GB/T 50050-2017 (GB 50050-2007) PDF English
US$150.00 · In stock · Download in 9 secondsGB 50050-2007: Code for design of industrial recirculating cooling water treatment Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Obsolete GB 50050: Evolution and historical versions
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Code for design of industrial recirculating cooling water treatment
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| GB 50050-2007 | English | 150 |
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GB 50050-2007: Code for design of industrial recirculating cooling water treatment---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50050-2007
NATIONAL STANDARD GB ...-·• ... ; ' '
OF THE PEOPLE'S REPUBLIC OF CHINA
Code for Design of Industrial Recirculating
Cooling water Treatment
I ~fl IA\ It *P 7J< ~JI ii it~ m
Issued on: OCTOBER 25, 2007
Implemented on: MAY 1, 2008
Ministry of Construction of the People's Republic of China
Jointly issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Table of Contents
General Provision . 1
2 Terms and Symbols ... 2
2.1 Terms ... 2
2.2 Symbols ... 5
3 Circulating Cooling Water Treatment ... 7
3 .1 General Provision ... 7
3.2 System Design ... 11
3.3 Anti-precipitation and Corrosion Inhibition Disposal... 14
3 .4 Precipitation & Filtration Treatment... 15
3.5 Microorganism Control .. 17
3.6 Cleaning and Pre-filming ... 18
4 Side-stream Water Treatment ... 20
5 Make-up Water Treatments ... 22
6 Reclaimed Water Treatrnents ... 24
6.1 General Provisions ... , . 24
6.2 Advanced Treatment ... 25
7 Effluent Treatments ... 27
8 Chemicals Storage and Dosing ... 29
8.1 General Provisions ... 29
8.2 Sulfuric Acid Storage and Dosing . 30
8.3 Anti-precipitation & Corrosion Inhibitor Combination and Dosing ... 30
8.4 Bactericide Storage and Dosing ... 31
8.5 Liquefied Chlorine Storage and Dosing . 31
9 Monitoring, Controlling and Detecting ... 33
Appendix A Water Analysis Items ... 36
Appendix B Water Quality Analysis Data Checking ... 37
Appendix C Circulating Cooling Water pH- Mr Change Curve Diagram ... 38
Explanation of Wording in This Code ... 39
1 General Provision
1.0.1 The code is formulated to implement national water resources saving and environment
protection policies, promote the cyclic utilization of industrial cooling water and the sewage
reclamations, effectively control and reduce all sorts of banns caused by re-circulated
cooling water, guarantee the recuperation efficiency and service life of implements, decrease
the water pollution and enable the industrial cycle cooling water treatment to be state-of-art,
economical and practical, and secure and stable.
1.0.2 This code is applied to newly-built, expanded and re-built re-circulated cooling water
treatment designs which adopt surface water, groundwater and reuse water as make-up water.
1.0.3 Industrial cooling water treatment design should correspond with demands such as
production safety, environment protection, energy conservation and water saving, and is
facilitated to carry out construction, maintenance and operation management.
1.0.4 Industrial cycle cooling water treatment design should introduce state-of-art
productive practice experience and scientific payoffs and adopt new technique positively and
prudently.
1.0.5 Industrial cycle cooling water treatment designs should correspond with relative
national current standards and specifications, besides this code.
2 Terms and Symbols
2.1 Terms
2.1.1 Recirculating Cooling Water System
A water-feed system that water circulates as cooling medium, and consist of heat-
exchange implement, cooling implement, processing facility, water pump, pipe and other
relative facilities.
2.1.2 Indirect Open Recirculating Cooling Water System
A circulating cooling water system that the heat is transferred between circulating
cooling water and cooling medium cooled, and recirculating cooling water contacts with the
atmosphere directly.
2.1.3 Indirect Closed Recirculating Cooling Water System
A circulating cooling water system that the heat is transferred between circulating
cooling water and cooling medium cooled indirectly as well as between circulating cooling
water and cooling medium.
2.1.4 Totally Closed System
An indirect closed recirculating cooling water system that its circulating cooling water
doesn't contact with the atmosphere.
2.1.5 Semi Closed System
An indirect closed recirculating cooling water system that it's circulating cooling water
contacts with the atmosphere partially.
2.1.6 Direct Open Recirculating Cooling Water System (Direct Open Recirculating Cooling)
A circulating cooling water system that the heat is transferred between circulating
cooling water and cooling medium cooled, and recirculating cooling water contacts with the
atmosphere directly.
2.1.7 Open System
A general term for indirect cooling open system and direct cooling system.
2.1.8 Chemicals
2 If the safety water-feeding time is greater than lh, and accident water consumption is
less than normal water feeding volume, the high-capacity diesel oil pump should be combined
with elevated tank to supply water, and at the same time accident discharge bay should be
emplaced at the low point of the system;
3 If safety water-feeding time is less than lb, the elevated tank should be adopted to
supply water, and at the same time the accident draw-off valve should be emplaced at the low
point of the system.
3.2.7 The circulating cooling water shall not be used as the direct current water.
3.2.8 Circulating water area Layout should sheer off the downwind direction of the plant,
and be far away some locations such as from coal yard, boiler and blast furnace. The
surrounding ground of the cooling tower should be paved or covered with plants.
3.2.9 The piping design of indirect open cooling water system should correspond with
following specifications.
1 The return pipe of circulating cooling water should be connected to the by-pass pipe
of cooling-tower basin;
2 Circulating cooling water pipes of heat-exchange implement should be installed with
by-pass pipe or by-pass pipe interface;
3 Make-up water pipe diameter and pool water discharging pipe diameter of circulating
cooling water system should be identified in accordance with duration demands such as
evacuation, leaning, pre-filming, displacement, and the displacement duration is inadvisable
to be greater than Sh. When the make-up water pipe is installed metering device, the by-pass
pipe should be installed;
4 For circulating cooling water pipe, it should be emplaced inspection manhole, and
spacing interval of inspection manholes is inadvisable to be greater than 500m, if the pipe
diameter is not less than 800mm;
5 The draw-off valve should be emplaced at low point of piping system while the air
evacuation valve should be emplaced at high point.
3.2.10 The closed system piping design should correspond with following specifications.
1 Circulating cooling water supply main pipe and heat-exchange implement water
supply pipe should be emplaced with pipe-line filters;
2 The condensate make-up piping should be designed in accordance with 4-6m system-
suffusing;
3 When pH value of make-up water is lower than 7.5, conduit pipes should adopt
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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