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1、I J IS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association Water conditioning for boiler feed water and boiler water ICs 27.060.30 Descriptors : steam boilers, water, water testing Reference number : JIS B 8223 : 1999 (E) 9s Copyright Japanese Standards Associatio
2、n Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 B 8223 : 1999 Foreword This translation has been made based on the original Japanese Industrial
3、 Standard revised by the Minister of International Trade and Industry through deliberations at the Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law. Consequently JIS B 8223 : 1989 is replaced with JIS B 8223 : 1999. Date of Establishment: 1961-02-01 Date
4、of Ftevision: 1999-11-20 Date of Public Notice in Official Gazette: 1999-11-22 Investigated by: Japanese Industrial Standards Committee Divisional Council on General Machinery JIS B 8223 : 1999, First English edition published in 2001-08 Translated and published by: Japanese Standards Association 4-
5、1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, ele
6、ctronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTN
7、o reproduction or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS B 8223 : 1999 Water conditioning for boiler feed water and boiler water 1 Scope feed water and boiler water of land steam boiler and marine steam boiler. This Japanese Industrial Standard specifies
8、 the water conditioning for 2 Normative references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards indicated below shall be applied. Glossary of terms for thermal power plants-Boil
9、ers and auxiliary equipment JIS B 0126 JIS B 8224 Boiler feed water and boiler water-Testing methods JIS K 0556 Testing methods for determination of anions in highly purified water For the main terms used in this Standard the definitions in JIS B 3 Definitions 0126 and JIS B 8224 apply, and the rest
10、 of the terms are as follows. 0 d) e) f) feed water The mixed water with condensate (1) and make-up water (2) sup- plied to the boiler entrance (economizer entrance if an economizer is provided) by a feed water pump. However, when special components such as dissolved oxygen of feed water is made the
11、 object, the feed water is the water sampled from the sampling position of the feed water specified in 3.2 of JIS B 8224. Notes (1) Condensate refers to water condensed in and after the portion of the system where steam is used, and reused for feed water. (2) Make-up water refers to water mixed with
12、 condensate for water feeding. When no condensate is available at all, the total quantity of feed water corresponds to make-up water, and the quantity of make-up water when almost all the amount of steam generated is recovered as con- densate corresponds to the shortage of the feed water amount (for
13、 example, the steam use, the blow, and the leakage). boiler water The water condensed in the circulating boiler. Generally, this water is represented by water in the drum. circulating boiler The generic name of natural circulating boiler and forced circulating boiler. The circulating boilers include
14、 cylindrical boilers, special circulating boilers and water tube boilers. natural circulating boiler The natural circulating boiler refers to a boiler which is designed to circulate naturally boiler water by the difference of den- sity of saturated water including steam bubbles. forced circulating b
15、oiler The forced circulating boiler refers to a boiler which is designed to circulate boiler water forcedly by using a circulating pump. cylindrical boiler The cylindrical boiler refers to a boiler of which the shell is the main body and in its inside, a flue tube, fire box, smoke tube, etc. are pro
16、vided. The cylindrical boilers include vertical boilers, flue tube boilers, smoke tube boilers and flue tube smoke tube boilers. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDT
17、No reproduction or networking permitted without license from IHS -,-,- 2 B 8223 : 1999 special circulating boiler A water tube boiler (3) which is constructed of tubes mainly, feeds in water from one end, takes out the mixture of steam and water from the other end, and after separating by steam sepa
18、rator, makes the return- ing amount of steam-and-water mixture to heating tubes 50 % or less. These boilers include the forced circulation type boiler(4) consisting of single or a few tubes, and the boiler (5) constructed of plural tubes, all of which are heating tubes of risers, and a header. Notes
19、 (3) This boiler is handled as the once-through boiler in the Industrial Safety and Health Law and the Safety Regulation for Boilers and Pressure Vessels. (4) It is commonly called a single tube type boiler. (5) It is commonly called a plural tube type boiler. water tube boiler The water tube boiler
20、 refers to a boiler constructed of a drum and many heating water tubes and to conduct evaporation in the water tubes. once-through boiler A boiler of such type that the feed water runs through the boiler by using its pump to evaporate. maximum operating pressure The pressure specified to use a boile
21、r safely from a structural viewpoint, which is a pressure not more than the lowest value among the maximum operating pressures predetermined for each portion of the boiler (the pressure indicated on pressure gauge). This pressure is expressed by a pressure at the boiler shell (the exit for once-thro
22、ugh boilers). evaporation rate of heating surface The evaporation amount per hour kg/(m2. h) in the unit heating surface area of the evaporation section. alkali treatment The method of treatment to adjust the pH of boiler water mainly with sodium hydroxide and adjust the concentration of phosphate i
23、on by phosphate (mainly sodium salt). phosphate treatment The method of treatment to adjust the pH and the con- centration of phosphate ion of boiler water by phosphate (mainly sodium salt). volatile matters treatment The method of treatment by the use of volatile matters only, in which the pH of bo
24、iler water or boiler feed water is adjusted by ammonia or volatile amine and the dissolved oxygen is removed by hydra- zine. oxygen treatment The method of treatment to add a micro amount of oxy- gen as oxidizing agent to feed water of high purity and to prevent corrosion by the protective film whic
25、h is mainly made of a-iron (III) oxide (a-Fe203: hematite) on the steel surface by the oxidizing action and is maintained by its action. Informative reference : Treatment with sodium hydroxide The method of treatment to adjust the pH of boiler water with a trace of sodium hydroxide in place of phosp
26、hate, and to strictly control the concentration of the chloride ion. i Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTNo reproduction or networking permitted without license fr
27、om IHS -,-,- 3 B 8223 : 1999 4 Water conditioning The details of water conditioning of boiler feed water and 0 - - boiler water vary among cylindrical boiler, special circulating boiler, water tube boiler and once-through boiler and shall be as follows unless otherwise specified: . a) Cylindrical bo
28、iler The water conditioning of cylindrical boiler feed water and boiler water shall be as given in Table 1. b) Special circulating boiler The water conditioning of special circulating boiler feed water and boiler water shall be as given in Table 2. Water tube boiler The water conditioning of water t
29、ube boiler feed water and boiler water shall be as given in Table 3. Once-through boiler The water conditioning of once-through boiler feed water shall be as given in Table 4. Further, the steam conditioning for operating of steam turbine shall be as given in Table 5. c) d) 5 Test Water conditioning
30、 test method of boiler feed water and boiler water shall be in accordance with JIS B 8224 and JIS K 0556. For the continuous monitoring of water conditioning of boiler feed water and boiler water, automatic meters should preferably be used. The automatic meters include a pH-meter, an electric conduc
31、tivity meter, a dissolved oxygen meter, a silica meter, a hydrazine meter, etc. Informative reference : Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTNo reproduction or networ
32、king permitted without license from IHS -,-,- 4 B 8223 : 1999 Table 1 Water conditioning of boiler feed water and boiler water for cylindrical boiler - Divi- sion - Feed water Boiler water Maximum operating pressure MPa (9 Evaporation rate of heating surface kg/(m2 h)l _._._._ Kind of make-up water
33、pH (at 25 O C ) Hardness (mgCaCO3lZ) Fats and oils (mg/Z) (9) Dissolved oxygen (mg/Z) Treatment method pH (at 25 O C ) Acid consumption amount (pH4.8) (mgCaCOd) Acid consumption amount (pH8.3) (mgCaCOd) . Total evaporation residue (mg/Z) Electric conductivity (mS/m) (at 25 O C ) Sulfite ion (mgS032-
34、/Z) (I3) Hydrazine (mgNz however, the unit MPa is used in this Standard. The numerical value expressed in the unit kgUcm2 can be obtained by multiplying the numerical value expressed in the unit I. MPa by about 10 more accurately, 10.197 162 times ( o.o98o665 The numerical value expressed in the uni
35、t MPa can be obtained by multiplying the numerical value expressed in the unit kgf/cm2 by about 0.1 (more accurately, 0.098 066 5 time). This applies to the case where raw steam is used and make-up water is used at all times in cast iron boiler. City water, industrial water, underground water, river
36、 water, lacustrine water, etc. Further, the softened water is the raw water treated by softening device (filled with cation-exchange resin) or by reverse osmosis device. Hexane extraction substance (refer to JIS B 8224). 1 Copyright Japanese Standards Association Provided by IHS under license with J
37、SALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTNo reproduction or networking permitted without license from IHS -,-,- . 5 B 8223 : 1999 (10) It is preferable to keep low. (11) Conventionally, the unit pS/cm has been used for the unit of the electric con
38、ductivity; however, the unit mS/m or yS/m is used in this Standard unless otherwise specified. The numerical value expressed in the unit pS/cm can be obtained by multiplying the numerical value expressed in the unit mS/m by 10, or by multiplying the numerical value expressed in the unit pS/m by 0.01
39、. (12) This applies when phosphate is added. (13) This applies when sulfite is added as deoxidation agent. In the case of using a degassing device, It is preferable to adjust to 10 to 20 mgS032-/Z. (14) This applies when hydrazine as deoxidization agent is added to feed wa- ter for a cylindrical boi
40、ler or a water tube boiler not more than maxi- mum operating pressure 2 MPa. However, in the case of using a degassing device, it is preferable to adjust to 0.1 to 0.5 mgN2HdZ. Hydrazine is dissociated in water, and present as hydrazinium ion (NzH5). Remarks 1 When the ion-exchanged water is used fo
41、r make-up water of cylindri- cal boilers, see Table 3 and apply the water conditioning in the case where the ion-exchanged water is used for make-up water in the pres- sure division over 1 MPa up to and including 2 MPa. 2 When the ion-exchanged water is used for marine boilers, see Table 3 and apply
42、 the water conditioning in the case where the ion-exchanged water is used for make-up water in the pressure division over 1 MPa up to and including 2 MPa. However, the concentration of phospho- rous ion should be preferably adjusted higher taking into consideration the leakage of sea water. 3 As a r
43、ule, add either hydrazine or sulfite as oxygen reducing agent. 4 The sample for testing the boiler water shall be taken from the most condensed boiler water. 5 In the case of the flue and smoke tube boiler to be used at the pres- sure exceeding 2 MPa, water conditioning of water tube boiler indi- ca
44、ted in the same pressure division in Table 3 shall be applied to water conditioning of the boiler water. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 19:41:54 MDTNo reproduction or netwo
45、rking permitted without license from IHS -,-,- 6 B 8223 : 1999 Table 2 Water conditioning of boiler feed water and boiler water for special circulating boiler Divi- sion Feed water Boiler water - Type of boiler Maximum operating pressure MPaV) . . Kind of make-up water pH (at 25 O C ) Hardness (mgCa
46、CO3lZ) . Fats and oils (mg4 (9) Dissolved oxygen (mgO/Z) Iron (mgFeAl . . Total evaporation residue (mglZ) Electric conductivity (mS/m) (“1 (at 25 O C ) Acid consumption amount (pH4.8) (mgCaC 03/11 Acid consumption amount (pH8.3) (mgCaCO3lZ) Hydrazine (mgN2;3 u h a2 Y ea a2 ?i u k 8 + m 8 i + - O O
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