Dry desulfurization spray nozzle

Abstract

The invention discloses a dry desulfurization spray nozzle, comprising a wind spraying pipe. A rear end of the wind spraying pipe is a wind port; the wind port is connected to a wind source; the wind spraying pipe is a conical pipe with the diameter of the rear end larger than that of the front end; and the front end of the wind spraying pipe is provided with a wind spraying port. An inner diameter of the front part of the spray nozzle is smaller than that of the rear part of the spray pipe, thereby achieving relatively far spraying distance and spraying range under relatively small wind pressure and wind volume. The upper part and the rear part of the spray nozzle are provided with flanges which can be connected to different wind sources. Primary wind or secondary wind can be selected as the wind source to adapt different load of the boiler, according to different actual operation conditions of a circulating fluidized bed boiler. The spray nozzle is made of ZG4Cr26Ni6Mn3NRe and is wear-resistant and high temperature resistance, thereby having long service life.

Description

technical field [0001] The invention relates to an auxiliary device for dry desulfurization of a circulating fluidized bed boiler, in particular to a dry desulfurization nozzle. Background technique [0002] The dry method of calcium injection desulfurization of the circulating fluidized bed boiler is usually connected to the furnace with a nozzle, and the structure of the nozzle is mostly a straight tube. The desulfurization agent sprayed into the furnace—the mixing degree of calcium powder and fuel directly affects the efficiency of dry calcium spray desulfurization of circulating fluidized bed boilers. High wind speed or large air volume, and the need to arrange multiple nozzles at the same time will increase the energy consumption of the equipment and the desulfurization efficiency is poor; at the same time, the commonly used dry desulfurization nozzles are not suitable for high temperature resistance and wear resistance. Once the boiler is running If it is damaged in t...

AI Technical Summary

Problems solved by technology

The desulfurization agent sprayed into the furnace—the mixing degree of calcium powder and fuel directly affects the efficiency of dry calcium spray desulfurization of circulating fluidized bed boilers. High wind speed or large air volume, and the need to arrange multiple nozzles at the same time will increase the energy consumption of the equipment and the desulfurization efficiency is poor; at the same time, the commonly used dry desulfurization nozzles are not suitable for high temperature resistance and wear resistance. Once the boiler is running If it is damaged, the furnace must be shut down and replaced, resulting in certain economic losses.

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