KR20150080197A - Energy saving type anaerobic digestion vessel for waste processing - Google Patents

Abstract

In addition to a drive source for introducing influent water into the digester, it is necessary to use a stirrer inside the digester and a means for improving the mixing efficiency by circulating the leachate, An improved structure of an anaerobic digester for the treatment of energy-saving wastes is disclosed which allows the waste to be stirred and mixed with digested sludge sufficiently without the use of a separate energy source. The present invention relates to a digester having an upper opening; A cover provided with a gas exhaust pipe and installed above the digester to seal the digester; An influent pipe installed on one side of the digester; A treated water pipe installed at a lower side of the digester; And an inlet compartment provided in the center of the digester and supplied with influent water from the inlet pipe, the anaerobic digester having an upper portion opened between the digester and the inlet correlation, Wherein the inlet port is provided with a shielding portion and an inlet port through which the inflow water flowing into the inlet port is discharged to the inside of the separating jacket, Wherein a groove is formed and a first guide is provided at one end thereof in the upper part of the outflow groove so as to surround the inlet and the other end is inclinedly extended from the one end.

Description

[0001] ENERGY SAVING TYPE ANAEROBIC DIGESTION VESSEL FOR WASTE PROCESSING [0002]

The present invention relates to an anaerobic digester capable of decomposing organic wastes such as food or livestock wastes to generate digestion gas. More specifically, the present invention relates to an anaerobic digester capable of minimizing energy consumption in the digestion tank, .

Anaerobic digestion is a biological treatment for the stabilization of food, livestock waste, sewage sludge, manure, and high concentration organic wastewater. Under anaerobic conditions, the anaerobic digestion process hydrolyzes polymeric organic matter by the action of anaerobic bacteria and anaerobic bacteria, Volatile fatty acids such as nitric acid, and then finally gasified into methane, carbon dioxide, ammonia and hydrogen sulfide.

In this anaerobic digestion method, the amount of biological sludge generated per unit organic matter is remarkably smaller than that of the aerobic treatment method, and a considerable proportion of methane that can be converted into fuel is generated in the discharged digestion gas. The digestion sludge is rich in nitrogen, phosphorus and humus, It has a high merit, and besides its simple decomposition and treatment function of waste, it is attracting attention as an eco-friendly resource recycling processing technique which produces fuel and compost.

In Patent Publication No. 086149, a process for treating semi-liquid and semi-solid organic wastes through anaerobic digestion has been disclosed. As shown in Fig. 1, the wastes brought into the treatment facility are crushed and screened Treated in a paste state with impurities removed, and then decomposed into digested gas, supernatant and digested sludge in the anaerobic digestion system.

2, the conventional anaerobic digestion apparatus is an enclosed circular water heating type fire extinguishing system 10 provided with an inlet correlation 15 inside and is introduced into the inlet correlation pipe 150 through the inlet pipe 13 The semi-liquid waste is transferred to the lower portion of the digester 11 through the inlet corrector 150 and then decomposed into supernatant and gas by the microorganisms in the digester 15 below. An agitator 17 driven by a driving motor M is installed under the digester 11 to facilitate stirring of the waste and mixing with the upper layer digestion sludge. An exhaust pipe 12a is provided in the lid 12 of the digester 11, Is installed to discharge the extinguishing gas to the outside. An annular water channel L surrounding the digester 11 is installed in the upper part of the digester 11 and the supersonic water overflowing the upper end of the digester 11 is collected and discharged through the drainage pipe 14, A discharge pipe 19 is formed at the lower end of the discharge pipe 19 to discharge the surplus fire extinguishing sludge.

Here, in order to drive the agitator 17 for stirring the waste and promoting the mixing with the upper layer extinguishing sludge, a separate energy source such as a driving motor M is required. In this patent, The agitator 17 for rotating on the conventional horizontal plane is replaced by a traveling wheel 22 that travels along the traveling circle 21 as shown in Fig. 23 has been described as an example of the anaerobic digestion apparatus 20 that rotates the agitation shaft 24 about its axis and also rotates about the transverse axis 25, (24) is driven to require a separate energy source for stirring.

Meanwhile, in order to solve the problem associated with the agitation device using a stirring wing, a stirring shaft, a driving motor, etc., the upper part and the lower part of the digester are connected and the upper part leachate is pumped down to float the organic waste under the digester. A method of improving contact with microorganisms has been proposed, but also requires a separate driving energy source for pumping.

The present invention relates to an anaerobic digestion tank in which an agitation device inside a digestion tank or a means for improving mixing efficiency through circulation of leachate is excluded from a system requiring a separate energy source such as a driving motor, Another object of the present invention is to provide an improved anaerobic digestion tank for energy-saving waste treatment, which can sufficiently perform mixing of waste with stirring and digestion sludge without using a separate energy source for stirring in the digestion tank.

The present invention also provides an anaerobic digester capable of reducing the residence time in a relatively low-temperature digestion tank and reducing the energy consumed for increasing the reaction temperature.

In order to solve the above problems, the present invention provides a digestion tank having an upper opening; A cover provided with a gas exhaust pipe and installed above the digester to seal the digester; An influent pipe installed on one side of the digester; A treated water pipe installed at a lower side of the digester; And an inlet compartment provided in the center of the digester and supplied with influent water from the influent pipe, the anaerobic digester having an upper portion opened between the digester and the inlet correlation, Wherein the inlet port is provided with a shielding portion and an inlet port through which the inflow water flowing into the inlet port is discharged to the inside of the separating jacket, Wherein a groove is formed and a first guide is provided at one end thereof in the upper part of the outflow groove so as to surround the inlet and the other end is inclinedly extended from the one end.

The anaerobic digester further comprises a second guide formed between the inlet and the first guide for sliding the inflow water flowing out to the outlet.

Also, the second guide is formed as an inclined surface.

Also, the first guide is curved outwardly, and the inclined surface is curved downward. The present invention also provides an anaerobic digester for waste treatment.

According to the present invention, in the anaerobic digestion tank for waste disposal, the inflow water flowing in from the inlet side is flowed to the upper end and the separation jacket for allowing the effluent to flow out to the treated water pipe installed in the lower part of the digestion tank is provided to shorten the residence time even in the low temperature digester. And a second guide for sliding the inflow water flowing out into the outflow groove is provided on the periphery of the inlet and outlet of the first guide and the outflow groove, There is provided an anaerobic digestion tank for energy-saving waste treatment, which has a non-powered mixing means capable of sufficiently performing mixing of waste with stirring and digestion sludge without using an additional energy source for stirring in the digestion tank have.

In addition, the first guide provided in the periphery of the inlet tube is curved in the outward direction, and the second guide is formed in an inclined surface, and the tube is curved downwardly. By stirring the waste and mixing with the digested sludge It is possible to provide an anaerobic digester for energy-saving waste treatment capable of maximizing efficiency.

1 is a view for explaining a process of treating semi-liquid and semi-solid organic wastes by conventional anaerobic digestion,
2 and 3 are views showing a conventional anaerobic digestion apparatus,
4 is a perspective view schematically showing an anaerobic digester for waste treatment according to the first embodiment of the present invention,
5 is a perspective view schematically showing an anaerobic digester for waste treatment according to a second embodiment of the present invention,
FIG. 6 is a schematic cross-sectional view (A-A ') of the digester of FIG. 5,
7 is a perspective view schematically showing an anaerobic digester for waste treatment according to a third embodiment of the present invention,
8 is a schematic cross-sectional view (B-B ') of the digester of FIG. 7;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In order to clearly illustrate the present invention, parts not related to the description are omitted, and like parts are denoted by similar reference numerals throughout the specification. Also, throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements, unless specifically stated otherwise.

First Embodiment

4 is a perspective view schematically showing an anaerobic digester for waste treatment according to the first embodiment of the present invention.

Referring to FIG. 4, the anaerobic digester 100 for waste disposal according to the first embodiment of the present invention includes a digester 110 having an upper opening; A cover 120 provided with a gas exhaust pipe 121 and installed above the digester 110 to seal the digester 110; An inflow water pipe 130 installed on one side of the digester 110; A treated water pipe 140 installed on one side of the lower portion of the digester 110; And an inlet correlation unit 150 installed in the center of the digester 110 and supplied with influent water from the influent pipe 130. The anaerobic digestion tank 100 is disposed between the digester 110 and the inlet correlation unit 150, A separation jacket 160 is formed in a cylindrical shape having an opening at an upper portion thereof to allow the inflow water flowing from the inlet pipe 150 to flow to the upper end and flow out to the process water pipe 140, Two or more outflow grooves 152 are formed to allow the inflow water flowing into the shielding portion 151 and the inlet correlation 150 to flow out into the separation jacket 160, 150) and a first guide (170) extending at an opposite end from the one end in an inclined manner.

Influent water containing organic waste is introduced into the digester 110 and fermented and decomposed by the anaerobic microorganisms therein. The organic waste may be subjected to the following steps until the organic waste is introduced. For example, when food waste or agricultural waste is put into the feed tank, it is supplied to an automatic crushing sorter and automatically crushed, and the organic solid material is crushed and put into the storage tank, and the contaminants including the metal material are separated and transferred to the incinerator. The food waste put into the storage tank is stored for about 1 ~ 3 days and then put into the acid fermentation tank and hydrolyzed and fermented by acid fermentation. After acid fermentation in the acid fermentation tank, the unreacted polymer organic substance is pumped into the anaerobic digestion tank 100 according to the present invention and decomposed into carbon dioxide gas and methane gas.

The cover 120 closes the digester 110 and has a gas exhaust pipe 121 to exhaust gas generated in the digester 110. At this time, the cover 120 may be a hard material and may be installed in the form of a fixed structure. Preferably, the cover 120 may be formed of a material that can be expanded and contracted in the vertical direction according to the amount of gas generated by using a flexible film.

The inflow water pipe 130 and the treatment water pipe 140 serve to feed inflow water containing organic waste into the digester 110 and to discharge it after fermentation and decomposition in the digestion tank 110. In the present invention, The pipe 130 is installed on one side of the upper part of the digester 110 so that one end of the pipe 130 is formed on the upper part of the inlet pipe 150 so that the inflow water injected by the pump is discharged from the upper part of the inlet pipe 150. The treatment water pipe 140 may be installed on one side of the lower portion of the digester 110 to allow the treated water to be discharged to the outside water channel L formed by the separation jacket 160, The configuration will be described in more detail.

That is, the inner side of the separation jacket 160 provides a space for allowing the influent water flowing from the inlet correlation 150 to be fermented and decomposed, and the inflow water treated to the upper end of the separation jacket 160 flows outwardly, The temperature of the digester 110 can be minimized by temporarily staying in the outer channel L formed between the separation jacket 160 and the outer wall of the digester 110 until it is discharged through the outlet 140. [

The inlet correlation 150 is installed at the center of the digester 110 to guide the inflow water introduced through the inflow pipe 130 into the digester 110 by the driving force of the pump. In the present invention, a shielding portion 151 and an outflow groove 152 are provided in the aperture 150.

The shield 151 may be formed in the shape of a plate near the midpoint 150 or the middle lower end of the mouthpiece 150 and the inflow water descended through the mouthpiece 150 may not be further lowered by the shield 151, And then flows out into the separation jacket 160 through the groove 152. That is, the outflow groove 152 formed in the inlet corrector 150 near the upper portion of the shield 151 is formed to be relatively smaller than the inner diameter of the inlet corrector 150, So that the inflow water can flow out. At this time, two or more outflow grooves 152 are formed around the inlet correlation 150, preferably 6 to 8, so that the outflow grooves 152 are entirely dispersed in the digester 110.

In the present invention, the first guide 170 is installed around the inlet corrugate 150 for smooth mixing with the anaerobic microorganisms of the inflow water flowing out through the outflow groove 152. In other words, the first guide 170 is formed so that one end thereof surrounds the inlet corrugate 150 at the upper part of the outflow groove 152 and the other end thereof extends obliquely downwardly from the one end in the form of a cap, It is possible to distribute the inflow water evenly in the digestion tank 110 so that the inflow water can be mixed with the anaerobic microorganisms.

The anaerobic digestion tank 100 according to the present invention may be constructed such that the influent water flowing into the inlet correlation 150 is supplied to the shield 151 and the outflow groove 152 formed in the inlet correlation 150 without a stirrer requiring separate driving means. And the first guide 170 formed around the inlet correlation 150. [0154] As shown in FIG.

Second Embodiment

FIG. 5 is a perspective view schematically showing an anaerobic digestion tank for waste treatment according to a second embodiment of the present invention, and FIG. 6 is a schematic cross-sectional view (A-A ') of the digestion tank of FIG.

Referring to FIGS. 5 and 6, the anaerobic digester 200 for waste disposal according to the second embodiment of the present invention includes a digester 210 having an upper opening; A cover 220 provided with a gas exhaust pipe 221 and installed above the digester 210 to seal the digestion tank 210; An inflow water pipe 230 installed on one side of the digester 210; A treated water pipe 240 installed on a lower side of the digester 210; And an inlet correlation unit 250 disposed at the center of the digester 210 and supplied with influent water from the influent pipe 230. The anaerobic digestion tank 200 is disposed between the digester 210 and the inlet correlation unit 250, A separating jacket 260 is formed in a cylindrical shape having an opening at an upper portion thereof to allow the inflow water flowing from the inlet pipe 250 to flow to the upper end and flow out to the process water pipe 240, Two or more outflow grooves 252 are formed to allow the inflow water flowing into the shielding portion 251 and the inlet port 250 to flow out into the inside of the separation jacket 260, A first guide 270 that surrounds the inlet 250 and extends at an opposite end from the one end and is slidably connected to the inlet 250 and the first guide 270 to slide the inflow water outflowed into the outlet 252, 2 guide 280 is installed. Hereinafter, a configuration different from the first embodiment will be mainly described.

The second guide 280 is additionally installed in the anaerobic digestion tank 200 according to the second embodiment of the present invention in the first embodiment.

5, one end of the second guide 280 is attached to the outer surface of the inlet tube 250, and the second guide 280 is installed in a substantially triangular shape to partition the inlet tube 250 and the first guide 270 So that the inflow water flowing out to the outflow groove 252 is slid downward. Accordingly, the inflow water is dispersed in the digestion tank 210 through the first guide 270 and the inflow water is more uniformly dispersed in the digestion tank 210 as a whole through the second guide 280, so that the anaerobic microorganisms It is possible to further improve the mixing efficiency with the water.

At this time, as shown in the drawing, the second guide 280 is attached in a serpentine shape from one side to the other in the vertical direction of the outer side of the inlet pipe 250, and gives a descending rotational force to the inflow water flowing out from the outlet groove 252 It is possible to further increase the mixing efficiency by improving the dispersibility in the digester 210.

Third Embodiment

FIG. 7 is a perspective view schematically showing an anaerobic digestion tank for waste disposal according to a third embodiment of the present invention, and FIG. 8 is a schematic cross-sectional view (B-B ') of the digestion tank of FIG.

7 and 8, the anaerobic digester 300 for waste disposal according to the third embodiment of the present invention includes a digester 310 having an upper opening; A cover 320 provided with a gas exhaust pipe 321 and installed above the digester 310 to seal the digester 310; An inflow water pipe 330 installed on one side of the digester 310; A treated water pipe 340 installed at a lower side of the digester 310; And an inlet correlation unit 350 disposed in the center of the digester tank 310 and supplied with influent water from the influent pipe 330. The anaerobic digestion tank 300 is disposed between the digester 310 and the inlet correlation unit 350, A separation jacket 360 is provided to allow the inflow water flowing from the inlet port 350 to flow to the upper end and flow out to the process water pipe 340, Two or more outflow grooves 352 are formed to allow the inflow water flowing into the shielding portion 351 and the inlet cores 350 to flow out to the inside of the separation jacket 360, A first guide 370 which surrounds the first guide 370 and extends around the first guide 370 and the other end of which is inclined from one end and a second guide 372 which is formed between the inlet guide 350 and the first guide 370 and slides the inflow water flowing out to the outflow groove 352 2 guide 380 is provided, and the first guide 370 is provided in the outward direction And the inclined surface of the second guide 380 is curved downward. Hereinafter, a configuration different from the second embodiment will be mainly described.

The anaerobic digestion tank 300 for waste disposal according to the third embodiment of the present invention has a structure that maximizes the mixing efficiency of influent water through the shape modification of the first guide 370 and the second guide 380 in the second embodiment, to be.

That is, the first guide 370 is curved outwardly, the inclined surface of the second guide 380 is curved downward, and the initial discharge pressure of the inflow water flowing out from the outflow groove 352 and having the raised discharge pressure is maximized So that the mixing efficiency with the anaerobic microorganisms of the influent water can be maximized through the improved dispersibility.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.

100, 200, 300: anaerobic digestion tank 110, 210, 310: digester
120, 220, 320: covers 121, 221, 321: gas exhaust pipes
130, 230, 330: Inflow water pipe 140, 240, 340: Process water pipe
150, 250, 350: input correlation 151, 251, 351:
152, 252, 352: outflow grooves 160, 260, 360: separation jacket
170, 270, 370: first guide 280, 380: second guide
L: outer channel

Claims (4)

A digester having an open top; A cover provided with a gas exhaust pipe and installed above the digester to seal the digester; An influent pipe installed on one side of the digester; A treated water pipe installed at a lower side of the digester; And an inlet port provided at the center of the digester and supplied with influent water from the inlet water pipe, the anaerobic digester comprising:
A separation jacket is formed in a tubular shape having an upper portion opened between the digester and the inlet correlation so that the inflow water flowing in from the inlet is overflowed to the upper end and flows out to the process water pipe,
Wherein the inlet port is formed with two or more outflow grooves for allowing a shielding portion and inflow water introduced into the inlet port to flow out into the inside of the separating jacket,
Wherein the first guide is provided with a first guide which is formed at one end thereof on the upper part of the outflow groove and which extends around the mouth of the mouthpiece and whose other end extends from the one end in an inclined manner. The method according to claim 1,
And a second guide formed between the first guide and the first guide for sliding the inflow water flowing out to the outflow groove. 3. The method of claim 2,
Wherein the second guide is formed as an inclined surface. The method of claim 3,
Wherein the first guide is curved outwardly, and the inclined surface is curved downward.

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