摘要:
A method for controlling furnace temperature of a fired heating furnace is disclosed, comprising: measuring furnace temperatures to obtain furnace temperature feedback values; calculating the differences between furnace temperature setting values and the furnace temperature feedback values as discrepancy values DV 1 , in accordance with the furnace temperature feedback values and the furnace temperature setting value; calculating the differences between the furnace temperature setting values and the furnace temperature feedback values in a unit time, i.e., the gradient of furnace temperature change values, as discrepancy values DV 2 ; obtaining a speed V of a fired heater machine set from a speed adjuster of the fired heater machine set, and obtaining a first multiple feed forward output components FF V in accordance with the speed V of the machine set (V); obtaining a second multiple feed forward output components FF T in accordance with the differences between the furnace temperature setting values and the furnace temperature feedback values, i.e., the discrepancy values DV 1 ; looking up a PID control parameter in accordance with the discrepancy values DV 1 and DV 2 , based on fuzzy control rule, and creating an adjusting control parameter OP 1 in accordance with the PID control parameter; controlling a valve for regulating coal gas flow and a valve for regulating air flow by combining the adjusting control parameter OP 1 with the first multiple feed forward components FF V and the second multiple feed forward components FF T as a final control output value.
摘要:
A gas heater is provided with a combustion status sensor that provides heater performance data to a controller that controls the heater according to the sensor data and stored calibration parameters optimised for the particular heater.
摘要:
L'invention concerne un procédé de combustion d'un combustible avec un comburant riche en oxygène dans une chambre de combustion (3), dans lequel, de façon cyclique, on mesure au moins une variable principale représentative de la combustion dans ladite chambre de combustion (3), et, en fonction du résultat de mesure de ladite au moins une variable principale, on détermine un ordre de commande de régulation des débits de combustible et de comburant à injecter dans ladite chambre de combustion (3). Puis, on applique ledit ordre de commande de régulation pour faire brûler le combustible avec le comburant dans ladite chambre (3). En outre, on mesure au moins une variable secondaire associée à une contrainte de fonctionnement de ladite chambre de combustion (3) ou à une perturbation dans le fonctionnement de celle-ci, et, pour la détermination dudit ordre de commande de régulation, on prend également en compte le résultat de mesure de ladite au moins une variable secondaire. Application notamment à des fours à verre, des fours rotatifs, des fours d'incinération.
摘要:
A combustion control method for waste incinerators, developed for the purpose of reducing the concentrations of CO and NOx in a waste gas and a generation rate of dioxine. The condition of the waste on a post-combustion fire grate (3c) is judged on the basis of measurement values on a main flue thermometer (14), an O 2 analyser (16), a CO concentration meter (17) and a barometer (18a) which is set under the post-combustion fire grate. Thus, the possibility that the apparatus will get into an insufficient temperature condition, or an air or fuel shortage condition is judged quickly, and the flow rate of the air to the post-combustion fire grate (3c), or the flow rate of the air to the same fire grate (3c) and the moving speed of the fire grate are controlled.
摘要:
In a dried sludge melting furnace apparatus, at least one of following two controls is executed. In one of the controls, the primary combustion chamber (PCC) upper combustion air supply amount and the PCC lower combustion air supply amount are adjusted so as to respectively become a target PCC upper combustion air supply amount and a target PCC lower combustion air supply amount which are obtained from an inferred PCC upper combustion air supply amount and an inferred PCC lower combustion air supply amount. The inferred PCC upper and lower combustion air supply amounts are obtained by a fuzzy inference device (221). In the other control, the total combustion air supply amount and the second combustion chamber (SCC) burner fuel supply amount are adjusted so as to respectively become a target combustion air supply amount and a target SCC burner fuel supply amount which are obtained from an inferred combustion air supply amount and an inferred SCC burner fuel supply amount. The inferred combustion air supply amount and the inferred SCC burner fuel supply amount are obtained by a fuzzy inference device (222).
摘要:
This invention relates to an in-ash unburned component estimating device for a coal-fired furnace which monitors the density of in-ash unburned component contained in burning waste gases to operate the furnace efficiently. The object of the invention is to infer and estimate from the current situation by a simple means the density of in-ash unburned component in the burning exhaust gases that affects the combustion efficiency. A furnace temperature, a load band in the furnace, a furnace contamination coefficient, a ratio of two-stage combustion air supplied to the furnace, and a coal mixture ratio are taken in as fuzzy quantities to infer fuel ratio data and correction data used to correct predetermined reference values of reference in-furnace temperature distribution, reference in-furnace air ratio distribution and reference powdered coal grain diameter distribution. The reference values corrected by the correction data and coal reaction rate data determined from the fuel ratio data are used to calculate the density of in-ash unburned components in the burning waste gases.
摘要:
The invention relates to a method for regulating a thermodynamic process in particular a combustion process, in which the state (St) of the system is measured and compared with optimisation targets (rj) and adjustment actions (ai) are carried out in the system for the purposes of regulation, whereby a process model (PM), independent of the optimisation targets (ri), is determined, describing the effects of actions (a¿t?) on the state (St) of the system. A situation assessment (SB), independent of the process model (PM), is carried out by means of quality functions (ut) and the state (st) of the system with regard to the optimisation targets (r?j¿).
摘要:
A regulating device for regulating the course of a gas turbine plant (1) has at least one sensor (21, 23, 25, 27, 35, 37) for sensing a measurement variable and for outputting a measurement signal which represents the measurement variable; at least one adjusting system (31, 32) for influencing air and/or fuel supply to a combustion chamber (12) of the gas turbine plant on the basis of a correcting variable; and a regulator (29) connected to the at least one sensor (21, 23, 25, 27, 35, 37) so as to receive the measurement variable and to the at least one adjusting system (31, 32) for outputting the correcting variable, the regulator (29) being designed to determine the correcting variable on the basis of the measurement variable received and its deviation from a pilot variable. At least one sensor (21, 23, 25, 27, 35, 37) is designed to sense the variation in time of at least one burner or combustion chamber parameter as measurement variable.
摘要:
A device for combustion control, especially for gas-fed boiler burners, comprises at least an optical sensor (10) constituted of one or more photodetectors, oriented in the direction of one or more defined zones of flame (12) of a boiler (14), whose electric signals supplied at the outlet are acquired by a card for a data elaboration system (16) based on neural networks and fuzzy logic, said system interacting with the electronic card (18) for the control of said boiler (14).