CN114772850A - Self-generated dynamic membrane solid-liquid separator and use method thereof - Google Patents
Self-generated dynamic membrane solid-liquid separator and use method thereof Download PDFInfo
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- 239000012528 membrane Substances 0.000 title claims abstract description 134
- 239000007788 liquid Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005273 aeration Methods 0.000 claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000010008 shearing Methods 0.000 claims abstract description 54
- 239000010865 sewage Substances 0.000 claims abstract description 44
- 238000001556 precipitation Methods 0.000 claims abstract description 42
- 238000004062 sedimentation Methods 0.000 claims abstract description 37
- 230000008929 regeneration Effects 0.000 claims abstract description 30
- 238000011069 regeneration method Methods 0.000 claims abstract description 30
- 238000011282 treatment Methods 0.000 claims abstract description 23
- 230000001172 regenerating effect Effects 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000010802 sludge Substances 0.000 claims description 31
- 244000005700 microbiome Species 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 238000011001 backwashing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- 230000028327 secretion Effects 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 239000012466 permeate Substances 0.000 abstract description 2
- 210000004379 membrane Anatomy 0.000 description 85
- 210000002469 basement membrane Anatomy 0.000 description 4
- 238000011221 initial treatment Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/20—Activated sludge processes using diffusers
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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Abstract
The application relates to a self-generating dynamic membrane solid-liquid separator, which belongs to the field of sewage treatment equipment and comprises a dynamic membrane pool, a precipitation unit immersed in the dynamic membrane pool, a cross-flow shearing aeration device used for stirring sewage in the dynamic membrane pool and an air supply device used for providing an air source for the cross-flow shearing aeration device; a distance is reserved between the bottom end of the sedimentation unit and the bottom of the dynamic membrane pool; the dynamic membrane pool is internally provided with a dynamic base membrane which can enable water to permeate, and the periphery and the bottom of the precipitation unit are wrapped inside by the dynamic base membrane; the inside of the dynamic membrane pool is also provided with a regenerative aeration component, the regenerative aeration component is positioned below the outer side of the dynamic base membrane, and the regenerative aeration component is connected with the air supply device; the regeneration aeration component is provided with a control valve. The application also relates to a use method of the autogenous dynamic membrane solid-liquid separator, which has the effects of improving the water treatment effect and ensuring the SS index of the water quality of the effluent of the sedimentation device.
Description
Technical Field
The application relates to the field of sewage treatment equipment, in particular to an authigenic dynamic membrane solid-liquid separator and a using method thereof.
Background
At present, sewage treatment generally comprises the following processes:
the primary treatment of sewage is also called as physical sewage treatment. Through simple precipitation, filtration or proper aeration, suspended matters in the sewage are removed, the pH value is adjusted, and the rotting degree of the sewage is reduced. The treatment can be composed of screening, gravity precipitation, flotation and other methods which are connected in series, and most of particulate matters with the particle size of more than 100 micrometers in the sewage are removed. Larger substances can be removed by screening; the inorganic particles and the organic particles with the relative density of more than 1 and the cohesiveness can be removed by gravity precipitation; flotation removes particulate matter (oils, etc.) having a relative density of less than 1. The wastewater after primary treatment generally still can not reach the discharge standard.
The secondary sewage treatment is a technological process of further purifying sewage after the primary sewage treatment and then the treatment in an aeration tank and a sedimentation tank with activated sludge. Commonly used methods include biological and flocculation methods. The biological method is to utilize microorganisms to treat sewage and mainly remove organic matters in the sewage after primary treatment; the flocculation method is to add flocculant to destroy the stability of colloid, so that colloid particles flocculate to produce flocculate and adsorption, and mainly removes inorganic suspended matters and colloid particles or low-concentration organic matters in the sewage after primary treatment. The sewage after the secondary treatment can generally meet the requirements of agricultural irrigation and the discharge standard of waste water. But may still cause pollution of natural water under certain conditions.
The three-stage sewage treatment refers to the last stage of three stages of urban sewage treatment, and is a high-grade sewage treatment (also called advanced treatment) measure. After the secondary treatment, the sewage still contains phosphorus, nitrogen, organic matters, mineral matters, pathogens and the like which are difficult to biodegrade, and further purification treatment is needed to eliminate pollution.
The two-stage process sewage treatment integrated equipment taking a biological process as a main body in the market easily causes the SS index in the effluent to exceed the standard due to the defects of lack of three-stage treatment, insufficient medicament or limitation of the total volume of the integrated equipment, overhigh surface load of a sedimentation tank, insufficient retention time and the like.
Disclosure of Invention
In order to realize the promotion of water treatment effect, the quality SS index of the effluent of the precipitation device is guaranteed, the application provides an autogenous dynamic membrane solid-liquid separator and a using method thereof.
The application provides a from living dynamic membrane solid-liquid separator adopts following technical scheme:
a self-generated dynamic membrane solid-liquid separator comprises a dynamic membrane pool, a precipitation unit immersed in the dynamic membrane pool, a cross flow shearing aeration device used for stirring sewage in the dynamic membrane pool and an air supply device used for providing an air source for the cross flow shearing aeration device;
a distance is reserved between the bottom end of the sedimentation unit and the bottom of the dynamic membrane pool;
the dynamic membrane pool is internally provided with a dynamic base membrane which can enable water to penetrate through, the periphery and the bottom of the precipitation unit are wrapped by the dynamic base membrane, and the water in the dynamic membrane pool firstly penetrates through the dynamic base membrane and then enters the precipitation unit for precipitation treatment;
the interior of the dynamic membrane pool is also provided with a regenerative aeration component, the regenerative aeration component is positioned below the outer side of the dynamic base membrane, and the regenerative aeration component is connected with the air supply device so that the air supply device can provide an air source for the regenerative aeration component;
the regenerative aeration component is provided with a control valve, and the control valve is used for controlling the disconnection or the connection between the regenerative aeration component and the air supply device.
By adopting the technical scheme, when the device works normally, the control valve on the regeneration aeration pipeline is closed, the air supply device supplies air to the inside of the cross flow shearing aeration device, so that water flow circulating up and down is formed inside the dynamic membrane pool, oxygen content in water in the pool is increased due to the air supplied by the cross flow shearing aeration device, so that microorganisms grow actively, sewage in the dynamic membrane pool is fully reacted with the microorganisms in the dynamic membrane pool, the microorganisms and secretions thereof are gathered on the surface of the dynamic base membrane to form a floccule layer, and a muddy water mixture is intercepted, so that most SS is intercepted outside the precipitation unit, and the sewage entering the precipitation unit is clarified; when carrying out the backwash to dynamic base film, open the last control flap of regeneration aeration pipeline, make air feeder for regeneration aeration pipeline in supply the air to carry out the gas to the surface of dynamic base film and scrub, the in-process system of backwash need not shut down, and sustainable water of producing. After the backwashing is finished, the control valve on the regeneration aeration pipeline is closed, a layer of floccule layer is formed on the surface of the dynamic base membrane again, and the obtained water entering the precipitation unit is filtered.
Optionally, the sedimentation unit comprises a sedimentation casing, and the sedimentation casing comprises a casing with an open top and a closed bottom;
the inside of the shell is provided with an installation cavity positioned above and a sludge area with the cross section area gradually reduced from top to bottom below the installation cavity;
an inner shell is arranged in the mounting cavity, and a water inlet channel is formed between the inner shell and the side wall of the mounting cavity;
the bottom end of the inner shell is connected with the inclined side wall of the sludge area, the side wall of the bottom end of the inner shell is provided with a water inlet hole, and the inner shell is provided with a water producing point which is communicated with the inside of the inner shell so as to discharge water;
a precipitation filler is arranged in the inner shell, and the water production point is positioned above the precipitation filler;
the bottom of shell is provided with and returns mud subassembly to the air stripping in the dynamic membrane pond with the mud that accumulates in the mud district, the mud subassembly is returned to the air stripping with air supply device is linked together.
Through adopting above-mentioned technical scheme, return the mud subassembly through the bottom that sets up the air stripping at the shell, the air stripping returns the inside that the mud subassembly returned the dynamic membrane pond with the mud that stores up in the mud district to increase the mud content in the dynamic membrane pond, thereby need not additionally set up the step of filling in mud in the dynamic membrane pond.
Optionally, the air lift returns mud subassembly includes vertical setting and the mud pipe that advances that is linked together with mud district, advance the mud pipe and be located the bottom outside of shell, the bottom of advancing the mud pipe is provided with the mud pipe that is linked together with advancing the mud pipe, it is located between the both ends of mud pipe to advance the intercommunication position between mud pipe and the mud pipe, wherein one end of mud pipe does the play mud end of mud pipe, the other end of mud pipe is linked together with air feed device through air lift return mud pipeline, install control valve on the air lift return mud pipeline.
Through adopting above-mentioned technical scheme, be located the mud sedimentation of mud district and enter into the inside of advancing the mud pipe, enter into and get into in the mud pipe and then get into the mud pipe along advancing the mud pipe and get into the mud pipe, when letting in the air in the mud pipe mutually, the air promotes mud and removes to the play mud end direction of mud pipe to spout and fall back to the inside in dynamic membrane pond from the export of the play mud end of mud pipe.
Optionally, the mud outlet end of the exhaust pipe is bent upwards.
Through adopting above-mentioned technical scheme, can make mud amasss in the inside of mud pipe and mud pipe.
Optionally, the inside in mud district still is provided with separator and blast pipe, blast pipe one end with the separator links to each other, the other end of blast pipe stretches out to the outside of shell, the separator adopts the three-phase separator, the blast pipe is used for the gaseous exhaust of separator separation.
Through adopting above-mentioned technical scheme, not only can collect the gas that probably scatters excessive in the mud district through separator and blast pipe, guide gas and pass through the blast pipe and discharge to external environment, avoid the gas in the mud district to adhere to on the mud floc, reduce mud density, cause the mud come-up, influence play water quality of water.
Optionally, the exhaust pipe is a hose, a floating object is installed at one end of the exhaust pipe extending out of the outer shell, and the exhaust end of the exhaust pipe is always located on the liquid level through the floating object.
Through adopting above-mentioned technical scheme, make the exhaust end of blast pipe float on the liquid level always, guarantee the normal exhaust function of blast pipe, thereby reduce the condition that water entered into and caused the shutoff of blast pipe in the blast pipe.
Optionally, the dynamic base film includes an inner film layer and an outer film layer that can allow water to permeate, and a water storage cavity is arranged between the inner film layer and the outer film layer.
Through adopting above-mentioned technical scheme, sewage can see through the inboard rete and the outside rete of developments base film to get the flocculus among the messenger sewage and intercept on inboard rete and outside rete.
Optionally, the cross-flow shearing aeration device includes a cross-flow shearing aeration pipe set located at the bottom of the dynamic membrane pool, the cross-flow shearing aeration pipe set is communicated with the air supply device through a cross-flow shearing pipeline, a vertically arranged partition plate is arranged inside the dynamic membrane pool, a distance is left between the partition plate and the bottom of the dynamic membrane pool, and the partition plate and the cross-flow shearing pipe set are transversely arranged in a staggered manner.
By adopting the technical scheme, after the cross-flow shearing aeration device is filled with air, the dynamic base film can form a water flow circulating up and down inside, so that the flow of water is promoted, and sewage can better fully react with microorganisms.
Optionally, the number of the cross-flow shearing aeration tube groups is two, the two cross-flow shearing aeration tube groups are respectively located on two opposite sides of the sedimentation unit, and the number of the partition plates is the same as that of the cross-flow shearing aeration tube groups and corresponds to that of the cross-flow shearing aeration tube groups one by one.
Through adopting above-mentioned technical scheme, make rivers circulation more abundant in the dynamic membrane pond to accelerate the reaction rate between sewage and the microorganism.
The application provides a use method of an autogenous dynamic membrane solid-liquid separator, which adopts the following technical scheme:
a use method of an authigenic dynamic membrane solid-liquid separator comprises the following specific use methods: when the device works normally, a control valve on the regeneration aeration component is closed, the air supply device supplies air into the cross-flow shearing aeration device, the cross-flow shearing aeration device enables up-and-down circulating water flow to be formed in the dynamic membrane pool, meanwhile, the oxygen content in water is increased in the dynamic membrane pool, the growth of microorganisms is promoted, the microorganisms and secretion thereof are gathered to form a flocculent layer on the surface of the dynamic base membrane, the flocculent layer has the function of intercepting sewage, and SS is intercepted outside the precipitation unit;
when the dynamic base membrane needs to be backwashed, a control valve on the regeneration aeration pipeline is opened, and the air supply device supplies air to the regeneration aeration component, so that the dynamic base membrane is scrubbed; and after backwashing is finished, the regeneration aeration pipeline is closed, and a flocculent layer is formed on the surface of the dynamic base membrane again to intercept the sewage.
By adopting the technical scheme, when the device works normally, the control valve on the regeneration aeration pipeline is closed, the air supply device supplies air to the inside of the cross flow shearing aeration device, so that water flow circulating up and down is formed inside the dynamic membrane pool, oxygen content in water in the pool is increased due to the air supplied by the cross flow shearing aeration device, so that microorganisms grow actively, sewage in the dynamic membrane pool is fully reacted with the microorganisms in the dynamic membrane pool, the microorganisms and secretions thereof are gathered on the surface of the dynamic base membrane to form a floccule layer, and a muddy water mixture is intercepted, so that most SS is intercepted outside the precipitation unit, and the sewage entering the precipitation unit is clarified; when carrying out the backwash to dynamic base film, open the last control flap of regeneration aeration pipeline, make air feeder for the air that supplies in the regeneration aeration pipeline to carry out gas to the surface of dynamic base film and scrub, the in-process system need not shut down at the backwash, and sustainable product water. After backwashing is finished, a control valve on the regeneration aeration pipeline is closed, a layer of flocculent layer is formed on the surface of the dynamic base membrane again, and water entering the precipitation unit is filtered.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the sewage treatment device works normally, the regeneration aeration pipeline enables the interior of the dynamic membrane tank to form a water flow circulating up and down, the oxygen content in the water is increased due to the fact that air supplied by the cross flow shearing aeration device is sheared by the water in the tank, so that microorganisms grow actively, the sewage in the dynamic membrane tank fully reacts with the microorganisms in the dynamic membrane tank, the microorganisms and secretions thereof are gathered on the surface of the dynamic base membrane to form a floccule layer, the floccule layer has the effect of intercepting a muddy water mixture, most SS is intercepted outside the sedimentation unit, and the sewage entering the sedimentation unit is enabled to be clearer;
2. thereby can carry out the gas through regeneration aeration pipeline and scrub dynamic base film to the in-process system that does not need at the backwash does not need to shut down, and sustainable product water.
3. And a gas stripping mud returning component is arranged at the bottom end of the sedimentation unit, so that the mud generated by the sedimentation unit is returned to the interior of the dynamic membrane pool.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an autogenous dynamic membrane solid-liquid separator;
FIG. 2 is a schematic structural diagram of a precipitation unit in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a dynamic base film according to an embodiment of the present application.
Description of reference numerals: 1. a dynamic membrane tank; 2. a precipitation unit; 21. a sedimentation shell; 211. a housing; 2111. installing a cavity; 2112. a sludge zone; 212. an inner shell; 2121. a water inlet hole; 2122. a water producing point; 22. depositing filler by an inclined plate; 23. gas is extracted back to the mud component; 231. a mud inlet pipe; 232. a sludge discharge pipe; 233. gas stripping mud return pipeline; 24. a separator; 25. an exhaust pipe; 26. floating the ball; 3. a cross-flow shearing aeration device; 31. a cross-flow shearing aeration pipe group; 32. a cross-flow shearing aeration pipeline; 4. an air supply device; 5. a dynamic basement membrane; 51. an inner film layer; 52. an outer membrane layer; 53. a water storage cavity; 6. regenerating the aeration component; 61. regenerating an aeration pipe group; 62. regenerating an aeration pipeline; 7. an electrically controlled valve; 8. a separator.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a self-generated dynamic membrane solid-liquid separator.
Referring to fig. 1, the self-generated dynamic membrane solid-liquid separator comprises a dynamic membrane tank 1, a precipitation unit 2 immersed in the dynamic membrane tank 1, a cross-flow shearing aeration device 3 for stirring water in the dynamic membrane tank 1, and an air supply device 4 positioned outside the dynamic membrane tank 1, wherein the air supply device 4 adopts a fan. The air supply device 4 is communicated with the cross-flow shearing aeration device 3, and an air source is provided for the cross-flow shearing aeration device 3 through the air supply device 4.
The sedimentation unit 2 is fixed inside the dynamic membrane tank 1 through a connecting bracket. The top end of the sedimentation unit 2 is lower than the top tank opening of the dynamic membrane tank 1, and a distance is reserved between the bottom end of the sedimentation unit 2 and the tank bottom of the dynamic membrane tank 1.
A dynamic base membrane 5 is arranged inside the dynamic membrane pool 1, and the periphery and the bottom of the precipitation unit 2 are wrapped inside the dynamic base membrane 5. The dynamic basement membrane 5 is spaced from the precipitation unit 2 to form a water storage cavity. A regenerative aeration component 6 which aerates the interior of the dynamic membrane tank 1 is arranged in the dynamic membrane tank 1 and below the sedimentation unit 2. The regenerative aeration assembly 6 is positioned below the dynamic base membrane 5. The dynamic basement membrane 5 is used for primarily filtering the water entering the interior of the precipitation unit 2, and the water filtered by the dynamic basement membrane 5 enters the interior of the precipitation unit 2. Because the regeneration aeration component 6 is positioned below the precipitation unit 2 and the dynamic base membrane 5, when the regeneration aeration component 6 aerates the dynamic membrane tank 1, water in the dynamic membrane tank 1 flows upwards under the action of the regeneration aeration component 6, so that the outer surface of the dynamic base membrane 5 is washed, and filtered matters attached to the outer surface of the dynamic base membrane 5 are washed away.
The regenerative aeration assembly 6 includes a regenerative aeration tube group 61 positioned below the dynamic base film 5 and a regenerative aeration line 62 communicating the regenerative aeration tube group 61 with the air supply device 4. An electrically operated valve 7 is attached to the regeneration aeration line 62, and the connection or disconnection between the air supply device 4 and the regeneration aeration line 62 can be controlled by electrically controlling the valve 7.
The cross-flow shearing aeration device 3 comprises two cross-flow shearing aeration tube groups 31, and the two cross-flow shearing aeration tube groups 31 are positioned at two opposite sides of the sedimentation unit 2. The two cross-flow shearing aeration pipe groups 31 are respectively communicated with the air supply device 4 through cross-flow shearing aeration pipelines 32. The cross-flow shearing aeration pipe group 31 is communicated with the air supply device 4 through the cross-flow shearing aeration pipeline 32, the air supply device 4 provides an air source for the cross-flow shearing aeration pipe group 31, and the air entering the cross-flow shearing aeration pipe group 31 drives the sewage in the dynamic membrane pool 1 to flow upwards after being released from the cross-flow shearing aeration pipe group 31.
The partition plates 8 which are vertically arranged are also arranged inside the dynamic membrane tank 1, and the number of the partition plates 8 is the same as that of the cross-flow shearing aeration tube groups 31 and corresponds to that of the cross-flow shearing aeration tube groups one by one. The clapboard 8 and the dynamic membrane tank 1 are arranged in a transversely staggered way. The plate surface of the partition plate 8 faces the sedimentation unit 2, and the cross-flow shearing aeration tube group 31 is positioned on the side of the partition plate 8 facing the sedimentation unit 2 or the side facing away from the sedimentation unit 2.
Referring to fig. 1 and 2, the sedimentation unit 2 includes a sedimentation housing 21, the sedimentation housing 21 includes a housing 211, the housing 211 includes an installation cavity 2111 located above and a sludge area 2112 whose cross-sectional area is gradually reduced from top to bottom located below the installation cavity 2111, and the installation cavity 2111 and the sludge area 2112 are communicated with each other. An inner shell 212 with an open bottom end is arranged in the installation cavity 2111, and the bottom end of the inner shell 212 is fixedly connected with the inclined side wall of the sludge area 2112. The inner shell 212 is spaced from the side wall of the mounting cavity 2111 to form a water inlet passage. The bottom side wall of the inner shell 212 is provided with a water inlet 2121, and the inside of the inner shell 212 is communicated with the sludge area 2112. The interior of the inner shell 212 serves as a settling zone for the settling unit 2.
The inclined plate sedimentation packing 22 is arranged in the inner shell 212 from bottom to top in sequence. A water producing point 2122 is provided on the sidewall of the inner casing 212 at a position above all the inclined plate sedimentation packing 22, and the water producing point 2122 is used for discharging the water settled in the sedimentation unit 2 from the sedimentation unit 2.
The bottom of shell 211 is provided with the air stripping and returns mud subassembly 23, and air stripping returns mud subassembly 23 and includes the mud pipe 231 that advances that is fixed and is linked together with mud district 2112 with shell 211, advances mud pipe 231 and is vertical setting. The bottom end of the sludge inlet pipe 231 is fixed with a sludge discharge pipe 232 communicated with the inside of the sludge inlet pipe 231. The mud inlet pipe 231 and the mud discharging pipe 232 are vertically arranged. The portion of the sludge inlet pipe 231 communicated with the sludge discharge pipe 232 is located between two ends of the sludge discharge pipe 232. One end of the sludge discharge pipe 232 is bent upward. One end of the sludge discharge pipe 232 bent upwards is used as a sludge outlet end of the sludge discharge pipe 232. The other end of the sludge discharge pipe 232 is communicated with the air supply device 4 through an air-stripping sludge return pipeline 233.
When the air supply device 4 inflates the mud pipe 232 through the air-lifting mud return pipeline 233, the air pushes the mud entering the mud pipe 232 to move towards the mud outlet of the mud pipe 232 and to be sprayed out from the mud outlet of the mud pipe 232.
An electric control valve 7 is installed on the air-stripping mud return pipeline 233, and the connection or disconnection between the air supply device 4 and the mud discharge pipe 232 can be controlled through the electric control valve 7.
A separator 24 is provided inside the sludge zone 2112, and the separator 24 is a three-phase separator. An exhaust pipe 25 is provided on the separator 24 to communicate with the separator 24, one end of the exhaust pipe 25 communicates with an exhaust portion of the separator 24, and the other end of the exhaust pipe 25 extends outside the settling casing 21. The exhaust pipe 25 is used to discharge the gas separated in the separator 24 to the outside of the precipitation unit 2. The exhaust pipe 25 is a hose, a floating ball 26 is mounted at one end of the exhaust pipe 25 far away from the separator 24, and the floating ball 26 is used for enabling one end of the exhaust pipe 25 far away from the separator 24 to float on the liquid level all the time, so that air can be exhausted conveniently.
Referring to fig. 3, the dynamic base film 5 includes an inner film 51 and an outer film 52, wherein the sides of the inner film 51 and the outer film 52 are opposite to each other and fixedly connected to each other, and a water storage cavity 53 is formed between the inner film 51 and the outer film 52 after the sides of the inner film 51 and the outer film 52 are butted. The inner film layer 51 and the outer film layer 52 are water permeable films.
The use method of the regenerated dynamic membrane solid-liquid separator comprises the following steps:
during normal operation, the electric control valve 7 on the regeneration aeration pipeline 62 and the gas-lift sludge return pipeline 233 is closed, the air supply device 4 supplies air to the cross flow shearing aeration device 3, and under the blocking of the partition plate 8, water flow circulating up and down is formed in the dynamic membrane tank 1, so that the oxygen content in water is increased. The oxygen content of the water flow in the tank is sufficient, the microorganism grows actively, and the mud-water mixture fully reacts with the microorganism in the dynamic membrane tank 1. Under the effect of static pressure difference, microorganism and secretion accumulate and form a layer flocculus layer on the surface of developments base film 5 to play the effect of holding back sewage, make most SS be intercepted outside precipitation unit 2, only clear sewage gets into precipitation unit 2, and a small amount of activated sludge in the sewage subsides in mud district bottom after gathering, and the supernatant is discharged through precipitation unit 2's water production point, and MLSS concentration promotes by a wide margin in the dynamic membrane pond simultaneously.
When the dynamic base membrane 5 needs to be backwashed, the electric control valve on the regeneration aeration pipeline 62 is opened, the air supply device 4 supplies large-flow air to the regeneration aeration component 6, and the dynamic base membrane 5 is scrubbed. The system is not stopped during the backwashing process, and water is continuously produced. After the backwashing is finished, the electric control valve 7 is closed, and a floccule layer is formed on the surface of the dynamic base film 5 again and plays a role in intercepting sewage. In the backwashing process and the membrane regeneration process, a large amount of SS (suspended solids) enters the precipitation unit and is intercepted and precipitated under the blockage of the inclined plate precipitation filler 22 to enter the sludge zone 2112, so that the quality of produced water is not influenced. According to a system setting period, an electric control valve 7 on the air-lifting sludge return pipeline 233 is periodically opened, and the air supply device 4 provides air to provide power to lift the sludge in the sludge area 2112 of the precipitation unit 2 back into the dynamic membrane tank 1, so that sludge backflow is realized.
Through combining together sewage precipitation device and dynamic membrane technique, realize the huge promotion of water treatment effect, precipitation device goes out water quality SS index and obtains guaranteeing, need not to set up the sand filter again in the back. Meanwhile, the dynamic membrane intercepts most SS, the load of a subsequent precipitation unit is reduced, the design volume is greatly reduced, and the material consumption and the maintenance workload of the inclined plate are saved. MLSS concentration in the dynamic membrane tank is greatly improved, and compared with the degradation efficiency of pollutants in a common aerobic tank, the degradation efficiency of pollutants is greatly improved.
The dynamic membrane device with the composite structure does not need full-flow PLC control any more, the cost of an electric control unit is reduced, and the system continuously produces water without stopping.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. An autogenous dynamic membrane solid-liquid separator, characterized in that: comprises a dynamic membrane tank (1), a sedimentation unit (2) immersed in the dynamic membrane tank (1), a cross-flow shearing aeration device (3) for stirring the sewage in the dynamic membrane tank (1) and an air supply device (4) for providing an air source for the cross-flow shearing aeration device (3);
a distance is reserved between the bottom end of the sedimentation unit (2) and the bottom of the dynamic membrane tank (1);
the dynamic membrane pool (1) is also internally provided with a dynamic base membrane (5) which can enable water to penetrate through, the periphery and the bottom of the precipitation unit (2) are wrapped inside by the dynamic base membrane (5), and the water in the dynamic membrane pool (1) firstly penetrates through the dynamic base membrane (5) and then enters the precipitation unit (2) for precipitation treatment;
a regenerative aeration component (6) is further arranged in the dynamic membrane pool (1), the regenerative aeration component (6) is positioned below the outer side of the dynamic base membrane (5), and the regenerative aeration component (6) is connected with the air supply device (4) so that the air supply device (4) can provide an air source for the regenerative aeration component (6);
the regeneration aeration component (6) is provided with a control valve, and the control valve is used for controlling the disconnection or the connection between the regeneration aeration component (6) and the air supply device (4).
2. The autogenous dynamic membrane solid-liquid separator of claim 1, wherein: the sedimentation unit (2) comprises a sedimentation shell (21), and the sedimentation shell (21) comprises a shell (211) with an open top and a closed bottom end;
an installation cavity (2111) positioned above and a sludge area (2112) with the cross section area gradually reduced from top to bottom are arranged in the shell (211);
an inner shell (212) is arranged inside the mounting cavity (2111), and a water inlet channel is formed between the inner shell (212) and the side wall of the mounting cavity (2111);
the bottom end of the inner shell (212) is connected with the inclined side wall of the sludge area (2112), the side wall of the bottom end of the inner shell (212) is provided with a water inlet hole (2121), and the inner shell (212) is provided with a water producing point (2122) which is communicated with the inside of the inner shell (212) so as to discharge water;
a precipitation filler is arranged in the inner shell (212), and the water generating point (2122) is positioned above the precipitation filler;
the bottom of shell (211) is provided with the air stripping that feeds back the mud subassembly (23) in dynamic membrane pond (1) with the mud that deposits up in mud district (2112), air stripping return mud subassembly (23) with air supply device (4) are linked together.
3. An autogenous dynamic membrane solid-liquid separator as claimed in claim 2, wherein: the air-stripping mud return assembly (23) comprises a mud inlet pipe (231) which is vertically arranged and is communicated with a mud area (2112), the mud inlet pipe (231) is located on the outer side of the bottom end of the shell (211), a mud discharge pipe (232) which is communicated with the mud inlet pipe (231) is arranged at the bottom end of the mud inlet pipe (231), the communicating part between the mud inlet pipe (231) and the mud discharge pipe (232) is located between two ends of the mud discharge pipe (232), one end of the mud discharge pipe (232) is a mud outlet end of the mud discharge pipe (232), the other end of the mud discharge pipe (232) is communicated with the air supply device (4) through a mud return pipeline (233), and a control valve is installed on the air-stripping mud return pipeline (233).
4. An autogenous dynamic membrane solid-liquid separator as claimed in claim 3 wherein: the mud outlet end of the exhaust pipe (25) is bent upwards.
5. An autogenous dynamic membrane solid-liquid separator as claimed in claim 2 wherein: the inside in mud district (2112) still is provided with separator (24) and blast pipe (25), blast pipe (25) one end with separator (24) link to each other, the other end of blast pipe (25) stretches out to the outside of shell (211), separator (24) adopt three-phase separator (24), blast pipe (25) are used for the gas outgoing who separates separator (24).
6. An autogenous dynamic membrane solid-liquid separator as claimed in claim 5 wherein: the exhaust pipe (25) adopts a hose, a floating object is arranged at one end of the exhaust pipe (25) extending out of the shell (211), and the exhaust end of the exhaust pipe (25) is always positioned on the liquid level through the floating object.
7. The autogenous dynamic membrane solid-liquid separator of claim 1, wherein: the dynamic base membrane (5) comprises an inner membrane layer (51) and an outer membrane layer (52) which can enable water to penetrate through, and a water storage cavity (53) is arranged between the inner membrane layer (51) and the outer membrane layer (52).
8. The autogenous dynamic membrane solid-liquid separator of claim 1, wherein: the cross-flow shearing aeration device (3) comprises a cross-flow shearing aeration pipe group (31) positioned at the bottom of the dynamic membrane pool (1), the cross-flow shearing aeration pipe group (31) is communicated with the air supply device (4) through a cross-flow shearing pipeline, a vertically arranged partition plate (8) is arranged inside the dynamic membrane pool (1), a distance is reserved between the partition plate (8) and the bottom of the dynamic membrane pool (1), and the partition plate (8) and the cross-flow shearing pipe group are transversely arranged in a staggered mode.
9. The autogenous dynamic membrane solid-liquid separator of claim 8, wherein: the number of the cross-flow shearing aeration tube groups (31) is two, the two cross-flow shearing aeration tube groups are respectively positioned at two opposite sides of the sedimentation unit (2), and the number of the partition plates (8) is the same as that of the cross-flow shearing aeration tube groups (31) and corresponds to that of the cross-flow shearing aeration tube groups one by one.
10. A method of using an autogenous dynamic membrane solid-liquid separator according to any one of claims 1 to 9, characterized in that the specific method of use is as follows: during normal work, a control valve on the regeneration aeration component (6) is closed, the air supply device (4) supplies air into the cross-flow shearing aeration device (3), the cross-flow shearing aeration device (3) enables the dynamic membrane tank (1) to form up-and-down circulating water flow, meanwhile, the oxygen content in water is increased in the dynamic membrane tank (1), the growth of microorganisms is promoted, the microorganisms and secretions thereof gather and form a floccule layer on the surface of the dynamic base membrane (5), a sewage interception effect is achieved, and SS is intercepted outside the sedimentation unit (2);
when the dynamic base membrane (5) needs to be backwashed, a control valve on the regeneration aeration pipeline (62) is opened, and the air supply device (4) supplies air to the regeneration aeration component (6), so that the dynamic base membrane (5) is scrubbed; after the backwashing is finished, the regeneration aeration pipeline (62) is closed, and a floccule layer is formed on the surface of the dynamic base membrane (5) again to intercept the sewage.
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| CN103496784A (en) * | 2013-10-21 | 2014-01-08 | 东华大学 | Self-forming dynamic membrane bioreactor using aerobic granule sludge |
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Application publication date: 20220722 |