1000 MW ULTRA-SUPERCRITICAL PARAMETER CIRCULATING FLUIDIZED-BED BOILER

摘要

Provided is a 1000 MW ultra-supercritical parameter circulating fluidized-bed boiler, comprising a furnace chamber (1), a cyclone separator (2), and a standpipe (3) and material-feedback apparatus (4) connected to the cyclone separator solid-state outlet and the furnace chamber; the cyclone separator (2) consists of a columnar section (21) at its top and a conical section (22) at its bottom; the furnace chamber (1) is enclosed by four water walls, and comprises, in sequence along the direction of flow of smoke, a separator-outlet horizontal smoke channel (5), a separator-outlet smoke channel to a tail-part vertical-shaft connecting smoke channel (6), and a tail-part vertical shaft (7); the furnace chamber (1) employs a structure of a single furnace chamber and multiple air-distribution plates or a structure of a ring-shaped furnace chamber and a ring-shaped air-distribution plate, the quantity n of air-distribution plates of the single furnace chamber and multiple air-distribution plates being n≥2; the ratio of the height H of the material-feedback apparatus running along the material-return opening of the furnace chamber to the furnace roof to the total height h of the separator is H/h≥2; the quantity of cyclone separators is not less than 8, and are divided into two groups of center symmetrical arrangements arranged around the center of the furnace chamber or axially symmetric arrangements along the axis of symmetry of the furnace chamber. The invention implements a 1000 MW ultra-supercritical circulating fluidized-bed boiler having different steam parameters and using different fuels.