How to recycle the 0.6 MPa excess low-pressure steam in the system
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I’m seeking advice from experts – is there any good solution? In my company’s nitric acid production facility, the condensate water generated after heat exchange using 1MPa steam is expanded to produce low-pressure steam at 0.6MPa, which is then sent into the low-pressure steam network. However, due to the small number of users who rely on this low-pressure steam, the pressure in the network remains high. It is necessary to allow a small amount of steam to be vented from the expansion device in order to prevent its safety valve from activating; otherwise, this leads to environmental noise and unnecessary waste of steam. Do any of you have any good ideas for recycling this low-pressure steam? Initially, I considered adding a pump driven by steam to address the issue of excess steam, but after checking around, I could only find piston pumps that are driven by steam; what I was looking for was a centrifugal steam-driven pump. Another option was also considered; small screw-type expansion power generation equipment could be found online, but very little information is available on it, which suggests that few units may be in use, and it’s uncertain whether the technology is mature. If any of you sea friends have good suggestions, please feel free to share them; thank you very much! Leave a message or send a private message to 610433708@qq.com
How much is the output of 6 kilograms of steam from a wealthy unit? The previous steam compressor can be considered, with pressure increased to 10 kilograms, and integrated into the 10-kilogram steam pipeline network
This post was last edited by henglinkou on 2020-5-26 at 10:18. There are often questions asked on the forum, but they aren’t stated in full. What is your steam output of 0.6 MPa? If it’s not much, it can’t be considered suitable for driving. It is recommended to consider the entire plant as a whole and study its steam balance; if heat can be utilized, that would be ideal. Additionally, could it be considered to use 0.6 MPa steam, which is then converted to 1.0 MPa steam via a heat pump for reuse, in order to reduce the amount of steam generated by the boiler?
It’s difficult to handle because the amount of gas released is not large; it’s estimated to be just over 1 ton.
It’s difficult to handle because the amount is small and there are no heat exchange devices available. It’s estimated to be a little over 1 ton of steam.
The pipeline network already has a deaerator in use, and the steam I’m referring to is the excess steam.
There’s only a little over 1 ton of steam in excess; it’s likely that there won’t be any excess during winter, so it’s not very useful. In actual operation, it is impossible to achieve complete balance of steam in any factory. It is recommended to consider the entire plant as a whole in order to optimize the heat exchange system, with the aim of reducing steam consumption in this area. For example, is there a vacuum pumping system? If so, a steam jet pump can be used instead. If you have the plant’s steam balance diagram, you can send it over; I’ll help think of a solution.
If there is a steam boiler, the condensate can be reused without depressurization.
A gas pump can be used; gas with a pressure of over 1 MPa is used to pump gas at 0.6 MPa, so that the final pressure at the outlet becomes 1.0 MPa
Everything has its advantages and disadvantages; taking the costs into consideration, using a steam pump is also an option.