Sealing structure of air pre-heater, rotary air pre-heater and boiler

Abstract

The invention discloses a sealing structure of an air pre-heater, the rotary air pre-heater and a boiler, and belongs to the technical field of boilers. The sealing structure of the air pre-heater, the rotary air pre-heater and the boiler are designed to solve the problem that existing sealing parts can hardly arrive at optimal positions accurately. The sealing structure of the air pre-heater comprises a fixed support, a suspended self-locating sealing part and a locater, and a channel is arranged on the containing portion of the sealing part. A bearing sleeve, a hovering structure and a guidedisplacement bearing are arranged on a sealing part body, the sealing part body is arranged in the channel, and the hovering structure is configured to still keep the space posture when the bottom ofthe sealing part body is suspended. A penetrating type guide groove is formed in a locater body, the guide displacement bearing can penetrate through the guide groove, and therefore the sealing partbody is driven to arrive at the set space posture or space position. According to the sealing structure of the air pre-heater, the rotary air pre-heater and the boiler, the locating and supporting functions to the sealing part are better, the sealing part body can be kept at the ideal position, and the sealing effect of the sealing structure of the air pre-heater is improved.

Description

technical field [0001] The invention relates to the technical field of boilers, in particular to an air preheater sealing structure, a rotary air preheater including the air preheater sealing structure and a boiler including the rotary air preheater. Background technique [0002] When the rotary air preheater is running in a hot state, all parts of the air preheater will expand due to heat, the rotor will become mushroom-shaped, and the gap between the rotor and the fan-shaped plate and arc-shaped plate will change. Small. In the hot running state, if the gap is too large, the air leakage rate of the air preheater will be large; if it is too small, the air preheater may be stuck. [0003] Studies have shown that 1% air leakage rate affects coal consumption by 0.16 / kwh. In order to reduce the coal consumption of coal-fired power units, there is an air preheater seal that can adapt and self-adjust the spatial position, so that there is always a small gap between the air preh...

AI Technical Summary

Problems solved by technology

The structure is relatively simple, and the elastic deformation of the elastic part is difficult to control, which makes it difficult for the seal to reach the optimum position accurately, which in turn leads to poor sealing effect of the air preheater seal; when the seal is in place, it is difficult to maintain the optimum position for a long time. location

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