CN212701282U - Double-layer sealing cover pre-aeration tank and biochemical waste gas treatment system - Google Patents
Double-layer sealing cover pre-aeration tank and biochemical waste gas treatment system Download PDFInfo
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- CN212701282U CN212701282U CN202021037434.6U CN202021037434U CN212701282U CN 212701282 U CN212701282 U CN 212701282U CN 202021037434 U CN202021037434 U CN 202021037434U CN 212701282 U CN212701282 U CN 212701282U
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- cover
- tank
- waste gas
- aeration
- preaeration
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- 238000007789 sealing Methods 0.000 title claims abstract description 161
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- 239000010802 sludge Substances 0.000 claims abstract description 105
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Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Activated Sludge Processes (AREA)
Abstract
The utility model relates to a double-deck closing cap preaeration pond, including preaeration cell body, preaeration pond lid, the cavity lid that closes and form is enclosed by interior closing cap and outer closing cap to the preaeration pond lid, preaeration pond lid and preaeration cell body fixed connection, at least one air vent has been seted up on the interior closing cap, is used for the intercommunication the cavity lid with the preaeration cell body, seted up at least one venthole on the outer closing cap, supply the gas of cavity lid passes through. The invention can be modified by utilizing the prior pre-aeration tank, eliminates the odor generated in the waste water aeration process, and has good effect and simple process operation. Meanwhile, the double-layer sealing cover is beneficial to improving the utilization rate of oxygen in the pre-aeration tank, ensures that the activated sludge in the tank can carry out primary degradation on the wastewater, not only accelerates the degradation of malodorous components in the waste gas, but also accelerates the degradation of harmful substances in the wastewater, and has good effect of degrading pollutants by the wastewater. The utility model also provides a biochemical waste gas treatment system.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, especially, relate to a processing apparatus and system of unorganized emission waste gas among bio-pharmaceuticals waste water biochemical treatment process.
Background
A large amount of wastewater is generated in the chemical and biological pharmaceutical processes, including production wastewater of 6-aminopenicillanic acid, aureomycin, abamectin, coenzyme Q10, amoxicillin, ampicillin, piperacillin, sulbactam and the like, and the wastewater is usually concentrated in a sewage treatment plant in a park for pretreatment and biochemical treatment to meet the industrial discharge requirement. Because the components of the waste water are complex, the waste water contains sulfate radicals, various organic matters, alcohols, hydrogen sulfide and raw materials which are not utilized in fermentation, in the process of treating the waste water, inorganically discharged waste gas containing bad smell, bad smell and peculiar smell can be generated, on one hand, certain influence is caused on the health of human bodies and animals, and on the other hand, harmful substances containing pollution components can pollute soil and environment, and seriously influence the life of residents around factories.
With the continuous improvement of social environmental awareness, treatment measures are gradually adopted by various large sewage treatment plants. At present, the general treatment mode is to collect the waste gas, reduce the concentration of the foul smell through various measures such as alkali spray absorption, incineration, catalytic oxidation and the like, and then discharge the foul smell. One or the combination of two of the above various waste gas treatment processes can effectively improve the environment, but the problems are that: high investment, high operating cost, complex process operation, increased enterprise cost, secondary pollution caused by chemical use and serious influence on the enthusiasm of enterprises for implementing environmental management measures. Therefore, the method for treating the waste water by the waste water treatment process is simple and convenient, saves investment, has good effect and does not generate secondary pollution, and meets the development requirement of the industry.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's defect and not enough, provide a double-deck closing cap preaeration pond, biochemical waste gas treatment system and technology of inorganization emission waste gas among the industrial waste water biochemical treatment process, both satisfied waste water treatment preaeration purpose, can prevent effectively again that the foul gas of preaeration in-process from discharging to the atmosphere to inorganization emission waste gas to the production of preaeration in-process degrades, purification treatment reaches industry emission standard.
In order to realize the above purpose, the utility model provides a double-deck closing cap is aeration tank in advance, including the aeration cell body in advance, the aeration cell lid in advance, the cavity lid that closes and form is enclosed by interior closing cap and outer closing cap to the aeration cell body in advance lid, at least one air vent has been seted up with aeration cell body fixed connection in advance, interior closing cap is used for the intercommunication the cavity lid with the aeration cell body in advance, at least one venthole has been seted up on the outer closing cap, supplies the gas of cavity lid passes through.
According to the utility model discloses an aspect, the preliminary aeration pond lid with carry out sealed fixed connection between the preliminary aeration cell body, sealing material is the adhesion material, and preferably acrylate structural adhesive, two ingredient polyurethane structural adhesives, more preferably two ingredient polyurethane.
According to the utility model discloses an aspect, interior closing cap and outer closing cap are one or polylith integrated into one piece structure or polylith components of a whole that can function independently structure, the junction position sealing connection between adjacent interior closing cap and the outer closing cap, between interior closing cap and the interior closing cap, between outer closing cap and the outer closing cap, preferably adopt seal gasket to pass through bolt or buckle fixed connection.
According to one aspect of the present invention, the inner sealing cover is provided with 1 or more drain holes communicating with the pre-aeration tank body relative to the lowest position of the bottom of the pre-aeration tank body; the drain hole is round, rectangular, square or irregular, preferably circular, and has a diameter of 10-50 mm.
According to an aspect of the present invention, the drainage hole is provided at an edge of the inner cover, preferably distributed at two symmetrical side edges of the inner cover.
According to an aspect of the invention, the longitudinal cross section of the inner and/or outer cap is semi-elliptical, semi-circular, curved or triangular.
According to the utility model discloses an aspect, the venthole is seted up at outer closing cap top, supplies the gas of cavity lid passes through, the venthole cross section is oval, circular, arc, square or irregular shape, and preferably circular, the diameter of venthole is 100 ~ 200 mm.
According to one aspect of the present invention, the air outlet hole at the top of the outer cover and the air vent hole and/or the water drain hole below the air outlet hole at the top of the inner cover or near the top are arranged in a staggered manner, and the horizontal distance is 0.1-1m, preferably 0.5-1 m.
According to one aspect of the utility model, the fixed sealing connection of vent department on the outer closing cap has waste gas collection device for collect come from waste gas in the preliminary aeration pond lid.
According to one aspect of the present invention, the height difference between the center of the concave surface of the inner cap and the edge of the inner cap is 30-100cm, preferably 50 cm; the height difference h1 between the concave center of the outer cap and the inner surface center of the inner cap is 50-100cm, preferably 80 cm.
According to an aspect of the utility model, still be equipped with first mud back flow on the pool wall of the preliminary aeration cell body, be used for to provide backward flow mud, preferably sedimentation tank activated sludge in the double-deck closing cap preliminary aeration tank.
According to one aspect of the utility model, a first wastewater inlet pipe and a first wastewater outlet pipe are arranged on the wall of the pre-aeration tank body; the wastewater is from a wastewater or wastewater mixture received at a plant or outside; and the wastewater treated by the double-layer seal cover preaeration tank enters a subsequent process for treatment.
According to one aspect of the utility model, install first aeration equipment in the aeration tank body in advance, be used for to expose to the sun in the double-deck closing cap aeration tank in advance.
According to an aspect of the present invention, the material of the sealing cover is made of corrosion-resistant material, preferably glass fiber reinforced plastic material.
According to the utility model discloses an aspect, waste gas collection device includes first waste gas collecting pipe, second waste gas collecting pipe and the first draught fan of sequence connection, first waste gas collecting pipe inlet end with sealed intercommunication between the venthole on the outer closing cap of double-deck closing cap preaeration pond.
According to an aspect of the utility model, it has first swirler and third waste gas collecting pipe still to communicate in proper order between second waste gas collecting pipe and the first draught fan, the end of giving vent to anger of first swirler with the inlet end intercommunication of third waste gas collecting pipe, the liquid of first swirler separation is through connecting first whirl back flow warp on the first swirler pre-aeration tank lid and/or pre-aeration tank body return double-deck closing cap pre-aeration tank.
According to the utility model discloses an aspect, first exhaust gas collecting pipe inlet end with adopt seal gasket sealing fixed connection between the venthole, seal gasket is adhesion material, and preferably acrylate structure is glued, two ingredient polyurethane structures are glued, more preferably two ingredient polyurethane.
According to the utility model discloses an aspect, first exhaust gas collecting pipe inlet end with carry out sealed fixed connection between the outside protruding portion that sets up of pond lid, seal gasket is the adhesion material, and preferably acrylate structure is glued, two ingredient polyurethane structure are glued, more preferably two ingredient polyurethane.
The utility model also provides a biochemical waste gas treatment system, including the above-mentioned arbitrary one of order connection double-deck closing cap preaeration pond, good oxygen pond and exhaust emission device, at least one exhaust hole has been seted up at the lid top in good oxygen pond, exhaust emission device installs exhaust hole department.
According to the utility model discloses an aspect, good oxygen pond is good oxygen pond for spraying, including good oxygen cell body, good oxygen pond lid, mud spray set, good oxygen pond lid with the sealed fixed connection of good oxygen cell body, good oxygen pond is covered to be connected with mud spray set, be used for to spray activated sludge in the good oxygen pond.
According to the utility model discloses an aspect, mud spray set to spray the waste gas of liquid level top in the aerobic tank and spray and form once degradation waste gas behind the activated sludge.
According to the utility model discloses an aspect, mud spray set sprays liquid straw, mud including the order is connected and sprays pump, mud and spray the person in charge, mud spray branch pipe, mud shower head, the entry end submergence that sprays the liquid straw is in spray below the liquid level in the aerobic tank, preferably arrange spray the position that the aerobic tank bottom is close to the pool wall, more preferably be close to aerobic tank bottom waste water outlet end.
According to an aspect of the utility model, the mud shower head is the atomizing shower head.
According to the utility model discloses an aspect the mud sprays the branch pipe with still be connected with mud between the mud shower head and spray the branch pipe, mud sprays the branch pipe and falls into all the way or multichannel distribution along the horizontal direction and be in good oxygen pond lid below, preferably evenly distributed is in good oxygen pond lid below distance good oxygen pond liquid level 1 ~ 3m department sprays.
According to one aspect of the present invention, the inlet end of the spray liquid suction pipe is further connected to a spray liquid filtering device for filtering the blockage entering the spray liquid suction pipe; the plug is rubbish, leaf, large granule debris.
According to the utility model discloses an aspect, it is cylinder, spheroid or cuboid stainless steel cage to spray liquid filter equipment, it has a plurality of filtration pores to distribute on the cage, preferably the outside parcel of cage has at least one deck stainless steel mesh.
According to the utility model discloses an aspect, mud sprays the branch pipe and exposes install branch pipe valve, manometer or flowmeter, branch pipe filter on the pipeline of good oxygen pond lid top in proper order, manometer or flowmeter with branch pipe filter all detachably installs on the mud sprays the branch pipe.
According to one aspect of the utility model, the good oxygen pond is covered and has been seted up the peep hole for observe the inside of spraying good oxygen pond the mud shower head.
According to one aspect of the utility model, the spraying aerobic tank further comprises a waste gas aeration device, which is used for spraying the waste gas which is aerated into the spraying aerobic tank.
According to an aspect of the utility model, it is right to spray good oxygen pond the mud spray set waste gas of waste gas aeration equipment input sprays activated sludge in order to form once degrading waste gas.
According to an aspect of the present invention, the waste gas aeration device is connected to the waste gas collecting device, through the first draught fan to the input of the spray aerobic tank is received from the waste gas of the double-layer cover pre-aeration tank, the air pressure of the first draught fan is 3-60 KPa.
According to an aspect of the utility model, waste gas aeration equipment is including the waste gas aeration house steward, the waste gas aeration person in charge, waste gas aeration branch pipe and the waste gas aeration head of order intercommunication, be used for to input waste gas in the good oxygen cell body.
According to an aspect of the utility model, the waste gas aeration head distributes in the good oxygen cell body waste water liquid level below 0.3 ~ 5.0 m.
According to the utility model discloses an aspect, still be equipped with second waste water oral siphon and second waste water outlet pipe on the pool wall of good oxygen cell body, the muddy water mixed liquid of second waste water for coming from the sedimentation tank.
According to one aspect of the utility model, a second aeration device is arranged in the aerobic tank body and used for aerating air in the spraying aerobic tank.
According to an aspect of the utility model, the exhaust hole department fixed seal on the good oxygen pond lid is connected with exhaust emission device for collect come from the one-time degradation waste gas that overflows in the good oxygen pond of spraying.
According to an aspect of the utility model, exhaust emission device includes waste gas collection device, alkali spray column, water spray tank, second draught fan and the unloading chimney that connects in proper order.
According to an aspect of the utility model, waste gas collection device includes first gas collecting pipe, second gas collecting pipe and the second swirler of connecting in proper order, the inlet end of first gas collecting pipe with fixed sealed intercommunication between the exhaust hole on the good oxygen pond lid.
According to an aspect of the present invention, the first gas collecting pipe is one or more pipes.
According to an aspect of the present invention, the second gas header collects the gas from the first gas header and feeds into the second cyclone.
According to one aspect of the utility model, the end intercommunication of giving vent to anger of second swirler has the third gas collecting pipe, the liquid of second swirler separation is returned through connecting second whirl back flow on the second swirler spray good oxygen pond and/or double-deck closing cap preliminary aeration pond.
According to the utility model discloses an aspect, the second swirler is one or many that connect in proper order, second draught fan wind pressure is 1.0-3.0 KPa.
According to one aspect of the utility model, the second cyclone return pipe is communicated with the second return pipe, and the liquid separated by the second cyclone is returned to the spraying aerobic tank and/or the double-layer cover preaeration tank.
According to the utility model discloses an aspect, first discharge inlet with adopt sealed the sealed fixed connection that seals between the exhaust hole, sealed the pad for the adhesion material, preferably acrylate structure is glued, two ingredient polyurethane structure are glued, more preferably two ingredient polyurethane.
According to the utility model discloses an aspect, first discharge inlet with go on sealed fixed connection between the outer convex part that good oxygen pond lid outside set up, sealed the pad is the adhesion material, and preferably acrylate structure is glued, two ingredient polyurethane structure are glued, more preferably two ingredient polyurethane.
According to an aspect of the utility model, first discharge inlet end with the outside evagination terminal surface that good oxygen pond lid outside set up adopts bolt or the fixed butt joint of buckle.
According to an aspect of the utility model, the air inlet end of the first gas collecting pipe is sleeved on the outer convex part arranged outside the aerobic pool cover and is fixedly connected with the outer convex part.
According to an aspect of the utility model, the first discharge inlet inserts the outer convex part internal fixation who sets up outside the good oxygen pond lid connects.
According to one aspect of the utility model, the liquid separated by the first cyclone on the waste gas collecting device returns to the spraying aerobic tank through the first backflow pipe and/or the first backflow branch pipe communicated with the first cyclone backflow pipe.
According to an aspect of the utility model, in the alkali spray tower, through the alkali lye that the alkali spray tower top sprayed is right come from the waste gas of third gas collecting pipe carries out the alkali and sprays in order to form the secondary and degrade waste gas.
According to the utility model discloses an aspect, the secondary degradation waste gas is followed alkali spray column top or upper portion are escaped, get into alkali spray column gas collecting pipe, the liquid that sprays through alkali by the alkali spray column liquid collecting pipe of alkali spray column bottom gets into the second back flow and returns spray good oxygen pond and/or double-deck closing cap preliminary aeration pond.
According to the utility model discloses an aspect the third gas collecting pipe gets into on the pipeline of alkali spray tower, and alkali spray tower gas collecting pipe leaves install waste gas PH on-line measuring ware on the pipeline of alkali spray tower.
According to one aspect of the present invention, the exhaust gas has a PH of 5.5-6.0 before entering the alkali spray tower and a PH of 6.8-7.2 after leaving the alkali spray tower.
According to an aspect of the utility model, the water spray tank passes through the water that the water spray tank top sprayed is right come from the secondary degradation waste gas of alkali spray tower gas collecting pipe washes, adjusts the washing gas PH to be neutral.
According to an aspect of the utility model, the washing gas is followed water spray tank top or upper portion are escaped, get into water spray tank discharge, and the liquid through the washing by the water spray tank liquid collecting pipe of water spray tank bottom gets into the second back flow and returns spray good oxygen pond and/or double-deck closing cap preliminary aeration pond.
According to an aspect of the present invention, the water spray tank gas manifold leaves the water spray tank pipeline is provided with an exhaust gas PH on-line detector.
According to one aspect of the invention, the second draught fan sends the washing gas from the water spray box header to the emptying chimney for discharge.
Compared with the prior art, the utility model, following beneficial effect has:
1) the utility model discloses, usable current wastewater treatment plant's preaeration pond is reformed transform and is added double-deck closing cap and become double-deck closing cap preaeration pond, the good oxygen pond that utilizes current wastewater treatment plant adds the closing cap and reforms transform into spraying good oxygen pond, seal through conventional sealing material, the inorganization waste gas discharge problem of high concentration organic waste water in-process production because of the aeration has been eliminated preaeration pond and good oxygen pond, the foul smell has been eliminated on the spot, especially, the mixed waste water of bio-pharmaceuticals fermentation is mixing and the preliminary treatment in-process entering the preaeration pond, produce the foul gas that leads to of chemical reaction when mixing the aeration because of waste water, the emission investment is economized, and is effectual, and the process operation is simple. .
2) The double-layer sealing cover preaeration tank of the utility model is sealed by the double-layer sealing cover, and the height difference between the center of the concave surface of the inner sealing cover and the edge of the inner sealing cover forms a middle part with a high periphery and a low periphery, which is beneficial to the rapid collection of waste gas generated in the preaeration tank; a height difference is kept between the center of the concave surface of the outer sealing cover and the center of the inner surface of the inner sealing cover, so that firstly, the hollow cover body is ensured to have an enough accommodating cavity, the air pressure in the pre-aeration tank can be buffered and sealed, and the phenomenon that the air pressure in the pre-aeration tank is changed too much due to the suction action of negative pressure after an induced draft fan is started, and the pre-aeration treatment effect is influenced due to the violent change of the concentration of dissolved oxygen in the pre-aeration tank; compared with single-layer sealing, the pressure resistance of the double-layer sealing cover is improved, the double-layer sealing cover properly increases the air pressure in the pre-aeration tank, the utilization rate of oxygen in the pre-aeration tank is improved, the activated sludge with microbial flora in the tank is guaranteed to carry out primary degradation on wastewater, more pollutants are degraded, and the actual using effect is better than that of a single-layer sealing structure; and thirdly, the pre-aeration can also transfer part of volatile organic pollutants and organic components which are difficult to degrade from a liquid phase to a gas phase, the wastewater treatment pressure of the pre-aeration tank is reduced by shunting the pollutants, the shunting treatment is realized by the waste gas collecting device, and the waste gas enters the spraying aerobic tank at the rear end for forced aerobic biological treatment, so that the degradation of waste gas is accelerated, and the degradation of harmful substances in the wastewater can be accelerated.
3) The utility model discloses an activated sludge to among the double-deck closing cap aeration tank in advance flows back and uses to keep the activated sludge concentration relatively stable in the pond of preaeration, reduce the impact of high enriched waste water to the pond of preaeration simultaneously, be favorable to the even running in the pond of preaeration.
4) The utility model discloses a double-deck closing cap preaeration pond, dislocation set between the venthole at closing cap top in the venthole below and the venthole of outer closing cap top and/or wash port keeps the horizontal distance between two holes to be separated by 0.1-1m, can prevent to form the air current short current between the two-layer closing cap, leads to reducing preaeration exhaust-gas treatment effect. Meanwhile, the discharged waste gas in the hollow cover body of the double-layer sealing cover preaeration tank is favorably interfered by the dislocation of the two layers of sealing covers communicated with the pipe holes when entering the hollow cover body, so that condensed water is generated on the inner surface of the hollow cover body, the pressure of a rear end induced draft fan is reduced, the corrosion to parts of the induced draft fan is slowed down, the service life of the induced draft fan is prolonged, the failure rate of the induced draft fan is reduced, and the material consumption of the next process is reduced.
5) The utility model discloses a double-deck closing cap preaeration pond, outer closing cap and interior closing cap longitudinal cross section can adopt ellipse, semicircle or arc structure, can avoid appearing the air current dead angle and result in the not good enough and outer closing cap and interior closing cap bearing pressure inequality and the problem that splits.
6) The utility model discloses a double-deck closing cap preaeration pond, the wash port that interior closing cap edge was minimum or was close to the lower and offered, the comdenstion water that gets into the cavity lid in the waste gas of will arranging is retrieved to preaeration pond, install the swirler on waste gas collection device and the exhaust emission device, can carry out gas-liquid separation with the liquid that carries in the waste gas, the rear end draught fan pressure has been alleviateed, the corruption to the draught fan part has been slowed down, the life-span of the draught fan is prolonged, the fan fault rate is reduced, reduce the material consumption of next process simultaneously. In addition, the liquid separated by the first cyclone returns to the preaeration tank through the preaeration tank cover by the first cyclone return pipe connected to the first cyclone, and the condensate separated by the first cyclone can be used for naturally cleaning the drain hole.
7) The utility model discloses an aerobic tank bottom installation air aeration equipment, the air gets into good oxygen pond through this aeration equipment, and good oxygen mud degrades COD, nitrogen oxide, sulphide etc. in the waste water in aerobic environment to absorb, decompose, the conversion to the material microorganism that is of flavor in the waste gas of exposing to the sun simultaneously at this in-process, realized the further degradation to the harmful substance in the waste gas, improve the exhaust-gas treatment effect. The aerobic tank can continuously provide microbial flora for wastewater and waste gas treatment, ensures the continuity of waste gas treatment, does not need to additionally add new flora and nutrient substances, and has low operation cost.
8) The utility model discloses an it can also play the pond in waste water fully to mix the effect to spray good oxygen pond through waste gas and the two aeration of air, lets the partly foul gas that does not in time degrade escape the liquid level and degrades again with the mud contact that sprays above the cell body, has improved waste gas degradation effect in the waste water.
9) The utility model discloses an it sprays mud to spray good oxygen pond and use the atomizing shower head, can increase the area of contact of the activated sludge who sprays and waste gas, and in liquid-gas contact process, atomizing mud degrades the harmful substance in the waste gas of effusion liquid level once more, reaches better exhaust-gas treatment effect.
10) The utility model discloses an it filters through spraying liquid filter equipment and branch pipe filter two-stage earlier to spray with activated sludge before spraying, can filter the plug such as rubbish, leaf, large granule debris that get into spray branch pipe and shower head, has protected the atomizing shower head, has improved the steady operation performance of system.
11) The utility model discloses a spray branch pipe and atomizing shower head and carry out the multichannel, evenly arrange in good oxygen pond lid below, can increase between waste gas and activated sludge liquid-gas area of contact and improve the effect of spraying the treatment degradation waste gas.
12) The utility model discloses an installation manometer or flowmeter, branch pipe filter and atomizing shower head all connect through the loose joint on the spray branch, are convenient for maintain or change, when manometer demonstration pressure rose, or when the flowmeter shows that the flow reduces, can judge when this branch pipe atomizing spray nozzle takes place to block up, at this moment can close the valve on this branch road, maintain or change, improved work efficiency.
13) The utility model discloses an assemble the peep hole on the good oxygen pond lid near every atomizing spray nozzle group, spray nozzle flow size through peep hole direct observation atomizing, also can judge whether atomizing spray nozzle blocks up, conveniently maintains or changes, has avoided the periodic disassembly mud shower head inspection, has improved work efficiency.
14) The utility model removes acidic substances such as H2S and the like in the primary degraded waste gas and flavor substances which can be absorbed by alkali liquor through alkali spraying, thereby realizing further purification of the waste gas; the PH of the waste gas is adjusted from 5.5 to 6.0 to 6.8 to 7.2 after alkali spraying, and the PH of the washing gas is adjusted to be neutral after washing by water.
15) After the waste gas treatment process of the utility model, the concentration of the waste gas and the odor generated by the pre-aeration tank is 2000-ion 2400 (dimensionless), the concentration of the odor at the discharge port of the final emission chimney is reduced to 200-ion 300 (dimensionless), and the odor treatment effect is obvious.
16) Adopt the utility model discloses a waste gas treatment process not only can solve waste gas and simply adopt alkali to spray the unobvious technical defect of treatment effect, can solve again that tradition burns, catalytic oxidation, biological method etc. one kind or multiple combination formula technology investment is big, the running cost is high, operate complicated problem, has reduced the cost in business, has alleviateed the secondary pollution who produces in the chemical use.
Drawings
FIG. 1 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 1;
FIG. 2 is an enlarged schematic view of a double-covered preaeration tank A according to embodiment 1;
FIG. 3 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 2;
FIG. 4 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 3;
FIG. 5 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 4;
FIG. 6 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 5;
FIG. 7 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 6;
FIG. 8 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 7;
FIG. 9 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 8;
FIG. 10 is a schematic top view of the structure of two adjacent external sealing covers of the double-layer sealing cover preaeration tank in the embodiment 9;
FIG. 11 is a schematic top view of a cover of a single cover plate of a pre-aeration tank with a double-layer cover according to embodiment 9;
FIG. 12 is a schematic top view of the capping structure of the double-capped preaeration tank in accordance with embodiment 10;
FIG. 13 is a schematic top view of a double-deck lid cover structure of a pre-aeration tank in accordance with embodiment 11;
FIG. 14 is a schematic view showing the structure of a double-covered preaeration tank according to embodiment 12;
FIG. 15 is a schematic view of a biochemical waste gas treatment system and process according to an embodiment of the present invention;
FIG. 16 is a schematic view of a spray aerobic tank according to the embodiment of FIG. 15;
FIG. 17 is a schematic view of a biochemical waste gas treatment system and process according to another embodiment of the present invention;
FIG. 18 is a schematic view of a spray aerobic tank according to the embodiment of FIG. 17;
FIG. 19 is a schematic top view of an exhaust gas aeration apparatus and an aeration line configuration according to the embodiment of FIG. 17;
fig. 20 is a top view of a sludge spraying device and a spraying pipeline structure according to the embodiment of fig. 17.
In the figure: a double-layer sealing cover preaeration tank 1, a spraying aerobic tank 2, an alkali spray tower 3, a water spray tank 4, a second induced draft fan 5, an induced draft pipe 6, an air discharge chimney 7, a preaeration tank body 10, a preaeration tank cover 11, a sealing gasket 12, a bolt 13, a first aeration device 14, a first wastewater inlet pipe 15, a first wastewater outlet pipe 16, a waste gas collecting device 17, a sealant 18, a first sludge return pipe 19, an aerobic tank body 20, an aerobic tank cover 21, a waste gas aeration device 22, a second wastewater inlet pipe 23, a second aeration device 24, a second wastewater outlet pipe 25, a first return pipe 26, a first return branch pipe 27, a waste gas collecting device 28, a sludge spraying device 29, an alkali spray tower liquid collecting pipe 32, an alkali spray tower gas collecting pipe 33, a water spray tank liquid collecting pipe 42, a water spray tank gas collecting pipe 43, an inner sealing cover 111, an outer sealing cover 110, a drain hole 112, a vent hole 113, a protruding part 114, an air outlet 115, a joint 116, a first main aeration pipe 141, a first branch aeration pipe 142, a first aeration head 143, a first waste gas collecting pipe 171, a second waste gas collecting pipe 172, a first cyclone 173, a third waste gas collecting pipe 174, a first cyclone return pipe 175, a first induced draft fan 176, an outer convex portion 211, an air outlet 212, a sealing material 213, a sealing gasket 214, a buckle 215, a main waste gas aeration pipe 220, a main waste gas aeration pipe 221, a branch waste gas aeration pipe 222, a branch waste gas aeration pipe 223, a waste gas aeration head 224, a second main aeration pipe 241, a second branch aeration pipe 242, a second aeration head 243, a first air collecting pipe 281, a second air collecting pipe 282, a second cyclone 283, a third air collecting pipe 284, a second cyclone return pipe 285, a waste liquid collecting pipe 286, a second return pipe 287, a spray liquid filtering device 291, a spray liquid suction pipe 292, a sludge spray pump 293, a sludge spray main pipe 294, a sludge spray branch pipe 295, a branch valve 296, a pressure gauge 297, a sludge spray branch pipe 298 and a sludge spray header 299.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.
Fig. 1 is a schematic structural view of a double-sealed cover preaeration tank according to embodiment 1 of the present invention. As shown in fig. 1, the double-layer cover-sealed pre-aeration tank 1 comprises a pre-aeration tank body 10 and a pre-aeration tank cover 11, wherein the pre-aeration tank cover 11 is a hollow cover body formed by enclosing an inner cover 111 and an outer cover 110, the part of the pre-aeration tank cover 11, which is in contact with the pre-aeration tank body 10, is fixedly connected in a sealing manner, and sealing materials are adopted as adhesion materials, preferably acrylate structural adhesive and two-component polyurethane structural adhesive, and more preferably two-component polyurethane. The central position of the inner sealing cover 111 is provided with a vent hole 113 with a rectangular cross section, the vent hole 113 is communicated with the hollow cover body and the pre-aeration tank body 10, and the cross section area of the vent hole 113 is 20-300cm2. The upper top of the outer cap 110 is provided with aThe gas outlet holes 115 are used for the gas of the hollow cover body to pass through, the cross section of each gas outlet hole 115 is circular, or can be in an oval shape, an arc shape, a square shape or an irregular shape, and the diameter of each gas outlet hole 115 is 100 mm.
In embodiment 1, a first wastewater inlet pipe 15 and a first wastewater outlet pipe 16 are installed on the wall of the pre-aeration tank body 10. The pre-aeration tank body 10 is internally provided with a first aeration device 14 for aerating air into the double-layer cover pre-aeration tank 1, the first aeration device 14 comprises a first main aeration pipe 141, a first branch aeration pipe 142 and a first aeration head 143 which are sequentially connected, the first main aeration pipe 141 is arranged on the wall of the pre-aeration tank body 10, the first branch aeration pipe 142 is communicated with the first main aeration pipe 141, extends into and is distributed at the bottom of the pre-aeration tank body 10, and the first aeration head 143 is connected to the first branch aeration pipe 142.
In embodiment 1, a pre-aeration tank of an existing wastewater treatment plant is modified, the pre-aeration tank body 10 is cylindrical, part of the tank body is arranged below the ground, a double-layer sealing cover is added, an inner sealing cover 111 and an outer sealing cover 110 are integrated into a whole, the joint between the inner sealing cover 111 and the outer sealing cover 110 is hermetically connected, and the pre-aeration tank body is sealed by a conventional two-component polyurethane sealing material. Before the transformation, high concentration waste water especially the mixed waste water of bio-pharmaceuticals fermentation is getting into the mixed and pretreatment processes in the preliminary aeration pond, produce the leading-in of chemical reaction and produce a large amount of foul gas when the waste water mixes the aeration, the back of transformation, because double-deck closing cap has been set up, sealed processing has been carried out between preliminary aeration cell body 10 and the preliminary aeration cell lid 11, the unorganized waste gas emission problem that the preliminary aeration pond handled high concentration organic waste water in-process because of the aeration production has been eliminated, the foul smell has been eliminated on the spot, the project transformation is with little investment, it is economized in the emission investment, and is effectual, and the process operation is simple.
In the embodiment 1, the pre-aeration tank is sealed by the double-layer sealing cover, so that the air pressure in the pre-aeration tank can be buffered and sealed, and the concentration of dissolved oxygen in the pre-aeration tank is prevented from being changed too much to influence the pre-aeration treatment effect. In addition, for the individual layer is sealed, the crushing resistance of double-deck closing cap improves, can suitably increase the interior air pressure of pre-aeration tank, helps improving the utilization ratio of oxygen in the pre-aeration tank, has ensured that the activated sludge that has the microbial community in the pond carries out preliminary degradation to waste water, and the degradation pollutant is more, and the actual result of use is superior to individual layer seal structure. And aeration can also transfer part of volatile organic pollutants and organic components difficult to degrade from a liquid phase to a gas phase, through the shunting of the pollutants, the pressure of wastewater treatment of the pre-aeration tank is reduced, the shunting treatment is realized through a waste gas collecting device, and the wastewater enters the rear-end waste gas treatment, so that the degradation of waste gas is accelerated, and the degradation of harmful substances in the wastewater can be accelerated.
In embodiment 1, the outer cover 110 is provided with a protrusion 114 with two open ends at the air outlet hole 115 towards the outside of the pre-aeration tank cover 11, and the exhaust gas collecting device 17 is fixed at the air outlet hole 115 on the outer cover 110 for collecting the exhaust gas entering the pre-aeration tank cover 11. The waste gas collecting device 17 comprises a first waste gas collecting pipe 171, a second waste gas collecting pipe 172 and a first induced draft fan 176 which are connected in sequence, wherein a sealant 18 is adopted between the air inlet end of the first waste gas collecting pipe 171 and the air outlet hole 115 on the outer sealing cover 110 of the pre-aeration tank for sealing and communicating, and the sealing material is an adhesion material, preferably acrylate structural adhesive and two-component polyurethane structural adhesive, and more preferably two-component polyurethane. When the pre-aeration tank cover 11 is installed, the air inlet end of the first exhaust gas collection pipe 171 is inserted into the protrusion 114 arranged outside the pre-aeration tank cover and fixed, the gap between the protrusion and the protrusion is sealed and connected through the sealant 18, and the sealing material is two-component polyurethane. The first exhaust collection pipe 171 is a pipe. The air pressure of the first induced draft fan 176 is 3-60 Kpa.
In embodiment 1, the air outlet 115 at the top of the outer cap 110 and the air vent 113 at or near the top of the inner cap 111 below the air outlet 115 are disposed in a staggered manner, and the horizontal distance between the two holes is 0.5m, so that when the first induced draft fan 176 is turned on and the exhaust gas generated in the pre-aeration tank is sucked by negative pressure in the first exhaust gas collecting pipe 171, short air flow between the two caps can be prevented, which results in a reduction in the pre-aeration exhaust gas treatment effect. Meanwhile, the outer exhaust gas in the hollow cover body of the double-layer sealing cover preaeration tank 1 is favorably prevented from being disturbed by the dislocation of the two layers of sealing cover communicating pipe holes when entering the hollow cover body, so that condensed water is generated on the inner surface of the hollow cover body, the pressure of a rear end induced draft fan is reduced, the corrosion to parts of the induced draft fan is slowed down, the service life of the induced draft fan is prolonged, the failure rate of the induced draft fan is reduced, and the material consumption of the next procedure is reduced.
In embodiment 1, the double-covered pre-aeration tank 1, the outer cover 110 and the inner cover 111 are designed to have an arc-shaped structure with a high center and low edges in a longitudinal cross section, so that the problems of poor operation effect caused by dead corners of air flow and cracking caused by uneven bearing pressure of the outer cover 110 and the inner cover 111 when waste gas generated in the pre-aeration tank is sucked can be avoided.
In embodiment 1, the height difference between the center of the concave surface of the inner cover 111 and the edge of the inner cover 111 is 30cm, and the height of the center is lower than the height of the periphery, which is beneficial to the rapid collection of the waste gas generated in the double-cover preaeration tank 1. The height difference h1 between the center of the concave surface of the outer sealing cover 110 and the center of the inner surface of the inner sealing cover 111 is 50cm, the height difference is kept, the hollow cover body of the double-layer sealing cover preaeration tank 1 can be ensured to have an enough accommodating cavity, the air pressure in the sealed double-layer sealing cover preaeration tank 1 can be buffered, the phenomenon that the air pressure in the double-layer sealing cover preaeration tank 1 is changed too much due to the negative pressure suction effect after the first draught fan 176 is opened is prevented, and the influence on the preaeration treatment effect due to the violent change of the dissolved oxygen concentration in the double-layer sealing cover preaeration tank 1 is ensured.
Fig. 2 is an enlarged schematic view of a double-covered preaeration tank 1 according to embodiment 1 of the present invention at a. As shown in FIG. 2, the inner sealing cover 111 and the outer sealing cover 110 are integrally formed, and the pre-aeration tank cover 11 and the pre-aeration tank body 10 are fixedly connected by the sealing gasket 12 through the bolt 13, so that the leakage of waste gas in the pre-double-layer sealing cover pre-aeration tank 1 can be eliminated. Circular drain holes 112 with the diameter of 10mm are uniformly distributed at intervals along the edge of the inner sealing cover 111 at the lowest part of the edge of the inner sealing cover 111, and the distance between every two adjacent drain holes 112 is preferably 5-30 cm, and more preferably 5-10 cm. The material of the sealing cover is made of corrosion-resistant material, preferably glass fiber reinforced plastic material. The design drain hole 112 can recycle the condensed water in the hollow cover body of the double-layer sealing cover preaeration tank 1, which enters the outer exhaust gas, to the double-layer sealing cover preaeration tank 1, so that the pressure of the first draught fan 176 at the rear end can be reduced, the corrosion to the components of the first draught fan 176 is slowed down, the service life of the draught fan is prolonged, the failure rate of the draught fan is reduced, and the material consumption of the next process is reduced.
Fig. 3 is a schematic structural view of a double-sealed cover preaeration tank according to embodiment 2 of the present invention. The difference from embodiment 1 is mainly as follows:
as shown in fig. 3, a pre-aeration tank cover 11 of a double-layer sealing cover pre-aeration tank 1 is fixedly connected with a pre-aeration tank body 10 by a fastener, an inner sealing cover 111 and an outer sealing cover 110 are of a multi-block integrally formed structure, that is, a monomer cover plate formed by the inner sealing cover 111 and the outer sealing cover 110 is of an integrally formed sealing structure at an edge joint part, a plurality of monomer cover plates are overlapped and hermetically connected by edges to form a complete pre-aeration tank cover 11, the sealing connection adopts a sealing gasket, and the sealing gasket is fixedly connected by a bolt or a fastener, is an adhesion material, is preferably acrylate structural adhesive, is preferably double-component polyurethane structural adhesive, and is more preferably double-component polyurethane. In embodiment 2, the joints between the inner and outer covers 111 and 110, between the inner and outer covers 111 and 111, and between the outer and outer covers 110 and 110, which constitute the complete pre-aeration tank cover 11, are hermetically connected, preferably by using sealing gaskets and fixing them by bolts or snaps. Compared with the embodiment 1, the pre-aeration tank cover 11 is formed by combining a plurality of single cover plates, so that the design and the manufacture of the double-layer cover-sealing pre-aeration tank 1 with overlarge scale and size are more convenient.
In embodiment 2, the cross-sectional shape of the vent hole 113 opened in the inner lid 111 is circular. The inner sealing cover 111 is provided with 1 or more drain holes corresponding to the lowest part of the bottom of the pre-aeration tank body 10, the drain holes 112 are rectangular, square or irregular, and the diameter of the drain holes 112 is 10-50 mm. An oval air outlet 115 is formed in the top of the outer sealing cover 110, and the diameter of the air outlet 115 is 200mm, so that air in the hollow cover body can pass through the air outlet. The air outlet hole 115 at the top of the outer sealing cover 110 and the vent hole 113 at the top of the inner sealing cover 111 or near the top below the air outlet hole 115 are arranged in a staggered mode, the horizontal distance between the two holes is 1m, and therefore the air flow short flow formed between the two sealing covers can be prevented, and the pre-aeration waste gas treatment effect can be reduced.
In embodiment 2, the height difference between the center of the concave surface of the inner cover 111 and the edge of the inner cover 111 is 50-100cm, preferably 50cm, and the height of the middle is lower than the height of the periphery, which is more beneficial to the rapid collection of the waste gas generated in the pre-aeration tank. The height difference h1 between the center of the concave surface of the outer seal cover 110 and the center of the inner surface of the inner seal cover 111 is 80-100 cm, preferably 80 cm. By combining the scale of the actual on-site pre-aeration tank and designing the monomer cover plate according to the above-mentioned preferred size of the embodiment 2, the actual pre-aeration effect is the best, that is, the height difference of 80cm is maintained, so that it can be ensured that the hollow cover body of the double-layer cover pre-aeration tank 1 has a sufficient accommodating cavity, and the air pressure inside the double-layer cover pre-aeration tank 1 can be buffered, thereby preventing the air pressure inside the double-layer cover pre-aeration tank 1 from changing too much due to the negative pressure suction after the first draught fan 176 is opened, and preventing the abrupt change of the dissolved oxygen concentration in the pre-aeration tank from affecting the pre-aeration treatment effect.
In embodiment 2, the air inlet end of the first waste gas collecting pipe 171 is fixedly abutted with the end surface of the protrusion 114 provided on the outer sealing cover 110 by bolts or fasteners, a first cyclone 173 and a third waste gas collecting pipe 174 are sequentially communicated between the second waste gas collecting pipe 172 and the first induced draft fan 176, the air outlet end of the first cyclone 173 is communicated with the air inlet end of the third waste gas collecting pipe 174, and the liquid separated by the first cyclone 173 returns to the double-sealing cover pre-aeration tank 1 through the pre-aeration tank body 10 by a first cyclone return pipe 175 connected to the first cyclone 173. The first swirler 173 is installed on the waste gas collecting device 17, so that liquid carried in waste gas can be subjected to gas-liquid separation, the pressure of the first draught fan 176 at the rear end is reduced, the corrosion to components of the draught fan is reduced, the service life of the draught fan is prolonged, the failure rate of the draught fan is reduced, and the material consumption of the next procedure is reduced.
In embodiment 2, the wall of the pre-aeration tank 10 is further provided with a first sludge return pipe 19 for supplying return sludge from the sedimentation tank to the double-layer closed-cover pre-aeration tank 1. In addition, the activated sludge in the double-layer sealing cover preaeration tank 1 is also used in a backflow mode, so that the activated sludge concentration of the double-layer sealing cover preaeration tank 1 is kept relatively stable, meanwhile, the impact of high-concentration wastewater on the double-layer sealing cover preaeration tank 1 is reduced, and the stable operation of the double-layer sealing cover preaeration tank 1 is facilitated.
Fig. 4 is a schematic structural view of a double-sealed cover preaeration tank according to embodiment 3 of the present invention. The differences from embodiment 2 are mainly 2 aspects as follows:
first, the pre-aeration tank cover 11 of the double-layer closed-cover pre-aeration tank 1 has a different structure. In embodiment 3, the inner cover 111 of the pre-aeration tank cover 11 has a low center and a high edge, i.e. the integrally formed single cover plate has a structure in which the inner cover 111 protrudes outward, so that a plurality of single cover plates are overlapped and sealed at the edge to form the complete pre-aeration tank cover 11, which is similar to a spindle, and the hollow cover body has a large cavity. The vent holes 113 are arranged on the edge of the inner cover 111, preferably symmetrically distributed on the edge of the inner cover 111, and the cross-sectional area of the circular vent holes 113 is 20-300cm2A circular drain hole 112 having a diameter of 10mm is formed in the central bottom of the inner cover 111.
The cover plate design has the advantages that condensate in the hollow cover body can be conveniently gathered and returned to the double-layer sealing cover preaeration tank 1, the drain holes 112 are convenient to clean, in addition, for the cylindrical double-layer sealing cover preaeration tank 1, the vent holes 113 are formed in the edges of the two symmetrical sides of the inner sealing cover 111, the staggered arrangement between the vent holes 115 in the top of the outer sealing cover 110 and the vent holes 113 in the edge of the inner sealing cover 111 below the vent holes 115 is easier, the horizontal distance between the two holes is better realized by being more than 1m, short airflow can be effectively prevented from being formed between the two layers of sealing covers, and the pre-aeration waste gas treatment effect is improved.
In addition, the height difference between the center of the concave surface of the inner cover 111 and the edge of the inner cover 111 is 50 cm; the height difference between the center of the concave surface of the outer cap 110 and the center of the inner surface of the inner cap 111 is 100 cm. Because the concave surface of the inner sealing cover 111 faces the hollow cover space, the height difference between the center of the concave surface of the outer sealing cover 110 of the hollow cover and the center of the inner surface of the inner sealing cover 111 is easier to realize the distance increase, for the pre-aeration tank with the overlarge field circumference diameter, the hollow cover is easy to realize that the hollow cover has an enough accommodating cavity on the premise of not increasing the outer sealing cover 110, the air pressure in the double-layer sealing cover pre-aeration tank 1 can be buffered, and the phenomenon that the air pressure in the pre-aeration tank is changed too much due to the negative pressure suction after the first induced draft fan 176 is opened, so that the severe change of the dissolved oxygen concentration in the pre-aeration tank is caused to influence the pre-aeration.
Next, the liquid separated by the first cyclone 173 is returned to the double-deck closed-cover pre-aeration tank 1 through the pre-aeration tank body 10 and the pre-aeration tank cover 11 by the first cyclone return pipe 175 connected to the first cyclone 173. The condensate separated by the first cyclone 173 can be used for cleaning and dredging the drain hole 112 by returning to the double-layer closed-cover preaeration tank 1 through the preaeration tank cover 11. The first swirler 173 is installed on the waste gas collecting device 17, so that liquid carried in waste gas can be subjected to gas-liquid separation, the pressure of the first draught fan 176 at the rear end is reduced, the corrosion to components of the draught fan is reduced, the service life of the draught fan is prolonged, the failure rate of the draught fan is reduced, and the material consumption of the next procedure is reduced.
Embodiments 4 to 8
Fig. 5-9 are schematic structural views of 5 embodiments of a pre-aeration tank with a double-layer sealing cover according to the present invention. The difference between these 5 embodiments compared to embodiment 1 is mainly in the shape of the inner cover 111 and the outer cover 110 of the double-covered preaeration tank 1.
As shown in fig. 5, in embodiment 4, the longitudinal cross-sections of the inner cover 111 and the outer cover 110 of the double-covered pre-aeration tank 1 are both oval, and the inner cover 111 and the outer cover 110 are both high at the center and low at the edges, so that the pre-aeration tank cover 11 has the advantages of simple design, easy integral molding and convenient installation.
As shown in fig. 6, in embodiment 5, the outer cover 110 of the double-cover preaeration tank 1 has a triangular longitudinal cross section and an oval inner cover 111, the inner cover 111 has a high center and a low edge, and the preaeration tank cover 11 is designed in a multi-block split structure by using the inner cover 111 and the outer cover 110, i.e., the inner cover 111 and the outer cover 110 are not an integrally formed structure and are separately designed and separately manufactured, and the adjacent joint portions between the inner cover 111 and the outer cover 110, between the inner cover 111 and the inner cover 111, and between the outer cover 110 and the outer cover 110 are connected in a sealing manner, preferably by using sealing gaskets fixedly connected by bolts or buckles. When mounting, the inner cover 111 is mounted first and then the outer cover 110 is mounted. The pre-aeration tank cover 11 has the advantages of simple design and convenient manufacture, and can be designed and processed by separating the outer sealing cover 110 and the inner sealing cover 111, thereby avoiding the opening of a mould for the integral forming of a cover plate, and the outer sealing cover 110 is designed into a triangular shed form, so that the pre-aeration tank body 10 is easy to design and very convenient to install without opening the mould under the condition of cuboid, cube and irregular shape.
As shown in fig. 7, the inner cover 111 of the double-covered preaeration tank 1 in embodiment 6 is designed as a triangular canopy, and the outer cover 110 has an elliptical longitudinal cross-section. The lower end of the inner sealing cover 111 further comprises a support frame which spans the opening of the pre-aeration tank body 10 and is used for supporting the pre-aeration tank cover 11. The design advantage of this kind of pre-aeration tank cover 11 lies in, has avoided apron integrated into one piece to open the mould, and interior closing cap 111 designs into the triangle canopy form and easily produces, installs, and the design support frame is practical especially to the great double-deck closing cap pre-aeration tank 1 of pre-aeration tank body 10 opening span, and the material selection scope of closing cap 111 is wideer in the design support frame, can enlarge soft sealing material, for example transparent film to the closing cap 111 in the formation is laid as the skeleton to the support frame.
In embodiment 7, the outer cover 110 of the double-cover preaeration tank is hemispherical, and the inner cover 111 is elliptical, which is more suitable for preaeration tanks requiring treatment in oversized preaeration tanks.
In the embodiment 8, the longitudinal cross section of the inner sealing cover 111 of the double-layer sealing cover preaeration tank is concave oval, and the longitudinal cross section of the outer sealing cover 110 is arc-shaped. The design of the pre-aeration tank cover 11 is very suitable for the pre-aeration tank requiring the increase of the accommodating space of the hollow cover body, the height of the outer sealing cover 110 is not required to be specially increased, the outer sealing cover 110 can be designed into an arc shape with a small gradient under the condition of large span of the pre-aeration tank cover 11, the waste gas collection is easy, and the tank cover material can be saved.
Embodiment 9
Fig. 10 is a schematic top view of the structure of two adjacent external covers 110 of a double-covered preaeration tank 1 according to embodiment 9 of the present invention. In contrast to embodiment 2, in this embodiment, the pre-aeration tank body 10 is a rectangular parallelepiped, the pre-aeration tank cover 11 is assembled by a plurality of single cover plates consisting of an inner cover 111 and an outer cover 110, a joint 116 between the inner cover 111 and the inner cover 111, and a joint 116 between the outer cover 110 and the outer cover 110 of two adjacent single cover plates are connected by edge overlapping and sealing, two ends of the outer cover 110 and the inner cover 111 are connected by sealing, the sealing material is a sealing gasket and is fixedly connected by bolts or buckles, and the sealing gasket is two-component polyurethane which is an adhesive material.
For longer tanks of the pre-aeration tank 10, it is desirable to design and install a plurality of first waste gas collection pipes 171. For example, in embodiment 9, 4 first off-gas collecting pipes 171 are installed and collected in the second off-gas collecting pipe 172, and if necessary, two or more first cyclones 173 are further connected in series between the second off-gas collecting pipe 172 and the first induced draft fan 176 to improve the gas-liquid separation performance of the first cyclones 173, and the separated liquid is returned to the pre-aeration tank through the pre-aeration tank body 10 by the first cyclone return pipe 175 connected to the first cyclones 173. The cyclone is installed, so that liquid carried in waste gas can be subjected to gas-liquid separation, the pressure of the first draught fan 176 at the rear end is reduced, the corrosion to draught fan components is slowed down, the service life of the draught fan is prolonged, the failure rate of the draught fan is reduced, and the material consumption of the next procedure is reduced. According to the needs, can also install many first draught fans 176 in the series connection, improve waste gas collection and throughput.
Fig. 11 is a plan view showing a single cover plate structure of a pre-aeration tank cover 11 of a double-covered pre-aeration tank 1 according to embodiment 9 of the present invention. In this embodiment, the circular water discharge holes 112 of the rectangular parallelepiped double-covered preaeration tank 1 are symmetrically distributed at the two side edges of the inner cover 111, the air vent 113 is located at the center of the inner cover 111, the air outlet 115 at the top of the outer cover 110 and the air vent 113 at the center of the top of the inner cover 111 below the air outlet 115 are arranged in a staggered manner, and the horizontal distance between the two holes is 50cm, so that the air short flow formed between the two covers can be prevented, and the preaeration waste gas treatment effect can be reduced.
Fig. 12 is a plan view showing a double-deck lid cover structure of a pre-aeration tank according to embodiment 10 of the present invention. Unlike the embodiment 9 in fig. 11, in this embodiment, the rectangular ventilation holes 113 of the rectangular double-covered preaeration tank 1 are symmetrically distributed at the two side edges of the inner cover 111, the circular drainage hole 112 is located at the center of the inner cover 111, the air outlet hole 115 at the top of the outer cover 110 and the drainage hole 112 at the center of the top of the inner cover 111 below the air outlet hole 115 are arranged in a staggered manner, and the horizontal distance between the two holes is 50cm, so that the short flow of air flow formed between the two covers can be prevented, and the pre-aeration waste gas treatment effect can be reduced.
Fig. 13 is a schematic top view of a double-deck lid cover structure of a pre-aeration tank according to embodiment 11 of the present invention. Unlike the embodiment 9 in fig. 11, in this embodiment, the double-covered pre-aeration tank 1 is a cylinder, the inner cover 111 has an arc-shaped longitudinal cross section with a small radian, for example, the radian is set to 3 degrees, the circular water discharge holes 112 are uniformly distributed on the two side edges of the inner cover 111, the rectangular vent hole 113 is located in the center of the inner cover 111, the air outlet hole 115 at the top of the outer cover 110 and the vent hole 113 at the center of the top of the inner cover 111 below the air outlet hole 115 are arranged in a staggered manner, and the horizontal distance between the two holes is 50cm apart, so that the short air flow between the two covers can be prevented and the pre-aeration waste gas treatment effect can be reduced.
Fig. 14 is a schematic top view of a double-deck lid cover structure of a pre-aeration tank according to embodiment 12 of the present invention. Different from the embodiment 9 in fig. 11, in this embodiment, the outer sealing cover 110 and the inner sealing cover 111 of the rectangular double-layer sealing cover pre-aeration tank 1 both have elliptical longitudinal cross-sections, the top of the sealing cover is high, the edge of the sealing cover is low, the two ends of the outer sealing cover 110 and the inner sealing cover 111 are sealed, the circular water discharge holes 112 are uniformly distributed on the two side edges of the inner sealing cover 111, the rectangular vent holes 113 are located on the central strip of the inner sealing cover 111, the air outlet holes 115 at the top of the outer sealing cover 110 and the vent holes 113 at the center of the top of the inner sealing cover 111 below the air outlet holes 115 are arranged in a staggered manner, and the horizontal distance between the two holes is 80cm apart, so that the short air flow formed between the two layers of sealing covers can.
Fig. 15 is a schematic view of a biochemical waste gas treatment system and a process flow according to an embodiment of the present invention, and fig. 16 is a schematic view of a structure of a spray aerobic tank in the embodiment. The biochemical waste gas treatment system and the process flow disclosed by the invention are described below with reference to fig. 15 and 16.
As shown in fig. 15, the utility model discloses a biochemical waste gas treatment system, include: a double-layer cover-sealing preaeration tank 1, a spraying aerobic tank 2 and a waste gas discharge device which are connected in sequence. In this embodiment, the double-covered preaeration tank 1 is the double-covered preaeration tank 1 according to embodiment 2 (i.e., fig. 3) of the present invention, which is formed by modifying a cylinder preaeration tank of an existing wastewater treatment plant, and a double-sealed preaeration tank cover 11 is added. The air outlet end of the first induced draft fan 176 of the double-layer sealing cover preaeration tank 1 is connected with the spraying aerobic tank 2, and the first gas collecting pipe 281 of the waste gas discharge device is communicated with the exhaust hole 212 on the aerobic tank cover 21 of the spraying aerobic tank 2.
Fig. 16 is a schematic view of a spray aerobic tank according to the embodiment of fig. 15. As shown in fig. 16, the spray aerobic tank 2 comprises an aerobic tank body 20, an aerobic tank cover 21, a waste gas aeration device 22, a second wastewater inlet pipe 23, a second aeration device 24, a second wastewater outlet pipe 25 and a sludge spray device 29. The contact part of the edge of the aerobic tank cover 21 and the aerobic tank body 20 is fixedly connected by adopting a buckle 215 or a bolt in a sealing way, the sealing material is a sealing gasket 214 of two-component polyurethane, and the aerobic tank cover 21 is connected with a sludge spraying device 29 for spraying activated sludge into the spraying aerobic tank 2. In this embodiment, the shape of the aerobic tank body 20 is a cylinder, the aerobic tank cover 21 is formed by assembling a plurality of integrally formed structures, the longitudinal cross section of the aerobic tank cover 21 is a semi-ellipse, two adjacent aerobic tank covers 21 are connected by edge overlapping and sealing gasket 214 in a sealing manner and are fixedly connected by a buckle 215 or a bolt, and the sealing gasket 214 is an adhesive material, such as an acrylate structural adhesive. For the smaller spraying aerobic tank 2, the aerobic tank cover 21 can also be designed into an integrally formed structure. The second aeration apparatus 24 includes a second main aeration pipe 241, a second branch aeration pipe 242, and a second aeration head 243, which are connected in series. The aerobic tank cover 21 is made of corrosion-resistant material, such as glass fiber reinforced plastic.
Referring to fig. 16, a plurality of vent holes 212 are formed in the aerobic tank cover 21, and are usually formed in the top of the aerobic tank cover 21, so that the primary degraded waste gas in the spraying aerobic tank 2 can be collected and pass through the vent holes, the cross section of each vent hole 212 can be designed to be oval, circular, arc, rectangular or irregular, preferably circular, and the diameter of each vent hole 212 is 100-200 mm. For the convenience of installation and sealing, the aerobic tank cover 21 is provided with an external convex part 211 with two open ends at the exhaust hole 212 to the outside of the aerobic tank cover 21, the first gas collecting pipe 281 is inserted into the external convex part 211 for fixing, and the sealing connection between the first gas collecting pipe 281 and the aerobic tank cover 21 is realized by filling the sealing material 213 at the connection part between the first gas collecting pipe 281 and the aerobic tank cover.
In the embodiment of the present invention, as shown in fig. 16, the sludge spraying device 29 includes a spraying liquid suction pipe 292, a sludge spraying pump 293, a sludge spraying main pipe 294, a sludge spraying branch pipe 295 and a sludge spraying head 299 which are connected in sequence, wherein an inlet end of the spraying liquid suction pipe 292 is immersed below the liquid level in the spraying aerobic tank 2 and is disposed at a position near the tank wall at the bottom of the spraying aerobic tank 20, for example, near a waste water outlet end at the bottom of the aerobic tank 20; the spray liquid suction pipe 292 is arranged on the wall of the aerobic tank body 20; the sludge spraying branch pipe 295 penetrates through the aerobic tank cover 21 and enters and sprays the aerobic tank 2, and then the sludge spraying branch pipe 298 is communicated with the sludge spraying head 299 below the aerobic tank cover 21 to perform sludge spraying degradation aeration waste gas. In order to ensure that the spraying sludge is fully contacted with the aeration waste gas in the pool and effectively degrade organic volatile components and malodorous gas in the aeration waste gas, the sludge spray header 299 is used for carrying out atomization spraying on the atomization spray header, and the sludge spray branch pipes 298 are distributed below the aerobic pool cover 21 in a multi-way manner along the horizontal direction and are uniformly distributed 1-3 m above the liquid level of the spraying aerobic pool 2. The atomizing spray header is used for spraying the sludge, so that the contact area of the sprayed activated sludge and the waste gas can be enlarged, and the atomized sludge can degrade harmful substances in the waste gas escaping from the liquid level again in the liquid-gas contact process, so that a better waste gas treatment effect is achieved.
Referring to fig. 16, in order to prevent impurities such as garbage, leaves, large-particle impurities and the like from entering the sludge spraying device 29 and blocking the sludge spraying head 299, the inlet end of the spraying liquid suction pipe 292 is also connected with a spraying liquid filtering device 291 which is made of a cylindrical, spherical or rectangular stainless steel cage with filtering holes, and the outside of the cage can be wrapped with at least one layer of stainless steel mesh to improve the filtering effect of the spraying sludge. In addition, in order to facilitate detection, investigation and prevention of blockage of the sludge shower head 299, a branch pipe valve 296, a pressure gauge 297 and a branch pipe filter are sequentially installed on the pipeline of the sludge shower branch pipe 295 exposed above the aerobic tank cover 21, and the pressure gauge 297 and the branch pipe filter are detachably installed on the sludge shower branch pipe 295. The pressure gauge may be replaced by a flow meter. The spraying activated sludge is filtered by the spraying liquid filtering device 291 and the branch pipe filter in two stages before being sprayed, so that the blockage such as garbage, leaves, large-particle impurities and the like entering the sludge spraying branch pipe 295 and the sludge spraying head 299 can be filtered, the atomizing spraying head is protected, and the stable operation performance of the system is improved.
Referring to fig. 16, in order to ensure that the waste gas entering the spray aerobic tank 2 is sufficiently degraded and the odor smell is eliminated as much as possible, a waste gas aeration device 22 is provided to introduce the waste gas entering the spray aerobic tank 2 to aerate the muddy water mixture W3. The waste gas aeration device 22 comprises a waste gas aeration main pipe 221, a waste gas aeration branch pipe 222 and a waste gas aeration head 224 which are sequentially communicated, the waste gas aeration main pipe 221 is arranged on the wall of the aerobic tank body 20 and enters the spraying aerobic tank 2, the waste gas aeration main pipe can also be arranged on the outer surface of the aerobic tank cover 21 and enters the spraying aerobic tank 2 through the aerobic tank cover 21, the waste gas aeration branch pipe 222 and the waste gas aeration head 224 are uniformly distributed in the aerobic tank body 20 and are 0.3-5.0m below the waste water liquid level, and waste gas is aerated into the aerobic tank body 20 through the waste gas aeration head 224. And the installation of gas dispersing devices such as a waste gas aeration head 224 is beneficial to fully dispersing waste gas, so that the waste gas is fully contacted with microbial flora in the spraying aerobic tank 2, and the waste gas treatment effect is improved.
Referring to fig. 15, the exhaust gas discharge device comprises an exhaust gas collection device 28, an alkali spray tower 3, a water spray tank 4, a second induced draft fan 5 and a vent chimney 7 which are connected in sequence. The waste gas collecting device 28 comprises a first gas collecting pipe 281, a second gas collecting pipe 282 and a second cyclone 283 which are connected in sequence, wherein the gas inlet end of the first gas collecting pipe 281 is fixedly and hermetically communicated with the gas exhaust holes 212 on the aerobic tank cover 21, and the gas outlet end of the second cyclone 283 is communicated with a third gas collecting pipe 284; the alkali spray tower 3 comprises a tower body, an alkali spray tower liquid collecting pipe 32 connected with the bottom of the tower body and an alkali spray tower gas collecting pipe 33 connected with the top of the tower, and the third gas collecting pipe 284 is communicated with the side surface of the bottom of the tower body of the alkali spray tower 3; the water spray tank 4 comprises a tank body, a water spray tank liquid collecting pipe 42 connected with the bottom of the tank body and a water spray tank gas collecting pipe 43 connected with the top of the tank body, a waste gas PH online detector is installed on a pipeline of the water spray tank gas collecting pipe 43 away from the water spray tank 4, and the alkali spray tower gas collecting pipe 33 is communicated with the side face of the bottom of the tank body of the water spray tank 4; the air inlet end of the second draught fan 5 is communicated with a gas collecting pipe 43 of the water spray box, and the air outlet end is communicated with an emptying chimney 7 through an induced draft pipe 6.
The process flow of the biochemical waste gas treatment of the embodiment of the utility model is as follows:
as shown in fig. 15, wastewater or wastewater mixture W1 received from a plant area or the outside enters the double-deck closed-cover pre-aeration tank 1 through the first wastewater inlet pipe 15 on the tank wall of the pre-aeration tank body 10, and air K enters the double-deck closed-cover pre-aeration tank 1 through the first main aeration pipe 141 of the first aeration apparatus 14 to aerate the entering wastewater or wastewater mixture W1. The wall of the pre-aeration tank body 10 is also provided with a first sludge return pipe 19, return sludge is provided for the double-layer sealing cover pre-aeration tank 1, the return sludge is activated sludge from a sedimentation tank, activated sludge is added to carry out primary degradation on injected organic wastewater, and the wastewater W2 treated by the double-layer sealing cover pre-aeration tank 1 enters a subsequent process through a first wastewater outlet pipe 16 for treatment. In addition, part of activated sludge is extracted from the first wastewater outlet pipe 16 of the double-layer sealing cover preaeration tank 1 through the sludge return pipe of the double-layer sealing cover preaeration tank 1 and flows back to the double-layer sealing cover preaeration tank 1, and the part of activated sludge flows back to the position near the water inlet of the double-layer sealing cover preaeration tank 1 through the first wastewater inlet pipe 15. The activated sludge in the double-layer sealing cover preaeration tank 1 is used in a backflow mode, so that the activated sludge concentration of the double-layer sealing cover preaeration tank 1 is relatively stable, impact of high-concentration wastewater on the double-layer sealing cover preaeration tank 1 is reduced, and stable operation of aeration is facilitated.
As shown in fig. 15, the first induced draft fan 176 extracts the waste gas containing organic volatile components generated by the aeration and natural volatilization of the waste water or the waste water mixture W1 in the double-covered preaeration tank 1, and the air pressure of the first induced draft fan 176 is 3-60 KPa. The waste gas discharged from the first waste gas collecting pipe 171 communicated with the top of the double-layer cover pre-aeration tank 1 enters the first cyclone 173 through the second waste gas collecting pipe 172, and the separated liquid returns to the double-layer cover pre-aeration tank 1 from the pre-aeration tank body 10 through the first cyclone return pipe 175; the liquid condensed in the pre-aeration tank cover 11 returns to the double-layer cover pre-aeration tank 1 from the edge of the inner cover 111 through a circular drain hole 112 with the diameter of 10-50 mm; the waste gas separated by the first cyclone 173 passes through the third waste gas collecting pipe 174, the first induced draft fan 176 and the waste gas aeration device 22 and then enters the spraying aerobic tank 2 from the aerobic tank cover 21 to be subjected to waste gas aeration and activated sludge spraying, and organic matters in the waste gas are degraded to form primary degraded waste gas.
Referring to fig. 15 and 16, the sludge-water mixture W3 from the plant area sedimentation tank enters the spray aerobic tank 2 through the second wastewater inlet pipe 23 on the wall of the aerobic tank body 20, and the air K enters the spray aerobic tank 2 through the second main aeration pipe 241 of the second aeration device 24 and is aerated by the second aeration head 243 mounted on the second aeration branch pipe 242 on the sludge-water mixture W3. The wastewater W4 after being aerated by the spraying aerobic tank 2 enters the subsequent process for treatment through the second wastewater outlet pipe 25. The second aeration device 24 aerates the spraying aerobic tank 2, the aerobic sludge degrades COD, nitrogen oxides, sulfides and the like in the wastewater in an aerobic environment, and the odor-producing substances in the exposed waste gas are absorbed, decomposed and converted by microorganisms in the process, so that the harmful substances in the waste gas are further degraded, and the waste gas treatment effect is improved. The aerobic tank can continuously provide microbial flora for wastewater and waste gas treatment, ensures the continuity of waste gas treatment, does not need to additionally add new flora and nutrient substances, and has low operation cost.
Referring to fig. 16, the sludge spraying device 29 sprays activated sludge to the waste gas above the liquid level in the spraying aerobic tank 2 and the waste gas generated by the second aeration device 24 in the spraying aerobic tank 2 during aeration to form primary degraded waste gas, the primary degraded waste gas enters the second gas collecting pipe 282 and the second cyclone 283 which are connected in sequence after passing through the first gas collecting pipe 281 of the waste gas collecting device 28 connected to the exhaust hole 212 at the top of the aerobic tank cover 21 of the spraying aerobic tank 2, the waste gas is subjected to gas-liquid separation and then enters the subsequent process for waste gas discharge treatment after passing through the third gas collecting pipe 284, and the liquid separated by the second cyclone 283 returns to the spraying aerobic tank 2 or the double-layer cover pre-aeration tank 1 through the second cyclone return pipe 285 connected to the second cyclone 283. The second cyclones 283 may be provided in one unit or in a plurality of units connected in series or in parallel in order according to need and exhaust gas treatment capability.
Referring to fig. 16, when the spraying aerobic tank 2 is in operation, if abnormality occurs in the pressure gauge 297 or the flow meter installed on a certain sludge spray branch pipe 295 during inspection, for example, the pressure of the pressure gauge is increased or the flow rate of the flow meter is decreased compared with other sludge spray branch pipes 295 around, indicating that the sludge spray header 299 installed on the certain sludge spray branch pipe is blocked, the branch pipe valve 296 can be closed, the sludge spray header 299 and/or the sludge spray branch pipe 298 can be taken out through the connecting part between the sludge spray branch pipe 295 and the aerobic tank cover 21, and the connecting part realizes the sealed and fastened connection between the sludge spray branch pipe 295 and the aerobic tank cover 21 by adopting an end face seal or a threaded connection mode.
Referring to fig. 15, the second induced draft fan 5 is started to adjust the air pressure to 1.0-3.0KPa, the primary degraded waste gas from the third gas collecting pipe 284 enters from the side surface of the bottom of the alkali spray tower 3, the alkali liquor 31 sprayed from the top of the alkali spray tower 3 performs alkali spray on the primary degraded waste gas in a countercurrent manner to form secondary degraded waste gas, the secondary degraded waste gas escapes from the top or upper part of the alkali spray tower 3 and enters the gas collecting pipe 33 of the alkali spray tower, and the alkali-sprayed liquid is discharged from the alkali spray tower liquid collecting pipe 32 at the bottom of the alkali spray tower 3 to perform waste water collection treatment or flows back to the top of the alkali spray tower 3 to continue alkali spray. On the pipeline of the third gas collecting pipe 284 entering the alkali spray tower 3 and on the pipeline of the alkali spray tower gas collecting pipe 33 leaving the alkali spray tower 3, an exhaust gas PH on-line detector is installed, the PH of the exhaust gas is 5.5-6.0 before entering the alkali spray tower 3, and the PH of the exhaust gas is 6.8-7.2 after leaving the alkali spray tower 3. On-site operation proves that acidic substances such as H2S and the like in the primary degraded waste gas and flavor substances which can be absorbed by alkali liquor are removed through alkali spraying, and further purification of the waste gas is realized.
Referring to fig. 15, the water 41 sprayed from the top of the water spray tank 4 washes the secondary degraded exhaust gas from the gas collecting pipe 33 of the alkali spray tower, the PH of the washing gas is adjusted to be neutral, the washing gas escapes from the top or upper part of the water spray tank 4 and enters the gas collecting pipe 43 of the water spray tank, and the washed liquid is discharged from the liquid collecting pipe 42 of the water spray tank 4 at the bottom thereof for wastewater collection treatment. An on-line detector for the pH of the exhaust gas is installed on the pipe of the water spray tank header 43 away from the water spray tank 4 to ensure neutral discharge of the scrubbing gas. The second induced draft fan 5 sucks the washing gas from the water spray box gas collecting pipe 43, and sends the washing gas to the vent chimney 7 through the induced draft pipe 6 for discharging.
Through the utility model discloses behind biochemical method exhaust-gas treatment system and the processing technology, the waste gas foul smell concentration that the pond of preaeration produced can eliminate inorganization completely for 2000-.
Fig. 17 is a schematic view of a biochemical waste gas treatment system and a process flow according to another embodiment of the present invention, and fig. 18 to 20 are schematic views of a spraying aerobic tank, a waste gas aeration device 22, an aeration pipeline, a sludge spraying device and a spraying pipeline according to the embodiment of the present invention shown in fig. 17. Referring to fig. 15 and 16, another biochemical waste gas treatment system and process flow disclosed in the present invention will be described with reference to fig. 17 to 20.
As shown in fig. 17, the present invention discloses another biochemical waste gas treatment system, which comprises: a double-layer cover-sealing preaeration tank 1, a spraying aerobic tank 2 and a waste gas discharge device which are connected in sequence. Unlike embodiment 13, embodiment 14 differs mainly in the following points:
firstly, the double-layer cover pre-aeration tank 1 has different structures. In this embodiment, the double-deck closing cap preaeration pond 1 is the cuboid preaeration pond that utilizes current wastewater treatment plant, increases double-deck sealed preaeration pond lid 11 and reforms transform and forms, and double-deck closing cap preaeration pond 1's structure and the utility model discloses a double-deck closing cap preaeration pond 1 of embodiment 9 (being figure 10) is basically the same, and what is different from embodiment 9 only, double-deck closing cap preaeration pond 1 and the connection that sprays good oxygen pond 2, as shown in figure 17, the first swirler 173 of double-deck closing cap preaeration pond 1, through first whirl back flow pipe 175 through the first back flow pipe 26 of connecting on good oxygen pond lid 21 and/or the first back flow branch pipe 27 of connecting on good oxygen pond body 20 with spray good oxygen pond 2 and link to each other.
Secondly, the structure of the spraying aerobic tank 2 is different. As shown in fig. 18, the aerobic tank body 20 of the spraying aerobic tank 2 is in a cuboid shape, and can also be in a square shape or an irregular shape, and is designed according to actual requirements; the longitudinal cross section of the aerobic tank cover 21 is semicircular, arc-shaped or triangular, when the aerobic tank body 20 is wide and has a large span, the lower part of the aerobic tank cover 21 is also provided with a support frame, and the support frame stretches across the opening of the aerobic tank body 20 and is used for supporting the aerobic tank cover 21; the peep sight glass is arranged on the aerobic tank cover 21 and used for observing the spraying of the sludge in the aerobic tank 2, the peep sight glass can be assembled on the outer surface of the aerobic tank cover 21 above each sludge spraying branch pipe 298 at intervals during design, the working condition of the sludge spray header 299 directly observed through the peep sight glass helps to judge whether the sludge spray header 299 is blocked, the maintenance or the replacement is convenient, the regular disassembly of the sludge spray header 299 for inspection is avoided, and the working efficiency is improved.
As shown in fig. 19, in the present embodiment, the exhaust gas aeration apparatus 22 includes an exhaust gas aeration main pipe 220, an exhaust gas aeration main pipe 221, an exhaust gas aeration branch pipe 222, an exhaust gas aeration branch pipe 223 and an exhaust gas aeration head 224 which are sequentially connected, the exhaust gas aeration branch pipe 222 is disposed on the outer surface of the aerobic tank cover 21, enters the spray aerobic tank 2 through the aerobic tank cover 21, extends toward the bottom of the aerobic tank body 20, the exhaust gas aeration branch pipes 223 are symmetrically distributed in the aerobic tank body 20, are uniformly distributed 0.3 to 5.0m below the liquid level of the wastewater in the aerobic tank body 20, and aerate the exhaust gas into the aerobic tank body 20 through the exhaust gas aeration head 224 mounted on the exhaust gas aeration branch pipe 223. In this embodiment, the waste gas aeration branch pipe 222 may be disposed on the aerobic tank body 20. As shown in fig. 18, the waste gas aeration branch pipe 222 is arranged on the wall of the aerobic tank body 20 and enters the spray aerobic tank 2.
As shown in FIG. 20, in the present embodiment, since the spray aerobic tank 2 has a rectangular parallelepiped shape and a length of 60 to 80 m, in order to fully spray the sludge to the aeration waste gas generated in the spraying aerobic tank 2, the sludge spraying main pipe 294 is arranged and erected above the aerobic tank cover 21, the sludge enters the spraying aerobic tank 2 from the outer surface of the aerobic tank cover 21 in three sections through 3 sludge spraying branch pipes 295 which are arranged at intervals, the sludge spraying branch pipes 295 extend towards the bottom of the spraying aerobic tank 2, the part 1 to 3m above the liquid level of the spraying aerobic tank is connected with sludge spraying branch pipes 298 which are divided into a plurality of paths in parallel and are uniformly distributed below the aerobic tank cover 21, sludge spraying heads 299 are uniformly distributed and installed on the sludge spraying branch pipes 298, the atomized sludge spray header 299 sprays sludge, and the atomized sludge degrades harmful substances in the aerated waste gas escaping from the liquid level again, so that a better waste gas treatment effect is achieved. The sludge spraying device and the spraying pipeline structure which are designed in a multipath way and uniformly arranged can enlarge the liquid-gas contact area between waste gas and activated sludge and improve the effect of spraying treatment and degradation of waste gas.
In addition, in order to ensure the rapid and effective suction of the primary degraded waste gas formed after the sludge is sprayed, the top of the aerobic tank cover 21 is provided with vent holes 212 at intervals, for example, at intervals of 10 to 20 meters, in this embodiment, 3 circular vent holes 212 are provided, 3 first gas collecting pipes 281 are correspondingly arranged in sealed communication with the vent holes, and the second gas collecting pipe 282 collects the waste gas from the 3 first gas collecting pipes 281 and feeds the waste gas into the second cyclone 283.
Thirdly, the liquid after the alkali spraying and the liquid after the water washing have different treatment modes. As shown in fig. 17, the alkali sprayed liquid from the alkali spray tower liquid collecting pipe 32 at the bottom of the alkali spray tower 3 and the washed liquid from the water spray tank liquid collecting pipe 42 at the bottom of the water spray tank 4 are collected in the waste liquid collecting pipe 286, and then enter the second return pipe 287 to return to the spray aerobic tank 2 and/or the double-layer cover pre-aeration tank 1.
Adopt the utility model discloses a biochemical method exhaust-gas treatment system and processing technology can eliminate the high concentration that the pond of preaeration produced and arrange the waste gas foul smell unorganized emission that 2000 increased materials 2400 (dimensionless), realizes finally that the row's of discharging chimney foul smell concentration reduces to 200 increased materials 300 (dimensionless), and the foul smell treatment effect is obvious. The method not only can solve the technical defect that the waste gas is not obvious in treatment effect by simply adopting alkali spraying, but also can solve the problems of large investment, high operation cost and complex operation of one or more combined processes such as traditional incineration, catalytic oxidation, biological method and the like, thereby reducing the enterprise cost and lightening the secondary pollution generated in the use of chemicals.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A double-layer sealing cover preaeration tank comprises a preaeration tank body and a preaeration tank cover, and is characterized in that the preaeration tank cover is a hollow cover body formed by enclosing an inner sealing cover and an outer sealing cover, the preaeration tank cover is fixedly connected with the preaeration tank body in a sealing mode, at least one vent hole is formed in the inner sealing cover and used for communicating the hollow cover body with the preaeration tank body, and at least one vent hole is formed in the outer sealing cover and used for allowing gas of the hollow cover body to pass through;
a first wastewater inlet pipe and a first wastewater outlet pipe are arranged on the wall of the pre-aeration tank body; the pre-aeration tank body is internally provided with a first aeration device which is used for aerating air into the double-layer sealing cover pre-aeration tank;
the joint parts between the inner sealing cover and the outer sealing cover, between the inner sealing cover and the inner sealing cover, and between the outer sealing cover and the outer sealing cover are in sealing connection, and the sealing material is an adhesive material;
the lowest part of the inner sealing cover relative to the bottom of the pre-aeration tank body is provided with 1 or more drain holes communicated with the pre-aeration tank body;
the air outlet hole at the top of the outer sealing cover and the vent hole on the inner sealing cover are arranged in a staggered manner; the air outlet hole at the top of the outer sealing cover and the water discharging hole on the inner sealing cover are arranged in a staggered mode.
2. The double-cover preaeration tank of claim 1, wherein an exhaust gas collection device is fixedly and hermetically connected to an air outlet of the outer cover, and is used for collecting exhaust gas from the cover of the preaeration tank; the waste gas collecting device comprises a first waste gas collecting pipe, a second waste gas collecting pipe and a first induced draft fan which are connected in sequence, wherein the air inlet end of the first waste gas collecting pipe is communicated with the air outlet hole in the pre-aeration tank outer sealing cover in a sealing mode.
3. The double-layer cover-sealing preaeration tank of claim 2, wherein a first cyclone and a third waste gas collecting pipe are sequentially communicated between the second waste gas collecting pipe and the first induced draft fan, the gas outlet end of the first cyclone is communicated with the gas inlet end of the third waste gas collecting pipe, and the liquid separated by the first cyclone returns to the double-layer cover-sealing preaeration tank through a first cyclone return pipe connected to the first cyclone.
4. The double-deck lid preaeration tank of any of claims 1 to 3, wherein the height difference between the center of the concave surface of the inner lid and the edge of the inner lid is 30 to 100 cm; the height difference between the center of the concave surface of the outer seal cover and the center of the inner surface of the inner seal cover is 50-100 cm.
5. The double-deck lid-sealing preaeration tank of claim 4, wherein a first sludge return pipe is further disposed on the wall of the preaeration tank for supplying return sludge to the double-deck lid-sealing preaeration tank.
6. A biochemical waste gas treatment system, which comprises a double-layer cover-sealing preaeration tank, an aerobic tank and a waste gas discharge device which are connected in sequence, wherein the top of a tank cover of the aerobic tank is provided with at least one exhaust hole, and the waste gas discharge device is arranged at the exhaust hole.
7. The system for treating waste gas generated by biochemical process according to claim 6, wherein the aerobic tank is a spraying aerobic tank, and comprises an aerobic tank body, an aerobic tank cover and a sludge spraying device, the aerobic tank cover is fixedly connected with the aerobic tank body in a sealing manner, and the sludge spraying device is connected to the aerobic tank cover and is used for spraying activated sludge into the spraying aerobic tank;
the sludge spraying device comprises a spraying liquid suction pipe, a sludge spraying pump, a sludge spraying main pipe, a sludge spraying branch pipe and a sludge spraying head which are sequentially connected, wherein the inlet end of the spraying liquid suction pipe is immersed below the liquid level in the spraying aerobic tank, and the sludge spraying head is an atomizing spraying head;
the sludge spraying branch pipe is exposed on the pipeline above the aerobic tank cover, and a branch pipe valve, a pressure gauge or a flowmeter and a branch pipe filter are detachably and sequentially arranged on the pipeline.
8. The biochemical waste gas treatment system according to claim 7, wherein the spraying aerobic tank further comprises a waste gas aeration device, the waste gas aeration device inputs the waste gas received from the double-layer cover pre-aeration tank into the spraying aerobic tank through a first induced draft fan, and the waste gas is aerated through a waste gas aeration head distributed 0.3-5.0m below the waste water level in the aerobic tank body by the waste gas aeration device, and the air pressure of the first induced draft fan is 3-60 KPa.
9. The biochemical waste gas treatment system according to claim 8, wherein a second waste water inlet pipe and a second waste water outlet pipe are installed on the wall of the aerobic tank, the second waste water is a sludge-water mixed liquid from the sedimentation tank, and a second aeration device is further provided in the aerobic tank for aerating air into the spray aerobic tank.
10. The biochemical method exhaust gas treatment system according to any one of claims 6 to 9, wherein the exhaust gas discharge device comprises an exhaust gas collection device, an alkali spray tower, a water spray tank, a second induced draft fan and an exhaust chimney which are connected in sequence, and the air pressure of the second induced draft fan is 1.0 to 3.0 KPa;
the alkali spray tower is used for carrying out alkali spray on the waste gas from the waste gas collecting device to form secondary degraded waste gas, the water spray box is used for washing the secondary degraded waste gas to adjust the PH of washing gas to be neutral, and the second induced draft fan is used for sending the washing gas to an emptying chimney for discharge.
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| CN202021037434.6U CN212701282U (en) | 2020-06-08 | 2020-06-08 | Double-layer sealing cover pre-aeration tank and biochemical waste gas treatment system |
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| CN202021037434.6U CN212701282U (en) | 2020-06-08 | 2020-06-08 | Double-layer sealing cover pre-aeration tank and biochemical waste gas treatment system |
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| CN202021037434.6U Active CN212701282U (en) | 2020-06-08 | 2020-06-08 | Double-layer sealing cover pre-aeration tank and biochemical waste gas treatment system |
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Address after: 010000 West District of Tuodian Industrial Park, Tuoketuo County, Hohhot City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Jinhe Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: 010200 West District of Tuodian Industrial Park, Tuoketuo County, Hohhot City, Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA JINHE ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Country or region before: China |