biogas dedicated sulfur melting kettle, sulfur recovery equipment

1.Fundamentally resolve the pollution of desulfurization effluent 2.Recycle the vice salt and make them into industrial products  Biogas dedicated sulfur melting kettle Widely used in coking, city gas, oil field gas, gas desulfurization of small and medium nitrogen fertilizer enterprise, and other chemical industries.1,Equipment overviewThe sulfur melting kettle has three parts: internals, inner barrel and vapour jacket. The internals and barrel were made of stainless steel, can resist corrosion. The advanced design completely separated the sulfur and the solution, then can obtain sulfur in one step.2,Production capacityThe ability of sulfur melting kettle is related to the sulfur bubble concentration, the sulfur concentration in the bubble is higher, the production ability is greater. But the sulfur bubble concentration shouldn't influence it's flowability. By actually measurement, the production capacity is good when the concentration is about 6%.3,ConsumptionPower consumption. This technology only retained sulfur melting kettle compared with the traditional technology. The power consumption only exist in the sulfur foam conveying from collection slot to the sulfur melting kettle.Steam consumption. The sulfur foam temperature entered into the kettle is generally about 40 °C, discharged solution temperature is about 60-90 °C. The higher the sulfur concentration in the foam, the lower the solution which the sulfur recycling discharged, the lower the steam consumption is. It has been determined that, 1 T sulfur(concentration is about 5%) can consume saturated vapour (0.4 Mpa )1.5 T.Chemical material consumption reduced. The process has no waste discharge, so can reduce the consumption of chemical materials. Because of different scales and sulfur recovery methods, can economize chemical materials about 10 thousands to hundreds of thousands yuan after using continuous sulfur recovery kettle.4,Characteristics1),Large handing capacity, normally can deal with sulfur bubble 3T-5T.2),Simple process and less equipments, can complete sulfur separating and melting in on step.3),Don't need to build workshop, has lower investment compared with the method, filter first and then melt sulfur.4),Low separating temperature, the active ingredient of melting sulfur can't be destroyed. The content of sulfur in the solution is low(suspension sulfur is <0.8g/L). Can be recycled, can't block the thionizer, can economize chemical materials.5),Easy operation, so the operators don't need special training, less pumps, one operator can operate.6),Low steam consumption, 1T sulfur can consumpt about 1.7 T steam(different catalysts are different, sulfur content in the sulfur bubble is above 6% ).7),No waste discharge, accord with the state environmental protection requirements. Vice salt extractionThe desulfurization effluent extracting is the proprietary technology of Weifang Mingshuo Environmental Protection Equipment Co.,Ltd. This technology adopted solvent method separation, separate the thiocyanate and thiosulfate from the desulfurization effluent, and then recover them. And recycle the desulfurization solution produced from the process of extraction. Fundamentally resolve the pollution of desulfurization effluent. Recycle the vice salt and make them into industrial products, changing waste into valuable. Production process1,Process flow2,Process flow diagram3,Process flow schematic diagram4,Ammonium thiocyanate extraction1),Pretreatment the desulfurization effluent, remove therein suspension sulfur, sulfur mud, coal mash, and other impurity after cooling, static settlement and filtration.2),Add a certain amount of activated carbon into the spreadhead, after warming, stirring, filtering and other measures, obtain the qualified clear liquid and isolate the waste activated carbon. The waste activated carbon can be recycled or burned in the coal blending. The clear liquid entered into the storage tank for the using of next process.3),Decompression concentrate the desulfurization clear liquid. When concentrating, add the clear liquid or mother liquor slowly, increase the vice salt density step by step. When concentrated to a certain temperature and concentration, centrifugal separate and hot filter the concentrated liquid, then isolated the ammonium thiosulfate, ammonium sulfate, and other salt mixture.4),Refrigeration the concentrated liquid after filtering, it can extracted ammonium thiocyanate crystals, then separate the solid and liquid by centrifugal machine, and then obtain the ammonium thiocyanate. The mother liquid entered into the concentration kettle, concentrated with the desulfurization clear liquid, and then recycling. 5,Thiosulfate conversion processing1),Dissolve the sulfo- coarse salt in the dissolving tank, then delivery into the oxidation decoloration kettle, add a certain amount of activated carbon, after the decoloration oxidation reaction, obtain the filtrate after filtering.2),Oxidate the filtrate in the oxidation kettle, separate the solid and liquid by centrifugal machine, then obtain the sulfur. Deal with the filtrate and store in the tank.3),Concentrate the clear liquid in the concentrating kettle, when concentrating , add the clear liquid slowly. When concentrated to a certain temperature and concentration, Deliver the concentrated liquid into the crystallization kettle.4),Refrigeration the concentrated liquid, when reach to a certain temperature, it can extracted ammonium sulfate crystals, then separate the solid and liquid by centrifugal machine, and obtain the ammonium sulfate. The mother liquid recycling. 6,Economic benefitsA,Direct economic benefitsTake the production capacity of 2400000 tons coke per year for example, deal with 22000 tons desulfurization solution yearly, recover 2000 tons ammonium thiocyanate, annual production (consumpt electricity 55 degrees and steam 0.8 tons per m3 effluent, electrovalence 0.65 yuan per degree, steam 100yuan per ton )1),Power consumption: 0.65yuan/kwh×55kW/m×22000=786500 yuan2),Wages: 28 persons×24000/person =672000 yuan3),Steam: 0.8t ×22000×100yuan/t =1760000 yuan4),Activated carbon: 22000t ×0.3%(activated carbon dosage) ×3500yuan/t =231000 yuan5),Packaging: 60yuan/t × 2000t =120000yuan6),Repair charge: 200000yuan per year7),Total cost per year: 786500+672000+1760000+231000+120000+200000=3769500yuan8),Total cost plus duty of 1t ammonium thiocyanate: 376,9500÷2000t=1885yuan/t9),Selling price: 6000yuan/t.10),Profit per ton: 6000-1885=4115yuan/t11),Annual profit: 4115yuan/t ×2000t/year=8230000yuan/year B,Indirect economic benefits1),After extract the vice salt, the effluent no longer used for coal blending, reduce the discharge of sulfur and SO2 in the coal, thereby reduce the production costs, increase the benefit. The vice salt in the desulfurization solution reduced, can increase the absorption rate of H2S, reduce the dosage of catalyst and ammonia, also can reduce the production costs.2),Reduce the corrosion to equipments and pipelines. Saved maintenance costs, extend the operation cycle of the equipments.3),Can appropriate increase the proportion of high-sulfur coal. The ammonium thiocyanate extraction is physical change, complete the extraction of ammonium thiocyanate through decolorating, filtering, concentrating, crystallizing, filtering, and other processes.The ammonium sulfate and sulfur extraction include physical change and chemical reaction. Complete the extraction through oxidated decolorating, filtering, oxidating, purifying, concentrating, filtering, crystallizing, filtering, and other processes.

biogas dedicated sulfur melting kettle, sulfur recovery equipment