JPH05215304A - Combustion equipment - Google Patents

Abstract

PURPOSE:To provide a combustion equipment, in which the combustion temperature of fuel in a combustion furnace is elevated while damage of a piping opened into a fuel layer due to heat can be inhibited. CONSTITUTION:The combustion equipment has a combustion furnace 2 formed in an inverted truncated cone shape by winding a tube body 4, a water supply section 6 pressing and supplying air and water into the tube body 4, a nozzle 4b which mixes steam generated during a time when water is passed in the tube body 4 and air spraying the mixture into a fuel layer 7 during combustion, and a grate 8 covering the upper section of the nozzle 4b in the fuel layer 7. Accordingly, steam and air are mixed and sprayed, thus forming an oxyhydrogen flame, then conducting combustion having excellent efficiency at a high temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device, and more particularly,
The present invention relates to a combustion device that uses coke or the like as fuel.

[0002]

2. Description of the Related Art A combustion apparatus using coke as a fuel has already been proposed by the present applicant (Japanese Patent Laid-Open No. 62-15).
5411). This combustion device spirally winds up a conduit made of steel plate, etc. to form a furnace with an almost inverted truncated cone shape. It has a different configuration.

The coke is housed in the furnace of the above combustion device,
When burning, air or oxygen is fed while bubbling from the upper end of the conduit contained in the water tank. Then,
Moisture introduced into the conduit with air or oxygen is heated while flowing in the conduit and flows from the lower end of the conduit into the coke layer. Of the hot gas that has flowed out, oxygen gas promotes the oxidation of the coke layer, and the steam reacts with the coke to partially generate water gas.

[0004]

In the above-mentioned conventional combustion apparatus, since the steam flowing out into the coke layer becomes water gas, there is a problem that the furnace temperature is lowered and the combustion efficiency is lowered.

The present invention has been made in order to eliminate the above problems, and provides a combustion apparatus capable of preventing a decrease in furnace temperature and improving combustion efficiency.

[0006]

SUMMARY OF THE INVENTION A combustion apparatus according to the present invention comprises an inverted truncated cone-shaped combustion furnace composed of a wall surface having a space inside, and water and air pressurized in the space inside the wall surface. A water supply section for supplying the water, an injection port for mixing the steam generated by heating in the wall surface and the air and injecting the mixture into the fuel layer in the combustion furnace from below, and the injection port arranged in the fuel layer. And a grate over the top of.

[0007]

In the above-described combustion apparatus, since steam and air are mixed and blown into the fuel layer, an oxyhydrogen flame is generated, and efficient combustion is performed at high temperature without lowering the furnace temperature as in the case of water gas. Is performed.

[0008]

The present invention will be described below with reference to the illustrated embodiments.
FIG. 1 is a side view showing a part of a combustion apparatus according to an embodiment of the present invention as a cross section, and a combustion furnace 2 is formed by spirally winding a tubular body 4 made of, for example, a steel pipe,
Its shape is almost inverted frustoconical. The upper end 4a of the pipe body 4 is connected to a water supply unit 6 that pressurizes and supplies water together with air into the pipe body 4. Also, the lower end 4b of the tubular body 4
Is extended to the center of the combustion furnace 2, is erected upward, and opens into the coke 7 accommodated in the combustion furnace 2. An upper opening of the raised lower end portion 4b of the tubular body 4 is covered with a frustoconical grate 8 to provide a space 9.

When the combustion furnace 2 is formed by rolling up the tube body 4 in this manner, a gap is formed in a lower part of the tube body 4, but this portion is closed by a plate 10 such as a steel plate. Further, a skirt portion 12 is provided on the lower portion of the pipe body 4 along the outer periphery thereof, and a grate 14 is attached between the pipe body 4 and the skirt portion 12, and the skirt portion 12 is provided.
Air is introduced into the interior from the air hole 12a formed in the.

Next, the operation of the above combustion device will be described. The coke 7 is filled in the combustion furnace 2 and is ignited from the bottom. And after burning to some extent, the tube 4
The pressurized air and water are fed in from the upper end 4a of the. The water is heated by the heat of combustion of the coke 7 to pass through the pipe 4 of the combustion furnace 2 and reaches the opening 4b at the lower end to generate steam, which is mixed with the pressurized air. In this state, it is ejected into the Rostrur 8. An oxyhydrogen flame is generated from the jetted air and steam, and the coke is burned at a higher temperature without lowering the temperature in the combustion furnace 2 by generating water gas from the steam as in the conventional case.

As described above, according to the present embodiment, the steam and the air are mixed and blown into the roster 8, so that an oxyhydrogen flame can be generated and the coke 7 can be burned at a higher temperature. Further, since the lower end side opening portion 4b of the pipe body 4 is opened in the rostle 8 with a space therebetween and is not in direct contact with the burning coke 7, the heat damage of the opening portion 4b of the pipe body 4 is suppressed. can do.

FIG. 2 is a diagram showing a main part of a second embodiment of the present invention. This combustion apparatus has the same structure as that of the above embodiment except that the structure of the combustion furnace 20 is different. . That is,
The hollow wall 40 is formed in an inverted truncated cone shape, and a supply port 40a for supplying pressurized water and air is provided in the lower part thereof, and a discharge port 40b is provided in the upper part. And the upper outlet 40b
And the injection nozzle 42, which is inserted into the center of the lower portion of the combustion furnace 20 and is covered with the loss 48, are connected by a conduit 44.

Also in this embodiment, when the pressurized water and air are sent from the supply port 40a in a state where the coke 47 in the combustion furnace 20 is ignited and becomes red hot, the hollow wall 40 is formed.
While passing through, the coke 47 is heated by the heat of combustion to become water vapor, and the water is jetted from the jet nozzle 42 into the roster 48 together with the air. Then, an oxyhydrogen flame is generated to promote the combustion of the coke 47, and the same effect as that of the above-described embodiment can be achieved.

In each of the above embodiments, the case of burning coke has been described, but it goes without saying that the present invention can be applied to other combustion devices such as a refuse incinerator.

[0015]

As described above, according to the present invention, efficient combustion can be performed without lowering the temperature in the combustion furnace, and damage to the piping located in the coke due to heat is suppressed. can do.

[Brief description of drawings]

FIG. 1 is a side view showing a cross section of a part of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a main part of a second embodiment.

[Explanation of symbols]

 2 Combustion furnace 4 Wall surface (tubular body) 4b Injection port (lower end opening of tubular body) 6 Water supply part 8 Lost

Claims (3)

[Claims] 1. A combustion furnace having an inverted truncated cone shape, which is composed of a wall surface having a space inside, a water supply unit for supplying pressurized water and air to the space in the wall surface, and heating in the wall surface. A combustion apparatus comprising: an injection port that mixes the generated water vapor and air and injects the mixture into a fuel layer in a combustion furnace from below; and a rostrut that is disposed in the fuel layer and covers the injection port from above. 2. The combustion device according to claim 1, wherein the wall surface is formed by rolling up a tubular body such as a steel pipe. 3. The combustion apparatus according to claim 1, wherein the wall surface is formed of a hollow wall body.