Discussion on whether steam heating controls condensate or steam
Thread Content
For steam at a pressure of 70 barg, used for heating equipment and reaction vessels with continuous feed and discharge, should the equipment temperature or reaction temperature be linked to the steam, or to the condensate? What are the advantages and disadvantages? ? The steam flow rate is around 4 t/h
In option A, the amount of steam used for heating remains constant, and there is no control over the bottom temperature； In option B, the bottom temperature is controlled by adjusting the condensate flow rate; changes in the condensate flow rate affect the steam heat exchange area, which in turn influences the bottom temperature. Plan A does not directly control the production parameter T; if the bottom temperature changes for other reasons (other than steam-related factors), Plan A is powerless to do anything about it ； Plan B directly controls the production parameter T; whether it is steam factors or other factors that cause a change in temperature T, Plan B can make adjustments accordingly. However, changing the steam heat exchange area by adjusting the condensate discharge volume affects the bottom temperature, resulting in a significant delay and untimely adjustment. It is advisable to install a control valve on the steam pipeline to ensure smooth drainage of condensate water. When the bottom temperature decreases, increasing the steam flow rate alters the steam pressure inside the steam heater, which in turn changes the heat transfer temperature difference and thus affects the bottom temperature; as a result, the lag is significantly reduced, allowing for timely adjustment.
Isn’t that the case with you? The pressure is so high
The equipment temperature is under interlocked control with the regulating valve for the incoming steam, with the steam flow being controlled to adjust the equipment temperature.