JP3756060B2 - Livestock manure processing method and equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a livestock manure treatment method and equipment, and relates to a technique for treating livestock manure in a cold region.
[0002]
[Prior art]
Conventionally, there is methane fermentation as a technique for processing livestock manure discharged from livestock barns. In the treatment process by methane fermentation, livestock manure is solid-liquid separated with a solid-liquid separator such as a roller press or a screw press, and the livestock manure of the liquid phase is put into a fermentor for methane fermentation. In the fermentation process, the fermenter is heated to about 35 ° C. to 55 ° C. in order to increase the activity of the methane bacterium. There is a high-temperature fermentation method to warm. The fermented liquor is sprayed and reduced on farmland as liquid fertilizer, and further purified and released.
[0003]
[Problems to be solved by the invention]
However, in cold regions, manure discharged from the barn during the winter may freeze in the raw material pit. There is a problem that destroys pumps and screens. Moreover, since replacement | exchange and repair of components are needed when an apparatus is damaged, while a trouble and expense generate | occur | produce, a raw material cannot be thrown into a fermenter in the meantime, and becomes a factor which inhibits continuous fermentation. For this reason, livestock farmers must be careful not to freeze manure, and if it is frozen, it must be heated with separate energy to melt the ice mass so that the equipment is not damaged and is necessary for melting. There was a problem of extra energy costs.
[0004]
This invention solves the above-mentioned subject, and it aims at providing the livestock manure processing method and equipment which can thaw | melt the raw material frozen with the heat | fever in a system | strain.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the livestock manure treatment method of the present invention according to claim 1 supplies the raw livestock manure received in the raw material pit to the methane fermentation tank through the solid-liquid separator after heating , and methane fermentation The fermented liquid fermented in the tank is supplied to the liquid fertilizer storage tank through a pipe having a predetermined heat transfer area arranged in the raw material pit by a feed pump, and the raw material in the raw material pit is heated and frozen by the heat of the fermented liquid. It melts the ice block.
[0006]
With the above-described configuration, in order to increase the activity of methane bacteria generally in a methane fermentation tank, the fermentation tank is heated to about 35 ° C. or 55 ° C. by a heat source such as a heater. For this reason, the fermentation liquor at the fermenter outlet has a heat of about 35 ° C. or 55 ° C.
[0007]
For this reason, a predetermined heat transfer area is secured by appropriately setting the diameter and length of the heat radiating pipe line arranged in the raw material pit, and the heat of the fermentation liquid is passed by passing the fermentation liquid through this pipe line. Heat is released to the raw material in the raw material pit through the tube wall, the temperature of the raw material rises to zero degrees or more, and the frozen ice mass melts.
[0008]
Therefore, there is no ice block in the raw material flowing into the solid-liquid separator, and it is possible to supply the raw material stably to the methane fermentation tank by preventing breakage and failure caused by the ice block, and to melt the frozen raw material. By using the heat in the system for the required energy, the generation of extra energy costs can be suppressed.
[0009]
The livestock manure processing facility of the present invention according to claim 2 is a raw material pit for receiving raw material manure, a solid-liquid separator for solid-liquid separation of the raw material, and a raw material after heating the raw material pit to the solid-liquid separator. The supplied mud system, the methane fermentation tank that accepts the liquid phase separated by the solid-liquid separator and conducts methane fermentation, the liquid fertilizer storage tank that stores the fermentation liquid of the methane fermentation tank, and the predetermined transmission arranged in the raw material pit A heat dissipating pipe having a heat area, and a fermented liquor extraction system having a liquid feed pump for supplying the fermented liquor of the methane fermentation tank to the liquid fertilizer storage tank through the heat dissipating pipe of the raw material pit.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a raw material pit 1 receives livestock manure as a raw material, and a heat radiating pipe line 2 having a predetermined heat transfer area is disposed inside. The heat transfer area in the heat radiating pipe 2 is set according to the diameter and length of the pipe.
[0011]
The raw material pit 1 is connected to a solid-liquid separator 5 through a mud feed system 4 having a sludge pump 3 for transferring manure, and the solid-liquid separator 5 comprises a roller press, a screw press, etc. Solid-liquid separation of livestock manure.
[0012]
The solid-liquid separator 5 communicates with the methane fermentation tank 7 through the desorbed liquid discharge system 6 that discharges the separated liquid for the separated liquid phase, and passes through the sludge discharge system 8 for discharging the separated sludge for the solid phase. Connected.
[0013]
The methane fermentation tank 7 performs methane fermentation of the liquid phase of received livestock manure and is provided with heating means (not shown) such as a heater. The methane fermentation tank 7 communicates with the heat radiation pipe 2 of the raw material pit 1 through a fermentation liquid extraction system 10 having a liquid feed pump 9, and the fermentation liquid extraction system 10 passes through the heat radiation pipe 2 to store a liquid fertilizer storage tank 11 that stores the fermentation liquid. Communicating with
[0014]
Hereinafter, the operation of the above-described configuration will be described. The raw material manure received in the raw material pit 1 is supplied to the solid-liquid separator 5 through the mud feeding system 4, and the liquid phase component of the livestock manure separated from the solid and liquid is supplied to the methane fermentation tank 7 through the desorbed liquid discharge system 6. .
[0015]
In general, in order to increase the activity of methane bacteria in the methane fermentation tank 7, the fermentation tank is heated to about 35 ° C. or 55 ° C. by a heat source such as a heater, and methane fermentation is performed. It has a heat of about 35 ° C or 55 ° C.
[0016]
The fermented liquid fermented in the methane fermenter 7 is supplied to the heat radiating pipe 2 by the liquid feed pump 9 through the fermented liquid extraction system 10, and the fermented liquid passed through the heat radiating pipe 2 is stored in the liquid fertilizer storage tank 11. In the raw material pit 1, the heat of the fermented liquid is radiated through the pipe wall of the heat radiating pipe line 2 having a predetermined heat transfer area, so that the raw material in the raw material pit 1 is heated and the temperature of the raw material rises to zero degrees or more and freezes. The ice block melts.
[0017]
【The invention's effect】
As described above, according to the present invention, the fermented liquid at the fermenter outlet is passed through the heat radiating pipe having a predetermined heat transfer area arranged in the raw material pit even if the manure discharged from the barn during the winter in the cold region is frozen. The heat of the fermentation liquor is dissipated to the raw material in the raw material pit through the tube wall, so that the temperature of the raw material can be raised to zero or more and the frozen ice mass can be melted and flows into the solid-liquid separator. Since there is no ice block in the raw material, it can prevent damage and failure due to ice block, can stably supply the raw material to the methane fermentation tank, and uses the heat in the system for the energy required to melt the frozen raw material This can reduce the generation of extra energy costs.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flow sheet diagram showing a livestock manure treatment method and equipment in an embodiment of the present invention.
[Explanation of symbols]
1 Raw Material Pit 2 Heat Dissipation Pipe 3 Sludge Pump 4 Sludge System 5 Solid-Liquid Separator 6 Desorbed Liquid Discharge System 7 Methane Fermentation Tank 8 Sludge Discharge System 9 Feed Pump 10 Fermentation Liquid Extraction System 11 Liquid Fertilizer Storage Tank

Claims (2)

A tube having a predetermined heat transfer area, where the raw material manure received in the raw material pit is heated and supplied to the methane fermentation tank through a solid-liquid separator, and the fermented liquid fermented in the methane fermentation tank is placed in the raw material pit by a liquid feed pump A method for treating livestock manure, which is supplied to a liquid fertilizer storage tank through a path and melts frozen ice blocks of the raw material by heating the raw material in the raw material pit with the heat of the fermentation liquid. The raw material pit that receives the livestock manure of the raw material, the solid-liquid separator that separates the raw material into solid-liquid, the mud feed system that supplies the raw material after heating the raw material pit to the solid-liquid separator, and the solid-liquid separator A methane fermentation tank that accepts the liquid phase and performs methane fermentation, a liquid fertilizer storage tank that stores the fermentation liquid of the methane fermentation tank, a heat radiation pipe that has a predetermined heat transfer area arranged in the raw material pit, and fermentation of the methane fermentation tank A livestock manure processing facility comprising a fermentation liquid extraction system having a liquid feed pump for supplying liquid to a liquid fertilizer storage tank through a heat radiation pipe of a raw material pit.

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