Diesel hydrogenation turbine
Thread Content
For diesel hydrogenation, I use a back-pressure turbine. The steam pressure in Central Asia is around 3.4 MPa, while the pressure of the low-pressure steam, that is, the back-pressure steam, is around 1.0 MPa. At present, as the back-pressure steam pressure increases, the flow rate of this steam also increases; as a result, more low-pressure steam is produced by the unit, which leads to reduced energy consumption. What I would like to ask is whether the relationship between back-pressure steam pressure and its flow rate is indeed as I have observed – that is, the higher the back-pressure, the more steam is produced? Thank you for your guidance
Yes, there is a positive correlation between backpressure steam pressure and backpressure steam flow rate. In other words, as the backpressure steam pressure increases, the flow rate through the backpressure turbine also increases. Therefore, as the back pressure increases, the low-pressure steam produced per unit of energy consumption also increases, and the energy consumption decreases accordingly. It should be noted, however, that if the back pressure is too high, it may affect the performance and efficiency of the turbine. Therefore, in practical operation, it is necessary to control the range of backpressure steam pressure to achieve the best energy consumption efficiency. .
But I’ve seen a lot of content online saying that the higher the back pressure, the higher the energy consumption
Compared to low-pressure steam systems, the higher the backpressure steam pressure, the greater the flow rate; as a result, the energy consumption of the system is lower. However, more medium-pressure steam is used, which leads to higher overall energy consumption, and it also increases the load on the turbine. Therefore, it is necessary to maintain an appropriate range for the backpressure.
The higher the back pressure, the greater the energy consumption. Economic factors must be taken into account, as well as the pressure difference issue; if the pressure of the 1.0 MPa steam drops too low, it will not be able to enter the towers that use steam for stripping.
When the back pressure is high, the main steam valve also opens wider, and more medium-pressure steam is used; energy and mass are conserved