Texaco: How to accurately determine blockage in the quench ring?
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Texaco: How to accurately determine blockage in the quench ring? ? ?
First, the flow rate of the quench water decreases; check whether the filter is clogged, and verify if the quench water control valve is fully open. Check the bypass line to see if there are any changes – if nothing changes, then try using direct make-up water to see if it can be added. If even direct make-up water cannot be introduced effectively, then the temperature at the process gas outlet increases. Based on these observations, it can be concluded that the quenching loop is clogged. If a blockage is detected, it’s time to prepare for shutting down the system.
Based on the changes in differential pressure in the quench water system, slag formation in the burner can also be detected using differential pressure.
A comprehensive consideration is needed, taking into account any changes in the flow rate of the quench water, the pressure difference across the black water filter, the liquid level in the quench chamber; the most noticeable change is likely to be in the temperature at the outlet of the syngas from the gasification furnace.
1. Process gas outlet temperature. 2. Quench water flow rate: Determine whether the filter is clogged by observing the pressure difference between the pressure gauges before and after the filter; if not, it is the quenching ring that is clogged.
The most obvious sign is a low flow rate; if this is accompanied by a high temperature of the process gas at the outlet, it is necessary to check whether the downcomer has been burned through. Consider the filter pressure difference, as well as the pressure at the outlet of the cooling water pump, or the possibility that a valve seat has fallen off and is causing false readings from the instruments. Another way to determine the issue is to open the standby cooling water valve and see if the flow rate increases. If it doesn’t, then the cooling ring is definitely blocked, and the system should be shut down
1. Rule out issues caused by the pump, pipelines, filters, and flow meters. 2. The above can be tested to rule them out one by one. 3. It can be determined that the blockage in the quenching ring can be assessed based on the furnace’s operational data; it is not necessarily necessary to shut down the furnace, as there are various ways to gradually restore normal operation.
1 Temperature of brick slab 2 Outlet temperature of syngas 3 Pressure difference of quench water
How can this be restored? Please explain in detail, master. Thank you:handshake