摘要:
The present invention generally relates to the field of combustion technology related to gas turbines. More in particular, the present invention refers to a method for operating a combustion device. Advantageously, a pulsation protective load shedding is avoided by adjusting the parameter ω in case of too high combustion pulsation levels from the standard operation set point. This implies that the dynamic pulsation control logic is activated in case the high frequency pulsation level exceeds a predetermined threshold value and a control unit adjusts the ω, preferably in a stepwise manner, until acceptable and optimum pulsation levels are reached or a maximum reduction of the ω is performed.
摘要:
A flame-holding control method in a gas turbine having a combustor can and a fuel nozzle disposed in the combustor can. The method can include performing a first scheduled injection of a diluent stream into the nozzle, checking to see if a time period has exceeded a time threshold and in response to the time period being greater than that the time threshold, performing a second scheduled injection of the diluent stream into the nozzle.
摘要:
A method for operating an incinerator wherein fuel is provided into the incinerator separate from combustible waste and upon an increase in oxygen demand, initially refraining from proportionately increasing the oxygen provided into the incinerator and responding by decreasing the flow of fuel so as to control the generation of PICs without substantially raising the incinerator temperature. The oxygen flow is increased when the fuel flowrate has been reduced to a predetermined minimum should this occur.
摘要:
A method for measuring and controlling flame quality in real-time, the method comprising the steps of: acquiring a plurality of flame images in a first field of view; acquiring a plurality of flame images in a second field of view; processing the acquired plurality of flame images of said first and second fields of view to determine an overall flame quality parameter; and comparing the overall flame quality parameter to a tolerance range. In other aspects, a system for measuring and controlling flame quality in real-time and a non-transitory computer readable medium (CRM) storing instructions configured to cause a computing system to measure and control flame quality in real-time are provided.
摘要:
A method of operating a burner, in particular, a burner of a gas turbine, and a burner configuration include supplying an adjustable burner with fuel through a supply line. The fuel quantity is set by an opening of a control element as a function of a selected output of the burner. A calorific value of the fuel is determined, and the degree of opening is calculated and directly set using the output and the calorific value, resulting in a variable output control that is operationally reliable with respect to perturbations. A controller is connected to the control element having a selectable opening for setting the fuel quantity. In the controller, the degree of opening can be determined as a function of the output, the type of the fuel, and a pressure loss in the fuel supply line, and a corresponding signal can be transmitted to the control element such that the degree of opening is set.
摘要:
The operation of a combustible atmosphere furnace is controlled by monitoring the temperature of the combustible atmosphere, and the rate-of-change thereof. The measured rate-of-change is compared to a previously determined safe rate-of-change so as to anticipate and discourage incipient internal ignition.
摘要:
This disclosure relates to systems and methods of predicting physical parameters for a combustion fuel system. In one embodiment of the disclosure, a method of predicting physical parameters of a combustion fuel system includes causing water injection in at least one combustor. The water injection is associated with at least one time and performed during gaseous fuel operations or after liquid fuel operations. The method includes measuring exhaust spread data associated with the water injection and allows correlating the exhaust spread data to at least one physical parameter associated with a nozzle or a valve of the fuel system. The method further includes storing the exhaust spread data, the at least one physical parameter, and the at least one time to a database. The method further provides stored historical data from the database to an analytical model. The analytical model is operable to predict, based at least partially on the stored historical data, at least one future physical parameter associated with a future time.
摘要:
A flame-holding control method in a gas turbine having a combustor can and a fuel nozzle disposed in the combustor can. The method can include performing a first scheduled injection of a diluent stream into the nozzle, checking to see if a time period has exceeded a time threshold and in response to the time period being greater than that the time threshold, performing a second scheduled injection of the diluent stream into the nozzle.
摘要:
A batch-type pyrolysis furnace fired by a main heat source such as a gas burner or an electric heating coil in combination with an afterburner to burn volatiles generated in the furnace's main chamber, is operated to incinerate high-polymer loads smokelessy, yet is effectively safeguarded from explosions. A single thermocouple (throat TC) senses the instantaneous temperature in the throat of the furnace and in cooperation with a programmable controller, maintains a preselected ramp and soak temperature profile over the entire burn cycle. When the temperature required by the profile is exceeded, a single water spray actuated by a signal from the PC lowers the temperature below the profile. The throat TC thus maintains a fire under controlled temperature conditions in the main chamber without an explosion, using a single-stage system. This single-stage control system, for additional safety and redundancy, may include two back-up thermocouples, one in the main chamber (main chamber TC), and, a second (stack TC) in the exhaust stack downstream of the afterburner. The main chamber TC senses the ambient, essentially instantaneous temperature at that location, and actuates the water spray system. The main chamber TC and the stack TC may each also attenuate the output of the main burner and control its on/off operation.
摘要:
A method of automatic combustion control in a combustion system comprising a combustion chamber, combustion means for causing the combustion of fuel in the chamber, a heat exchanger connecting with the combustion chamber, an exhaust passage connected with the heat exchanger, and fuel supply means for supplying fuel to the combustion means, such method comprising measuring the combustion temperature in the combustion chamber and producing a first quantity corresponding in magnitude with the combustion temperature, measuring the exhaust temperature in the exhaust passage and producing a second quantity corresponding in magnitude with the exhaust temperature, producing a summation of the first and second quantities and thereby producing a summation quantity, and varying the supply of air to the combustion means in such manner as to maximize the summation quantity, whereby the combustion efficiency is also maximized.A minor amount of water is mixed with the air in the form of very small water droplets, 100 microns or less in size, to increase the combustion efficiency while controlling the buildup of combustion byproduct contaminants on the internal components of the combustion system.