Exhaust smoke temperature correction method of blast furnace gas-fired boiler

Abstract

The invention discloses an exhaust smoke temperature correction method of a blast furnace gas-fired boiler. The exhaust smoke temperature correction method of the blast furnace gas-fired boiler is mainly designed for the exhaust smoke temperature correction method of the blast furnace gas-fired boiler provided with a gas heater and comprises the steps of respectively obtaining operating parameter guarantee value data of the gas heater and actually-measured operating data of boiler tail portion heated face; respectively calculating boiler exhaust smoke temperature deviation caused by a gas temperature deviation guarantee value of a gas heater inlet, the boiler exhaust smoke temperature deviation caused by gas temperature deviation guarantee value of the gas heater inlet and corrected boiler exhaust smoke temperature based on a first computational formula, a second computational formula and a third computational formula. The exhaust smoke temperature correction method of the blast furnace gas-fired boiler is simple, easy to operate, capable of ensuring the effectiveness and reliability of a correction result, providing a basis for performance analysis and examination and evaluation of the blast furnace gas-fired boiler of an iron and steel enterprise and has important practical significance.

Description

Technical field [0001] The invention relates to the field of boilers in thermal energy engineering, and in particular to a method for correcting the exhaust gas temperature of a blast furnace gas boiler provided with a gas heater. Background technique [0002] Iron and steel enterprises produce a large amount of blast furnace gas in the ironmaking process. Because blast furnace gas has the disadvantages of high nitrogen content, low theoretical combustion temperature, and difficulty in ignition, many iron and steel enterprises directly release blast furnace gas, resulting in a waste of energy. How to make good use of the by-product blast furnace gas resources in the iron and steel production process is a common concern of relevant technicians. [0003] In recent years, with the increasing progress and promotion of blast furnace gas combustion technology, blast furnace gas-fired boilers have been widely used in iron and steel enterprises. More and more iron and steel plants self-own...

AI Technical Summary

Problems solved by technology

[0010] and for figure 2 The new type of blast furnace gas-fired boiler that has appeared and been widely used in recent years shown in the figure has changed the layout characteristics of the traditional boiler with the air preheater as the final stage heat exchanger, and the correction of the boiler exhaust gas temperature can no longer be applied to GB10184-88 provided method

However, the research on the correction method for the exhaust gas temperature of this type of boiler has not been reported yet, and most of the blast furnace gas-fired boilers still use the method provided by GB10184-88, that is, the correction is carried out according to the traditional method

Obviously, the results obtained in this way will deviate from the true value, and its validity and reliability cannot be guaranteed

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