Technology for making acid by combined incineration of waste sulfuric acid and hydrogen sulfide and used incinerator

A hydrogen sulfide and waste sulfuric acid technology, applied in the field of incinerators, can solve problems such as uneven mixing with hydrogen sulfide, uneven atomization of waste sulfuric acid, easy blockage of equipment, etc., to achieve thorough chemical reaction, reliable performance, and good adaptability Effect

Active Publication Date: 2013-11-20
JIANGSU YONGJI CHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
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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

Method used

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  • Technology for making acid by combined incineration of waste sulfuric acid and hydrogen sulfide and used incinerator

Examples

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Embodiment 1

[0026] A process for making acid by co-incinerating waste sulfuric acid and hydrogen sulfide, comprising the following steps:

[0027] Step (1): The waste sulfuric acid with a by-product concentration of 75% in the refinery is atomized by a combination of high-pressure pump mechanical atomization and compressed air assisted atomization to form acid mist, and the particle size of the acid mist is 20~80um;

[0028] Step (2): Mix hydrogen sulfide gas with a concentration of 30% by-product of the refinery and hot air in the swirl air inlet to make a mixed gas of hydrogen sulfide gas and hot air;

[0029] Step (3): The acid mist is sprayed into the incinerator with a waste acid spray gun, and at the same time, the mixed gas of hydrogen sulfide gas and hot air is sprayed into the incinerator with a hydrogen sulfide spray gun for incineration, cracking and reduction reaction to generate SO 2 furnace gas, the SO 2 The furnace gas enters the acid system after recovering heat from the...

Embodiment 2

[0032] A process for making acid by co-incinerating waste sulfuric acid and hydrogen sulfide, comprising the following steps:

[0033] Step (1): The waste sulfuric acid with a by-product concentration of 85% in the refinery is atomized by a combination of high-pressure pump mechanical atomization and compressed air assisted atomization to form acid mist. The particle size of the acid mist is 10~50um;

[0034] Step (2): Mix hydrogen sulfide gas with a concentration of 35% by-product of the refinery and hot air in the swirl air inlet to fully make a mixed gas of hydrogen sulfide gas and hot air;

[0035] Step (3): The acid mist is sprayed into the incinerator with a waste acid spray gun, and at the same time, the mixed gas of hydrogen sulfide gas and hot air is sprayed into the incinerator with a hydrogen sulfide spray gun for incineration, cracking and reduction reaction to generate SO 2 furnace gas, the SO 2 The furnace gas enters the acid system after recovering heat from t...

Embodiment 3

[0038] A process for making acid by co-incinerating waste sulfuric acid and hydrogen sulfide, comprising the following steps:

[0039] Step (1): 30kt / a waste sulfuric acid with a by-product concentration of 95% in the refinery is atomized by a combination of high-pressure pump transport mechanical atomization and compressed air assisted atomization to form acid mist. Fog particle size 15 ~ 60um;

[0040] Step (2): 2000Nm of hydrogen sulfide gas with a concentration of 20% by-product in the refinery 3 / h is fully mixed with hot air in the swirling air inlet to make a mixed gas of hydrogen sulfide gas and hot air; the hot air is the high-temperature furnace gas after the waste heat boiler, and the air at normal temperature and pressure is indirectly heat-exchanged to 450 through a heat exchanger ℃~600℃

[0041] Step (3): The acid mist is sprayed into the incinerator with a waste acid spray gun, and at the same time, the mixed gas of hydrogen sulfide gas and hot air is sprayed ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74F23G7/00
CPCY02P20/10
Inventor 贾永季易东明师建华方锦根
Owner JIANGSU YONGJI CHEM EQUIP
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