CN215667939U

CN215667939U - Biological culture device

Info

Publication number: CN215667939U
Application number: CN202121466061.9U
Authority: CN
Inventors: 李志弘; 张保安; 段磊; 杨秋婵
Original assignee: Guangdong Zhongwei Environmental Protection Biotechnology Co ltd
Current assignee: Guangdong Zhongwei Environmental Protection Biotechnology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-28
Anticipated expiration: 2031-06-29

Abstract

The utility model provides a biological incubator, which comprises a reaction tank body, a three-phase separator, a water inlet, an exhaust port, a water outlet and a circulating water communicating port, wherein the water inlet is positioned at the bottom of the reaction tank body, the exhaust port is positioned at the top of the reaction tank body, the water outlet and the circulating water communicating port are positioned on the opposite side of the side wall of the reaction tank body, the three-phase separator is positioned at the upper part of an inner cavity of the reaction tank body and is communicated with the inner cavity, the three-phase separator is respectively communicated with the exhaust port, the water outlet and the circulating water communicating port, the water inlet and the circulating water communicating port are communicated through a circulating pump and a connecting pipeline which can adjust the speed and provide circulating water for the inner cavity of the reaction tank body, a venturi tube component for supplying oxygen to the inner cavity of the reaction tank body is communicated between the circulating pump and the water inlet, and the water inlet direction of the water inlet is parallel to the inner side wall of the reaction tank body. The setting of water inlet can form the whirl effect, and the shearing force of rivers self whirl effect compares mechanical stirring effect and reduces greatly, can prevent the depolymerization of floc in the flocculent granule mud. Oxygen is supplied through the venturi assembly, the oxygen amount is controllable, and the rotational flow effect of the water inlet is not influenced.

Description

Biological culture device

Technical Field

The utility model relates to the technical field of environment-friendly microorganisms, in particular to an aerobic microorganism culture apparatus, and more particularly relates to an aerobic sludge culture apparatus with self-oxygen-absorption rotational flow stirring.

Background

Compared with common activated sludge, the aerobic sludge has the characteristics of difficult sludge bulking, strong impact resistance, capability of bearing high organic load, integration of microorganisms with different properties (aerobic, facultative and anaerobic microorganisms) and the like, and the research results in recent years show that the AGS can be used for treating high-concentration organic wastewater, high-salinity wastewater and a plurality of industrial wastewater. AGS was first discovered by Mishillla et al in 1991 and was first reported to be cultured using an Aerobic continuous flow Upflow Sludge bed reactor (AUSB). The study of AGS granulation began with this research effort.

Aerobic sludge is formed by aerobic fermentation culture of sludge under the action of oxygen, and the two types of equipment are mainly adopted in the traditional method, namely a bottom aeration mechanical stirring fermentation tank and an air-lift fermentation tank.

The mechanical stirring fermentation cylinder plays the bubble and improves the effect of dissolved oxygen with culture solution intensive mixing through the stirring effect, and mechanical stirring can also carry out the intensive mixing to jar interior mud and play the homogeneity effect. The mechanical stirring fermentation tank has wide application and wide application range, but the mechanical stirring of the mechanical stirring reactor has stronger shearing force, so the device is not suitable for occasions sensitive to the shearing force, such as the culture of flocculent granular sludge, and the depolymerization of flocculent is easily caused by the stirring action.

The gas-lift fermentation tank is aerated at the bottom, gas floats upwards to achieve the oxygen supply effect, and meanwhile, the culture solution is driven to generate convection by the floating of the gas to play a stirring effect. The airlift stirring reactor well solves the influence of shearing force caused by mechanical stirring, but the airlift stirring reactor can not well play a stirring and suspending role when stirring components with higher specific gravity in some culture liquids only by rising gas, for example, when a larger microorganism carrier is used in a tank, the carrier is easy to accumulate at the bottom of the tank. And the airlift fermentation tank can not well reduce the ventilation and ensure the stirring effect in the occasion of small demand for dissolved oxygen and large stirring action.

Therefore, it is necessary to develop a new biological culture apparatus to solve the problem of culture of aerobic sludge.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a self-oxygen-absorption rotational flow stirring biological culture device, which solves the problems of two fermentation culture devices, namely a bottom aeration mechanical stirring fermentation tank and an air-lift fermentation tank in the prior art.

In order to achieve the purpose, the utility model provides a biological incubator, which comprises a reaction tank body, a three-phase separator, a water inlet, an exhaust port, a water outlet and a circulating water communicating port, wherein the water inlet is positioned at the bottom of the reaction tank body, the exhaust port is positioned at the top of the reaction tank body, the water outlet and the circulating water communicating port are positioned on the opposite side of the side wall of the reaction tank body, the three-phase separator is positioned at the upper part of an inner cavity of the reaction tank body and is communicated with the inner cavity, the three-phase separator is respectively communicated with the exhaust port, the water outlet and the circulating water communicating port, the water inlet and the circulating water communicating port are communicated through a speed-adjustable circulating pump and a connecting pipeline and provide circulating water for the inner cavity, a venturi tube assembly for supplying oxygen to the inner cavity is communicated between the circulating pump and the water inlet, and the water inlet direction of the water inlet is parallel to the inner side wall of the reaction tank body.

Compared with the prior art, the water inlet of the biological incubator is arranged at the bottom of the reaction tank body, the water inlet direction is parallel to the inner side wall of the reaction tank body, a rotational flow effect can be formed under the action of the circulating pump so as to stir media (sludge, sewage, auxiliary materials and the like) in the reaction tank body, and the shearing force of the rotational flow effect of water flow is greatly reduced compared with the mechanical stirring effect, so that the biological incubator is more suitable for a culture environment with low requirement on the shearing force, and particularly can prevent the depolymerization of flocs in flocculent granular sludge. Oxygen is supplied through the venturi tube assembly before the water inlet, the oxygen amount is controllable, and the rotational flow effect of the water inlet is not influenced. Moreover, oxygen is supplied through the venturi assembly, so that the use of an air compressor is saved, and the energy consumption is saved.

Furthermore, the bottom of the reaction tank body is an upwardly protruding cone, the water inlet is formed at the joint of the side wall of the cone and the inner side wall of the reaction tank body, and preferably, the cone is a cone. The upwards protruding cone can prevent that the solid in the retort body from piling up in the center of tank bottoms after sinking in the whirl effect, and the solid of sinking can be followed the surface downstream of centrum and to the bottom edge of the retort body, then is taken away by the whirl that the water inlet arouses to play the stirring effect.

Furthermore, the bottom of the reaction tank body is provided with a sludge discharge port far away from the water inlet, and the sludge discharged through the sludge discharge port is aerobic sludge after aerobic fermentation.

Furthermore, the venturi assembly comprises a venturi connected with the circulating pump and an air inlet pipeline communicated with the narrowest part of the pipeline of the venturi, and the air inlet pipeline is provided with an adjusting valve to control air inflow. When circulating water flows in the Venturi tube, at the narrowest part of the pipeline, the speed of the circulating water rises because of the reduction of the area of the cross section of the pipeline, the dynamic pressure (speed head) reaches the maximum value, and the static pressure (static pressure) reaches the minimum value. Thereby creating a pressure differential that provides an external suction to the circulating water to draw gas from the inlet line. The automatic air suction through the venturi can be used for oxygenation without an air compressor, and the venturi has good gas-liquid mixing effect after air suction, so that the rotational flow effect of the water inlet can be further improved.

Furthermore, the water inlet is fixedly connected with one end of the three-way pipe, the other two ends of the three-way pipe are respectively connected with the venturi and a transfusion port for conveying liquid materials to the inner cavity, and liquid components can be further supplemented to the inner cavity of the reaction tank body through the transfusion port.

Furthermore, the reaction tank body is also provided with a material conveying opening for conveying solid materials to the inner cavity.

Drawings

FIG. 1 is a schematic view of a first embodiment of a biological incubator of the present invention.

FIG. 2 is a schematic view of a second embodiment of the biological incubator of the present invention.

FIG. 3 is a schematic view of the flow of liquid in the biological incubator of the present invention.

Detailed Description

The structure and the operation of the biological incubator according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 3, the biological incubator 100 includes a reaction tank 10, a three-phase separator 20, a water inlet 30 located at the bottom of the reaction tank 10, an air outlet 40 located at the top of the reaction tank 10, a water outlet 50 located at the opposite side of the sidewall of the reaction tank 10, and a circulating water communication port 60, wherein the three-phase separator 20 is located at the upper portion of an inner cavity 110 of the reaction tank 10 and is communicated with the inner cavity 110, the three-phase separator 20 is respectively communicated with the air outlet 40, the water outlet 50, and the circulating water communication port 60, the water inlet 30 and the circulating water communication port 60 are communicated with each other through a speed-adjustable circulating pump 70 and a connecting pipe 90 and provide circulating water to the inner cavity 110 of the reaction tank 10, a venturi tube assembly 80 for supplying oxygen to the inner cavity 110 of the reaction tank 10 is communicated between the circulating pump 70 and the water inlet 30, and the water inlet direction of the water inlet 30 is parallel to the inner sidewall of the reaction tank 10. The water inlet 30 of the biological incubator 100 is arranged at the bottom of the reaction tank 10, the water inlet direction is parallel to the inner side wall of the reaction tank 10, a rotational flow effect can be formed under the action of the circulating pump 70, so that media (sludge, sewage, auxiliary materials and the like) in the reaction tank 10 are stirred, the shearing force of the rotational flow effect of the water flow is greatly reduced compared with the mechanical stirring effect, and therefore the culture environment with small requirement on the shearing force is more suitable, and especially, the depolymerization of flocs in flocculent granular sludge can be prevented. Oxygen is supplied through the venturi assembly 80 prior to the water inlet 30, and the amount of oxygen is controlled without affecting the swirling action of the water inlet 30. Moreover, oxygen is supplied through the venturi assembly 80, so that the use of an air compressor is saved, and the energy consumption is reduced.

Continuing to show in fig. 1-2, the bottom of the reaction tank body 10 is an upwardly protruding cone 130, the water inlet 30 is disposed at the joint of the side wall of the cone 130 and the inner side wall of the reaction tank body 10, and the cone 130 is a cone as shown in the figure. The upward-protruding cone can prevent solids in the reaction tank body 10 from depositing in the center of the tank bottom after sinking under the action of the rotational flow, and the sinking solids can move downwards to the bottom edge of the reaction tank body 10 along the surface of the cone 130 and then are taken away by the rotational flow initiated by the water inlet 30, so that the stirring effect is achieved. In order to better take out the sludge after cultivation, a sludge discharge port 150 far from the water inlet 30 may be provided at the bottom of the reaction tank 10, and the sludge discharged through the sludge discharge port 150 is aerobic sludge after aerobic fermentation.

Continuing with FIG. 3, the venturi assembly 80 includes a venturi 810 and an intake duct 830 communicating with the narrowest part of the venturi 810, and the intake duct 830 is provided with a regulating valve 850 for controlling the amount of intake air. When the circulating water flows inside the venturi tube 810, at the narrowest portion of the pipe, the velocity of the circulating water rises due to the reduction in the area of the cross section of the pipe, the dynamic pressure (velocity head) reaches a maximum value, and the static pressure (resting pressure) reaches a minimum value. Thereby creating a pressure differential that provides an external suction to the circulating water to draw gas in the inlet duct 830. The automatic air suction through the venturi 810 can increase oxygen without an air compressor, and the venturi 810 has good gas-liquid mixing effect after air suction, so that the rotational flow effect of the water inlet can be further improved.

In the actual operation process, it is often necessary to further provide sewage to the sludge in the reaction tank 10 to dilute the concentration of the sewage to perform better stirring or provide nutrients to perform aerobic fermentation, and to further supplement other liquid components to accelerate fermentation, so an infusion port 33 may be further connected to the reaction tank 10, specifically, as shown in fig. 2, the water inlet 30 is fixedly connected to one end of a three-way pipe 31, the other two ends of the three-way pipe 31 are respectively connected to a venturi 810 and an infusion port 33 for delivering liquid materials to the inner cavity 110, the infusion port 33 controls the flow rate by a regulating valve 35, and the liquid components may be further supplemented to the inner cavity 110 of the reaction tank 10 through the infusion port 33.

It should be noted that the reaction tank 10 may also be provided with a material feeding port 170 for feeding solid materials into the inner cavity 110, which may be used to feed sludge carriers, and of course, if the top of the reaction tank 10 cannot be opened, the material feeding port 170 may also be used to feed sludge to be cultured.

The biological culture apparatus of the present invention will be described below by taking as an example the case where sludge discharged from a certain municipal sewage plant is cultured into aerobic granular sludge. Activated sludge in a concentration tank of a certain municipal sewage plant is added into a reaction tank body 10, partial sewage is discharged through a water outlet 50 to enable the sludge concentration to be 5g/L, 0.5g/L vermiculite powder is added through a material conveying port 170 to serve as a floc core of aerobic granular sludge, a circulating pump 70 is started to circularly flow the sludge in the reaction tank body 10, and an adjusting valve 850 of a venturi tube 810 is started to suck air and increase oxygen after the circulating pump 70 is started. The speed of the circulating pump 70 is adjusted in the circulating process to control the sludge in the reaction tank 10 to be effectively separated in the three-phase separator 20, wherein the gas is discharged upwards through the gas outlet 40, the solid moves downwards along the surface of the cone 130 to the bottom edge of the reaction tank 10 and then is taken away by the rotational flow initiated by the water inlet 30, so that the circulating stirring effect is achieved, one part of the liquid flows back to the bottom of the reaction tank 10 through the circulating water communicating port 60 and the circulating pump 70, and the other part of the liquid is discharged through the water outlet 50. The microorganisms in the sludge in the reaction tank 10 are aerobically fermented under the action of oxygen, and in order to provide enough nutrients for continuous culture for a period of time, municipal sewage can be further supplemented to the inner cavity 110 of the reaction tank 10 through the liquid conveying port 33, and finally aerobic granular sludge is obtained.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A biological incubator is characterized by comprising a reaction tank body, a three-phase separator, a water inlet, an exhaust port, a water outlet and a circulating water communicating port, wherein the water inlet is located at the bottom of the reaction tank body, the exhaust port is located at the top of the reaction tank body, the water outlet and the circulating water communicating port are located on the different side of the side wall of the reaction tank body, the three-phase separator is located at the upper portion of an inner cavity of the reaction tank body and communicated with the inner cavity, the three-phase separator is respectively communicated with the exhaust port, the water outlet and the circulating water communicating port, the water inlet and the circulating water communicating port are communicated through a speed-adjustable circulating pump and a connecting pipeline and provide circulating water for the inner cavity, a venturi tube assembly for supplying oxygen to the inner cavity is communicated between the circulating pump and the water inlet, and the water inlet direction of the water inlet is parallel to the inner side wall of the reaction tank body.

2. The bioreactor of claim 1, wherein the bottom of the reaction tank is an upwardly protruding cone, and the water inlet is disposed at a position where the side wall of the cone and the inner side wall of the reaction tank are connected.

3. The biological incubator as in claim 2, wherein the cone is a cone.

4. The biological incubator as recited in claim 2, wherein said reaction tank is provided with a sludge discharge port at a bottom portion thereof remote from said water inlet port.

5. The bioreactor of claim 1, wherein the venturi assembly comprises a venturi connected to the circulation pump and an air inlet pipe connected to the venturi at the narrowest part of the venturi, the air inlet pipe being provided with a control valve for controlling the amount of air to be introduced.

6. The biological incubator as claimed in claim 5, wherein the water inlet is fixedly connected with one end of a three-way pipe, and the other two ends of the three-way pipe are respectively connected with a venturi and an infusion port for delivering liquid materials to the inner cavity.

7. The bioreactor of claim 1, wherein said reaction vessel further comprises a port for delivering solid materials to said interior chamber.