Industrial boilers are indispensable thermal power equipment, at present our country has 733,000 industrial boilers, is the largest producer and use of industrial boilers. According to market forecasts, during the 11th Five-Year Plan period, the normal annual demand of industrial boilers in our country will remain at 120,000 tons of steam and the production capacity of industrial boilers will remain above 150,000-200,000 tons of steam, especially the large-capacity and high- The parameters of the industrial boilers grow faster, and as one of the important universal accessories in the device, steam trap development of the market space is also extremely broad. Steam traps by opening and closing pieces of the drive can be divided into mechanical steam traps, thermal static steam traps, thermal steam traps three categories. According to the National Development and Reform Commission Energy Bureau Heating System Energy Saving Investigation Team report, steam traps installed per tonne of 4.57 steam traps, is expected during the "Eleventh Five-Year" period of the new industrial boiler steam traps demand of 365,600 (Steam traps life of 8000 ~ 12000 hours), coupled with the steam boiler required for the transformation of the old boiler. Seen in this light, the demand for steam traps in industrial boilers during the 11th Five-Year Plan period soared to about 4 million units. Slow down the pace of foreign development Steam traps abroad in the 1980s the rapid development of production and technology, in particular, the rapid development of high-quality products and parameters. The mid-90s has produced a working pressure of 20.0MPa steam traps, the normal life of up to 12,000 hours, the shell material is chromium, molybdenum, vanadium steel, the structure of a thermodynamic type, thermal static type and mechanical type, on behalf of Manufacturers YARWAY and Armstrong companies in the United States, Japan's TLV companies and Miyake, GES Juan TRA in Germany, the United Kingdom SPIRAX-SARCO companies, Canada's VELAN companies. After entering the 21st century, the development of steam valve slowed down significantly, especially in the past 10 years there is no new product available. Such as Germany's GESTRA product structure, varieties have not developed, just to meet the needs of the market, the original BKIS 4 flange bolts into two bolts so that the volume reduction, weight reduction, other manufacturers only in miniaturization article. In addition, the standards of the steam traps have not changed in the past 20 years, and they still follow the standards set in the 1980s. The test methods have not been improved or the high parameters are replaced by low parameters. This is the test for the high-parameter steam traps not scientific. Compared with the advanced countries in foreign countries, the domestic status quo urgently needs to be improved. Compared with the advanced countries in the world, the steam traps are mainly produced in China with low parameters, poor performance, short life span and poor test methods. Only a few manufacturers have Medium pressure following product performance test device, and even some steam traps manufacturers do not test the factory, resulting in trap leakage serious. In the 1990s, the gap between the varieties, specifications and production levels of China's steam traps and the advanced level in foreign countries narrowed down. However, the development of steam traps in China was slow in the past 10 years and the original test equipment was damaged successively. For example, Medium-pressure full-performance test equipment has been demolished, 20.0MPa high-pressure test equipment just built not removed due to relocation; Zhongtong company in Yanshan's full-pressure test equipment has also been disabled for several years; Yangzhou Valve Factory 4.0MPa medium-pressure full-performance test device is also disabled for several years; Dalian high-pressure valve plant built in the power plant in the pressure test device has also been disabled, the only one of the study of steam traps Institute of Beijing Valve also exist in name only , These have great influence on the research and development of steam traps. Based on the above-mentioned various factors, at present, the production level of steam traps in China is somewhat lower than that in the 1980s, and product quality and service life also begin to decline. It is understood that at present only the Beijing Valve Plant Co., Ltd., Gansu Pingliang 1990, Chengdu Aeronautical Instrument Traps Factory, Yongjia County Valve Factory, Longcheng Trap Factory, Shenyang No. 2 Valve Factory, Dalian High Pressure Valve Limited The company, Yangzhou Valve Factory is still producing steam traps, but most manufacturers do not have test equipment, only Chengdu Aeronautical Instrument Co., Ltd. trap factory has PN6.5MPa, 600kg evaporation boiler and full-performance test device, Pingliang nine two ○ Factory, Yangzhou Valve Factory has a performance test device, Beijing Valve Plant Co., Ltd. and other factory test devices, but the test pressure is very low, with no test device is almost the same. Industry experts saw the domestic steam valve after the development of this very anxious, they are eager to enterprises to attach importance to the development of steam traps. From the steam trap production and demand point of view, the gap between China and foreign countries is also very large, only Japan as an example, Japan and China consume similar energy (China's nearly 1 billion tons of standard coal, Japan, 500 million tons of standard coal) Japan steam traps annual production of 3.1 million, each life of more than one year, the leakage rate of less than 3%, steam pipe network, the thermal efficiency of more than 50%; steam traps in China and the annual output of about 2.2 million, an average of Only less than one year of life expectancy, the general leakage rate of about 6%, steam pipe cooling efficiency of about 30%. At present, China's steam traps can not meet the needs of the domestic market both in terms of output, quality and variety of products, and the gaps in the varieties of high-parameter products are also large. From the steam trap product standards point of view, China is currently synchronized with the world, are the late 1980s formulated, although in 2005 some amendments, but in the test methods, the high-parameter steam traps have not been the same Parameters of the test, the performance of high-pressure steam traps (motion, displacement, air leakage) can not be directly tested, the actual product from the use of the request there is a certain distance. Development of technical ideas Steam trap industry based on the status quo, the industry experts put forward its new technology development ideas, that is, humanity, the application of new materials, to achieve mechanical and electrical integration. "High efficiency and energy saving, green environmental protection" is the main direction of China's national economic development in the "Eleventh Five-year Plan" and even in the future. With the enlargement of power (electricity, thermal power, hydropower, wind power), petrochemical and metallurgical equipment, Requirements also will be increased, requiring steam traps work pressure up to 15.0MPa or higher, nominal size of DN150mm or more. Therefore, in the development of steam traps new products, we must consider people-oriented, establish a humane design concept of the product; the continuous application of new materials to the steam trap products; information technology, artificial intelligence technology into the steam trap to achieve mechanical and electrical integration , Is a new way of technological innovation. With the large-scale installation, it is bound to improve the working pressure, nominal size, displacement and working temperature of the steam pipeline. In order to meet the requirements of the plant, it is necessary to develop high-pressure free float type, high pressure disc type, high pressure Bimetal type steam traps, the working pressure of 15.0MPa, 20.0MPa, the working temperature of 570 ℃ ~ 600 ℃. Shell material for the WC6, WC9 and special alloy steel steam traps. In addition, should also develop low pressure, large diameter, large displacement steam traps, the nominal size of DN150mm, DN200mm; development of high pressure large diameter adjustable traps, the working pressure of PN16.0MPa, the nominal size of DN150mm , 200mm. Materials science is considered as one of the most promising disciplines in the new century. In recent years, many new high-performance materials such as nanomaterials, superconducting materials, memory alloys and the like have been used to apply memory alloy to steam traps, Alloy as the steam trap opening and closing pieces, memory condensate temperature and pressure. When the steam trap is steam, the memory alloy closure will be automatically closed, when the condensate to the memory alloy opening and closing pieces, the opening and closing pieces of the memory of the condensate temperature and pressure will automatically open the drainage, drainage is completed, the arrival of steam , Then the temperature will rise, memory alloy closure will automatically close the steam trap. The current rapid development of information technology, steam traps as condensate steam circuit to exclude executive agencies, if we can modern computer technology, sensing technology, networking and remote control technology and smart technology into the steam trap products to Control steam trap opening and closing, in accordance with this idea of ​​the new steam trap design, has been reported in foreign countries. Steam traps a wide variety, there are a lot of differences, the market demand is constantly changing, steam traps manufacturer's production scale and technical level is uneven, but the general trend of steam traps and development of technical ways but there are many Common, as long as the steam trap manufacturers can combine their own conditions, take the scientific development of the road, design and development of new products, will be able to promote the healthy development of China's steam traps industry.