Patent UA-97912-C2 (UA)
Title: DEVICE for intake of Converter GASES
Inventor: IVANETS VALERII HRYHOROVYCH
IPC: C21C5/38
Filed: 2011-04-12
Abstract: The invention relates to the field of ferrous metallurgy – in particular to the intake the hot converter gases formed in the production of the converter steel and can be used in the units of heat recovery of converter gases both with partial and with complete combustion. The device for the intake of converter gases includes a converter, reference node and cylindrical intake unit, the reference node is made in the form of a plane supporting ring and at least three guides, and cylindrical intake unit consists of joint one with another bottom, body and lining, and it is equipped with a removed, at that the plane bearing ring is fixed on the furnace mouth perpendicularly to its vertical axis, and at least three guides, that are designed to provide introduction of the intaken air into the lower part over the furnace mouth in the form of vertical rectangular flat plates, which are connected to the bottom of the cylinder intake unit, the bottom of the cylindrical intake unit is designed in the form of a flat ring, an inner diameter of which is greater than the outer diameter of the furnace mouth, and the external diameter is more than the outer diameter of the reference ring, which is fixed to furnace mouth, the body is made in the form of a vertical cylinder with a rectangular cutout in the bottom part of the joint of cylindrical intake unit with the tract for the intake of hot converter gases, at that the outer diameter of the body is equal to the outer diameter of the bottom of the cylinder intake unit, and the height of the body provides possibility for the formation over the furnace mouth of the space, sufficient for mixing of the formed converter gases and the intaken air, the lining for thermal insulation of the flows of hot converter gases is placed inside the body and on the bottom of the cylinder intake unit, and it is made in the form of a torus of rectangular cross section with an internal diameter greater than or equal to the outer diameter of the furnace mouth with an external diameter equal to the outer diameter of the bottom cylinder intake unit, and with a height equal to the height of the body of the cylindrical intake unit, which is made of refractory bricks or other heatproof material formed with holes in its body, with the collector and channel, at that they are in the quantity intended for the intake of the mixture of converter gases and intaken air from the space over the furnace mouth, the holes and their diameter are chosen from the condition that the average speed of the gas mixture in the cross sections of the holes was less than the average speed of the gas mixture in the reservoir cross section, i.e. the geometric dimensions of the collector are selected from the calculation that the average speed of the gas mixture in the reservoir cross section was more than the average speed of the gas mixture in cross sections of holes, and the geometrical dimensions of the channel are selected from the calculation that the average speed of the gas mixture in the cross-section of the channel was more than the average speed of the gas mixture in the reservoir cross section, but less than the average speed of the gas mixture in the cross section of tract for the intake of the converter gases; the removed cover, consists of the body, guides, basis and ring-bolts, at that the body of the cover is made in the form of a flat ring, the outer diameter of which is equal to the outer diameter of the bottom of the cylinder intake unit, and the inner diameter of which is equal to the inner diameter of the bottom of the cylinder intake unit, the guides of the cover designed for tangential introduction of the intaken air into the space above the furnace mouth, and are made in the form of rectangular flat or curved plates, fixed vertically between the body of cover and the main cover, and the height of the cover guide is calculated on grounds of providing a fixed air intake with minimum gas-dynamic resistance of the body design to the intaken air flow, the basis of the cover is made as a flat ring, the outer diameter of which is equal to the external diameter of the bottom of the cylindrical intake unit and the inner diameter is equal to the inner diameter of the bottom of the cylinder intake unit with the two pairs of flat plates welded facing each other, which plates form a gap for the eyelet. The invention provides a cooling of the upper and lower parts of the cylinder intake unit with intaken air, and also creating in the top part of the cylindrical unit of the conditions for vortex motion of the intaken air. The expected technical result of the applied technical solution (unit for the intake of the converter gases) is to simplify its structure by creating opportunities for cooling of the upper and lower parts of the cylinder intake unit with the intaken air, and also creating conditions for vortex motion of the suction air in the top part of the cylindrical unit.