JP4149487B2 - Recycling type organic matter drying and water separation treatment method - Google Patents

Description

  The present invention relates to a circulation-type drying / water separation treatment method for evaporating water from organic matter such as livestock manure, sludge, food residues and the like to dry and water them and to use them as an alternative fuel for petroleum.

Since livestock manure contains a large amount of water, it is not usually used as it is, but is used as a fertilizer after treatment to reduce water. For example, a method of adjusting moisture by introducing sawdust into manure (Patent Document 1), or a sewage generated from manure is mixed with high-pressure air and then heated to a high temperature and rotated into a flat disk that rotates at low speed from a spray nozzle. It is known that water is instantaneously evaporated by being sprayed on and taken out as dried residue. (Patent Document 2).
JP 54-117145 A Japanese Utility Model Publication No. 7-9479

  Traditionally, in Japan, livestock manure and other treatments are applied and applied to fields, pastures, etc. by the production of rough compost. Environmental problems due to sewage contamination are a major problem.

  The invention described in Patent Document 1 is a method for adjusting the water content of livestock manure to make it easy to use as a fertilizer, and simply uses waste as it is. In the method described in Patent Document 2, a boiler is used as a high heat source, which not only increases the fuel cost, but also increases the environmental load, is dangerous, and has a long working time. is there.

  The present invention has been made in view of the above-described problems of the prior art, and the processing cost is low, the load on the environment is small, the safety is high, the working time is greatly shortened, and the dried powder after processing. It aims at providing the compact circulation type organic matter drying and water separation processing method which can use a body effectively as a petroleum substitute fuel.

  The above-described problems can be solved by the invention having the following configuration.

(1) Consists of a double-structure mantle that holds hot water for heating and a drying device having a stirring blade inside, a wood-based powder storage silo, a dry organic matter storage silo, a dry organic matter supply device, a boiler, and a hot water circulation device In the recycling type organic matter drying and water separation treatment facility
Organic matter obtained by mixing livestock manure and wood powder in the wood storage silo at a predetermined ratio is supplied to the drying device, and the stirring blade in the drying device heated by hot water is rotated and supplied. The organic matter is stirred and dried, the organic matter dried by the drying device is transferred to a dry organic matter storage silo, the dry organic matter in the dry organic matter storage silo is supplied to the boiler as fuel by the dry organic matter supply device, and the boiler The heating water generated in step 1 is supplied to the drying device by the hot water circulation device as heating hot water, and at the same time, can be supplied to other facilities other than the circulation type organic matter drying / water separation treatment facility. Water separation treatment method.

  (2) The circulation type organic matter drying / water separation treatment method according to (1), wherein a mixing ratio of the woody powder to the livestock manure is 15 to 25% by weight.

  (3) The method according to (1) above, wherein the wood-based powder is a wood-based powder containing a large amount of lignocellulose having a high water retention capacity.

  (4) The organic material drying / water separation treatment method according to (1), wherein a part of the organic matter dried by the drying device is returned to the wood-based powder storage silo and reused.

  Since the present invention is configured as described above, when the organic matter to be dried, such as livestock excreta, sludge, and food residues, is stirred together with the woody powder of the plant substance, the hot water heat and stirring of the dry agitator are performed. The moisture contained in the organic matter adhering to the wood-based powder can be evaporated and dried by the frictional heat generated. For example, dried residual organic matter can be used repeatedly as a substitute for bedding in a barn, and finally used as an alternative fuel for boilers, allowing not only hot water to be supplied to the dryer, but also hot water for washing milking equipment in the barn. Become. Therefore, since it can be reused in places where livestock manure, sludge, food residues, etc. are generated, it has a great effect on reducing the burden on the environment, such as preventing the spread of odors and preventing contamination of sewage. It is inexpensive, highly safe, and has the effect of greatly reducing work time.

  Hereinafter, the best mode for carrying out the circulation type organic matter drying / water separation method according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an outline of a process for drying and circulating organic matter composed of livestock excrement, sludge or food residue and woody powder according to the present invention. The equipment for carrying out the method according to the present invention comprises a drying apparatus having a double-layered mantle holding hot water for heating and a stirring blade inside, a wood-based powder storage silo, a dry organic substance storage silo, a dry organic substance supply apparatus, a boiler, A hot water circulation device is included. Means used for transporting the organic matter between the devices (components) is not particularly limited, and existing transport means such as a belt conveyor, a screw conveyor, pneumatic transport, and an eccentric motor may be appropriately used. Since each component is not special and uses equipment that can be procured from the market, it is possible to construct a processing facility that can be easily automated, is relatively inexpensive, and can be operated safely.

  The method according to the present invention first includes a step of automatically supplying organic matter such as livestock manure to a drying apparatus (step (1)), and lignocellulose made from a residual material of a lumbering step generated in a neighboring area. A process of automatically supplying the wood-based powder stored in the silo by adjusting the supply amount in accordance with its moisture content (process (2)), hot water in the double-layered mantle and friction heat by stirring in the drying device Drying and stirring step by step (step (3)), step of recovering the dried organic matter from the stirring tank of the drying device and transporting it to the dry matter storage silo for temporary storage (step (4)), and drying the organic matter stored in the silo with warm water A process of automatically supplying the boiler quantitatively (process (5)), a process of repeatedly reusing a part of the dried organic matter stored in the silo as a wood-based powder (process (6)), and using the dried organic matter as an alternative fuel for petroleum As small as Hot water supply to other facilities that require high-temperature hot water, such as a step of generating warm water in the llar (step (7)), a step of sending the generated hot water to the drying stirrer (step (8)), and other milking room equipment washing The process (process (9)) to perform is comprised.

  Hereinafter, each step will be described.

  Step (1) shown in FIG. 1 is a step of supplying a predetermined amount of organic matter such as manure, sludge, food residue, etc. of livestock accumulated in the collecting pits to a drying device by a transport vehicle (bucket) or a bucket conveyor. Alternatively, the organic matter may be conveyed to a wood-based powder storage silo and supplied to the drying device together with the wood-based powder by the step (2) described below.

  In step (2), the wood-based powder containing lignocellulose using the remaining material of the lumbering process as a raw material is automatically supplied quantitatively to the drying apparatus by adjusting the input amount according to the moisture content of the organic matter to be dried. It is a process. The water content of cattle manure is about 95%, and adding a woody powder with a water content of 18% to 23% to the manure with a water content of 18% to 23% gives an overall water content of about 80% before drying. Become.

  In the step (3), the organic substance supplied to the drying apparatus and the wooden powder are mixed and stirred. The water absorbed in the wood-based powder by mixing and stirring evaporates (water separation) due to heat generated by the frictional action of the wood-based powder. The drying apparatus used in the drying and stirring step has a double-layered mantle heated with warm water so as to further promote the evaporation of moisture in the mixed organic matter.

  FIG. 2 shows an example of the drying apparatus. 2A is a front view, and FIG. 2B is a side view. In the figure, reference numeral 1 denotes a stirring device body. Reference numeral 2 denotes an agitation tank, and 3 denotes a screw shaft that collects dry organic matter at a discharge port 10 in the center by a centering shaft. 4 is a stirring blade, which stirs the organic matter to be dried, generates frictional heat, and promotes drying. Reference numeral 5 denotes a water level gauge indicating the water level of the warm water for heating in the double-layered outer mantle 6. 6 is a double-layered mantle that holds hot water for heating, and 7 is a thermometer that indicates the temperature of the hot water for heating. 8 is a load cell for measuring the weight of the drying device, and the weight decreases as the water content of the organic matter in the drying device evaporates. Reference numeral 9 denotes an input port for supplying an organic substance to be dried into the stirring tank. Reference numeral 10 denotes a discharge port for the agitated and dried organic matter, which is connected to a dry matter storage silo. Incidentally, the drying apparatus used in the method according to the present invention is not limited to the apparatus shown in FIG.

  Step (4) is a step of transporting a mixture of organic matter and woody powder (target moisture content 25%) dried by a drying apparatus to a dry matter storage silo that temporarily stores the mixture.

  Step (5) is a step of quantitatively supplying the stored dry mixture to the hot water boiler.

  In the step (6), the stored dry mixture (moisture content 20 to 30% by weight) has a moisture absorption effect, so that a part thereof is a woody material storing virgin wood based powder (water content about 20%). This is a step of returning to the system powder silo.

  Step (7) is a step of generating hot water by burning the dry mixture supplied from the dry matter storage silo in a boiler. The mixed dried product is pulverized and easily ignited, and self-combusted only by blowing. Incidentally, the calorific value of the mixed dried product obtained by the method according to the present invention is about 2,000 Kcal / kg, which corresponds to about 1/5 of the calorific value of light oil, heavy oil and the like. Since the boiler used in the present invention is not for generating high-pressure steam, dry organic matter can be used as fuel. For example, when 380 kg of mixed organic matter per hour was dried and used as fuel, 2300 kg of hot water at 100 ° C. per hour could be produced.

  Step (8) is a step of supplying hot water generated by the hot water boiler to the outer shell of the double structure of the drying device.

  Step (9) is a hot water supply step to other facilities / devices that require hot water in addition to the dry stirring device (for example, for washing milking room devices in a ranch).

  In the method described above, a woody powder containing lignocellulose having a low water content (about 20%) is added to organic matter such as manure (initial water content of 90% or more) and mixed and stirred under heating. As a result, the organic matter is dehydrated, and a mixture that can be used as a dried fuel having a moisture content of about 25% can be obtained.

  As described above, according to the present invention, it becomes possible to provide a circulation type drying / water separation plant that can be used as an alternative fuel for petroleum by evaporating water from organic matter such as livestock manure, sludge, and food residues and drying and watering them. . Therefore, by adopting the circulation type plant, not only the operating cost but also the burden on the environment is reduced, so that it can be expected to be used in various fields in the future.

Schematic diagram of the steps of the method for circulating drying / water separation treatment of mixed organic matter of livestock manure, sludge or food residue and wood based powder according to the present invention The figure which shows an example of the drying apparatus used for the circulation type organic substance drying and water separation processing method by this invention, (a) is a front view, (b) is a side view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stirrer body 2 Stirrer tank 3 Centering shaft 4 Stirrer blade 5 Water level meter 6 Double-layered mantle 7 Thermometer 8 Load cell 9 Input port 10 Discharge port

Claims (4)

A circulation type comprising a drying device having a double-layered mantle holding hot water for heating and a stirring blade inside, a wood-based powder storage silo, a dry organic matter storage silo, a dry organic matter supply device, a boiler, and a hot water circulation device In organic matter drying and water separation treatment facilities,
The organic matter obtained by mixing livestock manure and woody powder in the woody powder storage silo at a predetermined ratio is supplied to the drying device, and the stirring blade in the drying device heated by hot water is rotated and supplied. Agitating and drying the organic matter, the organic matter dried by the drying device is transferred to a dry organic matter storage silo, and the dry organic matter in the dry organic matter storage silo is supplied to the boiler as fuel by the dry organic matter supply device; Heated water generated in the boiler is supplied as heated hot water to the drying device by a hot water circulation device and at the same time can be supplied to other facilities other than the circulation type organic matter drying / water separation treatment facility. Drying and water separation treatment method.   The method for drying and separating water from a circulating organic material according to claim 1, wherein the mixing ratio of the wood-based powder to manure of the livestock is 15 to 25% by weight.   The method of drying and separating water from a circulating organic material according to claim 1, wherein the wood-based powder is a wood-based powder containing a large amount of lignocellulose having a high water retention capacity.   2. The recycling type organic matter drying / water separation method according to claim 1, wherein a part of the organic matter dried by the drying device is returned to the wood-based powder storage silo and reused.

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