Xebec Desiccant Air Dryer

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Text of Xebec Desiccant Air Dryer

ADX SOLUTIONSVacuum Heat Regen Desiccant Air DryerConfidential

SCOPE Xebec Overview & Introduction Fundamentals of Desiccant Air Drying Technology

Vacuum Heat Regen (Zero Purge) Desiccant Air Dryer Maintenance of Vacuum Heat Regen Desiccant DryerNote : The information in this presentation is confidential & is meant for M+W & Medtronic Singapore internal use only, & must not be given to any 3rd party company without the written permission from Xebec Adsorption South East Asia Pte Ltd.

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Company Overview

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Company Overview

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Company Overview

Xebec South East Asia Facility

(Top left): Company Service Vans (Above): Singapore Sales Office with area over 4500 sq ft (Bottom left): Xebec Dryer

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Company Overview

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Company Overview

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Company Overview

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Company Overview

Fundamentals of Desiccant Air Drying Technology

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WHY TREAT COMPRESSED AIRA compressor takes in atmospheric air that is loaded with moisture, dirt, dust fibers and bacteria. Due to constant use, wear & tear, most compressors deliver large amounts of oil fumes along with compressed air. The hot air delivered by a compressor carries contaminants which cause corrosion, excessive wear, malfunction and ultimately failure of your compressed air components, tools and system. To assure a reliable and efficient operation of a plant, these contaminants must be removed.190M particles/m3

AIR COMPRESSOR

RUST

TO COMPRESSED AIR SYSTEM

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Fundamentalson purification of compressed airThe air loaded with moisture,particles and oil is purified by means of filtration and drying. filtered

are: Solid particles & coalescing components are : all vapour phase componentsConfidential

dried

FundamentalsWater vapour content g/m

on water separation and drying58.3

filtration17.5 4.50 0.76 0.10condensation adsorption

-40 -20 0 20 40 Dew point CConfidential

Fundamentalsstructure of the desiccantn Adsorbents

with fine pores inner surface area up to 1000 m /gn Adsorbents types

- Molecular sieve - silica gel - activated aluminaConfidential

FundamentalsRegeneration - HeatlessLoading time after each load situation tB = 3 - 5 min. Adsorption of moisture on external desiccant surface.

Regeneration without heat supply instead with a partial flow (typically 15%) of already dried and expanded compressed air in the counter current direction.Confidential

FundamentalsRegeneration - HeatedLoading time after each load set-up tB = 4 - 8 h. Adsorption of moisture on external surfaces and internal pores of desiccant beads. Regeneration with externally heated air in order to evaporate the moisture that is accumulated deep in the pores. The regeneration medium carrys the moisture out from the desiccant & is exhausted out of the plant room.Confidential

FundamentalsAdsorption - Desorptionn Adsorption drying requires two vessels, filled with an adsorbent (drying agent) n Adsorption and desorption take place simultaneously at the same timeConfidential

Adsorption

Desorption

Vacuum Heat Regeneration (Zero Purge) Desiccant Air Dryer

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Energy Costs on the Rise Again11July08 @ US$147

Current US$72

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Electricity Tariff on the Rise Again

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Vacuum Heat Regen (Zero Purge) Dryer Can Help Companies to Save Energy! Does not use valuablecompressed air for regeneration of desiccant Ambient air is used for both the heat regeneration cycle & cooling cycle Autodew control for Dewpoint Dependent Switching (DDS) to maximize energy savings

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Characteristics of Xebec Vacuum Heat Regen Dryer SS desiccant bed support for effective air flow distribution External heater (low watt density type for long life span) Reliable vacuum pump of continuous duty type Intensive closed loop cooling option (Zero Purge) for countries with high humidity) Siemens PLC control monitors all critical operating conditions

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Heat Regen Cycle (Right Chamber)CDA out

Wet Air in

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Cooling Cycle (Right Chamber)

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Re-Pressurization (Right Chamber)

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Heat Regen Cycle (Left Chamber)

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Cooling Cycle (Left Chamber)

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Re-Pressurization (Left Chamber)

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Adsorption / Desorption InformationAfter the heating and before switch over from desorption to adsorption,the desiccant bed must be cooled to approx. 60C, to avoid a heat and pressure dewpoint spike.

200 Temperature C 100 150Desorption Range (160 to 200C)

Transition range (70 to 80C)

50Adsorption Range (20 to 60C)

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Major Component Switching Valves

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Switching Valves

High performance butterfly valve

For 2 and larger valves requirement Inlet and Regen Exhaust Valves

Double or Single acting rack & pinion actuator for long life & precise operation Full face sealing mechanism

for long life

Features SS Disc

Carbon Steel Body

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Major Component External Heater

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External Electric Heater

Flanged immersion heaterInsulated heater housing Temp dependent Regeneration cyclesAdequate regeneration is confirmed by actual regen air outlet temperature, not simply by a timer

Low watt density type (for long life span) Incoloy* sheath element

* Alloy which combines good strength with excellent resistance to oxidation & carbonization under high temperature conditions

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Vacuum Pump

Quiet operation Totally enclosed fan cooled housing Sized for required regen vacuum pressure and maximum required regen flow rate Brands of Vacuum Pump may varies

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User Interface/Text DisplayOPERATOR INTERFACE

F1 F2 F3 F4

=> => => =>

DRYER STATUS MANUAL STEP AHEAD (MANUAL MODE ONLY) DRYER ALARM STATUS ALARM RESET

SHIFT=> In order to choose one of the next four options, the SHIFT button must be pressed first. An s in the lower right corner indicates the upper row is now active. F5 F6 F7 F8 => => => => DRYER OPERATING MODE MENU HEATER SHEATH TEMPERATURE AND SETPOINT HEATER OUTLET TEMPERATURE AND SETPOINTS REGEN. OUTLET TEMPERATURE AND SETPOINTS ARROWS ALLOW USER TO SCROLL UP OR DOWN INSIDE OF DISPLAY. A FLASHING ARROW ON THE RIGHT SIDE OF THE SCREEN INDICATE THAT MORE INFORMATION IS AVAILABLE IN THE DIRECTION OF THE ARROW AND CAN BE ACCESSED BY USING THE SCROLL ARROWS. ESC => ACCESSES THE MENU MODE. ENTER=> TO CONFIRM THE COMMAND.

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Maintenance of Vacuum Heat Regeneration Adsorption Dryer

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Daily MaintenanceVisual Check Unusual noises Check for any alarm Check dewpoint Check inlet pressure & temperature Check that filter condensate drain is working Check drain pipe for blockage

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Weekly MaintenanceVisual Check Check Filters differential pressure indicator. If inregion of 8~10 psi indicates that element is dirty & should be replaced Inspect inlet suction filter & clean or replace if clogged, dirty or damaged

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Monthly Maintenance Check silencers/mufflers on dryer andreplace if clogged or dirty Check dryer operation cycle for proper operation of butterfly valves & solenoid valves. Check if heater outlet temp is between 350 degF & 450 degF (Press Shift F7)

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Annual Maintenance Replace the suction inlet filter Replace elements of Pre, After-filters & Final air filter at least once a year Disassemble, clean & inspect all check valves (if possible) Calibration of Autodew sensor

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Thank you for your attention. Any Questions ?

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