Mineral heat furnace waste heat boiler

Working principle

The waste heat boiler of a blast furnace can be used for power generation, providing hot water or steam. The waste heat recovery power generation technology of a blast furnace converts the waste heat of the enterprise into secondary energy without affecting the production and quality of the enterprise's products or increasing the consumption of primary energy (coal, fuel or natural gas), and provides electricity for internal use of the enterprise. Not only does it improve the comprehensive utilization rate of resources, but it also reduces the production costs of enterprises, and avoids economic losses caused by power outages due to factors such as grid maintenance, power restrictions, and thunderstorms and strong winds. This device has a high level of automation, easy operation, convenient maintenance, reliable operation, and no secondary pollution.

The waste heat boiler of a blast furnace is a comprehensive waste heat recovery and power generation system that integrates the sensible heat recovery of blast furnace products, the waste heat recovery of flue gas, the heat energy recovery of CO combustion in flue gas, and low-pressure low-temperature power generation technology. The main feature of this product is the application of a closed hot air tunnel kiln in the sensible heat recovery and power generation of mineral heat furnace products; Applying hot blast stove to recover heat energy from CO combustion in flue gas for power generation; The flue gas waste heat recovery power generation adopts three-level dust removal technology to thoroughly remove coarse particles, medium fine particles, and fine particle dust in the flue gas, so that the flue gas emissions meet the national emission standards.

Performance characteristics

Due to the use of needle shaped tube heat exchange elements and vertical modular layout structure in the waste heat boiler of this mine, the overall investment costs of equipment, installation, and infrastructure construction are greatly reduced under the same heat exchange area. In terms of equipment installation and layout, it provides users with a large space.

2. Self cleaning ash

Due to the cantilever structure of the needle shaped tube, the needle ribs vibrate under the impact of airflow, making it difficult for cigarette ash to accumulate. Combined with the strong turbulent flow of smoke, the needle shaped tube heat exchange element has a strong self-cleaning ability.

3. Wear resistance

The needle shaped tube is arranged in a straight line, and the needle ribs divide the space into several small areas, which has a uniform flow effect on the airflow. Compared with light tubes, spiral finned tubes, etc. that are arranged in a staggered manner, the wear life is 3-4 times higher under the same conditions.

4. Low energy consumption

The needle spacing, tube spacing, and arrangement form of the needle shaped tube are important design parameters for the waste heat boiler of the mineral heat furnace. Regardless of whether the boiler is horizontally or vertically flushing the tube bundle, all needle shaped expansion surfaces are subject to the lateral turbulent flow of the flue gas. The airflow forms a symmetrical steady-state vortex and recirculation zone on the back of the cylindrical surface of the needle rib, and the thermal boundary layer is continuously destroyed and reformed, thereby thinning the entire heat transfer boundary layer, reducing thermal resistance, and improving the heat transfer coefficient.

5. Sealed well

All butt welds are welded using argon arc welding, which significantly improves the welding quality compared to manual welding.

6. Lightweight and compact in size

Due to its vertical layout, this device achieves reverse heat exchange between flue gas and water, significantly reducing its volume and weight. The heat transfer area per unit length is large, and the heat transfer area using needle shaped tubes is 7-8 times that of light tubes and 1-3 times that of spiral finned tubes.

Type