CN112279471A

CN112279471A - Integral type sewage treatment unit

Info

Publication number: CN112279471A
Application number: CN202011311959.9A
Authority: CN
Inventors: 张敬宇; 宋超; 唐陆合; 王刚; 谷秋磊; 赵云生
Original assignee: Beijing Huayu Huihuang Ecological Environmental Protection Technology Co ltd
Current assignee: Beijing Huayu Huihuang Ecological Environmental Protection Technology Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-01-29

Abstract

The invention provides an integrated domestic sewage treatment device, relates to the technical field of sewage treatment equipment, and solves the technical problems that the sludge concentration is difficult to further improve and the synchronous nitrogen and phosphorus removal effect is limited in the traditional sewage treatment process in the prior art. The device comprises a shell, wherein an anoxic tank unit, an anaerobic tank unit, an aerobic tank unit, a secondary sedimentation tank unit, a safety filter tank unit and a device room are sequentially arranged in the shell, and the anoxic tank unit is arranged on the front side of the anaerobic tank unit and communicated with the anaerobic tank unit; the anaerobic tank unit is arranged at the front side of the aerobic tank unit and communicated with the aerobic tank unit; the secondary sedimentation tank unit is arranged in the aerobic tank unit and communicated with the aerobic tank unit; the safety filter unit is arranged at the rear side of the aerobic tank unit and communicated with the secondary sedimentation tank unit; the equipment room is arranged at the tail end of the safe filter unit. The sewage treatment device of the invention improves the contradiction of the traditional sludge method, ensures that the sludge concentration of the mixture is high, improves the denitrification and dephosphorization effect, and ensures that the effluent reaches the standard.

Description

Integral type sewage treatment unit

Technical Field

The invention relates to the technical field of sewage treatment equipment, in particular to an integrated domestic sewage treatment device.

Background

At present, in the field of sewage treatment, a traditional AAO process (anaerobic-anoxic-aerobic process) is a commonly used sewage treatment process, can be used for secondary sewage treatment or tertiary sewage treatment and reclaimed water reuse, and has certain denitrification and dephosphorization effects. The traditional AAO process (anaerobic-anoxic-aerobic process) is widely applied to the field of water treatment, the process flow is simple, three environments of anaerobic, anoxic and aerobic are operated alternately, and organic matters, nitrogen and phosphorus can be removed simultaneously. After sewage treatment by using the AAO process passes through the aerobic tank, sewage mixed liquor enters a secondary sedimentation tank, supernatant liquid is overflowed and discharged outside after solid-liquid separation, sludge enters a mud bucket of the secondary sedimentation tank, and the sludge in the secondary sedimentation tank must flow back to supplement the sludge in the aerobic tank, which is determined by the process characteristics of the traditional activated sludge method. However, the sludge reflux ratio cannot be increased, the denitrification internal circulation amount is generally limited to 2Q and is not too high, so that the sludge concentration of an aerobic tank in the traditional AAO process has a certain limit value. In the traditional process, various denitrification and dephosphorization microorganisms coexist in the same sludge system, but the denitrification bacteria and the dephosphorization bacteria have different requirements on the concentration of dissolved oxygen, the age of sludge, the types and the concentration of nutrients, so that the system has contradictions. The contradiction is that the traditional activated sludge process cannot simultaneously ensure that each functional bacterium becomes a dominant bacterium, and the overall treatment effect of the system is influenced.

In the market, the sewage integration equipment adopting the traditional activated sludge process is difficult to improve the phosphorus removal effect, and the contradiction between the nitrogen removal mechanism and the phosphorus removal mechanism is not solved positively, so that the synchronous nitrogen and phosphorus removal effect cannot be balanced. The treated water entering the sedimentation tank needs to keep dissolved oxygen with certain concentration, so that the retention time is reduced, the anaerobic state is prevented, and the phenomenon that the sludge releases phosphorus is avoided, but the concentration of the dissolved oxygen is not too high so as to prevent the interference of the circulating mixed liquid to the anaerobic reactor.

Disclosure of Invention

The invention aims to provide an integrated domestic sewage treatment device to solve the technical problems that the sludge concentration of the traditional sewage treatment process is difficult to further improve and the synchronous nitrogen and phosphorus removal effect is limited in the prior art. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides an integrated domestic sewage treatment device which comprises a shell, wherein an anoxic tank unit, an anaerobic tank unit, an aerobic tank unit, a secondary sedimentation tank unit, a safety filter tank unit and a device room are sequentially arranged in the shell, wherein the anoxic tank unit is arranged on the front side of the anaerobic tank unit and communicated with the anaerobic tank unit; the anaerobic tank unit is arranged at the front side of the aerobic tank unit and communicated with the aerobic tank unit; the secondary sedimentation tank unit is arranged in the aerobic tank unit and communicated with the aerobic tank unit; the safety filter unit is arranged at the rear side of the aerobic tank unit and communicated with the secondary sedimentation tank unit; the equipment room is arranged at the tail end of the safe filter chamber unit.

According to a preferred embodiment, a first water inlet and an overflow port are arranged on the side wall of the anoxic pond unit, wherein a dosing point position is arranged on the inner side of the first water inlet;

an anoxic tank filler and first stirring equipment are arranged in the anoxic tank unit; and a movable cover plate is arranged on the top shell of the anoxic pond unit.

According to a preferred embodiment, a water passing hole for communicating the anoxic pond unit and the anaerobic pond unit is arranged between the anoxic pond unit and the anaerobic pond unit;

a second water inlet is formed in the side wall of the anaerobic tank unit; an anaerobic tank filler and second stirring equipment are arranged in the anaerobic tank unit; and a movable cover plate is arranged on the top shell of the anaerobic tank unit.

According to a preferred embodiment, a water passing hole for communicating the anaerobic tank unit and the aerobic tank unit is arranged between the anaerobic tank unit and the aerobic tank unit;

the side wall of the aerobic tank unit is provided with an evacuation port, and an aerobic tank filler and an aeration component are arranged in the aerobic tank unit, wherein the aeration component comprises an air pipe and an aeration accessory, the air pipe extends from the top of the aerobic tank unit to the bottom of the aerobic tank unit, and the aeration accessory is arranged at the bottom of the aerobic tank unit and communicated with the air pipe.

According to a preferred embodiment, the secondary sedimentation tank unit is internally provided with an inclined plate filler, a clear water area is formed above the inclined plate filler, a sedimentation area is formed below the inclined plate filler, the bottom of the secondary sedimentation tank unit is provided with a mud bucket which is arranged inwards in an inclined manner from top to bottom, and the inclined angles of the mud buckets on different side walls of the secondary sedimentation tank unit are different; and a mud return port is arranged below the mud bucket of the secondary sedimentation tank unit, the mud return port is of an open structure, and a certain space is reserved between the mud return port and the bottom of the aerobic tank unit.

According to a preferred embodiment, the top of the clean water zone of the secondary sedimentation tank unit is provided with an effluent weir, the side wall of the secondary sedimentation tank unit is provided with an operation window at a position close to the inclined plate filler, and the top shell of the aerobic tank unit and the shell above the secondary sedimentation tank unit are both provided with movable cover plates.

According to a preferred embodiment, a clean water chamber and a filter chamber are arranged in the safe filter chamber unit, wherein the clean water chamber and the filter chamber are separated by a dome plate, and a clean water pipe for communicating the bottom of the filter chamber with the clean water chamber is arranged in the filter chamber; and a water outlet is formed in the top of the clear water chamber.

According to a preferred embodiment, a central cylinder is fixed in the filtering chamber and is communicated with the filtering chamber, a water inlet pipe is arranged in the central cylinder, a water inlet of the water inlet pipe is communicated with a water outlet weir of a secondary sedimentation tank unit, and the tail end of the water inlet pipe penetrates through a bottom plate of the central cylinder and extends into the filtering chamber; a water distributor is arranged in the filtering chamber and below the water inlet pipe;

a backwashing pump, a drain pipe and a backwashing gas pipe are further arranged in the central cylinder, the backwashing gas pipe extends from the top of the central cylinder to the bottom of the filtering chamber, and a gas backwashing fitting is arranged at the bottom of the filtering chamber; the gas backwashing fitting is communicated with the backwashing gas pipe; an electromagnetic valve is arranged on the backwashing air pipe;

the bottom of the filter chamber is provided with a filter plate, the bottom of the filter plate is fixedly connected with the bottom of the shell through a filter plate support, and the gas backwashing fitting and the filter material layer are sequentially arranged above the filter plate.

According to a preferred embodiment, a discharge port is arranged on a partition wall between the safety filter unit and the equipment room and positioned on the side wall of the filter chamber, and a water production port is arranged on the side wall of the equipment room.

According to a preferred embodiment, a dosing device, an ultraviolet disinfection device, a fresh air system, air equipment and a control system are further arranged in the equipment room; the dosing device is communicated with a dosing point position of the anoxic tank unit through a pipeline; the ultraviolet disinfection device is respectively communicated with the water outlet and the water production port of the safe filter unit; the reclaimed water is disinfected and then discharged through the water producing port; the air equipment is respectively communicated with the air pipe and the backwashing air pipe; the control system is connected with the air equipment, the first stirring equipment, the second stirring equipment, the dosing device, the fresh air system, the electromagnetic valve on the backwashing air pipe, the backwashing pump and the liquid level meter in the central cylinder.

Based on the technical scheme, the integrated domestic sewage treatment device at least has the following technical effects:

the invention improves the contradiction of the traditional activated sludge process in the positive direction by arranging the anoxic tank unit, the anaerobic tank unit, the aerobic tank unit, the secondary sedimentation tank unit, the safety filter tank unit and the equipment room in sequence in the shell and arranging the anoxic tank unit at the front side of the system; the secondary sedimentation tank unit is arranged in the aerobic tank unit and communicated with the aerobic tank unit, so that sludge can conveniently flow back to the aerobic tank, the types of microorganisms are increased, the sludge concentration of the mixture is higher, and the nitrogen and phosphorus removal effect is improved. The safety filter unit is arranged at the rear side of the aerobic tank unit and communicated with the secondary sedimentation tank unit; the treated reclaimed water SS is thoroughly removed through the safety filter unit, and the effluent is guaranteed to reach the standard. The integrated domestic sewage treatment device can greatly save energy consumption, solves the problems that the sludge concentration in the device of the traditional activated sludge process cannot be further improved and the denitrification and dephosphorization effects are poor, and also solves the defects of multiple devices and high energy consumption.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a plan view of an integrated domestic sewage treatment apparatus according to the present invention;

FIG. 2 is a front view of the integrated domestic sewage treatment apparatus of the present invention;

FIG. 3 is a front view of an aerobic tank of the integrated domestic sewage treatment apparatus of the present invention;

FIG. 4 is a front view of a safety filter unit of the integrated domestic sewage treatment apparatus of the present invention.

In the figure: 1-a shell; 2-equipment room; 3-an anoxic tank unit; 4-anaerobic tank unit; 5-an aerobic tank unit; 6-a secondary sedimentation tank unit; 7-a safety filter unit; 8-trachea; 8' -backwashing the gas pipe; 9-water passing port; 10-a first stirring device; 10' -a second stirring device; 11-an electromagnetic valve; 12-a clear water chamber; 13-filtering chamber; 14-backwash pump; 15-clear water pipe; 16-a dome plate; 17-a sewage draining pipe; 18-a central cartridge; 19-a removable cover plate; 201-a dosing device; 202-ultraviolet disinfection device; 203-a control system; 204-a fresh air system; 205-water producing port; 206-an air device; 301-a first water inlet; 302-dosing point location; 303-an overflow port; 304-anoxic pond packing; 401-a second water inlet; 402-anaerobic pool filling; 501-aeration fittings; 502-aerobic tank filling; 503-evacuation; 601-an operation window; 602-sloping plate packing; 603-a mud bucket; 604-mud return port; 605-an effluent weir; 701-a water outlet; 702-a discharge hole; 703-a filter material layer; 704-a filter plate; 705-filter plate holder; 706-water distributor; 707-a scaffold; 708-gas backwash fittings; 709-water inlet pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

As shown in figure 1, the invention provides an integrated domestic sewage treatment device, which comprises a shell 1, wherein an anoxic tank unit 3, an anaerobic tank unit 4, an aerobic tank unit 5, a secondary sedimentation tank unit 6, a safety filter tank unit 7 and an equipment room 2 are sequentially arranged in the shell 1. Wherein, the anoxic tank unit 3 is arranged at the front side of the anaerobic tank unit 4 and communicated with the anaerobic tank unit 4; the anaerobic tank unit 4 is arranged at the front side of the aerobic tank unit 5 and is communicated with the aerobic tank unit 5; the secondary sedimentation tank unit 6 is arranged in the aerobic tank unit 5 and communicated with the aerobic tank unit 5; the safety filter unit 7 is arranged at the rear side of the aerobic tank unit 5 and communicated with the secondary sedimentation tank unit 6; the equipment room 2 is arranged at the end of the safe filter unit 7. The integrated domestic sewage treatment device provided by the invention can directly return sludge to the aerobic tank by setting the secondary sedimentation tank arranged in the aerobic tank unit for efficient sedimentation, so that the sludge concentration of mixed liquid is higher due to the increase of the types of microorganisms, and the nitrogen and phosphorus removal effect is improved. Meanwhile, the anoxic tank is arranged in front, so that the contradiction of the traditional activated sludge process is improved positively; the SS is removed more thoroughly through the safety filter unit, and the effluent is guaranteed to reach the standard, so that the sewage treatment effect is improved.

Preferably, as shown in fig. 1 and 2, a first water inlet 301 and an overflow port 303 are provided on the side wall of the anoxic pond unit 3. Sewage enters the anoxic tank unit through the first water inlet 301. Preferably, a dosing point 302 is arranged inside the first water inlet 301. Phosphorus removal agents are added to the anoxic tank through the dosing site 302. Preferably, an anoxic tank filler 304 and a first stirring device 10 are further arranged in the anoxic tank unit 3, and the first stirring device promotes the anoxic environment to be formed in the anoxic tank and simultaneously prevents suspended sludge from sinking to the bottom. The suspended sludge is attached to the filler to grow into solid sludge, the sewage is subjected to denitrification reaction and degradation of partial organic matters in the anoxic tank unit, and nitrate nitrogen in the mixed liquid is converted into nitrogen to overflow the system. Preferably, an overflow port 303 is provided on a side wall of the anoxic tank unit 3, and when the liquid level exceeds the effective height due to an abnormal condition in the apparatus, the sewage may overflow through the overflow port. Preferably, a removable cover 19 for opening and closing the anoxic tank unit is provided on the top case of the anoxic tank unit 3 for easy observation and operation.

Preferably, a water passing hole 9 for communicating the anoxic tank unit 3 and the anaerobic tank unit 4 is arranged between the anoxic tank unit 3 and the anaerobic tank unit 4. The sewage enters the anaerobic tank unit 4 through the water gap 9. Preferably, a second water inlet 401 is arranged on the side wall of the anaerobic tank unit 4; the sewage enters the anoxic tank unit and the anaerobic tank unit through the first water inlet and the second water inlet in a segmented manner. Preferably, an anaerobic tank filler 402 and a second stirring device 10' are arranged inside the anaerobic tank unit 4; the second stirring device 10' is used for forming an anaerobic environment in the anaerobic tank, and simultaneously preventing suspended sludge from sinking to the bottom, so that the suspended sludge is attached to the filler to grow into fixed sludge. The sewage is subjected to hydrolysis and phosphorus release reaction of partial organic matters in the anaerobic tank. Meanwhile, a phosphorus removal agent is added at the dosing point of the anoxic tank unit, and chemical phosphorus removal is assisted along with the biochemical reaction. Preferably, a removable cover 19 is provided on the top case of the anaerobic tank unit 4 for easy observation and operation, and the removable cover is used to open or close the top of the anaerobic tank unit.

Preferably, a water passing hole 9 for communicating the anaerobic tank unit 4 with the aerobic tank unit 5 is arranged between the anaerobic tank unit 4 and the aerobic tank unit 5; the sewage enters the aerobic tank unit 5 through a water passing hole 9 between the anaerobic tank unit 4 and the aerobic tank unit 5. Preferably, a drain 503 is arranged on the side wall of the aerobic tank unit 5 and is used for draining the muddy water mixed liquid in the equipment. Preferably, the aerobic tank filling 502 and the aeration component are arranged in the aerobic tank unit 5. Preferably, the aerobic tank fill 502 can provide attachment points for the facultative sludge. Preferably, the aeration assembly comprises an air pipe 8 and an aeration fitting 501, wherein the air pipe 8 extends from the top of the aerobic tank unit 5 to the bottom thereof. Preferably, the air pipe 8 is communicated with air equipment in the equipment room 2 to provide an oxygen-enriched environment for the aerobic pool. Preferably, the aeration fitting 501 is arranged at the bottom of the aerobic tank unit 5 and is communicated with the air pipe 8. Preferably, the aeration fittings 501 can extend to the lower part of the mud return port of the secondary sedimentation tank unit so as to perform aeration operation on the bottom of the secondary sedimentation tank unit. The aerobic tank filler can block and break the tiny bubbles exposed by the aeration fittings, and the oxygen transfer efficiency and the biomembrane renewal rate are increased. The aerobic tank unit is internally provided with suspended aerobic sludge, and attached sludge is formed on the filler, so that the sludge concentration in the mixed liquid is greatly increased. The multiple microorganisms react together, and the degradation of most organic matters, the nitrification of organic nitrogen and ammonia nitrogen and the absorption of phosphorus occur in the aerobic tank. Preferably, a mixed liquid reflux device is further arranged in the aerobic tank unit. The mixed liquid reflux device comprises a reflux air pipe and a reflux pipe connected with the anoxic tank, wherein the reflux air pipe is connected with the reflux pipe, the reflux air pipe can be communicated with air equipment to provide power for the reflux pipe, and the reflux pipe enables nitrified liquid in the aerobic tank to flow back to the anoxic tank, so that the denitrification capacity of the system is enhanced.

Preferably, the secondary sedimentation tank unit 6 is in submerged communication with the aerobic tank. And after the sewage in the aerobic tank meets the retention time, the sewage enters a settling zone in the secondary settling tank unit. Preferably, an inclined plate filler 602 is arranged in the secondary sedimentation tank unit 6, and preferably, the inclined plate filler 602 is a hyperboloid inclined plate filler, and the filler has no gap and is integrally sealed and filled. Preferably, a clear water area is formed above the inclined plate filler 602, a settling area is formed below the inclined plate filler 602, sludge is settled or adsorbed on the surface of the filler under the blocking of the inclined plate filler, the adsorbed sludge gradually accumulates to reach a certain weight, is separated from the filler and sinks into a mud bucket, supernatant continuously overflows from the upper section of the inclined plate filler, overflows into an effluent weir, overflows into a secondary sedimentation tank unit, and mud-water mixed liquid gradually realizes solid-liquid separation. Preferably, the bottom of the secondary sedimentation tank unit 6 is provided with a mud bucket 603, the mud bucket 603 is arranged from top to bottom and inclines inwards, and the inclination angles of the mud buckets 603 on different side walls of the secondary sedimentation tank unit 6 are different; that is, the contained angle of the hopper wall of the hopper at the bottom of the secondary sedimentation tank and the horizontal plane is a plurality of different angles, so that the sedimentation of the sludge is convenient, the sludge caking is avoided, and the anaerobic area is generated to influence the sludge state and the effluent water quality. Preferably, a mud return port 604 is arranged below the mud bucket 603 of the secondary sedimentation tank unit 6. The mud returning port 604 is an open structure, and a certain space is formed between the mud returning port 604 and the bottom of the aerobic tank unit 5. So that the concentrated sludge that subsides in the bagger can directly flow back to good oxygen pond to be stirred evenly once more along with the turbulent flow mixed liquid in the good oxygen pond, constantly improve the mixed liquid concentration in good oxygen pond, mud backward flow need not pipeline and outer power equipment, can realize returning mud fast, improves system's activated sludge concentration.

Preferably, an effluent weir 605 is arranged at the top of the clean water zone of the secondary sedimentation tank unit 6, so that the clean water can flow out of the secondary sedimentation tank unit 6 through the effluent weir 605 and is communicated with the water inlet pipe of the safety filter. Preferably, an operation window 601 is arranged on the side wall of the secondary sedimentation tank unit 6 and close to the inclined plate filler 602, so that the filler and the mud bucket can be conveniently and manually maintained and cleaned, and the equipment can be conveniently cleaned off-line. Preferably, the aeration fittings at the bottom of the secondary sedimentation tank unit can be opened periodically to aerate the bottom of the secondary sedimentation tank, so that local anaerobic caused by sludge deposition is avoided. The secondary sedimentation tank is arranged in the aerobic tank, and the volume below the wall of the mud bucket is still the available volume of the aerobic tank, so that the whole space of the equipment is not wasted. Preferably, a removable cover plate 19 is arranged on the top shell of the aerobic tank unit 5. Preferably, a movable cover plate is also arranged on the top shell of the aerobic tank unit 5 and the shell positioned right above the secondary sedimentation tank unit 6, so as to facilitate the operation of the secondary sedimentation tank unit.

Preferably, the secondary sedimentation tank unit 6 is detachably connected with the aerobic tank unit 5, so that the secondary sedimentation tank unit 6 can be taken out from the aerobic tank unit 5 as an independent module to clean or replace the filler, the mud bucket, off-line cleaning equipment and the like. Preferably, a guide groove is formed in the side wall of the aerobic tank unit 5, a guide piece is arranged on the secondary sedimentation tank unit 6, the secondary sedimentation tank unit and the aerobic tank unit are connected by inserting the guide piece into the guide groove, and when the secondary sedimentation tank unit needs to be taken out, the secondary sedimentation tank unit is lifted upwards to separate the guide piece from the guide groove, so that the secondary sedimentation tank unit and the aerobic tank unit are separated.

Preferably, the water in the clean water area of the secondary sedimentation tank unit enters the filter chamber 13 of the safe filter tank through a water inlet pipe. The safe filter unit 7 is internally provided with a clean water chamber 12 and a filter chamber 13, wherein the clean water chamber 12 and the filter chamber 13 are separated by a dome plate 16. Preferably, the dome plate 16 forms a sealing connection with the inner wall of the safety filter. A clean water pipe 15 which communicates the bottom of the filtering chamber 13 with the clean water chamber 12 is arranged in the filtering chamber 13. A water outlet 701 is arranged at the top of the clean water chamber 12. Preferably, a central cylinder 18 is fixed in the filter chamber 13, and preferably, the central cylinder 18 is fixedly connected with the inner wall of the safe filter unit 7 through a bracket 707. Preferably, the central cartridge 18 is placed in communication with the filtering chamber 13. Preferably, the central cylinder 18 includes a bottom plate hollowed out to communicate with the filtering chamber 13 by the connection of the bottom plate to the dome plate 16, and the top of the central cylinder 18 is open. An inlet pipe 709 is arranged in the central cylinder 18, the inlet of the inlet pipe 709 is communicated with the outlet weir 605 of the secondary sedimentation tank unit 6, and the tail end of the inlet pipe 709 passes through the bottom plate of the central cylinder 18 and extends into the filtering chamber 13. Preferably, a water distributor 706 is arranged below the water inlet pipe 709 in the filtering chamber 13; so as to prevent the water inlet impact of the water inlet pipe entering the filtering chamber and relieve the water distribution, and prevent the filter material in the filtering chamber from being unevenly distributed. The inlet water is adsorbed and filtered through the filter material layer, substances such as residual colloid, SS (suspended substance), soluble organic substances and the like in the water are intercepted and adsorbed, and clarified reclaimed water rises through the clean water pipe and overflows into the clean water chamber and then overflows out of the safety filter tank from the water outlet.

Preferably, a backwash pump 14, a sewage discharge pipe 17 and a backwash air pipe 8' are further provided in the central cylinder 18. Preferably, the backwash pump 14 is disposed on the bottom plate of the central cylinder 18, the bottom of the sewage discharge pipe 17 is connected to the backwash pump 14, and the upper end of the sewage discharge pump 17 extends out of the top of the central cylinder 18. Preferably, the backwash air pipe 8' extends from the top of the central cylinder 18 to the bottom of the filtering chamber 13, and an air backwash fitting 708 is arranged at the bottom of the filtering chamber 13; the gas backwash fitting 708 is in communication with the backwash gas pipe 8'. Preferably, a filter plate 704 is arranged at the bottom of the filter chamber 13, the bottom of the filter plate 704 is fixedly connected with the bottom of the shell 1 through a filter plate bracket 705, and an air backwashing fitting 708 and a filter material layer 703 are arranged above the filter plate 704 in sequence. Preferably, a liquid level gauge is provided within the central cartridge 18. Preferably, the liquid level meter is a float ball liquid level meter. When the filter material working time of the safety filter tank is overlong and basically in an adsorption saturation state, the blockage degree of the filter material layer is continuously increased, the liquid level in the central cylinder is finally continuously increased, and when the liquid level in the central cylinder reaches a preset high liquid level, the liquid level meter for monitoring the liquid level in the central cylinder transmits a signal to the control system to control the start of a backwashing flow. The method comprises the steps of firstly starting primary gas washing, exposing gas from a gas backwashing accessory, flushing bubbles on the surface of a filter material to drive friction between filter material particles and particles, controlling starting secondary water washing after a set aeration time is reached, controlling starting of a backwashing pump, sucking waste liquid containing stripped impurities or biological membranes through a backwashing pipe discharge system, continuously refluxing water in a clean water chamber to a filter chamber, and continuously flushing impurities in gaps of the filter material. The waste liquid emptying is upward-flow reverse-pollution discharge, so that the loss of fine filter materials along with the waste liquid can be effectively avoided. When the liquid level meter monitors that the liquid level in the central cylinder reaches a preset low liquid level, the backwashing pump is controlled to stop running, the backwashing program of the system is finished, and the filtering system recovers the high-efficiency filtering work.

Preferably, a discharge port 702 is provided on a partition wall between the safe filter unit 7 and the equipment room 2 and on a side wall of the filter chamber 13. A water producing port 205 is arranged on the side wall of the equipment room 2. Preferably, a medicine adding device 201, an ultraviolet disinfection device 202, a fresh air system 204, an air device 206 and a control system 203 are further arranged in the equipment room 2. Wherein, the medicine adding device 201 is communicated with the medicine adding point phase of the anoxic tank unit through a pipeline so as to add the prepared liquid medicine into the anoxic tank unit. Preferably, the ultraviolet disinfection device 202 is respectively communicated with the water outlet 701 of the safe filter unit 7 and the water production port 205; so that the reclaimed water is disinfected and recycled or discharged through the water producing port 205. The fresh air system in the equipment room keeps the air in the equipment room dry and is beneficial to dissipating heat generated by the operation of mechanical equipment to maintain proper temperature. The control system is responsible for regulating and controlling the operation of all electromechanical equipment of the whole device and the automatic backwashing control of the safety filter tank. Preferably, the air device 206 is in communication with the air line 8 and the backwash air line 8', respectively. Preferably, the control system 203 is connected with the air device 206, the first stirring device 10, the second stirring device 10 ', the dosing device 201, the fresh air system 204, the electromagnetic valve 11 on the backwash air pipe 8', the backwash pump 14 and the liquid level meter in the central cylinder 18. So as to realize the automatic backwashing control of the safety filter. The electromechanical equipment is controlled by setting the control program, the safety filtration and the two-stage backwashing are started according to the set control program, the automatic operation degree of the equipment is higher, and the manpower can be greatly liberated.

Preferably, the shell 1 is made of carbon steel, and the inside and the outside of the shell are both provided with novel anti-corrosion material glass flakes for prominent corrosion prevention, so that the shell has the advantages of higher cohesive force, corrosion resistance, ageing resistance and the like.

In the integrated domestic sewage treatment device, the anoxic tank unit, the anaerobic tank unit and the aerobic tank unit are all provided with the fillers, and the fillers are combined fillers, so that two sludge forms of suspended sludge and attached sludge exist in the tank at the same time, the sludge load is improved, the denitrification effect is enhanced, and the integrated domestic sewage treatment device is safe and reliable. The sewage treatment device simplifies electromechanical equipment, and adopts one fan to carry a plurality of functions of oxygen supply, dosage stirring, sludge backflow, air washing and the like; the filtering system has unpowered water inlet and filtering and unpowered water overflow and water outlet, so that the total power of the device and the equipment failure rate are reduced, the energy consumption of the device is saved, and the service life of the device is prolonged. The invention further strengthens the traditional sewage treatment process by adopting the modes of fixing the filler, efficiently precipitating, quickly returning the sludge, preposing the anoxic tank and safely filtering, has universal applicability, can greatly save energy consumption, and solves the defects that the sludge concentration in the device of the traditional activated sludge process cannot be further improved, the denitrification and dephosphorization effect is poor, and the equipment has multiple functions and high energy consumption.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An integrated domestic sewage treatment device is characterized by comprising a shell (1), wherein an anoxic tank unit (3), an anaerobic tank unit (4), an aerobic tank unit (5), a secondary sedimentation tank unit (6), a safety filter unit (7) and an equipment room (2) are sequentially arranged in the shell (1), wherein the anoxic tank unit (3) is arranged on the front side of the anaerobic tank unit (4) and communicated with the anaerobic tank unit (4); the anaerobic tank unit (4) is arranged at the front side of the aerobic tank unit (5) and communicated with the aerobic tank unit (5); the secondary sedimentation tank unit (6) is arranged in the aerobic tank unit (5) and is communicated with the aerobic tank unit (5); the safety filter unit (7) is arranged at the rear side of the aerobic tank unit (5) and communicated with the secondary sedimentation tank unit (6); the equipment room (2) is arranged at the tail end of the safe filter chamber unit (7).

2. The integrated domestic sewage treatment device according to claim 1, wherein a first water inlet (301) and an overflow port (303) are provided on the side wall of the anoxic tank unit (3), wherein a dosing point (302) is provided inside the first water inlet (301);

an anoxic tank filler (304) and a first stirring device (10) are arranged in the anoxic tank unit (3); a movable cover plate (19) is arranged on the top shell of the anoxic pond unit (3).

3. The integrated domestic sewage treatment apparatus according to claim 1, wherein a water passing port (9) for communicating the anoxic tank unit (3) and the anaerobic tank unit (4) is provided between the anoxic tank unit (3) and the anaerobic tank unit (4);

a second water inlet (401) is arranged on the side wall of the anaerobic tank unit (4); an anaerobic tank filler (402) and a second stirring device (10') are arranged in the anaerobic tank unit (4); a movable cover plate (19) is arranged on the top shell of the anaerobic tank unit (4).

4. The integrated domestic sewage treatment apparatus according to claim 1, wherein a water passing port (9) for communicating the anaerobic tank unit (4) and the aerobic tank unit (5) is provided between the anaerobic tank unit (4) and the aerobic tank unit (5);

be equipped with evacuation mouth (503) on the lateral wall of good oxygen pond unit (5) the inside of good oxygen pond unit (5) is equipped with good oxygen pond filler (502) and aeration subassembly, wherein, aeration subassembly includes trachea (8) and aeration accessory (501), trachea (8) certainly the top of good oxygen pond unit (5) extends to its bottom and sets up, aeration accessory (501) set up good oxygen pond unit (5) bottom and with trachea (8) are linked together.

5. The integrated domestic sewage treatment device according to claim 4, wherein an inclined plate filler (602) is arranged in the secondary sedimentation tank unit (6), a clear water area is formed above the inclined plate filler (602), a sedimentation area is formed below the inclined plate filler (602), a mud bucket (603) is arranged at the bottom of the secondary sedimentation tank unit (6), the mud bucket (603) is arranged obliquely inwards from top to bottom, and the inclination angles of the mud buckets (603) on different side walls of the secondary sedimentation tank unit (6) are different; a sludge return port (604) is arranged below the sludge hopper (603) of the secondary sedimentation tank unit (6), the sludge return port (604) is of an open structure, and a certain space is reserved between the sludge return port (604) and the bottom of the aerobic tank unit (5).

6. The integrated domestic sewage treatment apparatus according to claim 5, wherein an effluent weir (605) is provided at the top of the clean water zone of the secondary sedimentation tank unit (6), an operation window (601) is provided on the side wall of the secondary sedimentation tank unit (6) and at a position close to the inclined plate packing (602), and a movable cover plate (19) is provided on the top housing of the aerobic tank unit (5) and on the housing above the secondary sedimentation tank unit (6).

7. The integrated domestic sewage treatment apparatus according to claim 1, wherein a clean water chamber (12) and a filtering chamber (13) are provided in said safety filter unit (7), wherein said clean water chamber (12) and said filtering chamber (13) are separated by a dome plate (16), and a clean water pipe (15) communicating the bottom of said filtering chamber (13) with said clean water chamber (12) is provided in said filtering chamber (13); a water outlet (701) is arranged at the top of the clean water chamber (12).

8. The integrated domestic sewage treatment apparatus according to claim 7, wherein a central cylinder (18) is fixed in said filtering chamber (13), said central cylinder (18) is disposed in communication with said filtering chamber (13), an inlet pipe (709) is disposed in said central cylinder (18), an inlet of said inlet pipe (709) is in communication with an outlet weir (605) of a secondary sedimentation tank unit (6), and a distal end of said inlet pipe (709) extends into said filtering chamber (13) through a bottom plate of said central cylinder (18); a water distributor (706) is arranged in the filter chamber (13) and below the water inlet pipe (709);

a backwashing pump (14), a sewage discharge pipe (17) and a backwashing air pipe (8 ') are further arranged in the central cylinder (18), the backwashing air pipe (8') extends from the top of the central cylinder (18) to the bottom of the filtering chamber (13) and is provided with an air backwashing fitting (708) at the bottom of the filtering chamber (13); the gas backwash fitting (708) is in communication with the backwash gas pipe (8'); an electromagnetic valve (11) is arranged on the backwashing gas pipe (8');

the bottom of the filter chamber (13) is provided with a filter plate (704), the bottom of the filter plate (704) is fixedly connected with the bottom of the shell (1) through a filter plate bracket (705), and the gas backwashing fitting (708) and the filter material layer (703) are sequentially arranged above the filter plate (704).

9. An integrated domestic sewage treatment apparatus according to claim 1, wherein a discharge outlet (702) is provided on a partition wall between the safety filter unit (7) and the equipment room (2) and on a side wall of the filter chamber (13), and a water producing outlet (205) is provided on a side wall of the equipment room (2).

10. The integrated domestic sewage treatment device according to claim 9, wherein a dosing device (201), an ultraviolet disinfection device (202), a fresh air system (204), an air device (206) and a control system (203) are further arranged in the equipment room (2); the dosing device (201) is communicated with a dosing point position (302) of the anoxic tank unit (3) through a pipeline; the ultraviolet disinfection device (202) is respectively communicated with a water outlet (701) and a water production port (205) of the safe filter unit (7); the reclaimed water is discharged through the water producing port (205) after being disinfected; the air equipment (206) is respectively communicated with the air pipe (8) and the backwashing air pipe (8'); the control system (203) is connected with the air equipment (206), the first stirring equipment (10), the second stirring equipment (10 '), the dosing device (201), the fresh air system (204), the electromagnetic valve (11) on the backwashing air pipe (8'), the backwashing pump (14) and the liquid level meter in the central cylinder (18).