CN210974462U - Adaptive Variable Diameter Combined Stirring Device in Aerobic Fermentation Reactor - Google Patents

Abstract

The utility model discloses an adaptive variable diameter combined stirring device in an aerobic fermentation reactor, which comprises a fermentation tank and a stirring device, wherein the fermentation tank is an aerobic fermentation reactor and is used for aerobic fermentation; There is a feeding port, and a discharging pipe is arranged at the lower part; the stirring device is placed in the center of the fermentation tank, and is used for stirring the materials in the fermentation tank; the stirring device includes a feeding pipe arranged at the center of the fermentation tank and a Several stirring blades arranged horizontally on the feeding tube from bottom to top. By rationally designing the shape of the stirring blade in the fermentation reactor, the utility model can continuously break the gas introduced in the fermentation process, so that the air and the organic fertilizer can be fully mixed, so as to achieve the purpose of improving the fermentation efficiency; its advantage lies in the material Completion of stirring in the cylinder, aerobic ventilation, high degree of integration, short fermentation period, suitable for organic waste treatment in large-scale farms, etc., and has broad development prospects and market value.

Description

Adaptive Variable Diameter Combined Stirring Device in Aerobic Fermentation Reactor

technical field

The utility model belongs to the technical field of waste treatment and relates to aerobic fermentation technology, in particular to an adaptive variable diameter combined stirring device in an aerobic fermentation reactor.

Background technique

In recent years, with the rapid development of my country's social economy and the continuous improvement of people's living standards, the production of solid wastes with high organic content such as manure, sludge, kitchen waste, and agricultural and forestry residues is also increasing. A large amount of organic solid waste is extremely unstable. If it is not disposed of properly, it will directly release harmful gases and pollute the surrounding air. At the same time, the generated leachate will also cause secondary pollution to water bodies and soil. environmental pollution. Therefore, timely and effective disposal of organic solid waste is of great significance to the ecological environment and residents' health.

Aerobic fermentation technology takes organic solid waste as the main substrate under aerobic conditions, and realizes its stabilization and harmless treatment through the degradation process of a large number of microorganisms, and converts it into materials suitable for soil improvement. It realizes the recovery of nutrients and organic components in organic solid waste to a large extent, and is one of the typical resource disposal methods. The success of the aerobic fermentation process depends on the ability to oxygenate the fermentation broth. The mass transfer rate of oxygen into the fermentation broth should be at least equal to the minimum oxygen uptake rate caused by microbial metabolism to ensure that the oxygen consumed by microbial metabolism is fully available in the fermentation broth. Replenish. If the oxygen supply is insufficient, the fermentation process is easily transformed into anaerobic fermentation, resulting in changes in microbial metabolic pathways and metabolic rates, or the death of microorganisms.

The main problems and defects existing in the prior art include:

At present, the most commonly used methods for dealing with livestock and poultry manure in China are: direct return to the field, drying and drying. The method of direct application of livestock and poultry manure does not require investment, is simple and easy to operate, and is easy for farmers to use, but it is not convenient for large-scale application and is limited in use. In addition, the microbial composting method of livestock and poultry manure is used to artificially control the conditions required for composting, and use microorganisms to decompose it to produce organic fertilizers. However, this method has high requirements for garbage classification and high composting costs. Or poor quality affects the sales of composted products.

At present, the aerobic fermentation tank commonly used in my country is standard mechanical stirring, and the method of increasing the ventilation volume and strengthening the stirring is used to achieve the purpose of improving the dissolved oxygen coefficient. Its oxygen utilization rate is low and energy consumption is high, and with the continuous use of high-yielding strains, it is difficult for traditional fermenters to meet the increasingly high requirements for dissolved oxygen rates.

Utility model content

Aiming at the problems existing in the traditional aerobic fermentation mode, such as simple facilities and equipment, low efficiency, high energy consumption, incomplete fermentation, and low dissolved oxygen rate, the utility model provides an adaptive variable diameter combination in an aerobic fermentation reactor. The stirring device, through the reasonable design of the shape of the stirring blades of the stirring device in the fermentation reactor and the number of stirring blades in the stirring device, can continuously break the incoming gas during the fermentation process, so that the air and the organic fertilizer can be fully mixed. , the solid-liquid-gas three-phase contact is better, so as to achieve the purpose of improving the fermentation efficiency; the advantage is that the material is stirred in the cylinder, aerobic ventilation, high integration, and short fermentation period, suitable for large-scale farms It has broad development prospects and market value.

For this reason, the utility model adopts the following technical solutions:

An adaptive variable diameter combined stirring device in an aerobic fermentation reactor, comprising a fermentation tank and a stirring device, wherein the fermentation tank is an aerobic fermentation reactor and is used for aerobic fermentation; the upper part of the fermentation tank is provided with a feeding port , the lower part is provided with a discharge pipe; the stirring device is placed in the center of the fermenter to stir the materials in the fermenter; the stirring device includes a feeding pipe arranged at the center of the fermenter and a horizontally arranged from bottom to top in the Several stirring blades on the feed tube.

Further, the feeding tube has an inner hollow tubular structure and an outer helical structure, the stirring blades are distributed at intervals along the height direction of the feeding tube, and there is an included angle between two adjacent pieces in the transverse direction.

Further, the stirring blade is connected with a worm through a turbine, and the worm is arranged at the inner center of the feeding tube.

Further, the upper part of the worm is provided with an inner bearing, the outer side of the inner bearing is provided with an inner sprocket, and the inner sprocket is connected with the corresponding transmission system through the inner transmission chain.

Preferably, the lower part of the feed pipe is connected to an air delivery pipe, and the gas delivery pipe is connected to the air storage tank and the air compressor in turn; the upper and lower parts of the feed pipe are provided with outer bearings and circlips, and the upper part of the feed pipe has an outer bearing. An outer sprocket is arranged on the outer side of the device, and the outer sprocket is connected with the external transmission system through the outer transmission chain.

Preferably, a sealing ring is provided on the upper part of the feeding tube.

Preferably, the inside of the stirring blade is hollow and communicates with the inside of the feeding tube.

Preferably, the surface of the stirring blade is provided with several through-type aeration holes.

Compared with the prior art, the beneficial effects of the present utility model are:

(1) Feeding the material through the feeding tube can make the fermentation of the material more uniform, and the feeding operation can also indirectly play the role of smashing the material, and can also provide oxygen for the interior of the material, so that the material is not in the process of continuous feeding. will be in an anaerobic state. In the high temperature stage, the introduction can also reduce the temperature of the material. When the internal temperature of the fermenter is higher than 70 ℃, if the material is introduced, most of the medium and low temperature microorganisms in the fermenter will be killed. The most important thing is such a high temperature It will speed up the decomposition of materials and greatly increase the loss of materials. Therefore, the temperature higher than 70 °C is unfavorable for fermentation. Generally, the temperature of compost is controlled at about 60 °C. The feeding tube is an effective measure to reduce the temperature. The decomposing of good materials can be accelerated and the fermentation time can be greatly shortened.

(2) The use of stirring blades for stirring and aeration can not only make the air entering the tank well broken and distributed, so as to increase the gas-liquid contact area in the tank, which is conducive to the transmission of oxygen and the mixing of fermentation liquid, but also can Effectively circulate the solid-gas-liquid in the fermentation tank to promote the up and down exchange of materials in each layer.

(3) The transmission direction of the stirring blade is controlled by the transmission system, which can further improve the overall flow circulation in the fermentation tank. The larger circulation amount ensures the sufficient stirring of the organic matter and can promote the good up and down mixing of the organic matter in the tank; The length and angle of the stirring blade can be controlled, and the large air bubbles can be broken into tiny air bubbles, which can be evenly dispersed up and down the impeller, which can effectively suppress the phenomenon of air flooding caused by large ventilation volume, and also avoid the occurrence of stirring blind spots or overlapping. affect the fermentation effect.

(4) The material is stirred in the cylinder, aerobic ventilation, high degree of integration, short fermentation period, suitable for organic waste treatment in large-scale farms, etc., and has broad development prospects and market value.

Description of drawings

1 is a front view of an adaptive variable diameter combined stirring device in an aerobic fermentation reactor provided by the present invention.

2 is a top view of an adaptive variable diameter combined stirring device in an aerobic fermentation reactor provided by the present invention.

3 is an axial view of an adaptive variable diameter combined stirring device in an aerobic fermentation reactor provided by the present invention.

Fig. 4 is an axial view of a feed pipe in an adaptive variable diameter combined stirring device in an aerobic fermentation reactor provided by the present invention.

5 is an axial view of a stirring blade in an adaptive variable diameter combined stirring device in an aerobic fermentation reactor provided by the present invention.

Description of reference numerals: 1. Outer transmission chain; 2. Inner transmission chain; 3. Outer sprocket; 4. Inner sprocket; 5. Inner bearing; 6. Outer bearing; , air storage tank; 10, air compressor; 11, air pipe; 12, discharge pipe; 13, stirring blade; 14, feed pipe; 15, worm; 16, turbine; 17, sealing ring; 18, feed port ; 19. Aeration holes.

Detailed ways

The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the specific embodiments and descriptions are only used to explain the present utility model, but are not intended to limit the present utility model.

Example

An adaptive variable diameter combined stirring device in an aerobic fermentation reactor, the stirring device mainly has three functions, namely: feeding, stirring and aeration. The specific structure is as follows:

As shown in Figure 1-Figure 3, a stirring device is provided inside the fermentation tank 8, the upper part of the fermentation tank 8 is provided with a feeding port 18, and the lower part is provided with a discharge pipe 12; the stirring device is placed in the center of the fermentation tank 8;

The stirring device includes a feed pipe 14 longitudinally arranged at the center of the fermenter 8 and six stirring blades 13 laterally arranged on the feed pipe 14 from bottom to top; the stirring blades 13 are evenly distributed along the height direction of the feed pipe 14, The angle between the adjacent two stirring blades 13 is 120°.

As shown in FIG. 4 , the feed pipe 14 has an inner hollow tubular structure and an outer helical structure. The lower part of the feed pipe 14 is connected to the air pipe 11 , and the air pipe 11 is connected to the air storage tank 9 and the air compressor 10 . The upper part of the feeding tube 14 is provided with an outer bearing 6 and a retaining spring 7 ; the outer side of the outer bearing 6 is provided with an outer sprocket 3 structure; the outer sprocket 3 is provided with an outer transmission chain 1 .

As shown in FIG. 5 , the stirring blade 13 is connected to the worm 15 through the turbine 16, and the worm 15 is arranged at the inner center of the feeding tube 14; the upper part of the worm 15 is provided with an inner bearing 5, and the outer part of the inner bearing 5 There is an inner sprocket 4 structure; the inner sprocket 4 is provided with an inner transmission chain 2; when the worm 15 rotates, it drives the turbine 16 to rotate, thereby changing the angle and length of the stirring blade 13; the length of the stirring blade 13 and The angle can be adjusted by the structure of the turbine 16 and the worm 15 in the introduction tube 14 .

The inside of the stirring blade 13 is hollow and connected with the inside of the feeding tube 14 ; the surface of the stirring blade 13 is provided with a through-type aeration hole 19 .

The working process of an adaptive variable diameter combined stirring device in an aerobic fermentation reactor is as follows:

During operation, the material enters through the feeding port 18. After starting the transmission system, the transmission system drives the outer sprocket 3 through the outer transmission chain 1, and the outer sprocket 3 drives the feeding tube 14 to rotate through the outer bearing 6.

The feeding tube 14 is provided with an outer bearing 6 and a retaining spring 7 up and down, and only the upper part is provided with a sealing ring 17; at this time, the material is continuously guided from the lower part of the fermentation tank 8 to the upper part with the rotation of the feeding tube 14 to achieve self- The effect of bottom-up priming.

In addition, the transmission system drives the inner transmission chain 2 to drive, the inner transmission chain 2 drives the inner sprocket 4 to drive, the inner sprocket 4 drives the worm 15 to rotate through the inner bearing 5, and the worm 15 drives the turbine 16 to rotate, thereby adjusting the angle of the stirring blade 13 And the elongation length to achieve the best stirring effect.

At the same time, the air compressor 10 continuously presses the air into the air storage tank 9, and enters the inside of the feed pipe 14 through the air delivery pipe 11. The interior of the feed pipe 14 is connected with the hollow stirring blade 13. When the high-pressure air enters the stirring blade 13, the stirring blade The aeration hole 19 on the 13 is output to achieve the effect of aeration.

When the fermentation is over, the material is discharged from the discharge pipe 12.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (8)

1. The utility model provides an adaptive variable footpath combination agitating unit in aerobic fermentation reactor, includes fermentation cylinder (8) and agitating unit, its characterized in that: the fermentation tank (8) is an aerobic fermentation reactor and is used for aerobic fermentation; the upper part of the fermentation tank (8) is provided with a feed inlet (18), and the lower part is provided with a discharge pipe (12); the stirring device is arranged at the center of the fermentation tank (8) and is used for stirring the materials in the fermentation tank; the stirring device comprises a material guiding pipe (14) arranged at the center of the fermentation tank (8) and a plurality of stirring blades (13) transversely arranged on the material guiding pipe (14) from bottom to top.

2. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 1, wherein: the material guiding pipe (14) is of an internal hollow tubular and external spiral structure, the stirring blades (13) are distributed at intervals along the height direction of the material guiding pipe (14), and an included angle exists between every two adjacent transverse plates.

3. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 2, wherein: the stirring blade (13) is connected with a worm (15) through a turbine (16), and the worm (15) is arranged in the center of the interior of the material guiding pipe (14).

4. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 3, wherein: the upper portion of worm (15) is equipped with inner bearing (5), and the outside of inner bearing (5) is equipped with interior sprocket (4), and interior sprocket (4) link to each other with corresponding transmission system through interior driving chain (2).

5. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 1, wherein: the lower part of the material guiding pipe (14) is connected with a gas conveying pipe (11), and the gas conveying pipe (11) is sequentially connected with a gas storage tank (9) and an air compressor (10); the upper portion and the lower portion of the material guiding pipe (14) are respectively provided with an outer bearing (6) and a clamp spring (7), the outer side of the outer bearing (6) on the upper portion of the material guiding pipe (14) is provided with an outer chain wheel (3), and the outer chain wheel (3) is connected with an external transmission system through an outer transmission chain (1).

6. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 5, wherein: and a sealing ring (17) is arranged at the upper part of the material guiding pipe (14).

7. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in any one of claims 1 to 6, wherein: the stirring blades (13) are hollow and communicated with the inside of the material guiding pipe (14).

8. The adaptive variable-diameter combined stirring device in the aerobic fermentation reactor as claimed in claim 7, wherein: the surface of the stirring blade (13) is provided with a plurality of through aeration holes (19).

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