Patent GB-945724-A (GB)
Title: Improvements in or relating to gas passages for leading gas from converters
Inventor: EVANS RICHARD HENRY
IPC: C21C5/40
Filed: 1961-05-29
Abstract: 945,724. Converter chimneys. BABCOCK & WILCOX Ltd. Aug. 29, 1962 [May 29, 1961], No. 19385/61. Headings F4B and F4J. A passage 5 for conveying gases from a converter 1 to gas cleaning means (not shown) is of generally rectangular cross section and has cooling tubes lining the walls, one of the walls 15 having its lower part formed as a door 16 and the cooling tubes in the door being connected to the cooling tubes in the wall 15 so that the connection is not broken when the door is opened. The door 16 provides access to the converter for relining and has a header 19 which is mounted in bearings 24 (Fig. 3) on which the door swings and which is divided by a partition 25 into two parts 19a and 19b each of which is connected to a collector header 20 in the door by two sets of tubes forming panels 17 and 18. Water is introduced into the cooling system from a cylinder 23 formed as an extension of a header 15b at the lower end of the wall 15. The cylinder 23 is connected to the door header 19a by two sets of three resilient metal conduits 22a, 22b and 22c which are joined to the cylinder 23 at equally spaced points around its circumference (Fig. 4), encircle the header 19a twice and are joined to the header 19a at equally spaced points around its circumference in the same plane as the joints with the cylinder 23. Conduit 22a lies entirely in this plane and the major parts of conduits 22b and 22c are deflected to either side of the plane. Water from the door header 19a passes through the door as indicated by arrows on Fig. 3 and passes to the stationary wall header 15b through two sets of conduits 21 similar to conduits 22. From header 15b water passes up the tubes lining the wall 15 to a header 15a. Portions of alternate tubes at the upper part of wall 15 are displaced to provide a gas exit from the passage 5 to the gas cleaner. Each of the other three walls of the passage 5 has a set of cooling tubes connecting lower and upper headers, and from these upper headers and from header 15a water passes to a heat exchanger (not shown) to be cooled and is recirculated thence to the door 16 via the cylinder 23 and the lower headers of the other three walls. An expansion drum (not shown) is included in the coolant circuit and contains gas at approximately 200 lb/square inch to prevent the water boiling. The upper end of the passage 5 is closed by a counter balanced damper 5b at the top of a refractory wall 5a to provide an emergency escape to atmosphere if the pressure in the passage 5 should become excessive. A portion 7 of the passage 5 is inclined to the vertical, Fig. 2 (not shown), to allow a lance to be inserted into the converter through a sleeve 10 on the passage 5. Spouts 11 fitted with non-return valves are provided for charging the converter and tubes are provided for circulating coolant around the sleeve 10 and spouts 11. Air ports may be disposed above the spouts 11 for the supply of air to burn carbon monoxide in the converter gases. In a modification (not shown) the door header 19 is displaced from the axis of rotation of the door. In a further modification (not shown) the resilient conduits 21 and 22 are omitted and the loss header 19 is connected by fluid tight glands to fixed headers communicating with the coolant supply and with the wall header 15b.