Gas heat value soft measurement method based on combustion system operation parameter

Abstract

The invention provides a gas heat value soft measurement method based on a combustion system operation parameter. The soft measurement method comprises the steps of acquiring real-time data of the combustion system operation parameter; preprocessing the acquired data, and obtaining effective data for solving the gas heat value; and according to the acquired effective value, calculating a gas dry base heat value. According to the method, the gas dry base heat value is indirectly calculated according to a relation between a dry air amount and the gas heat value, and a result can be used for guiding combustion optimization adjustment of combustion equipment, thereby providing a basis for safe and economic operation of the combustion equipment, setting inconvenience and difficulty in combustion equipment operation caused by no gas heat value online analyzer in a majority of steel plant gas combustion systems, and realizing high practical engineering value.

Description

technical field [0001] The invention relates to the technical field of energy saving of combustion equipment, in particular to a method for soft measurement of gas calorific value based on operating parameters of a combustion system. Background technique [0002] Iron and steel enterprises produce a large amount of by-product gas during the smelting process, including blast furnace gas, converter gas, and coke oven gas. The above-mentioned by-product gas is the most important gas fuel for steel plants. An important way to improve market competitiveness. [0003] At present, steel mills mainly use gas boilers, steel rolling heating furnaces, blast furnace hot blast stoves, ladle roasters and other equipment to digest by-product gas. For these combustion equipment, the calorific value of fuel is an important basis for its combustion adjustment and an important input parameter for the thermal efficiency of the equipment. The change and fluctuation of the fuel calorific value w...

AI Technical Summary

Problems solved by technology

However, due to limited conditions, most iron and steel enterprises have not equipped combustion equipment with on-line gas calorific value measuring devices, and steel mills basically still use manual input of periodic laboratory analysis values ​​as the current gas calorific value.

In fact, due to the influence of factors such as the upstream smelting process, the composition and calorific value of the gas are difficult to keep stable and often fluctuate. To a certain extent, it interferes with the operation judgment of the operator and affects the optimal operation of the combustion equipment

[0004] There is a need for a gas calorific value soft measurement method based on the operating parameters of the combustion system. The calorific value of the gas can be identified through the operating parameters of the combustion equipment. The results can be used to guide the combustion optimization adjustment of the combustion equipment and provide a basis for the safe and economical operation of the combustion equipment. To solve the inconvenience and difficulty caused by the operation of most of the combustion equipment in iron and steel plants that are not equipped with gas calorific value online analyzers

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