摘要：在日常运行中为了降低补充水用量和排污水量，会提高循环冷却水的浓缩倍数，从而节约水资源，减少对环境的污染和废水的处理量。过多地提高浓缩倍数，会使循环冷却水中的结垢和腐蚀倾向增大，选择缓蚀阻垢剂复合水处理剂的优点和选择药剂时需要考虑的因素。
关键字：浓缩倍数；循环水日常运行；复合缓蚀阻垢剂
在日常运行中为了降低补充水用量和排污水量，会提高循环冷却水的浓缩倍数，从而节约水资源，减少对环境的污染和废水的处理量。此外，提高浓缩倍数还可以节约水处理剂的消耗量，从而降低冷却水处理的成本。
需要注意的是冷却水的浓缩倍数并不是越高越好。因为过多地提高浓缩倍数，会使循环冷却水中的硬度、碱度和浊度升的太高，水的结垢倾向增大很多，从而使结垢控住的难度变得太大；还会使循环冷却水中的腐蚀性离子和腐蚀性物质的含量增大，水的腐蚀性增强，从而使腐蚀控制的难度增加；过多地提高浓缩倍数还会使药剂在冷却水系统内的停留时间增长而水解。
为了保证日常运行时间，进而需要选择一些复合缓蚀阻垢剂。来控制循环水的结垢和腐蚀倾向。与单一水处理剂相比，复合缓蚀阻垢剂有以下优点：
（1）其中的缓蚀剂与缓蚀剂之间、缓蚀剂与阻垢剂之间往往存在协同作用或增效作用；
（2）可以同时控制多种金属材质的腐蚀；
（3）可以同时控制腐蚀与水垢或污垢的形成；
（4）可以简化加药的手续。
因此，在循环冷却水处理中广泛使用各种复合缓蚀阻垢剂，同时控制冷却水系统中的腐蚀和沉积物。但是用于循环冷却水的缓蚀剂和阻垢剂的品种较多，所组成的复合缓蚀阻垢剂的品种就更多了。
一般在选择复合缓蚀阻垢剂时需要考虑：
（1）是否适用于该冷却水系统运行的ph值范围；
（2）能否使冷却水的浓缩倍数达到设计要求；
（3）运行的费用和用户的经济条件，这里不仅要考虑复合缓蚀阻垢剂的费用，而且还要考虑原水预处理和排污处理的费用以及对工艺生产带来的影响；
（4）复合缓蚀阻垢剂的供应来源；
（5）操作管理是否方便；
（6）当地环保部门的规定和对周围环境的污染；
（7）工艺生产发生事故时，泄漏的物料对复合缓蚀阻垢剂作用的干扰；
（8）复合缓蚀阻垢剂和配用的杀生剂的相容性；
（9）使用的换热器的结构、材质以及预膜、涂料的处理情况。
通常是在考虑上述因素的基础上，还需根据水质特性通过实验筛选并确定出适宜于该水质的复合缓蚀阻垢剂。在实际生产运行过程中，视其效果再调整复合缓蚀阻垢剂的配比及投加量。
在日常运行中也需要对冷却水系统的补充水和循环水的化学组成和物理化学性质进行监测和控制。来观察正常运行时使用的水处理剂是否能发挥好作用。
产品英文详情介绍
abstract: in order to reduce the daily operation of makeup water and sewage water amount, increase of concentration of the circulating cooling water, thereby saving water, reduce the processing amount and wastewater pollution of the environment. when excessively increased concentration ratio, make the circulating cooling water fouling and corrosion tends to increase, the advantages of corrosion inhibitor compound selected water treatment agent and an agent selection considerations. keywords: concentration factor; circulating water daily operation; composite corrosion inhibitors in the daily operation in order to reduce the amount of makeup water and sewage water, increase of concentration of the circulating cooling water, water saving, and to reduce environmental pollution wastewater treatment capacity. furthermore, raising the concentration factor can also save the consumption of water treatment agent, thereby reducing the cost of cooling water. note that the concentration factor of the cooling water is not higher the better. since excessive increase of concentration, will circulating cooling water hardness, alkalinity and turbidity rise too high, a lot of water fouling tendency is increased, so that the difficulty becomes too large scale restrain; also the content of the circulating cooling water and corrosive substances corrosive ions increases, the water enhancing corrosion, thereby increasing the difficulty of controlling corrosion; concentration ratio will excessively increase the residence time of the agent in the cooling water system growth the hydrolysis. to ensure the daily operation time, and then need to select a number of complex corrosion inhibitors. to control the circulating water corrosion and fouling tendencies. compared to a single water treatment agent, corrosion inhibitor compound has the following advantages: (1) between the corrosion inhibitor therein, there is often a synergistic effect or synergy between the corrosion and scale inhibitor ; (2) can control more corrosion of metal materials; (3) may control the formation of scale or corrosion and fouling simultaneously; (4) may be simplified dosing procedures. thus, the circulating cooling water is widely used in various composite corrosion inhibitors, while controlling the cooling water system corrosion and deposits. however, the variety used for circulating cooling water corrosion and scale inhibitors are more complex variety of corrosion inhibitor composed of even more. when the composite is generally selected corrosion inhibitors to be considered: (1) apply to the ph value of the cooling water system is running; (2) suggest that the concentration multiple of cooling water to meet the design requirements; costs (3) runs and economic conditions of users, here not only to consider the cost of complex corrosion and scale inhibitors, but also consider the cost of raw water pre-treatment and sewage treatment process and the impact on production caused; (4) composite corrosion and scale inhibitors sources of supply; (5) whether convenient operation and management; (6) and the regulations of the local environmental protection department of pollution to the surrounding environment; (7) the process of production accidents, leakage of material interference with the composite effect of corrosion inhibitors; ( 8) mhc corrosion inhibitors and equipped with a biocide; (9) a heat exchanger used in the structure, materials, and handling of the pre-film coatings. usually in consideration of the above factors on the quality characteristics of the filter according to the need and it is determined that the water quality suitable for composite corrosion inhibitors experimentally. in the actual production run, depending on the dosage and effect of the ratio of corrosion inhibitor compound readjustment. also it needs to be monitored and the control of the cooling water system of the chemical composition and physical and chemical make-up water and circulating water in the daily operation of properties. to see if water treatment chemicals used in normal operation can play a good role.
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