Catalytic hood inlet gate valve steam
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Catalytic friends, do you use cooling steam for the high-temperature gate valve at the entrance of the hood? If so, do you need to drain it? Do you need to manually open the valve frequently to drain the condensate? For dehydration, I would like to ask whether it is possible to install a trap or trap to achieve automatic drainage? Does the trap have any impact on the related equipment? Is it feasible to install the trap? I would like to ask friends, are there any high-temperature hood gate valves without catalytic devices that use water traps? ? ? This post was last edited by dxsy on 2009-4-25 00:21 ]
There is no need for a water trap. If it is filled regularly, the heat preservation effect will be good and there will be no accumulation of fluid.
If it is injected regularly, will the insulation effect be good? Will it cause fluid accumulation? What do you usually pay attention to? How to understand? Does the trap affect the insulation effect? Those heavy oil heating cables won't be affected, right?
Brother, do you understand? The heating wire continuously provides heat to the pipeline, and the heat consumed is constantly condensed by water, so add a steam trap. How long is your steam pipeline? The steam pressure and temperature, how much the temperature drop is, how much is the loss, can you roughly estimate whether water is generated?
The cooling steam of the flue gas butterfly valve enters the valve channel directly, and then enters the hood together with the flue gas. Steam serves two purposes: One is to cool the valve body ； The second is to purge the valve passage. Therefore, there is no need to install a water trap.
Generally, the high-temperature gate valve at the entrance of the hood is purged with steam, which is mainly added to prevent the valve channel and stuffing box from being clogged with catalyst. Because the temperature inside the valve is very high, there is no need for dehydration, but the temperature of the incoming steam should be higher.
The high-temperature gate valve of the hood does not need a head to purge steam, and the catalyst itself entering the hood is very small. It will increase energy consumption and is not safe. We have had an accident in which the stem of the hood inlet gate valve broke. Later, Lan Lian analyzed that it was too much steam and the catalyst "cooperated" to wear out the valve stem. Therefore, we later did not use the large valve passage of the gate valve to purge steam.
We do not use the purge steam of the hood gate valve, but only use the butterfly valve to purge steam. The condensate discharge under the gate valve does not need to be discharged at any time. We only discharge the catalyst. It is best not to use steam to prevent corrosion of the gate valve plate, because the sulfur in the flue gas easily combines with water to form sulfuric acid.
Thank you, I'm sorry, I'm talking about the high temperature gate valve at the entrance of the hood, usually in front of the butterfly valve. I just don't understand the internal structure of this gate valve with steam protection. Please give me some advice. Thank you very much. This post was last edited by dxsy on 2009-4-21 00:07 ]
One is to purge and the other is to protect the gate valve.
However, the steam cooling water definitely needs to be drained. How do you drain it?
The high-temperature gate valve at the hood inlet protects steam and has two functions:: One is to cool the valve body ； The second is to purge the valve passage to ensure that the gate valve can be closed tightly under accident conditions. As for whether to protect the steam from being discharged, it is not necessary at all, because the flue gas is over 600 degrees, and the steam will not accumulate liquid here at all, and it is unnecessary to install a water trap.
But we are required to drain the water every 4 hours, and there is a lot of water every time. Even though our gate valve is faulty and cannot be closed, the superiors still require us to insist on draining the water twice per shift. It is troublesome if there is a trap. It will be easy.