JPH0125880Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to an apparatus for deodorizing exhaust gas accompanied by a foul odor which is emitted when metal scrap is preheated.

[Prior art and its problems] Conventionally, all or part of the high temperature exhaust gas discharged from the exhaust gas port of an arc furnace is guided into a preheating chamber to preheat the metal scrap to be melted in the arc furnace. A scrap preheating device is known. However, in such scrap preheating equipment, if the metal scrap to be preheated is contaminated with oil or synthetic resin, the foreign matter will be incompletely combusted and a foul odor or white smoke will be generated during preheating, which will then be released into the atmosphere. It was believed that pollution would become a problem if released into the world.

[Purpose of the invention] Therefore, the present invention aims to provide an exhaust gas deodorizing device with a simple structure that can be placed in the middle of the flue of the exhaust gas discharged from the scrap preheating device.

[Means for achieving the object] In order to achieve the object, the exhaust gas deodorizing device of the present invention has burner tubes disposed in a radially expanding shape on the cross section of the flue, and the side wall of the entire burner tube. A large number of small flame holes are opened at regular intervals in the flue, and a baffle plate with radial ventilation holes formed in accordance with the overall shape of the burner pipe is provided at a position upstream of the burner pipe in the flue to pass through the flue. This is characterized in that the exhaust gas is guided around the burner tube.

[Function] The exhaust gas flowing in the flue is guided by the baffle plate and passes through the space around the burner tube, so during that time it is caught up in the flames blowing out from the many flame holes provided in the burner tube, and the odorous components in the exhaust gas are incinerated. be done.

[Example] The drawings show an exhaust gas deodorizing device according to an example of the present invention. In the figure, reference numeral 1 denotes a cylindrical flue through which exhaust gas flows in the direction of the arrow, and a heat storage material (caster) 2 is uniformly stretched around the inner peripheral surface of the flue. 3 is a radial (cross-shaped in this case) burner tube arranged on the cross section of the flue, and the entire burner tube has small flame holes 4, 4, 4... at regular intervals on the side wall. Many have been established. 5, 5, 5... are baffle plates made of a plurality of pieces provided slightly upstream of the burner pipe 3 so as to protrude from the inner wall of the flue 1, and the baffle plates are shaped according to the overall shape of the burner pipe 3. A cross-shaped ventilation hole 6 is formed in accordance with the above.

For this reason, the exhaust gas discharged into the flue 1 from the scrap preheating device (not shown) is transferred to the baffle plates 5, 5,
The passage is restricted by 5... and guided into the space surrounding the burner tube 3. The burner tube 3 blows flame around it from the flame holes 4, 4, 4, . . . and entrains the exhaust gas led into the surrounding space, so that the malodorous components of the exhaust gas are incinerated and released into the atmosphere.
Although this example used a cross-shaped burner tube,
The burner tube is not limited to this shape, but may have other shapes that extend over the cross-section of the flue.

[Effect of the invention] The burner tube is arranged in an expanded shape on the cross section of the flue so that the exhaust gas comes into contact with and gets caught up in the small flames blown out from the burner tube, so the combustion amount of the burner tube is low. It can also deodorize large amounts of exhaust gas. In other words, the exhaust gas passing through the flue can be uniformly brought into contact with the erupting flame, which has the advantage of requiring less combustion in the burner tube, and the running cost is also low, making it very useful in practice due to its simple structure. It is. Note that the exhaust gas expands significantly after the burner tube due to contact with the erupting flame, but in this invention, a baffle plate is provided at the upstream position of the burner tube where the exhaust gas has not yet expanded, so this is used to guide the exhaust gas. Even if a baffle plate is provided, there is no risk of impairing the ventilation of the flue and adversely affecting exhaust gas.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a transverse sectional view. 1... Flue, 3... Burner pipe, 4... Flame hole,
5... Baffle board, 6... Ventilation opening.

Claims (1)

[Scope of utility model registration request] A burner tube that expands radially on the cross section of the flue is arranged, and a large number of small flame holes are opened at regular intervals on the side wall of the entire burner tube, and a burner tube is provided at a position upstream of the burner tube in the flue. An exhaust gas deodorizing device characterized in that a plurality of baffle plates are provided so that radial ventilation holes are formed in accordance with the overall shape of the burner tube, and the exhaust gas passing through the flue is guided around the burner tube. .