CN103752127B - The organic waste gas treatment equipment in intaglio printing workshop and processing method thereof - Google Patents
The organic waste gas treatment equipment in intaglio printing workshop and processing method thereof Download PDFInfo
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Abstract
The invention discloses organic waste gas treatment equipment and the processing method thereof in intaglio printing workshop, wherein, organic waste gas treatment equipment carries out filtration treatment by adsorption plant to the organic exhaust gas that printing equipment discharges makes organic exhaust gas be separated into solvent mist and tail gas, and discharges described tail gas by blast pipe; And the solvent mist after filtering carries out negative pressure and heat treatment by negative pressure heating device, and solvent Mixed Gas Condensation is made to become liquid by solvent mist feeding parsing condensing unit; Afterwards by resolving heater according to the boiling point heating liquid solvent mist of mixture each in liquid solvent mist, liquid solvent mist is made to 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 low cost that the waste gas of printing equipment just can be made to meet discharge standard to meet environmental requirement, and the solvent mist after being separated can press composition recovery, saves a large amount of material costs.
Description
Technical field
The present invention relates to the VOCs treatment technical field of machine room, particularly a kind of organic waste gas treatment equipment of intaglio printing workshop and processing method thereof.
Background technology
Printing enterprise, when intaglio printing is produced, needs in ink, add a large amount of solvents (e.g., isopropyl alcohol, ethyl acetate, ethanol, butyl acetate etc.), to adjust the viscosity, thixotropy, mobility etc. of ink, makes ink be more suitable for print production.Meanwhile, gravure printing ink is liquid ink inherently, also there is a large amount of solvents in ink.After in production process, ink transfers to paper surface from forme, needing 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, in direct discharged air, by contaminated environment, the organic exhaust gas to printing equipment produces therefore is needed to process.
At present, the general method adopting adsorption tower to filter or to burn processes organic exhaust gas, makes emission gases meet discharge standard.Wherein, when adopting adsorption tower process waste gas, activated carbon need be added in adsorption tower, utilize charcoal absorption organic exhaust gas, after charcoal absorption is saturated, use water vapour and or nitrogen carry out in Detachment Activity charcoal solvent mist organic solvent molecule, this mode needs to regularly replace the activated carbon in adsorption tower, and its cost is high.Adopt steam separating process, water content in recovered solvent can be caused too high, regenerative ratio can not be directly used in and use.Adopt nitrogen separating process, also need to increase nitrogen making machine, cost is high and there is certain potential safety hazard.Therefore this exhaust-gas treatment effect is undesirable; When adopting combustion system process organic exhaust gas, needing to be mixed into natural gas igniting in the offgas, making mist burning generate carbon dioxide and directly discharging, but this mode needs to be mixed 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, major part is the solvent of volatilization, if effectively can reclaim these solvents, can reuse, will save purchase cost to enterprise.
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 a kind of organic waste gas treatment equipment and processing method thereof of intaglio printing workshop, can process the organic exhaust gas of printing equipment discharge when low cost, make it meet discharge standard, and the solvent in organic exhaust gas can also be reclaimed.
In order to achieve the above object, this invention takes following technical scheme:
The organic waste gas treatment equipment in intaglio printing workshop, be connected with the exhaust outlet of printing equipment, it comprises:
For inputting the air inlet pipe of the organic exhaust gas that printing equipment is discharged;
Make organic exhaust gas be separated into the adsorption plant of solvent mist and tail gas for carrying out filtration treatment to described organic exhaust gas, wherein said solvent mixed gas sorption is on the molecular sieve of adsorption plant;
For discharging the blast pipe of described tail gas;
For by described absorption over a molecular sieve solvent mist by negative pressure and heat treatment, make solvent mist desorption, and solvent mist sent into resolve the negative pressure heating device of condensing unit;
For the parsing condensing unit making solvent Mixed Gas Condensation become liquid;
For according to the solvent mist after the boiling point heating-condensing of mixture each in solvent mist, mixture is made to be separated into the parsing heater of some gaseous state regenerants;
For described some gaseous state regenerants being condensed into liquid and the condensate recycling device reclaimed;
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, described absorption module is provided with the detector whether meeting discharge standard for detecting tail gas; Described organic waste gas treatment equipment also comprises at least two for controlling the first control valve of the air-flow break-make of air inlet pipe, at least two for control the air-flow break-make of blast pipe the second control valve and for the testing result according to detector, control the control device of the open/close states of corresponding 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 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, the secondary absorption tower that described absorption module comprises primary adsorption tower and is communicated with primary adsorption tower, is provided with the molecular sieve for filtering organic exhaust gas in described primary adsorption tower and secondary absorption tower.
In the organic waste gas treatment equipment in described intaglio printing workshop, described parsing condensing unit comprises the first condenser coil for delivery solvent mist, for carrying out the first air-cooler processed of lowering the temperature to described first condenser coil; One end of described 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 first air cooler position is in the 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 the force (forcing) pump of resolving heating tank pressurized treatments; Described parsing heating tank is communicated with condensate recycling device with parsing condensing unit, 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 detecting the temperature inductor of heating-up temperature and the temperature controller for controlling heating-up temperature; Described second heating component is installed on described parsing heating tank, and described temperature controller connects described second heating component and temperature inductor.
In the organic waste gas treatment equipment in described intaglio printing workshop, described condensate recycling device comprises for carrying the second condenser coil of some gaseous state regenerants, for carrying out lower the temperature the second air-cooler of process and the fluid reservoir for reclaiming solution to described second condenser coil, one end of described 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 second air cooler position is in the side of described 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.
A kind of 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, by air inlet pipe input adsorption plant, carries out filtration treatment by adsorption plant and makes waste gas be separated into solvent mist and tail gas, and discharge described tail gas by blast pipe;
B, by negative pressure heating device, described solvent mist is carried out negative pressure and heat treatment, and solvent mist is sent into resolve in condensing unit make solvent Mixed Gas Condensation become liquid;
C, by parsing heater according to the boiling point heating liquid solvent mist of mixture each in liquid solvent mist, 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 mist and tail gas by this absorption module;
A2, discharge described tail gas by blast pipe, and detect tail gas by detector and whether meet discharge standard;
If when A3 detector detection tail gas does not meet discharge standard, then the second control valve of the first control valve and its exit that are controlled the import department of this absorption module by control device is closed; Make the first control valve of the import department of another absorption module and second control valve in its exit open simultaneously and make another absorption module carry out absorption work.
In described organic waste gas treatment method, described step C specifically comprises:
C1, force (forcing) pump will resolve heating tank pressurization;
C2, by parsing heater according to the boiling point of mixture each in liquid solvent mist, by boiling point order heating liquid solvent mist successively from low to high; Detected the temperature of liquid solvent mist simultaneously by temperature inductor in real time, and feed back to temperature controller, controlled the heating-up temperature of heating component by temperature controller.
Compared to prior art, the organic waste gas treatment equipment in intaglio printing workshop provided by the invention and processing method thereof, carrying out filtration treatment by adsorption plant to the organic exhaust gas that printing equipment discharges makes organic exhaust gas be separated into solvent mist and tail gas, and discharges described tail gas by blast pipe; And the solvent mist after filtering carries out negative pressure and heat treatment by negative pressure heating device, and solvent Mixed Gas Condensation is made to become liquid by solvent mist feeding parsing condensing unit; Afterwards by resolving heater according to the boiling point heating liquid solvent mist of mixture each in liquid solvent mist, liquid solvent mist is made to 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 that the waste gas of printing equipment just can be made to meet discharge standard to meet environmental requirement, and the solvent mist after being separated can press composition recovery, thus 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 workshop provided by the invention.
Fig. 2 is the structural representation of parsing condensing unit, parsing heater and condensate recycling device in the organic waste gas treatment equipment in intaglio printing workshop provided by the invention.
Fig. 3 is the flow chart of organic waste gas treatment method provided by the invention.
Detailed description of the invention
The invention provides a kind of organic waste gas treatment equipment and processing method thereof of intaglio printing workshop, for making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, 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, be 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 processing the organic exhaust gas in intaglio printing workshop, 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, for inputting the organic exhaust gas that printing equipment is discharged, and make organic exhaust gas enter in adsorption plant 20, carrying out filtration treatment by adsorption plant 20 to described organic exhaust gas makes organic exhaust gas be separated into solvent mist and tail gas, solvent mist Molecular Adsorption is 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 that adsorption plant 20 is separated 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 mist out, the negative pressure produced by negative pressure heating device 40, enter negative pressure heating device 40 from the air inlet of adsorption plant 20, carry out heat treatment by negative pressure heating device 40 simultaneously, under the heated and pressurized air effect of negative pressure heating device 40, by the organic gas desorbing molecules of absorption on adsorption plant 20, form solvent mist, and solvent mist is sent in parsing condensing unit 50, by parsing condensing unit 50, solvent mist is cooled to liquid.
Described parsing heater 60 is according to the solvent mist after the boiling point heating-condensing of mixture each in solvent mist, 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 provides thermal source for giving negative pressure heating device 40 and resolving 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 first heating component is arranged in negative pressure heating device 40, for heating to the solvent mist of negative pressure extracting.
Wherein, described adsorption plant 20 comprises: at least two absorption modules 201, when an absorption module 201 adsorbs saturated, is switched to another absorption module 201 and carries out absorption work.In order to realize Based Intelligent Control, the gas outlet place of described absorption module 201 is provided with the detector 80 whether meeting discharge standard for detecting tail gas, described organic waste gas treatment equipment also comprises 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 the air-flow break-make of blast pipe 30 the second control valve 203 and for the testing result according to detector 80, control the control device (not shown) of the open/close states of corresponding first control valve 202 and the second control valve 203.
Described control device is connected with detector 80, first control valve 202 and the second control valve 203, and described 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, because the gas outlet of adsorbing module 201 is communicated with blast pipe 30, described detector 80 can arrange one respectively at the gas outlet place of each absorption module 201, and also only can arrange a detector on blast pipe 30, the present invention is not restricted this.
Further, each absorption module 201 is provided with first control valve 202 and second control valve 203, and absorption module 201 can adopt triple valve to be connected with after air inlet pipe 10 and negative pressure heating device 40.When the tail gas that detector 80 detects absorption module 201 discharge carrying out absorption work does not meet relevant criterion, to control device feedback switching signal, make control device switch another absorption module 201 to work, namely the first control valve 202 and the second control valve 203 of current absorption module 201 is closed, open the first control valve 202 and the second control valve 203 of another absorption module 201, make current absorption module 201 stop absorption work, make another absorption module 201 start to adsorb work simultaneously.Now, control device also can control negative pressure heating device 40 to start to carry out negative pressure and work of heating, the solvent mist that current absorption module 201 is separated directly enters in negative pressure heating device 40 by air inlet, after negative pressure heating device 40 heat treatment, enter and resolve in condensing unit 50.The present invention adopts the working method of at least two absorption module 201 alternating sorbent, and the organic exhaust gas that printing equipment is discharged can uninterruptedly process, and improves operating efficiency.
In order to improve adsorption effect, the secondary absorption tower 205 that described absorption module 201 comprises primary adsorption tower 204 and is communicated with primary adsorption tower 204, is provided with the molecular sieve for filtering organic exhaust gas in described primary adsorption tower 204 and secondary absorption tower 205.After primary adsorption tower 204 adsorption treatment, adsorbed further by secondary absorption tower 205, filter the solvent mist in organic exhaust gas further, make tail gas meet discharge standard.The absorption of molecular sieve to material derives from physical absorption, and there are very strong polarity and Coulombian field in its inside, crystal hole, and go out strong adsorption capacity to polar molecule and unsaturated molecule displays, therefore 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 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, for delivery solvent mist with parsing heater 60.Described first air-cooler 502 is positioned at the side of the first condenser coil 501, for carrying out cooling process to described first condenser coil 501.
During concrete enforcement, the side that first condenser coil 501 is positioned at negative pressure heating device 40 can be positioned at the side of resolving heater 60 a little more than it, during solvent mist pass into negative pressure heating in the first condenser coil 501 after, by the first Air cooler 502 of the first condenser coil 501 side the first condenser coil 501 blown a cold wind over and make solvent mist be cooled to liquid inflow to resolve in heater 60.Wherein, described first condenser coil 501 is bending, coiling, makes air-cooledly can fully cool solvent mist.Certainly, in other embodiments, resolve condensing unit 50 and also can adopt condenser pipe cooling process, resolve in condensing unit 50 as the solvent mist after negative pressure heating enters, cooling process is carried out by running water logical in condenser pipe, make solvent mist be cooled to liquid state, 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 detecting the temperature inductor (not shown) of heating-up temperature and the temperature controller 902 for controlling heating-up temperature.Wherein, described second heating component 901 is installed on described parsing heating tank 601, and described temperature controller 902 connects described second heating component 901 and temperature inductor; Detected the temperature of resolving aqueous solvent mist in heating tank 601 by temperature inductor, and feed back to temperature controller 902, by the heating-up temperature of temperature controller 902 according to boiling point control second heating component 901 of the current gaseous state regenerant that need reclaim.Certainly this temperature controller 902 can also control the heating-up temperature with a heating component.
Described parsing heating tank 601 is communicated with condensate recycling device 70 with parsing condensing unit 50, will add the gaseous state regenerant after thermal release, sends in condensate recycling device 70.In order to improve the purity of gaseous state regenerant, described parsing heating tank 601 is also arranged be used for by resolve heating tank 601 pressurized treatments force (forcing) pump 602.
Wherein, described parsing heating tank 601 is provided with pressure regulating mechanism (not shown), explosion relief valve 603 and Pressure gauge 604, shown the pressure index of resolving heating tank 601 by Pressure gauge 604, thus the pressure of heating tank 601 can be resolved according to pressure size adjustment.Pressure regulating mechanism is used for increasing air pressure in parsing heating tank 601, by carrying out pressurized treatments to parsing heating tank 601, the air pressure in parsing heating tank 601 being raised, thus the boiling point of solvent mist is reduced, thus economize energy, improve analyzing efficiency.Further, parsing heating tank 601 arranges the security that explosion relief valve 603 increases system.
During concrete enforcement, described second heating component 901 can adopt resistance wire or other heaters, and can be arranged on and resolve on heating tank 601 bottom of taking out and sidewall, parsing heating tank 601 is heated evenly, make the temperature constant of liquid solvent mist, thus 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 carrying some gaseous state regenerants, for carrying out lower the temperature the second air-cooler 702 of process and the fluid reservoir 703 for reclaiming solution to described second condenser coil 701, one end of described second condenser coil 701 is communicated with described parsing heater 60(and namely resolves heating tank 601), the other end of the second condenser coil 701 is communicated with described fluid reservoir 703, and can enter in the second condenser coil 701 by the gaseous state regenerant after the other end increase negative pressure of the second condenser coil 701 makes evaporation, cooled by the second air-cooler 702 being arranged in described second condenser coil 701 side and again become liquid inflow fluid reservoir 703.Because the second condenser coil 701 is identical with structure with the cooling principle of resolving condensing unit 50 with the type of cooling of the second air-cooler 702 in detail, second condenser coil 701 and second air-cooler 702 structure and the type of cooling is 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 is arranged according to the kind of gaseous state regenerant, and the regenerant as reclaimed has 5 kinds, can arrange 5 fluid reservoirs 703 at the other end of the second condenser coil 701.Certainly in order to reduce the volume of equipment, the present invention also only can install a fluid reservoir 703, after having reclaimed a kind of regenerant, then changes fluid reservoir to reclaim another regenerant.
In specific implementation process, owing to there being the boiling point of boiling point higher than water of partially recycled thing in solvent mist, in order to improve gaseous state regenerant purity, can also after the regenerant having reclaimed 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%, thus improves the purity of regenerant.Its dewatering type comprises molecular sieve dehydration, by adding desiccant dryness, adding the dewatering types such as dehydrating agent backflow drying, it is present technology, is not described further herein.
In further embodiment, the pipeline of described air inlet pipe 10, blast pipe 30, adsorption plant 20, negative pressure heating device 40, parsing condensing unit 50, connection between parsing heater 60 and condensate recycling device 70 is provided with control valve, thus control the break-make of air-flow or liquid, and also can set up gas detector in the parts passed through there being gas, carry out the concentration of probe gas, as gas detector can be arranged in fluid reservoir 703, detect the gas concentration of current regenerant, thus determine whether change fluid reservoir 703 to reclaim other regenerant.
Further in embodiment, described negative pressure heating device 40, parsing condensing unit 50 and condensate recycling device 70 all vacuumize process, prevent from being mixed into air in solvent mist.
Based on above-mentioned organic waste gas treatment equipment, the present invention is also corresponding provides a kind of organic waste gas treatment method to process the organic exhaust gas in intaglio printing workshop, and refer to Fig. 3, described organic waste gas treatment method comprises:
The organic exhaust gas that S10, printing equipment are discharged, by air inlet pipe input adsorption plant, carries out filtration treatment by adsorption plant and makes organic exhaust gas be separated into solvent mist and tail gas, and discharge described tail gas by blast pipe;
S20, by negative pressure heating device, described solvent mist is carried out negative pressure and heat treatment, and solvent mist is sent into resolve in condensing unit make solvent Mixed Gas Condensation become liquid;
S30, by parsing heater according to the boiling point of mixture each in liquid solvent mist, heating liquid solvent mist, makes 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 mist and tail gas by this absorption module; Discharge described tail gas afterwards, by blast pipe, and whether meet discharge standard by detector detection tail gas; If when detector detection tail gas does not meet discharge standard, then the second control valve of the first control valve and its exit that are controlled the import department of this absorption module by control device is closed; Make the first control valve of the import department of another absorption module and second control valve in its exit open simultaneously and make another absorption module carry out absorption work.Specifically refer to above-described embodiment.
Further, described step S30 specifically comprises: force (forcing) pump will resolve heating tank pressurization; Afterwards, by parsing heater according to the boiling point of mixture each in liquid solvent mist, by boiling point order heating liquid solvent mist successively from low to high; Detected the temperature of liquid solvent mist simultaneously by temperature inductor in real time, and feed back to temperature controller, controlled the heating-up temperature of heating component by temperature controller.Specifically refer to above-described embodiment.
Below to be described in detail to the organic waste gas treatment equipment in intaglio printing workshop of the present invention and processing method thereof containing for ethyl acetate, ortho-xylene and isopropyl alcohol in organic exhaust gas:
The organic exhaust gas that the first step, printing equipment are discharged, by air inlet pipe input adsorption plant, carries out filtration treatment by adsorption plant and makes organic exhaust gas be separated into solvent mist and tail gas, and discharge described tail gas by blast pipe.
After solvent mist and tail gas separation, the top of adsorption plant is divided into tail gas by emission by exhaust pipe, and the below of adsorption plant is the solvent mist after being separated, and it is the mist of ethyl acetate, ortho-xylene and isopropyl alcohol.
Second step, by negative pressure heating device, described solvent mist is carried out negative pressure and heat treatment, and solvent mist is sent into resolve in condensing unit make solvent Mixed Gas Condensation become liquid.The present embodiment only need adopt negative pressure, add the mode of low temperature (as 40-50 DEG C) makes mist extract out from the air inlet of adsorption plant, and make it be cooled to mixed solution in feeding parsing condensing unit, in the present embodiment, above-mentioned mist gets final product liquefy under normal temperature condition, and therefore parsing condensing unit only need be blown a cold wind over and mist can be made to become liquid.
3rd step, by parsing heater according to the boiling point heating liquid solvent mist of mixture each in liquid solvent mist, make liquid solvent mist be separated into some gaseous state regenerants.
4th step, by condensate recycling device, described some gaseous state regenerants are condensed into liquid and reclaim.
In the present embodiment, need first to take out pressurized treatments to parsing heating tank, prevent from being mixed into air in solvent mist, then, by the heating-up temperature of temperature controller according to the boiling point control heating component of ethyl acetate, ortho-xylene and isopropyl alcohol, evaporate mixed solution respectively.
Such as: the boiling point of ethyl acetate is 77.2 DEG C, the boiling point of ortho-xylene is 144.4 DEG C, the boiling point of isopropyl alcohol is 80.3 DEG C.When separated heating, first solution can be heated to 77.5 DEG C, ethyl acetate is evaporated, then be reduced by condensate recycling device and reclaim this solution, after ethyl acetate has reclaimed, then change fluid reservoir and reclaim isopropyl alcohol, water and ortho-xylene successively in a manner described.The recovery of certain water and ortho-xylene also can adopt reclaims ortho-xylene distillation, improves the purity of ortho-xylene.Owing to having carried out pressurized treatments in the present invention in parsing heating tank 601, so each mixture of above-mentioned organic exhaust gas resolve the boiling point in heating tank 601 likely can the boiling point of above-mentioned citing lower, the heating-up temperature of therefore resolving heating tank 601 also can be arranged according to the pressure of resolving heating tank 601.
In sum, the present invention only needs lower cost that the waste gas of printing equipment just can be made to meet discharge standard, meets environmental requirement, and the solvent mist after being separated can press composition recovery, thus can reuse, and saves a large amount of material costs.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (5)
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 that printing equipment is discharged;
Described organic exhaust gas is made to be separated into the adsorption plant of solvent mist and tail gas for carrying out filtration treatment to described organic exhaust gas; Wherein said solvent mixed gas sorption is on the molecular sieve of adsorption plant;
For discharging the blast pipe of described tail gas;
For by described absorption over a molecular sieve solvent mist by negative pressure and heat treatment, make solvent mist desorption, and solvent mist sent into resolve the negative pressure heating device of condensing unit;
For the parsing condensing unit making solvent Mixed Gas Condensation become liquid;
For according to the liquid solvent mist after the boiling point heating-condensing of mixture each in liquid solvent mist, mixture is made to be separated into the parsing heater of some gaseous state regenerants;
For described some gaseous state regenerants being condensed into liquid and the condensate recycling device reclaimed;
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;
Described adsorption plant comprises: at least two absorption modules, when the absorption of an absorption module is saturated, is switched to another absorption module and carries out absorption work; Described absorption module is provided with the detector whether meeting discharge standard for detecting tail gas; Described organic waste gas treatment equipment also comprises at least two for controlling the first control valve of the air-flow break-make of air inlet pipe, at least two for control the air-flow break-make of blast pipe the second control valve and for the testing result according to detector, control the control device of the open/close states of corresponding 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 first control valve is installed in air inlet pipe, and the second control valve is installed on blast pipe; When the tail gas that detector detects the absorption module discharge carrying out absorption work does not meet relevant criterion, to control device feedback switching signal, control device is made to switch another absorption module work, namely the first control valve and second control valve of current absorption module is closed, open the first control valve and second control valve of another absorption module, make current absorption module stop absorption work, make another absorption module start to adsorb work simultaneously;
The secondary absorption tower that described absorption module comprises primary adsorption tower and is communicated with primary adsorption tower, is provided with the molecular sieve for filtering exhaust in described primary adsorption tower and secondary absorption tower;
Described negative pressure heating device, parsing condensing unit and condensate recycling device all vacuumize process;
Described parsing heater comprises resolves heating tank and for the force (forcing) pump of resolving heating tank pressurized treatments; Described parsing heating tank is communicated with condensate recycling device with parsing condensing unit, 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 detecting the temperature inductor of heating-up temperature and the temperature controller for controlling heating-up temperature; Described second heating component is installed on described parsing heating tank, and described temperature controller connects described second heating component and temperature inductor.
2. the organic waste gas treatment equipment in intaglio printing workshop according to claim 1, it is characterized in that, described parsing condensing unit comprises the first condenser coil for delivery solvent mist, for carrying out the first air-cooler processed of lowering the temperature to described first condenser coil; One end of described 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 first air cooler position is in the side of the first condenser coil.
3. the organic waste gas treatment equipment in intaglio printing workshop according to claim 1, it is characterized in that, described condensate recycling device comprises for carrying the second condenser coil of some gaseous state regenerants, for carrying out lower the temperature the second air-cooler of process and the fluid reservoir for reclaiming solution to described second condenser coil, one end of described 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 second air cooler position is in the side of described second condenser coil.
4. the organic waste gas treatment equipment in intaglio printing workshop according to claim 3, 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.
5. adopt an organic waste gas treatment method for organic waste gas treatment equipment as claimed in claim 1, for the treatment of the organic exhaust gas in intaglio printing workshop, it is characterized in that, comprising:
The organic exhaust gas that A, printing equipment are discharged, by air inlet pipe input adsorption plant, carries out filtration treatment by adsorption plant and makes organic exhaust gas be separated into solvent mist and tail gas, and discharge described tail gas by blast pipe;
B, by negative pressure heating device, described solvent mist is carried out negative pressure and heat treatment, and solvent mist is sent into resolve in condensing unit make solvent Mixed Gas Condensation become liquid;
C, by parsing heater according to the boiling point heating liquid solvent mist of mixture each in liquid solvent mist, 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;
All process is vacuumized to negative pressure heating device, parsing condensing unit and condensate recycling device;
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 mist and tail gas by this absorption module;
A2, discharge described tail gas by blast pipe, and detect tail gas by detector and whether meet discharge standard;
If when A3 detector detection tail gas does not meet discharge standard, then the second control valve of the first control valve and its exit that are controlled the import department of this absorption module by control device is closed; Make the first control valve of the import department of another absorption module and second control valve in its exit open simultaneously and make another absorption module carry out absorption work;
Described step C specifically comprises:
C1, force (forcing) pump will resolve heating tank pressurization;
C2, by parsing heater according to the boiling point of mixture each in liquid solvent mist, by boiling point order heating liquid solvent mist successively from low to high; Detected the temperature of liquid solvent mist simultaneously by temperature inductor in real time, and feed back to temperature controller, controlled the heating-up temperature of heating component by temperature controller.
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| CN107961642B (en) * | 2017-12-01 | 2020-12-01 | 河北东厚环保科技有限公司 | Oil gas recovery system based on high-flux nano adsorption bed |
| CN107970747B (en) * | 2017-12-01 | 2021-01-29 | 河北东厚环保科技有限公司 | Oil gas automatic recovery system capable of being remotely monitored |
| CN108096987A (en) * | 2018-01-30 | 2018-06-01 | 洛阳天宝环保科技有限公司 | A kind of molecular sieve adsorber secondary absorption air separator of oxygenerator and recovery method |
| CN110860174A (en) * | 2018-08-27 | 2020-03-06 | 江苏中远环保科技有限公司 | Circulating oil-gas separation method |
| CN112057886B (en) * | 2020-09-09 | 2022-03-25 | 山东交通学院 | On-site volatile solvent recovery device and recovery method |
| CN113593915B (en) * | 2020-09-18 | 2022-09-06 | 山西图门新能源有限公司 | Carbon back electric capacity module of high security |
| CN113577808A (en) * | 2021-08-16 | 2021-11-02 | 伯乐氛(北京)环境技术有限公司 | Organic waste gas solvent separation and purification device and purification process |
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| CN101564635B (en) * | 2009-05-27 | 2011-04-06 | 何金星 | Method and device for recovering gas containing water-soluble organic compounds |
| CN102489113B (en) * | 2011-12-16 | 2013-09-18 | 上海同济科蓝环保设备工程有限公司 | Method for recovering organic solvent from organic waste gas |
| CN203737059U (en) * | 2014-01-03 | 2014-07-30 | 深圳劲嘉彩印集团股份有限公司 | Organic waste gas treatment equipment in gravure printing workshop |
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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. |