Soft measurement method and optimal control method of sulfur dioxide in circulating fluidized bed boiler smoke
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A circulating fluidized bed, sulfur dioxide technology, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the problems of sulfur dioxide concentration hysteresis, inability to adjust the control effect, etc.
Inactive Publication Date: 2013-07-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0014] The purpose of the present invention is to provide a soft measurement and optimal control method for sulfur dioxide in circulating fluidized bed boiler flue gas, which can effectively solve t
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Embodiment 1
[0127] Embodiment 1: a kind of soft measurement method of sulfur dioxide in flue gas of circulating fluidized bed boiler, comprises the following steps:
[0128] S1, collect the operating data of the actual industrial device, and construct the soft sensor model of the active limestone in the furnace:
[0129] dM C dt = W ca * η W c F 1 ( t ) - K F 0 M C
[0130] Among them, W ca is the molar mass of calcium oxide, kg / kmol; W c is the molar mass of limestone, kg / kmol; Mc is the amount of active limestone in the furnace, kg; F1 is the limestone feed, kg / s; η is the pure CaCO contained in the limestone f...
Embodiment 2
[0161] Embodiment 2: a kind of soft measurement method of sulfur dioxide in flue gas of circulating fluidized bed boiler, comprises the following steps:
[0162] S1, collect the operating data of the actual industrial device, and construct the soft sensor model of the active limestone in the furnace:
[0163] dM C dt = W ca * η W c F 1 ( t ) - K F 0 M C
[0164] Among them, W ca is the molar mass of calcium oxide, kg / kmol; W c is the molar mass of limestone, kg / kmol; Mc is the amount of active limestone in the furnace, kg; F1 is the limestone feed, kg / s; η is the pure CaCO contained in the limestone f...
Embodiment 3
[0170] Embodiment 3: a kind of soft measurement method of sulfur dioxide in flue gas of circulating fluidized bed boiler, comprises the following steps:
[0171] S1, collect the operating data of the actual industrial device, and construct the soft sensor model of the active limestone in the furnace:
[0172] dM C dt = W ca * η W c F 1 ( t ) - K F 0 M C
[0173] Among them, W ca is the molar mass of calcium oxide, kg / kmol; W c is the molar mass of limestone, kg / kmol; Mc is the amount of active limestone in the furnace, kg; F1 is the limestone feed, kg / s; η is the pure CaCO contained in the limestone f...
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Abstract
The invention discloses a soft measurement method and an optimal control method of sulfur dioxide in circulating fluidized bed boiler smoke. The soft measurement method of the sulfur dioxide in the circulating fluidized bed boiler smoke includes the following steps: (1) collecting operational data of a practical industrial device, and constructing a soft measurement model of activated limestone in a furnace; (2) constructing a soft measurement model of emission concentration of the sulfur dioxide in an outlet of the furnace combining with coal feeding quantity according soft measurement value of the activated limestone in the furnace; and (3) controlling a limestone feeding machine to adjust limestone feeding quantity according feedback of soft measurement value of the emission concentration of the sulfur dioxide in the outlet of the furnace, and guaranteeing that the emission concentration of the sulfur dioxide meets a criterion. Due to the fact that the soft measurement model of the activated limestone in the furnace is established, and the soft measurement model of the emission concentration of the sulfur dioxide in the outlet of the furnace is established according to the soft measurement value of the activated limestone and the coal feeding quantity, the emission concentration of the sulfur dioxide in the outlet of the furnace is forecasted, the limestone feeding quantity can be beforehand feed back and adjusted, and functions of adjustment and control are fundamentally achieved.
Description
technical field [0001] The invention relates to a soft measurement and optimization control method for sulfur dioxide in flue gas of a circulating fluidized bed boiler, belonging to the technical field of circulating fluidized bed boilers. Background technique [0002] The current technologies for controlling sulfur dioxide emissions in boiler combustion can be divided into three categories: the first is the removal of sulfur contained in coal before combustion, such as coal washing, biological desulfurization technology, etc. Control; the second is to control the generation of sulfur dioxide during the combustion process, such as the desulfurization technology in the circulating fluidized bed boiler. The removal of sulfur dioxide in the medium, such as wet desulfurization, seawater desulfurization, etc., post-combustion desulfurization is to desulfurize the flue gas after combustion before it is discharged. [0003] As the largest developing country in the world, my countr...
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