KR20080025386A - Anaerobic digestion apparatus for semi-liquid organic waste treatment - Google Patents

Abstract

An anaerobic digestion apparatus for generating digestion gas by degrading semi-liquid organic waste such as food waste and livestock waste is provided to improve treatment efficiency of the anaerobic digestion apparatus, reduce required volume and retention time compared with the treatment capacity, enable digestion gas to be used as fuel, and produce a compost from a treated material of the anaerobic digestion apparatus. An anaerobic digestion apparatus for semi-liquid organic waste treatment comprises: a plurality of perforated plates(141) which are installed in a stand pipe(140) such that the perforated plates cross an inner part of the stand pipe, and in which a plurality of through-holes(142) are formed; an agitation shaft(210) installed in a central part of a digestion tank(100) and driven by a drive motor(290); a traveling ring(205) which is installed along an inner peripheral surface of a lower part of the digestion tank such that the traveling ring is concentric to the agitation shaft; a lateral shaft(201) installed on a lower end of the agitation shaft perpendicularly to the agitation shaft; and hollow shafts(202) which are rotatably joined the lateral shaft, and which have a traveling wheel(204) formed on front ends thereof, and a plurality of agitation vanes(203) formed on outer peripheral surfaces thereof so as to rotate simultaneously the agitation vanes about the agitation shaft as well as the lateral shaft by rotating the agitation shaft, thereby rotating the traveling wheels along the traveling ring.

Description

Anaerobic digestion apparatus for semi-liquid organic waste treatment

The present invention relates to an anaerobic digestion apparatus that generates digestive gas by decomposing semi-liquid organic waste such as food or livestock waste, and installs a porous plate in a granulation pipe inside the extinguishing system to mix waste in the flow process of the extinguishing system. The efficiency was improved, and the stirring blades of the stirrer were doubled by being configured to allow the combined rotation of the vertical and horizontal planes.

Anaerobic digestion is a biological treatment method for stabilization of food, livestock waste, sewage sludge, manure and high concentration of organic plant wastewater. It refers to a treatment that produces volatile fatty acids such as acetic acid, propionic acid, butyric acid, and finally gasifies methane, carbon dioxide, ammonia and hydrogen sulfide.

In this anaerobic digestion method, the amount of biological sludge generated per unit organic matter is significantly lower than that of aerobic treatment, and the methane that can be fuelized in the exhaust gas is contained. The digested sludge is rich in nitrogen, phosphorus, and humus, so that fertilizer value is high. Due to its high advantages, it has been spotlighted as an eco-friendly resource recycling processing technique that produces fuel and compost in addition to simple decomposition and treatment of waste.

Figure 1 is a simplified illustration of the process of processing semi-liquid, semi-solid organic waste through the anaerobic digestion method, while the waste brought into the treatment facility goes through the crushing and sorting equipment It is treated in the form of a paste from which impurities are removed and then decomposed into digestive gas, supernatant water and digested sludge in an anaerobic digester.

Figure 2 is a representative cross-sectional view of the conventional anaerobic digestion apparatus, there is illustrated a sealed circular tank type fire extinguishing device installed granular tube 140 therein, the semi-liquid waste introduced into the granular tube 140 through the inlet tube 111 Is moved to the digestion tank 100 through the granular pipe 140, and is then decomposed into the supernatant and gas by the microorganisms in the digestion sludge lower digestive tank 100.

A stirrer 200 driven by the driving motor 290 is installed at the lower part of the digester 100 to promote agitation of the waste and mixing with the upper extinguishing sludge, and the exhaust pipe 121 is disposed on the cover 120 of the digester 100. This is installed to discharge the extinguishing gas to the outside.

In addition, the upper part of the digester 100 is provided with an annular water channel 130 surrounding the digester 100 is collected, the supernatant water overflowing the upper end of the digester 100 is collected and discharged through the drain pipe 112, A discharge pipe 113 is formed at the lower end of the digester 100 to discharge excess digested sludge.

The conventional anaerobic digestion apparatus as described above is a method of inducing contact with the digestion sludge under the digester 100 while the half-liquid waste introduced through the granular pipe 140 installed inside the digester 100 is lowered. Due to the low semi-liquid and semi-solid state of the waste to be treated, the descent in the granular pipe 140 occurs at a very slow rate, and thus, separation of components due to specific gravity differences in the flow of the waste in the digester 100 occurs. Not only may be generated, but the mixing and digestion of the digestion sludge under the digestion tank 100 having a strong decomposition by the microorganisms also had a problem that is not smooth.

That is, the conventional anaerobic digestion apparatus in the granular tube 140 is a tube installed vertically in the center of the digester 100, the semi-liquid waste introduced into the granular tube 140 is lower than the digester 100 through the granular tube 140 As it gradually descends, the structure of the granular pipe 140 proceeds in a very stable state, so that the disturbance of the waste hardly occurs, and thus water, solids and lipids constituting the waste can be separated.

In addition, even in the process of contacting the lowered waste digestion sludge under the digester 100, the conventional stirrer 200 as shown in Figure 2 is agitated by the stirrer 200 rotating on a horizontal plane, anaerobic The waste treated with the digester 100 is a semi-solid, semi-solid paste that can only rotate the stirrer 200 at a very low speed, unlike ordinary liquids. Therefore, smooth mixing between the upper and lower portions of the stirrer 200 is expected. Can not.

The present invention has been made in view of the above-described problems, the cover 120 is installed on the top of the digester 100 is sealed, the digester 100, the annular waterway 130 surrounding the top of the wall, and the digester 100 ) A riser pipe 140 installed at the center, an inflow pipe 111 for supplying semi-liquid waste to be processed into the riser pipe 140, an annular water channel 130, a cover 120, and a digester 100 In the anaerobic digestion apparatus composed of a drain pipe 112, an exhaust pipe 121, and an exhaust pipe 113 respectively installed at a lower end portion, a plurality of porous plates 141 crossing the granular pipe 140 inside the granular pipe 140. ) Is installed, the porous plate 141 is an anaerobic digestion apparatus for processing semi-liquid organic waste, characterized in that a plurality of through holes 142 are formed.

In addition, the cover 120 is installed on the top of the digester 100 is sealed, the annular waterway 130 surrounding the digester 100, the wall top, the granular pipe 140 is installed in the center of the digester 100 and , An inlet pipe 111 for supplying the semi-liquid waste to be treated into the standing pipe 140, an annular water channel 130, a cover 120, and a drain pipe 112 installed at a lower end of the digester 100, an exhaust pipe In the anaerobic digestion apparatus composed of a 121 and an exhaust pipe 113, a stirring shaft 210 driven by a driving motor 290 is installed at a center of the digester 100, and a digester ( 100) the stirring shaft 210 and the concentric running ring 205 is installed along the inner circumferential surface, the horizontal axis 201 orthogonal to the stirring shaft 210 is installed at the lower end of the stirring shaft 210, the horizontal axis 201 The hollow shaft 202 formed with a driving wheel 204 and a plurality of stirring blades 203 are rotatably coupled to the front and outer peripheral surfaces thereof, and the stirring shaft 210 rotates. As the driving wheel 204 idles along the traveling ring 205, the stirring blade 203 rotates about the axle shaft 210 and also rotates the horizontal shaft 201 about the shaft. Anaerobic digestion system for liquid organic waste treatment.

Through the present invention, the treatment efficiency of the anaerobic digestion system is improved, the required volume and residence time are reduced compared to the treatment capacity, and the size of the entire anaerobic digestion system is reduced, thereby expanding the spread of the anaerobic digestion system, fueling and producing compost gas, etc. The effect of activating eco-friendly energy and resource reproduction can be obtained.

The detailed configuration and operation principle of the present invention will be described with reference to the accompanying drawings.

First, Figure 3 is a partial cutaway perspective view of the present invention, as can be seen through the figure, a plurality of porous plates 141 are installed in the granular pipe 140 in the digester 100 of the present invention.

The porous plate 141 is installed to cross the granular pipe 140, a plurality of through-holes 142 are formed in the porous plate 141, as shown in Figure 4, semi-liquid waste introduced into the granular pipe 140 Is lowered while passing through the through-hole 142.

As the semi-liquid waste is disturbed while repeating the sorting and merging in the process of descending through the through-hole 142 as described above, unnecessary separation of the semi-liquid waste components is prevented.

A plurality of through-holes 142 formed in the porous plate 141 is constructed so as to perforate as tightly as possible to ensure the maximum communication capacity of the semi-liquid waste, and as shown in Figure 5, the through-holes of the adjacent porous plate 141 ( Maximize the disturbance effect due to the porous plate 141 by configuring so that the 142 is not overlapped as much as possible, that is, the foot of the waterline that falls from the center of the through hole 142 to the adjacent through plate 141 is not positioned inside the through hole 142. .

The semi-liquid waste dropped through the granular pipe 140 is decomposed by anaerobic microorganisms, and in this process, digestive gas such as methane and the like are formed and discharged through the exhaust pipe 121 and the drain pipe 112, respectively.

The supernatant flows through the upper part of the wall of the digester 100 and flows into the annular channel 130 surrounding the upper peripheral surface of the digester 100 and is discharged through the drain pipe 112 connected to the lower part of the annular channel 130.

On the other hand, as shown in Figures 3 to 5, the lower portion of the digester 100 is provided with a horizontal axis 201 and a hollow shaft 202 coupled thereto as a stirring means.

As shown in the present invention, the stirring means is configured such that the rotation on the vertical plane as well as the rotation on the horizontal plane can be made at the same time. This complex rotation is connected to the horizontal axis 201 on the horizontal axis to the stirring shaft 210 which is the vertical axis. This is achieved by installing the stirring blade 203 rotatably on the horizontal axis 201.

That is, as shown in FIGS. 6 and 7, a horizontal axis 201 orthogonal to the stirring shaft 210 is installed at the lower end of the stirring shaft 210 installed in the center of the digester 100 and driven by the driving motor 290. The horizontal shaft 201 is rotatably coupled to the hollow shaft 202, the driving wheel 204 and the plurality of stirring blades 203 formed on the front and outer peripheral surfaces, respectively, and the lower portion of the digester 100 is stirred. The driving ring 205 concentric with the shaft 210 is installed along the inner circumferential surface of the digester 100 so that the driving wheel 204 of the hollow shaft 202 can idle along the traveling ring 205. As the stirring shaft 210 rotates, the horizontal axis 201 rotates on the horizontal plane, and the hollow shaft 202 on which the stirring blade 203 is formed rotates on the horizontal plane and also on the vertical plane around the horizontal axis 201. It is.

As a result, a much improved stirring effect can be obtained as compared to the conventional stirring means which only rotates on the horizontal plane, and since the stirring object is half-liquid, it is possible to use only a very low speed rotation, thereby improving the stirring performance through the combined rotation on the horizontal plane and the vertical plane. Can greatly contribute to the improvement of decomposition efficiency.

On the other hand, as shown in the running wheels 204 and the driving ring 205 to form the teeth that are engaged with each other to prevent lubrication between the driving wheel 204 and the driving ring due to the semi-liquid waste to enable a stable operation It is desirable to.

1 is an illustration of anaerobic digestion facilities

Figure 2 is a representative cross-sectional view of a conventional anaerobic digester

3 is a partial cutaway perspective view of the present invention

Figure 4 is a representative cross-sectional view of the operating state of the present invention

Figure 5 is a detailed view of the granular pipe and the porous plate of the present invention

Figure 6 is a perspective view of the main portion of the stirrer extract of the present invention

Figure 7 is a hollow shaft partial cutaway perspective view of the present invention

<Code Description of Main Parts of Drawing>

100: digester

111: inlet pipe

112: drain pipe

113: discharge pipe

120: cover

121: exhaust pipe

130: annular waterway

140: winning a prize

141: perforated plate

142: through

200: Stirrer

201: horizontal axis

202: hollow shaft

203: stirring blade

204: driving wheel

205: driving ring

210: stirring shaft

290: drive motor

Claims (2)

Digestion tank 100, the cover 120 is installed on the upper part, the annular waterway 130 surrounding the upper wall of the digester 100, the granular pipe 140 is installed in the center of the digester 100, mouth An inlet pipe 111 for supplying the semi-liquid waste to be treated into the boss 140, an annular water channel 130, a cover 120, and a drain pipe 112 and an exhaust pipe 121 installed at a lower end of the digester 100, respectively. In the anaerobic digestion apparatus consisting of a) and the discharge pipe 113, Semi-liquid organic waste, characterized in that a plurality of perforated plate 141 traversing the riser tube 140 is installed inside the granular tube 140, the plurality of through-holes 142 are formed in the porous plate 141. Anaerobic digester for treatment. Digestion tank 100, the cover 120 is installed on the upper part, the annular waterway 130 surrounding the upper wall of the digester 100, the granular pipe 140 is installed in the center of the digester 100, mouth An inlet pipe 111 for supplying the semi-liquid waste to be treated into the boss 140, an annular water channel 130, a cover 120, and a drain pipe 112 and an exhaust pipe 121 installed at a lower end of the digester 100, respectively. In the anaerobic digestion apparatus consisting of a) and the discharge pipe 113, A stirring shaft 210 driven by the driving motor 290 is installed at the center of the digester 100; A lower portion of the digester 100 is provided with a stirring shaft 210 and a concentric running ring 205 along the inner circumferential surface of the digester 100; A horizontal shaft 201 orthogonal to the stirring shaft 210 is installed at the lower end of the stirring shaft 210; The horizontal shaft 201 is rotatably coupled to the hollow shaft 202 having the driving wheel 204 and the plurality of stirring blades 203 formed on the front and outer circumferential surfaces thereof, respectively, such that the stirring shaft 210 rotates to the driving wheel 204. As the idler blade 203 rotates along the traveling ring 205, the stirring blade 203 rotates about the axis of the stirring shaft 210 and also rotates about the axis of the horizontal axis 201. Anaerobic digestive system.

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