Air distribution optimized automatic control system and control method thereof of boiler

Abstract

The invention provides an air distribution optimized automatic control system and a control method thereof of a boiler. The system comprises a boiler furnace, a blower, a boiler rear smoke channel, an induced draft fan, a depressimeter, an oxymeter and a PLC (programmable logic controller) automatic control system; the PLC automatic control system is used for setting a furnace negative pressure set value and an oxygen content set value; the depressimeter and the oxymeter are respectively used for measuring a negative pressure in the boiler furnace to obtain a negative pressure measured value and an oxygen content in the boiler rear smoke channel to obtain an oxygen content measured value; the PLC automatic control system receives the negative pressure measured value and the oxygen content measured value and compares the negative pressure measured value and the oxygen content measured value with the furnace negative pressure set value and the oxygen content set value, then sends an instruction according to a comparative result to adjust an induced draft volume of the induced draft fan and a blast volume of the blower; thus the negative pressure in the boiler furnace and the oxygen content in the boiler rear smoke channel behind a boiler last-stage heating surface are adjusted to the set values, so that the boiler always runs under the economic condition; and automatic adjustment of the oxygen content or automatic adjustment of the furnace negative pressure can also be adopted independently.

Description

technical field [0001] The invention relates to boiler energy-saving technology, and more specifically relates to a boiler air distribution optimization automatic control system and a control method thereof. Background technique [0002] Boilers are energy-intensive devices and are numerous in number. At present, there are generally problems of low energy efficiency and serious energy waste in the boilers in use in our country. Due to the poor air distribution of the boiler, the heat loss of the boiler exhaust and the loss of incomplete combustion are relatively large, so that the thermal efficiency of the boiler is low, which is the problem of most boilers at present. The reasons for this situation are firstly the incomplete assembly of the energy-saving metering device, secondly the variable operation of the boiler, and thirdly no corresponding adjustments according to the operating conditions. Contents of the invention [0003] The technical problem to be solved by th...

AI Technical Summary

Problems solved by technology

At present, there are generally problems of low energy efficiency and serious energy waste in boilers in use in my country.

Due to the poor air distribution of the boiler, the heat loss of the boiler exhaust and the loss of incomplete combustion are relatively large, so that the thermal efficiency of the boiler is low, which is the problem of most boilers at present.

The reasons for this situation are firstly that the assembly of the energy-saving metering device is not complete, secondly, the operation of the boiler is changeable, and thirdly, there is no corresponding adjustment according to the operation

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