CN202438261U - Biotrickling filter device for treating organic waste gas - Google Patents
Biotrickling filter device for treating organic waste gas Download PDFInfo
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- CN202438261U CN202438261U CN2012200274934U CN201220027493U CN202438261U CN 202438261 U CN202438261 U CN 202438261U CN 2012200274934 U CN2012200274934 U CN 2012200274934U CN 201220027493 U CN201220027493 U CN 201220027493U CN 202438261 U CN202438261 U CN 202438261U
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Abstract
The utility model discloses a biotrickling filter device for treating organic waste gas. The biotrickling filter device comprises a biotrickling filter, a base, a liquid circulation device and an air distribution system. An air outlet is arranged at the top of the biotrickling filter, an air inlet is arranged at the bottom of the biotrickling filter, and biological filler is filled in the biotrickling filter. The base is arranged at the bottom of the biotrickling filter and used for supporting and fixing the biotrickling filter. The liquid circulation device is respectively connected with the top and the bottom of the biotrickling filter. The air inlet of the biotrickling filter is connected with the air distribution system which comprises an electromagnetic type air pump, a waste gas distribution branch and a buffer bottle which are sequentially connected in series. The biotrickling filter device has the advantages of being good in stability, convenient to operate, capable of being recycled and the like.
Description
Technical field
The utility model relates to organic treatment of waste gas device field, is specifically related to a kind of bio-trickling device of handling organic exhaust gas.
Background technology
Along with the quickening of industrial expansion and city of the world's process, world's air quality has generally received threat, and in the atmosphere pollution substance system, the gaseous contamination material accounts for the whole world and enters more than 75% of atmosphere pollution material every year.SO continues
2And NO
XAfter the research boom, the pollution control of VOC (Volatile OrganicCompounds) has become the another focus that countries in the world are paid close attention to.
Bioanalysis because have that treatment effect is good, investment and operating cost is low, reaction condition gentle (normal temperature, normal pressure), non-secondary pollution, be easy to advantage such as bookkeeping; Especially when handling the organic exhaust gas of big flow, low concentration, more show its economy and superiority; Thereby received increasing attention, and obtain commercial Application to a certain degree.The 1980s, bioanalysis is handled volatile organic waste gas and is used widely in Germany and Holland, and late nineteen nineties, other countries such as U.S. also began extensive studies and application.
Bioanalysis mainly comprises biological washing method, biofiltration process, bio-trickling method etc.; Wherein, The bio-trickling method is except that the general advantage with bioanalysis; Have also that floor space is little, pressure is lower, be easy to regulate pH, gas-liquid is affixed touches advantages such as specific area is big, therefore is applicable to and handles low concentration hydrophobicity organic matter.
The filler of bio-trickling method processing low concentration indissoluble volatile organic waste gas is classified according to material, mainly contains ceramics filling, bamboo filler, special compost filler, organic polymer filler etc.The organic polymer filler is in light weight because of having, specific area is big, stable in properties, advantage such as can reuse and be applicable to commercial Application.
Publication number is that the one Chinese patent application of CN 101077472A discloses a kind of biological dripping and filtering system of cleaning organic waste gas and prepared the mycoderm method fast; The biological dripping and filtering system of cleaning organic waste gas is made up of the trickled-bed biofilter that filler is housed, bucket seat, liquid circulating apparatus, waste gas input unit and evolution gas-recycling plant; Wherein, trickled-bed biofilter is fixed on the bucket seat, is provided with screen between trickled-bed biofilter and the bucket seat; Bucket seat middle part links to each other with the waste gas input unit through the gas access; The bottom links to each other with liquid circulating apparatus through tube connector, and the top cover of trickled-bed biofilter is provided with the spray head that links to each other with liquid circulating apparatus, and is provided with gas vent; Gas vent links to each other with the Purge gas EGR, and the waste gas input unit is provided with gas distribution device.This patent application also discloses a kind of quick preparation mycoderm method of biological dripping and filtering system of cleaning organic waste gas, hangs film, applicable to the processing of industrial VOC, is specially adapted to the low concentration insoluble organic waste gas behind the extension film.This technical scheme is used more complicated, and is not high for the rate of removing of organic exhaust gas, and gas distribution device can't prepare required organic exhaust gas quickly and easily, exists technological deficiency.
Publication number is a kind of bio-trickling device and method of handling volatile organic waste gas for CN 1994533A discloses; A kind of bio-trickling device of handling volatile organic waste gas comprises that air inlet pipe, reactor body, nutrient solution automatic ration feedway, nutrient solution drip distribution apparatus, liquid seal device and blast pipe; The inner filling of reactor body can attached biological film porous aggregate, nutrient solution drips the top that distribution apparatus is positioned at reactor body, is made up of shower and water-locator; Liquid seal device is positioned at the bottom of reactor body; Connected to form by cone-shaped collection district and U type liquid sealing pipe, nutrient solution automatic ration feedway is linked to each other with U type liquid sealing pipe by liquid reserve tank, links to each other with shower through magnetic valve; Air inlet pipe and blast pipe lay respectively at the both sides of reactor body; Three's horizontal center line overlaps, and is provided with the flaring inlet duct and the district of flowing backwards between air inlet pipe and the reactor body, is provided with water conservancy diversion district and convergent exhaust apparatus between reactor body and the blast pipe.Though this technical scheme has reduced the height of flowing through of nutrient solution; Strengthen gas-liquid mass transfer and biodegradability, can handle more a large amount of volatile organic waste gas, still; This apparatus processes waste gas time is longer; Generally take more than 7 days, more satisfactory clearance just arranged, the processing time more in short-term organic exhaust gas to remove rate still undesirable.
Because most of volatile organic matter has lipophilicity, hydrophobicity, when the bio-trickling method was handled low concentration indissoluble volatile organic matter, the mass transport process between gas and the liquid was restricted; Hindered the treatment effeciency of this method; Therefore, need exploitation new equipment and method, further improve organic mass transfer effect; Improve the treatment effect of bio-trickling method, for commercial Application provides foundation.
Summary of the invention
The utility model provides the bio-trickling device of a kind of good stability, easy to operate, the processing organic exhaust gas that can reuse.
A kind of bio-trickling device of handling organic exhaust gas, comprise the bio-trickling filter that biologic packing material is housed that the top is provided with gas outlet and bottom and is provided with air inlet, be arranged on the bio-trickling tower bottom be used to support and fixed biologically drips pedestal, liquid circulating apparatus and the air distribution system of filter tower;
Described liquid circulating apparatus links to each other with the bottom with the top of bio-trickling filter respectively;
The air inlet of described bio-trickling filter is connected with air distribution system, and described air distribution system comprises electromagnetic type gas pump, waste gas preparation branch road and the surge flask of series connection successively.
Air distribution system can be simulated the generation organic exhaust gas, and combines with bio-trickling filter, can simulate the different operating modes in the industry practice running.
The described bio-trickling filter that biologic packing material is housed can adopt the packed tower of prior art, comprises the biologic packing material that tower body is inner with being filled in tower body.
In order to obtain better utility model effect, below preferred as the utility model:
Described waste gas preparation branch road comprises the diluent gas generation branch road that is connected with the first gas glass rotameter and is in series with the organic exhaust gas generation branch road of the second gas glass rotameter, micropore bubbling bottle successively; One end of described diluent gas generation branch road links to each other with the electromagnetic type gas pump, and the other end links to each other with surge flask; The import of the described second gas glass rotameter links to each other with the electromagnetic type gas pump, and the outlet of described micropore bubbling bottle links to each other with surge flask.In the utility model; Adopt gas bubbling organic compound volatility process to combine with the gas dilution method; Adjust the flow of bubbling generation gas and diluent gas through organic exhaust gas generation branch road and diluent gas generation branch road respectively and control the organic exhaust gas of simulating different concentration; Be convenient to the stability of research bio-trickling filter performance in the lab scale process, for research provides favourable necessary condition.
Described surge flask is columnar lucite bottle, and the centre is provided with two-layer perforated baffle.Surge flask can make bubbling generation gas and the abundant mixing of diluent gas, obtains the simulation organic exhaust gas of certain steady concentration.The upper and lower side of surge flask adopts flange seal, can avoid the excessive surge flask building that causes of gas pressure to leak gas through flange seal, if adopt the lucite surge flask of adhesion, is easy to cause adhesion place to be leaked gas because of pressure is excessive.Two-layer perforated baffle can make the bubbling generation gas of feeding and diluent gas stop certain hour in the surge flask, fully mixes.
Described liquid circulating apparatus comprises reservoir, liquid circulation pump, liquid control valve, liquid glass spinner flowmeter and the circulation fluid shower nozzle of series connection successively; Described reservoir is arranged in the pedestal, and described circulation fluid shower nozzle is arranged on the tower inner top of bio-trickling filter, can adopt replaceable circulation fluid shower nozzle, displacement when making things convenient for the circulation fluid shower nozzle to stop up.Circulation fluid in the reservoir can be through this liquid circulating apparatus spray easily in bio-trickling filter, and spray flow can control quickly and accurately, and the circulation fluid spray is flowed through and is recovered in the reservoir behind the biologic packing material.
The tower body of described bio-trickling filter is processed by lucite, is divided into multistage, the section with section between flange be connected, every section bottom is equipped with liquid re-distributor; Described biologic packing material adopts polyethylene cross Raschig ring.Described liquid re-distributor can make the liquid in every section tower body more evenly distribute, and guarantees gas-liquid fully contact admittedly, guarantees the transmission of organic pollution between gas-liquid-solid three-phase in the organic exhaust gas.That the biologic packing material of polyethylene cross Raschig ring has is in light weight, specific area is big, corrosion-resistant, be easy to advantages such as bio-film colonization.
The effective depth of described bio-trickling filter is 13～17: 2 with the ratio of internal diameter; The packing volume of described biologic packing material is 1: 1.5～3 with the ratio of the effective volume of bio-trickling filter.The packing volume of biologic packing material can make the pressure dimensionality reduction of bio-trickling device be held in the preferable range; Guaranteed the stability of device operation; Add the effective depth of bio-trickling filter and the preferable range of the ratio of internal diameter; Thereby make in the gas-liquid contact process, the organic pollution in the organic exhaust gas is absorbed by mycoderm more easily, conveniently removes organic pollution.
A kind of bio-trickling method of handling organic exhaust gas may further comprise the steps:
One, mycoderm preparation:
(1) with being 0.5～2.5 by volume with carbon-free nutrient solution after the activated sludge aeration preliminary treatment of coked waste water treatment plant: 9 mix;
Described carbon-free nutrient solution is a nutrient solution nitrogenous, phosphorus, and the mol ratio of nitrogen, phosphorus is 0.5～1.5: 1 in the carbon-free nutrient solution;
(2) phase I, every separated 10h～14h adds with respect to 10 of activated sludge volume
-3～10
-5Organic matter; Second stage repeats the operation of phase I, and organic addition is 1.5～3 times of phase I addition; Phase III repeats the operation of phase I, and organic addition is 4～7 times of phase I addition; Stage repeats the operation of phase I, and organic addition is 8～15 times of phase I addition; After the stage, obtain the Mixed Microbes nutrient solution;
The duration of phase I, second stage, phase III, stage is 4～10 days;
Step (2) is that 25 ℃～35 ℃, rotating speed are to cultivate under the condition of 120～180r/min in temperature;
(3) the Mixed Microbes nutrient solution in the step (2) is mixed the back with carbon-free nutrient solution by 1: 0.5～2 and in bio-trickling filter, spray,, biologic packing material is hung film, the preparation of 7～10 days completion mycoderms with the organic exhaust gas counter current contacting;
General in the preparation process of this mycoderm, the organic matter of adding is consistent with the target organic pollution that will handle in the organic exhaust gas, makes mixed bacterial have degradation capability preferably to this organic matter.Cultivation through four-stage makes mixed bacterial have extraordinary degradation capability to this organic matter, thereby helps the processing of organic pollution in the organic exhaust gas.
Two, the processing of organic exhaust gas:
After hanging film, feed organic exhaust gas in the bio-trickling filter, circulation fluid is through the liquid circulating apparatus spray, and organic exhaust gas is removed in the gas-liquid counter current operation.
Further preferred, described carbon-free nutrient solution comprises ammonium sulfate, dipotassium hydrogen phosphate, sodium dihydrogen phosphate, magnesium chloride, zinc sulfate and deionized water.Carbon-free nutrient solution also comprises some trace elements, like iron, copper, calcium etc.Wherein, dipotassium hydrogen phosphate, sodium dihydrogen phosphate can be regulated the pH value, help the pH of carbon-free nutrient solution is stabilized in 5～7.This carbon-free nutrition fluid power is that mycoderm provides nutriment more fully, makes mycoderm handle the organic pollution in the organic exhaust gas better.
Further preferred; Described circulation fluid is for containing the carbon-free nutrient solution of nonionic surface active agent polyoxyethylene sorbitan monostearate (Tween60); The concentration of polyoxyethylene sorbitan monostearate in the circulation fluid (Tween60) is 50～200mg/L; The pH of circulation fluid is 5～7, thereby removes the organic pollution in the organic exhaust gas fast and efficiently, in the process of handling organic exhaust gas; Need to add soda acid and make the pH of circulation fluid maintain 5～7, guarantee the removal speed and removal efficient of organic exhaust gas.Nonionic surface active agent Tween60 can adopt the commercially available prod, and is further preferred, the Tween60 surfactant that the Belgian ACROS ORGANICS of employing company produces in the bio-trickling method of this processing organic exhaust gas.
The void tower gas residence time is 30～120s in the described bio-trickling filter, and liquid-gas ratio is 10～40: 1, helps removing fast and efficiently the organic pollution in the organic exhaust gas.
Compared with prior art, the utlity model has following advantage:
The different organic exhaust gas of air distribution system simulation of the utility model; And can adjust the flow of diluent gas and bubbled gas, thereby can adjust the content of organic pollution in flow and the organic exhaust gas of organic exhaust gas through diluent gas generation branch road and organic exhaust gas generation branch road.The bio-trickling device that the utility model is handled organic exhaust gas have good stability, easy to operate, advantage such as can reuse.
This handles the bio-trickling method of organic exhaust gas; After in bio-trickling device, hanging film; Make bio-trickling device have stabilized treatment organic exhaust gas ability, the organic contamination substrate concentration was unstable during the operating mode operation ran into has stability preferably with situation such as running into stoppage in transit.
This is handled in the bio-trickling method of organic exhaust gas; Be convenient to the spray of circulation fluid through liquid circulating apparatus; In circulation fluid, add nonionic surface active agent Tween60, the organic pollutant removal efficient in the organic exhaust gas is improved greatly, and the void tower gas residence time is shorter; It is high to remove load, and it is high to remove efficient.
Description of drawings
Fig. 1 handles the structural representation of the bio-trickling device of organic exhaust gas for the utility model;
Fig. 2 is the degradation efficiency variation diagram of ortho-xylene under the embodiment 2 different void tower gas residence times, and wherein, ordinate is the degradation efficiency of ortho-xylene waste gas, and abscissa is for handling the fate of organic exhaust gas;
Fig. 3 is the phenogram of embodiment 3 continuous operation stabilities, and wherein, ordinate is the degradation efficiency of ortho-xylene waste gas, abscissa for time of handling organic exhaust gas (hour);
Fig. 4 is under the embodiment 4 different Tween60 concentration, the degradation efficiency variation diagram of ortho-xylene, and wherein, ordinate is the degradation efficiency of ortho-xylene waste gas, abscissa is for handling the fate of organic exhaust gas;
Fig. 5 is that the operation of embodiment 5 stoppage in transit operating modes is investigated; Circulation fluid contains surfactant Tween60 and does not contain under the surfactant Tween60 condition; The degradation efficiency variation diagram of ortho-xylene waste gas inlet gas concentration and ortho-xylene waste gas, wherein, left side ordinate is an ortho-xylene waste gas inlet gas concentration; The right ordinate is the degradation efficiency of ortho-xylene waste gas, and abscissa is for handling the fate of organic exhaust gas.
The specific embodiment
As shown in Figure 1; Bio-trickling device for the processing organic exhaust gas of the utility model; Comprise the bio-trickling filter that biologic packing material 9 is housed 18 that the top is provided with gas outlet 13 and bottom and is provided with air inlet 7, be arranged on bio-trickling filter 18 bottoms be used to support and fixed biologically drips pedestal 19, liquid circulating apparatus and the air distribution system of filter tower 18, liquid circulating apparatus links to each other with the bottom with the top of bio-trickling filter 18 respectively.Be provided with reservoir 8 in the pedestal 19, reservoir 8 is provided with corresponding water inlet and discharge outlet, and pedestal 19 can adopt the one design with reservoir 8.
The air inlet 7 of bio-trickling filter 18 is connected with air distribution system, and air distribution system comprises electromagnetic type gas pump 1, waste gas preparation branch road and the surge flask 5 of series connection successively.Waste gas preparation branch road comprises the diluent gas generation branch road that is connected with the first gas glass rotameter 2 and is in series with the organic exhaust gas generation branch road of the second gas glass rotameter 3, micropore bubbling bottle 4 successively; One end of diluent gas generation branch road links to each other with electromagnetic type gas pump 1, and the other end links to each other with surge flask 5; The import of the second gas glass rotameter 3 links to each other with electromagnetic type gas pump 1, and the outlet of micropore bubbling bottle 4 links to each other with surge flask 5.Surge flask 5 is columnar lucite bottle, and the centre is provided with two-layer perforated baffle, and the internal diameter of bottom surface is 120mm, and height is 120mm.Upper and lower side is by flange seal, and upper flanges is provided with the air inlet that is used for the air inlet that is connected with organic exhaust gas generation branch road and is used for being connected with diluent gas generation branch road.The air inlet 7 of the outlet of surge flask 5 and bio-trickling filter 18 is provided with the first gas sampling mouth 6 through pipeline connection in the middle of the pipeline.
Liquid circulating apparatus comprises reservoir 8, liquid circulation pump 14, liquid control valve 15, liquid glass spinner flowmeter 16 and the circulation fluid shower nozzle 17 of series connection successively; Reservoir 8 is arranged in the pedestal 19, and circulation fluid shower nozzle 17 is arranged on the tower inner top of bio-trickling filter 18, specifically can adopt replaceable circulation fluid shower nozzle.
The tower body of bio-trickling filter 18 is processed by lucite, is divided into multistage, the section with section between flange be connected, every section bottom is equipped with liquid re-distributor.The effective depth of bio-trickling filter 18 is 15: 2 with the ratio of internal diameter, and every section high 300mm, the internal diameter of bio-trickling filter 18 are 120mm, all adopts flange to connect between each section of bio-trickling filter.Biologic packing material 9 adopts polyethylene cross Raschig ring, and its thickness is 1mm.The internal diameter of bio-trickling filter 18 and the diameter ratio of biologic packing material are 10: 1, and the packing volume of biologic packing material 9 is 1: 2 with the ratio of the effective volume of bio-trickling filter 18.Three sections tops of bio-trickling filter 18 are respectively equipped with the second gas sampling mouth 10, the 3rd gas sampling mouth 11 and the 4th gas sampling mouth 12.
A kind of bio-trickling method of handling organic exhaust gas may further comprise the steps:
One, the preparation of mycoderm:
(1) acclimation shaking culture process blake bottle uses the frosted band plug conical flask of 250mL, and in the frosted band plug conical flask that the activated sludge 10mL and the carbon-free nutrient solution 90mL of the coked waste water treatment plant behind the aeration joined 250mL, the air in the conical flask provides oxygen;
Described carbon-free nutrient solution comprises inorganic salts and deionized waters such as ammonium sulfate, dipotassium hydrogen phosphate, sodium dihydrogen phosphate, magnesium chloride, zinc sulfate, and the concentration of ammonium sulfate is 2000mg/L in the carbon-free nutrient solution, and the concentration of dipotassium hydrogen phosphate is 3000mg/L in the carbon-free nutrient solution; The concentration of sodium dihydrogen phosphate dihydrate is 2000mg/L in the carbon-free nutrient solution; The concentration of magnesium chloride hexahydrate is 100mg/L, and the concentration of white vitriol is 2mg/L, and the concentration of ferrous sulfate heptahydrate is 5mg/L; The concentration of cupric sulfate pentahydrate is 2mg/L; Sodium Molybdate Dihydrate concentration is 2mg/L, and the concentration of calcium chloride is 1mg/L, and all the other are deionized water;
(2) every separated 12h uses the micro-amounts of liquids sample introduction needle in conical flask, to add the ortho-xylene of 1 μ L, as the organic carbon source of growth of microorganism, makes the gas in the conical flask be replaced into air fully when adding carbon source, so that sufficient oxygen, 1 week of cycling to be provided at every turn; Second week repeated the operation in first week, and the addition of each ortho-xylene is 2 μ L; The 3rd week repeated the operation in first week, and the addition of each ortho-xylene is 5 μ L; Around the, repeat the operation in first week, the addition of each ortho-xylene is 10 μ L, around the domestication after, obtain the Mixed Microbes nutrient solution;
Step (2) is that 30 ℃, rotating speed are to cultivate in the constant temperature oscillator of 150r/min in temperature.The above-mentioned Mixed Microbes nutrient solution that obtains is stored in 4 ℃ of refrigerators, and wherein a part continues enlarged culture, and the addition of each ortho-xylene is 10 μ L, and final accumulation obtains 1L Mixed Microbes nutrient solution;
(3) the 1L Mixed Microbes nutrient solution in the step (2) is mixed back spray in bio-trickling filter 18 with the carbon-free nutrient solution of 1L; The circulated sprinkling amount is 20L/h, and the void tower gas residence time is 60s, the biologic packing material 9 of flowing through; With the organic exhaust gas adverse current; Biologic packing material 9 is hung film, and every day, circulated sprinkling 10h accomplished the preparation of mycoderm in 7 days.
Two, the processing of organic exhaust gas:
After in the bio-trickling device of the utility model processing organic exhaust gas, hanging film, feed organic exhaust gas in the bio-trickling filter 18, circulation fluid sprays through liquid circulating apparatus, and organic exhaust gas is removed in the gas-liquid counter current operation.Circulation fluid contains the carbon-free nutrient solution of nonionic surface active agent Tween60, and the composition of carbon-free nutrient solution is consistent with the carbon-free nutrient solution in the step (1), and the concentration of surfactant Tween60 is 50～200mg/L in the circulation fluid, and the pH of circulation fluid is 5～7.
(1) after the bio-trickling device of the processing organic exhaust gas of embodiment 1 extension film is stablized, handle ortho-xylene waste gas:
25 ℃ of room temperatures, do not add Tween60, through the ortho-xylene waste gas of air distribution system bubbling air and ortho-xylene gas composition; Be respectively 100s, 60s, 45s, 40s in the void tower gas residence time; The concentration of ortho-xylene is 550～600mg/m in air inlet 7 place's organic exhaust gas
3, this concentration is gathered organic exhaust gas through the first gas sampling mouth 6, and measures through gas-chromatography hydrogen ion flame detector (FID); The circulation fluid spray flux is 20L/h, and circulation fluid is carbon-free nutrient solution, and other parameters are with embodiment 1.
(2) under the different void tower gas residence times; Handle organic exhaust gas condition operation 5 days for every kind; Every day, through calculating the degradation efficiency of ortho-xylene, concrete outcome was as shown in Figure 2 through the concentration of ortho-xylene in gas outlet 13 place's organic exhaust gas of gas-chromatography FID measurement bio-trickling filter 18.As shown in Figure 2, when the void tower gas residence time was 100s, the degradation efficiency of ortho-xylene can reach 100%; The degradation efficiency of ortho-xylene can reach 90% when the time of staying was 60s; The degradation efficiency of ortho-xylene maintained 40%～50% when the time of staying was 45s and 40s.When the void tower gas residence time was 100s, 60s, gas outlet 13 place's ortho-xylene exhaust gas concentrations of bio-trickling filter 18 all were lower than 70mg/m
3, this moment, emission gases reached the secondary standard of GB 16297-1996 discharge standard of air pollutants.At the ortho-xylene exhaust gas concentration is 550～600mg/m
3, the time of staying, the degradation efficiency of ortho-xylene waste gas increased along with the increase of the time of staying in this bio-trickling filter 18 when being 30～100s.
(1) after the bio-trickling device of the processing organic exhaust gas of embodiment 1 extension film is stablized, handle ortho-xylene waste gas:
25 ℃ of room temperatures, do not add Tween60, through the ortho-xylene waste gas of air distribution system bubbling air and ortho-xylene gas composition; Air inlet 7 place's ortho-xylene exhaust gas concentrations are 550～600mg/m
3This concentration is gathered organic exhaust gas through the first gas sampling mouth 6, and measures through gas-chromatography hydrogen ion flame detector (FID), and the void tower gas residence time is 100s; The bio-trickling device of continuous operation processing organic exhaust gas 60 hours, other parameters are with embodiment 1.
(2) investigate the ortho-xylene degradation efficiency and concern over time, every in gas outlet 13 place's tail gas of 3 hours measurement bio-trickling filters 18 concentration of ortho-xylene, through calculating the degradation efficiency of ortho-xylene waste gas, concrete result is as shown in Figure 3.As shown in Figure 3, bio-trickling filter 18 restarted back (i.e. intermittent duty operation), at 0～15 hour; Need a start-up course during bio-trickling filter 18 operations, the degradation efficiency of this process ortho-xylene is lower, and fluctuation is bigger; Running later stage degradation efficient is more stable continuously; Continuously the degradation efficiency of 60 hours ortho-xylenes of operation is still stable, the phenomenon of bio-trickling filter 18 collapses do not occur, with the condition of this void tower gas residence time among the embodiment 2 relatively; It is thus clear that operation and intermittent duty operation is as broad as long continuously; When this bio-trickling filter 18 is handled ortho-xylene waste gas persistence and stability better, thereby proved that the bio-trickling device that the present invention handles organic exhaust gas has stability preferably, can be suitable for different operating conditions.
(1) after the bio-trickling device of the processing organic exhaust gas of embodiment 1 extension film is stablized, handle ortho-xylene waste gas:
25 ℃ of room temperatures, through the ortho-xylene waste gas of air distribution system bubbling air and ortho-xylene gas composition; In the void tower gas residence time is 40s; The concentration of ortho-xylene is 550～600mg/m in air inlet 7 place's organic exhaust gas
3This concentration is gathered organic exhaust gas through the first gas sampling mouth 6; And through gas-chromatography hydrogen ion flame detector (FID) mensuration; The circulation fluid spray flux is 20L/h, and circulation fluid is the carbon-free nutrient solution that contains surfactant Tween60, in the circulation fluid Tween60 concentration be respectively 0,50,100mg/L.Other parameters are with embodiment 1.
(2) different Tween60 concentration conditions; Handled ortho-xylene waste gas 6 days under every kind of Tween60 concentration; Measure the concentration of ortho-xylene in gas outlet 13 place's tail gas of bio-trickling filter 18 every day, through calculating the degradation efficiency of ortho-xylene waste gas, concrete outcome is as shown in Figure 4.As shown in Figure 4, when Tween60 concentration was 0mg/L in the circulation fluid, the degradation efficiency of ortho-xylene was 35%～40%; When Tween60 concentration was 50mg/L in the circulation fluid, the degradation efficiency of ortho-xylene was 45%～55%, and when Tween60 concentration was 100mg/L in the circulation fluid, the degradation efficiency of ortho-xylene was 55%～65%.This shows that when the concentration of adding Tween60 was 50～100mg/L, ortho-xylene is removed efficient can improve 10%～20% when not adding Tween60.
(1) after the bio-trickling device of the processing organic exhaust gas of embodiment 1 extension film is stablized, handle ortho-xylene waste gas:
25 ℃ of room temperatures, through the organic exhaust gas of air distribution system bubbling air and ortho-xylene gas composition; In the void tower gas residence time is 40s; The concentration of ortho-xylene is 550～600mg/m in air inlet 7 place's organic exhaust gas
3, this concentration is gathered organic exhaust gas through the first gas sampling mouth 6, and measures through gas-chromatography hydrogen ion flame detector (FID), and the circulation fluid spray flux is 20L/h.Other parameters are with embodiment 1.
(2) under this service condition, operation is after 5 days earlier, and circulation fluid is the nutrient solution that contains surfactant Tween60, and Tween60 concentration is 50mg/L in the circulation fluid; Stopping transport brought into operation in two weeks again, and newly changing circulation fluid is carbon-free nutrient solution, returned to by the time near beginning most five days degradation efficiency and out of service again when more stable; Stopping transport brought into operation after two weeks again, and newly changing circulation fluid is the nutrient solution that contains surfactant Tween60, and Tween60 concentration is 50mg/L in the circulation fluid.Measure the concentration of ortho-xylene in gas outlet 13 place's tail gas of concentration and bio-trickling filter 18 of ortho-xylene in air inlet 7 place's organic exhaust gas of bio-trickling filter 18 respectively, concrete outcome is as shown in Figure 5.As shown in Figure 5, under this air distribution system of handling the bio-trickling device of organic exhaust gas was controlled, the inlet concentration of ortho-xylene waste gas was more stable.Not adding surfactant Tween60 is that 50mg/L compares with adding surfactant Tween60 concentration, investigates bio-trickling filter 18 processing ortho-xylene waste gas efficient and recovers needed running time.When not adding surfactant Tween60; Bio-trickling filter 18 resumes operation needs 10 days; Adding under the 50mg/L surfactant Tween60 condition; The time that bio-trickling filter 18 resumes operation only needs 5 days, this shows that nonionic surface active agent Tween60 not only can improve the efficient that the bio-trickling device of handling organic exhaust gas is handled organic exhaust gas, can also shorten the time of resuming operation when the bio-trickling device of handling organic exhaust gas runs into the stoppage in transit operating mode.
Claims (6)
1. bio-trickling device of handling organic exhaust gas; It is characterized in that, comprise the bio-trickling filter that biologic packing material is housed that the top is provided with gas outlet and bottom and is provided with air inlet, be arranged on the bio-trickling tower bottom be used to support and fixed biologically drips pedestal, liquid circulating apparatus and the air distribution system of filter tower;
Described liquid circulating apparatus links to each other with the bottom with the top of bio-trickling filter respectively;
The air inlet of described bio-trickling filter is connected with air distribution system, and described air distribution system comprises electromagnetic type gas pump, waste gas preparation branch road and the surge flask of series connection successively.
2. the bio-trickling device of processing organic exhaust gas according to claim 1; It is characterized in that described waste gas preparation branch road comprises the diluent gas generation branch road that is connected with the first gas glass rotameter and is in series with the organic exhaust gas generation branch road of the second gas glass rotameter, micropore bubbling bottle successively;
One end of described diluent gas generation branch road links to each other with the electromagnetic type gas pump, and the other end links to each other with surge flask;
The import of the described second gas glass rotameter links to each other with the electromagnetic type gas pump, and the outlet of described micropore bubbling bottle links to each other with surge flask.
3. the bio-trickling device of processing organic exhaust gas according to claim 1 and 2 is characterized in that, described surge flask is columnar lucite bottle, and the centre is provided with two-layer perforated baffle.
4. the bio-trickling device of processing organic exhaust gas according to claim 1 is characterized in that, described liquid circulating apparatus comprises reservoir, liquid circulation pump, liquid control valve, liquid glass spinner flowmeter and the circulation fluid shower nozzle of series connection successively;
Described reservoir is arranged in the pedestal, and described circulation fluid shower nozzle is arranged on the tower inner top of bio-trickling filter.
5. the bio-trickling device of processing organic exhaust gas according to claim 1 is characterized in that, the tower body of described bio-trickling filter is processed by lucite, is divided into multistage, the section with section between flange be connected, every section bottom is equipped with liquid re-distributor; Described biologic packing material adopts polyethylene cross Raschig ring.
6. the bio-trickling device of processing organic exhaust gas according to claim 1 is characterized in that, the effective depth of described bio-trickling filter is 13～17: 2 with the ratio of internal diameter;
The packing volume of described biologic packing material is 1: 1.5～3 with the ratio of the effective volume of bio-trickling filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200274934U CN202438261U (en) | 2012-01-20 | 2012-01-20 | Biotrickling filter device for treating organic waste gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200274934U CN202438261U (en) | 2012-01-20 | 2012-01-20 | Biotrickling filter device for treating organic waste gas |
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| CN202438261U true CN202438261U (en) | 2012-09-19 |
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| CN2012200274934U Expired - Lifetime CN202438261U (en) | 2012-01-20 | 2012-01-20 | Biotrickling filter device for treating organic waste gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580520A (en) * | 2012-01-20 | 2012-07-18 | 浙江大学 | Bio-trickling filtration device and method for treating organic waste gases |
| CN103007740A (en) * | 2012-12-26 | 2013-04-03 | 中国电子工程设计院 | Waste gas treatment method and device |
| CN106823776A (en) * | 2017-03-03 | 2017-06-13 | 北京工业大学 | A kind of biological drop of the improvement chemical fibre stench of anti-clogging considers apparatus and method |
| CN110237683A (en) * | 2019-05-27 | 2019-09-17 | 河北科技大学 | The novel reinforced absorption VOCs processing unit of one kind and its method |
-
2012
- 2012-01-20 CN CN2012200274934U patent/CN202438261U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580520A (en) * | 2012-01-20 | 2012-07-18 | 浙江大学 | Bio-trickling filtration device and method for treating organic waste gases |
| CN103007740A (en) * | 2012-12-26 | 2013-04-03 | 中国电子工程设计院 | Waste gas treatment method and device |
| CN106823776A (en) * | 2017-03-03 | 2017-06-13 | 北京工业大学 | A kind of biological drop of the improvement chemical fibre stench of anti-clogging considers apparatus and method |
| CN110237683A (en) * | 2019-05-27 | 2019-09-17 | 河北科技大学 | The novel reinforced absorption VOCs processing unit of one kind and its method |
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