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Secondary reheating set and asynchronous control method for reheating steam temperature of secondary reheating set

A steam temperature, secondary reheating technology, applied in the control of superheat temperature, steam superheat, steam generation, etc., can solve the problem that the outlet steam temperature cannot be quickly balanced, and achieve the effect of correcting the imbalance

Active Publication Date: 2014-09-03
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for controlling the outlet steam temperature of a reheater, which can avoid problems such as the outlet steam temperature cannot be quickly balanced caused by the existing control method

Method used

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  • Secondary reheating set and asynchronous control method for reheating steam temperature of secondary reheating set
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  • Secondary reheating set and asynchronous control method for reheating steam temperature of secondary reheating set

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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the essence of the technical solutions of the present invention.

[0033] Terminology Explanation

[0034] BMCR: Refers to the maximum continuous evaporation capacity of the boiler, mainly the maximum output under the condition of satisfying the steam parameters and the safety of the furnace.

[0035] In the reheat steam temperature control process of the double reheat unit, the reheat steam temperature is usually controlled by changing the burner swing angle, flue gas baffle and / or spraying water to reduce temperature. Among them, the swing angle of the burner is the main adjustment method for the steady st...

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Abstract

The invention discloses a secondary reheating set and an asynchronous control method for a reheating steam temperature of the secondary reheating set. The secondary reheating set comprises a combustor, a primary re-heater, a smoke baffle at the primary re-heater side, a secondary re-heater and a smoke baffle at the secondary re-heater side. The method comprises the following steps: measuring outlet steam temperatures of the primary re-heater and the secondary re-heater; simultaneously and respectively carrying out reversed adjustment on the smoke baffle at the primary re-heater side and the smoke baffle at the secondary re-heater side when the outlet steam temperatures of the re-heaters are abnormal and are not higher or lower at the same time; and simultaneously locking the smoke baffle at the primary re-heater side and the smoke baffle at the secondary re-heater side when the outlet steam temperatures of the primary re-heater and the secondary re-heater are higher or lower at the same time. According to the secondary reheating set and the asynchronous control method for the reheating steam temperature of the secondary reheating set, the problem that the smoke baffles can not be controlled when the outlet steam temperatures of the re-heaters are higher or lower at the same time is solved; the unbalance of the outlet steam temperatures of the primary re-heater and the secondary re-heater can be rapidly revised.

Description

technical field [0001] The invention relates to power generation equipment, in particular to reheat steam control of a double reheat unit. Background technique [0002] At present, the first reheating system of a boiler factory's 1000MW double reheating unit is arranged in series with two heating surfaces, and the second reheating system is arranged in series with two heating surfaces. The high-temperature reheaters of the first reheating system and the second reheating system are respectively arranged in the high smoke temperature area, arranged along the flow, and the characteristics of the heating surface are semi-radiant. [0003] In order to improve heat exchange efficiency and ensure the safety of the heating surface, the high-temperature reheater is divided into a low-temperature section and a high-temperature section. The low-temperature section is arranged at the front of the high-temperature superheater, and the high-temperature section is arranged at the rear of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22G5/04F22G7/00
Inventor 李林姚峻包一鸣侯新建沈丛奇祝建飞胡金伟张翼
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST
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