CN209378621U - System for cleaning fume - Google Patents

Abstract

System for cleaning fume, the dust-filtering array made of heat exchanger, hollow-fibre membrane and its component, scrubbing tower, low-altitude discharged mouth form；Its technical process is: being adjusted the flue-gas temperature that upstream combustion link is sent to 40--80 DEG C with heat exchanger, later, the dust catching in flue gas is filtered with the filter array that hollow-fibre membrane and its component form, its concentration is reduced under 1-30ug/m3, later, the flue gas after dedirt is sent into scrubbing tower absorption processing again, especially with ultraviolet light+oxidant+hollow-fibre membrane aeration method, it aoxidizes, wash in stuffing washing tower, it removes, the gaseous substance in recovered flue gas, later, atmospheric environment is discharged into through low latitude exhaust port.The utility model can by flue gas dust pollution object and gas pollutant processing to better than ATMOSPHERICAL BACKGROUND environment level；Resource object that can preferably in recovered flue gas.

Description

System for cleaning fume

Fields

The present invention relates to a kind of system for cleaning fume.

Background technique

The flue gas refers to be contained caused by the reaction such as internal combustion engine and external-combustion engine, boiler combustion, smelting, sintering, burning Dust, sulfide, carbide, carbon dioxide, heavy metal and other compositions mixed gas.

Burning and to smelt be the current most extensive mode for obtaining power and resource and processing polluter, as power generation, coking, Metal smelt, cement manufacture, internal combustion engine, waste incineration etc., but the generation of combustion reaction process cannot largely be collected in time It with the emission utilized, constitutes to environment detrimental effect, is also referred to as " polluting ", and pollute and arrived serious destruction Ball ecological environment threatens the degree of human survival.This has been undisputable fact, is discussed without excessive.Problem is with assorted The technical solution of sample realizes ideal effective purification and resource utilization to flue gas.

The ingredient of flue gas mainly has particulate matter and gas two major classes.

Handle dust particles method, it is most common be fiber bag precipitator, electrostatic precipitator, wet dedusting with And the combination of these methods.Although have passed through effort in more than 100 years, the effect of processing rests on the water of 8---30mg/m3 always On flat, i.e., this index is very difficult and undesirable.Such as pollutant as lead, this index cannot especially make us full Meaning.There are many method for handling the vapor phase contaminants such as sulfur dioxide, nitrogen oxides, mercury, and the mode of mainstream is with high temperature, catalysis at present Agent+ammonium hydroxide (SNCR, SCR) denitration and with lime water spray desulfurization, the attainable discharge index of institute is 50---200mg/m3, Best index report, claims and can achieve 5---20mg/m3, although this is difficult to realize, still one cannot make us full The data of meaning.Importantly, nearly all power plant, smeltery, cement plant, internal combustion engine, external-combustion engine ... are to carbon dioxide-base This is trapped without source.

Ideal index is that the various gas discharge standards in flue gas are reduced to 2mg/m3；Dust emission standard control System is in 10ug/m3 or less；The byproduct that flue gas generates will be handled, the chemical fertilizer such as ammonium sulfate and ammonium nitrate are become by gypsum, realized High value resource reclaim；Trap carbon dioxide most in flue gas.In order to realize this dream, people have paid unremitting Effort, but it is far away apart from ideal target.

Inventors believe why extremely difficult fume treatment is, crucial technological difficulties are: Practical Project occasion row The flue gas put all is the mixture of high concentrate dust and gas.

It is the technology relative maturity of the pure mixed gas of recovery, reliable, cheap from the point of view of chemical engineering technology, it is preceding Mentioning is that these gases cannot contain a large amount of dust, and otherwise dust can be deposited on the surface of mass transfer exchange media, seriously affect liquid gas The efficiency of reaction, exchange, or even pipeline can be blocked, make gas-liquid exchange, absorption process that can not continue to carry out, dust is to interfere gas An important factor for processing.Conversely speaking, once realizing efficiently separating for dust and gas, the processing of pure gas will become very simple It is single, reliable and cheap.It means that if the dust concentration in flue gas first can be reduced to microgram/cubic meter hereinafter, if It can be with mature, reliable technique easily effectively by ingredients such as nitrogen oxides, sulphur contained in gas, carbon dioxide, mercury It categorizedly decomposes, recycle.

In order to further increase the efficiency and level that dust is handled in flue gas, present inventor has performed long-term, deep to grind Study carefully and effort, researched and developed successfully air cleaning special hollow fibre film and for purified treatment membrane module dusty, such as (201810655024.9).Experiment shows can be by high concentrate dust contained in flue gas processing to 1-10ug/m3 hereinafter, than existing There is the efficiency of dedusting technology to improve 1000----10000 times or more, under conditions of not increasing windage, can make power plant pot For the smoke filtration containing high concentrate dust that fire grate goes out to the level of clean gas, this is just using mature, traditional chemical process skill Art further decomposes subsequent dedirt gas, recycles, handles and creates condition, also therefore to form a kind of completely new gas cleaning Processing system scheme provides experiment basis and feasibility.

There are many kinds of the processing techniques of the vapor phase contaminants of existing maturation, and what is drawn attention recently is ultraviolet light+oxidant Handle the research and bench-scale testing of flue gas, the scheme proposed such as (201610239826.2) patent application of Liu Yangxian.But The premise for being these schemes is that dust content in flue gas must be sufficiently low, and otherwise dust will be deposited on light source, be place Reason process cannot continue.

Summary of the invention

The progress obtained based on the above issues with the present inventor, the present invention propose a completely new system for cleaning fume Scheme and its technical process, it is characterised in that: the dust-filtering array made of heat exchanger, hollow-fibre membrane and its component, Scrubbing tower, low latitude tail gas air outlet composition；Its technical process is: the flue-gas temperature for being sent upstream combustion link with heat exchanger It reduces；It adjusts to 40--80 DEG C；Later, the filter array formed with hollow-fibre membrane and its component is by the dust catching in flue gas Filtering, its concentration is reduced under 1---30ug/m3；And then the flue gas after dedirt is sent into scrubbing tower absorption processing, it uses The cleaning solution of scrubbing tower removes, the gaseous substance in recovered flue gas；Later, tail gas is discharged into big compression ring through low latitude tail gas air outlet Border.

Further, the dust-filtering array made of hollow-fibre membrane and its component, used in film wire mould Material material is made；Or it is made of ceramic material；Or it is made of metal material；The film wire made of plastic material, section Diameter is that Φ 3 --- 30 mm of Φ, the length is 500---2000mm；Component film wire boundling as described in 20-200 root and At；The film wire total surface area of its single branch component of the component and the ratio of the flue gas flow passed through are the m of 1 m2/30-100 ³；Film wire in the component, film wire air outlet face high-pressure jet pipe port have high-voltage pulse air interval to be blown into, will High pressure draught is blown into inside film wire, generates pressure, the dust accumulation for accumulating in film wire outer surface is blown off；With 100---30000 branch institute It states component and forms the dust-filtering array.

Further, the dust-filtering array made of hollow-fibre membrane and its component, which is characterized in that in described The plastic material of film used by empty fiber membrane or ceramic material or metal material are made；Wherein, described to be made of plastic material Hollow-fibre membrane, diameter of section be Φ 3 --- 30 mm of Φ, the length is 500---2000mm, the component is by 20- 200 film wire boundlings form；The film wire total surface area and the ratio of the flue gas flow passed through of its single branch component of the component Value is the m3 of 1 m2/30-100；The film wire in the component, film wire air outlet face high-pressure jet pipe port, has High-voltage pulse air interval is blown into, and high pressure draught is blown into inside film wire, pressure is generated, will accumulate in the dust accumulation of film wire outer surface It blows off；The component, which is propped up, with 10---30000 forms the dust-filtering array.

Further, the dust-filtering array made of hollow-fibre membrane and its component, it is characterised in that: in described Film wire used by empty fiber membrane is made of polytetrafluoroethylplastic plastic material.

Further, the scrubbing tower is packed tower.

Further, the diameter of the packed tower is 0.5-25m, and quantity is 1-50, each packed tower series connection or simultaneously Connection connection, each packed tower is interior to use similar and different cleaning solution, each packed tower single-stage or multistage operating sequence, each packed tower point Not using or be used in combination the cleaning solution of heterogeneity and property.

Further, it is a liquid cabinet below the packed tower, aeration array is housed in liquid cabinet；The aeration array A kind of scheme is using polytetrafluoroethylhollow hollow fiber membrane as the aeration end for being aerated array；The top of the packed tower is equipped with one Serial spray head；There are a quartz burner array, the ultraviolet alignment of first layer of the quartz burner array below the spray head Manage horizontally arranged, there are the distance with 10----100mm between every root canal, next stratose pipe is horizontal, is spaced apart, direction with Upper layer tubulation has the angle of one 10-90 degree, or arranged in parallel with upper layer tubulation, and be staggered a 10---- in horizontal direction The distance of 100mm is in lower layer's fluorescent tube in the neutral gear of upper layer fluorescent tube；There are the distance of 10----100mm, tubulation between every layer of fluorescent tube The number of plies be 3---50 layers；It is a packing layer below the array of the quartz burner composition, packing layer is normal using spray column Advise filler；The job order of the packed tower is: the dust-filtering array made of the hollow-fibre membrane and its component is sent Dedirt gas, by aeration array spray, be sufficiently mixed with the absorbing liquid in liquid cabinet, and react；The gas of spilling exists It is moved upwards under fan action along described filler layer, quartz burner array, spray head, tail gas direction of air outlet；Quilt in liquid cabinet Absorbing liquid after aeration is promoted to packed tower top by liquid pump, sprays from spray head, along spray head, quartz burner array, filler Layer moves downward, and returns to liquid cabinet；Cleaning solution passage in transit quartz burner array, table of the liquid directly through quartz burner Face generates photodestruciton by ultraviolet light direct irradiation, generates a large amount of free radicals, and the flue gas close contact of free radical and rising occurs Reaction, cleaning solution continue traveling downwardly, and flow into packing layer, come into full contact with, react with the flue gas of rising, returned in liquid cabinet later.

Further, the ingredient of the cleaning solution and property are: water, ammonium hydroxide, nitric acid, sulfuric acid, sulfurous acid, sodium bicarbonate, Sodium chlorite, sodium hypochlorite, sodium sulfite, sodium sulphate, ammonium sulfite, diethanol amine, methyl diethanolamine or these liquid Mixing liquid.

Detailed description of the invention

Attached drawing 1 is the overall structure diagram of an example of a system for cleaning fume of the present invention.Figure In 101 be heat exchanger；102 be dust-filtering array made of hollow-fibre membrane and its component；103 packed towers；104 be liquid Cabinet；105 be aeration array；106 be that rich solution collects enrichment facility；107 be new liquid allotment supplementary device；108 low latitude tail gas outlet air Mouthful；109 quartz burner arrays；110 packing layers；111 spray heads.

Attached drawing 2 is the schematic diagram of an example of a hollow-fibre membrane and its component of the present invention.In figure, 201 It is high-pressure air pipe；202 be component shell；203 be big card；204 hollow-fibre membrane film wires；205 be high-pressure jet pipe port；206 It is film wire air outlet；207 upper face plates；208 lower face plates；209 manifold ports.

Specific embodiment

Provided system for cleaning fume basic structure according to the present invention, may be implemented as a variety of specific classes Type is one of them below.

System for cleaning fume according to the present invention, its main feature is that first will with the mode of hollow-fibre membrane ultra filtration The thorough filtering of dust in flue gas, is less than the degree of the clean gas of 1-30ug/m3, is washed again with traditional, mature later Tower technology is washed, by the gas removal in dedirt flue gas, is less than the degree of 2mg/m3, later by tail gas low-altitude discharged.Therefore, Just abandon original traditional SCR(290 DEG C 980 DEG C of -- 430 DEG C) or SNCR(800 DEG C ---) the temperature condition that uses of technique.

In order to be adjusted to the high-temperature flue gas come out from burning link to be suitble to gas cleaning processing system according to the present invention The working range of system should be arranged preposition heat exchanger 101, for reducing and adjusting flue-gas temperature, while recycle thermal energy.Heat is handed over Parallel operation is mature technology, can use various types of heat exchangers, no longer be described in detail.

Using the dedicated polytetrafluoroethylhollow hollow fiber membrane of air cleaning made of polytetrafluoroethylene material in this example, And membrane module is made with this hollow-fibre membrane.This material is suitable for work in 150-200 degrees Celsius of high temperature section, So, it is not necessary that it has to reduce flue-gas temperature, preposition cooling device can actually be not added.Needing most reduces temperature It is subsequent absorbing liquid, excessively high temperature will cause gasification and boiling, generate excessively high pressure, at this moment should avoid.

As the example of more time property, the flue-gas temperature sent from heat exchanger has had descended to 40---80 DEG C, is suitble to It works in the hollow-fibre membrane made of various plastics.

The support construction of membrane module in this example is made of upper face plate 207, lower face plate 208, component shell 202；Lower face plate A series of film wire air outlets 206 are housed, the other end of each film wire air outlet 206 connects a film wire 204 on 208； A series of high-pressure jet pipe ports 205 are housed, each high-pressure jet pipe port 205 face, one film wire goes out on upper face plate 207 Gas port 206；The side of component shell 202 is provided with several manifold ports 209；The top of component shell 202 is equipped with high-pressure air pipe 201.? Membrane module can be formed using the fixed film wire of epoxy resin casting method.Membrane module is mounted on " big card ", since big card is Term in now widely used dust settling pocket technique, colleague is known, and this will not be detailed here.

When work, flue gas is sucked hollow-fibre membrane by the negative pressure that blower 103 generates, the micro porous filtration dust on film wire surface, Dedirt gas reaches manifold port 209 by numerous film wire air outlets 206, with other membrane module manifold ports 209 in array Air-flow leave dust-filtering array together.

High-pressure air pipe 201 is connect with a pulse switch, and timing issues high voltage pulse air-flow, is distributed in component shell every High pressure draught is blown into each by one high-pressure jet pipe port 205 by each corresponding film wire air outlet 206 Inside root film wire, pressure is generated, the dust accumulation for accumulating in film wire outer surface is blown off, film wire is made to restore its initial resistance.

Filtering flue gas by hollow-fibre membrane film wire, dust concentration, which has had descended to, is less than 1-10ug/m 3, have become quite pure gas.

Next, be by 80 DEG C of temperature or less and be stripped of most dust flue gas be sent into scrubbing tower 104.Scrubbing tower 104 be traditional packed tower, and according to different flue gas sulfur contents, the size and scale of scrubbing tower 104 are had nothing in common with each other, and is answered It is between 1---25 meters with diameter.

Why past, stuffing washing tower cannot be directly used to the fume treatment of high pollution industry, and basic reason is cigarette Dust in gas will have a direct impact on the operating condition that packed tower is especially the scrubbing tower of intensive filler, for example, if in the flue gas of upstream Dust concentration is only 50g/m3 dust, per hour the air-flow of 300,000 m3, will generate the dust of tons of per hour, if mistake Filtering efficiency is 90%, and the dust into scrubbing tower also has 135kg/h, and daily 3 tons, this is unacceptable for scrubbing tower.Only Having reduces 1000--10000 times or more this data using hollow-fibre membrane hyperfiltration technique, enters the dust of scrubbing tower daily Lower than 0.3---3kg, cleaning solution just has the ability to accommodate or takes away these dust, could ensure the normal operation of scrubbing tower.

Since the scrubbing tower of packing type is mature chemical engineering facility and technique, technical detail is without being described in detail.

It is this using a kind of new packed tower as an example in smoke processing system according to the present invention In packed tower other than traditional filler, increases ultraviolet lamp tube matrix and hollow-fibre membrane is aerated the two links.It is described It is a liquid cabinet below packed tower, aeration array is housed, a kind of scheme of aeration head is in liquid cabinet: using in polytetrafluoroethylene (PTFE) Aeration end of the empty fiber membrane as aeration array；Many experiments show to use polytetrafluoroethylhollow hollow fiber membrane can as aeration end Solarization air cap is reduced to micron level, realize bubble-free aeration, gas and liquid can achieve it is sufficient mix, in conjunction with surface The increase of product geometric progression, or even will appear emulsification.In this way, the flue gas containing various composition is directly contacted with absorbing liquid, Ke Yijia It is acute it is desirable that reaction.

The absorbing liquid by aeration is drawn into pump the top of packed tower, is sprayed from spray head 111, directly spray in ultraviolet lamp On pipe array 109, the fluorescent tube of ultraviolet lamp tube array 109 is layered cross arrangement, and absorbing liquid is flowed through from the gap between fluorescent tube, real It is all to be close to tube wall to flow downward on border, the intensity of ultraviolet light is utilized to greatest extent.Absorbing liquid is all strong oxidizer, strong purple It can be cleaved under outside line effect, generate a large amount of free radicals, carried much by aeration process in the cleaning solution for being due to this Flue gas, meanwhile, the flue gas overflowed in liquid cabinet 104 ascension under fan action reaches herein, reacts herein with free radical generation.

Cleaning solution after ultraviolet lamp tube array 109 has contained a large amount of free radicals, continues traveling downwardly into packing layer 110, packing layer 110 is made of the common filler of such as Pall ring, Raschig ring etc, it is therefore an objective to contact area is further increased, it is real Now sufficiently reaction.

Later, cleaning solution returns to liquid cabinet.The flue gas be fully absorbed, reacted becomes the harmless tail of desulfurization denitration demercuration Gas is discharged from tail gas air outlet 108.100% sulfur dioxide, 99% nitrogen oxides, 99% mercuration close in the gas being discharged Object is all intercepted to be absorbed.

Realize that liquid gas exchanges using cleaning solution, especially with the Strong oxdiative of hydrogen peroxide, sodium hypochlorite, ammonium persulfate etc Agent+ultraviolet light can convert recyclable substance for substance reaction specific in gas, absorption, this is mature, reliable Technology is no longer described in detail.Cleaning solution of the present invention, property and ingredient have water, ammonium hydroxide, nitric acid, sulfuric acid, sulfurous acid, carbonic acid Hydrogen sodium, sodium chlorite, ammonium persulfate, sodium hypochlorite, sodium sulfite, sodium sulphate, diethanol amine, methyl diethanolamine, also also A greater variety of cleaning solutions are available.

The scrubbing tower of existing classics, the especially suitable mature and reliable of padding washing tower technology, can usually reach 99% Above removal efficiency, the flue gas after handling by scrubbing tower become pure gas, can be set with direct emission, original tradition In meter for high altitude discharge chimney and all to lose meaning to the heating link of high altitude discharge, can directly pass through low latitude Discharge outlet 105 is discharged into atmospheric environment.

Novelty of the invention is that: the dust-filtering array made of heat exchanger, hollow-fibre membrane and its component is washed Wash tower, low-altitude discharged mouth composition system for cleaning fume, be different from it is all once had, existing gas cleaning processing scheme.

Compared with (201610239826.2) of such as Liu Yangxian, the present invention has two o'clock outstanding advantage: 1, the hollow fibre proposed Tieing up film aeration has novelty and advance, and be practically used for spray is the emulsion of flue gas and oxidant, gas-liquid contact Possibility is maximum.2, the radiation intensity and distance of ultraviolet light square are inversely proportional, that is to say, that only on lamp tube wall, purple Outside line is only strongest, and spray liquid directly adheres to, flows through ultraviolet lamp tube outer wall, and the flue gas of rising carries out directly on tube outer wall Reaction, the utilization rate highest of ultraviolet light.

Practicability of the invention is: 1, can by flue gas dust pollution object and gas pollutant processing to better than big The level of gas background environment；It 2, can be with the resource object in almost all recovered flue gas；3, the dioxy in flue gas can directly be trapped Change carbon；3, entire treatment process carries out at low temperature, eliminates as to heating link needed for high altitude discharge, so that system is whole The thermal efficiency greatly increase, saved mass energy.4, technology maturation, practicability, reliability and success rate are very high.

Advance of the invention and have the beneficial effect that there will be the dust emission in flue gas to reduce 1000-10000 times, Index is increased to 1---30ug/m3 by 30-200mg/m3 at one stroke；By the finger of nitrogen oxides, dioxide emissions in flue gas It indicates 50-200mg/m3 and is increased to 2mg/m3 at one stroke, carbon dioxide is increased to 90% trapping by letting alone completely, and original height is dirty Dye discharge is changed into pure discharge, while saving heat energy, has recycled resource.Therefore, gas cleaning processing provided by the present invention System is the important technology progress cleaned in combustion field, and the very big burning for improving or eradicating coal, oil, gas, rubbish is generated Pollution problem opens up more long-range space for the utilization of the existing energy, is particularly conducive to power generation, smelting, sintering, coking, internal combustion Energy-saving, the emission reduction of the industries such as machine, cement, garbage disposal are conducive to the source trapping of carbon dioxide, are conducive to various energy resources The especially utilization and exploitation of coal resources, these all have strategic meaning.

Claims (7)

1. system for cleaning fume, it is characterized in that: being reduced with the flue-gas temperature that heat exchanger sends upstream combustion link；It adjusts It is whole to 40--80 DEG C；Later, the dust catching in flue gas is filtered with the filter array that hollow-fibre membrane and its component form, it will Its concentration is reduced under 1---30ug/m3；And then the flue gas after dedirt is sent into scrubbing tower absorption processing, use scrubbing tower Cleaning solution remove, the gaseous substance in recovered flue gas；Later, tail gas is discharged into atmospheric environment through low latitude tail gas air outlet；Institute Stating hollow-fibre membrane is polytetrafluoroethylhollow hollow fiber membrane；The component is Φ 3 with diameter of section --- 30 mm of Φ, length are 500---2000mm, quantity are that 20-200 root film wire boundling forms；The film wire total surface area of its single branch component of the component and institute By flue gas flow ratio be the m3 of 1 m2/30-100；Film wire in the component, film wire air outlet face are high Jet pipe port is pressed, has high-voltage pulse air interval to be blown into, high pressure draught is blown into inside film wire, pressure is generated, will accumulate in The dust accumulation of film wire outer surface is blown off；The component, which is propped up, with 100---30000 forms the hollow-fibre membrane and its component composition Filter array.

2. system for cleaning fume according to claim 1, it is characterised in that: described to use hollow-fibre membrane and its component Manufactured dust-filtering array, used in film wire be made of plastic material；Or it is made of ceramic material；Or with metal material system At；The film wire made of plastic material, diameter of section are that Φ 3 --- 30 mm of Φ, the length is 500---2000mm； Component film wire boundling as described in 20-200 root forms；The film wire total surface area of its single branch component of the component with passed through The ratio of flue gas flow is the m3 of 1 m2/30-100；Film wire in the component, film wire air outlet face high-pressure jet Pipe port has high-voltage pulse air interval to be blown into, high pressure draught is blown into inside film wire, pressure is generated, will accumulate in outside film wire The dust accumulation on surface is blown off；The component, which is propped up, with 100---30000 forms the dust-filtering array.

3. system for cleaning fume according to claim 1, the dust made of hollow-fibre membrane and its component Filter array, it is characterised in that: used film wire is made of polytetrafluoroethylplastic plastic material.

4. system for cleaning fume according to claim 1, it is characterised in that: the scrubbing tower is packed tower.

5. system for cleaning fume according to claim 4, it is characterised in that: the diameter of the packed tower is 1- 25m, quantity are 1-50, and each packed tower is connected in series or in parallel, and similar and different cleaning solution is used in each packed tower, Each packed tower single-stage or multistage operating sequence, each packed tower respectively using or be used in combination the cleaning solution of heterogeneity and property.

6. system for cleaning fume according to claim 1, it is characterised in that: be a liquid below the scrubbing tower Cabinet, equipped with aeration array in liquid cabinet；A kind of scheme of the aeration array is using polytetrafluoroethylhollow hollow fiber membrane as exposure The aeration end of gas array；The top of the scrubbing tower is equipped with a series of spray heads；There is a quartz burner battle array below the spray head Column, the first layer ultraviolet light tubulation of the quartz burner array is horizontally arranged, and there are with 10----100mm's between every root canal Distance, next stratose pipe is horizontal, is spaced apart, and direction and upper layer tubulation have an angle of one 10-90 degree, or with upper stratose Manage arranged in parallel, the distance for the 10----100mm that is staggered in horizontal direction makes lower layer's fluorescent tube be in the neutral gear of upper layer fluorescent tube In；There is the distance of 10----100mm between every layer of fluorescent tube, the number of plies of tubulation is 3---50 layers；The battle array of the quartz burner composition Column lower section is a packing layer, and packing layer uses spray column conventional fillers；The job order of the scrubbing tower is: from described hollow The dedirt gas that dust-filtering array made of tunica fibrosa and its component is sent is sprayed by aeration array, with the suction in liquid cabinet It receives liquid to be sufficiently mixed, and reacts；The gas of spilling is under fan action along described filler layer, quartz burner array, spray Head, tail gas direction of air outlet move upwards；Absorbing liquid after being aerated in liquid cabinet is promoted to packed tower top by liquid pump, from Spray head sprays, and moves downward along spray head, quartz burner array, packing layer, returns to liquid cabinet；Cleaning solution passage in transit ultraviolet radiator Pipe array, liquid generate photodestruciton by ultraviolet light direct irradiation directly through the surface of quartz burner, generate a large amount of free The flue gas close contact of base, free radical and rising, reacts, and cleaning solution continues traveling downwardly, and flows into packing layer, the flue gas with rising It comes into full contact with, react, returned in liquid cabinet later.

7. system for cleaning fume according to claim 1, it is characterised in that: the ingredient and property of the cleaning solution It is: water, ammonium hydroxide, nitric acid, sulfuric acid, sulfurous acid, sodium bicarbonate, sodium chlorite, ammonium persulfate, sodium hypochlorite, sodium sulfite, sulfuric acid The mixing liquid of sodium, diethanol amine, methyl diethanolamine or these liquid.