Vibrating ash cleaner for exhaust-heating boiler

Abstract

A dust shaking and cleaning device of a waste heat boiler is mainly composed of a shaking rod mechanism, a shaking hammer mechanism and an electric motor transmission mechanism. The shaking rod mechanism at least comprises a shaking rod with one end contacting with a shaking surface. The shaking rod runs through a wall face of an insulation can and is provided with a sealing device, and a spring is arranged on the shaking rod. The shaking rod mechanism is characterized in that the sealing device at least comprises a guide sleeve fixed on the wall face of the insulation can; the shaking rod runs through the guide sleeve; and an oil-impregnated disk packing is arranged between the guide sleeve and the shaking rod. The shaking hammer mechanism is provided with a shaking locking device at least having a pin shaft connecting a shaking hammer and a connecting rod which are also fixed by a nut; the nut is formed by matching an inner nut and an outer nut which are adjacently screwed on the same pin shaft inwards and outwards. The mounting end face of one nut is provided with an outer tapered section, and the mounting end face of the other nut is provided with a corresponding inner tapered section. The dust shaking and cleaning device has advantages of a simple structure, convenient assembly, safe and reliable use, saving energy, uneasily being locked because of thermal expansion, preventing loosening and abrasion, good air tightness, good dust cleaning effect, stable and reliable running, a long service life, lowering operation cost etc.

Description

technical field [0001] The invention relates to a mechanical rapping device for removing dust accumulation on the heating surface of a boiler by continuous rapping, especially the mechanical rapping device for the heating surface of a cement kiln waste heat boiler, so as to ensure the heat transfer efficiency of the heating surface. Background technique [0002] Waste heat boilers, especially cement kiln waste heat boilers, have a very high dust content in the flue gas, and the flue gas temperature is below 400°C. How to effectively and continuously remove the dust on the heating surface is the key to the stable operation of this type of waste heat boiler. At present, this type of boiler has the following three cleaning methods: one is sonic cleaning, that is, sound waves of a certain frequency are emitted to the heating surface space at regular intervals, and the flue gas flow is strongly disturbed to achieve the effect of cleaning the heating surface. However, this method ...

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Problems solved by technology

At present, this type of boiler has the following three cleaning methods: one is sonic cleaning, that is, sound waves of a certain frequency are emitted to the heating surface space at regular intervals, and the flue gas flow is strongly disturbed to achieve the effect of cleaning the heating surface. However, this method of removing dust deposits cannot be continuously cleaned, and the effect of cleaning dust on different parts of the heating surface is very different, and there are many blind spots, and due to the large negative pressure of the boiler, a large amount of cold air will be brought in when emitting sound waves. Seriously affects the thermal efficiency of the boiler; in addition, the applied stress values ​​of different parts of the heating surface due to the sound wave vibration are very different, so that the anti-fatigue life is different; the second is the blasting cleaning method, its principle is similar to the sound cleaning Using a certain amount of explosive shock waves instead of sound waves, it also has the same disadvantages as the above-mentioned cleaning method, and the blasting force is difficult to control, and the local heating surface is easily damaged; the third is the mechanical vibration cleaning method, and its working principle is: The rapping hammer periodically hits the rapping rod that is in close contact with the heating surface to make the tube group on the heating surface vibrate as a whole, and the vibration mechanical wave is transmitted to each geometric point along the axial direction of the tube on the heating surface, so as to achieve the purpose of dust removal , which has the advantage that the generation and transmission of mechanical waves are evenly distributed in time and space, and has an extremely good cleaning effect; but the mechanical vibration cleaning mechanism is still immature, and there are many problems as follows: , easy to damage the heating surface; easy to cause jamming due to thermal expansion; there are problems with flexible sealing and durability; there are problems such as vibration anti-loosening and vibration wear, and it is urgent to improve in many aspects

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