CN105833677A - Method and equipment for treating volatile organic compounds by low-temperature plasma coupling adsorption - Google Patents
Method and equipment for treating volatile organic compounds by low-temperature plasma coupling adsorption Download PDFInfo
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- CN105833677A CN105833677A CN201610242417.8A CN201610242417A CN105833677A CN 105833677 A CN105833677 A CN 105833677A CN 201610242417 A CN201610242417 A CN 201610242417A CN 105833677 A CN105833677 A CN 105833677A
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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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
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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
- B01D53/38—Removing components of undefined structure
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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
- B01D53/73—After-treatment of removed 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
- B01D53/81—Solid phase processes
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Abstract
The invention provides equipment and a method for treating volatile organic compounds by low-temperature plasma coupling adsorption, wherein a low-temperature plasma process and an adsorbing process are adopted, and volatile organic waste gas and odor gas are firstly treated by a low-temperature plasma device, and then enter an adsorbing device to be treated. When a low-temperature plasma coupling adsorption method is applied to treat organic waste gas and odor waste gas with non-methane hydrocarbon lower than 6000 ppm and sulfuretted hydrogen lower than 100 ppm, benzene in exhaust is lower than 4mg/m<3> and various odorous substances completely reach the standards in comparison with a mode of purely using an adsorbing method or purely using low-temperature plasmas; and the filling amount of an ozone disintegrant can be reduced by more than 50% and the regeneration period is prolonged by one time and more in comparison with a mode of independently using low-temperature plasmas.
Description
Technical field
The present invention relates to technical field of waste gas treatment, particularly relate to a kind of low temperature plasma Coupling Adsorption and process volatile organic matter and the method for foul gas.
Background technology
Petroleum refining is one of key industry producing odor pollution, the foul gas produced due to Petrochemical Enterprises production process not only contains the odor pollutions such as hydrogen sulfide, mercaptan, thioether, ammonia, simultaneously possibly together with a large amount of oil gas and organic pollution, the technological reaction of its complexity, can produce the most offensive, sensitive to people odorant.Wherein, what harm was bigger has inorganic and organic sulfur compound, ammonia and organic amine, aromatic hydrocarbons, phenols and organic acid etc..At present, odor polluting source has device waste gas, tank field breather valve release gas and sewage farm uncontrollable discharge gas.
In recent years, along with stepping up that citizen's environmental protection and worker health are realized, the pollutant starting to discharge device waste gas and Waste Water Treatment gas are administered, to solve the problem that odor pollution disturbs residents.On-the-spot conventional the methods of odour control has method for oxidation, combustion method, absorption process, adsorption method and bioremediation etc..Due to industry volatile organic matter (VOCs) exhaust gas constituents and the complexity of character and the limitation of single Treatment process, under many circumstances, monotechnics is used often to be difficult to reach to administer requirement, and uneconomical.Utilize the advantage of different units Treatment process, use combined treatment technique to be possible not only to meet emission request, the operating cost of cleaning equipment can be reduced simultaneously.
nullOrganic exhaust gas is processed about absorption method，Modal adsorbent is activated carbon，But either CN204543922U (adsorbent equipment of a kind of novel improved structure)、CN204619676U (a kind of adsorption tower)、CN104785025A (a kind of activated carbon Rose Box)、CN204522680U (ring-type adsorbent equipment) etc.，Or CN104888702A (a kind of bacteriostasis, and deodorization modified adsorbent)、CN104923180A (adsorbent of a kind of absorbing gasoline steam) etc.，All cannot break through the uncommon Organic substance disclosed in empirical equation that adsorbs with Lang Gemiaoer in Fleder adsorb dynamically at activated carbon surface and resolve law，The i.e. gaseous phase partial pressure of pollutant cannot be adsorbed on the activated carbon less than after certain value，Therefore use adsorption treatment high-concentration organic waste gas to realize the NMHC that GB31571-2015 specify and be less than 120mg/m3Emission limit, it is therefore desirable to multi-stage absorption tower, investment and operating cost will be exponentially increased.Additionally, same adsorbent there is also the different component absorbability difference in same waste gas bigger, it is difficult to realize benzene that GB31571-2015 specifies less than 4mg/m3Emission limit.
Summary of the invention
The present invention is aiming in prior art processing volatile organic matter and the above-mentioned various problems of foul gas existence, propose a kind of low temperature plasma Coupling Adsorption and process volatile organic matter and the method for foul gas, number of components in the volatile organic waste gas of Low Temperature Plasma Treating is minimized, especially can fall originally to be unfavorable for the degraded of the straight-chain hydrocarbons of molecular weight of absorption, cycloalkane and mercaptan, thioether class odorant with efficient degradation, thus improve Activated Carbon toward VOCs-Containing Exhausts adsorption effect.Simultaneously when in exhaust gas source, content of organics is relatively low, originally adsorbed Organic substance, waste gas after Low Temperature Plasma Treating can be produced ozone more than needed and aoxidized, activated carbon is regenerated to a certain extent, improve activated carbon service life and adsorption capacity, and improve the low temperature plasma treatment effeciency to organic exhaust gas.
Based on this, the present invention provides a kind of low temperature plasma Coupling Adsorption to process volatile organic waste gas and the equipment of foul gas, it includes that low-temperature plasma device and adsorbent equipment, volatile organic waste gas and foul gas enter back into adsorbent equipment after first passing through low-temperature plasma device process and process.
Wherein, described equipment also includes entrance total hydrocarbon analyser, exhaust gas flow meter, surge tank, air distribution blower fan, air electric butterfly valve, mass air flow sensor, dehumidifier, waste gas electric butterfly valve, air inducing blower fan, ozonolysed tower and outlet total hydrocarbon analyser.
Wherein, in described equipment, entrance total hydrocarbon analyser is connected with exhaust gas flow meter by air channel, exhaust gas flow meter is connected by air channel with surge tank, surge tank is sequentially installed with mass air flow sensor, air electric butterfly valve and air distribution blower fan, air electric butterfly valve is arranged between air distribution blower fan and mass air flow sensor, it is that surge tank is blown by air distribution blower fan, surge tank is connected with dehumidifier, dehumidifier is connected with waste gas electric butterfly valve, waste gas electric butterfly valve is connected on a low-temperature plasma device by air channel, low-temperature plasma device is connected on blower fan by air channel, blower fan is connected with adsorption tanks, adsorption tanks are connected with ozonolysed tower by air channel, ozonolysed tower is connected with outlet total hydrocarbon analyser.
Wherein, described low-temperature plasma device uses corona discharge, single dielectric barrier discharge, double-dielectric barrier discharge, the mode of surface dielectric barrier discharge to produce low temperature plasma.
Wherein, the power supply of described low-temperature plasma device can use high frequency electric source, radio-frequency power supply, the pulse power, a power supply can power as one or more groups discharging tray of low-temperature plasma device.
Wherein, described waste gas electric butterfly valve can be multiple to be connected in parallel by air channel, and each waste gas electric butterfly valve is connected on a low-temperature plasma device, and the low-temperature plasma device being connected in parallel is connected on blower fan by air channel.
Wherein, described low-temperature plasma device is one or more groups discharging tray, and often group discharging tray can arrange one or more pairs of electrode, and waste gas passes sequentially through each group of discharging tray.
Wherein, adsorbent equipment can use adsorbent to include the adsorbing materials such as activated carbon, silica gel, organic polymer organic material.
Present invention also offers employing the said equipment and process volatile organic waste gas and the method for foul gas, comprising:
The first step, waste gas first passes through pretreatment such as leading pouring, dedusting, air distribution, dehumidifying and homogenizing；
Second step, the waste gas through pretreatment is degraded by low-temperature plasma device；
3rd step, the waste gas after degraded can discharge after absorption after ozone decomposed.
High energy electron, ion and living radical that low-temperature plasma device produces can preferential destruction straight-chain hydrocarbons or small molecular organic compounds, it is possible to resolve the activated carbon problem to these material adsorptive selectivities differences.
The saturated adsorbent of the renewable absorption of high energy electron, ion and living radical that low-temperature plasma device produces, can significantly extend the replacement cycle of adsorbent.
High energy electron, ion and the living radical reaction bed that adsorbent equipment can produce as low-temperature plasma device, is remarkably improved the effect of low-temperature plasma degradation volatile organic waste gas and foul gas.
The ozone utilization rate that low-temperature plasma device produces improves, and can reduce usage amount and the regeneration period of ozone-decomposing agent.
Beneficial effects of the present invention:
The equipment being exclusively used in Treatment of Volatile Organic Compounds by Non-Thermal Plasma and foul gas that the present invention provides, when application low temperature plasma Coupling Adsorption method processes organic exhaust gas and the foul gas waste gas that NMHC is less than 100ppm less than 6000ppm and hydrogen sulfide, compared with using absorption method with simple and using low temperature plasma merely, it is possible to realize the benzene in discharge waste gas less than 4mg/m3And various odorant is the most up to standard；Than being used alone, low-temperature plasma physical ability reduces the amount of fill more than 50% of ozone-decomposing agent, the regeneration period extends more than one times.
Accompanying drawing explanation
Fig. 1: low temperature plasma Coupling Adsorption processes volatile organic waste gas and the equipment schematic diagram of foul gas.
Detailed description of the invention
The present invention provides a kind of low temperature plasma Coupling Adsorption to process volatile organic waste gas and the equipment of foul gas, it includes that low-temperature plasma device and adsorbent equipment, volatile organic waste gas and foul gas enter back into adsorbent equipment after first passing through low-temperature plasma device process and process.
Described foul gas is specially inorganic waste gases, such as ammonia and hydrogen sulfide etc..
This equipment can be used for concentration for the treatment of and is less than organic exhaust gas and the foul gas of 100ppm less than 6000ppm and hydrogen sulfide, and the tolerance of process can be from 1-20000Nm3/h。
Described equipment also includes entrance total hydrocarbon analyser, exhaust gas flow meter, surge tank, air distribution blower fan, air electric butterfly valve, mass air flow sensor, dehumidifier, waste gas electric butterfly valve, air inducing blower fan, ozonolysed tower and outlet total hydrocarbon analyser.
In described equipment, entrance total hydrocarbon analyser is connected with exhaust gas flow meter by air channel, exhaust gas flow meter is connected by air channel with surge tank, surge tank is sequentially installed with mass air flow sensor, air electric butterfly valve and air distribution blower fan, air electric butterfly valve is arranged between air distribution blower fan and mass air flow sensor, it is that surge tank is blown by air distribution blower fan, surge tank is connected with dehumidifier, dehumidifier is connected with waste gas electric butterfly valve, waste gas electric butterfly valve is connected on a low-temperature plasma device by air channel, low-temperature plasma device is connected on blower fan by air channel, blower fan is connected with adsorption tanks, adsorption tanks are connected with ozonolysed tower by air channel, ozonolysed tower is connected with outlet total hydrocarbon analyser.
Described low-temperature plasma device uses corona discharge, single dielectric barrier discharge, double-dielectric barrier discharge, the mode of surface dielectric barrier discharge to produce low temperature plasma.
The power supply of described low-temperature plasma device can use high frequency electric source, radio-frequency power supply, the pulse power, a power supply can power as one or more groups discharging tray of low-temperature plasma device.
Described waste gas electric butterfly valve can be multiple to be connected in parallel by air channel, and each waste gas electric butterfly valve is connected on a low-temperature plasma device, and the low-temperature plasma device being connected in parallel is connected on blower fan by air channel.
Described low-temperature plasma device is one or more groups discharging tray, and often group discharging tray can arrange one or more pairs of electrode, and waste gas passes sequentially through each group of discharging tray.
Adsorbent equipment can use adsorbent to include the adsorbing materials such as activated carbon, silica gel, organic polymer organic material.
Present invention also offers employing the said equipment and process volatile organic waste gas and the method for foul gas, comprising:
The first step, waste gas first passes through pretreatment such as leading pouring, dedusting, air distribution, dehumidifying and homogenizing；
Second step, the waste gas through pretreatment is degraded by low-temperature plasma device；
3rd step, the waste gas after degraded can discharge after absorption after ozone decomposed.
High energy electron, ion and living radical that low-temperature plasma device produces can preferential destruction straight-chain hydrocarbons or small molecular organic compounds, it is possible to resolve the activated carbon problem to these material adsorptive selectivities differences.
The saturated activated carbon of the renewable absorption of high energy electron, ion and living radical that low-temperature plasma device produces, can significantly extend the activated carbon replacement cycle.
High energy electron, ion and the living radical reaction bed that adsorbent equipment can produce as low-temperature plasma device, is remarkably improved the effect of low-temperature plasma degradation volatile organic waste gas and foul gas.
The ozone utilization rate that low-temperature plasma device produces improves, and can reduce usage amount and the regeneration period of ozone-decomposing agent.
Hereinafter using embodiment and accompanying drawing to describe embodiments of the present invention in detail, to the present invention, how application technology means solve technical problem whereby, and the process that realizes reaching technique effect can fully understand and implement according to this.
nullAs shown in Figure 1，The low temperature plasma Coupling Adsorption that the present invention provides processes volatile organic waste gas and the equipment of foul gas，Including entrance total hydrocarbon analyser 1、Exhaust gas flow meter 2、Surge tank 3、Air distribution blower fan 4、Air electric butterfly valve 5、Mass air flow sensor 6、Dehumidifier 7、Waste gas electric butterfly valve 8、Blower fan 10、Ozonolysed tower 12 and outlet total hydrocarbon analyser 13、Low-temperature plasma device 9 and adsorbent equipment 11，Volatile organic waste gas and foul gas enter back into adsorbent equipment 11 after first passing through low-temperature plasma device 9 process and process，In described equipment, entrance total hydrocarbon analyser 1 is connected with exhaust gas flow meter 2 by air channel，Exhaust gas flow meter 2 is connected by air channel with surge tank 3，Surge tank 3 is sequentially installed with mass air flow sensor 6、Air electric butterfly valve 5 and air distribution blower fan 4，Air electric butterfly valve 5 is arranged between air distribution blower fan 4 and mass air flow sensor 6，Blown for surge tank by air distribution blower fan 4，Surge tank 3 is connected with dehumidifier 7，Dehumidifier 7 is connected with waste gas electric butterfly valve 8，Waste gas electric butterfly valve 8 is connected on a low-temperature plasma device 9 by air channel，Low-temperature plasma device 9 is connected on blower fan 10 by air channel，Air inducing blower fan 10 is connected with adsorption tanks 11，Adsorption tanks 11 are connected with ozonolysed tower 12 by air channel，Ozonolysed tower 12 is connected with outlet total hydrocarbon analyser 13.
By 200Nm3In industrial volatile organic matter (VOCs) waste gas of/h, NMHC concentration is 2000ppm (with methanometer), open a serial plasma, high frequency voltage 18kV, frequency 20kHz, waste gas NMHC concentration after plasma device of the present invention processes is 180ppm, again through organic polymer adsorbent, in waste gas, NMHC is down to 60ppm, and benzene is down to 4mg/Nm3。
All above-mentioned primary these intellectual properties of enforcement, do not set this new product of enforcement and/or the new method limiting other forms.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But, all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above, be only presently preferred embodiments of the present invention, is not the restriction that the present invention makees other form, and any those skilled in the art are changed possibly also with the technology contents of the disclosure above or are modified as the Equivalent embodiments of equivalent variations.But every without departing from technical solution of the present invention content, any simple modification, equivalent variations and remodeling above example made according to the technical spirit of the present invention, still fall within the protection domain of technical solution of the present invention.
Claims (9)
1. low temperature plasma Coupling Adsorption processes volatile organic waste gas and an equipment for foul gas,
It is characterized in that: include low-temperature plasma device and absorbent charcoal adsorber, volatile organic waste gas and
Foul gas first passes through and enters back into adsorbent equipment process after low-temperature plasma device processes.
2. low temperature plasma Coupling Adsorption as claimed in claim 1 processes volatile organic waste gas and evil
The equipment of odour, it is characterised in that: described equipment also include entrance total hydrocarbon analyser, exhaust gas flow meter,
Surge tank, air distribution blower fan, air electric butterfly valve, mass air flow sensor, dehumidifier, waste gas electric butterfly valve,
Air inducing blower fan, ozonolysed tower and outlet total hydrocarbon analyser.
3. low temperature plasma Coupling Adsorption as claimed in claim 1 or 2 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: in described equipment, entrance total hydrocarbon analyser by air channel and gives up
Air-flow gauge is connected, and exhaust gas flow meter is connected by air channel with surge tank, installs successively on surge tank
Have mass air flow sensor, air electric butterfly valve and air distribution blower fan, air electric butterfly valve be arranged on air distribution blower fan and
Between mass air flow sensor, being that surge tank is blown by air distribution blower fan, surge tank is connected with dehumidifier, removes
Wet machine is connected with waste gas electric butterfly valve, and waste gas electric butterfly valve is connected to a low temperature plasma by air channel
On device, low-temperature plasma device is connected on blower fan by air channel, and blower fan is connected with adsorption tanks,
Adsorption tanks are connected with ozonolysed tower by air channel, and ozonolysed tower is connected with outlet total hydrocarbon analyser.
4. the low temperature plasma Coupling Adsorption as described in claims 1 to 3 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: described low-temperature plasma device uses corona discharge, list
Dielectric barrier discharge, double-dielectric barrier discharge, the mode of surface dielectric barrier discharge produce low-temperature plasma
Body.
5. the low temperature plasma Coupling Adsorption as described in Claims 1-4 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: the power supply of described low-temperature plasma device can use high frequency
Power supply, radio-frequency power supply, the pulse power, a power supply can be as the one of low-temperature plasma device group or many
Group discharging tray is powered.
6. the low temperature plasma Coupling Adsorption as described in claim 1 to 5 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: described waste gas electric butterfly valve can be multiple by air channel also
Connection connects, and each waste gas electric butterfly valve is connected on a low-temperature plasma device, is connected in parallel
Low-temperature plasma device is connected on blower fan by air channel.
7. the low temperature plasma Coupling Adsorption as described in claim 1 to 6 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: described low-temperature plasma device is one or more groups electric discharge
Dish, often group discharging tray can arrange one or more pairs of electrode, and waste gas passes sequentially through each group of discharging tray.
8. the low temperature plasma Coupling Adsorption as described in claim 1 to 7 processes volatile organic waste gas
And the equipment of foul gas, it is characterised in that: absorption can use activated carbon, silica gel, organic polymer material
The adsorbing materials such as material.
9. use equipment described in claim 1 to 8 to process volatile organic waste gas and the method for foul gas,
It is characterized in that, including:
The first step, waste gas first passes through pretreatment such as leading pouring, dedusting, air distribution, dehumidifying and homogenizing；
Second step, the waste gas through pretreatment is degraded by low-temperature plasma device；
3rd step, the waste gas after degraded can discharge after absorption after ozone decomposed.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108246059A (en) * | 2018-03-23 | 2018-07-06 | 鼎格环境科技（苏州）有限公司 | Volatile organic matter coupling purifier |
| CN108325360A (en) * | 2017-06-02 | 2018-07-27 | 中国石油化工股份有限公司 | A kind of compartment low-temperature plasma generator |
| CN108325349A (en) * | 2017-06-02 | 2018-07-27 | 中国石油化工股份有限公司 | A kind of method that low temperature plasma Coupling Adsorption method handles VOCs and foul gas |
| CN108339378A (en) * | 2017-06-02 | 2018-07-31 | 中国石油化工股份有限公司 | A method of improving Low Temperature Plasma Treating pollutant efficiency |
| CN108970363A (en) * | 2017-06-02 | 2018-12-11 | 中国石油化工股份有限公司 | A kind of compartment low-temperature plasma generator for filling ozone-decomposing agent |
| CN109966872A (en) * | 2019-04-22 | 2019-07-05 | 南京艾尔克林工程技术有限公司 | A kind of purifying processing device suitable for organic exhaust gas |
| CN111185049A (en) * | 2018-11-14 | 2020-05-22 | 中国石油化工股份有限公司 | Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net |
| CN111377409A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Plasma apparatus and method for decomposing hydrogen sulfide |
| CN112902198A (en) * | 2021-01-27 | 2021-06-04 | 中冶华天南京工程技术有限公司 | Energy-saving and environment-friendly method for stink and organic waste gas treatment facility |
| CN115228252A (en) * | 2021-04-23 | 2022-10-25 | 中国石油化工股份有限公司 | Low-temperature plasma organic waste gas treatment device and method |
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| CN108970363B (en) * | 2017-06-02 | 2023-11-03 | 中国石油化工股份有限公司 | Interval type low-temperature plasma generator filled with ozone decomposer |
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| CN108325349A (en) * | 2017-06-02 | 2018-07-27 | 中国石油化工股份有限公司 | A kind of method that low temperature plasma Coupling Adsorption method handles VOCs and foul gas |
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| CN111185049A (en) * | 2018-11-14 | 2020-05-22 | 中国石油化工股份有限公司 | Method for reducing aerosol generated by low-temperature plasma treatment of waste gas through adsorption separation net |
| CN111377409A (en) * | 2018-12-29 | 2020-07-07 | 中国石油化工股份有限公司 | Plasma apparatus and method for decomposing hydrogen sulfide |
| CN109966872A (en) * | 2019-04-22 | 2019-07-05 | 南京艾尔克林工程技术有限公司 | A kind of purifying processing device suitable for organic exhaust gas |
| CN112902198A (en) * | 2021-01-27 | 2021-06-04 | 中冶华天南京工程技术有限公司 | Energy-saving and environment-friendly method for stink and organic waste gas treatment facility |
| CN115228252A (en) * | 2021-04-23 | 2022-10-25 | 中国石油化工股份有限公司 | Low-temperature plasma organic waste gas treatment device and method |
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Application publication date: 20160810 |