Domestic environmental problems are frequent, and the state and governments at all levels continue to attach great importance to environmental protection. China's sewage treatment industry is growing rapidly, the total amount of sewage treatment is increasing year by year, and the capacity of urban sewage treatment is constantly improving, the treatment rate of urban sewage has been continuously improved. However, China's sewage treatment capacity lags far behind the rapid expansion of water use, and the industry is at an early stage of development and is poised to take off.
At present, for the water treatment industry to analyze the performance and characteristics of PLC controller can best meet the needs of the industry. In sewage treatment and water supply, although the number of control points, but the main data acquisition and sequence control, the safety requirements are not high, and very few redundant configuration, control requirements are relatively simple, so the application of PLC is relatively more. PLC is the main control system of water supply system. medium-sized PLC plays a leading role in the application of this industry. large-sized PLC is used in some large projects, and more small PLC is used in water supply equipment.
In 2013 the municipal sector was boosted by a 10 per cent increase in the size of applications, spurred by state investment in infrastructure. In the municipal industry, the proportion of the application of medium-sized PLC has gradually increased, mainly because the Sewage Treatment and municipal water plants in the large cities of Yiwei have been basically completed, the industry has started to shift to the second and third lines, and there are more and more small and medium-sized water plants, therefore, the application of medium-sized PLC has increased. In the sewage treatment industry more manufacturers to Rockwell International, Omron, Schneider, Yiwei, Hollysys and so on.
The report of the 18th National Congress of the Communist Party of China (CPC) clearly puts forward the road of intensive, intelligent, green and low-carbon urbanization. The decision of the Central Committee of the Communist Party of China on major issues of deepening reform in an all-round way, adopted at the Third Plenary Session of the 18th Central Committee of the Communist Party of China, has established the position of the construction of an ecological civilization system in the overall deployment of deepening reform in an all-round way, at the same time, it is proposed to establish a market-oriented mechanism to attract social capital to ecological and environmental protection, and to carry out the third-party control of environmental pollution. Environmental protection is becoming an important theme of the new-type Urbanization, and the advancement of the new-type urbanization also brings business opportunities for the environmental protection industry. Urbanization is one of the most important potentials of China's economic growth in the future. The aim of new urbanization is to improve people's quality of life. Sewage treatment, underground pipe network construction and other urban infrastructure projects will be the focus of future urbanization. From the point of view of the entire industrial chain, Environmental monitoring, sewage treatment, reclaimed water utilization, sludge treatment, site rehabilitation and other aspects will be valued.
In order to promote the development of China's energy-saving and environmental protection industries, in August 2013, the State Council issued 'opinions on accelerating the development of energy-saving and environmental protection industries, ' proposing that the annual average growth rate of the output value of energy-saving and environmental protection industries will be over 15 percent by 2015, the total output value of the energy conservation and environmental protection industries reached 4.5 trillion yuan. More importantly, the 'opinions' also put forward the energy conservation and environmental protection industry to become a driving economic growth, promote structural adjustment of the vanguard.
In recent years, as an important pillar of the environmental protection industry, the sewage treatment industry has been developing vigorously in our country, and the technology of Sewage Treatment construction, operation and management has been greatly improved. Among them, the automatic control system as an important part of the operation and management has been more and more attention. With the strengthening of industry supervision, the increase of labor cost and the need of enterprise's profit, the development space of sewage treatment automation, information and intelligent technology is opened up.
Sewage by source can be divided into: domestic sewage and industrial sewage. According to the market space of domestic sewage, with the development of social economy, the acceleration of urbanization and the improvement of living standard, the discharge of domestic sewage is increasing. From 2003 to 2012, China's domestic sewage discharge increased from 24.76 billion tons to 46.27 billion tons. In the past ten years, domestic sewage discharge increased year by year, with an annual compound growth rate of 7.19% . With the acceleration of China's urbanization process, for every 1 percentage point increase in the urbanization rate, more than 10 million people will come to live and work in cities and towns, calculated on the basis of the current average annual per capita discharge of domestic sewage of 65 tons, will bring at least 650 million tons of sewage discharge each year, the market space is huge.
According to the 'analysis and forecast of China's environmental and economic situation from 2008 to 2020' issued by the Environmental Planning Institute of the Ministry of Environmental Protection and the State Information Center, under normal improvement of the handling level, china's investment in wastewater treatment during the 12th and 13th five-year plans will reach 1,058.3 billion yuan and 1,392.2 billion yuan, respectively, china's investment in wastewater treatment during the 12th and 13th five-year plans will reach 1,278.1 billion yuan and 1,560.3 billion yuan respectively.
From the perspective of industrial wastewater market, the industrial wastewater discharge in China has not been effectively controlled. In recent years, most serious pollution incidents are related to the discharge of industrial wastewater. With the strengthening of supervision and regulation, the market space for wastewater treatment will be further opened, and the investment demand for wastewater treatment in the six industries of papermaking, textile, petrochemical, chemical, non-ferrous metals and steel is expected to reach 117.8 billion yuan between 2013 and 2015. According to the Twelfth five-year plan for Energy Conservation and emission reduction, the construction of sewage treatment facilities in key industries will be vigorously promoted during the twelfth five-year plan, papermaking, textile, food processing, processing of agricultural and sideline products, chemical industry, petrochemical and other industries respectively added daily sewage treatment capacity of 3 million tons, 600,000 tons, 600,000 tons, 6 million tons, 2 million tons, 3 million tons.
The sewage treatment belongs to the municipal category, because at present the commonweal is bigger than the profit, however, along with the policy and regulation consummation and the domestic environmental protection industry's development, the sewage treatment industry industrialization and the marketization, as the sunrise industry, the future of this industry is very bright. PLC as the core component of Sewage Treatment, the market for its needs will be self-evident.