Power-supply controller of electric dust collector and long-range control system of the same

Abstract

The invention provides a power controller of static dust collector and a remote control system for the controller. The controller comprises a rapping control module, a spark detecting module, a spark forecasting module and a charging ratio optimization module. The rapping control module is connected with the power of the static dust collector and a rapping executing device on a dust collecting plate in correct order to generate rapping period and rapping sustaining time required by various rapping modes as well as required constant voltage under various rapping modes; the spark forecasting module carries on second derivative analysis of second current waveform and determines generation of spark in advance; the spark detecting module carries on spectrum analysis of second current with sampling rate of 64 points to decide generation of small spark; the charging ration optimizing module calculates quality factor of a dust removing polar plate according to charging ratio, second current on one side of a load and second voltage and then charging ratio required by the power of the static dust collector is realized with hereditary screening method. In addition, the invention also realizes remote control on the power controller of the in-site static dust collector.

Description

technical field [0001] The invention relates to a power controller and its control system, in particular to an electrostatic precipitator power controller and its remote control system, belonging to the technical field of environmental protection equipment. Background technique [0002] Electrostatic precipitators are widely used in flue gas dust removal and material recovery in industrial sectors such as thermal power generation, metallurgy, building materials, garbage disposal and chemical industry. It uses electrostatic force to realize the separation of solid or liquid particles from the gas flow. A high-voltage direct current is applied between the discharge electrode and the dust collection electrode arranged at intervals inside the electrostatic precipitator to form an electric field to maintain a space sufficient to ionize the gas. Around the discharge electrode The gas will be ionized to form gas ions and electrons. When the dust-containing gas passes through the e...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the preset working mode is that the user cannot find the best charging ratio according to the analog limit value, spark rate and charging ratio in real time to adapt to the current operating conditions, so as to select the optimal control plan

Here, the secondary voltage, especially the first-order derivative of the secondary current is used to analyze the trend of spark generation. The shortcomings of the detection and processing of the above-mentioned sparks are:

Therefore, the first-order derivative reflects the rate of change of the secondary voltage and secondary current, which can only be used to capture the spark signal afterwards, and cannot meet the accuracy requirements of spark prediction

[0011]In addition, in the field of electrostatic precipitator power controllers, local area network is usually used to control multiple electrostatic precipitator power controllers locally by controlling the host computer software. The technology adopts 485 serial communication protocol, but the transmission rate of this method is relatively slow, only 9600bps, and the communication reliability is poor

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