Waste heat boiler mechanical dust-cleaning system

Abstract

The invention discloses a waste heat boiler mechanical dust-cleaning system which comprises an inner dust cleaning device, an outer transmission device and an electrical control device. The inner dust cleaning device comprises an inner elastic frame, a brush and an outer fixing frame, wherein the brush is used for cleaning siliceous dust outside the pipe wall and is arranged on the inner elastic frame, and the inner elastic frame is connected with the outer fixing frame provided with idler wheels rolling on a guide rail of the outer transmission device. The outer transmission device comprises the guide rail, steel wire ropes, a coiling block, a driving motor, a speed reducing spring and travel switches, wherein the travel switches are arranged at two ends of a speed reducing transmission mechanism guide rail, the speed reducing transmission mechanism guide rail is connected with the electrical control device through the travel switches, and forward and reverse rotation of the driving motor is controlled to achieve the fact that the inner dust cleaning device conducts reverse movement on the guide rail when moving to two ends. The waste heat boiler mechanical dust-cleaning system is reasonable in structure, accumulated dust, having large stickiness, of a submerged arc furnace is relatively thoroughly brushed, and therefore the heat transfer coefficient of a tube bundle is improved, and waste heat recovering efficiency of a waste heat boiler is further improved.

Description

technical field [0001] The invention relates to a waste heat boiler mechanical dust removal system. Background technique [0002] As an important part of the iron and steel industry, the ferroalloy industry consumes a large amount of energy every year. Its products are not only high-energy carriers, but also the high-temperature flue gas of about 750-900°C generated during the smelting process and the heat dissipation of equipment take away a lot of energy. Ferrosilicon smelting During the process, the flue gas waste heat parameters (temperature, flow rate) have certain fluctuations, and the fluctuation range is large. The silica fume (commonly known as micro silica fume) in the flue gas is very fine, with an average particle size of 0.15-0.20 μm and a specific surface area of 15000~20000m2 / kg, with extremely strong adhesion and very high thermal resistance, because the particle size of micro-silica fume is too small, mechanical dust collectors, including sedimentation dust ...

AI Technical Summary

Problems solved by technology

At present, the ash removal devices on the heating surface of the waste heat boiler in the submerged arc furnace system mainly include mechanical vibration ash removal, acetylene deflagration ash removal, steam soot blowing, shock wave soot blowing, shot blasting soot blowing, etc. According to user feedback, the above Several ash removal devices have poor ash removal effect during the operation of the waste heat boiler. Due to the sticky ash on the outer wall of the heating tube, the heat exchange efficiency is greatly reduced. At the same time, the operating life of the ash removal device is short and the failure rate is high, which has seriously affected the waste heat boiler. safe operation of

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