Multi-section type expansion flue of waste heat boiler

Abstract

The invention relates to a waste heat boiler multi-section type expansion flue which comprises a U-shaped flue body, the U-shaped flue body comprises two first linear sections, a second linear section and a bent section, the first linear sections are connected with a boiler, and the second linear section is connected with a dust removal system; the bent section is provided with a sealing mechanism, the second linear section is provided with a gas guide pipeline in a communicating mode, and the gas guide pipeline is communicated with an external waste heat recovery system. A cleaning mechanism is arranged in the second linear section and comprises a power component moving along the axis of the second linear section and the axis of the bent section, the power component is connected with a cleaning component, and the cleaning component is located between the air guide pipeline and the bent section. A collecting component is arranged between the cleaning component and the air guide pipeline, the collecting component comprises a discharging piece, a triggering component is arranged in the air guide pipeline, and the triggering component is connected with the discharging piece.

Description

【Technical field】 [0001] The invention relates to the technical field of steelmaking, in particular to a multi-stage extended flue of a waste heat boiler. 【Background technique】 [0002] In the process of converter steelmaking, a large amount of high-temperature converter gas is produced. For the recovery of converter gas, the method of vaporization cooling system and converter gas dust removal system is usually used. Converter vaporization cooling flue is one of the main supporting equipment for converter steelmaking. When the equipment is working, it must collect and cool the high-temperature flue gas from the furnace mouth to the maximum extent. However, when the equipment is in the converter steelmaking process, the high-temperature flue gas will carry hot red slag into the vaporization cooling flue of the converter. After reaching the flue wall, it will cool and slag. When the slagging gradually increases, the cross-sectional area of ​​the flue will be reduced, which wi...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems in the prior art that hot red slag will cool and slag when it encounters the flue wall, reduce the cross-sectional area of ​​the flue, and have an adverse effect on converter steelmaking, and provide a method that can timely treat the inside of the flue Slagging device

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