一、前言目前国内生产的小型工业链条炉,绝大多数都是快装形式,而其拱型设计一般都是沿用标准推荐的拱型——即较短的前拱,加低而长的后拱。这种标准拱型对快装锅炉来说,有两个明显的缺点:一是因为快装锅炉受运输界限尺寸的限制炉膛高度比较低,采用了低而长后拱,使燃烧室变得更小,这不仅使辐射受热面利用率低,而且有碍於可燃气体的燃尽,因此 I. INTRODUCTION At present, most of the small-scale industrial chain furnaces produced domestically are in the form of quick-loading. However, the arched design generally follows the standard arch pattern - that is, the shorter front arch and the lower and longer rear arch. This type of standard arch has two obvious drawbacks for a quick-loading boiler: First, because a fast-moving boiler is limited by the shipping limit size, the furnace height is relatively low, and the low and long rear arch is used to make the combustion chamber more Small, which not only makes low utilization of radiation heating surface, but also hinder the burning of combustible gases, therefore