Rotating air preheater preventing mushroom deformation of rotor
An air preheater, rotary technology, used in lighting and heating equipment, combustion methods, indirect carbon dioxide emission reduction, etc., can solve the problem that the rotor deformation cannot reach the reserved gap, the gap is too large, and the air leakage rate High-level problems, to achieve the effect of easy implementation of production and renovation construction, solving the problem of enlarged cold end clearance and reduced leakage loss
Inactive Publication Date: 2015-07-08
彭玉林
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Problems solved by technology
However, since the deformation between the rotor and the fan-shaped plate has a certain radian, the reserved gap should not be too small, otherwise it will cause stagnation during operation, which will cause scratches between the rotor and the fan-shaped plate, which will affect the normal operation of the equipment; and If the gap is too large and cannot be sealed well, the air leakage during hot operation will be large
The thermal power unit operates at a load rate of 50-80% most of the time, the temperature rise does not reach the predetermined value, the deformation of the rotor does not reach the reserved clearance, the gap between the cold end of the rotor and the sector plate at the cold end is large, and the air leakage rate is high
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[0012] Such as figure 1 , figure 2 , image 3 As shown, its structure is: the hot-end horizontal plate 6 and the hot-end horizontal plate 6 are connected through the hot-end horizontal plate grid frame 5, and are connected with the central cylinder 1 as a whole, suspended in the air at the rotor hot-end partition 8 Above, the hot-end sealing sheet 3 is fixed on the hot-end horizontal plate 6 by the hot-end sealing sheet fixing screw 4; the hot-end horizontal plate 6 and the hot-end compartment partition 8 are sealed by the hot-end expansion joint 7; due to the radial The hot-end horizontal plate 6 is an isothermal zone above the heat storage element 13, so the hot-end horizontal plate 6 will not be deformed, and the hot-end sealing sheet 3 is fixed on the hot-end horizontal plate 6 by the hot-end sealing sheet fixing screw 4, Also maintain the horizontal flat state; the hot end compartment partition plate 8 of the rotor, the cold end compartment partition plate 15 heat stor...
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The invention relates to a structure of a rotating air preheater with a rotor having no mushroom deformation along with the rise of temperature, in particular to a sealing device of a rotor and a sector plate in a rotating air preheater, and belongs to the technical field of heat exchange equipment in thermal power plant set boilers. The rotor, having no mushroom deformation, of the rotating air preheater comprises an independent heat end transverse flat plate, a heat end extension joint, a separation bin spacing plate, an independent cold end transverse flat plate and a cold end extension joint. The device effectively eliminates a triangular air leaking area between a rotor and a sector plate caused by the mushroom deformation of the rotor; and as heat and cold end sealing pieces of the rotor are always kept in a horizontal state, the problems of enlarging of the cold end gap and increasing of the air leaking rate in low load of the set are specifically solved and the leaking loss is greatly decreased; the structure is simple, and the manufacturing and transforming construction is easy to perform.
Description
technical field [0001] The invention relates to a structure in which the rotor of a rotary air preheater does not undergo "mushroom deformation" as the temperature rises, specifically relates to the sealing device between the rotor and the fan-shaped plate in the rotary air preheater, which belongs to the unit boiler of a thermal power plant In the technical field of heat exchange equipment. Background technique [0002] The rotary air preheater is a heat exchange device that uses the hot flue gas discharged from the tail of the coal-fired boiler in the thermal power plant to heat the cold air and then enters the boiler to support combustion. It is widely used in modern large-capacity boilers. Due to the rotating parts of the rotary air preheater, there are gaps between the rotor and the sector plate and between the rotor and the arc plate, and at the same time there is a large pressure difference between the air side and the flue gas side of the preheater, which brings The...
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IPC IPC(8): F23L15/00
CPCY02E20/34
Inventor 彭玉林
Owner 彭玉林