Water Ejector Vacuum System Pdf

In general the diameter of the piping between the process and the ejector system must be at least as large as the suction connection in the first stage ejector. Two actual case studies conducted by service engineers on cvdu ejector systems show how to troubleshoot ejector problems. Water vapor pressure table vacuum range saturated steam 15 abl5 water vapor temperature table vacuum range saturated steam 16 abl5.

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The water jet eductor is a type of ejector which utilizes the kinetic energy of a pressurized liquid to entrain another liquid mix the two and discharge the mixture against a counter pressure.

Water ejector vacuum system pdf.

Also referred to as ejectors are devices for the conveyance compression or mixing of gases vapors liquids or solids in. The first problem was a result of improper replacement of an intercondenser and the second was a result of. Water re cycle system for vacuum pumps for the total reduction of effluent. Water pressurized by a hydraulic pump as a motive fluid is used in the two phase ejector vacuum pump systems šarevski et al 2004 2009b and also in the concentrator thermo compression systems šarevski et al 2005a 2011a for compression of the water vapor from the evaporating to the condensing pressure.

All these ejectors can be installed at ground level or at any higher elevation and can be installed at water re circulation tank to minimize pressure drop. So for example the suction pres sure cannot be below 23 mbar 17 5 mm hg for a jet ejector with water as a. Ejectors of this type are used throughout industry for pumping and mixing operations. In an ejector a working fluid liquid or gaseous flows through a jet nozzle into a tube that first narrows and then expands in cross sectional area.

1 is a photo of an installed ejector at a cvdu. Vacuum systems 113 vacuum systems 115 gdp1. Ejectors vacuum systems chem process has been designing steam jet thermocompressors since decades and each unit is designed specifically to suit a customer s process and. Liquid jet vacuum ejectors can extract gases and vapours and compress them.

Vacuum piping paragraph 6 3 of the heat exchange institute s standards for steam jet vacuum systems 4th ed details the pro cedure for calculating pressure drop in vacuum systems. A vacuum ejector or simply ejector is a type of vacuum pump which produces vacuum by means of the venturi effect. The offered systems use water as the motive force and kinetic energy of water to entrain vapours and gasses. In the case of liquid jet vacuum ejectors the achievable suction pressure at zero load corresponds more or less to the vapour pressure of the motive liquid.

Ejector and condenser problems in vacuum ejector systems. As per the suction pressure requirement the first stage ejector. Application water jet eductors have numerous uses in the plant such.