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DESICCANT AIR DRYERS - AIR DRYERS AVAILABLE EQUIPMENT Available Equipment Heatless Heated Purge...

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  • DES ICCANT AIR DRYERS

    AVAILABLE EQUIPMENT

    www.QuincyCompressor.com

    Available Equipment Heatless Heated Purge Blower PurgeQDTH QDHP QDBP

    701 North Dobson AvenueBay Minette, AL 36507Phone 251.937.5900Fax 251.937.7182

    Nearest Distributor:888.424.7729

    Email:[email protected]

    Sequence Annunciator Standard Standard OptionalInformation Center Standard Standard Not ApplicableQ-Sorb Enhanced Desiccant Standard Standard StandardMicro Processor Standard Standard StandardDemand Control Optional Optional OptionalMicroBurst Regeneration System Optional Optional Not ApplicableDigital Dewpoint Readout Optional Optional OptionalAdjustable Dewpoint Optional Optional OptionalCommunications Port Optional Optional Optional*Dry Contacts for Remote Alarm Optional Optional OptionalNEMA 4 Standard Standard StandardNEMA 7-9 Optional Optional OptionalcUL 508 Optional Optional OptionalStainless-Steel Diffuser Screens Standard Standard StandardPressure Equalization Standard Standard StandardExhaust Mufflers Standard Standard StandardPressure Gauges Standard Standard StandardASME Vessels Standard Standard StandardControl Air Filter Standard Standard StandardDiaphragm Switching Valves Standard Standard Not ApplicablePremium Butterfly or Ball Switching Valves Optional Optional StandardPurge Flow Meter Optional Optional OptionalManual Cycle Test Mode Standard Standard StandardMoisture Indicator Optional Optional OptionalFactory Packages Optional Optional OptionalControl Transformer Standard Not Applicable Not ApplicablePower Failure Program Protection Standard Standard StandardLow Watt Density Heaters Not Applicable Standard StandardHeater Thermostat Not Applicable Standard StandardHigh Humidity Alarm Optional Optional OptionalFailure to Switch Alarms Optional Optional OptionalHeater Failure Alarm Not Applicable Optional OptionalLow Dewpoint Control Optional Optional OptionalHeavy-Duty Paint Optional Optional OptionalCertified Drawings Optional Optional OptionalStainless-Steel Control Tubing Optional Optional Optional

    *(Included with optional alarms)

    2004 Quincy Compressor an EnPro Industries company All rights reserved. Litho in U.S.A. (QD-002 06/04)

    HEATLESS

    HEATED PURGE

    BLOWER PURGE

    The Science of Compressed Air

    The Science of Compressed Air

  • FLOW SCHEMATICS

    To regenerate the off-line tower, low pressure,dry purge flows through the regenerating bed.Moisture that had adhered to the surface of thedesiccant during the on-line cycle is attracted tothe air. The moisture is desorbed by the air andcarried out of the tower. Each tower has anexhaust valve where the wet air is dischargedinto the atmosphere.

    Quincy desiccant dryers are designed formaximum performance. Moisture load, velocity,contact time and cycle time determine theamount of desiccant required and the size of thevessels. Bed fluidization, or destruction of thedesiccant caused by rapid and inconsistent airflow, is prevented by keeping air flow velocitiesbelow 50 feet per minute. This means air is incontact with the desiccant for at least 4.5 seconds,which balances drying and pressure drop.

    QDTH Heatless-40F to -100F Dewpoint

    First Cost: LowOperating Cost: Medium to HighMaintenance: LowPurge: 15%

    QDHP Heated Purge-40F to -100F Dewpoint

    First Cost: MediumOperating Cost: LowMaintenance: LowPurge: 3.5% to 7%

    QDBP Blower Purge+10F to -40F Dewpoint

    First Cost: HighOperating Cost: LowMaintenance: MediumPurge: 1.75 Avg.

    The Science of Compressed Air

    DES ICCANT AIR DRYERS

    QDTHHEATLESS, QDHPHEATED PURGE, QDBPBLOWER PURGE

    -40F to -100F Pressure Dewpoint Enhanced Q-Sorb Desiccant

    - Longer Life

    - Lower Pressure Drop

    - Less Dusting Sequence Annunciator NEMA 4 Standard Microprocessor Control Demand Control Option MicroBurst Regeneration System

    (QDHP Heated Purge Only) Extended Warranty Option

    Quincy desiccant air dryers purify compressedair by adsorbing water vapor. Pressure dewpointsof -40F to -100F are attained by directingthe flow of wet compressed air through a bed ofhighly adsorbent desiccant.

    Quincy desiccant dryers are supplied with Q-Sorb, an enhanced formula of activatedalumina. This high performance desiccantprovides better uniformity, more efficient useof available surface area, less dusting, longerlife and lower pressure drop. It is availableonly from Quincy and Quincy associates.

    The Q-Sorb desiccant is contained in twopressure vessels, commonly referred to asdual or twin towers.

    As the compressed air passes through theon-line, or drying vessel, the trapped moistureadheres to the surface of the desiccant material.The dry compressed air then exits the vessel andis directed to the afterfilter for final polishing.The dry air then enters the compressed airdistribution system.

    An Electronic Control Processor (ECP) switchesthe air flow from tower to tower. While onetower is on-line and drying, the other toweris off-line, regenerating the wet desiccant.Regeneration, also referred to as purging, usesair to strip away the moisture collected on thedesiccant while the tower was on-line.

    Heatless dryers use a small portion of the driedcompressed air to purge the off-line tower.Heated Purge dryers, also referred to as ExternallyHeated, use an even smaller portion of the driedcompressed air that is heated for regeneration.Blower Purge dryers combine heat with forcedambient air for regeneration.

    PAGES 2-3

    www.QuincyCompressor.com

    OPERATION & DESIGN

  • OMNIPOINT DIGITAL DEMAND CONTROL

    Quincys OmniPoint Digital Demand Controloption significantly reduces energy consumptionby automatically regulating purge in response toactual moisture load. Inlet temperature, pressureflow, and relative humidity determine moistureload. These conditions change throughout theday and almost never combine in a manner thatwould produce maximum moisture loads. Forexample, a dryer operating 20F cooler than designpoint would have to deal with only 50% of itsdesign moisture loading. Normal dryer controlsfix the cycle for worst case moisture loading.Because loads and conditions fluctuate throughoutthe day, fixed cycle operation wastes energy byregeneration more often than is necessary.

    Quincys OmniPoint Digital Demand Controldelays regeneration until the total design saturation point is achieved. A sensor samplesmoisture load and signals the controller to adjustthe purge cycle. The sensor is protected fromnormal wear and tear by a rugged stainless-steelenclosure and sintered metal guard. Calibrationdata is stored directly in the sensors memory.

    The instrument automatically compensates forfluctuating ambient temperatures. Dry contactsfor remote monitoring of high humidity andfailure to switch alarms are included. A scaled4 to 20mA linear output is also provided asstandard equipment. Additional dry contactsand RS232 or RS485 communications port areavailable. The entire OmniPoint system is certifiable and traceable to the National Instituteof Standards and Technology. OmniPoint DigitalDemand Control can provide annual energy savings as high as $6,700 on 1000 cfm heatedpurge dryers and up to $10,000 on 1000 cfmheatless dryers. OmniPoint Digital DemandControl reduces cycling frequency, resulting inlonger desiccant life, longer valve life and lessoverall maintenance. The panel mounted dewpointdisplay provides an up-to-the-minute performancereadout and the adjustable dewpoint control can save additional energy by allowing for higher dewpoint settings.

    Saves Energy Digital Dewpoint Readout Adjustable Dewpoint Dry Contacts Optional RS 232 or RS 485

    Communication Port NIST Traceable High Speed Ceramic Sensor

    OMNIPOINT DIGITAL DEMAND CONTROL

    Effect of Flow on Moisture Load% load

    0 25 50 75 100

    100

    75

    50

    25

    % p

    ower

    Dewpoint

    Probe

    The Science of Compressed Air

    DES ICCANT AIR DRYERS

    ELECTRONIC CONTROL PROCESSOR

    Information Center Visual Display Manual Test Mode -40F to -100F Dewpoint Protected Program

    All dryer functions are managed by QuincysElectronic Control Processor. On Heatlessdryers the controller can be set for a standard10-minute cycle to deliver a -40F dewpoint,or a 5-minute Short Cycle that will providedewpoints from -80F to -100F.

    Heated Purge dryers are programmed for an8-hour operating cycle. A manual test mode isprovided to allow the operator to quickly stepthe dryer through a complete cycle. The LCDInformation Center displays tower sequence,timing cycle, function alarms, and optionalequipment operation. The integral LEDSequence Annunciator visually indicateswhich tower is on-line drying, and whetherthe off-line regenerating tower is purging,heating, repressurizing or cooling. Theinformation center also displays the functionof the optional demand control and failure toshift, high humidity and low pressure alarms.

    Blower Purge dryers are programmed for an8-hour operating cycle. Dryer operation andall control functions are managed by an onboard PLC programmed for optimum dryerperformance. Optional Sequence Annunciatorlights are available.

    PAGES 4-5

    www.QuincyCompressor.com

    Effect of Temperature on Moisture Load

    Inlet Temp F 100 95 90 85 80 75 70

    Factor 1.0 .87 .75 .65 .55 .47 .40

    ELECTRONIC CONTROL PROCESSOR

  • DES ICCANT AIR DRYERS

    MICROBURST REGENERATION FULL LOAD ENERGY SAVER Q-SORB ENHANCED DESICCANT

    Average Purge 3.5% 50% Energy Savings Fast Payback PLC Control Full Purge Default Mode Digital Dewpoint Readout Hour Meters

    The Quincy MicroBurst Regeneration (MBR) system is the only Full Load Energy Saver availablefor use with Heated Purge desiccant air dryers.

    The Quincy MBR cuts purge requirements inhalf and significantly reduces h

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