CN115159678B - Anaerobic reactor for treating wastewater - Google Patents
Anaerobic reactor for treating wastewater Download PDFInfo
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- CN115159678B CN115159678B CN202211087467.5A CN202211087467A CN115159678B CN 115159678 B CN115159678 B CN 115159678B CN 202211087467 A CN202211087467 A CN 202211087467A CN 115159678 B CN115159678 B CN 115159678B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The invention relates to the field of wastewater treatment equipment, and particularly discloses an anaerobic reactor for treating wastewater. The anaerobic reactor comprises: the device comprises a tank body, a water inlet pipe, a three-phase separator, a water outlet groove, a gas holder and a gas stripping flow guider; wherein: the water inlet pipe is arranged at the lower part of the tank body. The three-phase separator is of a cylindrical structure, the lower part of the three-phase separator is externally expanded into a conical cylinder, the three-phase separator is vertically fixed in the upper port of the tank body, a settling area is formed between the three-phase separator and the upper port, and a backflow seam is formed between the lower edge of the three-phase separator and the inner wall of the tank body. The water outlet groove is arranged at the upper part in the settling zone. And the lower port of the gas holder is hermetically fixed on the upper port of the three-phase separator. The gas stripping fluid director is arranged on the lower inclined plane of the three-phase separator. By adopting the novel three-phase separator designed by the invention and combining the gas holder and the tank body, the anaerobic reactor effectively overcomes the defects caused by poor separation effect of the conventional three-phase separator and independent arrangement of the double-membrane gas holder.
Description
Technical Field
The invention relates to the field of wastewater treatment equipment, in particular to an anaerobic reactor for treating wastewater.
Background
The information disclosed in this background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
An anaerobic reactor, such as an upflow anaerobic sludge blanket reactor (UASB), treats wastewater by decomposing organic matter in the wastewater using anaerobic microorganisms that decompose the organic matter. Decomposition products of organic substances include: methane (CH) 4 ) Carbon dioxide (CO) 2 ) Water (H) 2 O) and residual solid matter (sludge).
The organic matter decomposition process generates a large amount of small bubbles (methane, carbon dioxide, etc.) which rise by buoyancy, and the small bubbles are very likely to adhere to the granular or flocculent anaerobic sludge, and rise together with the anaerobic granular sludge or flocculent sludge.
In order to return the anaerobic granular sludge or flocculent sludge to which small bubbles are attached to the reactor again, to achieve a desired effluent quality, and to recover anaerobic microorganisms, a three-phase separator has been developed. Anaerobic granular sludge or flocculent sludge attached with small bubbles can be separated from the small bubbles when contacting the three-phase separator in the rising process, and the anaerobic granular sludge or flocculent sludge has a higher specific gravity than water and falls back to the reactor under the action of gravity, so that the effluent quality reaches the expected purpose, and the anaerobic microorganisms are recovered.
However, not all of the anaerobic granular sludge or flocculent sludge to which small bubbles are attached has an opportunity to touch the three-phase separator, and not all of the anaerobic granular sludge or flocculent sludge touching the three-phase separator can smoothly escape from the small bubbles, which results in: a part of anaerobic granular sludge or flocculent sludge attached with small bubbles forms a floating sludge layer in the three-phase separator, which causes adverse effects on the reactor (such as full three-phase separator, blockage of biogas pipelines and the like); a part of the anaerobic granular sludge or flocculent sludge attached with small bubbles enters the settling zone and flows out along with the effluent, thereby affecting the effluent quality and causing the loss of anaerobic microorganisms. In order to improve the effect of the three-phase separator, the structure of the three-phase separator is designed to be more and more complex, for example, 3 layers or more, which results in the manufacturing cost of the three-phase separator being multiplied, but the obtained effect is very little.
In addition, the biogas generated in the organic matter decomposition process needs to be collected and utilized, and an independent double-membrane gas holder is usually arranged to store the biogas, so that the double-membrane gas holder is high in construction cost and large in occupied area. In addition, the uniformity of the water inlet of the anaerobic reactor and the mixing effect in the anaerobic reactor have great influence on the treatment effect of the anaerobic reactor. In order to improve the uniformity of the inlet water of the anaerobic reactor and the mixing effect inside the anaerobic reactor, people design an inlet water uniform distribution device of the anaerobic reactor and an external circulation device of the anaerobic reactor, but the problems of high construction cost, high energy consumption, easy blockage of the uniform distribution device and the like are also brought, and the water distribution uniformity and the internal mixing effect of the anaerobic reactor are still poor.
Disclosure of Invention
The invention provides an anaerobic reactor for treating wastewater, which effectively overcomes the defects caused by poor separation effect of the conventional three-phase separator and independent arrangement of a double-membrane gas holder by adopting the novel three-phase separator designed by the invention and combining the gas holder with a tank body. In order to achieve the above object, the present invention provides the following technical solutions.
An anaerobic reactor for treating wastewater, comprising: the device comprises a tank body, a water inlet pipe, a three-phase separator, a water outlet groove, a gas holder and a gas stripping flow guider. Wherein: the water inlet pipe is arranged at the lower part of the tank body so as to convey the sewage to be treated into the tank body. The three-phase separator is of a cylindrical structure, the lower part of the three-phase separator is externally expanded into a conical cylinder, the three-phase separator is vertically fixed in the upper port of the tank body, a settling area is formed between the three-phase separator and the upper port, and a backflow seam is arranged between the lower edge of the three-phase separator and the inner wall of the tank body, so that sludge settled in the settling area can penetrate into the tank body. The water outlet groove is arranged at the upper part in the settling zone so as to discharge the treated wastewater. And the lower port of the gas holder is hermetically fixed on the upper port of the three-phase separator so as to collect the methane generated in the tank body. The gas stripping flow director comprises: the separation air guide sleeve, the gas collection baffle, the gas return pipe and the overflowing hole are arranged; the separation air guide sleeve is connected to the outer wall of the lower inclined plane of the three-phase separator, the lower edge of the separation air guide sleeve is in an opening shape, and other edge parts of the separation air guide sleeve are in sealing connection with the lower inclined plane, so that a separation cavity is formed between the separation air guide sleeve and the lower inclined plane. The gas collection baffle is fixed on the inner wall of the inclined plane at the lower part, and the gas collection baffle is positioned below the separation flow guide cover. The air return pipe and the overflowing hole are located on the lower inclined plane and are located on the upper side and the lower side of the gas collecting baffle respectively, the overflowing hole is communicated with the separation cavity, and the air return pipe communicates the upper space of the separation cavity with the space below the lower inclined plane.
Furthermore, the separation air guide sleeve is of a triangular structure and is arranged parallel to the outer wall of the lower inclined plane of the three-phase separator. Two sides of the triangular structure are connected with the lower inclined plane in a sealing way, and an opening is formed between the bottom edge of the triangular structure and the lower inclined plane so as to discharge waste water.
Furthermore, the gas collection baffle is an arc-shaped plate which is vertically fixed on the lower surface of the lower inclined plane, and the concave surface of the arc-shaped plate faces the lower edge of the lower inclined plane, so that a better guiding gas collection effect is provided. The overflowing hole is located on the side of the concave surface, and the air return pipe is located on the other side of the concave surface.
Furthermore, the gas holder is a double-film gas holder, and an interlayer between an inner film and an outer film of the gas holder is inflated to play a role in protecting the safety of the gas holder. Through inciting somebody to action gas holder direct fixed mounting has made full use of the space of jar body top in the top space of jar body, overcomes the big problem of area that sets up the gas holder alone and cause.
Furthermore, a plurality of tension ropes are connected to the upper port of the three-phase separator to divide the upper port of the three-phase separator into a grid shape, so that the gas holder in a methane-free state is supported and prevented from falling into the three-phase separator.
Furthermore, the upper port of the three-phase separator is fixedly connected to the tank body through an upper connecting frame, and the lower port of the three-phase separator is fixedly connected to the inner wall of the tank body through a lower connecting frame.
Furthermore, the upper port of the three-phase separator penetrates through the top surface of the tank body and then extends to the position above the tank body to be connected with the gas holder, and the upper port of the three-phase separator and the gas holder are in sealed connection, so that the leakage of a small amount of biogas entering the position above the settling area is prevented.
Furthermore, the upper port of the three-phase separator is provided with a flanging, and the lower port of the gas holder is fixedly connected to the flanging in a sealing manner.
Furthermore, a water outlet pipe communicated with the water outlet groove is connected to the side wall of the tank body, so that the treated wastewater is discharged out of the tank body.
Further, the device also comprises a rotational flow circulating device which comprises a circulating groove, a horizontal propeller pump and a circulating pipe. Wherein, the circulation groove is fixed on the outer wall of the upper part of the tank body. The horizontal propeller pump is arranged in the water outlet groove, the circulating pipe is positioned in the tank body, the lower end of the circulating pipe is positioned at the lower part of the tank body, the upper end of the circulating pipe is connected with an inlet of the horizontal propeller pump, and a water inlet is formed in the side wall of the tank body in the circulating groove, so that the horizontal propeller pump can send waste water entering the circulating groove through the water inlet back to the tank body through the circulating pipe, and the anaerobic reaction efficiency is improved.
Compared with the prior art, the invention has the following beneficial effects:
(1) The anaerobic reactor provided by the invention has the unique three-phase separator and the gas stripping flow guider, and the problem that the traditional three-phase separator is not easy to separate anaerobic granular sludge or flocculent sludge attached with small bubbles from the bubbles better is effectively solved through the matching of the three-phase separator and the gas stripping flow guider, so that the problem that the anaerobic granular sludge or flocculent sludge attached with the small bubbles enters a settling zone and flows out along with effluent, the effluent quality is influenced, and anaerobic microorganisms are lost is further avoided.
(2) The liquid at the upper part of the tank body is circulated and reflows to the bottom of the tank body through the rotational flow circulating device, so that rotational flow can be formed in the tank body, an anaerobic sludge bed is changed into an anaerobic sludge expanded bed, the effect of diluting the inlet water of the water inlet pipe is achieved, the mixing effect in the tank body is improved, and the treatment effect is good; and a water inlet uniform water distribution device can be omitted, the problem of blockage of the water inlet uniform water distribution device is avoided, and the construction cost of the uniform water distribution device is saved. Namely, the rotational flow circulation device ensures that the liquid flow state in the anaerobic reactor is more reasonable, the reaction area of the rotational flow anaerobic sludge expanded bed is in an expanded state, anaerobic granular sludge is easier to form, and the ecological system of the anaerobic reactor for forming the anaerobic granular sludge is more stable and has higher reaction efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a schematic structural view of an anaerobic reactor for treating wastewater according to an embodiment.
FIG. 2 is a schematic diagram of a three-phase separator according to an embodiment.
Fig. 3 is a schematic longitudinal section of a stripping deflector on a three-phase separator according to an embodiment.
FIG. 4 is a top view of the three-phase separator of the embodiment.
Fig. 5 is a bottom view of the three-phase separator in the embodiment.
Fig. 6 is a schematic structural diagram of an upper port of the three-phase separator in the embodiment.
FIG. 7 is a schematic structural view of an upper end of a can body in an embodiment.
The scores in the above figures represent: 1-tank body, 2-water inlet pipe, 3-three-phase separator, 301-lower inclined plane, 302-pulling rope, 4-water outlet groove, 5-gas holder, 501-inner film, 502-outer film, 6-gas stripping deflector, 601-separating deflector, 602-gas collecting baffle, 603-air return pipe, 604-overflow hole, 605-separating cavity, 7-settling zone, 8-upper connecting frame, 9-lower connecting frame, 10-flanging, 11-water outlet pipe, 12-circulating groove, 13-horizontal propeller pump, 14-circulating pipe and 15-water inlet.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. The words "upper", "lower", "left" and "right" as they appear in the present invention, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element referred to needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the connecting elements may be mechanically connected, directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations. The anaerobic reactor for treating wastewater according to the present invention will now be further described with reference to the drawings and the detailed description.
Referring to fig. 1 to 5, an anaerobic reactor for treating wastewater is illustrated, comprising: the device comprises a tank body 1, a water inlet pipe 2, a three-phase separator 3, a water outlet groove 4, a gas holder 5 and a gas stripping flow guide device 6. Wherein:
referring to fig. 1, the can body 1 is cylindrical, but may have any other suitable shape. The horizontal tangential of inlet tube 2 is fixed on the lower part lateral wall of jar body 1, and the one end of inlet tube 2 is arranged in jar body 1 to make the waste water that gets into in jar body 1 form the whirl, make waste water and anaerobism mud mix more evenly, improve reaction efficiency.
Referring to fig. 2, the three-phase separator 3 is a cylindrical structure so as to be matched with the shape of the inner cavity of the tank body 1, the lower part of the three-phase separator 3 is externally expanded to be a conical cylinder or a trumpet-shaped structure, that is, the lower inclined plane 301 of the three-phase separator 3, so that the air-lifting fluid director 6 is installed on the lower inclined plane 301, and a plurality of sets of air-lifting fluid directors 6 are uniformly distributed along the circumferential direction of the lower inclined plane 301.
The three-phase separator 3 is vertically fixed in the upper end opening of the tank body 1, the upper end opening of the three-phase separator 3 penetrates through the top surface of the tank body 1 and then extends to the position above the tank body 1 to be connected with the gas holder 5, and the three-phase separator and the gas holder are connected in a sealing mode, so that the leakage of a small amount of biogas entering the position above the settling area 7 is prevented. The lower port of the gas holder 5 is hermetically fixed on the upper port of the three-phase separator 3 so as to collect biogas generated by the wastewater in the tank body 1 in the anaerobic treatment process.
A settling zone 7 is formed between the outer wall of the three-phase separator 3 and the inner wall of the tank body 1, solid-liquid separation, namely separation of wastewater and sludge, is further realized for wastewater entering the zone, the sludge is settled downwards after separation, and the wastewater is discharged out of the tank body 1 from the water outlet tank 4 above. Therefore, a backflow seam is arranged between the lower edge of the conical cylinder of the three-phase separator 3 and the inner wall of the tank body 1, so that sludge settled in the settling zone 7 can penetrate into the tank body 1, the sludge is prevented from being discharged out of the tank body 1 along with water, the wastewater treatment quality is prevented from being influenced, and the loss of anaerobic sludge is also caused. The water outlet groove 4 is positioned at the upper part in the settling zone 7, and the water outlet groove 4 is fixed on the inner wall of the tank body 1 so as to discharge the treated wastewater.
The lower inclined plane 301 (namely the side wall of the conical cylinder) of the three-phase separator 3 is provided with a gas stripping deflector 6. With reference to fig. 3, 4, 5, the stripping deflector 6 comprises: a separation air guide sleeve 601, a gas collection baffle 602, a gas return pipe 603 and an overflowing hole 604; wherein:
the separating dome 601 is connected to the outer wall of the lower inclined plane 301, the lower edge of the separating dome 601 (i.e. the edge facing the bottom edge of the lower inclined plane 301) is open, and other edge portions of the separating dome 601 are connected to the lower inclined plane 301 in a sealing manner, so as to form a separating cavity 605 between the separating dome 601 and the lower inclined plane 301, the separating dome 601 may be a plate body structure (such as a square plate, a triangular plate, etc.) with any suitable shape, and the side edge of the separating dome 601 may be connected to the lower inclined plane 301 in a sealing manner through a sealing plate/seal, so as to form the separating cavity 605. For example, when the separation hood 601 is a metal plate, it is welded to the lower inclined plane 301, and an opening is left at the lower edge of the separation hood 601 to facilitate the discharge from the opening into the settling zone 7 after gas-solid separation (i.e., separation of bubbles attached to fine sludge particles) in the separation chamber 605. Referring to fig. 4, in a preferred embodiment, the separation dome 601 is a triangular plate or an isosceles triangular stainless steel plate, which is disposed parallel to the lower inclined plane 301, two waist edges of the isosceles triangular stainless steel plate are welded and sealed with the outer wall of the lower inclined plane 301 through a stainless steel sealing plate, and the bottom edge of the isosceles triangular stainless steel plate is open, thereby forming a semi-enclosed triangular separation chamber 605 with an upper side closed and a lower side open. Such a separation chamber 605 is better able to concentrate the biogas therein at the top for easy discharge from said gas return pipe 603. It should be understood that other shapes of the separation dome 601 may be used to form a correspondingly shaped separation chamber 605 for the gas-solid separation purpose, and the separation dome 601 is considered to be equivalent to the separation dome 601 of the present embodiment.
The gas collecting baffle 602 is fixed on the inner wall of the lower inclined plane 301, and the gas collecting baffle 602 is located below the separation air guide sleeve 601. The air return pipe 603 and the overflowing hole 604 are both located on the lower inclined plane 301, and are located on the upper side and the lower side of the gas collecting baffle 602 respectively. That is, referring to fig. 3, the overflowing hole 604 is opened at the lower/left side of the gas collecting baffle 602, and the gas return pipe 603 is fixed at the upper/right side of the baffle 602, so that the space below the lower inclined plane 301 is communicated with the separation chamber 605 through the overflowing hole 604, so that the wastewater can be introduced into the separation chamber 605. The upper space of the separation chamber 605 is communicated with the space below the lower inclined plane 301 through the air return pipe 603. It should be understood that in a preferred embodiment, the upper end port of the gas return pipe 603 is communicated with the top space of the separation chamber 605, so as to discharge the biogas collected in the upper part of the separation chamber 605 more timely, thoroughly and smoothly.
The special three-phase separator and the gas stripping deflector are matched, so that the defects of the traditional three-phase separator are effectively overcome. When the wastewater treated in the tank body 1 carries part of the sludge attached with the micro bubbles to enter the separation cavity 605 through the flow holes 604, gas-solid separation is realized, the methane is concentrated at the upper part of the separation cavity 605 to form a gas chamber, and the excessive methane returns to the tank body 1 below the lower inclined plane 301 through the gas return pipe 603 and then enters the gas holder 5 to be collected.
As biogas and waste water are continuously lifted from the overflow aperture 604 into the separation chamber 605, biogas is continuously returned from the gas return pipe 603 into the tank 1 below the lower inclined plane 301, while waste water is continuously discharged from the lower opening of the separation chamber 605 into the settling zone 7 for solid-liquid separation.
The biogas from the overflowing hole 604 to the separation cavity 605 has a good stirring effect, so that the waste water in the separation cavity 605 is enabled to realize solid-gas separation, that is, the small bubbles are enabled to be separated from the anaerobic granular sludge or flocculent sludge, and the anaerobic granular sludge or flocculent sludge attached with the small bubbles is prevented from entering the settling zone 7.
Meanwhile, the biogas returned from the gas return pipe 603 to the tank body 1 below the lower inclined plane 301 also plays a good role in stirring, thereby facilitating the realization of solid-gas separation of the wastewater in the tank body 1 below the lower inclined plane 301, promoting the separation of small bubbles from the anaerobic granular sludge or flocculent sludge, reducing the amount of the anaerobic granular sludge or flocculent sludge attached with the small bubbles, and simultaneously preventing the anaerobic granular sludge or flocculent sludge attached with the small bubbles from forming a sludge floating layer inside the three-phase separator 3.
The wastewater is continuously lifted into the separation chamber 605 from the lower part of the lower inclined plane 301 through the through-flow hole 604, and flows out from the opening at the middle lower part of the separation chamber 605 into the settling zone 7, so as to form water distribution for the settling zone 7, the separated small-bubble anaerobic granular sludge or flocculent sludge further realizes solid-liquid separation, the separated clear wastewater flows out from the water outlet tank 4, and the anaerobic granular sludge or flocculent sludge flows back into the tank body 1 from the return slit. The settling zone 7 integrally forms a peripheral water inlet and peripheral water outlet type auxiliary flow settling tank, and the problems of sludge flow direction and sewage flow direction 'countercurrent' of the traditional three-phase separator do not exist in water distribution and sludge backflow, so that the settling effect is better.
Referring to fig. 5, in another embodiment of the anaerobic reactor for treating wastewater, the gas collecting baffle 602 is an arc-shaped plate vertically fixed on the lower surface of the lower inclined surface 301, and the concave surface of the arc-shaped plate faces the lower edge of the lower inclined surface 301, so as to provide better gas collecting effect. The overflowing hole 604 is located on the side of the concave surface, and the muffler 603 is located on the other side of the concave surface. It should be understood that the gas collecting baffle 602 is not limited to the arc-shaped plate, but may be a straight plate, a corrugated plate, or the like.
Referring to fig. 1, in another embodiment of the anaerobic reactor for treating wastewater, the gas holder 5 is a double-membrane gas holder, and the interlayer between the flexible inner membrane 501 and the flexible outer membrane 502 is filled with air to protect the gas holder 5. Through inciting somebody to action gas holder 5 direct fixed mounting effectively overcomes the big problem of area that sets up the gas holder alone and cause in the space of the top of jar body 1. Since on the one hand the space above the can body 1 is fully utilized. On the other hand, when no biogas or less biogas is available, the gas holder 5 is in a collapsed state, and the volume of the gas holder is substantially smaller than that of the conventional rigid gas holder 5.
Referring to fig. 6, in another embodiment, when the gas holder 5 is a double-membrane gas holder formed by the above-mentioned flexible inner membrane 501 and flexible outer membrane 502, the upper port of the three-phase separator 3 is connected with a plurality of pulling ropes 302 which are vertically and horizontally tensioned, so as to divide the upper port of the three-phase separator 3 into a grid shape, so as to support the gas holder 5 in a collapsed state when there is no biogas or less biogas, and prevent the gas holder from falling into the three-phase separator 3.
Referring to fig. 1 and 7, in another embodiment, in the above anaerobic reactor for treating wastewater, the upper port of the three-phase separator 3 is fixedly connected to the tank 1 by an upper connecting frame 8, and the lower port of the three-phase separator 3 is fixedly connected to the inner wall of the tank 1 by a lower connecting frame 9. Go up link 8 and link 9 and be the steelframe or steel pole down, through go up link 8 and link 9 fix three-phase separator 3 on jar body 1 more firmly, do not influence simultaneously and subside the mud of whereabouts in the district 7 and get into jar body 1 and retrieve after discharging from the backstitch between the lower limb of three-phase separator 3 and the jar body 1 inner wall down.
Referring to fig. 1 and 2, in another embodiment, in the anaerobic reactor for treating wastewater, the upper port of the three-phase separator 3 is provided with a flange 10, and the lower port of the gas holder 5 is fixedly connected to the flange 10 in a sealing manner.
Referring to fig. 1, in another embodiment, in the anaerobic reactor for treating wastewater, an outlet pipe 11 connected to the side wall of the tank 1 is connected to the outlet trough 4, so that the treated wastewater is discharged out of the tank 1.
Referring to fig. 1, in another embodiment, the anaerobic reactor for treating wastewater as described above further includes a cyclone circulation device including: a circulation tank 12, a horizontal propeller pump 13, and a circulation pipe 14. Wherein, the circulation groove 12 is fixed on the outer wall of the upper part of the tank body 1. The horizontal propeller pump 13 is arranged in the water outlet tank 4, the circulating pipe 14 is positioned in the tank body 1, the lower end of the circulating pipe 14 is positioned at the lower part of the tank body 1, the upper end of the circulating pipe 14 is connected with an inlet of the horizontal propeller pump 13, and a water inlet 15 is formed in the side wall of the tank body 1 in the circulating tank 12, so that the horizontal propeller pump 13 can send the wastewater entering the circulating tank 12 through the water inlet 15 back to the tank body 1 through the circulating pipe 14, and the anaerobic reaction efficiency is improved. The horizontal propeller pump 13 has the characteristics of low lift, large flow and low energy consumption, and the rotational flow circulating device can circulate and return liquid at the upper part of the tank body 1 to the bottom of the tank body, so that rotational flow can be formed in the tank body 1, an anaerobic sludge bed is changed into an anaerobic sludge expanded bed, the effect of diluting the inlet water of the water inlet pipe 2 is realized, and the mixing effect and the treatment effect in the tank body are improved; and a water inlet uniform water distribution device can be omitted, the problem of blockage of the water inlet uniform water distribution device is avoided, and the construction cost of the uniform water distribution device is saved.
Finally, it should be understood that 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. Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (12)
1. An anaerobic reactor for treating wastewater, comprising: the device comprises a tank body, a water inlet pipe, a three-phase separator, a water outlet groove, a gas holder and a gas stripping flow guider; wherein: the water inlet pipe is arranged at the lower part of the tank body; the three-phase separator is of a cylindrical structure, the lower part of the three-phase separator is externally expanded into a conical cylinder, the three-phase separator is vertically fixed in the upper port of the tank body, a settling zone is formed between the three-phase separator and the upper port, and a backflow seam is formed between the lower edge of the three-phase separator and the inner wall of the tank body; the water outlet groove is arranged at the upper part in the settling zone; the lower port of the gas holder is hermetically fixed on the upper port of the three-phase separator; the gas stripping flow director comprises: the separation air guide sleeve, the gas collection baffle, the gas return pipe and the overflowing hole; the separation air guide sleeve is connected to the outer wall of a lower inclined plane of the three-phase separator, the lower edge of the separation air guide sleeve is in an opening shape, and other edge parts are in sealing connection with the lower inclined plane, so that a separation cavity is formed between the separation air guide sleeve and the outer wall of the inclined plane; the gas collecting baffle is fixed on the inner wall of the inclined plane at the lower part and is positioned below the separation flow guide cover; the air return pipe and the overflowing hole are located on the lower inclined plane and located on the upper side and the lower side of the gas collecting baffle respectively, the overflowing hole is communicated with the separation cavity, and the air return pipe communicates the upper space of the separation cavity with the space below the lower inclined plane.
2. An anaerobic reactor for treating wastewater according to claim 1, characterized in that the separation baffle is of triangular configuration arranged parallel to the outer wall of the lower inclined plane of the three-phase separator; two sides of the triangular structure are connected with the lower inclined plane in a sealing way, and an opening is formed between the bottom edge of the triangular structure and the lower inclined plane.
3. An anaerobic reactor for treating wastewater according to claim 1, characterized in that the gas collecting baffle is an arc-shaped plate which is vertically fixed on the lower surface of the lower inclined plane, and the concave surface of the arc-shaped plate faces the lower edge of the lower inclined plane; the overflowing hole is positioned on the side of the concave surface, and the air return pipe is positioned on the other side of the concave surface.
4. An anaerobic reactor for treating wastewater according to claim 1, characterized in that the gas holder is a double membrane gas holder.
5. An anaerobic reactor for treating wastewater according to claim 4, characterised in that the interlayer between the inner and outer membranes of the dual membrane gas holder is aerated.
6. An anaerobic reactor for treating wastewater according to claim 4, characterized in that a plurality of strands of tension ropes are connected to the upper port of the three-phase separator to divide the upper port of the three-phase separator into a grid shape.
7. An anaerobic reactor for treating wastewater according to claim 6, characterized in that the pulling rope is a wire rope.
8. An anaerobic reactor for treating wastewater according to claim 1, wherein the upper port of the three-phase separator is fixedly connected to the tank body by an upper connecting frame, and the lower port of the three-phase separator is fixedly connected to the inner wall of the tank body by a lower connecting frame.
9. An anaerobic reactor for treating wastewater according to claim 1, wherein the upper port of the three-phase separator extends through the top surface of the tank to above the tank and is connected with the gas holder in a sealing manner.
10. An anaerobic reactor for treating wastewater according to claim 1, characterized in that the upper port of the three-phase separator is provided with a flange, and the lower port of the gas holder is fixedly connected with the flange in a sealing way.
11. An anaerobic reactor for treating waste water according to claim 1, wherein an outlet pipe is connected to the side wall of the tank body and communicates with the outlet trough.
12. An anaerobic reactor for treating wastewater according to claim 1, further comprising a cyclone circulation device comprising a circulation tank, a horizontal propeller pump and a circulation pipe; wherein, the circulating groove is fixed on the outer wall of the upper part of the tank body; the horizontal propeller pump is arranged in the water outlet groove, the circulating pipe is positioned in the tank body, the lower end of the circulating pipe is positioned at the lower part of the tank body, the upper end of the circulating pipe is connected with an inlet of the horizontal propeller pump, and a water inlet is formed in the side wall of the tank body in the circulating groove.
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| CN107601660A (en) * | 2016-06-13 | 2018-01-19 | 沃克福德环境工程与技术服务有限责任公司 | Anaerobic reactor |
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