Whole-year-operation steam energy cascading utilization coupled system and working method thereof
A coupling system and cascade technology, which is applied in the field of steam energy cascade utilization coupling system, can solve the problems of low operating hours, not fully utilizing the potential, and affecting the economic benefits of the system, so as to reduce coal consumption and plant power consumption rate and increase operating hours number, to achieve the effect of utilization
Pending Publication Date: 2018-08-31
HUANENG CLEAN ENERGY RES INST
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Problems solved by technology
However, the problem with this system is that the entire system invested, including the back pressure steam turbine and absorption heat pump, can only be used in the heating season, and the operating hours throughout the year are relatively low, which greatly affects the economic benefits of the system and does not give full play to its potential. own potential
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[0018] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0019] Such as figure 1 As shown, this embodiment is a cascade utilization coupling system of steam energy that operates throughout the year. The steam extracted from the medium and low pressure connecting pipe of the thermal power unit enters the back pressure steam turbine 1 to recover high-grade energy, and drives the generator to generate electricity through the coupling, and the generated energy is directly incorporated into the power system of the power plant. The exhaust steam from the back pressure steam turbine 1 is adjusted by the desuperheater 5 to meet the driving steam parameter requirements of the absorption heat pump 3, and then enters the absorption heat pump 3, and drives the absorption heat pump 3 to recover the heat of the low-grade heat source 4 for external supply. hot. During the heating season, the heat supplied by the a...
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Provided are a whole-year-operation steam energy cascading utilization coupled system and a working method thereof. The whole-year-operation steam energy cascading utilization coupled system is mainlyapplied to a heating unit and comprises a back-pressure steam turbine, an absorption-type heat pump, a low-pressure heater and the like. A main steam turbine extracts steam for heating through a medium-low pressure communicating pipe; a steam inlet of the back-pressure steam turbine is connected with a heating steam extracting pipeline of the main steam turbine; turbines of the steam turbines arepushed to rotate through the heat-supply steam, then an electricity generator is driven to generate electricity, high-grade energy of the steam is recovered, and the generated electricity quantity merges into an auxiliary power system; and the back-pressure turbine exhausts the steam to drive the absorption-type heat pump, and low-grade waste heat is recovered. In the heating season, the absorption-type heat pump heats heat network water and supplies heat to the outside; and in the non-heating season, through switching of a three-way valve, the absorption-type heat pump is used for heating partial condensed water to achieve heat recovery. By adopting the whole-year-operation steam energy cascading utilization coupled system, whole year operation of the back-pressure steam turbine and cascading utilization of the steam are achieved, coal consumption is reduced, the auxiliary power rate is decreased, and the unit economical efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of back pressure machines and heat supply. Specifically, the invention particularly relates to a year-round steam energy cascade utilization coupling system and working method. Background technique [0002] my country's energy utilization efficiency is low, which seriously restricts my country's economic development and social progress. In the face of the country's major strategic needs for energy conservation and emission reduction, it is imperative to develop new technologies for efficient energy utilization and low emissions. In combined heat and power units, in order to improve energy utilization and realize cascaded utilization of energy, the main steam turbine is generally used to extract steam for heat supply. However, as the operating parameters of the main steam turbine are getting higher and higher, the temperature of the main steam turbine for heating and extracting steam is often higher than the...
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Login to View More IPC IPC(8): F24D19/10
CPCF24D19/1003
Inventor 李启明陈锋张学海钟迪周贤黄中王保民
Owner HUANENG CLEAN ENERGY RES INST