Patent GB-190408492-A (GB)
Title: Improvements in or connected with Gas Purifiers
Inventor: HODGE JOHN
Filed: 1904-04-13
Granted: 1905-04-13
Abstract: 8492. Hodge, J. April 13. Purifiers.-Relates to tower gas purifiers in which the purifying-material is supported on grids of special construction and may be kept in an open or porous condition by means of rotating arms mounted on a central axis when a circular form of purifier is employed. Fig. 1 shows a pair of purifiers fitted with grids and rotating arms, Figs. 2 and 6 show different forms of grids, and Fig. 3 shows a detail of the bearings. Gas passes into the purifiers from the inlet L through an opening B, and is emitted from the outlet O. The purifiers are charged from a hopper R<3> provided with a movable partition R<6> to direct the flow of material; which passes into each purifier through a three-way shoot N. The charging-doors A<1> are kept in place when shut by cross-bars M<1>, and are luted with clay or lime. The discharging-doors M are also kept shut by cross-bars and clips M<2>, A central shaft R rotated by a wheel A carries arms E<2> screwed into blocks S<1> and having upright crosspieces E<3>. Just above the discharging-doors, arms T having uprights G rotate, and at the top of the purifier rotating arms D having short uprights H<4> are arranged to serve as levellers for the material. The grids W, shown in Figs. 1 and 2, comprise stationary parts Z, having gas passages K<1>, which are mounted on spindles S. The inner spindles enter a fixed block H supported by cross-pieces F through which the shaft R passes, while the outer spindles pass through the wall of the purifier and are hollow. The outer spindles carry handles E which enable the grids to be bodily rotated from the outside. Sliding parts K carrying vertical rods B<2> can be moved over the fixed parts of the grids to clear the gas passages and render the material porous. These sliding parts are connected by nuts V to a spindle P, which passes through the hollow spindle S, and can be moved in or out by a handle E<1>. In Fig. 2, two of the grids are shewn in the normal working-position and two turned through 90‹ into the discharging-position so as to allow the material to fall. In the form of grid shown in Fig. 6, the sliding parts X, as well as the fixed parts Y, have gas passages and can be moved relatively to the fixed parts, as shown in the Figure, so as to leave openings C through which the purifying- material can fall. The grids are supported by the spindles S, and the sliding parts are actuated by a handle E and screwed rod P<1> passing through the hollow spindle S screw-threaded in the interior. The sliding parts are attached to the rod P' by nuts V, and work over supports U which are kept clear of the purifying-material by the bevelled front and back edges of the sliding parts. Short vertical rods H<1> are employed to clear the gas passages when the sliding parts are moved. The gas passages have an inverted V-shaped section. A shield L is employed to protect the bearings of the shaft at the point where is passes through the fixed block H. A block H<1> rotates with the shaft over the block H. Grids similar in construction to those shown in Fig. 6 may be used in a square form of purifier constructed without a central rotating shaft. To keep the material in a loose condition in this form, horizontal rods having cross-pieces carrying vertical arms, can be worked through the material from the outside of the purifier, the rod being either plain or screwed where it passes through the wall of the purifier. The inner ends of the rods work along stays or supports in the interior of the purifier. The Provisional Specification describes baffles which are arranged above the grids to prevent too great a pressure of the material and to cause the gas to take a tortuous course. The rotating arms in this case are arranged to move over the surface of the baffles. When the grids shown in Fig. 6 are used, a scraper may be employed to keep their upper surfaces clear. The Provisional Specification also describes a form of purifier in which a conical part is formed below the grids to act as a receiver for the spent material before it is discharged from the purifier. The top of the purifier has an enlarged part, connected to the lower portion by a conical portion sloping at an angle of about 40‹.