CN205379786U - Gaseous phase photodissociation - liquid phase light catalytic oxidation purifies volatile organic compounds's device - Google Patents
Gaseous phase photodissociation - liquid phase light catalytic oxidation purifies volatile organic compounds's device Download PDFInfo
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- CN205379786U CN205379786U CN201521123854.5U CN201521123854U CN205379786U CN 205379786 U CN205379786 U CN 205379786U CN 201521123854 U CN201521123854 U CN 201521123854U CN 205379786 U CN205379786 U CN 205379786U
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Abstract
The utility model discloses a gaseous phase photodissociation - liquid phase light catalytic oxidation purifies volatile organic compounds's device. Gaseous phase photodissociation - liquid phase light catalytic unit, including gaseous phase photodissociation room, liquid phase photocatalysis spray column and liquor recovery regeneration case, its characterized in that, be equipped with waste gas air inlet unit, filter ball layer, absorption liquid spray set and gas discharging hole in the liquid phase photocatalysis spray column from bottom to top in proper order, the lower part of liquid phase photocatalysis spray column links to each other with the upper portion of liquor recovery regeneration case, liquor recovery regeneration case passes through liquid supply pipeline, the circulating pump links to each other with absorption liquid spray set, still be equipped with ultraviolet lamp and gaseous phase photodissociation room in the liquid phase photocatalysis spray column, the ultraviolet lamp in the liquid phase photocatalysis spray column sets up between filter ball layer and gas discharging hole, absorption liquid spray set's end is equipped with a plurality of atomizing nozzle, gaseous phase photodissociation room includes the quartz glass sleeve pipe and locates the ultraviolet lamp in it, the quartz glass sleeve pipe links to each other with air inlet and waste gas air inlet unit respectively. This device has simple structure, pollutant degradation and does not thoroughly just have advantages such as secondary waste water pollution, purification efficiency is high, the operation is stable, and can go on under normal atmospheric temperature, and reaction sequence is slowly simple, has higher economic benefits.
Description
Technical field
This utility model belongs to gas pollutant process field, in particular it relates to a kind of gas phase photolysis-organic device of liquid phase photochemical catalytic oxidation purifying volatile.
Background technology
Along with quickly propelling of Chinese Urbanization and process of industrialization, the discharge capacity of organic exhaust gas is increasing, and air pollution is on the rise, and the volatile organic matter (VOCs) in surrounding air is substantially improved.Volatile organic matter (VOCs) is China air key pollutants PM2.5 and O3The important as precursors thing formed, easily intercouples with other atmosphere pollution, and the new pollutant formed are difficult to natural decomposition, and it is more lasting to endanger.Additionally, it can also participate in photochemical reaction, cause photochemical pollution.Human body and various sense organ, often with stench, are not only had stimulation, and have certain toxicity by organic exhaust gas, and health causes great harm.The improvement that eliminates of organic exhaust gas is a urgent and important job, becomes difficult point and the focus of current research.
Technique such as activated carbon adsorption that at present application is more, catalysis burning etc. still suffer from certain limitation in actual use, it is difficult to meet Abgasgesetz and people's an urgent demand to improving air quality of increasingly stringent.As absorption method can not fundamentally eliminate pollutant, its desorption equipment, control system and desorption operating cost are high, need regeneration or change after adsorbent is saturated.Catalysis burning is generally with noble metal for catalyst, and cost is high；Carry out there is potential safety hazard and catalyst easy in inactivation in hot environment；Organic exhaust gas concentration is relatively low needs outside heat to maintain burning.
Photocatalysis technology is to obtain extensive concern in recent years, can light at room temperature according under decomposing organic matter, there is the advantages such as oxidability is strong, reaction condition is gentle, be the more promising technology of one.But conventional gas/solid photochemical catalytic oxidation volatile organic matter process can produce the intermediate products such as aldehyde, ketone, acid and ester, not only cause secondary pollution, and intermediate product covers catalytic active site and can cause that catalyst efficiency declines even complete deactivation, and the by-product such as gas residual ozone after purifying.These problems become the bottleneck that this technology of restriction develops further and applies.For improving photocatalytic degradation efficiency, effectively solving catalysqt deactivation and elimination ozonation by-product, gas/solid photochemical catalytic oxidation organic exhaust gas system need to be changed.
Utility model content
This utility model, for the deficiency of VOCs treatment technology in prior art, proposes on gas/solid light-catalysed basis
A kind of gas phase photolysis-organic device of liquid phase photochemical catalytic oxidation purifying volatile.
Above-mentioned purpose of the present utility model is achieved by the following technical programs.
A kind of gas phase photolysis-organic device of liquid phase photochemical catalytic oxidation purifying volatile, case is regenerated including gas phase photolysis room, liquid phase photocatalysis spray column and liquids recovery, it is sequentially provided with gas inlet device, filter bulb layer in described liquid phase photocatalysis spray column from bottom to top, absorbs liquid spray equipment and gas discharge outlet, the top that the bottom of described liquid phase photocatalysis spray column regenerates case with liquids recovery is connected, and described liquids recovery regeneration case is connected with absorption liquid spray equipment by liquor charging pipeline, circulating pump；It is additionally provided with uviol lamp and gas phase photolysis cell in described liquid phase photocatalysis spray column, uviol lamp in liquid phase photocatalysis spray column is arranged between filter bulb layer and gas discharge outlet, the end of described absorption liquid spray equipment is provided with several atomizers, described gas phase photolysis room includes quartz glass sleeve and sets uviol lamp in the inner, and described quartz glass sleeve is connected with air inlet and gas inlet device respectively.
During use, liquids recovery regeneration case is built with catalyst slurry, and this catalyst slurry is by circulating pump, liquor charging pipeline and absorbs liquid spray equipment from liquid phase photocatalysis spray column top with Sprayable ejection.When waste gas from air inlet after the photodissociation of gas phase photolysis room, liquid phase photocatalysis spray column is passed into then through gas inlet device, contact by the waste gas of filter bulb layer is reverse with spraying, carry out liquid phase photochemical catalytic oxidation step, transfer major part waste gas to harmless micromolecular compound, fraction intermediate product transfers to catalyst by man of wild origin, the degraded of liquid phase photocatalysis further exhaustive oxidation, and regenerates the catalyst slurry after in-situ synchronization in case processes in liquids recovery and continue cycling through use.Described liquid phase photocatalysis spray column and gas phase photolysis chamber are equipped with uviol lamp, the uviol lamp of gas phase photolysis indoor cannot be only used for gas phase photolysis, owing to gas phase photolysis room is quartz glass sleeve, in it, the liquid phase photocatalytic process in liquid phase photocatalysis spray column also can be played a role by uviol lamp, thus being beneficial to the quantity reducing uviol lamp, efficient energy-saving.
Gas phase photolysis is effectively combined by this utility model with liquid phase photochemical catalytic oxidation, and two steps influence each other, synergism, it is impossible to segmentation.Described method fundamentally solves the gas-solid photocatalytic surfaces intermediate product catalysqt deactivation that causes of deposition and the problem such as VOCs liquid phase scrubbing efficiency is low, by various procedures synergism such as high energy ultraviolet photodissociation, liquid phase photocatalysis and catalytic ozonations, reduce generation and the accumulation of intermediate product, it is achieved the degraded of organic exhaust gas efficient stable.Make it provide energy for gas phase photolysis, liquid phase photochemical catalytic oxidation additionally, the method makes full use of ultraviolet luminous energy simultaneously, and the ozone produced in gas phase photolysis process also can strengthen VOCs oxidation under liquid-phase catalyst effect.
Described catalyst slurry is with water for medium, add titanium dioxide or the titanium dioxide after transition metal modified mixes, than common titanium dioxide, there is higher photocatalytic activity, excite lower catalyst and water can produce the free radical of more strong oxidizing property at uviol lamp, raising system oxidability, can decomposition Recalcitrant chemicals in non-selectivity ground be carbon dioxide and water, there is strong organic exhaust gas adsorption performance, high ozone utilization ratio and highlight catalytic active.This utility model method have purification efficiency height, reaction temperature and, process is simple, stable performance and economic dispatch plurality of advantages, it can administer, for volatile organic matter, the solution providing a kind of new high-efficiency and economic.
Preferably, the uviol lamp of described liquid phase photocatalysis spray column, gas phase photolysis indoor is equipped with several, is the vacuum UV lamp of 185nm.
Preferably, the uviol lamp in described liquid phase photocatalysis spray column is distributed ringwise.It is highly preferred that the uviol lamp in liquid phase photocatalysis spray column forms one or more levels annular array, can forming one or more layers annular in spray column, outermost uviol lamp is uniformly distributed along spray column inwall.
Preferably, described gas phase photolysis room is provided with several quartz glass sleeves being parallel to each other, and by pipeline communication between quartz glass sleeve, is respectively equipped with uviol lamp in it.
Preferably, described gas phase photolysis room is located in gas inlet device.
Preferably, described absorption liquid spray equipment includes some solution arms, described solution arm all with liquor charging pipeline communication.It is highly preferred that described solution arm is provided with arm controls valve, for controlling uninterrupted and the atomizing effect of described absorption liquid spray equipment.
Preferably, described atomizer adopts stainless steel precision high-dispersion noz(zle), and atomizing particle reaches 50-100 μm, still prevents absorbed liquid corrosion.According to the kind of waste gas, water solublity, flow and concentration etc., it is preferable that the bore of described atomizer is 1-3mm, it is ensured that catalyst granules passes through and do not block.Preferably, described atomizer is provided with radial spray pipe, and spraying radially sprays, and is more conducive to be fully contacted with waste gas.
Preferably, described gas inlet device is provided with several outlet passageways, and described outlet passageway is corresponding with the position of described atomizer.Described outlet passageway is upward just to atomizer, or consistent with the direction of atomizer down.As a kind of embodiment, described outlet passageway is venthole, and described venthole is equal with the quantity of described atomizer, and position is corresponding.As another embodiment, described gas inlet device is provided with flaring air-guide disk, and described air-guide disk is opening down and inside arranges some layers of outlet passageway.
Preferably, the uviol lamp length in described liquid phase photocatalysis spray column is 1200mm-1800mm, is adjusted according to the height of described spray column, it is ensured that comprehensive by irradiation under ultraviolet ray in described spray column.
Preferably, described filter bulb layer, with polypropylene filter bulb for filler, is highly 10cm-30cm.
Preferably, described absorption liquid spray equipment be arranged over demister, described demister adopts spiral-flow plate-type demister or Flat defroster.
Preferably, described liquor charging pipeline is provided with and send hydraulic control valve.
Preferably, described liquid phase photocatalysis spray column is provided with access panel.
Compared with prior art, this utility model has the beneficial effects that: gas phase photolysis is combined by this utility model with liquid phase photocatalysis, wherein gas phase photolysis is except a part of organic exhaust gas of degrading, also can produce ozone for ozone oxidation degradation organic waste gas, improve the degradation rate of organic exhaust gas, in addition the intermediate product that photodissociation produces is solubility, is conducive to it to degrade further.And liquid phase photocatalysis overcomes the problem of catalyst easy in inactivation in traditional gas/solid light-catalyzed reaction, due to the washing effect in liquid phase, intermediate product washing departs from catalyst surface, photocatalysis efficient stable is carried out, in addition in liquid phase, the use of strong adsorptivity, high ozone utilization rate and highlight catalytic active catalyst can realize the degraded of volatile organic matter organic exhaust gas efficient stable, and the final also volatile organic matter that realizes can realize innoxious.And can carry out under the method room temperature, course of reaction is gentle and simple, has higher economic benefit.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of embodiment 1 device.
Fig. 2 is the air-guide disk of gas inlet device described in embodiment 1.
Air-guide disk outlet upward view described in Fig. 3.
Fig. 4 is the overall structure schematic diagram of embodiment 2 device.
Caption: 1-liquid phase photocatalysis spray column；2-circulating pump；3-gas phase photolysis room；4-photolysis cell uviol lamp；5-liquor charging pipeline；6-send hydraulic control valve；7-access panel；8-spray column uviol lamp；9-absorbs liquid spray equipment；10-atomizer；11-filter bulb layer；12-demister；13-gas inlet device；14-gas discharge outlet；15-liquids recovery regeneration case；16-air-guide disk.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, this utility model is described in further details, but this utility model is not limited in any form by embodiment.Wherein, being merely cited for property of accompanying drawing illustrates, expression is only schematic diagram, but not pictorial diagram, it is impossible to it is interpreted as the restriction to this patent；In order to of the present utility model embodiment is better described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product；It will be understood by those skilled in the art that some known features and explanation thereof are likely to omission and will be understood by accompanying drawing.
Embodiment 1
The present embodiment provides a kind of gas phase photolysis based on said method-liquid phase photocatalysis apparatus, as shown in Fig. 1 ~ 3, case 15 is regenerated including gas phase photolysis room 3, liquid phase photocatalysis spray column 1 and liquids recovery, it is sequentially provided with gas inlet device 13, filter bulb layer 11 in described liquid phase photocatalysis spray column 1 from bottom to top, absorbs liquid spray equipment 9, demister 12 and gas discharge outlet 14, the top that the bottom of described liquid phase photocatalysis spray column 1 regenerates case 15 with liquids recovery is connected, and described liquids recovery regeneration case 15 is connected with absorbing liquid spray equipment 9 by liquor charging pipeline 5, circulating pump 2.Described absorption liquid spray equipment 9 includes some solution arms, and described solution arm all connects with liquor charging pipeline 5, and described solution arm is provided with arm and controls valve, for controlling uninterrupted and the atomizing effect of described absorption liquid spray equipment.The end of described absorption liquid spray equipment 9 is provided with several stainless steel precision high-dispersion noz(zle)s 10, and atomizing particle reaches 50-100 μm, still prevents absorbed liquid corrosion.Described gas inlet device 13 is provided with flaring air-guide disk 16, and described air-guide disk 16 is opening down and inside arranges some layers of outlet passageway.Described outlet passageway is consistent with the direction of atomizer 10 down.Described filter bulb layer 11, with polypropylene filter bulb for filler, is highly 10cm-30cm.Described liquor charging pipeline 5 is provided with and send hydraulic control valve 6.Described liquid phase photocatalysis spray column 1 is provided with access panel 7.
More specifically, described gas inlet device 13 includes the air inlet, quartz glass sleeve and the air-guide disk 16 that are interconnected.Described gas phase photolysis room 3 is located between filter bulb floor 11 and liquids recovery regeneration case 15, is made up of quartz glass sleeve and the 185nm photolysis cell uviol lamp 4 setting some levels in the inner.Also vertically being provided with some 185nm spray column uviol lamps 8 in described liquid phase photocatalysis spray column 1, spray column uviol lamp 8 is arranged between filter bulb layer 11 and gas discharge outlet 14.Spray column uviol lamp 8 length in described liquid phase photocatalysis spray column 1 is 1200mm-1800mm, is adjusted according to the height of described spray column, it is ensured that comprehensive by irradiation under ultraviolet ray in described spray column.
During use, waste gas enters gas phase photolysis room 3 by the air inlet of gas inlet device 13, after the gas phase photolysis effect of photolysis cell uviol lamp 4, enters in liquid phase photocatalysis spray column 1 again through air-guide disk 16, reverse contact with catalyst slurry spraying, carry out liquid phase photochemical catalytic oxidation step.It is equipped with uviol lamp in described liquid phase photocatalysis spray column 1 and gas phase photolysis cell 3, photolysis cell uviol lamp 4 in gas phase photolysis room 3 cannot be only used for gas phase photolysis, owing to gas phase photolysis room 3 is quartz glass sleeve, in it, the liquid phase photocatalytic process in liquid phase photocatalysis spray column 1 also can be played a role by uviol lamp, thus being beneficial to the quantity reducing uviol lamp, efficient energy-saving.
Embodiment 2
Gas phase photolysis-liquid phase photocatalysis apparatus that the present embodiment provides is substantially identical with embodiment 3, as shown in Figure 4, it is different in that, described quartz glass sleeve and photolysis cell uviol lamp 4 are and are vertically arranged, described gas phase photolysis room 3 is provided with two quartz glass sleeves being parallel to each other, between by pipeline communication, be respectively equipped with photolysis cell uviol lamp 4 in two quartz glass sleeves, by pipeline communication between quartz glass sleeve, in it, it is respectively equipped with photolysis cell uviol lamp 4.
Obviously, above-described embodiment of the present utility model is only used to clearly demonstrate this utility model example, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, here without also cannot all of embodiment be given exhaustive.All any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and spirit, should be included within this utility model scope of the claims.
Claims (8)
1. gas phase photolysis-organic device of liquid phase photochemical catalytic oxidation purifying volatile, case is regenerated including gas phase photolysis room, liquid phase photocatalysis spray column and liquids recovery, it is characterized in that, it is sequentially provided with gas inlet device, filter bulb layer in described liquid phase photocatalysis spray column from bottom to top, absorbs liquid spray equipment and gas discharge outlet, the top that the bottom of described liquid phase photocatalysis spray column regenerates case with liquids recovery is connected, and described liquids recovery regeneration case is connected with absorption liquid spray equipment by liquor charging pipeline, circulating pump；It is additionally provided with uviol lamp and gas phase photolysis cell in described liquid phase photocatalysis spray column, uviol lamp in liquid phase photocatalysis spray column is arranged between filter bulb layer and gas discharge outlet, the end of described absorption liquid spray equipment is provided with several atomizers, described gas phase photolysis room includes quartz glass sleeve and sets uviol lamp in the inner, and described quartz glass sleeve is connected with air inlet and gas inlet device respectively.
2. device according to claim 1, it is characterised in that the uviol lamp of described liquid phase photocatalysis spray column, gas phase photolysis indoor is equipped with several, is the vacuum UV lamp of 185nm.
3. device according to claim 2, it is characterised in that the uviol lamp in described liquid phase photocatalysis spray column is distributed ringwise.
4. device according to claim 2, it is characterised in that described gas phase photolysis room is provided with several quartz glass sleeves being parallel to each other, by pipeline communication between quartz glass sleeve, is respectively equipped with uviol lamp in it.
5. device according to claim 1, it is characterised in that described atomizer adopts stainless steel precision high-dispersion noz(zle).
6. device according to claim 1, it is characterised in that described gas inlet device is provided with several outlet passageways, described outlet passageway is corresponding with the position of described atomizer.
7. device according to claim 1, it is characterised in that described absorption liquid spray equipment be arranged over demister, described demister adopts spiral-flow plate-type demister or Flat defroster.
8. device according to claim 1, it is characterised in that described liquor charging pipeline is provided with and send hydraulic control valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521123854.5U CN205379786U (en) | 2015-12-31 | 2015-12-31 | Gaseous phase photodissociation - liquid phase light catalytic oxidation purifies volatile organic compounds's device |
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| CN201521123854.5U CN205379786U (en) | 2015-12-31 | 2015-12-31 | Gaseous phase photodissociation - liquid phase light catalytic oxidation purifies volatile organic compounds's device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268237A (en) * | 2016-10-20 | 2017-01-04 | 湖南野森环保科技有限责任公司 | A kind of high-concentration industrial waste gas purification discharge tower |
| CN109126456A (en) * | 2018-09-25 | 2019-01-04 | 南京圆点环境清洁技术有限公司 | A kind of photooxidation catalytic waste gas processing unit |
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2015
- 2015-12-31 CN CN201521123854.5U patent/CN205379786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106268237A (en) * | 2016-10-20 | 2017-01-04 | 湖南野森环保科技有限责任公司 | A kind of high-concentration industrial waste gas purification discharge tower |
| CN109126456A (en) * | 2018-09-25 | 2019-01-04 | 南京圆点环境清洁技术有限公司 | A kind of photooxidation catalytic waste gas processing unit |
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