A Modeling Method for Optimal Control of Desulfurization and Denitrification Operation of Circulating Fluidized Bed Boiler
A circulating fluidized bed, desulfurization and denitrification technology, applied in design optimization/simulation, CAD numerical modeling, instruments, etc., can solve the problems of not being able to know the general change trend of the economy, cumbersome calculations, etc.
Active Publication Date: 2019-06-28
HEBEI HUADIAN SHIJIAZHUANG THERMOELECTRICITY
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Problems solved by technology
This method is cumbersome to calculate, and can only be calculated and compared one by one, and it is impossible to know the general change trend of the economy during the adjustment of the working conditions
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[0063] The scheme, principle and beneficial effects of the present invention will be further described below in conjunction with specific drawings and embodiments.
[0064] Such as figure 1 As shown, the embodiment: Take the 410t / h circulating fluidized bed boiler of the power plant to carry out the adjustment test with this method as an example, and calculate the objective function of each core index as follows:
[0065] 1. The objective function of the amount of limestone for dry desulfurization in the furnace is as follows:
[0066] due to F 1 (x,y)=x 1 +x 2 x+x 3 y+x 4 x 2 +x 5 xy+x 6 the y 2 ,
[0067] The coefficient x in the above objective function 1 、x 2 、x 3 、x 4 、x 5 、x 6 Calculated according to the following non-homogeneous linear equations, the non-homogeneous linear equations are as follows:
[0068]
[0069] Among them, the corresponding load values under the six working conditions are 300, 315, 330, 350, 370, and 400;
[0070] Correspon...
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The invention discloses a modeling method for circulating fluidized bedboiler desulfurization and denitrification operation optimization control and belongs to the field of desulfurization and denitrification control. First, furnace-inside dry desulfurization limestone use amount, urine use amount, furnace-inside wet desulphurization limestone use amount, and load and outlet SO2 concentration under different work conditions are collected, so relationships between the furnace-inside dry desulfurization limestone use amount, the urine use amount, the furnace-inside wet desulphurization limestone use amount, and the load and the outlet SO2 concentration; the above relationships are collected and calculated to achieve comprehensive energy consumption cost; an operation work condition upon overall optimal economic performance can be determined according to a trend of the comprehensive energy consumption cost changing with the load and the outlet SO2; and desulfurization and denitrification operation optimization can be adjusted. The modeling method for circulating fluidized bedboiler desulfurization and denitrification operation optimization control is advantageous in that ultra-low emission standard of boiler smoke can be met, and limestone and urea consumption amount can be effectively reduced; and dry desulfurization and wet desulfurization inside the furnace can be rationally dispatched and desulfurization electricity consumption can be reduced.
Description
technical field [0001] The invention relates to a modeling method for optimal control of desulfurization and denitrification operation of a circulating fluidized bed boiler, which belongs to the field of desulfurization and denitrification control. Background technique [0002] With the country's strict environmental protection requirements, the emission of flue gas pollutants from thermal power plants must meet ultra-low emission standards. For this reason, environmental protection facilities such as desulfurization, denitrification and dust removal are generally installed in circulating fluidized bed boiler units. Generally, there are environmental protection systems such as SNCR denitration system, calcium spraying dry desulfurization in the furnace, and wet desulfurization outside the furnace. On the premise of ensuring environmental protection requirements and unit safety, optimize the adjustment between desulfurization and denitrification to maximize the economical ef...
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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10
Inventor 郭明奎薛钢申彦杰刘灿起潘建文刘峰王瑞永耿印良张玉青陈军福
Owner HEBEI HUADIAN SHIJIAZHUANG THERMOELECTRICITY