KR101978754B1 - Apparatus for digesing anerobic of night soil solid state - Google Patents

Abstract

The present invention relates to an anaerobic digestion device for solid excreta, which not only softens solid excreta but also dilute toxic substances generated from an anaerobic digestion process by allowing water to permeate the solid livestock excreta through a screen wall inside an anaerobic digestion tank, can improve biogas producing efficiency and provide stable operation during anaerobic digestion of the solid livestock excreta by improving a buffering capacity, and can smoothly discharge digestate upon completion of the anaerobic digestion by forming a hopper-shaped slope in the lower part of the anaerobic digestion tank. In addition, the anaerobic digestion device for solid excreta comprises: a screen wall which stores solid livestock excreta crushed by a crushing device, and is formed in a uniplanar polygonal or circular shape in order to form a wall surface in a net shape; a main body which is formed by being separated outward from the screen wall at a fixed interval, and in which a leachate discharge port and a solid excreta discharging body are formed in the lower part thereof, and a cover is formed in the upper part thereof; a heating body which is formed on the internal wall surface of the main body in order to heat the leachate between the inner wall of the main body and the screen wall; a plurality of spraying ports which are formed on the external wall surface of the main body, and spray air or water compressed by and supplied from a compressor in order to prevent clogging of the screen wall; an injecting port which is formed on the cover on the top surface of the main body in order to inject outside water into the inside of the main body; and a gas discharging port which is formed on the cover on the top surface of the main body in order to discharge gas generated from the solid excreta inside the main body.

Description

[0001] The present invention relates to an anaerobic digestion apparatus for anaerobic digestion,

The present invention relates to an anaerobic digestion apparatus capable of easily processing solid livestock manure, and more particularly, to an apparatus for anaerobic digestion which is capable of not only softening solid manure by penetrating water into a high- To an apparatus for anaerobic digestion of solid manure which is capable of improving biogas production efficiency and stabilizing operation in anaerobic digestion of high-priced adult stomach by diluting a substance and improving buffering capacity.

Anaerobic digestion is the process by which organic matter is decomposed by various anaerobic microorganisms in an oxygen-free environment.

 The anaerobic digestion process produces biogas as a renewable energy from high concentration organic wastes such as livestock manure, and digestate remaining after digestion can be utilized as fertilizer and is widely commercialized all over the world.

The anaerobic digestion process is divided into four stages: Hydrolysis, Acidogenesis, Acetogenesis, and Methanogenesis. In particular, the hydrolysis step refers to a process in which a complex organic compound (carbohydrate, protein, lipid) is decomposed into low molecular weight substances such as sugars, amino acids and fatty acids, and the reaction rate is relatively slow compared with other steps, It is known as the Rate-Limiting step.

In general, anaerobic digestion systems are classified into liquid phase anaerobic digestion (TS <15%) and solid state anaerobic digestion (TS ≥ 15%) according to the total solids (TS).

Most of the anaerobic digestion facilities in operation in Korea are liquid anaerobic digestion of pig slurry (TS 5 ~ 10%) with low TS content. Full scale anaerobic digestion facilities for solid livestock manure are not available. In Korea, low-function livestock manure (60% or more of total livestock manure output) such as manure, cattle manure, cow manure, and poultry obtained through solid-liquid separation process has more than 60% It is necessary to develop the anaerobic digestion technology that is targeted for the same high-priced aquaria.

The high gastric emulsification rate is higher than that of the liquid anaerobic digestion system due to the high solid matter (organic matter) content, the biogas generation potential per unit volume is excellent, the energy required for heating the anaerobic digestion tank per unit solid matter (organic matter) is low and the anaerobic digestion process Although digestate has a low water content and is easy to handle and transport, it has not been developed as a raw material for anaerobic digestion because it does not have a process suitable for anaerobic digestion in high-cost anaerobic digesters. In order to increase the biogas production efficiency of the liquid anaerobic digestion system, there has been a technique of codifying the high-valued stomachs with the liquid-phase anaerobic digestion system. However, due to the nature of the liquid anaerobic digestion system, the solid matter content 14%). Therefore, it is impossible to dramatically increase the amount of high-molecular-weight milk.

The prior patent discloses a screening apparatus having a net shape and installed in a chamber and having a screen wall into which high-temperature counterbalanced manure is injected, a water spraying apparatus installed in the chamber and sprinkling water in the screen wall, , A stirring device for stirring the water and the high-temperature counterbalanced manure, a conveying device installed at the lower end of the screen wall for conveying the solid matter of the high-temperature-priced manure in which the liquid material is separated in one direction, There is provided a solid anaerobic digestion apparatus using agitation and screen walls including a discharge device for discharging water.

However, the prior art patent discloses that when the liquid material is produced, the solid material is discharged after being discharged, so that the concentration of the liquid material can not be increased more than a certain level, and water can not penetrate into the center of the solid material.

Further, there is a problem that energy is continuously consumed because the stirring device must be continuously operated.

Prior Patent: Korean Patent Registration No. 10-1716744 (Mar. 09, 2017)

The present invention not only softens solid manure by penetrating water into the high-temperature composting water through the screen wall in the anaerobic digestion tank but also dilutes toxic substances generated during the anaerobic digestion process and improves buffering capacity, The present invention provides a anaerobic digestion apparatus for anaerobic digestion, which enables digestate to be easily discharged at the end of anaerobic digestion by providing a funnel shaped slope at the lower part of the anaerobic digestion tank for improving anaerobic digestion efficiency and stable operation. There is a purpose.

According to an aspect of the present invention, there is provided a device for anaerobic digestion of a solid manure, comprising: a screen wall for storing a solid excrement of livestock to be crushed in a crushing device, the wall being formed in a polygonal or circular shape in a planar shape and having a wall; A main body formed at a predetermined distance from the outside of the screen wall, having a leachate outlet and a solid excretion outlet at a lower portion thereof and a lid at an upper portion thereof; A heating body formed on the inner wall surface of the main body and heating the leachate between the main body inner wall and the screen wall; A plurality of nozzles formed on an outer wall surface of the main body to jet air or water compressed in the compressor to the screen wall to prevent the screen wall from being clogged; And an exhaust port formed in the upper side cover of the main body to inject water into the main body of the main body and a gas outlet formed in the upper side cover of the main body for discharging gas generated from the solid manure inside the main body .

The screen wall is formed into a polygonal or circular shape on a plane, and a funnel-shaped portion is formed in a lower portion of the screen wall so that a high-priced adult dung stool (digestate) is discharged through the bottom opening and closing mouth.

The heating body is formed on a wall surface of the main body and is made of any one of a heating wire and a heating water flow tube, and the water injected into the main body of the solid manure stored in the screen wall and the leaking water remaining in the main body are easily heated .

The ejection orifice is formed on each side of the main body and is configured to pass through the main body so that the compressed air or water can drop the solid manure that can be attached to the screen wall through the ejection opening.

And an inlet port through which the leachate discharged through the discharge port flows into the main body through the pump is formed on a wall surface of the main body.

The screen-wall-shaped solid anaerobic digestion tank provided with the present invention not only softens solid manure by infiltrating water but also dilutes toxic substances generated during the anaerobic digestion process and improves buffering capacity to improve biogas production efficiency and stable anaerobic digestion Can be operated.

In addition, a large number of injection holes on the side of the anaerobic digestion tank have the purpose of eliminating the high-cost synthetic stool attached to the screen wall, and the funnel-like inclination on the lower side facilitates discharging the high-temperature stomach dung (residual after anaerobic digestion) .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the overall configuration of a solid manure anaerobic digester according to an embodiment of the present invention; FIG.
FIG. 2 is a side view of the apparatus for anaerobic digestion of solid manure according to the present invention.
FIG. 3 is a front sectional view showing the internal structure of a solid manure anaerobic digestion apparatus according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular forms disclosed. And shall not interpret it.

FIG. 1 is a view showing the entire construction of a solid-state manure anaerobic digestion apparatus according to an embodiment of the present invention, wherein solid-state manure of livestock to be crushed in a crushing apparatus is stored and formed into a polygonal or circular shape in a plane, A body 20 having a screen wall 20 formed at a predetermined distance from the outside of the screen wall 20 and formed with a leachate outlet 15 and a solid excretion discharge body at a lower portion and a lid 11 at an upper side, A heating body 30 formed on the inner wall surface of the main body 10 to heat the leachate between the inner wall of the main body 10 and the screen wall 20; (13) for spraying air or water compressed and supplied from the compressor to the screen wall (20) so as to prevent the air bag (20) from being clogged, (16) and a main body And a gas outlet 12 formed in the upper side cover 11 of the main body 10 for discharging gas generated in the solid phase inside the main body 10. [

FIG. 2 is a side view of the apparatus for anaerobic digestion of a solid manure according to the present invention, and FIG. 3 is a front sectional view showing the internal structure of a solid manure anaerobic digestion apparatus according to the present invention.

1 to 3, the screen wall 20 is formed at a predetermined distance from the inner wall surface of the main body 10, and is formed into a polygonal or circular shape in plan view, And the wall is formed in a net shape so that only the leachate discharged from the solid manure is discharged.

The screen wall 20 is formed in a funnel shape so that the solid-phase manure accumulated therein is gathered to the lower side, and an opening / closing port is formed on the floor to discharge the solid manure.

The opening / closing port is formed in a slide form that slides in a horizontal or diagonal direction in either direction, or an opening / closing body that blocks the opening / closing port through rotation.

The main body 10 has a screen wall 20 formed therein, an inner wall surface spaced apart from the screen wall 20 by a predetermined distance, a lower portion formed in a funnel shape, A solid body excretion discharge body is formed, and a lid 11 is formed on the upper side.

The lower portion of the main body 10 has a slope formed on the entire surface of the solid-state manure discharge unit 60 side so that the solid-state manure discharge unit 60 can easily collect solid manure.

An inflow port 14 through which the leachate discharged through the discharge port 15 flows into the main body 10 through the pump 40 is formed on the wall surface of the main body 10 so that the leachate flows through the connection pipe.

The discharge port 15 is provided with an on-off valve and is opened / closed under the control of the control unit to discharge the leachate to the outside.

After discharging the leachate and discharging the solid-state manure remaining in the screen wall 20 to the main body 10 through the opening and closing port, the solid-state manure discharged to the main body 10 is moved to an outside storage tank or the like A discharge member is formed in the form of a screw.

A heating body 30 is formed inside each of the wall surfaces of the main body 10 so that the solid manure is injected into the screen wall 20 and then the water or leachate water injected between the main body 10 and the screen wall 20 is heated Thereby making it easier for the solid manure to penetrate through the screen wall 20.

The heating body 30 is formed of a heating wire or a heating water flow tube so that the heated water or leachate can quickly penetrate the solid manure through the screen wall 20 to dissolve the manure in the solid manure into water to form leachate .

A plurality of jetting openings 13 are formed on each wall surface of the main body 10 and are connected to an external compressor. The compressed air or water supplied from the compressor is sprayed onto the screen wall 20 from which the solid- (20) to be removed to the inner bottom of the screen wall (20).

The reason for releasing the solid manure adhered to the screen wall 20 from the surface of the screen wall 20 is to prevent the water or the leachate from being discharged to the main body 10 side due to the solid manure adhering to the screen wall 20 .

Water supplied from the outside is supplied to the inside of the main body 10 through the injection port 16 formed in the lid 11 formed on the upper side of the main body 10 so that it can be infiltrated into the solid manure.

A gas outlet 12 is formed in the lid 11 so that the gas generated during the time when water is permeated into the solid manure and formed into leachate is discharged to the outside, .

The method of separating the solid manure and the leachate using the present invention as described above is as follows.

The solid body manure crushed in the pulverizing apparatus is opened into the cover wall 11 of the main body 10 and put into the screen wall 20 formed in the main body 10.

When the solid manure is injected into the screen wall 20, the lid 11 of the main body 10 is covered to block the inflow of foreign substances and water is introduced into the main body 10 through the inlet 16 of the lid 11. [ .

At this time, the water may be injected directly onto the solid body manure inside the screen wall 20 or into a space between the body 10 and the screen wall.

When the water is injected into the main body 10, the water is heated through the heating body 30 so that the water can easily penetrate into the inside of the solid manure through the screen wall 20.

When water is infiltrated into the solid manure, the filtrate of the solid manure flows into the water, and the water becomes leachate and flows out to the space between the screen wall 20 and the main body 10. [

When such leachate flows out for a predetermined period of time, a certain concentration of leachate is accumulated between the screen wall 20 and the main body 10, and the solid manure is permeated with water and anaerobically digested.

As a result, the solid manure can be softened and easily flowed, and the anaerobic digestion allows the solid manure to ferment quickly so that carbon dioxide and methane can be decomposed.

At this time, the solid manure is softened, and the generated carbon dioxide and methane-decomposed gas are discharged to the outside through the gas outlet 12 formed in the lid 11, and the gas is stored through the storage body connected to the gas outlet 12 It is possible.

When the solid state manure is softened, the leachate is discharged through the discharge port 15 and partially flows through the inlet 14 formed on the upper side of the main body 10 through the connection pipe connected to the discharge port 15, (10).

The reason for re-entering the leachate is that the fermented solid manure is discharged to the lower side of the main body 10 through the opening of the screen wall 20 and discharged to the outside through the solid-phase manure discharging body 60 of the main body 10 When another solid manure is injected into the screen wall 20, the leachate is refluxed and introduced into the main body 10 to increase the concentration of the leachate.

After the leachate is discharged, the solid digestate softened through the solid waste outlet 60 is drained to the outside, and the solid digestate is stored in a separate storage device or loaded on the conveying device, .

The present invention as described above has the effect of decomposing carbon dioxide and methane by infiltrating water into solid manure to produce leachate water, softening the solid manure and fermenting it.

The above-mentioned solid-state manure anaerobic digestion device is not limited to the configuration and the manner of operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

10: Body 11: Cover
12: gas exhaust port 13:
14: inlet 15: outlet
16:
20: screen wall 30: heating element
40: pump 50: opening / closing valve
60: solid waste discharge body

Claims (5)

A screen wall (20) in which solid excrements of livestock to be crushed by the crushing apparatus are stored and which are formed in a planar polygonal or circular shape and whose wall surface is formed into a net shape;
A main body 10 formed at a predetermined distance from the outside of the screen wall 20 and having a leachate outlet 15 and a solid excretion discharge body at a lower portion and a lid 11 at an upper portion;
A heating body 30 formed on an inner wall surface of the main body 10 to heat leachate between the inner wall of the main body 10 and the screen wall 20;
A plurality of nozzles 13 formed on the outer wall surface of the main body 10 to jet air or water compressed in the compressor to the screen wall 20 to prevent the screen wall 20 from being clogged;
An inlet 16 formed in the upper side lid 11 of the main body 10 to inject external water into the main body 10,
And a gas discharge port (12) formed in the upper side cover (11) of the main body (10) and discharging gas generated from the solid manure inside the main body (10)
Characterized in that the screen wall (20) is formed in a planar polygonal or circular shape, the lower portion is formed in a funnel shape so that the solid body manure is collected and discharged downward, and a door is formed on the floor to discharge the solid manure Anaerobic digestion device.
delete The method according to claim 1,
The heating body 30 is formed on a wall surface of the main body 10 and is made of any one of a heating wire and a heating water flow tube, ) Is heated so that the leachate remaining in the solid manure can easily penetrate into the solid manure.
The method according to claim 1,
The injection port 13 is formed on each side of the main body 10 and is configured to penetrate through the main body 10 so that compressed air or water can be sprayed onto the screen wall 20 and attached to the screen wall 20 Wherein the solid manure is removed from the screen wall (20).
The method according to claim 1,
Wherein an inlet port (14) for introducing the leachate discharged through the discharge port (15) into the main body (10) through a pump (40) is formed on a wall surface of the main body (10) .

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