JPH0144905Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas combustion furnace that efficiently and completely burns combustible gas and has a function of collecting dust. Conventionally, combustible gases containing trace amounts of organic substances, malodorous substances, etc. are burned, and after removing conditions that degrade the environment, the temperature is lowered and dust removed as necessary, and the gases are released into the atmosphere. At this time, combustion is usually performed using a burner, but since the concentration of flammable components in these gases is generally low, complete combustion is difficult to occur, and releasing them directly into the atmosphere poses environmental problems. .

In view of the above circumstances, the present invention is capable of completely combusting gas containing relatively low combustible components, removing a considerable portion of dust, etc. contained in the gas, and having a long lifespan for the metal furnace body. The purpose of the present invention is to provide a gas combustion furnace in which the combustion tube can be easily replaced.

In order to achieve the above object, the present invention consists of a lower cone-shaped part having a dust extraction port and an air inlet, and an upper cylinder having a central axis longer than the lower cone-shaped part and provided with a heater on the outside. A lid body having a combustion gas exhaust port is detachably attached to the upper end of a metal furnace body consisting of a shaped part, and a combustion tube is attached to the lid so as to be in communication with the combustion gas exhaust port. A flammable gas is inserted concentrically with the upper cylindrical part and with a preheating gap between the upper cylindrical part, and a combustible gas is inserted into the upper part of the upper cylindrical part tangentially to the upper cylindrical part. The structure is provided with a gas inlet.

The present invention will be explained in detail below with reference to the drawings.

The drawing shows an embodiment of the gas combustion furnace according to the present invention, and reference numeral 1 in the drawing indicates a furnace body made of heat-resistant steel.
The furnace body 1 has a cylindrical shape with a cone-shaped lower part.
A heater 2 is provided on the outer periphery of the cylindrical portion 1a. The outside of the heater and the lower cone-shaped portion 1b of the furnace body 1 is covered with a heat insulating material 3, and an exterior plate 4 made of a steel plate is attached to the outer peripheral surface of the heat insulating material 3 to protect the surface of the heat insulating material 3. ing. Further, the upper open end 1c of the furnace body 1 is provided with a lid body 6 formed of an exterior plate 4' made of steel plate with a refractory heat insulating material 5 attached to the inner surface. Exterior plate 4' of this lid body 6
The lower edge of the furnace body 1 is a flange 6a.
It is removably connected to a cylindrical part flange 4a on the upper edge of an exterior plate 4 that covers a cylindrical part. Further, the upper end of a cylindrical combustion cylinder 7 made of a heat-resistant material is attached to the center of the lid 6 so as to pass through the lid 6. The combustion tube 7 is spaced apart from the cylindrical portion 1a of the furnace body 1 by an appropriate distance, is concentric with the cylindrical portion 1a, and has a lower end extending close to the lower end of the cylindrical portion 1a. . A combustion gas outlet 8 is provided at the upper end of the combustion tube 7, and a combustible gas inlet 9 is provided above the cylindrical portion 1a of the furnace body 1 in a tangential direction. Further, a dust outlet 10 is provided at the lower end of the cone-shaped portion 1b, and an air inlet 11 is provided at the side of the cone-shaped portion 1b.

As shown in the figure, the exterior plate 4 covering the outside of the cylindrical portion 1a and the cone-shaped portion 1b is formed of separate members, and can be connected and separated at the flange 12 and flange 12' provided on each member. However, it may be formed from an integral member.

The operation of the gas combustion furnace according to the present invention configured as above will be explained.

Combustible gas generated from a carbonization incinerator or the like for sludge, etc. is introduced from the inlet 9 and guided downward while swirling between the cylindrical portion 1a of the furnace body 1 and the combustion tube 7. During this time, the combustible gas is sufficiently preheated by indirect heating by the heater 2 transmitted through the furnace body 1 and heating by combustion inside the combustion tube 7. This preheated combustible gas is mixed with air introduced from the air inlet 11 and introduced into the combustion tube 7, so that the combustible gas is completely combusted inside the combustion tube.
At this time, if necessary, the air introduced from the air introduction port 11 is preheated. The burned gas is discharged to the outside from the exhaust port 8, and is further processed, such as cooling and dust removal, as required. Further, the ash produced by the combustion is taken out of the furnace through the dust outlet 10.

By the way, since this gas combustion furnace has a cyclone shape, even if relatively large dust particles are contained in the combustible gas, they are separated and collected by centrifugal force and are removed from the dust extraction port 10 along with the combustion ash. Since the amount of dust in the exhaust gas is significantly reduced, the burden of subsequent dust removal processing is reduced. In this case, if the air inlet 11 is also attached in the tangential direction like the inlet 9, the effect will be further improved. Further, there is a combustion tube 7 in the center of the furnace body 1 made of heat-resistant steel, and as a result of the introduced combustible gas passing through the preheating gap between the furnace body 1 and the combustion tube 7, the metal forming the furnace body 1 Since the parts do not come into direct contact with combustion gas, they are not exposed to extremely high temperatures, resulting in a relatively low and uniform temperature, resulting in less deterioration due to heat effects and a longer life. Furthermore, the combustion tube 7, which is the most easily damaged, can be easily replaced by removing the lid 6.

Note that this combustion furnace can also perform combustion deodorization treatment by mixing gaseous fuel with malodorous gas that does not contain combustible gas.

As mentioned above, the gas combustion furnace according to the present invention is
The flammable gas is passed through the preheating gap between the furnace body and the combustion tube, and is preheated from both sides by the heater installed on the outside and the combustion heat in the combustion tube. Since the liquid components contained therein are completely vaporized, gases with a relatively low combustible gas content can be completely combusted, and the metal furnace body has a dust collection function and has a long lifespan and is not easily damaged. Since the combustion tube is easily replaceable, it can be effectively used in many sectors that require combustion treatment of exhaust gas.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the gas combustion furnace according to the present invention. DESCRIPTION OF SYMBOLS 1...Furnace body, 1a...Cylindrical part, 1b...Cone-shaped part, 1c...Upper opening end, 2...Heater, 3...Insulating material, 5...Refractory heat insulating material, 6...Lid body , 7... Combustion tube, 8... Combustion gas exhaust port, 10
...Dust outlet, 11...Air inlet.

Claims (1)

[Scope of utility model registration request] The upper end of a metal furnace body, consisting of a lower cone-shaped part having a dust extraction port and an air inlet, and an upper cylindrical part with a longer center axis than the lower cone-shaped part and a heater provided on the outside. A lid body having a combustion gas exhaust port is detachably attached to the lid body, and a combustion tube is attached to the lid body so as to communicate with the combustion gas exhaust port, so that the combustion tube is concentric with the upper cylindrical part and the upper part. The flammable gas is inserted with a preheating gap between the upper cylindrical part and the upper cylindrical part, and a flammable gas inlet is provided in the upper part of the upper cylindrical part in a tangential manner to the upper cylindrical part. Gas-fired furnace.