CN201276559Y - Stereo internal circulation stirring organic floating slag crushing device of anaerobic reaction tank - Google Patents

Abstract

A three-dimensional internal circulation stirring organic scum crushing device in an anaerobic reaction tank, characterized in that the device includes a slag discharge pipe (13) and a feed port (1) installed at the bottom, and an anaerobic tank top cover installed at the upper end (6) the anaerobic reaction tank (10), and the biogas outlet (5) installed in the center of the anaerobic tank top cover (6) and the discharge pipe (17) arranged on the upper part of the tank side; The inner wall of the body (10) is provided with at least two diversion vertical risers (9) in a uniform manner, and the upper port of the diversion vertical riser (9) is located in the anaerobic reaction tank body (10) Under the surface of the anaerobic reaction fermentation liquid in the interior, the lower port of the diversion vertical standpipe (9) is connected with the horizontally arranged diversion cover (2), and the liquid outlets of the diversion cover (2) are all in the form of It is arranged in a biased manner in the same direction, and a stirring and pulverizing device driven by a power source is arranged in the flow guide cover (2).

Description

Anaerobic reaction tank three-dimensional internal circulation stirring organic matter scum crushing device

technical field

The utility model relates to a three-dimensional internal circulation stirring organic scum crushing device for an anaerobic reaction tank. The process of reacting fermentation broth and active microorganisms in the reaction tank.

Background technique

In the currently widely used process of fermenting urban domestic sewage, livestock and poultry manure, starch wastewater, and sludge in an anaerobic reaction tank with active microorganisms, the organic scum floats in the reaction solution because the proportion of organic matter scum is smaller than that of water. The upper part of the reactor gradually forms a hard shell on the liquid surface, and at the same time, there is still incomplete anaerobic fermentation, and the material in the generator is stratified, which directly affects the biogas production rate of the reactor. In order to avoid and reduce the occurrence of the above-mentioned state, usually in the process of anaerobic reaction, the process method of circulating the liquid continuously is adopted.

The stirring of the prior art and the process and existing problems of avoiding organic scum and crust production are as follows:

1. Stirring form at the center of the anaerobic bottom. Although this process form can stir the fermented broth with higher concentration bacteria in the lower part of the tank and lower concentration bacteria in the upper part, because the organic matter scum is floating on the liquid surface, it can make the surface of the fermented liquid fermented for a long time. The formation of crusts directly affects the production of biogas.

2. Gas stirring process form. The air pump is used to pump the biogas produced on the surface of the fermentation liquid back to the lower part of the fermentation liquid to complete the internal circulation and stirring of the upper and lower liquids. This scheme still cannot avoid the occurrence of crusting on the liquid surface.

3. Anaerobic reaction tank liquid tank external circulation process form. The process plan is to install a stirrer at the lower part of the tank, and pump out the bacteria liquid with high concentration at the bottom of the tank through the pump outside the tank, and then pump it back to the upper part of the liquid surface of the tank. Although this process can reduce the formation of crusts, some organic scum and all kinds of straw, wheat straw, corn stalks and other sundries contained in the manure of livestock and poultry are still floating on the surface of the liquid, and cannot be fermented effectively, thus directly affecting Biogas production.

Contents of the invention

The purpose of this utility model is to provide a three-dimensional internal circulation stirring organic scum breaking device for anaerobic reaction tank in view of the deficiencies in the above-mentioned prior art

The purpose of this utility model can be achieved through the following technical measures:

The anaerobic reaction tank of the utility model has a three-dimensional internal circulation stirring organic scum crushing device, which includes an anaerobic reaction tank body with a slag discharge pipe and a feed port installed at the bottom, and an anaerobic tank top cover at the upper end, and an anaerobic reaction tank body installed on the anaerobic tank. The biogas outlet at the center of the top cover of the oxygen tank and the discharge pipe arranged on the upper part of the tank body; at least two diversion vertical risers (the diversion vertical vertical pipes) are evenly distributed on the inner wall of the tank body The number of pipes can be equipped according to the diameter of the anaerobic reaction tank (it can be two or more groups), and the upper port of the diversion vertical standpipe is located at the anaerobic reaction fermentation liquid level in the anaerobic reaction tank. Below, the lower port of the diversion vertical standpipe communicates with the horizontally arranged shroud, and the liquid outlets of the shroud are all set in the same direction biased mode (in order to maximize the reaction liquid around the irrigation The internal wall is divided into the tangential direction), and a stirring and pulverizing device driven by a power source is arranged in the shroud; in order to pass the organic scum floating on the liquid surface through the connected vertical vertical pipe and the horizontal shroud After being crushed by the stirring and crushing device, it is circulated to the lower part of the reaction liquid.

The mixing and pulverizing device described in the utility model is composed of a motor-driven drive shaft installed in the wind guide coaxially with the wind guide, and a blade installed at the front end of the transmission shaft; and the outer contour edge of the blade is a blade mouth structure. A pressure sensor and a pressure safety valve controlled by a solenoid valve are installed in the airtight storage air chamber formed by the top cover of the anaerobic tank and the upper liquid surface of the fermentation broth. The pressure sensor is used to collect the pressure in the storage chamber. When it exceeds or falls below the preset upper or lower pressure limit of the storage chamber, the solenoid valve controls the pressure safety valve to close or open, and at the same time controls the stirring motor to start. Or shut down, thereby guaranteeing that the pressure in the airtight storage air chamber is constant.

In the utility model, the feed pipe mouth of the discharge pipe arranged on the upper side of the reaction tank body is located below the liquid surface of the fermentation liquid, and the discharge pipe mouth is located above the liquid surface of the fermentation liquid.

The slag discharge pipe described in the utility model is installed in the lower part of the anaerobic reaction tank body, and the inner material suction port located in the anaerobic reaction tank body has a tapered structure.

The working principle of the utility model is as follows:

When the anaerobic reaction tank is filled with a certain amount of fermentation liquid and active microorganisms for fermentation and biogas is produced after a period of time, the stirring and pulverizing device is started, and the blades are driven by the transmission shaft to enter the horizontal guide from the upper port of the vertical vertical pipe. The materials in the flow hood are stirred and crushed, so that the organic scum on the upper surface of the reaction liquid (fermentation liquid) is crushed and forced to exchange the organic scum on the upper part of the reaction tank with the action of the rotating stirring and crushing blades. The lower part of the tank effectively forms a three-dimensional circulation of the reaction liquid and fully mixes up and down. Because the outer contour of the stirring and crushing blades is a blade structure, the organic matter scum and other floating matter floating on the fermentation liquid surface are broken by the stirring and crushing blades to prevent hard shells from forming on the liquid surface.

The biogas produced during the reaction is stored in a closed storage chamber located on the upper surface of the fermentation broth, and the output of the biogas is transported outward through the biogas outlet at the center of the top cover of the anaerobic tank. The sediment deposited at the bottom of the reaction tank is pumped out through the slag discharge pipe installed at the bottom through an external pump. The feed port is replenished with new reaction solution.

The utility model has the advantages of:

1. Effectively avoid the organic scum and other floating matter floating on the upper part of the reaction liquid for a long time to form a hard shell on the liquid surface, so as to ensure the normal production of gas.

2. Fully and maximally stir and mix the fermented liquid with higher concentration bacteria in the lower part of the tank and lower concentration bacteria in the upper part, so as to produce more biogas per unit time and reduce production costs , to increase the gas production rate.

3. The pressure data in the storage gas chamber collected by the pressure sensor installed in the upper storage gas chamber of the anaerobic reaction tank is automatically controlled by the electromagnetic to open and close the pressure safety valve according to the set pressure upper limit and pressure lower limit through the control program. It can guarantee the normal pressure in the storage gas chamber and ensure the safety of the anaerobic reaction tank.

Description of drawings

Fig. 1 is the main sectional view of the utility model.

FIG. 2 is a cross-sectional top view of FIG. 1 .

Serial numbers in Figure 1 and Figure 2:

1-Feed inlet, 2-Diffuser, 3-Solenoid valve, 4-Pressure safety valve, 5-Biogas outlet, 6-Reaction tank top cover, 7-Pressure sensor, 8-Organic scum, 9-Guide Flow vertical standpipe, 10-anaerobic reaction tank body, 11-blade, 12-motor, 13-slag discharge pipe, 14-anaerobic tank base, 15-transmission spindle, 16-storage gas chamber, 17. Feed tube.

Detailed ways

The utility model will be further described in conjunction with the following embodiments (accompanying drawings):

As shown in Fig. 1 and Fig. 2, the anaerobic reaction tank of the present utility model has a three-dimensional internal circulation stirring organic matter scum crushing device including a slag discharge pipe 13 and a feed port 1 installed at the bottom, and an anaerobic tank top cover installed at its upper end 6 of the anaerobic reaction tank 10, and the biogas outlet 5 installed at the center of the anaerobic tank top cover 6 and the discharge pipe 17 arranged on the upper part of the tank side; the tank 10 is installed on the base of the anaerobic tank 14, on the inner wall of the tank body 10, at least two diversion vertical risers 9 are arranged in a uniform manner, and the upper port of the diversion vertical riser 9 is located at the anaerobic reaction tank 10. Below the surface of the oxygen reaction fermentation liquid, the lower port of the diversion vertical standpipe 9 communicates with the horizontally arranged diversion cover 2, and the liquid outlets of the diversion cover 2 are all set in a manner biased in the same direction. The agitation and crushing device driven by the power source is arranged in the shroud 2; the agitation and pulverization device is installed in the shroud by the transmission main shaft 15 driven by the motor 12 coaxially with the shroud 2, installed on the The front end of the drive shaft consists of blades 11; and the outer contour edge of the blades is a cutting edge structure, and the number of blades 11 can be two symmetrically arranged, or three evenly distributed.

The utility model is equipped with a pressure sensor 7 and a pressure safety valve 4 controlled by an electromagnetic valve 3 at the airtight storage gas chamber 16 that is jointly formed by the top cover 6 of the anaerobic tank and the upper liquid surface of the fermentation liquid. More specifically, the pressure sensor 7 is installed in the airtight storage chamber 16 formed between the top cover 6 of the reaction tank and the top of the fermentation liquid, the pressure safety valve 4 controlled by the solenoid valve 3 is installed outside the anaerobic reaction tank body 10, and is connected with the airtight storage chamber 16 are connected; when the upper pressure limit and the lower pressure limit set by the pressure sensor 7, the solenoid valve 3 is activated through the control program to control the pressure safety valve 4 to open or close, thereby ensuring a constant pressure in the airtight storage chamber 16.

The feed nozzle of the discharge pipe 17 arranged on the upper part of the reaction tank body 10 side is located below the liquid level of the fermentation broth, and the discharge nozzle is positioned above the liquid surface of the fermentation broth; the slag discharge pipe 13 is installed in the anaerobic In the lower part of the reaction tank body 10, the inner suction port located in the anaerobic reaction tank body has a tapered structure.

Claims (5)

1. An anaerobic reaction tank three-dimensional internal circulation stirring organic matter scum crushing device, characterized in that: the device includes a slag discharge pipe (13) and a feed port (1) installed at the bottom, and an anaerobic tank is installed at its upper end The anaerobic reaction tank body (10) of the top cover (6), and the biogas outlet (5) installed at the center of the anaerobic tank top cover (6) and the discharge pipe (17) arranged on the upper part of the tank body side; On the inner wall of the tank body (10), be provided with at least two diversion vertical risers (9) in a uniform manner, and the upper port of the diversion vertical riser (9) is located in the anaerobic reaction tank ( 10) Under the surface of the anaerobic reaction fermentation liquid in the interior, the lower port of the diversion vertical standpipe (9) communicates with the horizontally arranged diversion cover (2), and the liquid outlet of the diversion cover (2) They are all arranged in a biased manner in the same direction, and a stirring and pulverizing device driven by a power source is arranged in the flow guide cover (2). 2. The anaerobic reaction tank three-dimensional internal circulation stirring organic matter scum crushing device according to claim 1, characterized in that: the stirring and crushing device is installed on the flow guide cover (2) coaxially The inside is composed of a transmission main shaft (15) driven by a motor (12), and a blade (11) installed on the front end of the transmission main shaft; and the outer contour edge of the blade is a cutting edge structure. 3. The anaerobic reaction tank three-dimensional internal circulation stirring organic matter scum crushing device according to claim 1, characterized in that: in the airtight storage gas composed of the top cover (6) of the anaerobic tank and the upper liquid surface of the fermentation liquid, The chamber (16) is equipped with a pressure sensor (7) and a pressure safety valve (4) controlled by the solenoid valve (3). 4. The anaerobic reaction tank three-dimensional internal circulation stirring organic matter scum crushing device according to claim 1, characterized in that: the feeding nozzle of the discharge pipe (17) arranged on the upper side of the reaction tank body (10) is located at Below the liquid level of the fermented liquid, the outlet nozzle is located above the liquid level of the fermented liquid. 5. The anaerobic reaction tank three-dimensional internal circulation stirring organic scum crushing device according to claim 1, characterized in that: the slag discharge pipe (13) is installed at the lower part of the anaerobic reaction tank (10), located in the anaerobic reaction tank The inner suction port of the body is a conical structure.

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