CN112973204A - Aeration rotational flow grit chamber with centrifugal slag discharge function - Google Patents
Aeration rotational flow grit chamber with centrifugal slag discharge function Download PDFInfo
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- CN112973204A CN112973204A CN202110198844.1A CN202110198844A CN112973204A CN 112973204 A CN112973204 A CN 112973204A CN 202110198844 A CN202110198844 A CN 202110198844A CN 112973204 A CN112973204 A CN 112973204A
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- 238000005273 aeration Methods 0.000 title claims abstract description 43
- 239000002893 slag Substances 0.000 title claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000010865 sewage Substances 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000011282 treatment Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 239000003818 cinder Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005201 scrubbing Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0003—Making of sedimentation devices, structural details thereof, e.g. prefabricated parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides an aeration rotational flow grit chamber with a centrifugal slag discharge function. The sand settling device comprises a concentric circular inner tank and a concentric circular outer tank, wherein the circular inner tank is used as a rotational flow sand settling tank for sand settling, and the circular outer tank is used for removing scum and taking sand washing and sand settling into consideration; the wall of the circular inner pool is used as the inner wall of the annular outer pool, the water outlet of the circular inner pool is formed in the side wall of the inner pool and is used as the water inlet of the outer pool, and the circular inner pool comprises an inner pool rotational flow stirrer; the annular outer pool comprises an annular overflow effluent weir arranged on one side pool wall of the inner circle of the annular outer pool, a slag discharge groove arranged on one side pool wall of the outer circle of the annular outer pool and a flow impeller positioned in the middle of the annular plane flow channel of the outer pool. The invention solves the problem that the traditional rotational flow grit chamber can not remove scum, the circular inner chamber is used for settling sand, the annular outer chamber is mainly used for removing scum and simultaneously washing sand and settling sand, the inner chamber and the outer chamber are tightly combined and mutually supplemented, and the functions of settling sand and removing scum are completely finished.
Description
Technical Field
The invention relates to the technical field of grit chambers, in particular to an aeration rotational flow grit chamber with a centrifugal slag discharge function.
Background
The grit chamber is an important component of primary sewage treatment, and the rotational flow grit chamber is a classic grit chamber process. The grit chamber is mainly used for removing the particles with the diameter larger than 0.2mm and the density larger than 2.65t/m in the sewage3To protect pipes, valves, etc. from wear and clogging. The working principle of the grit chamber is based on gravity separation, so that inorganic particles with large specific gravity sink, and organic suspended particles can be taken away along with water flow. Two types of grit chambers commonly used in practical engineering are cyclone grit chambers and aeration grit chambers. The cyclone grit chamber has the advantages of good sand removing effect and small occupied area, and has the defect that only inorganic sand grains can be removed but scum in sewage cannot be removed. The aeration grit chamber has the advantages of long retention time, cleaner sand grains after aeration and scrubbing, and scum skimming function, and has the defects of large floor area, equal water treatment amount, and 5 to 6 times of the floor area of the aeration grit chamber as large as that of the cyclone grit chamber. In summary, the selection of the grit chamber process for sewage treatment often faces two difficulties, namely selecting a cyclone grit chamber which occupies a small area but cannot remove scum, or selecting an aeration grit chamber which occupies a large area but can remove scum. When the available area is small, a cyclone grit chamber is often selected, but the scum removal function is sacrificed at the time.
Disclosure of Invention
According to the technical problems, the invention provides an aeration rotational flow grit chamber with a centrifugal slag discharge function, which is used for a grit chamber link of a primary treatment system of a sewage treatment plant and solves the problems that a rotational flow grit chamber and an aeration grit chamber have respective advantages and disadvantages in two most common grit chamber types when the grit chamber is designed and selected. On the basis of the cyclone grit chamber, the functions of washing sand through perforation aeration, extracting slag and utilizing the height difference of the inner circumference and the outer circumference of the sewage centrifugal cyclone to automatically skim slag are realized, the defect that the scum can not be removed in the conventional cyclone grit chamber is overcome, and the cyclone grit chamber has the function of secondary grit. The technical means adopted by the invention are as follows:
an aeration rotational flow grit chamber with a centrifugal slag discharge function comprises a concentric circular inner chamber and a circular outer chamber, wherein the circular inner chamber is used as a rotational flow grit chamber for sand settling, and the circular outer chamber is used for removing scum, and simultaneously performing sand washing and sand settling; the wall of the circular inner pool is used as the inner wall of the annular outer pool, the water outlet of the circular inner pool is formed in the side wall of the inner pool and is used as the water inlet of the outer pool, and the circular inner pool comprises an inner pool rotational flow stirrer; the annular outer pool comprises an annular overflow effluent weir arranged on one side pool wall of the inner circle of the annular outer pool, a slag discharge groove arranged on one side pool wall of the outer circle of the annular outer pool and a flow impeller positioned in the middle of the annular plane flow channel of the outer pool.
Furthermore, the water inlet pipe of the inner pool is a D-shaped pipe, the straight edge of the D-shaped pipe is installed along the tangential direction of the side wall of the circular inner pool, the water outlet of the inner pool is located at a position where the water inlet pipe of the inner pool is close to the position of rotating for a circle, and the bottom of the water outlet of the inner pool is higher than the top of the water inlet pipe of the inner pool.
Further, the inner wall of the inner pool contacting with sewage adopts wear-resistant concrete or wear-resistant nylon plates embedded with arc-shaped laminates.
Furthermore, the impeller is used for pushing water flow in the outer pool to rotate at a preset speed, the linear velocity of the outer edge of the water flow is larger than 1.5m/s, the liquid level of the outer edge of the water flow is higher than that of the liquid level of the inner edge by more than 10mm, and the top of the slag discharging groove is lower than that of the outer edge, so that scum naturally falls into the slag discharging groove when flowing through the slag skimming bucket and is discharged out of the pool body of the grit chamber.
Furthermore, the upper part of the single-side section of the outer tank is rectangular, the bottom of the single-side section of the outer tank is in a wedge shape, two sand discharge pipes are obliquely arranged downwards along an angle of 60 degrees in a sand setting hopper of the outer tank, the sand discharge pipes are communicated with the bottom sand hopper of the inner tank, a butterfly-shaped one-way valve is installed at the position where the sand enters the inner tank, and the bottom of the wedge shape is used for recovering clean sand.
Furthermore, an annular perforated aerator pipe is arranged on the inner side of the annular plane flow channel of the outer tank, and is positioned at the boundary of the rectangular part of the outer tank and the wedge-shaped grit chamber in the vertical direction; the annular perforated aeration pipe is provided with a hole downwards along the bottom, and an aeration air source is connected with an external air blower, and the aeration slag-stripping function is realized under the interaction of a flow impeller and the aeration.
Furthermore, the heights of the weir plates of the overflow effluent weir and the slag discharge groove of the outer pool are adjusted through the long holes and the bolts.
Further, the rotating direction of the impeller of the flow impeller is consistent with the rotational flow direction formed by the water flow in the tank along with aeration.
Furthermore, the annular outer pool is of an overhanging structure, and a sand-water separator and a dry sand receiving trolley are arranged in the lower space outside the pool.
The invention has the following advantages:
1. the problem of traditional whirl grit chamber can't get rid of the dross is solved.
2. Solves the problem that the traditional aeration grit chamber can remove sand and scum simultaneously but occupies large area.
3. The projected area of the tank body is increased by about 2 times compared with the traditional cyclone grit chamber, but is only equivalent to about 50 percent of the aerated grit chamber with the same treatment capacity. But because the outer pond adopts the structure of encorbelmenting, cell body bottom area does not increase, and is the same with traditional whirl grit chamber completely.
4. The circular inner tank is used for sand setting, the annular outer tank is mainly used for removing scum, and taking sand washing and sand setting into consideration, the inner tank and the outer tank are tightly combined and mutually supplemented, and the functions of sand setting and scum removal are completely finished.
5. The outer tank carries out accurate deslagging on the outer circle skillfully through the height difference of the inner circle and the outer circle formed by the centrifugal annular water flow and the characteristic that floating slag floats to the outer circle under the centrifugal action, and overflows to discharge water on the inner circle.
6. The water inlet pipe of the inner pool adopts a D-shaped pipe, which is favorable for forming circulation by means of the flow velocity of inlet water; the water outlet pipe of the inner tank adopts an inclined upward water outlet and controls the water outlet to be in a laminar flow state, so that the impact on the circulation of the outer tank is avoided.
7. The sand deposited at the bottom of the outer tank is discharged into the sand hopper of the inner tank by adopting a sand discharge pipe and a butterfly-shaped one-way valve, and when the inner tank discharges sand, the outer tank discharges sand simultaneously, so that the short flow of the inner tank and the outer tank is avoided.
8. The outer pond is the structure of encorbelmenting, and equipment such as sand water separator, dry sand receiving dolly can be arranged to the bottom outside the pond, make full use of the space.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a top plan view of the present invention.
Fig. 2 is a top view of the underside of the outer basin weir.
Cross-sectional view 1-1 of figure 3.
Fig. 4 is a cross-sectional view 2-2 of fig. 1.
Fig. 5 is a cross-sectional view of 3-3 of fig. 1.
Fig. 6 is a cross-sectional view of 4-4 of fig. 1.
FIG. 7 is a schematic view of the high and low liquid levels of the outer tank in the annular swirling state in the embodiment of the invention.
In the figure: 1. an inner pool; 2. d-shaped pipes for water entering the inner pool; 3. a water outlet of the inner pool; 4. an inner pool rotational flow stirrer; 5. an outer pool; 6. an annular perforated aeration pipe of the outer tank; 7. an outer pool impeller; 8. an outer pool overflow effluent weir; 9. an outer pool drain pipe; 10. an outer tank slag discharging groove; 11. an outer tank sand discharge pipe; 12. a butterfly-shaped one-way valve of the sand discharge pipe of the outer tank; 13. an outer tank slag discharge pipe; 14. the outer pool splits sharp shape sand setting fill.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, the embodiment of the invention discloses an aeration rotational flow grit chamber with a centrifugal slag discharge function, which comprises a concentric circular inner chamber 1 and a concentric circular outer chamber 5, wherein the circular inner chamber is used as a rotational flow grit chamber for sand settling, and the circular outer chamber is used for removing scum and taking sand washing and sand settling into account; the function of the inner tank is the same as that of the traditional rotational flow grit chamber, but 3 optimized improvements are made on the basis of the traditional rotational flow grit chamber. The outer pool has 4 functions, which are respectively: aeration sand washing, aeration slag extraction, centrifugal circulation automatic slag skimming and bottom sand discharge. The wall of the circular inner tank is used as the inner wall of the annular outer tank, the water outlet of the circular inner tank is formed in the side wall of the inner tank and is used as the water inlet of the outer tank, the circular inner tank is in a shape of a flat square hole which is inclined upwards, the flow velocity of sewage passing through the square hole is controlled to be 0.3m/s, and the Reynolds number Re of the sewage passing through the hole is ensured to belong to a laminar flow state so as to reduce the impact on the annular flow state of the outer tank as much as possible. The circular inner tank comprises an inner tank rotational flow stirrer 4; the annular outer pool comprises an annular overflow effluent weir arranged on one side pool wall of the inner circle of the annular outer pool, a slag discharge groove arranged on one side pool wall of the outer circle of the annular outer pool and a flow impeller 7 positioned in the middle of the annular plane flow channel of the outer pool, wherein the flow impeller is also arranged in the middle of the vertical direction, and 2 flow impellers are arranged in an axial symmetry manner.
The water inlet pipe 2 of the inner tank is a D-shaped pipe, and compared with a round pipe or a square pipe, the D-shaped pipe is beneficial to enabling sewage water flow to be attached to the tank wall as much as possible to form rotational flow through the aid of water inlet kinetic energy. The straight edge of the D-shaped pipe is arranged along the tangential direction of the side wall of the circular inner pool, and the water outlet 3 of the inner pool is positioned at the position, close to a circle of rotation, of the water inlet pipe of the inner pool when viewed from the plane, so that the rotational flow state of the D-shaped pipe can be maintained, and short flow can be avoided; seen from the front section direction, the bottom of the water outlet of the inner tank is higher than the top of the water inlet pipe of the inner tank, so that the separation of sewage with high density, namely high sand content, and sewage with low density, namely low sand content, is facilitated after the sewage enters the tank body, and the separation of sand grains and the outflow of the sewage are not interfered with each other.
The inner wall of the inner tank contacting with sewage adopts wear-resistant concrete or a wear-resistant nylon plate with the thickness of 10mm embedded with arc-shaped fitting, and the problem that a concrete protective layer is worn by sand grains to expose reinforcing steel bars after the traditional rotational flow grit chamber is operated for a long time is solved.
The top of annular overflow effluent weir 8 is less than the top of row's cinder notch 10, it is equipped with the row's cinder pipe 13 of connecting the outside to arrange the cinder notch, outer pond still is equipped with drain pipe 9, and the concrete numerical value of both differences in height is calculated by the design treatment water yield and is confirmed, guarantees under certain design treatment water yield through calculating, even when the annular outer pond sewage stops the annular when rotatory, and pond liquid level elevation still is less than the top elevation of arranging the cinder notch, and sewage can not follow row cinder notch outflow promptly.
The impeller is used for promoting rivers in the outer pond rotatory with predetermineeing the speed, rivers outward flange linear velocity is greater than 1.5m/s, the outward flange liquid level of rivers is higher than the inward flange liquid level more than 10mm, rivers are when the inside quick rotation in cyclic annular outer pond, under the effect of centrifugal force, the dross automatic showy to outward flange one side of outer pond sewage surface continues around the pond rotation, inward flange and outward flange form the difference in height under the effect of centrifugal force this moment, the scum groove top is less than about 5mm of outward flange liquid level, it flows in the scum groove to make the dross flow through naturally fall when skimming fill, and then discharge outside the grit chamber.
The upper part of the single-side section of the outer tank is rectangular, the bottom of the single-side section of the outer tank is in a wedge shape, two sand discharge pipes are obliquely arranged downwards along an angle of 60 degrees in a sand setting hopper of the outer tank, the sand discharge pipes are communicated with the bottom sand hopper of the inner tank, a butterfly-shaped one-way valve is installed at the position where the sand enters the inner tank, and the wedge-shaped bottom of the single-side section of the outer tank is used for recovering clean sand.
An annular perforated aerator pipe 6 is arranged on the inner side of the annular plane flow channel of the outer tank, and is positioned at the boundary of the rectangular part of the outer tank and the wedge-shaped grit chamber in the vertical direction; the annular perforation aeration pipe is trompil downwards along its bottom, and the air supply of aeration connects from outside air-blower, and compressed gas is discharged into outer pond sewage by aeration socle portion in, and the bubble is rapid rebound under the buoyancy effect, and then drives the impurity upflow that sewage and density are lighter around the bubble. Meanwhile, the water flow is pushed by the flow pushing device to circularly flow in the horizontal direction, and the circular flow in the horizontal direction formed by the flow pushing device and the circular flow in the vertical direction formed by floating of bubbles are combined into a three-dimensional spiral circular flow, namely, the water flow circularly flows in the cross section direction of the outer pool and horizontally circularly flows along the outer pool. Under the interaction of the bubbles and the water flow, scum which is originally close to water in density and is not easy to float is carried to the top of the liquid level, and the function of aeration and slag removal is realized; meanwhile, the non-soluble impurities attached to the sand grains are separated from the sand grains under the action of bubble scrubbing, the separated impurities become scum which floats on the liquid level, and cleaner sand grains sink to the bottom of the wedge-shaped sand settling hopper of the external tank.
The inner tank mainly has a sand settling function, the outer tank mainly has a scum removing function, sand discharging is considered, and sediment deposition is inevitable under the action of gravity when the outer tank operates, so that the outer tank has a secondary sand settling function. The bottom of the outer basin is thus designed as a wedge-shaped grit chamber 14 at an angle of 60 ° to the horizontal. Two sand discharge pipes 11 are obliquely arranged downwards along the sand setting hopper of the outer tank at an angle of 60 degrees, the sand discharge pipes are communicated with the sand hopper at the bottom of the inner tank, and a butterfly-shaped one-way valve 12 (namely a flap valve) is arranged at the position where the sand enters the inner tank. When the inner tank is in a non-sand discharging state, the liquid level of the inner tank is slightly higher than that of the outer tank, so that the butterfly-shaped one-way valve is in a closed state under the action of water pressure; when the inner tank is used for pumping sand, the bottom of the inner tank is instantaneously in a relative negative pressure state, the butterfly-shaped check valve is automatically opened under the action of the water pressure of the outer tank, the silt at the bottom of the outer tank is discharged into the bottom of the inner tank, and the silt at the bottom of the inner tank is pumped away together. And after the sand pumping of the inner tank is finished, the butterfly one-way valve is closed under the action of the water pressure of the inner tank.
The heights of the weir plates of the overflow effluent weir and the slag discharge groove of the outer pool are adjusted through the long holes and the bolts so as to adapt to different water treatment amounts.
The rotating direction of the impeller is consistent with the rotational flow direction of the water flow in the tank along with aeration.
The annular outer tank is of an overhanging structure, and a sand-water separator, a dry sand receiving trolley and other equipment can be arranged in the lower space outside the tank.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An aeration rotational flow grit chamber with a centrifugal slag discharge function is characterized by comprising a concentric circular inner chamber and a concentric circular outer chamber, wherein the circular inner chamber is used as a rotational flow grit chamber for sand setting, and the circular outer chamber is used for removing scum and taking sand washing and sand setting into consideration; the wall of the circular inner pool is used as the inner wall of the annular outer pool, the water outlet of the circular inner pool is formed in the side wall of the inner pool and is used as the water inlet of the outer pool, and the circular inner pool comprises an inner pool rotational flow stirrer; the annular outer pool comprises an annular overflow effluent weir arranged on one side pool wall of the inner circle of the annular outer pool, a slag discharge groove arranged on one side pool wall of the outer circle of the annular outer pool and a flow impeller positioned in the middle of the annular plane flow channel of the outer pool.
2. An aeration rotational flow grit chamber with centrifugal slag discharging function as in claim 1, wherein the water inlet pipe of the inner tank is a D-shaped pipe, the straight edge of the D-shaped pipe is installed along the tangential direction of the circular inner tank side wall, the water outlet of the inner tank is located at the position where the water inlet pipe of the inner tank is approximately rotated for one circle, and the bottom of the water outlet of the inner tank is higher than the top of the water inlet pipe of the inner tank.
3. An aeration rotational flow grit chamber with centrifugal deslagging function according to claim 1, wherein the inner wall of the inner tank contacting with sewage adopts wear-resistant concrete or wear-resistant nylon plate inlaid with arc-shaped joint.
4. An aeration rotational flow grit chamber with centrifugal slag discharging function as claimed in claim 1, wherein said impeller is used to push the water flow in the outer tank to rotate at a preset speed, the linear velocity of the outer edge of the water flow is greater than 1.5m/s, the liquid level of the outer edge of the water flow is higher than the liquid level of the inner edge by more than 10mm, and the top of the slag discharging groove is lower than the liquid level of the outer edge, so that the scum naturally falls down to flow into the slag discharging groove when flowing through the slag skimming bucket, and then is discharged out of the grit chamber.
5. An aeration rotational flow grit chamber with centrifugal slag discharging function as claimed in claim 1, wherein the upper part of the single side section of said outer tank is rectangular, the bottom part of the outer tank is in the shape of an oblique wedge, the sand setting hopper of the outer tank is provided with two sand discharging pipes which are obliquely downwards along 60 degrees, the sand discharging pipes are communicated with the bottom sand hopper of the inner tank, a butterfly-shaped one-way valve is arranged at the position entering the inner tank, and the bottom part of the oblique wedge is used for recovering clean sand.
6. An aeration rotational flow grit chamber with centrifugal slag discharging function as claimed in claim 1, wherein an annular perforated aeration pipe is arranged inside the annular plane flow passage of the outer tank, and the vertical direction is positioned at the boundary of the rectangular part of the outer tank and the wedge-shaped grit chamber; the annular perforated aeration pipe is provided with a hole downwards along the bottom, and an aeration air source is connected with an external air blower, and the aeration slag-stripping function is realized under the interaction of a flow impeller and the aeration.
7. An aeration rotational flow grit chamber with centrifugal slag discharge function as in claim 1, wherein the heights of the weir plates of the overflow effluent weir and the slag discharge groove of the outer tank are adjusted by long holes and bolts.
8. An aeration rotational flow grit chamber with centrifugal deslagging function as recited in claim 1 wherein the impeller rotation direction of the impeller is in accordance with the rotational flow direction of the water flow in the chamber formed by aeration.
9. An aeration rotational flow grit chamber with centrifugal deslagging function according to claim 1, characterized in that the annular outer chamber is of an overhanging structure, and a sand-water separator and a dry sand receiving trolley are arranged in the lower space outside the chamber.
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| CN202110198844.1A CN112973204B (en) | 2021-02-22 | 2021-02-22 | Aeration rotational flow grit chamber with centrifugal slag discharge function |
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2021
- 2021-02-22 CN CN202110198844.1A patent/CN112973204B/en active Active
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| GB976805A (en) * | 1960-05-18 | 1964-12-02 | Schreiber August | Improved process and apparatus for sewage clarification by means of activated sludge |
| US5540836A (en) * | 1994-06-16 | 1996-07-30 | Coyne; Thomas J. | Wastewater treatment system and method |
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