CN209583898U - A sewage treatment system - Google Patents

Abstract

The utility model discloses a kind of sewage disposal systems, belong to technical field of environment protection equipment, including water inlet pipe, coagulation device, two stage treatment device and tertiary treatment device, the coagulation device is connected to by the first water-supply-pipe with the two stage treatment device, the two stage treatment device is connected to by the second water-supply-pipe with the tertiary treatment device, the first water pump and the second water pump are respectively arranged on first water-supply-pipe and second water-supply-pipe, first processing unit includes filter cylinder, the periphery of the filter cylinder is provided with shell, cavity is formed between the filter cylinder and the shell, the water inlet pipe extends in the filter cylinder, multiple first through hole are provided on the periphery of the filter cylinder, at least one layer of first filter screen is provided in the cavity of first water-supply-pipe.By the setting of filter cylinder, at least one layer of first filter screen and the first water pump, sewage is made to remove the precipitable impurity such as sludge, good impurity removing effect in coagulation device.

Description

A sewage treatment system

technical field

The utility model relates to the technical field of environmental protection equipment, in particular to a sewage treatment system.

Background technique

Sewage treatment refers to the process of treating sewage in order to make it discharge to a certain water body or reuse water quality. In modern life, especially with the deepening of urbanization, the living density of the population continues to increase, so the domestic wastewater and some other sewage in the population are also increasing. At the same time, in order to find more space in the existing living environment, urban construction is also increasingly developing towards high-rise buildings and underground buildings. But the problem of urban pollution, especially the problem of domestic sewage is also becoming more and more serious.

Sewage treatment can be divided into primary treatment, secondary treatment and tertiary treatment according to the degree of treatment. The primary treatment is mainly to remove the suspended solid matter in the sewage. The wastewater after the primary treatment is still not suitable for discharge and must be treated in the secondary treatment. The main task of the secondary treatment is to substantially remove colloidal and dissolved organic matter in the sewage. Generally, the sewage after the secondary treatment can meet the discharge standard. The purpose of the tertiary treatment is to further remove certain special pollutants, such as fluoride removal, phosphorus removal, etc., which belongs to advanced treatment.

The primary treatment of existing sewage treatment equipment is generally filtered by setting multiple filter layers. The existing defect is that it is prone to clogging and affects the efficiency of sewage treatment. Some of them use sedimentation method for treatment. The existing defect is that there will be some In addition, the sludge after precipitation is not easy to discharge, which also affects the efficiency of sewage treatment. If the primary treatment is not handled properly, it will directly affect the subsequent secondary and tertiary treatment; the current biological treatment of organic waste equipment is generally It is to set up anaerobic pool, aerobic pool and anoxic pool, which are connected with pipelines, valves and water pumps, which occupy a large area, consume high energy, and are not environmentally friendly.

Utility model content

In view of the above-mentioned existing sewage treatment system in the primary treatment, the filter layer is prone to clogging and the water flow will be mixed with certain precipitated impurities, which will directly affect the defects of the subsequent secondary and tertiary treatment. The purpose of this utility model is to A sewage treatment system is provided.

In order to achieve the above purpose, the utility model specifically adopts the following technical solutions: a sewage treatment system, including a water inlet pipe, a primary treatment device, a secondary treatment device and a tertiary treatment device, and the primary treatment device communicates with the first water delivery pipe The secondary processing device communicates with the tertiary processing device through a second water delivery pipe, and the first water delivery pipe and the second water delivery pipe are respectively provided with a first water pump and a second water delivery pipe. Two water pumps, the primary treatment device includes a filter cartridge, the outer periphery of the filter cartridge is provided with a casing, a cavity is formed between the filter cartridge and the casing, and the water inlet pipe extends into the filter cartridge, so A plurality of first through holes are arranged on the outer periphery of the filter cartridge, and at least one layer of first filter net is arranged in the cavity close to the first water delivery pipe.

Working principle: Add sewage to be treated into the filter cartridge through the water inlet pipe, and start the first water pump at the same time. The first water delivery pipe enters the secondary treatment device, and after the biological decomposition of organic matter is completed in the secondary treatment device, it enters the third-level treatment device through the second water delivery pipe under the action of the second water pump, and after deep purification is completed in the third-level treatment tank Finished. Through the setting of the filter cartridge, at least one layer of the first filter screen and the first water pump, the sewage can remove sludge and other precipitated impurities in the primary treatment device, and the impurity removal effect is good. Because the first filter screen is installed vertically, the sewage The mud will not block the first filter screen, and the impurity removal effect is good, which is beneficial to the secondary and tertiary treatment in the later stage, and solves the problem that the filter layer in the primary treatment in the existing sewage treatment system is prone to blockage and the water flow will be blocked. Mixed with a certain amount of precipitated impurities, it will directly affect the defects of the subsequent secondary and tertiary treatment.

Further, the lower part of the filter cartridge is provided with a funnel-shaped sludge tank, the bottom of the filter cartridge is provided with a first sewage outlet, the filter cartridge is provided with a rotating shaft, and the top of the rotating shaft extends to the filter cartridge The outer side of the rotating shaft is provided with a first motor, the rotating shaft in the filter cartridge is provided with a scraper, and the bottom of the rotating shaft is provided with a scraper, and the scraper covers the first sewage outlet, so A sewage discharge tube is provided at the bottom of the sludge pool, and a second valve is provided on the sewage discharge tube. After the filtered water is discharged, the sludge remains on the bottom of the filter cartridge and the first filter screen, the first motor is started and the rotating shaft is driven to rotate, and the rotation of the rotating shaft makes the scraper and the first sewage outlet staggered, and the sludge is discharged from the first sewage outlet in the It flows down into the sludge tank under the action of gravity, and the scraper also plays the role of scraping the sludge to prevent the clogging of the sewage outlet. The scraper scrapes the sludge adhering to the inner wall of the filter cartridge into the filter cartridge to prevent the filter cartridge from clogging. There is at least one first sewage outlet at the bottom of the filter cartridge, preferably two, the number of scrapers is the same as that of the first sewage outlet, and the scrapers can completely cover the first sewage outlet.

Furthermore, a sewage discharge pipe is provided on the lower side of each of the first filter screens, and a first valve is provided on the sewage discharge pipe, and the sewage discharge pipe is located in the sludge pool. It is used to discharge the sludge at the bottom of the first filter to prevent the first filter from clogging, and the filtering effect is better.

Further, two support plates are arranged in the secondary treatment device, and the support plates divide the secondary treatment device into an upper anaerobic chamber, a middle aerobic chamber and a lower anoxic chamber, each A plurality of second through holes are arranged on each of the supporting plates, and a pulling plate is arranged on the lower part of each supporting plate, and a third through hole communicating with or staggered with the second through holes is arranged on the pulling plate, and each The two pull plates extend to the outside of the secondary treatment device, the end of the pull plate outside the secondary treatment device is provided with a second motor, the aerobic chamber is provided with an oxygen supply mechanism, and the aerobic chamber is provided with an oxygen supply mechanism. The side wall of the aerobic chamber is provided with a first ventilation window, the upper part of the support plate in the aerobic chamber is provided with a second filter screen, and the upper part of the side wall of the anoxic chamber is provided with a second ventilation window, so A cover is provided outside the ventilation window, and a lifting drive mechanism is provided at the bottom of the cover. Start the second motor so that the third through hole is completely staggered from the second through hole, and the water from the first water delivery pipe enters the anaerobic chamber first, and there are phosphorus accumulating bacteria in the anaerobic chamber. Phosphorus is released under the action, and then the second motor drives the pull plate at the bottom of the anaerobic chamber to stagger the second through hole and the third through hole, and the water in the anaerobic chamber flows into the aerobic chamber under the action of gravity. Oxygen is provided to the aerobic chamber, and phosphorus-accumulating bacteria absorb phosphorus in the aerobic state, and remain on the second filter in the form of excess sludge. At the same time, organic nitrogen is decomposed into ammonia nitrogen by nitrifying bacteria in the aerobic chamber, and ammonia nitrogen further It is transformed into nitrate nitrogen, and then the water in the aerobic chamber enters the anoxic chamber under the action of gravity. Under anoxic conditions, the nitrate nitrogen is reduced to nitrogen overflow by denitrifying bacteria, so as to achieve the purpose of denitrification; the first ventilation The window plays the role of ventilation and balancing the pressure inside the aerobic chamber and the outside world. The second ventilation window, the cover and the driving mechanism jointly create an anoxic environment; through the setting of anaerobic chamber, aerobic chamber and anoxic chamber from top to bottom, The water that completes the upper process directly enters the lower part for treatment under the action of gravity, the equipment occupies a small area, reduces the use of pumps, and is energy-saving and environmentally friendly.

Further, the oxygen supply mechanism includes an oxygen supply box, and the oxygen supply box communicates with the aerobic chamber through an oxygen supply pipe, and the oxygen supply pipe in the aerobic chamber is provided with a plurality of small holes , the oxygen supply pipe outside the secondary treatment device is provided with a fan and a sixth valve. Open the sixth valve, and under the action of the fan, the oxygen in the oxygen supply box is input into the aerobic chamber through the oxygen supply pipe and the small hole to provide oxygen for the aerobic chamber.

Furthermore, the lifting drive device includes a telescopic rod located at the bottom of the cover and a third motor located at the bottom of the telescopic rod. The third motor drives the telescopic rod to expand or contract upwards or downwards, so that the cover covers the second ventilation window or leaves the second ventilation window, so that air can enter or not enter the anoxic cavity, thereby creating an anoxic environment.

Furthermore, a bracket is provided at the bottom of the third motor. The bracket supports the third motor.

Furthermore, a second sewage outlet is provided on one side of the second filter screen. The second sewage outlet is used to discharge the remaining sludge.

Further, the tertiary treatment device is provided with a stirring mechanism, the top of the tertiary treatment device is provided with a dosing port, the bottom of the tertiary treatment device is provided with a water outlet pipe, and the water outlet pipe is provided with a second Five valves. Add sodium hypochlorite from the dosing port, sterilize and disinfect the water body under the agitation of the stirring mechanism, and then discharge it from the outlet pipe.

Further, the stirring mechanism includes a stirring rod and a stirring blade located on the stirring rod, the top of the stirring rod extends to the outside of the top of the tertiary processing device, and the top of the stirring rod is provided with a fourth motor . The fourth motor drives the stirring rod to rotate, and the stirring rod drives the stirring blades to stir the water body, so that the sodium hypochlorite can fully contact the water body, and the disinfection effect is good.

The beneficial effects of the utility model are as follows: (1) through the setting of the filter cartridge, at least one layer of the first filter screen and the first water pump, the sewage can remove sludge and other precipitated impurities in the primary treatment device, and the impurity removal effect is good. Because the first filter is installed vertically, the sludge will not block the first filter, and the impurity removal effect is good, which is beneficial to the secondary and tertiary treatment in the later stage; (2) After the filtered water is discharged, the sludge remains in the The filter cartridge and the bottom of the first filter screen start the first motor and drive the rotating shaft to rotate. The rotation of the rotating shaft makes the scraper and the sewage outlet stagger, and the sludge flows from the sewage outlet to the sludge pool under the action of gravity, and the scraper also scrapes the sewage The mud prevents the blockage of the sewage outlet. The scraper scrapes the sludge adhered to the inner wall of the filter cartridge into the filter cartridge to prevent the filter cartridge from being blocked; (3) The sewage pipe is used to discharge the sludge at the bottom of the first filter to prevent the first The filter screen is blocked, and the filtering effect is better; (4) Through the setting of anaerobic chamber, aerobic chamber and anoxic chamber from top to bottom, the water that completes the upper process can directly enter the lower part for treatment under the action of gravity, and the equipment occupies an area The area is small, reducing the use of pumps, energy saving and environmental protection; (5) Add sodium hypochlorite from the dosing port, sterilize and disinfect the water body under the stirring of the stirring mechanism, and then discharge it from the outlet pipe.

Description of drawings

Fig. 1 is the structural diagram of a kind of sewage treatment system described in the application;

Fig. 2 is a transverse sectional view of the filter cartridge shown in Fig. 1 .

Reference signs: 1-first-level treatment device, 2-second-level treatment device, 3-tertiary treatment device, 4-first water delivery pipe, 5-second water delivery pipe, 6-third valve, 7-first water pump , 8-fourth valve, 9-second water pump, 10-filter cartridge, 11-housing, 12-first through hole, 13-rotating shaft, 14-first motor, 15-scraper, 16-scraper, 17 -The first filter screen, 18-the sewage pipe, 19-the first valve, 20-anaerobic chamber, 21-aerobic chamber, 22-anoxic chamber, 23-pulling plate, 24-second motor, 25-support plate , 26-the third through hole, 27-the first ventilation window, 28-oxygen box, 29-oxygen pipe, 30-fan, 31-the sixth valve, 32-small hole, 33-the second filter, 34 -Second sewage outlet, 35-Second ventilation window, 36-Cover, 37-Telescopic rod, 38-Third motor, 39-Bracket, 40-Stirring rod, 41-Fourth motor, 42-Stirring blade, 43- Outlet pipe, 44-fifth valve, 45-inlet pipe, 46-sludge tank, 47-drainage tank, 48-second valve, 49-second through hole, 50-first sewage outlet, 51-dosing port .

Detailed ways

In order for those skilled in the art to better understand the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and the following embodiments.

Example 1

As shown in Figure 1, a sewage treatment system includes a water inlet pipe 45, a primary treatment device 1, a secondary treatment device 2 and a tertiary treatment device 3, and the primary treatment device 1 communicates with the first water delivery pipe 4 through the The secondary treatment device 2 is connected, and the secondary treatment device 2 is communicated with the tertiary treatment device 3 through the second water delivery pipe 5, and the first water delivery pipe 4 and the second water delivery pipe 5 are respectively provided with The first water pump 7 and the second water pump 9, the primary treatment device 1 includes a filter cartridge 10, the outer periphery of the filter cartridge 10 is provided with a casing 11, and a cavity is formed between the filter cartridge 10 and the casing 11, The water inlet pipe 45 extends into the filter cartridge 10, a plurality of first through holes 12 are provided on the outer periphery of the filter cartridge 10, and at least one Layer first filter screen 17.

Working principle: add sewage to be treated into the filter cartridge 10 through the water inlet pipe 45, and start the first water pump 7 at the same time, the sewage will enter the cavity formed by the filter cartridge 10 and the shell 11 after passing through the filter cartridge 10, and then pass through at least one layer The first filter screen 17 enters the secondary treatment device 2 from the first water delivery pipe 4, and enters the tertiary treatment through the second water delivery pipe 5 under the action of the second water pump 9 after completing the biological decomposition of organic matter in the secondary treatment device 2 Device 3, after the deep purification is completed in the tertiary treatment box, the treatment is completed. Through the setting of the filter cartridge 10, at least one layer of the first filter screen 17 and the first water pump 7, the sewage can remove sludge and other precipitated impurities in the primary treatment device 1, and the impurity removal effect is good, because the first filter screen 17 is vertical It is arranged in the opposite direction, so the sludge will not block the first filter screen 17, and the impurity removal effect is good, which is beneficial to the secondary and tertiary treatment in the later stage, and solves the problem of easy filtration of the filter layer in the primary treatment in the above-mentioned existing sewage treatment system. Blockage occurs and certain precipitated impurities will be mixed in the water flow, resulting in defects that directly affect the subsequent secondary and tertiary treatment.

The first water delivery pipe 4 is provided with a third valve 6 , and the second water delivery pipe 5 is provided with a fourth valve 8 .

Example 2

Based on Embodiment 1, as shown in Figures 1-2, the bottom of the filter cartridge 10 is provided with a funnel-shaped sludge tank 46, the bottom of the filter cartridge 10 is provided with a first sewage outlet 50, and the filter cartridge 10 A rotating shaft 13 is arranged inside, the top of the rotating shaft 13 extends to the outside of the filter cartridge 10, the top of the rotating shaft 13 is provided with a first motor 14, and the rotating shaft 13 in the filter cartridge 10 is provided with a scraper 16, so The bottom of the rotating shaft 13 is provided with a scraper 15, the scraper 15 covers the first sewage outlet 50, the bottom of the sludge tank is provided with a sewage discharge tube 47, and the sewage discharge tube 47 is provided with a second valve 48.

After the filtered water is discharged, the sludge remains on the bottom of the filter cartridge 10 and the first filter screen 17, the first motor 14 is started and the rotating shaft 13 is driven to rotate, and the rotating shaft 13 rotates so that the scraper 15 and the first sewage outlet 50 are staggered, and the sewage Mud flows from the first sewage outlet 50 into the sludge pool 46 under the action of gravity, and the scraper 15 also plays the role of scraping the sludge to prevent the sewage outlet from being blocked. The scraper 16 scrapes the sludge adhered to the inner wall of the filter cartridge 10 to In the filter cartridge 10, prevent the filter cartridge 10 from clogging.

There is at least one first sewage outlet 50 at the bottom of the filter cartridge 10 , preferably two. The number of scrapers 15 is the same as that of the first sewage outlets 50 , and the scrapers 15 can completely cover the first sewage outlets 50 .

Example 3

Based on Embodiment 1, as shown in Figure 1, a sewage discharge pipe 18 is provided on the lower side of each first filter screen 17, and a first valve 19 is arranged on the sewage discharge pipe 18, and the sewage discharge pipe 18 is located at the In the sludge pool 46 described above.

It is used to discharge the sludge at the bottom of the first filter screen 17 to prevent the first filter screen 17 from clogging, and the filtering effect is better.

Example 4

Based on embodiment 1, as shown in Figure 1, two support plates 25 are arranged in the described secondary treatment device 2, and described support plate 25 divides described secondary treatment device 2 into the anaerobic chamber 20 of upper part, middle part. The aerobic chamber 21 and the anoxic chamber 22 of the lower part, each of the support plates 25 is provided with a plurality of second through holes 49, and the bottom of each of the support plates 25 is provided with a pull plate 23, the pull plate 23 The plate 23 is provided with a third through hole 26 communicating with or staggered with the second through hole 49, each of the pulling plates 23 extends to the outside of the secondary processing device 2, and all the outside of the secondary processing device 2 The end of the pull plate 23 is provided with a second motor 24, the aerobic chamber 21 is provided with an oxygen supply mechanism, the side wall of the aerobic chamber 21 is provided with a first ventilation window 27, and the aerobic chamber 21 The upper part of the inner support plate 25 is provided with a second filter screen 33, the upper part of the side wall of the anoxic chamber 22 is provided with a second ventilation window 35, the outer side of the ventilation window is provided with a cover 36, and the bottom of the cover 36 is A lifting drive mechanism is provided.

Start the second motor 24 so that the third through hole 26 and the second through hole 49 are completely staggered, and the water coming out from the first water delivery pipe 4 first enters the anaerobic chamber 20, and there are phosphorus-accumulating bacteria in the anaerobic chamber 20. , phosphorus is released under the action of phosphorus accumulating bacteria, and then the second motor 24 drives the pull plate 23 at the bottom of the anaerobic chamber 20 so that the second through hole 49 and the third through hole 26 are staggered, and the water in the anaerobic chamber 20 is under gravity The action flows down into the aerobic chamber 21, and the oxygen supply mechanism provides oxygen to the aerobic chamber 21. Under the aerobic state, the phosphorus-accumulating bacteria absorb phosphorus and stay on the second filter screen 33 in the form of excess sludge. In the aerobic chamber 21, the organic nitrogen is decomposed by nitrifying bacteria into ammonia nitrogen, and the ammonia nitrogen is further converted into nitrate nitrogen. After that, the water in the aerobic chamber 21 enters the anoxic chamber 22 under the action of gravity. Under anoxic conditions, the nitrate nitrogen The denitrifying bacteria reduce it to nitrogen overflow, thereby achieving the purpose of denitrification; the first ventilation window 27 plays the role of ventilation and balancing the pressure in the aerobic chamber 21 and the outside world, and the second ventilation window 35, the cover 36 and the driving mechanism jointly create a gap. Oxygen environment; through the setting of anaerobic chamber 20, aerobic chamber 21 and anoxic chamber 22 from top to bottom, the water that completes the upper process can directly enter the lower part for treatment under the action of gravity, and the equipment occupies a small area and reduces the need for pumps. The use of energy saving and environmental protection.

Example 5

Based on Embodiment 1, as shown in FIG. 1 , the oxygen supply mechanism includes an oxygen supply box 28, and the oxygen supply box 28 communicates with the aerobic chamber 21 through an oxygen supply pipe 29. The oxygen supply pipe 29 is provided with a plurality of small holes 32 , and the oxygen supply pipe 29 outside the secondary treatment device 2 is provided with a fan 30 and a sixth valve 31 .

Open the sixth valve 31, and under the action of the fan 30, the oxygen in the oxygen supply box 28 is input into the aerobic chamber 21 through the oxygen supply pipe 29 and the small hole 32, so as to provide oxygen in the aerobic chamber 21.

Example 6

Based on Embodiment 1, as shown in FIG. 1 , the lifting drive device includes a telescopic rod 37 at the bottom of the cover 36 and a third motor 38 at the bottom of the telescopic rod 37 .

The third motor 38 drives the telescopic rod 37 to expand or contract upwards or downwards, so that the cover 36 covers the second louver 35 or leaves the second louver 35, so that air can enter or not enter the anoxic chamber 22, thereby creating an anoxic environment.

Example 7

Based on Embodiment 1, as shown in FIG. 1 , a bracket 39 is provided at the bottom of the third motor 38 .

The bracket 39 supports the third motor 38 .

Example 8

Based on Embodiment 1, as shown in FIG. 1 , a second sewage outlet 34 is provided on one side of the second filter 33 .

The second sewage outlet 34 is used to discharge the remaining sludge.

Example 9

Based on Embodiment 1, as shown in Figure 1, a stirring mechanism is arranged in the described tertiary processing device 3, the top of the described tertiary processing device 3 is provided with a dosing port 51, and the bottom of the described tertiary processing device 3 is provided with There is a water outlet pipe 43, and a fifth valve 44 is arranged on the water outlet pipe 43.

Sodium hypochlorite is added from the dosing port 51, and the water body is sterilized under the stirring of the stirring mechanism, and then discharged from the water outlet pipe 43.

Example 10

Based on Embodiment 1, as shown in Figure 1, the stirring mechanism includes a stirring rod 40 and a stirring blade 42 positioned on the stirring rod 40, and the top of the stirring rod 40 extends to the top of the tertiary treatment device 3 Outside, the top of the stirring rod 40 is provided with a fourth motor 41 .

The fourth motor 41 drives the stirring rod 40 to rotate, and the stirring rod 40 drives the stirring blade 42 to stir the water body, so that the sodium hypochlorite can fully contact the water body, and the disinfection effect is good.

Those in the technical field should understand that the first motor 14, the second motor 24, the third motor 38, the fourth motor 41, the first water pump 7 and the second water pump 9 described in this solution all belong to the prior art It is required to purchase products of different models and specifications in the market. For example, in the utility model, the models of the first motor, the second motor, the third motor and the fourth motor are all Y-180L-8, and the first water pump and the second The models of the water pumps are all WNY600.

The above are the main features and beneficial effects of this program. Those skilled in the art should understand that this program is not limited by the above-mentioned embodiments. What is described in the above-mentioned embodiments and instructions is only to illustrate the principle of this program, without departing from this program. Under the premise of the spirit and scope, this program also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention, and the protection scope of this program is defined by the appended claims and their equivalents defined.

In the description of the present utility model, it should also be noted that, unless otherwise specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection , can also be disassembled connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be connected through an intermediary medium, and can 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 utility model according to specific situations.

Claims (10)

1. at a kind of sewage disposal system, including water inlet pipe (45), coagulation device (1), two stage treatment device (2) and three-level It manages device (3), which is characterized in that the coagulation device (1) passes through the first water-supply-pipe (4) and the two stage treatment device (2) it being connected to, the two stage treatment device (2) is connected to by the second water-supply-pipe (5) with the tertiary treatment device (3), and described the The first water pump (7) and the second water pump (9) are respectively arranged on one water-supply-pipe (4) and second water-supply-pipe (5), at the level-one Managing device (1) includes filter cylinder (10), and the periphery of the filter cylinder (10) is provided with shell (11), the filter cylinder (10) and the shell (11) cavity is formed between, the water inlet pipe (45) extends in the filter cylinder (10), is arranged on the periphery of the filter cylinder (10) There are multiple first through hole (12), at least one layer of first filter screen is provided in the cavity of first water-supply-pipe (4) (17)。

2. a kind of sewage disposal system according to claim 1, which is characterized in that the lower part of the filter cylinder (10) is provided with The bottom of funnel shaped sludge-tank (46), the filter cylinder (10) is provided with the first sewage draining exit (50), setting in the filter cylinder (10) Have shaft (13), the outside of the filter cylinder (10) is extended at the top of the shaft (13), the is provided at the top of the shaft (13) One motor (14) is provided with scraping blade (16) in the shaft (13) in the filter cylinder (10), and the bottom of the shaft (13) is provided with Scraper plate (15), the scraper plate (15) cover first sewage draining exit (50), and the bottom of the sludge-tank (46) is provided with blowdown Cylinder (47) is provided with the second valve (48) on the pollutant discharge tube (47).

3. a kind of sewage disposal system according to claim 2, which is characterized in that the lower part of each first filter screen (17) Side is provided with sewage pipe (18), is provided with the first valve (19) on the sewage pipe (18), and the sewage pipe (18) is located at institute It states in sludge-tank (46).

4. a kind of sewage disposal system according to claim 1, which is characterized in that set in the two stage treatment device (2) Set there are two support plate (25), the support plate (25) the two stage treatment device (2) is separated into top anaerobic cavity (20), The aerobic cavity (21) at middle part and the anoxic chamber (22) of lower part are provided with multiple second through-holes on each support plate (25) (49), the lower part of each support plate (25) is provided with pulling plate (23), is provided with and the second through-hole on the pulling plate (23) (49) third through-hole (26) for communicating or being staggered, each pulling plate (23) extend to the outside of the two stage treatment device (2), The pulling plate (23) end on the outside of the two stage treatment device (2) is provided with the second motor (24), in the aerobic cavity (21) It is provided with oxygen supply mechanism, is provided with the first vent window (27) on the side wall of the aerobic cavity (21), the interior institute of aerobic cavity (21) The top for stating support plate (25) is provided with the second filter screen (33), and the side wall upper part of the anoxic chamber (22) is provided with the second ventilation Window (35) is provided with cover (36) on the outside of the vent window, and cover (36) bottom is provided with lift drive mechanism.

5. a kind of sewage disposal system according to claim 4, which is characterized in that the oxygen supply mechanism includes oxygen supply case (28), the oxygen supply case (28) is connected to by oxygen supplying tube (29) with the aerobic cavity (21), described in the aerobic cavity (21) It is provided on oxygen supplying tube (29) multiple apertures (32), is arranged on the oxygen supplying tube (29) on the outside of the two stage treatment device (2) There are blower (30) and the 6th valve (31).

6. a kind of sewage disposal system according to claim 4, which is characterized in that the lifting drive includes being located at The telescopic rod (37) of cover (36) bottom and the third motor (38) for being located at the telescopic rod (37) bottom.

7. a kind of sewage disposal system according to claim 6, which is characterized in that third motor (38) the bottom setting There are bracket (39).

8. a kind of sewage disposal system according to claim 4, which is characterized in that the side of second filter screen (33) It is provided with the second sewage draining exit (34).

9. a kind of sewage disposal system according to claim 1, which is characterized in that set in the tertiary treatment device (3) It is equipped with rabbling mechanism, is provided with dosing mouth (51) at the top of the tertiary treatment device (3), the tertiary treatment device (3) Bottom is provided with outlet pipe (43), is provided with the 5th valve (44) on the outlet pipe (43).

10. a kind of sewage disposal system according to claim 9, which is characterized in that the rabbling mechanism includes stirring rod (40) and the stirring blade (42) that is located on the stirring rod (40), the three-level is extended at the top of the stirring rod (40) The top outer of processing unit (3) is provided with the 4th motor (41) at the top of the stirring rod (40).