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Driving Expander Technology
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Driving Expander Technology - 1

Driving Expander Technology Atlas Copco Gas and Process

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Table of Contents Overview Driving Expander Technology 4 Your Application Air Separation 6 Energy Recovery / Pressure Letdown 8 Energy Recovery / Heat 10 Chemical / Petrochemical 12 Oxidation Processes and Hot Gas Applications 14 Technical Features Achieving Full Control Over Your Process 16 Choose the Best Seals for Your Process 19 Configuration Options: Choosing the Right Match 20 Your Application An Inside Look at Processes 22 Products and Applications at a Glance References 24 Expander Matrix Our Products for Your Market 28

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4 Overview Atlas Copco Gas and Process is continuously working to extend the function and performance of global turboexpander technology. As one of the market leaders for this technology, we see it as our obligation to help customers achieve superior productivity in their processes. And to achieve this goal, we foster innovation and engage in a close dialogue with our customers. Working hand-in-hand with you, we always strive to find a better way of doing things. In all modesty, with thousands of our machines in operation worldwide, we do know what we are talking about. Expanders by Gas and...

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5 At a Glance: As a global market leader for expander technology Atlas Copco Gas and Process boosts your process productivity. Here’s an overview of our expander technology: • With our technology, we serve the markets air separation, energy recovery, chemical / petrochemical, among others. • Offered in various configurations, meeting numerous and very specific needs • Developed and advanced by the world’s number-one company for integral-gear technology • Dedicated to boosting your productivity • Thousands of references worldwide Building Productive Partnerships When you choose Atlas Copco...

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6 Your Application – Air Separation ”Atlas Copco was the first expander manufacturer that successfully employed dry gas seals for cryogenic applications.” Your Application – Air Separation Our solutions for the air separation market are designed with increased customer benefit in mind. Compact and highly efficient designs provide our customers with advantages in their process operations. Our expander design is simplified and provides very smooth air inlet and outlet. Furthermore, we provide optimum insulation: Innovative insulation is employed at the expander casing and various other...

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8 Your Application – Energy Recovery / Pressure Letdown ”With Atlas Copco, you select the expander manufacturer with the most experience in integrally-geared turbomachinery.” Your Application – Energy Recovery / Pressure Letdown Virtually any process using high-temperature or high-pressure gas may be a resource for energy recovery. Within that realm, pressure letdown is a key application: Atlas Copco Gas and Process turboexpanders for pressure letdown can help generate electrical power and increase the overall efficiency of your plant. We can help you identify the energy recovery potential...

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10 Your Application – Energy Recovery / Heat Your Application – Energy Recovery / Heat “When you choose Atlas Copco Gas and Process, rest assured that you’re choosing the highestefficiency expanders in the market.” Atlas Copco Gas and Process has also been strengthening its foothold in other application areas, starting with Heat Recovery. This is another energy source that can be converted to useful energy by employing our turbo- expanders in Organic Rankine Cycles (ORC), Kalina Cycles, or other Binary Cycles. Potential heat sources to drive this application include tail gas from industrial...

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12 Your Application – Chemical / Petrochemical Your Application – Chemical / Petrochemical ETG 125/150 MS Fewer markets are as broad and complex as chemical / petrochemical. It features a broad range of applications – all covered by Atlas Copco Gas and Process turboexpanders. Our key areas of expertise are CO applications as well as hydrogen recovery applications. We supply the entire ET series of turboexpanders for this market. Our turboexpanders for C/PC feature very high API levels; they typically are equipped with dry gas seals, a premier leakage-minimizing solution. They are the seals...

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14 Your Application – Oxidation Processes and Hot Gas Applications Your Application – Oxidation Processes and Hot Gas Applications Two-stage ETG 360 NS-2 “Use of an expander in this application leads to several benefits, including energy recovery and enhanced environmental safety.” In an oxidation process oxygen is generally extracted from compressed air. This is done through a catalytic exothermic reaction. At the conclusion of this process, a hot and sour nitrogen gas remains – at higher pressure and temperature. The pressure and temperature of this tail gas can be reduced by expansion....

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16 To compensate for the varying operating conditions found in many processes, turboexpanders must be capable of efficient off-design performance. Atlas Copco Gas and Process turboexpanders use adjustable inlet nozzles engineered to produce optimum flow patterns, and to provide precise, continuous control between 10% and 150% of design flow. The nozzles can be controlled manually or by using automatic actuators. Actuators can also receive control signals from process-related local or remote instruments. The nozzles are designed to open wide for full flow and close for emergency conditions....

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The typically flat turboexpander efficiency characteristic with various flow rates is illustrated here. Efficiency vs. the velocity ratio v (ratio tip speed to spouting velocity) is also shown. Expander impeller ”With Atlas Copco Gas and Process you select the Expander Manufacturer with the most experience in compressor impellers.” Matching Your Needs Wheels for Atlas Copco turboexpanders are milled to computer-generated profiles. In order to verify mechanical integrity, all wheels are dynamically balanced and dye-penetrant inspected before and after over-speed testing. Open or closed wheel...

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