Circumferential injection burner

A burner for delivering pulverous feed material and reaction gas to a reaction vessel comprises an outer, elongate tubular member having a peripheral wall. An upper end of the outer tubular member defines a gas supply channel for receiving the reaction gas; a lower end defines a mixing chamber for the reaction gas and the feed material; and an intermediate portion located between the upper and lower ends may have at least one aperture through its outer peripheral wall for receiving the feed material. The burner may comprise an adjustable disperser located inside the outer tubular member and extending from the upper end to the lower end of the outer tubular member. An inner tubular member may be located inside the outer tubular member to define an outer annular passageway, and a valve may be provided for controlling an area of an annular opening of the outer passageway. 种燃烧器，其用来向反应容器进给粉状进料和反应气体，该燃烧器包括外部细长管状构件，外部细长管状构件具有周界壁。外管状构件的上端限定用于接纳反应气体的气体供应通道；下端限定用于反应气体和进料的混合腔室；并且位于上端与下端之间的中间部分可以具有穿过其外周壁的至少个孔口，以接纳进料。燃烧器可