1. General Provisions
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 implements, decrease the water pollution and enable the industrial cycle cooling water treatment to be state-of-art, economical and practical, and secure, stable.
1.0.2 This code is applicable 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
1 General Provision
2 Terms and Symbols
3 Circulating Cooling Water Treatment
4 Side-stream Water Treatment
5 Make-up Water Treatments
6 Reclaimed Water Treatments
7 Effluent Treatments
8 Chemicals Storage and Dosing
9 Monitoring, Controlling and Detecting
Annex A Water Analysis Items
Annex B Water Quality Analysis Data Checking
Annex C Circulating Cooling Water pH- Mr Change Curve Diagram
