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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The automotive industry chain in Mainland China is growing rapidly, including well-known electronics manufacturers such as Asustek, VIA, Lite-On, Hon Hai, Yisheng, MiTAC, Quanta, Compal, etc., which are active in the Western automotive electronics market, especially the global satellite navigation system (GPS). ) The most optimistic.
Xu Shengxiong, chairman of the Taiwan Electromechanical Association (CEC), said that at present, the proportion of Asian cars equipped with automotive electronics is only 20%, European cars have reached 40%, indicating that in the future Asia (especially mainland China) automotive electronics The market has huge potential, and all three major Japanese automobile plants have been stationed in Guangzhou and the industrial chain is growing. It is worth paying attention to Taiwanese electronics manufacturers.
The report said that the Association of Electro-Electronics has established the "Automobile Electronics Industry Alliance" and hopes to establish a dialogue platform for the industry and integrate the value chain of the automotive electronics industry today. Xu Shengxiong, who led the delegation to visit Guangzhou, said that if the two sides of the strait can establish common standards across the strait, and assist manufacturers to use the Taiwan or mainland auto factories as market verification, experience accumulation, and market practice results, then they can build a model of cooperation with major international manufacturers. In order to promote the commercialization of key products, it gradually entered the supply system of international car manufacturers.
It is reported that electronic technology companies on the island have rushed into the mainland automotive electronics market. After Hon Hai's acquisition of the automotive wire harness plant Antai Electronics Co., Ltd., it began to deploy the automotive electronics industry. In addition to setting up automotive electronics production lines in Kunshan, Jiangsu and Guangxi, Shenzhen’s Foxconn also The establishment of automotive electronic parts department, Shanxi investment in Mg-Al City also aims to focus on auto parts and components factory. 
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.