JPH1121560A - Carbonization furnace unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contribute to the protection of pollution by wastes, the change of the environment for the better by means of charcoal and the like, by providing a unit which can convert wood, organic wastes and the like to a uniform carbonization product with good efficiency. SOLUTION: In ceramic furnace 1, a void space 5 provided above porous bucket 3 which contains the material to be carbonized is communicated with firing burner 4. Gas tube 1 connecting to void 6 under porous bucket 3 is disposed to communicate with the outside of ceramic furnace 1, which tube is connected to ejector 8 and, through the ejector, to carbonization gas burning furnace 9. A plurality of this series comprising ceramic furnace 1, gas tube 7 and ejector 8 are connected to the same carbonization gas burning furnace 9, and at least a part of an exhaust pipe disposed above the carbonization gas burning furnace is allowed to communicate with the void space above the ceramic furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in a carbonizing furnace for widely and efficiently carbonizing various building wastes, organic wastes, etc., including plants such as wood.

[0002]

2. Description of the Related Art In addition to the well-known black charcoal kiln and white charcoal kiln, various types of continuous or discontinuous kilns and rotary kilns with a non-oxidizing environment are used for making charcoal. Widely used.

[0003]

What can be said in common with such a conventional carbonizing furnace is that the temperature unevenness inside the kiln tends to be large, and the temperature becomes partially too high or burns (ashes). However, it is inefficient to maintain high quality coal, and there are difficulties in carbonizing various materials, including waste, in terms of profitability and flue gas treatment. An object of the present invention is to provide a carbonization furnace capable of solving such difficulties and efficiently converting organic matter such as waste into coal having useful adsorptivity and other physical properties.

[0004]

In the kiln (1), an air gap (5) connected to an ignition burner (4) is provided above a gas permeable bucket (3) for accommodating a carbonized material (2). An intake pipe (7) is provided from the gap (6) located below (3) and led out of the kiln (1), and an ejector (8) is attached to the intake pipe (7). Connect to 9).

[0005] Further, as shown in the drawing, one or more of the same series of the kiln (1), the intake pipe (7), the ejector (8) and the like are connected to the carbonization gas combustion furnace (9). It is desirable to be done.

[0006] It is further desirable that at least a part of an exhaust pipe (10) provided above the dry distillation gas combustion furnace (9) communicates with a space (5) above the kiln (1). Also in this case, as shown in the drawing, the exhaust pipe (10) is branched and penetrated through the kiln (1) so as to reach both the gaps (5).

When the carbonization has sufficiently proceeded, water is sprayed from above onto the carbonized material (2) in the bucket (3) to blow off the residue inside the charcoal and form fine bubbles. Although illustration of the water injection device is omitted, this can be easily achieved by existing technology and design.

[0008]

The object to be carbonized (2) in the kiln (1) is heated from above by the flame of the ignition burner (4) at the upper part, unlike ordinary heating from below. Therefore, the convection phenomenon does not occur as it is, and the lower part cannot be heated, but in the present invention, the gas in the kiln (1) is sucked from the suction pipe (7) provided below by the suction force of the ejector (8). Therefore, the gas present in the gaps between the carbonized materials (2) deposited therewith also moves downward with heat and exits the permeable bucket (3).

As a result, the self-combustion action of the material to be carbonized (2) also gradually shifts downward. At this time, unlike the conventional case involving natural convection, it is difficult to overheat, causing uneven burning and white carbonization. It has been found that carbonization can be performed more uniformly and efficiently.

Although the amount of residual oxygen in the furnace is small, the self-combustion action is also limited. However, the carbonized gas is sucked from below and mixed with air to reach the combustion furnace (9) via the ejector (8). Is completely burned. In this case as well, the complete combustion rate can be further increased by providing a double combustion device with existing technology, and the combustion heat can be arbitrarily and effectively used.

The exhaust gas discharged from the combustion furnace (9) is transferred to an upper exhaust pipe (10), which branches and at least partially enters the upper space (5) of the furnace (1) again. I do. Therefore, the heat of the heat is reused, sucked again from the intake pipe (7), and sent again to the same combustion furnace (9) to be completely burned. Adjustment and opening / closing of such a gas flow rate can be performed by a damper (11) attached to a key point of the pipe.

Further, when such a series of kilns (1) and the like are provided and connected not only from one of the combustion furnaces (9) but also from the other, one carbonized material (2) is carbonized. Even when the furnace is finished and replaced, if the other kiln is operating, the combustion furnace (9) can be operated continuously without erasing, which is extremely efficient, and at the same time, for example, waste of building materials and organic Even in the case where the composition is remarkably different from the sludge cake and the temperature raising characteristics are largely different, the damper (11) can be opened and closed appropriately to realize the firing corresponding to each case at a time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a kiln (1) as shown in FIG.
2) is a chamber opening / closing device to which a water injection device (not shown) is connected if necessary. The upper gap (5) is large enough to contain the flame of the ignition burner (4),
The outside of a breathable bucket (3) with a number of small holes at the bottom is covered with layers of castable (13), iron plate (14) and foam (15) to reach the outer wall of the furnace. A damper (11), an air inlet (16) and an ejector (8) with a blower are provided in an intake pipe (7) penetrating therethrough at a lower portion, and introduced into a carbonization gas combustion furnace (9) ahead. . The interior is divided into a primary furnace (91) and a secondary furnace (92),
Each contains a burner (17) and a blower (18) and is covered with a super heat resistant antioxidant. A weight-type safety valve (19) is provided above the exhaust pipe (10) provided thereabove.
The pipe is branched under the pipe, two dampers (11) are provided on the way, and the pipe is introduced again into the upper space (5) of the furnace (1). Another similar series of devices is connected to the combustion furnace (9) symmetrically.

For refining, a blower (blower; not shown) is provided at the lower part of the kiln (1), and a water injection device (not shown) is further provided at the upper part. This is to improve the quality of charcoal by sending oxygen into the furnace after a predetermined firing time to temporarily raise the temperature, injecting water into it, causing a steam explosion, and flying off the residue in the internal voids of the charcoal. It is for. The present invention is not limited to such an example.

[0015]

As described above, according to the present invention, heating suitable for carbonization can be performed uniformly and efficiently under a controlled condition.
Waste such as building debris, dewatered sludge and food waste can be converted to high-quality coal at extremely low cost, which has the effect of greatly contributing to the prevention of waste pollution and the improvement of the environment through the properties of coal.

[Brief description of the drawings]

FIG. 1 is a side and sectional view of an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Furnace 2 ... Carburized material 3 ... Breathable bucket 4 ... Ignition burner 5 ... Air gap 6 ... Gap part 7 ... Intake pipe 8 ... Ejector 9 ... … Drying gas combustion furnace 91… Primary furnace 92… Secondary furnace 10… Exhaust pipe 11… Damper 12… Chamber opening and closing device 13 …… Castable 14 …… Iron plate 15 …… Foaming material 16 Air inlet 17 Burner 18 Blower 19 Weight relief valve

Claims (3)

[Claims] 1. A space connected to an ignition burner is provided above a gas permeable bucket for accommodating a material to be carbonized in a kiln, and an intake pipe is provided from a gap located below the gas permeable bucket to lead out of the kiln. And an ejector attached thereto and connected to a carbonization gas combustion furnace ahead of the ejector. 2. The carbonization furnace apparatus according to claim 1, wherein a plurality of the same series of the furnace, the intake pipe, the ejector, and the like are connected to the dry distillation gas combustion furnace. 3. The carbonization furnace apparatus according to claim 1, wherein at least a part of an exhaust pipe provided above the dry distillation gas combustion furnace is communicated with a space above the kiln.