High efficiency circulating fluidized bed coal fired boiler coal economizer

Abstract

The invention discloses a high efficiency circulating fluidized bed coal fired boiler coal economizer, which consists of an upper level coal saver, a SCR catalyst structure and a lower level coal saver that are connected from top down in a boiler. The upper level coal saver includes an upper level coal saver outlet connection box, an upper membrane type coal economizer pipe and an upper level coal saver inlet connection box. The lower level coal saver consists of a lower level coal saver outlet connection box, a lower membrane type coal economizer pipe and a lower level coal saver inlet connection box. The upper level coal saver outlet connection box is connected to a waterway of the lower level coal saver outlet connection box through a pipeline 1 and a pipeline 2. A height position of the SCR catalyst structure in the coal economizer is also provided with a denitration area inspection door bended pipe, wall enclosure pipe pieces are disposed around the denitration area inspection door bended pipe, several soot blowing bended pipes and several measure point bended pipes are arranged between the wall enclosure pipe pieces and the denitration area inspection door bended pipe. The coal economizer provided by the invention reduces the Nox emission of the boiler, reduces environmental pollution, has high environmental protection performance, and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of an economizer for a 75t / h circulating fluidized bed coal-fired boiler, in particular to an economizer for a high-efficiency circulating fluidized bed coal-fired boiler. Background technique [0002] Circulating fluidized bed boiler technology is a high-efficiency, low-pollution and clean combustion technology that has developed rapidly in the past ten years. Internationally, this technology has been widely used commercially in the fields of power station boilers, industrial boilers and waste treatment and utilization, and is developing towards large-scale circulating fluidized bed boilers with a scale of hundreds of thousands of kilowatts; domestic research and development in this area And applications are also gradually emerging, and hundreds of circulating fluidized bed boilers have been put into operation or are being manufactured. [0003] The boiler adopts a single drum and natural circulation mode,...

AI Technical Summary

Problems solved by technology

However, the existing 75t / h circulating fluidized bed coal-fired boiler has problems such as high NOx emissions after the boiler is put into operation, which does not meet the relevant environmental protection indicators and requirements, so it needs to be improved

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