The demand of water treatment chemicals grows rapidly.The data show that the growth
 rate of water treatment chemicals is about 12%.The reason of strong demond to water
treatment chemicals is not only policies and regulations,resource shortage,the increase
 of water price,the attention to the environment,but also the technological progress.The
 water treatment chemicals mainly use to municipal and industrial water treatment.In
municipal  field,the  method of  non-chemical less  pollution  and more hygiene.So this
method  of water treatment is more welcome in local government. Compared  with the
municipal  applications, the  demand of industrial is more and the  requirement is higher,
especially in the Circulating water and sewage treatment.