KR100356146B1 - year-round anaerobic fermentation of organic waste treatment apparatus for methane gas production by heating water source from outside - Google Patents

Abstract

The internal temperature of the organic waste anaerobic fermentation digester, which produces methane gas, is supplied from the outside by using heat storage hot water or solar heating water from midnight power within the optimum fermentation temperature range.

The present invention is formed in a heat storage tank for storing hot water heated by heating means and an digestion tank for anaerobic fermentation of organic waste, and maintains the internal temperature of the digestion tank at an optimum temperature suitable for anaerobic fermentation by hot water supplied from the heat storage tank. Means for heating.

Therefore, the internal temperature of the organic waste anaerobic fermentation digester, which produces methane gas by receiving heat storage power using midnight power or solar heating water from the outside, is automatically adjusted within the optimum temperature range for fermentation. Can supply Optimum heating of anaerobic fermentation digester is possible all year round, so it can be used for low cost cooking and heating. After anaerobic fermentation is completed, fermentation waste can be used as a feed source for livestock and round animals, or organic fertilizer can be used for crop cultivation as organic fertilizer. The automatic adjustment of the optimum temperature of the anaerobic fermentation digester is fully automated, and no additional fuel storage and replenishment are necessary. There is no pollution and the user can be protected from fire, explosion and harmful gas. It is possible to prevent the environmental pollution generated when organic wastes are discharged immediately, and to prevent the discharge of global warming substances generated by neglecting livestock by using anaerobic fermentation of methane gas. It has the advantage of being able to operate eco-friendly treatment equipment of organic waste, which can be water and soil pollution, all year round.

Description

Year-round anaerobic fermentation of organic waste treatment apparatus for methane gas production by heating water source from outside

The present invention relates to an organic waste anaerobic fermentation treatment apparatus for the production of methane gas using the external heating hot water, more specifically, to produce methane gas by receiving the heating water from the outside using heat storage thermal energy or solar heat from the night The present invention relates to an organic waste anaerobic fermentation treatment apparatus for the production of methane gas using the external heating hot water which automatically controls the internal temperature of the organic waste anaerobic fermentation digestion tank within the optimum fermentation temperature range.

Generally, biogas (biogas) that can be used as an energy by anaerobic fermentation of organic wastes such as livestock meal, manure manure, crop residues, farm by-product residue, residues, rapeseed meal, soybean meal, sawdust after mushroom cultivation, and wild grass under high temperature conditions; It is a gas mainly composed of methane gas and carbon dioxide, which can be called 'methane gas' due to its strong combustibility, and after fermentation, water-soluble liquids and residues remain.

In addition, the optimum temperature required for the anaerobic fermentation of organic matter is more than 8 ℃ liquid temperature, then the more anaerobic fermentation proceeds more actively as the temperature increases, the amount of methane gas generated in the optimum temperature range 35 ℃ to 40 ℃ most.

Because of this, the temperature from mid autumn to late spring is much lower than the anaerobic fermentation temperature in Korea, and the organic waste anaerobic fermentation treatment system for methane gas production, which was once spread in rural areas, could not be utilized at low temperatures during the aforementioned period.

As described above, in order to improve the low temperature conditions of the anaerobic fermentation temperature below the anaerobic fermentation temperature due to the low temperature, the following method of warming and warming the anaerobic fermentation digester has been used.

First, a method of heating a fermentation digester by heating compost generated by aerobic fermentation by covering straw with an anaerobic fermentation digester was used.

Second, as a heat insulating material such as styrofoam having a predetermined thickness, a method of heat insulating the surroundings of the fermentation digester in the basement was used.

Third, a method of blocking the low temperature of the winter season by using a fermentation digester in a multi-ply vinyl house was used.

However, the warming and warming method of the anaerobic fermentation tank as described above can be used as an effective method in subtropical and semi-subtropical areas, but as in Korea, the low temperature of winter season in the temperate climate zone is applied as a big obstacle to anaerobic fermentation. Under unfavorable conditions, it was an undesirable method.

In other words, daily average gas generation is 15.2㎥ / day in spring (May-June), 18.7㎥ / day in summer (July-August), 16.4㎥ / day in autumn (September-October), and winter (11 -December) is gradually decreasing toward the low temperature to 13.0㎥ / day.

In other words, the anaerobic fermentation digester in a methane gas production facility used in Korea is active in the anaerobic fermentation of organic waste from the early summer to early autumn, and the methane gas production proceeds smoothly. Under temperature conditions, anaerobic fermentation of organic waste does not proceed properly, which leads to a problem that methane gas is not produced properly.

Therefore, in the meantime, the supply of organic waste anaerobic fermentation treatment apparatus for methane gas production has been a cause of inactivation.

Accordingly, an object of the present invention is to supply methane gas by automatically regulating the internal temperature of an organic waste anaerobic fermentation digester to produce methane gas by receiving regenerative hot water using solar power or heating hot water using solar heat from the outside as an optimum temperature for fermentation. It is to provide an anaerobic fermentation treatment apparatus for organic waste for the production of methane gas for the anniversary using external heated hot water that can supply all year round.

Another object of the present invention is to provide an organic waste anaerobic fermentation treatment apparatus for the anniversary of the production of methane gas using the external heating hot water, which can be utilized for low-cost cooking, cooking for a low cost by the optimal heating of anaerobic fermentation digester all year round will be.

Another object of the present invention is to use the fermentation waste liquid after completion of anaerobic fermentation as a feed source for livestock and cyclic animals, or as an organic fertilizer for the crop cultivation, the anniversary of using the external heating hot water to recycle organic waste usefully It is to provide an anaerobic fermentation treatment apparatus for organic waste for methane gas production.

It is another object of the present invention to provide an organic waste anaerobic fermentation treatment apparatus for the anniversary of the production of methane gas using an external heating hot water, which automatically adjusts the optimum temperature of the anaerobic fermentation digester and requires no additional fuel storage and replenishment. .

It is still another object of the present invention to provide an organic waste anaerobic fermentation treatment apparatus for producing methane gas using the external heated hot water, which is free of pollution and protects users from fire, explosion, harmful gases, and the like.

Another object of the present invention is to prevent the environmental pollution generated when the organic waste is discharged immediately, and to prevent the discharge of global warming substances generated when the nutrients are left as it is collected by using anaerobic fermentation of methane gas. It provides an organic waste anaerobic fermentation treatment device for the production of methane gas for the anniversary using an external heated hot water.

Another object of the present invention is to provide an environmentally friendly apparatus for treating organic waste (for example, stocks, residues, rapeseed, tofu, and wild grasses) discharged from small livestock farms, which may be water and soil pollution sources. It is to provide an anaerobic fermentation treatment system for organic waste for the production of methane gas for the anniversary using external heated hot water that can operate all year round.

1 is a schematic view of a heated hot water means for heating the internal temperature of an organic waste anaerobic fermentation digester in the apparatus according to the present invention to a range of optimum fermentation temperature,

Figure 2 is a schematic diagram showing that the heating hot water means of the anaerobic fermentation digester in the apparatus according to the present invention is installed in the anaerobic fermentation digester,

Figure 3 is a state of use to adjust the optimum temperature of fermentation by the drive of the sensor and the control device for detecting the internal temperature of the anaerobic fermentation digestion tank using the late-night power heat storage hot water in the device according to the present invention,

Figure 4 is a state of use to adjust the fermentation optimum temperature by the drive of the sensor and the control device for detecting the internal temperature of the anaerobic fermentation digester using solar heating hot water in the device according to the present invention.

* Explanation of symbols used in the main part of the drawing

10; Heat storage tank

11; Solar collector

12; Heating coil

13; First sensor

14; 2nd sensor

15,16; Pump

17; Heating pipes

20; Anaerobic Fermentation Digester

40; Temperature control means

The object of the present invention described above is formed in a heat storage tank for storing hot water heated by a heating means and an digestion tank for anaerobic fermentation of organic waste, and suitable for anaerobic fermentation of the internal temperature of the digestion tank by hot water supplied from the heat storage tank. It is achieved by providing an organic waste anaerobic fermentation treatment apparatus for the production of anniversary methane gas using an external heating hot water, characterized in that it comprises a means for maintaining and heating at an optimum temperature.

According to a preferred embodiment, it is to use the heating hot water using solar heat as the heating means.

According to a preferred embodiment, the regenerative hot water using a late night power as the heating means.

According to a preferred embodiment, when using the heating hot water using solar heat as the heating means is formed to utilize the thermal storage hot water using the late-night power when the heat source of the solar heating means according to the climate and weather.

According to a preferred embodiment, when the hot water temperature of the heat storage tank is lower than the set value according to the detection signal input from the first and second sensing sensors and the first and second sensors for sensing the internal temperature of the heat storage tank and the digestion tank The pump is configured to supply hot water heated and supplied to the heat storage tank, and to supply hot water from the heat storage tank to the digestion tank when the internal temperature of the digestion tank is lower than a set value according to a detection signal input from the second detection sensor. And control means for driving.

According to a preferred embodiment, the heating means of the digester is installed inside or outside the digester.

According to a preferred embodiment, the heating means of the digester is formed on the inner surface and the bottom surface of the digester.

According to a preferred embodiment, any one of steel pipe, copper pipe, PVC pipe, duct-shaped iron plate, FRP pipe, casting pipe is used as a heating coil for circulating hot water in the digester to maintain the internal temperature of the digester at a set temperature. Will be.

According to a preferred embodiment, a heating coil used as a heating means for circulating hot water in the digester is installed at intervals of 0.1M to 2M in the digester.

Hereinafter, preferred embodiments of the present invention will be described in accordance with the accompanying drawings, which are intended to be described in detail to be easily carried out by those skilled in the art in order to facilitate the understanding of the technical contents of the present invention. This does not mean that the technical scope of the present invention is limited.

As shown in Figures 1 to 4, the heat storage tank 10 for storing hot water heated by a predetermined heating means, livestock powder, phosphorus manure, crop residues, farm by-product residues, residues, rapeseed watermelon, soybean meal, mushroom cultivation after It is formed in the digestion tank 20 for anaerobic fermentation of organic waste such as sawdust, etc., the internal temperature of the digestion tank 20 suitable for anaerobic fermentation by hot water supplied and circulated from the heat storage tank 10 through the transfer pipe 30 Means for heating at an optimum temperature (35 ° C to 40 ° C) are provided.

At this time, using the heating hot water using solar heat by the endothermic action of the solar heat collecting plate 11 as the above-described heating means, or heat storage using the late-night power by heating the heating coil 12 embedded in the heat storage tank 10 described above. Hot water can be used.

On the other hand, when using the heating hot water using solar heat as the above-described heating means may be formed to utilize the thermal storage hot water using the late-night electricity when the heat source of the solar heating means lacks according to the climate and weather, such as in the winter when the temperature falls to low temperatures. .

When the hot water temperature inside the heat storage tank 10 is lower than the set value according to the first detection sensor 13 for detecting the internal temperature of the heat storage tank 10 and the detection signal input from the first detection sensor 13. By directly heating the heating coil 12 of the heat storage tank 10 described above, or by supplying hot water heated by the endothermic action of the solar heat collecting plate 11 to the heat storage tank 10 through the pump 16, the heat storage tank 10. It is provided with a temperature control means 40 for adjusting the internal temperature of the.

At this time, the above-described temperature control means 40 is the internal temperature of the digester 20 is lower than the set value according to the detection signal input from the second sensor 14 for detecting the internal temperature of the digester 2 described above , And is connected to a pump 15 for supplying hot water stored in the heat storage tank 10 through a transfer pipe 30.

Is formed in the above-described digester 20, the heating means for heating the internal temperature of the digester 20 to the optimum temperature suitable for anaerobic fermentation by hot water supplied from the outside is installed inside or outside the digester 20, At the same time, the above-described heating means may be formed on the inner surface and the bottom surface of the digester 20.

On the other hand, the cross-sectional shape of the digester 20 described above can of course be modified as either circular or polygonal.

At this time, the hot water is circulated inside the digester 20 to maintain the internal temperature of the digester 20 to a set temperature for the steel pipe, copper pipe, PVC pipe, duct (duct) -shaped iron plate, FRP pipe, casting pipe The heating pipe 17 used as a heating tube may be installed at 0.1M to 2M intervals inside the digestion tank 20.

More preferably, the above-described heating pipe 17 is formed at an interval of 0.1M to 0.5M.

Reference numeral 18 denotes a distribution panel having a unit associated with a power supply of the heating coil 12 embedded in the heat storage tank 10, and 19 denotes the use of methane gas produced from the anaerobic fermentation digestion tank 20 for use in cooking, heating, and gas. It's a tank to store.

Hereinafter, a method of using the anaerobic fermentation treatment apparatus for producing organic waste methane gas using the external heating hot water according to the present invention will be described according to the accompanying drawings.

As shown in Figure 3, the organic waste such as livestock waste, phosphorus manure, crop residues, farm by-product residues, residues, rapeseed meal, soybean meal, sawdust after mushroom cultivation, such as wild grasses discharged from the livestock farms without being purified As it is put into the anaerobic fermentation digester 20, it is anaerobic fermented under high temperature conditions in the digester 20 to generate methane gas. At this time, the methane gas produced and discharged inside the digester 20 is stored in the storage tank 19.

The internal temperature of the digester 20 described above is detected by the detection of the second sensor 14 installed inside the digester 20, and the detected signal of the second sensor 14 is the aforementioned temperature control means 40. ) Is entered.

At this time, when the detected internal temperature of the digester 20 is lower than the predetermined temperature, the hot water heated to a predetermined temperature due to the operation of the heating coil 12 built in the heat storage tank 10 described above transfers the pipe 30 Due to the driving of the pump 15 mounted on one side is supplied to the interior of the digester (20).

That is, by discharging to the heating pipe 17 disposed on the inner and bottom surfaces of the digester 20 described above, the internal temperature of the digester 20 is maintained at an optimal temperature (35 ° C. to 40 ° C.) for anaerobic fermentation. You will be able to.

At this time, the hot water temperature of the above-described heat storage tank 10, as the detection signal of the hot water temperature detected by the first sensor 13 installed in the heat storage tank 10 is input to the above-described temperature control means 40, the heat storage tank ( When the hot water temperature of 10) is lower than the predetermined temperature, the driving signal is sent to the above-described distribution panel 18 to switch the power to the ON state, thereby heating the heating coil 12, thereby heating the hot water temperature of the heat storage tank 10. It can be maintained as a predetermined temperature.

On the other hand, Figure 4 is a schematic diagram showing the use of solar heat as a means for heating hot water supplied from the outside as a heating means of the anaerobic fermentation digester according to the present invention.

That is, solar heat is used as a heat source for heating the hot water supplied to the pipe for cooking 17 installed inside or outside the anaerobic fermentation digester 20 described above. When the hot water temperature of the heat storage tank 10 detected by the first detection sensor 13 installed in the heat storage tank 10 is lower than the preset temperature, the hot water heated by the endothermic action of the heat collecting plate 11 is pump 16 ) Is supplied to the heat storage tank 10.

On the other hand, when the hot water temperature inside the heating pipe 17 formed in the digestion tank 20 detected by the second detection sensor 14 installed in the anaerobic fermentation digestion tank 20 described above falls below a predetermined temperature, the above-described heat storage tank As the hot water of 10 is discharged by the driving of the pump 15 and supplied to the heating pipe 17 to circulate, the inside of the digester 20 can be heated to maintain the optimum temperature necessary for anaerobic fermentation. Will be.

As described above, according to a preferred embodiment, the internal temperature of the organic waste anaerobic fermentation digester for producing methane gas by receiving the regenerative hot water using the midnight electricity or the heating water using the solar heat from the outside automatically adjusts to within the optimum temperature range of fermentation As a result, methane gas can be supplied all year round.

In addition, the optimum heating of the anaerobic fermentation digester is possible all year round can be utilized for low-cost cooking, heating.

In addition, after the anaerobic fermentation is completed, the fermentation waste liquid may be used as a feed source for livestock and cyclic animals, or organic waste may be usefully recycled by cultivating crops as organic fertilizers.

In addition, the automatic adjustment of the optimum temperature of the anaerobic fermentation digester, and there is no need for additional fuel storage and replenishment.

In addition, there is no pollution, it can protect the user from fire, explosion, harmful gas and the like.

In addition, it is possible to prevent the environmental pollution generated when the organic waste is discharged immediately, and to prevent the discharge of global warming materials generated when the waste is left untreated by anaerobic fermentation of methane gas.

In addition, it has the advantage that the environment-friendly treatment equipment of organic waste, such as livestock discharged from small livestock farms, which can be a source of water and soil pollution, can be operated all year round.

Claims (9)

delete delete delete delete A heat storage tank for storing the hot water accumulated by the heating coil operated by the late night power; Digestion tank for anaerobic fermentation of organic waste; First and second detection sensors respectively sensing internal temperatures of the heat storage tank and the digestion tank; A pump for pumping hot water of the heat storage tank to the digester; And When the hot water temperature of the heat storage tank is lower than the set temperature by the signal of the first sensor, the heating coil is operated to increase the hot water temperature of the heat storage tank, and the internal temperature of the digester by the signal of the second sensor. A control means for controlling the internal temperature of the digester to be increased by the warm water circulating along the heating means by operating the pump when the temperature is lower than a set temperature, thereby supplying hot water of the heat storage tank to a heating means surrounding the digester. The organic waste anaerobic fermentation treatment apparatus for the production of methane gas using the external heating hot water, characterized in that made. The method of claim 1, The heating means of the digester is an organic waste anaerobic fermentation treatment apparatus for producing anniversary methane gas using external heating hot water, wherein the digester surrounds the digester in a coil shape and circulates the hot water supplied from the heat storage tank along the circumference of the digester. . delete delete delete