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The power industry is facing water - saving ability test

Article source: Shenzhen XinRuiDa Electric Power Equipments Co., Ltd.Popularity:3490Time:2016-10-27SmallInLarge

At present, the per capita freshwater resources of most coastal cities in our country is less than 500m3, which is lower than the international standard of 1000m3. The cities such as Tianjin, Shanghai, Dalian, Qingdao and Lianyungang are less than 200m3, and the shortage of water resources has seriously constrained the coastal areas Regional economic and social development bottleneck.

In this context, the power industry as a large water users, the face of water shortage problems doubled pressure, but at the same time, desalination technology such as coastal areas to solve the lack of fresh water an important way.

According to industry stakeholders told reporters, "the State Council on accelerating the development of desalination views" and " 'second five' desalination industry development plan" and other industrial incentives will be introduced in the near future.

As a result, the water-saving work of the power industry put forward higher requirements, how to use water-saving technologies to alleviate the water resources and energy production of the urgent relationship, placed in front of the power companies.

Seawater desalination pros and cons

Davos World Economic Annual Report warned that the world is facing a "water crisis", water resources in the future may be more expensive than oil.

It is understood that thermal power plants supply 84% of the country's electricity, data show that by 2020, China's installed capacity is expected to double to reach 1900 GW, at least 500 GW will come from coal-fired power generation.

However, the water consumption of coal-fired power plants is about twice that of gas-fired power plants, and the rapid increase in installed capacity is the sharp decline of water resources in China.

ADB's study shows that in 2030 China is expected to have about 70 billion cubic meters of water gap. It is foreseeable that the next few years, human competition for water resources will intensify.

According to the survey, the power industry is a large water, but also in the water-saving potential.

Although inexhaustible seawater, inexhaustible, but the industry was also questioned the desalination technology.

Some experts believe that the brine desalination of seawater desalination is usually 2 times the sea water, a corresponding increase in density, emissions into the sea, it will cause a large number of marine life death.

In addition, desalination technology significantly increases greenhouse gas emissions. Seawater desalination is a high-energy-consuming industry and relies heavily on non-renewable energy sources. Therefore, the desalination of seawater deserves careful consideration of the effects of large amounts of greenhouse gas emissions on climate and the environment.

In recent years, China has issued a series of plans, such as "special plan for seawater utilization" and "sea water utilization standard development plan", to provide policy support for the development of seawater desalination industry in power industry.

Innovative water - saving technology

As the 2011 National Popular Science Day activities, one of the sub-venues, September 20, China Electrical Engineering Society organized a "power plant water-saving thematic exchanges and exhibitions", the National Development and Reform Commission, Deputy Director of Resource Conservation and Environmental Protection Department "In some areas, the lack of awareness of the importance of water scarcity, the overall efficiency of seawater utilization is still very low, water - saving technology research and development still need to increase.

In fact, China's power industry water-saving technology in addition to desalination technology, there are other technical applications. Such as the use of urban water in the water plant, to achieve water resources, with open source, cutting expenditure, reducing pollution and so on. Again, mining drainage technology, in some parts of our country has begun to use. In 2009, coal production reached 3.05 billion tons, mine water discharge has reached 9.15 billion tons.

"The current air-cooled unit has been widely used in dry areas in northern China, as of 2010, the National Development and Reform Commission approved the total capacity of air-cooled unit 911.7 million kilowatts, air cooling unit has been put into operation more than 70 million kilowatts." China Power Engineering Consultant Group of senior engineer Chai Jingyu said.

In 2004, the National Development and Reform Commission requested in the northern region should be used in principle, air-cooled unit. Many domestic power generation projects have been prepared to use air-cooled units, but the air-cooled technology by the German company GEA and the United States SPX monopoly. At that time, China has not been running more than 300MW large-scale air-cooled unit.

It is reported that the National Development and Reform Commission requires China Power Investment Group to carry out large-scale air-cooled unit of domestic research and development work, the CLP Group decided to Tongliao three 600MW air-cooled units to carry out R & D projects based on work. September 2004, the National Development and Reform Commission approved the project for the 600MW unit air cooling system of domestic demonstration projects.

October 2006, the National Development and Reform Commission will "large-scale air-cooled thermal power units complete sets of equipment development" included in the national major equipment development projects.