How to convert atmospheric pressure steam into high-pressure steam?

Steam at 1 MPa can theoretically be increased to 4 MPa by applying pressure with a valve. In fact, the current 1MPa is also achieved by applying pressure through a valve. You just need to consider whether your steam drums, pipes, and valves can withstand a pressure of 4 MPa. Your current pressure tolerance level is designed based on 1 MPa. It’s fine as long as it’s confirmed to be okay. Also, it’s necessary to consider whether there is enough heat source.

So what type of valve should be used to hold back the pressure?

Use a stop valve or a control valve, as both types offer good controllability. It is best to use control valves, as they can enable automatic adjustment in conjunction with instrument circuits; whereas simple stop valves can only rely on manual operation to maintain pressure stability.

Check whether the compressed components are suitable for use; do not increase the pressure and temperature blindly, as this can lead to life-threatening consequences!

Haha, that’s very unlikely. Is the 1MPa steam you mentioned saturated or superheated? If it is superheated, what is the degree of superheating? Saturated steam turns entirely into condensed water as soon as slight pressure is applied ； Overheated steam can also only be compressed to a saturated state (for example, steam at 260 degrees and 1 MPa can be compressed to 4 MPa, but what is used for compression?). Which compressor can withstand such high temperatures? Using a valve to hold back pressure is even more unbelievable – once you close the valve at the back, can the steam from ahead still flow through? And how can the pressure be increased to 4 MPa in such a situation? Even if you hold back the pressure in the generator, wouldn’t the pressure behind the valve be lower due to throttling by the valve? I’ve only heard of pressure relief valves; I’ve never heard of pressure increase valves, haha. Sorry, it seems like this question is something a college student who has just started working in the factory would ask. This post was last edited by Shujian on 2009-4-11 at 09:59.]

First, you need to check whether your system meets the safety requirements: what is the design pressure of the steam generator, is it 4 MPa? And what is the setting pressure of the safety valve? Do the design pressures of the pipelines and various equipment also meet 4 MPa? If the above conditions are met, it then depends on whether your heat source can heat the water to above 252°C. If it’s met, then that’s fine. (The actual pressure generated is determined by both the heat source and the pipeline resistance.)

I don’t even know how to answer this question! It’s not that you can apply pressure whenever you want; it depends on whether the design allows it. Safety comes first! If all conditions are met, then, as the people above mentioned, it’s a matter of providing heat through wind and fire; once this issue is resolved, both pressure and temperature will increase! As for what type of valve to use, as long as it is safe and reliable, any type of valve will do. Of course, control valves are the preferred choice; otherwise you’ll have to keep manually turning the valves to adjust the pressure!

While ensuring that the system can withstand a pressure of 4 MPa and the steam temperature at that pressure, the atmospheric-pressure steam is reheated; as the temperature rises, the steam pressure increases accordingly.

Reply to floor 6. There is some truth to what you say. However, it should be understood that the level of system pressure is determined by the amount of gas generated in the drum and the amount of steam consumed; if the amount of gas used is greater than the amount generated, the system pressure will never rise. Not to mention 4 MPa, even 1 MPa cannot be guaranteed. The premise of pressure is that the gas production volume must be greater than the gas consumption volume to ensure it. As long as the drum pressure can reach 4 MPa and the system’s gas consumption is less than the amount of gas generated by the drum, and considering other factors such as pressure resistance and heat sources, there is no problem in switching the system to operate at 4 MPa. Sometimes, questions posed by new workers also require careful consideration before answering.

Going back upstairs, the pressure of the high-temperature steam produced by the steam generator (which is homemade and uses multiple layers of pipes for heating) is below 1 MPa, as mentioned by the person in charge. To achieve a high-pressure steam level of around 4 MPa, it would be necessary to replace the boiler feed pump, pipelines, valves, flanges, gaskets, and the steam drum. Using just one valve alone is not sufficient to reach a pressure of around 4 MPa; current technology does not allow this.