Water flash evaporation of coal water slurry gasification slag
Thread Content
Is it good to control the low point of the low flash pressure in water-coal slurry gasification? Does it have an impact on the flashing operation?
Pressure-controlled low-flash evaporation yields good results, but equipment layout must be taken into consideration. In some cases, the low-pressure flash tanks are located below the vacuum flash tanks; in such cases, gravity and vacuum are used to convey water into the vacuum flash tanks, so the issue of smooth drainage needs to be addressed.
Low pressure and an excessive amount of low-flash gas entering the deaerator can affect the liquid level and pressure control in the deaerator? It will cause excessive vibration in the deaerator
Pressure control for low flash point is highly influenced by equipment related to the low flash point, as well as by the equipment and processes involved in achieving that low flash point itself; adjustments need to be made based on the actual conditions. Specifically, if there are no major issues with the low-flash inlet angle valve, the anti-backflow baffle, and the short pipes, it is possible to lower it appropriately ； The low operating pressure at low flash is beneficial for system heat recovery, and it can also reduce the thermal load of true flash ； Low flash provides heat to the deaerator, which helps reduce steam consumption, but it also accelerates wear on the gas-phase pipelines.
There shouldn’t be too much ash in the low-pressure flash vapor, right?
In the case of low flash, the amount of vaporization is limited, the pressure difference is low, and the amount of ash carried along is limited as well.