Water Technologies. Dystor Gas Holder - The Premier Solution

Transcription

1 Water Technologies Dystor Gas Holder - The Premier Solution

2 Operational Flexibility Because the Dystor system can provide more gas and sludge storage than conventional gas holders, you have more flexibility in running your plant on a daily or seasonal basis. With conventional gas holder covers, cover travel is limited due to the corbel location required to accommodate piping penetrations and supports. Maximum benefits Maximum gas storage More sludge storage Digitally controlled Automatic operation True odor containment Reduced maintenance Very economical Environmentally stable Manufacturer installed The operator interface is a user-friendly tool that allows system status to be immediately determined at a glance. The PLC can interact with the existing SCADA systems and is capable of interacting with other digestion equipment, including co-generation systems.

3 Dual Membranes control the process The Dystor Gas Holder system from Siemens Water Technologies is a unique gas holder design that's more economical to install than steel gas holders and more versatile and more stable than floating covers. Ideal for both primary and secondary digesters, its dome-shaped, engineered membrane system maximizes storage of methane gas and sludge, while also containing odors. Plus, a manufacturer installed system means single-source responsibility. This system includes two durable membranes. The outer air membrane remains inflated in a fixed position and is cable restrained to ensure system integrity and allow operating pressures up to 16 w.c. An inner gas membrane moves freely as it stores or releases gas generated from the anaerobic digestion process. An air handling system maintains a preset operating pressure between the two membranes. A fan supplies air to the air chamber when methane gas is withdrawn and a pressure air control valve vents air to accommodate increasing gas volumes. By automatically equalizing the pressure, this system keeps the outer membrane inflated, while exerting a constant pressure on the stored gas. Ideal for retrofitting your existing plant, the operating pressure can be set to fit into the existing equipment eliminating the need for re-ballasting the rest of the digestion system. In addition, the membranes are sealed tight to the digestion tank wall, preventing odors from escaping. Purge Line Air Supply Restraint Cable Sludge Figure 1

4 A configuration for every application Free-membrane cover Designed for secondary digesters or anaerobic sludge storage tanks, the free-membrane cover (Fig. 1) provides the greatest volume of air chamber displacement for gas storage and sludge variation. High Gas Take-Off (HGTO) Style In primary or secondary digesters where piping or other equipment could interfere with the travel of the inner membrane, we offer the High Gas Take-Off style (Fig. 2). Specifically designed for active primary digesters which have the potential for foaming, the high location of the gas take-off in this configuration keeps the foam from reaching the gas piping. Separate Storage Gas Holder Employed when only gas storage is desired, a separate gas holder can be mounted directly on a concrete foundation ring (Fig. 3). It is substantially less costly than a high-pressure gas storage sphere and does not require the use of high-maintenance gas compressors. Where a high-pressure sphere exists, it can be used as a low-pressure displacement gas holder between the digestion tanks and the high-pressure sphere. Cubic Feet $60 $50 $40 $30 $20 $10 0 Cubic Feet of Gas Storage vs Diameter Diameter (ft) Cost of Gas Storage Spiral Guided Gas Holder Diameter (ft) Free Membrane Dystor Gas Holder Spiral Guided Gas Holder Free Membrane Dystor Gas Holder Up to six times more gas storage capacity than other options. Lower installed cost per cubic foot of gas storage. Air Membrane Purge Line Air Supply Air Chamber Restraint Cable Gas Membrane Gas Take-Off Sludge Figure 2

5 Economic Advantages Proven in more than 85 installations, the Dystor gas holder has a number of economic advantages over conventional steel or fiberglass gas holders and floating covers. Its installed cost is significantly less. The Dystor system holds up to six times as much gas as conventional covers maximizing the available energy benefits of the anaerobic digestion process. Dystor covers allow the sludge level to be varied throughout the entire tank depth, providing usable storage that is several times greater than the storage available with conventional gas holder covers and offering greater operational flexibility. With this membrane system ongoing maintenance such as painting, roller and guide replacement are eliminated and no re-ballasting is required. With high energy prices, ROI is significantly lower than with steel covers. The Dystor air control system is compact and simple to operate while offering the most advanced technology and safety features. INLET AIR FILTER PVR VALVE GAS PRESSURE TRANSMITTER AIR PRESSURE CONTROL VALVE AIR FANS AIR PRESSURE TRANSMITTER Air Control System METHANE DETECTOR SOLENOID VALVE GAS TAKE-OFF PURGE VALVE AIR PURGE AIR EXHAUST SCREEN Gas Take-Off Air Membrane Air Chamber Air Supply Purge Line Restraining Cable Air Membrane Gas Membrane Gas Membrane Cable Catcher Gas Take-Off Figure 3 Floor Membrane Sand Grade

6 For further information please contact: Siemens Water Technologies 1901 South Prairie Avenue Waukesha, WI Tel: or Fax: Website: The information provided in this brochure contains merely general descriptions or characteristics of performance which in actual case of use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. Dystor is a trademark of Siemens, its subsidiaries or affiliates Siemens Water Technologies Corp. Printed in the U.S.A. E1001-WTBC-A19-V1-4A00 BC-Dystor-BR-1106 Subject to change without prior notice.