A Study On Failure Diagnosis Of Control Valve In Chemical Fertilizer Equipment

The control valve has an important role in the fluid gengineering. It is a actuator in the fertilizer equipment, which causes the safety and stability of the work of the fertilizer equipment.The failure of the control valve directly affect the normal production of chemical fertilizer.Firstly, the control valve is catergorize by its function. And the principle and main technological parameters are discussed. Then, the failure theory of the control valve are analyzed. Finally, the solution for the failure of the control valve is given according to the different failure of the control valve.There are many ways to adjust the valve, the working principle is complex, and the performance parameters are many. Where the failure occurred in the part of the valve core, valve seat, packing, valve stem, actuator, valve positioner, solenoid valve, amplifier and other accessories, as well as gas supply system, power system and control system. The external manifestations of the form of a card, blocking, leakage, no action, action is not in place, etc.. The main reason for the failure of the main reason is that the control valve selection is not scientific, resulting in the nature of the unsafe; the installation is not reasonable, man-made cause failure; maintenance is not timely, not completely, so that the failure to expand and serious; maintenance is not in place, there is no fault in the bud. To solve the problem of regulating valve failure, must be strict selection, installation, maintenance and maintenance of four points, four aspects are indispensable. Especially in the maintenance, not only to do a good job of traditional fault maintenance, but also to do a good job of preventive maintenance, as far as possible application of predictive maintenance. By regulating valve fault identification, cause analysis and the measures taken, so as to minimize the failure rate of the control valve. The application of the control valve of the large chemical fertilizer plant in Tarim Basin is special and representative, and the fault treatment of the regulating valve of the fertilizer plant is described by the examples in the field.