CN110917676A - A whirl grit chamber for town sewage - Google Patents
A whirl grit chamber for town sewage Download PDFInfo
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- CN110917676A CN110917676A CN201911303320.3A CN201911303320A CN110917676A CN 110917676 A CN110917676 A CN 110917676A CN 201911303320 A CN201911303320 A CN 201911303320A CN 110917676 A CN110917676 A CN 110917676A
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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
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
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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
- B01D21/02—Settling tanks with single outlets for the separated liquid
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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
- B01D21/26—Separation of sediment aided by centrifugal force or centripetal force
- B01D21/265—Separation of sediment aided by centrifugal force or centripetal force by using a vortex inducer or vortex guide, e.g. coil
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention discloses a rotational flow grit chamber for town sewage, which relates to the technical field of sewage treatment and comprises a chamber body, a chamber cover, a mixing drum and a gas stripping device, wherein the chamber body is divided into a sorting area and a sand collecting area; the upper end of the mixing drum is rotatably connected with the lower part of the tank cover, and the side wall of one end of the mixing drum far away from the tank cover is provided with a helical blade which extends downwards along the outer side wall of the mixing drum in a helical manner; the gas stripping device comprises a three-phase separator, a gas stripping pipe and a gas inlet pipe communicated with the gas stripping pipe; a water inlet and a water outlet are arranged on the sorting area, and the direction of water flow formed by the water inlet is horizontally tangent to the edge of the blade of the propeller; the water inlet is arranged at one end of the separation area close to the tank cover. According to the invention, the spiral blades are pushed to rotate by water flow to form vortex in the grit chamber, a motor and a gearbox for driving the spiral blades to rotate are not required to be additionally arranged, and the spiral blades vertically and spirally downwards do not easily form secondary vortex in the sand collection area to roll up sand deposited in the sand collection area.
Description
Technical Field
The invention relates to the technical field of town sewage treatment, in particular to a rotational flow grit chamber for town sewage.
Background
The cyclone grit chamber settles sand particles by means of the combined action of the gravity of the sand particles and the centrifugal force generated by the vortex flow in the chamber. Sewage flows into the sand settling area from the tangential direction, the blades are driven to rotate by the motor and the transmission device to form vortex to generate centrifugal force to throw sand grains with high specific gravity to the wall of the pool, so that the sand grains fall into the sand hopper, and organic matters are separated from the sand grains and are left in the sewage. Compared with the traditional horizontal flow type grit chamber and aeration grit chamber, the rotational flow grit chamber has the common advantages of small occupied area, high sand removing efficiency, low civil engineering cost and reliable equipment operation.
The spiral-flow type grit chamber mainly comprises a proportional type grit chamber and a bell-shaped grit chamber.
The Bischs grit chamber consists of a water inlet channel, a grit sorting area, a grit collecting area, a water outlet channel, a sand suction pipe, a sand discharge pipe, a sand pump and a motor. The design of the Bischner sand basin adopts the vortex principle. The sand-containing wastewater enters the tank body from the water inlet channel, and the water inlet turbulence is counteracted to the lowest degree because the water inlet channel is straight. The slope at the end of the inlet channel can produce a Coanda Effect (Coanda Effect) so that part of the sand particles which have settled in the inlet channel can slide down the slope into the basin. The spoiler at the water inlet can reduce the impact of inflow water flow on the rotational flow water body in the pool body, and make the water flow impacting on the spoiler turn over to the bottom plate of the sorting area and flow along the periphery of the grit chamber, so the small pool body is generally arranged in the small pool body due to poor impact resistance. The axial propeller brings water flow to the center of the pool in the rotating process, then the water flow moves upwards, collides with the top of the pool, is folded to the wall of the pool and collides with the bottom of the pool, and thus a vortex-shaped water flow is formed. In the process, heavier sand grains fall into the sand collecting area from the central annular hole when being carried to the center of the pool by the propeller, and lighter organic matters are separated from the sand grains and return to the sand basin separation area along with the upward flow of water, and finally flow out of the pool body. The upward water flow generated by the rotation of the propeller will further strip the organic matter attached to the sand grains and in the middle of the sand grains back into the sewage before the sand grains fall through the propeller into the sand collection area.
The bell-type grit chamber consists of a water inlet channel, a grit sorting area, a grit collecting area, a water outlet channel, a sand lifting pipe, a sand discharge pipe, a motor and a gearbox. The included angle between the water inlet direction and the water outlet direction of the Belleville grit chamber is 270 degrees, the separation area is provided with a slope, and a cover plate is not arranged between the two areas. The driving device is a turntable with a radial impeller, and pushes water flow upwards in the slow rotation process. Because the bottom of the separation area of the Belleville grit chamber has a certain gradient, the sand grains settled at the bottom of the separation area can settle by means of gravity.
Disclosure of Invention
Aiming at the prior art, the invention provides a rotational flow grit chamber for urban sewage, which utilizes water flow to push a helical blade to rotate to form a vortex in the grit chamber, a motor and a gearbox for driving the helical blade to rotate are not required to be additionally arranged, the helical blade vertically and spirally faces downwards, secondary vortex is not easy to form in a sand collecting area, and sand deposited in the sand collecting area is rolled up.
The invention is realized by the following technical scheme: a rotational flow grit chamber for urban sewage comprises a cylindrical chamber body, wherein the chamber body is sequentially divided into a separation area and a sand collection area from top to bottom, the separation area and the sand collection area are connected through a sand collection platform extending along the circumferential direction of the axis of the chamber body, and the rotational flow grit chamber comprises a chamber cover arranged on the chamber body, a mixing drum vertically arranged in the chamber body and an air lifting device;
the upper end of the mixing drum is rotatably connected with the lower part of the tank cover, and the side wall of one end of the mixing drum far away from the tank cover is provided with a helical blade which extends downwards along the outer side wall of the mixing drum in a helical manner;
the gas stripping device comprises a three-phase separator, a gas stripping pipe and a gas inlet pipe communicated with the gas stripping pipe; the three-phase separator is arranged on the tank cover, one end of the gas stripping pipe is connected with the three-phase separator, one end of the gas stripping pipe, far away from the three-phase separator, penetrates through the tank cover and extends vertically downwards to the lower part of the sand collection area along the interior of the stirring cylinder, and the communicating part of the gas inlet pipe and the gas stripping pipe is close to one end of the gas stripping pipe, far away from the three-phase separator;
a water inlet and a water outlet are arranged on the sorting area, and the direction of water flow formed by the water inlet is horizontally tangent to the edge of the blade of the propeller; the water inlet is arranged at one end of the separation area close to the tank cover.
The axes of the separation area and the sand collecting area are on the same straight line, and the radial size of the separation area is larger than that of the sand collecting area. And a tank cover is fixedly arranged on the tank body and used for installing a mixing drum and a three-phase separator.
The air inlet pipe and the air stripping pipe are arranged in the stirring cylinder, extend out of the stirring cylinder along the stirring cylinder and extend to the lower part of the sand collecting area; the expansion length of the helical blade is larger than the radius of the sand collection area but smaller than the radius of the sorting area, namely, the helical blade extends to the sand collection platform, and when the helical blade rotates, sandstone deposited on the sand collection platform can be disturbed, so that the sandstone is deposited to the sand collection area.
The air inlet pipe is externally connected with an air pump, and air is filled into the air stripping pipe to realize air stripping of the sand-water mixture. And after the sand-water mixture is subjected to gas stripping in the three-phase separator, performing gas-solid-liquid three-phase separation to obtain sand, and discharging the sand through a sand discharge pipe connected with the three-phase separator.
Further, the spread length of the helical blade is reduced from top to bottom. The helical blades extend from the sorting zone to the sand collection zone. The spreading length of one end, close to the pool cover, of the spiral blade is between the radius of the sorting area and the radius of the sand collecting area, and the spreading length of one end, close to the bottom surface of the sand collecting area, of the spiral blade gradually tends to zero. The helical blades which are sequentially reduced from top to bottom enable the sand-containing sewage to form a vortex from the sorting area to the upper part of the sand collecting area in the tank body, so that organic matters on sand and stones are continuously washed away by water flow in the sedimentation process, and better separation of the organic matters from the sand and the stones is achieved.
Furthermore, the water inlet includes a plurality of circumference evenly distributed water inlet pipe mouths on the separation district lateral wall, every water inlet pipe mouth's the water current direction of intaking all is tangent with helical blade border level. Every water inlet pipe's rivers direction all follows clockwise or all follows anticlockwise, and the multiple spot promotes helical blade along clockwise rotation or anticlockwise rotation, forms the vortex, and the vortex drives rivers clockwise or anticlockwise rotation simultaneously, can further promote helical blade's rotation again, makes its helical blade's rotational speed reach the best degritting rotational speed.
Furthermore, the sand collecting platform is an annular inclined platform which inclines downwards, so that sand deposited on the sand collecting platform can slide down to a sand collecting area under the action of gravity along with water flow, the sand is not easy to deposit on the sand collecting platform, and a good sand collecting effect is achieved.
Preferably, the angle between the sand collecting platform and the horizontal plane is 12 +/-1.5 degrees.
Furthermore, a guide plate which inclines downwards is arranged on the side wall of the air stripping pipe close to the bottom surface of the sand collecting area. The guide plate extends obliquely from the middle of the sand collecting area to the side wall of the sand collecting area, but a gap is formed between the guide plate and the side wall of the sand collecting area, so that sand can be deposited on the bottom surface of the sand collecting area from the gap.
Due to the vortex action, the gravels deposited in the sand collecting area are gathered towards the middle of the bottom surface of the sand collecting area, so that the air stripping pipe is easy to block, and the gravels are difficult to discharge. The guide plate that inclines makes sedimentary grit scatter around the gas stripping pipe, is difficult for blockking up the gas stripping pipe, makes the grit chamber continuously work, reduces and overhauls number of times and interval time.
Further, the angle of guide plate and air stripping pipe is 30~ 45. And the gap between one end of the flow guide plate, which is far away from the gas stripping pipe, and the side wall of the sand collection area is not less than 1/2 of the radius of the sand collection area.
Furthermore, the side wall of the sand collection area close to the bottom surface is provided with an emptying pipe extending to the lower part of the air lifting pipe, and the emptying pipe is externally connected with an air pump or a sand lifting pump. When the air stripping pipe is blocked by sand, the air release pipe can be filled with gas to disturb the sand blocking the air stripping pipe or the air release pipe can be used for pumping out the sand blocking the air stripping pipe, so that the smoothness of the air stripping pipe can be recovered, the sand basin is not required to be stopped and drained for overhauling, and the overhauling cost of the sand basin is reduced.
Furthermore, the rotational flow grit chamber still includes the inlet channel with the water inlet intercommunication, the inlet channel slope sets up outside the cell body downwards, increases the velocity of flow and the impact force of water inlet. The water inlet pipe orifice is arranged obliquely downwards, so that water flow formed by the water inlet is inclined downwards, and the spiral blades are better pushed to rotate.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the rotational flow grit chamber for urban sewage, provided by the invention, the spiral blades are pushed to rotate by water flow to form vortex in the grit chamber, a motor and a gearbox for driving the spiral blades to rotate are not required to be additionally arranged, and the spiral blades are vertically and spirally downward, so that secondary vortex is not easy to form in a sand collecting area, and sand deposited in the sand collecting area is rolled up.
(2) The spiral-flow grit chamber for town sewage provided by the invention adopts the spiral blades with the spread lengths which are sequentially reduced from top to bottom, so that the sand-containing sewage forms a vortex from the separation area to the upper part of the sand collection area in the chamber body, and organic matters on the sand are continuously washed away by water flow in the sedimentation process, thereby achieving better separation of the organic matters from sand.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1-separation zone, 11-water inlet, 12-water outlet, 2-sand collection zone, 3-sand collection platform, 4-tank cover, 5-mixing drum, 51-helical blade, 6-air stripping device, 61-three-phase separator, 62-air stripping pipe, 63-air inlet pipe, 7-guide plate, 8-blow-down pipe, 9-water inlet channel.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
As shown in fig. 1, a rotational flow grit chamber for town sewage, includes a cylindrical chamber body, the chamber body is divided into a separation region 1 and a sand collection region 2 from top to bottom, the separation region 1 and the sand collection region 2 are connected by a sand collection platform 3 extending along the circumferential direction of the chamber body axis, and includes a chamber cover 4 arranged on the chamber body, a mixing drum 5 vertically arranged in the chamber body and a gas stripping device 6;
the upper end of the mixing drum 5 is rotatably connected with the lower part of the tank cover 4, and the side wall of one end of the mixing drum 5 far away from the tank cover 4 is provided with a helical blade 51 which extends downwards along the outer side wall of the mixing drum 5 in a helical manner;
the stripping device 6 comprises a three-phase separator 61, a stripping pipe 62 and an air inlet pipe 63 communicated with the stripping pipe 62; the three-phase separator 61 is arranged on the tank cover 4, one end of the gas stripping pipe 62 is connected with the three-phase separator 61, one end of the gas stripping pipe 62 far away from the three-phase separator 61 penetrates through the tank cover 4 and extends vertically downwards along the stirring cylinder 5 to the lower part of the sand collecting area 2, and the communicating part of the gas inlet pipe 63 and the gas stripping pipe 62 is close to one end of the gas stripping pipe 62 far away from the three-phase separator 61;
a water inlet 11 and a water outlet 12 are arranged on the sorting area 1, and the direction of water flow formed by the water inlet 11 is horizontally tangent to the edge of a blade of the propeller; the water inlet 11 is arranged at one end of the separation area 1 close to the tank cover 4.
The axes of the separation area 1 and the sand collection area 2 are on the same straight line, and the radial size of the separation area 1 is larger than that of the sand collection area 2. The tank body is fixedly provided with a tank cover 4 for installing a mixing drum 5 and a three-phase separator 61.
The air inlet pipe 63 and the air stripping pipe 62 are both arranged in the mixing drum 5, extend out of the mixing drum 5 along the mixing drum 5 and extend to the lower part of the sand collection area 2; the spreading length of the helical blade 51 is larger than the radius of the sand collecting area 2 but smaller than the radius of the sorting area 1, that is, the helical blade 51 extends to the sand collecting platform 3, and when the helical blade 51 rotates, sand deposited on the sand collecting platform 3 can be disturbed, so that the sand is deposited towards the sand collecting area 2.
The air inlet pipe 63 is externally connected with an air pump, and air is filled into the air stripping pipe 62, so that air stripping of the sand-water mixture is realized. And (3) after the sand-water mixture is stripped into the three-phase separator 61, carrying out gas-solid-liquid three-phase separation to obtain sand, and discharging the sand through a sand discharge pipe connected with the three-phase separator 61.
Example 2
The embodiment is improved on the basis of embodiment 1, and the improvement is as follows: the span length of the helical blade 51 decreases from top to bottom. The helical blades 51 extend from the sorting zone 1 to the sand catchment zone 2. The length of the spiral blade 51 near the end of the pool cover 4 is between the radius of the sorting area 1 and the radius of the sand collecting area 2, and the length of the spiral blade 51 near the bottom of the sand collecting area 2 gradually tends to zero. The helical blades 51 which are sequentially reduced from top to bottom enable the sand-containing sewage to form a vortex from the separation area 1 to the upper part of the sand collecting area 2 in the tank body, so that organic matters on sand and stones are continuously washed away by water flow in the sedimentation process, and better separation of the organic matters from the sand and stones is achieved.
Other parts in this embodiment are substantially the same as those in embodiment 1, and thus are not described in detail.
Example 3
The embodiment is improved on the basis of the embodiment 2, and the improvement is as follows: the water inlet 11 comprises a plurality of water inlet pipe orifices which are circumferentially and uniformly distributed on the side wall of the separation area 1, and the water inlet flow direction of each water inlet pipe orifice is horizontally tangent to the edge of the helical blade 51. The water flow direction of each water inlet pipe opening is clockwise or anticlockwise, the spiral blades 51 are pushed by multiple points to rotate clockwise or anticlockwise to form vortex, meanwhile, the vortex drives the water flow to rotate clockwise or anticlockwise, and the spiral blades 51 can be further pushed to rotate, so that the rotating speed of the spiral blades 51 reaches the optimal sand removing rotating speed.
Preferably, the water inlet 11 comprises three water inlet nozzles arranged in an equilateral triangle, and multi-point water inlet is realized.
The sand collecting platform 3 is an annular inclined platform which inclines downwards, so that sand deposited on the sand collecting platform 3 can slide down to the sand collecting area 2 under the action of gravity along with water flow, the sand is not easy to deposit on the sand collecting platform 3, and a good sand collecting effect is achieved.
Preferably, the angle between the sand collecting platform 3 and the horizontal plane is 12 +/-1.5 degrees.
Other parts in this embodiment are substantially the same as those in embodiment 2, and thus are not described in detail.
Example 4
The embodiment is improved on the basis of any one of the embodiments 1 to 3, and the improvement is as follows: the side wall of the gas stripping pipe 62 close to the bottom surface of the sand collecting area 2 is provided with a guide plate 7 which inclines downwards. The flow guide plate 7 extends obliquely from the middle of the sand collecting area 2 to the side wall of the sand collecting area 2, but a gap is formed between the flow guide plate 7 and the side wall of the sand collecting area 2, so that sand can be deposited on the bottom surface of the sand collecting area 2 from the gap.
Due to the vortex action, the sand deposited in the sand collecting area 2 is gathered towards the middle of the bottom surface of the sand collecting area 2, so that the air stripping pipe 62 is easily blocked, and the sand is not easy to discharge. The guide plate 7 that inclines makes sedimentary grit scatter around the gas stripping pipe 62, is difficult for blockking up gas stripping pipe 62, makes the grit chamber continuously work, reduces and overhauls number of times and interval time.
Preferably, the angle between the guide plate 7 and the stripping pipe 62 is 30-45 degrees. The gap between one end of the deflector 7 far away from the gas stripping pipe 62 and the side wall of the sand collecting area 2 is not less than 1/2 of the radius of the sand collecting area 2.
Other parts in this embodiment are substantially the same as those in any of embodiments 1 to 3, and thus are not described in detail.
Example 5
The embodiment is improved on the basis of any one of embodiments 1 to 4, and the improvement is as follows: the side wall of the sand collection area 2 close to the bottom surface is provided with a vent pipe 8 extending to the lower part of the air lifting pipe 62, and the vent pipe 8 is externally connected with an air pump or a sand lifting pump. When the gas stripping pipe 62 is blocked by sand, the air release pipe 8 can be filled with gas to disturb the sand blocking the gas stripping pipe 62 or the air release pipe 8 can be used for pumping out the sand blocking the gas stripping pipe 62, so that the smoothness of the gas stripping pipe 62 can be recovered, the sand basin is not required to be stopped and drained for overhauling, and the overhauling cost of the sand basin is reduced.
Other parts in this embodiment are substantially the same as any of embodiments 1 to 4, and thus are not described in detail.
Example 6
The embodiment is improved on the basis of any one of the embodiments 1 to 5, and the improvement is as follows: the rotational flow grit chamber still includes the inlet channel 9 with water inlet 11 intercommunication, inlet channel 9 slope sets up outside the cell body downwards, increases the velocity of flow and the impact force of water inlet 11. The water inlet pipe orifice is arranged obliquely downwards, so that water flow formed by the water inlet 11 is inclined downwards, and the spiral blade 51 is better pushed to rotate.
Other parts in this embodiment are substantially the same as those in any of embodiments 1 to 5, and thus are not described in detail.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
1. The utility model provides a whirl grit chamber for town sewage, includes the cell body of cylinder, cell body from the top down divide into sorting region (1), collection sand district (2) in proper order, sorting region (1) and collection sand district (2) are connected through collection sand platform (3) along cell body axis circumference extension, its characterized in that: comprises a tank cover (4) arranged on a tank body, a mixing drum (5) vertically arranged in the tank body and an air stripping device (6);
the upper end of the mixing drum (5) is rotatably connected with the lower part of the tank cover (4), and the side wall of one end of the mixing drum (5) far away from the tank cover (4) is provided with a helical blade (51) which extends spirally downwards along the outer side wall of the mixing drum (5);
the gas stripping device (6) comprises a three-phase separator (61), a gas stripping pipe (62) and a gas inlet pipe (63) communicated with the gas stripping pipe (62); the three-phase separator (61) is arranged on the tank cover (4), one end of the gas stripping pipe (62) is connected with the three-phase separator (61), one end, far away from the three-phase separator (61), of the gas stripping pipe (62) penetrates through the tank cover (4) and extends vertically downwards to the lower part of the sand collection area (2) along the inner part of the stirring cylinder (5), and the communicating part of the gas inlet pipe (63) and the gas stripping pipe (62) is close to one end, far away from the three-phase separator (61), of the gas stripping pipe (62);
a water inlet (11) and a water outlet (12) are formed in the sorting area (1), and the direction of water flow formed by the water inlet (11) is horizontally tangent to the edge of a blade of the propeller; the water inlet (11) is arranged at one end of the separation area (1) close to the pool cover (4).
2. The rotational flow grit chamber for urban sewage according to claim 1, characterized in that: the spread length of the helical blade (51) is reduced from top to bottom.
3. The rotational flow grit chamber for urban sewage according to claim 1, characterized in that: the water inlet (11) comprises a plurality of water inlet pipe orifices which are circumferentially and uniformly distributed on the side wall of the sorting area (1), and the water inlet flow direction of each water inlet pipe orifice is horizontally tangent to the edge of the helical blade (51).
4. The rotational flow grit chamber for urban sewage according to claim 1, characterized in that: the sand collecting platform (3) is an annular inclined platform which inclines downwards.
5. The rotational flow grit chamber for urban sewage according to claim 4, characterized in that: the angle between the sand collecting platform (3) and the horizontal plane is 12 +/-1.5 degrees.
6. A rotational flow grit chamber for urban sewage according to any of claims 1 to 5, characterized in that the side wall of the gas stripping pipe (62) close to the bottom of the sand-collecting area (2) is provided with a flow guide plate (7) which inclines downwards.
7. The rotational flow grit chamber for urban sewage according to claim 6, characterized in that: the angle between the guide plate (7) and the air stripping pipe (62) is 30-45 degrees.
8. The rotational flow grit chamber for urban sewage according to any one of claims 1 to 5, characterized in that: the side wall of the sand collection area (2) close to the bottom surface is provided with a vent pipe (8) extending to the lower part of the air lifting pipe (62), and the vent pipe (8) is externally connected with an air pump or a sand lifting pump.
9. The rotational flow grit chamber for urban sewage according to any one of claims 1 to 5, characterized in that: the water-saving device is characterized by further comprising a water inlet channel (9) communicated with the water inlet (11), wherein the water inlet channel (9) is obliquely and downwards arranged outside the pool body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911303320.3A CN110917676A (en) | 2019-12-17 | 2019-12-17 | A whirl grit chamber for town sewage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911303320.3A CN110917676A (en) | 2019-12-17 | 2019-12-17 | A whirl grit chamber for town sewage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111677089A (en) * | 2020-06-10 | 2020-09-18 | 广东创亨建设有限公司 | Efficient municipal drainage system |
| CN112127464A (en) * | 2020-09-22 | 2020-12-25 | 江苏瑞澜给排水成套设备有限公司 | High-order cistern of water conservancy system gate-type rinse-system |
| CN113617074A (en) * | 2021-08-13 | 2021-11-09 | 漳州市中茂环境工程有限公司 | High-efficient aeration grit chamber with scrape sediment function |
| CN116947159A (en) * | 2023-09-20 | 2023-10-27 | 山西绿景环保科技工程有限公司 | Efficient sand-water separation equipment |
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| CN112127464A (en) * | 2020-09-22 | 2020-12-25 | 江苏瑞澜给排水成套设备有限公司 | High-order cistern of water conservancy system gate-type rinse-system |
| CN112127464B (en) * | 2020-09-22 | 2022-02-08 | 江苏瑞澜给排水成套设备有限公司 | High-order cistern of water conservancy system gate-type rinse-system |
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