300MW circulating fluidized bed boiler island

Abstract

The invention discloses a 300MW circulating fluidized bed boiler island device; the boiler of the invention adopts the circulating fluidized bed profile, limestone powders are added in the boiler and combusted at the temperature of 840 DEG C to 950 DEG C; the boiler comprises a separator, a material return system, a first-level raw coal crushing system, a second-level raw coal crushing system, a first-level coal feeder, a second-level coal feeder, an air-water combined fluidized type cold slag apparatus, a mechanical dry type slag removing system, a deoxidizing chamber and a coal bunker, wherein an outlet of the second-level coal feeder is provided with a helical type dispenser; the deoxidizing chamber and the coal bunker adopt the combination single frame arrangement, the deoxidizing chamber is provided with a built-in deaerator; the invention has the advantages of high efficiency, environmental protection, cleanliness, smooth slag removal, safety, reliability and high efficiency and energy save of the equipment; moreover, the coal feeding system is not blocked, all environmental protection emitting values of the boiler operation reach or exceed the National Environmental Protection Emission Standard, the main workshop arrangement of the invention is optimized, compact and reasonable, which meets the requirements of the production operation and the maintenance and the whole project is low in investment.

Description

Technical field: [0001] The invention belongs to the technical field of a 300MW circulating fluidized bed boiler power generation engineering device. Background technique: [0002] In today's electric power composition, especially in my country, coal power will still dominate for a long period of time, and the SO 2 Pollution has become a prominent environmental protection problem and seriously restricts the development of thermal power. With the strengthening of environmental protection, the limitation of SO 2 , NO X The emission of harmful gases such as carbon dioxide and CO is imminent. The circulating fluidized bed boiler can not only desulfurize but also denitrify, and can also inhibit the formation of CO. The thermal efficiency is one of the main directions of clean coal combustion technology at home and abroad. [0003] Before the invention of this device technology, the domestic 300MW circulating fluidized bed boiler power plant had no design, manufacture and oper...

AI Technical Summary

Problems solved by technology

[0004] First, the wear and tear of the boiler is serious, resulting in a short operating cycle, frequent and long maintenance and overhaul, and low availability

[0005] Second, the combustion efficiency of the boiler is low, basically lower than 90%, and the economy is poor

[0006] Third, the slag discharge of the boiler is not smooth, which is prone to blockage, resulting in reduced load operation of the boiler, and even shutdown of the boiler in serious cases

[0007] Fourth, various environmental protection emission values ​​of boilers (SO 2 , NO X etc.) fail to meet environmental protection emission requirements and cause serious pollution

[0008] Fifth, the raw coal bunker and the coal feeding system of the boiler are prone to blockage, and the coal feeding is not smooth. At the same time, there is uneven coal feeding at each coal feeding point, which affects the normal combustion operation of the boiler

[0009] Sixth, there are unreasonable situations such as poor economy and large noise pollution in the design of boiler auxiliary equipment

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