A process for recovering all components of desulfurization waste liquid
A technology of desulfurization waste liquid and all components, which is applied in the direction of ammonium sulfate, etc., can solve the problems of difficult desulfurization waste liquid treatment, unsalable auxiliary salts, etc., and achieve the effect of resource utilization, content reduction, and simplified process flow
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Embodiment 1
[0026] The desulfurization waste liquid used in this example is the filtrate produced after the ammonia method of coking plants removed from the sulfur paste. Take 500 mL to remove the filtrate after the thio paste, the main component of the filtrate 155 g · L -1 , Ammonium thiosulfate 85 g · L -1 , Ammonium sulfate 45 g · L -1 .
[0027] In the first step, the filtrate passed into the pre-processor for preheating, evaporated. The preheating temperature was 90 ° C, and the evaporation concentration process produced 250 ml of condensate into the desulfurization process, producing a 250 mL concentrate for subsequent conversion treatment, preheating and evaporation heating heat sources are provided by thermally conductive oil.
[0028] In the second step, the concentrated concentrate after pretreatment is transferred into a fixed bed oxidation reactor to catalytic conversion treatment. During the conversion reaction, 200 ml of mass percentage of concentrated sulfuric acid was added, ...
Embodiment 2
[0034] The desulfurization waste liquid used in this example is a meltway sulfur solution produced by the ammonia method of the coking plant. Take 500 ml of the sulfur sulfur, the main component of the sulfur sulfur is 140 g · L -1 , Ammonium thiosulfate 90 g · L -1 , Ammonium sulfate 40 g · L -1 .
[0035]In the first step, the sulfur sulfur liquid is transferred into the pre-processor for evaporation concentration, producing 250 ml of condensate into the desulfurization section, producing a 250 mL concentrate for subsequent conversion treatment, and evaporating heating heat sources are provided by thermal oil.
[0036] In the second step, the concentrated concentrate after pretreatment is transferred into a fixed bed oxidation reactor to catalytic conversion treatment. During the conversion reaction, 25 ml of mass percentage of concentrated sulfuric acid was added, and the volume ratio of the solution and the desulfurization waste liquid gas solution was 100: 1, the reaction tem...
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