Cyclone separator of circulating fluidized bed boiler with double eccentric central cylinders

Abstract

The invention discloses a cyclone separator of a circulating fluidized bed boiler with double eccentric central cylinders. The cyclone separator comprises a separator cylinder body, a separator conical body and a separator vertical pipeline which are communicated in sequence from top to bottom, the side part of the separator cylinder body is communicated with an inlet flue; the connecting part between the bottom of the inlet flue and the separator cylinder body is sunken inwards to form a smoke tail end accelerating opening; the double eccentric central cylinders are inserted into the top of the separator cylinder body. According to the cyclone separator of the circulating fluidized bed boiler with the double eccentric central cylinders, the separating efficiency of the cyclone separator is improved; the material circulating manner is optimized; the material concentration in a furnace hearth is improved; the bed temperature of a dense phase area of the boiler is reduced; the emission concentration of SO2 and NOx is reduced; the environment friendliness and economy of operation of the circulating fluidized bed boiler are improved; the cyclone separator of the circulating fluidized bed boiler with the eccentric central cylinders is suitable for integrated modification of newly-built machine units and on-service machine units.

Description

technical field [0001] The invention belongs to the technical field of circulating fluidized bed boilers, and in particular relates to a cyclone separator for circulating fluidized bed boilers with double eccentric central cylinders. Background technique [0002] The separator is one of the key components of the circulating fluidized bed boiler. Its main function is to separate a large amount of high-temperature solid materials from the air flow and send them back to the furnace to maintain the rapid fluidized operation of the furnace. Ensure multiple cycles of fuel and desulfurizer, which provides conditions for prolonging the residence time of coke particles and desulfurizer. [0003] The circulating fluidized bed boiler separator must meet several requirements: (1) It can work normally at high temperature; (2) It can separate the high-concentration particle-carrying airflow, and the solid particle concentration at the separator inlet reaches 0.5-5kg / m 3 ; ⑶ has a lower r...

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Problems solved by technology

[0004] Judging from the actual use of circulating fluidized bed boilers in China, problems such as high carbon content in fly ash caused by low separation efficiency and insufficient circulating ash affect boiler operation often occur. Some boiler fly ash carbon content is as high as 5%~ 20%, limestone calcium sulfur molar ratio as high as 4 to 8

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