Combined cycle heat and power cogeneration system and its high exhaust steam extraction control method
A combined heat and power, combined cycle technology, applied in the field of steam turbines, can solve the problems of high-quality energy waste and low efficiency, and achieve the effect of reducing energy waste and improving internal efficiency
Active Publication Date: 2017-12-12
SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD +1
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Problems solved by technology
[0005] However, the existing steam extraction conditions of the combined heat and power combined cycle system still have the problems of low efficiency in the unit and waste of high-quality energy. There is an urgent need for a steam extraction control and protection method suitable for high-emission steam extraction systems to improve In-unit efficiency, reducing high-quality energy waste
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[0028] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, not to limit the present invention.
[0029] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the inventio...
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The invention relates to the technical field of steam turbines, in particular to a combined cycle heat and power cogeneration system and its high-exhaust steam extraction control method. A high-pressure exhaust steam pressure measuring point is set at the exhaust port of a high-pressure cylinder, and steam extraction is adjusted on the steam extraction pipeline. Set the extraction pressure measuring point behind the valve, and set the medium pressure inlet pressure measuring point before the medium pressure steam inlet valve group on the medium pressure steam inlet pipeline; under the steam extraction condition, the extraction pressure is determined by the heat supply demand of the heating network The set value is determined by the actual pressure value measured at the high-pressure exhaust steam measuring point to determine the set value of the medium-pressure inlet steam pressure. Adjust the opening of the extraction control valve and / or adjust the opening of the medium pressure inlet valve group according to the set value of the medium pressure inlet steam pressure and the actual pressure value measured at the medium pressure inlet steam pressure measuring point, so that The actual pressure value at the extraction pressure measuring point reaches the set value of the extraction pressure. It can effectively improve the efficiency of the unit and reduce the waste of high-quality energy.
Description
technical field [0001] The invention relates to the technical field of steam turbines, in particular to a combined cycle heat and power cogeneration system and a high exhaust steam extraction control method thereof. Background technique [0002] The steam turbine is one of the key power equipment in the construction of a power station, and it is an energy conversion device that converts thermal energy into mechanical energy and then into electrical energy. The high-temperature and high-pressure steam produced by the boiler converts the thermal energy and pressure potential energy into the mechanical energy of the steam turbine through the steam turbine, and drives the output shaft of the steam turbine rotor to do work. The mechanical energy is transmitted to the generator through the output shaft of the steam turbine rotor, thereby converting the mechanical energy into electrical energy . [0003] The gas-steam combined cycle refers to using the gas turbine as a pre-turbine...
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IPC IPC(8): F01K7/24F01K7/28F01K17/02F01D17/10
CPCY02E20/14Y02P80/15
Inventor 彭运洪刘冰张立建金光勋王伟刘政委邹荣贵倪庆新程雁菁刘晓强
Owner SHANGHAI ELECTRIC POWER GENERATION EQUIPMENT CO LTD