CN107930364A - A kind of cleaning system for microparticle and the mixture of volatile organic gases - Google Patents

Abstract

The invention belongs to the technical field of waste gas purification, and specifically relates to a purification system for a mixture of microparticles and volatile organic gases, including a particulate filter, a wet oxidation reaction tower, a photocatalytic reaction module, a fan and flue gas connected in sequence Emission device; the photocatalytic reaction module is a single or multiple photocatalytic reactors arranged in parallel; the photocatalytic reactor includes an electrodeless ultraviolet lamp, a quartz sleeve and an outer cylinder, and the electrodeless ultraviolet lamp includes an inner electrode, an outer electrode and a variable high voltage A power supply, each inner wall of the outer cylinder body is evenly fixed with a catalyst slide, and the catalyst slide is uniformly coated with a catalyst. The beneficial effects of the present invention are: three treatment methods are used for synergistic purification to completely decompose waste gas; variable high-voltage power supply can be adjusted, and low-pressure mixed gas can also be changed to obtain ultraviolet light of different wavelengths, which can degrade different waste gases without the need for Using activated carbon adsorption, high purification efficiency, low cost, easy to use.

Description

A purification system for mixtures of particulates and volatile organic gases

technical field

The invention belongs to the technical field of waste gas purification, and in particular relates to a purification system for the mixture of microparticles and volatile organic gases.

Background technique

Volatile organic compounds (VOCs) are one of the most important pollutants in the air. Many VOCs are highly toxic and are odorous substances, which pose serious hazards to human health. VOCs substances can also produce photochemical smog with NOx emitted by automobiles and factories to form ozone and formaldehyde. Therefore, VOCs are important precursors for the formation of secondary organic aerosol particles and O ₃ , and are formed by atmospheric composite pollution and haze. The essential. VOCs can also affect the earth's radiation balance, reduce atmospheric visibility, and seriously endanger human health and the ecological environment.

Some industries, such as petroleum industry, chemical industry, etc., will produce a large amount of exhaust gas during operation, including particulates (atomized particles) and volatile organic gases (VOCs). Particulates usually adopt dry method (filter cotton, filter plate, filter paper and other filters) and water washing method, while VOCs exhaust gas mainly adopts absorption method, plasma technology, adsorption-combustion combined treatment method, etc. The utility model patent with the publication number 203842462U discloses "a gas purification device for coating production", which mainly adopts the method of "liquid absorption + filtration". The technical solution of the above patent has a good removal effect on particulate matter, but has no effect on VOCs. very good result.

In addition, the absorption method is widely used to treat organic waste gas such as petrochemical industry. Due to the low chemical activity of benzene series in the waste gas, physical absorption method is usually used. The key and difficulty of the technology lies in the selection of absorbent; the adsorption method usually uses activated carbon as the adsorption method to purify VOCs. The purification efficiency is high, but the discarded adsorbent needs to be regenerated or specially treated as hazardous waste, which brings additional treatment costs; and the regeneration of the adsorbent is also very troublesome and difficult. Therefore, in view of the shortcomings of the above-mentioned single method, it is very necessary to develop a waste gas treatment process for the mixture of fine particles and volatile organic gases, which is simple to operate, low in treatment cost, and widely used.

Contents of the invention

The purpose of the present invention is to overcome the defects existing in the prior art, to provide a collaborative purification using three treatment methods, thoroughly decomposing waste gas, high purification efficiency, adjustable high-voltage power supply, and low-pressure mixed gas, so as to obtain different The ultraviolet light of the wavelength can degrade different exhaust gases, with higher energy utilization rate and better exhaust gas treatment effect. It is a purification system for the mixture of micro particles and volatile organic gases.

The technical solution adopted by the present invention to solve the technical problem is: a purification system for the mixture of microparticles and volatile organic gases, which includes a particulate filter, a wet oxidation reaction tower, a photocatalytic reaction module, The fan and flue gas exhaust device; the photocatalytic reaction module is a single photocatalytic reactor or multiple photocatalytic reactors arranged in parallel; the photocatalytic reactor includes an electrodeless ultraviolet lamp, a quartz sleeve and an outer cylinder, and the electrodeless ultraviolet lamp includes an inner electrode, outer electrode and variable high-voltage power supply, a gas-filled chamber is provided between the inner electrode and the outer electrode, the gas-filled chamber is filled with a mixture of inert gas and halogen gas or a mixture of inert gas and mercury vapor, the inner electrode and the outer electrode The electrodes are connected to the positive and negative poles of the variable high-voltage power supply in one-to-one correspondence; the quartz sleeve and the outer cylinder are sequentially sleeved on the electrodeless ultraviolet lamp from the inside to the outside, and the two ends of the quartz sleeve are sleeved with tube plates, and the outer cylinder The body is fixed on the quartz sleeve through a tube plate, and a reaction gas inlet is provided on one tube plate, and the reaction gas inlet pipe is connected to the gas phase outlet at the top of the wet oxidation reaction tower, and the gas phase outlet at the top of the wet oxidation reaction tower is provided with Demister, the gas phase inlet of the wet oxidation reaction tower is located at the bottom of the tower; there is a reaction gas outlet on the other tube plate, and the reaction gas outlet pipe is connected to the fan inlet; the outer cylinder body, the two tube plates and the quartz sleeve are formed Catalytic reaction chamber; the two ends of the quartz sleeve are fixed with polytetrafluoroethylene porous rings, and the two ends of the electrodeless ultraviolet lamp are respectively inserted in the two polytetrafluoroethylene porous rings; the quartz sleeve, two polytetrafluoroethylene porous rings A nitrogen chamber is formed between the tetrafluoroethylene porous ring and the electrodeless ultraviolet lamp; one end of the quartz sleeve is a nitrogen inlet, and the other end of the quartz sleeve is a nitrogen outlet, and the nitrogen inlet and nitrogen outlet pass through their respective polytetrafluoroethylene porous rings. The through hole of the outer cylinder is connected to the nitrogen chamber; the outer cylinder is a rectangular cylinder, and each inner wall of the outer cylinder is evenly fixed with a plurality of catalyst slides, and the catalyst slides are evenly coated with catalysts.

When the purification system of the present invention is working, the blower is turned on, and the waste gas containing particles and volatile organic gases enters through the particle filter, and the gas inlet of the wet oxidation reaction tower is located at the bottom and the lowest end of the tower. During the rising process of the gas, the gas reacts cross-flow with the oxidant aqueous solution sprayed on the upper part, the oxidation reaction produces harmless substances, and the waste water generated at the same time enters the bottom of the tower for storage. The gas that absorbs most of the VOCs through the wet oxidation reaction tower is demistered by the demister, and then enters the photocatalytic reaction module through the pipeline to further oxidize and purify the organic waste gas. The organic waste gas is directly decomposed under the ultraviolet rays generated by the photocatalytic reaction module. Or it is oxidized by active free radicals on the surface of the catalyst, and the exhaust gas after three-stage purification is driven by a fan and discharged into the flue gas discharge device. Among them, the flue gas discharge device is preferably a chimney.

The present invention adopts three processing methods of filtration, chemical absorption oxidation of wet oxidation equipment and UV photocatalysis for synergistic purification, which can avoid the thorough purification of the mixture of microparticles and VOCs by a single filtration, absorption and adsorption method, and a single chemical oxidation cannot Efficient absorption of organic volatile gases, single UV photocatalysis has low purification effect on high-concentration organic volatile gases and other defects, and can treat a variety of single-use filtration, chemical absorption oxidation or UV photocatalysis (or require large energy consumption) ) completely decomposes the waste gas, which greatly reduces the investment in equipment cost, and has high purification efficiency, small footprint, simple installation and operation, and low operating costs, and two of the processing units can be combined according to the fluctuation of waste gas flow and properties (eg wet oxidation + photocatalysis or filtration + wet oxidation) are used.

In addition, in the photocatalytic reactor in the photocatalytic reaction module, after the wet-oxidized waste gas enters the catalytic reaction chamber from the reaction gas inlet, the variable high-voltage power supply is energized, and the dielectric barrier discharge is used to stimulate light emission, and the discharge voltage is used to And the variable high-voltage power supply with adjustable input power excites the low-pressure mixed gas (rare gas-mercury vapor or rare gas-halogen) discharge between the double-layer medium to produce excimer ultraviolet radiation, and the low-pressure mixed gas is excited to produce excimer The ultraviolet light further thoroughly decomposes the volatile organic waste gas in the catalytic reaction chamber outside the quartz sleeve, and the harmless gas formed by the decomposition is discharged from the reaction gas outlet, driven by a fan, and discharged into the flue gas discharge device, which thoroughly purifies the Volatile organic gases, to achieve zero pollution emissions. According to the ultraviolet wavelength corresponding to the maximum ultraviolet absorption cross-section that mainly removes gaseous pollutant molecules, the present invention can adjust the variable high-voltage power supply, and can also change the low-pressure mixed gas in the gas-filled chamber. The adjustable range of wavelength λ is between 100-400nm In order to obtain different wavelengths of ultraviolet light (vacuum ultraviolet VUV and UV), the type of catalyst can also be changed, so as to degrade different components and different contents of exhaust gas in a targeted manner, with higher energy utilization rate and better exhaust gas treatment effect. The pollutants are effectively purified, and the use is flexible and convenient.

Among them, the nitrogen chamber can continuously enter and exit through the nitrogen inlet and nitrogen outlet, which can take away the surface heat of the electrodeless ultraviolet lamp, and at the same time avoid the absorption of ultraviolet light by _O2 in the air, and improve the utilization rate of light.

In addition, long-term use of the catalyst will cause failure. The present invention uses the catalyst glass slide as the carrier of the catalyst, which can be replaced regularly and is convenient to use. In addition, the outer cylinder body is a rectangular cylinder body, which is convenient for fixing the catalyst glass slide and is more convenient to use.

Specifically, the outer surface of the quartz sleeve is evenly coated with a catalyst, which further improves the catalytic effect. In addition, when the catalyst fails, it can also be wiped and reapplied with a new catalyst, which is convenient to use.

Preferably, the catalyst is pure TiO ₂ , molecular sieve, activated alumina or TiO ₂ doped with non-metal elements; more preferably, the catalyst is TiO ₂ doped with graphene.

Specifically, a deflector is provided at the exhaust gas inlet of the particle filter, and a plurality of fixed rings are concentrically arranged on the deflector, and a plurality of fins uniformly distributed around the circumference and arranged in a radial shape are passed between any two adjacent fixed rings. Divided into multiple fan-shaped channels. This structure facilitates the uniform distribution of exhaust gas and guides it into the filter channel of the particle filter.

Further, in the direction from the inlet of the particulate filter to the outlet, a first-stage filter material, a second-stage filter material, and a third-stage filter material are sequentially arranged in the filter channel of the particulate filter, and the first-stage filter material is a plurality of pieces Filter plates arranged in parallel, there is a gap between any two adjacent filter plates, and each filter plate is evenly distributed with filter holes; from the inlet to the outlet of the particle filter, the pore diameter of the filter holes of the filter plate decreases , the density of the filter holes of the filter plate is increasing; the second-stage filter material is glass wool, and the third-stage filter material is a plurality of stacked filter papers. The three-stage filter material of the present invention can be installed on a detachable porous bracket, and the resistance when the filter material is filled ensures that the gas passes through as low as possible; in addition, one side of the shell of the particle filter can be provided with multiple filters for easy installation of three-stage filter The installation hole of the material is sealed with a flange cover after installation; the filter aperture and filter gap width of the multi-stage series filter structure are gradually reduced, which realizes the hierarchical filtration and purification of exhaust gas, increases the filter area, and enhances the filter effect. In turn, the removal rate of microparticles is improved.

Further, the pH regulator inlet pipeline of the wet oxidation reaction tower is connected to the pH regulator storage tank, the oxidant inlet pipeline of the wet oxidation reaction tower is connected to the oxidant storage tank, and the wet oxidation reaction tower is connected with a tap water inlet pipe; In the oxidation reaction tower, demisters and multiple packing layers are installed sequentially from bottom to top. Spraying devices are installed above each packing layer. The bottom of the oxidation reaction tower is connected to the bottom of the oxidation reaction tower with a waste water outlet pipe, and the gas phase inlet of the oxidation reaction tower is located below the packing layer at the lower end; NaClO. The wet oxidation reaction tower can be equipped with at least one set of spraying devices and demisters. The wet oxidation reaction tower is equipped with a nozzle to evenly spray the oxidation absorption liquid on the packing. When the waste gas passes through the packing, the contact area between the waste gas and the oxidation absorption liquid is increased. , to increase absorption efficiency. The wet oxidation reaction tower of the present invention is a heterogeneous reaction tower, and a packing layer is installed in the tower through supports such as grids, and the filler in the packing layer is preferably glass beads. When the organic gas in the exhaust gas passes through the packed tower from bottom to top, it contacts with the oxidant sprayed on the top in cross-flow, and undergoes a heterogeneous reaction on the surface of the packing, so as to realize the efficient degradation of VOCs. The degraded gas passes through the defoaming at the top of the tower. After the water is removed by the filter, it enters the next processing unit. The sprayed oxidant is sprayed down through the spraying device at a certain flow rate by the circulating pump, and is discharged through the waste water outlet pipe after being saturated for many times, and fresh oxidant is replenished from the oxidant storage tank. The oxidant used is NaClO, and the treatment effect is good. If necessary, the pH adjuster storage tank can be used to adjust the pH in the wet oxidation reaction tower.

Further, the storage tank of the pH regulator is a sulfuric acid storage tank or a sodium hydroxide storage tank, which can be used for acid-base adjustment.

Further, above each layer of packing layer, manholes are provided on the side wall of the wet oxidation reaction tower to facilitate installation and maintenance; the bottom of the wet oxidation reaction tower protrudes to one side and is connected with a spray liquid collection The top of the spray liquid collection box is equipped with a stirrer and a pH meter extending to the bottom of the box. The tap water inlet pipe, pH regulator storage tank and oxidant storage tank are all connected to the top of the spray liquid collection box. The circulation pump The inlet pipeline is connected to the bottom of the spray liquid collection tank, and a flow meter is arranged in the pipeline between the circulation pump and the inlet of the spraying device. The structure of the spray liquid collection box is convenient to install the agitator and the pH meter from the upper part. The obtained pH value is adjusted through the pH regulator storage tank, and the reaction effect is better. The tap water inlet pipe, the pH regulator storage tank and the oxidant storage tank are all connected to the top of the spray liquid collection tank, which is convenient to mix evenly in the spray liquid collection tank directly, and the mixed liquid enters the inlet of the circulation pump through the pipeline from the bottom of the tank for circulation .

Another optional improvement is that the photocatalytic reactor is completely or partially replaced by a photocatalytic reaction box, the photocatalytic reaction box includes a box body, and a plurality of UV lamp tubes are inserted in parallel in the box body, and one end of the box body is connected to the wet room. The top gas phase outlet of the French oxidation reaction tower, and the outlet at the other end of the box is connected to the fan inlet; the UV lamp tube is a UV mercury lamp of 185nm-365nm. The UV lamp is easy to purchase, install and use, and the photocatalytic reaction box is simple in structure and easy to operate.

Another optional improvement plan, the oxidant NaClO solution in the oxidant storage tank is replaced by H ₂ O ₂ or Fe/H ₂ O ₂ solution, a row of photolysis ultraviolet lamps is arranged inside the top of the wet oxidation reaction tower, and the photolysis The UV lamp is located below the demister, thus forming a UV/H ₂ O ₂ , UV/Fe/H ₂ O ₂ system. When the oxidant is H ₂ O ₂ solution, the photolysis UV lamp located under the demister can photodecompose the hydrogen peroxide in the oxidant to generate O and OH free radicals, and the O and OH free radicals are in the tower body to be degraded The exhaust gas molecules collide and react to increase the dissociation rate of the target molecules, thereby improving the oxidation efficiency in the wet oxidation reaction tower.

Specifically, all photocatalytic reactors and/or photocatalytic reaction boxes are connected in parallel with multiple sets of devices to expand the amount of waste gas treatment. There is a gap between each set, and multiple sets are uniformly installed in a stainless steel shell to form an integral photocatalytic reaction. module.

In addition, the wet oxidation reaction tower in the present invention is used alone to carry out experimental research on simulated chemical industry organic waste gas. The process is: the exhaust gas from the exhaust gas generator or the exhaust gas storage tank is mixed through the gas mixer, and then further mixed evenly through the gas buffer, and then enters the wet oxidation reaction tower for degradation under the action of the induced draft fan, and the reacted gas passes through the The online gas analyzer detects its concentration, and the degraded gas is discharged through the exhaust pipe.

The degradation flow dynamics of the wet oxidation reaction tower using glass beads as filler simulates chemical organic waste gas (including xylene waste gas). The initial concentration of xylene is 300-1000mg/m ³ and the gas flow rate is 10-50m ³ /h. The method and effect are as follows:

The waste gas containing xylene flows out from the gas outlet of the waste gas generator, and after being mixed with the gas mixer and the buffer, it enters the wet oxidation reaction tower. The gas flow rate is controlled by a flow meter to be 10-50m ³ /h, and the initial concentration of toluene is 300-1000mg/m ³ . After mixing and stirring with other solutions, it is pumped into the top of the tower by a circulation pump and sprayed, and is in countercurrent contact with the gas flowing in from the bottom of the tower, and undergoes a heterogeneous reaction on the surface of the packing.

The online gas analyzer simultaneously detects the concentration of xylene to obtain its removal efficiency. The results show that, with the initial concentration of toluene at 500mg/m ³ , in the UV/Fe/H ₂ O ₂ system, the pH is 3.5, the gas flow rate is 15m ³ /h, the removal rate of xylene is 85.3%, the removal rate is high, and the reaction The effect is good.

In addition, the photocatalytic reactor in the present invention is used alone to conduct experimental research on simulated chemical industry organic waste gas. The process is: the exhaust gas from the exhaust gas generator or the exhaust gas storage tank is mixed through the gas mixer, and then further mixed evenly through the gas buffer, and then enters the photocatalytic reactor for degradation under the action of the induced draft fan, and the reacted gas passes through the online The gas analyzer detects its concentration, and the degraded gas is discharged through the exhaust pipe.

The degradation flow of this scheme dynamically simulates chemical organic waste gas (including xylene waste gas). The initial concentration of xylene is 50-300mg/m ³ , and the gas flow rate is 10-50m ³ /h. The method and effect of degrading waste gas are as follows:

(1) Two kinds of excimer lamps, KrBr and XeBr, are used as light sources, the catalyst is TiO ₂ , and the catalyst is coated.

(2) Exhaust gas containing xylene flows out from the outlet of the exhaust gas generator, mixes with the gas mixer and buffer, and then enters the photocatalytic reactor. The gas flow rate is controlled by a flow meter to be 10-50m ³ /h, and the initial concentration of toluene is 50-300mg/m ₃ . After the concentration is stable, the excimer light source is turned on for photocatalytic degradation.

(3) The online gas analyzer detects the concentration of xylene synchronously, so as to obtain its removal efficiency. The results show that using XeBr excimer lamp, TiO ₂ as catalyst, the initial concentration of xylene is 110mg/m ³ , the gas flow rate is 15m ³ /h, the removal rate of xylene is 72.5%, the removal rate of xylene is higher, and the reaction effect is better it is good.

In order to improve the photolysis efficiency, water vapor can also be introduced into the gas, and the water molecules will be decomposed into ·O and ·OH free radicals under the action of ultraviolet light to improve the photolysis effect.

In addition, the photocatalytic reaction box in the present invention is used alone to conduct experimental research on simulated chemical industry organic waste gas. Using a 14W UV lamp as the excitation light source, through reasonable structural optimization, an operable small-flow complete prototype is designed to simulate the degradation of chemical organic waste gas. The waste gas flow rate is 20-30m ³ /h, the particle concentration is 100mg/m ₃ , and the VOCs concentration is 81.2mg/m ³ . The particles and organic matter are effectively removed. The particle removal rate of the combined device exceeds 85%, and the removal rate of toluene exceeds 50%, the comprehensive removal effect of particulate matter and volatile organic gases is better.

Therefore, the present invention can combine two of the treatment units (such as wet oxidation + photocatalysis or multi-stage filtration + wet oxidation) according to the fluctuation of the exhaust gas flow and properties, and the comprehensive removal effect of particulate matter and volatile organic gases is better.

The beneficial effect of a kind of purification system for the mixture of microparticles and volatile organic gases of the present invention is:

1. The present invention adopts three treatment methods of filtration, chemical absorption oxidation and UV photocatalysis of wet oxidation equipment for synergistic purification, which can avoid the thorough purification of the mixture of microparticles and VOCs by a single filtration, absorption and adsorption method, and single chemical oxidation Inability to efficiently absorb organic volatile gases, single UV photocatalysis has low purification effect on high-concentration organic volatile gases, etc., and can treat a variety of single-use filtration, chemical absorption oxidation or UV photocatalysis (or require a large Energy consumption) exhaust gas can be completely decomposed, which greatly reduces the investment in equipment costs, and has high purification efficiency, small footprint, simple installation and operation, and low operating costs, and two of them can be combined according to the fluctuation of exhaust gas flow and properties Treatment unit (e.g. wet oxidation + photocatalysis or filtration + wet oxidation) use;

2. According to the ultraviolet wavelength corresponding to the maximum ultraviolet absorption cross-section of gaseous pollutant molecules, the present invention can adjust the variable high-voltage power supply, and can also change the low-pressure mixed gas in the gas-filled chamber. The adjustable range of wavelength λ is from 100 to 400nm, so as to obtain different wavelengths of ultraviolet light (vacuum ultraviolet VUV and UV), and also change the type of catalyst, so as to degrade different components and different contents of exhaust gas in a targeted manner, with higher energy utilization rate and better exhaust gas treatment effect Good, the pollutants are effectively purified, and the use is flexible and convenient; no need to use activated carbon adsorption, the purification efficiency is high, the cost is low, and the use is simple;

3. The nitrogen chamber can continuously enter and exit through the nitrogen inlet and nitrogen outlet, which can take away the surface heat of the electrodeless ultraviolet lamp, and at the same time avoid the absorption of ultraviolet light by _O2 in the air, and improve the utilization rate of light;

4. The long-term use of the catalyst will cause failure. The present invention uses the catalyst glass slide as the carrier of the catalyst, which can be replaced regularly and is easy to use;

5. The outer cylinder is a rectangular cylinder, which is convenient for fixing the catalyst slide and is more convenient to use.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a process flow diagram of a purification system for a mixture of microparticles and volatile organic gases of the present invention;

Fig. 2 is a front view of the particle filter after opening the side cover of a purification system for a mixture of microparticles and volatile organic gases of the present invention;

Fig. 3 is a right side view of a deflector of a purification system for a mixture of microparticles and volatile organic gases of the present invention;

Fig. 4 is a wet oxidation process flow chart of the wet oxidation reaction tower of the purification system for the mixture of microparticles and volatile organic gases of the present invention;

Fig. 5 is a kind of full sectional view of the photocatalytic reactor of the purification system of the mixture of microparticles and volatile organic gases of the present invention;

Fig. 6 is a schematic cross-sectional view of a photocatalytic reaction box of a purification system for a mixture of microparticles and volatile organic gases according to the present invention.

Among them: 1. particle filter, 11. deflector, 111. fixed ring, 112. fin plate, 113. fan-shaped channel, 12. first-stage filter material, 13. second-stage filter material, 14. third-stage Filter material; 2. wet oxidation reaction tower, 21. demister, 22. packing layer, 23. spraying device, 24. photolysis ultraviolet lamp, 25. manhole, 26. spray liquid collection box, 27. stirring Device, 28. pH meter, 29. Flow meter; 3. Photocatalytic reaction module, 31. Photocatalytic reactor, 311. Electrodeless ultraviolet lamp, 3111. Internal electrode, 3112. External electrode, 3113. Variable high voltage power supply, 3114 .gas-filled chamber, 312. quartz sleeve, 313. outer cylinder, 314. tube plate, 3141. reaction gas inlet, 3142. reaction gas outlet, 315. catalytic reaction chamber, 316. polytetrafluoroethylene porous ring, 317 .Nitrogen chamber, 318. Catalyst glass slide, 32. Photocatalytic reaction box, 321. Box body, 322. UV lamp; 4. Fan; 5. Flue gas discharge device; 6. pH regulator storage tank; 7. Oxidant storage tank; 8. Tap water inlet pipe; 9. Circulation pump; 10. Waste water outlet pipe.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

As shown in Figures 1-6, a specific embodiment of a purification system for a mixture of microparticles and volatile organic gases of the present invention includes a particulate filter 1, a wet oxidation reaction tower 2, and a pipeline connected in sequence. Photocatalytic reaction module 3, fan 4 and flue gas discharge device 5; Photocatalytic reaction module 3 is the photocatalytic reactor 31 of single photocatalytic reactor 31 or a plurality of parallel settings; Photocatalytic reactor 31 comprises electrodeless ultraviolet lamp 311, Quartz sleeve 312 and outer cylinder 313, electrodeless ultraviolet lamp 311 includes inner electrode 3111, outer electrode 3112 and variable high-voltage power supply 3113, a gas-filled chamber 3114 is provided between the inner electrode 3111 and outer electrode 3112, and the gas-filled chamber 3114 Filled with a mixed gas of inert gas and halogen gas or a mixed gas of inert gas and mercury vapor, the inner electrode 3111 and the outer electrode 3112 are connected to the positive and negative electrodes of the variable high-voltage power supply 3113 in one-to-one correspondence; the quartz sleeve 312 and the outer cylinder The body 313 is sleeved on the electrodeless ultraviolet lamp 311 sequentially from the inside to the outside. The two ends of the quartz sleeve 312 are sleeved with tube plates 314. The outer cylinder 313 is fixed on the quartz sleeve 312 through the tube plate 314. One tube plate 314 There is a reaction gas inlet 3141 on the top, and the reaction gas inlet 3141 pipeline is connected to the gas phase outlet at the top of the wet oxidation reaction tower 2, and the gas phase outlet at the top of the wet oxidation reaction tower 2 is provided with a demister 21, and the wet oxidation reaction tower The gas phase inlet of 2 is located at the bottom of the tower; the other tube plate 314 is provided with a reaction gas outlet 3142, and the reaction gas outlet 3142 pipe is connected to the fan 4 inlet; the outer cylinder 313, the two tube plates 314 and the quartz sleeve 312 form a catalytic The reaction chamber 315; the two ends of the quartz sleeve 312 are fixed with polytetrafluoroethylene porous rings 316, and the two ends of the electrodeless ultraviolet lamp 311 are respectively inserted in the two polytetrafluoroethylene porous rings 316; the quartz sleeve 312. A nitrogen chamber 317 is formed between two polytetrafluoroethylene porous rings 316 and the electrodeless ultraviolet lamp 311; one end of the quartz sleeve 312 is a nitrogen inlet, and the other end of the quartz sleeve 312 is a nitrogen outlet, and the nitrogen inlet and the nitrogen outlet are respectively The through holes on the respective polytetrafluoroethylene porous rings 316 communicate with the nitrogen chamber 317; the outer cylinder 313 is a rectangular cylinder, and each inner wall of the outer cylinder 313 is evenly fixed with a plurality of catalyst slides 318, and the catalyst is loaded The glass slide 318 is uniformly coated with catalyst.

When the purification system of this embodiment is working, the blower 4 is turned on, and the exhaust gas containing particles and volatile organic gases enters through the particle filter 1, and the gas inlet of the wet oxidation reaction tower 2 is located at the bottom and the lowest end of the tower. During the rising process of the gas, the gas reacts cross-flow with the oxidant aqueous solution sprayed on the upper part, the oxidation reaction produces harmless substances, and the waste water generated at the same time enters the bottom of the tower for storage. The gas that absorbs most of the VOCs through the wet oxidation reaction tower 2 is demistered by the demister 21, and then enters the photocatalytic reaction module 3 through the pipeline to further oxidize and purify the organic waste gas. The organic waste gas generated in the photocatalytic reaction module 3 It is directly decomposed under ultraviolet light or oxidized by active free radicals on the surface of the catalyst, and the waste gas after three-stage purification is driven by the fan 4 and enters the flue gas discharge device 5 to be discharged. Among them, the flue gas discharge device 5 is preferably a chimney.

This embodiment adopts the collaborative purification of filtration, chemical absorption oxidation of wet oxidation equipment and UV photocatalysis, which can avoid the thorough purification of the mixture of microparticles and VOCs by a single filtration, absorption and adsorption method, and a single chemical oxidation cannot Efficient absorption of organic volatile gases, single UV photocatalysis has low purification effect on high-concentration organic volatile gases and other defects, and can treat a variety of single-use filtration, chemical absorption oxidation or UV photocatalysis (or require large energy) Consumption) exhaust gas can be completely decomposed, greatly reducing the investment in equipment costs, and it has high purification efficiency, small footprint, simple installation and operation, low operating costs, and can combine two of them according to the fluctuation of exhaust gas flow and properties Units (eg wet oxidation + photocatalysis or filtration + wet oxidation) are used.

In addition, in the photocatalytic reactor 31 in the photocatalytic reaction module 3, after the waste gas after wet oxidation enters the catalytic reaction chamber 315 from the reaction gas inlet 3141, the variable high-voltage power supply 3113 is energized, and the dielectric barrier discharge is used to stimulate light emission. , and use the variable high-voltage power supply 3113 with adjustable discharge voltage and input power to excite the low-pressure mixed gas (rare gas-mercury vapor or rare gas-halogen) discharge between the double-layer medium to generate excimer ultraviolet radiation, and the low-pressure mixed gas Excited and generated excimer ultraviolet light further completely decomposes the volatile organic waste gas in the catalytic reaction chamber 315 outside the quartz sleeve 312, and the harmless gas formed by the decomposition is discharged from the reaction gas outlet 3142, driven by the fan 4, and enters the The flue gas discharge device 5 discharges the volatile organic gases thoroughly, and achieves zero pollution discharge. According to the ultraviolet wavelength corresponding to the maximum ultraviolet absorption cross-section that mainly removes gaseous pollutant molecules, this embodiment can adjust the variable high-voltage power supply 3113, and can also change the low-pressure mixed gas in the gas filling chamber 3114. The adjustable range of wavelength λ is 100 ~400nm, so as to obtain ultraviolet light of different wavelengths (vacuum ultraviolet VUV and UV), and also change the type of catalyst, so as to degrade different components and different contents of exhaust gas in a targeted manner, with higher energy utilization efficiency and exhaust gas treatment The effect is good, the pollutants are effectively purified, and the use is flexible and convenient.

Among them, the nitrogen chamber 317 can continuously enter and exit through the nitrogen inlet and nitrogen outlet, which can take away the surface heat of the electrodeless ultraviolet lamp 311, avoid the absorption of ultraviolet light by _O2 in the air, and improve the utilization rate of light.

In addition, the catalyst will become invalid after long-term use. In this embodiment, the catalyst slide glass 318 is used as the carrier of the catalyst, which can be replaced regularly and is convenient to use. In addition, the outer cylinder 313 is a rectangular cylinder, which is convenient for fixing the catalyst glass slide 318 and is more convenient to use.

Specifically, the outer surface of the quartz sleeve 312 is evenly coated with a catalyst, which further improves the catalytic effect. In addition, when the catalyst fails, it can also be wiped and reapplied with a new catalyst, which is convenient to use.

Preferably, the catalyst is pure TiO ₂ , molecular sieve, activated alumina or TiO ₂ doped with non-metal elements; more preferably, the catalyst is TiO ₂ doped with graphene.

Specifically, a deflector 11 is provided at the exhaust gas inlet of the particle filter 1, and the deflector 11 is concentrically provided with a plurality of fixed rings 111, and any two adjacent fixed rings 111 are uniformly distributed and radiated by multiple circumferences. The fins 112 arranged in a shape are divided into a plurality of fan-shaped channels 113 . This structure facilitates the uniform distribution of exhaust gas and guides it into the filter channel of the particle filter 1 .

Further, in the direction from the inlet to the outlet of the particulate filter 1, a first-stage filter material 12, a second-stage filter material 13, and a third-stage filter material 14 are sequentially arranged in the filter channel of the particulate filter 1. The filter material 12 is a plurality of filter plates arranged in parallel, gaps are provided between any adjacent two filter plates, and filter holes are evenly distributed on each filter plate; The pore size of the filter holes of the plate decreases gradually, and the density of the filter holes of the filter plate increases; the second-stage filter material 13 is glass wool, and the third-stage filter material 14 is a plurality of stacked filter papers. The three-stage filter material of this embodiment can be installed on a detachable porous support, and the resistance when the filter material is filled ensures that the gas passes as low as possible; in addition, as shown in Figure 2, one side of the housing of the particle filter 1 can be provided Multiple installation holes for easy installation of three-stage filter materials, which are sealed with flange covers after installation; the filter aperture and filter gap width of the multi-stage series filter structure are gradually reduced, which realizes the hierarchical filtration and purification of exhaust gas and increases the filtration capacity. The area enhances the filtering effect, thereby improving the removal rate of micro particles.

Further, the pH regulator inlet pipeline of the wet oxidation reaction tower 2 is connected to the pH regulator storage tank 6, the oxidant inlet pipeline of the wet oxidation reaction tower 2 is connected to the oxidant storage tank 7, and the wet oxidation reaction tower 2 is connected to tap water Inlet pipe 8; demisters 21 and multiple packing layers 22 are installed sequentially from bottom to top in wet oxidation reaction tower 2, and spraying devices 23 are arranged above each packing layer 22, and the inlets of each spraying device 23 are connected through pipelines To the circulating pump 9, the inlet pipe of the circulating pump 9 is connected to the bottom of the wet oxidation reaction tower 2, and the bottom of the wet oxidation reaction tower 2 is connected to a waste water outlet pipe 10, and the gas phase inlet of the wet oxidation reaction tower 2 is located at the lower end Below the packing layer 22; the oxidizing agent in the oxidizing agent storage tank 7 is NaClO with strong oxidizing property. The wet oxidation reaction tower 2 can be equipped with at least one set of spraying devices 23 and demisters 21. The wet oxidation reaction tower 2 is equipped with a nozzle to evenly spray the oxidation absorption liquid on the packing. When the waste gas passes through the packing, the waste gas and oxidation absorption are increased. The liquid contact area increases the absorption efficiency. The wet oxidation reaction tower 2 of this embodiment is a heterogeneous reaction tower, and a packing layer 22 is installed in the tower through supports such as grids, and the filler in the packing layer 22 is preferably glass beads. When the organic gas in the exhaust gas passes through the packed tower from bottom to top, it contacts with the oxidant sprayed on the top in cross-flow, and undergoes a heterogeneous reaction on the surface of the packing, so as to realize the efficient degradation of VOCs. The degraded gas passes through the defoaming at the top of the tower. After the water is removed by the device 21, it enters the next processing unit. The sprayed oxidant is sprayed down through the spraying device 23 at a certain flow rate by the circulation pump 9, and is discharged through the waste water outlet pipe 10 after being saturated for many times, and fresh oxidant is replenished from the oxidant storage tank 7. The oxidant used is NaClO, and the treatment effect is good. If necessary, the pH adjuster storage tank 6 can be used to adjust the pH in the wet oxidation reaction tower 2 .

Further, the pH adjuster storage tank 6 is a sulfuric acid storage tank or a sodium hydroxide storage tank, which can be used for acid-base adjustment.

Further, above each packing layer 22, a manhole 25 is provided on the side wall of the wet oxidation reaction tower 2 for easy installation and maintenance; the bottom of the wet oxidation reaction tower 2 protrudes to one side and communicates with a The spray liquid collection box 26, the top of the spray liquid collection box 26 is provided with the agitator 27 and the pH meter 28 extending to the bottom of the case, and the tap water inlet pipe 8, the pH regulator storage tank 6 and the oxidant storage tank 7 are all connected to The top of the spray liquid collection box 26 and the inlet pipeline of the circulation pump 9 are connected to the bottom of the spray liquid collection box 26 , and a flow meter 29 is arranged in the pipeline between the circulation pump 9 and the inlet of the spraying device 23 . The structure of the spray liquid collection box 26 is convenient to install the agitator 27 and the pH meter 28 from the upper part, the installation is convenient, and the concentration is uniform after stirring; the circulating pump 9 can also be adjusted according to the flow rate of the flow meter 29, so that the spraying effect of the spraying device 23 is better; The pH value measured by the pH meter 28 can also be adjusted through the pH regulator storage tank 6, so that the reaction effect is better. The tap water inlet pipe 8, the pH regulator storage tank 6 and the oxidant storage tank 7 are all connected to the top of the spray liquid collection tank 26, which is convenient to mix evenly in the spray liquid collection tank 26 directly, and the mixed liquid enters the circulation through the pipeline from the bottom of the tank. The inlet of pump 9 is circulated.

In another optional improvement, the photocatalytic reactor 31 is replaced in whole or in part by a photocatalytic reaction box 32, the photocatalytic reaction box 32 includes a box body 321, and a plurality of UV lamp tubes 322 are inserted in parallel in the box body 321, and the box body One end of the body 321 has an inlet connected to the top gas phase outlet of the wet oxidation reaction tower 2, and the other end of the box 321 has an outlet connected to the fan 4 inlet; the UV lamp 322 is a UV mercury lamp of 185nm-365nm. The UV lamp tube 322 is convenient to purchase, install and use, and the photocatalytic reaction box 32 is simple in structure and easy to operate.

In another optional modification, the oxidant NaClO solution in the oxidant storage tank ₇ is replaced by H2O2 or Fe/ _H2O2 solution, and a row of photolysis ultraviolet lamps ₂₄ is arranged inside the top of the wet oxidation reaction tower ₂ , the photolytic ultraviolet lamp 24 is located below the demister 21, thus forming a UV/H ₂ O ₂ , UV/Fe/H ₂ O ₂ system. When the oxidizing agent is H ₂ O ₂ solution, the photolysis ultraviolet lamp 24 positioned under the demister 21 can photodecompose the hydrogen peroxide in the oxidizing agent to generate O and OH free radicals, and O and OH free radicals are in the tower body with The molecules of the waste gas to be degraded collide and react to increase the dissociation rate of target molecules, thereby increasing the oxidation efficiency in the wet oxidation reaction tower 2 .

Specifically, all photocatalytic reactors 31 and/or photocatalytic reaction boxes 32 are connected in parallel with multiple sets of devices to expand the amount of waste gas treatment, with gaps between each set, and multiple sets are uniformly installed in a stainless steel shell to form an integral photo Catalytic Reaction Module 3.

In addition, the wet oxidation reaction tower 2 of the present invention is used alone to conduct experimental research on simulated chemical organic waste gas. The process is: the exhaust gas from the exhaust gas generator or the exhaust gas storage tank is mixed by the gas mixer, and then further mixed evenly by the gas buffer, and then enters the wet oxidation reaction tower 2 for degradation under the action of the induced draft fan, and the reacted gas The concentration is detected by an online gas analyzer, and the degraded gas is discharged through the exhaust pipe.

Wet oxidation reaction tower ² using glass beads as fillers dynamically simulates chemical organic waste gas (including xylene waste gas ⁾ . The method and effect are as follows:

The xylene-containing waste gas flows out from the gas outlet of the waste gas generator, and enters the wet oxidation reaction tower 2 after being mixed with a gas mixer and a buffer. The gas flow rate is controlled by a flow meter to be 10-50m ³ /h, and the initial concentration of toluene is 300-1000mg/m ³ . After the concentration is stable, use a pump to pump the oxidant with a certain concentration from the top of the spray liquid collection tank 26 from the oxidant storage tank 7. After entering and mixing with other solutions, it is pumped into the top of the tower through the circulation pump 9 and sprayed, and it is in countercurrent contact with the gas flowing in from the bottom of the tower, and a heterogeneous reaction occurs on the surface of the filler.

The online gas analyzer simultaneously detects the concentration of xylene to obtain its removal efficiency. The results show that, with the initial concentration of toluene at 500mg/m ³ , in the UV/Fe/H ₂ O ₂ system, the pH is 3.5, the gas flow rate is 15m ³ /h, the removal rate of xylene is 85.3%, the removal rate is high, and the reaction The effect is good.

In addition, the photocatalytic reactor 31 in the present invention is used alone to conduct experimental research on simulated chemical industry organic waste gas. The process is: the exhaust gas from the exhaust gas generator or the exhaust gas storage tank is mixed through the gas mixer, and then further mixed evenly through the gas buffer, and then enters the photocatalytic reactor 31 for degradation under the action of the induced draft fan, and the reacted gas passes through the The online gas analyzer detects its concentration, and the degraded gas is discharged through the exhaust pipe.

The degradation flow of this scheme dynamically simulates chemical organic waste gas (including xylene waste gas). The initial concentration of xylene is 50-300mg/m ³ , and the gas flow rate is 10-50m ³ /h. The method and effect of degrading waste gas are as follows:

(1) Two kinds of excimer lamps, KrBr and XeBr, are used as light sources, the catalyst is TiO ₂ , and the catalyst is coated.

(2) Waste gas containing xylene flows out from the gas outlet of the waste gas generator, and enters the photocatalytic reactor 31 after being mixed by the gas mixer and the buffer. The gas flow rate is controlled by a flow meter to be 10-50m ³ /h, and the initial concentration of toluene is 50-300mg/m ₃ . After the concentration is stable, the excimer light source is turned on for photocatalytic degradation.

(3) The online gas analyzer detects the concentration of xylene synchronously, so as to obtain its removal efficiency. The results show that using XeBr excimer lamp, TiO ₂ as catalyst, the initial concentration of xylene is 110mg/m ³ , the gas flow rate is 15m ³ /h, the removal rate of xylene is 72.5%, the removal rate of xylene is higher, and the reaction effect is better it is good.

In order to improve the photolysis efficiency, water vapor can also be introduced into the gas, and the water molecules will be decomposed into ·O and ·OH free radicals under the action of ultraviolet light to improve the photolysis effect.

In addition, the photocatalytic reaction box 32 in the present invention is used alone to conduct experimental research on simulated chemical industry organic waste gas. Using a 14W UV lamp as the excitation light source, through reasonable structural optimization, an operable small-flow complete prototype is designed to simulate the degradation of chemical organic waste gas. The waste gas flow rate is 20-30m ³ /h, the particle concentration is 100mg/m ₃ , and the VOCs concentration is 81.2mg/m ³ . The particles and organic matter are effectively removed. The particle removal rate of the combined device exceeds 85%, and the removal rate of toluene exceeds 50%, the comprehensive removal effect of particulate matter and volatile organic gases is better.

Therefore, this embodiment can combine two of the treatment units (such as wet oxidation + photocatalysis or multi-stage filtration + wet oxidation) according to the fluctuation of the exhaust gas flow and properties, and the comprehensive removal effect of particulate matter and volatile organic gases is better. .

It should be understood that the specific embodiments described above are only used to explain the present invention, not to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims (10)

1. A kind of 1. cleaning system for microparticle and the mixture of volatile organic gases, it is characterised in that：Including managing successively Particulate filter (1), wet oxidation reaction tower (2), light-catalyzed reaction module (3), wind turbine (4) and the flue gas emission of road connection Device (5)；The light-catalyzed reaction module (3) is single photo catalysis reactor (31) or multiple light-catalyzed reactions being arranged in parallel Device (31)；The photo catalysis reactor (31) includes electrodeless ultraviolet lamp (311), quartz socket tube (312) and outer barrel (313), institute Stating electrodeless ultraviolet lamp (311) includes interior electrode (3111), external electrode (3112) and variable high voltage supplies (3113), the interior electrode (3111) gas-filled chamber (3114) is equipped between external electrode (3112), the gas-filled chamber (3114) is interior filled with indifferent gas The mixed gas or inert gas of body and halogen gas and the mixed gas of mercuryvapour, the interior electrode (3111) and external electrode (3112) positive and negative anodes of variable high voltage supplies (3113) are connected to correspondingly；The quartz socket tube (312) and outer barrel (313) it is sheathed on successively from inside to outside on electrodeless ultraviolet lamp (311), the both ends outer cover of the quartz socket tube (312) is equipped with pipe Plate (314), the outer barrel (313) are fixed on quartz socket tube (312) by tube sheet (314), and a tube sheet (314) is equipped with Reaction gas inlet (3141), the top gaseous phase outlet of reaction gas inlet (3141) the pipeline connection wet oxidation reaction tower (2), The top gaseous phase exit of the wet oxidation reaction tower (2) is equipped with demister (21), the gas of the wet oxidation reaction tower (2) Phase import is located at bottom of towe；Another tube sheet (314) is equipped with reaction gas outlet (3142), and the reaction gas exports (3142) pipeline Connect wind turbine (4) import；Catalytic reaction is formed between the outer barrel (313), two tube sheets (314) and quartz socket tube (312) Chamber (315)；Polytetrafluoroethylstephanoporate stephanoporate ring (316), the electrodeless ultraviolet lamp are fixed with inside the both ends of the quartz socket tube (312) (311) both ends are arranged in two polytetrafluoroethylstephanoporate stephanoporate rings (316) correspondingly；The quartz socket tube (312), two Nitrogen chamber (317) is formed between polytetrafluoroethylstephanoporate stephanoporate ring (316) and electrodeless ultraviolet lamp (311)；The quartz socket tube (312) One end is nitrogen inlet, and the other end of the quartz socket tube (312) is nitrogen outlet, the nitrogen inlet and nitrogen outlet difference Nitrogen chamber (317) is connected by the through hole on respective polytetrafluoroethylstephanoporate stephanoporate ring (316)；The outer barrel (313) is rectangle Cylinder, multiple catalyst glass slides (318) are uniformly fixed with each inner wall of the outer barrel (313), and the catalyst carries Uniformly catalyst is coated with slide (318).
2. 2. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 1, its It is characterized in that：Quartz socket tube (312) outer surface is uniformly coated with catalyst.
3. 3. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 1 or 2, It is characterized in that：The catalyst is pure TiO₂, molecular sieve, activated alumina or or doping nonmetalloid TiO₂。
4. 4. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 1, its It is characterized in that：Air deflector (11) is equipped with the exhaust gas inlet of the particulate filter (1), the air deflector (11) is arranged concentrically There are multiple retainer rings (111), arrange by multiple circumference uniform distributions and radially between two retainer rings (111) of arbitrary neighborhood Wing plate (112) is separated into multiple sector channels (113).
5. A kind of 5. purification system for microparticle and the mixture of volatile organic gases according to claim 1,2 or 4 System, it is characterised in that：On from the import of particulate filter (1) toward export direction, the filtering of the particulate filter (1) is led to It is disposed with first order filtering material (12), second level filtering material (13) and third level filtering material (14) in road, first Level filtering material (12) is the filter plate that polylith is arranged in parallel, and gap, every piece of mistake are equipped between two filter plates of arbitrary neighborhood Filter hole is evenly equipped with filter plate；On from the import of particulate filter (1) toward export direction, the hole of the filter hole of the filter plate Footpath is successively decreased, and the density of the filter hole of the filter plate is incremented by；Second level filtering material (13) is mineral wool, and third level material is more Open the filter paper being stacked.
6. 6. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 1, its It is characterized in that：The pH adjusting agent inlet pipeline of the wet oxidation reaction tower (2) is connected to pH adjusting agent storage tank (6), described wet The oxidant inlet pipeline of method oxidation reaction tower (2) is connected to oxidant storage tank (7), wet oxidation reaction tower (2) connection There is running water inlet pipe (8)；Demister (21) and multiple fillers are installed successively from the bottom up in the wet oxidation reaction tower (2) Layer (22), each packing layer (22) top are both provided with flusher (23), and the import of each flusher (23) is connected by pipeline Circulating pump (9) is passed to, the inlet pipeline of the circulating pump (9) is connected to the bottom of towe of wet oxidation reaction tower (2), and wet oxidation is anti- The bottom of towe of tower (2) is answered to be communicated with wastewater outlet pipe (10), the gas phase import of the wet oxidation reaction tower (2) is located at filling out for lower end The lower section of the bed of material (22)；Oxidant in the oxidant storage tank (7) is NaClO.
7. 7. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 6, its It is characterized in that：The pH adjusting agent storage tank (6) is sulfuric acid storage tank or sodium hydroxide storage tank.
8. 8. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 6 or 7, It is characterized in that：Manhole is offered on the top of each layer of packing layer (22), the side wall of the wet oxidation reaction tower (2) (25)；The bottom of towe of the wet oxidation reaction tower (2) is raised to side and is communicated with spray liquid collecting box (26), the spray liquid The case top of collecting box (26) is equipped with the interior blender (27) and pH meter (28) for extending bottom, the running water inlet pipe (8), pH tune Section agent storage tank (6) and oxidant storage tank (7) are connected to the case top of spray liquid collecting box (26), the import of the circulating pump (9) Pipeline is communicated in the bottom of spray liquid collecting box (26), the pipeline between the circulating pump (9) and the import of flusher (23) In be equipped with flowmeter (29).
9. 9. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 1, its It is characterized in that：The photo catalysis reactor (31) completely or partially replaces with light-catalyzed reaction case (32), the light-catalyzed reaction Case (32) includes babinet (321), parallel in the babinet (321) to be inserted with more UV lamp pipes (322), the babinet (321) The top gas phase outlet of one end inlet communication wet oxidation reaction tower (2), the other end outlet wind turbine of the babinet (321) (4) import；The UV lamp pipe (322) is the UV mercury vapor lamps of 185nm-365nm.
10. 10. a kind of cleaning system for microparticle and the mixture of volatile organic gases according to claim 6, its It is characterized in that：Oxidant NaClO solution in the oxidant storage tank (7) replaces with H₂O₂Or Fe/H₂O₂Solution, the wet method The tower top of oxidation reaction tower (2) is internally provided with row's photodissociation ultraviolet lamp (24), and the photodissociation ultraviolet lamp (24) is located at demister (21) lower section.