A control system for a fuel-burning appliance such as a wood or pellet burning stove may include a particulate matter sensor. The control system may also include an ignition system to ignite an ignition charge of ignitable fuel. A processor controls the operation of the functional components of the appliance to maintain operating conditions within pre-determined parameters.

A boiler apparatus for waste incineration includes a combustion chamber having a waste inlet formed on one side and combustion spaces for incinerating the introduced waste. Air injection pipes are vertically spaced apart from one another from a lower part of the combustion chamber, extend along the circumference thereof, and have injection holes to inject air toward the center of the combustion spaces. An air supply unit supplies air to each of the air injecting pipes separately, in response to a control signal. Temperature sensors are mounted in the combustion spaces in respective stages vertically divided on the basis of the air injecting pipes, to measure a combustion temperature of the combustion space within the combustion chamber. A control module controls operation of the air supply unit, to control an injection amount of air fed to the combustion space according to a combustion temperature measured by each temperature sensor.

The embodiments of the present application disclose a combustion control system of a gas water heater or wall-hanging boiler, and a control method thereof. The system comprises: a flue gas channel consisted of a combustor, a heat exchanger and a stepless speed regulating fan and a smoke tube, which are connected sequentially; a control unit connected to a signal input end of the stepless speed regulating fan; a wind pressure sensor assembly that detects a pressure signal upstream of an impeller of the stepless speed regulating fan, a signal output end of the wind pressure sensor assembly being connected to the control unit; the control unit comprising a storage for storing a correspondence relationship between the pressure signal upstream of the stepless speed regulating fan and a thermal load of the combustor, and a controller that controls operation of the stepless speed regulating fan according to the correspondence relationship. The present application further regulates the rotational speed of the stepless speed regulating fan by detecting the pressure signal upstream of the impeller of the stepless speed regulating fan, thereby achieving a better wind-resistant performance of the present application.

A pressure probe assembly for attachment to a venturi of a gas-fired appliance, where the venturi includes a body having an inlet end, an outlet end, and a wall defining a mixing chamber extending from the inlet end to the outlet end about an axis. A support member is detachably coupled to the mixing chamber. A first pressure probe is coupled to the support member and has a first pressure tap disposed substantially adjacent the axis. A second pressure probe is coupled to the support member and has a second pressure tap disposed substantially adjacent the mixing chamber wall. Also disclosed is a gas-fired appliance, such as a water heater, including the pressure probe assembly.

Techniques for controlling a solid fuel combustion appliance, e.g., a wood burning stove, are disclosed. A control system measures an exhaust gas temperature of airflow through an outlet of the solid fuel combustion appliance. The control system determines a derivative of the exhaust gas temperature with respect to time. The derivative of the exhaust gas temperature with respect to time is compared to a predetermined threshold. The control system modulates the inlet damper in response to determining that the derivative of the exhaust gas temperature with respect to time reaches the predetermined threshold.

This disclosure relates generally to a method and system for real time monitoring and forecasting of fouling of an air preheater (APH) in a thermal power plant. The system is deploying a digital replica or digital twin that works in tandem with the real APH of the thermal power plant. The system receives real-time data from one or more sources and provides real-time soft sensing of intrinsic parameters as well as that of health, fouling related parameters of APH. The system is also configured to diagnose the current class of fouling regime and the reasons behind a specific class of fouling regime of the APH. The system is also configured to be used as advisory system that alerts and recommends corrective actions in terms of either APH parameters or parameters controlled through other equipment such as selective catalytic reduction or boiler or changes in operation or design.

Exhaust sensors for use with residential solid fuel-burning appliances are disclosed. In one example, a sensor apparatus includes an optical sensor, a lens, and first and second light sources positioned adjacent to the optical sensor. The first light source is configured to emit a first light signal towards a target area of an exhaust gas stream. The second light source is configured to emit a second light signal towards the target area. The optical sensor is configured to detect a light signal comprising at least one of a reflected portion of the first and second light signals and a diffracted portion of the first and second light signals. The sensor apparatus also includes a processor configured to determine a concentration of smoke particles in the exhaust gas stream based on the detected light signal.

A control system for adjusting total air flow or oxygen in flue gas for a fossil fired power generating or steam generating unit, that includes a plurality of sensors that supply data to a tunable controller adapted to sense total air flow and/or oxygen flow; with the sensors also supplying data relating to carbon monoxide (CO) and/or combustibles and/or loss of ignition (LOI) and/or carbon in ash (CIA), and where the tunable controller can set a desired target or target range for at least one of CO, combustibles, CIA, or LOI and adjust the total air flow and/or O2 via direct control or bias signals. The system can respond to discrete events, analog events and/or thresholds.

The dry oxygen content in the exhaust of an industrial furnace may be controlled to 1% or less by determining one or more of: the temperature of: each or a group of one or more burner (flame); one or more section of the radiant walls adjacent (e.g., within 5 feet of the burner); the temperature gradient across the process coils; the combustion products of one or more burners; the mass flow rate or the volume flow rate of air to each burner (e.g., the pressure drop across the variable forced air aperture ii) comparing the result to said target value; and iii) adjusting either a) the opening of the variable forced air aperture; or b) adjusting the mass flow rate or the volume flow rate of air from said one or more fans.

A purge time of a combustion space is optimized in a multi-burner system having a combustion chamber in which the combustion space is physically separated from a heating space by providing a combustion controlling device. The combustion controlling device controls an operation of multiple burners having combustion spaces different from each other, a first prepurge time and a second prepurge time set as execution times of a single purge, the single purge based on the first prepurge time is performed on a combustion space of a corresponding burner after overall purge when an ignition of the burner is instructed in a state where none of the burners is ignited, and the single purge based on the second prepurge time is performed on the combustion space of the corresponding burner when the ignition of the burner is instructed in a normal operating state.