Especially the chemical industry makes largely use of steam jet ejectors to generate the vacuum required in many distillation processes. The new standard now integrates the previous three separate standards on steam jet ejectors. Steam jet ejectors, the largest vacuum producing devices available are used in the most demanding of applications. Engineered by utilizing the finest quality components and raw material, these ensure trouble free operation and are resistant to corrosion and abrasion. Steam jet ejectors the largest vacuum producing devices available are used in the most demanding of applications. Using them reduces the energy consumption of the process and cuts the machinerys operational costs sustainably. With this contact, the steam imparts velocity energy to the process and is decelerated. Steam jet ejectors for the process industries mcgrawhill chemical.
Steam jet ejectors for the process industries robert b. A complete guide to getting the best from steam jet ejectors. Used extensively throughout the process industries, steam ejector vacuum systems offer a reliable and economical means of handling high volumes of gas and vapor streams at low pressures. Some of these involve distillation,filtration, drying, degassing,deodourizing, deaeration, crystallization and many others. Steam jet ejectors were for many years the workhorse of the chemical process industries for producing vacuum. Keeping the variegated requirements of our clients, we are offering these steam jet ejectors in various specifications and material of construction such as. A steam injector is typically used to deliver cold water to a boiler against its own pressure, using its own live or exhaust steam, replacing any mechanical pump. Steam jet vacuum ejectors remove gases andor vapours from process operations thereby generating a vacuum in the reactor. The primary advantages of steam jet ejector are simplicity of operation, no mechanical drive and has no moving parts.
The first step of the design and optimization process of the steam jet ejector. Ejectors single stage and multistage steam jet ejectors. H k industries is a leading manufacturer of multistage steam ejector systems in the country. Vacuum pumps market growth, trends, and forecast 2020. Ejector design software to do conceptual design and generate ejector sizes. The steamjet ejector is a device designed to convert the pressure energy of a motivating fluid to velocity energy in order to entrain the suction fluid and then recompress the mixed.
Since pilot plant work is on a small scale, the types of steam jet ejectors that are used are not. Request pdf evaluation of steam jet ejectors steam jet ejectors are an. Ejector design software ejector sizing calculation. Using a minimum of engineering jargon, it explains how to install different ejectors, how to operate them, and how to test and maintain them. Nash has been designing, manufacturing and troubleshooting steam jet air ejector systems since 1986. As they have no moving parts, ejectors can provide many years of troublefree operation. Very often, the motive fluid is steam and the device is called a steam jet ejector. Click below to download the product brochures in pdf format. Steam jet compressors are part of many process engineering applications. An ejector is a device used to suck the gas or vapour from the desired vessel or system.
Steam jet ejectors, mechanical vacuum pumps, hybrid systems. Steam jet ejector manufacturer,steam jet ejector supplier. The application of steam vacuum ejectors is an optimal solution in industrial thermal. The steam ejector is a simple device consisting of three basic components, a motive steam nozzle, a suction chamber and a mixing diffuser. They usually save as much as 10% to 20% in motive steam, compared with singlenozzle units designed for the same conditions.
Can operate safely under the most hazardous conditions. Please provide us with some information about your vacuum application needs and we will provide you with a free quote to meet your specific requirements. The motive steam enters the ejector through the motive fluid nozzle and is expanded into the mixing diffuser converting pressure energy into velocity energy. Ejectors and steam jet ejectors document library graham. The steam entrains the suction gases and the mixture. Thermocompressors use highpressure stream to entrain a lowpressure stream. The primary advantage of installing ejectors versus mechanical pumps is the ejectors simplicity of operation, low first cost and ability in handling wet. Steam is used for creating vacuum in steam jet ejectors according to the needed pressure.
Basic ejector components are the steam chest, nozzle, suction, throat, diffuser and they discharge fig. Steam jet ejector is a device for producing vacuum which is achieved by using a high pressure motive steam. Steam ejectors are virtually maintenance free and can be constructed from a wide variety of steel, alloy and composite materials to include pp, ptfe and pvdf. Get your kindle here, or download a free kindle reading app. These can also be fixed with mechanical boosters and vacuum pumps in order to create higher vacuum. Ejector systems ejectors gea engineering for a better world.
In this study, semiempirical models are developed for design and rating of steam jet. Manufacturer of ejectors single stage and multistage steam jet ejectors, five stage and six stage steam jet ejectors with condensor, two stage ejector with condenser and four stage ejector with condenser offered by newfield industrial equipment private limited, vadodara, gujarat. The unit is available in standard sizes up to 6 and custom fabricated for larger sizes. Vacuum products steam jet ejectors by graham corporation. Need to upgrade your current process vacuum system or help to design a new steam jet ejector system.
Ejectors are virtually maintenance free and can be constructed from a wide. Download pdf process vacuum system design and operation. Buy steam jet ejectors for the process industries mcgraw hill chemical engineering book online at best prices in india on. Steam ejector training video used extensively throughout the process industries, steam ejector vacuum systems offer a. We also lead the industry in the duplication of parts and assemblies for. The ejectors, sometimes called eductors, along with any vacuum pump in the process, create the low pressure vacuum at the inlet of the first ejector. Combining low capital cost, simple operation, high reliability and the ability to handle large volumes at very high vacuum levels, they can be optimized to. The ejector design principles used in the ejector calculations for the program are explained including the ejector energy balance and effects of the ejector flow cones free demo programs for a short time are offered to let you see how the ejector program works they are not. This first case has momentum addition from the sidepipe into the main stream check the pipe sizes. Evaluation of steam jet ejectors linkedin slideshare.
The third article, suggesting how to get the most from ejectors, gives tips on troubleshooting and choosing materials of construction. These steam jet ejectors are very sturdy and durable which provide convenient and trouble free operation for prolonged use. When first developed, its operation was intriguing because it seemed paradoxical, almost like perpetual motion, but it was later explained using thermodynamics. The attached article has a equation english units as given in the standards for steam jet vacuum systems published by heat exchange institute hei. Performance optimization of steam jet ejector using cfd. Steam jet compressors, jet pump, thermocompressor, ejector. Steam jet ejectors are the simplest and most reliable form of vacuum. They are widely used to generate vacuums with capacity ranges from very small to enormous. The motive fluid for these type of water jet ejectors is water instead of steam. Also known as thermocompressors or vapour compressors, steam jet compressors compress steam flows in various processes in a simple way. Ejector products steam jet ejectors unique systems inc.
Our steam jet ejectors are able to process high vacuum levels, low pressure and low molecular gases. Ejector systems are available in unlimited range of capacities and can. Shine a small light through the diffuse to make sure it is completely free from scale and is not pitted, grooved, or cut. A practical guide to steam jet ejector technology for engineers and technicians, providing the latest methods for achieving maximum performance in any of the process industries. Buy steam jet ejectors for the process industries mcgraw. The major difference between the ejector and the vacuum pump or compressor is it had no moving parts. Ejectors will handle highly corrosive vapours and fluids. Chemical engineering and processing 41 2002 551561 evaluation of steam jet ejectors hisham eldessouky, hisham ettouney, imad alatiqi, ghada alnuwaibit department of chemical engineering, college of engineering and petroleum, kuwait uni6ersity, p. Table 2 gives an overview of some advantages and disadvantages of steam jet ejectors.
The suction flow is compressed to a higher pressure. Steam ejectors provide vacuum in many process industries and utility companies. Steam jet ejectors for the process industries by robert b. Virtually maintenance free with no moving parts, they can be fabricated from almost any material, and can be used in every industry that requires vacuum. If you can then use the typical steam jet ejector, the second article tells points to consider when you figure what an ejector will cost. Normal range for a water jet ejector is from atmosphere to 45 mm hg abs depending upon the water temperature. Our ejectors are used in large variety of applications. Virtually maintenance free with no moving parts, they can be fabricated from. In a spindleoperated ejector, the nozzle and tapered spindle work together similar to a needle valve. With increasing emphasis on stricter pollution control, their use was curtailed. Steam jet ejectors for the process industries 2005. Jet ejectors are popular in the chemical process industries because of their simplicity and high reliability.
Steam jet ejectors for the process industries mcgrawhill chemical engineering robert b. The fluids can be steam, air, propane or any other vapor phase material. Selecting and optimizing steam jet ejectors and condensers for any vacuum level required for the process industries designing steam jet vacuum systems open file 220. Other types of injector may use other pressurised motive fluids such as air. The ejectors form an integral part of distillation columns, condensers and other heat exchange processes. H k industries manufacturer of steam jet ejector systems. The two stream mix and discharge to an intermediate pressure. Ejector working principle mechanical engineering site. The basic principle of jet pumps consists in the liquid or gas jet being emitted by a nozzle at high speed entraining and accelerating the surrounding liquid, gas or solid matter. An ejector is similar to an of vacuum pump or compressor. A head of 34 feet of water less at higher altitudes can be used to remove the condensed steam from the system. Due to their simplicity, constantpressure jet ejectors that.
Steam jet vacuum systems combine ejectors, condensers and interconnecting piping to provide relatively lowcost and lowmaintenance vacuum pumping. Used extensively throughout the process industries, steam ejector vacuum systems. There are still many applications, however, such as those with. What is the purposefunction of steam ejector in vacuum. Steam jet ejectors for the process industries 1994. Steam jet ejectors for the process industries mcgrawhill. Hence it is relatively lowcost and easy to operate and maintenance free equipment. Our ejectors have the ability to handle large volumes at very high vacuum levels and can be optimized to contribute to process enhancements and operational efficiency. In this case, the spindle is essentially changing the dimensions of the. Steam jet ejectors, the largest vacuum producing device.
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