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Steam temperature control using dynamic matrix control

A dynamic matrix and steam temperature technology, applied in the control system, steam superheating, steam generation, etc., can solve the problems of large temperature deviation, shortening the life of other parts of the pipeline, etc.

Active Publication Date: 2015-03-18
EMERSON PROCESS MANAGEMENT POWER & WATER SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Needless to say, this control response in relation to changing boiler operating conditions can lead to large temperature excursions which cause stress on the boiler system and shorten the life of piping, spray control valves and other components of the system

Method used

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  • Steam temperature control using dynamic matrix control
  • Steam temperature control using dynamic matrix control
  • Steam temperature control using dynamic matrix control

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Embodiment Construction

[0018] While a detailed description of many different embodiments of the invention is presented below, it should be understood that the legal scope of protection of the invention is defined by the words of the claims that issue at the end of this patent application. The detailed description is to be construed by way of example only and does not describe every possible implementation of the invention since describing every possible implementation would be impractical, if not impossible. Numerous alternative embodiments could be implemented, using either current technology or technology invented after the filing of this patent, which would still fall within the scope of the claims defining the invention.

[0019] figure 1 A block diagram is shown for a once-through boiler steam cycle for a typical boiler 100 that may be used eg in a thermal power plant. The boiler 100 may include various parts through which various forms of steam or water flow, such as superheated steam, reheat...

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Abstract

A technique of controlling a steam generating boiler system includes using a rate of change of disturbance variables to control operation of a portion of the boiler system, and in particular, to control a temperature of output steam to a turbine. The technique uses a primary dynamic matrix control (DMC) block to control a field device that, at least in part, affects the output steam temperature. The primary DMC block uses the rate of change of a disturbance variable, a current output steam temperature, and an output steam temperature setpoint as inputs to generate a control signal. A derivative DMC block may be included to provide a boost signal based on the rate of change of the disturbance variable and / or other desired weighting. The boost signal is combined the control output of the primary DMC block to more quickly control the output steam temperature towards its desired level.

Description

technical field [0001] This patent relates generally to the control of boiler systems and, more specifically, to the use of dynamic matrix control to control and optimize boiler systems that produce steam. Background technique [0002] Various industrial and non-industrial applications use fuel fired boilers, which typically operate by burning one of various fuels, such as coal, natural gas, oil, waste, etc., to convert chemical energy into thermal energy. An exemplary use of a fuel fired boiler is in a thermal power plant where the fuel fired boiler produces steam from water passing through a number of tubes and passages within the boiler, and the steam produced is then used to run one or more steam turbines to generate electricity. The output of a thermal power plant is a function of the amount of heat produced in the boiler, where the amount of heat is directly determined eg by the amount of fuel consumed (eg burnt) per hour. [0003] In many cases, power generation sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/00
CPCF22G5/12
Inventor R·A·贝维里吉R·J·小沃伦
Owner EMERSON PROCESS MANAGEMENT POWER & WATER SOLUTIONS