What is main line control and what is secondary line control?
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In a catalytic cracking unit, when the fresh feed for the reaction is interrupted, instrument failures are addressed by switching to bypass control. What are mainline control and bypass control? Thank you
Is the self-regulating cutting function no longer working, so a bypass is being used instead?
Mainline control generally refers to automatic regulation control, while the auxiliary line represents a control method in which manual control is used when the automatic regulation system cannot function properly.
I feel that secondary control should be used when a low flow rate is required, while primary control should be employed when a high flow rate is needed~ This is how the fuel gas in the SW cracking furnace is controlled! Hehe
The main line is controlled using a control valve, while the secondary line is controlled by a bypass valve, right?
Main line control refers to valve control, while secondary line control is bypass control. Generally, when starting to drive or when low flow control is required, the auxiliary line is used first for adjustment; when high flow is needed, the main line is used for adjustment!
In our workshop, automatic adjustment is used as the main control method, while manual adjustment serves as the secondary control method.