JPH06341621A - Incinerator - Google Patents

Abstract

PURPOSE:To stabilize the whole burning operation of an incinerator by causing the combustion to occur in a predetermined position inside a rotary furnace. CONSTITUTION:In an incinerator provided with a rotary furnace 1 having a pyrolytic combustion area A formed therein and a stoker furnace 2 having a main combustion area B and an after-combustion area C formed therein, the rotary furnace 1 is provided at its outlet 1b with a gas removal pipe 12 for removing the pyrolytic gas produced in the rotary furnace 1 and at its inlet 1a with a low calorie burner 11 connected with the gas removal pipe 12 to burn the pyrolytic gas. In this way the low calorie burner is used as a firing burner for the pyrolytic gas and is made to effect its burning operation in a predetermined position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for incinerating dust and industrial waste, which comprises a rotary furnace forming a pyrolysis combustion zone and a stoker furnace forming a main combustion zone and a post combustion zone.

[0002]

2. Description of the Related Art As shown in FIG. 2, a refuse incinerator in which a rotary furnace and a stoker furnace are arranged side by side rotates around a horizontal axis O whose downstream side is inclined downward by a rotary drive means (not shown). A cylindrical rotary furnace 1 which is formed into a pyrolysis combustion zone A;
The upstream side grate 2A and the downstream side grate 2B are arranged so that the downstream side is inclined downward, and the upstream side grate 2A forms the main combustion zone B and the downstream side grate 2B forms the after combustion zone C, respectively. The stoker furnace 2 is arranged. Further, a dust introduction hopper 3 and a primary combustion air pipe 4 are provided at the inlet 1a at the upstream end of the rotary furnace 1, and a secondary combustion air pipe 5 is provided in each of the main grate 2A and the post-grate 2B. It is connected via the wind boxes 6A and 6B. Reference numeral 7 is an air supply fan that supplies these combustion air.

Then, the hopper 3 for throwing in the refuse is turned to the rotary furnace 1
The incinerator charged in (1) is heated in the rotary furnace 1 in an air-deficient state, low-calorie pyrolysis gas is generated, and pre-combusted (primary combustion). Next, the incinerated matter is sent out from the outlet 1b of the rotary furnace 1 onto the upstream grate 2A of the stoker furnace 2, and secondary combustion air is supplied onto the upstream grate 2A to vigorously main burn the secondary combustion chamber 8. After (secondary combustion), it is further sent out on the downstream grate 2B to be post-combusted.

[0004] According to the incinerator, lower the overall temperature of the rotary furnace 1, such as no occurrence of clinker be low NO _X, there is a great advantage.

[0005]

However, the ignition of the pyrolysis gas in the rotary furnace 1 occurs almost in the center of the rotary furnace 1 and its position is not fixed, so that the combustion in the rotary furnace 1 occurs in the main combustion region. There is a problem that the combustion of B is greatly affected and the combustion of the entire incinerator becomes unstable.

An object of the present invention is to solve the above problems and provide an incinerator capable of stabilizing the combustion of the entire incinerator by causing combustion in a rotary furnace at a fixed position.

[0007]

In order to solve the above problems, the present invention provides an incinerator having a rotary furnace forming a pyrolysis combustion zone and a stoker furnace forming a main combustion zone and a post combustion zone. In the above, a gas take-out pipe for taking out pyrolysis gas is provided at the outlet of the rotary furnace, and a low-calorie burner for burning the pyrolysis gas is provided at the entrance of the rotary furnace to connect the gas take-out pipe.

[0008]

In the above structure, the incinerator charged from the inlet of the rotary furnace is heated to generate the low-calorie pyrolysis gas, and the pyrolyzed gas taken from the outlet of the rotary furnace is burned by the low-calorie burner. By doing so, the pyrolysis gas generated from the incinerator is ignited and burned by the flame of the low-calorie burner, so the combustion position near the low-calorie burner becomes the ignition and combustion position of the rotary furnace, and the pyrolysis and combustion position remains constant. It can burn stably. Therefore, even if the incinerated matter is moved from the rotary furnace to the stoker furnace, main combustion and post combustion can be performed in a stable state on the grate, and stable combustion can be realized.

[0009]

EXAMPLE An example of an incinerator according to the present invention is shown in FIG.
It will be described based on. The same members as those of the related art are designated by the same reference numerals, and the description thereof will be omitted.

Reference numeral 11 denotes a low-calorie burner penetrating the cover at the inlet 1a of the rotary furnace 1, which ignites and burns the pyrolysis gas generated in the rotary furnace 1 to set the pyrolysis combustion position A in the rotary furnace 1. It is to keep it constant. Gas extraction pipe 12 for supplying pyrolysis gas to this low-calorie burner 11
Is connected to the suction port of the gas suction fan 13 by penetrating through the furnace wall of the secondary combustion chamber 8 at the base end of the low-calorie burner from the discharge port of the gas suction fan 13. A part of the pyrolysis gas discharged from the rotary furnace 1 to the secondary combustion chamber 8 by the suction fan 13 is taken out through the gas take-out pipe 12 and can be burned by the low-calorie burner 11. .

According to the above construction, the pyrolysis gas generated in the rotary furnace 1 is extracted at the outlet 1b of the rotary furnace 1 through the gas extraction pipe 13, and the low calorie burner 11 provided at the inlet 1a of the rotary furnace 1 is used. Low burner burner 1 because it burns
The flame of No. 1 becomes an ignition flame, the pyrolysis gas generated in the rotary furnace 1 can be stably burned at a fixed position, and by keeping the ignition combustion position in the rotary furnace 1 at a fixed position,
The combustion of the entire incinerator can be stabilized.

[0012]

As described above, according to the present invention, the pyrolysis gas generated in the rotary furnace is taken out from the outlet of the rotary furnace through the gas extraction pipe, and the pyrolysis gas is provided at the entrance of the rotary furnace. It can be burned with a low-calorie burner to ignite the pyrolysis gas generated from the incinerator by the flame of the low-calorie burner. Therefore, the vicinity of the combustion position of the low-calorie burner can be held at a fixed position as the pyrolysis combustion position of the rotary furnace, stable combustion can be performed, and even if the incinerator is moved from the rotary furnace to the stoker furnace, Main combustion and post-combustion can be performed in a stable state on the grate, and the entire incinerator can be stably burned.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an incinerator according to the present invention.

FIG. 2 is a configuration diagram of an incinerator showing a conventional incinerator.

[Explanation of symbols]

 A Pre-combustion area B Main combustion area C Post-combustion area 1 Rotary furnace 1a Inlet 1b Outlet 2 Stoker furnace 2A Upstream grate 2B Downstream grate 3 Waste input hopper 8 Secondary combustion chamber 11 Low-calorie burner 12 Gas extraction pipe 13 Gas suction fan

Claims (1)

[Claims] 1. In an incinerator having a rotary furnace forming a pyrolysis combustion zone and a stoker furnace forming a main combustion zone and a post combustion zone, a pyrolysis gas generated in the rotary furnace at an outlet of the rotary furnace. An incinerator, characterized in that a low-calorie burner is provided which is connected to the inlet of the rotary furnace and which burns pyrolysis gas.