A kind of volatile organic compounds processing unit of low energy consumptionTechnical field
The utility model relates to gas purification processing technology field, the volatile organic gas of specifically a kind of low energy consumptionBody processing unit.
Background technique
Volatile organic compound VOCs pollution has become one of significant contributor of atmosphere pollution, including prints, appliesThe industries such as material, spray painting, fuel oil, chemical industry, medicine, cultivation, food and drink can generate VOCs.According to the difference of VOCs concentration magnitude, andUsing different processing methods, current main processing method has burning, absorption, absorption, condensation, plasma, photocatalysis etc..
Heat accumulating type oxidizing process RTO, i.e. Regenerative Thermal Oxidizer are incited somebody to action at a high temperature of > 700 DEG CThe direct combustion oxidation of VOCs in exhaust gas is generally adapted at carbon dioxide and water to VOCs concentration > 5000mg/m3 higher concentrationExhaust gas is handled, and apparatus and process is more complex, and energy consumption is high for processing.
Heat accumulating type catalytic oxidation RCO, i.e. Regenerative Catalytic Oxidizers, are at 300-450 DEG CLower temperature under, the VOCs in exhaust gas is catalytically oxidized to corresponding carbon dioxide and water, be suitble to VOCs concentration in 2000-The intermediate concentration exhaust gas of 5000mg/m3 carries out purified treatment.Because RCO catalyst mainly uses the noble metals such as platinum, palladium, molybdenum, materialIt is higher with equipment cost and operating cost.
Corresponding concentration < 2000mg/m3 low concentration VOCs gas treatment, absorption method is more effective, such as active carbon adsorption,Mainly organic molecule to be adsorbed using the micropore of the Large ratio surface of carbon material, feature is that adsorption plant is simple, Non-energy-consumption,But it is needed replacing after activated carbon adsorption saturation, higher operating costs.
The skills such as photochemical catalytic oxidations and plasma oxidation such as the technology of the photoelectrocatalysis removal VOC of new development mainly includesArt is suitble to carry out purified treatment in the moderate concentration gas of 500-2000PPM to concentration, has good cost performance；And to denseThe energy consumption of degree≤500PPM low concentration VOCs gas, opposite processing is larger and efficiency is lower, and treatment effect is poor.
Because major part VOCs concentration caused by actual industrial and life belongs to low strength range, how to develop a kind of fitThe lower technology purified with the lower volatile organic compounds of processing cost of concentration is closed, is effectively to solve atmosphere pollution at present suddenlyIt needs.
Summary of the invention
The purpose of the utility model is to overcome the deficiencies of the prior art and provide a kind of volatile organic compounds of low energy consumptionProcessing unit, with the lower purification with the lower volatile organic compounds of processing cost of suitable concentration.
In order to achieve the above object, the utility model is a kind of volatile organic compounds processing unit of low energy consumption, includingMicropore gas absorption regeneration module, gas catalysis oxidation reaction module, sensing detection module, power supply and electrical control module,It is characterized in that: equipped with one group or more of micropore gas absorption regeneration module and one group or more between inlet plenum and discharge chamberGas catalysis oxidation reaction module, sensing detection module are individually positioned in inlet plenum and discharge chamber, sensing detection module it is defeatedEnter output end to connect with the signal of power supply and electrical control module transmission control terminal, the power of power supply and electrical control moduleOutput end is connect with the input terminal of the input terminal of micropore gas absorption regeneration module and gas catalytic oxidation module respectively.
The micropore gas absorption regeneration module includes adsorbent material bracket, desorption and regeneration heater and micro-porous adsorption materialMaterial, the upper and lower surface of adsorbent material bracket are equipped with desorption and regeneration heater, and microporous adsorbent material is mounted on desorption and regeneration heatingThe surface of device, desorption and regeneration heater are connect with power supply and electrical control module.
The microporous adsorbent material be with a thickness of 10-50mm membrane structure or size 1-10mm spherical shape or stickThe honeycomb tubular type cube or cylindrical structure of shape nutty structure or aperture in 1-10mm.
The microporous adsorbent material and adsorbent material bracket is parallel plate type array structure, microporous adsorbent material and absorptionGas passage, the spacing 2-20mm of gas passage are equipped between stock support.
The catalysis material of the gas catalysis oxidation reaction module is the nanostructure for being 10-100nm by particle sizeCrystal composition, shape are sheet, spherical, column or fiber.
It is urged in the gas catalysis oxidation reaction module by the plasma that a pair of or more cathode and anode formChange reaction chamber, cathode is arranged in parallel with anode grid substrate, and quartz or oxidation with a thickness of 0.1-3mm are equipped between cathode and anodeAluminium ceramic dielectric layer, the indirect frequency of cathode and anode be 10-100KHz, the high-frequency ac power that voltage is 0.5-20KV,Interelectrode current density is 0.01-10mA/cm2。
The light being made of in the gas catalysis oxidation reaction module a set of or more ultraviolet source and catalysis materialElectrocatalysis oxidation reaction room, ultraviolet source use electrodeless quartz lamp, wavelength 250-400nm, and unit light source power is 0.1-2kW, using high frequency or it is microwave induced shine.
The sensing detection module is made of optical ionic detector PID and temperature sensor TC, optical ionic detector PIDThe total concentration TVOC range of detection is 1-5000PPM, and the temperature range of temperature sensor TC detection is 0-500 DEG C, the electricityThe power bracket of source and electrical control module is 10-10000W.
The utility model compared with the existing technology, by micropore gas absorption regeneration module, gas catalysis oxidation reaction module,Sensing detection module, power supply and electrical control module composition.Micropore gas absorption regeneration module can directly carry out VOCs gasAbsorption；After adsorption saturation, the heater of material bottom is heated to poromerics so that VOCs desorbing gas；Then desorptionVOCs gas catalytic oxidation carried out to organic dirt by the unlatching of gas catalysis oxidation reaction module be decomposed into dioxyChange carbon and water.The utility model has equipment manufacturing costs and operating cost low, at the VOCs gas purification of low concentrationReason has purification efficiency high, and low energy consumption, has a wide range of application, adaptable feature.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model.
Fig. 2 is the structure chart of the utility model micropore gas absorption regeneration module.
Fig. 3 is the top view of the utility model micropore gas absorption regeneration module.
Specific embodiment
The utility model is described further now in conjunction with attached drawing.
Referring to Fig. 1, the utility model is a kind of volatile organic compounds processing unit of low energy consumption, including micropore gas is inhaledAttached regeneration module, gas catalysis oxidation reaction module, sensing detection module, power supply and electrical control module, inlet plenum 2 are equipped withAir inlet 1, discharge chamber 5 are equipped with gas outlet 6.Micropore gas between inlet plenum 2 and discharge chamber 5 equipped with one group or more adsorbsThe gas catalysis oxidation reaction module 4 of regeneration module 3 and one group or more, sensing detection module are individually positioned in 2 He of inlet plenumIn discharge chamber 5, the input/output terminal of sensing detection module is connect with the signal of power supply and electrical control module 7 transmission control terminal,The power output end of power supply and electrical control module 7 input terminal and gas with micropore gas absorption regeneration module 3 respectivelyThe input terminal of catalytic oxidation module 4 connects.
Referring to figs. 2 and 3, micropore gas absorption regeneration module 3 includes adsorbent material bracket 10, desorption and regeneration heater 11With microporous adsorbent material 12, the upper and lower surface of adsorbent material bracket 10 is equipped with desorption and regeneration heater 11, microporous adsorbent material12 are mounted on the surface of desorption and regeneration heater 11, and desorption and regeneration heater 11 is connect with power supply and electrical control module 7, desorptionRegenerative heater 11 is heated using resistance-type or high-frequency induction formula, maximum temperature≤200 DEG C.Adsorbent material bracket 10 is using stainlessAt least one of steel, ceramics or graphite material is made, and desorption and regeneration heater 11 includes the heating of resistance wire, graphite fibre etc.Material, temperature range are controllable at 30-250 DEG C.
Microporous adsorbent material 12 is by specific surface >=500m2The carbon or oxide poromerics of/g forms, micro-porous adsorption materialMaterial 12 have the function of adsorb VOCs, for micropore carbon particle, fiber, carbon nanotube, carbon nano-fiber, carbon aerogels, graphene,It is aluminium oxide, silica, the nanofiber of magnesia or zeolite, aeroge, molecular sieve, any one or more than one in particleMixture；Microporous adsorbent material 12 be with a thickness of 10-50mm membrane structure or size 1-10mm spherical shape or stickThe honeycomb tubular type cube or cylindrical structure of granular texture or aperture in 1-10mm.Pore size is 0.1-1nm, absorptionTemperature is 10-50 DEG C, when adsorbing VOCs to after saturation, can heat desorption, desorption temperature is 100-200 DEG C, and desorption time isIt can be desorbed within 0.5-5 hours completely.
Microporous adsorbent material 12 and adsorbent material bracket 10 are parallel plate type array structure, microporous adsorbent material 12 and absorptionGas passage, the spacing 2-20mm of gas passage are equipped between stock support 10.
The catalysis material of gas catalysis oxidation reaction module 4 is WO3、CuO、SnO2、TiO2、ZnO、MgO、CaO、Fe2O3、MnO2、Mn3O4、V2O5, at least one of NiO metal oxide, in metal oxide can doped with Pt, Pd, Au, Ag, Cu,At least one of Fe, N, F, C element.Catalysis material is made of the nanostructure crystal that particle size is 10-100nm, shapeShape is sheet, spherical, column or fiber.Catalysis material uses spraying, roller coating, printing, dip-coating, chemical vapor deposition CVD, physicsVapor deposition PVD etc. techniques are coated on ceramics, glass or metal base surface and form film, film with a thickness of 0.1-10 μm。
High-frequency capacitive dielectric barrier discharge formula plasma and catalysis material can be used in gas catalysis oxidation reaction module 4In conjunction with mode carry out, mode of the ultraviolet source in conjunction with catalysis material can also be used and carry out.Through plasma-catalytic ionizationAfter gas and catalysis material surface afterwards comes into full contact with, the catalytic efficiency of gas reaction can be improved.
It is reacted in gas catalysis oxidation reaction module 4 by the plasma-catalytic that a pair of or more cathode and anode formRoom, cathode is arranged in parallel with anode grid substrate, and quartz or aluminium oxide ceramics with a thickness of 0.1-3mm are equipped between cathode and anodeDielectric layer, the indirect frequency of cathode and anode be 10-100KHz, the high-frequency ac power that voltage is 0.5-20KV, between electrodeCurrent density be 0.01-10mA/cm2。
The power supply that condenser type catalysis reaction electrode is applied can be pulse DC or alternating current, with 0.5-10kV, 10-The high-voltage pulse power source master of 50kHz, power density are 0.1-100W/m2.Capacitive electrode can be made into tubular type or it is flat etc. fromDaughter generator, i.e., in quartz ampoule surfaces externally and internally or quartz plate upper and lower surface installation metallic film or mesh electrode as positive and negativePole, generation plasma is reacted after connecing high-frequency alternating power supply.
The photoelectrocatalysis being made of in gas catalysis oxidation reaction module 4 a set of or more ultraviolet source and catalysis materialOxidation reaction chamber, ultraviolet source use electrodeless quartz lamp, wavelength 250-400nm, and unit light source power is 0.1-2kW, useHigh frequency is microwave induced luminous.Preferably, electrodeless quartz lamp is the electrodeless induction ultraviolet lamp of quartz tube type, and unit light source power is not lowIn 10W, have the characteristics that high-efficient, the service life is long.
Sensing detection module is made of optical ionic detector PID and temperature sensor TC, optical ionic detector PID detectionTotal concentration TVOC range is 1-5000PPM, and the temperature range of temperature sensor TC detection is 0-500 DEG C；Can real-time monitoring always haveOutside the concentration of machine object TVOC and the temperature of desorption and regeneration heater 11, the indexs such as flow velocity, air pressure of also detectable gas.It is locatingFor the total organic matter TVOC concentration of reason in 1-500PPM, it is 10-10000m that unit module, which handles flow,3/h。
Power supply and electrical control module 7, power bracket 10-10000W.Power supply be micropore gas absorption regeneration module 3,Gas catalysis oxidation reaction module 4, sensing detection module are powered.Photoion is installed respectively in inlet plenum 2 and discharge chamber 5Detector is measured in real time the total organic matter TVOC concentration of the gas of disengaging, and optical ionic detector has small in size, responseFast feature.Electrical control module sentences the total organic matter TVOC concentration value that optical ionic detector detects by computerIt is disconnected, micropore gas absorption regeneration module 3 can be started and gas catalytic oxidation module 4 works, obtain the technological parameter of optimizationIt may make that the operational efficiency of device is high and low energy consumption.
The processing method of the utility model includes the following steps: that step 1, microporous adsorbent material are 1-500PPM to concentrationVOCs gas adsorbed.Step 2, after the gas concentration of microporous adsorbent material absorption reaches saturation, desorption and regeneration heatingDevice heats microporous adsorbent material, and the VOCs for adsorbing microporous adsorbent material is desorbed, and microporous adsorbent material regenerates simultaneouslyIt can continue to adsorb VOCs gas.Step 3, gas catalysis oxidation reaction module is opened, and it is anti-to carry out catalysis oxidation to organic pollutantIt answers, VOCs is decomposed into carbon dioxide and water and discharges.
General major part VOCs gas can be in 70-200 DEG C of range volatilization desorption, and the VOCs concentration of discharge chamber is higher at this time,It generally can be in 500-1000PPM range.When heating regeneration, while opening gas catalysis oxidation reaction module, can effectively byThe VOCs of desorption generates CO through gas catalysis oxidation reaction module2And H2The discharge of O gas.Photoelectrocatalysioxidization oxidization module mainly includesPlasma ionization or UV activation, then in conjunction with catalysis material, VOCs oxidation efficiency may make to further increase.
Embodiment 1
When VOCs concentration is less than 200PPM, such as with 50-200PPM concentration, 10000m3For/h air quantity, about using area10m2Microporous adsorbent material, adsorbent material be micropore honeycomb fill oxidate zeolite, aperture 3mm, VOCs go out gas concentration and existWithin 5PPM, reach saturation after about adsorbable 30h.The micropore gas absorption regeneration module heating desorption opening time of device setsIt sets in 3h, VOCs concentration is desorbed in 200-500PPM range at 200 DEG C in temperature setting.Add in micropore gas absorption regeneration moduleWhile thermal desorption is opened, gas catalysis oxidation reaction module is opened, using ultraviolet source catalytic oxidation technique, power 1kW,The higher VOCs catalysis oxidation of concentration can be decomposed into CO at this time2And H2O, processing time about 3h can aoxidize the VOCs of desorptionIt decomposes.Whole energy consumption is about individually using 15% or so of photoelectrocatalysioxidization oxidization processing energy consumption, and energy-saving benefit is significant.
Embodiment 2
When VOCs concentration is less than 300PPM, such as in 100-300PPM concentration range, 10000m3For/h air quantity, useArea about 20m2Microporous adsorbent material, adsorbent material be microporous carbon fiber film, go out gas concentration with a thickness of 20mm, VOCs and existWithin 10PPM, reach saturation after about adsorbable 20h.When unlatching is desorbed in the heating of the micropore gas absorption regeneration module of deviceBetween be arranged in 4h, temperature setting at 150 DEG C, be desorbed VOCs concentration in 500-1000PPM range.In micropore gas absorption regeneration mouldWhile block heating desorption is opened, gas catalysis oxidation reaction module, using plasma catalytic oxidation technique are opened, power isThe higher VOCs catalysis oxidation of the concentration of desorption can be decomposed into CO at this time by 4kW2And H2O, processing time about 4h can will be desorbedVOCs oxygenolysis.Whole energy consumption is about individually using 30% or so of photoelectrocatalysioxidization oxidization processing energy consumption, and energy-saving benefit is brightIt is aobvious.
Embodiment 3
When VOCs concentration is less than 500PPM, such as with 300-500PPM concentration, 30000m3For/h air quantity, using areaAbout 80m2Microporous adsorbent material, adsorbent material be microporous aluminum oxide Extruded Monolithic Celluar Ceramics, aperture 2mm, VOCs go out gas concentrationWithin 10PPM, reach saturation after about adsorbable 18h.When the micropore gas absorption regeneration module heating desorption of device is openedBetween be arranged in 6h, temperature setting at 180 DEG C, be desorbed VOCs concentration in 600-1000PPM range.In micropore gas absorption regeneration mouldWhile block heating desorption is opened, gas catalysis oxidation reaction module, using plasma catalytic oxidation technique are opened, power isThe higher VOCs catalysis oxidation of concentration can be decomposed into CO at this time by 6kW2And H2O, processing time about 6h can be by the VOCs of desorptionOxygenolysis.Whole energy consumption is about individually using 20% or so of photoelectrocatalysis processing energy consumption, and energy-saving benefit is obvious.
It can be as needed between the micropore gas absorption regeneration module and gas catalysis oxidation reaction module of the utility modelCarry out any combination.Such as using two groups of micropore gas absorption regeneration modules and one group of gas catalysis oxidation reaction module as a set ofSystem, it is another set of to be desorbed again while work, i.e. a set of absorption work can be switched in two groups of micropore gas absorption regeneration modulesWork is given birth to, the VOCs gas after desorption is CO through gas catalysis oxidation reaction module reaction treatment2And H2It discharges after O, has in this wayHigher treatment effeciency.If the VOCs concentration of air inlet is 300PPM, it first is adsorbed to saturation through about 20h by first group of adsorbent material,Start to carry out heating desorption simultaneously, starting gas catalysis oxidation reaction module carries out the VOCs of oxygenolysis desorption to discharging, and takes offAppendix agreement 3h may make regneration of adsorbent material；When first group of micropore gas absorption regeneration module starts desorption, air inlet VOCs is cutIt shifts to second group of micropore gas absorption regeneration module and carries out absorption work, when saturation switches to regeneration desorption and gas catalysis oxidationReaction module carries out reaction decomposition.The decomposition removal that efficient can carry out VOCs repeatedly.