An on-line soft measurement method for furnace-entering gas components of a full-combustion converter gas industrial furnace

Abstract

The invention relates to an on-line soft measurement method for furnace-entering gas components of a full-combustion converter gas industrial furnace. The soft measurement method comprises the following steps: acquiring real-time data of operation parameters of a combustion system; Preprocessing the collected data to obtain effective data for solving the calorific value of the gas; According to the obtained effective data, calculating to obtain a coal gas dry basis heat value; According to the method, the coal gas dry basis heat value is obtained through indirect solving according to the relation between the dry air amount and the coal gas heat value, and the volume content percentage of each component of furnace entering and exiting coal gas is further calculated. The method is suitable for burning converter gas and adopts air and combustion equipment adopting a gas double-preheating technology. The calculation result can be used for guiding the combustion optimization adjustment of the combustion equipment, a basis is provided for the safe and economic operation of the combustion equipment, the inconvenience and difficulty brought to the operation of the combustion equipment dueto the fact that the gas composition online analyzer is not configured in most existing steel mill gas combustion systems are solved, and the engineering practical value is very good.

Description

technical field [0001] The invention relates to the technical field of industrial furnaces of thermal energy engineering, in particular to an online soft measurement method for the composition of the furnace gas in a full-fired converter gas industrial furnace. Background technique [0002] Iron and steel enterprises produce a large amount of converter gas in the steelmaking process. As a by-product resource in the smelting process, the effective recycling of converter gas is one of the key points of energy saving and consumption reduction for iron and steel enterprises. [0003] At present, steel mills digest converter gas mainly through industrial furnaces (such as steel rolling heating furnaces, gas boilers, hot blast stoves, ladle bakers, etc.). For industrial furnaces, the calorific value of fuel is an important basis for its combustion adjustment, and it is also an important input parameter for the thermal efficiency of industrial furnaces. The change and fluctuation o...

AI Technical Summary

Problems solved by technology

However, due to limited conditions, at present most iron and steel enterprises have not equipped industrial furnaces with gas calorific value online measuring devices, and steel mills basically still use manual input of periodic laboratory analysis values ​​as the current gas calorific value

In fact, affected by factors such as the upstream smelting process, the composition and calorific value of converter gas are difficult to maintain stable and often fluctuate, and the periodic test values ​​manually input are likely to deviate greatly from the current real values. Interfering with the operation judgment of industrial furnace operators to a large extent, affecting the optimal operation of industrial furnaces

[0004] Therefore, it is necessary to propose an online soft measurement method for the gas composition of the furnace gas entering the furnace in an all-fired converter gas industrial furnace for the combustion equipment with double preheating of air and gas. The volume content percentage of each component, the results can be used to guide the optimization and adjustment of the combustion of industrial furnaces, provide a basis for the safe and economical operation of industrial furnaces, and solve the problem that most iron and steel enterprises have not equipped online analyzers for furnace gas composition in the rolling mills. Inconvenience and difficulties caused by furnace operation

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