Project Name: Wuhan Petrochemical two catalytic unit raw material inlet valve flow characteristics of the project
Project time: November 2013
Project location: Wuhan, China
In the riser raw material inlet valve for Wuhan Petrochemical No.2 FCC unit FV105, FV106 and of raw materials input control requirements are very precise, especially regulating flow between the 60T~70T need adjusted according to the amount of each 0.5T, due to the regulation accuracy high the valve fluctuations in investment run automatically after there will be 5% ~ 10%, serious impact on the normal production, users can only be changed to manual operation, but in each given valve position only in accordance with the 0.5% set, even so the positioner of the dead and the valve itself error or cannot achieve precise regulation. The valve before 2013 at least modified four times, three famous brand in the domestic regulating valve Jun provide corresponding products, but in the end can not meet the process requirements.
Users and in 2013 05 months to my office to help, in the understanding of the detailed technical parameters after a special tailor-made for the two control valves.
The specific parameters are as follows: medium: heavy oil temperature: 200
We choose the DN50 sleeve control valve, the flow hole to do a special design, that is, the:
When the flow rate is below 33T, the flow rate is equal to the percentage; the flow rate is 60T~70T, the flow rate is linear, and the flow rate is 70T and the flow rate is equal to that of the hole. So that it can meet the small flow and large flow regulation at the same time can meet the 60T~70T flow valve opening in the 56%~75% between the precise regulation. To achieve the design flow characteristics of the partition section.
This valve since November 2013, after the installation commissioning has not any problem, at the same time the process reflected wave phenomenon of this valve is not automatic control is very stable.
