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Material returning fault self-healing control system for circulating fluidized bed boiler

A circulating fluidized bed, fault self-healing technology, used in fluidized bed combustion equipment, fuel burning in a molten state, lighting and heating equipment, etc. problems, to avoid operational errors, improve safety, and achieve the effect of self-healing control of return failures

Active Publication Date: 2015-05-20
北京和隆优化科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to automatically eliminate the operation failure of the feeder due to the poor feeding and blockage of the return valve, so as to ensure the normal operation of the circulating fluidized bed boiler

Method used

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  • Material returning fault self-healing control system for circulating fluidized bed boiler

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Embodiment Construction

[0020] As shown in the accompanying drawings, a circulating fluidized bed boiler fault self-healing control system proposed by the present invention includes an input signal processing unit, an adjustment unit, an output signal processing unit, an operation output processing unit and a return air actuator.

[0021] input signal processing unit

[0022] The left blanking temperature TL and the right blanking temperature TR are connected to the input terminal of the temperature difference calculation and comparator DCC. The left blanking temperature TL minus the right blanking temperature TR is defined as the temperature difference. The upper limit of the temperature difference ranges from 20°C ~30°C, the lower limit of the temperature difference ranges from -30°C to -20°C, the temperature difference calculation and comparator DCC has 5 output terminals DCC-1, DCC-2, DCC-3, DCC-4, and DCC-5 respectively corresponding to the temperature difference If the temperature difference is...

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Abstract

The invention discloses a material returning fault self-healing control system for a circulating fluidized bed boiler. The system is characterized by comprising an input signal processing unit, a regulating unit, an output signal processing unit, an operation output processing unit, a left side material discharging temperature, a right side material discharging temperature, a left side material returning wind actuator and a right side material returning wind actuator. When the difference between the left side material discharging temperature and the right side material discharging temperature exceeds a certain threshold value, the condition that a material returning fault exists on one side with low temperature is judged; in a fault mode, a temperature difference regulator outputs a regulation signal to increase the opening of one side material returning wind actuator which is in a material returning fault state until the fault is eliminated; and after the fault is eliminated, the opening of the side material returning wind actuator is recovered to the original value before the fault appears, the temperature difference regulator actuates output tracking, thereby realizing the undisturbed switching of the control system.

Description

technical field [0001] The invention relates to a circulating fluidized bed boiler operation failure self-healing control system, in particular to a circulating fluidized bed boiler return material failure self-healing control system. Background technique [0002] Circulating fluidized bed combustion technology is a clean coal combustion technology recognized at home and abroad. Circulating fluidized bed boiler has unique advantages such as wide fuel adaptability, low cost of desulfurization in the furnace, less pollutant discharge, high combustion efficiency, large load regulation ratio and comprehensive utilization of ash, and has become the most successful clean combustion technology in the practical process. At present, the power industry is developing rapidly in the direction of industrialization and large-scale. [0003] When the circulating fluidized bed boiler is in operation, the function of the feeder is to transport the circulating ash separated by the separator ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/28
Inventor 于现军
Owner 北京和隆优化科技股份有限公司
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