GB 50050-2007 工业循环冷却水处理设计规范 英文版

GB 50050-2007 工业循环冷却水处理设计规范 英文版 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 harms caused by re-circulated cooling water, guarantee the recuperation efficiency and service life of equipments, 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 equipment, cooling equipment, 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
All sorts of chemicals used in treatment process of circulating cooling water.
2.1.9 Count of Aerobic Heterotrophic Bacteria
The heterotrophic bacteria amount per milliliter water counted through Total Bacterial Plate Count, unit (Entry/ml).
2.1.10 Slime
Viscous substances which is mixed of microbes and mucous excretion, and other organic and inorganic impurities.
2.1.11 Slime Content
Slime volume contained in circulating cooling water, measured through biological filtration, unit (mL/ ).