Soft measurement method of blast furnace gas generation

Abstract

The invention discloses a blast furnace gas generation amount soft measurement method. The method comprises the following steps that a steel / iron enterprise energy management and control system acquires blast furnace operation data, and calculates a blast furnace operation state, and the state is divided into three types of damping down, wind reduction and normal; when a blast furnace is located in the damping down or normal state, a soft measurement model based on a blast furnace gas generation mechanism is built; and when the blast furnace is located in the wind reduction state, the energy management and control system acquires such furnace condition information, influencing a blast furnace gas generation amount, as molten iron yield and blast volume, and extracts nonlinear characteristic vectors through mutual information analysis to build a blast furnace gas generation amount soft measurement model based on intelligent parameter optimization regression analysis. The method effectively combines the blast furnace process state with the blast furnace condition information, so that the soft measurement method is high in sensitivity and accurate in measurement result, and the excellent data support is provided for blast furnace gas dispatching.

Description

technical field [0001] The invention relates to a soft-sensing modeling method, in particular to a soft-sensing method for blast furnace gas generation in iron and steel enterprises, which is used in the field of soft-sensing technology. Background technique [0002] The total energy consumption of the iron and steel industry accounts for about 10% of the total industrial energy consumption of the country. By-product gas is an important secondary energy source in iron and steel complexes, of which blast furnace gas accounts for 45%, which has an important impact on the production process of the entire iron and steel enterprise. Blast furnace gas can provide heating energy fuel for the production process, and provide important power generation energy for power plant power generation and gas turbine-steam turbine combined cycle power generation. In the process of smelting pig iron in the blast furnace of iron and steel enterprises, the blast furnace gas system provides importa...

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Problems solved by technology

Blast furnace gas generation will be affected by changes in blast furnace conditions such as blast volume, fuel, and oxygen enrichment. At the same time, when the gas meter is in a small range or contains other impurities such as tar, the accuracy is relatively poor, resulting in inaccurate measurement of gas generation. These The occurrence of the phenomenon caused the accumulation of measurement errors, resulting in the inconsistency between the actual amount of blast furnace gas and its instrument measurement value, which led to the imbalance of the entire blast furnace gas pipeline network

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