CN113060833A - Biological flow bed aeration biological filter domestic sewage treatment equipment - Google Patents

Abstract

The invention provides a domestic sewage treatment device of a biological flow bed aeration biological filter, which comprises a biological flow bed contact oxidation area, a hydrolysis acidification area, a central flow guide type sedimentation area, a biological flow bed aeration filtering area, a sand filtering area, a clear water area and a device room which are sequentially arranged, wherein water flows from the biological flow bed contact oxidation area, flows through the hydrolysis acid area, the central flow guide type sedimentation area, the biological flow bed aeration filtering area, the sand filtering area and the clear water area and then is discharged, the hydrolysis acidification area is communicated with the outer space of the central flow guide type sedimentation area, and the device room is positioned at the tail part of the whole sewage treatment device. According to the biological flowing bed aeration biological filter domestic sewage treatment equipment, the domestic sewage treatment equipment is divided into the single functional areas, and the single functional areas are combined together during use, so that the domestic sewage treatment equipment is convenient to transport and install, the infrastructure occupation area of infrastructure is reduced, and the occupied area is reduced.

Description

Biological flow bed aeration biological filter domestic sewage treatment equipment

Technical Field

The invention relates to the technical field of sewage treatment, in particular to domestic sewage treatment equipment with a biological flow bed aeration biological filter.

Background

In view of the dispersed living in rural areas, although centralized regulation exists, the cost of the pipe network is high, and the laying of the pipe network is determined by actual conditions and cannot reach 100 percent of all-directional coverage; at present, septic tanks (sewage tanks) are built in the rural sewage treatment part, but only the septic tanks (sewage tanks) are used for treatment, and the quality of effluent cannot reach the standard and is discharged.

The existing sewage treatment facilities have large occupied area, are inconvenient to install and maintain, have high energy consumption and poor economical efficiency, and cannot be suitable for low-cost life in rural areas. Therefore, research and development of economic rural domestic sewage treatment equipment are urgently needed to meet the requirements of small occupied area, stable and standard effluent quality, convenience in installation, low energy consumption and operation cost and simplicity and convenience in management and maintenance of rural domestic sewage treatment facilities.

Disclosure of Invention

The invention aims to provide domestic sewage treatment equipment of a biological flow bed aeration biological filter tank, which aims to solve the problems that the existing sewage treatment equipment is large in occupied area and inconvenient to install and maintain.

The invention provides a domestic sewage treatment device of a biological flow bed aeration biological filter, which comprises a biological flow bed contact oxidation area, a hydrolysis acidification area, a central flow guide type sedimentation area, a biological flow bed aeration filtering area, a sand filtering area, a clear water area and a device room which are sequentially arranged, wherein water flows from the biological flow bed contact oxidation area, flows through the hydrolysis acid area, the central flow guide type sedimentation area, the biological flow bed aeration filtering area, the sand filtering area and the clear water area and then is discharged, the hydrolysis acidification area is communicated with the outer space of the central flow guide type sedimentation area, and the device room is positioned at the tail part of the whole sewage treatment device.

According to the biological flowing bed aeration biological filter domestic sewage treatment equipment, the domestic sewage treatment equipment is divided into the single functional areas, and the single functional areas are combined together during use, so that the domestic sewage treatment equipment is convenient to transport and install, the infrastructure occupation area of infrastructure is reduced, and the occupied area is reduced.

Further, the biological fluidized bed contact oxidation zone comprises a first box body, a biological spherical filler interception net arranged in the first box body, a first biological spherical filler, three fluidized beds, a perforation aeration system, a sludge return pipe arranged at the top of the first box body and an emptying pipe; the bottom of the first box body is provided with a bottom water outlet which is communicated with the hydrolysis acidification zone.

Further, the hydrolysis acidification zone comprises a second box body and an intermittent stirring device, an upper water outlet is formed in the upper side of the second box body, and the upper water outlet is connected with the central diversion type sedimentation zone.

Furthermore, the central flow-guiding type settling zone comprises a third box body, and a water passing pipe, a central flow-guiding cylinder, a sludge gas-stripping reflux device, a peripheral overflow weir and an uniform water distribution pipe which are arranged in the third box body, wherein the third box body is respectively provided with a sludge collecting port and a sludge discharge port at the position corresponding to the sludge gas-stripping reflux device; the lower end of the uniform water distribution pipe is provided with a sludge collecting port, and the sludge gas stripping reflux device extends out of the top plate of the third box body and is communicated with the sludge reflux pipe.

Furthermore, the biological fluidized bed aeration filtering area comprises a fourth box body, and a water inlet weir plate, a biological fluidized bed partition plate, a second biological spherical filler, a ceramic filter material, a filter material bottom support plate, a back-flushing drainage overflow weir and a first water outlet chamber which are arranged in the fourth box body, wherein a water outlet is arranged at the position of the fourth box body corresponding to the first water outlet chamber.

Furthermore, the first water outlet chamber comprises a micropore aeration system, a water outlet system, a first backwashing water distribution system and a first backwashing gas distribution system, the water outlet system is provided with a gas stripping pipeline, and the water outlet system is connected with the sand filtration area.

Furthermore, the sand filtration area comprises a fifth box body, and a sand filtration layer, a sand filtration bottom supporting plate and a second water outlet chamber which are arranged in the fifth box body, wherein the second water outlet chamber mainly comprises a second backwashing water distribution system, a second backwashing gas distribution system and a water outlet pipeline, and the water outlet pipeline is connected with the clean water area.

Furthermore, the back-washing water inlet is arranged on one side of the clean water area communicated with the sand filtering area, and the main water outlet is arranged on the other side of the clean water area.

Furthermore, the equipment room comprises an electric control system, an aeration system, a back washing system and an air exhaust system.

Further, the inter-equipment air exhaust system includes an axial flow fan.

Drawings

FIG. 1 is a schematic front view of a biological fluid bed aeration biological filter domestic sewage treatment apparatus according to a first embodiment of the present invention;

FIG. 2 is a schematic top view of the clean water zone of the biological fluid bed aeration biological filter domestic sewage treatment equipment in FIG. 1.

Description of the main element symbols:

the following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention provides a biological flow bed aeration biological filter domestic sewage treatment device which comprises a biological flow bed contact oxidation area 1, a hydrolysis acidification area 2, a central flow guide type sedimentation area 3, a biological flow bed aeration filtering area 4, a sand filtering area 5, a clear water area 7 and a device room 6 which are arranged in sequence, wherein water flows through the hydrolysis acid area 2, the central flow guide type sedimentation area 3, the biological flow bed aeration filtering area 4, the sand filtering area 5 and the clear water area 7 from the biological flow bed contact oxidation area 1 and then flows out, the hydrolysis acidification area 2 is communicated with the outer space of the central flow guide type sedimentation area 3, and the device room 6 is positioned at the tail part of the whole sewage treatment device.

According to the biological flowing bed aeration biological filter domestic sewage treatment equipment, the domestic sewage treatment equipment is divided into the single functional areas, and the single functional areas are combined together during use, so that the domestic sewage treatment equipment is convenient to transport and install, the infrastructure occupation area of infrastructure is reduced, and the occupied area is reduced.

Specifically, in this embodiment, the biological fluidized bed contact oxidation zone 1 includes a first tank 10, a biological spherical filler interception net 100 disposed in the first tank 10, a first biological spherical filler 102, a three-phase fluidized bed 101, a perforated aeration system 103, a sludge return pipe 104 disposed at the top of the first tank 10, and an emptying pipe 105; the bottom of the first box 10 is provided with a bottom water outlet (not shown), the bottom water outlet is communicated with the hydrolysis acidification zone 2, and an aeration pipe of the perforation aeration system 103 enters from the top grid cover plate and is connected with the perforation aeration system 103 at the bottom.

Specifically, in this embodiment, the hydrolysis-acidification zone 2 includes a second tank 20 and an intermittent stirring device 201, an upper water outlet 202 is disposed on the upper side of the second tank 20, and the upper water outlet 202 is connected to the central diversion-type settling zone 30.

Specifically, in this embodiment, the central diversion type settling zone 3 includes a third tank 30, and a water pipe (not shown in the figure), a central diversion cylinder (not shown in the figure), a sludge gas stripping reflux device 302, a sludge collection port (not shown in the figure), a sludge discharge port (not shown in the figure), a peripheral overflow weir (not shown in the figure), and a uniform water distribution pipe 301, which are disposed in the third tank 30; the lower end of the uniform water distribution pipe 301 is provided with a sludge collecting port 303, and the sludge gas stripping reflux device 302 extends out from the top plate of the third box 30 and is communicated with the sludge reflux pipe 104. Sewage enters from the upper part of the central guide cylinder, is uniformly distributed by the central guide cylinder, is uniformly and slowly distributed on the cross section of the third box body 30 from the bottom of the central guide cylinder after passing through the reflecting plate, and the water outlets of the third box body 30 are arranged on the peripheral overflow weir and are communicated with the biological flowing bed aeration filtering area 4.

Sewage enters the central diversion type settling zone 3 from the upper part of the hydrolysis acidification zone 2 through a pipeline, sludge generated in the central diversion type settling zone 3 flows back to the biological flowing bed contact oxidation zone 1 through a sludge collection port 303 by utilizing a sludge gas stripping reflux device 302, or is stripped to a septic tank for periodic treatment.

Specifically, in this embodiment, the biological fluidized bed aeration filtering area 4 includes a fourth tank 40, and a water inlet weir plate (not shown), a biological fluidized bed partition plate 401, a second biosphere packing 402, a ceramic filter material 403, a filter material bottom support plate (not shown), a backwash drainage overflow weir (not shown), and a first water outlet chamber 404 that are disposed in the fourth tank 40, and a water outlet is disposed at a position of the fourth tank 40 corresponding to the first water outlet chamber 404.

Specifically, in this embodiment, the first water outlet chamber 404 includes a micro-pore aeration system (not shown), a water outlet system (not shown), a first backwashing water distribution system (not shown), and a first backwashing gas distribution system (not shown), the water outlet system is provided with a gas stripping pipeline (not shown), and the water outlet system is connected to the sand filtration area 5.

Specifically, in this embodiment, the sand filtering area 5 includes a fifth box 50, and a sand filtering layer (not shown in the figure), a sand filtering bottom supporting plate 503, and a second water outlet chamber (not shown in the figure) disposed in the fifth box 50, where the second water outlet chamber (not shown in the figure) mainly includes a second backwashing water distribution system (not shown in the figure), a second backwashing gas distribution system (not shown in the figure), and a water outlet pipeline (not shown in the figure), and the water outlet pipeline is connected to the clean water area 7. Wherein the sand screen of the sand screen zone comprises quartz sand 502 and a gas outlet pipe 501 connected to the first outlet chamber 404. The supernatant fluid of the sludge-water separation of the sewage from the central diversion type settling zone 3 automatically flows into the biological flow bed aeration filtering zone 4, the sewage passes through the biological flow bed partition plate 401, then sequentially passes through the biological spherical filler 402, the ceramic filter material 403 and the water outlet chamber 404, and then enters the sand filtering zone 5 from the water outlet chamber 404 through the air stripping water outlet pipe 501. The sewage enters from the upper part of the sand filtering area 5 through the quartz sand 502, and the water at the bottom of the sand filtering area 5 enters the clear water area 7 through the water outlet pipe, and finally reaches the standard through the main water outlet 705 for discharge.

Specifically, in this embodiment, one side of the clean water area 7, which is communicated with the sand filtration area 5, is provided with the backwash water inlet (not shown), the other side of the clean water area 7 is provided with a main water outlet 705 to discharge filtered clean water, one side of the clean water area 7 is provided with an inspection stair 701 to detect the condition of the upper end of the clean water area 7, the upper end of the clean water area 7 is provided with a glass grating cover plate 702, the upper side of the clean water area 7 is provided with a discharge port 703, and the main water inlet 704 is further provided, which is communicated with the sand filtration area 5, so that water in the sand filtration area 5 enters the clean water area 7. Domestic sewage treated by the sewage tank automatically flows into the biological flowing bed contact oxidation area 1 through the main water inlet 704, the three fluidized beds 101, the biological spherical packing 102 and the perforation aeration system 103 are arranged in the biological flowing bed contact oxidation area 1, the sewage enters the hydrolysis acidification area 2 from the bottom of the biological flowing bed contact oxidation area 1, and the intermittent stirring device 201 is arranged in the hydrolysis acidification area 2, so that activated sludge deposition can be prevented.

Specifically, in this embodiment, the plant room 6 includes an electric control system (not shown), an aeration system (not shown), a back-flushing system (not shown), and an air exhaust system (not shown). The electric control system is used for controlling the mechanical equipment of the whole integrated equipment to be started; the aeration system is connected with the perforated aeration system 103 of the biological fluidized bed contact oxidation zone 1, the intermittent stirring device of the hydrolysis acidification zone 2, the sludge gas stripping reflux device 302 of the central diversion type sedimentation zone 3, the microporous aeration system, the back-flushing gas distribution system and the effluent gas stripping system of the biological fluidized bed aeration filtration zone 4, and the back-flushing gas distribution system of the sand filtration zone 5; the inlet end of the back washing system is connected with the clear water area 7, and the water outlet of the back washing system is connected with the back washing water distribution system of the biological flowing bed aeration filtering area 4 and the back washing water distribution system of the sand filtering area in parallel; the air exhaust system is used for axially and symmetrically exhausting air.

Specifically, in the present embodiment, the inter-equipment 6 air exhaust system includes an axial flow fan 601. The upper surface of the equipment is made of steel plates or glass steel materials, and residual gas generated in the process of technological reaction and generated by air stirring can be discharged outside, so that the water leakage condition of the equipment with overlarge internal pressure intensity is avoided. Meanwhile, the requirements of different conditions can be met to a great extent.

When the reactor is operated, domestic sewage enters the biological flowing bed contact oxidation zone 1 from the main water inlet 704, a fluidized bed process combining the biological spherical filler 102, the three fluidized beds 101 and the perforation aeration system 103 is adopted to form a highly-obligate active biological membrane, and a plurality of reaction sections can be sequentially arranged along the water flow direction to meet various treatment targets for carbonization, nitrification, preposition or postposition denitrification reaction. Can effectively reduce organic matters, ammonia nitrogen, total phosphorus and total nitrogen in the biochemical sewage. Effluent automatically flows into the hydrolysis acidification tank 2, the activated sludge deposition of the hydrolysis acidification tank is avoided through intermittent stirring, and the problem of insufficient carbon source when denitrification is carried out in the hydrolysis acidification tank is effectively solved by adopting an inverted A/O process without carrying out digestive juice backflow. Effluent automatically flows into a central diversion type sedimentation zone 3, after uniform water distribution through a water inlet pipe and a central diversion cylinder, mud and water are separated, one part of sludge flows back to a biological fluidized bed contact oxidation zone 1 through air stripping to supplement sludge, which is accurate for phosphorus removal, and the other part of sludge flows back to a septic tank for periodic cleaning; the supernatant automatically flows into the biological fluidized bed aeration filtering area 4 through the overflow weir, the biological fluidized bed aeration filtering area 4 adopts the combination of the biological spherical filler 402 and the ceramic filter material 403 to form a highly-specific active biological membrane in the biological fluidized bed aeration filtering area, the treatment efficiency of the unit volume of the biological fluidized bed aeration filtering area 4 can be improved, the process stability is increased, and the volume of the biological fluidized bed aeration filtering area 4 is reduced; the water outlet system is provided with the air stripping pipeline 501, so that the problem that the water level of the front section rises due to the reduction of the filtering speed in the operation process can be effectively solved. The biological fluidized bed aeration filtering area 4 can further effectively reduce organic matters, ammonia nitrogen, total phosphorus and total nitrogen in the biochemical sewage. The effluent automatically flows into a sand filter 5, and SS (suspended solids), organic matters and total phosphorus in the wastewater are further removed under the action of quartz sand 502. The effluent enters a clear water zone 7, and the clear water zone 7 mainly provides backwashing water for the biological fluidized bed aeration filtering zone 4 and the sand filtering zone 5. And finally, the final effluent reaches the discharge standard GB18918-2002 first-class A of discharge standard through a total discharge port 705 of a clear water area.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The domestic sewage treatment equipment is characterized by comprising a biological flow bed contact oxidation area, a hydrolysis acidification area, a central flow guide type sedimentation area, a biological flow bed aeration filtering area, a sand filtering area, a clear water area and an equipment room which are sequentially arranged, wherein water flows through the hydrolysis acid area, the central flow guide type sedimentation area, the biological flow bed aeration filtering area, the sand filtering area and the clear water area from the biological flow bed contact oxidation area and then flows out, the hydrolysis acidification area is communicated with the outer space of the central flow guide type sedimentation area, and the equipment room is positioned at the tail part of the whole sewage treatment equipment.

2. The biological flow bed aeration biological filter domestic sewage treatment equipment according to claim 1, wherein the biological flow bed contact oxidation zone comprises a first box body, a biological spherical filler interception net, a first biological spherical filler, three fluidized beds, a perforated aeration system, a sludge return pipe and an emptying pipe, wherein the biological spherical filler interception net, the first biological spherical filler, the three fluidized beds, the perforated aeration system, the sludge return pipe and the emptying pipe are arranged in the first box body; the bottom of the first box body is provided with a bottom water outlet which is communicated with the hydrolysis acidification zone.

3. The biological flow bed biological aerated filter domestic sewage treatment equipment according to claim 1, wherein the hydrolysis acidification zone comprises a second box body and an intermittent stirring device, an upper water outlet is arranged on the upper side of the second box body, and the upper water outlet is connected with the central diversion type sedimentation zone.

4. The domestic sewage treatment equipment of a biological flow bed aeration biological filter according to claim 2, wherein the central diversion type settling zone comprises a third box body, and a water passing pipe, a central diversion cylinder, a sludge air-stripping reflux device, a peripheral overflow weir and a uniform water distribution pipe which are arranged in the third box body, and the third box body is respectively provided with a sludge collection port and a sludge discharge port at the position corresponding to the sludge air-stripping reflux device; the lower end of the uniform water distribution pipe is provided with a sludge collecting port, and the sludge gas stripping reflux device extends out of the top plate of the third box body and is communicated with the sludge reflux pipe.

5. The apparatus of claim 1, wherein the biological fluid bed aeration biological filter tank domestic sewage treatment apparatus comprises a fourth tank, and a water inlet weir plate, a biological fluid bed partition plate, a second bio-spherical filler, a ceramic filter material, a filter material bottom support plate, a back-flushing water discharge overflow weir and a first water outlet chamber which are arranged in the fourth tank, and a water outlet is arranged at a position of the fourth tank corresponding to the first water outlet chamber.

6. The apparatus of claim 5, wherein the first outlet chamber comprises a microporous aeration system, an outlet system, a first backwashing water distribution system and a first backwashing gas distribution system, the outlet system is provided with a gas stripping pipeline, and the outlet system is connected with the sand filtration zone.

7. The biological flow bed aeration biological filter domestic sewage treatment equipment according to claim 1, wherein the sand filtration zone comprises a fifth box body, and a sand filtration layer, a sand filtration bottom supporting plate and a second water outlet chamber which are arranged in the fifth box body, the second water outlet chamber mainly comprises a second backwashing water distribution system, a second backwashing gas distribution system and a water outlet pipeline, and the water outlet pipeline is connected with the clean water zone.

8. The apparatus for treating domestic sewage in a biological flow bed aerated biological filter according to claim 1, wherein the back flush water inlet is provided at one side of the clean water zone communicated with the sand filtration zone, and the main water outlet is provided at the other side of the clean water zone.

9. The apparatus for treating domestic sewage in a biological flow bed aeration biological filter according to claim 1, wherein the apparatus room comprises an electric control system, an aeration system, a back washing system and an air exhaust system.

10. A biological flow bed biological aerated filter domestic sewage treatment apparatus according to claim 9, wherein the inter-apparatus air exhaust system comprises an axial fan.

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