CN212731241U

CN212731241U - Urban building sewage treatment plant

Info

Publication number: CN212731241U
Application number: CN202021260252.5U
Authority: CN
Inventors: 郑曼铃; 郑晓泽; 林泽武
Original assignee: Shenzhen Jinyuanda Construction Group Co ltd
Current assignee: Shenzhen Jinyuanda Construction Group Co ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-03-19
Anticipated expiration: 2030-07-01

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an urban building sewage treatment device, which comprises a rainwater pipeline, a filter screen plate, a cleaning mechanism for cleaning suspended matters such as sludge on the filter screen plate and a sewage tank for containing water body filtered by the filter screen plate, wherein the rainwater pipeline is provided with a water inlet end and a water outlet end, the water outlet end of the rainwater pipeline is communicated with the sewage tank, the cleaning mechanism is positioned at one side of the filter screen plate far away from the water inlet end, the cleaning mechanism comprises a water inlet pipeline, a water outlet pipeline, a first flushing pipeline, a high-pressure spray nozzle for flushing the filter screen plate and a water pump, the water inlet pipeline is communicated with the sewage tank, the input end of the water pump is communicated with the water inlet pipeline, the output end of the water pump is communicated with the water outlet pipeline, the first flushing pipeline is communicated with the water outlet pipeline, and, the high-pressure spray head faces the filter screen plate. The utility model discloses have and to wash filter plate in case rainwater pipeline blocks up's effect.

Description

Urban building sewage treatment plant

Technical Field

The utility model belongs to the technical field of sewage treatment's technique and specifically relates to a city building sewage treatment plant is related to.

Background

In the process of urban building construction, the treatment and the reutilization of the sewage become a good method which not only realizes economic benefits, but also can realize social benefits. The treated sewage is used for replacing new water, so that the consumption of the new water is reduced to the maximum extent, the tension of water resources is relieved, and the pollution of the sewage to the environment is reduced to the minimum extent.

Reference bulletin number is CN 209243858U's utility model patent, this utility model discloses a device of decontaminating of sponge city sump pit, including rainwater pipeline, sludge impoundment, bilge pit, filtering mechanism and sludge pump, be provided with the filtration otter board of slope on the rainwater pipeline, rainwater pipeline right-hand member is linked together with the bilge pit is inside, and rainwater pipeline left side lower extreme is fixed with the sludge pump standing groove, sludge pump standing groove internally mounted has the sludge pump, and the sludge pump output is linked together with the blow off pipe, and the input of sludge pump is linked together through drain and the sludge impoundment lower extreme of sludge pipe and bilge pit lower extreme, and when using the device of decontaminating of this sponge city sump pit, at first the water flows into inside the bilge pit through filtering otter board through rainwater pipeline.

The above prior art solutions have the following drawbacks: in the long-term use of filter plate, thereby can the adhesion pile up suspended solid such as mud on the filter plate usually and lead to filter the plate jam, influence the water in the rainwater pipeline inside flowing into the bilge pit through filtering the otter board on the contrary to influence the realization of the work of decontaminating of sewage, still have the space of treating the improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an urban building sewage treatment plant has the advantage that can wash and filter the otter board in case rainwater pipeline blocks up.

The utility model discloses a can realize through following technical scheme:

a sewage treatment device for urban buildings comprises a rainwater pipeline, a filter screen plate for filtering water in the rainwater pipeline, a cleaning mechanism for cleaning suspended matters such as sludge on the filter screen plate and a sewage tank for containing the water filtered by the filter screen plate, wherein the rainwater pipeline is provided with a water inlet end and a water outlet end, the water outlet end of the rainwater pipeline is communicated with the sewage tank, the cleaning mechanism is positioned on one side of the filter screen plate away from the water inlet end, the cleaning mechanism comprises a water inlet pipeline, a water outlet pipeline, a first flushing pipeline, a high-pressure spray nozzle for flushing the filter screen plate and a water pump, the water inlet pipeline is communicated with the sewage tank, the input end of the water pump is communicated with the water inlet pipeline, the output end of the water pump is communicated with the water outlet pipeline, the first flushing pipeline is communicated with the water outlet pipeline, and the high-pressure spray nozzle is arranged on the first flushing pipeline, the high-pressure spray head faces the filter screen plate.

Through adopting above-mentioned technical scheme, the water flows into inside the bilge pit through the filter plate in the rainwater pipeline, when filter plate when using the adhesion after for a long time and piling up suspended solid such as mud, start the water pump, the outlet conduit is carried with bilge pit internal water body to the water pump, high pressure nozzle washes filter plate, thereby wash suspended solid such as mud on the filter plate, prevent to filter the filter plate with excessive suspended solid such as accumulational mud and block up filter plate, finally lead to blockking up rainwater pipeline, the water after the filtration flows into the bilge pit at last, thereby the processing and the reuse of sewage have been realized, the at utmost reduces the new water quantity, alleviate the nervous situation of water resource, reduce the pollution of sewage to the environment to minimum.

The utility model discloses further set up to: the cleaning mechanism further comprises a controller, an electronic timer and a liquid level sensor used for monitoring the safe water pumping level of the water pump, the liquid level sensor is installed in the filter, the liquid level sensor and the electronic timer are electrically connected with the controller, a wireless transmission device is arranged in the electronic timer, and the water pump is electrically connected with the controller.

Through adopting above-mentioned technical scheme, be provided with wireless transmission device in the electronic timer, the staff's remote control of being convenient for is in order to carry out the relevant edition of using to the electronic timer to the frequency of control wiper mechanism washing filter plate. Editing an electronic timer to specify the starting time of the water pump, when the specified time of the electronic timer is reached, transmitting a signal to a controller by the electronic timer, simultaneously transmitting a signal of a safe pumping level to the controller by a liquid level sensor, after the two conditions are met, controlling a motor of the water pump to be started by the controller, starting the water pump to pump water from a filter so as to provide water for a water inlet pipeline and a water outlet pipeline, and starting a high-pressure nozzle to clean a filter screen plate.

The utility model discloses further set up to: the cleaning mechanism further comprises a filter, the filter is installed in the sewage tank and is a box body with a cavity, the side wall of the filter is provided with a filter hole, the filter is communicated with the sewage tank through the filter hole, and the side wall of the filter is provided with a socket for inserting the water inlet pipeline into the filter.

Through adopting above-mentioned technical scheme, will get into the water in the inlet channel and filter to debris in the sewage tank cause the inlet channel to block up, thereby influence wiper mechanism's life.

The utility model discloses further set up to: the mesh number of the filtering holes is larger than that of the porous pressing plate.

Through adopting above-mentioned technical scheme, guarantee that the water in the filter is difficult for blockking up the inlet channel, the life of extension water pump to extension wiper mechanism's life.

The utility model discloses further set up to: still include the sludge impoundment, the sludge impoundment sets up in rainwater pipeline bottom, the sludge impoundment is located one side that drainage end was kept away from to filter plate, sludge impoundment and rainwater pipeline intercommunication set up.

Through adopting above-mentioned technical scheme, suspended solid such as mud that is filtered by filter plate is depositd in the sludge impoundment, and cleans suspended solid such as mud that the mechanism cleaned and also falls into the sludge impoundment in order to collect, reduces rainwater pipeline and filter plate's jam.

The utility model discloses further set up to: rainwater pipeline bottom is provided with the sludge pump and offers the holding tank that is used for installing the sludge pump, the input intercommunication of sludge pump is provided with the sludge pipe, the lower extreme intercommunication of sludge pipe and sludge tank sets up, the output intercommunication of sludge pump is provided with the blow off pipe, sludge pump and controller electric connection.

Through adopting above-mentioned technical scheme, when suspended solids such as the mud of sludge impoundment were more, opening of controller control sludge pump, the mud pump passes through the blow off pipe with the mud of sludge inslot sedimentary and discharges, and convenient and fast has avoided suspended solids such as the mud of sludge inslot to excessively pile up.

The utility model discloses further set up to: sewage tank internally mounted has filtering mechanism, the filtering mechanism up end is located drainage end below, filtering mechanism is including filtering support, porous clamp plate and active carbon filter layer, filtering support fixes on the sewage tank lateral wall, porous clamp plate is provided with two-layerly, porous clamp plate, active carbon filter layer, porous clamp plate set gradually on filtering mechanism from last to down, the filter is located the filtering mechanism below, be provided with the overflow pipe that is used for the water discharge sewage tank after will filtering on the sewage tank lateral wall, the overflow pipe is located the filtering mechanism below.

Through adopting above-mentioned technical scheme, the water that filtering mechanism falls into the sewage tank from the rainwater pipeline is further filtered, and one is that the water of guaranteeing to follow overflow pipe discharge sewage tank is cleaner, and another is that the circulating water who guarantees the wiper mechanism is cleaner, guarantees that water filtered through filtering mechanism can not block up inlet channel and water pump.

The utility model discloses further set up to: the cleaning mechanism further comprises a second flushing pipeline, the second flushing pipeline is communicated with the water outlet pipeline, and a high-pressure spray head used for flushing the porous pressing plate and the activated carbon filter layer is also installed on the second flushing pipeline.

By adopting the technical scheme, the water body flows into the sewage tank after being filtered by the filter screen plate in the rainwater pipeline,

the filtering mechanism further filters the water body flowing into the sewage tank, in the past, a porous pressing plate and an active carbon filtering layer on the cleaning mechanism can be adhered with suspended matters such as sludge, so that the filtering effect of the filtering mechanism is influenced, a water pump is started, the water pump conveys the water body in the sewage tank to a water outlet pipeline, a high-pressure spray head on a second flushing pipe flushes the filtering mechanism, so that the suspended matters such as the sludge on the porous pressing plate and the active carbon filtering layer are flushed, the filtered water body is discharged from an overflow pipe, the sewage treatment and recycling are realized, the new water consumption is reduced to the maximum extent, the nervous condition of water resources is relieved, and the pollution of the sewage to the environment is reduced to the minimum extent.

The utility model discloses further set up to: the filter screen plate is obliquely arranged inside the rainwater pipeline, the oblique direction of the filter screen plate is oblique from the water inlet end to the water discharge end, and the lower end of the filter screen plate is fixedly connected with a supporting plate for supporting the filter screen plate.

Through adopting above-mentioned technical scheme, the filter plate slope sets up the degree of difficulty that has increased suspended solid such as mud in the rainwater pipeline through the filter plate, and the setting of filter plate slope towards the sludge impoundment slope is convenient for by the suspended solid such as mud that the filter plate intercepted flow into the sludge impoundment.

The utility model discloses further set up to: the supporting plate is obliquely arranged, the oblique direction of the supporting plate inclines from the drainage end to the water inlet end, and one end, far away from the filter screen plate, of the supporting plate extends towards the inside of the sludge tank.

Through adopting above-mentioned technical scheme, the backup pad slope sets up and is further convenient for through the inclined plane landing of backup pad to the sludge groove in suspended solid such as mud after the filter plate filters to concentrate on and handle in the sludge groove.

To sum up, the utility model discloses a beneficial technological effect does:

1. the cleaning mechanism is arranged to wash suspended matters such as sludge and the like adhered and accumulated on the filter screen plate so as to prevent the suspended matters such as sludge and the like excessively accumulated on the filter screen plate from blocking the filter screen plate, and a water body filtered by the filter screen plate is adopted to wash the filter screen plate, so that the treatment and the reutilization of sewage are realized, the new water consumption is reduced to the maximum extent, the tension of water resources is relieved, and the pollution of the sewage to the environment is reduced to the minimum extent;

2. through setting up automation equipment such as electronic timer, controller, water pump, sludge pump, can furthest avoid suspended solid such as mud to block up filter plate and rainwater pipeline, can clean the frequency that the mechanism cleaned filter plate by automatic control.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of another perspective structure according to an embodiment of the present invention.

In the figure, 1, a rainwater pipeline; 101. a water inlet end; 102. a drainage end; 2. a filter screen plate; 3. a cleaning mechanism; 31. a water inlet pipe; 32. a water outlet pipeline; 33. a first flush line; 34. a second flush line; 35. a high pressure spray head; 36. a filter; 361. filtering holes; 362. a socket; 37. a water pump; 38. a liquid level sensor; 4. a sewage tank; 41. a sewage collecting tank; 42. a sewage draining outlet; 43. a spiral deflector; 5. a sludge tank; 6. a sludge pump; 61. a blow-off pipe; 62. a sludge pipe; 7. accommodating grooves; 8. a support plate; 9. a filtering mechanism; 91. a filter frame; 92. a porous platen; 10. and (4) an overflow pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a city building sewage treatment plant, including rainwater pipeline 1, set up filter plate 2 in rainwater pipeline 1, be used for wasing the wiper mechanism 3 that filters suspended solid such as mud on filter plate 2 and be used for holding the sewage tank 4 of the water after filter plate 2 filters. The rainwater pipe 1 has a water inlet end 101 and a water outlet end 102, and the water outlet end 102 of the rainwater pipe 1 and the sewage tank 4 are communicated.

Referring to fig. 2, preferably, the rainwater pipe 1 is horizontally disposed, and the cross section of the rainwater pipe 1 is circular. Rainwater pipeline 1 bottom is provided with sludge tank 5 that is used for holding suspended solids such as mud, and sludge tank 5 is round platform groove structure, and even spiral is provided with spiral guide plate 43 in the sludge tank 5. The sludge tank 5 is communicated with the rainwater pipeline 1. The filter screen 2 is used for filtering suspended matters such as sludge in a water body in the rainwater pipeline 1, the filter screen 2 is obliquely arranged in the rainwater pipeline 1, and the oblique direction of the filter screen 2 is oblique from the water inlet end 101 to the water outlet end 102. The filter plate is positioned on one side of the sludge tank 5 close to the drainage end 102. The lower end of the filter screen plate 2 is fixedly connected with a supporting plate 8 used for supporting the filter screen plate 2, the supporting plate 8 is arranged in an inclined mode, the inclined direction of the supporting plate 8 inclines from the drainage end 102 to the water inlet end 101, so that the filter screen plate 2 and the supporting plate 8 form an acute angle facing the sludge tank 5, one end, far away from the filter screen plate 2, of the supporting plate 8 extends towards the inside of the sludge tank 5, and suspended matters such as sludge intercepted by the filter screen plate 2 can conveniently flow into the sludge tank 5.

With continued reference to fig. 2, the sump 4 has the filter mechanism 9 mounted therein, and the upper end surface of the filter mechanism 9 is located below the drain end 102. The filter mechanism 9 includes a filter holder, a porous press plate 92, and an activated carbon filter layer (not shown in the figure). The section of filtering support is trapezium structure, and the opening of filtering support is up, and filtering support passes through the bolt fastening on 4 lateral walls of bilge pit. The porous pressing plate 92 is provided with two layers, and the porous pressing plate 92 and the activated carbon filter are sequentially arranged on the filtering mechanism 9 from top to bottom. An overflow pipe 10 for discharging the filtered water out of the sewage tank 4 is arranged on the side wall of the sewage tank 4. The overflow pipe 10 is located below the filter means 9. The bottom of the sewage tank 4 is provided with a sewage collecting tank 41, and the sewage collecting tank 41 is provided with a sewage outlet 42. Rainwater pipeline 1 bottom is provided with sludge pump 6 and offers holding tank 7 that is used for installing sludge pump 6, and holding tank 7 and rainwater pipeline 1 keep apart the setting. The input end of the sludge pump 6 is communicated with a sludge pipe 62, and the sludge pipe 62 is communicated with the lower end of the sludge tank 5 and the sewage outlet 42. The output end of the sludge pump 6 is communicated with a sewage discharge pipe 61.

With continued reference to fig. 2, the cleaning mechanism 3 is located on a side of the filter screen plate 2 away from the water inlet end 101, and the cleaning mechanism 3 includes a water inlet pipe 31, a water outlet pipe 32, a first flushing pipe 33 for flushing the filter screen plate 2, a second flushing pipe 34 for flushing the filter mechanism 9, a high pressure spray nozzle 35, a filter 36 for filtering the water entering the water inlet pipe 31, and a water pump 37. The filter 36 is located below the overflow pipe 10, and the filter 36 is fixed to the side wall of the sump 4. The filter 36 is a box body with a cavity, the side wall of the filter 36 is provided with filter holes 361, the filter 36 is communicated with the sewage tank 4 through the filter holes 361, and the mesh number of the filter holes 361 is larger than that of the porous pressing plate 92, so that the water inlet pipeline 31 is prevented from being blocked. The top wall of the filter 36 is provided with a socket 362 for inserting the inlet pipe 31 into the filter 36. The water inlet pipe 31 and the water outlet pipe 32 are both fixed on the inner wall of the sewage tank 4, and the water inlet pipe 31 is communicated with the sewage tank 4. The water pump 37 is located above the overflow pipe 10, the water pump 37 is fixedly connected to the side wall of the sewage tank 4, the input end of the water pump 37 is communicated with the water inlet pipeline 31, the output end of the water pump 37 is communicated with the water outlet pipeline 32, and the first flushing pipeline 33 and the second flushing pipeline 34 are communicated with the water outlet pipeline 32. The number of the high pressure nozzles 35 is two, and the two high pressure nozzles 35 are respectively disposed in the first flushing pipe 33 and the second flushing pipe 34. The high-pressure spray head 35 on the first flushing pipeline 33 faces the filter screen plate 2, and the high-pressure spray head 35 on the second flushing pipeline 34 is positioned above the filter mechanism 9 and faces the porous pressing plate 92 and the activated carbon filter layer of the filter mechanism 9.

With continued reference to FIG. 2, the washing mechanism 3 further includes a level sensor 38 for monitoring the safe pumping level of the water pump 37, a controller (not shown), and an electronic timer (not shown). The liquid level sensor 38 is installed in the filter 36, and the liquid level sensor 38 and the electronic timer are electrically connected with the controller. Be provided with wireless transmission device in the electronic timer, be convenient for staff's remote control in order to carry out the relevant editor that uses to the electronic timer to the frequency of control wiper mechanism 3 washing filter screen 2 and filter mechanism 9. The sludge pump 6 and the water pump 37 are electrically connected with the controller.

Editing an electronic timer to specify the starting time of the water pump 37 and the sludge pump 6, when the specified time of the electronic timer is reached, transmitting a signal to a controller by the electronic timer, simultaneously transmitting a signal of safe water pumping level to the controller by the liquid level sensor 38, after the two conditions are met, controlling a motor of the water pump 37 to be started by the controller, starting the water pump 37 to pump water from the filter 36 so as to provide water for the water inlet pipeline 31 and the water outlet pipeline 32, and starting the cleaning of the filter screen plate 2 and the filter mechanism 9 by the high-pressure nozzle 35. The controller controls the sludge pump 6 to be started, and the sludge pump 6 discharges the sludge deposited in the sludge tank 5 and the sludge collecting tank 41 through the sewage discharge pipe 61.

The utility model discloses an implement the principle and do: editing the electronic timer to stipulate the time of opening of the water pump 37 and the sludge pump 6, when the time stipulated by the electronic timer is reached, the electronic timer transmits a signal to the controller, meanwhile, the liquid level sensor 38 transmits a signal of safe pumping level to the controller, after the two conditions are met, the controller controls the motor of the water pump 37 to be opened, the water pump 37 starts pumping water from the filter 36 so as to provide water for the water inlet pipeline 31 and the water outlet pipeline 32, the high-pressure spray head 35 starts cleaning the filter screen 2 and the filter mechanism 9, the cleaned suspended matters such as sludge fall into the sludge tank 5 and the sludge collection tank 41 respectively, the controller controls the sludge pump 6 to be opened, and the sludge pump 6 discharges the sludge deposited in the sludge tank 5 and the sludge collection tank 41 through the discharge pipe 61.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an urban construction sewage treatment plant which characterized in that: comprises a rainwater pipeline (1), a filter screen plate (2) used for filtering a water body in the rainwater pipeline (1), a cleaning mechanism (3) used for cleaning suspended matters such as sludge on the filter screen plate (2) and a sewage tank (4) used for containing the water body filtered by the filter screen plate (2), wherein the rainwater pipeline (1) is provided with a water inlet end (101) and a water outlet end (102), the water outlet end (102) and the sewage tank (4) of the rainwater pipeline (1) are communicated, the cleaning mechanism (3) is positioned on one side of the filter screen plate (2) far away from the water inlet end (101), the cleaning mechanism (3) comprises a water inlet pipeline (31), a water outlet pipeline (32), a first flushing pipeline (33), a high-pressure spray nozzle (35) used for flushing the filter screen plate (2) and a water pump (37), the water inlet pipeline (31) is communicated with the sewage tank (4), the input and inlet channel (31) intercommunication setting of water pump (37), the output and outlet channel (32) intercommunication setting of water pump (37), first flushing conduit (33) and outlet channel (32) intercommunication setting, high pressure nozzle (35) set up in first flushing conduit (33), high pressure nozzle (35) are towards filter plate (2).

2. The municipal building wastewater treatment device according to claim 1, wherein: the cleaning mechanism (3) further comprises a controller, an electronic timer and a liquid level sensor (38) used for monitoring the safe water pumping level of the water pump (37), the liquid level sensor (38) is installed in the filter (36), the liquid level sensor (38) and the electronic timer are electrically connected with the controller, a wireless transmission device is arranged in the electronic timer, and the water pump (37) is electrically connected with the controller.

3. The municipal building wastewater treatment device according to claim 1, wherein: the cleaning mechanism (3) further comprises a filter (36), the filter (36) is installed in the sewage tank (4), the filter (36) is a box body with a cavity, a filtering hole (361) is formed in the side wall of the filter (36), the filter (36) is communicated with the sewage tank (4) through the filtering hole (361), and a socket (362) for the water inlet pipeline (31) to be inserted into the filter (36) is formed in the side wall of the filter (36).

4. The municipal building wastewater treatment apparatus according to claim 3, wherein: the mesh number of the filter holes (361) is larger than that of the porous pressing plate (92).

5. The municipal building wastewater treatment device according to claim 1, wherein: still include sludge impoundment (5), sludge impoundment (5) set up in rainwater pipeline (1) bottom, sludge impoundment (5) are located filter screen (2) and keep away from one side of drainage end (102), sludge impoundment (5) and rainwater pipeline (1) intercommunication set up.

6. The municipal building wastewater treatment device according to claim 1, wherein: rainwater pipeline (1) bottom is provided with sludge pump (6) and offers holding tank (7) that are used for installing sludge pump (6), the input intercommunication of sludge pump (6) is provided with sludge pipe (62), the lower extreme intercommunication setting of sludge pipe (62) and sludge groove (5), the output intercommunication of sludge pump (6) is provided with blow off pipe (61), sludge pump (6) and controller electric connection.

7. The municipal building wastewater treatment apparatus according to claim 3, wherein: sewage tank (4) internally mounted has filtering mechanism (9), filtering mechanism (9) up end is located drainage end (102) below, filtering mechanism (9) are including filtering support, porous clamp plate (92) and active carbon filter layer, filter the support and fix on sewage tank (4) lateral wall, porous clamp plate (92) are provided with two-layerly, porous clamp plate (92), active carbon filter layer, porous clamp plate (92) set gradually on filtering mechanism (9) from last to down, filter (36) are located filtering mechanism (9) below, be provided with overflow pipe (10) that are used for water discharge sewage tank (4) after filtering on sewage tank (4) lateral wall, overflow pipe (10) are located filtering mechanism (9) below.

8. The municipal building wastewater treatment device according to claim 1, wherein: the cleaning mechanism (3) further comprises a second flushing pipeline (34), the second flushing pipeline (34) is communicated with the water outlet pipeline (32), and a high-pressure spray head (35) used for flushing the porous pressing plate (92) and the activated carbon filter layer is also installed on the second flushing pipeline (34).

9. The municipal building wastewater treatment device according to claim 1, wherein: the filtering net plate (2) is obliquely arranged inside the rainwater pipeline (1), the oblique direction of the filtering net plate (2) is oblique from the water inlet end (101) to the water outlet end (102), and the lower end of the filtering net plate (2) is fixedly connected with a supporting plate (8) used for supporting the filtering net plate (2).

10. The municipal building wastewater treatment apparatus according to claim 9, wherein: the supporting plate (8) is obliquely arranged, the oblique direction of the supporting plate (8) inclines from the drainage end (102) to the water inlet end (101), and one end, far away from the filter screen plate (2), of the supporting plate (8) extends towards the inside of the sludge tank (5).