CN205672786U - A kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier - Google Patents

Abstract

The utility model discloses a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier, including pre-dedusting device and housing, housing includes pre-small post-large import loudspeaker, interlude and pre-large post-small outlet loudspeaker, pre-dedusting device, import loudspeaker, interlude and outlet loudspeaker are sequentially communicated, it is provided with reaction of low temperature plasma device in interlude, being filled with catalyst and activated carbon in reaction of low temperature plasma device, reaction of low temperature plasma device connects high-frequency and high-voltage power supply.This purifier collection lower temperature plasma technology, absorption and catalysis technique are in one, mutually collaborative raising VOCs clearance, this device has to contaminant molecule efficient-decomposition and processes the low feature of energy consumption, using one-part form structure, floor space is little, and the improvement for industry VOCs opens new approaches.

Description

A kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier

Technical field

The utility model relates to a kind of VOCs purification techniques field, specifically relates to a kind of filled type low-temperature plasma synergistic and inhales Attached catalysis VOCs purifier.

Background technology

VOCs(volatile organic compounds), there is volatility, under normal temperature condition, be readily formed VOCs gas, cause VOCs atmosphere pollution, damages the ozone layer, harm human health and ecological environment.Many VOCs materials also can cause city chemistry Smog, causes secondary pollution, produces bigger harm to human health.Additionally, VOCs as pellet precursor it One, it is the major reason causing acid mist, smog.VOCs produces and discharge relates to industrial trade, including petrochemical industry, become more meticulous Work, spraying, packages printing, semiconductor and Electronic products manufacturing, wood-based plate and wood furniture manufacture, leather, coating, ink, viscous Numerous industries such as mixture production, metal manufacture, produce VOCs of a great variety in every profession and trade, composition complexity.Common component has carbon Hydrogen compound, benzene homologues, alcohols, ketone, phenols, aldehydes, esters, amine, nitrile etc..VOCs discharge is closed increasingly widely Note, the whole world detects VOCs about more than 150 in atmosphere and plants, and about more than 80 wherein poisonous kinds, before directly resulting in ozone generation Body thing has more than 60 to plant.The unified official's data of the discharge capacity neither one of current VOCs, promulgate according to Environmental Protection Department in 2012 " key area prevention and control of air pollution " 12 " planning " 2010 whole nation key area key cities VOCs discharge capacity 417.25 tons, but there are some researches show whole nation actual emission about 30,000,000 tons then, Shandong, Zhejiang, Jiangsu discharge capacity top the list, its Middle Shandong Province (79.6 ten thousand tons), Zhejiang Province (52.7 ten thousand tons) and Jiangsu Province (51.3 ten thousand tons), the accounting district that about attaches most importance to attaches most importance to district The 44% of territory VOCs total emission volumn；3 minimum regions are Shanxi (2.6 ten thousand tons), Hunan (2.6 ten thousand tons) and Ningxia (3.95 ten thousand tons). In China, VOCs administers very urgent.

Low temperature plasma is the 4th kind of physical form after solid-state, liquid, gaseous state, when applied voltage reaches gas Discharge voltage when, gas is breakdown, produces mixture including electronics, various ion, atom and free radical.Electric discharge During, although electron temperature is very high, but heavy particle temperature is very low, and whole system presents low-temperature condition, thus referred to as low temperature etc. from Daughter.Low-temperature plasma degradation pollutant is the pollution utilizing in these high energy electrons, free radical isoreactivity particle and waste gas Thing effect, makes contaminant molecule decompose in very short time, and occurs follow-up planting to react the mesh reaching degradation of contaminant 's.

High energy electron, ion, free radical and excited state molecule quantity that double-dielectric barrier discharge produces are extremely many, and traditional The lower temperature plasma technology that corona discharge produces compares, and its power-discharging density is more than 1500 times of corona discharge.With tradition side Method is compared, and lower temperature plasma technology has lot of advantages compared with conventional method, but due to plasma degradation process some Product uncontrollable, may produce some noxious products, cause secondary pollution.

In VOCs field of purification, conventional catalyst is noble metal catalyst, compared with base metal, and precious metal catalyst Agent demonstrates higher catalysis activity, but there is high temperature sintering volatile, easy and expensive shortcoming.Non-metallic catalyst is former Material is abundant, cheap, and has multiple valence state, has preferably catalysis activity and high-temperature stability, but catalytic performance is too late Noble metal.At present, there are some researches show, non-precious metal catalyst can improve catalytic performance by modification.

Activated carbon has very big specific surface area, and unique pore passage structure and higher surface-active, therefore by widely It is used as the absorbent of absorption VOCs, but after the certain pollutant of charcoal absorption, clean-up effect declines, and even lost efficacy, and need to take off Attached regeneration, operates cumbersome, and is easily generated secondary pollution.

Utility model content

For solving above-mentioned technical problem, the utility model devises a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier, introduces appropriate catalyst in low temperature plasma, efficiently controls generation and the distribution of product, Increase CO₂Selectivity, adulterate a certain proportion of activated carbon in the catalyst simultaneously, increases stop in purifier for the waste gas Time, improve energy efficiency.

The utility model adopts the following technical scheme that

A kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier, it includes pre-dedusting device and shell Body, housing includes pre-small post-large import loudspeaker, interlude and pre-large post-small outlet loudspeaker, pre-dedusting device, import loudspeaker, Interlude and outlet loudspeaker are sequentially communicated, and are provided with reaction of low temperature plasma device, reaction of low temperature plasma device in interlude It is inside filled with catalyst and activated carbon, in interlude, be provided with some reaction of low temperature plasma devices, reaction of low temperature plasma Device is double-dielectric barrier discharge plasma reactor, and each low-temperature plasma reactor is arranged in housing abreast along airflow direction In, some reaction of low temperature plasma devices are parallel to be evenly arranged, and is provided with airflow uniform distribution device in import loudspeaker, and airflow uniform distribution fills The form put is venetian blind type, porous type, distribution grid, channel-section steel distribution grid or railing type distribution grid, airflow uniform distribution device Aperture opening ratio is between 40%-60%.Airflow uniform distribution device ensures waste gas evenly into plasma reactor.

As preferably, catalyst and activated carbon in described reaction of low temperature plasma device are filled with fixed-bed type, catalysis Agent is 2:8-4:6 with the filling quality proportion of activated carbon.

As preferably, described catalyst is metal oxide catalyst.Metal oxide catalyst can be CuO/ZnO/ MgO/Al₂O₃Catalyst, and use CeO₂Improving, using zeolite as carrier, the sized zeolite particles of employing is 40-60 mesh.

As preferably, described activated carbon specific surface area scope is 940 m²/g-960m²/ g, pore volume scope is 0.3 ml/g- 0.5 ml/g。

As preferably, described pre-dedusting device is sack cleaner.Pre-dedusting device is primarily to go in removing exhaust gas Dust granules, prevents the catalyst in dust blocking reactor and activated carbon, causes equipment fault.

The utility model device integrates lower temperature plasma technology, adsorption technology and catalysis technique, adding of activated carbon Entering absorption and adding the time of staying in purifier for the VOCs, the carbon adding catalysis to improve degradation process of catalyst is put down Weighing apparatus, catalyst carrier also has suction-operated simultaneously, also has certain increasing action, double-dielectric barrier discharge to the time of staying of VOCs The a large amount of active materials producing, can be with the VOCs in gas and be adsorbed in the pollutant of activated carbon and catalyst surface and occur instead Should, while purifying VOCs, may also reach up the purpose of catalyst and regenerating active carbon.

The beneficial effects of the utility model are: (1) floor space is little；The utility model device uses one-part form structure, knot Structure is compact, is suitable for the VOCs treatment engineering of different air quantity；(2) energy consumption is low, and efficiency is high；At reaction of low temperature plasma device After internal catalyst filling, the synergy of catalyst, greatly reduce the concentration of reaction of low temperature plasma device, be catalyzed simultaneously Agent can promote that the intermediate product that low temperature plasma effect produces is further oxidized to CO further₂And H₂O, and activated carbon with The suction-operated of catalyst ensure that the time of staying in reactor for the VOCs, improves the purification efficiency of equipment；(3) invest Little；Use metal oxide catalyst and the activated carbon of relative low price as packing material, under equal clearance, and expensive Metal oxide catalyst is compared cost of investment and is substantially reduced, and has good application prospect.

Brief description

Fig. 1 is a kind of structural representation of the present utility model；

In figure: the 1st, pre-dedusting device, the 2nd, import loudspeaker, the 3rd, outlet loudspeaker, the 4th, interlude, the 5th, airflow uniform distribution device, the 6th, low Isothermal plasma reactor, the 7th, catalyst, the 8th, activated carbon.

Detailed description of the invention

Below by specific embodiment, and combine accompanying drawing, make further specifically to retouch to the technical solution of the utility model State:

Embodiment: as shown in Figure 1, a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier, its Including pre-dedusting device 1 and housing, housing includes pre-small post-large import loudspeaker the 2nd, interlude 4 and pre-large post-small outlet loudspeaker 3, pre-dedusting device, import loudspeaker, interlude and outlet loudspeaker are sequentially communicated, and are provided with some low temperature plasmas in interlude Reactor 6, is filled with catalyst 7 and activated carbon 8 in reaction of low temperature plasma device, reaction of low temperature plasma device is double media Barrier discharge plasma reactor, each low-temperature plasma reactor is arranged in housing abreast along airflow direction, some low Isothermal plasma reactor is parallel to be evenly arranged, and is provided with airflow uniform distribution device 5 in import loudspeaker, the form of airflow uniform distribution device Can be venetian blind type, porous type, distribution grid, channel-section steel distribution grid or railing type distribution grid, the opening of airflow uniform distribution device Rate is 50%, and the catalyst in reaction of low temperature plasma device and activated carbon are filled with fixed-bed type, and catalyst is filled out with activated carbon Filling mass ratio range is 3:7, and catalyst is metal oxide CuO catalyst, and uses CeO₂Improve, using zeolite as Carrier, the sized zeolite particles of employing is 50 mesh, and activated carbon specific surface area is 950 m²/ g, pore volume is 0.4 ml/g, pre-dedusting device For sack cleaner.

When this purifier runs, after waste gas removing dust is processed, enter import loudspeaker, by airflow uniform distribution device equably Enter low-temperature plasma reactor, plasma oxidation reaction and catalytic oxidation occur in discharge air-gap, generates CO₂With H₂O, simultaneously absorbed portion more dysoxidizable VOCs material, with the continuous action of isothermal plasma, the VOCs material of absorption Also it is gradually oxidized to CO₂And H₂O, finally, the waste gas after purification is discharged from outlet loudspeaker.

Embodiment described above is one of the present utility model preferably scheme, not makees the utility model any Pro forma restriction, also has other variant and remodeling on the premise of without departing from technical scheme described in claim.

Claims (5)

1. a filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier, is characterized in that, it includes that pre-dedusting fills Putting and housing, housing includes pre-small post-large import loudspeaker, interlude and pre-large post-small outlet loudspeaker, pre-dedusting device, enters Mouth loudspeaker, interlude and outlet loudspeaker are sequentially communicated, and are provided with reaction of low temperature plasma device, low temperature plasma in interlude Being filled with catalyst and activated carbon in reactor, reaction of low temperature plasma device is arranged in connecting high-frequency and high-voltage power supply, interlude Having some reaction of low temperature plasma devices, reaction of low temperature plasma device is double-dielectric barrier discharge plasma reactor, each Low-temperature plasma reactor is arranged in housing abreast along airflow direction, the parallel uniform cloth of some reaction of low temperature plasma devices Put, in import loudspeaker, be provided with airflow uniform distribution device, the form of airflow uniform distribution device be venetian blind type, porous type, distribution grid, Channel-section steel distribution grid or railing type distribution grid, the aperture opening ratio of airflow uniform distribution device is between 40%-60%.

2. a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier according to claim 1, it is special Levying and being, the catalyst in described reaction of low temperature plasma device and activated carbon are filled with fixed-bed type, catalyst and activated carbon Filling quality proportion is 2:8-4:6.

3. a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier according to claim 1, it is special Levying and being, described catalyst is metal oxide catalyst.

4. a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier according to claim 1, it is special Levying and being, described activated carbon specific surface area scope is 940 m²/g-960m²/ g, pore volume scope is 0.3 ml/g-0.5 ml/g.

5. a kind of filled type low-temperature plasma synergistic adsoption catalysis VOCs purifier according to claim 1, it is special Levying and being, described pre-dedusting device is sack cleaner.