JPH03207792A - Continuous wood carbonization device utilizing electric oven - Google Patents

Abstract

PURPOSE:To enable to readily and efficiently carbonize wood in a short time by heating a box receiving the wood and a combustion-improving filler to subject one part of the filler surrounding wood to an oxidative exothermal reaction. CONSTITUTION:An electric oven equipped with a pre-heating zone 3 and a cooling zone 3 before or behind a heating zone is employed, and in the electric oven a carrying inlet 4 and an exhausting opening 11 having a blower 10, respectively, are disposed in the oven. A roller conveyor 9 reaching from the carrying inlet 4 to a carrying outlet 7 on the side of the cooling zone 3 is disposed on the lower floor of the electric oven. The conveyor 9 is provided with a plurality of box-like containers B to be successively carried, each of the box-like containers receiving wood 19 and a combustion-improving filler 20 therein and being provided with a small gas-sucking opening 17 for taking a combustion gas and with a discharging opening 18 for heated produced gases. The blower 10 is operated to form a stream of the atmosphere reaching from the carrying outlet 7 to the gas-discharging opening 11 for continuously carbonizing the wood.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous wood carbonization apparatus using an electric furnace.

[Conventional technology]

Traditionally, charcoal kilns have been used to carbonize wood. That is, the wood cut to an appropriate size is arranged in a charcoal kiln, the entrance is closed, the kiln is turned on, and a small amount of air (oxygen) is allowed to enter to let it burn incompletely for about a week. The kiln is stopped and the coal is extracted after waiting for the kiln to cool down to a certain extent.

[Problem to be solved by the invention]

In the production of charcoal using the above-mentioned charcoal kiln, one operation takes a long time of one week or more, and the quality of the charcoal may vary depending on the arrangement position of the wood, the amount of air supplied, and the temperature of the fire. In addition, the condition of the kiln changes slightly each time due to cracks that occur during charcoal firing, so there is a risk that the quality of the charcoal will be inconsistent. Therefore, conventional charcoal kilns have the disadvantage that it is difficult to obtain charcoal of stable quality unless one is an expert who is familiar with the effects of the above factors.

Therefore, the present invention has been made to eliminate the above-mentioned drawbacks, and is a continuous wood carbonization device using an electric furnace that allows stable quality charcoal to be obtained continuously in a short time even without being an expert. The purpose is to provide

[Means to solve the problem]

In order to achieve the above object, the present invention uses an electric furnace equipped with a preheating zone and a cooling zone before and after the heating zone, a door is attached to the entrance on the side of the preheating zone, and an exhaust port with a blower is provided in the preheating zone. , a roller conveyor is installed in the electric hearth section from the loading port to the cooling zone side loading port, and a plurality of box-shaped containers are sequentially moved on the roller conveyor from the loading port to the loading port, and each container is filled with wood and wood. The container contains a filler for auxiliary combustion, and the container has a small intake port for taking in combustion gas and an exhaust port for heated gas, and the atmosphere flows from the outlet to the exhaust port by the operation of a blower. do.

[Function] In the continuous wood carbonization apparatus using the electric furnace according to the present invention, the cooling zone,
This creates a flow of atmosphere through the heating zone and toward the outlet of the preheating zone. While the box-shaped container is placed on a roller conveyor and sequentially moves from the preheating zone to the heating zone and cooling zone, the wood inside the container is preheated and dried in the preheating zone, heated and carbonized in the heating zone, and cooled in the cooling zone. Each container is then extruded from the outlet.

〔Example〕

Hereinafter, a continuous wood carbonization apparatus using an electric furnace according to the present invention will be specifically described with reference to the drawings. The apparatus of the present invention includes an electric furnace F having a preheating zone 2 and a cooling zone 3 before and after a heating zone 1, and a plurality of box-shaped containers B that are sequentially moved within the electric furnace F.

In the electric furnace F, each zone 1, 2.3 has the same length, a door 5 and a workbench 6 are installed at the entrance 4 in front of the preheating zone 2, and a workbench 8 is attached to the entrance 7 behind the cooling zone 3. A roller conveyor 9 for transporting the container B is installed over the inner floor of the electric furnace F and both work tables 6 and 8.
Install an exhaust port 1 with an exhaust blower 10 on the top of the preheating zone 2.
1 is provided.

The resistance heating elements 12 provided in the heating zone 1 are disposed on both sides of the heating zone 1 to heat the container B from both sides, and reference numeral 13 in FIG. 3 indicates the electrodes thereof. Further, reference numeral 21 indicates a frame for the electric furnace F.

Container B is a box-shaped container body 14 covered with a lid 15.
A pair of cylindrical bodies 16 communicating with the inside of the container B are provided at the lower part of the front end side of the main body 14, a small intake port 17 is provided in the cylindrical bodies 16, and an outlet port 18 is provided at the rear end side of the lid 15. The relationship between the size of container B and the size of each zone 1, 2.3 of electric furnace F is shown below.

0.6W≦By≦0.8W O. 6H≦Bh≦0.8H O. 6L≦B1≦0.8L However, By, Bh, and B1 are containers (does not include cylinder 16)
The outer width, outer height, outer length, W, H, and L are for each band 1 and 2.
．． These are the inner width, inner height, and inner length of 3.

The total length of the container B including the cylindrical body 16 is for each zone 1, 2,
Equal to the inner length of 3.

Inside the container B, wood 19 and powdered combustion auxiliary filler 20 are stored. As the filler 20, dry sawdust, rice husks, and their cinders with a moisture content of about 10% are used, and fill the gaps so as to wrap around the wood 19.

The apparatus of the present invention is constructed as described above.
energizes and operates the blower 10. Here, loading entrance 4
Since the door 5 is normally closed, the cooling zone 3,
An atmosphere flows through the heating zone 1 and the preheating zone 2 to the exhaust port 11, and the inside of the preheating zone 2 is heated by the hot air from the heating zone 1. Container B containing wood 19 and filler 20
is placed on the roller conveyor 9 on the workbench 6 on the side of the loading entrance 4, the door 5 is opened at predetermined intervals, one container B is pushed into the electric furnace F using a busher (not shown), and the door 5 is closed. . By repeating this operation, the container B will be moved in the electric furnace F from the pre-heating zone 2 to the heating zone 1, from the heating zone 1 to the cooling zone 3, at predetermined intervals, and will finally be placed on the workbench on the side of the unloading port 7. Extruded onto 8.

In the preheating zone 2, the temperature inside the container B rises to about 100° C. by the hot air from the heating zone 1, and the wood 19 and the filler 20 are preheated and dried.

When heated to approximately 400°C by the resistance heating element 12 in the heating zone 1, air (oxygen) enters the container B from the intake port 17.
As a result, part of the filler 20 generates heat of oxidation, that is, burns, and the temperature inside the container B rises to around the temperature of the heating zone 1 (approximately 400° C.), promoting carbonization of the wood 19 due to thermal decomposition. It is desirable that this intake port 17 be made small so that the wood 19 will not be completely burned. Heated gases such as carbon dioxide and tar produced by thermal decomposition pass through the heating zone 1 and the preheating zone 2 from the exhaust port 18, and are sucked and discharged by the blower 10 through the exhaust port 11.

As a result of the experiment, the optimum combination of heating temperature and heating time in heating zone 1 was 400° C. for about 1 hour.

Also, at 380°C to 400°C, it takes about 1 hour and 30 minutes, 45
At 0°C, it took about 40 minutes.

In the cooling zone 3, the sufficiently heated container B is extruded from the heating zone 1, but air from outside the furnace flows in from the outlet 7 by the blower 10 to cool the heated container B.

Container B pushed out from the cooling zone 3 onto the workbench 8 on the side of the outlet 7
Then, the lid 15 is opened and the charcoal, that is, the charcoal of the wood 19 inside, is sorted out using a sieve or the like.

Further, the unburnt filler 20 and some of the combustion materials are mixed with new filler 20 and reused.

〔Effect of the invention〕

As described above, this invention stores a combustion-assisting filler together with wood in a container, and provides an intake port for introducing a small amount of oxygen into the container and an exhaust port for blowing out heated gas. Since it is heated to a predetermined temperature to oxidize and heat a portion of the filler surrounding the wood, the wood can be easily and efficiently carbonized in a short time.

In addition, an electric furnace equipped with a preheating zone and a cooling zone before and after the heating zone is used, and a roller conveyor is installed on the floor of the electric furnace to sequentially transport multiple containers containing wood and filler to the electric furnace. Since the charcoal is carried out by a person, the heating temperature and heating time can be easily controlled, and therefore charcoal of stable quality can be continuously produced by setting uniform carbonization conditions.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a continuous wood carbonization apparatus using an electric furnace according to the present invention, and FIG. 2 is a temperature distribution diagram of the apparatus of the present invention. 3 is a partially cutaway perspective view taken along line A--A in FIG. 1, FIG. 4 is a perspective view of the container, and FIG. 5 is a vertical sectional view of the container. B... Box-shaped container, F... Electric furnace, 1... Heating zone,
2... Pre-preparation zone, 3... Cooling zone, 4... Loading entrance, 5
...Door, 7...Exit, 9...Roller conveyor,
10...Blower, 11...Exhaust port, l7...Intake port, 18...Exhaust port, 19...Wood, 20...10 fillers) Procedural amendment. (Spontaneous) 1. Indication of the case: Patent Application No. 3801, filed in 2013. 2. Title of the invention. 5. Figure 2 of the drawing to be amended is amended as shown in the attached sheet. Figure 2

Claims (1)

[Claims] 1. Pre-heating zone (2) and cooling zone (3) before and after heating zone (1)
Using an electric furnace (F) equipped with
A door 5 is attached to the preheating zone (2), an exhaust port (11) with a blower (10) is provided in the preheating zone (2), and an exhaust port (11) with a blower (10) is installed on the floor of the electric furnace (F) from the loading port (4) to the cooling zone (3) side loading port (7). ) to the roller conveyor (
9) and a plurality of box-shaped containers (B) that are sequentially moved on the roller conveyor (9), and the containers (B) contain wood (19) and combustion assisting filler (20). The container (B) is provided with a small intake port (17) for taking in combustion gas and a discharge port (18) for heating generated gas, and is moved from the discharge port (7) to the exhaust port (11) by the operation of the blower (10). A continuous wood carbonization device that uses an electric furnace and is characterized by a continuous flow of atmosphere.