Degreasing technology jet flotation of the remaini -

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Jet flotation technology in the remaining oil removal of ammonia

2003 Laiwu Steel coking plant and the introduction of more efficient jet flotation oil removal technology. Degreasing degreasing technology jet flotation of up to 85% efficiency, and low running costs, easy operation, and can automate the adjustment, effective and stable system of circulating ammonia and residual ammonia production,[link widoczny dla zalogowanych], after the order process to ensure 52 Fuel & Chemical Fuel & ChemicalProcessesNov. 2005Vo1.36No. 6, stable production. About 1 jet jet flotation flotation degreasing degreasing technology in micro bubble technology is based on the adsorption of oil removal technology developed from the jet way to enhance the high-pressure ammonia dissolved gas remaining capacity for the uniform distribution of micro-bubbles, thereby enhancing oil removal efficiency. The formation of tiny bubbles between 0.2 ~ 0.5mm in diameter, large surface area and strong adsorption not only remove the tar, you can also remove other impurities such as suspended solids, effectively reducing the water content in the COD and BOD , to create conditions for biological wastewater treatment. 2 Jet 2.1 Jet flotation flotation degreasing degreasing machine work principle of the new coking plant in 2003 Laiwu Steel gas purification system uses a series of jet flotation FJL degreasing machine, its working principle is shown in Figure 1. Figure 1 inlet jet flotation degreasing machine works with pressurized ammonia pump, a venturi and then inhalation of ammonia in the air, the mixture of air and ammonia, into the melting chamber. Dissolved air in the room, the air mixed with ammonia further to achieve the purpose of dissolved gas liquids. Degreasing and then enter the flotation chamber, through the jet nozzle jet pressure release,[link widoczny dla zalogowanych], micro-bubbles and then float through the distributor, so that the indoor air bubbles uniformly distributed in the flotation degreasing. Micro-bubble rise in the adsorption process of the remaining ammonia in the tar and other impurities, up to surface, submerged flotation oil removal chamber weir plate, full stream overflow,[link widoczny dla zalogowanych], to achieve oil removal. 2.2 degreasing jet flotation machine adjustment (1) residual ammonia based automatic control valve of imports. Yan and the cycle automatically adjusts the level of ammonia to achieve tank cascade regulation,[link widoczny dla zalogowanych], to ensure the stability of circulating ammonia tank level. Stability of the remaining ammonia into the water, reducing the lag of human action and inaccuracy of degreasing machines for the flotation provided a guarantee stable operation, while reducing labor intensity. (2) residual ammonia exports set manually regulator. Can control the amount of water to control the liquid level flotation oil removal chamber. (3) flotation degreasing interior design adjustable weir plate. The role is a combination of weir plate residual ammonia into or out of water, adjust the right height so that the upper part of the floating flotation degreasing room all full of oil flow to ensure the degreasing effect. (4) dissolved air flotation chamber and the regulating valve located between the oil removal chamber. The role is to adjust the valve leading to the flotation chamber of the radio traffic degreasing (dissolved gas), to ensure that the flotation chamber degreasing degreasing effect. (5) located inlet valves. You can adjust the feed rate, on the one hand for the dissolved gas to provide sufficient gas jet to ensure the flotation oil removal efficiency,[link widoczny dla zalogowanych], on the other hand to prevent too much gas into the jet fluid is relatively small, poor effect of dissolved air, oil removal efficiency. 2.3 Normal operation (1) with automatic control valve regulating the amount of residual ammonia, according to the fluctuation range of the amount of residual ammonia, set the appropriate DCS control parameters. (2) Open pump, open the inlet valve, to observe the status of the aeration flotation oil removal chamber, regulating the oil removal chamber dissolved air flotation valve, until the aeration uniform. (3) regulate the export level regulator, so that the indoor air flotation degreasing liquid to maintain a certain height, while adjusting weir plate height, the oil removal chamber flotation oil floating all over the upper stream, full flow a small amount of residual ammonia, At this point the best oil removal efficiency, low operating costs. 3 Operating Results (1) After six months of actual operation and testing, oil processing capacity of machine 40t / h, an average of 84.34 percent oil removal efficiency, far more than any other oil removal efficiency of oil removal equipment, see Table 1. Table 1 jet flotation machine degreasing efficiency of degreasing date 20o3l20820o4ol052aO4ol202cocl02l0200I4I) 225200403l22004032620o4 butterfly 200404222Oo405l5 water oil / JTlg �� L45643245o470442461455436452441 water oil removal efficiency of oil L856763835376676872 /% 81.284.58682.4888583.284.68583.5 (2) degreasing machines than the centrifugal flotation l2 million in operating cost savings / a. (3) 4 dissolved air flotation oil removal chamber of artificial valves need to be adjusted more difficult, aeration is not enough even, to a certain extent, affected the oil removal efficiency, can be considered an additional pressure balance valve to ensure uniform aeration to further improve the oil removal efficiency.

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