Hard core east pot! The road to the birth of three "world firsts"

Recently, the WeChat public platform of "Circulating Fluidized Bed Power Generation" released a list of in-service supercritical circulating fluidized bed units. Among the 45 units on the list, Oriental boilers account for 74%, ranking first with 33 units and 3 world firsts.

The top of the mountain is the best in the world. At 0: 00 on September 16, 2020, in the control hall of Pingshuo Power Plant in Guo Xin, located in Shuozhou, all the staff were staring at the display screen of the centralized control room, waiting for an exciting moment. "Five, four, three, two, one", the audience suddenly burst into warm applause and cheers. The delegates attending the ceremony shook hands and hugged happily to celebrate the successful operation of the world's first 660MW supercritical CFB boiler, which is another major breakthrough since the first 600MW supercritical CFB demonstration power station 20 14 in Sichuan Baima World was put into operation. After decades of independent innovation, constant struggle, hard struggle and perseverance, Dongfang Boiler once again stood at the highest peak of CFB technology development in the world, creating the highest in the world.

At present, 45 supercritical CFB units have been put into operation in China, which are distributed in Inner Mongolia, Shaanxi, Shandong, Jiangsu, Anhui, Guizhou, Guangxi, Sichuan, Shaanxi, Guangdong and other provinces, showing a wide distribution trend of large-scale and high parameters. Oriental Boiler people are proud, self-reliant, independent innovation, overcoming difficulties and fighting bravely, making CFB technology the most beautiful oriental boutique, China business card and world famous brand.

Origin: Self-reliance, being the first person to eat crabs.

Baoding power plant 125MW circulating fluidized bed boiler.

In 1970s, Dongfang Boiler began to study CFB boilers, especially in the early 1980s, Dongfang Boiler was keenly aware of the importance of developing CFB boiler technology. With advanced consciousness and firm determination, the feasibility investigation team of CFB technology development was established, and the strategy of CFB technology research and development and market development was formulated. At that time, it was put into the largest hot and cold test-bed of circulating fluidized bed in China, and took the lead in carrying out experiments and research on solid gas flow characteristics, heat flow characteristics, ash particles and their distribution, heat transfer, sewage discharge, ash cooling and discharge, operation debugging and control characteristics. A series of CFB boiler products with standard parameters, such as 20t/h in Yongchuan Coal Mine, 35t/h in Fujian Shishi Thermal Power Plant, 65t/h in Jilin Huadian (oil shale) and 75t/h in Chongqing Nanchuan, were developed.

After the birth of the first 50MWCFB boiler in China, the boiler runs for 8,000 hours every year, winning the orders of 7 100 MW- 125 MW CFB boilers in Yibin, Shijiazhuang and Baoding, thus establishing the leading position of Dongfang Boiler in the technical field of CFB boilers in China.

Growth: independent innovation, towards a big CFB

The first domestic 300MW circulating fluidized bed boiler was successfully put into operation in Guangdong Baolihua Power Plant.

1998—2002, dongfang boiler seized the golden opportunity of the country to vigorously develop CFB boilers, and completed the research and development of the only "135MW CFB boiler scheme with reheat units" with independent intellectual property rights in China by participating in the national key scientific and technological research project "Development of domestic large-scale circulating fluidized bed boilers" during the Ninth Five-Year Plan, and won the "Oriental brand". 56638.6868686666666

In the process of independent research and development of 150MW large-capacity CFB boiler, the "four major calculations of boiler" such as boiler hydrodynamic calculation, thermal calculation, strength calculation and wall temperature calculation have become obstacles for R&D personnel. The R&D team forgot to eat and sleep, and worked day and night to overcome many difficulties. After three years, using the rich experience accumulated by 200MW and 300MW pulverized coal boilers and absorbing the advantages of small-capacity CFB boilers and large-scale pulverized coal boilers, the' four major technical problems' were solved, and the single furnace structure, no external heat exchanger, steam-cooled high-efficiency cyclone separator, two-in-one feeder, mature double flue structure and horizontal type were put forward.

In June 2008, the first domestic 300MWCFB boiler without external bed independently developed by Dongfang Boiler was successfully put into operation in Guangdong Baolihua Power Plant. In May 2009, the project was recognized as "national independent innovation product" by the Ministry of Science and Technology for its advanced technology and excellent performance. Since then, the research and development of CFB boiler technology of Dongfang Boiler has entered a new historical stage.

Transcendence: strive for self-improvement and climb to the top of CFB world.

The world's first 600MW supercritical circulating fluidized bed boiler independently developed was successfully put into operation in Baima Power Plant.

As a brand-new project, 600MW CFB boiler technology has no design precedent at home and abroad. In order to overcome this world-class new technical topic as soon as possible, Dongfang Boiler has established a technical innovation system with itself as the main body, market as the guide and Industry-University-Research as the combination, and carried out special technical research. Focusing on the technical problems such as fluid mechanics technology, bed temperature uniformity, separator arrangement, air distribution uniformity, heat balance distribution, wall temperature calculation, air preheater structure, etc., we have devoted ourselves to research and made great efforts to tackle key problems. Through close cooperation with domestic universities, scientific research institutions and users, on the basis of previous successful experience, theoretical analysis and engineering experience are combined, and various methods such as real furnace test, bench simulation, theoretical analysis and scientific calculation are used. After eight years of brainstorming and careful research, technical design difficulties such as main circulation loop, hydrodynamic design and thermal system are overcome. The economic indicators of boiler operation show that all the data are almost consistent with the technical design parameters, and its technical accuracy is unique in the history of CFB boiler technical design of Dongfang boiler! Dongfang Boiler won more than 60 patents for 600MW supercritical CFB boilers, and the developed 600MW supercritical CFB boilers were listed as "national key new products" and won the "first prize" of national scientific and technological progress in 20 17.

On the basis of drawing lessons from the design experience of R&D 300 MW subcritical CFB boiler and Baima World's first 600MW supercritical CFB boiler, Dongfang Boiler successfully developed a 350MW supercritical CFB boiler with strong R&D strength and through big data analysis, and made a lot of complicated scientific calculations. On September 8, 20 15, the world's first 350MW supercritical circulating fluidized bed boiler was put into operation in Guo Jin Power Plant, which was a new breakthrough made by Dongfang Boiler in the world's circulating fluidized bed research and development history, and was of great milestone significance in promoting the clean and efficient utilization of inferior coal.

Guo Jin Power Plant has also adopted the coupling technology of 1 wth tower solar photothermal and 350MW supercritical circulating fluidized bed coal-fired unit for the first time in China, combining tower solar thermal power generation with traditional coal-fired power generation. According to the calculation that each ton of standard coal produces 2.62 tons of carbon dioxide, 8.5 kilograms of sulfur dioxide and 7.4 kilograms of nitrogen oxides, the 50MW medium-sized thermal power plant can reduce carbon dioxide emissions by about 1 10000 tons, sulfur dioxide emissions by about 360 tons and nitrogen oxide emissions by about 3 10 tons each year. Solar energy supplemented by coal-fired power stations can reduce coal consumption and pollutant emissions. Considering the service life of Sun Island for 25 years, the benefits of emission reduction are more obvious, and it is a truly clean and efficient power generation technology.

Sublimation: Travel far, from "best" to "best"

The 300MW lignite circulating fluidized bed boiler independently developed by Stanari in Bosnia and Herzegovina was put into commercial operation.

Leading technology for serving global customers. Dongfang Boiler adheres to "two-wing Qi Fei" and "two-wheel drive" in domestic and international markets, and CFB boiler has won wide trust from customers all over the world for its excellent performance, excellent quality and excellent service. On August 8, 20 16, the first export 330MW lignite CFB boiler unit independently developed by Dongfang Boiler was successfully handed over to the owner in Stanari, Bosnia and Herzegovina. The project completed the project task 45 days ahead of schedule and entered the two-year warranty period. The unit has stable operation and excellent performance, and the performance index, environmental protection performance and reliability index of the boiler unit all meet the requirements of European standards. The successful commissioning of Stanari Power Plant in Bosnia and Herzegovina marks that CFB boilers of Dongfang Boiler have entered the high-end market in Europe and can compete with international giants on the same stage.

On May 2 1 2065438, local time, the Brazilian Pampa coal-fired power station 1 345MW unit powered by Dongfang Boiler was successfully connected to the grid for the first time. The project is invested by France, and the unit boiler adopts subcritical CFB boiler developed by Dongfang Boiler, and the parameters of each system are normal and stable during operation. This is another successful case that the large CFB boiler developed by Dongfang Boiler has successfully gone abroad.

There is no end to innovation and no end to breakthrough. The insatiable Oriental boiler is moving towards a higher goal of 660MW supercritical CFB boiler technology. For clean coal and coal gangue blended coal with calorific value of only about 2800 kcal/kg, Dongfang Boiler has made customized research and development, fully absorbed mature technologies and successful experiences in circulating fluidized bed technology research and development, equipment manufacturing and engineering application, and further improved the design, upgraded parameters and optimized performance. According to the characteristics of boiler coal quality and steam parameters, the key core technologies such as furnace type selection, thermal system design, hydrodynamic design and wall temperature safety design were checked and compared many times, and one technical difficulty after another was overcome, and the heat transfer characteristics of supercritical CFB boiler furnace, heat load distribution characteristics of main circuit, heat transfer characteristics of low deviation heating surface and debugging control technology of supercritical circulating fluidized bed boiler were mastered. At the same time, a complete set of supporting facilities, such as the overall layout of large-scale circulating fluidized bed boilers, furnace wear prevention, boiler coal ignition, pollutants and so on, has been formed.

Market is the touchstone of products. A good product can only show its value and vitality by transforming its technological advantages into market advantages. At present, 100- 135 MW circulating fluidized bed boilers designed and manufactured by Dongfang Boiler are exported to Indonesia, India, Turkey, Zambia, Philippines, Mongolia and other countries. The domestic market share of 300MW large CFB boiler reaches 70%, and its products are exported to high-end markets in Europe and America.

The world's first 660MW supercritical circulating fluidized bed boiler was put into operation.

Innovation promotes development and strives to make contributions. Looking up at the 660MW supercritical CFB boiler, it is so magnificent. 660MW supercritical CFB boiler consists of hundreds of thousands of parts, nearly 100 meters high and tens of meters wide. Like a tripod, it stands tall on the land of Sanjin. He is a monument, engraved with the inspirational story of China's large CFB boiler from scratch, from small to large, from large to strong; He is a "great power and heavy weapon", recording the glorious history of self-reliance, independent innovation and self-sublimation; He is also a "bright pearl", which shows the heroic spirit of scientific and technological innovation, innovation and re-innovation of Dongfang Boiler CFB!