CN209630946U - A kind of UV photodissociation waste gas cleaning system - Google Patents

A kind of UV photodissociation waste gas cleaning system Download PDF

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Publication number
CN209630946U
CN209630946U CN201920005768.6U CN201920005768U CN209630946U CN 209630946 U CN209630946 U CN 209630946U CN 201920005768 U CN201920005768 U CN 201920005768U CN 209630946 U CN209630946 U CN 209630946U
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photodissociation
waste gas
spray column
benzene
liquid spray
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李俊波
李沣林
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Sichuan Yuanzhi Blue Environmental Protection Technology Co Ltd
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Sichuan Yuanzhi Blue Environmental Protection Technology Co Ltd
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Abstract

The utility model provides a kind of UV photodissociation waste gas cleaning system, including UV photodissociation device, active carbon deodorizing device, except benzene liquid spray column, gas-fog separator, absorption blower, chimney and control cabinet;Except benzene liquid spray column air inlet is used for and industrial waste gas outlet, except benzene liquid spray column gas outlet is connected to gas-fog separator air inlet, gas-fog separator gas outlet is connected to UV photodissociation device air inlet, the photodissociation device gas outlet UV is connected to active carbon deodorizing device air inlet, active carbon deodorizing device gas outlet is connected to absorption blower, and chimney is connected to absorption blower;Except benzene liquid spray column, gas-fog separator, UV photodissociation device, active carbon deodorizing device are connected with control cabinet respectively with absorption blower, above-mentioned apparatus is respectively controlled by control cabinet.By the purification system, can benzene, toluene and dimethylbenzene effectively in purifying industrial waste gases, cost is relatively low for the up-front investment of enterprise, and purified gas can be persistently up to standard.

Description

A kind of UV photodissociation waste gas cleaning system
Technical field
The utility model relates to industrial waste gas purifying fields, and in particular to a kind of UV photodissociation waste gas cleaning system.
Background technique
Industrial waste gas is that generate in plant area, enterprise fuel combustion and production process various are discharged into containing for air The general name of contaminant gases, including ammonia, trimethylamine, hydrogen sulfide, first sulphur hydrogen, methyl mercaptan, methyl sulfide, methyl disulfide, carbon disulfide And styrene, sulfide H2S, VOC class, benzene, toluene and dimethylbenzene etc..Industrial waste gas is discharged into atmosphere, can pollute air, these objects Matter is also possible to enter the internal of people by different approach respiratory tracts, influences the health of people.
UV photodissociation, that is, ultraviolet light technology, the 170nm spectrum and 184.9nm spectrum generated by ultraviolet lamp tube is to exhaust gas Ingredient is irradiated, and can crack the molecular link of bacterium in exhaust gas, destroys the nucleic acid (DNA) of bacterium, while in waste gas decomposition Oxygen molecule generates free oxygen, so need to be in conjunction with oxygen molecule because of the taken positron-electron imbalance of free oxygen, and then generates ozone, benefit Oxygenolysis is carried out to exhaust gas with ozone, is mainly used for the operating conditions such as sterilization, disinfection.
For industrial waste gas, there are following several purification styles at present: 1, UV photodissociation technology+active carbon purifying;2, directly high Temperature burns TO;3, accumulation of heat high temperature incineration RTO;4, (3,4 front ends can be carried out dense heat-storage catalytic burning RCO using zeolite runner Contracting).Currently, the medium-sized and small enterprises in most of China area are using always the first purification style, because up-front investment is at low cost, But this mode be difficult it is persistently up to standard, benzene homologues in mainly many chemical industry, spraying industry can not decomposition or degradation up to standard, For example, benzene, toluene and dimethylbenzene, and after active carbon saturation secondary dangerous waste cost of disposal it is also high.Second and the third, the Although four kinds of purification styles are completely up to standard, early investment cost is very high, the general unbearable cost of enterprise.
Utility model content
In view of the above shortcomings of the prior art, technical problem to be solved by the utility model is: designing a kind of UV light Solve waste gas cleaning system, benzene, toluene and dimethylbenzene that can effectively in purifying industrial waste gases, the up-front investment cost of enterprise compared with It is low, and purified gas can be persistently up to standard.
In order to solve the above technical problems, the utility model uses the following technical solution:
A kind of UV photodissociation waste gas cleaning system, including UV photodissociation device and active carbon deodorizing device further include except benzene liquid sprays Tower and absorption blower are drenched, except benzene liquid spray column air inlet with waste gas outlet for being connected to, removes benzene liquid spray column gas outlet and UV light The connection of device air inlet is solved, the photodissociation device gas outlet UV is connected to active carbon deodorizing device air inlet, and active carbon deodorizing device goes out Port is connected to absorption blower.
Further, it is described except in benzene liquid spray column along the vertical direction from the bottom up between set that there are three spray equipment, sprays Device includes that installation strainer, solution line, packing layer and multiple spray heads, solution line are mounted on installation filter screen bottom, packing layer Be laid on installation strainer upper surface, spray head be evenly arranged on solution line and spray head downward.
Further, except benzene liquid spray column air inlet is set to tower body lower sidewall, except benzene liquid spray column gas outlet is set to tower At the top of body.
Further, it is described except in benzene liquid spray column bottom be inclined-plane, the tilt angle of inclined-plane and horizontal plane is 3 °~ 10°。
It further, further include gas-fog separator, for by gas and water mist separation, gas-fog separator to be connected to except benzene liquid Between spray column gas outlet and UV photodissociation device air inlet.
It further, further include control cabinet, it is described except benzene liquid spray column, gas-fog separator, UV photodissociation device, active carbon remove Taste device is connected with control cabinet respectively with absorption blower.
Further, filter cotton and multiple activated carbon adsorption modules, filter cotton peace are equipped in the active carbon deodorizing device At active carbon deodorizing device air inlet.
It further, further include chimney, chimney is connected to absorption blower.
Further, the chimney is made of steel, and chimney is vertically-mounted on the ground, is equipped with and is kept away in chimney top Thunder needle.
Compared with prior art, the utility model has the beneficial effects that
UV photodissociation waste gas cleaning system disclosed by the utility model, by except benzene liquid spray column is come to the benzene in industrial waste gas It is that object is efficiently removed, benzene homologues mainly include benzene, toluene and dimethylbenzene, can be by 400mg/m3Triphen substance below has Effect ground absorbs, and removal rate is respectively: benzene 80%, toluene 80%, and dimethylbenzene is 90% or more, and this reduces UV photodissociation The purification pressure of device and active carbon deodorizing device, alleviates the saturation time of active carbon.It, can be effective by the purification system Benzene, toluene and dimethylbenzene in purifying industrial waste gases, cost is relatively low for the up-front investment of enterprise, and purified gas can continue It is up to standard.
Detailed description of the invention
Fig. 1 is the system block diagram of the UV photodissociation waste gas cleaning system in the embodiment of the present invention;
Fig. 2 is the structural schematic diagram that benzene liquid spray column is removed in the embodiment of the present invention;
Fig. 3 is the structural schematic diagram of gas-fog separator in the embodiment of the present invention;
Fig. 4 is the structural schematic diagram of UV photodissociation device in the embodiment of the present invention;
Fig. 5 is the structural schematic diagram of active carbon deodorizing device in the embodiment of the present invention;
Fig. 6 is the structural schematic diagram that blower and chimney are adsorbed in the embodiment of the present invention;
Fig. 7 is control cabinet schematic diagram in the embodiment of the present invention;
Fig. 8 is the step flow chart of the UV photodissociation waste gas purification in the embodiment of the present invention;
Fig. 9 is the curve graph that sodium citrate solution concentration influences toluene absorption efficiency in the embodiment of the present invention;
Figure 10 is the curve graph of industrial waste gas intake Different Effects triphen absorption efficiency in the embodiment of the present invention;
Figure 11 is the curve graph that industrial waste gas inlet gas concentration influences triphen absorption efficiency in the embodiment of the present invention;
Figure 12 is the combination energy list of part chemical molecular in the embodiment of the present invention.
Appended drawing reference:
1, strainer is installed;2, solution line;3, packing layer;4, spray head;5, benzene liquid spray column air inlet is removed;6, except benzene liquid sprays Drench tower gas outlet;7, leakage fluid dram;8, inclined-plane;9, benzene liquid is removed;10, gas-fog separator air inlet;11, gas-fog separator gas outlet; 12, UV photodissociation device air inlet;13, UV photodissociation device gas outlet;14, active carbon deodorizing device air inlet;15, active carbon taste removal Device gas outlet;16, filter cotton;17, activated carbon adsorption module;18, blower is adsorbed;19, chimney;20, lightning rod;21, it touches Screen.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solutions of the utility model.Following embodiment is only For clearly illustrating the technical solution of the utility model, therefore it is intended only as example, and cannot be used as a limitation and limit this reality With novel protection scope.
Embodiment:
Referring to Fig.1~Fig. 7, a kind of UV photodissociation waste gas cleaning system, including UV photodissociation device, active carbon deodorizing device, remove Benzene liquid spray column, gas-fog separator, absorption blower, chimney and control cabinet.Except benzene liquid spray column air inlet 5 is used for and industrial waste gas Outlet, except benzene liquid spray column gas outlet 6 is connected to gas-fog separator air inlet 10, gas-fog separator gas outlet 11 and UV light It solves device air inlet 12 to be connected to, UV photodissociation device gas outlet 13 is connected to active carbon deodorizing device air inlet 14, active carbon taste removal Device gas outlet 15 is connected to absorption blower 18, and chimney 19 is connected to absorption blower.Except benzene liquid spray column, gas-fog separator, UV Photodissociation device, active carbon deodorizing device are connected with control cabinet respectively with absorption blower, by the touch screen 21 of control cabinet to above-mentioned Device is respectively controlled.
The course of work of above-mentioned UV photodissociation waste gas cleaning system is as follows:
Industrial waste gas containing benzene, toluene and dimethylbenzene removes benzene liquid spray column, In from except benzene liquid spray column air inlet enters Except in benzene liquid spray column along the vertical direction from the bottom up between set there are three spray equipment, spray equipment includes installation strainer 1, solution Pipeline 2, packing layer 3 and multiple spray heads 4, solution line are mounted on installation filter screen bottom, and packing layer is laid on installation filter web sheet Face, spray head be evenly arranged on solution line and spray head downward, spray head sprinkling remove benzene liquid 9, except benzene liquid can absorb in industrial waste gas Benzene, toluene and dimethylbenzene;Industrial waste gas after removing triphen substance is separated through aerosol and then with UV photodissociation device to exhaust gas Photodissociation is carried out, then removes the peculiar smell in removing exhaust gas with active carbon deodorizing device again, is arrived finally by absorption blower and smoke stack emission In atmosphere.
When it is implemented, tower body lower sidewall will be set to except benzene liquid spray column air inlet, except benzene liquid spray column gas outlet is set At the top of tower body;Except bottom is set as inclined-plane 8 in benzene liquid spray column, the tilt angle of inclined-plane and horizontal plane is 3 °~10 °, preferably 5°;It is additionally provided with leakage fluid dram 7 in tower body sidewall bottom, for waste liquid to be discharged;16 He of filter cotton is equipped in active carbon deodorizing device Multiple activated carbon adsorption modules 17, filter cotton are mounted at active carbon deodorizing device air inlet;Chimney is made of steel, chimney It is vertically-mounted on the ground, lightning rod 20 is installed in chimney top.UV photodissociation device mainly includes that microwave generator, ion are smelly Oxygen Generator, control cabinet, medium air filtration, photocatalyst of titanium dioxide and outer case.The principle of UV photodissociation is as follows: utilizing special height Oxygen molecule in energy high ozone UV ultraviolet beam irradiation organic gas and air, cracks the molecular link of organic gas, and decompose Oxygen molecule in air generates free oxygen, i.e. active oxygen, UV+O2 → O-+O* (active oxygen) O+O2 → O3 (ozone).Free shape The contaminant molecule of state and ozone oxidation are combined into that small molecule is harmless or the compound of low evil, such as CO2, H2O.To reach net Change the effect of gas.Detergent power is up to 99%.
Reaction engineering formula: 1, UV+ macromolecule organic → low molecule organic matter
2, UV+ air (O2) → O3
3, low molecule organic matter+O3 → CO2+H2O+N2
Referring to Fig. 8, a kind of UV photodissociation exhaust gas purifying method, comprising the following steps:
S1: industrial waste gas being sent into and removes benzene liquid spray column, and benzene, toluene and two in industrial waste gas are removed by spray equipment Toluene;
S2: carrying out aerosol separation to the industrial waste gas after removing benzene with gas-fog separator, and by the Industry Waste pneumatic transmission after separation Enter UV photodissociation device;
S3: UV photodissociation is carried out to except the industrial waste gas after benzene by UV photodissociation device, and the gas after UV photodissociation is sent into Active carbon deodorizing device;
S4: removing the peculiar smell after photodissociation in gas by active carbon deodorizing device, then by absorption blower and chimney into Row discharge.
Wherein, spray equipment spray except benzene liquid is one of used oil, sodium citrate solution and sodium acetate solution, it is excellent Select sodium citrate solution.Used oil, sodium citrate and sodium acetate are best to the assimilation effect of 3 benzene waste gas, but used oil ingredient Complexity, regeneration treatment difficulty are larger;Citric acid and sodium acetate liquid absorption element are few, and regeneration difficulty is smaller;And the suction of sodium acetate Fruit produce effects without sodium citrate height, so finally selected sodium citrate handles triphen organic exhaust gas as additive.
Wherein, the concentration of sodium citrate solution is 1%~15%.Referring to Fig. 9, it can be seen that the concentration of sodium citrate solution Higher, the assimilation effect of triphen is better, 0%, l%, 3% sodium citrate solution assimilation effect highest there was only 47%, 54%, 61%, and 5%, 8% and 10% sodium citrate solution average absorption effect is 72.8%, 73.2% and 74%.Singly from absorption Effect considers that 10% sodium citrate solution is optimal, but integrate from the cost of absorbent and assimilation effect Consider, 5% sodium citrate solution is optimal.
Referring to Fig.1 0, it can be seen that the air inlet air quantity of 3 benzene waste gas is changed to 20L/min, other experimental conditions are constant In the case of, the removal rate of toluene increases with the reduction of air inflow.5% sodium citrate solution distinguishes the removal rate of 3 benzene waste gas It is: benzene 82.53%, toluene 85.55%, dimethylbenzene 100%.The air inlet air quantity of 3 benzene waste gas has significantly absorption efficiency Influence, air quantity is smaller, and absorption efficiency is better.Because air quantity is smaller, 3 benzene waste gas is longer in the residence time of absorbing reaction tower, The time of contact of namely exhaust gas and absorbing liquid is long, is conducive to absorption of the absorbing liquid to 3 benzene waste gas.
Wherein, the inlet gas concentration of industrial waste gas is 100mg/L~400mg/L.Referring to Fig.1 1, it can be seen that with air inlet The raising of concentration, absorption efficiency is better, but when concentration increases to 500mg/m3, absorption efficiency reduces instead.Generate this Kind phenomenon may be: there is gas-film controlleds in the process for absorbing liquid for solvent, and when the concentration is too high, solvent absorption gas is just It is not controlled by air film.
Referring to Fig. 2, spray equipment includes that installation strainer, solution line, packing layer and multiple spray heads, solution line are mounted on Install filter screen bottom, packing layer be laid on installation strainer upper surface, spray head be evenly arranged on solution line and spray head downward.It fills out The bed of material is Q-PAC filler or NCPAC filler.Filler is also a key factor for influencing absorption efficiency, and filler is smaller, is absorbed Effect is better.This phenomenon may be because are as follows: increase the diameter of filler, and make the contact surface area of filler and absorbing liquid reduce, To make removal rate decline.
Wherein, the pH value of sodium citrate solution is 6~9.The pH value of sodium citrate solution has certain shadow to absorption efficiency It rings, pH value or height or all removal of the reduction sodium citrate to 3 benzene waste gas, pH value are that the removal rate between 7~8 is best.
Wherein, except the working temperature of benzene liquid spray column is 5 degrees Celsius~15 degrees Celsius, temperature has significantly absorption efficiency Influence temperature is higher, and absorption efficiency is lower.
When it is implemented, ultraviolet wavelength is mainly 170nm and 184.9nm, photon energy be respectively 742KJ/mol and 647KJ/mol.The molecular link of cutting polluter molecule is cracked it is necessary to use the combination issued than polluter molecule can be by force Photon energy.Referring to Fig.1 2, list the combination energy of main chemical molecular.By in Figure 12 it is found that most of chemical substances Molecule combines can be lower than the photon energy of 170nm and 184.9nm length ultraviolet line, so, the efficient photodissociation clarifier of this UV can divide Release carbon, calcium, the most of chemical substances outside metal.
The advantage of above-mentioned UV photodissociation exhaust gas purifying method:
A, it efficiently removes stench: can efficiently remove volatile organic matter (VOC), inorganic matter, hydrogen sulfide, ammonia, thio-alcohol etc. Major pollutants and various foul smells, deodorization efficiency reach as high as 99% or more, and deodorising effect substantially exceeds country 1993 The emission standard for odor pollutants (GB14554-93) of promulgation and " discharge standard of air pollutants " promulgated in 1996 (GB16297-1996)。
B, without adding any substance: only needing that corresponding exhaust duct and air draft power is arranged, make stench/industrial waste gas Decomposing, purifying is carried out by this equipment, participates in chemical reaction without adding any substance.
C, adaptable: the efficient photodissociation clarifier of UV is suitable for high concentration, atm number, and different industrial waste gas substances take off Smelly, purified treatment, can daily 24 continuous throughout the twenty-four hour24, stable and reliable operation.
D, operating cost is low: the efficient photodissociation clarifier of UV is noiseless without any mechanical action, without personal management and daily Maintenance need to only be inspected periodically, this equipment energy consumption is low, and the extremely low < 50pa of equipment windage can save a large amount of air draft power energy consumptions.
E, without pretreatment: organic gas is without carrying out special pretreatment, such as heating, humidification, equipment working environment Celsius between -30 DEG C -95 DEG C, humidity can work normally between 2-13 temperature in 30%-98%, pH value.
F, occupation area of equipment is small, from heavy and light: being suitable for the specific conditions such as characteristics of compact layout, narrow field, equipment takes up an area face Product 1.2 square metres of </processing 10000m3/h air quantity.
G, high-quality imported material manufacture: fire prevention, Corrosion Protection are high, equipment performance safety and stability, using stainless steel material, Service life of equipment was at 15 years or more.
H, environmentally friendly high-tech patented product: using state-of-the-art technology theory in the world, pass through expert and my company project skill The prolonged and repeated test of art personnel, develops, and the high-tech environmental purification product with entirely autonomous intellectual property can Poisonous and harmful substance in industrial waste gas is thoroughly decomposed, and perfect deodorization, clean-up effect, the Industry Waste after decomposing can be reached Harmless discharge can be fully achieved in gas, do not generate secondary pollution, while having the function that high-effective disinfecting is sterilized.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to embodiment, those skilled in the art should understand that, it can be practical to this Novel technical solution is modified or replaced equivalently, without departing from the objective and range of technical solutions of the utility model, It should all cover in the protection scope of the utility model.

Claims (9)

1. a kind of UV photodissociation waste gas cleaning system, including UV photodissociation device and active carbon deodorizing device, it is characterised in that: further include Except benzene liquid spray column and absorption blower remove benzene liquid spray column outlet except benzene liquid spray column air inlet with waste gas outlet for being connected to Mouth is connected to UV photodissociation device air inlet, and the photodissociation device gas outlet UV is connected to active carbon deodorizing device air inlet, and active carbon removes Taste device gas outlet is connected to absorption blower.
2. a kind of UV photodissociation waste gas cleaning system according to claim 1, which is characterized in that described except in benzene liquid spray column Along the vertical direction from the bottom up between set there are three spray equipment, spray equipment includes installation strainer, solution line, packing layer and more A spray head, solution line are mounted on installation filter screen bottom, and packing layer is laid on installation strainer upper surface, and spray head is evenly arranged in molten On liquid pipe road and spray head downward.
3. a kind of UV photodissociation waste gas cleaning system according to claim 2, which is characterized in that remove benzene liquid spray column air inlet Set on tower body lower sidewall, except benzene liquid spray column gas outlet is set at the top of tower body.
4. a kind of UV photodissociation waste gas cleaning system according to claim 3, which is characterized in that described except in benzene liquid spray column Bottom is inclined-plane, and the tilt angle of inclined-plane and horizontal plane is 3 °~10 °.
5. a kind of UV photodissociation waste gas cleaning system according to claim 1, which is characterized in that it further include gas-fog separator, For by gas and water mist separation, gas-fog separator be connected to except benzene liquid spray column gas outlet and UV photodissociation device air inlet it Between.
6. a kind of UV photodissociation waste gas cleaning system according to claim 5, which is characterized in that it further include control cabinet, it is described Except benzene liquid spray column, gas-fog separator, UV photodissociation device, active carbon deodorizing device are connected with control cabinet respectively with absorption blower.
7. a kind of UV photodissociation waste gas cleaning system according to claim 1, which is characterized in that the active carbon deodorizing device Interior to be equipped with filter cotton and multiple activated carbon adsorption modules, filter cotton is mounted at active carbon deodorizing device air inlet.
8. a kind of UV photodissociation waste gas cleaning system according to claim 1, which is characterized in that further include chimney, chimney and Adsorb blower connection.
9. a kind of UV photodissociation waste gas cleaning system according to claim 8, which is characterized in that the chimney uses steel system At chimney is vertically-mounted on the ground, is equipped with lightning rod in chimney top.
CN201920005768.6U 2019-01-03 2019-01-03 A kind of UV photodissociation waste gas cleaning system Active CN209630946U (en)

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Application Number Priority Date Filing Date Title
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