Improvements in or relating to kilns for burning clay products, glazed ware and pottery

摘要

291,482. Webster, H. Jan. 27, 1927. Pottery and like kilns; multiplechamber kilns.-In a pottery or like kiln, of the kind having around its periphery two series of fireplaces serving to fire the kiln with updraught and downdraught respectively, only one series is in operation at a time, the gases from that series passing through the whole of the contents of the kiln. In the right-hand kiln shown in Fig. 2, the gases from the downdraught fireplaces a pass over the bag wall d and through the perforated floor e into the well f; the left-hand kiln shows the updraught fireplaces b which alternate with those of the other series a and deliver the gases upwardly through the floor e into the kiln, whence they pass downwardly behind the wall d to an annular flue h. Fig. 3 shows part of a battery of kilns connected for continuous work- .ing, dampered flue connections being provided so that the waste gases from any kiln, whether working with updraught or downdraugbt, may be passed to any other kiln or kilns of the series or to driers &c. The gases from the right-hand downdraught kiln shown in Fig. 2 pass from the well f through an opening n into a longitudinal flue m running the whole length of the battery and fitted with dampers i, by suitable manipulation of which the gases may be caused to pass in either direction and upwardly into the adjacent kiln. If the dampers i between the kilns be closed, the gases pass from the flue m into the cross-flues o, from which, by operating suitable dampers, they can be caused to pass direct to a chimney k, into a flue p, and thence to any kiln of the series, or into a waste-gas flue q leading to driers or other waste-heat utilizing apparatus. Similarly, the waste gases from a kiln working with updraught pass from the flue h of that kiln through a connection l to the flue h of the adjacent kiln, from which they pass into the longitudinal flue m and thence directly to the next kiln or into the cross-flues o as desired. The invention is also applicable to muffle-heated kilns for firing terra-cotta or other ware with which contact of combustion gases is not desirable. Specification 269,344 is referred to.