Fan mill front counter flow type furnace-smoke drying dewatering direct blowing pulverization system

Abstract

The invention discloses a fan mill front counter flow type furnace-smoke drying dewatering direct blowing pulverization system. A pulverized coal mixer is arranged between a coarse powder separator and a pulverized coal distributor. The upper part of the lower drying pipe is provided with a coal gas outlet which is communicated with a coal gas filter. A coal outlet of the coal gas filter is also communicated with the pulverized coal mixer, a gas outlet of the coal gas separator is communicated with a coal gas fan, the coal gas fan is also communicated with a coal gas cooler, the coal gas cooler is provided with a condensation water outlet and a coal gas outlet, and the coal gas outlet is communicated with a coal gas burner of a boiler. The fan mill front counter flow type furnace-smoke drying dewatering direct blowing pulverization system has advantages of improving the burn-up quality of brown coal so as to enhance the thermal efficiency of the coal, recovering a large quantity of water vapor, obviously reducing the size and the manufacturing cost of the boiler, realizing zero pollution discharge and the like.

Description

technical field [0001] The invention belongs to the technical field of coal power generation, relates to a lignite power generation technology, and specifically relates to a lignite drying and pulverizing system. Background technique [0002] Lignite, also known as firewood, is mostly brown or brownish black, and is a kind of high volatile (about 50%), high moisture (25%-60%), high ash (about 30%), low calorific value (about 50%). 3200kcal / kg), low ash melting point, easy weathering and fragmentation, easy oxidation and spontaneous combustion of inferior fuel, it is the mineral coal with the lowest degree of coalification. Lignite is mainly used as fuel for power plants, and can also be used as chemical raw materials, catalyst carriers, adsorbents, sewage purification and metal recovery. Due to the limitations of natural properties and technical processes, the main problems in the process of mining and utilizing lignite include: (1) Low calorific value and limited use. Bui...

AI Technical Summary

Problems solved by technology

Due to the limitations of natural properties and technical processes, the main problems in the mining and utilization of lignite include: (1) low calorific value and limited use

The upgrading of lignite also brings a lot of problems such as storage, packaging, transportation, spontaneous combustion, and environmental pollution after lignite upgrading, and the investment is huge

Moreover, it failed to coordinate with the lignite pulverization system of the power plant, which made various lignite upgrading technologies costly and failed to be popularized and applied.

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