CN113274843A - Device for dispersed collection and centralized treatment of VOCs waste gas and treatment method thereof - Google Patents
Device for dispersed collection and centralized treatment of VOCs waste gas and treatment method thereof Download PDFInfo
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- CN113274843A CN113274843A CN202110538971.1A CN202110538971A CN113274843A CN 113274843 A CN113274843 A CN 113274843A CN 202110538971 A CN202110538971 A CN 202110538971A CN 113274843 A CN113274843 A CN 113274843A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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Abstract
The invention provides a device for dispersedly collecting and intensively treating VOCs waste gas and a treatment method thereof, the device comprises a desorption device, a mixer and an SCR reactor which are sequentially arranged according to the flow direction of the waste gas, the inlets of the desorption device and the mixer are connected with a plurality of dilution cooling fans for diluting and cooling the waste gas, an SCR catalyst is arranged in the SCR reactor, the device also comprises a boiler and an economizer, the outlet of the economizer is connected with the inlet flue of the SCR reactor, the inlet of the economizer is connected with the outlet flue of the boiler, the mixed gas desorbed by the desorption device is diluted in the mixer and mixed with the flue gas from the outlet flue of the boiler, and the mixed gas is sprayed into the inlet flue of the SCR reactor to participate in SCR denitration reaction. The method can collect and intensively treat the VOCs waste gas in relatively concentrated industrial parks, solve the problem of VOCs waste gas emission, reduce the ammonia injection amount of the SCR device and reduce the operation cost.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of volatile organic compound waste gas treatment, in particular to a device for dispersedly collecting and intensively treating VOCs waste gas and a treatment method thereof.
[ background of the invention ]
VOCs discharges the point source and has a few, wide face, the little characteristics of monomer volume, in some industry centralized industrial park, often has a large amount of dispersed VOCs waste gas control points. Due to the diversification of treatment processes, treatment equipment and operation management levels are different, and supervision is difficult.
The conventional activated carbon adsorption catalytic combustion method has relatively low desorption temperature, low activated carbon desorption efficiency and high organic matter residue, and seriously influences the service life of the activated carbon. The catalytic combustion temperature fluctuation is large, the phenomenon that the concentration of an outlet exceeds the standard due to insufficient combustion can occur, and the catalyst has the risk of being polluted. RTO equipment one-time investment is high, has certain restriction to the concentration of entry waste gas, and the running cost is also higher, has certain safe risk, still can produce NOx and cause secondary pollution. A device for dispersedly collecting and intensively treating VOCs waste gas and a treatment method thereof are provided.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a device for dispersedly collecting and intensively treating VOCs waste gas and a treatment method thereof, which can collect and intensively treat VOCs waste gas in relatively more concentrated industrial parks and solve the problem of VOCs waste gas emission.
In order to achieve the purpose, the invention provides a device for dispersedly collecting and intensively treating VOCs waste gas, which comprises a desorption device, a mixer and an SCR reactor which are sequentially arranged according to the flow direction of the waste gas, wherein inlets of the desorption device and the mixer are connected with a plurality of dilution cooling fans for diluting and cooling the waste gas, an SCR catalyst is arranged in the SCR reactor, the device also comprises a boiler and an economizer, an outlet of the economizer is connected with an inlet flue of the SCR reactor, an inlet of the economizer is connected with an outlet flue of the boiler, mixed gas desorbed by the desorption device is diluted in the mixer and mixed with flue gas from the outlet flue of the boiler, and the mixed gas is sprayed into the inlet flue of the SCR reactor to participate in SCR denitration reaction after being mixed.
Preferably, the desorption device adopts high-temperature steam for desorption.
As preferred, every dilutes the entry of cooling blower and is connected with particulate filter respectively, avoids the dust granule to get into desorption apparatus, blocks up the adsorbent. Dilute cooling fan and dilute usefulness as VOCs waste gas when adsorbing, use as cooling adsorbent when desorption apparatus cools off.
Preferably, the inlet of the desorption device is further connected with a desorption adjusting valve.
Preferably, the device further comprises a main air duct, a first air duct branch and a second air duct branch, an inlet of the main air duct is connected with a plurality of dilution cooling fans, outlets of the main air duct and the second air duct are respectively connected with inlets of the desorption device and the mixer through the first air duct branch and the second air duct branch, the first air duct branch and the second air duct branch are respectively provided with a cooling air shutoff valve and a dilution air shutoff valve, and the operation is switched through the cooling air shutoff valve and the dilution air shutoff valve.
The invention also provides a treatment method of the device for dispersedly collecting and intensively treating the VOCs waste gas, which sequentially comprises the following steps:
s1, carrying out dispersed collection on VOCs waste gas generation points by adopting a movable adsorption tank, and then conveying the VOCs waste gas to a centralized processing center provided with a device for dispersed collection and centralized treatment of VOCs waste gas;
s2, inputting VOCs waste gas collected by the movable adsorption tank into a desorption device, and desorbing through high-temperature hot steam;
s3, taking the mixed gas desorbed in the step S2 as a reducing agent for SCR denitration, diluting the mixed gas with air in a mixer to a safe concentration range, and directly spraying the diluted VOCs waste gas into an inlet flue of the SCR reactor;
and S4, fully mixing the diluted VOCs waste gas with the flue gas from the boiler, and then carrying out catalytic reduction reaction under the action of an SCR catalyst to finally oxidize the waste gas into carbon dioxide and water.
Preferably, in step S1, a modular mobile adsorption tank is used to perform adsorption collection on the VOCs waste gas generation points, the mobile adsorption tank 11 is set for standby, the mobile adsorption tank after adsorption saturation is transported to a centralized processing center by a special transportation vehicle, and the adsorption operation is continued by switching to the standby mobile adsorption tank for on-site adsorption.
The invention has the beneficial effects that:
1. adopt the mode of professional entrust to disperse to collect centralized processing, VOCs waste gas produces the unit and only carries out the on-the-spot absorption and collects, and the security is high, and operation and management are convenient, and the efficient handling is carried out after the centralized processing center high temperature desorption, and the treatment effect is good, and disposable investment is low, and the running cost is low.
2. The centralized processing center adopts high-temperature steam for desorption, the desorption efficiency is high, the adsorbent residue is less, and the service life of the adsorbent is greatly prolonged.
3. The desorbed VOCs waste gas is directly sprayed into the inlet of the SCR reactor to be used as a reducing agent for denitration reaction, so that the purpose of treating waste by waste is achieved, and the using amount of ammonia is reduced.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic view of a device for decentralized collection and centralized treatment of VOCs waste gas according to the present invention;
description of reference numerals:
the method comprises the following steps of 1-desorption device, 2-mixer, 3-SCR reactor, 31-SCR catalyst, 4-boiler, 5-economizer, 6-dilution cooling fan, 61-total air duct, 62-first air duct branch, 63-second air duct branch, 7-particulate matter filter, 8-cooling air shutoff valve and 9-dilution air shutoff valve.
[ detailed description ] embodiments
According to the invention, the adsorption device is arranged at each waste gas discharge point of a relatively centralized industrial park in the industry, so that the discharged VOCs are adsorbed, then the VOCs are transported to the centralized treatment center for centralized treatment, high-temperature steam is adopted for desorption, and the desorbed VOCs mixed gas is directly sprayed into the flue at the inlet of the SCR reactor for denitration reaction, thereby achieving the purpose of treating waste by waste. The specific implementation mode is as follows:
referring to fig. 1, the device for dispersedly collecting and centrally treating the waste gas containing VOCs of the invention comprises a desorption device 1, a mixer 2 and an SCR reactor 3 which are arranged in sequence according to the flow direction of the waste gas, the inlets of the desorption device 1 and the mixer 2 are connected with a plurality of dilution cooling fans 6 for diluting and cooling the waste gas, the desorption device 1 adopts high-temperature steam or hot nitrogen gas for desorption, the inlet of the desorption device 1 is also connected with a desorption regulating valve 10, an SCR catalyst 31 is arranged in the SCR reactor 3, the device also comprises a boiler 4 and an economizer 5, wherein the outlet of the economizer 5 is connected with the inlet flue of the SCR reactor 3, the inlet of the economizer 5 is connected with the outlet flue of the boiler 4, the mixed gas desorbed by the desorption device 1 is diluted in the mixer 2, and is mixed with the flue gas from the outlet flue of the boiler 4, and the mixed gas is sprayed into the inlet flue of the SCR reactor 3 to participate in the SCR denitration reaction.
Further, the inlet of each dilution cooling fan 6 is connected with a particulate filter 7 respectively, so that dust particles are prevented from entering the desorption device 1 and blocking the adsorbent. Dilute the waste gas dilution usefulness as VOCs when diluting cooling blower 6 and adsorbing, use as cooling adsorbent when desorption apparatus 1 cools down.
Further, still include total wind channel 61, first wind channel branch 62, second wind channel branch 63, a plurality of dilution cooling fan 6 of entry linkage in total wind channel 61, export respectively through the entry linkage of first wind channel branch 62, second wind channel branch 63 with desorption apparatus 1, blender 2, install cooling wind shut-off valve 8 and dilution wind shut-off valve 9 on first wind channel branch 62, the second wind channel branch 63 respectively, switch the operation through cooling wind shut-off valve 8 and dilution wind shut-off valve 9.
The invention relates to a treatment method of a device for dispersedly collecting and intensively treating VOCs waste gas, which sequentially comprises the following steps:
s1, adsorbing and collecting VOCs waste gas generation points by adopting a modularized movable adsorption tank 11, arranging the movable adsorption tank 11 for later use, transporting the movable adsorption tank 11 after adsorption saturation to a centralized processing center with a device for dispersedly collecting and intensively treating VOCs waste gas through a special transport vehicle, and switching field adsorption to the standby movable adsorption tank 11 to continue adsorption operation;
s2, inputting VOCs waste gas collected by the movable adsorption tank 11 into a desorption device 1, and desorbing through high-temperature hot steam;
s3, taking the mixed gas desorbed in the step S2 as a reducing agent for SCR denitration, diluting the mixed gas with air in the mixer 2 to a safe concentration range, and directly spraying the diluted VOCs waste gas into an inlet flue of the SCR reactor 3;
and S4, fully mixing the diluted VOCs waste gas with the flue gas from the boiler 4, and then carrying out catalytic reduction reaction under the action of the SCR catalyst 31 to finally oxidize the waste gas into carbon dioxide and water.
Further, the movable adsorption tank 11 after adsorption saturation is sealed before transportation, so that the leakage of the VOCs waste gas is prevented.
Further, the centralized processing center is generally located near the coal-fired power plant and is provided with high-temperature hot steam and an SCR denitration device. The movable adsorption tank 11 transported to the centralized processing center is desorbed by high-temperature hot steam, and the desorbed mixed gas is used as a reducing agent for SCR denitration. For safety, the desorbed mixed gas is diluted by air in the mixer 2 to a safe concentration range, the dilution air is provided by the dilution cooling fan 6, the diluted VOCs are directly sprayed into the flue at the inlet of the SCR reactor 3, and are fully mixed with the flue gas to perform catalytic reduction reaction under the action of an SCR catalyst, and finally are oxidized into carbon dioxide and water, so that the purpose of removing pollutants is achieved.
Further, after the desorption of the movable adsorption tank 11 is completed, the adsorbent is cooled by clean air, air for cooling is provided by the dilution cooling fan 6, in order to prevent dust particles from blocking the adsorbent, a particle filter 7 is arranged at the inlet of the dilution cooling fan 6 to remove particles in the air, and a cooling air shutoff valve 8 and a dilution air shutoff valve 9 are arranged at the outlet of the dilution cooling fan 6 to control the feeding of cooling air and dilution air.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (7)
1. The utility model provides a device of concentrated treatment VOCs waste gas is collected in dispersion which characterized in that: the device includes desorption device (1), mixer (2), SCR reactor (3) that set gradually according to the waste gas flow direction, the entry linkage of desorption device (1), mixer (2) has a plurality of dilution cooling fan (6) that are used for diluting the cooling exhaust gas, be equipped with SCR catalyst (31) in SCR reactor (3), the device still includes boiler (4) and economizer (5), the entry flue of exit linkage SCR reactor (3) of economizer (5), the exit flue of entry linkage boiler (4) of economizer (5), the mist after desorption device (1) desorption dilutes in mixer (2) to mix with the flue gas that comes from boiler (4) exit flue, spout the entry flue that SCR reactor (3) after mixing and participate in the SCR denitration reaction.
2. The apparatus according to claim 1, wherein the apparatus for decentralized collection and centralized treatment of waste gases containing VOCs comprises: the desorption device (1) adopts high-temperature steam for desorption.
3. The apparatus according to claim 1, wherein the apparatus for decentralized collection and centralized treatment of waste gases containing VOCs comprises: the inlet of each dilution cooling fan (6) is respectively connected with a particulate filter (7).
4. The apparatus according to claim 1, wherein the apparatus for decentralized collection and centralized treatment of waste gases containing VOCs comprises: the inlet of the desorption device (1) is also connected with a desorption regulating valve (10).
5. The apparatus according to claim 1, wherein the apparatus for decentralized collection and centralized treatment of waste gases containing VOCs comprises: still include total wind channel (61), first wind channel branch (62), second wind channel branch (63), a plurality of diluting cooling fan (6) of entry linkage in total wind channel (61), export respectively through the entry linkage of first wind channel branch (62), second wind channel branch (63) with desorption apparatus (1), blender (2), install cooling air shut-off valve (8) and diluting air shut-off valve (9) on first wind channel branch (62), the second wind channel branch (63) respectively.
6. A method for treating waste gas containing VOCs by decentralized collection and centralized treatment according to any one of claims 1 to 5, characterized in that: the method sequentially comprises the following steps:
s1, carrying out dispersed collection on VOCs waste gas generation points by adopting a movable adsorption tank (11), and then conveying to a centralized treatment center provided with a device for dispersed collection and centralized treatment of VOCs waste gas;
s2, inputting VOCs waste gas collected by the movable adsorption tank (11) into a desorption device (1) and desorbing through high-temperature hot steam;
s3, taking the mixed gas desorbed in the step S2 as a reducing agent for SCR denitration, diluting the mixed gas with air in a mixer (2) to a safe concentration range, and directly spraying the diluted VOCs waste gas into an inlet flue of the SCR reactor (3);
s4, fully mixing the diluted VOCs waste gas with the flue gas from the boiler (4), and then carrying out catalytic reduction reaction under the action of an SCR catalyst (31) to finally oxidize the waste gas into carbon dioxide and water.
7. The treatment method of the device for the distributed collection and centralized treatment of the VOCs waste gas according to claim 6, characterized in that: in the step S1, a modularized movable adsorption tank (11) is adopted to adsorb and collect VOCs waste gas generation points, the movable adsorption tank 11 is arranged for standby, the movable adsorption tank (11) after adsorption saturation is transported to a centralized processing center, and the movable adsorption tank (11) for standby is switched to on-site adsorption to continue adsorption operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110538971.1A CN113274843A (en) | 2021-05-18 | 2021-05-18 | Device for dispersed collection and centralized treatment of VOCs waste gas and treatment method thereof |
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| CN202110538971.1A CN113274843A (en) | 2021-05-18 | 2021-05-18 | Device for dispersed collection and centralized treatment of VOCs waste gas and treatment method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155438A (en) * | 2022-08-16 | 2022-10-11 | 国网安徽省电力有限公司电力科学研究院 | Lithium ion battery thermal runaway gas processing apparatus |
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2021
- 2021-05-18 CN CN202110538971.1A patent/CN113274843A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115155438A (en) * | 2022-08-16 | 2022-10-11 | 国网安徽省电力有限公司电力科学研究院 | Lithium ion battery thermal runaway gas processing apparatus |
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