Control method and control device of deep peak shaving boiler and thermal power generation system
A boiler control and peak shaving technology, applied in the control system, combustion method, controlled combustion and other directions, can solve problems such as fire extinguishing and loss of stability of combustion in the furnace, reduce heat loss, meet the needs of remote control, and avoid instability. Effect
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[0044] Example one
[0045] figure 1 This is a step flow chart of a method for controlling a deep peak shaving boiler provided in an embodiment of this application.
[0046] Such as figure 1 As shown, the method for controlling a deep peak-shaving boiler provided by this embodiment is applied to a boiler of a 600MW thermal power generation system. In order to achieve stable combustion of the boiler during low-load operation, it is necessary to ensure that the temperature in the furnace does not decrease, so that the fuel after entering the furnace can be continuously burned to maintain normal operation. Therefore, the deep peak shaving control method of this application specifically includes the following steps:
[0047] S1. When the boiler enters a low-load operation state, put in lignite as the main coal type.
[0048] When the unit is operating at low load, lignite is used as the main coal type for the furnace. Because lignite has a lower calorific value than bituminous coal, it c...
Example Embodiment
[0068] Example two
[0069] Figure 4 This is a structural block diagram of a deep peak shaving boiler control device provided in an embodiment of this application.
[0070] Such as Figure 4 As shown, the deep peak-shaving boiler control device provided in this embodiment is applied to a boiler of a 600MW thermal power generation system. In order to achieve stable combustion of the boiler during low-load operation, it is necessary to ensure that the temperature in the furnace does not decrease, so that the fuel after entering the furnace can be continuously burned to maintain normal operation. Therefore, the deep peak shaving control device of the present application specifically includes a coal charging control module 10 and an air volume control module 20.
[0071] The coal input control module is used to control the coal input equipment to input lignite as the main coal type when the boiler enters a low-load operation state.
[0072] When the unit is operating at low load, lignit...
Example Embodiment
[0100] Example three
[0101] This embodiment provides a thermal power generation system. The thermal power generation system at least includes a boiler provided with the deep peak-shaving boiler control device provided in the previous embodiment. The control device is used to input lignite as the main coal type when the boiler enters the low-load operation state; strictly control the primary air flow into the furnace, and control the primary air flow below 100t / h. Through the above measures, the fuel supply into the furnace can be stabilized, continuous combustion can be ensured and sufficient heat can be continuously released to maintain the temperature in the furnace, unnecessary heat loss can be reduced, and the temperature in the furnace will not drop, so that the boiler is at a low load During operation, the combustion can be stabilized, so as to prevent the combustion in the furnace from extinguishing due to instability.
[0102] In this application, the boiler control syst...
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