Regarding cogeneration
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This post was last edited by sunjl1981 on 2013-1-6 at 23:56. Our factory is planning to launch new chlor-alkali and PVC projects. Since we have a power plant, we intend to use the steam generated by that plant. The steam output from our factory’s power plant is around 130 kilograms. How can we reduce the pressure? I guess it uses the residual heat from the boiler to heat things up, right? Additionally, when I checked the heat enthalpy of steam, I found that that of high-pressure steam is actually lower than that of medium-pressure and low-pressure steam. Could someone please explain why? # ， ， &
The pressure after steam generation in your power plant cannot be 130 kilograms of pressure. The back-pressure type generally uses 10 kilograms of superheated steam, while the extraction-type allows for pressure adjustment. If your boilers are large enough, cogeneration is feasible. The reason why high-pressure superheated steam has a lower thermal entropy than medium- and low-pressure saturated steam can be understood by reading a book on principles of chemical engineering.
“The steam pressure in our plant’s power station is around 130 kilograms. How can we reduce this pressure? ” It can be connected to a temperature and pressure reduction device.
150,000, I think so. I’m not at the power plant so I’m not entirely sure, and I wasn’t involved in the expansion project either :(
The steam supply method is as follows: the temperature of the third-stage extraction steam from the high-pressure cylinder of the turbine is 250°C, with a pressure of 0.883 MPa. The steam used for PVC has a temperature not exceeding 200°C and a pressure of 0.6 MPa; therefore, it is used after being cooled and depressurized following the third-stage extraction
This question is a bit of a… lol
Comrade: Our factory carries out combined production of heat, electricity, and chlor-alkali products, and the power plant has its own independent power grid. The problem you mentioned can be easily solved – steam is delivered from the main steam pipe to various branch pipes, and the pressure in these branch pipes can be controlled using valves. To achieve automation and stable pressure, a self-acting control valve can be used. If there is no evaporation device for chlor-alkali production, a steam pressure of 10 kilograms is sufficient for the chlor-alkali plant.