JPH1054523A - Rotary kiln type combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve efficient combustion by heating by a method wherein a rotary kiln is installed in parallel, and with the rotation of a blade, a material to be incinerated is raked upward and sent forward to be flown evenly in a space of a primary combustion chamber. SOLUTION: In this combustion apparatus, a hopper, a hopper screw, a burner and a primary air blower are arranged on the front part of a rotary kiln horizontally rotating, a secondary combustion chamber is linked to the rear part thereof and a burner, a secondary air bower and an exhaust gas outlet are arranged. In this case, at least more than one blades 20 are protrusively arranged being inclined downward at a specified angle on circular surfaces arranged in the direction of feeding from the inlet side of the internal circumferential surface of the rotary kiln and the blades 20 on the circular surfaces are arranged spirally on the subsequent circular surfaces shifting the positions thereof sequentially in the direction of rotation. A matter to be incinerated is raked up by the blade 20 on the front circular surface so that the matter drops to be sent to the subsequent circular surface. Then, the matter to be incinerated is evenly stirred up as a whole by the blade on the circular surface. Thus, the matter is sequentially raked up by the blades 20 on the circular surfaces in the direction of feeding it to be sent forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary kiln type combustion apparatus for burning various wastes.

[0002]

2. Description of the Related Art Conventionally, as shown in JP-A-7-293842, an inner wall near the upper end of a rotary kiln that is slightly inclined with respect to a horizontal plane, is rotatably held about a cylindrical axis, and is driven by a rotary driving device. A rotary kiln-type combustion device is known in which three types of blade-like members are arranged in a vertical annular plane, and the incineration material is lifted, dried, and incinerated while rotating the rotary kiln. .

[0003]

In the above prior art, the object to be incinerated in the rotary kiln is lifted vertically from above only by moving the rotary kiln forward by moving the rotary kiln slightly inclined with respect to the horizontal plane. As a result, it receives a thrust load, the structure becomes complicated to receive the thrust load, and excessive force is applied and it is easily damaged, and the incinerated material becomes a relatively large lump in the rotary kiln,
There is a problem that the dispersion is insufficient, heat is hardly transmitted to the inside of the lump, and the combustion efficiency is poor.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by disposing a hopper, a hopper screw, a burner, and a primary air blower in front of a rotary kiln rotating in a horizontal state, In a rotary kiln-type combustion device in which a secondary combustion chamber is connected to a burner, a secondary air blower, and an exhaust gas outlet, at least two or more sheets are provided on each annular surface facing the feed direction from the inner peripheral surface inlet side of the rotary kiln. The blades of the annular surface are projected downwardly at a predetermined angle, and the blades of the annular surface are sequentially displaced in the rotation direction to the next annular surface and spirally arranged, and the incinerated material is disposed by the blade of the annular surface in front. Such as scraping, dropping and feeding into the next annular surface, scraping up the entire incinerated material with the blades of the annular surface, uniformly stirring up with the blades of the annular surface in the feeding direction, and sending forward. Specially To.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the illustrated embodiments. Reference numeral 1 denotes a rotary kiln, in which an annular body 2, 2 fixed to two locations on the outer periphery is rotatably mounted on rollers 4, 4 provided on a base 3. Reference numeral 5 denotes a motor disposed on the base 3, and a gear 6 of an output shaft of the motor 5 meshes with a gear 7 fixed to the outer periphery of the rotary kiln 1. Reference numeral 8 denotes a hopper for charging the incineration material at the front of the rotary kiln 1, and reference numeral 9 denotes a hopper screw. 10
Reference numeral denotes a burner disposed at the entrance of the primary combustion chamber 11 in the rotary kiln 1, and reference numeral 12 denotes a primary air blower to the primary combustion chamber 11. The secondary combustion chamber 1 is located at the rear of the rotary kiln 1
The secondary air blower 14 and the burner 15 are provided in the lower part. Reference numeral 16 denotes an exhaust gas outlet. The inner surface of the rotary kiln 1 is divided into a number of annular surfaces having the same width in the feed direction, and at least two blades 20 as shown in FIG. ,
The blades 20 of the annular surface are spirally disposed so as to be sequentially shifted in the rotational direction to the next annular surface.

Next, the operation will be described. The incineration material put into the hopper 8 is carried into the rotary kiln 1 by the hopper screw 9. The rotary kiln 1 is rotated by a motor 5, and an internal primary combustion chamber 11 is heated by air from a primary air blower 12 and a burner 10. The object to be incinerated sent to the annular surface on the inlet side of the rotary kiln 1 is scraped up by the blades 20 on the first annular surface. Since the blade 20 is inclined downward in the feed direction S, it falls on the next annular surface while rotating upward. Then, it is scraped up by the blades 20 protruding from the annular surface, and similarly dropped upward to the next annular surface while being scraped upward, and successively dropped and agitated while being scraped up in the feed direction. The material is the primary combustion chamber 11 in the rotary kiln 1
Since it is sent while being evenly scattered to the internal space, the entire incinerated object is uniformly heated and burned. And the secondary combustion chamber 13
Inside, it is sufficiently heated and burned by the secondary air blower 14 and the burner 15 from below. Note that the inclination angle, the number, and the like of the blades 20 are changed according to the type of the incineration object.

[0007]

According to the present invention, a hopper, a hopper screw, a burner, and a primary air blower are provided at the front of a rotary kiln rotating in a horizontal state, and a secondary combustion chamber is connected to a rear of the rotary kiln. In a rotary kiln type combustion device provided with a blower and an exhaust gas outlet, at least two or more blades are inclined downward and project at a predetermined angle on each annular surface facing the feed direction from the inlet side of the inner peripheral surface of the rotary kiln, The blades of the annular surface are sequentially displaced in the rotating direction to the next annular surface and spirally arranged, and the incinerated material is scraped up by the blades of the annular surface in front, dropped into the next annular surface and sent, The entire surface of the object to be incinerated is agitated uniformly by the blades of the annular surface, and the whole of the object to be incinerated is sequentially agitated by the blades of the annular surface in the feed direction and then sent forward, so that the object to be incinerated is uniformly scraped in the rotary kiln. Up Since it is possible to scatter,
The combustion effect can be significantly improved.In addition, there is no need to install the rotary kiln inclined forward in order to send the incinerated material inside the rotary kiln forward, and stirring and feeding are performed only by rotating the blades without using screws. It is possible to make the entire configuration simple and inexpensive.

[Brief description of the drawings]

FIG. 1 is a front sectional view of one embodiment of the present invention.

FIG. 2 is a sectional side view of the rotary kiln of FIG. 1;

FIG. 3 is a developed plan view of the rotary kiln of FIG. 1;

FIG. 4 is a plan view of the blade of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary kiln 2 Ring 3 Base 4 Roller 5 Motor 6 Motor output shaft gear 7 Rotary kiln gear 8 Hopper 9 Hopper screw 10 Burner 11 Primary combustion chamber 12 Primary air blower 13 Secondary combustion chamber 14 Secondary air blower 15 Burner 20 Blade

Claims (1)

[Claims] 1. A hopper, a hopper screw, a burner, and a primary air blower are provided at a front portion of a rotary kiln rotating in a horizontal state, a secondary combustion chamber is connected to a rear portion, and a burner, a secondary air blower, and an exhaust gas outlet are provided. In the rotary kiln type combustion device arranged, at least two or more blades are inclined and project downward at a predetermined angle downward on each annular surface facing the feed direction from the inlet side of the inner surface of the rotary kiln, and the blades of the annular surface are removed. Displaced in the direction of rotation sequentially to the next annular surface and spirally arranged, scraped up the incinerated material with the blade of the previous annular surface, dropped and sent to the next annular surface, and the blade of that annular surface A rotary kiln-type combustion apparatus characterized in that the entire incineration material is uniformly stirred, and is sequentially agitated with blades of an annular surface in a feeding direction and then fed forward.