A coal-fired power plant boiler flue gas waste heat and water combined recovery and utilization system

Abstract

The invention discloses a united coal-fired power station boiler smoke waste heat and moisture recycling system which comprises a smoke input pipeline, a high-temperature heat pipe type air pre-heater, a denitration reactor, a smoke bypass regulation baffle, an economizer, an air pre-heater, a smoke treatment system, a condensing heat exchanger, a chimney, a low-temperature heat pipe type air pre-heater, a cooling tower, a first air heater and a second air heater. The system can achieve united coal-fired power station boiler smoke waste heat and moisture recycling, and the problem that an arid area brown coal unit is large in water consumption, a coal pulverizing system is poor in drying capability and a coal mill is high in coal pulverizing power consumption can be effectively solved.

Description

technical field [0001] The invention belongs to the field of thermal power generation equipment, and relates to a flue gas waste heat and moisture joint recovery system, in particular to a coal-fired power plant boiler flue gas waste heat and water joint recovery system. Background technique [0002] my country's lignite resources are mainly distributed in eastern Inner Mongolia, Northeast China, and Yunnan. The predicted lignite resources are 190 billion tons, and the proven reserves of lignite are 130 billion tons, accounting for 13% of the country's coal reserves. However, the high moisture content of lignite (up to about 25% to 50%) makes the boiler efficiency of existing lignite power generation units generally low, and the boiler is bulky, expensive, and the drying output of the coal mill is low. The capacity of auxiliary equipment is too large. The existing lignite generating set has large investment and long payback period. In addition, most of my country's lignite ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and propose a coal-fired power plant boiler flue gas waste heat and water combined recovery and utilization system. Effectively solve the problems of large water consumption of lignite units in arid areas, poor drying capacity of pulverizing system, and high power consumption of pulverized coal pulverization

Images