A kind of control method and control system of feed water pump steam turbine
A feedwater pump steam turbine and control system technology, applied to mechanical equipment, engine components, machines/engines, etc., can solve the problems of small steam turbine exhaust pressure rising, small steam turbine output can not meet the requirements, etc., to achieve simple operation process, easy to solve The effect of increasing the back pressure of the condenser
Inactive Publication Date: 2017-10-31
HUADIAN POWER INTERNATIONAL CORPORATION LTD +2
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Problems solved by technology
Huadian Shandong Qingdao Co., Ltd. #2 power unit after the high back pressure heating transformation, the back pressure of the condenser of the unit increased, and the exhaust pressure of the small steam turbine increased during high back pressure operation, so the output of the small steam turbine could not meet the requirements
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[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description is only for demonstration and explanation, and does not limit the present invention in any form.
[0031] In order to realize the safety and economy of feedwater pump steam turbine operation under the premise of thermal process in heating period and non-heating period, the cold recovery is used as the steam source of small machine in the heating period (that is, high back pressure condition), and the non-heating period (i.e. pure condensing condition) use four pumps as the steam source of the small machine, such as figure 1 As shown, the operation method of the feedwater pump steam turbine suitable for heating and pure condensing dual mode includes the following steps: S1, replace the rotor and cylinder of the small steam turbine of the existing power unit to meet the two requirements of high back pressure and pure cond...
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The invention discloses a control method and control system for a steam turbine of a feed water pump. In high back pressure working conditions, a separate manual operator is added to the pipeline valve, and the logic of opening the pipeline valve only when the low-pressure valve is fully opened is removed, so that the small steam turbine runs When the load of the generating set is brought to the cold repressure to meet the requirements, the operating personnel will manually switch the steam source of the small steam turbine. Under the high back pressure operation condition, the small steam turbine only uses the cold res The auxiliary steam source is isolated, and after the opening of the pipeline valve is fully opened or opened to a fixed opening, the speed of the small steam turbine is still controlled by the main regulating valve of the small steam turbine. The feedwater pump steam turbine control method and control system for heating and pure condensing dual modes of the present invention can realize the safety and economical requirements for the operation of the feedwater pump steam turbine under the premise of the thermal process in the heating period and the non-heating period .
Description
technical field [0001] The invention relates to the technical field of feedwater pump turbines, in particular to a control method and control system for feedwater pump steam turbines in dual modes of heat supply and pure condensation for power plant equipment. Background technique [0002] The feedwater pump turbine is one of the main components of the thermal cycle system of the power station, especially in the ultra-supercritical unit with high parameters and large capacity. Its safe and reliable operation directly affects the operation of the entire power station equipment. The working task of the feedwater pump steam turbine is to drive the feedwater pump, which must meet the water supply requirements required by the boiler. The steam for the feedwater pump steam turbine is supplied by high-pressure steam source or low-pressure steam source. The steam in the cold section), the low-pressure steam source comes from the fourth section of the main engine, and the steam is di...
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IPC IPC(8): F01D21/00F01D15/08
Inventor 黄鹏刘克军苏振勇宋岩王修成姜维军宋海宾李从国王刚高鹏
Owner HUADIAN POWER INTERNATIONAL CORPORATION LTD