CN116693049A - Sewage treatment device - Google Patents
Sewage treatment device Download PDFInfo
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- CN116693049A CN116693049A CN202310983660.5A CN202310983660A CN116693049A CN 116693049 A CN116693049 A CN 116693049A CN 202310983660 A CN202310983660 A CN 202310983660A CN 116693049 A CN116693049 A CN 116693049A
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- 239000010865 sewage Substances 0.000 title claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 506
- 230000007246 mechanism Effects 0.000 claims abstract description 206
- 239000007788 liquid Substances 0.000 claims abstract description 204
- 238000000926 separation method Methods 0.000 claims abstract description 69
- 239000007921 spray Substances 0.000 claims abstract description 57
- 238000000746 purification Methods 0.000 claims abstract description 51
- 238000006243 chemical reaction Methods 0.000 claims description 45
- 230000009471 action Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 8
- 239000008187 granular material Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 239000000203 mixture Substances 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 4
- 239000000376 reactant Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 48
- 239000010802 sludge Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000007787 solid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000008213 purified water Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
-
- 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
- C02F3/286—Anaerobic digestion processes including two or more steps
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a sewage treatment device, which belongs to the technical field of sewage treatment and comprises a reactor, a water distribution mechanism, a lower water purification mechanism, an upper water purification mechanism, a liquid return mechanism and a gas-liquid separation mechanism, wherein a water distribution pipe is in a spiral shape, a water injection head is arranged on the upper side of the water distribution pipe, the orientation of the water injection head is consistent with the internal water flow direction of the water distribution pipe in the horizontal projection direction, a rotatable liquid return rod is arranged in the liquid return mechanism, the liquid return rod is provided with a spiral blade and a rotary fan blade, the water distribution mechanism is provided with a pair of water distribution pipes which are in central symmetry, sewage is pumped into the corresponding water distribution pipe through an independent water pump, the pumping direction is consistent with the spiral direction of the water distribution pipe, and a water spray nozzle with a smaller pipe diameter is arranged at the tail of the water distribution pipe, and the water outlet direction of the water spray nozzle is horizontally deviated and is perpendicular to the rotary fan blade. The invention fully saves and utilizes the initial kinetic energy of the pumped sewage, can fully mix reactants without adding external equipment, promotes the backflow of mixed liquid, avoids the blockage of a liquid return pipe, and can flexibly control the water inlet flow rate in a double-pump mode.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment device.
Background
In the field of sewage treatment, the anaerobic reactor is mainly applied to treat organic high-concentration wastewater, and organic matters in the wastewater are degraded into usable biogas.
The IC anaerobic reactor is an ultra-efficient anaerobic reactor developed on the basis of the UASB reactor, most organic matters are degraded into biogas in a granular sludge expansion bed of a first reaction zone at the lower part of the IC reactor, the biogas is collected by a first separator, water and sludge are carried by gas lift force to enter a gas ascending pipe, and the biogas is lifted to a gas-liquid separator at the top of the IC reactor for liquid-gas separation, and the water and the sludge flow to the bottom of the reactor through a central circulation return pipe to form internal circulation. The sewage after the first-stage separation flows into a second reaction zone to be treated later, most of the residual degradable organic matters are further degraded, the generated biogas is collected by a second-stage separator, and the effluent flows out of the reactor through an overflow weir.
The internal circulation is based on the principle of gas rise, which is created by the difference in density of the medium of the "riser" and "downcomer" containing gas, where no water pump is needed to achieve this internal circulation. However, the water distribution mechanism in the prior art is arranged at the bottom of the reactor, so that the defect of uneven water distribution exists, and meanwhile, the mixing degree of the granular sludge and the sewage in the reaction zone is limited. Both chinese patent CN208517058U and chinese patent CN216946417U propose to increase the mixing degree of the granular sludge and the organic matters in the sewage, and increase a certain treatment effect by adding an external motor and adding a stirring device inside to make them fully contact, but the reactor structure is more complex and increases the operation cost.
In the actual use process, certain granular sludge exists in the returned liquid, the return pipe is easy to be blocked, and meanwhile, the problem that the liquid can be promoted to return through the pressure regulation and control of an external structure exists in the return process.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the sewage treatment device, which fully utilizes the initial kinetic energy of pumped sewage on the premise of not adding an external stirring mechanism or any mixing device, creatively adopts the double water distribution pipes with spiral structures with water injection heads arranged above, and commonly drives the rotation of the mixed liquid in the first reaction zone by the sewage flow with the same effect ejected from the water injection heads, thereby realizing the technical purpose of automatically stirring the mixed liquid in the reaction zone and improving the water distribution effect of the water distribution mechanism; the water outlet direction of the water inlet pipe is the same as the water inlet direction of the outer ring spiral pipe of the water distribution pipe, so that sewage entering the water distribution pipe moves approximately circularly, the hydrodynamic loss brought by the inside of the water distribution pipe is reduced, and the initial kinetic energy of pumped sewage is reserved to a great extent; the high-kinetic energy sewage is sprayed to the rotary fan blades through the water spray nozzles arranged at the tail parts of the water distribution pipes to drive the liquid return rods to rotate, so that the sludge-water mixed liquid in the gas-liquid separation bin is accelerated to flow back under the action of the rotary spiral blades, the problem of sludge blockage in the liquid return pipes is avoided, and the internal circulation efficiency of the device is improved; through the mutually independent double-pump water inlet structure, the power pressure of a single water pump is effectively relieved, the selectable single-pump or double-pump water inlet mode ensures effective control of water inlet flow velocity, the single water inlet end of the device can be overhauled under the condition of no shutdown, the continuity of sewage treatment is realized, and the water purifying effect of the device is ensured.
The technical scheme adopted by the invention is as follows: the invention provides a sewage treatment device which comprises a reactor, a water distribution mechanism, a lower water purification mechanism, an upper water purification mechanism, a liquid return mechanism and a gas-liquid separation mechanism, wherein the main body of the reactor is a hollow cylinder, the water distribution mechanism, the lower water purification mechanism and the upper water purification mechanism are sequentially arranged in the reactor from bottom to top, the water distribution mechanism is connected with an external sewage pool through the reactor, anaerobic granular sludge is filled in the lower water purification mechanism and the upper water purification mechanism, the lower water purification mechanism and the upper water purification mechanism are continuous and communicated in space, the liquid return mechanism is arranged at the central shaft position of the reactor, the gas-liquid separation mechanism is arranged above the reactor, and the gas-liquid separation mechanism is communicated with the reactor, the lower water purification mechanism, the upper water purification mechanism and the liquid return mechanism.
Preferably, the reactor comprises a reactor body, a water inlet mechanism, a water outlet pipe and a liquid return port, wherein the reactor body is a main body of the reactor and is integrally cylindrical, the water inlet mechanism comprises a first water inlet pipe, a second water inlet pipe, a first water pump and a second water pump, the first water inlet pipe and the second water inlet pipe are arranged in an antisymmetric way and are opposite in water inlet direction, the first water pump is used for connecting the first water inlet pipe with an external sewage tank, the second water pump is used for connecting the second water inlet pipe with the external sewage tank, the first water inlet pipe and the second water inlet pipe form a respective independent double-pump water inlet structure, in the sewage treatment process, the first water pump is used for pumping sewage into the water distribution mechanism through the first water inlet pipe in the external sewage tank, the second water pump is used for pumping the sewage into the water distribution mechanism through the second water inlet pipe, and the water inlet mechanism can be provided with a single-pump or double-pump water inlet modes, namely the sewage independently enters the water distribution mechanism from the first water inlet pipe or the second water inlet pipe into the water distribution mechanism, or simultaneously enters the water distribution mechanism from the first water inlet pipe and the second water inlet pipe, the second water inlet pipe is positioned at the bottom of the reactor, the water inlet mechanism is positioned in the water inlet mechanism and the water inlet mechanism is positioned at the water inlet mechanism, the water inlet mechanism is parallel to the water inlet pipe and the water inlet mechanism is positioned at the water inlet pipe and the water inlet mechanism, and the water inlet mechanism is positioned at the water inlet pipe and the water inlet mechanism is positioned at the water inlet and tangential side of the water inlet pipe and water outlet pipe is positioned at the water outlet and tangential side of the water inlet and water separator.
Preferably, the water distribution mechanism comprises a water distribution pipe, a water injection head, a water spray nozzle and a supporting frame, wherein the water distribution pipe is a spiral water inlet pipe, the head of the water distribution pipe is concentrically arranged with the water inlet mechanism and is fixedly connected with the water inlet mechanism, external sewage enters the reactor through the water distribution pipe, the spiral direction of the water distribution pipe is the same as the water inlet direction of the water inlet mechanism and is from an outer ring to an inner ring, the water flow direction of the inside of the water distribution pipe is from the head to the tail, the head of the water distribution pipe is one side close to the side surface of the water distributor body, the water injection head is uniformly distributed on the upper side of the water distribution pipe, the direction of the water injection head is consistent with the water flow direction of the inside of the water distribution pipe in the horizontal projection direction, a part of sewage is injected into the reactor through the water injection head, a certain vortex and liquid flow are generated, the water spray nozzle is arranged at the tail of the water distribution pipe and is gradually reduced, the pipe diameter of the water spray nozzle is reduced, the water outlet flow rate of the water distribution pipe is increased, and the water outlet direction of the water spray nozzle is positioned horizontally.
Further, the water distribution pipe comprises a first water distribution pipe and a second water distribution pipe, the first water distribution pipe and the second water distribution pipe are concentrically and alternately arranged at the bottom of the reactor, the first water distribution pipe is fixedly connected with a first water inlet pipe, the second water distribution pipe is fixedly connected with a second water inlet pipe, the water spray nozzle comprises a first water spray nozzle and a second water spray nozzle, the first water spray nozzle is fixedly connected with the first water distribution pipe, the second water spray nozzle is fixedly connected with the second water distribution pipe, the water outlet horizontal directions of the first water spray nozzle and the second water spray nozzle are on the same circumference and are consistent in the direction, the support frame and the water distribution pipes are matched and are distributed or equidistantly arranged at the bottom of the reactor, the bottom of the support frame is fixedly connected with the reactor, and the support frame is used for fixing the water distribution pipe at the bottom of the reactor, so that the water distribution pipe maintains a stable state and controls the water flow direction in the water inlet process.
Preferably, the lower water purifying mechanism comprises a first reaction zone, a first three-phase separator and a first gas stripping pipe, wherein the first reaction zone is a space area from the top of the first three-phase separator to the upper part of the water distributing mechanism, high-concentration sewage and granular sludge in the first reaction zone react to generate a large amount of biogas, the first three-phase separator is arranged in the middle of the reactor and at the upper part of the first reaction zone, sewage, gas, granular sludge and the like move upwards of the reactor under the action of water flow and air flotation force, the first three-phase separator can separate most of gas, solid and liquid, the upper part of the first three-phase separator is fixedly connected with the first gas stripping pipe, the separated biogas is gathered at the top of the first three-phase separator and enters the gas-liquid separating mechanism through the first gas stripping pipe, most of granular sludge is blocked in the first reaction zone by the first three-phase separator, and water treated by the lower water purifying mechanism continues to move upwards to enter the upper part of the water purifying mechanism.
Further, the upper water purifying mechanism comprises a second reaction zone, a second three-phase separator and a second gas stripping pipe, the second reaction zone is a space area from the top of the second three-phase separator to the upper part of the first three-phase separator, primary purified sewage continuously reacts in the second reaction zone, the second three-phase separator is arranged at the upper part of the second reaction zone, most of gas, solid and liquid can be separated by the second three-phase separator, the upper part of the second three-phase separator is fixedly connected with the second gas stripping pipe, the second gas stripping pipe is upwards inserted into the gas-liquid separating mechanism through the top of the reactor, biogas generated by the secondary purified sewage is gathered at the top of the second three-phase separator and enters the gas-liquid separating mechanism through the second gas stripping pipe, solid sludge is blocked in the second reaction zone by the second three-phase separator, and the purified water continuously moves upwards and is discharged out of the reactor through a water outlet pipe.
Preferably, the liquid return mechanism comprises a liquid return pipe, a liquid return rod, a fixed base and a top support, wherein the liquid return pipe is positioned in the middle of a top plate of the device body and is concentric with the liquid return opening and is fixedly connected with the top plate of the device body, the upper part of the liquid return pipe is in a horn opening shape and is matched with the size of the liquid return opening, fluid in the gas-liquid separation mechanism can flow to the water distribution mechanism through the liquid return pipe, the liquid return rod is arranged in the liquid return pipe and is concentric with the liquid return pipe, the liquid return rod comprises a rod body, a spiral blade and a rotating fan blade, the spiral blade is arranged on the upper side of the rod body and is positioned in the liquid return pipe, the spiral direction of the spiral blade is downward, the rotating fan blade is arranged at the bottom of the rod body and is arranged on the outer side of the liquid return pipe, the outer diameter of the rotating fan blade is larger than the pipe diameter of the liquid return pipe, the rotating direction of the rotating fan blade is kept consistent with the spiral direction of the spiral blade, the blade plane of the rotating fan blade is inclined by a certain angle and is perpendicular to the water outlet direction of the water distribution nozzle, and the sewage in the water distribution pipe is sprayed on the liquid return rod by the rotating fan blade through the rotating fan blade.
As a further preferable mode of the invention, the rotary fan blade passively rotates under the hydraulic action of the water spray nozzle, the rotary fan blade drives the spiral blade to rotate in the same direction through the rod body, the spiral blade can drive fluid in the gas-liquid separation mechanism to flow to the lower part of the liquid return rod along the liquid return pipe through rotation, the movement direction of the fluid flowing back at the lower part of the liquid return pipe is relatively consistent with the water spray direction of the water spray nozzle, and water vortex is formed in the water distribution mechanism to cause water body to flow so as to avoid sludge accumulation at the bottom.
Further, unable adjustment base is fixed in the central point of the bottom plate of ware body, unable adjustment base's top is connected with the bottom of the body of rod and makes the body of rod keep fixed and can freely rotate in the horizontal circumference direction in vertical direction, top support is arranged in the bottom of gas-liquid separation mechanism and in the top of liquid return mouth, top support bottom and gas-liquid separation mechanism's bottom fixed connection, the intermediate position of the roof of top support is connected with the top of the body of rod and makes the body of rod keep fixed and can freely rotate in the horizontal circumference direction in vertical direction, and sewage sprays from the water spout and promotes rotatory flabellum drive liquid return pole rotation and promotes liquid backward flow to water distribution mechanism in the liquid return pipe.
Preferably, the gas-liquid separation mechanism comprises an air outlet pipe and a gas-liquid separation bin, the air outlet pipe is arranged above the gas-liquid separation mechanism and is communicated with an external gas collecting device, the gas-liquid separation bin is an internal reaction area of the gas-liquid separation mechanism, methane generated in the reactor enters the gas-liquid separation bin through a first gas stripping pipe and a second gas stripping pipe to react to generate pure methane and muddy water mixed liquid, the generated methane is discharged into the external gas collecting device through the air outlet pipe, the gas-liquid separation bin is communicated with the water distribution mechanism through a liquid return pipe, the gas-liquid separation bin is communicated with the lower water purifying mechanism through the first gas stripping pipe, the gas-liquid separation bin is communicated with the upper water purifying mechanism through the second gas stripping pipe, the upper part of the gas-liquid separation bin is a gas collecting area, and the lower part of the gas-liquid separation bin is a backflow muddy liquid area.
The beneficial effects obtained by the invention by adopting the structure are as follows:
(1) Under the premise of not adding any external stirring mechanism or any mixing device, the initial kinetic energy of pumped sewage is fully utilized through the double water distribution pipes with the spiral structures above the water injection heads, high-kinetic energy sewage with the same direction along the preset path is sprayed from the water injection heads, the rotation mixing of the liquid in the first reaction zone is jointly driven, the technical purpose of automatically stirring the liquid is realized, the granular sludge and the organic matters in the sewage can be fully contacted, and the water distribution effect of the water distribution mechanism is improved.
(2) The water spray nozzle arranged at the tail of the water distribution pipe sprays sewage to the rotary fan blade to drive the liquid return rod to automatically rotate, so that the backflow of the muddy water mixed liquid in the gas-liquid separation bin is promoted under the condition of no external power mechanism, the effect of dredging the liquid return pipe is achieved, the internal circulation efficiency is improved, and the pipeline blockage is avoided.
(3) The water outlet direction of the water inlet pipe is the same as the water inlet direction of the outer ring spiral pipe of the water distribution pipe, so that water entering the water distribution pipe moves approximately circularly, the hydrodynamic loss brought by the inside of the water distribution pipe is reduced, and the initial kinetic energy of pumped sewage is reserved to a great extent.
(4) The mutually independent water inlet mechanisms can reasonably select a single-pump or double-pump water inlet mode according to the actual sewage concentration, can effectively control the water inlet flow rate, and ensure the water purifying effect.
(5) In the double-pump water inlet mode, the power pressure of a single water pump can be effectively relieved.
(6) When a single water pump of the reactor needs to be overhauled, the single water inlet end is overhauled by utilizing a single pump water inlet mode on the premise of not stopping the reactor, so that the continuity of sewage treatment is realized.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a sewage treatment apparatus according to the present invention;
FIG. 2 is an overall perspective view of a sewage treatment apparatus according to the present invention;
FIG. 3 is a schematic plan view of a sewage treatment apparatus according to the present invention;
FIG. 4 is a schematic structural view of a water distribution mechanism according to the present invention;
FIG. 5 is a schematic diagram of an explosion structure of the liquid return mechanism according to the present invention;
FIG. 6 is an enlarged view of a portion of the portion I of FIG. 5;
fig. 7 is an enlarged view of a portion at ii in fig. 5.
Wherein 1, the reactor, 11, the device body, 12, the water inlet mechanism, 121, the first water inlet pipe, 122, the second water inlet pipe, 123, the first water pump, 124, the second water pump, 13, the water outlet pipe, 14, the liquid return port, 2, the water distribution mechanism, 21, the water distribution pipe, 211, the first water distribution pipe, 212, the second water distribution pipe, 22, the water jet head, 23, the water jet nozzle, 231, the first water jet nozzle, 232, the second water jet nozzle, 24, the support frame, 3, the lower water purification mechanism, 31, the first reaction zone, 32, the first three-phase separator, 33, the first air stripping pipe, 4, the upper water purification mechanism, 41, the second reaction zone, 42, the second three-phase separator, 43, the second air stripping pipe, 5, the liquid return mechanism, 51, the liquid return pipe, 52, the liquid return rod, 521, the rod body, 522, the spiral blade, 523, the rotating fan blade, 53, the fixed base, 54, the top support, 6, the gas-liquid separation mechanism, 61, the air outlet pipe, 62, and the gas-liquid separation bin.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientation or positional relationships based on those shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As shown in fig. 1-7, the invention provides a sewage treatment device, which comprises a reactor 1, a water distribution mechanism 2, a lower water purification mechanism 3, an upper water purification mechanism 4, a liquid return mechanism 5 and a gas-liquid separation mechanism 6, wherein the main body of the reactor 1 is a hollow cylinder, the water distribution mechanism 2, the lower water purification mechanism 3 and the upper water purification mechanism 4 are sequentially arranged in the reactor 1 from bottom to top, the water distribution mechanism 2 is connected with an external sewage tank through the reactor 1, anaerobic granular sludge is filled in the lower water purification mechanism 3 and the upper water purification mechanism 4, the lower water purification mechanism 3 and the upper water purification mechanism 4 are continuous and communicated in space, the liquid return mechanism 5 is arranged at the central shaft position of the reactor 1, the gas-liquid separation mechanism 6 is arranged above the reactor 1, the gas-liquid separation mechanism 6 is communicated with the inside of the reactor 1, the lower water purification mechanism 3, the upper water purification mechanism 4 and the liquid return mechanism 5, gas generated in the reactor 1 enters the gas-liquid separation mechanism 6 through the lower water purification mechanism 3 and the upper water purification mechanism 4, and the liquid return mechanism 6 is generated in the reactor 1 through the liquid return mechanism 5.
The reactor 1 comprises a reactor body 11, a water inlet mechanism 12, a water outlet pipe 13 and a liquid return port 14, wherein the reactor body 11 is a main body of the reactor 1 and is in a cylinder shape as a whole, the water inlet mechanism 12 comprises a first water inlet pipe 121, a second water inlet pipe 122, a first water pump 123 and a second water pump 124, the first water inlet pipe 121 and the second water inlet pipe 122 are in antisymmetric arrangement and are opposite in water inlet direction, the first water pump 123 is used for connecting the first water inlet pipe 121 with an external sewage tank, the second water pump 124 is used for connecting the second water inlet pipe 122 with the external sewage tank, the first water inlet pipe 121 and the second water inlet pipe 122 form a double-pump water inlet structure which are independent respectively, in the sewage treatment process, the first water pump 123 is used for pumping sewage into the water distribution mechanism 2 through the first water inlet pipe 121 at the external sewage tank, the second water pump 124 pumps sewage into the water distribution mechanism 2 from an external sewage pool through the second water inlet pipe 122, the water inlet mechanism 12 can be provided with a single-pump or double-pump water inlet mode, namely, sewage enters the water distribution mechanism 2 from the first water inlet pipe 121 or enters the water distribution mechanism 2 from the second water inlet pipe 122 alone or enters the water distribution mechanism 2 from the first water inlet pipe 121 and the second water inlet pipe 122 simultaneously, the water inlet mechanism 12 is positioned at the bottom of the reactor 1, the inserting direction is parallel to the horizontal tangential direction of the reactor body 11, the water inlet flow direction of the water inlet mechanism 12 is tangential to the side surface of the reactor body 11, the water outlet pipe 13 is positioned at the top of the reactor 1 and above the upper water purification mechanism 4, the treated sewage is discharged out of the reactor 1 through the water outlet pipe 13, and the center position of the liquid return port 14 at the top of the reactor 1 is communicated with the gas-liquid separation mechanism 6.
The water distribution mechanism 2 comprises a water distribution pipe 21, a water jet head 22, a water spray nozzle 23 and a supporting frame 24, wherein the water distribution pipe 21 is a spiral water inlet pipeline, the head of the water distribution pipe 21 is concentrically arranged with the water inlet mechanism 12 and is fixedly connected, external sewage enters the reactor 1 through the water distribution pipe 21, the spiral direction of the water distribution pipe 21 is the same as the water inlet direction of the water inlet mechanism 12 and is from the outer ring to the inner ring, the water flow direction of the inside of the water distribution pipe 21 is from the head to the tail, the head of the water distribution pipe 21 is one side close to the side surface of the water distributor 11, the water jet head 22 is uniformly distributed on the upper side of the water distribution pipe 21, the direction of the water spray head 22 is consistent with the water flow direction of the inside of the water distribution pipe 21 in the horizontal projection direction, a part of sewage is injected into the reactor 1 through the water spray head 22 in the water distribution pipe 21 to generate certain vortex and liquid flow, the water spray nozzle 23 is arranged at the tail of the water distribution pipe 21 and gradually becomes smaller, the pipe diameter of the water spray nozzle 23 becomes smaller so that the flow speed of the water distribution pipe 21 is increased, the water outlet direction of the water spray nozzle 23 is at the lower position of the water spray nozzle 23, and the water spray nozzle 23 is formed inside the water spray mechanism 2.
The water distribution pipe 21 comprises a first water distribution pipe 211 and a second water distribution pipe 212, the first water distribution pipe 211 and the second water distribution pipe 212 are concentrically and alternately arranged at the bottom of the reactor 1, the first water distribution pipe 211 is fixedly connected with the first water inlet pipe 121, the second water distribution pipe 212 is fixedly connected with the second water inlet pipe 122, the water spray nozzle 23 comprises a first water spray nozzle 231 and a second water spray nozzle 232, the first water spray nozzle 231 is fixedly connected with the first water distribution pipe 211, the second water spray nozzle 232 is fixedly connected with the second water distribution pipe 212, the water outlet horizontal directions of the first water spray nozzle 231 and the second water spray nozzle 232 are on the same circumference and are consistent in direction, the support frame 24 and the water distribution pipe 21 are matched and distributed or equidistantly arranged at the bottom of the reactor 1, the bottom of the support frame 24 is fixedly connected with the reactor 1, the support frame 24 is used for fixing the water distribution pipe 21 at the bottom of the reactor 1, and the water distribution pipe 21 is ensured to maintain a stable state and control the water flow direction in the water inlet process.
The lower water purifying mechanism 3 comprises a first reaction zone 31, a first three-phase separator 32 and a first gas stripping tube 33, wherein the first reaction zone 31 is a space area from the top of the first three-phase separator 32 to the upper part of the water distributing mechanism 2, high-concentration sewage and granular sludge in the first reaction zone 31 react to generate a large amount of biogas, the first three-phase separator 32 is arranged in the middle of the reactor 1 and at the upper part of the first reaction zone 31, sewage, gas, granular sludge and the like move upwards of the reactor 1 under the action of water flow and air floatation force, the first three-phase separator 32 can separate most of gas, solid and liquid, the upper part of the first three-phase separator 32 is fixedly connected with the first gas stripping tube 33, the first gas stripping tube 33 is inserted into the gas-liquid separating mechanism 6 upwards through the top of the reactor 1, the separated biogas is gathered at the top of the first three-phase separator 32 and enters the gas-liquid separating mechanism 6 through the first gas stripping tube 33, most of the granular sludge is blocked in the first three-phase separator 32 and moves upwards of the reactor 1 under the action of water purifying mechanism 3, and the water treated by the lower part of the water purifying mechanism continues to move upwards into the upper part of the water purifying mechanism 4.
The upper water purifying mechanism 4 comprises a second reaction zone 41, a second three-phase separator 42 and a second gas stripping pipe 43, the second reaction zone 41 is a space area from the top of the second three-phase separator 42 to the upper part of the first three-phase separator 32, the once purified sewage continuously reacts in the second reaction zone 41, the second three-phase separator 42 is arranged at the upper part of the second reaction zone 41 and can separate most of gas, solid and liquid, the second gas stripping pipe 43 is fixedly connected to the upper part of the second three-phase separator 42, the second gas stripping pipe 43 is inserted into the gas-liquid separating mechanism 6 upwards through the top of the reactor 1, the biogas generated by the twice purified sewage is gathered at the top of the second three-phase separator 42 and enters the gas-liquid separating mechanism 6 through the second gas stripping pipe 43, the solid sludge is blocked in the second three-phase separator 42, and the purified water continuously moves upwards and is discharged out of the reactor 1 through the water outlet pipe 13.
The liquid return mechanism 5 comprises a liquid return pipe 51, a liquid return rod 52, a fixed base 53 and a top bracket 54, wherein the liquid return pipe 51 is positioned in the middle of the top plate of the device body 11 and is concentric with the liquid return opening 14 and is fixedly connected with the top plate of the device body 11, the upper part of the liquid return pipe 51 is in a horn opening shape and is matched with the size of the liquid return opening 14, fluid in the gas-liquid separation mechanism 6 can flow to the water distribution mechanism 2 through the liquid return pipe 51, the liquid return rod 52 is arranged in the liquid return pipe 51 and is concentric with the liquid return pipe, the liquid return rod 52 comprises a rod body 521, a helical blade 522 and a rotary fan blade 523, the helical blade 522 is arranged on the upper side of the rod body 521 and is positioned in the liquid return pipe 51, the helical direction of the helical blade 522 is downward, the rotary fan 523 is arranged at the bottom of the rod body 521 and is arranged on the outer side of the liquid return pipe 51, the outer diameter of the rotary fan 523 is larger than the pipe diameter of the liquid return pipe 51, the rotation direction of the blades of the rotary fan blades 523 is consistent with the spiral direction of the spiral blades 522, the blade planes of the rotary fan blades 523 incline by a certain angle and are perpendicular to the water outlet direction of the water spray nozzles 23, sewage in the water distribution pipe 21 is sprayed on the blades of the rotary fan blades 523 by the water spray nozzles 23 to enable the liquid return rod 52 to rotate, the rotary fan blades 523 passively rotate under the hydraulic action of the water spray nozzles 23, the rotary fan blades 523 drive the spiral blades 522 to rotate in the same direction through the rod body 521, the spiral blades 522 can drive fluid in the gas-liquid separation mechanism 6 to flow along the liquid return pipe 51 to the lower part of the liquid return rod 52 through rotation, the movement direction of the fluid flowing back at the lower part of the liquid return pipe 51 is consistent with the water spray direction of the water spray nozzles 23 relatively, and water vortex is formed at the bottom of the water distribution mechanism 2 to enable water body to flow, so that sludge at the bottom is avoided.
The fixed base 53 is fixed at the center of the bottom plate of the device body 11, the top of the fixed base 53 is connected with the bottom of the rod 521, so that the rod 521 is kept fixed in the vertical direction and can freely rotate in the horizontal circumferential direction, the top support 54 is arranged at the bottom of the gas-liquid separation mechanism 6 and above the liquid return port 14, the bottom of the top support 54 is fixedly connected with the bottom of the gas-liquid separation mechanism 6, the middle position of the top plate of the top support 54 is connected with the top end of the rod 521, so that the rod 521 is kept fixed in the vertical direction and can freely rotate in the horizontal circumferential direction, sewage is sprayed from the water spray nozzle 23 to push the rotary fan blades 523 to drive the liquid return rod 52 to rotate so as to promote the backflow of the muddy water mixture, and the separated muddy water mixture returns to the bottom of the first reaction zone 31 along the liquid return pipe 51 and is fully mixed with granular sludge and water at the bottom, so that the internal circulation of the mixture in the lower water purification mechanism 3 is realized.
The gas-liquid separation mechanism 6 comprises an air outlet pipe 61 and a gas-liquid separation bin 62, the air outlet pipe 61 is arranged above the gas-liquid separation mechanism 6 and is communicated with an external gas collecting device, the gas-liquid separation bin 62 is an internal reaction area of the gas-liquid separation mechanism 6, the upper part of the gas-liquid separation bin 62 is a gas collecting area, the lower part of the gas-liquid separation bin 62 is a backflow mud-liquid area, the gas-liquid separation bin 62 is communicated with the water distribution mechanism 2 through a liquid return pipe 51, the gas-liquid separation bin 62 is communicated with the lower water purifying mechanism 3 through a first gas stripping pipe 33, the gas-liquid separation bin 62 is communicated with the upper water purifying mechanism 4 through a second gas stripping pipe 43, and methane which is generated in the reactor 1 and carries certain moisture and granular sludge enters the gas-liquid separation bin 62 through the first gas stripping pipe 33 and the second gas stripping pipe 43 to react to generate single gas and mud-water mixture, and the generated methane is discharged into the external gas collecting device through the air outlet pipe 61.
When the device is particularly used, in a double-pump water inlet mode, the inspection device is well connected with external equipment, the first water pump 123 and the second water pump 124 are simultaneously opened to pump external sewage into the first water distribution pipe 211 and the second water distribution pipe 212 respectively through the first water inlet pipe 121 and the second water inlet pipe 122, the sewage keeps higher initial kinetic energy after entering the water distribution pipe 21, flowing sewage is injected into the lower water purification mechanism 3 through the water injection head 22, the sewage forms a vortex in the lower water purification mechanism 3 due to the initial kinetic energy, the sewage fully contacts with granular sludge in the first reaction zone 31 and reacts to generate a large amount of biogas, the mixed liquid such as the sewage, gas and the granular sludge moves above the lower water purification mechanism 3 under the action of water flow and air floatation, the first three-phase separator 32 can separate most of gas, solid and liquid, after the sewage reacts in the first reaction zone 31 passes through the first three-phase separator 32, the separated sewage is gathered at the top of the first three-phase separator 32 and enters the gas-liquid separation mechanism 6 through the first air extraction pipe 33, the separated biogas carries a certain amount of biogas and the granular sludge to fully contact with the granular sludge and react to generate a large amount of biogas, the mixed liquid such as the sewage and the granular sludge returns to the lower water-liquid is returned to the water collection device 5 through the water outlet pipe 14, and the mixed liquid returns to the mixed gas collection device 1 is returned to the outside through the water collection device 1 through the water outlet pipe 4;
the muddy water mixed liquid in the gas-liquid separation bin 62 flows back into the lower water purifying mechanism 3 under the action of self weight, meanwhile, newly-entered sewage is sprayed from the water spray nozzle 23 to push the rotary fan blades 523 to drive the liquid return rod 52 to rotate so as to promote the muddy water mixed liquid to move downwards, and the separated muddy water mixed liquid returns to the bottom of the lower water purifying mechanism 3 along the liquid return pipe 51 and is fully mixed with the granular sludge at the bottom and inflow water, so that the internal circulation of the mixed liquid in the lower water purifying mechanism 3 is continuously reacted;
part of the biogas in the sewage after primary purification enters the gas-liquid separation mechanism 6 through the first gas stripping pipe 33, most of the granular sludge in the residual sewage is blocked in the first reaction zone 31 by the first three-phase separator 32, the sewage treated by the lower water purification mechanism 3 continues to move upwards to enter the upper water purification mechanism 4, the residual organic matters in the sewage are further degraded by the granular sludge in the second reaction zone 41 and continuously generate biogas, the biogas generated by the sewage after secondary purification is gathered on the top of the second three-phase separator 42 and enters the gas-liquid separation mechanism 6 through the second gas stripping pipe 43, the biogas generated in the upper water purification mechanism 4 enters the gas-liquid separation bin 62 and is separated into single gas and muddy water mixed liquid, the mixed liquid in the gas-liquid separation bin 62 is discharged back into the lower water purification mechanism 3 again through the liquid return rod 52 for reaction, the solid sludge in the sewage subjected to secondary purification in the second reaction zone 41 is blocked in the upper water purification mechanism 4 by the second three-phase separator 42 and automatically returns to the second reaction zone 41, and the purified water continues to move upwards and is discharged from the reactor 1 through the water outlet pipe 13 to the lower treatment process step.
In another embodiment, in the single pump mode, only the first water pump 123 is started to pump sewage from an external sewage tank into the reactor 1 through the first water inlet pipe 121 for sewage treatment, the sewage flows from the first water distribution pipe 211 and is sprayed from the corresponding water jet head 22, the sewage is fully mixed in the lower water purifying mechanism 3 and is in contact reaction with the granular sludge, and the treated water is discharged from the water outlet pipe 13 to the next process.
In another embodiment, in the single pump mode, only the second water pump 124 is started to pump sewage from an external sewage tank into the reactor 1 through the second water inlet pipe 122 for sewage treatment, the sewage flows from the second water distribution pipe 212 and is sprayed from the corresponding water jet head 22, the sewage is fully mixed in the lower water purifying mechanism 3 and is in contact reaction with the granular sludge, and the treated water is discharged from the water outlet pipe 13 to the next process.
The single-pump or double-pump mode can effectively adjust the inflow velocity, control the reaction time of sewage and granular sludge, and meet the requirements of sewage treatment in actual work.
The whole working flow of the invention is just the above, and the step is repeated when the invention is used next time. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (10)
1. A sewage treatment device, characterized in that: comprises a reactor (1), a water distribution mechanism (2), a lower water purifying mechanism (3), an upper water purifying mechanism (4), a liquid return mechanism (5) and a gas-liquid separation mechanism (6);
the main part of reactor (1) is hollow cylinder, the inside of reactor (1) has set gradually water distribution mechanism (2), lower part water purification mechanism (3) and upper portion water purification mechanism (4) from bottom to top, water distribution mechanism (2) are connected with outside effluent water sump through reactor (1), the inside of lower part water purification mechanism (3) and upper portion water purification mechanism (4) is all filled with anaerobic granule mud, lower part water purification mechanism (3) and upper portion water purification mechanism (4) are continuous and intercommunication in the space, liquid return mechanism (5) set up the center pin position in reactor (1), gas-liquid separation mechanism (6) set up in reactor (1) top, gas-liquid separation mechanism (6) keep communicating with the inside of reactor (1), lower part water purification mechanism (3), upper portion water purification mechanism (4) and liquid return mechanism (5).
2. A sewage treatment apparatus according to claim 1, wherein: the reactor (1) comprises a reactor body (11), a water inlet mechanism (12), a water outlet pipe (13) and a liquid return port (14), the reactor body (11) is a main body of the reactor (1) and is cylindrical in shape, the water inlet mechanism (12) comprises a first water inlet pipe (121), a second water inlet pipe (122), a first water pump (123) and a second water pump (124), the first water inlet pipe (121) and the second water inlet pipe (122) are arranged in an antisymmetric mode and are opposite in water inlet direction, the first water pump (123) is used for connecting the first water inlet pipe (121) with an external sewage tank, the second water pump (124) is used for connecting the second water inlet pipe (122) with an external sewage tank, the first water inlet pipe (121) and the second water inlet pipe (122) form a mutually independent double-pump water inlet structure, the water inlet mechanism (12) can be provided with a single pump or double-pump water inlet mode, the water inlet mechanism (12) is located at the bottom of the reactor (1) and is parallel to the horizontal direction of the reactor body (11), the first water pump (123) is located at the tangential line position of the water outlet mechanism (6) of the reactor (1), and the water outlet pipe (13) is located at the top of the water return port (6) of the reactor (1).
3. A sewage treatment apparatus according to claim 2, wherein: the water distribution mechanism (2) comprises a water distribution pipe (21), a water jet head (22), a water spray nozzle (23) and a supporting frame (24), wherein the water distribution pipe (21) is a spiral water inlet pipeline, the head of the water distribution pipe (21) is concentrically arranged with the water inlet mechanism (12) and is fixedly connected, the spiral direction of the water distribution pipe (21) is the same as the water inlet direction of the water inlet mechanism (12) and is from an outer ring to an inner ring, the water flow direction of the inside of the water distribution pipe (21) is from the head to the tail, the head of the water distribution pipe (21) is one side close to the side face of the device body (11), the water jet head (22) is uniformly distributed on the upper side of the water distribution pipe (21), the direction of the water jet head (22) is consistent with the water flow direction of the inside of the water distribution pipe (21) in the horizontal projection direction, the water spray nozzle (23) is arranged at the tail of the water distribution pipe (21) and gradually becomes smaller, and the water outlet direction of the water spray nozzle (23) is at a horizontal downward pipe diameter position.
4. A sewage treatment apparatus according to claim 3, wherein: the water distribution pipe (21) comprises a first water distribution pipe (211) and a second water distribution pipe (212), the first water distribution pipe (211) and the second water distribution pipe (212) are concentrically and alternately arranged at the bottom of the reactor (1), the first water distribution pipe (211) is fixedly connected with the first water inlet pipe (121), the second water distribution pipe (212) is fixedly connected with the second water inlet pipe (122), the water spray nozzle (23) comprises a first water spray nozzle (231) and a second water spray nozzle (232), the first water spray nozzle (231) is fixedly connected with the first water distribution pipe (211), the second water spray nozzle (232) is fixedly connected with the second water distribution pipe (212), the water outlet horizontal directions of the first water spray nozzle (231) and the second water spray nozzle (232) are kept consistent in the same circumference and in the direction, the bottom of the reactor (1) is matched with the water distribution pipe (21) in a dispersed or equidistant mode, the bottom of the support frame (24) is fixedly connected with the reactor (1), and the water spray nozzle (232) is fixedly connected with the bottom of the reactor (1).
5. A sewage treatment apparatus according to claim 4, wherein: the lower water purification mechanism (3) comprises a first reaction zone (31), a first three-phase separator (32) and a first gas stripping pipe (33), wherein the first reaction zone (31) is a space region from the top of the first three-phase separator (32) to the upper part of the water distribution mechanism (2), the first three-phase separator (32) is arranged at the middle position of the reactor (1) and at the upper position of the first reaction zone (31), the first gas stripping pipe (33) is fixedly connected to the upper part of the first three-phase separator (32), and the first gas stripping pipe (33) is upwards inserted into the gas-liquid separation mechanism (6) through the top of the reactor (1).
6. A sewage treatment apparatus according to claim 5, wherein: the upper water purification mechanism (4) comprises a second reaction zone (41), a second three-phase separator (42) and a second gas stripping pipe (43), the second reaction zone (41) is a space region from the top of the second three-phase separator (42) to the upper part of the first three-phase separator (32), the second three-phase separator (42) is arranged at the upper part of the second reaction zone (41), the second gas stripping pipe (43) is fixedly connected to the upper part of the second three-phase separator (42), and the second gas stripping pipe (43) is upwards inserted into the gas-liquid separation mechanism (6) through the top of the reactor (1).
7. A sewage treatment apparatus according to claim 6, wherein: the liquid return mechanism (5) comprises a liquid return pipe (51), a liquid return rod (52), a fixed base (53) and a top support (54), wherein the liquid return pipe (51) is located at the middle position of a top plate of a liquid return pipe (11) and is fixedly connected with the top plate of the liquid return pipe (14), the upper part of the liquid return pipe (51) is in a horn opening shape and is matched with the size of the liquid return pipe (14), the liquid return rod (52) is arranged inside the liquid return pipe (51) and is concentrically arranged with the liquid return pipe, the liquid return rod (52) comprises a rod body (521), spiral blades (522) and rotating blades (523), the spiral blades (522) are arranged on the upper side of the rod body (521) and are located inside the liquid return pipe (51), the spiral directions of the spiral blades (522) are downward, the rotating blades (523) are arranged at the bottom of the rod body (521) and are outside the liquid return pipe (51), the outer diameter of the rotating blades (523) is larger than the diameter of the liquid return pipe (51), and the rotation directions of the spiral blades (522) are kept in accordance with the spiral directions of the spiral blades (522) of the water jet nozzles (23).
8. A sewage treatment apparatus according to claim 7, wherein: the rotary fan blades (523) passively rotate under the hydraulic action of the water spray nozzles (23), the rotary fan blades (523) drive the spiral blades (522) to rotate in the same direction through the rod bodies (521), the spiral blades (522) can drive fluid in the gas-liquid separation mechanism (6) to flow to the lower part of the liquid return rod (52) along the liquid return pipe (51) through rotation, and the movement direction of the fluid flowing back at the lower part of the liquid return pipe (51) is relatively consistent with the water spray direction of the water spray nozzles (23).
9. A sewage treatment apparatus according to claim 8, wherein: the fixing base (53) is fixed at the center of the bottom plate of the device body (11), the top of the fixing base (53) is connected with the bottom of the rod body (521) to enable the rod body (521) to be kept fixed in the vertical direction and freely rotate in the horizontal circumferential direction, the top support (54) is arranged at the bottom of the gas-liquid separation mechanism (6) and above the liquid return port (14), the bottom of the top support (54) is fixedly connected with the bottom of the gas-liquid separation mechanism (6), and the middle position of the top plate of the top support (54) is connected with the top end of the rod body (521) to enable the rod body (521) to be kept fixed in the vertical direction and freely rotate in the horizontal circumferential direction.
10. A sewage treatment apparatus according to claim 9, wherein: the gas-liquid separation mechanism (6) comprises an air outlet pipe (61) and a gas-liquid separation bin (62), the air outlet pipe (61) is arranged above the gas-liquid separation mechanism (6) and is communicated with an external gas collecting device, the gas-liquid separation bin (62) is an internal reaction area of the gas-liquid separation mechanism (6), the gas-liquid separation bin (62) is communicated with the water distribution mechanism (2) through a liquid return pipe (51), the gas-liquid separation bin (62) is communicated with the lower water purification mechanism (3) through a first gas stripping pipe (33), the gas-liquid separation bin (62) is communicated with the upper water purification mechanism (4) through a second gas stripping pipe (43), the upper part of the gas-liquid separation bin (62) is a gas collecting area, and the lower part of the gas-liquid separation bin (62) is a backflow mud-liquid area.
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