Method for making acid by using sulfur-containing materials
A technology for making acid and materials, applied in separation methods, sulfur compounds, chemical instruments and methods, etc., can solve the problems of low heat exchange efficiency, high energy consumption, and poor dust removal effect in the waste heat recovery system, and achieve increased heat exchange efficiency, The effect of less energy consumption and improved cleaning ability
Active Publication Date: 2019-06-11
NINGBO JINYUANDONG PETROCHEM ENG TECH
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Problems solved by technology
When the spray dryer is working, people need to add water to the sulfur-containing waste to increase the fluidity of the sulfur-containing waste, so that it is convenient to transport the sulfur-containing waste to the spray dryer for drying, which leads to the utilization of sulfur-containing waste acid The energy consumption of the method is high, and the heat exchange efficiency of the waste heat recovery system is low, and the dust removal effect is poor, which needs to be improved
Method used
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Embodiment 1
[0029] A method for making sulphuric acid using sulfur-containing materials, which is characterized by including the following processes: pretreatment process, incineration process, waste heat recovery process, purification process, drying process, conversion process, absorption process, and tail gas treatment process;
[0030] The pretreatment process includes the following steps: the mixed salt obtained after concentration of the desulfurization waste liquid and the sulfur paste obtained by centrifugation in a horizontal centrifuge are fed into a dryer for drying, and the moisture content of the sulfur-containing material after drying is less than 5%.
[0031] Reference figure 1 with 2 , The dryer includes a cylindrical hollow jacket 1 with a heating medium. The hollow jacket 1 is provided with a rotating shaft 2, and the axis of the rotating shaft 2 and the axis of the hollow jacket 1 are collinear. An accommodating cavity 3 is provided inside the rotating shaft 2, and the accom...
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The invention discloses a method for preparing acid by utilizing sulfur-containing materials. The method comprises a pretreatment process, an incineration process, a waste heat recovery process, a purifying process, a drying process, a conversion process, an absorbing process and a tail gas treatment process. A dryer is used for drying in the pretreatment process; an incinerator is used for performing the incineration process; a waste heat boiler is used for recycling waste heat in the waste heat recovery process. The method disclosed by the invention has the beneficial effects that the technology for preparing sulfuric acid is capable of saving energy consumption, the dust generated in the preparation process is basically eliminated, hot water can be generated and supplied to other equipment and the method meets modern society requirements.
Description
Technical field [0001] The invention relates to the treatment of desulfurization wastes, in particular to a method for making acid by using sulfur-containing materials. Background technique [0002] The Chinese patent with publication number CN102381687A discloses a method for making acid by using sulfur-containing waste and a wet desulfurization process containing the method. The method for making acid by using sulfur-containing waste includes a drying step, an incineration step, a purification step, a catalytic conversion step, and an acid-making step. The drying step is to send the sulfur-containing waste to a drying device to be dried into a powdered sulfur-containing material; an incineration step It is to send the powdery sulfur-containing material into the incinerator to be fully burned to produce SO 2 The purification step is to send the mixed gas to the purification equipment for dust removal and / or impurity removal; the catalytic conversion step is to remove the purifie...
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IPC IPC(8): C01B17/74B01D45/02B01D45/06
CPCB01D45/02B01D45/06C01B17/74Y02P20/10Y02P20/129
Inventor 赵传军项裕桥
Owner NINGBO JINYUANDONG PETROCHEM ENG TECH