Instrumentation will have broad application prospects in the water treatment industry

In the first half of 2009, the output of the entire line decreased, and environmental pollution prevention and control equipment also declined almost completely. The decline in water pollution control equipment reached 52.13%.

People usually refer to water treatment, which mainly includes sewage treatment and water purification. Wastewater treatment is divided into industrial wastewater treatment and domestic water treatment. These different types of water treatment processes have different water quality requirements and processing steps. . At present, the requirement for sewage treatment is not only to make it harmless, but also to recycle it, or to collect heat energy from the waste water for reuse. These steps and requirements require a degree of automation in the water treatment system, which is undoubtedly a good market for automation products.

At present, for the control requirements of the water treatment industry, the performance characteristics of the PLC controller are most suitable for this industry. Therefore, it has also been used in a large number of applications in the water treatment distributed control system. Taking the water control as an example, it is in water. The functions of water intake, dosing, filtration, and water supply monitoring and control required by the plant are very common and play a dominant role. From the perspective of the management of the entire group of companies, SCADA systems are often used for macroscopic command, scheduling, and management, so as to achieve the effects and requirements of “centralized command and decentralized control”. Correspondingly, a large number of human-machine interfaces, display instruments, etc. will also have relatively large demands.

In terms of water quality monitoring, water status measurement, etc., a large number of instruments and meters are needed. These instruments and meters used in the water treatment industry are mainly classified into process instruments and analytical instruments. Process instruments include temperature and pressure transmitters, liquid level instruments, flow meters, valves, actuators, etc. The types of instruments are very numerous and detailed, and must be used in conjunction with the corresponding treatment process based on the actual water quality and type of the treated water source. For different types of wastewater such as industrial wastewater, biological wastewater, etc., the treatment process may vary greatly.

Due to the widespread use of distributed control systems for hierarchical control and management, there are also high requirements for the industrial communication methods on which they rely. In recent years, from the more popular fieldbuses to the relatively newer industrial Ethernets, they have been applied in large scale, and the effects have been improved. It is worth mentioning that, in order to meet the application of remote monitoring and other special occasions, wireless communication technology has also been involved in the water treatment industry, and has achieved good results. This is undoubtedly an excellent choice for wired communication. supplement.

In the implementation of the link, the application of the inverter is also more and more common. When the frequency converter is applied to the blower and the pump load, it has multiple advantages. Compared to the adjustment method of the valve and the baffle, the frequency conversion speed regulation can make the speed regulation object run under the energy saving state, and realize substantial cost savings from the principle; at the same time, The use of frequency converters also reduces mechanical losses, reduces the impact of the actuator, and also protects the power grid.

China's water industry is still in its growth stage. Although the government has established the strategic goal of water marketization, it does not systematically study the path of water market reform, and the marketization policy system of urban water is not perfect. In view of the differences in local conditions, cost monitoring Accounting and adjustment of the time and intensity of water price have certain uncertainty, resulting in long-term investment characteristics of water investment is facing greater policy risks, while the competition for various types of capital makes the current water market competition intensified.

In addition, the market concentration is low, lacking industry leaders, and the characteristics of regional monopoly are obvious. According to industry attractiveness and technological relevance, the vertical extension of the industrial chain, and the integration of water services have become the main direction of development. Operational management capabilities, capital operation capabilities, market development capabilities, technology application and development capabilities, and risk control capabilities have become critical success factors for water industry companies. Seeking a balance between market share and investment income is the focus of attention in the growth of China's water companies at this stage.

In the context of the previous international financial crisis, China adopted a policy of expanding domestic demand, promoting economic growth, and placing environmental protection in a prominent strategic position. In the new central government investment of 100 billion yuan in the fourth quarter of 2008, the funds invested in energy conservation, emission reduction, and ecological construction reached 12 billion yuan. The investment for water pollution prevention and control projects in key river basins, and the funds used for urban sewage and garbage treatment facilities and sewage pipe network construction speed up to 6 billion yuan, the former investment is 1 billion yuan, and the latter is 5 billion yuan. It can be said that the sewage treatment industry has ushered in unprecedented opportunities for development.