?? Shandong shunxinda Machinery Co., Ltd. (13969559358) is located in Liaocheng Economic Development Zone, Jiangbei water city with beautiful scenery. It is a company specializing in the production, processing and sales of precision seamless pipe, cold drawn precision seamless pipe and cold-rolled precision seamless pipe
New technology of Q345B precision bright tube
Among them, one set of 3200 system was built in 1993, and two sets of blowing gas recovery devices were used in the application company of Q345B precision bright tube series process for medium and low pressure waste heat. The other 3800 system was built in 1996, and the two systems can only recover the blowing air from five gas making furnaces. With the expansion of ammonia production to 120000 T / A in our company, the number of 2600 gasifiers has increased to 9. The original waste heat recovery device of blowing gas can no longer meet the needs of production, especially the following problems exist in the operation of 3200 waste heat recovery system: 1. The internal structure of combustion furnace is unreasonable. The combustion furnace is made according to the drawing of "general design for energy saving of 70t synthetic ammonia per day". The diameter of the furnace is too small, and only the blowing air of two 2600 gasifiers can be recovered; The internal structure is unreasonable, and the heat storage capacity is poor. Sometimes the purge gas is slightly insufficient, so it is easy to extinguish the flame. The CO content in the tail gas is high and the combustion efficiency is reduced. 2. Q345B precision bright tube bundle arrangement is unreasonable, there is no explosion-proof device, so it is not suitable for waste heat recovery of blowing gas. At present, the Q345B precision bright tube has the characteristics of compact structure, reasonable arrangement of tube bundle, explosion-proof water seal and automatic ash cleaning. Compared with the two, the former has low waste heat recovery efficiency, more heat loss and higher exhaust gas temperature. 3. Due to the long service time of the device, the checker bricks of the combustion furnace are damaged, the flue gas resistance is large, and the power consumption is high, which also affects the gas production in the gas making section.
? The new technology of heat recovery Q345B precision bright tube is the key component of the modern combined cycle unit. Since its launch, the design of Q345B precision bright tube has been developing continuously to adapt to the changing operating conditions of combined cycle. The trend in gas turbine design is to use larger and larger machines, which means higher exhaust temperature and more turbulent gas flow. The influence of gas condition and air flow structure on the performance of emission control device must be considered in the design of Q345B precision bright tube. There are two kinds of structure of Q345B precision bright tube: horizontal and vertical gas path. In the horizontal Q345B precision bright tube, the high temperature exhaust gas of the gas turbine flows horizontally, the finned tube of the heat exchanger delivers water, and the steam flows vertically to the gas flow. Because the vertical tube has enough dynamic head, the horizontal Q345B precision bright tube does not need mechanical circulation pump. The evaporator part of the steam passage relies on natural circulation to maintain the circulation of fluid in the evaporator tube. In the Q345B precision bright tube of vertical gas path, the exhaust gas of gas turbine flows vertically upward, and the finned tube of heat exchanger delivers water and steam flows horizontally. Because this arrangement does not provide a suitable head for the system, the vertical Q345B precision bright tube requires one or more pumps to circulate the fluid through the horizontal evaporator tube. This increases the initial investment and operation cost, and may affect the reliability of Q345B precision bright tube.
?? The company reserves a variety of specifications of precision seamless pipe, cold drawn precision seamless pipe, cold-rolled precision seamless pipe, perennial business in Tianjin, Baotou Steel, Baosteel, Hengyang, Angang, Chengdu, Yegang, Lubao, Anyang, Jiangyin, Hongdu and other high-quality seamless steel pipe, alloy steel pipe, high-pressure boiler pipe, alloy high-pressure seamless pipe, thick wall seamless pipe, fluid pipe, structural pipe, chemical fertilizer special pipe, Petroleum cracking pipe, low pressure boiler pipe, large diameter seamless pipe, large diameter welded pipe, precision steel pipe, etc. The materials of common resources are: 10 กม 10, 20 กม 10, 45 กม 10, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 12Cr1MoVG, 15CrMoG, 10CrMo910, 20Cr, 40Cr, 35CrMo, 304, 316, 316L, 310S, 309S, etc.