Keywords
fuel
combustion activator
steam boiler
How to Cite
Abstract
The article analyzes and improves the system for measuring and controlling (regulating)
the parameters of fuel combustion systems in the furnaces of steam boilers of thermal power
plants, namely the consumption of solid fuel (pulverized coal mixture) and combustion activators,
which increase the efficiency of burning low-grade fuels without significant modernization of
furnaces and other parts steam boilers. A method is shown for improving the accuracy of
measuring and regulating the supply of solid fuel to the boiler furnace, based on the simultaneous
measurement of the rotational speed and torque on the dust feeder shaft and subsequent
calculation of the actual value of dust consumption in a microprocessor computer system based
on the differential equation of the dust feeder rotor dynamics. The possibility of improving the
mathematical model of the boiler unit as a control object is shown. The model includes the
parameters of the combustion activator, which improves the process of burning low-grade fuel.
The shortcomings of the technology of using combustion activators are given, the main of which
is the need for an accurate dosage of additives depending on the quantity and quality of the fuel.
The possible range of efficiency of using the combustion activator depending on its consumption
is determined (the dependence of the change in the conditional fuel consumption on the
conditional consumption of the combustion activator during coal combustion). The possible
economic effect is determined when using combustion activators, namely, the increase in
efficiency when burning low-grade fuels. A functional diagram of the automatic control system
for the process of supplying fuel and a combustion activator to the boiler furnace of thermal
power plants is presented. The system adjusts taking into account the quantity and quality of fuel
burned in the furnace of boiler units of thermal power plants.