Three-section reversible air pre-heater and method for removing blockage
A technology of air preheater and flow direction, which is applied in the direction of combustion method, indirect heat exchanger, clean heat transfer device, etc. It can solve the problems of air leakage, energy consumption and maintenance workload, etc., so as to reduce workload, reduce energy consumption, improve The effect of heat transfer efficiency
Pending Publication Date: 2022-06-28
SHANGHAI YIFENG ELECTRICAL & MECHANICAL TECH DEV
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Problems solved by technology
[0014] For this reason, an object of the present invention is to propose a three-stage reversible air preheater to solve the problems of air leakage, energy consumption and heavy maintenance workload
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[0029] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.
[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implyin...
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The invention relates to a three-section reversible air pre-heater and a blockage removing method. The air pre-heater comprises an upper-layer channel, a middle-layer channel and a lower-layer channel which are isolated from one another and do not communicate with one another. The heat pipes sequentially penetrate through the upper-layer channel, the middle-layer channel and the lower-layer channel from top to bottom to serve as heat conduction elements. Hot flue gas flows from one end to the other end in the lower-layer channel, and cold flue gas is formed through heat exchange of the heat pipes; the cold primary air and the cold secondary air flow in the middle-layer channel and the upper-layer channel in the direction opposite to the flowing direction of the hot flue gas correspondingly and form hot primary air and hot secondary air through heat pipe heat exchange. The upper-layer channel, the middle-layer channel and the lower-layer channel which are isolated from one another and not communicated with one another do not need to be communicated, and the air leakage problem is solved. The multiple heat pipes sequentially penetrate through the upper-layer channel, the middle-layer channel and the lower-layer channel from top to bottom to serve as heat conduction elements and heat storage elements without rotation, energy consumption is reduced, energy is saved, the structure is simple, maintenance and overhaul are easy, and the maintenance workload is reduced.
Description
technical field [0001] The invention relates to the technical field of gas heat exchange, in particular to a three-stage reversible air preheater and a method for removing blockage. Background technique [0002] The air preheater is a kind of preheating equipment that improves the heat exchange performance of the boiler and reduces the heat loss. The function of the air preheater is to conduct the heat carried in the flue gas discharged from the flue at the tail of the boiler to the air before entering the boiler through the heat sink, and preheat the air to a certain temperature. At present, most of the air preheaters of coal-fired power station boilers are rotary air preheaters. Take the three-silo rotary air preheater as an example. The three-silo rotary air preheater is a regenerative air preheater. When the rotor rotates, the flue gas Alternately flow through the heat storage element with the air. When the flue gas flows, the heating surface absorbs heat, and then tran...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F23L15/04F23J15/06F28D15/02F28F27/00F28G13/00
CPCF23L15/04F23J15/06F28D15/02F28F27/00F28G13/005Y02E20/34
Inventor 冯毅李大正
Owner SHANGHAI YIFENG ELECTRICAL & MECHANICAL TECH DEV