Online automatic ash clearing device of fire tube type waste heat boiler

Abstract

The invention discloses an online automatic ash clearing device of a fire tube type waste heat boiler. The online automatic ash clearing device comprises a lifting platform, a vertical column, a control system, a monitoring system, a locating system, a driving system and an ash clearing gun, wherein the vertical column is fixedly connected with the lifting platform, the control system is separately connected with the monitoring system, the locating system and the driving system, and the driving system is connected with the ash clearing gun. The online automatic ash clearing device of the fire tube type waste heat boiler, provided by the invention, is applied to the fire tube type waste heat boiler which requires the clearing of ash in a tube and runs under negative pressure and automatically controls the ash clearing gun to clear ash via a driving mechanism instead of manual operation. Compared with a manual ash clearing mode, the automatic ash clearing device has the advantages that the ash clearing efficiency is increased, labor intensity and labor cost are reduced, and at the same time, the hurt of high-temperature and high-pressure steam to operators when the fire tube type waste heat boiler leaks is avoided.

Description

technical field [0001] The invention relates to the technical field of cleaning equipment, in particular to an online automatic ash cleaning device for fire tube waste heat boilers, which is widely used in petrochemical, chemical and other industries. Background technique [0002] In petrochemical and chemical industries, waste heat boiler is a major heat recovery or heat exchange equipment. Waste heat boilers are divided into fire tube waste heat boilers and water tube waste heat boilers. Fire tube waste heat boilers use high-temperature gas to flow in the furnace tubes. The descending tube flows into the bottom of the boiler, and is heated on the tube wall to become a steam-water mixture, which is returned to the steam drum by the rising tube; the water tube waste heat boiler adopts the method of boiling water flowing through the tube, and high-temperature gas flowing outside the tube. [0003] The main characteristics of the waste heat boiler are: ① high temperature and h...

AI Technical Summary

Problems solved by technology

[0005] The flue gas of the fire tube waste heat boiler flows in the tube bundle. There are many tube bundles and densely arranged. The ash and scale are stuck in the tubes. The traditional ash cleaning device can hardly work.

At present, different methods are used to clean the soot in the tubes of this type of boiler according to different situations. If the boiler is operated under negative pressure, the soot cleaning gun can be manually used for online cleaning. Since the condition of the gun rod entering the boiler tube cannot be observed manually, it cannot be guaranteed that each The pipes have been cleaned, and there may be some problems that some pipes have not been cleaned for a long time, and some pipes have been cleaned repeatedly. The working conditions near the waste heat boiler are harsh, the ambient temperature is high, and some gases are harmful to the human body if they are inhaled for a long time, and manual cleaning is required. Once the tube explodes, the high-temperature and high-pressure steam outside the tube will be sprayed into the flue, and will be ejected through the soot cleaning hole on the flue, which will easily cause casualties; cleaning by flushing

Generally, petrochemical and chemical plants have high requirements for stable and continuous operation of the system, and frequent shutdowns will cause huge economic losses. At the same time, frequent startups and shutdowns will also cause certain damage to equipment

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