CN211836640U - Precipitation filter device - Google Patents

Abstract

The utility model provides a precipitation filtering device, which relates to the technical field of advanced sewage treatment and comprises a communication device and at least two filtering units; the filtering unit comprises container bodies, two adjacent container bodies are arranged in a superposition mode, and the sedimentation filtering devices are subjected to graded and layered treatment to form a vertical treatment system; be provided with first drain and second drain through each vessel, through utilizing a plurality of filter unit to deposit the filtration, arbitrary one deck filter unit's precipitate can be carried through this deck filter unit's first drain and lower floor filter unit's intercommunication device, the second drain via lower floor filter unit discharges, can guarantee the filter unit's of every layer sewage discharge ability, with the sewage discharge ability that can furthest uses the drain, the sewage discharge speed that the drain among the sewage treatment device that exists among the prior art can't satisfy whole equipment has been alleviated, and whole use cost is high technical problem.

Description

Precipitation filter device

Technical Field

The utility model belongs to the technical field of the advanced wastewater treatment technique and specifically relates to a sediment filter equipment is related to.

Background

Along with the continuous improvement of sewage treatment index requirement and throughput, the higher requirement is also continuously put forward to various technical equipment of sewage plants, and the common requirement is as follows: the advanced treatment process of the microorganisms with higher concentration and the solid-liquid separation process equipment matched with the advanced treatment process are more specific, how to realize effective separation of the microorganisms with high concentration and sewage and how to improve the treatment capacity of sewage treatment.

In order to increase the treatment capacity of the sewage treatment equipment in the prior art, the whole sewage treatment equipment is heightened to increase the capacity of the treatment equipment.

However, sewage treatment device among the prior art belongs to a whole equipment, and wherein sewage treatment device's drain generally sets up in the bottom of whole equipment, because sewage treatment device's handling capacity increase, the condition that the drain can't satisfy whole equipment's blowdown speed often can appear, simultaneously, because the excessive use of drain, need irregularly to the inside maintenance of clearing up of sewage treatment device, leads to whole cost to increase.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sediment filter equipment to alleviate the sewage discharge rate that the drain among the sewage treatment device that exists among the prior art can't satisfy whole equipment, and the high technical problem of whole use cost.

The utility model provides a pair of sediment filter equipment, include: the communication device and at least two filtering units;

the filter unit includes the vessel, adjacent two the vessel is the stack and arranges, each the vessel is provided with first drain and second drain, the intercommunication device is located the vessel is originally internal, just the one end of intercommunication device with the second drain is connected, the other end of intercommunication device extends to adjacent in the filter unit, and with adjacent in the filter unit first drain is connected.

In the preferred embodiment of the present invention, the utility model further comprises a spacing support;

the interval support is positioned between any two adjacent filtering units, and two ends of the interval support are respectively abutted to the two filtering units.

In the preferred embodiment of the present invention, an interval groove is provided at one end of the container body close to the first drain outlet, a plurality of interval supports are provided, a plurality of interval supports are located in the interval groove, and the height of the interval supports is greater than or equal to the depth of the interval groove.

In a preferred embodiment of the present invention, the container body is a cylinder, the second drain outlet is located on the sidewall of the container body, and the first drain outlet is located at the end of the container body.

In a preferred embodiment of the present invention, the outer sidewall of the container body is provided with a first connecting portion, and any two adjacent filtering units are connected through the first connecting portion.

In a preferred embodiment of the present invention, the filter unit further includes a filter screen and a support portion;

the supporting part is located the container is originally internal, just the supporting part is located first drain outlet with between the filter screen, the filter screen arrange in on the supporting part, so that precipitate in the filter unit passes through under the effect of gravity the filter screen gets into extremely first drain outlet.

In a preferred embodiment of the present invention, the filtering unit further comprises a fixing retainer ring, a pressing retainer ring and a pressing grid;

the fixed retainer ring extends along the circumferential direction of the inner wall of the container body, the fixed retainer ring is fixedly connected with the inner wall of the container body, the fixed retainer ring and the supporting part are positioned on the same horizontal plane, and the edge of the filter screen close to the inner wall of the container body is arranged on the fixed retainer ring;

the pressing retainer ring is located the fixed retainer ring is kept away from one side of the first sewage discharge port, the pressing retainer ring is arranged along the circumferential extension of the inner wall of the container body, the pressing retainer ring is fixedly connected with the inner wall of the container body, slots are formed between the pressing retainer ring and the fixed retainer ring, the pressing grid is located the filter screen is kept away from one side of the first sewage discharge port, the edge of the pressing grid and the edge of the filter screen are inserted into the slots, and the pressing grid is used for fixing the filter screen into the slots.

In a preferred embodiment of the present invention, the connector further comprises a second connecting portion;

along the extending direction who compresses tightly the retaining ring is provided with first through-hole, along the extending direction of retaining ring is provided with the second through-hole, first through-hole with the second through-hole corresponds the setting, the second connecting portion are used for running through in proper order first through-hole, compress tightly net, filter screen and second through-hole, connecting portion be used for with compress tightly the net with the filter screen is fixed in the slot.

In a preferred embodiment of the present invention, the filter unit further comprises a control valve;

the control valve is positioned at the first sewage draining port and is used for controlling the communication or the closing between the first sewage draining port and the communication device.

In a preferred embodiment of the present invention, the filter unit further comprises a water inlet;

the supporting part includes spiral baffle, the water inlet is located on the lateral wall of container body, the water inlet is located the filter screen is close to one side of first drain hole just the water inlet with spiral baffle's entry end intercommunication, first drain hole is located spiral baffle's exit end.

The utility model provides a pair of sediment filter equipment, include: the communication device and at least two filtering units; the filtering units comprise container bodies, two adjacent container bodies are arranged in a stacked mode, the sedimentation filtering devices are used for carrying out graded and layered treatment, and a plurality of filtering units are stacked, so that a vertical treatment system is formed; a first sewage discharge port and a second sewage discharge port are formed in each container body, the communication device is positioned in the container body, one end of the communication device is connected with the second sewage discharge port, and the other end of the communication device extends into the adjacent filtering unit and is connected with the first sewage discharge port in the adjacent filtering unit; in other words, the utility model provides a sediment filter equipment is through utilizing a plurality of filter units to deposit the filtration, and each filter unit all includes first drain and second drain, wherein arbitrary one deck filter unit's precipitate can be carried through this one deck filter unit's first drain and lower one deck filter unit's intercommunication device, the second drain via lower one deck filter unit discharges, the filter unit's of last one deck precipitate can directly be discharged by this one deck first drain, thereby can guarantee the blowdown ability of each one deck filter unit, with the blowdown ability that can furthest uses the drain, the blowdown speed that the drain can't satisfy whole equipment among the sewage treatment device who has alleviated existence among the prior art, and the high technical problem of whole use cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a precipitation filter device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a filtering unit of a precipitation filtering device according to an embodiment of the present invention;

FIG. 3 is a structural diagram of a support portion of a sediment filter apparatus according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the internal flow of the support portion of the sedimentation filter apparatus according to an embodiment of the present invention.

Icon: 100-a filtration unit; 200-a communication device; 300-a container body; 400-a first drain outlet; 500-a second sewage draining exit; 600-interval support; 700-a first connection; 800-a filter screen; 900-a support portion; 110-retaining collar; 120-pressing the retainer ring; 130-compacting the mesh; 140-a second connection; 150-water inlet; 160-a backwashing device; 170-water outlet; 180-exhaust port.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, the present embodiment provides a sediment filtration apparatus, including: a communication device 200 and at least two filter units 100; the filtering unit 100 comprises container bodies 300, two adjacent container bodies 300 are arranged in a stacked manner, each container body 300 is provided with a first sewage draining port 400 and a second sewage draining port 500, the communicating device 200 is positioned in the container body 300, one end of the communicating device 200 is connected with the second sewage draining port 500, the other end of the communicating device 200 extends into the adjacent filtering unit 100 and is connected with the first sewage draining port 400 in the adjacent filtering unit 100.

It should be noted that, the sedimentation filter apparatus provided in this embodiment belongs to a multi-stage treatment system of a single filter unit 100, wherein the filter unit 100 has a filter structure and a back-flushing apparatus 160 inside, the filter structure can utilize the sewage containing suspended matters transported in the filter unit 100, under the impact of water flow, the filter mechanism can separate the sediment and the clean water, the fluid sediment is discharged from the first drain outlet 400, and the clean water is discharged from the water outlet 170 of the filter unit 100; in addition, the back washing unit 160 can wash the inside of the container body 300, and the back washing unit 160 can wash the sediments accumulated in the filtering unit 100, thereby ensuring smooth operation of the whole equipment.

The height of the container body 300 of the filter unit 100 is reduced as much as possible on the premise that the structure is satisfied, the material of the container body 300 may be a metal or a non-metal material, and preferably, the material of the container body 300 is stainless steel or PVC.

The communicating device 200 can adopt a flexible pipeline, and the flexible pipeline is used for conveying and communicating the sediments; alternatively, the communicating device 200 is a communicating pipe, the communicating pipe may be a metal pipe or a PVC conduit, and the diameter of the communicating pipe may be selected according to the filter units 100 with different treatment capacities, which is not limited herein; optionally, the communicating device 200 is a communicating pipe arranged at an included angle, wherein one end of the communicating pipe is connected with the first sewage draining outlet 400 at the end of the container body 300, the other end of the communicating pipe is connected with the second sewage draining outlet 500 on the side wall of the container body 300, and the pipe diameters of the communicating pipes can be increased at all positions of the corners, so that the communicating device 200 cannot form silting during corner conveying.

The use that the great sewage treatment volume can be realized to the sediment filter equipment that this embodiment provided, in order to improve sediment filter equipment's work efficiency, with a plurality of filter unit 100 vertical stack for module integration, make a plurality of filter unit 100 work simultaneously, can make full use of space more through the mode of stack to reduce area, make the cost reduction of unit mount and use.

The embodiment provides a sediment filtering device, includes: a communication device 200 and at least two filter units 100; the filtering units 100 comprise container bodies 300, two adjacent container bodies 300 are arranged in a superposition mode, the sedimentation filtering devices are used for carrying out graded and layered treatment, and a plurality of filtering units 100 are arranged in a superposition mode, so that a vertical treatment system is formed; a first sewage discharge outlet 400 and a second sewage discharge outlet 500 are arranged through each container body 300, the communication device 200 is positioned in the container body 300, one end of the communication device 200 is connected with the second sewage discharge outlet 500, the other end of the communication device 200 extends into the adjacent filtering unit 100, and the other end of the communication device 200 is connected with the first sewage discharge outlet 400 in the adjacent filtering unit 100; in other words, the precipitation filter device provided by the embodiment performs precipitation filtration by using a plurality of filter units 100, and each filter unit 100 includes a first sewage outlet 400 and a second sewage outlet 500, wherein the sediment of any layer of filter unit 100 can be transported through the first sewage outlet 400 of the layer of filter unit 100 and the communication device 200 of the next layer of filter unit 100, and discharged through the second sewage outlet 500 of the next layer of filter unit 100, and the sediment of the last layer of filter unit 100 can be directly discharged through the first sewage outlet 400 of the layer, so that the sewage discharge capacity of each layer of filter unit 100 can be ensured, the sewage discharge capacity of the sewage outlet can be used to the maximum extent, and the technical problems that the sewage outlet in the sewage treatment equipment in the prior art cannot meet the sewage discharge speed of the whole equipment, and the whole use cost is high are solved.

In order to ensure the stability of the stacking of any two adjacent filtering units 100, on the basis of the above embodiments, further, in a preferred embodiment of the present invention, the present invention further includes a spacing support 600; the spacer 600 is located between any two adjacent filter units 100, and both ends of the spacer 600 abut against the two filter units 100, respectively.

In the preferred embodiment of the present invention, the end of the container body 300 close to the first drain outlet 400 is provided with a plurality of spacing grooves, the plurality of spacing supports 600 are disposed in the spacing grooves, and the height of the spacing supports 600 is greater than or equal to the depth of the spacing grooves.

Preferably, the height of the spacer 600 is equal to the depth of the spacer groove, wherein the spacer 600 can be used as a reference for the equidistant arrangement of any two adjacent container bodies 300, and the two adjacent container bodies 300 are supported and fixed by the spacer 600, in this embodiment, a plurality of spacers 600 can be uniformly arranged along the axial direction of the container bodies 300, and the spacer 600 and the spacer groove can both enable any two adjacent filter units 100 to be abutted, so that the stability of the plurality of filter units 100 arranged in a stacked manner can be better maintained.

In the preferred embodiment of the present invention, the container body 300 is a cylinder, the second drain outlet 500 is located on the sidewall of the container body 300, and the first drain outlet 400 is located at the end of the container body 300.

In this embodiment, the container body 300 is cylindrical, so that the container body 300 can input the maximum amount of sewage in a specific floor area; wherein, first drain 400 is located the tip of vessel 300 to first drain 400 is located and is the vertical bottom of arranging vessel 300, and then after filtering mechanism sedimentated the inside sewage of filter unit 100, and the precipitate can get into the position department to first drain 400 under the effect of gravity.

Because first drain 400 can carry the precipitate to being located in the intercommunication device 200 of the filter unit 100 of the lower floor of filter unit 100, in order to guarantee to make the precipitate that first drain 400 of upper strata carried arrange to the environment outside, be located the lateral wall of container body 300 with second drain 500, can utilize second drain 500 to arrange the precipitate to the environment outside on the transfer passage of intercommunication device 200.

In the preferred embodiment of the present invention, the outer sidewall of the container body 300 is provided with a first connection portion 700, and any two adjacent filter units 100 are connected by the first connection portion 700.

Alternatively, the first connection portion 700 may be selected from a plurality of types, for example: the first connecting part 700 adopts a hanging lug with a threaded hole, and when any adjacent filtering units 100 are overlapped, the hanging lugs of the two filtering units 100 can be respectively connected by using bolts, so that the connection stability of the whole structure can be ensured; alternatively, the first connection portion 700 may adopt a buckle, a thread gluing, etc., which are not described herein again.

In the preferred embodiment of the present invention, the filter unit 100 further includes a filter screen 800 and a support portion 900; the supporting portion 900 is located in the container body 300, and the supporting portion 900 is located between the first drain opening 400 and the filter screen 800, and the filter screen 800 is disposed on the supporting portion 900, so that the sediment in the filter unit 100 enters the first drain opening 400 through the filter screen 800 under the action of gravity.

Optionally, the filter screen 800 is made of stainless steel, and the filter screen 800 is installed in the middle of the vertical direction of the filter unit 100, so that sewage can enter from the lower portion of the filter screen 800 and gradually flow out from the upper portion of the filter screen.

In addition, the filter screen 800 may include a working filter screen, the supporting portion 900 may support the filter screen 800, and the supporting portion 900 may not obstruct the flow of the sewage and the sediment. The precision of the working filter screen can be set according to the requirement for water outlet, optionally, the precision of the working filter screen is 200-600 meshes, and preferably, the precision of the working filter screen is 400 meshes.

In order to ensure the stability of the installation of the filter screen 800, in the preferred embodiment of the present invention, the filter unit 100 further includes a fixed retainer 110, a pressing retainer 120 and a pressing grid 130; the fixed retainer ring 110 extends circumferentially along the inner wall of the container body 300, the fixed retainer ring 110 is fixedly connected with the inner wall of the container body 300, the fixed retainer ring 110 and the supporting part 900 are positioned on the same horizontal plane, and the edge of the filter screen 800 close to the inner wall of the container body 300 is arranged on the fixed retainer ring 110; compress tightly retaining ring 120 and be located the one side that first drain outlet 400 was kept away from to retaining ring 110, compress tightly retaining ring 120 and extend the setting along the inner wall circumference of vessel 300, compress tightly the inner wall fixed connection of retaining ring 120 and vessel 300, compress tightly and form the slot between retaining ring 120 and the retaining ring 110, it is located the one side that first drain outlet 400 was kept away from to filter screen 800 to compress tightly net 130, the edge that compresses tightly net 130 and the edge of filter screen 800 all insert and locate in the slot, compress tightly net 130 and be used for being fixed in the slot with filter screen 800.

The compression grid 130 may be a structural net with a relatively strong rigidity covered on the upper layer of the filter screen 800, so as to prevent the filter screen 800 from arching upwards, and when the area of the filter screen 800 is relatively large, more measures for improving rigidity should be taken, for example, rigid supports such as flat steel are added at intervals.

In the preferred embodiment of the present invention, the present invention further comprises a second connecting portion 140; the first through hole is arranged along the extending direction of the pressing retainer ring 120, the second through hole is arranged along the extending direction of the fixing retainer ring 110, the first through hole and the second through hole are correspondingly arranged, the second connecting part 140 is used for sequentially penetrating through the first through hole, the pressing grid 130, the filter screen 800 and the second through hole, and the connecting part is used for fixing the pressing grid 130 and the filter screen 800 in the slot.

Alternatively, the second connection portion 140 may be a screw, wherein the second connection portion 140 may be a fixing screw, and the fixing screw is directly inserted into the first through hole and the second through hole, so that the filter screen 800 and the compression mesh 130 have fixing points in the horizontal direction, and can be fixed at the edge positions of the filter screen 800 and the compression mesh 130; wherein, the pressing grid 130 may adopt a metal grid fixing layer.

Optionally, the fixing retainer ring 110 and the inner wall of the container body 300 may be integrally formed, or may be fixedly connected by welding or the like; meanwhile, the pressing retainer ring 120 may be integrally formed with the inner wall of the container body 300, or may be fixedly connected by welding, and the like, and is not limited herein.

In a preferred embodiment of the present invention, the filter unit 100 further comprises a control valve; a control valve is located at the first drain port 400, and the control valve is used to control communication or closing between the first drain port 400 and the communication device 200.

Alternatively, the control valve may be a solenoid valve, a butterfly valve, or the like, and any one of the filter units 100 may be operated or closed by the control valve by using the plurality of filter units 100 in parallel.

In this embodiment, a filtered clean water area is disposed above the filter screen 800, wherein clean water in the filtered clean water area can be discharged from the water outlet 170, the water outlet 170 is also the water inlet 150 during backwashing and is used for introducing clean water during backwashing, and the backwashing clean water can pass through the filter screen 800 from top to bottom to clean dirt adhered to the filter screen.

In addition, the filtered clean water area is also provided with an air inlet during backflushing, the air inlet is used for introducing high-pressure instant gas, dirt possibly adhered to the filter screen 800 is blown off by the high-pressure instant gas, spray pipes and spray heads can be uniformly distributed in the clean water area in an extending mode through the air inlet, and a plurality of spray pipes and spray heads can be distributed according to the whole working area; preferably, what the orientation of shower nozzle was adopted is that the shower nozzle upwards spouts gas, and its aim at is when aerifing, and gaseous can form the air cushion chamber at the upper portion in clear water district at first, relies on pressure to promote rivers and pass filter screen 800 downwards, and then gaseous filter screen 800 that passes again to can make filter unit 100 at the combined action of backwash water + recoil gas, can effectively realize the backwash effect, make the design more reasonable.

Wherein, compressed air is spouted in the air inlet of back flush in the twinkling of an eye, realization that can be better washes the effect, can also realize energy-conserving effect simultaneously, can be for a few seconds in the twinkling of an eye can, has reduced the working costs than admitting air in succession.

In a preferred embodiment of the present invention, the filter unit 100 further comprises a water inlet 150; the supporting portion 900 includes a spiral baffle, the water inlet 150 is located on the side wall of the container body 300, the water inlet 150 is located on one side of the filter screen 800 close to the first drain port 400 and the inlet end of the water inlet 150 is communicated with the spiral baffle, and the first drain port 400 is located at the outlet end of the spiral baffle.

Specifically, when the filtering unit 100 is operated, sewage containing suspended matters enters the container body 300 from the water inlet 150, water flows along the channel formed by the spiral baffle plate in a rotating manner from the outer diameter to the center, and if the control valve connected with the first sewage discharge port 400 is fully opened, the water flow is fully discharged, namely, the state during sewage discharge; when the control valve of the first drain port 400 is closed during operation, the water flow continues to rise while rotating, the rising power comes from the water level difference between the inlet water and the outlet water, and in the rising process of the water flow, the air in the container body 300 is continuously compressed, and the air is discharged from the drain port 180, so that the water flow is kept smoothly upward and flows out from the water outlet 170 through the filter screen 800.

Further, in the process of intercepting suspended matters, the filter screen 800 can gradually form a sludge layer with the suspended matters gathered on the lower surface, if no measures are taken, the flow can be gradually reduced, the sewage in the embodiment also rotates while rising, and the rotation can form shearing force on the sewage intercepted on the lower surface of the filter screen 800, so that the blockage of the intercepted sewage on the filter screen 800 can be relieved; by controlling the rising speed of the water flow, the water flow still has a certain sedimentation effect, so that the sludge gathered below the filter screen 800 is separated from the filter screen through gravity and rotary shearing force, and the effective working period is prolonged as much as possible.

It should be noted that: although the way of the above-mentioned sediment and the shearing force formed by the water flow can reduce the blockage of the filter screen 800 caused by the intercepted dirt, the filter screen 800 cannot be completely cleaned, and the surface of the filter screen 800 still accumulates certain dirt, but the layer of dynamically-maintained dirt forms a filtering effect, and the layer of dynamically-maintained dirt has a higher filtering and intercepting effect than the filter screen 800 alone, such as the capability of intercepting colloid and the like. Alternatively, the water inlet and outlet head difference can be adjusted according to the water inlet and outlet requirements, so that the time period of the first drain port 400 connected with the opening of the control valve can be adjusted to form dynamic balance in a long time, and the period of filtering and shutdown backwashing can be stably adjusted.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A sediment filtration apparatus comprising: the communication device and at least two filtering units;

the filter unit includes the vessel, adjacent two the vessel is the stack and arranges, each the vessel is provided with first drain and second drain, the intercommunication device is located the vessel is originally internal, just the one end of intercommunication device with the second drain is connected, the other end of intercommunication device extends to adjacent in the filter unit, and with adjacent in the filter unit first drain is connected.

2. The sediment filtration device of claim 1 further comprising a spacer support;

the interval support is positioned between any two adjacent filtering units, and two ends of the interval support are respectively abutted to the two filtering units.

3. The sediment filter of claim 2 wherein the container body is provided with a plurality of spaced grooves at an end thereof adjacent to the first drain outlet, and the plurality of spaced supports are positioned in the spaced grooves and have a height greater than or equal to the depth of the spaced grooves.

4. The sediment filter apparatus of claim 1 wherein the vessel body is cylindrical, the second discharge outlet is located on a side wall of the vessel body, and the first discharge outlet is located at an end of the vessel body.

5. The sediment filtration device of claim 1 wherein the outer side wall of the container body is provided with a first connecting portion through which any adjacent two of the filtration units are connected.

6. A sediment filtration arrangement according to any one of claims 1-5 wherein the filtration unit further comprises a filter screen and a support;

the supporting part is located the container is originally internal, just the supporting part is located first drain outlet with between the filter screen, the filter screen arrange in on the supporting part, so that precipitate in the filter unit passes through under the effect of gravity the filter screen gets into extremely first drain outlet.

7. The sediment filtration device of claim 6 wherein the filtration unit further comprises a retaining collar, a hold down collar and a hold down mesh;

the fixed retainer ring extends along the circumferential direction of the inner wall of the container body, the fixed retainer ring is fixedly connected with the inner wall of the container body, the fixed retainer ring and the supporting part are positioned on the same horizontal plane, and the edge of the filter screen close to the inner wall of the container body is arranged on the fixed retainer ring;

the pressing retainer ring is located the fixed retainer ring is kept away from one side of the first sewage discharge port, the pressing retainer ring is arranged along the circumferential extension of the inner wall of the container body, the pressing retainer ring is fixedly connected with the inner wall of the container body, slots are formed between the pressing retainer ring and the fixed retainer ring, the pressing grid is located the filter screen is kept away from one side of the first sewage discharge port, the edge of the pressing grid and the edge of the filter screen are inserted into the slots, and the pressing grid is used for fixing the filter screen into the slots.

8. The sediment filtration device of claim 7 further comprising a second connection portion;

along the extending direction who compresses tightly the retaining ring is provided with first through-hole, along the extending direction of retaining ring is provided with the second through-hole, first through-hole with the second through-hole corresponds the setting, the second connecting portion are used for running through in proper order first through-hole, compress tightly net, filter screen and second through-hole, connecting portion be used for with compress tightly the net with the filter screen is fixed in the slot.

9. The sediment filtration device of claim 6 wherein the filtration unit further comprises a control valve;

the control valve is positioned at the first sewage draining port and is used for controlling the communication or the closing between the first sewage draining port and the communication device.

10. The sediment filtration device of claim 6 wherein the filtration unit further comprises a water inlet;

the supporting part includes spiral baffle, the water inlet is located on the lateral wall of container body, the water inlet is located the filter screen is close to one side of first drain hole just the water inlet with spiral baffle's entry end intercommunication, first drain hole is located spiral baffle's exit end.

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