Regarding the height of the lockbox flushing water tank
Thread Content
Some lower the height of the lockbox flushing water tank to the 6th layer of the gasification frame. What are the advantages and disadvantages? Is the flushing pressure sufficient to meet the requirements?
It seems this is as well a compromise solution devised to address the problem of excessive vibration in the lock hoppers, which has not been resolved for a long time. Starting with the first Texaco plant, the lock hopper flushing water tanks were designed to have a relatively high elevation difference, and subsequent design firms have continued to use this approach to this day. Regarding the issue of lowering the height of the lockhopper flushing water tank, the following views exist: 1. The advantage is that it further reduces the vibration during slag discharge from the lockhopper. 2. The downside is the insufficient flushing pressure you mentioned. 3. Lower the height of the lock hopper flushing water tank to the 6th layer of the gasification frame; in practice, the flushing pressure is sufficient to meet the requirements. So, the drawback of point 2 is no longer a problem. 4. In practical operation, problems with the flushing pressure of the lock hopper are rare; the flushing of the lock hopper depends mainly on the liquid level in the flushing water tank, that is, the amount of water used for flushing. Generally, it is sufficient if the volume of water is more than twice the volume of the lock hopper. Of course, lowering the position will only extend the slag flushing time by a few seconds.
The analysis upstairs is quite accurate. Second, insufficient flushing pressure can lead to excessive bubbles in the lock cylinder, thereby prolonging the time required to pressurize the lock cylinder.
It mainly relates to the flushing and water replenishment time for the lock hopper; during operation, of course, the shorter the time during which the lock hopper is not in a slag-collection state, the better.
It’s no longer a matter of which floor it’s installed on; it depends on how tall the specific gasification furnace frame is. Meeting the stamping requirements is the most important thing; as long as the installation technique is good, vibration can be easily managed
By modifying the lock-hopper slag discharge procedure, the vibration problem is resolved.
Brother on the 6th floor, could you explain how to make the changes? Explain it, it’s about technology sharing, right?……
I tried to answer this as well; I heard from an expert at HaiChuan that simply extending the operating time of the slag locking valve at the bottom of the slag tank would work, and this has been proven through practice.
It should be the case that the shutdown time of the slag discharge valve is increased, and the low-level alarm setting for the flushing water tank is adjusted slightly.