Combined combustion stabilizer capable of separating thick pulverized coal and thin pulverized coal and controlling concentration

Abstract

The invention relates to a combined combustion stabilizer capable of separating thick pulverized coal and thin pulverized coal and controlling the concentration. The combustion stabilizer is positioned at the four corners of a four-corner tangential boiler and comprises a first direct-current combustor, a second direct-current combustor and a pre-combustion chamber type rotational flow combustion stabilizer, pulverized coal nozzles of the pre-combustion chamber type combustion stabilizer, the first direct-current combustor and the second direct-current combustor are sequentially arranged from bottom to top along a hearth, pulverized coal inlets of the pre-combustion chamber type combustion stabilizer and the second direct-current combustor are connected through a bent pipe separator, the bent pipe separator comprises a bent pipe pulverized coal inlet, a separated thick pulverized coal outlet and a separated thin pulverized coal outlet, the pulverized coal inlet of the first direct-current combustor and the bent pipe pulverized coal inlet are both connected with a boiler front pulverized coal pipe, and a pulverized coal inserting plate door is arranged at the position, at the front end of a pipeline of the thick pulverized coal outlet, of the bent pipe separator. The combined combustion stabilizer has the advantages of being high in combustion stabilizing capacity, good in coal quality adaptability, high in rapid response capacity and capable of separating thick pulverized coal and thin pulverized coal and controlling the pulverized coal concentration.

Description

technical field [0001] The invention relates to the technical field of boiler combustion, in particular to a burner stabilizer, in particular to a combined burner stabilizer in which pulverized coal is concentrated and lightly separated and the concentration of pulverized coal is controllable. Background technique [0002] China is a large coal-fired country, and the total installed capacity of coal-fired power generation ranks first in the world. In recent years, with the adjustment of China's energy strategy, renewable energy power generation technologies such as wind power and photovoltaics have developed rapidly. The safe and stable operation of the system has brought adverse effects, and there are different degrees of abandoned wind and light in various places. In order to improve the consumption capacity of renewable energy, thermal power units that undertake more than 70% of the country's power generation must undertake the task of peak regulation. The goal of power ...

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Problems solved by technology

[0005] In the actual use process, the quality of the coal used varies greatly, the coal type is not single, and the phenomenon of blending is prominent

The minimum stable combustion load of the boiler without oil input is generally 50% BMCR, and the deep peak shaving ability is poor. When the load is low, it needs to add oil to support combustion, which affects the economic benefits of the unit. In addition, in the process of deep peak shaving, in order to ensure stable combustion in the furnace, the peak climbing time

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