CN216662767U

CN216662767U - Integrated sewage treatment device combining air floatation, MBBR (moving bed biofilm reactor) and floating and sinking

Info

Publication number: CN216662767U
Application number: CN202121746412.1U
Authority: CN
Inventors: 於仲清; 王忠敏; 薛攀; 赵乐浒; 姜栋; 朱红生
Original assignee: Huatian Engineering and Technology Corp MCC
Current assignee: Huatian Engineering and Technology Corp MCC
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-06-03
Anticipated expiration: 2031-07-29

Abstract

The utility model discloses an integrated sewage treatment device combining air floatation, MBBR (moving bed biofilm reactor) and floating and sinking. The method comprises the following steps: the device comprises a box body, wherein an air flotation zone, an MBBR biological reaction zone, a floating and sinking zone, a sludge temporary storage zone and a device room are arranged in the box body; the integrated sewage treatment device comprises the following steps of: sewage is conveyed to the air flotation zone through the water inlet pipe, effluent after passing through the air flotation zone enters the MBBR biological reaction zone through a pipeline, sewage after biological treatment in the MBBR biological reaction zone enters the floating and sinking zone through a pipeline, and effluent after being treated in the floating and sinking zone is discharged through the water outlet pipe. The utility model adopts the combined process of air flotation, MBBR and floating and sinking, can effectively remove various pollutants, has high removal efficiency and meets the requirement on multi-water treatment. The integrated device saves investment, occupies small area, reduces operation and maintenance cost, and has compact and beautiful integral mechanism.

Description

Integrated sewage treatment device combining air floatation, MBBR (moving bed biofilm reactor) and floating and sinking

Technical Field

The utility model belongs to the technical field of sewage treatment application, and particularly relates to an integrated sewage treatment device combining air floatation, MBBR and floating and sinking.

Background

With the high-speed development of economy and the acceleration of urbanization process, the increasingly serious problem of water environment pollution in China becomes more and more prominent, and the situation of water resource shortage becomes more severe. Therefore, the effective treatment of sewage is an important way for relieving the shortage of water resources in China. However, in view of the current basic national conditions that the urbanization level of China is not high and the accumulation degree of most rural population is low, the traditional mode of implementing large-scale sewage unified treatment is difficult to meet the treatment requirement of a large amount of distributed sewage. Meanwhile, with the continuous promotion of the comprehensive treatment of the watershed water environment in China, before the black and odorous water body is thoroughly eliminated, the effective treatment of long-term and sudden river water pollution needs to be ensured, the integrated sewage treatment equipment is flexible to set, the remote transportation can be realized, and various water pollution emergencies can be effectively and timely dealt with.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an integrated sewage treatment device combining air floatation, MBBR (moving bed biofilm reactor) and floating and sinking, which adopts integrated equipment, removes suspended particles in inlet water by using air floatation, takes the MBBR as a biological treatment process to carry out oxidative decomposition on organic matters, and carries out solid-liquid separation on fallen mud films by floating and sinking.

In order to achieve the purpose, the integrated sewage treatment device combining air floatation, MBBR and floating and sinking comprises: the device comprises a box body, wherein an air flotation zone, an MBBR biological reaction zone, a floating and sinking zone, a sludge temporary storage zone and a device room are respectively arranged in the box body. Sewage is conveyed to the air flotation zone through the water inlet pipe, effluent after passing through the air flotation zone enters the MBBR biological reaction zone through the pipeline, sewage after biological treatment in the MBBR biological reaction zone enters the sinking-floating zone through the pipeline, and effluent after biological treatment in the sinking-floating zone is discharged through the water outlet pipe.

Further, the air flotation zone comprises: the mixing chamber, the flocculation chamber, the contact chamber, the separation chamber, the slag discharge groove and the water outlet chamber are sequentially communicated; a mixing stirrer is arranged in the mixing chamber, and PAC is added; the flocculation chamber is provided with a flocculation stirrer and PAM is added; the contact chamber is provided with a pressurized dissolved air water inlet pipe and a dissolved air releaser; the top of the separation chamber is provided with a slag scraper, the middle part of the separation chamber is provided with a perforated water collecting pipe, and the bottom of the separation chamber is provided with a perforated static pressure mud pipe; the slag discharging groove is provided with a slag discharging pipe; the water outlet chamber is communicated with the MBBR biological reaction zone through a pipeline.

Further, the MBBR biological reaction zone comprises: an aeration tank having a water inlet conduit and a water outlet conduit; an aeration component and a suspended filler are arranged in the aeration tank; the water inlet pipeline and the water outlet pipeline are provided with filler intercepting screens. The suspended filler adopts HDPE; the aeration component adopts an EPDM disc type aerator.

Furthermore, a filler supporting pore plate is arranged at the upper part of the aeration component. Preferably, the aperture of the filler supporting pore plate is 50mm, and the installation height of the filler supporting pore plate is 600mm higher than the bottom of the pool. Preferably, the packing support orifice plate is liftably mounted.

Further, the sink-float zone includes: the mixing chamber, the flocculation chamber, the contact chamber, the separation chamber, the slag discharge groove and the water outlet chamber are sequentially communicated; a mixing stirrer is arranged in the mixing chamber, and PAC is added; a flocculation stirrer is arranged in the flocculation chamber, and PAM is added; the contact chamber is provided with a pressurized dissolved air water inlet pipe and a dissolved air releaser; the top of the separation chamber is provided with a slag scraper, the middle upper part of the separation chamber is provided with an inclined pipe area, the middle lower part of the separation chamber is provided with a perforated water collecting pipe, and the bottom of the separation chamber is provided with a perforated static pressure mud pipe; the slag discharging groove is provided with a slag discharging pipe; the water outlet chamber is provided with a water outlet pipe and a return pipe.

Further, a stirrer is arranged in the sludge temporary storage area; and the sludge in the air flotation zone and the floating and sinking zone is connected to the temporary sludge storage zone through a static pressure sludge discharge pipe.

Further, the equipment room is provided with: air supporting equipment, aeration equipment, medicine adding equipment and a control system. The air floatation device comprises: an air compressor, a pressure water pump and a dissolved air tank; the medicine adding equipment comprises: PAC and PAM feeding systems; wherein, the air compressor and the pressurized water pump are connected to the dissolved air tank; the dissolved air tank is connected to a pressurized dissolved air inlet pipe and a dissolved air releaser of the air flotation tank, and a pressurized dissolved air inlet pipe and a dissolved air releaser of the floating and sinking tank; the aeration equipment is connected to the MBBR biological reaction zone aeration component.

Further, the drug adding equipment is used for adding PAC into a mixing chamber of an air flotation zone and a mixing chamber of a floating and sinking zone, and adding PAM into a flocculation chamber of the air flotation zone and a flocculation chamber of the floating and sinking zone.

Furthermore, the pressurized dissolved air water is discharged from the floating and sinking area, and the return pipe is connected to a pressurized water pump between the devices.

The device of the utility model has the following beneficial effects:

(1) the combined process of air flotation, MBBR and floating and sinking is adopted, so that various pollutants can be effectively removed, the removal efficiency is high, and the requirement on multi-water treatment is met.

(2) The integrated device saves investment, occupies small area, reduces operation and maintenance cost, and has compact and beautiful integral mechanism.

(3) The air flotation and the floating sedimentation are arranged for mixing and flocculation, and the dosage can be adjusted according to the actual concentration of the suspended matters in the inlet water, so that the air flotation separation can be effectively carried out.

(4) The middle upper part of the floating and sinking area is provided with the inclined pipe/plate, which is beneficial to improving the sedimentation effect of the falling biological mud film and leading the suspended particles with larger specific gravity to sink into the bottom.

(5) In the MBBR biological reaction zone, the volume load of the biological reaction zone is improved by adding the suspended filler, and the impact load resistance can be realized by adjusting the filler adding rate. The upper part of the aeration component of the MBBR biological reaction zone is provided with the filler supporting pore plate, so that the blockage of the aeration head can be effectively prevented.

(6) The device provided by the utility model is stable in operation, convenient to manage, easy to integrate, and has the advantages of rapidness, safety, high efficiency and the like, and has a relatively high application prospect in the field of water treatment.

Drawings

FIG. 1 is a schematic plan view of an integrated sewage treatment plant combining air floatation, MBBR and floating and sinking

FIG. 2 is a schematic sectional view of the air bearing region in FIG. 1

FIG. 3 is a schematic sectional view of the MBBR region of FIG. 1

FIG. 4 is a schematic cross-sectional view of the sink-float zone of FIG. 1

FIG. 5 schematic view of a packing support orifice plate

The system comprises a gas flotation zone A, a B-MBBR biological reaction zone C-a floating and sinking zone, a sludge temporary storage zone D, an equipment room E, a mixing chamber a, a flocculation chamber B, a contact chamber D, a separation chamber E, a slag discharge groove E and a water outlet chamber f.

1-water inlet pipe, 2-mixing stirrer, 3-flocculation stirrer, 4-pressurized dissolved air inlet pipe, 5-dissolved air releaser, 6-slag scraper, 7-perforated water collecting pipe, 8-perforated static pressure sludge discharging pipe, 9-slag discharging pipe, 10-interception screen, 11-aeration pipe, 12-disc aerator, 13-suspension filler, 14-filler supporting orifice plate, 15-backflow pipe, 16-water outlet pipe, 17-inclined pipe/plate, 18-pressurized water pump, 19-air compressor, 20-dissolved air tank, 21-aeration equipment, 22-PAC dosing system, 23-PAM dosing system, 24-control system, 25-sludge stirrer.

Detailed Description

The following explains and analyzes the implementation process of the present invention with reference to the drawings:

the air flotation mainly utilizes micro bubbles in dissolved air water generated by a dissolved air system to be bonded with suspended matter floc in the water, and the suspended matter rises to the water surface along with the micro bubbles to form scum, so that the suspended floc in the water is removed. For flocculating constituents with larger particle density which are difficult to remove and impurities with large particle density to be removed, the effect of treating by utilizing the inclined tube/plate sedimentation tank is ideal, and the advantages of air floatation and inclined tube/plate sedimentation are combined in floating and sinking.

Moving-bed-biofilm reactors (MBBR for short) are widely used in various integrated sewage treatment plants as a typical process. The core part of the MBBR is a process that suspended fillers with specific gravity close to water are directly added into an aeration tank to be used as active carriers of microorganisms, the MBBR is in a fluidized state under the action of aeration in the aeration tank and the lifting action of water flow, and the MBBR is combined with an activated sludge method of suspended growth and a biofilm method of attached growth, and has higher volume load.

Therefore, the integrated treatment device is adopted by utilizing the combined technology of air flotation, MBBR and floating and sinking, has the characteristics of investment saving, high removal rate, treatment time reduction, small occupied area, operation and maintenance cost reduction, compact and attractive whole mechanism and is a set of comprehensive high-efficiency treatment device. The method provides practical significance for decentralized rural sewage treatment and river emergency treatment.

As shown in figures 1 to 5, the integrated sewage treatment device combining air floatation, MBBR and floating and sinking comprises: an air flotation zone A, MBBR biological reaction zone B, a floating and sinking zone C, a sludge temporary storage zone D and a device room E. The integrated sewage treatment device combining air floatation, MBBR and floating and sinking and the treatment method thereof have the general flow: sewage is conveyed to an air flotation zone A through a water inlet pipe 1, effluent after passing through the air flotation zone A enters an MBBR biological reaction zone B through holes, sewage after biological treatment enters a floating and sinking zone C through the holes, and effluent after passing through the floating and sinking zone C is discharged through a water outlet pipe 16.

The sewage enters an air flotation zone A and sequentially passes through a mixing chamber a, a flocculation chamber b, a contact chamber c, a separation chamber d, a slag discharge groove e and a water outlet chamber f. Mixing the sewage with PAC in a mixing chamber a, and flocculating with PAM in a flocculation chamber b; suspended particles in the sewage are adhered with micro-bubbles generated by dissolved gas in the contact chamber c and rise to the water surface, and scum rising to the water surface is scraped to a scum discharging groove e in the separation chamber d through a scum scraper 6; the sewage is collected to the water outlet chamber f through the perforated water collecting pipe 7; collecting bottom sludge to a sludge temporary storage area D through a perforated static pressure sludge discharge pipe 8; the sewage is communicated with the MBBR biological reaction zone B through the holes by the water outlet chamber f. The mixing chamber a is provided with a mixing stirrer 2 and PAC is added; the flocculation chamber b is provided with a flocculation stirrer 3 and PAM is added; the contact chamber c is provided with a pressurized dissolved air inlet pipe 4 and a dissolved air releaser 5; the top of the separation chamber d is provided with a slag scraper 6, the middle part is provided with a perforated water collecting pipe 7, and the bottom is provided with a perforated static pressure mud discharging pipe 8; the slag discharging groove e is provided with a slag discharging pipe 9.

Sewage enters an MBBR biological reaction zone B through a water inlet pipeline, suspended fillers 13 are added into the MBBR biological reaction zone B, aeration is carried out through an aeration component, organic pollutants are degraded by microorganisms attached to the suspended fillers 13, and the sewage enters a sinking and floating zone C through a water outlet pipeline after certain retention time. The water inlet pipeline and the water outlet pipeline are provided with a filler intercepting screen 10; the suspension filler 13 is made of HDPE material; the aeration component adopts an EPDM disc type aerator 12. In addition, a filler supporting orifice 14 is arranged at the upper part of the aeration assembly of the MBBR biological reaction zone B. Preferably, the aperture of the filler supporting pore plate 14 is 50mm, and the installation height of the filler supporting pore plate 14 is 600mm higher than the bottom of the pool. Preferably, the packing support orifice 14 is liftably mounted.

The sewage enters a floating and sinking zone C and sequentially passes through a mixing chamber a, a flocculation chamber b, a contact chamber C, a separation chamber d, a slag discharge groove e and a water outlet chamber f. Mixing the sewage with PAC in a mixing chamber a, and flocculating with PAM in a flocculation chamber b; the falling biological mud film in the sewage is adhered with micro bubbles generated by dissolved gas in the contact chamber c and rises to the water surface, and scum rising to the water surface is scraped to a scum discharging groove e in the separation chamber d through a scum scraper 6; the sewage is collected to the water outlet chamber f through the perforated water collecting pipe 7; collecting bottom sediment sludge to a sludge temporary storage area D through a perforated static pressure sludge discharge pipe 8; the waste water is discharged through outlet pipe 16 via outlet chamber f. The mixing chamber a is provided with a mixing stirrer 2 and PAC is added; the flocculation chamber b is provided with a flocculation stirrer 3 and PAM is added; the contact chamber c is provided with a pressurized dissolved air inlet pipe 4 and a dissolved air releaser 5; the top of the separation chamber d is provided with a slag scraper 6, the middle upper part is provided with an inclined pipe/plate 17, the middle lower part is provided with a perforated water collecting pipe 7, and the bottom is provided with a perforated static pressure mud pipe 8; the slag discharging groove e is provided with a slag discharging pipe 9. The outlet chamber is provided with a return pipe 9.

The return pipe 9 is connected to a pressurized water pump 18 of the equipment room E, and the pressurized gas-dissolving water utilizes the effluent of the floating and sinking area C.

The sludge temporary storage area D is provided with sludge stirring 25.

And the sludge in the air flotation zone A and the floating and sinking zone C is connected to a sludge temporary storage zone D through a static pressure sludge discharge pipe 8.

The equipment room E comprises: air supporting equipment, aeration equipment, medicine adding equipment and a control system.

The air floatation device comprises: an air compressor 19, a pressurized water pump 18 and a dissolved air tank 20. The air compressor 19 and the pressurized water pump 18 are connected to a dissolved air tank 20. The dissolved air tank 20 is connected to a pressurized dissolved air inlet pipe 4 and a dissolved air releaser 5 in the air flotation zone A, and a pressurized dissolved air inlet pipe 4 and a dissolved air releaser 5 in the floating and sinking zone C.

The medicine adding equipment comprises: PAC dosing system 22, PAM dosing system 23. PAC is added into a mixing chamber a of the air flotation zone A and a mixing chamber a of the floating and sinking zone C, and PAM is added into a flocculation chamber b of the air flotation zone A and a flocculation chamber b of the floating and sinking zone C.

The aeration device 21 is connected to the MBBR biological reaction zone B aeration component 12 through an aeration pipe 11.

The control system employs a PLC control system 24.

It should be noted that each water storage partition of the present invention needs to be provided with an emptying pipe.

Sewage can carry out effective processing to the pollutant through above-mentioned implementation process, is applicable to decentralized rural sewage treatment to and the river course emergency treatment of non-fixed date, fixed place. The treatment device has the advantages of simple operation, high pollutant removal efficiency, small equipment investment, low treatment cost, wide application range and the like, has considerable potential application prospect, and is expected to be widely popularized and applied in the water body pollution treatment process in the future.

The present invention has been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Many other changes and modifications may be made without departing from the spirit and scope of the utility model and should be considered as within the scope of the utility model.

Claims

1. The utility model provides an integration sewage treatment plant that air supporting, MBBR and float and sink ally oneself with usefulness which characterized in that: the device comprises: the device comprises a box body, wherein an air flotation zone, an MBBR biological reaction zone, a floating and sinking zone, a sludge temporary storage zone and a device room are arranged in the box body;

the air flotation zone comprises: the mixing chamber, the flocculation chamber, the contact chamber, the separation chamber, the slag discharge groove and the water outlet chamber are sequentially communicated; a mixing stirrer is arranged in the mixing chamber, and PAC is added; the flocculation chamber is provided with a flocculation stirrer and PAM is added; the contact chamber is provided with a pressurized dissolved air water inlet pipe and a dissolved air releaser; the top of the separation chamber is provided with a slag scraper, the middle part of the separation chamber is provided with a perforated water collecting pipe, and the bottom of the separation chamber is provided with a perforated static pressure mud pipe; the slag discharging groove is provided with a slag discharging pipe; the water outlet chamber is communicated with the MBBR biological reaction zone through a pipeline;

the MBBR biological reaction zone comprises: an aeration tank having a water inlet conduit and a water outlet conduit; an aeration component and a suspended filler are arranged in the aeration tank; the water inlet pipeline and the water outlet pipeline are provided with filler intercepting screens;

the floating and sinking zone comprises: the mixing chamber, the flocculation chamber, the contact chamber, the separation chamber, the slag discharge groove and the water outlet chamber are sequentially communicated; a mixing stirrer is arranged in the mixing chamber, and PAC is added; the flocculation chamber is provided with a flocculation stirrer and PAM is added; the contact chamber is provided with a pressurized dissolved air inlet pipe and a dissolved air releaser; the top of the separation chamber is provided with a slag scraper, the middle upper part of the separation chamber is provided with an inclined pipe area, the middle lower part of the separation chamber is provided with a perforated water collecting pipe, and the bottom of the separation chamber is provided with a perforated static pressure mud pipe; the slag discharging groove is provided with a slag discharging pipe; the water outlet chamber is provided with a water outlet pipe and a return pipe.

2. The integrated sewage treatment plant combining air flotation, MBBR and floating and sinking as claimed in claim 1, wherein: and a filler supporting pore plate is arranged at the upper part of the aeration component.

3. The integrated sewage treatment plant combining air flotation, MBBR and floating and sinking as claimed in claim 1, wherein: the sludge temporary storage area is provided with a stirrer; and the sludge in the air flotation zone and the floating and sinking zone is connected to the temporary sludge storage zone through a static pressure sludge discharge pipe.

4. The integrated sewage treatment plant combining air flotation, MBBR and floating and sinking as claimed in claim 1, wherein: the equipment room is provided with: the air flotation device, the aeration device, the dosing device and the control system; the air floatation device comprises: an air compressor, a pressure water pump and a dissolved air tank; the medicine adding equipment comprises: PAC and PAM feeding systems; wherein the air compressor and the pressurized water pump are connected to the dissolved air tank; the dissolved air tank is connected to a pressurized dissolved air inlet pipe and a dissolved air releaser of the air flotation tank, and a pressurized dissolved air inlet pipe and a dissolved air releaser of the floating and sinking tank; the aeration equipment is connected to the MBBR biological reaction zone aeration component.

5. The integrated air flotation, MBBR and sink-float sewage treatment plant of claim 4, wherein: and the drug adding equipment is used for adding PAC into a mixing chamber of an air flotation zone and a mixing chamber of a floating and sinking zone, and adding PAM into a flocculation chamber of the air flotation zone and a flocculation chamber of the floating and sinking zone.

6. The integrated air flotation, MBBR and sink-float sewage treatment plant of claim 4, wherein: the pressurized dissolved gas water is discharged from the floating and sinking area, and the return pipe is connected to a pressurized water pump between the devices.