Regulation of the pressure in an air-temperature type carburetor
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As the name implies, an air-temperature vaporizer uses air to heat low-temperature liquids. So, could adjusting the pressure of the outlet gas based on the amount of feed material result in insufficient vaporization at high temperatures, causing the pressure to reach the required level or even exceed it?
If there is a demand downstream of the carburetor, the pressure will not exceed the pressure in the storage tank. If the valve behind the carburetor closes, the increase in temperature and resulting volume expansion cause the gas inside the carburetor to return to the reservoir, raising the pressure in that reservoir. But these processes are not instantaneous, and the control valves on the storage tank can regulate the pressure properly. So there will be no overpressure. As for the effect of rising temperature on the amount of vaporization, I personally don’t think that will happen.
I’m not referring to the carburetor on the liquid storage tank, but rather a separate air-temperature type carburetor. After coming out of the storage tank, the cryogenic liquid is pressurized by a cryogenic pump and then sent to an air-cooled vaporizer; after vaporization, it is sent to the gas storage tank – that is the process.
Personally, I think it’s possible that the pressure will increase during the vaporization process; therefore, the outlet pressure of the vaporizer should be used to control the return valve of the liquid pump.
Generally, this does not happen; safety valves and vent valves are usually installed in the pipeline between the liquid pump outlet and the carburetor, to prevent overpressure during use or overpressure caused by the vaporization of liquid remaining in the carburetor. If there are no safety valves or vent valves, overpressure may occur.
On the fifth floor, after the liquid is vaporized by the air-temperature vaporizer, it enters the gas storage tank. Generally, a safety valve is installed on top of the gas storage tank to release pressure automatically when it becomes too high. As for the gas between the pump and the vaporizer after the pump stops operating, if the vaporization pressure becomes too high, it will be released directly through the vent pipe on the pump.
In other words, when it’s hot and the pressure is high, it’s necessary to reduce the feed rate; but what if the amount of vaporization isn’t sufficient? Could this situation occur?
It depends on the actual situation; if there isn’t enough volume, simply open the liquid outlet valve of the storage tank
As you yourself said, if the pressure is high, reduce the flow rate of the liquid outlet valve, or open the manual relief valve on the storage tank to lower its pressure – it depends on the specific situation. Whether to increase or decrease the flow rate depends on the reading on the pressure gauge; if the pressure is already approaching the overload level and you still keep the liquid outlet open at a high rate, overpressure will definitely occur
I understand what the original poster means. I think what they are referring to is that the temperature is too high, which results in sufficient pressure behind the carburetor but insufficient flow – this situation is possible. But I don’t think this will affect usage