JP2607304Y2 - Drying equipment for hydrous organic matter - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application fields] The present invention relates to, for example, excess sludge, animal dung,
The present invention relates to a drying apparatus for drying water-containing organic substances such as chicken dung, pulp and its residues, food residues, etc. using its own fermentation heat and / or oxidation heat.

[0002]

2. Description of the Related Art Conventionally, raw materials having a relatively high water content, such as sludge and livestock manure, are fermented and dried to form a compost.
With regard to the device to be converted, the applicant has disclosed in
No. 0, JP-A-58-204893, and Jitsuho 2-304
Many proposals such as No. 19 have been made. The technologies according to these proposals have each produced significant effects.

[0003] The above proposal aims at composting fermented and dried raw materials having a relatively high water content, such as sludge and livestock manure. The time required for this composting can be astonishingly short, within 10 hours, under the best conditions. However, the processing time fluctuates due to the unevenness of the water content of the raw materials, and the compost processing accompanying this. The non-uniformity between lots is partly a problem.

[0004] In addition, this rapid composting may not catch up with the rapid increase in the amount of raw materials such as sludge and livestock manure. In this case, the only solution is to increase the size or size of the composting device. on the other hand,
There has also been a demand for responding to a rapid increase in the discharge of raw materials such as sludge and livestock manure by drying the raw materials having a high water content without completely composting the raw materials having a high water content.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a drying apparatus for drying organic matter containing water by using its own fermentation heat and / or oxidation heat.

[0006]

SUMMARY OF THE INVENTION In the drying apparatus for water-containing organic matter according to the present invention, the heat of fermentation and / or oxidation of water-containing organic matter such as excess sludge, animal dung, chicken dung, pulp and its residue, and food residue is reduced. A drier that uses the can body, which can stir and rotate while keeping the organic substance airtight, a heating unit that heats the inside of the can body, and a suction unit that holds the inside of the can body in a reduced pressure state. A water supply means for supplying outside air to the organic matter inside the can body while maintaining the reduced pressure state inside the can body, and a heat exchange means for removing excess heat generated inside the can body, for drying water-containing organic matter. In the apparatus, the can body has a double-walled structure in which a heating medium flows, and the heating unit supplies a heating medium to the inside of the double-walled structure,
The heating of the heat medium includes low-temperature heating for heating the inside of the can body to a temperature at which microorganisms involved in fermentation in the organic matter can survive;
A boiler which can be selected for high-temperature heating for heating the inside of the can body to a high temperature of 00 ° C. or more, wherein the suction means and the air supply means are provided.
Is at least 100 ° C. or higher by the heating means.
When selecting high-temperature heating to heat the inside of the can body to the temperature,
While maintaining the reduced pressure inside the can body, open the outside air inside the can body.
The double-walled structure to which the heat medium is supplied also serves as the heat exchange means.

[0007] Preferably, a device having a deodorizing means connected to the suction means is disclosed.

[0008]

According to the present invention, a can body which can stir and rotate while keeping an organic substance airtight therein, a heating means for heating the can body in the early stage of the drying process, and a suction for keeping the inside of the can body in a reduced pressure state. Means, an air supply means for supplying outside air to the organic matter while maintaining the reduced pressure inside the can body, and a heat exchange means for extracting excess heat generated inside the can body, The organic matter containing
And drying using heat of oxidation.

That is, since air is sent into the organic matter under reduced pressure by the suction means and the suction means, the contained water evaporates well. In addition, in order to generate heat of fermentation by decomposing organic substances of microorganisms involved in fermentation (i.e., fermentation) and heat of oxidation by chemical bonding of organic substances with oxygen (i.e., oxidation) by the heating means, This serves as heat for evaporating the contained water, and the hydrated organic matter can be dried well.

When surplus heat such as fermentation heat or oxidation heat is generated, the heat is removed by heat exchange means.

The heating means preferably includes a low-temperature heating for heating microorganisms involved in fermentation to a viable temperature;
It is possible to select high-temperature heating in which heating is performed to a high temperature of 00 ° C. or more. That is, when heating at a low temperature in the early stage of the drying treatment, the microorganisms involved in the fermentation decompose the water-containing organic matter, generate heat of fermentation, and perform drying and composting.

When heated to 100 ° C. or higher in the early stage of the drying process, oxygen supplied into the organic matter is chemically reacted with the organic matter and bonded (ie, oxidized) by the air supply means, and the heat of oxidation is released to lower the temperature to a low temperature. Drying can be performed in a shorter time than heating.

The organic matter containing water used in the present apparatus is, specifically, an organic matter containing relatively high water content such as excess sludge, animal dung, chicken dung, pulp and its residue, and food residue. If heating is performed, papers with plastic-coated surfaces can be dried.

That is, preferably, papers with plastic coated surfaces are dried with stirring.
Since the plastic coat is separated from the paper and further dried in the form of plastic granules, separation of the dried plastic from the paper is facilitated.

The heating means for heating the can body includes:
Heated boiler (60-90 ° C), steam boiler (100
-160 ° C), heat medium boiler (0-130 ° C, 0-30
0 ° C) , but in the present invention, the double wall structure of the can
The heating medium is supplied to the part and the heating of the heating medium is
Inside the can at a temperature at which microorganisms involved in fermentation can survive
Heating the inside of the can body to low temperature heating and heating to over 100 ° C
As a boiler that can be selected for high-temperature heating
Preferably, a heating medium boiler is used.

This is because it is difficult for the heat boiler to raise the temperature in the can to 100 ° C. or more during high-temperature heating, and in the steam boiler, when the excess heat due to fermentation heat and oxidation heat is used effectively, another Since a heat exchange means is required, a heat medium boiler is preferably used. Thus , high-temperature heating can be easily performed, and the excess heat can be used as a heat medium of a heat exchange unit when the heat is effectively used.

Further, the deodorizing means connected to the suction means includes:
Deodorizes odors in exhaust air using physical and chemical deodorization methods. Preferably, lava rock deodorization and soil deodorization are used. Lava stone deodorization refers to filling a deodorization tower with lava stone, spraying water on the deodorization tower, and propagating bacteria on the surface of the lava stone and in pores to deaerate. The lava deodorization tower passes exhaust and aeration from the lower part of the tower and discharges it at the upper part. Lava rock has a large number of pores formed therein, and the pores of the lava contain odor. Lava stones can be used permanently.

[0018] Soil deodorization refers to burying a pipe having a number of exhaust ports formed in the soil and decomposing the exhaust gas discharged from the exhaust port by bacteria in the soil.

[0019]

FIG. 1 is an explanatory view showing the structure of an embodiment of a drying apparatus for a water-containing organic substance of the present invention. As shown in the figure, there is a can body (2) for keeping the organic matter supplied from the charging hopper (1) airtight. This can (2) consists of a motor (3) and a gear (4)
(4 '), and is rotatably provided on a guide roll (5) provided at the lower portion of the side surface of the can (2).

The side wall of the can (2) has a double structure,
Inside the double structure, a heating medium boiler (heating means) (6), which heats the can (2) at the beginning of the drying process, passes through a rotary joint (7) of one rotating shaft of the can to heat the heating medium. Is circulated by the circulation pump (8).

The other rotary shaft has a suction pump (suction means) (10) communicating with a suction port (9) fixed at an upper position inside the can (2), and a suction pump (10) inside the can (2). An air supply nozzle (air supply means) (11) for supplying the outside air to the organic matter fixed at a lower position inside the can (2) while maintaining the reduced pressure state is provided. Also, the pipe (12) communicating with the suction pump (10) and the air supply nozzle (1
With the pipe (13) communicating with 1), heat is exchanged by the heat exchanger (14) on the way, and the heat inside the can (2) is given to the air entering from the outside, and the heat is used effectively .

This drying device is a can body having a structure that can be sealed.
Into (2), water-containing organic matter is charged, and the water-containing organic matter is heated in the initial stage of the drying process while being stirred by rotating the can (2), and is further internally sucked by a suction pump to facilitate diffusion of water. Air and steam are removed by suction to reduce the internal air pressure, and heat exchanged with the exhaust air to heat the heated air,
While the inside of the can is maintained at a constant negative pressure, suction is performed so as to spray the raw material.

In this drying apparatus, 60 ° C.
When heated at a low temperature, microorganisms involved in fermentation decompose organic matter containing water, and in the latter half of the drying process, produce fermentation heat of about 90 ° C. to perform drying and composting. When heated to 100 ° C. or higher in the early stage of the drying process, oxygen supplied into the organic substance is chemically reacted with the organic substance to form a bond (oxidation) by an air supply unit.
Then, in the latter half of the drying treatment, heat of oxidation of about 200 ° C. is released, and drying can be performed.

Therefore, in the drying apparatus of the present embodiment, the excess heat generated by the heat generation of the water-containing organic substance in the latter half of the drying process is transferred to the heating medium boiler (6) communicated with the side wall of the can (2).
, And sent to another facility as a heat carrier. Alternatively, it may be performed by a heat exchanger (14) connected to the suction pump (10). Therefore, thermal efficiency savings <br/> amount and evaporation of water used fuel is extremely high.

Thermal efficiency is usually 45 to 75% with direct hot air,
Drying is performed at a thermal efficiency of 30 to 55% by heating the erofin heater. The thermal efficiency of this drying device is 140% for pig dung and 15 for chicken dung.
It has a remarkable thermal efficiency of 0%, cow dung 130%, mandarin peel 150%, coffee grounds 160%, papermaking sludge 160%, excess sludge 120%, and 144% on average.

Since the exhaust gas discharged from the suction pump (10) often has an odor, it is preferable that the exhaust gas is discharged after being deodorized by a deodorizing tower (deodorizing means) (15).
Lava stone deodorization is used as the deodorization tower (15). Lava stone deodorization means that a deodorization tower (15) is filled with lava stone, exhausted and aerated from the lower part of the tower, and discharged at the upper part of the tower.

A large number of pores are formed in the lava rock filled therein, and the pores of the lava rock contain the odor. Lava stones can be used permanently. The deodorization tower (15) is provided with a chemical injection pump (16) and an aeration pump (17).

As described above, the present drying apparatus has a wide range of uses such as drying, sterilization, sterilization, and fermentation of food and industrial residues. In addition, it is possible to dry up to high moisture (90% or more) and low moisture without moisture adjustment (excess sludge and animal dung). This apparatus can be selected from low-temperature drying (60 ° C.) to high-temperature drying (200 ° C.). In addition, the device can be used for a wide range of applications including fermentation and sterilization, sterilization, and drying, and helps promote recycling.

[0029]

According to the present invention, as described above , a can body capable of stirring and rotating the organic substance therein in an airtight manner,
A heating means for heating the body portion, and suction means for holding the inside of the can body in a reduced pressure state, and the air supply means for supplying outside air while maintaining the vacuum state of the can body part in organic matter of the can body part, The can body is provided with heat exchange means for extracting surplus heat generated therein, and the can body is provided with a heat medium flowing therethrough.
A wall structure, wherein the heating means is provided inside the double wall structure;
And heating the heating medium with the organic substance.
Inside the can at a temperature at which microorganisms involved in fermentation can survive
Heating the inside of the can body to low temperature heating and heating to over 100 ° C
Heating to high temperature heating and equipped with selectable boiler, before
The double wall structure to which the heat medium is supplied also serves as the heat exchange means.
Since those are the organic matter containing water, it can be dried by utilizing its heat of fermentation and / or oxidation heat.

That is, since air is sent into the organic matter under reduced pressure by the suction means and the suction means, not only the contained water evaporates well, but also the organic matter of microorganisms involved in fermentation from the beginning by the heating means. Heat of fermentation due to decomposition (fermentation) and chemical bonding of organic matter with oxygen (oxidation)
As a result, heat is generated for evaporating the water contained therein, and the water-containing organic matter can be dried well.

When surplus heat such as fermentation heat or oxidation heat is generated, the heat is removed by heat exchange means.

The heating means preferably comprises a low-temperature heating for heating microorganisms involved in fermentation to a viable temperature, and
It is possible to select high-temperature heating in which heating is performed to a high temperature of 00 ° C. or more. That is, when heating at a low temperature in the early stage of the drying treatment, the microorganisms involved in the fermentation decompose the water-containing organic matter, and generate the heat of fermentation for drying and composting.

When heated to 100 ° C. or higher in the early stage of the drying process, oxygen supplied into the organic matter is chemically reacted with the organic matter and combined (oxidized) by the air supply means, and the heat is released by oxidizing heat to perform drying. And the like.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of an embodiment of a drying apparatus for a water-containing organic substance of the present invention.

[Explanation of symbols]

 (1) ... input hopper, (2) ... can body, (3) ... electric motor, (4) (4 ') ... gear, (5) ... guide roll, (6) ... heat medium boiler (heating means), ( 7) Rotary joint, (8) Circulation pump, (9) Suction port, (10) Suction pump (suction means), (11) Air supply nozzle (air supply means), (12) Piping, (13)… Piping, (14)… Heat exchanger, (15)… Deodorization tower (deodorizing means),

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 11/00-11/20 C05F 1/00-17/00 B09B 3/00-5/00 F26B 1 / 00-25/22

Claims (2)

(57) [Scope of request for utility model registration] 1. A dryer utilizing the heat of fermentation and / or the heat of oxidation of organic matter containing water such as excess sludge, animal dung, chicken dung, pulp and its residue, food residue, etc., in which the organic matter is kept airtight. A stirring and rotating can body, a heating means for heating the inside of the can body, a suction means for maintaining the inside of the can body in a reduced pressure state, and the outside air while maintaining the reduced pressure state inside the can body. In a drying apparatus for a water-containing organic substance, comprising: an air supply means for supplying organic matter inside the can body; and a heat exchange means for extracting excess heat generated inside the can body, wherein the can body has a heat medium flowing therein. The heating means supplies a heat medium to the inside of the double wall structure, and heats the heat medium to a temperature at which microorganisms involved in fermentation in the organic matter can survive. Low temperature heating to heat the inside of the body and high temperature of 100 ° C or more Comprising a selectable boiler and high temperature heating for heating the can body, the suction means and the air supply means, at least the heating means
High temperature that heats the inside of the can body to 100 ° C or higher
When selecting heating, maintain the reduced pressure inside the can body
A drying apparatus for a water-containing organic matter , wherein outside air is supplied to the organic matter inside the can body while the double-wall structure to which the heat medium is supplied also serves as the heat exchange means. 2. The apparatus for drying a water-containing organic matter according to claim 1, further comprising a deodorizing means connected to the suction means.