CN204702563U - Full mixing mass transfer aerobic reactor - Google Patents

Abstract

A kind of full mixing mass transfer aerobic reactor, comprise pond body and knockout drum, knockout drum is arranged on the top of pond body, and knockout drum is provided with water inlet pipe; Be provided with bottom gas skirt and upper-part centralized gas hood in the body of pond, the top of upper-part centralized gas hood is provided with sedimentation and filtration district; Stripping tube and downcomer is provided with in the body of pond, the upper end of stripping tube and downcomer is all connected to knockout drum, stripping tube lower end is stretched in the gas skirt of bottom, and stripping tube is provided with extract mouth in upper-part centralized gas hood, and the lower end of downcomer extend into the top of bottom gas skirt; The top of bottom gas skirt is provided with aeration tube.This reactor adopts top water intake mode, entered by the knockout drum at top, fall into from top to bottom together with air lift to the muddy water mixed solution in knockout drum bottom the body of pond, participate in mass transfer together, accelerate gas-liquid cycle, eliminate the water distributor of bottom water intake mode, thoroughly solve water distributing pore blockage problem, reactor is run continuously, stable effluent quality.

Description

Fully mixed mass transfer aerobic reactor

technical field

The utility model relates to an aerobic reaction device used in the biochemical treatment stage in municipal and industrial waste water treatment, and belongs to the technical field of waste water aerobic reaction treatment.

Background technique

Various aerobic reaction wastewater treatment technologies currently used are mainly activated sludge process, SBR, CASS, A/0, A/A/O, A/A/A/O, etc. These technologies occupy a large area and require a large investment. Large, long construction period, complex operation and management, it is difficult to apply high-concentration water quality and sewage with poor biochemical properties.

At present, aerobic reactors of various structures are fed from the bottom through the water distributor, and the water inlet hole of the water distributor is often blocked, and the treatment efficiency and effect are greatly reduced.

The "three-stage circulating aerobic reactor" disclosed in Chinese patent document CN103332784B has a three-stage circulating reflux system, and is provided with upper and lower two-stage gas-solid-liquid separation areas, and has the ability of quick start-up of flocculent sludge, strong impact load resistance, and advanced The water pH value is relaxed, the growth of granular sludge is fast, the treatment energy consumption is low, the treatment efficiency is high, and the effluent water quality is stable. CN103880167B discloses the "Multistage Airlift and Separation Integrated Aerobic Granular Sludge Reactor", which is equipped with multistage gas-liquid gaslift cycle and gas-solid-liquid separation, which realizes the integration of multistage gaslift and separation, eliminating the need for The three-phase separator in the tank has fast gas-liquid circulation, good separation effect, fast gas-liquid circulation, high mass transfer efficiency, fast start-up of flocculent sludge, and can quickly generate aerobic granular sludge and granular sludge during operation. The production rate is high, the treatment energy consumption is low, the efficiency is high, and the effluent water quality is stable. CN 104478080A discloses "honeycomb type high-efficiency sinking flow aerobic reactor", which subverts the operation mode of traditional aerobic reactors, makes the bottom sludge run to the bottom at a high speed after being reversely lifted, and forms a violent mass transfer with the sewage running upwards. The mud-water mixture participates in the air lift in the whole process, and the mass transfer becomes more intense, which not only avoids sludge deposition, minimizes sludge loss, but also significantly improves the treatment efficiency, ensures the stability of the effluent water quality, and saves the gas-solid liquid separator.

Although the above-mentioned various reactors have many advantages, their water intake is also from the bottom through the water distributor, and the problem of blocking the water inlet hole of the water distributor also occurs. In addition, a three-phase separator is arranged on its upper part, which not only makes the structure complicated, but also sometimes causes sludge overflow, and the effect of gas-liquid separation is not good.

Contents of the invention

The utility model aims at the shortcomings of existing aerobic bioreactors, and provides a fully mixed mass transfer aerobic reactor with simple structure, no water inlet blockage, high treatment efficiency and good effect.

The fully mixed mass transfer aerobic reactor of the utility model adopts the following technical scheme:

The aerobic reactor includes a tank body and a gas-liquid separation tank. The gas-liquid separation tank is installed on the top of the tank body, and a water inlet pipe is arranged on the gas-liquid separation tank; a bottom gas collection hood and an upper gas collection hood are arranged in the tank body. There is a sedimentation filter area above the gas collection hood; there are air lift pipes and downpipes in the tank, the upper ends of the air lift pipes and downwater pipes are connected to the gas-liquid separation tank, and the lower end of the air lift pipe extends into the bottom gas collection hood, and the air lift The pipe is provided with a liquid extraction port in the upper air collecting hood, and the lower end of the downpipe extends above the bottom air collecting hood; an aeration pipe is arranged above the bottom air collecting hood.

A water outlet weir is arranged above the sedimentation filter area, and a water outlet pipe is arranged on the water outlet weir.

The outer periphery of the upper air collecting hood is provided with a sink, which is fixed on the inner wall of the tank, and an upflow slot for the passage of muddy water is arranged between the upper collecting hood and the upper collecting hood.

The outer periphery of the bottom gas collection hood is provided with a drain bucket, which is fixed on the inner wall of the tank, and an upflow joint for the passage of muddy water is provided between the bottom gas collection hood.

During the operation of the above-mentioned reactor, the waste water directly enters the gas-liquid separation tank at the top through the water inlet pipe, and falls to the bottom of the pool body through each downpipe. At the same time, the aeration through the aeration tube reduces the density of the mixed liquid in each gas collecting hood, and forms a density difference with the outside all the time. In the gas-liquid separation tank, the gas in the gas-liquid separation tank is released and discharged, and the mud-water mixture, together with the incoming wastewater, falls back to the tank body along the downpipe. Under the action of aeration, the mixed liquid is guaranteed to be continuously stripped in the stripping tube to form a cycle. The clear liquid is discharged out of the pool through the filter area of the sedimentation area, and the sludge is regularly discharged out of the pool through the sludge discharge pipe.

The utility model adopts the water inlet method at the top, and after entering the gas-liquid separation tank on the top, it will fall into the bottom of the pool body together with the mud-water mixture liquid lifted into the gas-liquid separation tank from top to bottom, and participate in mass transfer together, so that the wastewater can participate in the whole process of transfer. The mass transfer is more intense, which greatly improves the mass transfer efficiency and accelerates the gas-liquid cycle. At the same time, the water distributor of the bottom water inlet mode is omitted, which completely solves the problem of water distribution hole blockage, prevents sludge overflow, enables the reactor to operate continuously, has low energy consumption, high efficiency, and stable effluent quality.

Description of drawings

Fig. 1 is a structural schematic diagram of a fully mixed mass transfer aerobic reactor of the present invention.

In the figure: 1. Tank body, 2. Mud discharge pipe, 3. Bottom gas collecting hood, 4. Downpipe, 5. Air lift pipe, 6. Liquid extraction port, 7. Sedimentation and filtration area, 8. Outlet pipe, 9. Outlet weir, 10, gas-liquid separation tank, 11, exhaust port, 12, water inlet pipe, 13, aeration pipe, 14, water drop bucket.

Detailed ways

As shown in Figure 1, the fully mixed mass transfer aerobic reactor of the present utility model mainly includes a tank body 1 and a gas-liquid separation tank 10, the gas-liquid separation tank 10 is installed on the top of the tank body 1, and the gas-liquid separation tank 10 is arranged Water inlet pipe 12 is arranged. The pool body 1 adopts a steel structure, the whole structure is columnar, and the upper end is open, and the bottom gas collection hood 3 and the upper gas collection hood are arranged inside, and the outer periphery of the upper gas collection hood is provided with a sink 14, and the outer periphery of the bottom gas collection hood 3 It is also possible to set the water drop bucket, and the water drop bucket 14 is fixed on the inner wall of the pool body 1, and an upflow slot for the passage of muddy water is provided between the air collecting hood.

Above the upper gas collecting hood, a sedimentation filter area 7 is arranged, and a polyurethane filter layer is arranged in the sedimentation filter area 7, and an outlet weir 9 is arranged above the sedimentation filter area 7, and an outlet pipe 8 is arranged on the outlet weir 9. The tank body 1 is provided with an air lift pipe 5 and a plurality of downpipes 4. The air lift pipe 5 passes through each gas collection hood 3, and its upper end extends into the gas-liquid separation tank 10, and its lower end extends into the bottom air collection hood 3. The lifting pipe 5 is provided with a liquid extraction port 6 at the position in the upper gas collecting hood. The upper end of each downpipe 4 is connected with the bottom of the gas-liquid separation tank 10 and communicates with the inside of the gas-liquid separation tank, and the lower end extends into the top of the bottom gas collecting hood 3 . The airlift pipe 5 and the downpipe 4 are connected and fixed together with the upper and lower gas collecting hoods.

An aeration pipe 13 is arranged above the bottom air collecting hood 3 . The aeration pipe 13 is connected with an external air intake pipe, and the aeration pipe 13 can be connected with the air intake pipe through a jet pipe, and the jet pipe has an ejector. The aerator 13 adopts jet aeration to provide air for the aerobic reaction zone. The aeration method can also adopt blast aeration or blast plus jet aeration.

The bottom of the tank body 1 is provided with a mud discharge pipe 2, and a control valve can be provided on the mud discharge pipe 2 to form a mud discharge system. When discharging mud, open the control valve and discharge it by self-pressure.

The operation process of the above-mentioned reactor is as follows:

Waste water directly enters the gas-liquid separation tank 10 through the water inlet pipe 13, and falls to the bottom of the pool body 1 through each downpipe 4. At the same time, aeration is carried out through the aeration tube 13, and the air is brought into the tank body 1, so that the density of the mixed liquid in the tank body is reduced, and a density difference is always formed with the outside world, so the gas-liquid passes through the stripping tube 5 under the action of the external pressure. The lower port in the bottom gas collection hood 3 and the liquid extraction port 6 in the upper gas collection hood are lifted upward along the stripping pipe 5 and enter the gas-liquid separation tank 10, where the gas is released and passes through the exhaust port 11 is discharged, and the muddy water mixture, together with the waste water that enters by the water inlet pipe 13, falls back to the bottom of the pool body 1 along the downpipe 4 under the action of gravity. Under the action of aeration, the mixed solution is guaranteed to be continuously stripped in the stripping pipe 5 to form a cycle, and the purpose of rapid growth of granular sludge is achieved by means of efficient mass transfer.

The clear liquid is discharged out of the pool through the filter area 7 of the sedimentation area and the outlet weir 9 along the outlet pipe 8, and the sludge settles to the bottom of the pool under the action of gravity, and is regularly discharged out of the pool through the mud discharge pipe 2.

During the gas-liquid stripping process, the gas-liquid rises to form a negative pressure in the gas-collecting hood, and the mud-water mixture returned from the bottom of the tank body is quickly replenished from bottom to top (running upward through the gap between the gas-collecting hood and the tank body 1) ), the gas-liquid circulation is fast, and the high-concentration organic wastewater is in full contact with microorganisms in a short period of time, providing sufficient nutrients for the rapid reproduction of particulate matter and promoting biological reproduction. At the same time, with the help of high-speed shearing and scouring, the mixing efficiency and Mass transfer efficiency, rapid formation of aerobic granular sludge, fully adsorbed and degraded microorganisms and organic pollutants, and participated in the removal of pollutants. The gas-collecting hood participates in the separation of gas, solid and liquid, and the granular sludge is blocked and intercepted by the gas-collecting hood, eliminating the need for a three-phase separator.

More importantly, the top water-inflow aerobic reactor of the utility model adopts the upper water inlet, enters from the gas-liquid separation tank 10, and enters the tank from top to bottom together with the mud-water mixture that is lifted into the gas-liquid separation tank 10 The bottom of the body also participates in mass transfer, so that the wastewater enters the reactor and begins to participate in mass transfer throughout the process. The mass transfer is more intense and the mass transfer efficiency is greatly improved. At the same time, the water distributor of the bottom water inlet mode is omitted, which completely prevents the blockage of the water distribution hole and enables the reactor to operate continuously.

Claims (4)

1. a full mixing mass transfer aerobic reactor, comprise pond body and knockout drum, knockout drum is arranged on the top of pond body, it is characterized in that: knockout drum is provided with water inlet pipe; Be provided with bottom gas skirt and upper-part centralized gas hood in the body of pond, the top of upper-part centralized gas hood is provided with sedimentation and filtration district; Stripping tube and downcomer is provided with in the body of pond, the upper end of stripping tube and downcomer is all connected to knockout drum, stripping tube lower end is stretched in the gas skirt of bottom, and stripping tube is provided with extract mouth in upper-part centralized gas hood, and the lower end of downcomer extend into the top of bottom gas skirt; The top of bottom gas skirt is provided with aeration tube.

2. full mixing mass transfer aerobic reactor according to claim 1, is characterized in that: the top in described sedimentation and filtration district is provided with effluent weir, and effluent weir is provided with rising pipe.

3. full mixing mass transfer aerobic reactor according to claim 1, it is characterized in that: the periphery of described upper-part centralized gas hood is provided with gutter spout funnel, gutter spout funnel is fixed on the body inwall of pond, and the up-flow being provided with muddy water between upper-part centralized gas hood current stitches.

4. full mixing mass transfer aerobic reactor according to claim 1, it is characterized in that: the periphery of described bottom gas skirt arranges gutter spout funnel, gutter spout funnel is fixed on the body inwall of pond, and the up-flow being provided with muddy water between the gas skirt of bottom current stitches.