| The pharmaceutical industry related to national economy and people’s livelihood.H2S, VOCs in pharmaceutical wastewater treatment workshop of pollutants not onlystimulate people’s sense of smell, and it is poisonous and harmful gases. Gathering,purification, etc need to be taken measures to prevent harm to human body.Stench and biogas produced by wastewater treatment workshop inpharmaceutical factory as the research object. Volatile way of stench from wastewatertreatment unit, dissipation rate model and mass transfer coefficient of H2S, etc isanalyzed. Based on stench component monitoring, concentration of stench, theolfactory threshold and toxic pollution characteristics be analyzed; Kinds of stenchgas-collecting cover with standard κ-ε turbulence model, finite volume method ofapplication and SIMPLE algorithm for predominate control equations is used in CFDby the ANSYS software. Simulation results include the distributiont of static pressuredistribution, gas velocity and concentration of H2S, etc within stench gas-collectingcover. Gas-collecting cover structure and ventilation parameters be optimized throughadjusting outlet-fan pressure of all kinds of structure, make the ventilation couplingH2S releasing rate.NMP/FeCl3absorbing liquid wet oxidation stench of H2S technology wasdeveloped due to the pollution characteristics for H2S in the stench. Catalyst screeningexperiment showed that purification efficiency can be stable at more than94%usingsolution of0.3mol/L FeCl3with60%NMP when the H2S concentration is400ppmcontain10%O2. In addition, through the research for the double membrane theoryabout the new absorption catalytic system of NMP/FeCl3, mass transfer model andreaction kinetics model, that be demonstrated NMP/FeCl3catalytic absorptionsolution balanced on C(Fe3+):C(Fe2+) ratio1:0.58. Higher concentration of Fe2+improves the rate of Fe2+regeneration to Fe3+. When content of O2in gas is more than6%, the catalytic requirement of the pharmaceutical wastewater treatment stenchcontains H2S can be satisfied. So the operations is unnecessary blowing air to absorbliquid, such as the traditional absorption catalytic oxidation.The technology of modified sepiolite adsorption VOCs in stench was developed.By experiment sepiolite of hydrothermal and acid modification static adsorptionstyrene represented of VOCs, the static saturated adsorption amount is271mg/g. Dynamic adsorption experiments have shown that through time in advance, throughadsorption quantity increases with the increase of the concentration of styrene, andthrough the adsorption quantity reduced at higher temperatures. TPD spectra,SEM-EDS, determination of specific surface area and pore diameter, XPS scanninginfrared spectrogram, the FT-IR spectra, TG/DTA tga are characterized. All that showmodified sepiolite has better adsorption performance than the original sepiolite.Biogas containing H2S produced in wastewater anaerobic unit have thecharacteristics of small volume and high concentration H2S. Activity Fe2O3adsorptionpurification H2S in biogas technology was developed. Through of Fe2O3adsorbentremoval H2S in biogas experiments show that particle size, temperature, H2S content,space velocity, etc. process parameters has certain influence on the sulfur capacity ofthe adsorbent. Accumulation of sulfur capacity was37.6%in purifying H2Sconcentration from1000to8000ppm, at15℃~45℃of biogas, can meet therequirements of industrial application.The technology about ventilation, absorption, adsorption is used in thepharmaceutical industry. By optimizing the combination of these new technologies, Inthe course of application showed good stability and environmental benefits. |
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