The first type is the bare pipe water wall. This is the simplest structure of the water wall. The advantage is that ordinary seamless steel pipes can be used, and it is more convenient to replace the water wall pipe. The disadvantage is that the temperature of the furnace wall is still high, and heavy refractory bricks are required. The steel frame of the corresponding boiler should be strengthened. , The air leakage of the furnace wall is relatively large. Old-fashioned high-pressure boilers and medium and small boilers are used more frequently.
The second tupe is the membrane water wall. The membrane water wall is welded by seamless steel tubes with fins. The Water Wall Tubes are connected by fins to make the water wall into a whole. This kind of water wall is called a membrane water wall. Its function is to strengthen the heat transfer of the water wall and greatly reduce the temperature of the furnace wall. The furnace wall does not need refractory bricks, but only requires thermal insulation materials. Compared with the conventional heavy furnace wall, the weight can be reduced by 60% ~ 70%, the furnace wall heat storage is reduced by 80%, the start and stop time is shortened, and the fuel consumption is reduced. The load of the furnace steel frame is greatly reduced, saving refractory materials and steel.
The third type is the pierced pipe water wall. The barbed pipe water wall pipe is made by welding many grab nails with a length of 20 to 26 mm and a diameter of 6 to 12 mm on the water wall pipe. It is mainly used to lay the gas belt. Generally, for boilers that burn fuel with low calorific value and low volatile content, in order to stabilize the fire, pierced pipe water walls are often used for laying the fire protection belt.
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As the LED lighting industry enters the mature stage of technology, the service life and luminous flux of LED lamps have been greatly improved, while the price has dropped sharply, and LED has entered the popularization period of the market. With the promotion of domestic energy-saving and emission reduction projects, as the lighting products with the most obvious energy-saving effect and lowest power consumption, LED lamps have gradually been listed in the promotion catalogue and gradually replaced energy-saving lamps. The domestic LED market has expanded rapidly, and the LED lighting industry has entered a golden period.
As the nation's lighting capital, Ningbo has more than 1,000 companies associated with the LED lighting industry. With the gradual launch of the domestic market, Ningbo LED enterprises, which have always been export-oriented, have begun to compete for business opportunities in the domestic market.
The policy is favorable, the domestic market is expanding. With the promotion of energy-saving and emission reduction demonstration projects in key areas in China, Beijing has implemented an action plan to eliminate incandescent lamps. However, in the choice of replacement lamps, the city listed LED lamps for the first time last year. . Last year, Beijing used the government subsidy for the first time to promote 450,000 LED lights.
On the April 24th of this year, the city's energy-saving and consumption-reducing and cage-replacement work conferences sent information, the city will implement the government office agencies LED lighting transformation, and promote the transformation of LED street lighting. This also means that LED lighting products are becoming one of the government's choices in energy saving and emission reduction.
More and more cities are putting LED lighting products in the promotion catalog, which has also boosted the domestic LED lighting market.
According to the research report released by Shenyin Wanguo Securities, due to the maturity of the LED lighting industry technology, the continuous cost reduction led to the opening of the LED home lighting market. The price of LED products has been greatly reduced and the technical indicators have performed better. The penetration rate is from 2013 to 2015. In the continuous rapid improvement phase, it is expected that global LED lighting will increase by 90 in 2014, and the number penetration rate will reach 20.
According to the "Semiconductor Lighting Energy Conservation Industry Plan" jointly issued by the National Development and Reform Commission, the Ministry of Science and Technology and other ministries, the output value of LED lighting energy-saving industry will increase by about 30 per year, reaching 450 billion yuan in 2015, including 180 billion yuan of LED lighting application products.
The sales structure of Ningbo lighting industry products is also confirming this judgment. According to statistics from the Ningbo Lighting Association, the number of LED lighting products produced in the city reached a record of more than 1,100 last year. The total sales of the lighting industry is about 45 billion yuan, of which LEDs account for 23 billion yuan, surpassing traditional lamps for the first time. . Last year, sales of LED products increased nearly 7 times compared with 2008.
Ningbo LED companies have opened online stores to play brands Ningbo is a well-known lighting production center in the country. In LED lighting, Ningbo also has more than 1,100 finished products or accessories companies. Some large enterprises have mature LED products and reliable quality.
But for a long time, the products of Ningbo LED lighting companies are mainly oriented to the international market. However, with the rapid start of the domestic market, Ningbo LED companies have also increased their efforts to expand the domestic market. Ningbo LED lighting enterprises are mostly export-oriented enterprises. Although the quality of technology and products is good, the brands and sales channels are relatively weak. Ren Fengbo, secretary general of Ningbo Electronics Industry Association and Ningbo Semiconductor Lighting Branch, told reporters. However, this situation is quietly changing.
On the road in Hongtang Street in Jiangbei, the street lamps have been replaced by LED street lamps. It is reported that these LED street lamps are produced by Ningbo Liaoyuan Lighting Co., Ltd. In the future, they will also aim at the city's road lighting market. According to reports, as one step ahead in the road lighting market, the products of the company have been applied in streetlights and landscape lighting projects in many cities in China.
As with the original luminaires, the company will focus on the domestic market, as well as the new spectrum. At the end of last year, Ningbo Shengpu Optoelectronics Semiconductor Co., Ltd., located in the high-tech zone, officially opened a store in Tmall under the brand of SUNPULED, and launched five series of LED lighting products. This is an attempt by elders in Ningbo's old LED companies.
Another fast-growing export-oriented lighting company, Ningbo Kaiyao Electric Manufacturing Co., Ltd., has also set its sights on the domestic market. Shen Yanwei, general manager of Kaiyao Electric Co., told reporters that Kaiyao's LED products are mainly indoor lighting. LED product development plans cover home, industrial and mining, office, commercial, hotel, outdoor, architectural, stadium lighting, etc. It will build a network of dealers covering all parts of the country and prepare to spend three to five years to achieve both domestic sales and foreign trade.
The domestic market is huge, and all local governments are considering including LEDs in their new promotion plans. At the same time, due to lower prices, LED products have become the trend of home lighting, so the business opportunities in the domestic market must not be missed. Ren Fengbo said. According to her introduction, there are currently hundreds of Ningbo LED lighting companies adopting various methods to expand the domestic market.
Continuous research and development of new products to enhance competitiveness In the process of expanding the domestic market, the LED lighting enterprises in our city are still working hard on their strengths in technology and quality, and strive to provide products to domestic customers with the best cost performance and service life, ensuring the domestic market. Competitiveness.
Ascension Photoelectricity originated in 1990 and is one of the earliest LED packaging companies in China. In order to provide LED products with the best cost performance and diversified forms of expression, the company has been committed to technology updates and product development, to avoid the dead end of homogenization competition. Ascending Optoelectronics invited LED experts from well-known Taiwanese companies to cooperate with Asachem Optoelectronics and set up a research and development department with local R&D personnel as a technical backing for enterprise market expansion. Ascending Optoelectronics chose the integrated light source COB packaging technology, which not only reduces production costs, but also enables efficient LED light sources. With COB packaging technology, Shengpu Optoelectronics began to enter the LED lighting products industry, in addition to producing high-end LED device packaging, automotive LED devices, COB integration technology development, COB light engine, street lighting and tunnel lighting engine, system integration technology development and other products. , also developed LED fluorescent lamps, spotlights, bracket lights, ceiling lights, mining lights, light bars and other products. Zhang Guang, general manager of Shengpu Optoelectronics, said that as a company that occupies the mid-stream market of LED lighting, we cannot give up the downstream market, but technology is always the main force for market expansion.
On April 24 this year, the United Nations Development Program, the China International Economic and Technical Exchange Center of the Ministry of Commerce and Ningbo Kaiyao Electric Manufacturing Co., Ltd. signed an agreement to promote energy conservation projects. According to the cooperation agreement, the United Nations Development Program will assist Ningbo Kaiyao Electric Manufacturing Co., Ltd. to establish a UNDP-based energy-saving production demonstration base in Ningbo. Ningbo Kaiyao will use the platform jointly established by the United Nations Development Program and the China International Economic and Technical Exchange Center of the Ministry of Commerce to obtain advanced foreign technology and equipment, which will enable Ningbo Kaiyao's production equipment and manufacturing processes to be in line with international standards and enhance market competitiveness. Ningbo Kaiyao will invest 10 million yuan for this project with a period of 3 years. Shen Yanwei, general manager of Kaiyao Electric, said that the cooperation with the United Nations will enable Kai Yao to demonstrate in energy conservation and emission reduction, enhance the influence of the brand and promote the expansion of the domestic market; on the other hand, it will also help Kai Yao reduce production. Energy consumption in the process, thereby reducing costs.
As one of the earliest companies entering the LED industry in Ningbo, Xaerfu Electronics became the fourth company in China to have the CTDP laboratory qualification granted by the US UL Laboratory after the world giants such as Osram, Philips and GM. This means that the company has an excellent product quality monitoring system.
Ningbo's LED lighting industry is not the largest in terms of scale in the country, but its technology is relatively leading. In the national semiconductor R&D alliance composed of 10 companies, Ningbo enterprises occupy 3, which also shows that Ningbo is in LED lighting. Technical strength in the industry. Ren Fengbo believes that with the expansion of the domestic market, Ningbo will form a modern LED lighting industry with a large-scale, complete industrial chain and independent leading technology while providing technology and products to both domestic and international markets. 
The boiler water wall is the main radiation heat surface, arranged inside the boiler chamber and proceeds the heat exchange directly with the high temperature flame. The convection tubes are the convection heat surface of the boiler, arranged between the boiler chamber outlet and the end heat surface and proceed the heat exchange directly with the high temperature fume. The water wall and convection tubes are the main heat surface of the boiler, the tubes diameter for both generally usedΦ 51-60mm boiler steel tubes, also as the request.