CN113321387A

CN113321387A - Short-flow agricultural sewage integrated sewage treatment reaction equipment

Info

Publication number: CN113321387A
Application number: CN202110786143.XA
Authority: CN
Inventors: 姜维; 张广学; 孙临泉; 陈光耀; 薛蔚琦; 肖倩; 蒋
Original assignee: Ouji Shanghai Environmental Protection Technology Co ltd; Shenzhen Runke Environmental Protection Application Technology Research Co ltd
Current assignee: Ouji Shanghai Environmental Protection Technology Co ltd; Shenzhen Runke Environmental Protection Application Technology Research Co ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-08-31

Abstract

The invention provides a short-flow agricultural and sewage integrated sewage treatment reaction equipment, comprising a pre-anoxic zone, anoxic zone, an aerobic zone, a biochemical precipitation zone and a first mud storage zone that are communicated in sequence; and also includes a coagulation zone that communicates in sequence A sedimentation zone and a second sludge storage zone, the biochemical sedimentation zone is also connected with the coagulation sedimentation zone; further comprising a first stripper for driving the mixed liquid to flow from the aerobic zone to the pre-anoxic zone and a The sludge in the first sludge storage zone is driven back to the second stripper in the pre-anoxic zone. Taking the air stripper as the power source, the three functional units of biochemical reaction, chemical phosphorus removal and SS removal are all concentrated into one reaction equipment, which effectively solves the problem of seasonal and diurnal water quality and water quantity changes, and simplifies daily operation management. , but also improve the system processing capacity and processing efficiency, while reducing investment.

Description

Short-flow agricultural sewage integrated sewage treatment reaction equipment

Technical Field

The invention relates to the technical field of sewage treatment, in particular to short-flow agricultural sewage integrated sewage treatment reaction equipment.

Background

Aiming at the construction of beautiful villages, rural domestic sewage is generally deficient due to relatively small treatment scale, professional technicians are greatly changed seasonally and day and night in water quality and water quantity, and the technical characteristics and the technical current situation of rural domestic sewage are difficult to adapt to by completely applying a municipal sewage treatment process scheme, so that a novel rural sewage treatment process technical route with short flow, extensive management, unattended type and weak dependence on professional technicians is urgently needed to be developed.

At present, the common method for treating domestic and rural sewage still applies a municipal sewage treatment process route, and a biochemical unit, a chemical phosphorus removal unit and an SS (suspended solid) filtration unit are designed in an independent and separate mode, so that the process flow is longer, more control points are provided, more power equipment is provided, the accident rate is higher, the investment and maintenance cost is also high, and the dependence on professional maintenance technicians is stronger.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the sewage treatment process flow is shortened, and control points are reduced; realizes the integrated design and adapts to the technical characteristics and the technical current situation of rural domestic sewage.

In order to solve the technical problems, the invention adopts the technical scheme that:

a short-flow agricultural sewage integrated sewage treatment reaction device comprises a pre-anoxic zone, an aerobic zone, a biochemical precipitation zone and a first sludge storage zone which are sequentially communicated; the sludge treatment device also comprises a coagulating sedimentation area and a second sludge storage area which are sequentially communicated, and the biochemical sedimentation area is also connected with the coagulating sedimentation area; the system also comprises a first stripper used for driving the mixed liquor to flow from the aerobic zone to the pre-anoxic zone and a second stripper used for driving the sludge in the first sludge storage zone to flow back to the pre-anoxic zone.

The sludge in the second sludge storage area is driven to flow back to the coagulating sedimentation area through the first stripper; the pre-anoxic zone, the anoxic zone and the aerobic zone are adjacent in pairs; the bottom of the biochemical precipitation area is communicated with the first sludge storage area, and the upper part of the biochemical precipitation area is connected with the coagulating precipitation area through the biochemical water outlet pipe; and the bottom of the coagulating sedimentation area is communicated with the second sludge storage area.

Furthermore, the bottom parts of the aerobic zone and the first sludge storage zone are provided with an oxygenation aeration pipe; and stirrers are arranged at the bottoms of the pre-anoxic zone, the anoxic zone and the second sludge storage zone.

Further, still contain charge device, the coagulating sedimentation district is provided with fast and mixes the check, the delivery port of biochemical outlet pipe, charge device's play medicine mouth and the mud outlet of third air stripping ware all are located fast mixes the check.

Further, the water-saving device also comprises a water inlet pipe and a water outlet pipe; the water outlet of the water inlet pipe is positioned in the pre-anoxic zone and/or the anoxic zone; and the water inlet of the water outlet pipe is positioned in the coagulating sedimentation area.

Further, the first sludge storage area is provided with a fourth air stripper for discharging sludge outwards, and the second sludge storage area is provided with a fifth air stripper for discharging sludge outwards; the stirrer is a perforated aeration pipe.

Furthermore, the second stores up the mud district, the coagulating sedimentation district the anoxic zone the aerobic zone biochemical sedimentation district and first store up the mud district and all be located on the same lateral wall in anoxic zone in advance, and arrange in proper order along the horizontal direction of this lateral wall.

Further, the aerobic zone is provided with a first protruding extension part which is positioned between the pre-anoxic zone and the biochemical precipitation zone; the water inlet of the first gas lift is positioned on the first protrusion extension part, and the water outlet of the first gas lift is positioned on the pre-anoxic zone; the first sludge storage area is provided with a second protruding extension part, and the biochemical precipitation area is positioned above the second protruding extension part; the second mud storage area is provided with a third protruding extension part, and the coagulating sedimentation area is located above the third protruding extension part.

Furthermore, the bottom of the biochemical precipitation area and the bottom of the coagulating sedimentation area are both provided with a precipitation device, and the bottom of the precipitation device is hopper-shaped.

Further, the outer profile is cylindrical; the aerobic zone is far away from one side of the pre-anoxic zone is further provided with a fourth protrusion extension part, and the aerobic zone and the communication position between the anoxic zones are located at the fourth protrusion extension part.

The invention has the beneficial effects that: the gas stripping device is used as a power source, three functional units of biochemical reaction, chemical phosphorus removal and SS removal are integrated into one reaction device, and the problem that seasonal and day-night water quality and water quantity change is difficult to process is effectively solved; the method simplifies daily operation management, improves the system treatment capacity and treatment efficiency, and reduces investment, thereby being particularly suitable for the current domestic integrated sewage treatment and having good popularization and application prospects.

Drawings

The detailed structure of the invention is described in detail below with reference to the accompanying drawings

FIG. 1 is a schematic cross-sectional structure diagram of a short-flow integrated sewage treatment reaction device;

FIG. 2 is a schematic sectional view of the short-flow integrated sewage treatment reactor;

the device comprises a pre-anoxic zone, a 2-anoxic zone, a 3-aerobic zone, a 31-first protruding extension part, a 32-fourth protruding extension part, a 4-biochemical precipitation zone, a 5-first sludge storage zone, a 51-second protruding extension part, a 6-coagulation precipitation zone, a 61-fast mixing grid, a 62-slow mixing grid, a 7-second sludge storage zone, a 71-third protruding extension part, an 8-biochemical water outlet pipe, a 9-water inlet pipe, a 10-water outlet pipe, a 11-first air stripper, a 12-second air stripper, a 13-third air stripper, a 14-fourth air stripper, a 15-fifth air stripper, a 16-precipitation device, a 17-medicine outlet, an 18-stirrer and a 19-oxygenation aeration pipe.

Detailed Description

The most key concept of the invention is as follows: by adopting the unique plane arrangement and combining with a special structural design form and utilizing the air lifting device taking air as a power source, three functional units of biochemical reaction, chemical phosphorus removal and SS removal are effectively integrated into one reaction device, and finally, the integrated structural design is realized.

In order to further explain the feasibility of the inventive concept, the detailed description of the embodiments according to the technical content, the constructional features, the objectives and the effects achieved will be described in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1 and 2, a short-flow integrated sewage treatment reaction device for agricultural sewage treatment comprises a pre-anoxic zone 1, an anoxic zone 2, an aerobic zone 3, a biochemical precipitation zone 4 and a first sludge storage zone 5 which are sequentially communicated; the system also comprises a coagulating sedimentation area 6 and a second sludge storage area 7 which are sequentially communicated, and the biochemical sedimentation area 4 is also connected with the coagulating sedimentation area 6; and the system also comprises a first stripper 11 for driving mixed liquor to flow from the aerobic zone 3 to the pre-anoxic zone 1 and a second stripper 12 for driving sludge in the first sludge storage zone 5 to flow back to the pre-anoxic zone 1.

The mixed liquor is formed by mixing sewage with return sludge from the first sludge storage area 5. The gas stripping device is used as a power source, three functional units of biochemical reaction, chemical phosphorus removal and SS removal are integrated into one reaction device, and the problem that seasonal and day-night water quality and water quantity change is difficult to process is effectively solved; the daily operation management is simplified, and the processing capacity and the processing efficiency of the system are improved.

Example 2

On the basis of the structure, the short-flow agricultural sewage integrated treatment reaction equipment also comprises a biochemical water outlet pipe 8 and a third air stripper 13 for driving the sludge in the second sludge storage area 7 to flow back to the coagulating sedimentation area 6; the pre-anoxic zone 1, the anoxic zone 2 and the aerobic zone 3 are adjacent to each other in pairs, the pre-anoxic zone 1 is communicated with the anoxic zone 2, and the anoxic zone 2 is communicated with the aerobic zone 3, namely the pre-anoxic zone 1 is communicated with the aerobic zone 3 through the anoxic zone 2, and the three form a communicating vessel; the bottom of the biochemical precipitation zone 4 is communicated with the first sludge storage zone 5, and the upper part of the biochemical precipitation zone 4 is connected with the coagulating sedimentation zone 6 through the biochemical water outlet pipe 8; the bottom of the coagulating sedimentation zone 6 is communicated with the second sludge storage zone 7, and the second sludge storage zone 7 is also connected with the coagulating sedimentation zone 6 through the third stripper 13; the first sludge storage area 5 is connected with the pre-anoxic area 1 through the second stripper 12.

Because the pre-anoxic zone 1 is communicated with the anoxic zone 2, and the anoxic zone 2 is communicated with the aerobic zone 3, a communicating vessel is formed among the pre-anoxic zone 1, the anoxic zone 2 and the aerobic zone 3. The sewage enters a pre-anoxic zone 1, and the mixed liquid in the zone gradually tends to an anoxic state because the microorganisms grow, metabolize and breathe to consume oxygen; based on the properties of the communicating vessel, the mixed liquor in the pre-anoxic zone 1 is digested, dissolved oxygen is reduced to be below 0.5mg/L, and then the mixed liquor flows to the anoxic zone 2. In the anoxic zone 2, the microorganisms perform anoxic denitrification to realize denitrification; again, based on the properties of the communicating vessel, the wastewater from the anoxic zone 2 flows to the aerobic zone 3. In the aerobic zone 3, after the mixed liquor recovers the aerobic metabolic state, the microorganisms carry out carbonization and nitration reactions, namely organic matter degradation and ammonia nitrogen nitration reactions in the sewage, so that the sewage is ensured to realize the stable standard discharge of the organic matter and the ammonia nitrogen. And one part of the effluent at the tail end of the aerobic zone 3 passes through the first stripper 11, one part of the mixed liquor at the tail end of the aerobic zone 3 flows back to the pre-anoxic zone 1, and the other part of the mixed liquor at the tail end of the aerobic zone 3 overflows to the biochemical precipitation zone 4 under the action of the second stripper 12. In the biochemical precipitation zone 4, the separated residual sludge enters the first sludge storage zone 5, and the clear water flows into the coagulation precipitation zone 6 through the biochemical water outlet pipe 8. Part of the activated sludge in the first sludge storage zone 5 is returned to the pre-anoxic zone 1 through the second stripper 12. Because the mixed liquid in the aerobic zone 3 and the activated sludge in the first sludge storage zone 5 flow back to the pre-anoxic zone 1, and the water level in the pre-anoxic zone 1 rises, part of the mixed liquid of sludge and water continuously participates in the cyclic reaction based on the property of the communicating vessel and combined with the first air stripper 11 and the second air stripper 12.

And the clear water flowing into the coagulating sedimentation area 6 through the biochemical water outlet pipe 8 is flocculated again to remove suspended matters and total phosphorus in the water, so that the total phosphorus and SS in the mixed liquid are stably discharged up to the standard, and the suspended matters enter the second sludge storage area 7 after being added with medicine and settled. Through the third air stripper 13, part of the sludge in the second sludge storage zone 7 flows back to the coagulating sedimentation zone 6 to be continuously mixed with clear water from the biochemical sedimentation zone 4, so that internal circulation is formed, the coagulation effect is increased, and the use of a phosphorus removing agent is reduced. In the short-flow agricultural sewage integrated treatment reaction equipment, the reciprocating flow of water is realized, and biochemical reaction and physicochemical reaction are organically connected in series to form a cyclic reaction chain which is repeated.

Through the gas stripping and lifting action of the first gas stripper 11, the second gas stripper 12 and the third gas stripper 13, functional units of biochemical reaction, chemical phosphorus removal, SS removal and the like are combined in a reaction device in series, and the integrated structural design is realized.

Example 3

On the basis of the structure, the bottom parts of the aerobic zone 3 and the first sludge storage zone 5 are provided with an oxygenation aeration pipe 19. The oxygen content of the aerobic zone 3 is improved through the oxygenation aeration pipe 19, and the organic matter degradation and the nitration reaction of ammonia nitrogen are accelerated. After the sludge separated from the biochemical precipitation zone 4 is transferred to the first sludge storage zone 5, air is introduced through the oxygen charging aeration pipe 19, so that the sludge can always keep high sludge activity under the aerobic condition, and meanwhile, organic matters and ammonia nitrogen remained in the sludge-water mixture can be continuously degraded, so that the sludge is always in a low-substrate hunger state; once the part of sludge in the starvation state with low substrate flows back to the front end of the biochemical unit, namely the pre-anoxic zone 1, the sludge inevitably has higher adsorption capacity, so that the treatment efficiency of a biochemical system is improved, and the sedimentation performance of the sludge is improved. Air is introduced into the first sludge storage area 5, secondary release of phosphorus can be inhibited, the adsorption performance of sludge is improved, and the quality of effluent is ensured to be continuously, stably and discharge after reaching the standard. The bottom of the pre-anoxic zone 1, the anoxic zone 2 and the second sludge storage zone 7 is provided with a stirrer 18, so that effective circulation of sewage and sludge is realized.

Example 4

On the basis of the structure, the device further comprises a dosing device, the coagulating sedimentation zone 6 is provided with a fast mixing grid 61, the water outlet of the biochemical water outlet pipe 8, the medicine outlet 17 of the dosing device and the sludge outlet of the third air stripper 13 are both positioned on the fast mixing grid 61, so that the rapid and sufficient mixing of sewage, sludge and phosphorus removing agent is realized. The dosing device is used for adding a phosphorus removal agent. The coagulating sedimentation zone 6 is also provided with a slow mixing grid 62, and sewage flows to the slow mixing grid 62 from the fast mixing grid 61 and then overflows to the main functional area of the coagulating sedimentation zone 6 for sedimentation separation.

Example 5

On the basis of the structure, the device also comprises a water inlet pipe 9 and a water outlet pipe 10; the water outlet of the water inlet pipe 9 is positioned above the pre-anoxic zone 1 and/or the anoxic zone 2; the water inlet of the water outlet pipe 10 is positioned above the coagulating sedimentation zone 6, the opening direction of the water inlet is upward, and water which reaches the discharge standard in the coagulating sedimentation zone 6 flows to the water outlet pipe 10 from the corresponding water inlet through overflow, namely, sewage can be discharged only after being subjected to biochemical reaction, chemical phosphorus removal and SS removal; the opening direction of the water inlet of the biochemical water outlet pipe 8 is upward, and the clean water in the biochemical precipitation area 4 flows to the biochemical water outlet pipe 8 from the corresponding water inlet through overflow.

Example 6

On the basis of the structure, the first sludge storage area 5 is provided with a fourth air stripper 14 for discharging sludge outwards, and the second sludge storage area 7 is provided with a fifth air stripper 15 for discharging sludge outwards; the agitator 18 is a perforated aerator pipe. The holes of the perforated aeration pipe are big holes, so that the aeration is uniform and intermittent, and the anoxic zone 2 can be ensured to be always in an anoxic state. And a small amount of air is introduced into the second sludge storage area 7, so that the adsorption performance of sludge can be improved, and the quality of the effluent is ensured to be continuously, stably and discharge after reaching the standard.

Example 7

On the basis of the structure, the second sludge storage area 7, the coagulating sedimentation area 6, the anoxic area 2, the aerobic area 3, the biochemical sedimentation area 4 and the first sludge storage area 5 are both positioned on the same side wall of the pre-anoxic area 1 and are sequentially arranged along the horizontal direction of the side wall. At the moment, the structure is compact, the miniaturization of the integrated sewage treatment reaction equipment is ensured, and the process flow of sewage treatment is greatly shortened. This structure combines the sled dress formula design of enamel makeup jar to be under construction, alright in order to shorten construction cycle greatly, and the small investment.

Example 8

On the basis of the structure, the aerobic zone 3 is provided with a first protruding extension part 31, and the first protruding extension part 31 is positioned between the pre-anoxic zone 1 and the biochemical precipitation zone 4; the water inlet of the first gas lift 11 is positioned on the first protruding extension part 31, and the water outlet thereof is positioned on the pre-anoxic zone 1; so that one part of the mixed liquid at the reaction end of the aerobic zone 3 flows back to the pre-anoxic zone 1 through the first stripper 11, and the other part overflows to the biochemical precipitation zone 4. The first sludge storage area 5 is provided with a second protruding extension part 51, and the biochemical precipitation area 4 is positioned above the second protruding extension part 51, so that sludge settled in the biochemical precipitation area 4 can conveniently enter the first sludge storage area 5; the second sludge storage area 7 is provided with a third protruding extension part 71, the coagulating sedimentation area 6 is positioned above the third protruding extension part 71, and sludge settled in the coagulating sedimentation area 6 can conveniently enter the second sludge storage area 7.

Example 9

On the basis of the structure, the biochemical precipitation area 4 and the bottom of the coagulating sedimentation area 6 are both provided with a precipitation device 16, the bottom of the precipitation device 16 is bucket-shaped, so that the sludge can slide under the action of gravity, the blockage can be avoided, and the maintenance can be facilitated. The precipitation device 16 is an inclined tube precipitation device.

Example 10

The outline of the short-flow agricultural sewage integrated treatment reaction equipment is cylindrical; a fourth protruding extension part 32 is further arranged on one side of the aerobic zone 3, which is far away from the pre-anoxic zone 1, so that the purpose of fully utilizing the space of reaction equipment is achieved; the communication position between the aerobic zone 3 and the anoxic zone 2 is located at the fourth protrusion extension part 32, and at this time, the mixed liquid at the first protrusion extension part 31 is the mixed liquid at the reaction end of the aerobic zone 3, that is, the mixed liquid flowing back to the pre-anoxic zone 1 and overflowing to the biochemical precipitation zone 4 is the mixed liquid at the reaction end of the aerobic zone 3. First store up mud district 5 the second stores up mud district 7 and all is located fourth protrusion extension 32 with between the anoxic zone 1 in advance, just first store up mud district 5 the second stores up mud district 7 and all laminates reaction equipment's lateral wall, makes things convenient for the emission of mud.

The first stripper 11, the second stripper 12, the third stripper 13, the fourth stripper 14 and the fifth stripper 15 all use air as a power source, so that the maintenance is facilitated, and the management is simplified. Due to the adoption of the first stripper 11, the second stripper 12 and the third stripper 13, the internal circulation of sewage and sludge is realized, and the problem of difficult treatment of seasonal and day-night water quality and quantity changes can be effectively solved.

Because each functional unit highly combines, the throughput is big, but the equipment miniaturization, and the outline is cylindrical, does not receive limit for height width influence when the transportation.

In conclusion, the short-flow agricultural sewage integrated treatment reaction equipment provided by the invention integrates three functional units, namely biochemical reaction, chemical phosphorus removal and SS removal, into one reaction equipment, so that the problem of difficult treatment of seasonal and day-night water quality and water quantity change is effectively solved; the method simplifies daily operation management, improves the system treatment capacity and treatment efficiency, and reduces investment, thereby being particularly suitable for the current domestic integrated sewage treatment and having good popularization and application prospects.

The first … … and the second … … are only used for name differentiation and do not represent how different the importance and position of the two are.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A short-flow agricultural sewage integrated sewage treatment reaction device is characterized by comprising a pre-anoxic zone, an aerobic zone, a biochemical precipitation zone and a first sludge storage zone which are sequentially communicated; the sludge treatment device also comprises a coagulating sedimentation area and a second sludge storage area which are sequentially communicated, and the biochemical sedimentation area is also connected with the coagulating sedimentation area; the system also comprises a first stripper used for driving the mixed liquor to flow from the aerobic zone to the pre-anoxic zone and a second stripper used for driving the sludge in the first sludge storage zone to flow back to the pre-anoxic zone.

2. The short-flow integrated sewage treatment and treatment plant of agricultural sewage as claimed in claim 1, further comprising a biochemical water outlet pipe and a third stripper for driving the sludge in the second sludge storage zone to flow back to the coagulating sedimentation zone; the pre-anoxic zone, the anoxic zone and the aerobic zone are adjacent in pairs; the bottom of the biochemical precipitation area is communicated with the first sludge storage area, and the upper part of the biochemical precipitation area is connected with the coagulating precipitation area through the biochemical water outlet pipe; and the bottom of the coagulating sedimentation area is communicated with the second sludge storage area.

3. The short-flow integrated sewage treatment and treatment plant of agricultural sewage as claimed in claim 2, wherein the bottom of the aerobic zone and the bottom of the first sludge storage zone are provided with an oxygenation aeration pipe; and stirrers are arranged at the bottoms of the pre-anoxic zone, the anoxic zone and the second sludge storage zone.

4. The short-flow integrated sewage treatment and treatment plant according to claim 3, further comprising a dosing device, wherein the coagulation and precipitation zone is provided with a fast mixing grid, and the outlet of the biochemical water outlet pipe, the outlet of the dosing device and the outlet of the third stripper are all located in the fast mixing grid.

5. The short-flow integrated sewage treatment and treatment plant according to claim 4, further comprising a water inlet pipe and a water outlet pipe; the water outlet of the water inlet pipe is positioned in the pre-anoxic zone and/or the anoxic zone; and the water inlet of the water outlet pipe is positioned in the coagulating sedimentation area.

6. The short-flow integrated sewage treatment and reaction device for agricultural sewage treatment of claim 5, wherein the first sludge storage area is provided with a fourth stripper for discharging sludge outwards, and the second sludge storage area is provided with a fifth stripper for discharging sludge outwards; the stirrer is a perforated aeration pipe.

7. The short-flow integrated sewage treatment and treatment plant according to any one of claims 1 to 6, wherein the second sludge storage zone, the coagulation and precipitation zone, the anoxic zone, the aerobic zone, the biochemical precipitation zone and the first sludge storage zone are all located on the same side wall of the pre-anoxic zone and are arranged in sequence along the horizontal direction of the side wall.

8. The short-flow integrated sewage treatment and treatment plant according to claim 7, wherein the aerobic zone is provided with a first protruding extension part, and the first protruding extension part is located between the pre-anoxic zone and the biochemical precipitation zone; the water inlet of the first gas lift is positioned on the first protrusion extension part, and the water outlet of the first gas lift is positioned on the pre-anoxic zone; the first sludge storage area is provided with a second protruding extension part, and the biochemical precipitation area is positioned above the second protruding extension part; the second mud storage area is provided with a third protruding extension part, and the coagulating sedimentation area is located above the third protruding extension part.

9. The short-flow integrated sewage treatment and treatment plant according to claim 8, wherein the bottom of each of the biochemical precipitation zone and the coagulating sedimentation zone is provided with a sedimentation device, and the bottom of the sedimentation device is bucket-shaped.

10. The short-flow integrated sewage treatment plant according to claim 8 or 9, wherein the outer profile is cylindrical; the aerobic zone is far away from one side of the pre-anoxic zone is further provided with a fourth protrusion extension part, and the aerobic zone and the communication position between the anoxic zones are located at the fourth protrusion extension part.