Recently, China Environmental Industry Association held an expert review meeting in Beijing to review the low-temperature denitration technology of vanadium-vanadium sintering flue gas in Xichang and passed the vote without a vote. This marks the Xuanchang steel vanadium vanadium titanomagnet sintering flue gas NOX control technology in the sintering machine flue gas denitration technology innovation has been recognized by the authority. "Vanadium titanium magnetite sintered flue gas NOX control technology" from Xichang Steel and Vanadium, Institute and Sichuan Environmental Protection Science and Technology Co., Ltd., Landing Environmental Protection Technology Co., Ltd. and other units jointly developed. In view of the current immature, high-cost and unsuitable process route for sintering high-sulfur vanadium-titanium magnetite flue gas at low temperature, the research group has been researching and solving several series of sintering process parameters to continuously control and reduce the sintering process parameters Sintering NOX generation, take full advantage of the unique advantages of vanadium-titanium magnetite, containing a unique vanadium, titanium and other metal particles in the sintering ash to add a certain amount of material, developed a multi-stage dense phase semi-dry method Calcium-based desulfurization system used, cheap denitrification catalyst, Xichang steel and vanadium sintering flue gas to effectively solve the problem of low-temperature denitrification to achieve a multi-stage dense phase semi-dry desulfurization and denitrification device integration, to ensure the efficiency of the desulfurization , Denitrification efficiency up to 58%, the export of flue gas NOx concentrations far below the current national emission standards, the current technology has been the patent declaration. Experts pointed out that the R & D application of this technology has played an extremely important role in exploring the application of the low-temperature denitration technology for sinter flue gas, and has resulted in the reduction of NOx formation during sintering and the integration of desulfurization and denitration in a multi-stage semi-dry desulfurization tower Key technology, the development of efficient, low-cost low-temperature denitrification catalyst, denitrification in the sintering of flue gas technology blooms splendid.
U-tube refers to a heat exchange tube shaped like a U, which is an important part of a U Type heat exchanger. Advantages of U-shaped tube: The U-shaped tube heat exchanger has only one tube plate, both ends of the tube are fixed on the same tube plate, the tube can be stretched freely, no thermal stress, and the thermal compensation performance is good; the tube side adopts double tube side, The process is longer, the flow rate is higher, the heat transfer performance is better, and the pressure bearing capacity is strong. The tube bundle can be drawn out from the shell, which is convenient for maintenance and cleaning, and the structure is simple and the cost is cheap. The disadvantage of the U-shaped tube is that due to the limitation of the radius of curvature of the bend tube, the arrangement of the heat exchange tubes is less, the innermost tube spacing of the tube bundle is relatively large, the utilization rate of the Tube Sheet is low, and the shell-side fluid is easy to form a short circuit, which is harmful to the transmission. When the tubes are leaked and damaged, only the U-shaped tubes at the periphery of the tube bundle are easy to replace. If the inner heat exchange tube is damaged, it cannot be replaced, but can only be blocked. Moreover, one damaged U-shaped tube is equivalent to two damaged tubes, and the scrap rate is relatively high.
U-tube,U Shaped Tube,Bundle Tubes,U Tube Bundle Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.heatexchangerjiema.com