Table of Contents
- 1 What are the primary parts of an ejector?
- 2 What is the function of ejector?
- 3 What is difference between ejector and eductor?
- 4 How does a vacuum ejector work?
- 5 What are the types of ejector pin?
- 6 How vacuum is created in ejector?
- 7 How does an ejector work in a process?
- 8 What should the pressure of water be in an ejector?
What are the primary parts of an ejector?
Ejector has no moving part and uses the potential of a high pressure flow to suck and compress a low pressure flow. Figure 1 presents the main parts of an ejector including primary nozzle, secondary inlet, suction and mixing chambers, secondary throat, and exit diffuser.
What is the function of ejector?
The purpose of the ejector is to transport and compress a weight of induced fluid from the suction pressure to the exit pressure. By staging ejectors it is possible to obtain a very large range of suction pressures from atmospheric down to as low as one micron of mercury absolute.
What are the types of ejector?
Ejectors are generally categorized into one of four basic types: single-stage, multi-stage non-condensing, multi-stage condensing and multi-stage with both condensing and non-condensing stages. Single-stage ejectors are the simplest and most commonly used construction.
What is ejector system?
Ejectors, are devices for the conveyance, compression or mixing of gases, vapors, liquids or solids in which a gaseous or liquid medium serves as the motive force. They are “pumps without moving parts”.
What is difference between ejector and eductor?
1. The eductors are used to remove the air 4 times the volume of the vessel per hour for the vessel entry jobs. whereas the ejectors just suck the excess volume of the system and maintains the system pressure accurately. The difference is with respect to their function and not with respect with their motive fluid.
How does a vacuum ejector work?
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. The fluid leaving the jet is flowing at a high velocity which due to Bernoulli’s principle results in it having low pressure, thus generating a vacuum.
Why ejector is used in turbine?
The main function of the ejector is to maintain the vacuum value in the condensation system of the turbine. According to this, main indicators of the efficiency, which influence the vacuum value in the condenser (pressure of the I stage and the length of the performance curve) are also connected with the reliability.
What is the material of ejector pin?
Ejector Pins Specifications: Material: Stainless Steel. Size: Customized. Tolerance: +/-0.002mm.
What are the types of ejector pin?
In the market, there are three common types of ejector pins: (1) through hard pins, (2) nitride H13 pins and (3) the newly developed black ejector pins. All of these pins are excellent to use; however, each has its own characteristics and is designed to be used in a specific environment.
How vacuum is created in ejector?
Why vacuum is created in condenser?
In other words, the specific volume of water at a given pressure is many times lower than that of steam. A vacuum is maintained in the condenser so that steam can easily flow and more work can be extracted from the steam in the turbine; this is the reason why vacuum is maintained in condensers.
How big is a water ejector jet eductor?
Water ejectors and water jet eductors are also used for mixing liquids, lifting liquids, and pumping and mixing suspended solids and slurries. Sizes range from 1 2 inch to 24 inches.
How does an ejector work in a process?
Ejectors have no moving parts and operate by the action of one high pressure stream entraining air and other vapors (or liquids) at a lower pressure into the moving stream and thereby removing them from the process system at an intermediate pressure.
What should the pressure of water be in an ejector?
Ejectors using water as the motive fluid are designed for reasonable non-condensable loads together with large condensable flows. Water pressures as low as 10–20 psig are usable, while pressures of 40 psig and higher will maintain a vacuum of 1–4 inches of Hg absolute in a single stage unit [1 ].
How are intercondensers used in the ejector stage?
Intercondensers are used to condense the steam from a preceding ejector stage, thus reducing the inlet quantity of vapor mixture to the following stage. This is a means of increasing steam economy. Aftercondensers operate at atmospheric pressure.