High-voltage control system and method for converter electrostatic dust removal process
A technology of high-voltage control and electrostatic dust removal, which is applied in the field of converter electric dust removal, can solve problems such as difficulty in meeting emission requirements, low power factor, and large harmonic pollution, so as to improve dust removal power and power saving level, ensure dust removal power, and improve system The effect of electric power
Active Publication Date: 2017-04-05
BEIJING BOQIAN ENG TECH
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Problems solved by technology
[0004] However, during the converter smelting cycle, especially in the feeding, oxygen blowing early, late, and slag splashing stages, the short cycle and temperature fluctuations lead to large changes in specific resistance, and the rapidly changing dust specific resistance will cause constant changes in the voltage limit of flashover
However, the existing single-phase thyristor amplitude modulation control system has factors such as low power factor (below 0.7), large harmonic pollution, and slow dynamic response, so it is difficult to meet the emission requirements in the above process stages
In addition, due to the low electrical efficiency of the single-phase thyristor control system (only about 64%), only a high-power single-phase system can be used, resulting in large power consumption
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[0021] It should be pointed out that the description and sequence of specific structures in this section are only descriptions of specific embodiments, and should not be considered as limiting the protection scope of the present invention. In addition, the embodiments in this section and the features in the embodiments can be combined with each other under the condition of no conflict.
[0022] Please also refer to figure 1 and figure 2 , the method and system of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0023] The high-voltage control method of the converter electrostatic precipitator process in the embodiment of the present invention may include: processing the received primary current feedback value, secondary voltage / current operating value, electric field dust concentration and converter smelting process operating state according to the preset control model , to obtain the corresponding con...
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The invention discloses a high-voltage control system and method for an electrostatic dust removal process of a converter. The high-voltage control method for the electrostatic dust removal process of the converter includes the steps that a received primary current feedback value, a received secondary voltage / current operation value, the received dust concentration of an electric field and the received operation status of the smelting process of the converter are processed according to a preset control model, so that a corresponding control range is obtained; according to the relation between the primary current feedback value and the control range, an insulated gate bipolar transistor (IGBT) trigger signal of reversing frequency conversion is provided for an IGBT executing mechanism; and a direct current supply is provided for an electric dust precipitator through a high-voltage rectifier transformer electrically connected with the output side of the IGBT executing mechanism. By the adoption of the scheme, the dust removal effect and the dust removal efficiency of an electrostatic dust removal system of the converter can be improved effectively, the lowest electric power of the electric field is output under the premise that dust emission reaches the standard, and the electricity saving level is improved.
Description
technical field [0001] The invention relates to the technical field of converter electrostatic dust removal, in particular to a high-voltage control system and method for converter electrostatic dust removal technology. Background technique [0002] At present, with the structural adjustment of the iron and steel industry, the steel-making converter has tended to be large-scale (up to 120 tons to 300 tons), and most iron and steel enterprises adopt the three-step smelting process of the converter to improve the purity of molten steel. In order to reduce production costs, domestic Large-scale converter steelmaking generally adopts converter slagging plus lime and dolomite process, because the slagging material contains a large amount of powdery CaO, which can lead to drastic changes in the dust composition in the instantaneous recovery flue gas, which greatly increases the difficulty of dust emission control. At present, many large-scale converters still use wet dust removal,...
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IPC IPC(8): B03C3/68
Inventor 杨涤李崇坚
Owner BEIJING BOQIAN ENG TECH