CN214734784U

CN214734784U - Internal circulation aerobic biological fluidized bed

Info

Publication number: CN214734784U
Application number: CN202023341938.XU
Authority: CN
Inventors: 何若平; 陈喜梅; 何青; 方传宝
Original assignee: Nanjing Nine Environmental Protection Technology Co ltd
Current assignee: Nanjing Nine Environmental Protection Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-16
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to an internal circulation aerobic biological fluidized bed, which comprises a cylinder body, wherein the side wall of the cylinder body is provided with a water inlet pipe and a water outlet pipe, an internal circulation reflux device, an aeration device, a microorganism carrier, a flow guide body and an overflow weir are arranged in the cylinder body, the internal circulation reflux device is arranged in the middle of the cylinder body and consists of a square pipe and four supporting plates, through holes are arranged on the supporting plates, the through holes on the two adjacent supporting plates are staggered, and the microorganism carrier is arranged in the square pipe; the aeration device comprises an aeration disc, an air inlet pipe and a support base, the air inlet pipe is arranged at the bottom end of the barrel through the support base at the bottom end, one end of the air inlet pipe extends out of the barrel, and the aeration disc is reversely arranged at the lower end of the air inlet pipe in a 180-degree rotating manner; the guide body is arranged at the bottom of the cylinder body and formed by splicing a plurality of guide plates, and a sludge discharge pipe is arranged at the bottom of the concave part of the guide body; the overflow weir is arranged at the top of the cylinder body; the internal circulation aerobic biological fluidized bed has good sewage treatment effect, low energy consumption and high mass transfer efficiency.

Description

Internal circulation aerobic biological fluidized bed

Technical Field

The utility model relates to a sewage treatment facility, in particular to an internal circulation aerobic biological fluidized bed.

Background

With the continuous development of the times, the industrialization is effectively improved, the water pollution becomes one of the current problems which are not small, wherein the sewage can be divided into three types according to the source of the sewage, namely domestic sewage, industrial sewage and cultivation sewage, wherein the domestic sewage mainly contains non-toxic organic matters, and the required elements for the growth of plants such as saccharides, starch, protein, a large amount of nitrogen and phosphorus can influence the eutrophication of water bodies.

The biological fluidized bed is a novel biofilm method treatment process developed in the 70 th of the 20 th century, and can be divided into an anaerobic biological fluidized bed and an aerobic biological fluidized bed according to whether the inside of a reactor is aerobic or not. The aerobic biological fluidized bed is a novel biochemical sewage treatment device which organically combines the traditional movable sludge method and the biofilm method and introduces a chemical fluidization technology, and has the advantages of high treatment efficiency, large volume load, strong impact resistance, compact equipment, small occupied area and the like due to high biological solid concentration and high mass transfer efficiency, thereby becoming a hotspot of recent research.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the defects of the prior art are overcome, the internal circulation aerobic biological fluidized bed is provided, the sewage treatment effect is good, the energy consumption is small, and the mass transfer efficiency is high.

In order to solve the technical problem, the utility model provides an aerobic biological fluidized bed of inner loop mainly includes the barrel, and the barrel is closed structure, is equipped with inlet tube and the outlet pipe that runs through the barrel on the lateral wall of barrel, and the inlet tube sets up in the lower extreme of barrel one side, and the outlet pipe sets up in the upper end of barrel one side, is equipped with inner loop reflux unit, aeration equipment, microbial carrier, baffle and overflow weir in the barrel, wherein:

the internal circulation reflux device is arranged in the middle of the barrel and consists of a square pipe and four supporting plates, the four supporting plates are symmetrically arranged on two sides of the square pipe, through holes are formed in the supporting plates, the through holes in the two adjacent supporting plates are staggered, and a microorganism carrier is arranged in the square pipe;

the aeration device comprises an aeration disc, an air inlet pipe and a support base, the air inlet pipe is arranged at the bottom end of the barrel through the support base arranged at the bottom end of the air inlet pipe, one end of the air inlet pipe penetrates through the barrel and extends out of the barrel, the aeration disc is reversely arranged at the lower end of the air inlet pipe in a 180-degree rotating manner, and the aeration disc is positioned at the lower end of the square pipe;

the guide body is arranged at the bottom of the barrel body and formed by splicing a plurality of guide plates, the adjacent guide plates are symmetrically arranged, and the bottom of the guide body which is concave downwards is provided with a mud pipe;

the overflow weir is arranged at the top of the cylinder body, and the position of the overflow weir corresponds to the position of the water outlet pipe.

The utility model discloses the technical scheme who further injects is:

furthermore, in the internal circulation aerobic biological fluidized bed, a grid is arranged at the upper end of the square pipe.

The technical effect, the setting of graticule mesh can effectively be detained the microbial carrier in square tub of reaction zone, reduces the loss of microbial carrier.

In the aforementioned internal circulation aerobic biological fluidized bed, the cylinder is of a cylindrical structure, and the lower end of the cylinder is provided with a chamfer.

The technical effect is that the design of the chamfer angle is convenient for the sludge precipitated and separated to flow back to the bottom of the cylinder body along the chamfer angle, so that the flow guide of the flow guide body is convenient, and then the sludge is discharged out of the cylinder body through the sludge discharge pipe.

The utility model has the advantages that:

the utility model discloses 180 rotatory inversions of well aeration dish are at the lower extreme of intake pipe, and the surface of aeration dish is towards barrel bottom, when normal aeration is used for the fluidization, and work has avoided mud or carrier filler to block up aeration dish surface aeration hole when stopping, influences the aeration effect, reduces the mass transfer effect, influences final treatment effect.

The utility model only adopts four supporting plates, two at each side, does not influence the advance of smooth circulation of water flow, and the water passing through the upper supporting plate also needs to flow downwards one layer by one layer through the buffering of the lower supporting plate by the staggered arrangement of the through holes on the supporting plates, thereby slowing down the speed of the water flow, being beneficial to the separation of carriers and water and being beneficial to the oxygenation effect of sewage; in addition, the supporting plate is arranged in the barrel more firmly so as to enable the square pipe to be arranged in the barrel more firmly, a reaction area and a settlement area are formed in the barrel, and internal circulation is well formed.

The utility model discloses well aeration dish is located square tub of lower extreme and only is equipped with the aeration pipe at the lower extreme of the reaction zone that square tub of formation, the settling zone is not established, utilize the velocity of flow difference, the liquid in reaction zone is upwards flowed by the gaseous drive of aeration dish, the liquid of settling zone flows downwards, reach the bottom, the gaseous drive of aeration dish once more upwards flows, make the circulation that rivers can be fine get up, the contact reaction time of sewage with the bio-carrier has been prolonged, the utilization ratio of oxygen and the treatment effeciency of difficult degradation organic sewage have been improved, can satisfy high load waste water treatment's needs and energy saving and consumption reduction.

The utility model discloses in be equipped with the baffle, and the baffle is formed by the guide plate concatenation, encloses into the isosceles triangle degree between the adjacent guide plate, is convenient for collect a small amount of biological carrier and the mud that subsides after the biofilm formation more fast, and concentrates the bottom that falls into the indent of baffle and go, is convenient for collect the back and discharges through the mud pipe below, raises the efficiency.

The utility model discloses in not setting up the sediment device and mixing liquid reflux unit, lean on alternative plug flow backward flow carrier and bacterial, reduced area and investment cost to the working costs has been reduced.

The utility model discloses the carrier and the carrier is fluidization state, huge surface area is provided, specific surface area is that biological fluidized bed has high load, the root cause of high clearance, because biological fluidized bed adopts carrier microbial film and activated sludge dual-purpose, its biomass is very big, the carrier has improved the mass transfer effect of organic matter and oxygen and keeps good mixed flow state in the fluidized bed with the fluidization state who mixes mud, in case make waste water get into, just can obtain mixing very fast, dilute, thereby play the effect of buffering to the influence of load sudden change, this is that ordinary activated sludge method and biomembrane method are not up to date.

Drawings

FIG. 1 is a schematic structural view of an internal circulation aerobic biological fluidized bed according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the support plate of FIG. 1;

FIG. 3 is a schematic view of the structure of a support plate on one side of the square tube of FIG. 1;

in the figure: 1-cylinder, 2-water inlet pipe, 3-water outlet pipe, 4-microbial carrier, 5-flow guide body, 6-overflow weir, 7-square pipe, 8-support plate, 9-through hole, 11-aeration disc, 12-air inlet pipe, 13-support base, 15-sludge discharge pipe and 16-grid.

Detailed Description

Example 1

The aerobic biological fluidized bed of inner loop that this embodiment provided, the structure is shown in fig. 1-3, mainly includes barrel 1, and barrel 1 is closed structure, is equipped with inlet tube 2 and the outlet pipe 3 that runs through barrel 1 on the lateral wall of barrel 1, and inlet tube 2 sets up in the lower extreme of barrel 1 one side, and outlet pipe 3 sets up in the upper end of barrel 1 one side, is equipped with inner loop reflux unit, aeration equipment, microorganism carrier 4, baffle 5 and overflow weir 6 in the barrel 1, wherein:

the internal circulation reflux device is arranged in the middle of the barrel body 1 and consists of a square pipe 7 and four supporting plates 8, the internal circulation reflux device is welded on the inner wall of the barrel body through the supporting plates, the supporting plates are welded and sealed with the side surface of the barrel body, the whole connection is reliable, the impact of liquid mixing and stirring in the reactor on the internal circulation reflux device can be received for a long time, the service life is long, the four supporting plates 8 are symmetrically arranged on two sides of the square pipe 7, through holes 9 are formed in the supporting plates 8, the through holes 9 in the two adjacent supporting plates 8 are staggered, a microorganism carrier is arranged in the square pipe 7, and the microorganism carrier is a biological carrier formed by porous sintering of ceramic and titanium dioxide;

the aeration device comprises an aeration disc 11, an air inlet pipe 12 and a support base 13, wherein the air inlet pipe 12 is arranged at the bottom end of the cylinder 1 through the support base 13 arranged at the bottom end of the air inlet pipe 12, one end of the air inlet pipe 12 penetrates through the cylinder 1 and extends out of the cylinder 1, the aeration disc 11180 degrees rotates to be inversely installed at the lower end of the air inlet pipe 12, and the aeration disc 11 is positioned at the lower end of the square pipe 7;

the guide body 5 is arranged at the bottom of the barrel body 1, the distance between the guide body and the air inlet pipe ensures normal and effective operation, the guide body 5 is formed by splicing a plurality of guide plates, the adjacent guide plates are symmetrically arranged, and the bottom of the guide body 5 which is concave is provided with a mud pipe 15;

the overflow weir 6 is arranged at the top of the cylinder 1, and the position of the overflow weir 6 corresponds to the position of the water outlet pipe 3.

In this embodiment, the upper end of the square tube 7 is provided with a grid 16.

In this embodiment, barrel 1 is cylindrical structure, and the lower extreme of barrel 1 is equipped with the chamfer.

During the concrete implementation, sewage enters the barrel 1 from the water inlet pipe 2, the water inlet pipe 2 directly stretches into the square pipe 7, the sewage directly enters the square pipe 7 to be mixed with the microbial carrier 4 in the square pipe 7, the gas enters from the air inlet pipe 12 and is ejected from the aeration disc 11 to reach the reaction area separated by the square pipe 7, the gas, liquid and solid mixture in the reaction area is driven to flow upwards and mixed mass transfer is driven, the liquid in the settling area at the two sides of the square pipe 7 flows downwards due to the flow speed difference to reach the bottom, and the liquid is driven by the gas ejected from the aeration disc 11 to flow upwards again, so that circulation is formed, the contact reaction time of the organic sewage and the microbial carrier 4 is prolonged, the oxygen utilization rate and the treatment efficiency of the organic sewage difficult to degrade are improved, the requirements of high-load sewage treatment can be met, and energy conservation and consumption reduction are realized.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. An internal circulation aerobic biological fluidized bed is characterized in that: mainly include barrel (1), barrel (1) is closed structure, be equipped with inlet tube (2) and outlet pipe (3) that run through barrel (1) on the lateral wall of barrel (1), inlet tube (2) set up in the lower extreme of barrel (1) one side, outlet pipe (3) set up in the upper end of barrel (1) one side, be equipped with inner loop reflux unit, aeration equipment, microorganism carrier (4), baffle (5) and overflow weir (6) in barrel (1), wherein:

the internal circulation reflux device is arranged in the middle of the barrel body (1) and consists of a square pipe (7) and four supporting plates (8), the four supporting plates (8) are symmetrically arranged on two sides of the square pipe (7), through holes (9) are formed in the supporting plates (8), the through holes (9) in the two adjacent supporting plates (8) are staggered, and the microorganism carriers (4) are arranged in the square pipe (7);

the aeration device comprises an aeration disc (11), an air inlet pipe (12) and a supporting base (13), wherein the air inlet pipe (12) is arranged at the bottom end of the barrel (1) through the supporting base (13) arranged at the bottom end of the air inlet pipe (12), one end of the air inlet pipe (12) penetrates through the barrel (1) and extends out of the barrel (1), the aeration disc (11) is reversely arranged at the lower end of the air inlet pipe (12) in a 180-degree rotating mode, and the aeration disc (11) is located at the lower end of the square pipe (7);

the flow guide body (5) is arranged at the bottom of the barrel body (1), the flow guide body (5) is formed by splicing a plurality of flow guide plates, the flow guide plates are symmetrically arranged adjacent to each other, and a sludge discharge pipe (15) is arranged at the concave bottom of the flow guide body (5);

the overflow weir (6) is arranged at the top of the cylinder body (1), and the position of the overflow weir (6) corresponds to the position of the water outlet pipe (3).

2. The internal circulation aerobic biofluid bed according to claim 1, wherein: the upper end of the square pipe (7) is provided with a grid (16).

3. The internal circulation aerobic biofluid bed according to claim 1, wherein: the barrel (1) is of a cylindrical structure, and a chamfer is arranged at the lower end of the barrel (1).