Three-level bypass control system and control method thereof
A technology of control system and three-stage bypass, which is applied in the direction of steam engine device, machine/engine, mechanical equipment, etc.
Active Publication Date: 2015-04-22
CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST +1
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[0004] The purpose of the present invention is to provide a three-stage bypass control system for a double reheat unit and a control method for the three-stage bypass control system, so as to solve the problem of safe and reliable operation of the double reheat unit
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[0019] 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.
[0020] Such as figure 1 As shown, the secondary reheat unit includes a superheater 14 , a primary reheater 15 and a secondary reheater 16 . The three-stage bypass control system includes a high-voltage bypass 11 , a medium-voltage bypass 12 , and a low-voltage bypass 13 . The high-pressure bypass 11 is in fluid communication with the superheater 14 and the primary reheater 15, the medium-pressure bypass 12 is in fluid communication with the primary reheater 15 and the secondary reheater 16, and the low-pressure bypass 13 is in fluid communica...
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The invention discloses a three-level bypass control system applied to a secondary reheating unit and a control method of the three-level bypass control system. The secondary reheating unit comprises a boiler, a superheater, a primary reheater, a secondary reheater and a condenser. The three-level bypass control system comprises a high-pressure bypass, a middle-pressure bypass and a low-pressure bypass, wherein the high-pressure bypass is in fluid communication with the superheater and the primary reheater; the middle-pressure bypass is in fluid communication with the primary reheater and the secondary reheater; the low-pressure bypass is in fluid communication with the secondary reheater and the condenser, and therefore different operation modes of the high-pressure bypass or the middle-pressure bypass or the low-pressure bypass can be started when triggering conditions of the high-pressure bypass or the middle-pressure bypass or the low-pressure bypass are satisfied. According to the three-level bypass control system applied to the secondary reheating unit and the control method of the three-level bypass control system, the operation safe reliability of the secondary reheating unit can be greatly improved.
Description
technical field [0001] The invention relates to the field of thermal power generation, in particular to a three-stage bypass control system for a double reheat unit. Background technique [0002] The system of the double reheat unit is huge and complex, and the initial investment is high, but the unit efficiency is high, which is the development direction of high-efficiency and clean coal power. [0003] However, there is no double reheat unit put into operation in my country, let alone a mature bypass control system for double reheat unit. For large unit units in modern power plants, the bypass system and its control system play an important role in the process of starting and stopping, normal operation, and troubleshooting of the unit. Due to the existence of the primary reheater and the secondary reheater, the secondary reheat unit must be equipped with high, medium and low three-stage bypasses. The three-stage bypass control system is complex, and the control complexity...
Claims
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IPC IPC(8): F01K3/18F01K7/02F01K13/02
Inventor 李林姚峻包一鸣侯新建沈从奇祝建飞胡金伟钱非杭莉莉田倩
Owner CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST