Process design and equipment selection of Nonferrous Metal Co.’ s 700 kt/a sulphuric acid plant based on copper smelter off-gas are described.The plant adopted a cleaning section consisting of two-stages DynaWave scrubbers,packed cooling tower and two-stages wet electrostatic precipitators,a 3+1″ⅣⅠ-ⅢⅡdouble absorption process and tail gas treatment using new catalytic desulphurization technology.The 72 h full-load operation with 10.39% SO2 at converter inlet showed stable running,with the total conversion of 99.39%,absorption efficiency of 99.99%,tail gas SO2 concertration of 197 mg/m3,process water consumption of 4.0 m3/t,power consumption of 107.04 kWh/t and production of 16 t/h 0.6 MPa,164 ℃ low-pressure saturated steam.
There is provided a fiber bed for removing liquid aerosols and soluble solids from a gas stream in a fiber bed mist eliminator. The fiber bed is in the form of a flexible mat having a void fraction of greater than about 0.89 and greater than about 700 net collection targets. The mat includes a layer of collecting fibers having an average fiber diameter between about 1 and about 5 &mgr;m. The collecting fibers are stabilized by a plurality of stabilizing fibers which penetrate into and are disposed interstitially within the collecting fiber layer. The improved fiber bed of the present invention is field-replaceable and, by utilizing fibers having a small average diameter, the thickness of the fiber bed may be reduced.
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Post time: Feb-21-2023