1、 Ozone generators NSF International Standard/ American National Standard NSF/ANSI 222 2006eNSF/ANSI 222 2006e Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-NSF International, an inde
2、pendent, not-for-profit, non-governmental organization, is dedicated to being the leading global provider of public health and safety-based risk management solutions while serving the interests of all stakeholders. This Standard is subject to revision. Contact NSF to confirm this revision is current
3、. Users of this Standard may request clarifications and interpretations, or propose revisions by contacting: Chair, Joint Committee on Treatment Units NSF International 789 North Dixboro Road, P.O. Box 130140 Ann Arbor, Michigan 48113-0140 USA Phone: (734) 769-8010 Telex: 753215 NSF INTL FAX: (734)
4、769-0109 E-mail: infonsf.org Web: http:/www.nsf.org Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-i NSF International Standard/ American National Standard for Treatment Units Ozone g
5、enerators Standard Developer NSF International Approved September 27, 2006 NSF International Designated as an ANSI Standard September 27, 2006 American National Standards Institute Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or netwo
6、rking permitted without license from IHS-,-,-ii Prepared by The NSF Joint Committee on Drinking Water Treatment Units Recommended for Adoption by The NSF Council of Public Health Consultants Adopted by NSF International May 2006 Revised September 2006 Published by NSF International PO Box 130140, An
7、n Arbor, Michigan 48113-0140, USA For ordering copies or for making inquiries with regard to this Standard, please reference the designation “NSF/ANSI 222 06e.” Copyright 2006 NSF International Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by an
8、y means, electronic or mechanical, including photocopying and microfilm, without permission in writing from NSF International. Printed in the United States of America. Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitt
9、ed without license from IHS-,-,-iii Disclaimers1NSF, in performing its functions in accordance with its objectives, does not assume or undertake to discharge any responsibility of the manufacturer or any other party. The opinions and findings of NSF represent its professional judgment. NSF shall not
10、 be responsible to anyone for the use of or reliance upon this Standard by anyone. NSF shall not incur any obligation or liability for damages, including consequential damages, arising out of or in connection with the use, interpretation of, or reliance upon this Standard. NSF Standards provide basi
11、c criteria to promote sanitation and protection of the public health. Provisions for mechanical and electrical safety have not been included in this Standard because governmental agencies or other national standards-setting organizations provide safety requirements. Participation in NSF Standards de
12、velopment activities by regulatory agency representatives (federal, local, state) shall not constitute their agencys endorsement of NSF or any of its Standards. Preference is given to the use of performance criteria measurable by examination or testing in NSF Standards development when such performa
13、nce criteria may reasonably be used in lieu of design, materials, or construction criteria. The illustrations, if provided, are intended to assist in understanding their adjacent standard requirements. However, the illustrations may not include all requirements for a specific product or unit, nor do
14、 they show the only method of fabricating such arrangements. Such partial drawings shall not be used to justify improper or incomplete design and construction. Unless otherwise referenced, the annexes are not considered an integral part of NSF Standards. The annexes are provided as general guideline
15、s to the manufacturer, regulatory agency, user, or certifying organization. 1 The information contained in this Disclaimer is not part of this American National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such, this Disclaimer may contain material t
16、hat has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the Standard. Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without
17、license from IHS-,-,-iv This page is intentionally left blank. Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-v Contents Disclaimers iii Foreword vii 1 General 1 1.1 Purpose 1 1.2 Sco
18、pe 1 1.3 Alternate material, design, and construction 1 2 Normative references. 1 3 Definitions 2 4 Materials 3 4.1 Compatible materials for operation 3 5 Design and construction . 5 5.1 Hazards 5 5.2 Electrical safety and operation. 5 5.3 Structural integrity 5 6 Ozone concentration, output rate, a
19、nd testing standard and conditions 5 6.1 Performance claims . 5 6.2 Analytical equipment / test setup: 6 6.3 General test conditions and methods 6 6.4 Ozone production test 7 7 Instructions and information. 9 7.1 Installation, operation, and maintenance instructions 9 7.2 Data plate. 10 7.3 Performa
20、nce data sheet. 10 Annex A A1 Table A1 Ozone in dry air A1 Table A2 Ozone in oxygen A1 Figure A1 . A2 Table A3 Example format 1 for Performance Data Sheet. A3 Table A4 Example format 2 for Performance Data Sheet. A3 Table A5 Example format 3 for Performance Data Sheet A4 Figure A2 A5 Figure A3 A5 Ta
21、ble A6 Example format 4 for Performance Data Sheet. A6 Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-vi This page is intentionally left blank.Copyright NSF International Provided by
22、IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-vii Foreword2The purpose of this Standard is to provide a method to evaluate ozone generator production performance (i.e., ozone concentration and output rate) and establish mi
23、nimum requirements for ozone generator materials and design and construction. This standard specifies the minimum requirements for product literature and labeling information that a manufacturer shall supply to authorized representatives and owners. This editorial revision corrects an omission in th
24、e previous version. Figure A1 was omitted from the previous edition and has been reinserted in Annex A of this edition. This Standard was developed by the NSF Joint Committee on Drinking Water Treatment Units using the consensus process described by the American National Standards Institute. Suggest
25、ions for improvement of this Standard are welcome. Comments should be sent to Chair, Joint Committee on Drinking Water Treatment Units, c/o NSF International, Standards Department, PO Box 130140, Ann Arbor, Michigan 48113-0140, USA. 2The information contained in this Foreword is not part of this Ame
26、rican National Standard (ANS) and has not been processed in accordance with ANSIs requirements for an ANS. As such, this Foreword may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the S
27、tandard. Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-viii This page is intentionally left blank.Copyright NSF International Provided by IHS under license with NSF International Not
28、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 2006 NSF NSF/ANSI 222 2006e NSF International Standard for Treatment Units Ozone Generators 1 General 1.1 Purpose The purpose of this standard is to provide a method to evaluate ozone generator production performance (
29、i.e., ozone concentration and output rate) and to establish minimum requirements for ozone generator materials and design and construction. This standard specifies the minimum requirements for product literature and labeling information that a manufacturer shall supply to authorized representatives
30、and owners. 1.2 Scope The objective of this standard is to provide a method to determine ozone generator production performance for water applications. This standard covers ozone generators that produce up to 500 g/h (26.4 lbs/d) of ozone. Devices utilizing actual mixing of the gas produced with wat
31、er to be treated shall be precluded from this standard. This Standard does not cover evaluating the effectiveness of an ozone generator for the treatment for water; it also does not cover structural integrity for ozone systems. 1.3 Alternate material, design, and construction While specific material
32、, design, and construction may be stipulated in this standard, systems that incorporate alternate material, designs, and construction may be acceptable when it is verified that such systems meet the applicable requirements. 2 Normative references The following documents contain provisions that by re
33、ference in this text constitute requirements of this standard. At the time of publication, the indicated editions were valid. All of the documents are subject to revision, and parties are encouraged to investigate the possibility of applying the recent editions of these documents. ASTM D4000, Standa
34、rd Classification System for Specifying Plastic Materials1 EPA Requirements for Ozone, Reference: Page 27 of Ozone News, Volume 29,No. 5, October 200121American Society for Testing Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428 2 International Ozone Association P. O. Box 28873,
35、Scottsdale, AZ 85255 www.int-ozone-assoc.org Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license from IHS-,-,- 2006 NSF NSF/ANSI 222 2006e 2 3 Definitions 3.1 concentration: The amount of ozone in the
36、gas stream leaving the generator. Concentration can be reported in weight percent, g/m3, volume percent, ppm by weight, ppm by volume, and the milligrams of ozone per liter of gas produced. Annex A gives conversion factors at one atmosphere standard pressure at 20 C (68 F). Under this standard, conc
37、entration will be reported by weight percent and g/m3.3.2 coolant flow rate: The flow rate of the coolant used to remove heat from the reaction chamber(s) of the ozone generator. NOTE The critical factor for heat removal is the mass flow rate (kg/hr) of the coolant. The mass flow rate of the coolant
38、 is equal to the volumetric flow rate (m3/hr, ft3/hr) of the coolant times the density (Kg/m3, lb/ft3) of the coolant. For liquid cooled systems the density of the coolant (liquid) is virtually independent of temperature and pressure and can be specified as the volumetric flow rate of the cooling li
39、quid (m3/hr, ft3/hr, gpm, Lpm.) For gas cooled systems the density (and therefore the mass flow rate) of the coolant gas is dependent on temperature and pressure. For this standard, the pressure and temperature ranges are small. The volumetric flow rate (m3/hr, ft3/hr, lpm, ft3/min, CFM) of the cool
40、ant shall be specified. As a practical approximation of the mass flow rate. 3.3 dew point (dew-point temperature): The temperature to which air must be cooled to reach vapor saturation (assuming air pressure and moisture content are constant). For Corona Discharge ozone generation the minimum dew po
41、int is 60 C (76 F). 3.4 feed gas: The gas (ambient air, dry air or oxygen) delivered to the inlet side of the ozone generator. The required quality and feed gas flow rate is determined by the manufacturer. 3.5 feed gas flow rate: The flow rate of the feed gas through the reaction chamber(s) of the o
42、zone generator. NOTE The critical factor for the reaction is the mass flow rate ( kg/hr) of the feed gas. The mass flow rate is the volumetric flow rate (m3/hr, ft3/hr) of the feed gas times the density (kg/m3, lb/ft3) of the feed gas. The density of a gas is dependent on the temperature and pressur
43、e. Because of the continuous variability of the parameters affecting density and volumetric flow rate in a ozone generator, there is no practical method to determine the true mass flow rate of the feed gas. For this standard, due to the small range of pressure and temperature, the volumetric flow ra
44、te will be specified as an approximation of the mass flow rate. For pressurized systems, the manufacturer shall specify the volumetric flow rate and the gauge pressure of the feed gas at the inlet to the ozone generator. 3.6 generator cell pressure: The gauge pressure of the feed gas in the reaction
45、 chamber(s). 3.7 ozone generator: A device that when supplied with an oxygen containing gas and power, produces an ozone-containing gas. Said ozone generator includes any controls, transformers and frequency generators required to convert a standard electrical supply (as specified) to the electrical
46、 characteristics required to operate the generator cell properly. 3.8 packaged ozone system: An ozone generator packaged with a gas preparation system, typically on a single skid or otherwise a single unit. 3.9 output rate: The mass of ozone produced by an ozone generator in weight per unit time (g/
47、hr, lb/hr). Output rate is the mass of ozone per volume of product gas (g/m3, lb/ft3) multiplied by the feed gas flow rate (m3/hr, lpm, ft3/hr, CFM). Copyright NSF International Provided by IHS under license with NSF International Not for ResaleNo reproduction or networking permitted without license
48、 from IHS-,-,- 2006 NSF NSF/ANSI 222 2006e 3 3.10 relative humidity: The ratio, in percent, of the actual amount of water vapor in a body of air in relation to the maximum amount that the body can hold at a given temperature. Relative humidity varies with temperature for a given amount of water vapor. 3.11 Short cycle or batch system: Systems that are not designed to operate for more than 5 min at a time. 4 Materials Materials in direct contact with ozone shall be resistant to degradation by
