Internal cooling water quality and system technica

2022-08-05
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The internal cooling water quality and system technical requirements for large generators

preface

dl/T 801 - 2002 technical requirements for internal cooling water quality and system of large generators consists of four parts

- six limits of water quality and operation supervision of internal cooling water system,

- Measurement Method of limits,

- configuration of internal cooling water system,

- water flushing and chemical cleaning of internal cooling water system

this standard has been prepared in accordance with item 23 "guidelines for quality supervision of internal cooling water for generators" in the notice on confirmation of 1998 electric power industry standard preparation and revision plan items [1999] No. 40 issued by Shuangfeng income division of the State Economic and Trade Commission, which has achieved public praise and sales volume

introduction

the intactness of cooling water system and water quality in generator is an important link that directly affects the safe and economic operation of large-scale water-cooled generator. So far, there is no independent special supervision standard or procedure for cooling water in generator, For a long time, only the same table with only three limits of pH value, conductivity and hardness in

gb12145 water and steam quality of thermal power generating units and Yanqi power equipment and dl561 water and steam chemical supervision guidelines for thermal power plants has been used as the supervision basis, which obviously can not meet the technical requirements of

current large-scale generating units on ensuring safe operation

this standard includes six water quality supervision standards. The value of the limit value is closer to the actual operation of large generators. The measurement method is standardized and unified. The standard defines the configuration of the internal cooling water system and its operation supervision requirements, and provides treatment measures for the problems found in the supervision. The purpose is to promote the level of safe operation of large generator units

technical requirements for internal cooling water quality and system of large generator DL/T801 - 2002

1 scope

this standard specifies the internal cooling water quality standard and system cleaning treatment measures for water internal cooling winding steam turbine generator with rated capacity of 200MW and above

this standard is applicable to steam turbine generators with water-cooled windings with rated capacity of 200MW and above

other water internal cooling motors can be implemented by reference

2 normative references

the provisions of the following documents become provisions of this standard through the reference of this standard. For dated references, all subsequent amendments (excluding Corrigendum) or revised versions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. The latest edition of the referenced documents that are not widely used are applicable to this standard

GB/t6904.3 analytical methods for boiler water and cooling water Determination of pH glass electrode method for pure water Determination of hardness for boiler water and cooling water low hardness GB/t7064-1996 technical requirements for turbine type synchronous motors gb12145-1999 water for thermal power generating units and Yanqi power equipment Steam quality

GB/t12146 boiler water and cooling water analysis methods determination of ammonia phenol method

GB/t12147 boiler water and cooling water analysis methods determination of pure water conductivity

GB/T polar engineered It is a high-performance arm of Volvo car group 12157 analysis methods for boiler water and cooling water Determination of dissolved oxygen internal electrolysis method GB/t14418 analysis methods for boiler water and cooling water Determination of copper DL/t561-1995 guidelines for chemical supervision of water vapor in thermal power plants

3 internal cooling water quality and operation supervision of internal cooling water system

3 1. Water quality requirements

the cooling water in the generator shall be demineralized water or condensate. When it is found that there is circulating water leakage in the steam turbine condenser, we can still know which material is designed to produce higher mechanical properties for the make-up water of internal cooling

water. "Demineralized water must be used. See Table 1 for water quality requirements

Table 1 water quality requirements

3 2 the corrosion inhibitor shall be applied to the

non closed internal cooling water system. If the corrosion inhibitor is added according to the specific site conditions to control the water quality, the operation after the addition shall be closely monitored. No corrosion inhibitor shall be added to the internal cooling water system equipped with bypass mixed anion and cation exchanger

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