Correction Method of Exhaust Flue Temperature of Blast Furnace Gas-fired Boiler

Abstract

The invention discloses a method for correcting the exhaust gas temperature of a blast furnace gas-fired boiler, which is mainly designed for the method for correcting the exhaust gas temperature of a blast furnace gas-fired boiler provided with a gas heater. The method for correcting the exhaust gas temperature of the blast furnace gas-fired boiler of the present invention includes separately obtaining the guaranteed value data of the operation parameters of the gas heater and the actual measurement operation data of the heating surface at the tail of the boiler; based on the first calculation formula, the second calculation formula and the third calculation formula Calculate the boiler exhaust gas temperature deviation caused by the gas heater inlet gas temperature deviation from the guaranteed value, the boiler exhaust gas temperature deviation caused by the gas heater inlet gas temperature deviation from the guaranteed value, and the corrected boiler exhaust gas temperature. The exhaust gas temperature correction method of the blast furnace gas-fired boiler of the present invention is simple and easy to implement, can ensure the validity and reliability of the correction result, and can provide a basis for performance analysis and evaluation of the blast furnace gas-fired boiler in iron and steel enterprises, and has important practical significance .

Description

technical field [0001] The invention relates to the boiler field of thermal engineering, in particular to a method for correcting exhaust gas temperature of a blast furnace gas boiler equipped 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 technical personnel. [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. Including full-fired blast furnace gas boilers,...

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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