the mist of ethyl acetate, ortho-xylene and isopropyl alcohol.
Second step, by negative pressure heating device, described solvent gas is carried out to negative pressure and heat treatment, and solvent gas is sent into resolve in condensing unit, make the solvent gas cold liquid that congeals into.The mode that the present embodiment only need adopt negative pressure, add low temperature (as 40-50 ℃) makes mist extract out from the air inlet of adsorption plant, and send into resolve in condensing unit and make it be cooled to mixed solution, in the present embodiment, therefore above-mentioned mist gets final product liquefy under normal temperature condition, resolves condensing unit and only need blow a cold wind over and can make mist become liquid.
The 3rd step, by resolving heater, according to the boiling point of each mixture in liquid solvent mist, heat liquid solvent gas, make liquid solvent mist be separated into some gaseous state regenerants.
The 4th step, by condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim.
In the present embodiment, need first to resolving heating tank, to take out pressurized treatments, prevent entrained air in solvent gas, then, by temperature controller, according to the heating-up temperature of the boiling point control heating component of ethyl acetate, ortho-xylene and isopropyl alcohol, evaporate respectively mixed solution.
For example: the boiling point of ethyl acetate is that 77.2 ℃, the boiling point of ortho-xylene are that 144.4 ℃, the boiling point of isopropyl alcohol are 80.3 ℃.When separated heating, can first solution be heated to 77.5 ℃, make ethyl acetate evaporation, then reduce and reclaim this solution by condensate recycling device, after ethyl acetate has reclaimed, then change fluid reservoir and reclaim successively in a manner described isopropyl alcohol, water and ortho-xylene.Certainly the recovery of water and ortho-xylene also can adopt ortho-xylene is distilled to reclaim, and improves the purity of ortho-xylene.In resolving heating tank 601 in the present invention, carried out pressurized treatments, so the boiling point that the boiling point of each mixture of above-mentioned organic exhaust gas in resolving heating tank 601 likely can above-mentionedly be given an example is lower, the heating-up temperature of therefore resolving heating tank 601 also can arrange according to the pressure of resolving heating tank 601.
In sum, the present invention only needs lower cost just can make the waste gas of printing equipment meet discharge standard, meets environmental requirement, and the solvent gas after separation can press composition and reclaim, thereby can reuse, and saves a large amount of material costs.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. the organic waste gas treatment equipment in intaglio printing workshop, is connected with the exhaust outlet of printing equipment, it is characterized in that, comprising:
For inputting the air inlet pipe of the organic exhaust gas of printing equipment discharge;
For being carried out to filtration treatment, described organic exhaust gas make described organic exhaust gas be separated into the adsorption plant of solvent gas and tail gas; Wherein said solvent gas absorption is on the molecular sieve of adsorption plant;
For discharging the blast pipe of described tail gas;
Described in being used for inciting somebody to action, be adsorbed on solvent gas on molecular sieve and, by negative pressure and heat treatment, make solvent desorbing gas, and solvent gas is sent into the negative pressure heating device of resolving condensing unit;
For making the congeal into parsing condensing unit of liquid of solvent gas cold;
For according to the solvent gas after the boiling point heating-condensing of each mixture of solvent gas, make mixture be separated into the parsing heater of some gaseous state regenerants;
For the condensate recycling device that described some gaseous state regenerants are condensed into liquid and reclaim;
One end of described air inlet pipe is communicated with the exhaust outlet of described printing equipment, the other end of air inlet pipe is communicated with the air inlet of adsorption plant, the gas outlet of adsorption plant is communicated with described blast pipe, the air inlet of described adsorption plant is also communicated with described negative pressure heating device, and described negative pressure heating device, parsing condensing unit, parsing heater are connected successively with condensate recycling device.
2. the organic waste gas treatment equipment in intaglio printing according to claim 1 workshop, is characterized in that, described adsorption plant comprises: at least two absorption modules, are provided with the detector that whether meets discharge standard for detection of tail gas on described absorption module; Described organic waste gas treatment equipment also comprises that at least two for controlling the first control valve of the air-flow break-make of air inlet pipe, at least two for control blast pipe air-flow break-make the second control valve and for according to the testing result of detector, control the control device of the open/close states of corresponding the first control valve and the second control valve; Described control device is connected with detector, the first control valve and the second control valve, and described the first control valve is installed in air inlet pipe, and the second control valve is installed on blast pipe.
3. the organic waste gas treatment equipment in intaglio printing according to claim 2 workshop, it is characterized in that, described absorption module comprises one-level adsorption tower and the secondary absorption tower being communicated with one-level adsorption tower, in described one-level adsorption tower and secondary absorption tower, is provided with the molecular sieve for filtering exhaust.
4. the organic waste gas treatment equipment in intaglio printing according to claim 1 workshop, it is characterized in that, described parsing condensing unit comprises the first condenser coil for delivery of solvent gas, for first air-cooler of described the first condenser coil being lowered the temperature and processing; One end of described the first condenser coil is communicated with negative pressure heating device, and the other end of the first condenser coil is communicated with parsing heater; Described the first air cooler position is in a side of the first condenser coil.
5. the organic waste gas treatment equipment in intaglio printing according to claim 1 workshop, is characterized in that, described parsing heater comprises resolves heating tank and for to resolving the force (forcing) pump of heating tank pressurized treatments; Described parsing heating tank is communicated with parsing condensing unit and condensate recycling device, and described force (forcing) pump is installed on described parsing heating tank;
Described organic waste gas treatment equipment also comprises heater, and described heater comprises the second heating component, for detection of the temperature inductor of heating-up temperature with for controlling the temperature controller of heating-up temperature; Described the second heating component is installed on described parsing heating tank, and described temperature controller connects described the second heating component and temperature inductor.
6. the organic waste gas treatment equipment in intaglio printing according to claim 1 workshop, it is characterized in that, described condensate recycling device comprises the second condenser coil for delivery of some gaseous state regenerants, the second air-cooler of processing for described the second condenser coil is lowered the temperature and for reclaiming the fluid reservoir of solution, one end of described the second condenser coil is communicated with described parsing heater, the other end of the second condenser coil is communicated with described fluid reservoir, and described the second air cooler position is in a side of described the second condenser coil.
7. the organic waste gas treatment equipment in intaglio printing according to claim 6 workshop, is characterized in that, described fluid reservoir comprises the water tank for recycle-water, and described water tank is communicated with the other end of the second condenser coil.
8. an organic waste gas treatment method, the organic exhaust gas for the treatment of intaglio printing workshop, is characterized in that, comprising:
The organic exhaust gas that A, printing equipment are discharged is inputted in adsorption plant by air inlet pipe, carries out filtration treatment and makes organic exhaust gas be separated into solvent gas and tail gas, and discharge described tail gas by blast pipe by adsorption plant;
B, by negative pressure heating device, described solvent gas is carried out to negative pressure and heat treatment, and solvent gas is sent into resolve in condensing unit, make the solvent gas cold liquid that congeals into;
C, by resolving heater, according to the boiling point of each mixture in liquid solvent mist, heat liquid solvent gas, make liquid solvent mist be separated into some gaseous state regenerants;
D, by condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim.
9. organic waste gas treatment method according to claim 8, is characterized in that, described steps A specifically comprises:
The organic exhaust gas that A1, printing equipment are discharged is inputted in an absorption module by air inlet pipe, carries out filtration treatment make organic exhaust gas be separated into solvent gas and tail gas by this absorption module;
A2, by blast pipe, discharge described tail gas, and by detector, detect tail gas and whether meet discharge standard;
If A3 detector detects tail gas while not meeting discharge standard, the first control valve of import department and second control valve in its exit of by control device, controlling this absorption module are closed; Make the first control valve of import department and the second control valve unlatching in its exit of another absorption module make another absorption module carry out absorption work simultaneously.
10. organic waste gas treatment method according to claim 8, is characterized in that, described step C specifically comprises:
C1, force (forcing) pump will be resolved heating tank pressurization;
C2, by resolving heater according to the boiling point of each mixture in liquid solvent mist, by boiling point order from low to high, heat successively liquid solvent gas; By temperature inductor, detect in real time the temperature of liquid solvent mist, and feed back to temperature controller, by temperature controller, control the heating-up temperature of heating component simultaneously.
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Address after: 518057 Guangdong city of Shenzhen province Nanshan District science and technology science and technology building Jinjia road two Patentee after: SHENZHEN JINJIA GROUP CO., LTD. Patentee after: Anhui Antai New Style Packing Materials Co., Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District science and technology science and technology building Jinjia road two Patentee before: Shenzhen Jinjia Color Printing Group Co., Ltd. Patentee before: Anhui Antai New Style Packing Materials Co., Ltd. |