In South Korea, the construction of the sewage treatment plant began in 1970. Taking the Seoul Olympic Games held in 1988 as an opportunity, the construction of the treatment plant has made rapid progress. With the rapid expansion of the construction of sewage treatment plants, so far, its penetration rate of sewage treatment has reached 62%. By 2005, 222 sewage treatment plants will be built, so that its penetration rate will reach 80%. If this goal can be achieved, it will be included in the ranks of advanced European countries.
In the past, aeration blowers used motor direct-connected multi-stage blowers. However, since 1985, due to the high efficiency, compact structure and low cost of the gear-increased single-stage turbine blower, it was officially adopted as an aeration blower.
From the market point of view, in the past there were no manufacturers of gear-speed single-stage blowers in Korea. Therefore, European and American manufacturers have successively entered the Korean market. There are four European manufacturers and two American blower manufacturers have entered the Korean market. This has created an unprecedented international competition in the world.
1. International cooperation in producing aeration blowers
Since 1984, Kawasaki Heavy Industries Co., Ltd. and South Korea ’s most powerful Ruiyuan Wind Machinery Co., Ltd. have jointly produced aeration blowers for sewage treatment. The rotor and other major components are produced by Ruiyuan Company, which has the advantage of price competition.
Ruiyuan has produced many multi-stage blowers. In order to make the factory equipment meet the needs of producing single-stage blowers, the company introduced multi-axis CNC machining centers, small rotor precision balancing machines, power frequency conversion devices, etc. Improve the technical level of the single-stage blower manufacturing plant, so that nearly 50 single-stage blowers have been produced so far.
As the only domestic blower production plant in South Korea, Ruiyuan has formed a competitive trend with European and American manufacturers. Moreover, it is highly praised by users for its low unit failure and timely after-sales service.
2. Future market trends in Korea
In view of the high penetration rate of sewage treatment plants in major cities in South Korea, it is believed that the main demand will be to local small and medium-sized cities in the future. The capacity of the blower will also be mainly based on small models (less than 100m3 / min).
The construction of sewage treatment plant has been saturated for nearly ten years. With the continuous development of secondary treatment, that is, high-precision treatment, the need for aeration blowers will continue to grow with the focus on small models in the next ten years.