The difference between open condensate recovery unit and closed condensate recovery unit

The utility model relates to a steam condensate recovery device, which is used for recovering and utilizing the heat of condensed water (including flash steam heat) and softening water. Generally used to open and close the device.

The condensed water collecting box 1, open the steam condensation water recovery device is open, with the atmosphere, due to condensation of water into the collection box when the pressure suddenly drops, the water temperature is higher than the boiling point of the pressure corresponding to the two times, resulting in a large number of flash steam, condensate water temperature is about 100 DEG C remaining. In fact, due to flash heat or sometimes in order to prevent the delivery of pump cavitation and into the cold water, recycled water temperature is only about 70 degrees celsius. In addition, there will be a way to open the air into the boiler condensate recovery pipeline, pipeline corrosion. But the open device is simple, less investment. Compared with the direct discharge of condensed water, there is still a certain energy saving effect.

2, steam condensate recovery closed condensate water collecting box type device is closed, the condensed water pressure within the system remains higher than atmospheric pressure, the condensing water temperature below the boiling point of the pressure, and make full use of the heat of condensation water. Moreover, the condensed water of the closed device can keep the original quality of the steam, and when the boiler is used for supplying water, the dissolved oxygen can not be increased, the water supply amount of the boiler is reduced, and the cost of water treatment is reduced.

Condensed water recovery device is closed recycling, depending on the relationship between system pressure and atmospheric pressure. If the steam pressure is P1, the calibration pressure of the boiler condensate recovery tank is P2, the atmospheric pressure is P0. When the P2 is closer to P1, the higher the closed degree of the recovery system, the higher the energy saving rate. On the contrary, when the P2 is closer to P0, the sealing degree of the recovery device is worse, and the energy saving rate is smaller. It is clear that the evaluation criteria of airtight device is P0, P1, P2 three of the size of the relationship. When P2=P0, it can not be called a closed recovery device, it becomes an open recycling device. The energy saving rate and open device is the same.