Low-calorific-value operating method of blast furnace gas-fired 300MW generator set

Abstract

The invention discloses a low-calorific-value operating method of a blast furnace gas-fired 300MW generator set. According to the low-calorific-value operating method, when a unit is in operation, a control value of a gas calorific value can be reduced by modifying a logical constant value. The method performed by adopting a low-calorific-value mode comprises the following steps: reducing a set gas calorific value; adjusting high and low alarm values of the gas calorific value, and rapidly reducing load to protect alarm values of an operating value and a wet-state calorific value; and adding high sound-light alarm of combustion chamber pressure and the like. The low-calorific-value operating method disclosed by the invention has the advantages of reducing the combustion quantity of coke oven gas, ensuring high-load and high-efficiency operation of the unit, and saving the power generation cost.

Description

technical field [0001] The invention relates to a method for operating a 300MW blast furnace gas with low calorific value. Background technique [0002] Angang’s 300MW CCPP uses blast furnace gas and coke oven gas as fuel. Blast furnace gas has a low calorific value and is not easy to organize combustion. By blending coke oven gas, the calorific value is increased to 4400kJ / m 3 , stable combustion. When the amount of coke oven gas is insufficient, the unit must be operated at reduced load or even shut down. The reduced load operation will result in less power generation, low thermal efficiency, poor economy, and a large amount of blast furnace gas. The impact of shutdown on production is more serious. In addition, the calorific value of blast furnace gas and coke oven gas is different, and the price difference is huge. On the premise of ensuring stable combustion and safety, adopting a low gas calorific value mode to operate and reduce coke oven gas will also save a lot of...

AI Technical Summary

Problems solved by technology

When the amount of coke oven gas is insufficient, the unit must be operated with reduced load or even shut down. The reduced load operation will result in less power generation, low thermal efficiency, poor economy, and a large amount of blast furnace gas. The shutdown will have a more serious impact on production.

In addition, the calorific value of blast furnace gas and coke oven gas is different, and the price difference is huge