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Rotary air preheater system and working method thereof

An air preheater, working method technology, applied in the direction of combustion method, lighting and heating equipment, combustion product treatment, etc.

Pending Publication Date: 2020-10-23
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] In order to improve the reliability of the rotary air preheater with two compartments, three compartments or four compartments, the technical problem to be solved by this invention is to separate the flue gas compartments of the air preheater, supplemented by corresponding settings There is a pipeline with a booster fan, providing a rotary air preheater system and its working method with lower air leakage rate and online removal of low-temperature sulfuric acid corrosion and clogging and ammonium bisulfate clogging functions

Method used

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  • Rotary air preheater system and working method thereof
  • Rotary air preheater system and working method thereof
  • Rotary air preheater system and working method thereof

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Embodiment

[0055] Such as figure 2 (forward rotation mode), Figure 5 , Figure 6 and Figure 7 ~ Figure 9 As shown, for a 600MW unit, the original design air preheater is a three-compartment rotary air preheater with a rotating heating surface (hereinafter referred to as the traditional three-compartment), which adopts a modular compartment structure, and the air preheater rotor is set There are heat exchange elements, and all heat storage elements are installed in 48 compartments, and the angle of the center of each compartment is 7.5°. After being modified by applying the present invention, its air preheater has a structure of double smoke chambers and quartered chambers, that is, the 24 chambers on the flue gas side are divided into two parts, one part is the unblocking smoke chamber 15, and the rotation direction of the flue gas side is divided into two parts. It consists of three modulus compartments at the end (smoke compartment number 22-24), the corresponding central angle θ...

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Abstract

The invention discloses a rotary air preheater system capable of lowering an air leaking rate and preventing blockage and a working method of the system. In the rotary air preheater system, a flue gasside bin cell of an air preheater is divided into a conventional smoke bin and an unblocking smoke bin which are independent of each other; according to the rotating direction of an air preheater rotor, the unblocking smoke bin is arranged at the steering tail end of the flue gas side; a first contact flue and a second contact flue are correspondingly connected between a cold end flue and a hot end flue of the conventional smoke bin and the unblocking smoke bin; a first control valve is arranged on the first contact flue; and an outlet flue is further connected with the cold end flue of the unblocking smoke bin through an exhausting flue provided with a booster fan. The system comprises two working modes of a conventional running mode and an online unblocking mode; and under the online unblocking mode, flue gas in the unblocking smoke bin and flue gas in the conventional smoke bin flow reversely. According to the rotary air preheater system, the blockage period of the air preheater can be effectively prolonged, and economic benefits are increased.

Description

technical field [0001] The present invention relates to a rotary air preheater, especially the design for preventing ammonium bisulfate from clogging. Background technique [0002] The rotary air preheater is an important heat exchange equipment for power plant boilers. It usually uses the rotor (including heat storage elements) to rotate, and the high-temperature flue gas and cold air are countercurrently heat-exchanged. When the flue gas flows through the rotor, the flue gas releases heat to the heat storage element, and the temperature of the flue gas is lowered to realize the utilization of the heat of the flue gas. When the heat storage element rotates to the air side, it releases heat to the air again, and the air temperature rises. The introduction of hot air into the furnace increases the efficiency of fuel combustion. For pulverized coal furnaces, part of the hot air is used for pulverized coal preparation and feeding. [0003] According to the number of compartm...

Claims

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Application Information

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IPC IPC(8): F23L15/04F23J3/02
CPCF23J3/02F23L15/04Y02E20/34
Inventor 黄雪飞聂立潘正权魏永贵董猛蒲亨林
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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