KR100421075B1 - Air additional supply to the boiler combustion chamber - Google Patents

Abstract

The present invention relates to combustion in an industrial boiler combustion chamber, and more specifically, when all the fuel is combusted, when the main component of oxygen and the fuel in the air combines (oxidizes) in a constant ratio, the complete combustion value (C + O ₂ = CO ₂ is colorless and odorless). All fuels are not completely burned in nature because the carbon dioxide produced by the combustion of the fuel surrounds the burning flame surface, forming an invisible curtain, Since the flame center is incompletely burned due to lack of air, the thermal efficiency is reduced and fuel consumption is severe.

The existing boiler combustion chamber is supplied with a large amount of air to the blower in front of it, but it is supplied to the flame surface and the flame center reaches the center of the flame through only a part of the air through the curtain formed by carbon dioxide generated by the combustion of fuel. As it exits to the exhaust (chimney), the center of the flame is incompletely burned due to lack of air, which generates dust and fumes, which causes air pollution and severe fuel waste. Therefore, in order to burn the fuel that is incompletely burned due to lack of air, the carbon dioxide generated during combustion penetrates the invisible curtain formed on the surface of the flame and incompletely burns the air from the outside. When the additional air supply unit is installed in the combustion chamber, the combustion is performed incompletely due to lack of air, and the combustion of the center of the flame that generates the common smoke is activated, so that the fuel burns to the maximum (the light turns into bright colors). ) As the combustion temperature rises, the dust and soot that causes environmental pollution are greatly reduced (soot or dust is zero when it is completely burned), and there is no need for some pollution prevention facilities (soot and dust). As the heat efficiency improves, it provides additional air to save fuel. To provide a unit.

Description

Additional air supply to the boiler combustion chamber

Since the carbon dioxide generated by the combustion of fuel surrounds the flame surface and blocks the air, only a part of the supplied air is supplied to the center of the flame, so that the center of the flame is not in contact with the air due to lack of air, and thus the combustion chamber wall ( Outside the combustion chamber wall, the water-filled bucket is heated and loses heat, so the combustion is stopped and converted to carbon, and the carbon sticks to the boiler wall and the pipe in the water bottle, which acts as a thermal insulator and interferes with heat conduction. In order to prevent pollution, existing boilers are equipped with a heat transfer facility in an exhaust pipe (chimney) to burn smoke and dust, or a dust collector facility. To filter out soot and dust, resulting in incomplete combustion, resulting in heavy fuel consumption and operation of environmental pollution prevention facilities. Rain is added, and in order to maintain the boiler's performance, it is necessary to periodically remove carbon from the combustion chamber wall and the water pipe.

Therefore, an object of the present invention is that the fuel injected with the air in the boiler combustion chamber, the carbon dioxide generated when burning, forms an invisible curtain, so that only a part of the air supplied by blocking the air surrounding the flame surface is supplied with the flame In the central part, the air supply is not good, resulting in incomplete combustion due to lack of air.

Therefore, outside of the burning flame, the combustion center is activated by supplying new air in various directions to the combustion center through the veil formed by the carbon dioxide to activate the combustion, and the fuel is burned to the maximum, thereby reducing dust and soot to the maximum. do..

1 is a cross-sectional view of the boiler combustion chamber of the present invention cut up and down from the side and air flow diagram

2 is a cross-sectional view of the combustion chamber

3 is a cross-sectional view in a state where the cover is removed from the back of the boiler combustion chamber

Fig. 4 Sectional view of cutting one iron pipe from the side (air hole layout)

Fig. 5 Air hole arrangement diagram of the iron pipe (air hole on the side facing the boiler combustion chamber)

Iron pipes (empty in the center and hundreds of small air holes on the surface)

2. Iron pipe support ring Install and weld several pieces in front and middle of the steel pipe to fix the steel pipe and support the pipe to prevent sagging.

3. Iron pipe connector (air distributor)

4. Air supply pipe (about 3 times the thickness of the iron pipe)

5. blower

6. Air hole (Too much installation may result in a weak air pressure that does not reach the center of the flame.)

7. ------- ▶ Air Flow Chart

8. Boiler combustion chamber wall

9. Air (flame) leakage ring

※ a, b, c, d, e, f, air flow number sprayed in various directions

The present invention provides an air hole (6) on the surface of the iron pipe (1) of about 1/10 of the inner diameter of the combustion chamber and a length of about 7/8 of the length of the combustion chamber so that the combustion is carried out as much as possible in the boiler combustion chamber. ~ 8mm, 5/6 of the length of the iron pipe should be 3 ~ 10cm in the air life span, with the front of the iron pipe narrowing the air hole spacing and widening the back, and 1/6 should not be provided with the air hole (Fig. 5) The air supplied through the steel pipe barrel is heated to be supplied to the combustion chamber flame center, and the direction is penetrated through the center of the steel pipe (1), and the center is centered in the direction of 60 to 70 degrees on the left and right sides thereof. Drilled through and the surface facing the center of the combustion chamber (face facing the iron pipe) drilled two more rows of holes in the middle (see Fig. 4) to make a plurality of iron pipes 1 having hundreds of air holes 6 installed therein. Installed in the boiler combustion chamber, iron pie In order to support the pipe 1 slightly from the combustion chamber wall, several supporting rings 2, one third of the diameter of the steel pipe, are formed at the front and the middle of the iron pipe 1, and are less than the internal diameter of the combustion chamber. 1 to 2 cm smaller, a plurality of iron pipes (1) are welded and installed at appropriate intervals in the support ring, and then connected to the iron pipe connecting pipe (3) so that air can be supplied thereafter, and behind the steel pipe connecting pipe (3) Install an air supply pipe (4) that is about three times the thickness of the pipe, and install a ring of about 3cm in width to prevent flame leakage at the position in contact with the boiler combustion chamber cover in the middle, and terminate the air supply pipe (4) end to the outside of the combustion chamber. In order to install, make a hole about 1Cm larger than the outer diameter of the air supply pipe in the rear cover of the boiler combustion chamber, the outer end is provided with a blower (5), to supply the outside air in the combustion chamber flame center and the flame in various directions.

The air a, b, ejected from the air hole 6 of the iron pipe facing the boiler combustion chamber wall is ejected in all directions on the boiler wall (bucket wall) (see Fig. 1) to block the blocking film with heated air on the boiler wall. If an incompletely burned flame is directly cut off before heating the boiler combustion chamber wall surface (bucket wall) and allowed to burn to the maximum, the incompletely burned flame loses heat while heating the combustion chamber wall (bucket wall) It is converted into the combustion chamber wall and prevents it from sticking to the combustion chamber wall (bucket wall), and the carbon dioxide generated as the fuel burns surrounds the flame, forming an invisible curtain to block the air, so that only a part of the supplied air is supplied into the flame. Is incompletely burned due to lack of air, but the air supplied to the additional external air supply device according to the present invention is directed toward the flame direction. The air d, e, f, supplied through the air hole 6 in the air passes through the curtain formed by the carbon dioxide generated during combustion, and is supplied as an arrow [FIG. 1] in various directions in the center of the flame and the interior of the flame, resulting in incomplete air shortage. Incompletely combusted fuel particles that have not been combusted in air d, e, f, and are not burned in the air d, e, f, meet with air c, which is supplied to the spark surface, to be combusted again. The particles meet the air blocking membrane formed by the air a, b, which is blown toward the boiler combustion chamber wall (bucket wall) and spreads in all directions to the combustion chamber wall, causing the combustion to be repeated again, so that the combustion occurs to the maximum (the light that burns Changes in light color) combustion temperature rises, dust is greatly reduced (no combustion when complete combustion), and therefore rarely occurs To reduce the number of pipe cleaning in the inner wall of the boiler combustion chamber and the water tank, to solve the pollution problem that causes environmental pollution and air pollution, and to save fuel due to the thermal efficiency as the combustion temperature rises, and to prevent the environmental pollution caused by soot and dust. For this reason, there is no need for a pollution prevention facility (except for desulfurization), which can reduce operating costs and fuel costs.

Claims (2)

In the boiler combustion chamber, there are many iron pipes with spaces inside which are installed hundreds of air holes, and the steel pipes in the front and middle part can be spaced and supported about 1/3 of the steel pipe from the boiler wall. Consists of a support ring for fixing the pipe, an iron pipe connection pipe, an air supply pipe for supplying air to the iron pipe connection pipe, and a blower for supplying external air to the end of the flame. Additional air supply to the boiler combustion chamber, which supplies additional external air in various directions to maximize the combustion temperature to increase the combustion temperature, greatly reduce the smoke and dust, reduce the operating cost of pollution prevention facilities, and save fuel. delete