Ultra-low-load operation system and operation method for coal-fired generating units

A generator set and coal-fired technology, which is applied in the direction of machines/engines, mechanical equipment, steam engine devices, etc., can solve the problems of denitrification reactor exhaust gas temperature drop performance deterioration, boiler combustion instability, coal mill instability, etc., to achieve Guarantee the efficiency of denitrification catalytic reaction, alleviate the pressure of peak regulation, and shorten the time of start-up and operation

Inactive Publication Date: 2018-03-02
SOUTHEAST UNIV +1
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Problems solved by technology

[0005] Purpose of the invention: The present invention proposes a coal-fired power generation unit system to solve the problems of boiler combustion instability, coal mill instability, and denitrification reactor performance deterioration due to the drop in exhaust gas temperature when the coal-fired unit is operating at an ultra-low load.

Method used

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  • Ultra-low-load operation system and operation method for coal-fired generating units
  • Ultra-low-load operation system and operation method for coal-fired generating units

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Embodiment Construction

[0026] Such as figure 1 As shown, a coal-fired generating set system is composed of a main generating set and an auxiliary generating set. A typical structure of a low-pressure heater and a deaerator.

[0027]The structure of the main generating set is that the boiler 100 is connected to the main steam valve 600, the main steam valve 600 is connected to the high pressure cylinder 200 of the steam turbine, the high pressure cylinder is connected to the reheater 110, the reheater 110 is connected to the medium pressure cylinder inlet valve 700, and the medium pressure cylinder is connected to the steam inlet valve 700. The steam valve 700 is connected to the medium pressure cylinder 210, the medium pressure cylinder 210 is connected to the low pressure cylinder 220, the low pressure cylinder and the condenser 300, the condenser 300 is connected to the condensate pump 520, and the condensate pump 520 is connected to the regenerative heater 470. The regenerative heater of steam t...

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Abstract

The invention discloses an ultra-low-load operation system and an operation method for coal-fired generating units. The system is composed of two coal-fired generating units which operate in a unifiedmode, and each coal-fired generating unit consists of a steam turbine, a steam system, a vacuum air exhaust system, a condensed water system and a water feeding system; the steam systems of the generating units are connected through a heat steam connecting tube; and the water feeding systems of the generating units are connected through a water feeding connecting tube. The ultra-low-load operation system concentrates steam outlet force when the two units operate under ultra-low load on a main boiler, and solves the problems that boiler consumption is unstable, a coal mill, a fan and a denitrification reactor are unstable and the like when current coal-fired generating unit operates under the ultra-low load, and greatly improves safety and reliability of boiler operation control.

Description

technical field [0001] The invention relates to a coal-fired generating set and an operation method, in particular to a coal-fired generating set system and an operating method capable of ultra-low load operation. Background technique [0002] With economic development, changes in power consumption and power consumption structure, the peak-to-valley difference in power grids continues to increase. China's current power structure dominated by thermal power and few energy storage peak-shaving power stations leads to insufficient peak-shaving capacity of the power grid. In order to support the development of renewable energy, the current method is to arrange a certain scale of coal-fired power generation units for peak regulation of renewable energy. The pressure of deep peak regulation of traditional thermal power units has further increased. [0003] In order to solve the peak-shaving problem of thermal power units, a variety of technologies have been developed at home and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K13/02F01K11/02F01D15/10
CPCF01D15/10F01K11/02F01K13/02
Inventor 杨建明姜清尘周前徐珂解兵张宁宇
Owner SOUTHEAST UNIV
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