CN101549249A - Organic exhaust gas processing method and system thereof - Google Patents
Organic exhaust gas processing method and system thereof Download PDFInfo
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- CN101549249A CN101549249A CNA2009100839129A CN200910083912A CN101549249A CN 101549249 A CN101549249 A CN 101549249A CN A2009100839129 A CNA2009100839129 A CN A2009100839129A CN 200910083912 A CN200910083912 A CN 200910083912A CN 101549249 A CN101549249 A CN 101549249A
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Abstract
The present invention provides organic exhaust gas processing method and system thereof. Exhaust gas containing one or various organic solvent generates from production equipment, and first preprocessing by a exhaust gas preprocessing system (I) then entering a adsorption/desorption system (II) for adsorption and desorption, and the desorbed organic solvent entering a recovery system (III) for recycling, part of the desorbed organic solvent being used for production and the others entering a hypoxia hot air generation system (IV) for catalytic combustion to get hypoxia hot air, and using the obtained hypoxia hot air for desorption. Using the recycled organic solvent from the recovery system (III) as fuel to generate hypoxia hot air that making industries incapable of steam or inert gas supply being able to recovery organic solvent exhaust gas without secondary pollution, simultaneity resolving problem of system internal pollution caused by using variety fuels and equipment corrosion caused by steam.
Description
Technical field
The present invention relates to the industrial organic exhaust gas process field, the processing method and the system thereof that particularly relate to a kind of organic exhaust gas are used for that organic solvent in the waste gas that the production process with industries such as medicine, packing, printing, light industry, coating, chemical industry, electronics, applications produces reclaims and recycling.
Background technology
Contain organic solvent in the waste gas that produces in the production process of industries such as medicine, packing, printing, light industry, coating, chemical industry, electronics, application, not only caused the loss of raw material, environment to periphery also produces great pollution simultaneously, when causing economic loss to production, also the health to human body also produces certain harm.These waste gas that contain organic solvent can seriously insulting hematopoietic function, and many organic matters are the carcinogenic substances that bring out human cancer, and wherein CFC is the arch-criminal who causes depletion of the ozone layer, and organic exhaust gas still produces the principal element of photochemical fog in addition.Therefore, we must pay much attention to the governing problem of organic exhaust gas.
Administer both at home and abroad in the recovery technology of organic exhaust gas absorption method and be the comparatively method of widespread usage, in purifying exhaust air, can reclaim the organic solvent in the waste gas.
With the organic solvent in the absorption method processing waste gas, the method for Cai Yonging was with behind the organic solvent in the adsorbents adsorb waste gas in the past, with steam or inert gas adsorbent was carried out desorption again and reclaimed.For example, patent ZL200510200344.8 and patent ZL02233407.6 all require to use the organic solvent in the steam desorption adsorbent in the desorption process of above-mentioned patent after waste gas absorption.And this method is not suitable for the use of the manufacturing enterprise of no steam or inert gas occurrence condition.
Summary of the invention
For the manufacturing enterprise that solves no steam or inert gas occurrence condition is difficult to the problem that desorption reclaims organic solvent, the invention provides a kind of processing method of organic exhaust gas, reclaim organic solvent with hypoxemia hot blast desorption, the organic solvent that reclaims can be used for producing use, the organic solvent that needs a part to reclaim simultaneously be used to take place the hypoxemia hot blast, and this hypoxemia hot blast desorption method does not use the method that steam or inert gas also can desorption recovery organic solvent for the manufacturing enterprise of no steam or inert gas occurrence condition provides.
The present invention also provides a kind of treatment system of organic exhaust gas.
Technical scheme of the present invention is as follows:
A kind of processing method of organic exhaust gas, to carry out adsorbing successively after the preliminary treatment from the waste gas that contains one or more organic solvents that production equipment [16] produces, desorption, recovery, it is characterized in that: the part of the organic solvent that reclaims behind the described recycling step is used for producing uses, another part is used to carry out catalytic combustion and obtains the hypoxemia hot blast; In described desorption, the hypoxemia hot blast that obtains with described catalytic combustion carries out desorption.
Described catalytic combustion carries out in hypoxemia hot blast generation systems (IV), and described hypoxemia hot blast generation systems (IV) comprises hypoxemia hot blast generation equipment [15] and heat exchanger [14], in the hypoxemia hot blast generation equipment [15] catalyst is arranged; With the certain amount of organic solvent that reclaims with rise to uniform temperature through heat exchanger [14] after surrounding air mix after, enter hypoxemia hot blast generation equipment [15] and produce the hypoxemia hot blast by the catalyst burning, the hypoxemia hot blast that produces enters and is used for desorption after heat exchanger [14] is reduced to uniform temperature, and described heat exchanger [14] heats up and carries out in the different passages of heat exchanger [14] respectively with cooling step.
Described absorption and desorption are finished a cover system has the absorption/desorption system (II) of sorbing material promptly in, and the sorbing material in the absorption/desorption system (II) carries out the desorption organic solvent adsorbing organic solvent to finite concentration; Described absorption and desorption process are the processes of periodic duty; Described recycling step is realized by recovery system (III); In described absorption/desorption system (II), directly externally discharge with gas up to standard behind the sorbing material absorption organic solvent, the gas that contains organic solvent that the sorbing material of absorption finite concentration organic solvent produces after with described hypoxemia hot blast desorption enters recovery system (III), in recovery system (III) after the desuperheat heat-exchanger rig carries out the desuperheat heat exchange with cryogenic media to it, the part organic solvent is back to production, and a part of in addition organic solvent enters described hypoxemia hot blast generation systems (IV) and produces the hypoxemia hot blast; Described sorbing material with hypoxemia hot blast desorption after, enter next working cycles after cooling with the surrounding air after the filtration.
Described desuperheat heat-exchanger rig comprises organic solvent gas water-cooled desuperheat heat transmission equipment [6] and the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], after water carries out the desuperheat heat exchange in described organic solvent gas water-cooled desuperheat heat transmission equipment [6], the gas-liquid mixture of organic solvent and water enters the air-cooled desuperheat heat transmission equipment of organic solvent gas [10] and carries out the desuperheat heat exchange with the surrounding air after filtering, send into gas-liquid separation equipment [11] after the desuperheat heat exchange and carry out gas-liquid separation, the organic solvent gas that contains after separating is sent to hypoxemia hot blast generation systems (IV) participation generation hypoxemia hot blast, a part of separating the liquid that contains organic solvent after reclaiming is back to production, the liquid that an other part after separate reclaiming contains organic solvent is sent to hypoxemia hot blast generation equipment [15] according to the needs of hypoxemia hot blast generation equipment [15] catalytic combustion and replenishes certain amount of organic solvent, separates to separate water outlet in the liquid that contains organic solvent after reclaiming and send into organic solvent gas water-cooled desuperheat heat transmission equipment [6] as moisturizing; The contain organic solvent gas of a part of surrounding air after gas-liquid separation equipment [11] separation is sent to hypoxemia hot blast generation systems (IV) generation hypoxemia hot blast after carrying out the desuperheat heat exchange with the surrounding air after filtering in the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10], the external emptying of remainder contains organic solvent gas and does not contact mixing with surrounding air in the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10].
Described preliminary treatment is carried out in waste gas pretreatment system (I), waste gas pretreatment system (I) comprises gas sampling equipment [1], waste gas filtering equipment [2], blower fan [3] and EGT adjustment equipment [4], after the waste gas that contains one or more organic solvents that produces from production equipment [16] enters waste gas pretreatment system (I), at first collect and, send into EGT adjustment equipment [4] through blower fan [3] and carry out the temperature adjustment by after waste gas filtering equipment [2] filtration by gas sampling equipment [1].
A kind of treatment system of organic exhaust gas, comprise the waste gas pretreatment system (I) that links to each other with production equipment [16], absorption/desorption system (II), recovery system (III), robot control system(RCS) (V), the outlet of described waste gas pretreatment system (I) is connected with the import of absorption/desorption system (II), the outlet of described absorption/desorption system (II) is connected with the import of recovery system (III), described robot control system(RCS) (V) respectively with waste gas pretreatment system (I), absorption/desorption system (II), recovery system (III) connects, it is characterized in that: also comprise the hypoxemia hot blast generation systems (IV) that produces the hypoxemia hot blast, the import of described hypoxemia hot blast generation systems (IV) is connected with the outlet of recovery system (III), the outlet of hypoxemia hot blast generation systems (IV) is connected with the import of absorption/desorption system (II), and hypoxemia hot blast generation systems (IV) also is connected with robot control system(RCS) (V); Carry out the hypoxemia hot blast of the used medium of desorption for being produced by described hypoxemia hot blast generation systems (IV) in described absorption/desorption system (II), the fuel that the hypoxemia hot blast takes place described hypoxemia hot blast generation systems (IV) is the organic solvent that reclaims from recovery system (III).
Described hypoxemia hot blast generation systems (IV) comprises hypoxemia hot blast generation equipment [15] and heat exchanger [14], in the described hypoxemia hot blast generation equipment [15] catalyst is arranged, cold medium of lowering the temperature and the thermal medium that heats up are set in the described heat exchanger [14], and described cold medium is separately positioned on interior not the contacting in the device of mixing mutually of described heat exchanger [14] with thermal medium; The outlet of described heat exchanger [14] is connected with the import of hypoxemia hot blast generation equipment [15], the outlet of described hypoxemia hot blast generation equipment [15] is connected with the import of heat exchanger (14), hypoxemia hot blast generation equipment [15], heat exchanger [14] are connected with recovery system (III) respectively, and another outlet of described heat exchanger [14] is connected with the import of absorption/desorption system (II); Described absorption/desorption system (II) comprises absorption/desorption equipment [5], described absorption/desorption equipment [5] is case structure, in but the organic solvent adsorbent of desorption and regeneration function is arranged, on described absorption/desorption equipment (II) ambient air inlet and gas discharge outlet up to standard are set also, on the described ambient air inlet filter plant are set.
Described recovery system (III) comprises organic solvent gas water-cooled desuperheat heat transmission equipment [6], the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], gas-liquid separation equipment [11] and organic solvent reclaimer [9], the import of described organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the outlet of described absorption/desorption system (II), the outlet of described organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the import of the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], the outlet of the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10] is connected with the import of gas-liquid separation equipment [11], an outlet of described gas-liquid separation equipment [11] is connected with organic solvent reclaimer [9], another outlet is connected with heat exchanger [14] in the described hypoxemia hot blast generation systems (IV), between gas-liquid separation equipment [11] and the heat exchanger [14] blower fan [13] is set, described organic solvent gas water-cooled desuperheat heat transmission equipment [6] also is connected with water circulating apparatus [7], on the described organic solvent gas water-cooled desuperheat heat transmission equipment [6] direct-contact desuperheater is set also, described organic solvent reclaimer [9] is provided with machine solvent recovery mouth, described organic solvent reclaimer [9] also is connected with organic solvent feeder apparatus [8], described organic solvent feeder apparatus [8] also is connected with hypoxemia hot blast generation equipment [15], described organic solvent reclaimer [9] also is connected with water circulating apparatus [7], the emptying outlet of ambient air inlet and process blower fan [12] is set on the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10], and described blower fan [12] also is connected with blower fan [13]; On the described ambient air inlet filter plant is set.
Described waste gas pretreatment system (I) comprises gas sampling equipment [1], waste gas filtering equipment [2], blower fan [3] and EGT adjustment equipment [4], the import of described gas sampling equipment [1] links to each other with production equipment [16], outlet is connected with the import of waste gas filtering equipment [2], the outlet of described waste gas filtering equipment [2] is connected with the import that EGT is adjusted equipment [4], described waste gas filtering equipment [2] and EGT are adjusted between the equipment [4] blower fan [3] are set, and the outlet that described EGT is adjusted equipment [4] is connected with the import of absorption/desorption system (II).
Online oxygen concentration, temperature, flow monitoring equipment are set in the outlet of described hypoxemia hot blast generation systems (IV), and online oxygen concentration, temperature, flow monitoring equipment also link to each other with robot control system(RCS) (V).
Technique effect of the present invention is:
The organic solvent that the inventive method adopts hypoxemia hot blast desorption to reclaim can be back to production equipment [16], the organic solvent of Hui Shouing can offer hypoxemia hot blast generation systems (IV) and is used to take place the hypoxemia hot blast simultaneously, when guaranteeing the efficient desorption of organic solvent, solved the problem that other media such as steam or inert gas enter organic waste gas treatment system, also solved simultaneously the equipment corrosion problem that occurs when using the steam desorption, and make do not possess steam or inert gas occurrence condition enterprise can realize that also desorption reclaims organic solvent, and the hypoxemia hot blast that the generation desorption is used adopts the organic solvent that reclaims to act as a fuel, and need not to introduce other fuel and has prevented the internal system pollution problem of using xenogenesis fuel to be caused.
The present invention adopts absorption/desorption equipment to integrate absorption, desorption, and making can qualified discharge through the waste gas of this system handles, can make simultaneously behind the desorption organic solvent through separate reclaim after, organic solvent can drop into circulation and produce and use.
The isolated water of recovery system, water is sent to direct-contact desuperheater and is used for the desuperheat heat exchange through water circulating apparatus as a supplement, recycles, and does not have effluxing of water, has avoided the waste of secondary pollution and resource.
By the oxygen concentration of online oxygen concentration monitoring equipment and temperature, flow monitoring monitoring of equipment hypoxemia hot blast generation equipment exit hot blast and temperature, flow, with hot blast oxygen concentration and temperature, flow-control in claimed range, satisfying the desorption needs, and the safe operation of the system of assurance.
Can realize unattended automatic operating by robot control system(RCS) control entire equipment.
The present invention will adsorb/the intensive layout of equipment complex such as desorption equipment, hypoxemia hot blast generation equipment, gas-liquid separation equipment, water circulating apparatus, both solved the problem that other desorption modes require to use steam or inert gas, can reduce occupation area of equipment again, reduce operating cost.
Description of drawings
Fig. 1 is an organic waste gas treatment system structure connection layout of the present invention.
Reference numeral lists as follows:
The 16-production equipment;
I-waste gas pretreatment system: 1-gas sampling equipment, 2-waste gas filtering equipment, the 3-blower fan, the 4-EGT is adjusted equipment;
II-absorption/desorption system: 5-absorption/desorption equipment;
III-recovery system: 6-organic solvent gas water-cooled desuperheat heat transmission equipment, 7-water circulating apparatus, 8-organic solvent feeder apparatus, 9-organic solvent reclaimer, the air-cooled desuperheat heat transmission equipment of 10-organic solvent gas, 11-gas-liquid separation equipment, the 12-blower fan, the 13-blower fan;
IV-hypoxemia hot blast generation systems: 14-heat exchanger, 15-hypoxemia hot blast generation equipment;
The V-robot control system(RCS).
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further.Fig. 1 is an organic waste gas treatment system structure connection layout of the present invention.
The treatment system of organic exhaust gas of the present invention comprises waste gas pretreatment system (I), absorption/desorption system (II), hypoxemia hot blast generation systems (IV), recovery system (III), robot control system(RCS) (V).The import of waste gas pretreatment system (I) links to each other with production equipment [16], the outlet of waste gas pretreatment system (I) is connected with the import of absorption/desorption system (II), the outlet of absorption/desorption system (II) is connected with the import of recovery system (III), the outlet of recovery system (III) is connected with the import of hypoxemia hot blast generation systems (IV), the outlet of hypoxemia hot blast generation systems (IV) is connected with absorption/desorption system (II), robot control system(RCS) (V) respectively with waste gas pretreatment system (I), absorption/desorption system (II), recovery system (III), hypoxemia hot blast generation systems (IV) connects.
Waste gas pretreatment system (I) comprises gas sampling equipment [1], waste gas filtering equipment [2], blower fan [3] and EGT adjustment equipment [4], the import of gas sampling equipment [1] links to each other with production equipment, outlet is connected with the import of waste gas filtering equipment [2], the outlet of waste gas filtering equipment [2] is adjusted equipment [4] with EGT and is connected, and waste gas filtering equipment [2] and EGT are adjusted between the equipment [4] blower fan [3] is set.
Absorption/desorption system (II) comprises absorption/desorption equipment [5], absorption/desorption equipment [5] is case structure, in adsorbent is arranged, ambient air inlet and gas discharge outlet up to standard also are set on the absorption/desorption equipment (II), filter plant is set on the ambient air inlet, and adsorbent can adopt active carbon.
Hypoxemia hot blast generation systems (IV) comprises hypoxemia hot blast generation equipment [15] and heat exchanger [14], in the hypoxemia hot blast generation equipment [15] catalyst is arranged, cold medium of lowering the temperature and the thermal medium that heats up are set in the heat exchanger [14], and described cold medium is separately positioned on interior not the contacting in the device of mixing mutually of described heat exchanger [14] with thermal medium; An outlet of heat exchanger [14] is connected with the import of hypoxemia hot blast generation equipment [15], the outlet of hypoxemia hot blast generation equipment [15] is connected with the high temperature import of heat exchanger (14), the low temperature import of hypoxemia hot blast generation equipment [15], heat exchanger [14] is connected with recovery system (III), and another outlet of heat exchanger [14] is connected with absorption/desorption system (II).
Recovery system (III) comprises organic solvent gas water-cooled desuperheat heat transmission equipment [6], the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], gas-liquid separation equipment [11] and organic solvent reclaimer [9], the import of organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the outlet of described absorption/desorption system (II), the outlet of organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the import of the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], the outlet of the air-cooled desuperheat heat transmission equipment of organic solvent gas [10] is connected with the import of gas-liquid separation equipment [11], an outlet of gas-liquid separation equipment [11] is connected with organic solvent reclaimer [9], another outlet is connected with heat exchanger [14] in the described hypoxemia hot blast generation systems (IV), between gas-liquid separation equipment [11] and the heat exchanger [14] blower fan [13] is set; Organic solvent gas water-cooled desuperheat heat transmission equipment [6] also is connected with water circulating apparatus [7], on the described organic solvent gas water-cooled desuperheat heat transmission equipment [6] direct-contact desuperheater is set also, organic solvent reclaimer [9] is provided with machine solvent recovery mouth, organic solvent reclaimer [9] also is connected with organic solvent feeder apparatus [8], organic solvent feeder apparatus [8] also is connected with hypoxemia hot blast generation equipment [15], organic solvent reclaimer [9] also is connected with water circulating apparatus [7], the emptying outlet of surrounding air air inlet and process blower fan [12] is set on the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], filter plant is set on the ambient air inlet, and blower fan [12] also is connected with blower fan [13].
One or more organic solvent waste gas that contain that produce in the production equipment [16] (contain organic solvent waste gas and produce equipment) are handled through waste gas pretreatment system (I) earlier, be after gas sampling equipment [1] is collected and filtered by waste gas filtering equipment [2], send into EGT through blower fan [3] and adjust the temperature that equipment [4] reduces waste gas, so that in down-stream, adsorb organic solvent better; Enter absorption/desorption system (II) after adjusting temperature, promptly in the absorption/desorption equipment [5], by the organic solvent in the adsorbents adsorb waste gas in the absorption/desorption equipment [5], the hypoxemia hot blast that has adsorbed adsorbent introducing hypoxemia hot blast generation systems (IV) generation of organic solvent carries out desorption, behind the adsorbent desorption organic solvent, after introducing the surrounding air cooling of filtering the back from the outside, proceed next working cycles, above-mentioned absorption and desorption process are the processes of periodic duty.
The mist that contains organic solvent that produces behind the adsorbent desorption organic solvent enters recovery system (III), at first enter organic solvent gas water-cooled desuperheat heat transmission equipment [6] cold water desuperheat heat exchange, used cold water is provided by water circulating apparatus [7] and carries out the desuperheat heat exchange by direct-contact desuperheater.The gas-liquid mixture of organic solvent and water enters the air-cooled desuperheat heat transmission equipment of organic solvent gas [10] after organic solvent gas water-cooled desuperheat heat transmission equipment [6] is with the heat exchange of cold water desuperheat, introduce gas-liquid mixture that the surrounding air (surrounding air does not contact, mixes with the mist that contains organic solvent) that filters the back carries out will containing after the desuperheat heat exchange organic solvent from the outside and send into gas-liquid separation equipment [11] and separate, the heat exchanger [14] of the organic solvent gas after the separation being sent into hypoxemia hot blast generation systems (IV) is used to produce the hypoxemia hot blast.The liquid that contains organic solvent after separating in the above-mentioned gas-liquid separation equipment [11] enters organic solvent reclaimer [9], the part of the liquid that contains organic solvent in organic solvent reclaimer [9] reclaims a mouthful recovery from organic solvent and is used for producing, another part need enter organic solvent feeder apparatus [8] the required organic solvent of hypoxemia hot blast generation systems (IV) as a supplement according to (IV) of hypoxemia hot blast generation systems, when hypoxemia hot blast generation equipment [15] catalytic combustion organic solvent obtains the hypoxemia hot blast, if organic solvent can replenish organic solvent from organic solvent feeder apparatus [8] inadequately.The fluid separation applications water outlet that contains organic solvent in the organic solvent reclaimer [9] is sent to water circulating apparatus [7] as moisturizing by water pump.The surrounding air that the air-cooled desuperheat heat transmission equipment of above-mentioned organic solvent gas [10] is introduced the outside also carries out the desuperheat heat exchange after the filtration, portion of air is sent to contain the heat exchanger [14] that organic solvent gas send in hypoxemia hot blast generation systems (IV) of blower fan [13] after gas-liquid separation equipment [11] separates by blower fan [12] and is used to produce the hypoxemia hot blast after the desuperheat heat exchange, unnecessary part air through blower fan [12] after emptying outward.Air-cooled desuperheat heat transmission equipment of organic solvent gas [10] and organic solvent gas water-cooled desuperheat heat transmission equipment [6] and water circulating apparatus [7] are according to reclaiming arts demand, and be interchangeable on technological process is arranged, but blower fan [12] still is connected with desuperheat heat transmission equipment [10].
The above-mentioned mixture that contains organic solvent gas and surrounding air of sending into heat exchanger [14] enters hypoxemia hot blast generation equipment [15] after heat exchanger [14] is heated up by the thermal medium in the heat exchanger [14], the organic solvent that enters hypoxemia hot blast generation equipment [15] produces the hypoxemia hot blast by the burning of the catalyst in the hypoxemia hot blast generation equipment [15], the hypoxemia hot blast that produces enters the absorption/desorption equipment [5] that enters after heat exchanger [14] is lowered the temperature by the cold medium in the heat exchanger [14] in absorption/desorption system (II) once more, for the organic solvent in the adsorbent carries out desorption.Heat up on the heat exchanger [14] and carry out with different cold media or thermal medium in the different passages of heat exchanger [14] respectively with cooling step, temperature-rise period does not contact mixing mutually with temperature-fall period.
Online oxygen concentration monitoring equipment is set in the outlet of hypoxemia hot blast generation systems (IV), oxygen concentration by online oxygen concentration monitoring equipment monitoring hypoxemia hot blast generation systems (IV) exit hot blast, the hot blast oxygen concentration is controlled in the claimed range, satisfying the catalytic combustion needs, and the safe operation of the system of assurance.Online oxygen concentration monitoring equipment links to each other with robot control system(RCS) (V), can control the oxygen amount that enters hypoxemia hot blast generation systems (IV) by robot control system(RCS) (V).
The outlet of hypoxemia hot blast generation systems (IV) can also be provided with the temperature of on-line measurement hypoxemia hot blast and the monitor of flow as required.With hot blast oxygen temperature, flow-control in claimed range, satisfying the catalytic combustion needs, and the safe operation of the system of assurance.Online temperature, flow monitoring equipment link to each other with robot control system(RCS) (V), can enter temperature, the flow of hypoxemia hot blast generation systems (IV) by robot control system(RCS) (V) control.
By robot control system(RCS) (V) control waste gas pretreatment system (I), absorption/desorption system (II), hypoxemia hot blast generation systems (IV), recovery system (III), according to the sequential working that requires of production equipment [16].
The invention provides a kind of processing method and system thereof of organic exhaust gas, the waste gas that contains one or more organic solvents that from production equipment, produces, earlier entering absorption/desorption system (II) after waste gas pretreatment system (I) carries out preliminary treatment adsorbs and desorption, organic solvent behind the desorption enters recovery system (III) and recycles, a part is used for producing to be used, another part is used to carry out catalytic combustion and obtains the hypoxemia hot blast, in absorption/desorption (II) system, the hypoxemia hot blast that produces with hypoxemia hot blast generation systems (IV) behind one or more organic solvents of adsorbents adsorb carries out desorption, and the organic solvent that the hypoxemia hot blast takes place only needs recovery system (III) to reclaim acts as a fuel, the feasible enterprise that does not possess steam or inert gas supply, also can possess the condition that organic solvent waste gas reclaims, and when guaranteeing the non-secondary pollution discharging, also solved simultaneously and used the internal system pollution problem that xenogenesis fuel caused and solved the problems such as equipment corrosion of using steam to cause.
Claims (10)
1. the processing method of an organic exhaust gas, to carry out adsorbing successively after the preliminary treatment from the waste gas that contains one or more organic solvents that production equipment [16] produces, desorption, recovery, it is characterized in that: the part of the organic solvent that reclaims behind the described recycling step is used for producing uses, another part is used to carry out catalytic combustion and obtains the hypoxemia hot blast; In described desorption, the hypoxemia hot blast that obtains with described catalytic combustion carries out desorption.
2. the processing method of organic exhaust gas according to claim 1, it is characterized in that: described catalytic combustion carries out in hypoxemia hot blast generation systems (IV), described hypoxemia hot blast generation systems (IV) comprises hypoxemia hot blast generation equipment [15] and heat exchanger [14], in the hypoxemia hot blast generation equipment [15] catalyst is arranged; With the certain amount of organic solvent that reclaims with rise to uniform temperature through heat exchanger [14] after surrounding air mix after, enter hypoxemia hot blast generation equipment [15] and produce the hypoxemia hot blast by the catalyst burning, the hypoxemia hot blast that produces enters and is used for desorption after heat exchanger [14] is reduced to uniform temperature, and described heat exchanger [14] heats up and carries out in the different passages of heat exchanger [14] respectively with cooling step.
3. the processing method of organic exhaust gas according to claim 2, it is characterized in that: described absorption and desorption are finished a cover system has the absorption/desorption system (II) of sorbing material promptly in, sorbing material in the absorption/desorption system (II) to finite concentration, carries out the desorption organic solvent at the absorption organic solvent; Described absorption and desorption process are the processes of periodic duty; Described recycling step is realized by recovery system (III); In described absorption/desorption system (II), directly externally discharge with gas up to standard behind the sorbing material absorption organic solvent, the gas that contains organic solvent that the sorbing material of absorption finite concentration organic solvent produces after with described hypoxemia hot blast desorption enters recovery system (III), in recovery system (III) after the desuperheat heat-exchanger rig carries out the desuperheat heat exchange with cryogenic media to it, the part organic solvent is back to production, and a part of in addition organic solvent enters described hypoxemia hot blast generation systems (IV) and produces the hypoxemia hot blast; Described sorbing material with hypoxemia hot blast desorption after, enter next working cycles after cooling with the surrounding air after the filtration.
4. the processing method of organic exhaust gas according to claim 3, it is characterized in that: described desuperheat heat-exchanger rig comprises organic solvent gas water-cooled desuperheat heat transmission equipment [6] and the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], after water carries out the desuperheat heat exchange in described organic solvent gas water-cooled desuperheat heat transmission equipment [6], the gas-liquid mixture of organic solvent and water enters the air-cooled desuperheat heat transmission equipment of organic solvent gas [10] and carries out the desuperheat heat exchange with the surrounding air after filtering, send into gas-liquid separation equipment [11] after the desuperheat heat exchange and carry out gas-liquid separation, the organic solvent gas that contains after separating is sent to hypoxemia hot blast generation systems (IV) participation generation hypoxemia hot blast, a part of separating the liquid that contains organic solvent after reclaiming is back to production, the liquid that an other part after separate reclaiming contains organic solvent is sent to hypoxemia hot blast generation equipment [15] according to the needs of hypoxemia hot blast generation equipment [15] catalytic combustion and replenishes certain amount of organic solvent, separates to separate water outlet in the liquid that contains organic solvent after reclaiming and send into organic solvent gas water-cooled desuperheat heat transmission equipment [6] as moisturizing; The contain organic solvent gas of a part of surrounding air after gas-liquid separation equipment [11] separation is sent to hypoxemia hot blast generation systems (IV) generation hypoxemia hot blast after carrying out the desuperheat heat exchange with the surrounding air after filtering in the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10], the external emptying of remainder contains organic solvent gas and does not contact mixing with surrounding air in the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10].
5. the processing method of organic exhaust gas according to claim 1, it is characterized in that: described preliminary treatment is carried out in waste gas pretreatment system (I), waste gas pretreatment system (I) comprises gas sampling equipment [1], waste gas filtering equipment [2], blower fan [3] and EGT adjustment equipment [4], after the waste gas that contains one or more organic solvents that produces from production equipment [16] enters waste gas pretreatment system (I), at first collect and, send into EGT adjustment equipment [4] through blower fan [3] and carry out the temperature adjustment by after waste gas filtering equipment [2] filtration by gas sampling equipment [1].
6. the treatment system of an organic exhaust gas, comprise the waste gas pretreatment system (I) that links to each other with production equipment [16], absorption/desorption system (II), recovery system (III), robot control system(RCS) (V), the outlet of described waste gas pretreatment system (I) is connected with the import of absorption/desorption system (II), the outlet of described absorption/desorption system (II) is connected with the import of recovery system (III), described robot control system(RCS) (V) respectively with waste gas pretreatment system (I), absorption/desorption system (II), recovery system (III) connects, it is characterized in that: also comprise the hypoxemia hot blast generation systems (IV) that produces the hypoxemia hot blast, the import of described hypoxemia hot blast generation systems (IV) is connected with the outlet of recovery system (III), the outlet of hypoxemia hot blast generation systems (IV) is connected with the import of absorption/desorption system (II), and hypoxemia hot blast generation systems (IV) also is connected with robot control system(RCS) (V); Carry out the hypoxemia hot blast of the used medium of desorption for being produced by described hypoxemia hot blast generation systems (IV) in described absorption/desorption system (II), the fuel that the hypoxemia hot blast takes place described hypoxemia hot blast generation systems (IV) is the organic solvent that reclaims from recovery system (III).
7. the treatment system of organic exhaust gas according to claim 6, it is characterized in that: described hypoxemia hot blast generation systems (IV) comprises hypoxemia hot blast generation equipment [15] and heat exchanger [14], in the described hypoxemia hot blast generation equipment [15] catalyst is arranged, cold medium of lowering the temperature and the thermal medium that heats up are set in the described heat exchanger [14], and described cold medium is separately positioned on interior not the contacting in the device of mixing mutually of described heat exchanger [14] with thermal medium; The outlet of described heat exchanger [14] is connected with the import of hypoxemia hot blast generation equipment [15], the outlet of described hypoxemia hot blast generation equipment [15] is connected with the import of heat exchanger (14), hypoxemia hot blast generation equipment [15], heat exchanger [14] are connected with recovery system (III) respectively, and another outlet of described heat exchanger [14] is connected with the import of absorption/desorption system (II); Described absorption/desorption system (II) comprises absorption/desorption equipment [5], described absorption/desorption equipment [5] is case structure, in but the organic solvent adsorbent of desorption and regeneration function is arranged, on described absorption/desorption equipment (II) ambient air inlet and gas discharge outlet up to standard are set also, on the described ambient air inlet filter plant are set.
8. the treatment system of organic exhaust gas according to claim 7, it is characterized in that: described recovery system (III) comprises organic solvent gas water-cooled desuperheat heat transmission equipment [6], the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], gas-liquid separation equipment [11] and organic solvent reclaimer [9], the import of described organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the outlet of described absorption/desorption system (II), the outlet of described organic solvent gas water-cooled desuperheat heat transmission equipment [6] is connected with the import of the air-cooled desuperheat heat transmission equipment of organic solvent gas [10], the outlet of the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10] is connected with the import of gas-liquid separation equipment [11], an outlet of described gas-liquid separation equipment [11] is connected with organic solvent reclaimer [9], another outlet is connected with heat exchanger [14] in the described hypoxemia hot blast generation systems (IV), between gas-liquid separation equipment [11] and the heat exchanger [14] blower fan [13] is set, described organic solvent gas water-cooled desuperheat heat transmission equipment [6] also is connected with water circulating apparatus [7], on the described organic solvent gas water-cooled desuperheat heat transmission equipment [6] direct-contact desuperheater is set also, described organic solvent reclaimer [9] is provided with machine solvent recovery mouth, described organic solvent reclaimer [9] also is connected with organic solvent feeder apparatus [8], described organic solvent feeder apparatus [8] also is connected with hypoxemia hot blast generation equipment [15], described organic solvent reclaimer [9] also is connected with water circulating apparatus [7], the emptying outlet of ambient air inlet and process blower fan [12] is set on the air-cooled desuperheat heat transmission equipment of described organic solvent gas [10], and described blower fan [12] also is connected with blower fan [13]; On the described ambient air inlet filter plant is set.
9. according to the treatment system of claim 6 or 7 or 8 described organic exhaust gas, it is characterized in that: described waste gas pretreatment system (I) comprises gas sampling equipment [1], waste gas filtering equipment [2], blower fan [3] and EGT are adjusted equipment [4], the import of described gas sampling equipment [1] links to each other with production equipment [16], outlet is connected with the import of waste gas filtering equipment [2], the outlet of described waste gas filtering equipment [2] is connected with the import that EGT is adjusted equipment [4], described waste gas filtering equipment [2] and EGT are adjusted between the equipment [4] blower fan [3] are set, and the outlet that described EGT is adjusted equipment [4] is connected with the import of absorption/desorption system (II).
10. according to the treatment system of the described organic exhaust gas of one of claim 6 to 9, it is characterized in that: online oxygen concentration, temperature, flow monitoring equipment are set in the outlet of described hypoxemia hot blast generation systems (IV), and online oxygen concentration, temperature, flow monitoring equipment also link to each other with robot control system(RCS) (V).
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