CN106430577B

CN106430577B - Waste water and sewage treatment system

Info

Publication number: CN106430577B
Application number: CN201610826718.5A
Authority: CN
Inventors: 连潇; 连学林
Original assignee: Sichuan Sentao Technology Co ltd
Current assignee: Sichuan Sentao Technology Co ltd
Priority date: 2016-09-18
Filing date: 2016-09-18
Publication date: 2023-06-06
Anticipated expiration: 2036-09-18
Also published as: CN106430577A

Abstract

The utility model discloses a waste and sewage treatment system, which comprises a first regulating tank, an up-flow anaerobic sludge tank, a second regulating tank, a dissolved air water generator, a silent jet aerator, an aeration tank and a sedimentation tank which are connected in sequence, wherein the sedimentation tank is also connected to the dissolved air water generator through a waste water backflow channel; the upper part of the up-flow anaerobic sludge bed is a belly three-phase separator, and the lower part is a pulse jet cyclone water distributor. To sum up, the utility model: (1) the capacity and efficiency of the waste (sewage) water treatment process technology are improved under the condition of the same type of process equipment and device and the same structure volume equipment power; (2) the key technical defects of waste (sewage) water treatment technology in anaerobic treatment unit equipment (a pulse jet cyclone water distributor and a belly type cyclone water distributor) and aerobic treatment unit equipment (a dissolved air water generator, a mute jet aerator and an aeration tank) are overcome, and the cost performance of the technology is provided; (3) solves the problems of noise of the jet aerator and smaller influence on the environment.

Description

Waste water and sewage treatment system

Technical Field

The utility model relates to the technical field of high-concentration organic industrial wastewater and municipal wastewater treatment.

Background

The technology is currently applied to the treatment of high-concentration organic industrial wastewater and urban sewage and comprises an anaerobic activated sludge method and an aerobic sludge method.

Major effect defects in application: (1) the specific surface area utilization rate of structures of the anaerobic sludge bed (comprising an anaerobic sludge bed water distributor and three separators) is low, the water flow path is short-circuited, the sludge loss is serious, and the treatment efficiency is not ideal. (2) The aeration of the aerobic activated sludge method has low oxygen conversion rate, high energy consumption and difficult maintenance of underwater pipe network equipment. (3) Jet aerator has high noise and environmental impact

Technical defect causing effect defect: (1) the existing anaerobic sludge bed water distributor adopts a groined or cross shape, and the water distributor with the structure is usually fixedly arranged at the bottom of a structure and can only be used for distributing water in a fixed direction; the three-item separation can only provide three-item separation of water, gas and mud with regular triangle section; (2) the aeration tank in the aerobic activated sludge process has the defect of low oxygen conversion rate caused by the mixing mode of compressed air and normal-pressure sewage; (3) the jet aerator has unreasonable design air in the air inlet section, high noise and neglected influence on the environment.

Disclosure of Invention

The utility model aims to solve the technical problems that:

(1) Anaerobic mud bed: (1) the specific surface area utilization rate of sewage and sludge in a structure, (2) the problem of water flow short circuit and sludge loss of a three-phase separator is solved;

(2) The oxygen conversion rate of an aeration tank in the oxygen activated sludge process, and the energy consumption of equipment is reduced;

(3) The jet aerator has high noise.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the sewage treatment system comprises a first regulating tank, an up-flow anaerobic sludge tank, a second regulating tank, a dissolved air water generator, a silent jet aerator, an aeration tank and a sedimentation tank which are connected in sequence, wherein the sedimentation tank is also connected to the dissolved air water generator through a sewage backflow channel; the upper part of the up-flow anaerobic sludge bed is a web-type three-phase separator, the lower part of the up-flow anaerobic sludge bed is a pulse jet cyclone water distributor, and the first regulating tank is connected with the second regulating tank through the pulse jet cyclone water distributor and the web-type three-phase separator in sequence.

The pulse jet swirl water distributor comprises an annular water distribution pipe, the annular water distribution pipe is connected with a first regulating tank, a plurality of water distribution pipes are connected to the annular water distribution pipe along the circumferential direction of the annular water distribution pipe, the water distribution pipes are communicated with each other, a plurality of water distribution holes are formed in the water distribution pipes, and each water distribution pipe is connected with a control valve; the control valve is used for controlling the on-off of water flow in the water distribution pipe, and is arranged between the water outlet of the water distribution pipe and the water inlet of the water distribution pipe; nozzles are arranged on the water distribution holes; the nozzles are obliquely arranged on the water distribution pipes, the nozzle orifices are obliquely downward at a certain angle relative to the plane of the water distribution pipes, and the directions of the nozzles on the water distribution pipes are uniform clockwise or anticlockwise; one end of the water distribution pipe, which is far away from the water distribution pipe, is fixedly connected to an annular bracket.

The belly type three-phase separator comprises a structure, an inverted cone cylindrical mud blocking cone and a solid-liquid separator, wherein the inverted cone cylindrical mud blocking cone is arranged in the structure, the upper end of the mud blocking cone is of a closed structure, the lower end of the mud blocking cone is of an open structure, the lower end of the mud blocking cone is circumferentially fixed on the inner wall of the structure, a plurality of diversion holes and a plurality of mud return holes are respectively formed in the mud blocking cone, an exhaust port is formed in the upper end of the mud blocking cone, and the solid-liquid separator is positioned in the center of the opening of the lower end of the mud blocking cone; the solid-liquid separator is of a round structure, and the cross section of the solid-liquid separator is in a spindle shape; an annular overflow groove is arranged on the inner wall above the structure, and the overflow groove is communicated with a water outlet; the plurality of diversion holes are arranged at the waist position of the mud baffle cone and are uniformly distributed along the circumferential direction of the mud baffle cone; the sludge reflux holes are arranged at the lower part of the mud blocking cone and are uniformly distributed along the circumferential direction of the mud blocking cone; the exhaust port is connected with a pressure control valve.

The air-dissolved water generator comprises a tank body, wherein at least one compressed air release device is arranged on the inner side wall of the tank body, and the included angle between the extension line of the compressed air release direction of each compressed air release device and the tangent line of the tank body where the compressed air release device is positioned is 30-60 degrees; each compressed air release device is arranged horizontally or obliquely towards the outlet side of the dissolved air water; when the number of the compressed air release devices is two or more, the compressed air release devices are arranged in an unequal and uniform way along a preset spiral line, the spiral line is matched with the dissolved air water vortex to be formed by the tank body, and the air release directions of the compressed air release devices are symmetrically or uniformly arranged in the radial direction of the tank body; the two compressed air release devices are all ultra-microporous ejectors.

The mute jet aerator comprises a spray head and a gas-water mixing chamber, wherein the gas-water mixing chamber is positioned below the spray head, a throat pipe communicated with the gas-water mixing chamber is arranged below the gas-water mixing chamber, and the throat pipe is of a horn-shaped structure with a big upper part and a small lower part; the air-water mixing chamber is of a horn mouth structure with a large upper part and a small lower part; and a muffler is wrapped outside the spray head and the air-water mixing chamber.

The silencing device comprises an upper silencer and a lower silencer, and the upper silencer and the lower silencer share a shell; the upper silencer is arranged on the upper half part of the shell and comprises an upper air channel, an upper silencing chamber is arranged in the upper air channel, a porous plate is arranged at the air inlet of the upper air channel, the porous plate is arranged at the interface of the upper silencing chamber and the upper air channel, the air inlet of the upper air channel is communicated with the atmosphere, and the outlet of the upper air channel is communicated with the air-water mixing chamber; the lower silencer is arranged at the lower half part of the shell and comprises a lower air channel, a lower silencing chamber is arranged in the lower air channel, a porous plate is arranged at an air inlet of the lower air channel, the porous plate is arranged at the interface of the lower silencing chamber and the lower air channel, the air inlet of the lower air channel is communicated with the atmosphere, and an outlet of the lower air channel is communicated with the air-water mixing chamber; a porous plate is arranged between the lower silencing chamber and the air-water mixing chamber at intervals.

The beneficial effects of the utility model are that:

(1) Anaerobic mud bed: (1) the belly type three-phase separator adopts an inverted cone-shaped mud blocking cone to be matched with the tank body, and the solid-liquid separator is arranged into a spindle-shaped section structure, so that the specific surface area utilization rate of the device can be effectively increased during sewage treatment, a mud secondary touch loop is formed in the tank body, and the problem of mud loss caused by low specific surface area utilization rate of the existing structure is effectively solved; (2) the pulse jet swirl water distributor is annularly arranged, the on-off of the water distribution pipe is controlled by the electromagnetic valve respectively, the water distribution with the whole cross section and the all directions is realized, and the utilization rate of the specific surface area of the structure is improved; the control of the controller on each electromagnetic valve is used for controlling the water distribution frequency and the flow, and pulse rising rotational flow is generated in the treatment process, so that the granular sludge of the sludge bed is always suspended in the treatment process, the full contact between the sludge and the sewage is realized, the sewage treatment efficiency is improved, and the problems of short circuit of the water flow and sludge loss of the three-phase separator are solved;

(2) The dissolved air water generator improves the treatment capacity (for air microporous aeration, hose aeration, mechanical submerged aeration and engineering comparison of mechanical shallow aeration equipment) of the aerobic activated sludge process technology by 20-25% under the condition of the same equipment power, and reduces the equipment energy consumption; the pollution enters the aeration tank after being dissolved by the dissolved gas water generator, no pipe network, valve and traditional aeration head are arranged under the water of the aeration tank, no equipment under the water of the aeration tank is protected from worry after maintenance, the device is applicable to the aeration tank with any shape, the phenomenon of open circuit of a water flow path is avoided, and the utilization rate of the specific surface area of a structure is improved;

(3) The orifice plate for the silent jet aerator realizes resistive silencing, and the sound absorbing chamber realizes resistive silencing, so that the middle-low frequency noise is effectively reduced, the total noise is reduced from 80-100 dB to 50-60 dB, and the noise pollution problem of the jet aerator is solved; the air-water mixing chamber (D6) is also increased, and the throat pipe is arranged below the air-water mixing chamber (D6), so that the air inflow is doubled, the air-water swirl diffusion is carried out on the throat pipe part, the air-water merging can be carried out again, and the mixing time and space are doubled; therefore, the oxygen conversion rate is improved under the condition of the same power in the similar equipment, the power efficiency is correspondingly improved, and the treatment capacity of the aerobic activated sludge process technology is further improved.

In summary, the utility model comprises: (1) the capacity and efficiency of the waste (sewage) water treatment process technology are improved under the condition of the same type of process equipment and device and the same structure volume equipment power; (2) the key technical defects of waste (sewage) water treatment technology in anaerobic treatment unit equipment (a pulse jet cyclone water distributor and a belly type cyclone water distributor) and aerobic treatment unit equipment (a dissolved air water generator, a mute jet aerator and an aeration tank) are overcome, and the cost performance of the technology is provided; the noise of the jet aerator is solved, and the influence on the environment is smaller; (3) the system midrib jet cyclone water distributor, the belly type cyclone water distributor, the dissolved air water generator and the silent jet aerator can be widely applied to sludge treatment of urban sewage treatment plants (stations), sewage treatment and sewage (sludge) treatment of industrial organic sewage treatment plants (stations) in a combined or independent way, and are applied to equipment implementation of circular structures (devices) and rectangular (rectangular and square) structures (devices).

Drawings

FIG. 1 is a system block diagram of the present utility model;

FIG. 2 is a schematic diagram of an up-flow anaerobic sludge blanket, wherein the upper part of the up-flow anaerobic sludge blanket is a belly three-phase separator, and the lower part of the up-flow anaerobic sludge blanket is a pulse jet cyclone water distributor;

FIG. 3 is a schematic structural diagram of a pulse jet swirl water distributor;

FIG. 4 is a cross-sectional view A-A of FIG. 2, showing the position and connection of water distribution pipe A2 and nozzle A5;

FIG. 5 is a schematic top view of an abdominal three-phase separator;

FIG. 6 is a schematic diagram of the front view of the gas-dissolved water generator, wherein the solid arrows in the diagram show the water flow direction;

FIG. 7 is a schematic top view of a water-dissolved air generator, wherein solid arrows show the water flow direction and broken arrows show the compressed air release direction;

FIG. 8 is a schematic view of a silent jet aerator, with dashed arrows showing the flow path of air;

fig. 9 is a schematic top view of a silent jet aerator;

wherein, the liquid crystal display device comprises a liquid crystal display device,

pulse jet swirl water distributor: the device comprises a water distribution pipe (A1), a water distribution pipe (A2), a control valve (A3), a nozzle (A4), an annular bracket (A5), a structure (A6) and a main sewage pipeline (A7);

abdominal three-phase separator: the device comprises a mud blocking cone (B2), a mud blocking cone body (B21), a maintenance access hole (B22), a hole cover (B23), a solid-liquid separator (B3), a diversion hole (B4), a mud backflow hole (B5), an exhaust port (B6) and an overflow groove (B7);

a dissolved air water generator: the device comprises a tank body (C1), a water inlet (C11), a dissolved air water outlet (C12), a lower compressed air release device (C21), an upper compressed air release device (C22), a compressed air valve (C23), a pressure gauge (C3), a support (C31), support legs (C32) and lifting lugs (C4);

mute jet aerator: the device comprises a water inlet pipe (D1), a dissolved air water outlet pipe (D2), an upper air channel (D3), a lower air channel (D4), a spray head (D5), an air-water mixing chamber (D6), a throat pipe (D7), an upper silencing chamber (D81), a lower silencing chamber (D82), a porous plate (D9), a protective cover (D10) and a shell (D12).

Detailed Description

As shown in fig. 1, the waste water and sewage treatment system comprises a first regulating tank, an up-flow anaerobic sludge tank, a second regulating tank, a dissolved air water generator, a silent jet aerator, an aeration tank and a sedimentation tank which are connected in sequence, wherein the sedimentation tank is also connected to the dissolved air water generator through a waste water backflow channel; the upper part of the up-flow anaerobic sludge bed is a web-type three-phase separator, the lower part of the up-flow anaerobic sludge bed is a pulse jet cyclone water distributor, and the first regulating tank is connected with the second regulating tank through the pulse jet cyclone water distributor and the web-type three-phase separator in sequence.

The system is formed by innovatively combining four unit nodes; namely a pulse jet cyclone water distributor, an abdominal three-phase separator, a dissolved air water generator and a mute jet aerator. These four unit nodes are also key to solving the various technical problems.

Pulse jet swirl water distributor

As shown in fig. 2, 3 and 4, in this embodiment, the circular water distribution pipe A1 is disposed along the structure A6, a water inlet of the water distribution pipe A1 is connected with the main sewage pipe A7, eight water outlets are uniformly disposed on the water distribution pipe A1, water distribution pipes A2 are respectively connected to water outlets of the water distribution pipe A1, so that the water distribution pipe A1 is communicated with the water distribution pipe A2, a plurality of water distribution holes are disposed on the water distribution pipe A2, and sewage flows out from the water distribution holes after passing through the water distribution pipe A1 and the water distribution pipe A2. In this embodiment, a control valve A3 is respectively disposed at the connection position of the water distribution pipe A1 and each water distribution pipe A2, and the control valve A3 is used for controlling the on-off of water flow in each water distribution pipe A2. The control valve A3 is arranged to realize independent control of on-off of water flow in each water distribution pipe A2, so that the problem of single water distribution mode of the traditional structure is solved.

In this embodiment, the nozzles A4 are disposed on the water distribution holes, as shown in fig. 3, the nozzles A4 are disposed on the water distribution pipes A2 in an inclined manner, the nozzle openings are inclined downward at a certain angle with respect to the plane of the water distribution pipes A2, and the nozzles A4 on each water distribution pipe A2 face in a uniform clockwise or counterclockwise direction.

In the embodiment, the control valve A3 adopts the electromagnetic valves, each electromagnetic valve is respectively connected with the controller, the opening quantity and time of the electromagnetic valves can be automatically controlled through the controller, and the water distribution frequency and flow rate are controlled, so that the sewage sprayed out of the water distribution pipe A2 forms pulse ascending rotational flow on the anaerobic sludge bed, the sewage and the sludge of the sludge bed are fully mixed, and the sewage treatment efficiency is improved.

Meanwhile, on the installation of the water distribution pipes A2, one end, far away from the water distribution pipe A1, of each water distribution pipe A2 can be fixedly connected through an annular bracket A5, so that the structural stability of the whole water distributor is improved.

Abdominal three-phase separator

As shown in fig. 2 and 5, in the present embodiment, the belly three-phase separator includes a structure A6, a mud-guard cone B2 and a solid-liquid separator B3, and both the mud-guard cone B2 and the solid-liquid separator B3 are disposed in the structure A6. The mud blocking cone B2 is in an inverted cone cylindrical structure in the structure A6, the upper end of the mud blocking cone B2 is in a closed structure, the lower end of the mud blocking cone B2 is in an open structure, the open structure of the mud blocking cone B2 is downwards buckled in the structure A6, the circumferential end face of the open structure at the lower end of the mud blocking cone B2 is fixed on the inner wall of the structure A6, and an approximately closed structure is formed between the mud blocking cone B2 and the structure A6.

A plurality of diversion holes B4 and a plurality of sludge backflow holes B5 are respectively arranged on the mud baffle cone B2, wherein the diversion holes B4 are arranged at the waist position, close to the middle of the cone cylindrical structure, of the mud baffle cone B2, and the diversion holes B4 are uniformly distributed along the circumferential direction of the mud baffle cone B2; the sludge reflux holes B5 are arranged on the sludge blocking cone B2 and close to the lower end of the cone-shaped structure, and the sludge reflux holes B5 are uniformly distributed along the circumferential direction of the sludge blocking cone B2.

The upper end of the mud baffle cone B2 is provided with an exhaust port B6 for separating gas, and the gas in the sewage is discharged through the exhaust port B6, so that the separation of the gas in the sewage is realized.

The solid-liquid separator B3 is used as an important component in the three-phase separator and is arranged at the center of the opening at the lower end of the mud blocking cone B2, the solid-liquid separator B3 in the embodiment is of a circular structure, the cross section of the solid-liquid separator B3 is in a spindle shape, and the upper end face and the lower end face of the solid-liquid separator B3 are smooth arc surfaces. The solid-liquid separator B3 is fixedly connected with the structure A6 or the mud baffle cone B2 through a bracket, so that the solid-liquid separator B can be fixed at an opening below the mud baffle cone B2.

In the embodiment, the water outlet structure is improved, wherein an annular overflow groove B7 is arranged on the inner wall above a structure A6, and the overflow groove B7 is communicated with a water outlet; the treated sewage enters the overflow tank B7 and is discharged through the water outlet, the structure can reduce the drainage speed in unit time, organic matters in the sewage can be fully mixed with the granular sludge of the sludge bed, and the sewage treatment quality is improved.

In this embodiment, for the maintenance and repair of the abdominal three-phase separator, the mud-stopping cone B2 may be configured to be composed of two parts, specifically, the mud-stopping cone B2 includes a mud-stopping cone body B21, a maintenance access hole B22 is provided at the top of the mud-stopping cone body B21, a hole cover B23 is provided on the maintenance access hole B22 at the top of the mud-stopping cone body B21, and a detachable movable connection is provided between the hole cover B23 and the mud-stopping cone body B21. When maintenance and overhaul are needed, the hole cover B23 can be opened to enter the structure A6 from the maintenance overhaul hole B22 at the top of the mud baffle cone body B21.

Dissolved air water generator

As shown in fig. 6 and 7, in this embodiment, the dissolved air water generator includes a tank body C1, two compressed air releasing devices are disposed on the inner side wall of the tank body C1, and are a lower compressed air releasing device C21 and an upper compressed air releasing device C22, and the included angle between the extension line of the compressed air releasing direction of each compressed air releasing device and the tangent line of the tank body C1 where the compressed air releasing device is located is 30-60 °, so that turbulence is generated when the compressed air releasing device is too large or too small, and oxygen utilization rate and oxygenation capacity are affected. In this embodiment preferably 45 deg..

The compressed air release devices are arranged unevenly along a predetermined spiral line, and the spiral line is matched with the dissolved air water vortex to be formed by the tank body C1 or determines the form of the dissolved air water vortex. Each compressed air release device is arranged horizontally or obliquely to the dissolved air water outlet C12, and the inclined angle is matched with the spiral line.

When the number of compressed air release devices is single, the compressed air release devices are also arranged on a preset spiral line, and the spiral line is matched with the dissolved air water vortex formed by the tank body C1 or determines the form of the dissolved air water vortex.

The quantity of the compressed air release devices is set according to the flow, and when the compressed air release devices are used for larger flow, the height of the tank C1, the sewage flow, the quantity of the compressed air release devices 2 and the matched facilities can be correspondingly increased to meet the requirements. For example, the flow rate is doubled, and compared with the embodiment, the number of the compressed air releasing devices is increased by two, and the height of the tank body C1 is correspondingly increased.

The compressed air release devices are arranged in an unequal symmetry mode when more than two compressed air release devices are arranged, such as an even number of compressed air release devices; and when the number of the coils is odd, the coils are unevenly arranged and are evenly arranged along a preset spiral line. The reason for the unequal symmetrical arrangement or unequal uniform arrangement is that the formation of single-strand rotating vortex is facilitated, and if the equal symmetrical arrangement or the equal uniform arrangement is interfered, the formation of the single-strand rotating vortex is affected, and then the gas-water dissolving transmission efficiency and the output are affected.

By asymmetric or non-uniform, it is meant that the individual compressed air release means are not of equal height as seen in the front view of fig. 6, whereas as seen in fig. 2, the individual compressed air release means are symmetrically or uniformly arranged in the radial direction of the tank. The air release directions of the compressed air release devices are symmetrically or uniformly arranged in the radial direction of the tank body 1.

The two compressed air release devices are all ultra-microporous ejectors.

The water inlet C11 and the dissolved air water outlet C12 of the tank body C1 are respectively arranged at the bottom and the top of the tank body C1. In this embodiment, the water inlet C11 is located at the bottommost end of the tank C1, and the dissolved air water outlet C12 is located at the side wall of the top of the tank C1. The sedimentation tank is connected to a water pump in front of the dissolved air water generator through a waste water return channel, and waste water is pumped into a water inlet C11 of the tank body C1 by the water pump.

Sewage enters from the bottommost end of the tank body C1 and flows upwards, and after encountering high-speed compressed air bubbles sprayed by the bottommost compressed air releasing device, the sewage starts to rotate to form vortex, and is continuously accelerated by the high-speed compressed air bubbles sprayed by the subsequent compressed air releasing device 2. In this example, the compressed air pressure was 8kg/cm ² The sewage pressure is 4 kg/cm ² . The greater the pressure of water, the greater the surface tension of water molecules, the easier the adsorption of bubbles, and the air is pressed into the sewage, compared with the normal pressure water aeration process, the oxygenation capacity and the oxygen utilization rate are effectively improved, and the oxygenation power efficiency is improved.

Each compressed air release device is provided with a compressed air valve C23, so that the corresponding compressed air release device is conveniently opened or closed, the corresponding compressed air release device is convenient to disassemble and assemble, the compressed air release device in a working state can be increased or decreased, and different sewage flows are further adapted.

The upper portion of the tank body C1 is provided with two symmetrical lifting lugs C4, three supports C31 are uniformly arranged in the middle of the tank body C1, and each support C31 is provided with a supporting leg C32 respectively.

Mute jet aerator

As shown in fig. 8 and 9, in this embodiment, the silent jet aerator includes a nozzle D5 and a gas-water mixing chamber D6, the gas-water mixing chamber D6 is located below the nozzle D5, a throat D7 communicating with the gas-water mixing chamber D6 is disposed below the gas-water mixing chamber D6, and the throat D7 has a horn mouth structure with a large upper part and a small lower part. The air-water mixing chamber D6 is of a horn mouth structure with a large upper part and a small lower part.

The silent jet aerator comprises a two-stage horn mouth structure formed by connecting a gas-water mixing chamber D6 and a throat pipe D7 in series, and water sprayed at high speed and decompressed by diffusion and sucked air are mixed in a rotary mode at the throat pipe D7. Thus, the mixing running path of the air and the water is increased, the mixing time and the mixing space are doubled, and the oxygen conversion rate and the power efficiency are improved. At the same time, the water flow speed is reduced due to the swirling diffusion of the water flow, and the noise caused by the impact of the water flow on the air and the equipment is reduced.

In order to solve the noise pollution problem of the jet aerator and effectively reduce noise, the outer side of the spray head D5 and the air-water mixing chamber D6 are wrapped with a silencing device.

The muffler device includes an upper muffler and a lower muffler, which share a housing D12.

The upper silencer is arranged on the upper half part of the shell D12 and comprises an upper air channel D3, an upper silencing chamber D81 is arranged in the upper air channel D4, a porous plate D9 is arranged at an air inlet of the upper air channel D3, the porous plate D9 is arranged at the interface between the upper silencing chamber D81 and the upper air channel D3, the air inlet of the upper air channel D3 is communicated with the atmosphere, and an outlet of the upper air channel D3 is communicated with the air-water mixing chamber D6.

The lower silencer is arranged on the lower half part of the shell D12 and comprises a lower air channel D4, a lower silencing chamber D82 is arranged in the lower air channel D4, a porous plate D9 is arranged at an air inlet of the lower air channel D4, the porous plate D9 is arranged at the interface between the lower silencing chamber D82 and the lower air channel D4, the air inlet of the lower air channel D4 is communicated with the atmosphere, and an outlet of the lower air channel D4 is communicated with the air-water mixing chamber D6.

In this embodiment, a water inlet pipe D1 is connected above the throat pipe D7, a dissolved air water outlet pipe D2 is connected below the throat pipe D7, and according to the size of the muffler device, a part of the water inlet pipe D1 and the dissolved air water outlet pipe D2 may be wrapped in the muffler device.

Each air passage is arranged to be zigzag as much as possible, and the air passes through the silencing chamber D82, so that sound waves can collide and reflect as much as possible and are consumed through each perforated plate and each silencing chamber, and the silencing effect can be improved as much as possible.

In order to further provide the sound-deadening effect, a porous plate D9 is spaced between the lower sound-deadening chamber D82 and the air-water mixing chamber D6.

The top of the muffler device is provided with a protective cover D10 for placing rainwater into the muffler device.

The silencing device is of a cylindrical structure, each perforated plate D9 is of a circular tube structure concentric with the spray head D5, and the shell D12 is of a cylindrical structure concentric with the spray head D5.

The mute jet aerator adopts the upper and lower double-channel air inlet on the periphery of the cylinder structure, increases the air inflow by one time, and improves the oxygen conversion rate and the power efficiency under the same power condition of the same equipment.

Meanwhile, the mute jet aerator adopts the pore plate to realize resistive silencing, adopts the sound absorbing chamber to realize resistive silencing, effectively reduces middle-low frequency noise, reduces total noise from 80-100 dB to 50-60 dB at present, and solves the noise pollution problem of the jet aerator.

The silent jet aerator can be combined with a dissolved air water generator for use, can supplement oxygen consumed in the dissolved air process again, and can create conditions for improving the oxygen conversion rate of the activated sludge process treatment technical system.

The silent jet aerator can be widely applied to structures or mechanical devices in various shapes such as round, rectangular, oblong and square shapes and the like by using an aerobic aeration aerobic activated sludge method.

The specification and figures are to be regarded in an illustrative rather than a restrictive sense, and based on the teachings disclosed herein, one skilled in the art could make various substitutions and alterations to some of these features without inventive faculty, all of which are within the scope of this disclosure.

Claims

1. Waste water and sewage treatment system, its characterized in that: the device comprises a first regulating tank, an up-flow anaerobic sludge tank, a second regulating tank, a dissolved air water generator, a silent jet aerator, an aeration tank and a sedimentation tank which are connected in sequence, wherein the sedimentation tank is also connected to the dissolved air water generator through a waste water backflow channel; the upper part of the up-flow anaerobic sludge bed is a belly three-phase separator, the lower part of the up-flow anaerobic sludge bed is a pulse jet cyclone water distributor, and the first regulating tank is connected with the second regulating tank through the pulse jet cyclone water distributor and the belly three-phase separator in sequence;

the belly type three-phase separator comprises a structure, an inverted cone cylindrical mud blocking cone and a solid-liquid separator, wherein the inverted cone cylindrical mud blocking cone is arranged in the structure, the upper end of the mud blocking cone is of a closed structure, the lower end of the mud blocking cone is of an open structure, the lower end of the mud blocking cone is circumferentially fixed on the inner wall of the structure, a plurality of diversion holes and a plurality of mud return holes are respectively formed in the mud blocking cone, an exhaust port is formed in the upper end of the mud blocking cone, and the solid-liquid separator is positioned in the center of the opening of the lower end of the mud blocking cone; the solid-liquid separator is of a round structure, and the cross section of the solid-liquid separator is in a spindle shape; an annular overflow groove is arranged on the inner wall above the structure, and the overflow groove is communicated with a water outlet; the plurality of diversion holes are arranged at the waist position of the mud baffle cone and are uniformly distributed along the circumferential direction of the mud baffle cone; the sludge reflux holes are arranged at the lower part of the mud blocking cone and are uniformly distributed along the circumferential direction of the mud blocking cone, and the exhaust port is connected with a pressure control valve;

the air-dissolved water generator comprises a tank body, wherein at least two compressed air release devices are arranged on the inner side wall of the tank body, and the included angle between the extension line of the compressed air release direction of each compressed air release device and the tangent line of the tank body where the compressed air release device is positioned is 30-60 degrees; each compressed air release device is arranged horizontally or obliquely towards the outlet side of the dissolved air water; the compressed air release devices are arranged in an unequal and uniform mode along a preset spiral line, the unequal and uniform arrangement means that the heights of the compressed air release devices are unequal and are uniformly distributed in the radial direction of the tank body, the spiral line is matched with dissolved air water vortex formed by the tank body, and the air release directions of the compressed air release devices are symmetrically or uniformly arranged in the radial direction of the tank body; the two compressed air release devices are all ultra-microporous ejectors; the water inlet and the dissolved air water outlet of the tank body are respectively arranged at the bottom and the top of the tank body;

the mute jet aerator comprises a spray head and a gas-water mixing chamber, wherein the gas-water mixing chamber is positioned below the spray head, a throat pipe communicated with the gas-water mixing chamber is arranged below the gas-water mixing chamber, and the throat pipe is of a horn-shaped structure with a big upper part and a small lower part; the air-water mixing chamber is of a horn mouth structure with a large upper part and a small lower part; the upper part of the spray head is connected with a water inlet pipe, and the lower part of the throat pipe is connected with a dissolved air water outlet pipe.

2. The waste and sewage treatment system according to claim 1, wherein: the pulse jet swirl water distributor comprises an annular water distribution pipe, the annular water distribution pipe is connected with a first regulating tank, a plurality of water distribution pipes are connected to the annular water distribution pipe along the circumferential direction of the annular water distribution pipe, the water distribution pipes are communicated with each other, a plurality of water distribution holes are formed in the water distribution pipes, and each water distribution pipe is connected with a control valve; the control valve is used for controlling the on-off of water flow in the water distribution pipe, and is arranged between the water outlet of the water distribution pipe and the water inlet of the water distribution pipe; nozzles are arranged on the water distribution holes; the nozzles are obliquely arranged on the water distribution pipes, the nozzle orifices are obliquely downward at a certain angle relative to the plane of the water distribution pipes, and the directions of the nozzles on the water distribution pipes are uniform clockwise or anticlockwise; one end of the water distribution pipe, which is far away from the water distribution pipe, is fixedly connected to an annular bracket.

3. The waste and sewage treatment system according to claim 1, wherein: and a muffler is wrapped outside the spray head and the air-water mixing chamber.

4. A waste and sewage treatment system as claimed in claim 3 wherein: the silencing device comprises an upper silencer and a lower silencer, and the upper silencer and the lower silencer share a shell; the upper silencer is arranged on the upper half part of the shell and comprises an upper air channel, an upper silencing chamber is arranged in the upper air channel, a porous plate is arranged at the air inlet of the upper air channel, the porous plate is arranged at the interface of the upper silencing chamber and the upper air channel, the air inlet of the upper air channel is communicated with the atmosphere, and the outlet of the upper air channel is communicated with the air-water mixing chamber; the lower silencer is arranged at the lower half part of the shell and comprises a lower air channel, a lower silencing chamber is arranged in the lower air channel, a porous plate is arranged at an air inlet of the lower air channel, the porous plate is arranged at the interface of the lower silencing chamber and the lower air channel, the air inlet of the lower air channel is communicated with the atmosphere, and an outlet of the lower air channel is communicated with the air-water mixing chamber; a porous plate is arranged between the lower silencing chamber and the air-water mixing chamber at intervals.