近年来新造装有独立采暖锅炉的22、23型客车、占现有客车总数的比重很大。在锦局以煤为燃料的采暖锅炉占该局保有客车总数的47%。对于装有以煤为燃料的独立温水采暖的锅炉,在采暖期间入库后只能压火,不能灭火,在压火期间,锅炉烟囱仍然要冒出许多煤烟,由于烟雾弥漫,呛人,致使检修作业人员难于工作。 In recent years, newly built 22 and 23 buses with independent heating boilers make up a large proportion of the total number of existing buses. The coal-fired heating boilers at Brilliance accounted for 47% of the total number of buses maintained by the bureau. For coal-fired boilers with independent warm water, they can only be pressured during the heating period and can not be extinguished. During the firing period, the boiler chimney still emits many soot because of smog and choking, As a result, maintenance workers are hard to work with.