Environmental issues related to stable sweeping in catalytic cracking distillation
Thread Content
I would like to ask everyone: during shutdown for maintenance and the cleaning of the catalytic cracking absorption and stabilization system, where does the gas in the system go?
Can’t steam be introduced at the start of the torch? The steam was not released until the end; by that time, the drain valve at the lower point had already been opened to allow exhaust. Let’s see how you guys sweep
You can ask those colleagues of yours who are good at technology
It seems that the torch sweeps the line at the end; by that time, the condensate drainage, which relies on stable absorption at low levels, has already started.
First, relieve the pressure in the gas pipeline network, then switch to a low-pressure flare for pressure relief; a good practice during purging is to use the condenser to condense the gas before it enters the flare
Our unit doesn’t have this cooler; do you have one?
Due to the increasingly strict environmental regulations in recent years, the cleaning temperature of low-wattage systems must not exceed 50°C; therefore, steam cannot be used directly for cleaning these systems. We follow this process: connect to the safety valve bypass lines at the top of each tower – proceed to the low-wattage systems within the facility – then to the safety valve bypass lines at each tower – followed by the rich gas lines at each tower – and finally to the air-cooling and water-cooling systems – (condensate from the crude gasoline tanks is sent to the compressor). From there, the fluid moves on to the low-wattage systems for flare disposal.