CN114671574A

CN114671574A - Sewage treatment device

Info

Publication number: CN114671574A
Application number: CN202210415722.8A
Authority: CN
Inventors: 陈恒飞; 杨玉; 祁俊; 杨兴华
Original assignee: Anhui Asia Pacific Environmental Engineering Tech Co ltd
Current assignee: Anhui Asia Pacific Environmental Engineering Tech Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-06-28

Abstract

The invention discloses a sewage treatment device which is characterized by comprising a water inlet mixing zone, wherein the water inlet mixing zone is connected with an anaerobic zone, an anoxic zone, a buffer zone, a gas stripping zone, an aeration zone, a nitrifying liquid reflux zone and a settling zone which are sequentially communicated, and the settling zone is communicated with the water inlet mixing zone; be equipped with aeration equipment in the aeration zone, be equipped with the air in the liquid backward flow district of nitrifying and push away a class device, the air pushes away a class device and includes parallel arrangement's partition wall, both sides be equipped with air diffuser between the partition wall, this application is through setting up aeration equipment, has increased oxygen transmission efficiency, still is equipped with the air simultaneously and pushes away a class device, makes the pollutant concentration of intaking reduce rapidly, causes the pollutant concentration difference in whole pond to reduce by a wide margin, has just so avoided the microorganism to suffer the impact effectively, provides stable water environment for the microorganism grows. The concentration gradient is reduced, and the impact of the concentration load of the inlet water is reduced.

Description

Sewage treatment device

Technical Field

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

Background

At present, the biochemical process of domestic sewage plants mainly adopts an AAO anaerobic-anoxic-aerobic process, the process is mature and reliable, three different environmental conditions of anaerobic, anoxic and aerobic and different types of microbial strains are matched with each other, organic matters can be stably removed, the synchronous denitrification and dephosphorization effects are good, filamentous bacteria cannot be massively proliferated, the sludge bulking problem is avoided, and the SVI is generally less than 100.

However, the traditional aerator has low oxygenation efficiency, needs to be overhauled and stopped production, has large energy consumption of a fan, the reflux ratio of the nitrifying liquid is 200-400 percent, the energy consumption of a reflux pump is large, the dissolved oxygen of the nitrifying liquid flowing back to an anoxic section is high, the consumption of a carbon source consumed by denitrification is large, and the load resistance and the impact resistance are poor.

Disclosure of Invention

The present invention is directed to a sewage treatment apparatus to solve the above problems.

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

a sewage treatment device comprises a water inlet mixing zone 1, wherein the water inlet mixing zone 1 is connected with an anaerobic zone 2, an anoxic zone 3, a buffer zone 4, a gas stripping zone 5, an aeration zone 6, a nitrified liquid reflux zone 7 and a settling zone 8 which are sequentially communicated, and the settling zone 8 is communicated with the water inlet mixing zone 1;

an aeration device is arranged in the aeration zone 6, an air plug flow device is arranged in the nitrifying liquid reflux zone 7, the air plug flow device comprises partition walls 9 which are arranged in parallel, and air diffusers 10 are arranged between the partition walls 9 on two sides.

As a further scheme of the invention: the aeration device is of a liftable structure.

As a further scheme of the invention: the aeration device comprises an aeration branch pipe 11 and an aeration hose 13 communicated with the aeration branch pipe 11, wherein the aeration hose 13 is connected with the bottom plate of the aeration area 6 in a sliding way.

As a further scheme of the invention: the bottom of the aeration zone 6 is provided with a plurality of hose guide grooves 14, two ends of the bottom of the aeration zone 6 are provided with pulleys 15, and the aeration hose 13 penetrates through the hose guide grooves 14 and the pulleys 15.

As a further scheme of the invention: and a branch pipe guide rail 12 is arranged in the aeration area 6, the aeration branch pipe 11 is in sliding connection with the aeration area 6 through the branch pipe guide rail 12, and the aeration branch pipe 11 is of a hose structure.

As a further scheme of the invention: the aeration hose 13 is provided with air holes, the density of the air holes is 3300 per meter, the ventilation volume is 0.5-1, and the oxygen utilization rate is 35%.

As a further scheme of the invention: a clarifying device is arranged in the settling zone 8.

As a further scheme of the invention: the clarification device is including setting up in at least a clarification swash plate 17 in the clarification district 8, be equipped with baffle 19 in the clarification district 8, clarification swash plate 17 is located baffle 19 is inboard, clarification swash plate 17 top is equipped with out basin 18.

As a further scheme of the invention: the water inlet mixing zone 1, the anaerobic zone 2, the anoxic zone 3, the buffer zone 4, the gas stripping zone 5, the aeration zone 6, the nitrifying liquid reflux zone 7 and the settling zone 8 are arranged in the same treatment tank.

As a further scheme of the invention: the water inlet mixing area 1 is connected with a deodorization device, the deodorization device comprises a plurality of tank bodies for placing deodorization bacteria, a plurality of release holes are formed in the tank bodies, and the deodorization microorganism adding portion is communicated with the water inlet mixing area.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the method, a special aeration mode and a hole distribution technology are arranged, so that aeration is more uniform, on the premise of reducing the ventilation capacity by 90%, the probability that bubbles collide with each other to form larger bubbles in the rising process is remarkably reduced, the diameter of the bubbles reaching the top of the pool is greatly reduced, the rising speed is reduced by several times, the specific surface area of the generated bubbles is large, the oxygen transfer efficiency is improved by several times, sufficient micro-mixing with a water body and a flora group is formed after the rising speed of the bubbles is reduced, and the efficiency of obtaining oxygen by microorganisms is improved by several times; meanwhile, the special installation, operation and maintenance modes of the aeration system ensure the maintenance-free operation of the aeration system and the simple and convenient non-stop replacement operation;

2. the muddy water mixture that utilizes air impeller in with the cell body that this application adopted circulates, circulation flow is tens times or even thousand times of inflow, because the pollutant in the water is along with rivers circulation, has been degraded by the microorganism gradually, thereby pollutant concentration is lower at the circulation end, low concentration circulating water flow can carry out the big ratio doubly dilution to intaking, make the pollutant concentration of intaking reduce rapidly, cause the pollutant concentration difference in whole pond to reduce by a wide margin, just so avoided the microorganism to suffer the impact effectively, provide stable water environment for the microbial growth. The concentration gradient is reduced, and the impact of the concentration load of the inlet water is reduced;

3. by adopting the embedded deodorization technology, the deodorization microorganisms enter each process section along with the sewage treatment process, so that the malodorous substances of each structure are removed in water, and the overall process control of the malodorous substances of the sewage plant is realized. Compared with the traditional deodorization process, the technology has the following advantages: a cover is not required to be added, and the links of odor collection and delivery in the traditional process are omitted; no new facilities are required, and the occupied area is saved; eliminating malodorous substances from the source, and reducing the corrosion of hydrogen sulfide and the like in the odor to equipment; the construction mode is convenient and quick, and particularly, the construction can be carried out without stopping production in old factory reconstruction; the composite microbial filler is not a slow-release filler, so that the loss is less, the durability is strong, and the carrier/catalytic filler is a permanent filler; the investment and operation cost is low; the operation is stable, the maintenance is simple and convenient, and the safety is strong.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a flow chart of the process of the present embodiment;

FIG. 3 is a schematic view of an air-pushing device according to the present embodiment;

FIG. 4 is a schematic structural view of an aeration apparatus according to the present embodiment;

FIG. 5 is a schematic view of a partial structure of an aeration apparatus according to the present embodiment;

FIG. 6 is a schematic view of the clarification device according to this embodiment;

in the figure: 1-a water inlet mixing zone, 2-an anaerobic zone, 3-an anoxic zone, 4-a buffer zone, 5-a gas stripping zone, 6-an aeration zone, 7-a nitrifying liquid reflux zone, 8-a settling zone, 9-a partition wall, 10-an air diffuser, 11-an aeration branch pipe, 12-a branch pipe guide rail, 13-an aeration hose, 14-a hose guide groove, 15-a pulley, 16-an aeration hose pull rope, 17-a clarifying inclined plate, 18-a water outlet groove and 19-a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, in an embodiment of the present invention, a sewage treatment apparatus includes a water inlet mixing zone 1, an anaerobic zone 2, an anoxic zone 3, a buffer zone 4, a gas stripping zone 5, an aeration zone 6, a nitrifying liquid reflux zone 7, and a precipitation zone 8, which are sequentially arranged; a plurality of treatment units such as aerobic treatment units, anoxic treatment units, gas stripping treatment units, precipitation treatment units and the like are arranged in the same treatment tank, so that the process flow is greatly simplified, the occupied area is saved, the pipeline investment is reduced, and meanwhile, the operation and management are convenient and the control is simple. The water inlet mixing zone 1 is connected with the settling zone 8 and the anaerobic zone 2, the anaerobic zone 2 is followed by the anoxic zone 3, the buffer zone 4 is followed by the anoxic zone 3, the air stripping zone 5 is followed by the buffer zone 4, the aeration zone 6 is followed by the air stripping zone 5, the aeration device is arranged in the aeration zone 6, the nitrified liquid reflux zone 7 is followed by the aeration zone 6, the air plug flow device 10 is arranged in the nitrified liquid reflux zone 7, the settling zone 8 is followed by the nitrified liquid reflux zone 7, and the rapid clarification system is arranged in the settling zone 8.

In this embodiment, the aeration zone 6 is provided with an aeration device, the aeration device comprises an aeration branch pipe 11 and an aeration hose 13 communicated with the aeration branch pipe 11, the aeration hose 13 is slidably connected with the bottom plate of the aeration zone 6, the bottom of the aeration zone 6 is provided with a plurality of hose guide grooves 14, two ends of the bottom of the aeration zone 6 are respectively provided with a pulley 15, the aeration hose 13 passes through the hose guide grooves 14 and the pulleys 15, a branch pipe guide rail 12 is arranged in the aeration zone 6, the aeration branch pipe 11 is slidably connected with the aeration zone 6 through the branch pipe guide rail 12, the aeration branch pipe 11 is of a hose structure, the aeration hose 13 is provided with air holes, the density of the air holes is 3300 per meter, the air flow is 0.5 to 1, the oxygen utilization rate is 35%, the density of the air holes of the existing aeration pipe is 1800 to 1900 per meter, the oxygen utilization rate is 10% to 16%, the aeration mode of this embodiment greatly improves the oxygen utilization rate, makes the aeration more uniform, the aeration device adopts a lifting technology, the aeration hose one end of this embodiment is connected with the aeration hose stay cord, the aeration branch pipe is connected to the other end, the aeration branch pipe can reciprocate through the guide rail, be provided with quick-operation joint between aeration branch pipe and the aeration main pipe, when the aeration hose need be overhauld, through opening quick-operation joint, mention the aeration branch pipe, aeration hose and aeration hose stay cord slide towards promotion one side along the pulley, slowly take out the cell body with aeration branch pipe and aeration hose through the branch pipe guide rail, thereby obtain the maintenance of not stopping production.

The air flow pushing device consists of two partition walls and an air diffuser, and air is used as a lifting motive power to generate a larger water flow pushing force by using smaller energy consumption so as to push the mud-water mixture in the aeration tank to flow; the clarification device comprises at least one clarification inclined plate 17 arranged in the clarification area 8, in the embodiment, three clarification inclined plates 17 are arranged, a baffle 19 is arranged in the clarification area 8, the clarification inclined plates 17 are positioned at the inner side of the baffle 19, a water outlet groove 18 is arranged above the clarification inclined plates 17, the clarification system adopts a double-layer stable sedimentation structure, the upper layer has the traditional mud-water separation function, and the clear effluent is ensured; the lower layer can keep the biomass of the aeration tank stable through the continuous circulation of sludge at the bottom of the clarification zone; the device uses an embedded deodorization process, and deodorization microorganisms enter each process section along with the sewage treatment process, so that malodorous substances of each structure are removed in water.

The mixed area 1 of intaking is connected with deodorization equipment, deodorization equipment includes a plurality of jar bodies that are used for placing the deodorization fungus, be equipped with a plurality of release holes on jar body, deodorization microorganism interpolation portion and the mixed area intercommunication of intaking, the inside deodorization fungus that produces of deodorizing device, through releasing inside the cell body, thereby make each structures stench material get rid of in aqueous, this embedded deodorizing device is a plurality of jar bodies, jar body top sets up a plurality of release holes, after gaseous letting in at jar internal, the deodorization fungus passes through the release hole and gets into inside the cell body.

When the invention is used, the wastewater is collected by a collecting pipe network and then discharged into a sewage treatment plant, the wastewater is pretreated to remove suspended matters and silt with larger specific gravity in the water, enters a biological circulation reaction tank, is rapidly and uniformly mixed with sludge-water mixed liquor (treated wastewater) which flows back by a large specific multiple in an inlet mixing zone 1, then sequentially passes through an anaerobic zone 2, an anoxic zone 3 and an aeration zone 4, and is degraded and absorbed by pollutants such as COD (chemical oxygen demand) by utilizing microorganisms, the aeration zone is segmented, the dissolved oxygen is accurately controlled by a control system according to data provided by various online instruments, the system flexibly adjusts the sizes of all process segments of a biochemical system as necessary, the dissolved oxygen is controlled at the rear end, so that the dissolved oxygen of the mixed liquor which flows back to the anoxic segment is low in value, the carbon source is ensured to be consumed by the denitrification reaction as much as possible, the progress of the denitrification reaction is ensured, and the total nitrogen is ensured to reach the standard, greatly reduces the consumption of carbon source; then sewage enters a nitrifying liquid reflux area 7, a mud-water mixture in the aeration tank is pushed to flow through an air flow pushing device, so that substances in the tank circulate at a high speed, large-specific-time circulation is realized, meanwhile, the nitrifying liquid reflux is realized by utilizing the characteristics of air flow pushing, the nitrifying liquid flows back to an anoxic area 3, then the sewage enters a settling area, after mud-water separation is carried out through a high-efficiency settling device, sludge flows back to a water inlet mixing anoxic area from the bottom of the settling area to be mixed with inlet water, and clear water is collected by a water collecting tank at the upper part and then is discharged after reaching the standard. The property of the residual sludge in the biological reaction tank is very stable, and the residual sludge flows into the sludge storage tank through gravity flow and then is pumped into a dehydration machine room for dehydration treatment.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A sewage treatment device is characterized by comprising a water inlet mixing zone 1, wherein the water inlet mixing zone 1 is connected with an anaerobic zone 2, an anoxic zone 3, a buffer zone 4, a gas stripping zone 5, an aeration zone 6, a nitrifying liquid reflux zone 7 and a settling zone 8 which are sequentially communicated, and the settling zone 8 is communicated with the water inlet mixing zone 1;

2. The wastewater treatment plant according to claim 1, wherein said aeration device is of a liftable construction.

3. The sewage treatment apparatus according to claim 1, wherein said aeration device comprises a branch aeration pipe 11 and an aeration hose 13 communicated with said branch aeration pipe 11, said aeration hose 13 being slidably connected to the bottom plate of said aeration zone 6.

4. The sewage treatment device according to claim 3, wherein a plurality of hose guide grooves 14 are formed at the bottom of the aeration zone 6, pulleys 15 are arranged at both ends of the bottom of the aeration zone 6, and the aeration hose 13 passes through the hose guide grooves 14 and the pulleys 15.

5. The sewage treatment device according to claim 3, wherein a branch guide rail 12 is provided in the aeration zone 6, the branch aerator 11 is slidably connected to the aeration zone 6 through the branch guide rail 12, and the branch aerator 11 has a hose structure.

6. The sewage treatment apparatus according to claim 3, wherein said aeration hose 13 is provided with air holes, said air holes having a density of 3300 per meter, an aeration amount of 0.5 to 1, and an oxygen utilization rate of 35%.

7. An apparatus for treating waste water according to claim 1, wherein a clarifying means is provided in the settling zone 8.

8. The sewage treatment device according to claim 7, wherein the clarification device comprises at least one inclined clarification plate 17 arranged in the clarification zone 8, a baffle 19 is arranged in the clarification zone 8, the inclined clarification plate 17 is positioned inside the baffle 19, and a water outlet groove 18 is arranged above the inclined clarification plate 17.

9. The sewage treatment device according to claim 1, wherein the influent mixing zone 1, the anaerobic zone 2, the anoxic zone 3, the buffer zone 4, the gas stripping zone 5, the aeration zone 6, the nitrified liquid reflux zone 7 and the precipitation zone 8 are arranged in the same treatment tank.

10. The sewage treatment device according to claim 1, wherein the water inlet mixing zone 1 is connected with a deodorization device, the deodorization device comprises a plurality of tank bodies for placing deodorization bacteria, a plurality of release holes are arranged on the tank bodies, and the deodorization microorganism adding part is communicated with the water inlet mixing zone.