JPS59147909A - Combustion method - Google Patents

Abstract

PURPOSE:To burn waste matters efficiently without generating soot and toxic gas, by sucking the primary combustion gas in a communicating pipe, by mixing it with the secondary air, after flames are extinguished in a quenching part which is provided in the middle of a communicating pipe, and by performing pre-mixed combustion by feeding the mixed gas into the secondary combustion part and by re-igniting it. CONSTITUTION:A fuel hopper 15 is closed after a fuel A is loaded in a furnace body 12 from a fuel hopper 15, the fuel is ignited, and a rotary blades 40 in a suction part 4 is rotated. The primary fuel gas is sucked into a communicating pipe 3, and is led into a quenching part 31, where flames are extinguished while the gas is passing through narrow gaps between a side wall 34 and a baffle plate 30. This combustible gas is sucked into the suction part 4, together with the secondary air which is introduced from a secondary air inlet pipe 32, and is stirred and mixed with the air, and the mixed gas is fed into the secondary combustion chamber 2. The gas is burned secondarily by being re-ignited by an ignition burner 20 or the like. By this method, waste tire, plastic waste, and the like can completely be burned, efficiently, without soot and toxic gas being generated from them.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to solid combustible materials such as coal, waste tires, plastic waste, chicken manure, and combustible garbage, and heavy oil.

Conventionally, when burning combustible materials in heating furnaces, incinerators, etc., it is extremely large-scale and complicated to prevent incomplete combustion, prevent soot and toxic gas from being emitted, and improve combustion efficiency. The disadvantage was that it required extensive combustion equipment.

This invention was made to eliminate the above-mentioned drawbacks, and it is possible to burn coal, heavy oil, etc. with simple equipment without generating soot or toxic residue, and to burn combustible dust, waste oil, etc. with full efficiency. The present invention provides a combustion method that allows for easy incineration of all waste materials. That is, in this invention, a combustible material is loaded into a primary combustion section having a primary air inlet and ignited, the primary combustion is carried out in the secondary combustion section, the flames of the primary combustion generate a large amount of combustible scum, and this The combustion residue is sucked into the communication pipe by a suction means, and the fire extinguishing section installed in the middle of the communication pipe is passed through a small gap (after extinguishing the flames of the primary combustion, A mixed gas is generated by introducing secondary air into the pipe, and after supplying this mixed gas to all secondary combustion sections, it is re-ignited and premixed combustion is performed in the secondary combustion section. Some 0 Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an apparatus for carrying out this invention,
In the figure, 1 is a primary combustion section, 2 is a secondary combustion section, and 6 is a communication pipe that communicates the primary combustion section 1 and the secondary combustion section 2. The above-mentioned fire combustion section 1 is composed of a primary combustion section main body 12 having a primary air inlet 10 and an ash removal section 11 in the side wall, and a hopper 16 for supplying combustible materials connected to the upper part of the main combustion section main body 12. . The primary air inlet 10 is provided with a shielding plate 14 for adjusting the amount of primary air introduced. A rear end portion of a communication pipe 6 is connected to a side wall portion of the hopper 16, and a distal end portion of the communication pipe 6 is connected to the secondary combustion section 2. A fire extinguishing section 51 having 60 baffle plates is provided on the rear end side of the communication pipe 6, and an inlet 52 and a suction section 4 for secondary air are provided on the distal end side. This suction unit 4 has a rotary blade 40 that is rotated by an electric motor (not shown), and sucks air from the rear end side of the communication tube 6 using centrifugal force generated as the rotary blade 40 rotates. It is configured to discharge the liquid to the distal end side. Note that the secondary air inlet 62 is provided with a throttle valve 66 for adjusting the opening.

Next, a method for burning solid combustible materials such as waste tires using the apparatus configured as described above will be described. first,
- After loading fuel Ai into the primary combustion section main body 12 from the fuel input section 15 formed at the upper part of the hopper 16 of the fire combustion section 1, the fuel input section 15 is closed. Next, the fuel A is ignited by an ignition burner inserted through the secondary air inlet 10. By rotating the suction section 4 by X40ffi, the primary combustion gas in the primary combustion section 1 is sucked into the communication pipe 6. As a result, - next air inlet 1
Primary air is introduced into the primary combustion section 1 from 0, and the -order combustion continues. In this case, - the amount of primary air introduced is limited by adjusting the full opening of the secondary air inlet 10 with the shielding plate 14, and - the fuel A is incompletely combusted in the fire combustion section 1, resulting in the flame of the primary combustion. It also generates a large amount of flammable gas. The combustion temperature in this -fire combustion section 1 is 65" to 50 (
Approximately 1Pc is appropriate.

As described above, this primary combustion residue is sucked into the communication pipe 6 and introduced into the fire extinguishing section 61, and passes through the narrow gap between the fire extinguishing section local wall 64 and the baffle plate 60, thereby causing the primary combustion scum to ignite. is erased. That is, when passing through the gap, heat is removed from the primary combustion gas by the fire extinguishing section wall 64, and a large amount of combustible gas such as soot, carbon oxide, and unburned hydrocarbons is present in the gas passing through the gap. That will happen. This combustible gas is sucked into the suction section 4 together with the secondary air introduced from the secondary air inlet 52, and is stirred and mixed to become a mixed gas and supplied into the secondary combustion section 2.

Then, the mixed gas is re-ignited by an ignition burner 20 or the like provided in the secondary combustion section 2 to cause secondary combustion.

In this way, after primary combustion of fuel A is carried out in the fire combustion section 1 and the flame of the generated primary combustion residue is extinguished, the remaining combustible gas' is sucked into the suction section 4 together with secondary air. Since they are mixed, the secondary combustion section 2 is supplied with a mixed gas in which the combustible gas and the secondary air are mixed in advance, and premix combustion is performed in the secondary combustion section 2. Therefore, even materials that are difficult to burn, such as vinyl chloride, can be completely combusted in the secondary combustion section 2, and the combustion temperature will be 1000°C or higher. Therefore, waste tires, plastic waste, chicken manure, combustible garbage, etc. can be incinerated without producing soot or toxic gases, and coal, etc. can be burned efficiently, reducing air pollution. do not have. This fact has also been confirmed by tests conducted by the present inventor, ie, tests for measuring the content of carbon monoxide in the exhaust gas from the secondary combustion section 2. Furthermore, since the mixed gas is forcibly supplied from the suction section 4 to the secondary combustion section 2, there is an advantage that backfire or explosion can be prevented from occurring within the communication pipe 5.

Moreover, incomplete combustion occurs in the -fire combustion section 1 and the secondary combustion gas is at a low temperature, so that the configurations of the -fire combustion section 1 and the communication pipe 6 can be simplified. In particular, the fire extinguishing section 61
, the primary combustion flame is extinguished and cooled to about 150° to 200°C by the secondary air, so the inside of the suction part 4 is not exposed to such a high temperature, and the rotor blade 40
It is possible to reliably prevent burnout such as. In addition, by changing the rotational force of the rotor blade 400 according to the nature and amount of fuel used, the suction force can be changed, and the amount of secondary air introduced can be adjusted to ensure that the primary combustion is always in a good state, that is, with good combustible residue. It is possible to maintain the state in which the secondary air is generated, and to always achieve complete combustion in the secondary combustion section 2 by adjusting the amount of secondary air introduced. In this case, the shielding plate 1
4 and the throttle valve 66 to adjust the opening If''k of the primary air and secondary air inlets 10.32.
This allows for better combustion.

In addition, when burning liquid combustibles such as heavy oil and waste oil, a fuel injection nozzle is provided in the primary combustion section 1 and the sprayed fuel is ignited for primary combustion, or -
The oil-impregnated body provided in the fire combustion section 1 may be dripped with fuel to impregnate it, and then ignited.

゛However, a high chimney is provided in the secondary combustion section 2 as a suction means for the secondary combustion gas and secondary air, and the suction force generated by releasing the exhaust gas of the secondary combustion into the atmosphere through this chimney is utilized. You can also. Further, as shown in FIG. 2, a secondary air supply port 41 is provided at the tip end side of the communication pipe B, and this supply 1141 is connected to a blower 42 or an air compressor serving as a secondary air supply source, This blower 42 etc. are all activated to inject all the secondary air toward the secondary combustion section 2 at high speed, and the rear end side of the communication pipe 6 is depressurized to remove the primary combustion residue in the primary combustion section 1 from the communication pipe 6. [7] may be used so that it is sucked inside. Furthermore, as shown in FIG. 6, a spark ignition engine 21 is used as a secondary combustion section, and the piston
The primary combustion scum and secondary air can also be sucked in by the suction force generated by reducing the pressure inside the shifter 25 when the shifter 2 is lowered. In all of these cases, the combustible gas and the secondary air are mixed in the secondary air introduction section.

As explained above, this invention provides combustion #4 in the primary combustion section.
The primary combustion flame and a large amount of combustible gas are generated by incomplete combustion of After extinguishing the flame, secondary air is introduced into the communication pipe and mixed with the above combustible gas, which is then supplied into the secondary combustion section and re-ignited. Combustible gas can be premixed and combusted in the secondary combustion section and completely combusted without producing soot or toxic gases, resulting in excellent combustion efficiency.
Moreover, it can prevent backfire and explosion.

Furthermore, since the -fire combustion section and the communication pipe do not reach such a high temperature, burnout can be prevented and the equipment can be simplified.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one example of an apparatus for carrying out the invention, and FIGS. 2 and 6 are partial sectional views showing other examples of the apparatus for carrying out the invention. 1...-fire combustion section, 2. secondary combustion section, 6... communicating pipe, 4
．． 42...Suction means, 1D...Next air inlet, 3
0. Baffle board, 31. Fire extinguishing section. Patent applicant: Mai Ueshima

Claims (1)

[Claims] 1. A combustible material is loaded into a primary combustion section having an air inlet and ignited, and primary combustion occurs in the secondary combustion section to generate a primary combustion flame and a large amount of combustible gas. is sucked into the communicating pipe by a suction means, and the primary combustion flame is extinguished by extinguishing the primary combustion flame by passing through a small gap in the extinguishing section provided in the middle of the communicating pipe, and then all of the secondary air is introduced into the communicating pipe. Then, the combustible scum in the above-fired combustion gas is completely mixed with the secondary air to produce a mixed gas (2), and after supplying this mixed gas to the secondary combustion section, it is re-ignited and re-ignited in the secondary combustion section. A combustion method characterized by premixed combustion.