Waste fan blade pyrolysis afterburning system and method based on coal-fired power plant

Abstract

The invention relates to a waste fan blade pyrolysis afterburning system and method based on a coal-fired power plant. The system comprises a feeder, a crusher, a gas-liquid separation tower, a pyrolysis reactor, an oil storage tank, an air storage tank, a flue gas mixing temperature adjusting device, a burner and a waste bin. According to the system, flue gas at an outlet of a boiler reheater ofthe coal-fired power plant and at an inlet of a coal economizer are used as a starting and temperature-regulating heat source of the system, so that the temperature control over the pyrolysis reactoris realized, combustible gas generated by pyrolysis of a fan blade is directly used for heating the pyrolysis reactor, so that an energy-saving effect is achieved, redundant combustible gas is storedand used for afterburning of an inlet flue of a SCR reactor in a peak-shaving process of a coal-fired unit, so that the problem that a catalyst blocks a channel existing in the peak-shaving process can be avoided, oil substances generated by pyrolysis of the fan blade are stored, and used for being put into a furnace of a coal-fired boiler for combustion in the peak-shaving process of the coal-fired unit, combustion of the furnace of the boiler under low load conditions is stabilized, full utilization of pyrolysis products is fully utilized, and full recovery of energy is realized.

Description

technical field [0001] The invention relates to the technical field of post-combustion technology for boiler tail flue, in particular to a pyrolysis post-combustion system and method for waste fan blades based on coal-fired power plants. Background technique [0002] Wind energy is currently one of the clean energy sources recognized globally, but the disposal of wind energy-generating equipment after they are scrapped is not always clean. While most components are recyclable, wind turbine blades are difficult to recycle effectively due to the composition of their constituents. It is estimated that 10kg of blade material is required for every 1kW of new installed capacity. Therefore, a 7.5MW fan needs about 75 tons of blade materials, which is a huge amount. Therefore, the recycling of decommissioned blades will become an urgent problem to be solved. [0003] At present, most domestic coal-fired units are involved in peak regulation, so that the units often operate under ...

AI Technical Summary

Problems solved by technology

When the boiler load decreases, the flue temperature at the inlet of the SCR reactor decreases. When the flue temperature is lower than the catalyst activation reaction temperature (320-400°C), it is easy to cause blockage of the catalyst channel and affect the normal operation of the SCR.

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