Raw coal bunker structure of direct-fired pulverizing system and deep peak regulation method

Abstract

The invention discloses a raw coal bunker structure of a direct-fired pulverizing system and a deep peak regulation method. The structure comprises multiple groups of raw coal bunker units; coal typeswith different levels of volatile components and heat values are stored in the different raw coal bunker units; each raw coal bunker unit comprises a storage bunker, the storage bunker is connected with a coal feeder through a blending bunker, the storage bunker communicates with the blending bunker through a coal discharging pipe, the blending bunker communicates with the coal feeder through a coal falling pipe, and coal gates are arranged on the coal discharging pipe and the coal falling pipe; and the blending bunkers among the different raw coal bunker units communicate through screw conveyor devices. According to the deep peak regulation method for the raw coal bunker structure of the direct-fired pulverizing system, coal quality can be rapidly and flexibly allocated according to changes of unit loads and combustion conditions, and thus the flexible peak regulation capacity of the unit is improved.

Description

technical field [0001] The invention belongs to the field of coal-fired power plant boilers, and relates to a raw coal bunker structure and a deep peak-shaving method of a direct blowing type pulverizing system. Background technique [0002] With the clean reform of the energy structure, the installed capacity of new energy power stations such as wind power and photovoltaics has grown rapidly. However, new energy has the characteristics of randomness, intermittent, and instability. Cause adverse effects, resulting in a more serious phenomenon of abandoning wind and light. In response to the problem of new energy consumption, the National Energy Administration proposed to fully tap the peak-shaving capacity of the existing system to enhance the flexibility and adaptability of the system. Power grids in various regions have issued operating rules for the power peak shaving auxiliary service market, formulated relevant peak shaving subsidy policies, and guided coal-fired therm...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the structure of the raw coal bunker in the prior art cannot be flexibly blended according to the change of the load of the unit, and to provide a raw coal bunker structure and a deep peak-shaving method for a direct blowing pulverizing system. It can quickly and flexibly allocate coal quality according to changes in unit load and combustion conditions, and improve the flexibility and peak-shaving capability of the unit

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