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Ash blocking prevention system of reheating primary air recirculation rotary air preheater

An air preheater and reheating technology, applied in indirect heat exchangers, heat exchanger types, lighting and heating equipment, etc. amount of effect

Pending Publication Date: 2021-01-29
XIAN THERMAL POWER RES INST CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the common ash blocking problem of rotary air preheater in current coal-fired generating units, the present invention provides a reheating primary air recirculation rotary air preheater ash blocking prevention system

Method used

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  • Ash blocking prevention system of reheating primary air recirculation rotary air preheater

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 1 As shown, a reheating primary air recirculation rotary air preheater anti-clogging system provided by the present invention includes a primary air heater 4, a first flue 3 connected to the primary air heater 4, and a second flue 6. The first air duct 12 and the second air duct 5, the original primary air duct 24, the rotary air preheater 19, and the opening and closing doors and regulating doors installed on the smoke and air ducts.

[0026] The first flue 3 is connected to the flue gas inlet end of the boiler rear steering chamber 1 and the primary air heater 4, and the first switch door 4 is installed on the first flue 3, and the first switch door 4 can also be installed on the first flue 3 in some cases. On the second flue 6. According to actual needs, the interface between the first flue 3 and the boiler can also choose a certain position ...

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Abstract

The invention discloses an ash blocking prevention system of a reheating primary air recirculation rotary air preheater and aims at solving the problem of rotary air preheater ash blocking generally existing in an existing thermal generator set. The ash blocking prevention system comprises a primary air heater, an original primary air duct, a first flue, a second flue, a first air duct and a second air duct, and the first flue, the second flue, the first air duct and the second air duct are connected with the primary air heater. An inlet of the first flue is connected with a boiler rear vertical shaft flue, an outlet of the first flue is connected with a flue gas inlet end of the primary air heater, an inlet of the second flue is connected with the flue gas outlet end of the primary air heater, an outlet of the second flue is connected with a boiler SCR system inlet flue, and an inlet of the first flue is connected with the original primary air duct. An outlet of the first air duct isconnected with the air inlet end of the primary air heater, the air outlet end of the primary air heater is connected with an inlet of the second air duct, and an outlet of the second air duct is connected with a reheating primary air inlet of the air preheater.

Description

technical field [0001] The invention belongs to the technical field of boiler flue gas waste heat recovery equipment for power plants, and in particular relates to a reheating primary air recirculation rotary air preheater anti-clogging ash system, which is suitable for air preheaters when thermal power generating units participate in power grid peak regulation and low load operation Anti-clogging ash. Background technique [0002] The air preheater is the key equipment for waste heat recovery of power plant boilers, among which large (300MW and above) power plant boilers are equipped with rotary air preheaters. As the country's requirements for environmental protection indicators increase, basically all power plant boilers are equipped with denitrification systems, and as the country's requirements for energy consumption indicators become higher and higher, the exhaust gas temperature of boilers is also getting lower and lower. After the denitrification system is put into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/00F23J15/06F28F27/00F28D20/00
CPCF23J15/06F23L15/00F28D20/00F28F27/00Y02E20/34Y02E60/14
Inventor 张喜来姚伟方顺利王志超王桂芳周广钦郝震彪李宇航杜智华贾子秀
Owner XIAN THERMAL POWER RES INST CO LTD
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