Annular furnace circulating fluidized bed boiler with multiple separators

Abstract

A circulating fluidized bed boiler with an annular furnace, comprising: a furnace; two sets of cyclone separators, respectively arranged on the outside of two side walls, each set of cyclone separators has three cyclone separators, the cylinder structure of each cyclone separator and The dimensions are all the same, where: in the plane across the center points of all furnace flue gas outlets, the center points of the furnace flue gas outlets of the two outermost separators of one set of separators are the same as the outermost two separators of the other set of separators The center point of the furnace flue gas outlet of the two separators is symmetrical about the intersection point of the furnace center plane perpendicular to the first side wall and the furnace center plane perpendicular to the second side wall; the outermost two of each set of cyclone separators The center point of the furnace flue gas outlet of each separator is axisymmetric to the furnace center line formed by the intersection line between the furnace center plane perpendicular to the first side wall and the plane; and the two outermost cyclone separators of each set of cyclone separators The positional relationship of the location satisfies: when b≤2m, b / 3≤a<b-0.3m; when b>2m, m / 2≤a<b-0.3m.

Description

technical field [0001] The invention relates to the technical field of circulating fluidized bed boilers, in particular to the arrangement of cyclone separators of circulating fluidized bed boilers. Background technique [0002] Since the circulating fluidized bed combustion technology was applied in the field of power generation, it has been developing in the direction of large capacity and high parameters. While the capacity and parameters of the circulating fluidized bed boiler are enlarged, in order to ensure the separation efficiency, the size of the cyclone separator cannot be increased synchronously with the size of the furnace, so the parallel arrangement of multiple cyclone separators is a commonly used structure for large circulating fluidized bed boilers form. However, the gas-solid two-phase flow in a circulating fluidized bed with multi-cyclone separators belongs to the problem of multiphase flow in parallel channels. Both the literature reports and the actual ...

AI Technical Summary

Problems solved by technology

However, due to the existence of the water-cooling column, the distribution of the gas-solid flow field in the furnace is changed, especially for the two separators located in the middle of both sides of the furnace. Gas-solid circulation between vessels is weakened

The multi-separator layout plan summarized in the development of the circulating fluidized bed boiler with a rectangular upper section of the furnace is no longer applicable to the circulating fluidized bed boiler with this structure

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