Control system and control method for material bed of circulating fluidized bed boiler

A circulating fluidized bed and material layer control technology, which is applied in the boiler automatic control system and the control field of circulating fluidized bed boilers, to achieve the effect of solving the instability of the material layer, improving the efficiency of waste heat utilization, and improving the efficiency of waste heat recovery

Active Publication Date: 2013-02-27
德阳劲达节能科技有限责任公司
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in searching for the method of controlling the material layer of circulating fluidized bed boilers, there is no report on the application of PLC

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
  • Control system and control method for material bed of circulating fluidized bed boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Design a factory circulating fluidized bed boiler 1x75t / h, adopt the automatic control method of the material layer of the present invention, its technological process is as follows figure 1 shown.

[0036] The specific design basis is as follows:

[0037] During normal production, the coal consumption of a single boiler is less than 14t / h;

[0038] Boiler slag discharge <8.5t / h;

[0039] The thickness of the material layer is 500mm, and the differential pressure of the material layer is 7-9KPa;

[0040] Cooling water volume of slag cooler 10—34t / h

[0041] Implement the method that the present invention applies PLC control system to implement the automatic control of material layer in circulating fluidized bed boiler:

[0042] When the boiler is in normal operation, after checking that the slag discharge system meets the opening conditions, open the water inlet and outlet valves of the slag cooler and pass water, then open the slag valve 8, start the PLC control syst...

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 control system and a control method for a material bed of a circulating fluidized bed boiler, and belongs to the technical field of boiler and automatic control. The control system comprises a hearth pressure gauge, an air compartment pressure gauge, a material bed thermometer, a slag cooler slagging thermometer, a slag cooler water outlet thermometer, a slag cooler water inlet thermometer, a slag cooler drive motor, and a PLC control system. The hearth pressure gauge and the air compartment pressure gauge are connected to a material bed differential pressure transmitter, which transmits electrical signals to the PLC control system; the slag cooler slagging thermometer, the slag cooler water outlet thermometer and the slag cooler water inlet thermometer send electrical signals to the PLC control system; and the PLC control system sends electrical signals to a slag conveying device and the slag cooler drive motor. The invention is safe, reliable and convenient for operation, and can improve utilization efficiency of boiler slag waste heat and production efficiency, and realize automatic control of slagging and real-time monitor for boiler material bed, so as to reduce production cost and labor intensity of operator, and facilitate control of the slag cooler to recover waste heat from high temperature slag.

Description

Technical field [0001] The invention relates to a boiler automatic control system, in particular to the control of a circulating fluidized bed boiler, and belongs to the technical field of boiler and automatic control. Background technique [0002] In a circulating fluidized bed boiler, the bed thickness has a direct impact on the fluidization state, bed temperature and heat transfer efficiency in the furnace, and a certain load of the boiler corresponds to an appropriate bed thickness. The bed thickness is basically proportional to the differential pressure of the material layer, and the thickness of the bed material is maintained at an appropriate value by adjusting the amount of slag discharge. The differential pressure of the material layer has a great influence on the stable operation of the fluidized bed boiler. If the material layer is too thin, the material layer is easy to blow through and cause channel flow, and the uneven fluidization will cause local slagging, ma...

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
IPC IPC(8): F23C10/30
Inventor 彭栋友张英
Owner 德阳劲达节能科技有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap