CHANGE-OVER VALVE, AND REGENERATIVE COMBUSTION APPARATUS AND REGENERATIVE HEAT EXCHANGER USING SAME

摘要

In order to realize in a continuous operation efficient heat decomposition and purification of a gas to be treated, which contains bad-smelling substances, with a large-sized and heavy heat reserving material (53) in a stationary condition, the gas to be treated is supplied to a chamber (65) of a change-over valve (51) to be conducted from a guide space (91) through first moving valve ports (86, 87) of a moving valve member (69) and a stationary valve port (82) of a stationary valve member (71) to a plurality of passages (84, 113-120), which are compartmented by partition plates (55) in a housing (52) and contain therein the heat reserving material (53), a pretreatment material (141) and a catalyst (54), to undergo endothermic reaction for heat decomposition of the bad-smelling substances by means of the catalyst (54) and a burner (59), the gas being treated then having its heat reserved through the heat reserving material (53), so that a purified gas is taken out from the stationary valve port (82) and second moving valve ports (88, 89) through a chamber (66). A third moving valve port (90) is provided to prevent the gas being treated from being mixed with the purified gas. A change-over section (138) is provided to instantaneously perform change-over of gas flows through the plurality of passages (84, 113-120), thereby improving an efficiency of operation.