Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for automatically controlling combustion process of circulating fluidized bed boiler

An automatic control system, a technology of circulating fluidized bed, which is applied in the directions of fluidized bed combustion equipment, combustion method, fuel burned in molten state, etc.

Inactive Publication Date: 2013-12-04
ZHEJIANG UNIV
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contents of the invention

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System and method for automatically controlling combustion process of circulating fluidized bed boiler
  • System and method for automatically controlling combustion process of circulating fluidized bed boiler
  • System and method for automatically controlling combustion process of circulating fluidized bed boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] refer to figure 1 , figure 2 , image 3 , an automatic control system for the combustion process of a circulating fluidized bed boiler, including an on-site intelligent instrument 2 connected to a circulating fluidized bed boiler 1, a data interface 3, a database 4, a control station 5 and a host computer 6, the on-site intelligent instrument 2 and the on-site Bus connection, data bus is connected with data interface 3, and data interface 3 is connected with database 4, control station 5 and upper computer 6, and described control station 6 comprises:

[0109] The signal acquisition module 7 is used to collect main steam pressure, main steam flow, main steam temperature, feed water temperature, primary air volume, secondary air volume, #1 coal feeder coal volume, The real-time signals of #2 coal feeder coal volume, limestone volume, flue gas oxygen content, and flue gas sulfur dioxide content are denoted as x 1 (t), x 2 (t),...,x 11 (t).

[0110] The combustion c...

Embodiment 2

[0158] refer to figure 1 , figure 2 , image 3 , a circulating fluidized bed boiler combustion process automatic control method, the prediction method includes the following steps:

[0159] 1) Collect main steam pressure, main steam flow, main steam temperature, feed water temperature, primary air volume, secondary air volume, #1 coal feeder coal volume, #2 coal feeder from the on-site intelligent instrument according to the set sampling time interval The real-time signals of coal amount, limestone amount, flue gas oxygen content, and flue gas sulfur dioxide content are respectively denoted as x 1 (t), x 2 (t),...,x 11 (t).

[0160] 2) According to the load change of the boiler, the air volume, coal volume and limestone volume are automatically adjusted to overcome the disturbance and maintain a stable steam quality, which is achieved through the following sub-steps:

[0161] 2.1) Maintain the main steam pressure and generate a boiler load command at time t, which is re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a system and method for automatically controlling a combustion process of a circulating fluidized bed boiler. The system comprises a field intelligent instrument, a database, a data interface, a control station and an upper computer which are connected with the circulating fluidized bed boiler, wherein the field intelligent instrument is connected with the control station, the database and the upper computer; the control station comprises a signal acquisition module used for acquiring a real-time signal of a boiler running parameter from the field intelligent instrument, a combustion control module used for automatically generating actuator instruction signals of wind quantity, coal quantity and limestone quantity according to the change of the boiler running conditions, an instruction output module used for transmitting the actuator instruction signals to a field actuator, and an operation display module. According to the system, the wind quantity, the coal quantity and the limestone quantity can be automatically adjusted in real time according to the change of the boiler running conditions, the disturbance is overcome, and stable steam quality is kept, so that the safety, the environmental conservation and the economy of the circulating fluidized bed boiler are effectively improved, and the labor intensity of operators is fully reduced.

Description

technical field [0001] The invention relates to the field of energy engineering, in particular to an automatic control system and method for the combustion process of a circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed boilers have the advantages of less pollutant emissions, wide fuel adaptability, and strong load regulation capabilities. In recent years, they have been more and more widely used in electric power, heating and other industries. The combustion system is a main system of the circulating fluidized bed boiler, and the control quality of the combustion system affects the safety and economy of the boiler operation. However, the combustion process of circulating fluidized bed boilers has the characteristics of multi-parameters, nonlinearity, large lag and multi-variable close coupling, which brings great difficulty to automatic control. At present, circulating fluidized bed boilers put into production in China generally have ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/28
Inventor 刘兴高吴家标
Owner ZHEJIANG UNIV