The main steam-ejecting ejectors working at combined heat and power plant and state district power station as a part of the service equipment of steam-turbine installations are in the majority carried out multistage (2 or 3 steps) and equipped with heatexchange pipe systems.
As a working body in the steam-ejecting ejector is water vapor, after it executes the main working function, it is necessary to bring out of the ejector. The pipe system is also intended for the purpose of condensation of the mix which is in the case.
Steam-air mix, leaving the diffuser of the corresponding step, gets to the case of the ejector equipped with pipe system with the cooling water which is passing on a heatexchange pipe. Steam-air mix sharply cools down and is condensed on heatexchange pipes, further is removed from the ejector through drainage branches.
Heatexchange pipes of system are made of L68 Brass.
Characteristics of the EP-3-2 ejector are given below:
1. Working steam:
а). Expense: 850 kg/h;
б). Pressure is manometrical: 4 kgfs/cm2;
в). Temperature: 156-160 0C
2. The cooling water (condensate):
- minimum: 70 t/h
- maximum: 200 t/h
б). Pressure: 16 kgfs/cm2 (at)
в). Temperature: 26 0C
г). Hydraulic resistance
- at an expense of 70 t/h: 0,5 m of water column;
- at an expense of 200 t/h: 8,2 m of waters. St
3. The sucked-away air (dry):
а). Productivity on dry air: 85 kg/h
б). Pressure of absorption of Iy of a step: 0,033 at