A process for making acid by combined incineration of waste sulfuric acid and hydrogen sulfide and the incinerator used

Abstract

The invention relates to a technology for making acid by combined incineration of waste sulfuric acid and hydrogen sulfide, and a used incinerator. The technology comprises the following steps: (1) atomizing the waste sulfuric acid, with concentration of greater than or equal to 75%, as a by-product in an oil refinery to form acid mist by combining high pressure pump conveying mechanical atomization with compressed air auxiliary atomization, wherein the grain diameter is smaller than or equal to 80 microns; (2) completely mixing hydrogen sulfide gas, with concentration of 0 to 50%, as the by-product in the oil refinery with hot air in a cyclone air inlet to product mixed gas; and (3) spraying the acid mist into the incinerator by using a waste acid spray gun, meanwhile spraying the mixed gas of hydrogen sulfide gas and hot air into the incinerator by a hydrogen sulfide spray gun and carrying out incineration, pyrolysis and reduction reaction to generate SO2 burner gas, wherein the SO2 burner gas enters an acid making system after the heat is recycled through a heat recovery boiler. During the reaction, the grain diameter of the acid mist is smaller than or equal to 80 microns, and the acid mist is introduced into the incinerator at the same time, so that various reactions can be performed completely and heat loss is reduced furthest at the same time, and produced products meet the requirement of the subsequent acid making technology.

Description

technical field [0001] The invention relates to an acid production process for combined incineration of waste sulfuric acid and hydrogen sulfide and an incinerator used, belonging to the technical field of chemical environmental protection. Background technique [0002] There have been reports of practical application of acid production technology using waste sulfuric acid and hydrogen sulfide acid gas as raw materials, but there are also defects such as insufficient atomization and mixing, incomplete reaction, easy blockage of subsequent equipment, and easy production of sublimated sulfur. However, there is no report on the process of co-incinerating waste sulfuric acid and hydrogen sulfide to produce acid. In the process of combined incineration of waste sulfuric acid and hydrogen sulfide to produce acid, the heat generated by hydrogen sulfide incineration is used to maintain the temperature of the incinerator as high as 950 ° C ~ 1180 ° C, and the incineration, cracking a...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a process for producing acid by combined incineration of waste sulfuric acid and hydrogen sulfide and the incinerator used to overcome the defects in the prior art such as uneven atomization of waste sulfuric acid and uneven mixing with hydrogen sulfide Insufficient reaction, generation of sublimated sulfur, and easy blockage of follow-up equipment

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