Design of control of steam heater and condensate tank level regulating valve of waste heat recovery device
Thread Content
In the heat medium water/steam heat exchanger in our waste heat recovery device, the condensate water flows out from the lower end of the heat exchanger into the condensate water tank. Run a pipeline from the upper part of the same end of the heat exchanger to the upper part of the condensate tank. What is this pipeline used for? Is the direction from the heat exchanger to the condensate tank or is the condensate tank flashed and then the steam recovered? The direction arrows on the drawing are contradictory. Also, the condensate tank outlet regulating valve is designed to simultaneously control the liquid level of the condensate tank and the temperature of the heat medium water after heat exchange by the heat exchanger. How is this control principle? The system class talks about cascade control. How to set up the regulating valve if it is automatically controlled? Controlling liquid level or controlling temperature?
The steam heat exchanger seems to be used to recover non-condensable gas. The steam cannot be completely condensed into condensed water. Open a hole at the top to discharge the non-condensable gas in time to improve the heat exchange efficiency.
This post was last edited by altpage on 2021-12-30 10:19 Pressure balance function, the gas connection keeps the liquid level in the condensate tank and the heat exchanger balanced, the liquid level in the condensate tank decreases, the gas phase space in the heat exchanger increases, the steam volume increases, and the temperature increases, and vice versa； This achieves the purpose of controlling the temperature of the heat exchanger by controlling the liquid cascade through the liquid outlet valve of the condensate tank.