CN206315678U

CN206315678U - A kind of photocatalysis VOC processing units

Info

Publication number: CN206315678U
Application number: CN201621440509.9U
Authority: CN
Inventors: 胡家富; 杜宇
Original assignee: Nanjing Hehai Environmental Research Institute Co Ltd
Current assignee: Nanjing Hehai Environmental Research Institute Co Ltd
Priority date: 2016-12-23
Filing date: 2016-12-23
Publication date: 2017-07-11
Anticipated expiration: 2026-12-23

Abstract

The utility model provides a kind of photocatalysis VOC processing units, and the device is ultraviolet using microwave-excitation, including microwave generator, resonator, electrodeless ultraviolet transmitting fluorescent tube, the ceramic honey comb for carrying catalyst, other pipe, intake valve and fan blower fan.The utility model is related to a kind of emission-control equipment.Technological difficulties：1. old technology is difficult to equilibrium catalyst carrying, sphere of action and catalyst stimulation efficiency this three.2. microwave and ultraviolet dual independently-powered, causes a large amount of microwaves to flog a dead horse, high energy consumption.Solution：1. carrying catalyst using ceramic honey comb, by sintering of catalyst in ceramic surface, catalyst carrier is solved the problems, such as.And alveolate texture ensure that enough active areas.2. being excited using microwave resonance ultraviolet, microwave field density more than needed is rationally make use of, the power supply of ultraviolet emission fluorescent tube is eliminated, the purpose of energy-conservation is reached.The photocatalysis VOC processing units of blocking design, are that the varying strength demands such as green production, workshop exhaust deodorization and use provide possibility.

Description

A kind of photocatalysis VOC processing units

Technical field

The utility model belongs to clearer production technology field, is related to a kind of VOC processing units, more particularly to a kind of photocatalysis VOC processing units.

Background technology

With industrial boom, and history planning problem and the high speed development of urbanization process, part industrial enterprise Generate obvious negative effect, especially foul smell to the lives of nearby residents to disturb residents problem, these foul smell more than 90% are all Volatile organic waste gas, the health and safety of the serious threat mankind, also influences the image of industrial park, city or even country.Cause This, VOC processing seems more important also more urgent in three dirts.VOC harmful components mainly include NMHC, ester, alcohol, The organic matter NMHC such as ether, the organic matter such as ester, alcohol, ether.This kind of waste gas is handled to set about from several methods, such as spray washing, Absorption, ozone, photocatalyst method etc..But be the cost of consumption and the regeneration of sorbing material, photocatalyst method the problem of absorption method Need to ensure catalyst activity and continue to provide light source, ozone rule needs constantly to provide energy production ozone or directly consumes smelly Oxygen, spray washing is needed to washes after-treatment, and these methods have its limitation.

Photocatalyst principle is ultraviolet light activated catalyst such as TiO₂, when energy is more than or equal to semiconductor band gap Light wave (hv) the radiation TiO of energy₂When, TiO₂It is excited on conduction band (CB), makes after Electron absorption luminous energy (hv) in valence band (VB) Excitation state electronics (e-) is produced on conduction band, and positively charged hole (h+) is produced in valence band (VB).E- is with absorption in TiO₂ O on particle surface₂Generation reduction reaction, generates O₂-, O₂- further react generation H with H+₂O₂, and h+ and H₂O, OH- occur Oxidation reaction generates high activity .OH, H₂O₂,-OH absorption in TiO₂Organic pollution (referred to as R) on surface is degraded to CO₂、H₂O etc., harmless object is aoxidized or is reduced to poisonous and hazardous pollutant.

Photochemical catalyst itself is very easy to be lost in air-flow because its state is powdered, easily cause failure of apparatus and Addition catalyst is needed so that operating cost is substantially increased.Carried with membrane material, for example tunica fibrosa, although its activation efficiency and have Imitate active area all good, but its load bearing process complex process, and easily pickup, clean high cost.

The microwave of some current comprehensive utilizations and ultraviolet gas treatment equipment are mostly under test, these equipment The problem of obvious energy consumption is excessive is there is in actual applications.In such as patent CN 1101257C and CN103977678A, if Standby light source and microwave source is independently powered, and a large amount of microwaves flog a dead horse after field intensity is provided, and waste substantial amounts of electric energy.

Utility model content

Problem to be solved in the utility model is the reduction on the premise of ensureing or even improving photocatalysis VOC treatment effeciencies The overall power of the total amount of microwave idle work in device, reduction light source and microwave source so that the high and low energy of device overall treatment efficiency Consumption, operation cost it is low, realize under various circumstances can for a long time and handle VCO incessantly, reduce environmental pollution.

In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：Photocatalysis VOC processing units, Including following part：

Module occurs for microwave, includes microwave generator (2.45GHz), transformation power supply module；

Resonator, is made up of the stainless steel plate of smearing polytetrafluoroethylene (PTFE), hermatic door；

Electrodeless ultraviolet transmitting fluorescent tube (main launch wavelength 254nm)；

Ceramic honey comb, sinters TiO thereon₂Catalyst；

Fan, keeps internal blast, flows inter-process gas single direction；

Circulation is other to manage, and using the other pipe with fan, is connected to front end from resonator end, utilizes fan forced circulation.

Wherein：

Fan blower fan is each at the other pipe and air inlet to install one.

Intra resonant cavity is provided with ceramic honey comb and electrodeless ultraviolet transmitting fluorescent tube, ceramic honey comb and electrodeless ultraviolet hair Shot-light is fixed on intra resonant cavity by fixed mount；There is constant spacing between ceramic honey comb, ceramic honey comb inner surface is held Carried photocatalyst.Electrodeless ultraviolet launches fluorescent tube, and every two are fixed on intra resonant cavity each pair ceramic honey comb by fixed mount Centre, it is symmetrical above and below.Every two electrodeless ultraviolet transmitting fluorescent tubes are fixedly installed on honeycomb described in each pair by fixed mount and made pottery The centre of porcelain.

TiO is used as a result of opaque ceramic honey comb₂Loading material, be designed to the lattice of a lattice one in resonator Similar cabin series connection processing unit, have an electrodeless ultraviolet transmitting fluorescent tube in each unit, between unit and unit, make With the ceramic honey comb of 2cm thickness as cell isolation layer, due to relatively thin thickness, and each unit has ultraviolet emission lamp pipe Irradiation, ceramic honey comb two sides is all irradiated, therefore the TiO of sintering thereon₂Exciting for ultraviolet can be fully obtained, therefore sinters it On TiO₂Exciting for ultraviolet can fully be obtained.Alveolate texture ensure that enough active areas simultaneously, effective flat The catalyst action scope that weighed and catalyst stimulation efficiency.

Intra resonant cavity is provided with microwave generator, and microwave generator passes through circuit with being arranged on the control panel of device external Connection, control panel controls the switch of the microwave generator；Other pipe is arranged at outlet pipe and is communicated to the intake valve Behind the door.

The ultra-violet light-emitting energy source of electrodeless ultraviolet transmitting fluorescent tube is the microwave that the microwave generator is sent.Electrodeless purple Outside line transmitting fluorescent tube is the electrodeless ultraviolet emission pipe that main wavelength is 254nm；Microwave generator working frequency is 2.45GHz, type Including and be not limited to microwave magnetron.

Compared with prior art, the beneficial effects of the utility model are：

1. the internal structure of blocking, it is ensured that increase/reduction unit number can be passed through according to processing VOC load differences Amount, easily changes specified processing load；

2. because being, containing other pipe forced circulation, to have changed required unit number small, reduced while guarantee treatment effect The design size of device, effectively reduces the cost and processing cost of device；

3. because be blocking internal structure, and the object in resonator does not have positive and negative specificity, and the later stage of device is tieed up Shield difficulty is reduced, and being prevented effectively from a certain parts damages of appearance causes whole device invalid, and the service life of device is carried Height, so as to effectively reduce the operation cost of user；

4.2.45GHz the ultraviolet emission lamp pipe generation that microwave easily enters easily resonance 254nm after resonator is ultraviolet Light, it maintains the energy consumption of resonance low, the microwave of the redundancy of activated catalyst and the ultraviolet ability that also there is catalysis VOC to decompose, together Sample has reached the purpose for decomposing VOC, device is had the characteristics of capacity usage ratio is high., reduce useless energy ezpenditure；

5. carrying catalyst using ceramic honey comb, by sintering of catalyst in ceramic surface, catalyst attrition is solved too fast The problem of.It is 2cm to design ceramic thickness simultaneously, due to relatively thin thickness, and each unit has the irradiation of ultraviolet emission lamp pipe, Ceramic honey comb two sides is all irradiated, therefore the TiO of sintering thereon₂Exciting for ultraviolet can be fully obtained, while cellular knot Structure ensure that enough active areas, effectively balance catalyst action scope and catalyst stimulation efficiency.

In addition, carrying the catalyst TiO of processing by ceramic honey comb₀, it is low that it cleans difficulty, in routine use or even clear All not easily runed off during washing.

6. wherein, resonator is using stainless steel plate and smear the reinforcing of polytetrafluoroethylene (PTFE), with extremely excellent anti- Etching characteristic, anti-stain characteristic is good, and more can easily clean, and safeguards simple, durability is strong.In addition, blocking and The design of hermatic door, easy to clean, even if device is when needing post depth to safeguard, maintenance difficulties are also extremely low.Inwall is smeared poly- The resonator of tetrafluoroethene also has corrosion resistance, and closed structure makes the microwave of escape and ultraviolet total amount meet national related mark It is accurate.

In summary 6 points, the device is processed as target with efficient, low energy consumption, green, and each energy conversion link is unnecessary Energy all accomplished there is a positive role to degraded VOC as far as possible, effective activated catalyst improves treatment effeciency, and causes Capacity usage ratio is high to reduce energy consumption, and itself loss to catalyst is small to save material consumption, and the device is in the same of degraded VOC Shi Zisheng does not cause harm to environment.

Brief description of the drawings：

Fig. 1, device of the present utility model front view；

Fig. 2, the utility model device top view；

Fig. 3, the utility model device cut open figure.

In Fig. 1,1, ceramic honey comb；2nd, fluorescent tube；3rd, fan/ventilation pump.

In Fig. 2,1, microwave generator；2nd, fan/ventilation pump.

In Fig. 3,1, ceramic honey comb；2nd, fluorescent tube；3rd, fan/ventilation pump.

Embodiment

In order to deepen to understand of the present utility model, the utility model is done further below in conjunction with drawings and Examples It is described in detail, the embodiment is only used for explaining the utility model, protection domain of the present utility model is not constituted and limited.This reality A kind of photocatalysis VOC processing units are provided with new, the component is launched by resonator, microwave generating assembly, electrodeless ultraviolet Fluorescent tube, ceramic honey comb (containing catalyst), other pipe, fan composition, internal element, the small volume of individual unit.

In order to overcome the problem of existing microwave ultraviolet photocatalysis technology repeats to consume energy, the utility model is utilized and rationally make use of Resonator, electrodeless ultraviolet transmitting fluorescent tube is placed directly within resonator as light source, microwave frequency 2.45GHz and ultraviolet is utilized Line transmitting fluorescent tube dominant wavelength 254nm resonance point bright light pipe, so that the fully effective fluorescent tube that saves produces ultraviolet operation cost, The purpose of energy-conservation is accomplished.

As shown in Figure 1, Figure 2, Figure 3 shows, device is by microwave generation portion part, resonance for interior view and exterior view of the present utility model Chamber, electrodeless ultraviolet transmitting fluorescent tube, the ceramic honey comb for carrying catalyst, other pipe, intake valve and the part group of fan blower fan six Into as shown in Figure 1.Inside uses ceramic honey comb as dividing elements, each two ceramic honey comb spacing 45mm-75mm.Each two Ceramic honey comb centre position sets two electrodeless ultraviolets to launch fluorescent tube and presents down symmetrical.Every 2n-1 from air inlet Microwave generating apparatus is set up on ceramic honey comb, it is ensured that the microwave field density of each unit can succeed resonance electrodeless ultraviolet emission lamp Pipe.Comprehensive Design changing unit size and number can be met according to required processing air inflow and processing.

Ceramic honey comb should use 1-2mm apertures, its alveolate texture and sufficiently small aperture ensure that pending air-flow During by processing unit, effective contact area with catalyst.15-30mm thickness should be used simultaneously, due to honeybee The aperture of nest ceramics is then much larger than dominant wavelength 254nm totally 3 orders of magnitude of uviol lamp, and thickness is also relatively thin, it is ensured that it is ultraviolet can be with Effectively penetrate, also ensure that ultraviolet light and the intensity of diffraction.

A diameter of 20~30mm of other pipe, its forced refluence air quantity is adjusted by rotation speed of the fan.

Gas output passes through intake valve and forced refluence air quantity comprehensive adjustment.

The catalyst of ceramic honey comb carrying is TiO₂Class catalyst, can be used pure TiO₂Or modified TiO₂Catalyst, such as SO₄ ^2-/TiO₂Super-strong acidified titanium dioxide optical catalyst etc..

Simultaneously as the characteristics of its blocking is designed, the device is designed to different lengths, different disposal need are met The unit number and size asked, it is convenient to be customized according to plant requirements, be the varying strength demands such as green production, workshop exhaust deodorization and Using there is provided possible.

Embodiment 1

The high * of the long * of main body of experimental provision are wide：800*400mm*400mm, wherein resonator size are that the high * of long * are wide： 800*300mm*400mm.Internal cellular ceramics are using 20mm thickness, each two ceramic honey comb spacing 60mm.Ceramic honey comb is held The catalyst of load is SO₄ ^2-/TiO₂Super-strong acidified titanium dioxide optical catalyst.Other pipe diameter is 25mm.

Open other pipe forced circulation (air quantity 60CFM), 0.20m³0.05% ethylene gas, in 10 minutes clearing up rate reaches To 62%.

Claims

1. a kind of photocatalysis VOC processing units, it is characterised in that photocatalysis VOC devices include microwave generator, resonator, Electrodeless ultraviolet transmitting fluorescent tube, the ceramic honey comb for carrying catalyst, other pipe, intake valve and fan blower fan, the fan blower fan It is each at the other pipe and air inlet to install one；The intra resonant cavity is provided with ceramic honey comb and electrodeless ultraviolet emission lamp Pipe, ceramic honey comb and the electrodeless ultraviolet emission lamp is fixed on intra resonant cavity by fixed mount；The ceramic honey comb Inner surface carries photochemical catalyst；Intra resonant cavity is provided with microwave generator, and the microwave generator is with being arranged on device external Control panel is connected by circuit, and the control panel controls the switch of the microwave generator；The other pipe is arranged on outlet At pipeline and it is communicated to after the air intake valve.

2. photocatalysis VOC processing units as claimed in claim 1, it is characterised in that the electrodeless ultraviolet transmitting fluorescent tube Ultra-violet light-emitting energy source is the microwave that the microwave generator is sent.

3. photocatalysis VOC processing units as claimed in claim 2, it is characterised in that the electrodeless ultraviolet launches fluorescent tube and is Dominant wavelength is 254nm electrodeless ultraviolet emission pipe.

4. photocatalysis VOC processing units as claimed in claim 2, it is characterised in that the microwave generator working frequency is 2.45GHz。

5. photocatalysis VOC processing units as claimed in claim 1, it is characterised in that the ceramic honey comb is solid by fixed mount Being scheduled between intra resonant cavity, ceramic honey comb has constant spacing, and spacing range is 45mm-75mm.

6. photocatalysis VOC processing units as claimed in claim 1, it is characterised in that the electrodeless ultraviolet launches fluorescent tube, often Two intra resonant cavity each pair ceramic honey comb is fixed on by fixed mount centre, it is symmetrical above and below.Every two described without extreme ultraviolet Line transmitting fluorescent tube is fixedly installed on the centre of ceramic honey comb described in each pair by fixed mount.

7. photocatalysis VOC processing units as claimed in claim 6, it is characterised in that the photochemical catalyst is titanium dioxide class Photochemical catalyst.

8. photocatalysis VOC processing units as claimed in claim 1, it is characterised in that a diameter of 20~30mm of the other pipe.

9. photocatalysis VOC processing units as claimed in claim 1, it is characterised in that described ceramic honey comb pore diameter range exists 1-2mm, thickness range is in 15-30mm.