WO2024010124A1

WO2024010124A1 - Livestock waste fermentation heat recovery system

Info

Publication number: WO2024010124A1
Application number: PCT/KR2022/009957
Authority: WO
Inventors: 강건민; 이상로; 박광우; 양철주; 문홍석
Original assignee: 주식회사 더블유피; 순천대학교 산학협력단
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2024-01-11

Abstract

The present invention relates to a livestock waste fermentation heat recovery system which heats water by using fermentation heat generated during livestock waste fermentation by using aerobic microorganisms, so that a barn can be washed and drinking water supplied to livestock in winter can be heated. The system comprises: a livestock waste storage tank (100) installed in a fermentation facility that is isolated from the outside; a pair of guide bars (111) which are installed in the longitudinal direction on both sides of the upper surface of the livestock waste storage tank; a moving frame (140) having moving wheels rotatably installed on both sides thereof, in which the moving wheels rotate while in contact with the guide bars; a moving motor which is installed on one side of the upper surface of the moving frame (140) to rotate the moving wheels; an agitating motor (150) which is installed on the other side of the upper surface of the moving frame; an agitating wheel (160) which is installed in the livestock waste storage tank so as to be rotated by the agitating motor, and has a plurality of agitating wings installed on the outer circumferential surface thereof; a moving-up/down frame (170) installed so that a plurality of heat exchange pipes through which the water heated by the fermentation heat generated from the livestock waste stored in the livestock waste storage tank is circulated are installed to be exposed through the bottom surface thereof; and a moving-up/down motor (200) which rotates a winding wheel so as to move up or down the moving-up/down frame.

Description

Livestock fermentation heat recovery system

The present invention relates to a livestock manure fermentation heat recovery system, and more specifically, to heating water using the fermentation heat generated during livestock manure fermentation using aerobic microorganisms, which not only cleans livestock sheds but also heats drinking water supplied to livestock in winter. It is about a livestock manure fermentation heat recovery system that can be used.

In general, livestock waste generated in livestock farms (pig houses, chicken houses, cattle sheds, etc.) where livestock are raised is causing soil and water pollution problems due to improper management.

According to research data from the Korea Rural Economic Institute, the nitrogen balance (input surplus) of the soil area caused by chemical fertilizers and livestock manure in Korea is 238 kg/ha, the highest level among OECD countries, and the nutrient balance excess ratio is 90.6% for nitrogen and phosphoric acid. It is estimated to reach 125.1%, and Gari 85.7%.

Recognizing the seriousness of soil and water pollution caused by inappropriate management of livestock waste, all livestock manure is converted into compost/liquid fertilizer to resolve environmental problems caused by livestock waste and increase management efficiency, and promote the use of compost/liquid fertilizer. Possible measures are being developed.

However, as the use of livestock manure as a resource has reached its limits due to the rapid expansion of livestock operations, worsening management of livestock farmers, and aging population, most of the livestock manure is abandoned or dumped without permission, rapidly emerging as a serious cause of groundwater pollution, soil, and marine pollution. Therefore, there is an urgent need to establish a recycling policy for livestock by-products.

In addition, livestock farms place many thermal water supply devices for livestock outdoors or in livestock barns to provide drinking water to livestock or use it as washing water to wash livestock barns. In seasons such as winter when the air temperature is low, the water supplied to livestock drinking water tanks In order to prevent this from becoming too full or freezing, the water and washing water in the drinking water tank was heated with a boiler or electric heater, resulting in increased electricity and fuel consumption, which resulted in economic difficulties as the costs required for livestock operation increased.

The present invention was invented to solve the above-mentioned problems, and its purpose is to recover and recycle the fermentation heat generated when fermenting livestock manure generated in livestock housing (pig housing, chicken housing, cattle housing, etc.) using aerobic microorganisms, making it environmentally friendly. By rationally responding to livestock management guidelines, difficulties faced by livestock farms can be resolved. At the same time, complaints regarding the difficulty in disposing of manure due to insufficient farmland (seasonal conditions) and odor caused by neglect can be resolved. What was once considered a resource can be turned into a resource, and it can be used as a means of keeping the drinking water supplied to livestock warm, preventing it from getting cold or freezing in the winter. At the same time, it can be used to heat the washing water used to wash livestock sheds to keep the drinking water and washing water warm. We provide a livestock manure fermentation heat recovery system that can reduce the costs required for livestock operation by reducing energy consumption of electricity or fuel by eliminating the use of electric heaters or boilers.

The livestock waste fermentation heat recovery system according to the present invention for achieving the above technical problem is installed inside the fermentation plant 100, which is blocked from the outside, and stored, and has at least two devices to measure the temperature of the fermentation heat according to the height of the stored livestock waste. A livestock manure storage tank (110) in which a plurality of fermentation heat sensors (120) are installed; A pair of guide bars 111 installed in the longitudinal direction on both sides of the upper surface of the livestock manure storage tank 110; A moving frame 140 on which moving wheels 130, which rotate in contact with the guide bar 111, are rotatably installed on both sides; A moving motor 131 installed on one side of the upper surface of the moving frame 140 to rotate the moving wheel 130; A stirring motor 150 installed on the other upper surface of the moving frame 140; A stirring wheel (160) installed inside the axle manure storage tank (110) to be rotated by the stirring motor (150) and having a plurality of stirring blades (161) installed on the outer circumferential surface; A plurality of heat exchange pipes 171 through which water heated by fermentation heat generated from livestock waste stored in the livestock manure storage tank 110 circulates are installed exposed to the bottom, and the heat exchange pipes 171 are installed to be arranged in the horizontal direction. Elevating frame 170; A lifting motor 200 that rotates the winding wheel 201 to raise or lower the lifting frame 170; An odor filter 210 installed on the wall 101 of the fermentation plant 100 to prevent odor generated inside the fermentation plant 100 from being generated to the outside; And, a water storage tank 190 installed at the end of the heat exchange pipe 171 built into the lifting frame 170, and a circulation installed in the heat exchange pipe 171 to circulate the water stored in the water storage tank 190. Includes pump 191.

In this way, the present invention not only heats the water circulating in the heat exchange pipe by the fermentation heat generated when the livestock waste stored in the livestock waste storage tank is fermented by aerobic microorganisms, but also agitates the livestock waste stored in the livestock waste storage tank, thereby fermenting the livestock waste. This has the unique effect of reducing the costs required for livestock farming by reducing the consumption of electricity or fuel by eliminating the use of electric heaters or boilers previously used to keep drinking water warm and to heat washing water.

In addition, it has the unique effect of effectively utilizing renewable energy by recovering heat generated from livestock waste and minimizing environmental pollution by purifying odors generated during livestock waste fermentation.

Figure 1 is a perspective view showing a system according to the present invention.

Figure 2 is a cross-sectional view showing the system according to the present invention.

Figure 3 is a cross-sectional view showing a state in which fermentation heat is recovered by the system according to the present invention.

Figure 4 is a bottom perspective view showing the arrangement of heat exchange pipes according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

Prior to describing the present invention, the following specific structural and functional descriptions are merely illustrative for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms. It should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments will be illustrated in the drawings and described in detail in the specification.

Figure 1 is a perspective view showing a system according to the present invention, Figure 2 is a cross-sectional view showing the system according to the present invention, Figure 3 is a cross-sectional view showing a state in which fermentation heat is recovered by the system according to the present invention, and Figure 4 is a This is a bottom perspective view showing the arrangement of the heat exchange pipe according to the invention.

As referred to herein, the present invention is provided with a fermentation facility 100 made up of a wall 101 and a roof 102 to be blocked from the outside, and an entrance door 103 is installed on one or both sides of the wall 101. there is.

Inside the fermentation plant 100, a livestock waste storage tank 110 is installed to store livestock waste (A), and a pair of guide bars 111 are installed on both sides of the upper surface of the livestock waste storage tank 110 in the longitudinal direction. In addition, at least two or more fermentation heat sensors 120 are installed to measure the temperature of fermentation heat according to the height of the livestock manure stored in the livestock manure storage tank 110.

A pair of moving wheels 130 are rotatably installed on the upper surface of the guide bar 111 in a contact state, and the moving wheels 130 are installed at both ends of the moving frame 140.

In addition, a moving motor 131 is installed on one upper surface of the moving frame 140 to transmit rotational force to one of the pair of moving wheels 130, and the moving frame 140 A stirring motor 150 is installed on the other side of the upper surface.

One end of a stirring chain 151 is installed on the stirring motor 150, and a stirring wheel 160 installed inside the axle manure storage tank 110 is installed on the other end of the stirring chain 151, and the stirring wheel 160 is installed on the stirring motor 150. A plurality of stirring blades 161 are installed on the outer peripheral surface of (160) to stir the livestock waste.

Meanwhile, a lifting frame 170 is installed on the upper part of the livestock manure storage tank 110 to be able to be raised and lowered, and on the bottom of the lifting frame 170, a plurality of heat exchange pipes through which water heated by fermentation heat generated from the livestock waste circulates. (171) is installed exposed.

A water storage tank 190 for storing water and a circulation pump 191 for circulating water are installed at the end of the heat exchange pipe 171.

In addition, a plurality of temperature sensors 180 are installed to measure the temperature of the water storage tank 190 heated by fermentation heat and the temperature of the bottom edge of the lifting frame 170.

The lower end of the wire 202 is installed on the upper surface of the lifting frame 170, and the upper end of the wire 202 is wound around the winding wheel 201 rotated by the lifting motor 200. By rotating 200 in the forward or reverse direction, the lifting frame 170 moves up and down.

Meanwhile, an odor filter 210 is installed on the wall 101 of the fermentation plant 100 to prevent odor generated when livestock waste is fermented by aerobic microorganisms from being generated to the outside.

*The present invention configured as described above will be described in detail as follows.

First, by storing livestock waste in the livestock waste storage tank 110 through the door 103 of the fermentation plant 100 and then closing the door 103, the temperature of the fermentation plant 100 is prevented from being lowered by the external temperature. It is to prevent.

The livestock waste (A) stored in the livestock waste storage tank 110 is fermented by aerobic microorganisms, and the odor generated when the livestock waste (A) is fermented is generated by the odor filter 210 installed on the wall 101 of the fermentation plant 100. Since it is removed and discharged to the outside, it prevents the surrounding environment from being polluted due to bad odor.

On the other hand, when the temperature detected by the plurality of fermentation heat sensors 120 installed in the livestock manure storage tank 110 is within the set range (fermentation heat recovery possible temperature), the lifting motor 200 is operated so that the wire 202 wound around the winding wheel 201 is unwound. is operated in the forward direction, and the lifting frame 170 to which the lower end of the wire 202 is connected moves downward. That is, the heat exchange pipe 171 exposed on the bottom of the lifting frame 170 is inserted into the livestock waste A stored in the livestock manure storage tank 110.

Therefore, the water inside the heat exchange pipe 171 is heated by the fermentation heat generated from the livestock manure (A), and at this time, the circulation pump 191 is operated to continuously circulate the water inside the water storage tank 190. heating water.

When heat is exchanged in this way, if the temperature value detected by the temperature sensor 180 installed on the bottom edge of the water storage tank 190 and the lifting frame 170 is lower than the set range (temperature at which water can be heated), Since fermentation heat is not generated, the lifting motor 200 is operated in the reverse direction to move the lifting frame 170 upward.

At this time, when the moving motor 131 and the stirring motor 150 are operated to stir the livestock manure (A), the stirring blade 161 installed on the stirring wheel 160 rotates to stir the livestock manure stored in the livestock manure storage tank 110. Since the moving wheel 130 rotated by the moving motor 131 is rotated while being guided by the guide bar 111, the moving frame 140 and the stirring blade 161 are moved in the longitudinal direction of the livestock manure storage tank 110. As it moves, livestock waste and microorganisms are agitated.

Therefore, the water is heated using the fermentation heat of the livestock waste (A) while repeating the above-described process.

As such, the present invention recovers the heat generated from livestock manure, utilizes renewable energy, purifies the odor generated during fermentation of livestock manure, and uses the heat of fermentation to keep drinking water warm for livestock and heat washing water, using an electric heater or boiler. Since this is not done, the cost required for livestock operation can be reduced by reducing power or fuel consumption.

The present invention is installed in a farm's livestock shed, etc., and heats water using the fermentation heat generated during fermentation of livestock manure. It relates to a system that not only cleans the livestock shed, but also heats drinking water supplied to livestock in winter, and has industrial applicability. There is.

Claims

A livestock waste storage tank 110 installed inside the fermentation plant 100, which is blocked from the outside, to store livestock waste, and at least two or more fermentation heat sensors 120 are installed to measure the temperature of the heat of fermentation according to the height of the stored livestock waste. ;

A pair of guide bars 111 installed in the longitudinal direction on both sides of the upper surface of the livestock manure storage tank 110;

A moving frame 140 on which moving wheels 130, which rotate in contact with the guide bar 111, are rotatably installed on both sides;

A moving motor 131 installed on one side of the upper surface of the moving frame 140 to rotate the moving wheel 130;

A stirring motor 150 installed on the other upper surface of the moving frame 140;

A stirring wheel (160) installed inside the axle manure storage tank (110) to be rotated by the stirring motor (150) and having a plurality of stirring blades (161) installed on the outer circumferential surface;

A plurality of heat exchange pipes 171 through which water heated by fermentation heat generated from livestock waste stored in the livestock manure storage tank 110 circulates are installed exposed to the bottom, and the heat exchange pipes 171 are installed to be arranged in the horizontal direction. Elevating frame 170;

A lifting motor 200 that rotates the winding wheel 201 to raise or lower the lifting frame 170;

An odor filter 210 installed on the wall 101 of the fermentation plant 100 to prevent odor generated inside the fermentation plant 100 from being generated to the outside; and, ,

A water storage tank 190 installed at the end of the heat exchange pipe 171 built into the lifting frame 170, and a circulation pump installed on the heat exchange pipe 171 to circulate the water stored in the water storage tank 190 ( 191) A livestock waste fermentation heat recovery system comprising:
In claim 1,

A livestock waste fermentation heat recovery system, characterized in that a plurality of temperature sensors 180 are installed to measure the internal temperature of the water storage tank 190 and the temperature of the bottom edge of the lifting frame 170.