JP2004330092A - Drying carbonizing processing method and drying carbonizing processing apparatus for moisture-containing waste treatment object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save resources and to promote no environmental-pollution by forming carbonized substance and ash by disposing a circulation system of generated steam between a hot air furnace having steam pipes and a combustion chamber, and a multi-stage type drying carbonizing furnace to circulate a heat source in a closed system. <P>SOLUTION: Chicken droppings, cattle droppings and other moisture-containing waste (treatment object material) are received at an upper stage of the drying carbonizing furnace 1, drying carbonizing treatment is proceeded, and while sequentially transferring to lower stages, generated steam is taken out of an intermediate stage and separately introduced to the steam pipe 21 of the hot air furnace 2 and the combustion chamber 22 via a dust collector 3, the reheated high temperature steam by passing through the steam pipe 21 is returned to upper and lower stages of the drying carbonizing furnace 1 serving as a new heat source, and the surplus generated steam introduced into the combustion chamber 22 is deodorized. A part of dried matter intermediately formed in the drying and carbonizing processing is taken out of the furnace and supplied to the hot air furnace to be used as a secondary fuel to be ashed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Technical field to which the present invention pertains]
The present invention relates to a method and apparatus for dry carbonization of poultry manure, livestock manure and other water-containing waste products (same as raw materials to be treated) and, more particularly, to a hot stove provided with a steam pipe and a combustion chamber. A method for drying and carbonizing water-containing waste products in which a circulating system of generated steam is arranged between a multistage dry carbonizing furnace and a heat source is circulated in a closed system to generate carbides and ash. It relates to a carbonization device.
[0002]
[Prior art]
BACKGROUND ART Conventionally, an externally heated dry carbonization furnace or an incinerator for drying and carbonizing chicken dung, livestock dung, and other water-containing waste products (the same as raw materials to be processed) has been known. There has also been a proposal for combining a dry carbonization furnace and an incinerator and using combustion exhaust gas from the incinerator as a heat source for the dry carbonization furnace. (See, for example, Patent Documents 1, 2, and 3.)
[0003]
[Patent Document 1]
JP-A-5-164314 (FIG. 1)
[Patent Document 2]
JP-A-6-159635 (FIG. 1)
[Patent Document 3]
JP-A-2002-356319 (FIG. 1)
[0004]
Patent Documents 1 and 2 are in-house technologies of the present applicant. (Hereinafter, the prior application device.)
[0005]
Patent Literature 3 discloses an externally heated rotary kiln, in which steam is introduced in the final step of carbonization to activate the carbide. (Hereinafter, the conventional device.)
[0006]
[Problems to be solved by the invention]
However, there is room for improvement in the form of heat utilization in the prior application.
[0007]
Further, the conventional apparatus is intended to activate the carbide in a porous manner, and does not utilize the steam generated in the dry carbonization process.
[0008]
Under these circumstances, the present inventor has developed a system for generating carbides and incineration while circulating a drying heat source in a closed system in order to contribute to further resource saving and pollution reduction (environmental protection). It has been done.
[0009]
The present invention has been made in view of such circumstances, and solves the above-mentioned problems, and arranges a circulation system for generated steam or steam between a hot blast stove and a multi-stage dry carbonization furnace to provide a closed system. The present invention provides a dry carbonization method and a dry carbonization apparatus for a water-containing waste product, which generates carbides and ash while circulating a heat source.
[0010]
[Means for Solving the Problems]
In order to solve the problem, the present invention arranges a circulation system of generated steam between a hot stove having a steam pipe and a combustion chamber and a multi-stage dry carbonization furnace to circulate a heat source in a closed system. A method of dry carbonizing a water-containing waste product (same as a raw material to be processed), which is configured to produce a carbide and an ash,
The raw material to be treated is received in the upper stage of the dry carbonization furnace, the dry carbonization process proceeds while being sequentially transferred to the lower stage, the generated steam is taken out from the middle stage, and branched into the steam pipe and the combustion chamber of the hot stove through the dust collector. Then, the high-temperature steam reheated by passing through the steam pipe is returned to the upper and lower stages of the drying carbonization furnace, respectively, and is used as a new drying heat source, and excess generated steam introduced into the combustion chamber is deodorized. Is what you do.
[0011]
A dry carbonization treatment device for performing the dry carbonization treatment method,
A circulating system for generated steam is provided between a hot air stove having a steam pipe and a combustion chamber and a multi-stage dry carbonization furnace, and the material to be treated is received in the upper stage of the dry carbonization furnace, and sequentially transferred to the lower stage. The dry carbonization process proceeds while taking out the generated steam from the middle stage, branching into the steam pipe and the combustion chamber of the hot blast stove through the dust collector, passing the steam pipe and reheating the high-temperature steam into the dry carbonization furnace. A drying heat source circulating mechanism is provided in each of the upper and lower stages to provide a new drying heat source, and a carbide and an ash are produced while circulating the heat source in a closed system.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0013]
As shown in the flow sheet of the apparatus (X) of the present invention in FIG. 1, a circulation system a, b of generated steam is provided between a hot blast stove 2 having a steam pipe 21 and a combustion chamber 22 and a multi-stage dry carbonization furnace 1. And an air preheater 4 (cooling tower) is provided in the hot blast stove 2.
[0014]
The raw material to be treated is received in the upper stage of the dry carbonization furnace 1 and the dry carbonization process proceeds while sequentially transferring the raw materials to the lower stage. The steam (about 180 ° C.) generated in the process of the dry carbonization process is taken out from the middle stage, and the cyclone is removed. The high-temperature steam (450 ° C. or higher) which is branched and introduced into the steam pipe 21 and the combustion chamber 22 of the hot blast furnace 2 through the dust collector 3 (steam circulation system a) and passed through the steam pipe 21 and reheated to the dry carbonization furnace 1 The water is returned to the upper and lower stages, respectively, to be used as a new drying heat source (steam circulation system b). (Dry heat source circulation mechanism)
[0015]
On the other hand, surplus generated steam introduced into the combustion chamber 22 is deodorized, introduced into the air preheater 4 together with the combustion exhaust gas to exchange heat, and the preheated outside air is sent to the combustion chamber 22 (exhaust heat recovery line c). The generated steam whose temperature has been reduced is released to the atmosphere via the bag filter 5 (ventilation means). (Exhaust heat recovery mechanism)
[0016]
In addition, a conveyor 6 (secondary fuel supply means) for taking out a part of the dried product intermediately produced from the dry carbonization furnace 1 to the outside of the furnace and supplying it to the hot blast furnace 2 is provided. In addition, compost may be separately added as a secondary fuel in addition to the dried product.
[0017]
Then, the carbide is recovered from the dry carbonization furnace 1 and the ash is recovered from the hot blast furnace 2.
[0018]
【The invention's effect】
The present invention has the above-described configuration. According to this, since it has a drying heat source circulation mechanism and a waste heat recovery mechanism, it is possible to further promote resource saving and pollution reduction. In addition, since the secondary available carbide and ash can be simultaneously recovered as resources, the industrial utility value is great.
[Brief description of the drawings]
FIG. 1 is a flow sheet of the apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dry carbonization furnace 2 Hot stove 21 Steam pipe 22 Combustion chamber 3 Cyclone dust collector 4 Air preheater (cooling tower)
5 Bag filter (ventilation means)
6 Conveyors (secondary fuel supply means)
a Steam circulation system (outbound)
b Steam circulation system (return)
c Exhaust heat recovery line X Dry carbonization treatment device [this device]

Claims (5)

In the method of dry carbonization of chicken dung, livestock dung and other water-containing waste products (same as raw materials to be processed),
A circulating system for generated steam was installed between a hot blast stove equipped with a steam pipe and a combustion chamber, and a multi-stage dry carbonizing furnace to generate carbides and ash while circulating a heat source in a closed system. A method for dry carbonization of water-containing waste products,
The raw material to be treated is received in the upper stage of the dry carbonization furnace, the dry carbonization process proceeds while being sequentially transferred to the lower stage, the generated steam is taken out from the middle stage, and branched into the steam pipe and the combustion chamber of the hot stove through the dust collector. Then, the high-temperature steam reheated by passing through the steam pipe is returned to the upper and lower stages of the drying carbonization furnace, respectively, and is used as a new drying heat source, and excess generated steam introduced into the combustion chamber is deodorized. Method for dry carbonization of water-containing waste products. 2. The method of claim 1, wherein a part of the dried product produced in the course of the dry carbonization process is taken out of the furnace, supplied to a hot blast stove, used as a secondary fuel, and incinerated. In the dry carbonization equipment for poultry manure, livestock manure and other water-containing waste products (same as raw materials to be processed)
A circulation system for generated steam is installed between a hot stove with a steam pipe and a combustion chamber and a multi-stage dry carbonization furnace,
The raw material to be treated is received in the upper stage of the dry carbonization furnace, the dry carbonization process proceeds while being sequentially transferred to the lower stage, the generated steam is taken out from the middle stage, and branched into the steam pipe and the combustion chamber of the hot stove through the dust collector. And a drying heat source circulating mechanism that recirculates the high-temperature steam reheated by passing through the steam pipe to the upper and lower stages of the drying carbonization furnace and serves as a new drying heat source,
A dry and dry carbonization apparatus for water-containing waste products, wherein a carbide and an ash are generated while circulating a heat source in a closed system. An air preheater is attached to the hot blast stove, and the excess generated steam introduced into the combustion chamber is deodorized.The heat is introduced into the air preheater together with the combustion exhaust gas to exchange heat, and the preheated outside air is sent to the combustion chamber to reduce it. 4. The drying and carbonizing apparatus for a water-containing waste product according to claim 3, further comprising an exhaust heat recovery mechanism for discharging the heated steam to the atmosphere via a ventilation means. 5. The dry carbonization apparatus for a water-containing waste product according to claim 3 or 4, further comprising a secondary fuel supply means for taking out a part of the dried product intermediately produced from the dry carbonization furnace outside the furnace and supplying it to a hot blast stove. .

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