Blast furnace gas ladle roaster: oxygen rich or pure oxygen combustion support,

1、 Composition and characteristics of blast furnace gas fuel:

1. Composition and characteristics of blast furnace gas: by-products generated during the ironmaking process of steel plants, mainly composed of CO, CO2, N2, H2, CH4, etc. The combustible component CO content is about 25%, with very little H2 and CH4 content. CO2 and N2 content account for 15% and 55% respectively, and the calorific value is only 750-800kcal/m ³ Around, it belongs to low calorific value gas.

2. The CO2 and N2 in blast furnace gas neither participate in combustion to generate heat nor support combustion. On the contrary, they also absorb a large amount of heat generated during the combustion process, resulting in a low theoretical combustion temperature, slow heating rate, low temperature, and poor combustion stability of blast furnace gas. Therefore, attention should be paid to the design of the burner for blast furnace coal gas roasting equipment. Given this, what are the characteristics of the blast furnace gas burner designed by Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd?

2、 The blast furnace gas burner is the core component of the ladle roaster, and its characteristics are as follows:

1. The burner adopts a stable flame disc structure, and the blast furnace gas and air are evenly mixed with accurate proportions to achieve full combustion. The combustion tube is made of stainless steel 310s (Cr25Ni20) or silicon carbide, which can withstand high temperatures from 1100 to 1300 ℃ and has a service life of about 5 years. The burner is designed with a high-precision UV probe device to monitor the combustion status of the flame in real-time. In case of sudden flameout, the system will sound and light an alarm and immediately cut off the gas. The length of the combustion tube is determined by the thickness of the refractory material on the cover, with a standard of 300mm and can be extended. The cover adopts a refractory fiber cotton or castable structure, which is attached to the outer edge of the ladle to reduce heat loss.

2. The control cabinet design function of the blast furnace gas burner includes automatic ignition, flameout protection, leakage alarm function, and automatic temperature control function based on the baking process curve.

3. The blast furnace gas burner is designed with a "long open fire" structure. Due to the difficulty in achieving automatic ignition of blast furnace gas, high calorific value fuels such as natural gas or liquefied gas are used for ignition. After the combustion is stable, the natural gas burner or liquefied gas burner is first ignited, and the main gas burner is automatically switched to prevent the phenomenon of "explosion" when a large amount of gas accumulates in the furnace when encountering an open fire.

4. The blast furnace gas has a high CO content and high toxicity. The burner design, production, and structure are tight, and the pipeline is designed with a gas leakage alarm device. In case of a leakage, the system alarms and urgently cuts off the gas to prevent accidents.

5. The pipeline design is equipped with anti backfire and venting devices to prevent backfire during normal operation of the gas burner. The residual gas in the gas pipeline should be promptly drained during shutdown.

6. The burner has a long flame and is directly sprayed onto the bottom of the ladle. The ladle has fast baking speed, uniform temperature, and high baking quality, extending the service life of the ladle.

7. Blast furnace gas combustion can be assisted by rich or pure oxygen, with higher combustion efficiency and low NOx emissions, meeting environmental requirements. For more information, please feel free to call (WeChat synchronization): 15713691937.

Zhongwei Environmental Protection Group (Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. and Zhengzhou Deste Automation Equipment Co., Ltd.) has undertaken the "general contracting" project of large-scale industrial furnaces, ovens, burners, automation automation control systems, desulfurization and denitrification equipment, and online monitoring devices both domestically and internationally, and has undertaken energy-saving and intelligent upgrading projects for large-scale steel enterprise baking equipment.

Some of the content and pictures are extracted from the Internet. Please contact us for deletion if there is any infringement.