CN111298488A - Suspension filtration system convenient to arrange mud - Google Patents
Suspension filtration system convenient to arrange mud Download PDFInfo
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- CN111298488A CN111298488A CN202010221341.7A CN202010221341A CN111298488A CN 111298488 A CN111298488 A CN 111298488A CN 202010221341 A CN202010221341 A CN 202010221341A CN 111298488 A CN111298488 A CN 111298488A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/38—Feed or discharge devices
- B01D24/44—Feed or discharge devices for discharging filter cake, e.g. chutes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
- B01D24/26—Upward filtration
- B01D24/263—Upward filtration the filtering material being supported by pervious surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/38—Feed or discharge devices
- B01D24/40—Feed or discharge devices for feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
- B01D24/4636—Counter-current flushing, e.g. by air with backwash shoes; with nozzles
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a suspension filtering system convenient for sludge discharge, which comprises a water filtering tank communicated with a raw water channel and a back washing system communicated with the water filtering tank, wherein a lower water distribution top plate and an upper filter plate in the water filtering tank divide the water filtering tank into a lower water distribution area, a middle filtering area and an upper clear water storage area, and a filter material is filled in the middle filtering area; the water filtering pond is of a cylindrical structure, the lower part of the water filtering pond is of a frustum-shaped structure extending from the bottom of the cylindrical structure to the center line of the cylindrical structure in an inclined mode, and a water inlet matched with a water supply pipe of an original water channel and a water outlet matched with the backwashing system are formed in the bottom wall of the water filtering pond. The invention has the advantages of ingenious structure, uniform water distribution, effective avoidance of the problem of large difference of thickness of the filter material caused by nonuniform water distribution, uniform thickness of the filter material, guarantee of the filter effect, realization of sludge discharge during backwashing, no need of specially cleaning bottom silt, time saving, clean water saving and further improved filter efficiency.
Description
Technical Field
The invention relates to the field of high-turbidity sewage filtration, in particular to a suspension filtration system convenient for sludge discharge.
Background
In the conventional filtration process, generally, the water to be filtered flows from the upper part of the filter tank to the lower part of the filter material, namely, the forward filtration, and the density of the adopted filter material is higher than that of water, such as the current relatively extensive rapid filter tank, V-shaped filter tank and the like. The existing forward filtering mode generally has the following problems: firstly, in order to ensure the filtering effect, a filtering material with thicker thickness needs to be laid, and when water flows through the filtering material, the loss of a water head is caused; secondly, a large amount of high-quality water sources and power supplies are often consumed during backwashing, so that waste is serious; thirdly, if the water content in the water source to be treated is higher, the water algae can easily block the filter material, the backwashing frequency is increased, the energy consumption is further increased, and the water source is wasted.
In order to solve the problems, the applicant discloses a suspension filtration system (namely CN 103977611A), which comprises a filter tank body and a back-washing system, wherein the filter tank body is of a cuboid structure and is communicated with a water inlet channel, a lower water distribution top plate and an upper filter plate in the filter tank body divide the filter tank body into a raw water distribution area, a filtration area and a clear water storage area, a filter material with the density lower than that of water is adopted in the filtration area, a water source enters the filtration area through the raw water distribution area, and the clear water of the filtered water flows into a filtered water outlet main channel from the clear water storage area. The applicant is for ensuring the backwashing effect of the filter material, and the mounting directions of the side holes at the bottom of the filter head on the upper filter plate are opposite or opposite, so that the disturbance of water flow is increased, the disturbance of the suspended filter material is more severe, and the backwashing efficiency is ensured. The technical scheme utilizes the filter material with density smaller than that of water and a reverse filtering mode from bottom to top to filter raw water, and can also utilize the water head of the water purifier to reversely wash the filter material, thereby improving the filtering efficiency. However, the applicant finds that the technical scheme has the following technical problems in practical operation:
1) the filter body of this technical scheme is the cuboid structure, and the water inlet is located one side of filter body and the backwash pipe is located the opposite side of water inlet, and back flush system can back flush the filter material, washes debris such as silt on the filter material off, but because the filter body is longer, the silt that the back flush got off is difficult to follow the intraductal discharge of back flush, need wash the silt of filter body bottom with a large amount of high-quality water sources regularly, not only extravagant water source, it is consuming time long, influence the normal operating of system.
2) Because the filter body is longer and the water inlet is positioned on one side of the short edge of the filter body, the filter material is pushed to move towards the other side by the transverse thrust generated by the water flow at the water inlet in the rising process of the water body, so that the filter material on one side of the water inlet is thinner and the filter material on the other side is thicker, the thickness distribution of the filter material is extremely uneven, and the filtering effect is not uniform; and because the water inlet is positioned at one side of the filter tank body, the water distribution is not uniform.
3) And in the back washing process, the water level of the filter tank body needs to be concerned in real time, and once the water level is lowered to the middle lower part of the filter area, a smaller filter material falls into the water distribution area below along with the lowering of the water level, so that the loss of the filter material is caused.
Disclosure of Invention
The invention aims to provide the suspension filter system which has a good backwashing effect and is convenient for discharging silt.
In order to achieve the purpose, the invention adopts the following technical scheme:
the suspension filtering system convenient for sludge discharge comprises a water filtering tank communicated with a raw water channel and a back washing system communicated with the water filtering tank, wherein a lower water distribution top plate and an upper filter plate in the water filtering tank divide the water filtering tank into a lower water distribution area, a middle filtering area and an upper clear water storage area, and a filter material is filled in the middle filtering area; the water filtering pond is of a cylindrical structure, the lower part of the water filtering pond is of a frustum-shaped structure extending from the bottom of the cylindrical structure to the center line of the cylindrical structure in an inclined mode, and a water inlet matched with a water supply pipe of an original water channel and a water outlet matched with the backwashing system are formed in the bottom wall of the water filtering pond.
And the water outlet end of the water supply pipe penetrates through the water inlet and extends to the lower water distribution area.
The backwashing system comprises a backwashing discharge pipe and a backwashing disturbance pipeline arranged in the middle filtering area, wherein the water inlet end of the backwashing discharge pipe is hermetically arranged at the water outlet of the water filtering pool, namely the water inlet end of the backwashing discharge pipe is flush with the water outlet, so that sewage after backwashing is smoothly discharged out of the water filtering pool;
the backwash disturbance pipeline comprises a backwash disturbance main pipe and a plurality of backwash disturbance branch pipes, the top of the backwash disturbance main pipe is communicated with the water outlet channel of the water filtering pool, the backwash disturbance branch pipes are communicated with the backwash disturbance main pipe, and a plurality of drain holes are formed in the top of the side wall of each backwash disturbance branch pipe.
The back washing discharge pipe is of a siphon structure, the height of the siphon section of the back washing discharge pipe is consistent with that of the upper surface of the upper filter plate, one end of a siphon damage pipe of the back washing system is communicated with the upper clear water storage area, the other end of the siphon damage pipe is communicated and arranged on the top wall of the siphon part of the back washing discharge pipe, and the heights of two ports of the siphon damage pipe are consistent.
The diapire of drainage pond is the rectangle structure, the water inlet is seted up the middle part of diapire, the outlet symmetry is seted up on the diapire that is located the water inlet both sides.
The filter head mounting holes of the upper filter plate are uniformly distributed at intervals along the circumferential direction, and the directions of the filter head bottom side openings in the adjacent two circles of filter head mounting holes are opposite.
The aperture ratio of the upper filter plate is 5%, and the aperture ratio of the lower water distribution top plate is more than 4%.
The invention has the advantages of ingenious structure, uniform water distribution, effective avoidance of the problem of large difference of thickness of the filter material caused by nonuniform water distribution, uniform thickness of the filter material, guarantee of the filter effect, realization of sludge discharge during backwashing, no need of specially cleaning bottom silt, time saving, clean water saving and further improved filter efficiency. The concrete points are as follows:
1) the water filtering tank is integrally of a cylindrical structure, the water inlet is positioned in the center of the bottom wall, and the lower part of the water filtering tank is of a frustum-shaped structure with a large upper part and a small lower part (namely, the water filtering tank adopts a bottom center water inlet mode), so that water flows uniformly after overflowing from the water inlet pipe around the west, the water level in the water filtering tank stably rises, and uniform water distribution is realized; the stress of the water flow on the plane is uniform, so that the impact of the water flow on the filter material is reduced, the phenomenon that the thickness difference of the filter material is large due to uneven water distribution is effectively avoided, and the filter effect is further ensured.
2) The water outlet direction of the back-washing disturbing pipeline is opposite to the descending direction of the clean water in the filter tank, so that a stronger turbulent flow condition can be formed, the mutual friction among filter materials is increased, and the back-washing effect of the filter materials can be effectively ensured; the backwashing water discharge pipe is processed into a siphon structure, and the vacuum of the backwashing water discharge pipe is broken through the siphon breaking pipe in the backwashing process, so that the water level in the filter tank does not fall when the water level falls to the upper filter plate, the filter material with smaller particles is effectively prevented from falling to the water distribution area due to the over-low water level, and the loss of the filter material is reduced.
3) The unique structural design of the water filtering tank enables the intercepted impurities such as silt to flow into the backwashing discharge pipe along with water flow in the backwashing process, namely, the invention realizes the backwashing and sand discharging treatment of the filter material at the same time, does not need to wash the bottom of the water filtering tank, saves clean water and time, and further improves the filtering efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of a portion C in fig. 1.
Fig. 3 is an enlarged view of a portion D in fig. 1.
Fig. 4 is a layout diagram of the backwash disturbing pipeline according to the present invention.
Fig. 5 is an enlarged view of a portion E in fig. 4.
Fig. 6 is a layout diagram of the filter head side opening direction on the upper filter plate according to the invention.
Fig. 7 is a top view of the lower frustum structure of the water filter tank of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in figure 1, the suspension filtration system convenient for sludge discharge comprises a water filtering tank 1 communicated with a raw water channel and a back washing system communicated with the water filtering tank 1, wherein a lower water distribution top plate 2 and an upper filter plate 3 in the water filtering tank 1 divide the water filtering tank into a lower water distribution area 4.1, a middle filtration area 4.2 and an upper clear water storage area 4.3, a filter material (the filling thickness is about 1m, the diameter of the filter material is 0.9-1.1 mm, the relative density is 1.05, and the apparent density of the beads is 20-60 kg/m3Polystyrene (of course, light zeolite filter material may also be selected)); the water filtering tank 1 is of a cylindrical structure, a circle of overflow weir 5 with a triangular structure is arranged at the upper opening edge of the water filtering tank 1, and F in the figure 1 is the normal water level of the clean water in the upper clear water storage area 4.3; the outer side of the upper opening edge of the water filtering pool 1 is provided with a water outlet channel 6 in an annular structure, and the bottom of the water outlet channel 6 is communicated with a water outlet pipe 7; the lower part of the water filtering pool 1 is a frustum structure which extends from the bottom of the cylindrical structure to the central line in an inclined way, a water inlet and a water outlet matched with a back washing system are arranged on the bottom wall 1.3 of the water filtering pool 1, and the water outlet end of a water supply pipe 8 of the original ditch penetrates through the water inlet to extend to lower water distributionZone 4.1.
As shown in fig. 1-2, the lower water distribution top plate 2 is of a circular structure and horizontally arranged at the top of the frustum-shaped structure of the water filtering tank 1, and the opening rate of the circular truncated cone through holes 2.1 on the lower water distribution top plate 2 is greater than 4% (calculated by the diameter of the lower surfaces of the circular truncated cone through holes 2.1, the diameter of the upper surfaces is 15mm, the diameter of the lower surfaces is 6mm, and the circular truncated cone through holes 2.1 are uniformly distributed), so that the stable rising of the water level is facilitated, and the uneven thickness of the filter material caused by the interference of;
as shown in fig. 1, 3 and 6, an upper filter plate 3 (circular structure) is horizontally arranged in a water filtering tank 1 2m above a lower water distribution top plate 2, six circles of filter head mounting holes are uniformly distributed on the upper filter plate 3, the aperture ratio is 5%, the bottom side aperture directions of filter heads 3.1 in first, third and fifth circles of filter head mounting holes point to the periphery of the upper filter plate 3, the bottom side aperture directions of filter heads 3.1 in second, fourth and sixth circles of filter head mounting holes point to the center of the upper filter plate 3, the side aperture directions of the bottoms of two adjacent circles of filter heads 3.1 during washing are different, the water outlet directions of water flow during backwashing are different, so that a stronger turbulent flow condition is formed, and the mutual friction action between filter materials is increased.
As shown in fig. 1 and 7, the backwashing system comprises four backwashing discharge pipes 9.1 with control valves a and a backwashing disturbance pipeline arranged in the middle filtering area 4.2, the water inlet end of each backwashing discharge pipe 9.1 is hermetically arranged at a water outlet on the bottom wall of the water filtering tank, and the height of the water inlet end of each backwashing discharge pipe 9.1 is consistent with that of the bottom wall, so as to ensure that sewage generated by backwashing is smoothly discharged from the backwashing discharge pipe 9.1;
as shown in fig. 1 and fig. 4-5, the backwash disturbance pipeline includes a backwash disturbance main pipe 9.2 which is in an L-shaped structure and the top of which is communicated with the water outlet channel 6, and a plurality of backwash disturbance branch pipes 9.3 which are communicated with the backwash disturbance main pipe 9.2, the horizontal sections of the backwash disturbance branch pipes 9.3 and the backwash disturbance main pipe 9.2 are located at about 1m below the upper filter plate 3, and the top of the side wall of each backwash disturbance branch pipe 9.3 is provided with a drain hole 9.4.
During the back flushing process, the filtered clean water in the upper clear water storage area 4.3 flows downwards under the action of gravity and flows out of a side opening at the bottom of the filter head 3.1 to wash the filter material downwards; filtered clean water in the water outlet channel 6 flows into the backwash disturbance main pipe 9.2 under the action of gravity, flows out of the drain hole 9.4 at the top of the backwash disturbance branch pipe 9.3 and upwards washes filter materials, the water outlet direction of the backwash disturbance branch pipe 9.3 is opposite to the water flow descending direction in the water filtering tank 1, so that a strong turbulent flow condition is formed, the mutual friction action among suspended filter materials is increased, trapped pollutants are better dropped, and the backwash effect is effectively ensured.
As shown in fig. 1, in order to avoid filter material loss caused by too low water head during backwashing, the height of the siphon section of the backwashing discharge pipe 9.1 is consistent with the height of the upper surface of the upper filter plate 3; the back flushing system also comprises a siphon-breaking pipe 9.5, one end of the siphon-breaking pipe 9.5 is communicated with the upper clear water storage area 4.3, the other end is communicated with the top wall of the siphon part of the back flushing discharge pipe 9.1, and the height of two ports of the siphon-breaking pipe 9.5 is consistent with the height of the upper surface of the upper filter plate 3. During backwashing, once the water level in the water filtering pool 1 drops below the upper filter plate 3, the vacuum in the backwashing discharge pipe 9.1 is destroyed by the backwashing destruction pipe, the water drainage is stopped, the water level in the water filtering pool 1 correspondingly stops dropping, and the filter material loss caused by too low water level is prevented.
During actual construction, in order to facilitate construction and pipe arrangement, the frustum-shaped structure at the lower part of the water filtering pool 1 is formed by building two symmetrical first arc-shaped pieces 1.1 and two symmetrical second arc-shaped pieces 1.2, a bottom wall 1.3 in a rectangular structure is built in a rectangular space surrounded by the bottom edges of the first arc-shaped pieces 1.1 and the second arc-shaped pieces 1.2, the width of the bottom wall 1.3 is about twice of the pipe diameter of a water supply pipe 8, a water inlet is formed in the middle of the bottom wall 1.3, and four water outlets are symmetrically formed in the bottom wall 1.3 at two sides of the water inlet, which is specifically shown in fig. 7.
The working process and principle of the invention are briefly described as follows:
when the water filter works normally (namely normal filtration), the control valve on the water supply pipe 8 is opened, the control valve on the backwashing discharge pipe 9.1 is in a closed state, raw water in the water supply canal enters the water filtering pool 1 from the bottom of the water filtering pool 1 through the water supply pipe 8, the lower part of the water filtering pool 1 is of a frustum structure with a large upper part and a small lower part, and the water outlet end of the water supply pipe 8 is positioned at the central position of the bottom wall 1.3, so that the stable rising of the water level in the water filtering pool 1 can be effectively ensured, and the uniform water; the water level in the water filtering pool 1 rises continuously in the water supply process, then the water is uniformly distributed upwards through the circular truncated cone through holes 2.1 on the lower water distribution top plate 2, the density of the filter material is smaller than that of water, the water flow flowing out of the lower water distribution top plate 2 pushes the filter material to move upwards, so that the filter material is accumulated below the upper filter plate 3 continuously, the water flow rising process is also a process of continuously extruding the filter material, when the water flow passes through the suspended filter material, impurities such as suspended silt and algae in the water are intercepted by the filter material, the filtered clean water enters the upper clear water storage area 4.3 through the filter head 3.1, and when the clean water in the upper clear water storage area 4.3 flows into the water outlet channel 6 through the overflow weir 5 and then is guided into a next purification system through the water outlet pipe 7 at the bottom of the water outlet channel.
Through pilot test, when the hydraulic load is 8m3/m2When h is needed, the sand content of raw water entering the water filtering pool 1 is 680mg/L, the sand content of outlet water filtered by the suspension filtering system is 180mg/L, and the removal rate of silt is 73.5%; when the sand content of raw water entering the water filtering tank 1 is 800mg/L, the sand content of outlet water filtered by the method is 200mg/L, the removal rate of silt is 75%, and the removal rate of silt is high.
The suspension filter system needs to wash filter materials after running for a certain period, and comprises the following specific steps: firstly, closing a control valve B of a water supply pipe 8 to stop water inflow, enabling the filtered normal water level of the clean water in the upper clean water storage area 4.3 to be F, opening a control valve A of a backwashing discharge pipe 9.1, enabling the clean water in the upper clean water storage area 4.3 to flow into a lower middle filtering area 4.2 from a filter head 3.1 under the action of gravity, and enabling the side openings at the bottoms of two adjacent circles of filter heads 3.1 to have different directions so as to disturb the filter material; meanwhile, the clean water in the water outlet channel 6 is sequentially discharged upwards through the back-washing disturbance main pipe 9.2 and the back-washing disturbance branch pipe 9.3, the water outlet direction of the back-washing disturbance branch pipe 9.3 is upward, the water flow direction in the water filtering tank 1 is integrally downward, a strong turbulent flow condition is formed, the mutual friction among filtering materials is greatly increased, the intercepted impurities can better fall off, the intercepted impurities flow into the lower water distribution area 4.1 below along with the water flow through the lower water distribution top plate 2, the filtering tank body corresponding to the lower water distribution area 4.1 is of a frustum-shaped structure with a large upper part and a small lower part, the impurities are smoothly discharged through the back-washing discharge pipe 9.1 along with the water flow, and the difficulty in cleaning the impurities such as silt is reduced; once the water level height in the water filtering pool 1 is lowered to the lower part of the upper filter plate 3, the siphon breaking pipe 9.5 can break the siphon phenomenon of the backwashing discharge pipe 9.1, so that water outlet is stopped, the water level in the water filtering pool 1 also correspondingly stops lowering, small-particle filter materials are effectively prevented from flowing away along with the discharge pipe due to too much water level lowering, and the loss of the filter materials is reduced.
In the description of the present invention, it should be noted that the terms "front", "back", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (7)
1. A suspension filter system convenient for sludge discharge comprises a water filtering tank communicated with a raw water channel and a back washing system communicated with the water filtering tank, wherein a lower water distribution top plate and an upper filter plate in the water filtering tank divide the water filtering tank into a lower water distribution area, a middle filter area and an upper clear water storage area, and a filter material is filled in the middle filter area; the method is characterized in that: the water filtering pond is of a cylindrical structure, the lower part of the water filtering pond is of a frustum-shaped structure extending from the bottom of the cylindrical structure to the center line of the cylindrical structure in an inclined mode, and a water inlet matched with a water supply pipe of an original water channel and a water outlet matched with the backwashing system are formed in the bottom wall of the water filtering pond.
2. The suspended filter system for facilitating sludge discharge of claim 1, wherein: and the water outlet end of the water supply pipe penetrates through the water inlet and extends to the lower water distribution area.
3. The suspended filter system for facilitating sludge discharge of claim 1, wherein: the back-washing system comprises a back-washing discharge pipe and a back-washing disturbance pipeline arranged in the middle filtering area, and the water inlet end of the back-washing discharge pipe is hermetically arranged at the water outlet;
the backwash disturbance pipeline comprises a backwash disturbance main pipe and a plurality of backwash disturbance branch pipes, the top of the backwash disturbance main pipe is communicated with the water outlet channel of the water filtering pool, the backwash disturbance branch pipes are communicated with the backwash disturbance main pipe, and a plurality of drain holes are formed in the top of the side wall of each backwash disturbance branch pipe.
4. The suspended filter system for facilitating sludge discharge of claim 3, wherein: the back washing discharge pipe is of a siphon structure, the height of the siphon section of the back washing discharge pipe is consistent with that of the upper surface of the upper filter plate, one end of a siphon damage pipe of the back washing system is communicated with the upper clear water storage area, the other end of the siphon damage pipe is communicated and arranged on the top wall of the siphon part of the back washing discharge pipe, and the heights of two ports of the siphon damage pipe are consistent.
5. The suspended filter system for facilitating sludge discharge of claim 1, wherein: the diapire of drainage pond is the rectangle structure, the water inlet is seted up the middle part of diapire, the outlet symmetry is seted up on the diapire that is located the water inlet both sides.
6. The suspended filter system for facilitating sludge discharge of claim 1, wherein: the filter head mounting holes of the upper filter plate are uniformly distributed at intervals along the circumferential direction, and the directions of the filter head bottom side openings in the adjacent two circles of filter head mounting holes are opposite.
7. The suspended filter system for facilitating sludge discharge of claim 1, wherein: the aperture ratio of the upper filter plate is 5%, and the aperture ratio of the lower water distribution top plate is more than 4%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010221341.7A CN111298488A (en) | 2020-03-26 | 2020-03-26 | Suspension filtration system convenient to arrange mud |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010221341.7A CN111298488A (en) | 2020-03-26 | 2020-03-26 | Suspension filtration system convenient to arrange mud |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111729357A (en) * | 2020-07-13 | 2020-10-02 | 黄河勘测规划设计研究院有限公司 | Stirring formula suspension filtration system |
| CN111729358A (en) * | 2020-07-13 | 2020-10-02 | 黄河勘测规划设计研究院有限公司 | Hydraulic lifting type suspension filtering system |
| CN113041673A (en) * | 2021-03-25 | 2021-06-29 | 山东水利建设集团有限公司 | Uniform particle filter material water supply system |
| CN115430183A (en) * | 2022-08-30 | 2022-12-06 | 广东科力水务技术股份有限公司 | Accurate water and gas distribution device for filter tank of water plant |
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| CN111729357A (en) * | 2020-07-13 | 2020-10-02 | 黄河勘测规划设计研究院有限公司 | Stirring formula suspension filtration system |
| CN111729358A (en) * | 2020-07-13 | 2020-10-02 | 黄河勘测规划设计研究院有限公司 | Hydraulic lifting type suspension filtering system |
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