335 results about "Boiler control" patented technology

The invention discloses a fluidized bed boiler control and combustion optimization system. The problem that a fluidized bed boiler system is not easy to control for a long time is solved. According to a method, a control strategy of combining an advanced control algorithm and a conventional control algorithm is adopted, and continuous, economical and stable operating of the boiler system is guaranteed; multivariable model-free adaptive control is adopted, and decoupling control of the fuel quantity and the air supply quantity over the bed temperature under the variable load work condition is achieved; and a nerual network technique is adopted for building a boiler combustion prediction model, online calculation of the boiler efficiency and NOX and SOX emissions is achieved, a multi-objective optimization function is constructed according to the prediction result, a combustion self-optimization algorithm is adopted, the flue gas oxygen content and the bed temperature are optimized constantly so as to adapt to work condition changes, and a fluidized bed boiler can operate in an optimal combustion area.

A system and method is presented for a boiler controller for a boiler system. The boiler controller comprises a sensor monitoring component, operably coupled to a temperature detector operable to measure a temperature of a medium within the boiler, and a pressure detector operable to measure a pressure of the medium. The boiler controller also comprises a burner controller coupled to a burner. The burner controller is operable to control the burner to heat the boiler based upon at least one of the temperature of the medium measured by the temperature detector compared to a range of temperature setpoints, results of an energy efficiency calculation, a presence of the medium, and the pressure of the medium.

The invention discloses an intelligent boiler control system, which comprises a controller, a keyboard module, a detection module, a failure processing module and an alarm prompting module, wherein the output end of the controller is further connected with a liquid crystal display. On the basis of a singlechip technology, a temperature sensor, a pressure sensor and a water level sensor are fully used for monitoring the temperature, pressure and water level of a boiler; when the boiler is in an unsafe state according to detection, the failure processing module is started automatically; an electromagnetic valve is used for controlling water feeding, a relay is used for controlling a blower, and the risks of water depletion, overpressure and over-temperature of the boiler are prompted and alarmed through voice prompts, LED (Light-Emitting Diode) prompts and a loudspeaker, so that the running reliability and safety of the boiler are effectively improved, the service life of the boiler is prolonged, and explosive incidents are reduced; and moreover, the intelligent boiler control system is low in production cost, and contributes to popularizing.

Methods and systems are provided for controlling SCR performance in a boiler. The boiler includes one or more generally cross sectional areas. Each cross sectional area can be characterized by one or more profiles of one or more conditions affecting SCR performance and be associated with one or more adjustable desired profiles of the one or more conditions during the operation of the boiler. The performance of the boiler can be characterized by boiler performance parameters. A system in accordance with one or more embodiments of the invention can include a controller input for receiving a performance goal for the boiler corresponding to at least one of the boiler performance parameters and for receiving data values corresponding to boiler control variables and to the boiler performance parameters. The boiler control variables include one or more current profiles of the one or more conditions. The system also includes a system model that relates one or more profiles of the one or more conditions in the boiler to the boiler performance parameters. The system also includes an indirect controller that determines one or more desired profiles of the one or more conditions to satisfy the performance goal for the boiler. The indirect controller uses the system model, the received data values and the received performance goal to determine the one or more desired profiles of the one or more conditions. The system model also includes a controller output that outputs the one or more desired profiles of the one or more conditions.

The invention discloses a fossil power plant coordination control method based on multi-parameter prediction. Aiming at the characteristics that a boiler controlled object is lagged, slow in response process and the like, feedwater flow, coal supply quantity and steam turbine valve opening are estimated reasonably, deviation of main steam pressure and separator outlet temperature is predicted, and a main steam pressure control loop and a separator outlet temperature control loop are respectively formed, and are coordinated with a load control loop so as to form a fossil power plant coordination control system. Control quality of the fossil power plant coordination control system is effectively improved, main steam pressure fluctuation during load change is suppressed effectively while the load change is responded fast, deviation between main steam pressure and a setting value is reduced, the separator outlet temperature fluctuation is suppressed, and the situation that the separator outlet temperature is over high is reduced. Besides, the stability of a boiler control system and the operation efficiency of a unit are improved.

The invention discloses a power plant boiler combustion intelligent control method. The method comprises the following steps: (1) historical operation data are fused; (2) the historical operation data after fusion are traversed, error detection is carried out, error data are eliminated, steady-state operation condition data are screened, certain operation condition data in the steady-state operation condition data are removed, and the remaining steady-state operation condition data serve as training samples; (3) a training sample library is built, coal quality characteristic parameters and boiler control parameters serve as input parameters, combustion effect parameters serve as output parameters, and a boiler integrated combustion prediction model is built; and (4) global sensitivity analysis is carried out on the boiler combustion effect parameters, sensitive boiler control parameters in the boiler combustion effect parameters and a sensitive interval are obtained, a heuristic optimization algorithm is then adopted to realize optimization of the boiler control parameters, and thus, intelligent optimization control on the boiler is realized. Modeling is carried out based on the rich historical operation data of the power plant boiler, and the practicability is good.

An electric boiler control system, comprising: a series circuit, connected to a power supply source, said series circuit comprising: a heating element, dipped in a water of said boiler; a thermostat employing a first switch, adapted to open when a temperature of said water reaches a first level, and to close when said temperature falls under a second level, wherein said second level is less than said first level; a second switch, serially connected to said first switch; a mechanism for keeping said second switch closed while said series circuit is closed, and keeping said switch open, until closed by a user; a first button, for closing said second switch by a user; and a second button, for opening said second switch by a user.

The invention provides a thermal power plant boiler NOx emission control method under variable-load working conditions. The method comprises the steps of (1) establishing a boiler load prediction model and an NOx emission prediction model; (2) solving the optimum control quantity of a thermal power plant boiler according to prediction results of the boiler load prediction model and the NOx emission prediction model in order to meet the requirement for boiler load and achieve an optimized target of minimizing NOx emissions; and (3) issuing the optimum control quantity of the thermal power plant boiler to the thermal power plant boiler so as to control operation of the thermal power plant boiler. In order to meet the requirements for low NOx emissions of a thermal power plant and control operation parameters reasonably, the control parameters of the minimum NOx emissions can be obtained while the thermal power plant boiler load is guaranteed, so that the power generation efficiency is improved, NOx emissions are reduced, and the production requirements are met.

Boiler intelligent control system and its multi-kind coal controlling means belong to the computer management and control technical field, comprising data collection system, intelligent controller and warning system, industrial control computer,, data communication network, long-distance monitoring service, real-time Ethernet interface, data management system and different kinds of coal burning calculation and management system, especially real-time Ethernet interface and 'fixed furnace / movable furnace model have solved data transmission and multi- furnace teamwork problem; the multi-kind coal controlling means is, after entering the chosen kind of coal, the system will automatically choose its neuronic network or calculate the first wind rate, the second wind rate and fuel quantity with different load, build the initial neuronic network and learn online, realizing the boiler controlled automatically, changing and satisfying manufacturing parameter requirement also, adding long-distance monitoring service, increasing production management level.

The present invention relates to a control program, a controller, and a boiler system that are related to a boiler group including a plurality of boilers controlled in combustion at stepwise combustion positions. It is well suitable, in a control program for conducting control on a boiler system that includes a boiler group having a plurality of boilers which can be controlled in combustion quantity at stepwise combustion positions and in which at least one of the combustion positions is assumed to be a high-efficiency combustion position and that is configured to be controlled in combustion based on an increase/decrease in desired loads, that in the case of increasing a quantity of combustion in the boiler group, after a high-efficiency combustion shift signal that makes the shift to the high-efficiency combustion position is output to all of the boilers subject to high-efficiency control by which control is conducted on the basis of combustion at the high-efficiency combustion position, a control signal may be output that makes the shift to a higher combustion position than the high-efficiency combustion positions for any one of the high-efficiency control subject boilers.

A boiler control system for efficiently controlling the operation of a packaged boiler is provided. The system includes a combustion air control system, a fuel control system, a flue gas sensing system, and a boiler controller. The boiler controller is in operative communication with the combustion air control system, fuel control system, and the flue gas sensing system. Based upon a system demand, the boiler controller controls coarse-level operation of the combustion air control system and the fuel control system. The flue gas sensing system includes an oxygen sensor and a flue gas differential sensor that senses a change in a characteristic of the flue gas. When the flue gas differential sensor senses a change in the flue gas characteristic that meets a flue gas differential setpoint, the boiler controller controls fine-level operation of the combustion air control system to efficiently control the amount of oxygen in the flue gas.

The present invention relates to boiler controlling technology, and is especially the high pressure blast sweeping method for fast treating product returning device jamming accident in circular fluidized bed boiler. According to the design scheme the present invention provides, high pressure blast pipe is connected in the product returning device, and in case of abnormal temperature and pressure inside the product returning device, the control valve in high pressure blast pipe is opened and high pressure blast is utilized in blowing off the slag block deposited into the grid plate in the product returning device to restore the normal work state of the product returning devie. The high pressure blast pipe is connected to the grid plate and the high pressure blast sweeps upwards from the wind cowl on the grid plate. The present invention utilizes available high pressure medium in boilr for fast treating product returning device jamming via simple sweeping.

Disclosed are systems and methods of generating electrical power utilizing a mining bank of individual blockchain miners. The blockchain miners operate as a revenue generating heat source that provides thermal energy into a power plant's Rankine or Brayton cycle turbines.

A modular boiler system includes a boiler control, a first boiler in operative connection with the boiler control, and a temperature sensor in operative connection with the first boiler. The system also features at least one secondary boiler in operative connection with the master boiler. The boiler control is operatively connected to only the first boiler and it enables the first boiler to control a boiler parameter of the first boiler and the at least one secondary boiler.

The invention relates to a coordinated control type peak and frequency regulation system and equipment of a thermal power generating unit, and a method thereof. The system comprises a unit coordination control module 4 and an electric boiler 9. The unit coordination control module 4 includes a boiler coordination control module, a steam turbine coordination control module and an electric boiler control module. The coordinated control type peak regulation and frequency modulation equipment comprises a hardware part and a software part. The unit coordinated control module 4 is integrated in a thermal power unit central control room control cabinet and is in communication connection with various operating parameter sensors and controllers of an original CCS and AGC control systems, a boiler,a steam turbine, a generator and an electric boiler. Therefore, the flexible peak and frequency modulation of the thermal power generating unit can be realized by using a coordinated control method.

The invention discloses a monitoring and alarming system for a temperature rise of an oven of a heating furnace. A temperature rise curve module is used for carrying out configuration on a temperature rise curve of an oven by alarm rule configuration software to form an alarm rule base, and an alarm rule table module stores parameter setting; a device real-time database module stores real-time data of needed monitoring parameters collection of a boiler control system or enterprise database into parameter historical data tables in a time sequence; the real-time parameter obtained by refreshing are provided for a real-time alarming unit; and then on the basis of connection of an operation trend module of a client and a real-time data acquisition unit, a current temperature rise curve operation state of the oven is checked, and whether alarming needs to be carried out is selected according to parameters in the historical table based on connection of an alarm implementation module of the client and the real-time alarming unit. According to the invention, the system collects the operation data and carries out real-time reasoning; and when a temperature offset occurs, alarming prompting is carried out.

The invention relates to a startup boiler control system. The startup boiler control system comprises a power supply system. The power supply system comprises a first startup boiler MCC, a second startup boiler MCC and a DCS common power supply cabinet. The first startup boiler MCC supplies power to an on-site actuator which a first startup boiler belongs to and a first combustor power supply cabinet respectively. The second startup boiler MCC supplies power to an on-site actuator which a second startup boiler belongs to and a second combustor power supply cabinet respectively. The DCS common power supply cabinet supplies power to a first DCS remote I/O cabinet and a second DCS remote I/O cabinet respectively. The first combustor power supply cabinet supplies power to an actuator which a first combustor belongs to. The second combustor power supply cabinet supplies power to an actuator which a second combustor belongs to. Through the startup boiler control system, a circuit can be simplified, and reliability can be improved.

The invention discloses a boiler combustion control system, method and device. The control system comprises a combustion treatment device and a control device; the combustion treatment device is used for conducting correction treatment on a boiler control command generated in advance according to obtained currently run digital parameters of a boiler, and a corrected correction control command is obtained; the control device is connected with the combustion treatment device and used for receiving the correction control command and sends the correction control command to an actuator of the boiler, wherein the actuator is used for carrying out the correction control command. According to the boiler combustion control system, method and device, the technical problem that the running performance of an existing boiler which acts based on a DCS is poor is solved.