Automatic following control system for corona discharging ozone generator frequency
An ozone generator and corona discharge technology, applied in ozone preparation, use feedback control, etc., can solve problems such as increased power consumption, dynamic drift of load characteristics, and reduced output and efficiency of ozone generators
Active Publication Date: 2015-02-04
JINAN RUIQING OZONE EQUIP
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Problems solved by technology
When the equipment is running, the corona discharge ozone generator will experience dynamic drift of its load characteristics, and the resonant frequency of the equivalent circuit of the corona discharge ozone generator will change, resulting in a reduction in the output and efficiency of the ozone generator, and Increased power consumption
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[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown, when the applied voltage across the load of the ozone generator is lower than the gas discharge start voltage Vs, the discharge channel does not discharge, and the ozone generator can be equivalent to the gap capacitance Cg of the discharge channel and the insulating dielectric capacitance Cd connected in series . When the applied voltage is higher than Vs, the discharge channel starts to discharge, and the oxygen in the discharge channel generates ozone due to the discharge.
[0027] The insulating dielectric capacitance Cd basically remains unchanged, but the total equivalent capacitance of the load has the characteristics of changing with the change of the applied voltage, oxygen pressure, flow rate and temperature. The equivalent circuit is as follows figure 1 Shown, where the resistance R is equivalent to the energy consumptio...
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The invention discloses an automatic following control system for corona discharging ozone generator frequency. The automatic following control system for the corona discharging ozone generator frequency is formed by a PLC (Programmable Logic Controller), a high-voltage capacitance measuring instrument and an ozone generator; the ozone generator is formed by a variable-frequency power source, a transformer and an ozone discharge chamber; the high-voltage capacitance measuring instrument is connected with the ozone discharge chamber; the PLC controller is connected with the high-voltage capacitance measuring instrument and feeds back a frequency signal detected by the high-voltage capacitance measuring instrument to a frequency adjusting terminal of the variable-frequency power source; a control rule of the PLC changes along with change of the natural resonance frequency of an equivalent circuit of the ozone generator; the variable-frequency power source after frequency adjustment through the PLC is connected with the transformer; the transformer is connected with the ozone discharge chamber; the transformer is a frequency adjustable boosting transformer. According to the automatic following control system for the corona discharging ozone generator frequency, a novel ozone generation system works in a resonance state all the time and a maximum output efficiency is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of producing ozone and its use, and in particular relates to a corona discharge ozone generator frequency automatic tracking control system. Background technique [0002] At present, large-scale ozone generators generally use the corona discharge method, using a high-voltage current of a certain frequency to create a high-voltage corona electric field, so that the oxygen molecules in or around the electric field undergo electrochemical reactions to produce ozone. Moreover, the current international large-scale ozone generator with an output greater than 1kg / h usually adopts a discharge frequency of 500-2000hz and a discharge voltage of 4000v-8000v according to the discharge medium. [0003] However, as the load of the ozone generator, that is, the voltage applied outside the ozone discharge chamber, the oxygen pressure, the flow rate of oxygen, and the temperature change, the total equivalent capacitance of ...
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IPC IPC(8): G05D3/12C01B13/11
Inventor 赵敏夏凯赵凤明
Owner JINAN RUIQING OZONE EQUIP