CN107973490B

CN107973490B - Pneumatic stirring mixes automatic domestic sewage purification unit that flows back of mud

Info

Publication number: CN107973490B
Application number: CN201711372645.8A
Authority: CN
Inventors: 杨晓进; 尹利君; 佟艳明; 候瑷瑛
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing zhonglihong Environmental Technology Co.,Ltd.
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2020-09-22
Anticipated expiration: 2037-12-19
Also published as: CN107973490A

Abstract

The invention relates to a pneumatic mixed sludge automatic backflow domestic sewage purification treatment device, which comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is a water inlet tank, the space between the inner cylinder and the outer cylinder is sequentially divided into an anaerobic tank, an anoxic tank, an aerobic tank, a precipitation tank, a dosing tank and a clear water tank by a partition plate, sewage to be treated enters the water inlet tank from the top end, the lower end of the water inlet tank is provided with a water inlet communicated with the anaerobic tank, the water inlet is arranged at one end far away from the anoxic tank, the anaerobic tank, the anoxic tank, the aerobic tank and the precipitation tank are sequentially communicated with the clear water tank by broken lines in the following up-down sequence, the top of the clear water tank is connected with a water outlet pipeline, the top of the anaerobic tank is sealed and is connected with an air blowing port, and. The invention adopts the air pump to blow air into the anaerobic tank to lower the water level in the anaerobic tank, realizes the stirring and mixing of anaerobic and anoxic zones and the backflow of anoxic sludge to the anaerobic zone by releasing energy through the U-shaped pipe, improves the denitrification effect of the small sewage purification tank, accelerates the purification and treatment speed of sewage, and has simple operation and maintenance and convenient application and popularization due to unpowered stirring facilities in the device.

Description

Pneumatic stirring mixes automatic domestic sewage purification unit that flows back of mud

Technical Field

The invention relates to a sewage treatment facility, in particular to a dispersed domestic sewage purification treatment device.

Background

In the process of decentralized sewage treatment in rural areas or partial towns, a treatment facility which has a simple structure and low energy consumption and can simultaneously and efficiently remove organic pollutants, nitrogen and phosphorus is lacked. Most of the existing small-sized sewage purification tanks adopt an aeration mode to remove organic pollutants and ammonia nitrogen in the sewage by degrading organic matters in the sewage through an aerobic microbial process. However, in the anaerobic or anoxic region of the small-sized sewage purification tank, since no mechanical stirring and sludge return equipment exists, a large flow dead zone exists, anaerobic microorganisms are difficult to effectively exert effects, the ammonia nitrogen and total nitrogen removal effect is poor, and the small-sized sewage purification tank is especially suitable for rural household sewage.

Disclosure of Invention

In order to solve the technical problem that effective mixing and contact of microorganisms and pollutants are realized in the conventional sewage purification tank without installing a mechanical stirring facility, the invention provides a sewage purification treatment device which achieves mixing and stirring and sludge backflow in an anaerobic and anoxic region in a pneumatic mode and has no flowing dead angle, thereby improving the purification treatment capacity per unit volume.

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

a pneumatic stirring mixed sludge automatic backflow domestic sewage purification treatment device is characterized by comprising an inner cylinder and an outer cylinder, wherein a water inlet tank is arranged in the inner cylinder, a space between the inner cylinder and the outer cylinder is sequentially divided into an anaerobic tank, an anoxic tank, an aerobic tank, a precipitation tank, a chemical feeding tank and a clear water tank by a partition plate, sewage enters the water inlet tank from a water inlet pipe at the top of the water inlet tank, the lower end of the water inlet tank is provided with a water inlet communicated with the anaerobic tank, the anoxic tank, the aerobic tank, the precipitation tank, the chemical feeding tank and the clear water tank are sequentially communicated according to the sequence of communicating lower parts, communicating upper parts and communicating lower parts, so that the sewage sequentially passes through six treatment areas in an up; the anaerobic tank top is sealed and a gas blowing port is reserved, a U-shaped pipe for automatically stirring sewage and sludge is arranged on the side wall of the inner cylinder between the water inlet tank and the anaerobic tank, vertical pipes on two sides of the U-shaped pipe are respectively positioned in the water inlet tank and the anaerobic tank, and a water outlet pipe is arranged at the top of the clear water tank.

The inner cylinder and the outer cylinder are both circular cylinders.

The bottom of the anaerobic tank is communicated with the bottom of the anoxic tank through a channel at the lower part of the partition plate, and a blocking partition plate is arranged in the anaerobic tank at a position corresponding to the channel.

The water inlet at the lower end of the water inlet groove is not smaller than the sectional area of the water inlet pipe and is positioned on one side far away from the communication port between the anaerobic groove and the anoxic groove.

The air blowing port is positioned on the top cover of the anaerobic tank, is an air quick connector and is used for connecting an external air pump to blow air, and the stirring frequency is adjusted according to the air quantity of the air pump.

The distance from the bottom end of the U-shaped pipe to the bottom of the anaerobic tank is 1/4 the height of the whole purification tank, the height of the U-shaped pipe is 1/3-1/2 the height of the whole purification tank, the width of the U-shaped pipe is not more than the width of the anaerobic tank, and the inner diameter of the U-shaped pipe is not more than 0.05 m.

The blocking partition plate is positioned between the U-shaped pipe in the anaerobic tank and the partition plate between the anaerobic tank and the anoxic tank, the ratio of the distance from the U-shaped pipe to the distance from the partition plate is 4:6 to 6:4, and the height of the blocking partition plate is flush with the bottom of the U-shaped pipe.

The upper part of the side wall of the inner cylinder is provided with an overrunning port which is higher than the bottom of the water inlet pipe, the overrunning port and the water inlet pipe are positioned on the same diameter of the inner cylinder, and the diameter of the overrunning port is not smaller than that of the water inlet pipe.

The medicine feeding groove is positioned between the settling groove and the clear water groove, and the volume of the medicine feeding groove is 1/4-1/5 of the settling groove.

The water outlet pipe is positioned at the upper end of the clear water tank, is vertically lower than the water inlet pipe by 3-5cm, is positioned on the same straight line with the water inlet pipe, and is communicated with the water inlet pipe in pipe diameter.

The invention has the technical effects that: when the intake chamber intakes, the air is blown into to the anaerobism groove, make the water level decline in anaerobism groove, intake chamber and oxygen deficiency groove water level rise, when anaerobism groove water level decline U type socle portion, the anaerobism inslot air passes through U type pipe quick release, the water in intake chamber and oxygen deficiency groove returns the anaerobism groove rapidly from lower part intercommunication department, thereby reach the intake chamber, the effective mixture in anaerobism groove and oxygen deficiency groove and the backward flow of oxygen deficiency inslot mud, the stirring of mud and sewage is mixed has been realized, the denitrification has been promoted, can improve the frequency that the stirring is mixed through the flow that increases the drum gas, thereby eliminate the intake chamber, the blind spot in anaerobism groove and the oxygen deficiency inslot. Because no mechanical stirring equipment is arranged, the device is simple to operate and maintain, the equipment and operation and maintenance cost is saved, the structure is simplified, and the popularization is convenient.

Drawings

The invention is further described below with reference to the accompanying drawings:

FIG. 1 is a plan view of a sewage treatment purifying apparatus according to an embodiment 1 of the present invention;

FIG. 2 is a partial sectional view of a sewage treatment purifying apparatus according to an embodiment 1 of the present invention;

FIG. 3 is a partial sectional view of another angle of the sewage treatment purifying apparatus according to the embodiment 1 of the present invention.

Wherein: the device comprises an outer wall 1, a water inlet pipe 2, a water distributor 3, a U-shaped pipe 4, an inner barrel 5, a first clapboard 6, a second clapboard 7, a third clapboard 8, a fourth clapboard 9, a fifth clapboard 10, a sixth clapboard 11, an anaerobic tank top cover 12, an air blowing port 13, a water outlet pipe 14, a water inlet 15, a blocking clapboard 16, an overrunning port 17, a water inlet tank 18, an anaerobic tank 19, an anoxic tank 20, an aerobic tank 21, a sedimentation tank 22, a chemical adding tank 23 and a clear water tank 24.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention.

Example 1

A pneumatic mixed sludge automatic backflow domestic sewage purification treatment device adopts a cylindrical barrel type structure device, as shown in figure 1, the device comprises a cylindrical outer wall 1, an inner barrel 5 is arranged in the center of the inner part of the outer wall 1, six clapboards are arranged in an annular groove between the inner barrel 5 and the outer wall 1 and respectively comprise a first clapboard 6, a second clapboard 7, a third clapboard 8, a fourth clapboard 9, a fifth clapboard 10 and a sixth clapboard 11, the six clapboards divide the annular groove into an anaerobic groove 19, an anoxic groove 20, an aerobic groove 21, a sedimentation groove 22, a drug feeding groove 23 and a clear water groove 24 in sequence, the inner part of the inner barrel 5 is a water inlet groove 18, the lower end of the water inlet groove 18 is provided with a water inlet 15 communicated with the anaerobic groove 19, the water inlet 15 is arranged at one end far away from the anoxic groove 20, the anaerobic groove 19 is separated from the anoxic groove 20 by the second clapboard 7, the bottom of the second clapboard 7 is provided with a channel, a blocking partition plate 16 is arranged in the anaerobic tank 19 corresponding to the channel at the bottom of the second partition plate 7, the anoxic tank 20 is communicated with the aerobic tank 21 through the channel at the upper part of the third partition plate 8, the aerobic tank 21 is communicated with the precipitation tank 22 through the channel at the lower part of the fourth partition plate 9, the precipitation tank 22 is communicated with the chemical feeding tank 23 through the channel at the upper part of the fifth partition plate 10, the chemical feeding tank 23 is communicated with the clear water tank 24 through the channel at the bottom of the sixth partition plate 11, and the top of the clear water tank 24 is provided with a water outlet pipe 14.

The side wall of the inner cylinder 5 between the water inlet tank 18 and the anaerobic tank 19 is provided with a U-shaped pipe 4 for automatically stirring sewage and sludge, and the vertical pipes on two sides of the U-shaped pipe are respectively positioned in the water inlet tank 18 and the anaerobic tank 19. The distance from the bottom end of the U-shaped pipe 4 to the bottom of the anaerobic tank 19 is 1/4 of the height of the whole purification tank, the height of the U-shaped pipe 4 is 1/3-1/2 of the height of the whole purification tank, and the width of the U-shaped pipe 4 does not exceed the width of the anaerobic tank 19. The inner diameter of the U-shaped tube 4 is not more than 0.05 m.

The top of the anaerobic tank 19 is sealed and a blast opening 13 is reserved. The air blowing port 13 is positioned on the top cover 12 of the anaerobic tank, is an air quick connector and is used for connecting an external air pump to blow air, and the stirring frequency can be adjusted according to the air quantity of the air pump.

The top lateral wall of intake antrum 18 is provided with and surpasss mouthful 17, is provided with inlet tube 2 on the inner wall of intake antrum 18, and inlet tube 2 stretches into the inside of intake antrum, surpasss mouthful 17 and is higher than inlet tube 2 bottom and be in the same diameter of inner tube 5 with inlet tube 2 on, and surpasss the diameter of mouthful 17 and be not less than the diameter of inlet tube 2.

The lower end of the water inlet pipe 2 is provided with a water distributor 3, the water distributor 3 is parallel to the bottom plate of the water inlet tank, is 100mm away from the top and is lower than the overrunning port 17, and the water distributor 3 is arranged at one end far away from the water inlet 15.

The barrier 16 is positioned between the U-shaped pipe 4 and the second partition 7 inside the anaerobic tank 19. The ratio of the distance from the U-shaped pipe 4 to the distance from the second partition 7 is 4:6 to 6: 4. The top of the barrier 16 is flush with the bottom of the U-tube 4.

The volume of the medicine adding tank is 1/4-1/5 of the precipitation tank 22.

The water outlet pipe 14 is vertically lower than the bottom end of the water inlet pipe by 3-5cm, is positioned on the same straight line with the water inlet pipe 2, and has the same pipe diameter as the water inlet pipe 2.

The specific working flow of the purification tank is as follows:

the outer wall 1 wraps the whole purifying tank and is communicated with the outside through the water inlet pipe 2, the water outlet pipe 14 and the air blowing port 13. The sewage enters the water distributor 3 through the water inlet pipe 2 and then is uniformly distributed on one side of the water inlet tank 18, and the sewage flows through the whole water inlet tank and then enters the anaerobic tank 19 through the water inlet 15, so that the formation of a dead zone in the water inlet tank 18 is avoided. Gas is blown in from the gas blowing port 13 above the anaerobic tank 19, because the upper part of the anaerobic tank 19 is closed, the blown gas is gathered at the top of the anaerobic tank 19, the liquid level of the anaerobic tank 19 is promoted to drop, when the water level drops to the bottom of the U-shaped pipe 4, the gas is rapidly discharged from the U-shaped pipe, muddy water in the water inlet tank and the anoxic tank rapidly flows back to the anaerobic tank from the bottom, and the water inlet tank, the anaerobic tank and the anoxic tank are stirred and mixed, namely a stirring and mixing period is formed. After the stirring, the U-shaped pipe 4 is filled with the stirred anaerobic tank sludge, in the next stirring process, the anaerobic tank sludge in the U-shaped pipe 4 enters the water inlet tank 18, the sludge is circulated, the circulation of the sludge is favorable for fully contacting with the sewage, and the anaerobic reaction is realized.

The gas stored in the anaerobic tank 19 is released into the water inlet tank 18 through the U-shaped pipe 4, and the sewage is flushed into the anaerobic tank from the lower end of the water inlet tank 18. The sewage cannot directly flow into the anoxic tank 20 by the blocking action of the blocking partition 16, which results in the sewage flowing through the entire anaerobic tank 19, avoiding the formation of a dead zone in the anaerobic tank 19.

The sewage flows through the partition board between the outer wall 1 and the inner cylinder 5, stably moves forward in a baffling mode, sequentially passes through the anoxic tank 20, the aerobic tank 21, the sedimentation tank 22, the dosing tank 23 and the clear water tank 24, and finally is discharged out of the treatment device at the water outlet pipe 14.

Select suitable air pump to have important influence to the frequency that the stirring was mixed, under the surplus condition of mud output, can adopt the mode of external mud pipe and dredge pump to arrange mud, select suitable medicament to add the medicine in the medicine groove according to the quality of water that intakes, guarantee the quality of water of play water, suitable filler is put into according to the quality of water condition to two precipitation tank insides, holds back suspended solid and mud in the sewage. The cost is saved for the purifying tank without mechanical stirring equipment; due to the structural design, the purifying tank realizes the dead-angle-free flow of sewage and ensures the retention time of the sewage. The device has the advantages of energy conservation, high efficiency and high impact load resistance on dispersed domestic sewage, ensures the stable operation of the purification tank and is convenient to popularize.

The foregoing detailed description has described the basic principles and principal features of the invention. It will be appreciated by those skilled in the art that the scope of the present invention is not limited to the embodiments described above, and any changes or substitutions which are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A pneumatic stirring mixed sludge automatic backflow domestic sewage purification treatment device is characterized by comprising an inner cylinder and an outer cylinder, wherein a water inlet tank is arranged in the inner cylinder, a space between the inner cylinder and the outer cylinder is sequentially divided into an anaerobic tank, an anoxic tank, an aerobic tank, a precipitation tank, a chemical feeding tank and a clear water tank by a partition plate, sewage enters the water inlet tank from a water inlet pipe at the top of the water inlet tank, the lower end of the water inlet tank is provided with a water inlet communicated with the anaerobic tank, the anoxic tank, the aerobic tank, the precipitation tank, the chemical feeding tank and the clear water tank are sequentially communicated according to the sequence of communicating lower parts, communicating upper parts and communicating lower parts, so that the sewage sequentially passes through six treatment areas in an up; the top of the anaerobic tank is sealed and provided with an air blowing port, a U-shaped pipe for automatically stirring sewage and sludge is arranged on the side wall of the inner cylinder between the water inlet tank and the anaerobic tank, vertical pipes on two sides of the U-shaped pipe are respectively positioned in the water inlet tank and the anaerobic tank, and a water outlet pipe is arranged at the top of the clear water tank; the anaerobic tank is communicated with the bottom of the anoxic tank through a channel at the lower part of the partition plate, a blocking partition plate is arranged in the anaerobic tank at a position corresponding to the channel, the blocking partition plate is positioned between the U-shaped pipe in the anaerobic tank and the partition plate between the anaerobic tank and the anoxic tank, the ratio of the distance from the U-shaped pipe to the distance from the partition plate is 4:6 to 6:4, and the height of the blocking partition plate is flush with the bottom of the U-shaped pipe.

2. The apparatus for purifying domestic sewage by automatically refluxing sludge with pneumatic stirring as claimed in claim 1, wherein the inner cylinder and the outer cylinder are both circular cylinders.

3. The apparatus for purifying and treating domestic sewage by automatically refluxing sludge with pneumatic agitation as claimed in claim 1, wherein the water inlet at the lower end of the water inlet tank is not smaller than the sectional area of the water inlet pipe and is located at a side away from the communication port between the anaerobic tank and the anoxic tank.

4. The apparatus according to claim 1, wherein the air blowing port is located on the top cover of the anaerobic tank, and the air blowing port is a quick air connector for connecting an external air pump to blow air, and the stirring frequency is adjusted according to the air flow of the air pump.

5. The apparatus for treating domestic sewage by automatically returning sludge through pneumatic stirring as claimed in claim 1, wherein the distance from the bottom end of the U-shaped pipe to the bottom of the anaerobic tank is 1/4, the height of the U-shaped pipe is 1/3-1/2, the width of the U-shaped pipe is not more than the width of the anaerobic tank, and the inner diameter of the U-shaped pipe is not more than 0.05 m.

6. The apparatus according to claim 1, wherein the upper portion of the sidewall of the inner cylinder is provided with an overrun opening, the overrun opening is higher than the bottom of the water inlet pipe, the overrun opening and the water inlet pipe are positioned on the same diameter of the inner cylinder, and the diameter of the overrun opening is not smaller than the diameter of the water inlet pipe.

7. The apparatus for purifying and treating domestic sewage by automatically returning sludge through pneumatic stirring and mixing as claimed in claim 1, wherein the chemical feeding tank is located between the settling tank and the clear water tank, and has a volume of 1/4-1/5 of the settling tank.

8. The apparatus for purifying and treating domestic sewage by automatically returning sludge through pneumatic stirring and mixing as claimed in claim 1, wherein the outlet pipe is located at the upper end of the clear water tank, vertically lower than the inlet pipe by 3-5cm, and is in the same line with the inlet pipe, and the pipe diameter is communicated with the inlet pipe.