KR20200144799A - Semi dry anaerobic digester apparatus - Google Patents

Abstract

The disclosed technology relates to a semi-dry anaerobic digester apparatus, which comprises: an acid reactor formed in a cylinder and provided with a plurality of stirring shafts extending to the bottom through the top of the cylinder and rotating the plurality of stirring shafts to stir the organic material supplied into the cylinder; a methane reactor for generating methane by receiving the organic material stirred in the acid reactor and discharging the precipitate through a funnel-shaped discharge part having a diameter gradually narrowed at the bottom; a transfer pipe having one end coupled to a connection flange provided in the acid reactor and the other end coupled to a connection flange provided in the methane reactor to transport the organic material; and a chassis having the transfer pipe and at least one other transfer pipe mounted on the upper surface of the body at equal intervals, and moving left and right by using a wheel provided on the lower surface of the body to replace the transfer pipe with the at least one other transfer pipe, when the transfer pipe is clogged. Thus, when the pipe is clogged, there is an effect of quickly replacing the pipe with another pipe provided on the chassis.

Description

Semi-dry anaerobic digester system {SEMI DRY ANAEROBIC DIGESTER APPARATUS}

The disclosed technology relates to an apparatus for anaerobic digestion of organic matter having a high solid content of about 5% to 15%.

Anaerobic digestion, a method of digesting organic matter, is a method of converting high-concentration organic substances such as food, livestock waste, sewage sludge, and manure into biogas containing methane after hydrolysis using anaerobic bacteria. The purpose of this anaerobic digestion is to finally convert the organic matter into biogas after introducing the organic matter that has undergone crushing or selection process into the anaerobic reactor.

On the other hand, in the conventional wet anaerobic digester, the moisture content of organic matter is about 97%. That is, since the solid content is about 3%, clogging of the inside of the reaction tank or the pipe connecting the reaction tank is less likely to occur. However, in the case of organic matters with a moisture content of around 90%, the concentration of solids contained in the organic matter is relatively higher, so the organic matter has a higher viscosity or becomes hardened, so that organic matter accumulates in the lower part of the reaction tank or the inside of the connected pipe is blocked. there was.

Referring to Korean Patent Registration No. 10-1819203 (name of the invention: anaerobic digestion system of high-concentration organic waste), a technology for preventing hardening by applying heat to sludge of a return line is disclosed. However, this technology has a disadvantage that a high cost is involved because the transfer line must be maintained at a high temperature, and there is a problem in that the replacement work is difficult due to the high temperature of the transfer line.

The disclosed technology is to provide an apparatus for anaerobic digestion by transferring organic matter having a solids concentration of 5% to 15%.

In order to achieve the above technical problem, the first aspect of the disclosed technology is formed in a cylinder and provided with a plurality of stirring shafts extending to the bottom through the upper end of the cylinder, and the organic material supplied into the cylinder by rotating the plurality of stirring shafts. An acid reaction tank for stirring, a methane reaction tank for generating methane by receiving the organic material stirred in the acid reaction tank and discharging the precipitate through a funnel-shaped discharge portion gradually narrowing in diameter at the bottom, and a connection flange provided in the acid reaction tank One end is coupled and the other end is coupled to the connection flange provided in the methane reaction tank to mount the transfer pipe for transferring the organic matter, the transfer pipe and at least one other transfer pipe on the upper surface of the body at equal intervals, and the transfer pipe is It is to provide a semi-dry anaerobic digester device including a movable undercarriage that moves left and right using a wheel provided on a lower surface of the body in order to replace it with the at least one other transfer pipe when clogged.

Embodiments of the disclosed technology may have effects including the following advantages. However, since it does not mean that the embodiments of the disclosed technology should include all of them, the scope of the rights of the disclosed technology should not be understood as being limited thereto.

According to an embodiment of the disclosed technology, the semi-dry anaerobic digester apparatus has an effect of rapidly replacing the transfer pipe when the transfer pipe is blocked using a mobile chassis.

In addition, there is an effect of efficiently transferring organic substances by applying pressure to the transfer pipe.

1 is a side view of a semi-dry anaerobic digester apparatus according to an embodiment of the disclosed technology.
2 is a view showing a mobile chassis.
3 is a view showing a plurality of pipes provided on the mobile chassis.
4 is a view showing a piston pump applying pressure to a transfer pipe.
5 is a view showing a connection flange.
6 is a view showing a watertight device for maintaining the airtight state of the stirring shaft.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as 1st, 2nd, A, B, etc. may be used to describe various components, but the components are not limited by the above terms, and only for the purpose of distinguishing one component from other components. Is only used. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Singular expressions in terms used herein should be understood as including plural expressions unless clearly interpreted differently in context. And the term "comprises" means the existence of a set feature, number, step, action, component, part, or a combination thereof, but one or more other features or number, step-action component, part It is to be understood that it does not exclude the possibility of the presence or addition of or combinations thereof.

Prior to the detailed description of the drawings, it is intended to clarify that the division of the constituent parts in the present specification is merely divided by the main function that each constituent part is responsible for. That is, two or more constituent parts to be described below may be combined into one constituent part, or one constituent part may be divided into two or more according to more subdivided functions.

In addition, each of the constituent units to be described below may additionally perform some or all of the functions of other constituent units in addition to its own main function, and some of the main functions of each constituent unit are different. It goes without saying that it may be performed exclusively by. Therefore, the presence or absence of each component described through the present specification will be functionally interpreted.

1 is a side view of a semi-dry anaerobic digester apparatus according to an embodiment of the disclosed technology. Referring to FIG. 1, the semi-dry anaerobic digester device includes an acid reactor 110, a methane reactor 120, a transfer pipe 130, and a movable chassis 140.

The acid reaction tank 110 is formed in a cylindrical shape, and organic substances are introduced into it. The acid reaction tank is provided with a plurality of stirring shafts (110a) extending to the bottom through the upper end of the cylindrical body. In one embodiment, a stirring shaft may be provided one by one to the left and right based on the center of the cylinder. Of course, a larger number of stirring shafts may be provided so that the organic material can be stirred faster.

Meanwhile, a fan is connected to one end of the plurality of stirring shafts. And as the stirring shaft rotates, the fan rotates to stir the organic matter. To this end, an electric motor 110b or a driving motor for rotating the fan may be connected to the opposite direction of the end of which the fan is connected.

Meanwhile, a piston 110c for height adjustment is provided on the plurality of stirring shafts 110a. The acid reaction tank 110 may agitate organic substances while maintaining different heights of the fan inside the body. To this end, by using the piston 110c, one stirring shaft may be adjusted to be positioned at the middle of the cylinder by applying pressure to the lower portion of the cylinder and reducing the pressure on the other stirring shaft. In an embodiment, the acid reaction tank 110 may be provided with two stirring shafts, and the organic matter may be stirred while the fans of the two stirring shafts maintain different heights. Alternatively, the organic material may be stirred while controlling the height of each stirring shaft so that the fans of the two stirring shafts intersect. Alternatively, the organic material may be stirred while rotating the fans of the two stirring shafts in different directions. That is, the stirring shaft can be controlled in various ways so that organic matter can be evenly mixed.

On the other hand, the acid reaction tank 110 may be further provided with a bearing shaft (110d) to prevent the vibration generated when the stirring shaft (110a) rotates. Due to the bearing shaft 110d, it is possible to prevent cracking or damage due to vibration in the acid reaction tank 110.

The methane reaction tank 120 generates methane by receiving the organic matter stirred in the acid reaction tank, and discharges the precipitate through a funnel-shaped discharge part gradually narrowing in diameter at the bottom. The methane reactor 120 has the same cylindrical shape as the acid reactor 110. The organic material in which the acid reaction has occurred in the acid reaction tank 110 is transferred to the methane reaction tank 120 so that the methane reaction occurs. That is, if the first half of the digestion process is performed in the acid reactor 110, the second half of the digestion process is performed in the methane reactor 120.

Meanwhile, the methane reactor 120 is also provided with a stirring shaft capable of moving up and down inside the cylindrical pipe like the acid reactor 110. At this time, two or more sets of airtight bearings 601 may be installed on the pipe in order to maintain the airtight state of the cylindrical pipe portion on which the stirring shaft is installed.

The transfer pipe 130 connects the two reaction tanks 110 and 120 and is provided to transfer organic matter. One end of the transfer pipe 130 is coupled to a connection flange provided in the acid reaction tank 110 and the other end is coupled to a connection flange provided in the methane reaction tank to connect the two reaction tanks. In this case, a member that seals the connection flange so that organic matter does not leak out during transport may be further used.

Meanwhile, basically, one transfer pipe 130 connects the two reaction tanks 110 and 120, but a plurality of transfer pipes may be connected to the two reaction tanks 110 and 120, if necessary. For example, the acid reaction tank 110 and the methane reaction tank 120 are each provided with a plurality of connection flanges, and a plurality of transfer pipes may be coupled through the plurality of connection flanges. That is, it is possible to connect a plurality of transfer pipes in order to transfer organic matter more quickly.

On the other hand, the transfer pipe 130 is connected to a hydraulic pump that adjusts the internal pressure at both ends to transfer the organic material. That is, organic matter can be efficiently transferred by applying pressure to a transfer pipe connected in a sealed state. At this time, it is possible to use a cover that seals the connection flanges of each of the two reaction tanks so that pressure generated from the hydraulic pump does not leak out. With this cover, the contact point between the connecting flange and the transfer pipe can be completely contacted.

Meanwhile, the transfer pipe 130 is provided with hydraulic pumps at both ends. In addition, one of the connected hydraulic pumps generates pressure and the other stops pressure generation, and it is possible to suck organic matter into the transfer pipe.

The movable chassis 140 mounts the transfer pipe 130 and at least one other transfer pipe on the upper surface of the body at equal intervals. To this end, a groove may be drilled on the upper surface of the body of the chassis so that the transfer pipes can be mounted respectively. In addition, the movable chassis 140 may move left and right using a wheel provided on the lower surface of the body so that it can be replaced with at least one other transfer pipe when the transfer pipe 130 that is currently connected is blocked. Here, the movable chassis 140 can be moved vertically in the longitudinal direction with respect to the transfer pipe connecting the two reaction tanks. That is, when replacing the transfer pipe 130 that is currently connected, the body can be moved so that it can be connected to another pipe provided on the left or right side of the transfer pipe.

On the other hand, the body of the movable chassis 140 is provided with at least one sensor that detects that the transfer pipe 130 is blocked. In an embodiment, an ultrasonic sensor may be used to detect whether residual organic matter exists in the pipe after the transfer pipe 130 currently connected discharges organic matter by pressure. If the amount of residual organic matter inside the pipe is accumulated or blocked to an inappropriate degree for transporting the organic matter through the ultrasonic sensor, the manager can check this and replace it with another pipe provided in the chassis 140.

2 is a view showing a mobile chassis. Referring to FIG. 2, a plurality of pipes 130 and 131 may be mounted on the body 140a of the mobile chassis 140. As described above, basically, one transfer pipe 130 may be connected to the reaction tank, and if a plurality of connection flanges are provided in the reaction tank, a plurality of transfer pipes may be connected at the same time to increase the transfer speed of organic matter.

Meanwhile, auxiliary pipes 131 for replacement are provided on the body 140a of the chassis. If the transfer pipe 130 that is currently connected is blocked, the coupling of the transfer pipe and the connection flange is released, and the body of the chassis 140 ( 140a) One of the auxiliary pipes 131 may be adjusted to come to the position of the transfer pipe 130 by using a transfer wheel provided on the lower surface. And it is possible to resume the transfer of organic matter by connecting the connection flange again.

3 is a view showing a plurality of pipes provided on the mobile chassis. As described above, a plurality of pipes are provided on the body 140a of the mobile chassis. Each of the conveying pipes can be installed at equal intervals. To this end, a groove may be drilled on the upper surface of the body so that each of the conveying pipes can be mounted in a fixed state.

4 is a view showing a piston pump applying pressure to a transfer pipe. Referring to FIG. 4, a piston pump 401 may be used to transfer organic substances through a transfer pipe. In one embodiment, when the organic matter is transferred from the acid reactor 110 to the methane reactor 120, the left piston pump maintains a state where no pressure is applied, and the right piston pump generates pressure to keep the right valve locked. I can. According to this state, when organic matter is sucked into the transfer pipe, the left piston pump operates to close the valve, and the right piston pump releases the pressure maintenance, thereby discharging the sucked organic matter. By repeating this process, the organic matter can be transferred from the acid reactor to the methane reactor.

5 is a view showing a connection flange. 5, the connection flange 301 is provided with a cover 301a covering the periphery to prevent the pressure used when the transfer pipe transfers the organic material from leaking to the outside or the organic material being transferred from escaping into the gap of the connection flange. . The cover 301a may be formed of a material having elasticity so that the contact between the connection flange 301 and the transfer pipe is in close contact with each other and closes a minute gap. For example, it may be formed of a material such as silicone or rubber. Meanwhile, when the transfer pipe is connected to the connection flange 301, the connection flange piston 301b presses the cover 301a to maintain a close contact state. The piston 301b may maintain a close contact state by applying pressure to the cover 301a from above and below the connection flange 301 as the center.

6 is a view showing a watertight device for maintaining the airtight state of the stirring shaft. Referring to FIG. 6, the watertight device includes an inverted cup-shaped cylinder 610a and a container 610b in which the cylinder is locked. The cylinder (610a) is attached to the stirring shaft (110a). The cup-shaped cylinder 610a is kept immersed in an airtight material such as water, oil or manure slurry contained in the lower container 610b. The airtight material is used to prevent air contact and can be refilled or refilled by the manager of the reaction tank through the inlet and can be removed through the outlet. By maintaining this state, it is possible to prevent air from flowing into the methane reactor through the stirring shaft. Hereinafter, the cup-shaped cylinder is referred to as the upper cup 610a and the lower container is referred to as the lower cup 610b.

On the other hand, when the stirring shaft 110a moves up and down according to the shaft sealing part attached to the center side where the upper cup 610a rotates, the lower cup 610b is fixed to the reaction tank, but the upper cup 610a is the stirring shaft ( Since it is fixed to 110a), the state in which the upper cup 610a is locked in the lower cup 610b can be released when the agitation shaft 110a rises upward. In order to prevent this, a fixing part 620 for preventing the upper cup from being separated is provided. The fixing part 620 has a protrusion 620a that prevents the upper cup from being separated so that the upper cup does not rise together when the stirring shaft is raised upward. This protrusion 620a serves as a stopper to fix the upper cup 610a at the current position. Accordingly, air inflow can be prevented by keeping the upper cup 610a locked in the airtight material contained in the lower cup 610b.

The semi-dry anaerobic digester apparatus according to an embodiment of the disclosed technology has been described with reference to the embodiment shown in the drawings for better understanding, but this is only an example, and various modifications and variations therefrom are those of ordinary skill in the art. It will be appreciated that other equivalent embodiments are possible. Therefore, the true technical protection scope of the disclosed technology should be determined by the appended claims.

110: acid reactor 120: methane reactor
130: transfer pipe 140: mobile chassis

Claims (9)

An acid reaction tank formed in a cylinder and provided with a plurality of stirring shafts penetrating through the upper end of the cylinder and extending to the lower end, and rotating the plurality of stirring shafts to stir the organic matter supplied into the cylinder;
A methane reaction tank for receiving the organic material stirred in the acid reaction tank to generate methane, and discharging the precipitate through a funnel-shaped discharge portion gradually narrowing in diameter at the bottom;
A transfer pipe having one end coupled to the connection flange provided in the acid reaction tank and the other end coupled to the connection flange provided in the methane reaction tank to transfer the organic matter; And
The transfer pipe and at least one other transfer pipe are mounted on the upper surface of the body at equal intervals, and when the transfer pipe is blocked, the transfer pipe is moved to the left and right by using a wheel provided on the lower surface of the body to replace it with the at least one other transfer pipe. A semi-dry anaerobic digester device comprising a mobile chassis. The method of claim 1,
A semi-dry anaerobic digester apparatus in which a fan is connected to one end of the plurality of stirring shafts, and a driving motor for rotating the fan and a piston for height adjustment of the stirring shaft are provided at the other end. The method of claim 2,
Semi-dry anaerobic digester apparatus for stirring organic matter while the plurality of stirring shafts maintain different heights according to the piston. The method of claim 1,
The plurality of stirring shafts are provided with a surface passing through the upper end of the cylinder and at least one bearing to maintain an airtight state, and a watertight device for preventing air inflow around the bearing is further provided with a semi-dry anaerobic digester device. The method of claim 4,
The plurality of stirring shafts are semi-dry anaerobic digester apparatus for stirring organic matter while rotating in different directions according to the driving motor. The method of claim 1,
The acid reaction tank and the methane reaction tank are each provided with a plurality of connection flanges, a plurality of transfer pipes are coupled through the plurality of connection flanges semi-dry anaerobic digester apparatus. The method of claim 1,
The transfer pipe is connected to a hydraulic pump for controlling the internal pressure at both ends to transfer the organic material, and a semi-dry type that maintains the internal pressure by using a cover sealing the connection flange of the acid reaction tank and the connection flange of the methane reaction tank. Anaerobic digester device. The method of claim 7,
One of the hydraulic pumps connected to both ends generates pressure and the other stops pressure generation to suck organic matter into the transfer pipe. The method of claim 1,
Semi-dry anaerobic digester apparatus provided with at least one sensor for detecting that the transfer pipe is blocked on the body of the mobile chassis.

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