Analysis of the operation of SO2 fans

Operation test The control system is installed on the newly developed multi-function cleaning machine for 100 hours. The work is stable and the response is fast, which fully meets the design requirements. However, in a period of time, the washing machine is not working properly. When the actuator is closed, the engine runs at a high speed, and the pump outlet pressure continues to rise. However, once the actuator is opened, the engine immediately drops to an idle state, and the pump outlet pressure drops. Very low, the spray gun has only a small amount of liquid outflow, and this phenomenon is repeated several times. The pump inlet pipe interface is tightened and the fault disappears. The relay fan adopts the inlet guide vane adjustment, and the inlet guide vane drive is completed by the electric actuator. In the field actuator motor junction box, there is an opening degree generator, and the opening angle generator converts different vane angles into corresponding 4 ~20mA current signal. When it is static, if it is not synchronized, you can adjust the zero or span potentiometer correction.

After the different angles of the inlet guide vanes are converted by the opening current, the angle of the inlet guide vanes of the online fan can be read out on the display by A/D conversion. The inlet guide vane angle operation can be divided into electric, manual and remote control modes. If the inlet guide vane angle is controlled in the control room, the inlet air volume of the fan is read by controlling the DCS system, and the output signal is changed according to the process requirements to reach the remote control fan. The angle of the inlet guide vanes to meet the needs of production. In this paper, the practice and experience of SO2 wind turbine operation analysis and maintenance can be used for reference and reference by relevant design units and manufacturers. This is mainly due to the air in the pump outlet pipe, which makes the overflow pressure regulating valve and the speed regulating valve not work properly. Under normal circumstances, after the engine is started, the engine is in idle working state before the pump outlet pressure is established. For example, if there is no air in the pump outlet pipe, after the pump works for a period of time, the liquid return bleed pressure and the lance outlet pressure rate are higher than the pump supply. The pressure increase is slow, the outlet pressure is gradually increased, and the speed regulating valve gradually increases the engine throttle under the action of the pressure, and the engine gradually reaches the high speed working state.