1.A status quo power plant regulating valve
Power plant control valves are mainly distributed in the boiler, turbine and auxiliary three large systems, followed by distribution in many auxiliary systems. For the temperature and pressure steam turbine parameters generally use a small amount of domestic conventional control valve, and for high-parameter, high-capacity thermal power units, usually greater than 100MW or more units, the introduction of more and more on the use of the control valve. Parameters, the greater the capacity of the units, thermal power plant control technology, safety and economic operation of the unit on as the primary goal, and a wide variety of control valve on as an effective means to achieve safe operation. For example, China Shanghai Plant generating station entrance, two sets of parameters 600MW supercritical generating units, with a total of more than 400 various types of control valves and electric valves, distributed in various systems, including control valves are imported from abroad, which in domestic machinery and equipment is rare.
1.1 Domestic 100MW units
Our 60 years in the 20th century {BANNED} begin the design and manufacture 100MW units. Shanghai Turbine Works (referred to SAIC factory) production in 1965 in Taichung asked reheat the first 100MW unit, the first run in Wuhan Qingshan plants. Later Harbin Steam Turbine Plant (Kazakhstan steam plant), Dongfang Steam Turbine Works (East steam plant) and Beijing Heavy Steam Turbine Plant (Northern weight) have also manufactured. 1970s and 1980s as one of the main unit, has put into operation in the country has reached 138 units or more 100MW units.
Nearly a decade meters, SAIC factory also produced two times extraction thermoelectric dual turbine 100MW, which control valve steam turbine systems from abroad, each 8, regulating valve auxiliary boiler systems, some from abroad, in part by domestic production.
1.2 Domestic 125MW Unit
SAIC plant from 1969 Wujing Power Plant put into operation in the first sets of double water cooled 125MW units, has been put into operation 20 years more than 108. The rest put into operation, in order to build more than 50 units, which is a thousand cards early SAIC plant unit.
This unit's turbine system is still imported from abroad each valve 10, as well as from more than 10 domestic purchases. Boilers and auxiliary system has more than 30 valve, also part of the introduction, some domestic.
China's first power plant, Shanghai Yangshupu power plants, imported from Germany, two sets of 125MW units, all control valves are imported from abroad, which each control valve boiler system has 16.
SAIC plant in the United States to introduce Westinghouse technology and domestic 125MW, based on recently developed a series of 135 ~ 200MW units, each unit has a turbine system control valve 16 from abroad.
With the improvement of the parameters and the capacity of the entire power plant system regulating valve basically all imported from abroad.
1.3 Domestic 200MW Unit
From the 20th century, the beginning of 70 years {BANNED}, Harbin Steam Turbine Plant in northeast Chaoyang first 200MW unit power plant put into operation, and later East steam plant, north heavy manufacturing plants also have this unit, has been put into operation in the country more than 174, the number of units in a variety accounted for the largest. This valve power plant units is greater than the number of the most obvious 125MW units, estimated at more than 50 per above, in principle, introduced from abroad, the number of its control valve is very considerable.
1.4 Domestic 300MW unit
Shanghai Turbine Works from the 20th century, 70 years {BANNED} homemade hair type 4-cylinder four 300MW steam turbine exhaust steam of 29 units have been put into operation.
1987 Sichuan Dongfang Steam Turbine Works has also developed a 300MW unit, put into operation the first power plant in Shandong Yellow Taiwan, has 10 years of safe operation, under construction and orders have more than 40 units.
We investigated the improved domestic 300MW unit 4 in Shanghai Shidongkou plant, power station valve regulate the amount of each unit is very impressive. Where the boiler valve bypass system from Gadelins company introduced 10 each, turbine and auxiliary bypass system from Sulzer introduced seven from Masoneipan introduction 22, from the introduction of 25 wild indiscriminately, as well as imported from Japan, East Asia 26 and from Fisher, Leslis such as valve Corporation introduced.
1.5 introduced 300MW unit
Our Westinghouse in 1981 with the United States signed a 300MW subcritical pressure steam turbine technology transfer contract, in June 1987 the first power plant in Shandong stone cross a station put into operation, now has more than 50 units put into operation, under construction and orders have been more than 40 units or more. Each turbine system which has a regulating valve 14 and Leslis company introduced from Fisher, auxiliary systems from each company introduced 40 Fisher control valves, boilers and other systems will have more control valve from abroad.
SAIC factory spend more than $ 500,000 a year to buy foreign regulator, Shanghai Boiler Factory orders component parts of each year amounted to more than 100 million yuan, including a large number from abroad, including regulating valve. Auxiliary power plant is also true, control valve such large units are all imported from abroad, the price of each hydrophobic regulating valve at 120,000 yuan.
Beijing Heavy Steam Turbine Plant 330MW from the French company Alstom to introduce technology, now have been put into operation, the control valve are all imported from abroad.
1.6 introduced 600MW subcritical unit
Our Westinghouse in 1981 with the United States signed a 600MW subcritical pressure steam turbine technology transfer contract, through the introduction of digestion and absorption of technology and localization technology research, in November 1989 the first station by the introduction of technology produced by Harbin Turbine Plant 600MW Unit Anhui Pingyu power Plant into operation. Later SAIC plant steam plant with Kazakhstan introduced 300MW and 600MW exchange technology, and now the country has put into operation more than one 600MW unit running, under construction orders have more than 40 units. Such as Ningbo Beilun Port plant has five sets of 600MW units, Shanghai Wujing Power Plant has two sets of 600MW unit, East steam plant in cooperation with Hitachi also introduced 600MW unit now has operations.
This level of 600MW thermal power units, used in power station valve greatly exceeds the number of 300MW units. SAIC plant 600MW steam turbine system introduced from abroad each valve 18. Regulating valve almost all other systems from abroad, because the greater the power to require its safe operation of the unit is higher.
1.7 introduced 600MW supercritical pressure units
Our company introduced from ABB 600MW supercritical pressure unit was second plant in Shanghai stone cave and put into operation in 1992. Put into operation the machine can be used for several years has reached 91.47 percent. 1996 1 to May the average coal consumption of 307g / kW · h. Ministry has been named as the "first-class power plants," which marks a development direction.
We visited the plant, research, collect data. The plant's control valve and electric valve competition of more than 400, all imported from abroad, the annual maintenance must also buy a lot of control valve accessories from abroad.
2 power station valve prospects
(1) China's electric power development in national economic development has always occupied the first place, especially in the period from 1987 to 1995, and since last year is the fastest growing power development in the history of China, the biggest achievements of the golden age.
The country's total industrial output power industrial output rose from 3.12% in 1987 to 6%. Now each new generation equipment production capacity of more than 50000MW, in order to build and a large crew of 300 ~ 600MW greatly exceed more than 80 units or more.
On the basis of 300MW, 600MW steam turbine based on the development of more powerful (1000MW level) project supercritical pressure steam turbine plant has been implemented. Toshiba has put into operation the second 700MW supercritical reheat unit. In order to better the economy of coal water-rich region of the rapid development of the poor, our decision to focus on the development of 300 ~ 600MW air-cooled generators. In order to improve the thermoelectric efficiency, a large 200 ~ 300MW thermal power turbine is also being developed. Nuclear power industry is also developing rapidly. On the basis of the original number of nuclear power plants being introduced 1000MW nuclear power plant. Therefore, the development of large units in China's power industry is an inevitable trend, which will require a lot of use of various types of valves, while China from 100MW, 300MW over a large number of units and almost all imported valve products, which raises many famous foreign valve company to China to seize the market.
The next 15 years of power development forecast in the future, the focus is on the development of 600MW supercritical units and larger capacity, improve and optimize the 300 ~ 600MW sub-critical units, the development of large-scale thermal power units, the development of steam - gas-fired combined cycle and appropriate to accelerate the nuclear power industry. In the long run, nuclear power industry has broad prospects for development, currently identified using standard 300MW nuclear power loop as to facilitate the development of 600MW, 900MW, 1200MW unit. So in the next 15 years, the Chinese domestic market, the amount of power generation equipment requirements are quite large, is the world's most promising markets, entrepreneurs should be aimed at this market foresight.
Adhere to the domestic equipment mainly imported equipment, supplemented by the development of China's power industry this principle. To this end, the Chinese government is developing a series of policies to attract foreign investment aspects, including with foreign equity bid. 300MW units below, in principle, re-import, only the importing country still can not produce a large stand-alone more than 600MW supercritical units, encourage the use of our joint venture power plant equipment, and so on domestic policy regulating valve station localization is clearly beneficial to support and the.
(2) the technological transformation of the old unit from the power station valve to see the broad market. Large units put into operation in our country has reached more than 591, the oldest are more than 20 years, require technological innovation, many of the control valve needs to be updated. The historic factory, because of the old units put into operation more important task of transformation, has been used as the main content of the current production tasks. A large number of power plants provide for the annual operation of the unit for minor repairs, overhaul 2 to 3 years, in the overhaul of the need to replace a certain number of control valves and fittings, control valves manufacturers should be fully sufficient attention to this market. If the average per unit supporting 50 NTU valve calculations, the total valve 591 * 50 = 29,550, calculated at an annual rate of transformation of repair 10%, the annual need for 2955 regulating valve replacement, the average price per valve was 80,000 yuan, the 2955 * 80000 = 236 million yuan, this data can be seen from the control valve in the annual overhaul of the market. Manufacturers should organize inspection force, to provide a large number of plant products and accessories. 3 Understanding and recommendations
3.1 unified understanding
After adjusting valve for power plant market research, so that we see the regulating valve in the power plant field huge market. Although Wuzhong Instrument Factory and other valve manufacturers in the previous years have also done a lot of work, but for the power plant industry, after all, is not enough understanding of the power plant are not familiar with the expertise, coupled with the special nature of the power plant industry, so so far, there is no open station control valve market.
Wuzhong Instrument Factory in the national chemical industry, metallurgy and other fields, the regulator valve products have a great reputation, has become an authority on domestic enterprises, it should be said valve products have considerable strength in the foundation and development of power plant regulation.
At present, many domestic valve manufacturers do not have the plant has advantages, coupled with the introduction of the plant power station valve technology, in regard to the control valve and control valve sales conventional boiler system, has accumulated experience.
3.2 clearly the main target
From the status quo power station valve, we found that many of the special control valves are imported from abroad. We can choose one or two control valves as research objectives, such as auxiliary systems hydrophobic water level control valve and control valve steam turbine steam seal system to the difficulty of properly, sales of large research as a principle objective of this opinion only reference.
3.3 Methods head
(A) the formation of talent. On the one hand engage in the design of power plant control valves experienced retired engineer; hand amateur college to hire experts to participate in the research and development institute.
(2) for various multi-channel project. First is a project-oriented company. Followed by the application through the provinces Electricity Authority and national authorities project, so it is advantageous to open up the situation.
(3) the opportunity to use the power plant maintenance, organizational and technical personnel under the plant mapping to introduce products for development and production of accessories make basic preparations.
(4) the establishment of technology centers R & D base, attention to numerical simulation theory, research and the establishment of the physical test bench control valve in order to develop products for rigorous testing to meet or exceed the level of foreign ensure the quality, performance.
3.4 improving quality, creating performance
Technology is the driving force, the quality is the life, only well-designed, well-made, quality service and continuous technological innovation, create more performance, in order to make the development of the control valve products stand our ground, the relationship is important, but the premise is the quality of and performance.
4 Conclusion
China's economy in the next period of time remains a high growth rate, the power industry will subsequently sustained and rapid development. Introduction of product localization is China's national policy, and power plant control valve market potential. As long as we have the leading technology, innovation, attention to research and development of products, processes and attention to material quality, us. Will be able to overcome the difficulties on the road ahead, so China's power station valve to create a brilliant tomorrow.
