System and matching method for thermal power generating unit high-pressure heater novel steam source wide-load efficiency enhancing and denitrification technology
A technology of high-voltage heaters and thermal power units, which is applied to feed water heaters, lighting and heating equipment, and preheating. The effect of load denitrification requirements
Inactive Publication Date: 2018-03-23
程晋瑞
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However, when the unit operates below 50% BMCR, the inlet smoke temperature of the SCR reactor will be lower than the minimum operating temperature of the catalyst. Some power plants will also have low smoke temperature when the load is above 50% BMCR, resulting in denitrification system Efficiency drops, or even out of operation, reducing the operation rate of the denitrification system
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[0022] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0023] see figure 1 , the thermal power unit high-pressure heater new steam source wide-load efficiency improvement and out-of-stock technical system provided by the present invention includes a boiler 100 , a jet heat pump 200 and a high-pressure heater 300 .
[0024] The boiler 100 is equipped with a boiler superheater 110, an economizer 120, and an SCR denitrification system 130. The flue gas entering the boiler 100 first passes through the boiler superheater 110 and the economizer 120 in sequence, and then passes through the denitrification system 130 for denitrification. .
[0025] The jet heat pump 200 is provided with a first steam inlet and a second steam inlet on it, the first steam inlet is directly connected to the boiler superheater...
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The invention discloses a thermal power unit high-pressure heater new steam source wide-load efficiency improvement and out-of-stock technical system and matching method. The efficiency-improvement and out-of-stock technical system includes a jet heat pump, and the steam inlets of the jet heat pump are respectively connected to boilers through pipelines The superheater and steam turbine extraction steam outlet; the high-pressure heater, the steam inlet of the high-pressure heater is connected to the steam outlet of the jet heat pump through a pipeline, and the matching method includes the following steps: (1) directly extract the boiler through the jet heat pump The boiler superheated steam of the superheater and the steam turbine extract steam, and form the heated fresh steam source; (2) The jet heat pump directly transports the formed heated fresh steam source to the high-pressure heater, and directly sends the high-pressure heater to the coal-saving The feed water of the device is heated. The invention not only enables the unit to have the ability to operate efficiently during the low-load period, but also satisfies the flue gas temperature requirements of the denitrification system during the low-load period of the unit, and truly realizes the energy-saving and environmental protection upgrade of the power station and the group.
Description
technical field [0001] The invention relates to a thermal power unit wide-load high-pressure heater, in particular to a thermal power unit high-pressure heater new steam source wide-load efficiency improvement and out-of-stock technical system and matching method. Background technique [0002] Under the current economic situation, the contradiction that the power production capacity is greater than the market demand for electricity has become increasingly prominent. The actual operating point of most units is far from the design point, and the high load is reduced to low load operation. The unit needs to have the ability to adjust the operation of wide load. Environmental protection pressure and policy requirements make it imperative to implement energy-saving upgrades for thermal power plant units. Since the minimum steady combustion load of the boiler design is generally 30% to 40% BMCR. However, when the unit operates below 50% BMCR, the inlet smoke temperature of the SC...
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Login to View More IPC IPC(8): F22D1/32
CPCF22D1/325
Inventor 程晋瑞
Owner 程晋瑞