Inlet sealing and connecting device for exhaust-heating boiler

Abstract

The invention discloses a connection device used for sealing entrance of waste heat boiler, comprising a lower part sealing connection piece which is buttoned up at the flue gas exit of melting furnace, and a flexible sealing connection piece one end of which is suitable to be in sealed connection with the waste heat boiler and the other end of which is in sealed connection with the lower part sealing connection piece, thus the flexible sealing connection piece and the lower part sealing connection piece can move relative to the waste heat boiler. The sealing connection device of the invention is composed of the lower part connection part and the flexible connection part, wherein, the flexible connection part is provided with expansion margin, thus satisfying thermal expansion when in performance and avoiding the occurrence of gap due to the thermal expansion of the waste heat boiler and the melting furnace. Therefore, the connection device used for sealing entrance of waste heat boiler has the advantages of fine sealing performance, simple operation and low cost.

Description

Technical field [0001] The invention relates to a sealed connection device used between a waste heat boiler and a smelting furnace, in particular to a sealed connection device installed between the inlet of the waste heat boiler and the flue gas outlet of the smelting furnace. Background technique [0002] In the smelting field, the waste heat boiler is used to recover the heat of the high-temperature flue gas discharged from the smelting furnace. In the prior art, a refractory brick structure or a water-cooled water jacket structure is used between the smelting furnace and the waste heat boiler to form a sealed flue structure . The high-temperature flue gas discharged from the smelting furnace enters the waste heat boiler, and the waste heat boiler takes away the heat energy of the high-temperature flue gas through heat exchange and transports it to the end user. [0003] Since the smelting furnace and the waste heat boiler will expand and deform after being subjected to high te...

AI Technical Summary

Problems solved by technology

The refractory brick structure is not flexible. Therefore, the sealing of this connection structure is poor, and the smoke leakage in the gap is large. The air leakage rate is generally 40%-80%. It is difficult to treat the tail gas at the rear; Corrosion will occur; again, energy is wasted, and the heat taken away by air leakage and cooling water cannot usually be recycled. Due to air leakage, the energy consumption of the induced draft fan and rear exhaust gas treatment will increase. Finally, the operating environment is poor. There are large gaps between them, and the flue gas often escapes, polluting the operating environment, and the refractory brick sealing structure is seriously dusty, requiring manual cleaning, while the water-cooled water jacket structure has a short life, and the water jacket structure cools the heat absorbed by the flue gas. Taken away by the cooling water, not being used and wasting energy

[0004] In addition, when an accident needs to be inserted between the waste heat boiler inlet and the smelting furnace flue gas outlet, the refractory brick structure needs to be removed, and then the flue ram is inserted between the waste heat boiler inlet and the smelting furnace flue gas outlet In between, the flue shutter is finally pulled out, and refractory bricks are built again. In other words, the refractory brick structure is one-time, so the operation is complicated, time-consuming and costly

In the case of the water-cooled water jacket structure, the flue gate must be removed before it can be inserted, which is complicated to operate and low in efficiency

Images