Heavy oil is the residue left after crude oil is fractionated to extract gasoline, kerosene, and diesel. Sometimes this residue is further distilled under reduced pressure to extract lubricating oil and the remaining oil is also called heavy oil. There are many combustible components in heavy oil, carbon content: 86% to 89%, hydrogen content: 10% to 12%; the remaining components are very small in nitrogen, oxygen, and sulfur. The calorific value of heavy oil is very high, generally 40000~42000kJ/kg. It has high combustion temperature and strong flame radiation ability, and is a high-quality fuel for steel production.

Classification of steel rolling heating furnaces: according to the process, they are divided into wire, plate, profile heating furnaces, etc.; according to the heat source, they are divided into natural gas furnaces, gas furnaces, oil furnaces, coal furnaces, electric furnaces, etc.; according to the structural form, they are divided into chamber type, gap type, and table Car type, well type, stepping type, vibrating bottom type, continuous type, etc.; according to the thermal system and operation mode, it is divided into constant temperature furnace, intermittent temperature change furnace and continuous temperature change furnace.

The furnace space is as small as possible under the condition of ensuring fuel combustion, which is also the principle followed by Zhongwei environmental protection design. The height and length of each section of the furnace have a great influence on the heat transfer in the furnace, which directly affects the heating of the furnace and the utilization of fuel. When considering the height of the furnace, it is necessary to ensure that the fuel is fully burned and the furnace gas is filled. .

The length of the furnace body is determined by the total heating capacity, but in order to reduce energy consumption and increase the heat utilization rate of the furnace, the length of the furnace body can be appropriately increased. The short furnace body and high-temperature flue gas will not be fully utilized, and the exhaust gas will take away a lot of heat energy. Therefore, proper extension of the furnace body can reduce the strength of the furnace bottom and improve the thermal efficiency. The application of ZW series low-nitrogen burners in steel rolling furnaces is particularly prominent. Under certain heating conditions, the higher the hearth load, the lower the thermal efficiency and the higher the energy consumption. Conversely, as the furnace bottom load decreases, the heat loss taken away by the exhaust gas will be significantly reduced. If other conditions remain unchanged, if the furnace body is appropriately extended, although the increase in furnace bottom water pipes and furnace body masonry will increase this part of the heat loss, it is far less than the energy saved.

Steel rolling heating furnaces are based on different fuels: oil-fired steel rolling heating furnaces, gas-fired steel rolling heating furnaces, and oil-fired steel rolling heating furnace projects are mainly in Africa, with diesel and heavy oil heating furnaces mostly.

The characteristics of the burner of the heavy oil steel rolling heating furnace:

1. Fuel saving. Diesel burner or heavy oil adopts flame-stabilizing plate structure, adopts air compressor compressed air atomization method, fuel/air mixing is even, and combustion is complete. If high-viscosity heavy oil is used as fuel, auxiliary heating measures must be adopted to enhance the fluidity of heavy oil and facilitate atomization and combustion.

2. Suggest an automated control system. The burners of foreign oil-fired steel rolling heating furnaces generally adopt simple manual control functions. Especially using heavy oil as fuel, it is easy to block the heavy oil burner. In response to this situation, Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. designed effective measures to deal with the blocked burner to minimize the degree of blockage.

Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd. undertakes the "turnkey" project of diesel steel rolling heating furnace and heavy oil steel rolling heating furnace, and is responsible for: design, foreign construction, installation, commissioning and training "turnkey" technical services.