KR102440944B1 - Hybrid type digester apparatus - Google Patents

Abstract

The present invention relates to a hybrid anaerobic digester. The hybrid anaerobic digester, according to the present invention, comprises: a digester body (10); a stirring device (102); a first pump device (104) and a second pump device (106); and a bypass device (112). According to the present invention, gaseous gas and liquid slurry inside a digester body can be completely mixed, and thus, discharged gas can be reused to greatly improve efficiency.

Description

Hybrid type anaerobic digester {HYBRID TYPE DIGESTER APPARATUS}

The present invention relates to a hybrid-type anaerobic digester, and more particularly, by uniformly distributing the concentration of the digestion filtrate in the hybrid-type anaerobic digester and preventing the generation of sediment accumulated inside the digester, thereby improving the stabilization function and containing in the organic waste It relates to a hybrid-type anaerobic digester capable of stably generating biogas such as methane by uniformly contacting complex organic matter and enzyme microorganisms.

In general, anaerobic digestion refers to the decomposition of organic wastewater into methane and carbon dioxide by the decomposition of anaerobic microorganisms by putting various organic wastewater such as food waste eliminator and manure in a closed tank. In other words, it can be said that biogas (methane) is produced through biological treatment of high-concentration waste and wastewater containing a large amount of organic matter such as organic waste, livestock manure, sewage sludge, and high-concentration leachate under anaerobic conditions without oxygen.

For this process, the tank receiving the organic wastewater is called an anaerobic digester.

As time passes after the installation of the anaerobic digester, inorganic deposits such as calcareous, bone powder, and fiber continue to accumulate therein and gradually solidify from the bottom of the digester to the upper part, thus occupying the space inside the digester, thereby reducing the processing capacity of the digester. .

And as time passes, the deposited sediment is often deposited toward the bottom of the digester, so it usually blocks the external outlet that is installed at the bottom of the digester, thereby interfering with the normal operation of the digester.

In this respect, mixing inside the anaerobic digester is very important. The conventional anaerobic digester mixing method can be classified into three types. There is a mechanical stirring method, which is installed and stirred, and a pump stirring method using a pump.

First, the non-powered gas stirring method by gas pressure is currently installed and used in most anaerobic digesters of sewage treatment plants, but there is a problem that the mixing efficiency is not appropriate, and as a long time after installation, sediments continue to accumulate inside the digester floor As the layers are gradually stacked from the lower part to the upper part, the dead zone increases, reducing the space required for mixing, and causes short-circuiting, which leads to overload due to lack of volume.

As a result, there is a high possibility that a temperature layer in which the upper and lower temperatures are different from each other due to the short circuit phenomenon occurs, and ultimately causes an overload by anaerobic microorganisms, leading to operation failure.

As such, mixing is one of the most important design factors for maintaining optimum conditions of temperature and microorganisms, that is, optimum conditions of a high-rate anaerobic digestion reactor.

In addition, the mechanical stirring method in which a stirrer is directly installed and stirred is a method to stir by installing an impeller inside with a motor outside. There is a very high risk of structural problems caused by biogas, and there is a limit that requires a lot of attention because there is a risk of explosion due to the nature of biogas.

In addition, the agitation method by the pump is likely to be affected by the solid material inside the digester, and in this case, the mixing efficiency by the pump may also decrease.

In particular, when the solid material exceeds a certain concentration, the mixing characteristics are different from that of water or wastewater, so the flow path is formed by the pump rather than mixing by the pump, and a plug flow type flow occurs, resulting in a layer of concentration inside the digester. there was

To this end, it was necessary to maintain a constant concentration inside the digester, thereby properly mixing the concentration of organic matter inside the digester, maintaining the temperature difference between the upper and lower parts of the digester to a minimum, and maintaining a constant concentration of solids in the upper and lower parts of the digester. do.

Since the concentration of the solid material is an important part in determining the volume of the anaerobic digester and controlling the entire system, proper mixing inside the digester allows the organic material to be delivered and contacted with the anaerobic microorganism cell wall, and the function of separating the generated biogas from the cell wall and to maintain a constant temperature so that a temperature difference between the upper and lower parts of the digester does not occur.

On the other hand, the temperature inside the anaerobic digester may cause an increase in the growth rate of microorganisms according to the increase in temperature.

The rapid growth of microorganisms generates a large amount of sludge, but since it is possible to supply appropriate microorganisms to the anaerobic digester for stable operation, the maintenance of an appropriate temperature inside the digester is a factor that enables the efficiency of energy conversion to be constantly maintained.

In this regard, the development of a digester capable of maintaining a constant concentration of solid substances in the anaerobic digester and allowing the mixture to be properly mixed while maintaining the temperature difference between the upper part and the lower part of the digester to a minimum is desired.

As such, the reaction for stabilization of organic matter and gas (methane) generation in the anaerobic digester is governed by the hydrolysis rate of complex organic matter, and the decomposition of organic matter by microorganisms is easily decomposed by extracellular enzymes suitable for waste and wastewater to be treated. Hydrolysis to a small molecular substance occurs and this hydrolase is produced only by a sufficient amount of bacteria and does not limit the overall stabilization reaction, but in order to efficiently proceed with hydrolysis, the enzyme and microorganism must be actively contacted with organic matter.

In order for the organic material to be uniformly mixed with microorganisms and to grow in the reaction tank, the temperature and PH conditions of the reaction tank are required.

As a result, the intermediate product generated through the hydrolysis and acid fermentation steps is used as a substrate (food) for methanogenic microorganisms to produce methane. Because it can be generated, the importance of stirring is very important.

Korean Patent Registration No. 10-0709333 (Registered on Dec. 2007) Korean Patent Registration No. 10-0493209 (Registered on May 25, 2005)

The present invention has been devised to solve the above problems, and it is to provide a hybrid type anaerobic digester that can greatly improve the efficiency by using a mixture of a gas stirring method, a pump stirring method, and a mechanical stirring method. for that purpose

The present invention is a hybrid type anaerobic digester that can solve the problems of the pump-type stirring method by utilizing the mechanical stirring method using an impeller to overcome the disadvantages of the pump-type stirring that is operated intermittently to prevent the deposition of organic matter and microorganisms Its purpose is to provide

The present invention improves efficiency by connecting a pipe to the lower part of the anaerobic digester, inducing mixing and circulation of the upper and lower parts using a pump, and increasing the flow rate by forming the diameter of the pipe injected into the upper part into a small diameter, and LCFA (Long An object of the present invention is to provide a hybrid anaerobic digester that can break a fatty ring such as chain fatty acid).

The present invention is installed to re-introduce biogas generated through anaerobic digestion by connecting the pipe to circulate the gas with the inflow of gas, thereby reducing the density of organic matter in the form of a ring and increasing the efficiency of smooth contact with microorganisms. It aims to provide a hybrid anaerobic digester for reducing the occurrence of scum and the like.

The present invention can be used as a removal device for installing an ultrasonic vibrator in a pump pipe to stimulate microorganisms to activate microorganisms and to remove sturuvite (stones) generated in a horizontal pipe, and to increase the contact time between microorganisms and organic matter It is an object of the present invention to provide a hybrid anaerobic digester for reducing power costs.

The present invention is not limited to the above purpose and other objects not mentioned may be provided within a range that can be clearly understood by those of ordinary skill in the art to which the present invention belongs.

The present invention comprises: a digester body 10 installed to store organic waste and to generate biogas by decomposing it using microorganisms; a stirring device 102 installed in the central portion of the digester body 10 and agitating the organic waste using an impeller 18 composed of a plurality of blades inside the digester body 10; By installing pumps 20 and 40 on the outside of the digester body 10 to circulate the liquid slurry of organic waste stirred in the digester body 10 through the pump line pipes 22 and 42, the digester a first pumping device 104 and a second pumping device 106 in which pump line pipes 22 and 42 are installed to supply the slurry into the body 10; Slurry is supplied using the first pumping device 104 and the second pumping device 106 and bypass lines 34 and 54 are installed at the upper end of the digester body 10 in the digester body 10 . It characterized in that it comprises a bypass device 112 for rapidly supplying and mixing the gas and liquid slurry by recycling the biogas generated in the.

The first pump device 104,

a pump 20 installed outside the digester body 10; a pump line pipe 22 connected horizontally to one side of the pump 20; a supply line pipe 24 extending vertically from the pump line pipe 22; a bent part line pipe 26 extending from the supply line pipe 24 and being rounded and bent in one direction; The bent section line pipe 26 is extended and inserted into the digester body 10 and is formed to be inclined at a predetermined angle A through the slurry supplied through the pump 20 and the bypass device 112 . It is preferable that the supplied gas is mixed and composed of an inclined part line pipe 27 for spraying.

The bypass device 112,

a bypass line 54 in the shape of a giyeok character (a) installed on the outer side of the upper portion of the digester body 10; a control valve 56 installed in the middle of the bypass line 54 to control the amount and speed of gas; The lower end of the bypass line 54 is connected to the point where the bent line pipe 46 and the inclined line pipe 48 meet, so that an orifice 58 is formed, so that the gaseous gas and the liquid slurry are separated. It is preferable that the digester body 10 be installed so that it can be rapidly sprayed into the interior.

A plurality of upper and lower vibrators are installed in the upper and lower portions of the pump line pipes 22 and 42 of the first pump device 104 and the second pump device 106 to activate microorganisms using ultrasonic vibration and pump It is desirable to remove the stones and deposits in the line pipes (22,42) and the supply line pipes (24,44).

As such, the present invention has excellent agitation effect due to gas activity in the digester, and complete mixing of gaseous gas and liquid slurry inside the digester body is possible, greatly improving efficiency by reusing the discharged gas and It has the effect of breaking aliphatic rings such as LCFA (long chain fatty acid).

And, the present invention has an effect of obtaining a stirring effect with excellent efficiency with a small rotational force by stirring using an impeller in the digester, and prevents sedimentation by pumping scum and organic wastes into the digester and at the same time prevents deposition of the slurry It greatly improves the contact with microorganisms by improving the mixing ratio, and it can be digested quickly, which has the effect of greatly reducing the maintenance cost.

In addition, the present invention has the effect of checking the state in the anaerobic digester by alternately using the mechanical, gas, and pump types, stirring and digestion, so maintenance is very convenient, and the stirring efficiency and digestibility are excellently improved.

1 is a perspective view showing the structure of a hybrid anaerobic digester of the present invention;
Figure 2 is a cross-sectional view of Figure 1
3 is a partially enlarged view showing a bypass structure in which the biogas of the present invention is re-introduced

The following objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and that the spirit of the present invention may be sufficiently conveyed to those skilled in the art.

The embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase. As used herein, an element referred to as 'comprise' and/or 'comprising' does not exclude the presence or addition of one or more other elements.

In addition, in describing the configurations described as embodiments below, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is for clarification without obscuring the gist of the present invention by omitting unnecessary description.

Hereinafter, specific examples according to the hybrid anaerobic digester of the present invention will be described.

1 is a perspective view showing the structure of the hybrid anaerobic digester of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a partially enlarged view showing the bypass structure in which the biogas of the present invention is re-introduced.

The hybrid anaerobic digester of the present invention will be described with reference to FIGS. 1 to 3, first, as shown in FIG. 1, the hybrid anaerobic digester 100 of the present invention is a stirring device 102 and a first It includes a pump device 104 , a second pump device 106 , a third pump device 108 , a pumping unit 110 , and a bypass device 112 .

The stirring device 102 rotates the impeller 18 using the motor 14 and contains a large amount of organic matter such as food waste (including food waste water), livestock manure, sewage sludge, and high-concentration leachate inside the anaerobic digester 100. Organic wastes such as high-concentration wastes and wastewater are mixed and stirred through a mechanical method together with biological treatment using microorganisms under anaerobic conditions without oxygen.

The first pumping device 104 is installed at the lower left side of the anaerobic digester 100 and circulation of gaseous gas and liquid fine slurries is made by the first pumping device 104 .

The second pumping device 106 is installed on the lower right side of the anaerobic digester 100 and is installed symmetrically with the first pumping device 104 .

The first pumping device 104 and the second pumping device 106 stimulate the microorganisms in the anaerobic digester 100 while suctioning and circulating the organic waste to activate and elevate the microorganisms, thereby increasing the efficiency of smooth contact with the microorganisms. installed to do

And, the third pump device 108 is installed on one side vertically from the top to the bottom of the anaerobic digester 100, and a stirring device 102 is installed in the center of the anaerobic digester 100 from the top to the bottom. It is installed to supply organic waste into the anaerobic digester 100 .

A pumping unit 110 for activating organic waste on the inner side of the anaerobic digester 100 by the first pumping device 104 and the second pumping device 106 at the bottom of the center inside the anaerobic digester 100 ) is installed.

Next, a bypass device 112 is installed at upper ends of the first pumping device 104 and the second pumping device 106 , respectively.

The bypass device 112 partially recovers biogas (methane) generated inside the anaerobic digester 100 and re-introduces it into the first pump device 104 and the second pump device 106 for use. .

More specifically, referring to FIG. 2 , the hybrid anaerobic digester 100 has a cylindrical digester body 10 formed, and a plurality of baffles in the longitudinal direction on the inner surface of the digester body 10 . 12 is formed, and a stirring device 102 is installed in the central portion of the digester body 10 from the top to the bottom.

The stirring device 102 is provided with a motor 14 as a power source in the upper central portion, a rotating shaft 16 is installed in a vertical downward direction at the lower portion of the motor 14, and an impeller ( 18) is installed.

A plurality of through-holes 19 are formed in the impeller 18, and the through-holes 19 are circular, oval, It can be variously formed in a polygonal shape such as a triangle, a quadrangle, a pentagon, and is formed by selecting any one of them.

A first pumping device 104 and a second pumping device 106 are installed in the digester body 10 to circulate organic waste, and the first pumping device 104 is located at the lower end of the digester body 10 . The pump 20 is installed and the pump 20 has a pump line pipe 22 installed horizontally in the left direction, and a supply line pipe 24 extending in the pump line pipe 22 and rising upward. Connected and installed, the upper end of the supply line pipe 24 is bent in the right direction to form a bent line pipe 26, and the right end of the bent line pipe 26 is bent at a predetermined angle A), and the digester The inclined portion line pipe 27 is formed by extending into the body 10 .

The inclined portion line pipe 27 is formed to extend into the inside of the digester body 10 to be submerged in organic waste, and the organic waste stirred by the pump 20 is circulated through the pipe.

An initial vibrator 28 is attached to the pump line pipe 22, and the initial vibrator 28 is stirred in the digester body 10 to give vibration to the sucked organic waste so that the organic waste flows smoothly. and at the same time provide vibration so that stones do not occur in the pump line tube 22 .

An upper vibrator 30 is installed at the upper left end of the horizontally installed pump line pipe 22, and a lower vibrator 32 is installed at the lower left end, and the upper vibrator 30 and the lower vibrator 32 are installed. is installed in the upper and lower portions, and by installing in a zigzag manner, smooth the flow of organic waste passing through the pump line pipe 22 .

And, the upper end of the supply line pipe 24 is bent roundly in one direction, preferably in the direction of the digester body 10 to form a bent line pipe 26, and the right end of the bent line pipe 26 is long. It extends to form an inclined portion line pipe 27 , and the inclined portion line tube 27 is introduced into the digester body 10 and installed.

At this time, the inclined portion line pipe 27 is bent at a predetermined angle (A) with the inner wall of the digester body (10) to be inclined toward the inner center of the digester body (10), and the predetermined angle (A) is 20 degrees to It is preferable to form an inclined bending in the range of 60 degrees. Because, when the predetermined angle (A) is less than 20 degrees, when the organic waste flowing into the pumps 20 and 40 is put into the digester body 10, it does not spread sufficiently over a wide range and deposits in the digester body 10 This is accumulated as a dead zone and the stirring efficiency is lowered, and on the contrary, when the predetermined angle (A) is wider than 60 degrees, the organic waste is injected close to the water surface and close to the impeller 18 of the stirring device 102. This is because the stirring is not performed smoothly and the stirring efficiency is lowered.

In the upper part of the pump line pipe 22 installed as described above, vibration is generated using ultrasonic waves to smooth the flow of organic waste passing through the pump line pipe 22, and to the inside of the pipe body of the pump line pipe 22 An initial vibrator 28 is installed to shake off organic wastes so that they do not adhere or to activate microorganisms and to separate organic wastes that have been attached to the inside of the conduit to separate them.

On one side of the initial vibrator 28, as shown in FIG. 2, on the left side, a plurality of vibrators are installed on the upper part of the pump line tube 22. The upper vibrators 30 are fixed at regular intervals, The lower vibrator 32 is fixed to the lower part of the pump line tube 22 while forming a zigzag displaced from the upper vibrator 30 at the lower part of the upper vibrator 30 .

A control valve 29 is installed in the pump line pipe 22 between the initial vibrator 28 and the upper and lower vibrators to control the amount and speed of organic waste supplied through the pump line pipe 22 .

Subsequently, a bypass device 112 is installed in the bent line tube 26 , and the bypass device 112 has a bypass line 34 in the shape of an inverse reversing element, and the bypass line 34 has A control valve 36 is installed.

An orifice portion 38 is formed in the bypass line 34 , and the orifice portion 38 is formed at a point where the bent portion line tube 26 ends and the upper end of the inclined portion line tube 27 meet.

The orifice portion 38 is made in the form of a venturi tube and is pulled up by the pump 20 and at the same time is forcibly introduced into the digester body 100 to provide organic waste quickly, thereby forming a ring shape with the inflow of gas. The band reduces the density of organic matter, thereby increasing the efficiency of smooth contact with microorganisms and preventing the occurrence of scum.

That is, by increasing the diameter of the bent section line pipe 26 and reducing the diameter of the inclined section line pipe 27, the flow rate is increased and the pressure is lowered and negative pressure is generated, so that the gas contains a high concentration of suspended material. It is mixed with the liquid slurry and injected into the digester body 10 at high speed.

At this time, bubbles are generated due to the cavitation phenomenon and the biogas production efficiency is increased by increasing the contact efficiency of microorganisms by breaking the fatty ring of organic waste.

On the other hand, the upper end of the bypass line 34 of the bypass device 112 is bent in the right direction and installed to extend into the digester body 10 , and bio such as methane generated inside the digester body 10 . It is installed in a circulation structure in which gases are re-introduced into the bypass line 34 and introduced into the digester body 10 again through the orifice part 38 .

A control valve 36 is installed in the middle of the bypass line 34 and the orifice part 38 to control the amount and speed of re-introduced biogas.

Subsequently, in the second pump device 106 installed in the lower part of the digester body 10 , a pump 40 is installed outside the lower part of the digester body 10 , and a pump line pipe 42 is installed in the pump 40 . It is installed horizontally in the right direction, and a supply line pipe 44 extending upwardly extending to the pump line pipe 42 is connected and installed, and the upper end of the supply line pipe 44 is bent in the left direction. A bent line pipe 46 is formed, and the left end of the bent line pipe 46 is bent at a predetermined angle (A) and extends into the digester body 10 to form an inclined line pipe 48 . .

The inclined part line pipe 48 is formed to extend into the inside of the digester body 10 to be immersed in organic waste, agitated by the stirring device 102, and the organic waste activated by microorganisms by the pump 40 circulated through the conduit.

An upper vibrator 50 is installed on the upper right side of the pump line pipe 42, a lower vibrator 52 is installed on the lower right side, and the upper vibrator 50 and the lower vibrator 52 are connected to the upper part and the lower part. By installing each in a zigzag at the lower part, the flow of organic waste passing through the pump line pipe 42 is smooth.

And, the upper end of the supply line pipe 44 is bent roundly in one direction, preferably in the direction of the digester body 10 to form a bent line pipe 46, and the left end of the bent line pipe 46 is long. The inclined portion line pipe 48 is formed by extending, and the inclined portion line tube 48 is introduced into the digester body 10 and installed.

At this time, the inclined portion line pipe 48 is bent at a predetermined angle (A) with the inner wall of the digester body 10 to be inclined toward the inner center of the digester body 10, and the predetermined angle (A) is 20 degrees It is preferable to form an inclined bending in the range of 60 degrees. Because when the predetermined angle (A) is less than 20 degrees, when the organic waste flowing in through the pump 40 is put into the digester body 10, it does not spread sufficiently in a wide range, and the sediment of the digester body 10 is The agitation efficiency is lowered by being piled up in the dead zone of the lower outer wall of the digester body, and on the contrary, when the predetermined angle (A) is wider than 60 degrees, the organic waste is sprayed close to the water surface of the agitation device 102 and the impeller of the agitator 102 This is because the stirring does not come close to (18) and the stirring efficiency is lowered.

In the upper part of the pump line pipe 42 installed as described above, vibration is generated using ultrasonic waves to smooth the flow of organic waste passing through the pump line pipe 42, and to the inside of the pipe body of the pump line pipe 42. A plurality of upper and lower vibrators 50 and 52 are installed to shake off organic wastes so that they do not adhere or to activate microorganisms and at the same time to separate organic wastes that have been attached to the inside of the conduit to separate the crystallized organic wastes.

On one side of the upper and lower vibrators 50 and 52, as shown in FIG. 2, on the right side, a plurality of vibrators are installed on the upper part of the pump line tube 42. The upper vibrators 50 are spaced at regular intervals. The lower oscillators 52 are fixed to the lower part of the pump line tube 42 while forming a zigzag displaced from the upper oscillators 50 at the lower part of the upper oscillators 50 .

A control valve 72 is installed in the pump line pipe 42 between the upper and lower vibrators to control the amount and speed of organic waste supplied through the pump line pipe 42 .

Subsequently, a bypass device 112 is installed in the bent line tube 46 , and the bypass device 112 has a bypass line 54 in the shape of an inverse reversing element, and the bypass line 54 has A control valve 56 is installed.

An orifice portion 58 is formed in the bypass line 54 , and the orifice portion 58 is formed at a point where the bent portion line tube 56 ends and the upper end of the inclined portion line tube 48 meet.

The orifice portion 58 is made in the form of a venturi tube and is pulled up by the pump 40 and at the same time is forcibly introduced into the digester body 10 to provide organic waste quickly, thereby forming a ring shape with the inflow of gas. By reducing the density of organic matter, the band can increase the efficiency of smooth contact with microorganisms and prevent the occurrence of scum.

That is, by making the diameter of the bent line pipe 46 larger and the diameter of the inclined line pipe 48 smaller, the flow rate is increased and the pressure is lowered and a negative pressure is generated so that the gas contains a high concentration of suspended material. It is mixed with the liquid slurry and injected into the digester body 10 at high speed.

At this time, bubbles are generated due to the cavitation phenomenon and the biogas production efficiency is increased by increasing the contact efficiency of microorganisms by breaking the fatty ring of organic waste.

On the other hand, the upper end of the bypass line 44 of the bypass device 112 is bent in the right direction and installed to extend into the digester body 10 , and bio such as methane generated inside the digester body 10 . It is installed in a circulation structure in which gases are re-introduced into the bypass line 44 and introduced into the digester body 10 again through the orifice part 48 .

A control valve 56 is installed in the middle of the bypass line 44 and the orifice part 48 to control the amount and speed of re-introduced biogas.

Each vertical suction part 60 is installed in the upper direction of the pumps 20 and 40 installed as described above, and the vertical suction part 60 extends into the digester body 10 and the digester body 10 ) at the upper end of the vertical suction unit 60 extending to the inside, each horizontal suction unit 62 is formed in the horizontal direction.

The organic waste activated by microorganisms and stirred by the stirring device 102 is introduced through the horizontal suction unit 62 installed as described above, and through the pumps 20 and 40, each of the pump line pipes 22 and 42 It rises through the circulatory system.

In addition, a gas discharge pipe 64 is installed vertically on the upper right side of the digester body 10 , and biogas such as methane generated in the digester body 10 is discharged through the gas discharge pipe 64 .

A control valve 66 is installed in the gas discharge pipe 64 , and the gas is discharged by the control valve 66 and the amount and speed of the discharged gas can be adjusted.

On the other hand, an upper pump 68 is installed in the upper left side of the digester body 10, an upper pump supply line pipe 70 is installed in the upper pump 68, and the upper pump supply line pipe 70 is adjusted A valve 72 is installed.

Organic waste is supplied through the upper pump 68 .

The upper pump supply line 70 is installed vertically and supplies organic waste to the vicinity of the impeller 18 of the stirring device inside the digester body 10 .

Organic waste is stirred in the digester body 10 by the stirring device 102 and pumps 20 and 40 and microorganisms installed in the digester body 10 as described above, and recirculated by the pumps 20 and 40, It is possible to operate a hybrid anaerobic digester that can be continuously activated by microorganisms and can compensate for the disadvantages of pump-type stirring and mechanical stirring by recycling to the bypass device 112 .

At this time, by operating the hybrid anaerobic digester of the present invention, mechanical agitation using the stirring device 102 is made and the stirred organic waste is circulated through the first pump device 104 and the second pump device 106, and the biogas Efficiency can be greatly improved by recirculating using and stirring.

This hybrid type anaerobic digester 100 can lead to maximum efficiency by intermittently sequentially operating so as to induce contact time between microorganisms and organic waste and to reduce power costs.

In other words, variable operation is possible by performing the operation for 10 to 20 minutes or by operating it in units of 1 hour. The stirring operation is performed using the stirring device 102, and the organic wastes which are first stirred are activated using the first and second pump devices and microorganisms to produce biogas. ) are used to circulate.

At the same time, by operating the biopass device 112 to reuse the gas generated in the digester body 10, the working efficiency and production efficiency are greatly increased by 2-3 times or more.

The operation method of the hybrid anaerobic digester 100 can select a stirring device and a pump device according to the amount, size, and time of the anaerobic waste input, which can be operated in various ways, but as an example of that, first, stirring using the pump devices 10 After performing for about 15 minutes to 15 minutes, the stirring operation of the pumping devices is stopped for about 10 to 15 minutes to be activated using microorganisms, and the stirring device 102 is operated for about 20 to 25 minutes to stir, and then again to the stirring device 102 1 cycle can be performed by repeating the operation of stopping for about 10 to 15 minutes and reactivating using microorganisms.

3 is a view showing the structure of an orifice using a venturi tube of the present invention. A supply line pipe 44 having a thick diameter is installed on the right side of the digester body 10, and the upper part of the supply line pipe 44 is round. A bent line pipe 46 bent into a shape is formed, and an inclined line pipe 48 is formed to extend into the digester body 10 in the left direction of the bent line pipe 46 .

At this time, an orifice portion 58 is formed at a point where the inclined portion line tube 48 and the bent portion line tube 46 meet.

That is, the inclined portion line tube 48 having a smaller diameter than the diameter of the supply line tube 44 and the bent portion line tube 46 is connected and installed to make the tube narrower.

In the orifice part 58 installed in this way, the slurry supplied along the supply line pipe 44 is supplied at a high pressure, and as it passes through the orifice part 58, the flow speed increases and the pressure decreases, It is to be rapidly injected into the digester body (10).

In the supply line pipe 44 and the bent line pipe 46, they are strongly mixed in a liquid state and gasified according to high-speed injection while passing through the orifice 58. Mixing is possible.

In addition, when the predetermined inclination angle (A) is less than 20 degrees, the inclined section line pipe 48 has an excellent liquid and gas mixing rate and can be supplied at a high speed due to gasification, but it is difficult to bend and the bent section line pipe 46 ), there is a risk of vibration and damage due to large stress (stress) in the The feed flow becomes slow and gentle, which reduces the mixing rate of liquid and gas.

In the case of the hybrid anaerobic digester 100 as described above, when the mechanical stirring device 100 is used, the contact time between organic waste and microorganisms is increased through low-speed operation to increase biogas, and the bypass device 112 It is possible to increase the efficiency by circulating the gas generated inside the digester body 10 using the By supplying the gasified gas into the digester body 10, it has excellent workability.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be variously implemented by those of ordinary skill in the art to which the present invention belongs, and within this range Technical changes will be said to be within the scope of the present invention.

10: digester body 12: baffle
14: stirring motor 16: stirring shaft
18: impeller 20, 40: pump
22,42: pump line pipe 24,44: supply line pipe
26,46: bent line tube 28: initial vibrator
30,50: upper vibrator 32,52: lower vibrator
34,54: bypass line pipe 36,56: control valve
38,58: orifice part 60: vertical suction part
62: horizontal suction unit 64: gas discharge pipe
66: control valve 68: upper pump
70: upper pump supply line pipe 72: control valve
100: anaerobic digester
102: stirring device 104: first pumping device
106: second pumping device 108: third pumping device
110: pumping unit 112: bypass device

Claims (4)

a digester body 10 that stores organic waste and is installed to generate biogas by decomposing it using microorganisms;
a stirring device 102 installed in the central portion of the digester body 10 and agitating the organic waste using an impeller 18 composed of a plurality of blades inside the digester body 10;
By installing pumps 20 and 40 on the outside of the digester body 10 to circulate the liquid slurry of organic waste stirred in the digester body 10 through the pump line pipes 22 and 42, the digester a first pumping device 104 and a second pumping device 106 in which pump line pipes 22 and 42 are installed to supply the slurry into the body 10;
Slurry is supplied using the first pumping device 104 and the second pumping device 106 and bypass lines 34 and 54 are installed at the upper end of the digester body 10 in the digester body 10 . A bypass device 112 for rapidly supplying and mixing gas and liquid slurry by recirculating the biogas generated in the
The first pump device 104,
a pump 20 installed outside the digester body 10;
a pump line pipe 22 connected horizontally to one side of the pump 20;
a supply line pipe 24 extending vertically from the pump line pipe 22;
a bent part line pipe 26 extending from the supply line pipe 24 and being rounded and bent in one direction;
The bent section line pipe 26 is extended and inserted into the digester body 10 and is formed to be inclined at a predetermined angle A through the slurry supplied through the pump 20 and the bypass device 112 . It consists of an inclined part line pipe 27 for mixing and injecting the supplied gas,
The bypass device 112,
a bypass line 54 in the shape of a giyeok character (a) installed on the outer side of the upper portion of the digester body 10;
a control valve 56 installed in the middle of the bypass line 54 to control the amount and speed of gas;
The lower end of the bypass line 54 is connected to the point where the bent line pipe 46 and the inclined line pipe 48 meet, so that an orifice 58 is formed so that gaseous gas and liquid slurry are transferred to the digester. Installed so that it can be quickly sprayed into the body 10,
A plurality of upper and lower vibrators are installed in the upper and lower portions of the pump line pipes 22 and 42 of the first pump device 104 and the second pump device 106 to activate microorganisms using ultrasonic vibrations and pump line Remove stones and deposits in the pipes (22,42) and supply line pipes (24,44),
The upper end of the bypass line 34 of the bypass device 112 is bent in the right direction to extend into the digester body 10, and biogas such as methane generated inside the digester body 10 is It is installed in a circulation structure that is re-introduced into the bypass line 34 and flows back into the digester body 10 through the orifice 58,
A control valve 36 is installed in the middle of the bypass line 34 and the orifice 58 to control the amount and speed of re-introduced biogas,
The second pump device 106 installed in the lower part of the digester body 10 has a pump 40 installed outside the lower part of the digester body 10, and a pump line pipe 42 is installed in the pump 40 in the right direction. is installed horizontally to the pump line pipe 42 and is connected to a supply line pipe 44 that extends upward and rises upward, and the upper end of the supply line pipe 44 is bent in the left direction and bent to the left. (46) is formed and the left end of the bent line pipe (46) is bent at a predetermined angle (A) and extends into the digester body (10) to form an inclined section line pipe (48),
The inclined line pipe (27, 48) is formed to extend into the inside of the digester body (10) to be immersed in organic waste, agitated by the stirring device (102), and the organic waste activated by microorganisms is the pump (40) circulated through the pipeline by
The stirring device 102,
A motor 14 as a power source is installed in the upper center, a rotating shaft 16 is installed in a vertical downward direction under the motor 14, and a plurality of through-holes 19 are formed at the lower end of the rotating shaft 16 The impeller (18) is installed,
The inclined part line pipe (27, 48) is,
The inner wall of the digester body 10 is bent at a predetermined angle (A) to be inclined toward the inner center of the digester body 10, and the predetermined angle (A) is bent to be inclined at 50 degrees,
The inclined part line pipe 27 is formed to extend into the inside of the digester body 10 to be submerged in organic waste, and the organic waste stirred by the pump 20 is circulated through the pipe line,
An initial oscillator 28 is attached and installed between the pump 20 and the control valve 72 in the pump line pipe 22,
A control valve 29 is installed in the pump line pipe 22 between the initial vibrator 28 and the upper and lower vibrators to control the amount and speed of organic waste supplied through the pump line pipe 22,
A bypass device 112 is installed in the bent line pipe 26, the bypass device 112 has a bypass line 34 in the shape of an inverse reversing element, and the bypass line 34 has a control valve ( 36) is installed,
An orifice part 38 is formed in the bypass line 34, and the orifice part 38 is formed at a point where the bent part line pipe 26 ends and the upper end of the inclined part line pipe 27 meets,
The orifice part 38 is made in the form of a venturi tube, and provides organic waste to the inside of the digester body 100 by the pump 20. Hybrid-type anaerobic digester, characterized in that it is installed to increase the contact efficiency of and to prevent the occurrence of scum.

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