Anthracite large oxygen-enriched combustion system and method with novel direct blowing powder production device

Abstract

The invention provides an anthracite large oxygen-enriched combustion system and a method with a novel direct blowing powder production device for realizing an anthracite high-volume (600 MW and above) tangential firing mode or a wall firing mode. When the direct blowing powder production system is adopted, the wind powder temperature of primary wind is low; and the system optimizes the wind powder airflow of the primary wind, and improves the ignition characteristic. The firing mode realizes CO2 emission reduction, radically reduces emission of nitric oxides, and meanwhile, increases the burn-off rate of coal powder.

Description

technical field [0001] The invention relates to a large-scale oxygen-enriched combustion system and method for anthracite with a novel direct blowing pulverizing device, belonging to the field of power generation equipment. Background technique [0002] my country's proven coal reserves are about 640 billion tons, of which low-volatile anthracite accounts for about 14.6% of the coal reserves. Anthracite is the coal with the longest burial age, the deepest degree of carbonization, and the lowest volatile content. Typical anthracite coal has high carbon content, high calorific value, high ash melting point and low volatile matter, low ash content and low sulfur content, which are the so-called "three highs and three lows". Its surface has a bright black luster, and its dry ash-free base has a volatile content of less than 10%, while its fixed carbon content and calorific value are relatively high. Anthracite is currently mainly used as fuel for power stations and industrial ...

AI Technical Summary

Problems solved by technology

At present, the maximum capacity of anthracite-fired W-flame boilers at home and abroad is 660MW. However, W-flame boilers generally have the above-mentioned combustion problems, and the structure of W-flame boilers is relatively complicated. The overall volume is large, the steel consumption is large, the manufacturing workload is large, the cycle is long, the cost is high, and the debugging is complicated. Moreover, when the W flame boiler develops to the 1000MW level, there are difficult technical problems such as furnace design and burner layout, and the manufacturing High cost, complex operation and maintenance

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