CN102580494A - Malodorous gas treatment system and method thereof - Google Patents
Malodorous gas treatment system and method thereof Download PDFInfo
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- CN102580494A CN102580494A CN2012100492045A CN201210049204A CN102580494A CN 102580494 A CN102580494 A CN 102580494A CN 2012100492045 A CN2012100492045 A CN 2012100492045A CN 201210049204 A CN201210049204 A CN 201210049204A CN 102580494 A CN102580494 A CN 102580494A
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Abstract
The invention discloses a malodorous gas treatment system and a method thereof, wherein the treatment system comprises a reaction vessel, the reaction vessel is separated into a first reaction chamber and a second reaction chamber which are positioned side by side through a clapboard, a gap is left between the clapboard and the top of the reaction vessel, and a waste gas inlet and a detergent outlet are arranged on the side of the lower part of the first reaction vessel; the malodorous gas treatment system further comprises a spray system and a detergent circulating pump which are arranged at the upper part of the first reaction chamber, a perforated plate is arranged at the lower part of the second reaction chamber and separates the second reaction chamber into a bioreaction area and a nutrient solution storage area, a purified-gas outlet is arranged on the side wall of the nutrient solution storage area in the second reaction chamber, and a draught fan is arranged at the purified-gas outlet; and a layer or a plurality of layers of inert fillers arranged on the perforated plate are contained in the bioreaction area, wherein microorganisms grow on the inert fillers in an attaching way. The system has a compact structure, is suitable to treatment of different kinds of malodorous gases of different concentrations and loads. The method is economic and efficient.
Description
Technical field
the invention belongs to the device and method of handling foul gas.
Background technology
are for preventing and avoid the influence of sewage treatment plant's stink to the surrounding resident life; Some developed countries have successively formulated some concrete regulations; Must not build the life measure in the outer 300m scope of for example German regulation municipal wastewater treatment plant boundary; Do not reach this requirement, will take the necessary measure that prevents the stink diffusion in the sewage treatment plant.Built in China becomes seat surplus sewage treatment plant's up 2800, supporting sewage pumping station seats up to ten thousand.Great majority are distributed in big or middle city, and what have is difficult to avoid the residential block, so its smell problem also should obtain solving.The pollution control of foul gas mainly contains two types: source control and collection post processing.When needing sewage treatment plant's addressing, source control will consider that stench maybe be to contiguous resident's influence, local air mobility status etc.In the technological design process, should carry out rational waterpower design, guarantee enough dissolved oxygen supplies, avoid the generation of sulfide.Sewage treatment plant should regularly remove the material that possibly produce stench, avoids the accumulation of lipid, mud etc.
are present, and the processing method of foul gas mainly contains absorption process, absorption method, Production by Catalytic Combustion Process and biological deodorizing method.Wherein:
absorption process is that water or solvent absorb the polluter in the waste gas method of getting off.Generally be applicable to the processing that has higher concentration and the dusty gas of certain recovery value is arranged.If the waste gas good water solubility can be absorbent with water then; If waste gas is insoluble in water, then must use chemical reagent, for example hydrogen sulfide, volatile sulfur gases, organic acid etc. can be considered alkaline absorbent; And for ammonia and amine gas, it is good can considering to use acid absorbent.Absorption liquid after it is handled often needs mode such as to put forward with gas again, and waste gas is driven out of.And the waste liquid of gas after carrying also needs handle discharging usually again.
absorption method mainly is to utilize adsorbent to produce characterization of adsorption to gas to remove waste gas, and general absorption is divided into physical absorption (active carbon, zeolite etc.) and chemisorbed (ion-exchange, iron hydroxide, zinc oxide etc.).The factor that influences adsorption efficiency comprises: the physical property of the concentration of adsorbent effective surface area, adsorbent, chemical composition, temperature, adsorbent and adsorbate, time of contact and activity etc.Active carbon is good to multiple foul gas adsorption effect, and reclaiming is easy, therefore is widely used in exhaust emission control.
biological deodorizing technology comprises biofilter, bio-trickling filter and biological scrubbing tower etc.The biofilter just begins in reality, to use in 20th century in early days, has been reliable technique comparatively now.The biofilter has generally comprised humidifying device and biological treatment device, and foul gas at first passes through humidifying device, and with the humidity of adjustment gas, this is a preprocessing process.The preliminary treatment that has has also comprised technologies such as adjustment, removal particle.Pretreated gas gets into biological treatment device.The filling surface of the biological treatment device various microorganisms that growing.After getting into filter bed, outer field moisture film is and adsorbed by filler from the gas phase main diffusion to filler for the pollutant in the foul gas, and the microbial degradation of finally being grown by filling surface is converted into carbon dioxide, water etc.The maximum difference of bio-trickling filter and biofilter is a filler top spray circulation fluid, except that mass transport process, also has very strong biodegradation in the equipment.Similar with the biofilter, what bio-trickling filter used is one type of filler such as rubble, plastics, pottery, and the surface of filler is the biomembrane of several millimeters thick of microbiota formation.Biological scrubbing tower is made up of an absorption chamber and a regenerated reactor.Biological scrubbing liquid (circulation fluid) self-absorption chamber top spray and descend makes pollutant and oxygen in the waste gas change liquid phase over to, the realization mass transfer.Absorbed the scrubbing liquid of waste gas component, flowed in the regeneration reactor (activated sludge tank), regenerated after logical people's air oxygenation.Absorbed off-gas is through microbiological oxidation, and the activated sludge suspension that is reproduced in the pond is removed from liquid phase.
The microbe species of
degraded stink substance comprises bacterium and fungi.Microorganism is main with bacterium in the conventional biofilter, therefore requires to keep in the biofilter moist environment.The removal of foul gas can be divided into three phases: organic matter from gas phase transfer to liquid phase, migration and absorbed, be degraded by microorganisms liquid phase by microorganism.For the pollutant of good water solubility, can from gas phase transfer to the water layer of bacterium surface rapidly, and degraded by bacterium.But, the low or lyophobic dust for solubility in water, the water layer of bacterium surface will hinder its mass transfer rate, cause treatment effeciency to reduce.In addition, the acidifying of filter bed and mummification usually worsen with the bacterium treatment effect of the biofilter that is the master.
The open CN1486777A of
Chinese invention patent discloses a kind of integral type fungi deodorizing reactor and method of operating thereof.This integral type fungi deodorizing reactor is a hydrostatic column; Form by humidification zone, biochemical reaction zone, humidifying liquid storage area and nutrient solution storage area; It is made up of two parts up and down: top is the cylinder of top closure; There is humidifying liquid inlet at the shrouding center of upper end, also is provided with the nutrient solution inlet on the locus circle of shrouding radius mid point; Cylinder lower end sidewall is provided with gas outlet, nutrient solution outlet; Cylinder lower open mouth periphery has a circle turned welt chimb, can match with the flange circle; The bottom is bowl-shape round box, and its diameter is identical with the top cylinder diameter, and bowl-shape round box is suitable for reading by the dividing plate capping, and the dividing plate diameter is greater than drum diameter, to match with the flange circle; The dividing plate center is installed with a thin cylinder, and thin cylinder is slightly shorter than the cylinder of upper end sealing, is installed with two gripper shoes on its outer circumference surface; Top gripper shoe is three rectangular slabs, in same horizontal circle side face, with the vertical vertical side joint of periphery, is the humidification zone gripper shoe; Following gripper shoe is the porose dividing plate of ring-type, is the filler gripper shoe; Have many apertures on the dividing plate that thin cylinder lower end is contained; Bowl-shape round box sidewall is provided with exhaust gas entrance, humidifying liquid outlet; Two parts are tightened up by securing member and are one up and down, filler are arranged, apposition growth fungi microbe on it in biochemical reaction zone.The method of operating of this integral type fungi deodorizing reactor is: waste gas gets in the humidification zone from exhaust gas entrance, and humidifying liquid gets into humidification zone through the humidifying liquid inlet, and waste gas contacts with the humidifying liquid convection current in humidification zone, and waste gas is prewetted; Waste gas with certain humidity directly gets into biochemical reaction zone by the outlet of humidification zone top, and in biochemical reaction zone, waste gas is by filling surface in the biochemical reaction zone and the inner fungus degrading that is adhered to.For keeping growth of microorganism desired nutritional material and keeping filler to have certain humidity; Regularly sprinkle contains the nutrient solution of materials such as nitrogen and phosphorus in biochemical reaction zone; Nutrient solution gets into biochemical reaction zone through the nutrient solution inlet; Excessive nutrient solution gets into the nutrient solution storage area, purifies back gas and is discharged by exhaust outlet.
The contribution of
above-mentioned patent mainly is humidification and biological respinse integrated; The acidifying and the mummification problem of the filter bed of puzzlement biofilter application have been solved; But the device that this patent provides only is suitable for handling the low or hydrophobic odorant of solubility in water, is inappropriate for the purified treatment of high concentration foul gas.
Above-mentioned several method is taken a broad view of in
, and absorption process, absorption method and Production by Catalytic Combustion Process are suitable for the processing of high concentration foul gas and adopt absorption process usually, and for the purified treatment of low concentration foul gas, the biological deodorizing technology is economical and effective comparatively.
Summary of the invention
technical problem to be solved by this invention is the deficiency that overcomes prior art, the malodorous gas processing system that provides a kind of foul gas that is suitable for variety classes, variable concentrations, different load to handle.
The foul gas processing method that
the present invention also will provide a kind of foul gas that is suitable for variety classes, variable concentrations, different load to handle simultaneously.
For solving the problems of the technologies described above, a kind of technical scheme that the present invention adopts is:
A kind of malodorous gas processing system; It comprises reaction vessel; This reaction vessel places the dividing plate in it to be divided into side by side first reative cell and second reative cell through one, leaves the space that first reative cell and second reative cell are connected between the top of this dividing plate and reaction vessel
Offer exhaust gas entrance and detergent outlet on the lower sides of said first reative cell, exhaust gas entrance is positioned at the detergent outlet top; Said malodorous gas processing system also comprises the washing agent circulating sprayer that is used for providing to the first reaction indoor circulation washing agent; This said washing agent circulating sprayer comprises the spray equipment that is arranged on the first reative cell top, the washing agent circulating pump that two ends are connected with the detergent outlet of the spray equipment and first reative cell respectively, and the height at place, the described space of the aspect ratio of spray equipment is low;
The bottom of said second reative cell is provided with perforated plate; This perforated plate is divided into second reative cell bio-reaction zone that is positioned at the top and the nutrient solution memory block that is positioned at the below; On the sidewall of second reative cell at nutrient solution memory block place, offer purified gas outlet, and be provided with air-introduced machine at this purified gas outlet place; The top of second reative cell offers the nutrient solution inlet, is connected with the nutrient solution nozzle in this nutrient solution porch;
Has the inert filler that one or more layers apposition growth that is placed on the perforated plate has microorganism in
described bio-reaction zone.
are according to further scheme of the present invention: the bottom of the bottom of described first reative cell and nutrient solution memory block is equipped with waste liquid outlet.
preferably also are provided with in said first reative cell in order to eliminate the demister of the washing agent that is atomized in this reative cell, so, can avoid or reduce washing agent and get in second reative cell.
preferably, said malodorous gas processing system also comprises and is used for replenishing mouthful to the washing agent that said spray equipment replenishes washing agent.
according to an aspect of the present invention; The bottom of said first reative cell is provided with porous plate; It is divided into first reative cell chemical washing damping district that is positioned at the top and the washing agent memory block that is positioned at the below; Said exhaust gas entrance is positioned at the porous plate below, and the liquid level of washing agent is lower than said exhaust gas entrance in the washing agent memory block.Under this embodiment, said chemical washing damping can be filled with inert filler in the district, also can not fill.
according to a preferred aspect of the present invention, said inert filler is a sponge.The microorganism that adheres on the described inert filler is preferably the complex microorganism crowd that multiple microorganism is formed.
Among
the present invention, described washing agent can be acid detergent or alkaline detergent, and the pH scope is 2 ~ 11.
The another technical scheme that
the present invention takes is: a kind of method that adopts above-mentioned malodorous gas processing system to carry out the foul gas processing; It is to make foul gas in exhaust gas entrance gets into the first reative cell lower space; Bottom memory at first reative cell has the acid detergent or the alkaline detergent that can react with the odorous gas in the foul gas; The washing agent of washing agent storage area sprays through the top of washing agent circulating pump at first reative cell; Up foul gas mixes with descending washing agent; Odorous gas in the foul gas be able to most of remove and humidity adjusted; Foul gas is got into by the space between the top of dividing plate and said reaction vessel in the bio-reaction zone of second reative cell afterwards, and the Purge gas in the microbial reaction district after the degraded of microorganism is discharged from purified gas outlet under the effect of air-introduced machine.
Because the employing of technique scheme, the present invention compared with prior art has following characteristics:
1, system architecture of the present invention compactness, structure is succinct, can keep the stable operation of long period, and operation is simple with the maintenance ten minutes.
2, system of the present invention have realized the integrated of chemical washing damping process and biochemical reaction process, are chemical-biological integral type odor removal.According to the foul gas that will handle; Select for use the corresponding washing agent can remove most hydrophily foul gas; And the humidity of having regulated waste gas simultaneously, and the remaining low or hydrophobic odorant of solubility in water can be removed through the microbial degradation in the bio-reaction zone in the foul gas.Therefore, system of the present invention is suitable for the foul gas of variety classes, variable concentrations, different load and handles, and economical and efficient.In addition, adopt the stratiform design in the bio-reaction zone, can adapt to different air inflows.
3, system of the present invention damping process are built-in, are easy to realize the regulation and control to foul gas humidity, are easy to regulate and control to realize the environment of suitable growth of microorganism, thereby save energy consumption.
Description of drawings
are done further detailed explanation below in conjunction with accompanying drawing and concrete embodiment to the present invention.
Fig. 1 is the structural representation according to malodorous gas processing system of the present invention;
wherein: 10, first reative cell; 10a, exhaust gas entrance; 10b, detergent outlet; 11, second reative cell; 11a, bio-reaction zone; 11c, purified gas outlet; 11b, nutrient solution storage area; 11d, nutrient solution inlet; 12, space; 2, dividing plate; 3, perforated plate; 4, air-introduced machine; 5, nutrient solution nozzle; 6, inert filler; 7, spray equipment; 8, washing agent circulating pump; 9, washing agent replenishes mouth; 13, porous plate; 100, chemical washing damping district; 101, washing agent storage area.
The specific embodiment
present embodiment provides a kind of malodorous gas processing system.As shown in Figure 1; Malodorous gas processing system mainly comprises reaction vessel; This reaction vessel places the dividing plate 2 in it to be divided into side by side first reative cell 10 and second reative cell 11 through one, between the top of dividing plate 2 and reaction vessel, leaves the space 12 that first reative cell 10 and second reative cell 11 are connected.
Be provided with a porous plate 13 in
said first reative cell 10, it is divided into first reative cell 10 chemical washing damping district 100 that is positioned at the top and the washing agent storage area 101 that is positioned at the below.The top of the sidewall of first reative cell 10 at 101 places is provided with exhaust gas entrance 10a in the washing agent storage area, below exhaust gas entrance 10a, is provided with detergent outlet 10b.This routine malodorous gas processing system also comprises being used in said first reative cell 10, circulating provides the washing agent circulating sprayer of washing agent; This washing agent circulating sprayer comprises the spray equipment 7 that is arranged on 100 tops, chemical washing damping district, the washing agent circulating pump 8 that two ends are connected with spray equipment 7 and detergent outlet 10b respectively; The height at 12 places, aspect ratio space of spray equipment 7 is low, and spray equipment 7 has a plurality of nozzles that are distributed on 100 tops, chemical washing damping district; In addition, demister can also be set, enter in second reative cell 11 through space 12 with the washing agent that prevents or reduce atomizing in position near spray equipment 7 and space 12.After operation a period of time, washing agent has loss in system, therefore, also is provided with the washing agent that is communicated with spray equipment 7 and replenishes mouth 9.
The bottom of
said second reative cell 11 is provided with perforated plate 3, and perforated plate 3 is fixedly connected with the inwall of reaction vessel.Perforated plate 3 is divided into second reative cell 11 bio-reaction zone 11a that is positioned at the top and the nutrient solution storage area 11b that is positioned at the below, and nutrient solution excessive in the bio-reaction zone 11a can enter into nutrient solution storage area 11b through perforated plate 3.On the sidewall of second reative cell 11 that nutrient solution memory block 11b belongs to, offer purified gas outlet 11c, and be provided with air-introduced machine 4 at this purified gas outlet 11c place; The top of second reative cell 11 offers nutrient solution inlet 11d, is connected with a plurality of nutrient solution nozzles 5 that are uniformly distributed with at this nutrient solution inlet 11d place.
Have the inert filler 6 that the multilayer apposition growth that is placed on the perforated plate 3 has microorganism in
described bio-reaction zone 11a, be specially sponge block.In addition, the bottom of the bottom of described first reative cell 10 and nutrient solution memory block 11b is equipped with waste liquid outlet.
are to sum up visible, and system architecture of the present invention is compact, and structure is succinct, operation with safeguard very simple.
present embodiment provides the malodorous gas processing system of application implementation example 1 to handle the method for the foul gas of compositions such as sulfide hydrogen and ethyl mercaptan.
The foul gas of compositions such as
sulfide hydrogen and ethyl mercaptan gets into 101 tops, washing agent storage area through exhaust gas entrance 10a, gets into chemical washing damping district 100 through porous plate 13.The washing agent of washing agent storage area 101 sprays on 100 tops, chemical washing damping district through washing agent circulating pump 8, and washing agent is the alkalescent medicament.Up waste gas mixes with descending washing agent, and the hydrogen sulfide in the waste gas etc. is able to most of the removal, and humidity is adjusted.Waste gas after the adjusting humidity directly gets into bio-reaction zone 11a by space 12.In bio-reaction zone 11a; Waste gas is through multilayer surface and inner sponge block that is attached with microorganisms such as cephalosporium acremonium, aspergillus wentii, penicillium froquentans, paecilomyces varioti after cultivating, and partially hydrophobic component residual in the waste gas is by bio-reaction zone microbial degradation.Purifying back gas is discharged by purified gas outlet under the effect of air-introduced machine 4.
Concentration of hydrogen sulfide is about 50ppmv in
air inlet, and ethyl mercaptan concentration is about 1.8ppmv.Gas flow is 1m 3 / h, experimental rig moves continuously.For keeping growth of microorganism desired nutritional material and keeping certain humidity, regularly sprinkle contains the nutrient solution of materials such as nitrogen and phosphorus in the biofilter, and the pH value of nutrient solution is about 4.5.Through damping, the relative humidity of biofilter air inlet is 80% ~ 90%.During the stable operation, the clearance of hydrogen sulfide and ethyl mercaptan remains on more than 95%.Compare with similar research, its obvious processing effect is superior to conventional deodorizing method.
To sum up, malodorous gas processing system of the present invention and method have following characteristics:
1, malodorous gas processing system is a biochemistry integral type deodorizing reactor, and it has gathered chemical washing and biological deodorizing functionality advantage separately in a device, both can remove the foul gas of high concentration, also can remove the foul gas of low concentration;
2, biochemistry integral type deodorizing reactor has realized chemical washing damping process and the integrated design of biochemical reaction process, and function is independently accomplished, and the equipment realization is integrated;
3, chemical washing damping district both provided the independent chemical washing deodorization functions of removing the hydrophily foul gas, can regulate the humidity of air inlet again, to adapt to the needs of follow-up biological deodorizing;
4, described humidity conditioning function is accomplished in chemical washing damping district, but the circulation of chemical detergent only carries out in chemical washing damping district, can't get into bio-reaction zone;
The kind of
5, described chemical detergent both can be an acid detergent, also can be alkaline detergent, and its pH scope can be between 2～11.
The purpose of
the foregoing description is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention
Claims (10)
1. malodorous gas processing system; Said malodorous gas processing system comprises reaction vessel; It is characterized in that: said reaction vessel places the dividing plate (2) in it to be divided into side by side first reative cell (10) and second reative cell (11) through one; Leave the space (12) that said first reative cell (10) and said second reative cell (11) are connected between the top of said dividing plate (2) and said reaction vessel
Offer exhaust gas entrance (10a) and detergent outlet (10b) on the lower sides of said first reative cell (10), said exhaust gas entrance (10a) is positioned at detergent outlet (10b) top; Said malodorous gas processing system also comprises being used in said first reative cell (10), circulating provides the washing agent circulating sprayer of washing agent; This said washing agent circulating sprayer comprises the spray equipment (7) that is arranged on said first reative cell (10) top, the washing agent circulating pump (8) that two ends are connected with the detergent outlet (10b) of described spray equipment (7) and said first reative cell (10) respectively, and the height at the place, the described space of aspect ratio (12) of described spray equipment (7) is low;
The bottom of said second reative cell (11) is provided with perforated plate (3); This said perforated plate (3) is divided into the bio-reaction zone (11a) that is positioned at the top with said second reative cell (11) and is positioned at the nutrient solution memory block (11b) of below; On the sidewall of second reative cell (11) at said nutrient solution memory block (11b) place, offer purified gas outlet (11c), and locate to be provided with air-introduced machine (4) in this said purified gas outlet (11c); The top of said second reative cell (11) offers nutrient solution inlet (11d), locates to be connected with nutrient solution nozzle (5) at this said nutrient solution inlet (11d);
Have one or more layers apposition growth that is placed on the said perforated plate (3) in the described bio-reaction zone (11a) inert filler (6) of microorganism is arranged.
2. malodorous gas processing system according to claim 1 is characterized in that: the bottom of the bottom of described first reative cell (10) and said nutrient solution memory block (11b) is equipped with waste liquid outlet.
3. malodorous gas processing system according to claim 1 is characterized in that: also be provided with in said first reative cell (10) in order to eliminate the demister of the washing agent that is atomized in this reative cell.
4. malodorous gas processing system according to claim 1 is characterized in that: said malodorous gas processing system also comprises the washing agent additional mouthful (9) that is used for replenishing to said spray equipment (7) washing agent.
5. malodorous gas processing system according to claim 1; It is characterized in that: the bottom of said first reative cell (10) is provided with porous plate (13); The washing agent memory block (101) that it is divided into said first reative cell (10) the chemical washing damping district (100) that is positioned at the top and is positioned at the below; Said exhaust gas entrance (10a) is positioned at said porous plate (13) below, and the liquid level of the interior washing agent in said washing agent memory block (101) is lower than said exhaust gas entrance (10a).
6. malodorous gas processing system according to claim 5 is characterized in that: be filled with inert filler in the said chemical washing damping district (100).
7. malodorous gas processing system according to claim 1 is characterized in that: said inert filler is a sponge.
8. according to claim 1 or 7 described malodorous gas processing systems, it is characterized in that: the microorganism that adheres on the described inert filler is the complex microorganism crowd that multiple microorganism is formed.
9. malodorous gas processing system according to claim 1 is characterized in that: described washing agent is acid detergent or alkaline detergent.
10. one kind is adopted the described malodorous gas processing system of claim 1 to carry out the method that foul gas is handled; It is characterized in that: make foul gas in exhaust gas entrance gets into the first reative cell lower space; Bottom memory at first reative cell has the acid detergent or the alkaline detergent that can react with the odorous gas in the foul gas; The washing agent of washing agent storage area sprays through the top of washing agent circulating pump at first reative cell; Up foul gas mixes with descending washing agent; Odorous gas in the foul gas be able to most of remove and humidity adjusted, foul gas is got into by the space between the top of dividing plate and said reaction vessel in the bio-reaction zone of second reative cell afterwards, the Purge gas in the microbial reaction district after the degraded of microorganism is discharged from purified gas outlet under the effect of air-introduced machine.
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| CN104001413A (en) * | 2013-02-27 | 2014-08-27 | 上海化学工业区中法水务发展有限公司 | Processing method for malodorous gas of chemical area sewage plant |
| CN104069733A (en) * | 2014-06-12 | 2014-10-01 | 桐乡市恒易生物科技有限公司 | Waste gas purifying system |
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Application publication date: 20120718 |