92results about "Combustion regulation systems" patented technology

A method for lowering emissions that result from fuel combustion in a boiler may include obtaining, from a first sensor device, a plurality of fuel values of fuel parameters associated with a fuel injected into the boiler; obtain, from a second sensor device, a plurality of air values of air parameters associated with air injected into the boiler; identifying a fuel target flow rate and an air target flow rate based on the plurality of fuel values and the plurality of air values, wherein the fuel target flow rate and the air target flow rate result in a lower temperature in the boiler and in lowering the emissions from combustion in the boiler; controlling a fuel injection system to inject the fuel into the boiler at the fuel target flow rate; and controlling an air injection system to inject the air into the boiler at the air target flow rate.

The invention relates to the technical field of heat recovery, in particular to a steam waste heat and waste pressure power generation system of a high-pressure deaerator. Comprising a heat preservation box, a steam generator set, a boiler, a hot air output mechanism and a gas treatment mechanism. An air inlet pipe is connected between the heat preservation box and the output end of the high-pressure deaerator. The steam generator set comprises a generator body, a steam impeller shell and a steam impeller. The boiler is installed on the inner side of the heat preservation box, and a natural gas combustion device used for heating the boiler is installed on the heat preservation box. The hot air output mechanism is used for conveying hot air into the steam impeller shell; the gas treatment mechanism is connected to the tail end of the steam impeller shell and used for treating waste gas. The oxygen content and the water content in the steam impeller shell can be reduced, so that the interior of the steam impeller shell can be prevented from being quickly oxidized, and the service life of the steam generator set is prolonged.

The invention discloses a boiler blending combustion biomass fuel coupling chemical looping combustion system, and particularly relates to the technical field of fuel control, the system comprises an operation monitoring module, through deploying a multi-type sensor network at a key position, real-time collecting whole flow operation data, constructing a space-time monitoring data set covering the physical and chemical process of a combustion system, and determining a combustion state of the combustion system; the reliability of data acquisition is guaranteed through signal filtering and abnormal value correction; according to the method, a multi-dimensional cooperative control framework is constructed, the six-dimensional influence coefficients are fused into the comprehensive distribution index, the distribution strategy of the fuel between the main combustion area and the chemical looping reactor is dynamically optimized, traditional single control dimension is expanded to multi-dimensional cooperative control, and the adaptability of the system to complex fuel characteristics is improved.

The present invention provides a method for leveling the air and pulverized coal in a tangentially fired boiler with four-corner tangential burners. The present invention includes a four-drive leveling valve device and, based on the on-line measurement data of air and pulverized coal, the central controller adjusts the opening combinations of the four-drive leveling valves to level the air and pulverized coal velocities and concentrations in each air and pulverized coal pipeline, so as to ensure the balanced output of each layer of burners during the operation of the tangentially fired boiler with four-corner tangential burners, which is of great significance to the safety and economy of the boiler.

The invention discloses a biomass gas staged combustion system and a control method, the system comprises a staged combustor, a gas induced draft fan and an air blower, the gas induced draft fan is connected with the staged combustor through a gas main pipeline, a first-stage gas branch pipeline and a second-stage gas branch pipeline, the first-stage gas branch pipeline and the second-stage gas branch pipeline are connected in parallel, and the air blower is connected with the staged combustor. A first-stage fuel gas electric control valve is mounted on the first-stage fuel gas branch pipeline, and a second-stage fuel gas electric control valve is mounted on the second-stage fuel gas branch pipeline; the air blower is connected with the grading combustor through an air main pipeline, a first-stage air branch pipeline and a second-stage air branch pipeline, the first-stage air branch pipeline and the second-stage air branch pipeline are connected in parallel, and a first-stage air electric control valve is installed on the first-stage air branch pipeline; and a second-stage air electric control valve is mounted on the second-stage air branch pipeline. According to the invention, high-efficiency combustion and low-nitrogen emission are realized in a relatively wide load range.

A method is proposed for detecting an irregular ignition process of a heater (1). The heater (1) comprises a burner (3) to which a flow rate of a combustion mixture comprising a fuel and combustion air is supplied. During commissioning of the heater (1), a target flow rate of combustion air is set, a predetermined mass flow of fuel gas is added to this flow rate, and the resulting combustion mixture is ignited at the burner (3). During commissioning, the supplied flow rate of combustion air is recorded, and a diagnostic parameter is determined using the recorded flow rate of combustion air. This diagnostic parameter is used to detect a flashback if the diagnostic parameter deviates from a first value (19) corresponding to the target flow rate following an ignition pulse and has not reached the first value (19) again after a predetermined period of time (15).In addition, a heating device (1) and a computer program product (22) are proposed.

This fuel calculation device comprises: a remaining fuel amount calculation unit that periodically calculates and stores an approximate value of the remaining fuel amount on the basis of the measurement value of the remaining fuel amount remaining in a fuel container, and the fuel flow rate of fuel supplied from the fuel container; a failure determination unit that determines whether a remaining fuel amount meter that outputs the measurement value of the remaining fuel amount has failed; and a display control unit that controls so as to display the measurement value of the remaining fuel amount when the remaining fuel amount meter has not failed, and to display the approximate value of the remaining fuel amount when the remaining fuel amount meter has failed.

The invention discloses a flow and pressure detection system of a biomass boiler. The flow and pressure detection system comprises a fuel information acquisition module, a combustion data monitoring module, a dynamic analysis module, a model construction module and a central control regulation module, the fuel information acquisition module is used for acquiring static biomass fuel information and dynamic biomass fuel information; the combustion data monitoring module is used for monitoring the combustion reaction of biomass fuel in the boiler; the dynamic analysis module is used for analyzing the biomass fuel information and generating biomass fuel frequency conversion data information; the model construction module is used for constructing a biomass boiler flow-pressure parameter linkage model; and the central control adjusting module is used for carrying out real-time detection and dynamic adjustment on flow parameters and pressure parameters of the biomass boiler. By detecting and monitoring the flow and pressure of the biomass boiler, the combustion performance and stability of the biomass boiler are improved, and the use cost is saved.

Methods, apparatus, systems, and articles of manufacture are disclosed to measure gaseous emissions of a flare burner. An example apparatus includes a data collector to obtain emission data corresponding to an emission gas generated by a flare burner, a parameter calculator to calculate a concentration of the emission gas relative to a reference gas, calculate a flow rate of the emission gas based on the reference gas, and determine whether the flow rate satisfies a threshold. The example apparatus further includes a burner configurator to adjust at least one of a configuration or an operational parameter of the flare burner when the flow rate does not satisfy the threshold, and operate the flare burner with at least one of the adjusted configuration or the operational parameter.

A system and method for optimizing combustion in boiler. The optimization of the combustion in the boiler involves obtaining various data relating to the flow of fuel and air to burners of the boiler and the flame in the burner zone of the boiler that is generated from the introduction of the fuel and air into the burner zone. The data is used to determine air flows to the burners. The data and air flows are used to balance air and fuel at individual burners by manipulating air to match the fuel flow. The balancing of air and fuel at individual burners by manipulating air to match the fuel flow uses a guided search optimization algorithm that mixes stoichiometry determinations with a custom search algorithm that accounts for measurement inaccuracies and unexpected interactions between burners.

The invention provides a torch flame stability detection method, which comprises the following steps of: determining a relation function between a hydrogen ammonia doping ratio and flame length, color and temperature according to a flame stability parameter data set, training a flame stability prediction model through a support vector machine algorithm, and judging flame stability states under different ammonia doping ratios; performing kinetic analysis according to an output result of the flame stability prediction model, simulating a combustion process of hydrogen and ammonia gas, obtaining a change curve of the concentration of a key intermediate product along with time, and judging propagation characteristics of a reaction chain under different ammonia doping proportions; the method comprises the steps of simulating flow field distribution under different burner structures according to occurrence conditions of flame stability key points, obtaining a fuel injection velocity field, measuring a temperature field and a species concentration field of a combustion area, and judging the influence of the burner structures on flame stability.

A regulation method of a premixed gas burner substantially and / or essentially fed by hydrogen H2 as well as a device to carry out such method is described.

The invention relates to a method for operating a gas heater, in particular a gas heater for providing central heating and / or for providing domestic hot water, in particular a gas boiler, in particular a condensing boiler, wherein the method comprises the following steps: supplying a gas and a fuel gas into a mixing chamber of the gas heater and supplying a mixed gas from the mixing chamber to a burner of the gas heater, measure the differential pressure per unit time and / or provide a sensor signal to the control unit for determining a gas quantity, defined by a volume per unit time or a mass per unit time, before the gas is supplied to the mixing chamber, measure the differential pressure per unit time and / or provide a sensor signal to the control unit for determining a fuel gas quantity, defined by a volume per unit time or a mass per unit time, before the fuel gas is supplied to the mixing chamber and determining whether at least one operation condition of the gas heater is fulfilled based on the determined gas quantity and / or the determined fuel gas quantity

Determination of the power output by a fuel parameter. A method for regulating a burner installation, the burner installation comprising: a combustion chamber; an air supply duct which opens into the combustion chamber and comprises an air actuator in order to adjust the value of the air supply through the air supply duct; and a fuel supply duct which opens into the combustion chamber and comprises a fuel actuator in order to adjust the value of the fuel supply through the fuel supply duct, the method comprising the steps of: measuring and / or predetermining the value of the air supply through the air supply duct; measuring and / or predetermining the value of the air ratio λ; providing a fuel parameter h ; calculating the actual value of the power output of the burner installation from the value of the air supply, the value of the air ratio λ, the fuel parameter h P ist ; adjusting the burner installation in accordance with the actual value of the power output P ist and the target value of the power output P soll by means of an actuator selected from the fuel actuator and one air actuator.​

Combustion device with mass flow sensor. Combustion device comprising a burner (1), a side channel (24), and a feed channel (11); wherein the side channel (24) includes an inlet, an outlet, and a mass flow sensor (13) located between the inlet and the outlet of the side channel (24); wherein the mass flow sensor (13) is configured to detect a signal corresponding to a flow rate (15) of a fluid through the side channel (24); wherein the mass flow sensor (13) is flush with the inner wall of the side channel (24) or projects into the side channel (24); wherein the side channel (24) comprises a first section and a second section; wherein the first section of the side channel (24) is different from the second section of the side channel (24); wherein the first section of the side channel (24) includes the mass flow sensor (13); and wherein the first section of the side channel (24) projects into the feed channel (11).and wherein the first section of the side channel (24) projects into the supply channel (11) such that the mass flow sensor (13) is arranged within the supply channel (11).

The present invention describes a device for delivering a combustible gaseous mixture (M) comprising a first duct for feeding air (A) and a second duct for feeding a gaseous fuel (G), which join in a mixing zone, in which the gaseous fuel (G) and air (A) mix according to a lambda coefficient (λ) before being sent to a burner, a ventilation device for feeding the air (A) and at the same time suctioning gaseous fuel (G) along said ducts, and means for regulating the flow rate of gaseous fuel (G). The invention also concerns a method to use a device for controlling the delivering of a combustible gaseous mixture (M).

Processes for managing combustion of a fuel gas in the presence of an oxidant supplied to a combustion zone, where the fuel gas undergoes an event that includes a pressure decrease and / or an average molecular weight increase, and where the fuel gas is supplied to the combustion zone via a valve. The process can include (I) detecting the event. Upon detecting the event in step (I), the process can also include (II-a) controlling the fuel gas supplied to the combustion zone by limiting an output of the valve to no more than a predetermined threshold output to prevent excessive fuel gas flooding the combustion zone and / or (II-b) controlling the fuel gas supplied to the combustion zone by adjusting the valve to maintain a pressure of the fuel gas after the valve to no higher than a predetermined threshold pressure to prevent excessive fuel gas flooding the combustion zone.

According to the heat accumulating type kiln constant-temperature combustion control system and method, combustion-supporting air temperature, combustion-supporting air flow and gas flow are collected in real time, combustion input energy in a kiln is dynamically calculated on the basis of a preset combustion input energy model, and then the combustion-supporting air flow and the gas flow are adjusted; and combustion input energy entering the kiln is kept constant in each fire exchange period. Through the mode, the system not only adapts to the temperature change of the checker of the regenerative chamber in real time, but also solves the problem of insufficient or excessive energy caused by neglecting the air temperature change in the traditional technology by accurately calculating the energy input, and effectively reduces the problem of unstable temperature of molten glass caused by temperature fluctuation in the prior art; the temperature precision of the kiln and the stability of the glass melting quality are guaranteed, and the heat efficiency of the whole kiln system and the stability of the combustion process are improved.

The present application provides a method for detecting the stability of a torch flame, including: determining the relationship function between the hydrogen-ammonia mixing ratio and the flame length, color, and temperature according to the flame stability parameter dataset, training a flame stability prediction model through a support vector machine algorithm, and judging the stability state of the flame under different ammonia mixing ratios; performing kinetic analysis on the output results of the flame stability prediction model, simulating the combustion process of hydrogen and ammonia, obtaining the variation curve of the concentration of key intermediate products with time, and judging the propagation characteristics of the reaction chain under different ammonia mixing ratios; aiming at the occurrence conditions of the flame stability key points, simulating the flow field distribution under different burner structures, obtaining the fuel injection velocity field, measuring the temperature field and species concentration field in the combustion area, and judging the influence of the burner structure on the flame stability.

Various embodiments include a combustion apparatus. An example apparatus includes: a burner; a side duct; and a feed duct. The side duct comprises an inlet, an outlet, and a mass flow sensor between the inlet and the outlet of the side duct. The mass flow sensor is configured to detect a signal corresponding to an amount of flow of a fluid through the side duct. The side duct comprises a first portion and a second portion. The first portion of the side duct comprises the mass flow sensor. The first portion of the side duct is arranged within the feed duct.

The combustion system 100 includes a burner 12, a fuel conduit L1 connected to the burner 12 and supplying ammonia gas ga to the burner 12, a fuel valve V2 provided in the fuel conduit L1 and opening and closing the fuel conduit L1, a first gas conduit L3 fluidly connected to the fuel conduit L1 between the burner 12 and the fuel valve V2 and supplying a first gas g1 inert to the ammonia gas ga to the fuel conduit L1, and a second gas conduit L4 fluidly connected to the fuel conduit L1 between the burner 12 and the fuel valve V2 and supplying a second gas g2 inert to the first gas g1 to the fuel conduit L1.

A method for starting up a heating appliance (1) is proposed. The appliance is designed to burn a mixture of combustion air and fuel gas, which is supplied to a burner (3) by means of a conveying device (2). The method comprises at least the following steps: a) starting up the conveying device (2) and accelerating to a starting speed (21), b) recording a speed profile (18, 20) of the conveying device (2) during the execution of step a), c) comparing the speed profile (18, 20) recorded in step b) with a reference profile (19), evaluating the speed profile (18, 20) recorded in step b), and detecting a blocked condensate drain (12). The method enables the detection of a blocked condensate drain (12) during the start-up process of a heating appliance (1).In addition, a computer program, a control and regulating device (7), a heating device (1) and the use of a recorded speed profile (18, 20) are proposed.

The invention discloses an efficient fuel gas heating system. The heating system comprises a fuel gas / combustion-supporting gas ratio control system, an automatic ignition system, a combustion torch fixing support, a lifting moving platform, an annular combustion torch and a detection control system. The combustion torch, the combustion torch fixing support and the lifting moving platform are sequentially and fixedly connected from top to bottom. The lifting moving platform can move and lift; the fuel gas / combustion-supporting gas ratio control system is used for connecting a fuel gas source and a combustion-supporting gas source and adjusting the ratio of fuel gas to combustion-supporting gas to an optimal mixing ratio; the automatic ignition system is connected with the fuel gas / combustion-supporting gas ratio control system and the detection control system and used for achieving ignition of the combustion torch. And the detection control system is used for controlling the automatic ignition system and the fuel gas / combustion-supporting gas ratio control system. The heating system has the characteristics of sufficient combustion, high efficiency, high heat flux density, uniform heating, high temperature of the heating end and adjustable height position of the combustion torch.

The invention relates to a method for evaluating a quasi-stationary pressure difference detectable by a sensor at a gas boiler, wherein the sensor is a differential pressure sensor or a mass flow sensor, wherein the gas boiler has a mixing device (4) for mixing fuel flowing from a fuel inlet (G) and air flowing from an air inlet (L) to form a fuel-air mixture, a blower (5) for drawing the fuel and air through the mixing device (4), a main flow restrictor (3) for limiting a mass flow of fuel into the mixing device (4), a control valve (2) arranged upstream of the main flow restrictor (3) for controlling a mass flow of fuel into the mixing device (4), and a safety valve (1) arranged upstream of the control valve (2) for interrupting the mass flow of fuel.wherein the sensor detects a differential pressure between a pressure (p2) at a measuring point upstream of the main flow throttle (3) and downstream of the control valve (2) and a reference pressure (p0, p1) at a reference measuring point and transmits it to an evaluation electronics unit, wherein the evaluation electronics unit compares the differential pressure during a pre-rinse phase in which the safety valve (1) is closed with the differential pressure after the pre-rinse phase and detects a fault by the comparison.

Method and kiln (1) for the firing of base ceramic articles (BC) comprising: a firing chamber (7) inside which the base ceramic articles (BC) to be fired are conveyed; at least one burner (4) for burning a combustion mixture to heat the firing chamber (7) and to fire the base ceramic articles (BC); first and second feeding device (12, 13) for feeding, respectively, a fuel mixture and an oxidizer to the burner (4); an identification unit (21) configured to assess the type of fuel mixture and a control assembly (22) which is configured to activate the feeding device (12) and / or the second feeding device (13) depending on the temperature detected in the firing chamber (7), and to adjust the activation of the second feeding device (13) depending on the type of fuel mixture and on the flow rate of the fuel mixture and on the flow rate of the oxidizer.

The electronic control device of the present application is provided with: a flow rate calculation section that calculates the flow rate of intake air from an output signal of a flow rate measuring device attached to an intake pipe; a flow rate correction value calculation section that calculates an average value, a maximum value, a minimum value, and an amplitude of a signal of one or more frequencies included in the output signal of the flow rate measuring device and above a fundamental frequency of the output signal of the flow rate measuring device, for a prescribed period, of the flow rate of intake air calculated by the flow rate calculation section, and calculates a correction value for the flow rate of intake air from the calculation results; and a flow rate correction section that corrects the flow rate of intake air according to the correction value.

A method is proposed for operating a heating device (1) which has at least one burner (3), to which a mixture of fuel gas and combustion air is supplied via a mixture channel (11) by means of a conveying device (2), and a gas valve (5) designed to control a fuel gas flow rate. In the method, when a drop in the combustion air flow rate with a gradient below a predetermined limit value is detected, the supplied fuel gas mass flow is reduced for a stabilization period. Furthermore, a computer program, a regulating and control device (7), and a heating device (1) are specified.

A method for starting a heating appliance (1) is proposed, comprising a conveying device (2) for conveying a combustion mixture of fuel gas and combustion air to a burner (3), an ignition device (12) for the combustion mixture, and a gas valve (5), wherein, prior to the commissioning of the conveying device (2), the gas valve (5) is briefly opened (32), thereby filling the gas valve (5) with fuel gas. The duration of the brief opening (32) of the gas valve (5) can be a maximum of half the regular safety period (35) for commissioning the heating appliance (1). This reduces the influence of time delays, caused by a longer period since the last interruption of burner operation, between the opening of the gas valve (5) and the commencement and stabilization of the fuel gas flow.

A data stream indicative of a first set of flare tip parameters is received. A second set of parameters is determined based on the first set of flare tip parameters. A control signal is sent to an actuable device based on the first set of parameters and the second set of parameters. The actuable device is configured to maintain at least one parameter of the first set of parameter and the second set of parameters within a specified range.

The invention discloses a combined heat and power generation main steam mother pipe system pressure control method, and relates to the technical field of combined heat and power generation. Main steam mother pipe pressure data, fuel flow data, flue gas component data and exhaust gas temperature data are collected, combustion efficiency dynamic calculation is carried out based on the collected data, and the combustion efficiency is output; the method comprises the following steps of: constructing a main steam main pipe pressure dynamic model, outputting a pressure change rate, generating a fuel adjustment strategy according to a pressure prediction result and combustion efficiency data, executing the fuel adjustment strategy and monitoring pressure change. According to the method, smoke components and fuel data are monitored in real time, the combustion sufficiency degree is calculated, and the fuel flow and the excess air coefficient are dynamically adjusted; the combustion efficiency is improved, and the fuel utilization is optimized. And meanwhile, the emission content is reduced, the environmental protection requirement is met, problems are found in time through a model prediction control strategy, the combined heat and power generation stability is enhanced, an early warning mechanism is used for guaranteeing that the fuel is planned to be added or replaced, the efficiency of the main steam main pipe is maximized, and efficient and environment-friendly operation is achieved.