If for example the entrained gas flow rate is changed, the mixing diameter will also change – which will have some impact on the discharge pressure. The program calculates the best nozzle and mixing diameters based for the input values. Mixing section diameter is a function of the preceding and entrained gas flow rate, pressure, temperature & molecular weight. Motive nozzle diameter is a function of motive gas flow rate, pressure, temperature & molecular weight. The nozzle and mixing section diameter are calculated. The key results and supplementary results are shown below. In the updated revision of the software, flow rate input units should be selected as either kg/hr or Nm3/hr. The inputs required are shown in the table below. Please understand that this program is for your use only and prevent access by any outside party. The USER CODE will be supplied to you separately and must be entered every time you run the program. Transmitted as XXX.jpg to allow electronic transmission. This ejector operates with parallel with the running ejector till the vacuum reaches 500-600 mm of HG column, then the hogger ejector is switched off and main ejector will remain in service.This is a Visual Basic program with Interactive forms. This ejector is known as the starting ejector which is used to pull the gasses at the time of starting of system. There are generally two types of ejector generally used as, Hogger Ejector :.

The condensate water of steam send back to re use through steam traps.

The air flow can be measured by the rota-meter. The second stage ejector handles the non condensate gasses of first stage ejector and through a vent opening to the atmosphere. The inter condenser are designed with a special inter condenser baffles of tubes where heat transfer takes place. The mixture then enters to an inter condenser where the steam is condensate. So due to pressure difference or vacuum it sucks no condensable air and fluid from the system. When a high pressure motive fluid (steam/liquid) enters the steam nozzle, this result in a decreasing pressure and increasing velocity of the fluid again the fluid enters in the diffuser which result in a increasing pressure and decreasing velocity of the fluid so due to pressure difference vacuum is created in between the nozzle and diffuser we can say venture throat. It generally consists of converging nozzle, diverging nozzle, diffuser throat, inlet and outlet pipes, Rotameter for measurement of air flow, cells with tube for regeneration heat transfer, Steam traps for drip control. The amount of air extracted at the time of starting is more as compared to running unit. It removes air from the condenser and provide vacuum. The main function of the ejector is to extract air and no condensate gasses from a closed system.

Steam jet ejector design software