Smoke furnace waste heat boiler

Working principle

The structure of the waste heat boiler for the fuming furnace consists of a fuming refining tank, a fuming furnace top cap, a flue gas cooling chamber, an economizer, a medium pressure steam drum, a low pressure steam drum, a vaporization cooling system, a rising and falling pipe system, a cleaning mechanism, and other parts.

The fuming furnace adopts an integrated design scheme, organically combining the fuming furnace and the waste heat boiler. The bottom of the furnace is the fuming and refining tank, and the upper part of the furnace is the water jacket and water-cooled wall of the waste heat boiler. The closed membrane wall structure of the flue gas cooling chamber and economizer replaces the original water spray cooler and surface cooler of the fuming furnace. This structure is beneficial for fully recovering the waste heat generated during the fuming process, and generating steam through the waste heat boiler.

According to the pressure level, steam is divided into two systems. One is the low-pressure steam system, which consists of a vaporization water jacket, vaporization cooling system, and low-pressure steam drum, producing low-pressure steam for deoxygenation in the deaerator. The other is the medium pressure steam system, which consists of a fuming furnace top cap, a flue gas cooling chamber, an economizer, a rising and falling pipe system, and a medium pressure steam drum. The produced medium pressure steam first enters the heat storage device, and after pressure regulation, it is integrated into the plant's thermal network to achieve simple production and continuous steam supply.

Performance characteristics

1. The waste heat boiler of the fuming furnace adopts an integrated furnace design, with a fuming smelting pool at the bottom of the furnace, which increases the effective space of the fuming furnace, is conducive to metal oxidation and coal powder combustion, and improves the smelting condition of the fuming furnace and the technical operating conditions of the waste heat boiler.

2. Compact and unique new structure, saving steel.

3. Variable pressure thermal storage device solves the problem of intermittent production and continuous steam supply in the waste heat boiler of the fuming furnace, and successfully recovers the waste heat of the flue gas from intermittent production.

4. The combined effect of multiple dust cleaning measures effectively removes accumulated dust and ash, ensuring the normal operation of the furnace.

5. The metal structure design of the heating surface of the waste heat boiler in the fuming furnace adopts special materials and a labyrinth expansion structure, effectively dealing with the thermal expansion problem caused by frequent temperature changes due to the periodic operation of the fuming furnace.

6. The lower part of the waste heat boiler in the fuming furnace adopts RMC20 and RMS20 water jacket buried scraper machines, which solve the problem of boiler ash not falling off, meet environmental requirements, and reduce the labor intensity of workers.

Type

The relationship between maximum recovery of flue gas furnace waste heat boiler and steam pressure

The relationship between maximum recovery of superheated fuming furnace and steam pressure and temperature