CN115845485A - Horizontal circulation filter pool - Google Patents

Abstract

The invention discloses a horizontal circulation filter tank, which comprises: a main body with a hollow structure inside and a sewage water inlet and a clear water port; a filter assembly is arranged in the body and is suitable for filtering the water flowing through it; the filter assembly It is arranged upstream of the clear water port; the circulation filter area is connected with the sewage water inlet and is located upstream of the filter assembly, and the circulation filter area at least includes a horizontal sweeping layer in contact with the filter assembly. The water body in the horizontal sweeping layer has at least a horizontal tangential component force when flowing through the filter assembly, which is suitable for moving the pollutants located at the upper part of the filter assembly from the upstream side of the horizontal sweeping layer along the The top wall is scoured to the downstream side of the horizontal sweep layer. The invention can wash away the pollutants located on the upper part of the filter assembly, preventing them from prematurely accumulating on the surface of the filter assembly, prolonging the cleaning period of the horizontal circulation filter tank, reducing the cleaning frequency and saving energy consumption.

Description

Horizontal circulation filter

technical field

The invention relates to the technical field of horizontal circulation filters, in particular to a horizontal circulation filter.

Background technique

In the horizontal circulation filter, quartz sand is often used as the material for sewage filtration. Quartz sand filtration uses quartz sand as the filter medium. Under a certain pressure, the water with high turbidity is filtered through a certain thickness of granular or non-granular quartz sand to effectively intercept and remove suspended solids, organic matter, and colloidal particles in the water. , microorganisms and some heavy metal ions, etc., and finally achieve the effect of reducing water turbidity and purifying water quality.

In the horizontal circulation filter in the prior art, the sewage is filtered from top to bottom in the sewage treatment process. At this time, the sewage above the filter layer will continuously impact the filter layer while passing through the filter layer. Along the height direction, the upper filter layer will be blocked first by the pollutants in the sewage, and as the filtration operation continues, the area of the filter layer that is blocked from top to bottom will continue to increase. In order to ensure the filtration efficiency of the filter layer, it is usually necessary to perform frequent backwashing operations on the filter layer to achieve purification of the filter layer.

In order to solve the above problems, a horizontal circulation filter is disclosed in the prior art. An upper swirl zone and a lower swirl zone can be formed at the upper and lower ends of the filter layer respectively. In the upper swirl zone and the lower swirl zone, The sewage rotates and flows on an approximately horizontal plane. Then it enters the filter layer upward or downward, and after being washed by the filter layer, clear water is formed from the filter layer and discharged.

Usually the above-mentioned setting method, because the sewage rotates continuously in a ring on the surface of the filter layer, compared with the conventional method of vertically entering the filter layer, the horizontally flowing sewage will wash away the pollutants on the surface of the filter layer, making the sewage The material will not enter the filter layer prematurely and block the filter layer. However, in the above structure, since the sewage itself is still continuously reciprocating in the horizontal area, during the rotation process, the pollutants on the surface of the filter layer will circulate in a limited space, and the total amount will continue to increase. When it reaches a certain amount, deposition will still occur, and at this time, the filter layer on one side will still be blocked, thereby affecting the subsequent sewage purification operation.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the defects in the horizontal circulation filter in the prior art that the sewage flows in a circular shape in the horizontal area, which easily pollutes the filter layer and affects the purification operation.

For this reason, the embodiment of the present invention provides a kind of horizontal circulation filter, and this horizontal circulation filter comprises:

The main body has a hollow structure inside, with a sewage inlet and a clean water inlet;

A filter assembly is arranged in the body and is suitable for filtering the water passing through, and the filter assembly is arranged upstream of the clear water port;

The circulation filter area communicates with the sewage water inlet and is located upstream of the filter assembly, the circulation filter area at least includes a horizontal sweeping layer in contact with the filter assembly, and the water body in the horizontal sweeping layer is in the There is at least a horizontal tangential component when flowing through the filter assembly, which is suitable for washing the pollutants at the upper position of the filter assembly from the upstream side of the horizontal sweeping layer along the top wall of the filtering assembly to the horizontal sweeping layer downstream side.

Optionally, along the transport direction of the water body, the circulating filter area also includes an interconnected ascending area, a slow-flowing area and a descending area:

The horizontal sweeping layer, the ascending zone, the slow-flowing zone and the descending zone are sequentially connected;

The water inlet of the circulating filter area is set on the upstream side of the horizontal sweeping layer, and the inflowing water body can flow through the horizontal sweeping layer, ascending zone, slow flow zone and descending zone in sequence, so as to realize the circulation of the water body inside the circulating filtering zone , suitable for separating pollutants in water bodies.

Optionally, a diversion structure is provided in the rising area, and the diversion structure includes:

The deflector is arranged in the rising area and forms a guiding channel between the side wall of the rising area, and the guiding channel is suitable for upwardly guiding the water body.

Optionally, the body also has a backwash water outlet, and the backwash water outlet communicates with the circulation filter area. During backwash, the water body can flow through the filter assembly and the circulation filter area in sequence, and pass through The backwash water outlet is discharged out of the body.

Optionally, the diversion structure also includes:

The first sand baffle is connected to the bottom side of the deflector, and the lower end of the first sand baffle extends toward the side wall of the body; and/or, the flow guide structure further includes:

The second sand baffle is connected to the top side of the deflector, and the top end of the second sand baffle extends toward the center of the body.

Optionally, the horizontal circulation filter also includes:

The clean water area is located downstream of the filter assembly and communicates with the clean water port, and is suitable for collecting and discharging the water filtered by the filter assembly.

Optionally, the clear water area includes:

The first clear water area is suitable for collecting water filtered by the filter assembly;

The second clean water zone is located downstream of the first clean water zone and communicates with both the first clean water zone and the clean water outlet, and the second clean water zone is set higher than the circulation filter zone;

In the filtering state, the filtered water can pass through the first clear water area and the second clear water area, and be discharged from the clear water port; in the backwashing state, the water body in the second clear water area is suitable for self Under the action of gravity, it flows through the first clean water zone, the filter assembly and the circulation filter zone in sequence, and is discharged out of the body through the backwash water outlet.

Optionally, the horizontal circulation filter also includes:

The backwash water distribution pipe is arranged in the clean water area and corresponding to the filter assembly, and is suitable for providing backwash water to the filter assembly.

Optionally, there are multiple circulation filter areas, and the multiple circulation filter areas are distributed in the body in a ring shape, and the backwash water distribution pipe is arranged in the center of the body and connected to the body. The circulating filter areas are connected.

Optionally, the horizontal circulation filter also includes:

The coagulation zone communicates with the sewage water inlet and is located upstream of the circulation filter zone, and is suitable for coagulation treatment of the incoming water body.

Optionally, a plurality of spoilers are arranged at intervals on the side wall of the coagulation zone, and the spoilers divide the coagulation zone into a plurality of interconnected compartments, and the water body flows through the coagulation zone. The spoiler can hit the spoiler at the same time, which is suitable for mixing the water body and the medicine when adding the medicine in the coagulation area.

The technical solution of the present invention has the following advantages:

1. In the present invention, the sewage enters the circulation filter area inside the body from the sewage water inlet. Since the water body in the horizontal sweeping layer on the upper part of the filter assembly has a horizontal tangential force, the pollutants located at the upper part of the filter assembly can be removed from the horizontal The upstream side of the sweeping layer scours along the top wall of the filter assembly to the downstream side without prematurely accumulating on the surface of the filter assembly, which can prolong the cleaning cycle of the horizontal circulation filter, reduce cleaning frequency and save energy consumption. At the same time, part of the water in the horizontal sweeping layer penetrates into the filter assembly for filtration under the action of gravity. Since the horizontal sweeping layer sweeps the sewage horizontally, the filtration period can be extended, and the clear water produced by filtration can be of better quality and more continuous. Good, large water production.

In addition, since the filtration period is extended, the requirements for the filter assembly itself are also reduced. At this time, the filter assembly itself can complete the long-term purification operation without setting too deep. This helps to control the volume of the entire device, helps control costs and reduces construction difficulty.

2. When the horizontal circulation filter in the present invention is filtering the sewage, the pollutants in the sewage can continuously participate in the circulating flow in the circulation filter area. By setting the circulation filter area, the dirt-holding space on the upper part of the filter assembly can be increased, Improve the dirt-holding capacity of the horizontal circulation filter.

3. The setting of the diversion channel in the present invention can play a guiding role in the upward flow of the water body and avoid short flow in the rising process of the water body.

4. In the present invention, by backwashing the horizontal circulation filter, the water body can flush the pollutants blocked in the filter assembly and the pollutants contained in the circulation filter area together and discharge them out of the body, thereby improving the filtering effect.

5. In the present invention, by setting the first sand baffle, during backwashing, part of the filter material layer flowing into the diversion channel can fall back along the first sand baffle to the filter assembly close to the first filter assembly under the action of its own gravity. One side of the fender. By setting the second sand baffle, the filter material layer that flows into the circulation filter area during backwashing can fall back along the second sand baffle and the diversion channel to the filter assembly near the first sand baffle after backwashing. On one side, prevent all the filter material layers from falling back to the top of the filter assembly, so as to ensure the flatness of the filter material layer and the stability of the filtering effect in the later stage.

6. The first embodiment and the second embodiment of the present invention adopt the self-backwashing method of the equipment, close the sewage water inlet and the clean water inlet in the backwash state, and the water body in the second clean water area flows sequentially under the action of its own gravity. After passing through the first clear water area, filter assembly and circulation filter area, backwash the filter assembly and circulation filter area, and hydraulically scrub the pollutants blocked in the filter assembly to expand the filter material layer; at the same time, the filter assembly and the circulation filter area The pollutants are discharged from the body. The self-backwashing method can backwash the equipment without additional hydraulic lifting devices, which can reduce equipment investment costs and save energy consumption.

7. In the present invention, a coagulation zone is set upstream of the circulation filter zone. In the case of micro-pollution in the water body, chemicals can be added in the coagulation zone, and the sewage can hit the spoiler when it flows through the coagulation zone, thereby interacting with the coagulation zone. The medicine is fully mixed; when dosing is not required, the coagulation area can be used as a larger water distribution tank for uniform water intake.

8. The horizontal circulation filter of the third embodiment and the fourth embodiment of the present invention adopts the backwashing method of external pressure. When backwashing, the hydraulic lifting device, such as a water pump, is used to push the water into the backwashing distribution pipe. External clean water, backwash distribution pipe distributes water to the clean water area, and flows through the filter assembly and circulation filter area in order to achieve backwash.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is a schematic structural view of a horizontal circulation filter in a first embodiment of the present invention;

Fig. 2 is the top view of the horizontal circulation filter tank in Fig. 1;

Fig. 3 is a schematic structural view of a horizontal circulation filter in a second embodiment of the present invention;

Fig. 4 is a schematic structural view of a horizontal circulation filter in a third embodiment of the present invention;

Fig. 5 is a schematic structural view of a horizontal circulation filter in a fourth embodiment of the present invention;

Fig. 6 is a schematic structural view of a horizontal circulation filter in a fifth embodiment of the present invention;

Fig. 7 is a schematic structural view of a horizontal circulation filter in the sixth embodiment of the present invention.

Explanation of reference signs:

1. Body; 11. Sewage water inlet; 12. Clean water outlet; 13. Backwash water outlet;

2. Filter assembly; 21. Filter material layer; 22. Filter cap;

3. Circulation filter area; 31. Horizontal sweeping layer; 32. Rise area; 33. Slow flow area; 34. Fall area; 351. First chamfered plate; 352. Second chamfered plate; 353. Third chamfered plate gusset;

4. diversion structure; 41. deflector; 411. diversion channel; 42. first sand retaining plate; 43. second sand retaining plate;

5. Clear water area; 51. First clear water area; 52. Second clear water area; 53. Clear water connecting pipe;

61. Backwash cloth water pipe; 62. Backwash drainage tank;

7. Coagulation area; 71. Spoiler.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

Example 1

As shown in Figures 1 to 2, the embodiment of the present invention provides a horizontal circulation filter, which includes a body 1, a filter assembly 2 and a circulation filter area 3, specifically, the body 1 has a hollow structure inside, It has a sewage water inlet 11 and a clean water port 12. The sewage is passed into the body 1 from the sewage water inlet 11, and the clean water obtained by the filter assembly 2 is discharged to the outside of the body 1 through the clean water port 12; the filter assembly 2 is arranged in the body 1, suitable for To filter the passing water, the filter assembly 2 is arranged upstream of the clear water inlet 12; the circulation filter area 3 is connected to the sewage water inlet 11, and the circulation filter area 3 is located at the upstream of the filter assembly 2, and the circulation filter area 3 includes at least the filter assembly 2. The horizontal sweeping layer 31 in contact, the water body of the horizontal sweeping layer 31 has at least a horizontal tangential component force when flowing through the filter assembly 2, which is suitable for removing the pollutants located at the upper part of the filter assembly 2 from the horizontal sweeping layer 31 The upstream side is flushed along the top wall of the filter assembly 2 to the downstream side of the horizontal sweeping layer 31 .

As shown by the arrow in Figure 1, the upstream side of the horizontal sweeping layer 31 is located at the outer position away from the central area in the body, and the downstream side of the horizontal sweeping layer 31 is located at the central area of the body. As the filtering operation proceeds, the pollutants will Continuous flow from the outer locations to the central region and deposition near the central region.

In this way, the sewage enters the circulation filter area 3 inside the body 1 from the sewage water inlet 11. Since the water body in the horizontal sweeping layer 31 on the upper part of the filter assembly 2 has a horizontal tangential force, the pollution located at the upper part of the filter assembly 2 can be removed. The matter is washed from the upstream side of the horizontal sweeping layer 31 to the downstream side along the top wall of the filter assembly 2, without prematurely accumulating on the surface of the filter assembly 2, which can prolong the cleaning period of the horizontal circulation filter tank, reduce the cleaning frequency, Save energy. At the same time, part of the water body in the horizontal sweeping layer 31 infiltrates into the filter assembly 2 to filter under the action of gravity. Since the horizontal sweeping layer 31 sweeps the sewage horizontally, the filtration period can be extended, and the quality of clear water produced by filtration is better. Better continuity and larger water production.

Optionally, the body 1 of the horizontal circulation filter in this embodiment can be made of metal material, or a pool body made of concrete structure, or other materials, which is not limited in this embodiment ; Preferably, the body 1 is made of steel structure. Optionally, sewage enters the body 1 through gravity flow or pressure flow for filtration.

Optionally, the filter assembly 2 includes a filter material layer 21 . Optionally, the filter material layer 21 is quartz sand or other filter materials. Optionally, the filter assembly 2 further includes a filter cap 22 arranged at the bottom of the filter material layer 21 .

Optionally, along the transport direction of the water body, the circulating filter area 3 also includes an ascending area 32, a slow-flow area 33 and a descending area 34 connected to each other: a horizontal sweeping layer 31, an ascending area 32, a slow-flowing area 33 and a descending area 34 Connected in sequence; the water inlet of the circulation filter area 3 is set on the upstream side of the horizontal sweeping layer 31, and the inflowing water body can flow through the horizontal sweeping layer 31, the rising area 32, the slow flow area 33 and the descending area 34 in sequence, realizing the water body The circulation inside the circulation filtration zone 3 is suitable for separating pollutants in the water body.

When the horizontal circulation filter in this embodiment is filtering the sewage, the pollutants in the sewage can continuously participate in the circulation flow in the circulation filter area 3, and by setting the circulation filter area 3, the dirt holding capacity of the upper part of the filter assembly 2 can be increased space and improve the dirt-holding capacity of the horizontal circulation filter.

The water inlet of the circulation filter area 3 faces the center of the body 1, and the water inlet of the circulation filter area 3 is smaller than the water inlet of the body 1, so that the sewage flows into the circulation filter area 3 at a high speed in a manner approximately parallel to the upper surface of the filter assembly 2, so that Form a horizontal sweeping layer 31; according to Bernoulli's principle, when the water body in the descending area 34 of the circulation filter area 3 falls into the upstream side of the horizontal sweeping layer 31, due to the effect of the pressure difference, the water body remains in the same direction as the water intake , that is, keep consistent with the flow direction of the water body in the horizontal sweeping layer 31 . Optionally, the lower end of the side wall of the rising area 32 is set close to the downstream side of the horizontal sweeping layer 31, and is connected with the filter assembly 2 to form a first chamfered plate 351. The first chamfered plate 351 has a slope facing upwards, enabling When the water body flows through the downstream side of the horizontal sweeping layer 31 , it flows toward the rising area 32 along the slope on the first chamfered plate 351 . Optionally, the upper end of the side wall of the rising area 32 is obliquely provided with a second chamfering plate 352, and the upper end of the side wall of the descending area 34 is obliquely provided with a third chamfering plate 353, so that the water body can smoothly flow from the ascending area 32 to the slow flow. zone 33, and flows from the slow flow zone 33 to the descending zone 34, so that the water body forms an annular flow inside the circulation filter zone 3.

It should be noted that the slow flow zone 33 in this embodiment refers to: the water body flowing upward in the rising zone 32 is relatively slowed down due to its own gravity, and the water body passes through the second chamfered plate on the side wall of the rising zone 32 After 352, it changes direction and flows to the upstream side of the descending zone 34, and the area between the downstream side of the ascending zone 32 and the upstream side of the descending zone 34 is the slow flow zone 33.

Optionally, a flow guiding structure 4 is arranged in the rising area 32, and the flow guiding structure 4 includes a flow guiding plate 41, and the flow guiding plate 41 is arranged in the rising area 32 and forms a flow guiding channel 411 between the side walls of the rising area 32 , the diversion channel 411 is suitable for upward diversion of the water body. The setting of the diversion channel 411 can play a guiding role in the upward flow of the water body, so as to avoid short flow in the rising process of the water body.

As the filtration time elapses, the concentration of pollutants in the circulation filter area 3 is getting higher and higher; in addition, after long-term filtration operation, the filtering effect is reduced due to the blockage of pollutants in the filter assembly 2 . Therefore, it is necessary to clean the horizontal circulation filter, and the commonly used cleaning method is to backwash the equipment.

Optionally, the body 1 also has a backwash water outlet 13, and the backwash water outlet 13 communicates with the circulation filter area 3. During backwashing, the water body can flow through the filter assembly 2 and the circulation filter area 3 in sequence, and pass through the backwash The water outlet 13 is discharged out of the body 1 . By backwashing the horizontal circulation filter, the water body can flush the pollutants blocked in the filter assembly 2 and the pollutants contained in the circulation filter area 3 together and discharge them out of the body 1, thereby improving the filtering effect.

Compared with the conventional design, this embodiment adopts the filtering method of horizontal sweeping flow. Since the filtering cycle is extended, the requirements for the filter assembly 2 itself are also reduced, and the required thickness of the filter material layer 21 can be reduced. Because the filter material layer 21 The reduction in thickness can reduce the height of the body 1, thereby reducing the investment cost; at the same time, due to the reduction in the thickness of the filter material layer 21, the amount of backwash water can be reduced, the backwash duration is short, and energy consumption is saved.

Optionally, the flow guide structure 4 further includes a first sand baffle 42 , the upper end of the first sand baffle 42 is connected to the bottom side of the flow guide 41 , and the lower end extends toward the side wall of the body 1 . By setting the first sand baffle 42, during backwashing, part of the filter material layer 21 flowing into the diversion channel 411 can fall back along the first sand baffle 42 to the inside of the filter assembly 2 under the action of its own gravity. One side of the fender 42.

Optionally, the flow guide structure 4 further includes a second sand baffle 43 , the lower end of the second sand baffle 43 is connected to the top side of the flow guide 41 , and the top end extends toward the center of the body 1 . By setting the second sand baffle 43, the filter material layer 21 that flows into the circulation filter area 3 during backwashing can fall back into the filter assembly 2 along the second sand baffle 43 and the guide channel 411 after the backwashing is completed. One side of the first sand baffle 42 prevents all the filter material layer 21 from falling back directly above the filter assembly 2, thereby ensuring the flatness of the filter material layer 21 and the stability of the later filtering effect.

Optionally, the horizontal circulation filter further includes a clean water area 5, which is located downstream of the filter assembly 2 and communicates with the clean water port 12, and is suitable for collecting and discharging the water filtered by the filter assembly 2. Optionally, the backwash water obtained after backwashing is discharged into other horizontal circulation filter tanks for filtration treatment.

In this embodiment, optionally, the clear water area 5 includes a first clear water area 51 and a second clear water area 52, the first clear water area 51 is suitable for collecting water filtered by the filter assembly 2; the second clear water area 52 is located at the first The downstream of the clear water area 51 is connected with the first clear water area 51 and the clear water outlet 12, and the second clear water area 52 is arranged higher than the circulating filter area 3; under the filtering state, the filtered water can pass through the first clear water area 51 and the second The clear water area 52 is discharged by the clear water port 12; under the backwashing state, the water body in the second clear water area 52 is suitable for flowing through the first clear water area 51, The filter assembly 2 and the circulating filter area 3 are discharged out of the main body 1 through the backwash water outlet 13 .

This embodiment adopts the self-backwashing method of the equipment. In the backwashing state, the sewage water inlet 11 and the clean water port 12 are closed, and the water body in the second clean water area 52 flows through the first clean water area 51, the filter assembly 2 and the water body in sequence under the action of its own gravity. Circular flow filter area 3, with reverse flushing filter assembly 2 and circular flow filter area 3, hydraulic scrubbing is blocked the pollutant in filter assembly 2, makes filter material layer 21 expand; Simultaneously, the Pollutants are discharged out of the body 1 . The self-backwashing method does not require additional hydraulic lifting devices, such as water pumps, to backwash the equipment, which can reduce equipment investment costs and save energy consumption.

Optionally, the horizontal circulation filter further includes a coagulation zone 7, which communicates with the sewage water inlet 11 and is located upstream of the circulation filter zone 3, and is suitable for coagulation treatment of the incoming water. Optionally, a plurality of spoilers 71 are arranged at intervals on the side wall of the coagulation zone 7, and the spoilers 71 divide the coagulation zone 7 into a plurality of interconnected compartments. When the water body flows through the coagulation zone 7 It can hit the spoiler 71 and is suitable for mixing the water body and the medicine when the medicine is added in the coagulation area 7 .

A coagulation zone 7 is arranged upstream of the circulation filter zone 3. When there is micro-pollution in the water body, chemicals can be added in the coagulation zone 7, and the sewage can hit the spoiler 71 when flowing through the coagulation zone 7, thereby interacting with the medicine Fully mixed; when dosing is not required, the coagulation zone 7 can be used as a larger water distribution tank for uniform water intake.

Optionally, the circulation filter area 3 and the filter assembly 2 correspond to form a group of filter units, and the filter units are arranged in multiple groups, and the multiple groups of filter units are disposed in the body 1 in a ring shape. Correspondingly, a plurality of sewage water inlets 11 , clean water inlets 12 and backwash water outlets 13 are correspondingly provided.

Optionally, in this embodiment, there are multiple coagulation zones 7, which are arranged in one-to-one correspondence with the filter units. The coagulation zone 7 is arranged around the periphery of the circulation filter zone 3, and the outer wall and body of the descending zone 34 1 A coagulation zone 7 is formed between the inner walls. Optionally, a horizontal flow channel is formed at the bottom of the coagulation area 7, so that the water inside the coagulation area 7 can flow into the circulation filter area 3 at a high speed in a manner approximately parallel to the upper surface of the filter assembly 2 through the horizontal flow channel. Optionally, a wall plate is correspondingly provided at the bottom ends of two opposite side walls of the coagulation zone 7, and the horizontal circulation channel is formed between the two opposite wall plates.

In this embodiment, there is a preset interval between two adjacent groups of filter units, so that the first clean water area 51 and the second clean water area 52 located on the upper and lower sides of the filter units communicate within the body 1 .

As an embodiment, the clean water area 5 is connected to each circulation filter area 3, so that multiple circulation filter areas 3 can be backwashed at the same time, so as to improve the backwash efficiency of the overall equipment of the horizontal circulation filter.

Optionally, as another embodiment, not shown in the accompanying drawings, two circulating filter areas 3 form a group along the width direction of the body, and there are multiple clear water areas along the length direction of the body 1, and multiple clear water areas 5 and a group of circulating filter areas 3 are set in one-to-one correspondence. In this way, when other circulating filtering areas 3 do not need to be backwashed, a certain group of circulating filtering areas 3 can be backwashed separately without the need for all circulating filtering areas. The filter areas 3 are backwashed at the same time, and when one group of the circulation filter areas 3 is backwashed, it will not affect the filtering operation of the other groups of the circulation filter areas 3 .

In this embodiment, the backwash water outlet 13 communicates with the top wall of the circulation filter area 3 through a pipeline, and water body can be discharged from the body 1 from the circulation filter area 3 through the pipeline during backwashing.

Preferably, the filter units are arranged in four groups uniformly distributed in the body 1 , and four coagulation zones 7 are provided, corresponding to the filter units one by one, and arranged around the periphery of the filter assembly 2 . Of course, the number of groups of filter units can be adjusted according to actual conditions, which is not limited in this embodiment.

Example 2

As shown in Figure 3, and with reference to Figures 1 to 2, the horizontal circulation filter in this embodiment is the same as the rest of the structure of Embodiment 1, the difference is that in this embodiment, the circulation filter area 3 and the filter assembly 2 are formed correspondingly A group of filter units, the filter units are arranged in multiple groups, and the multiple groups of filter units are distributed in the body 1 in a ring shape. One coagulation zone 7 is provided, and multiple groups of filter units are arranged around the periphery of the coagulation zone 7 . Optionally, the outer sidewalls of the plurality of descending zones 34 form the coagulation zone 7 . The sewage water inlet 11 on the body 1 communicates with the water inlet of the coagulation zone 7 through a pipeline.

Optionally, a clean water communication pipe 53 is connected between the first clean water area 51 and the second clean water area 52 , and optionally, the clean water communication pipe 53 is arranged outside the main body 1 . Of course, the clear water communication pipe 53 can also be arranged in the main body 1, which is not limited in this embodiment.

This embodiment can achieve the beneficial effect that Embodiment 1 can achieve, so this embodiment will not repeat it.

Example 3

As shown in Figure 4, and with reference to Figures 1 to 2, the horizontal circulation filter in this embodiment is the same as the rest of the structure of Embodiment 1, the difference is that in this embodiment, the horizontal circulation filter also includes a backwash cloth The water pipe 61 and the backwash water distribution pipe 61 are arranged in the clean water area 5 and correspond to the filter assembly 2, and are suitable for providing backwash water to the filter assembly 2. Optionally, a number of water outlet holes are uniformly arranged on the peripheral wall of the backwash water distribution pipe 61 , which can evenly distribute water to the filter assembly 2 during backwash. Optionally, there are multiple circulating filter areas 3, and multiple circulating filtering areas 3 are disposed in the body 1 in a ring shape, and the backwash water distribution pipe 61 is set at the center of the body 1 position and communicate with the circulation filter area 3.

In the horizontal circulation filter in this embodiment, the clear water area 5 is arranged at the lower part of the body 1. When filtering, the filtered water can be discharged from the clear water area 5 at the lower part of the main body 1 through the clear water port 12; at the same time, this embodiment uses external pressure Backwashing method, when backwashing, through the hydraulic lifting device, such as a water pump, pressurize the external clean water into the backwashing water distribution pipe 61, and the backwashing water distribution pipe 61 distributes water to the clean water area 5, and then flows through the filter assembly 2 and Loop filter zone 3 for backwashing.

Optionally, in this embodiment, the tops of the plurality of circulating filter areas 3 are connected to each other, and the backwashing water distribution pipe 61 is connected to the plurality of circulating filtering areas 3, and the backwashing water distribution pipe 61 can realize the cleaning of multiple circulating filtering areas. 3. Perform backwashing at the same time to improve the backwashing efficiency of the overall equipment of the horizontal circulation filter.

Optionally, a backwash drainage tank 62 is formed between two adjacent circulation filter areas 3, and the backwash drainage tank 62 communicates with the circulation filter area 3 and the backwash water outlet 13, and can collect and discharge the backwashed phase. Adjacent to the backwash water in the two circulation filter areas 3 ; preferably, the backwash drainage tank 62 is formed by the opposite side walls of the two adjacent circulation filter areas 3 . Optionally, the backwash water outlet 13 on the body 1 communicates with the backwash drainage tank 62 through a pipeline. Of course, the backwash water outlet 13 can also be arranged on the top wall or side wall of the main body 1 that communicates with the circulation filter area 3, and those skilled in the art can design according to actual needs, which is not limited in this embodiment .

Other beneficial effects that can be achieved in embodiment 1 or 2 can also be achieved in this embodiment, and details will not be repeated in this embodiment.

Example 4

As shown in Figure 5, and with reference to Figures 1 to 4, the horizontal circulation filter in this embodiment is the same as the rest of the structure of Embodiment 3, the difference is that in this embodiment, multiple groups of filter units are arranged around the coagulation area 7's perimeter. Optionally, the outer sidewalls of the plurality of descending zones 34 form the coagulation zone 7 . The sewage water inlet 11 on the body 1 communicates with the water inlet of the coagulation zone 7 through a pipeline.

Both the present embodiment and the embodiment 3 adopt the backwashing method of external pressure, which can also achieve the beneficial effects achieved by the embodiment 3, so this embodiment will not repeat them.

Example 5

The horizontal circulation filter in this embodiment is the same as the other structures of embodiments 1 to 4, the difference is that the shape of the body 1 can be a cube or a cuboid as shown in Figures 1 to 5, or it can also be as shown in Figure 6 The cylinder shown in this embodiment does not limit the shape of the body 1 .

Example 6

The horizontal circulation filter in this embodiment is the same as the other structures of embodiments 1 to 6, the difference is that, as shown in Figure 7, the water inlet of the coagulation zone 7 is set lower than the water outlet of the coagulation zone 7, and the coagulation zone The water outlet of 7 is set opposite to the upstream side of the horizontal sweeping layer 31, so that the sewage flowing through the coagulation zone 7 is released from the upper water outlet of the coagulation zone 7, and flows into the upstream side of the horizontal sweeping layer 31 to participate in filtration.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom still fall within the scope of protection of the present invention.

Claims (11)

1. A horizontal loop filter comprising:

the body (1) is hollow and is provided with a sewage inlet (11) and a clean water inlet (12);

a filter assembly (2) disposed within the body (1) and adapted to filter a body of water flowing therethrough, the filter assembly (2) being disposed upstream of the clean water port (12);

a circulating filtration zone (3) communicating with said sewage inlet (11) and located upstream of said filtering assembly (2), said circulating filtration zone (3) comprising at least a horizontal scavenging layer (31) in contact with said filtering assembly (2), the body of water of said horizontal scavenging layer (31) having at least a horizontal tangential component when passing through said filtering assembly (2), adapted to flush contaminants located at an upper position of said filtering assembly (2) from an upstream side of said horizontal scavenging layer (31) to a downstream side of said horizontal scavenging layer (31) along a top wall of said filtering assembly (2).

2. A horizontal loop filter according to claim 1, wherein the loop filter zone (3) further comprises, in the direction of transport of the body of water, an ascending zone (32), a slow flow zone (33) and a descending zone (34) in communication with each other:

the horizontal flow sweeping layer (31), the ascending area (32), the slow flow area (33) and the descending area (34) are communicated in sequence;

the water inlet of the circular flow filtering area (3) is arranged at the upstream side of the horizontal flow sweeping layer (31), and inflowing water can sequentially flow through the horizontal flow sweeping layer (31), the ascending area (32), the slow flow area (33) and the descending area (34), so that circular flow of the water inside the circular flow filtering area (3) is realized, and the circular flow filtering area is suitable for separating pollutants in the water.

3. A horizontal circulation filter according to claim 2 wherein a flow directing structure (4) is provided within the rise zone (32), the flow directing structure (4) comprising:

the guide plate (41) is arranged in the ascending area (32) and forms a guide channel (411) with the side wall of the ascending area (32), and the guide channel (411) is suitable for guiding water upwards.

4. A horizontal loop filter according to any one of claims 1 to 3 wherein the body (1) further has a backwash water outlet (13), the backwash water outlet (13) being in communication with the loop filter zone (3) whereby, in reverse flushing, a body of water may flow through the filter assembly (2) and loop filter zone (3) in sequence and be discharged out of the body (1) through the backwash water outlet (13).

5. A horizontal circulation filter according to claim 4 wherein the flow directing structure (4) further comprises:

the first sand baffle (42) is connected with the bottom side of the guide plate (41), and the lower end of the first sand baffle (42) extends towards the direction of the side wall of the body (1); and/or the flow guiding structure (4) further comprises:

and the second sand baffle (43) is connected with the top side of the guide plate (41), and the top end of the second sand baffle (43) extends towards the center direction of the body (1).

6. The horizontal loop filter of claim 5, further comprising:

a clean water zone (5) located downstream of the filtering assembly (2) and communicating with the clean water mouth (12), suitable for collecting and discharging the water bodies filtered by the filtering assembly (2).

7. A horizontal circulation filter according to claim 6 wherein the clean water zone (5) comprises:

-a first clean water zone (51) adapted to collect the bodies of water filtered by said filtering assembly (2);

the second clear water area (52) is positioned at the downstream of the first clear water area (51) and is communicated with the first clear water area (51) and the clear water port (12), and the second clear water area (52) is higher than the circulation filtering area (3);

in the filtering state, the filtered water body can pass through the first clear water area (51) and the second clear water area (52) and is discharged from the clear water port (12); under the backwashing state, the water body of the second clean water area (52) is suitable for flowing through the first clean water area (51), the filtering component (2) and the circular flow filtering area (3) in sequence under the action of self gravity when the sewage inlet (11) and the clean water port (12) are closed, and is discharged out of the body (1) through the backwashing water outlet (13).

8. The horizontal circulation filter of claim 6, further comprising:

and the backwashing water distribution pipe (61) is arranged in the clean water area (5), corresponds to the filtering component (2) and is suitable for providing backwashing water for the filtering component (2).

9. The horizontal loop filter tank as recited in claim 8, wherein a plurality of loop filter zones (3) are provided, the plurality of loop filter zones (3) are annularly distributed in the body (1), and the backwash water distributor (61) is arranged in the center of the body (1) and is communicated with the loop filter zones (3).

10. The horizontal loop filter of any of claims 7-9, further comprising:

and the coagulation area (7) is communicated with the sewage inlet (11), is positioned at the upstream of the circular flow filtering area (3), and is suitable for coagulation treatment of the introduced water body.

11. The horizontal loop filter according to claim 10, wherein a plurality of spoilers (71) are arranged on the side wall of the coagulation zone (7) at intervals, the spoilers (71) divide the coagulation zone (7) into a plurality of interconnected compartments, and the water body can impact the spoilers (71) when flowing through the coagulation zone (7) and is suitable for mixing the water body with the medicament when the coagulation zone (7) is filled with the medicament.

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