CN209475995U - Cross-flow type drips filter box and bio-trickling filter - Google Patents
Cross-flow type drips filter box and bio-trickling filter Download PDFInfo
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- CN209475995U CN209475995U CN201920046278.0U CN201920046278U CN209475995U CN 209475995 U CN209475995 U CN 209475995U CN 201920046278 U CN201920046278 U CN 201920046278U CN 209475995 U CN209475995 U CN 209475995U
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Abstract
Disclosed by the utility model is a kind of cross-flow type drop filter box and bio-trickling filter in sewage treatment plant's exhaust-gas treatment field, the cross-flow type drips filter box, including cabinet, the cabinet is divided into inhalant region, packing area and exhalant region from top to bottom, packing layer is equipped in the packing area, two opposite sides of the packing area are equipped with gas vent, and described filler layer is cellular activated carbon.The bio-trickling filter is made of multiple cross-flow types drop filter box with water tank, gas tank and circulation, the packing area of the cabinet is located in gas tank, exhalant region is located in water tank, and the circulation includes the aqueduct being connected between the water inlet of cabinet and water tank and the water pump on aqueduct.The cross-flow type, which drips filter box, has smaller fluid resistance, keep gas distribution, the water distribution of packing layer more uniform, using cellular activated carbon as packing layer, absorption property is excellent, easy to be filmed, bed resistance are small, bed pressure drop is reduced, the long-term running stability of biological filter system is improved.
Description
Technical field
The utility model relates to sewage treatment plant's exhaust-gas treatment fields, and in particular to a kind of cross-flow type drop filter box and biological drop
Filter tank.
Background technique
With the progress of China's rapid development of economy and urbanization, large amount of sewage treatment plant is built, according to statistics, 2016
It is 3552 that year end China city, county town, which add up sewage treatment plant, wherein 2039, city, 1513, county town.But at sewage
Reason factory has a large amount of foul smell in the process of running and generates, source between grid, inlet pumping station, aerated grit chamber, primary sedimentation tank,
Aeration tank, sludge concentration tank etc. handle structures.Foul gas mainly includes H2S、NH3Equal inorganic compounds, while also containing big
Complicated volatile organic matter (VOCs), such as benzene homologues, organic sulfur compound, alcohols, ethers, aldehydes are measured, malodor problem is solved
It is the rigid requirement for building environment-friendly sewage treatment plant.
Biological odor removal method i.e. with microorganism by biological chemistry action, using the malodor components in exhaust gas as nutriment into
Row is utilized and is decomposed, and is converted into odorless component by microbial cell effect, while microorganism obtains increasing the deodorization side of breeding
Method has the characteristics that applied widely, secondary pollution is small, operating cost is low and maintenance management is simple, is at current foul gas
One of the main method of reason technology.In biological odor removal method Biotrickling filter can efficient process exhaust gas, exhaust gas pass through with biology
When the packing layer of film, odorant be dissolved in water by circulation fluid and be attached to the microorganism adsorption of filler surface, absorption, degradation and obtain
With removal.But during longtime running, because catabolite and biomembrane such as accumulate at the reasons, there are pressure drops in Trickling filter
High, susceptible to plugging problem.CN101125280A discloses a kind of Biotrickling filter for handling volatile organic waste gas, in filler
Take size pole to match in type of feed: small particle size filler is loaded in central area, and large particle size filler is loaded in the nearly wall circular region of surrounding,
To promote being uniformly distributed for air-flow, bed pressure drop is reduced.But in practical applications, bio-trickling filter longtime running can make
The fluid resistance of central area is increasing, largely accumulates so as to cause biomembrane in wall circular region, increases bed pressure drop.
Filler is one of the central factor for influencing biology deodorization technique treatment effect.The main function of filler is to microorganism
Suitable growing environment is provided, biological deodorizing filler include: peat, compost, sawdust, soil, volcanic rock, ceramics, polyethylene and
Raschig ring etc..In above-mentioned filler, the organic fillers such as compost, sawdust are perishable, and packing layer can occur hardened and collapse, and cause to give birth to
The object deodorizing device pressure loss increases, and energy consumption increases.In addition, rotten organic filler can give an offensive smell, pollution is aggravated.Ceramics etc.
The biological attachment growth of inorganic filler is poor.Ideal biologic packing material carrier should have the property that (1) superficiality is of fine quality
It is different, such as adhesion, retentiveness.Adhesion is conducive to well microorganism growth and pollutant absorption.Liquid phase environment is microbe survival
Key, certain retentiveness can keep the good bioactivity of microorganism；(2) large specific surface area.It is micro- to provide as wide as possible
The bond area of biology improves the biomass of unit volume filler, to improve the organic pollutant of unit volume as much as possible
Degradation amount；(3) porosity is high.Purpose is to prevent microorganism growth in filter bed from causing bed blocking, crushing increase, air flow shortcircuit
(including channel), removal efficiency decline；(4) structural strength height and anti-corrosion capability are strong.Ensure in long-time service, filler
Bed is not compacted, and remains the good environment of microorganism growth.
Under normal conditions, macromolecule polymer material has preferable carrier surface forming biofilm property and lower bed pressure drop, can be reduced
Bed blockage problem caused by microorganism growth and biomembrane are loose.But high molecular polymer filling adsorption ability is poor, to pollution
The removal capacity of object is lower.Active carbon has excellent retentiveness, huge specific surface area, porosity abundant and solid knot
Structure intensity has played very strong effect in the application field of biologic packing material for it.Active carbon itself has polluter certain
Suction-operated, can enhancement microbiological degradation capability.However, active carbon filler density is larger, voidage is relatively small, so just
Beginning voltage drop value is relatively large, and bioreactor runing time is too long to will cause higher bed pressure drop, substantially increase operation at
This.
Utility model content
To overcome above-mentioned deficiency, technical problem to be solved in the utility model present in existing sewage disposal process
It is: the cross-flow type drop filter box and the bio-trickling filter with the drop filter box that a kind of pressure drop is low, stable is provided.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Cross-flow type drips filter box, including cabinet, the cabinet are divided into inhalant region, packing area and exhalant region from top to bottom,
The top of the inhalant region is equipped with water inlet, and the bottom of exhalant region is equipped with water outlet, and packing layer is equipped in the packing area, described
Two opposite sides of packing area are equipped with gas vent
Further, described filler layer is cellular activated carbon.
Further, the cellular activated carbon is cube structure, porosity is 9~16 holes/cm2, aperture 1.5~
2.5mm。
Further, being equipped with water distributing tray between the inhalant region and packing area.
Further, being equipped with filler partition between the packing area and exhalant region, it is evenly equipped on the filler partition more
A drainage hole.
Further, the volume ratio of the packing area and cabinet is 0.5~0.8, the body of described filler layer and packing area
Product is than being 0.6~0.8.
Further, the water flow of the packing area is 1:1~3 by the area ratio that face and air-flow pass through face.
Bio-trickling filter with above-mentioned cross-flow type drop filter box, including water tank, gas tank and circulation, the water tank with
It is equipped with multiple cross-flow types between gas tank and drips filter box, the packing area of the cabinet is located in gas tank, and exhalant region is located in water tank, described
Circulation includes the aqueduct being connected between the water inlet of cabinet and water tank and the water pump on aqueduct.
Further, being set side by side with 2~5 cross-flow type drop filter boxs between the water tank and gas tank.
It is further that the both ends of the gas tank are respectively equipped with air inlet and air outlet, the side of the cabinet upper air-vent
To consistent with airflow direction in gas tank, the gas tank is equipped with sampling hole, and the water tank is equipped with culture medium entrance and culture medium
Outlet.
The beneficial effects of the utility model are:
1) drip filter box by the way that existing fair current and adverse current drop filter box are changed to cross-flow type, laterally 90 ° of circulation fluids to meet and
Exhaust gas can give the lesser fluid resistance of exhaust gas, keep the gas distribution of packing layer, water distribution more uniform, to improve biological filter system
Stability and load resistance.In addition, the gas-liquid laterally met can contact more uniform, keep biomembrane relatively uniform
Be grown in packing layer, take full advantage of the reaction useful space, reduce pressure drop.
2) using the cross-flow type trickling filter of cross-flow type drop filter box production, reduce catabolite and biomembrane and bed is blocked
Caused by influence, bigger cross-sectional area can be provided to reaction in the case where same treating capacity, be reduced to a great extent anti-
Answer product and biomembrane to block filler influences to W-response bring, further decreases bed pressure drop.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model cross-flow type drop filter box；
Fig. 2 is existing reverse-flow drop filter box and downflow type drop filter box structural schematic diagram；
Fig. 3 is the structural schematic diagram of the utility model bio-trickling filter；
Fig. 4 is that the drop filter box for loading cellular activated carbon and tradition are dripped bed pressure drop of the filter box under high-speed and compared；
Fig. 5 is that the drop filter box for loading cellular activated carbon and tradition are dripped bed pressure drop of the filter box under low-speed and compared；
Fig. 6 is sample examples figure after the molding of cellular activated carbon filler；
Fig. 7 is cellular activated carbon parameter of pore structure；
Fig. 8 is cellular activated carbon filler and reclaimed polypropylene drop filter box to H2The suction-operated of S；
Fig. 9 is nutrient solution in cellular activated carbon filler and reclaimed polypropylene drop filter box to H2The absorption of S；
Figure 10 is the biomembrane on traditional activated carbon filling material (1) and cellular activated carbon (2).
Label is 1- inhalant region, the packing area 2-, 3- exhalant region, 4- water distributing tray, 5- filler partition, 6- water tank, 7- gas in figure
Case, 8- aqueduct, 9- water pump, 11- water inlet, 21- gas vent, 31- water outlet, 61- culture medium entrance, 62- culture medium go out
Mouthful, 71- air inlet, the gas outlet 72-, 73- sampling hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, the cross-flow type of the utility model drips filter box, including cabinet, the cabinet are divided into from top to bottom
Inhalant region 1, packing area 2 and exhalant region 3, the top of the inhalant region 1 are equipped with water inlet 11, and the bottom of exhalant region 3 is equipped with water outlet
Mouth 31, the packing area 2 is interior to be equipped with packing layer, and two opposite sides of the packing area 2 are equipped with gas vent 21, the filler
Layer 2 is cellular activated carbon.Traditional drop filter box is as shown in Fig. 2, be divided into reverse-flow drop filter box and downflow type drop filter box, reverse-flow drop
The gas access of filter box is in the lower section of packing area, and for gas vent in the top of packing area, it is then exactly the opposite that downflow type drips filter box.
Difference of the cross-flow type drop filter box of the application compared with tradition drips filter box is that the gas vent 21 of the application, which is located at, to be filled out
Expect on two opposite sides of area 2, its advantage is that: in use, circulation fluid and exhaust gas meet in laterally 90 °, can be to useless
The lesser fluid resistance of gas, keeps the gas distribution of packing layer, water distribution more uniform, thus improve biological filter system stability and
Load resistance.In addition, the gas-liquid laterally met can contact more uniform, relatively uniform be grown on of biomembrane is enable to fill out
In the bed of material, the reaction useful space is taken full advantage of, pressure drop is reduced.
In addition, tradition drop filter box packing layer generally use the macromolecule polymer materials such as polypropylene, although its have compared with
Good carrier surface forming biofilm property and lower bed pressure drop, but high molecular polymer filling adsorption ability is poor, to the removal capacity of pollutant
It is lower.In some other field, also have using active carbon as packing layer, however, active carbon filler density is larger, gap
Rate is relatively small, so initial drop value is relatively large, bioreactor runing time is too long to will cause higher bed pressure drop,
Substantially increase operating cost.In contrast, the application utilizes its excellent water holding using cellular activated carbon as packing layer
Property, huge specific surface area, porosity abundant and solid structural strength, guaranteeing enough suction-operateds, can strengthen micro-
The degradation capability of biology.
It is proved by numerous studies, in order to make cellular activated carbon that there is good filtering and adsorption capacity, and it is preferable
The cellular activated carbon is set cube structure by carrier surface forming biofilm property and lower bed pressure drop, and porosity is 9~16
Hole/cm2, 1.5~2.5mm of aperture.The cross-sectional shape and structural parameters of cellular activated carbon are as shown in Figure 6, Figure 7.Using bee
Bed pressure drop comparison of the drop filter box and tradition drop filter box of nest active carbon respectively under high and low air speed is as shown in Figure 4, Figure 5, it is seen that
There is ultra low dropout using the drop filter box of cellular activated carbon.For adsorption effect, this drop filter box and conventional polypropylene filler drop are filtered
Case is to H2The comparison of the suction-operated of S is as shown in Figure 8, Figure 9, using cellular activated carbon as packing layer, H2The removal effect of S
It is higher by much than tradition drop filter box.As shown in Figure 10, the former is conventional filler, and the latter is honeycomb for finally formed biomembrane comparison
Active carbon, it is seen that have many advantages, such as that the starting time is short as filler using cellular activated carbon, be easy to biofilm, the upper microbe quantity of ACH
Measure obvious more crypto set, it is seen that ACH possesses better carrier surface forming biofilm property.
In order to enable recirculated water to flow uniformly through packing area 2, reacted to be come into full contact with gas, in the inhalant region
Water distributing tray 4 is equipped between 1 and packing area 2.For the ease of being put into packing layer in packing area 2, in the packing area 2 and exhalant region 3
Between be equipped with filler partition 5, multiple drainage holes are evenly equipped on the filler partition 5 for recirculated water and instill exhalant region 3.Further
, the volume ratio of the packing area 2 and cabinet is 0.5~0.8, and the volume ratio of described filler layer and packing area 2 is 0.6~0.8,
Body structure is arranged using the volume ratio, drop filter box can be made to reach in the case where guaranteeing lesser space and preferable efficiency optimal
Filtering and adsorption effect.In order to improve the reaction efficiency of liquid and gas, the water flow of the packing area 2 is passed through by face and air-flow
The area ratio in face is 1:1~3, and the water flow passes through the contact area of face, that is, water flow and 2 surface of packing area, and air-flow passes through face, that is, gas
The contact area of stream and 2 surface of packing area.
Using the bio-trickling filter of above-mentioned cross-flow type drop filter box production, as shown in figure 3, including water tank 6, gas tank 7 and circulation
Water system is equipped with multiple cross-flow types and drips filter box between the water tank 6 and gas tank 7, the packing area 2 of the cabinet is located in gas tank 7,
Exhalant region 3 is located in water tank 6, and the circulation includes the aqueduct 8 being connected between the water inlet 11 of cabinet and water tank 6
With the water pump 9 being located on aqueduct 8.The water tank 6 is used to collect the recirculated water for flowing through drop filter box, and forms nutrient solution, gas
Case 7 is used as exhaust gas and the drop catalytic channel of filter box.
Further, in order to meet filtering and the adsorption efficiency of general trickling filter, between the water tank 6 and gas tank 7 simultaneously
Column are provided with 2~5 cross-flow type drop filter boxs, and the both ends of the gas tank 7 are respectively equipped with air inlet 71 and gas outlet 72, the cabinet
Both the direction of upper air-vent 21 is consistent with airflow direction in gas tank 7, exhaust gas can be reduced by the resistance of drop filter box, while being increased
Contact area, make reaction it is more abundant.In addition, the gas tank 7 is equipped with sampling hole 73, the water tank 6 is equipped with culture medium
Entrance 61 and culture medium outlet 62, convenient for sampling observation and system control.
Cellular activated carbon is the important component of the present apparatus, in specific preparation, comprising the following steps:
A, carbon feedstock, binder and water are sufficiently mixed, pour the mixture into extrusion molding in honeycomb die, obtains humidity
Honeycomb ceramics, wherein by weight, 5~10 parts of carbon feedstock, 2~5 parts of binder and 0.5~1 part of water；
B, then drying steps a humidity honeycomb ceramics is warming up to 400~600 DEG C of heat preservations under an inert atmosphere, is carbonized
Material；
C, carbonized material is activated, obtains cellular activated carbon.
In this step a, subsequent mixing and form more uniform for convenience, the carbon feedstock was 100~200 meshes
Screenings.
In this step a, the carbon feedstock be sawdust, coconut husk, shell, bamboo powder, stalk, sludge, vinasse or coal at least
It is a kind of.In order to assign waste material higher value, carbon feedstock can choose discarded substance.
In this step a, the binder is at least one of coal tar, humic acid, PVB or polyvinyl alcohol.Bonding is added
The purpose of agent has been to bond carbon feedstock well, and the additive amount of binder does not have particular/special requirement, and the purpose that water is added is
In order to be sufficiently mixed raw material, the additive amount of water does not have particular/special requirement, in order to guarantee bonding and mixing sufficiently and not waste original
Material saves subsequent handling cost, preferably by weight, 5~10 parts of carbon feedstock, 2~5 parts of binder and 0.5~1 part of water.
In step a, the mold uses 9~16 holes/cm2Square hole honeycomb die.The extrusion pressure be 9~
15MPa。
In step b, the drying to water content is below 2%.Further, the drying is in 80~105 DEG C of conditions
It is more than lower drying for 24 hours.
In step b, during anoxic (i.e. inert atmosphere, such as nitrogen or helium) heating, cellulose and hemicellulose
The organic matters such as element are slowly decomposed, and charcoal is generated.If heating rate is too fast, high-temperature quick solution, primary product is then to close
At by-products such as gas and tar liquids.It is 5~10 DEG C/min it is advantageous to control heating rate.In order to guarantee that charing completely, needs
Controlling carbonization temperature holding temperature is 400~600 DEG C.Soaking time is 1~4h.
In step c, the purpose of activation is then to increase active function groups for pore-creating for carbon surface.This can be used in activation
The activation method of field routine, such as physically activated or chemical activation.Further, the physically activated activator used is water
Steam, air or CO2.The activator that the chemical activation uses is KOH, K2CO3Or H3PO4.Activation temperature is according to selected
Depending on activation method and activator.General activation temperature is 600~950 DEG C.Activation time is 1~4h.
In step c, physically activated dose is such as used, key reaction is the micropore that gas can expand charcoal at high temperature, and water steams
Gas can also be reacted with C element generates carbon monoxide and hydrogen to further make micropore；Chemical activating agent is such as used, such as
H3PO4, key reaction is H3PO4Glycosidic bond in hydrolyzed hemicellulose and cellulose, the aryl oxide key in lignin of riving, at this
During a, H3PO4It may also help in cross-linked polymer chain, to generate aromatic structure.The reaction principle of every kind of activator is not
Too, but main purpose is all to assign more oxygen-containing functional groups and pore structure to biological carbon surface, keeps charcoal chemical
Property is more active, adsorption capacity is stronger.
Below by specific embodiment, the present invention will be further described.
Embodiment 1
Coconut husk is crushed, grinding, and passes through 200 meshes；5 parts of coconut husks, 2 parts of humic acids and 0.75 part of distilled water is sufficiently mixed
It closes；Pour the mixture into 9 holes/cm2With the pressure extrusion molding (die parameters are as shown in table 1) of 15MPa in mold, humidity is obtained
Honeycomb ceramics；Obtained honeycomb ceramics is dry for 24 hours to water content lower than 2% under the conditions of 105 DEG C；Honeycomb ceramics after drying is placed in
In tube furnace, in N2600 DEG C of constant temperature are warming up to 4.0 hours with 5 DEG C/min under inert atmosphere, obtain carbonized material；By tube furnace with 5
DEG C/min is warming up to 950 DEG C, it is passed through steam activation 2.0h, then in N2It is cooled to room temperature under atmosphere, obtains cellular activated carbon.
Cellular activated carbon is dripped in filter box packing area (50 × 50 × 75cm) loaded on cross-flow type, the drop filter box packing area and drop
The volume ratio of filter box ontology is 0.6, and the shared drop filter box volume ratio of packing layer is 0.5, and draining bore dia is 0.1cm, such as Fig. 3 institute
Show, the drop filter box and exhaust gas inlet and outlet, cyclic water tank, water pump etc. are formed into a trickling filter reaction system.
In the case where loading cellular activated carbon, using traditional adverse current drop filter box, fair current drop filter box and dry bed conduct
Comparison carries out the bed pressure drop test under higher space velocity range (0-0.35m/s).As shown in figure 4, on-line velocity is 0-0.35m/
When s, cross-flow type trickling filter bed pressure drop may be lower than 150mm H2O/m charcoal bed, bed pressure drop size be reverse-flow > downflow type >
Cross-flow type > dry bed, it was demonstrated that in higher space velocity, cross-flow type, which drips filter box, can significantly reduce bed pressure relative to tradition drop filter box
Drop.
1 cellular material molding die parameter of table
| Mold 1 | Mold 2 | |
| Percent opening (hole/cm2) | 9(3×3) | 16(4×4) |
| Open-cellular form | Square hole | Square hole |
| Aperture (mm) | 1.4 | 2.3 |
| Wall thickness (mm) | 0.9 | 0.8 |
| Sample side length (mm) | 30 | 30 |
Embodiment 2
Coconut husk is crushed, grinding, and passes through 200 meshes；10 parts of coconut husks, 4 parts of coal tar and 1 part of distilled water is sufficiently mixed
It closes；Pour the mixture into 9 holes/cm2With the pressure extrusion molding of 15MPa in mold, moist honeycomb ceramics is obtained；The honeycomb that will be obtained
Body is dry under the conditions of 105 DEG C to be lower than 2% to water content for 24 hours；Honeycomb ceramics after drying is placed in tube furnace, in N2Inertia atmosphere
600 DEG C of constant temperature are warming up to 4.0 hours with 10 DEG C/min under enclosing, obtain carbonized material；Tube furnace is warming up to 950 with 10 DEG C/min
DEG C, it is passed through steam activation 2.0h, then in N2It is cooled to room temperature under atmosphere, obtains cellular activated carbon.
Cellular activated carbon is dripped in filter box (50 × 50 × 50cm) loaded on cross-flow type, the drop filter box packing area and drop filter box sheet
The volume ratio of body is 0.6, and the shared drop filter box volume ratio of packing layer is 0.5, by the drop filter box and wasted nickel catalyst instrument, cyclic water tank etc.
Form a biofilter reaction system.
In the case where loading cellular activated carbon, using traditional adverse current drop filter box, fair current drop filter box and dry bed conduct
Comparison carries out the bed pressure drop test under lower space velocity range (0-0.2m/s).As shown in figure 5, on-line velocity is reduced to 0.2m/
When s, bed pressure drop can be down to 50mm H2O/m- charcoal bed, bed pressure drop size are still reverse-flow > downflow type > cross-flow type > dry
Bed, and the pressure drop of cross-flow type drop filter box is almost close to dry bed, it was demonstrated that when compared with low-speed, cross-flow type drop filter box is compared to tradition
Drop filter box can still significantly reduce bed pressure drop, and running can be more stable lasting.
Embodiment 3
Coal is crushed, grinding, and passes through 200 meshes；8 parts of coals, 5 parts of coal tar and 0.6 part of distilled water is sufficiently mixed
It closes；Pour the mixture into 9 holes/cm2With the pressure extrusion molding of 15MPa in mold, moist honeycomb ceramics is obtained；The honeycomb that will be obtained
Body is dry under the conditions of 105 DEG C to be lower than 2% to water content for 24 hours；Honeycomb ceramics after drying is placed in tube furnace, in N2Inertia atmosphere
600 DEG C of constant temperature are warming up to 2.0 hours with 8 DEG C/min under enclosing, obtain carbonized material；Tube furnace is warming up to 900 DEG C with 8 DEG C/min,
It is passed through CO22.0h is activated, then in N2It is cooled to room temperature under atmosphere, obtains cellular activated carbon.Fig. 6 be cellular activated carbon sample at
Instance graph after type.Fig. 7 is the N of sample2Aspiration is attached-desorption curve, calculating its specific surface area is 682m2/g。
Embodiment 4
Sawdust is crushed, grinding, and passes through 200 meshes；7 parts of sawdusts, 3 parts of polyvinyl alcohol and 0.9 part of distilled water is abundant
Mixing；Pour the mixture into 16 holes/cm2With the pressure extrusion molding of 10MPa in mold, moist honeycomb ceramics is obtained；By what is obtained
Honeycomb ceramics is dry under the conditions of 105 DEG C to be lower than 2% to water content for 24 hours；Honeycomb ceramics after drying is placed in tube furnace, in N2It is lazy
400 DEG C of constant temperature are warming up to 2.0 hours with 6 DEG C/min under property atmosphere, obtain carbonized material；Carbonized material is impregnated into 4h in 10%KOH,
Carbonized material after dipping is warming up to 900 DEG C in tube furnace with 6 DEG C/min, 2.0h is kept, then in N2Room is cooled under atmosphere
Temperature dries after the carbonized material after KOH is activated is washed till neutrality using 0.1mol/L dilute hydrochloric acid, obtains cellular activated carbon.
Cellular activated carbon filler (ACH) prepared by the above method is filled in cross-flow type drop filter box packing layer, drop filter
The volume ratio of case packing area and drop filter box ontology is 0.8, and the shared drop filter box volume ratio of packing layer is 0.8, and 2 drop filter boxs are connected
For a reaction system.
The H that concentration is 1000ppmv is passed through to biological dripping and filtering system gas tank left end2S gas, empty bed residence time are 2min,
Results of regular determination exports H2The concentration of S.It selects common isometric commercial polypropylene foam stuffing (PP) as control, compares two kinds
The absorption property of filler.
As shown in Figure 8, the results showed that, ACH is to H2The absorption property of S is significantly stronger than PP.Initial reaction stage, the outlet of PP filler
H2The trend that S concentration linearly rises, only 3 hours, H2The exit concentration of S is increased to about 700ppmv from 0ppmv, approaches
Inlet concentration shows PP to H2The adsorption capacity of S is poor.And the outlet H of ACH2S concentration maintains always 0ppmv, drop filter box fortune
After row 49h, exit concentration just starts slowly to increase, and after reacting 75h, which remains at 200ppmv
Left and right, removal rate are up to 80%.This shows that the ACH filler has stronger H2S absorption property.
Embodiment 5
Sawdust is crushed, grinding, and passes through 200 meshes；6 parts of sawdusts, 4.5 parts of polyvinyl alcohol and 0.5 distilled water is abundant
Mixing；Pour the mixture into 16 holes/cm2With the pressure extrusion molding of 10MPa in mold, moist honeycomb ceramics is obtained；By what is obtained
Honeycomb ceramics is dry under the conditions of 105 DEG C to be lower than 2% to water content for 24 hours；Honeycomb ceramics after drying is placed in tube furnace, in N2It is lazy
400 DEG C of constant temperature are warming up to 2.0 hours with 9 DEG C/min under property atmosphere, obtain carbonized material；Carbonized material is impregnated into 4h in 10%KOH,
Carbonized material after dipping is warming up to 800 DEG C in tube furnace with 9 DEG C/min, 2.0h is kept, is then cooled in an inert atmosphere
Room temperature dries after the carbonized material after KOH is activated is washed till neutrality using 0.1mol/L dilute hydrochloric acid, obtains ACH.
Cellular activated carbon filler (ACH) prepared by the above method is filled in cross-flow type drop filter box packing layer, drop filter
The volume ratio of case packing area and drop filter box ontology is 0.8, and the shared drop filter box volume ratio of packing layer is 0.8, and 2 drop filter boxs are connected
For a trickling filter reaction system.
The circulation fluid configuration of reaction is as follows: Na2HPO41.2g/L、KH2PO4 1.8g/L、MgSO4·7H2O 0.1g/L、
(NH4)2SO4,0.1g/L、CaCl20.03g/L.By the peristaltic pump of a continuous work, by liquid in circulating slot with 5mL/
The flow of min is transported at the top of drop filter box, and subsequent liquid is uniformly fallen under the effect of gravity, from top, by filling batch, then
Flow into water tank circulating slot.After reaction starts, the H that concentration is 1000ppmv is passed through to gas tank left side2S, empty bed residence time be
2min.The PP of adsorption saturation compares test in selection example 2.
As shown in figure 9, the results show that initial reaction stage, two kinds of fillers just show fairly obvious difference.Fill PP's
Filter box is dripped, exit concentration is about 600ppmv, and fills the drop filter box of ACH, exports H2S concentration is always held at 50ppmv
Below.This shows that in the reaction bed of filled honeycomb active carbon, liquid can preferably absorb H2S.This is because the honeycomb is living
Property charcoal have preferable suction-operated.
Embodiment 6
Vinasse are crushed, grinding, and passes through 200 meshes；10 parts of vinasse, 5 parts of PVB and 1 part of distilled water are sufficiently mixed；It will
Mixture pours into 16 holes/cm2With the pressure extrusion molding of 10MPa in mold, moist honeycomb ceramics is obtained；Obtained honeycomb ceramics is existed
It is dry under the conditions of 105 DEG C to be lower than 2% to water content for 24 hours；Honeycomb ceramics after drying is placed in tube furnace, in N2Under inert atmosphere
It is warming up to 400 DEG C of constant temperature 2.0 hours, obtains carbonized material；Tube furnace is warming up to 900 DEG C, air-activated 1.0h is passed through, then exists
It is cooled to room temperature under inert atmosphere, obtains cellular activated carbon ACH.ACH prepared by the above method is filled in cross-flow type drop filter box
In packing layer, the volume ratio of the drop filter box packing area and drop filter box ontology is 0.8, and the shared drop filter box volume ratio of packing layer is 0.8,
It is a trickling filter reaction system by 2 drop filter box series connection.
The desulfurization mixed aerobic bacteria being enriched with will be tamed in advance to be cleaned for several times with the circulation fluid in embodiment 5, then, is toppled over
Enter to be filled in the drop filter box of ACH, initial mixing bacterium is retained among bed.It drips filter box bottom and matches a glass circulating slot, circulation
Circulation fluid of the microbiological culture media of 1.2L as drop filter box is contained in slot.Circulation fluid configuration is as described in example 5 above.Pass through one
Liquid in circulating slot is transported at the top of pillar drop filter box, subsequent liquid by the peristaltic pump of a continuous work with the flow of 5mL/min
Under the effect of gravity, it is uniformly fallen from top, by filling batch, then flows into circulating slot.Using an air pump, to circulating slot
In blast air, to realize indirect oxygen supply to microorganism.After reaction starts, being passed through concentration to gas tank left part is 1000ppmv's
H2S, empty bed residence time are 2min.As a comparison with traditional active carbon filler (AC).
As shown in Figure 10, which has many advantages, such as that the starting time is short, is easy to biofilm, the upper microorganism of ACH
The obvious more crypto set of quantity, it is seen that ACH possesses better carrier surface forming biofilm property.
After bio-trickling filter runs 30 days stabilizations, two reaction bed pressure drops are determined, the results show that entire bed pressure
It is reduced to 1-2mm water column, 3~12mm water column far below AC shows that bed pressure can be substantially reduced with ACH for biology drop filter box filler
Drop significantly reduces operating cost.
Claims (10)
1. cross-flow type drips filter box, it is characterised in that: including cabinet, the cabinet is divided into inhalant region (1), filler from top to bottom
The top of area (2) and exhalant region (3), the inhalant region (1) is equipped with water inlet (11), and the bottom of exhalant region (3) is equipped with water outlet
(31), packing layer is equipped in the packing area (2), two opposite sides of the packing area (2) are equipped with gas vent (21).
2. cross-flow type as described in claim 1 drips filter box, it is characterised in that: described filler layer is cellular activated carbon.
3. cross-flow type as claimed in claim 2 drips filter box, it is characterised in that: the cellular activated carbon is cube structure,
Porosity is 9~16 holes/cm2, 1.5~2.5mm of aperture.
4. cross-flow type as described in claim 1 drips filter box, it is characterised in that: set between the inhalant region (1) and packing area (2)
There are water distributing tray (4).
5. cross-flow type as described in claim 1 drips filter box, it is characterised in that: set between the packing area (2) and exhalant region (3)
Have filler partition (5), is evenly equipped with multiple drainage holes (51) on the filler partition (5).
6. cross-flow type as described in claim 1 drips filter box, it is characterised in that: the packing area (2) and the volume ratio of cabinet are
0.5~0.8, the volume ratio of described filler layer and packing area (2) is 0.6~0.8.
7. cross-flow type as described in claim 1 drips filter box, it is characterised in that: the water flow of the packing area (2) passes through face and gas
The area ratio that stream passes through face is 1:1~3.
8. band is just like the bio-trickling filter of the drop filter box of cross-flow type described in claim 1~7 any one claim, feature
It is: is equipped with multiple cross-flow types including water tank (6), gas tank (7) and circulation, between the water tank (6) and gas tank (7) and drips
The packing area (2) of filter box, the cabinet is located in gas tank (7), and exhalant region (3) is located in water tank (6), the circulation packet
The water pump (9) for including the aqueduct (8) being connected between the water inlet (11) of cabinet and water tank (6) and being located on aqueduct (8).
9. bio-trickling filter as claimed in claim 8, it is characterised in that: be set side by side between the water tank (6) and gas tank (7)
There are 2~5 cross-flow type drop filter boxs.
10. bio-trickling filter as claimed in claim 9, it is characterised in that: the both ends of the gas tank (7) are respectively equipped with air inlet
(71) and gas outlet (72), the direction of the cabinet upper air-vent (21) is consistent with airflow direction in gas tank (7), the gas tank
(7) sampling hole (73) are equipped with, the water tank (6) is equipped with culture medium entrance (61) and culture medium outlet (62).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499351A (en) * | 2019-01-11 | 2019-03-22 | 四川大学 | Cross-flow type drips the preparation method of filter box and bio-trickling filter and cellular activated carbon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499351A (en) * | 2019-01-11 | 2019-03-22 | 四川大学 | Cross-flow type drips the preparation method of filter box and bio-trickling filter and cellular activated carbon |
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