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Acid production process

A process and acid mist technology, applied in the field of chemical preparation, can solve the problems of incomplete reaction, easy pollution, large floor area, etc., and achieve the effect of complete chemical reaction, safe turning waste into treasure, and solving environmental problems

Active Publication Date: 2019-12-20
骆驼集团(安徽)再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these traditional sulfuric acid production processes are complicated, the heat recovery rate is low, and at the same time, a large amount of waste liquid and burnt will be generated, which seriously pollutes the environment
Moreover, there are few reports on the combined acid production process of different raw materials for acid production. Even if it exists, it is an acid production process with low acid production efficiency and poor effect. For example, the acid production technology using waste sulfuric acid and hydrogen sulfide acid gas as raw materials has been used in practice. However, there are defects such as insufficient atomization mixing, incomplete reaction, easy blockage of follow-up equipment, and easy production of sublimated sulfur.
[0004] Sulfur-containing ores and sulfur-containing coal contain sulfur elements. After burning, they will produce sulfur dioxide gas with a pungent smell and easy pollution of the atmosphere. Although the concentration of sulfur dioxide in the flue gas produced by the combustion of these substances is high, it cannot reach the concentration required for acid production. , need desulfurization treatment
At present, the general desulfurization technology adopts the one-stage desulfurization method, which basically fails to meet the required emission standards. Only by using multi-stage desulfurization can the relevant requirements be met.
However, multi-stage desulfurization not only increases the cost of flue gas treatment, but also requires a larger floor area, causing a great burden on enterprises

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of acid production process is characterized in that, comprises the steps:

[0037] Step S1, waste acid treatment: the waste sulfuric acid by-product of the refinery is atomized to form acid mist by using a combination of high-pressure pump conveying mechanical atomization and compressed air assisted atomization; the quality of the waste sulfuric acid is 100%. The sub-concentration is 80%; the particle size of the acid mist is 60um.

[0038] Step S2, treatment of sulfur-containing minerals: pulverize the sulfur-containing minerals, then use a detergent to clean them in an ultrasonic cleaner at 40-50°C for 1-2 hours, rinse them with water, and dry them at 80°C until they reach a constant weight; The sulfur-containing mineral is pyrite;

[0039] Step S3, preparation of mixed furnace gas: the sulfur-containing minerals produced in step S2 are oxidized and burned to obtain furnace gas, which is cooled and dusted in turn, and then passed through an empty tower, a pack...

Embodiment 2

[0047] A kind of acid production process is characterized in that, comprises the steps:

[0048] Step S1, waste acid treatment: the waste sulfuric acid by-product of the refinery is atomized to form acid mist by using a combination of high-pressure pump conveying mechanical atomization and compressed air assisted atomization;

[0049] Step S2, treatment of sulfur-containing minerals: pulverize the sulfur-containing minerals, and then use a detergent to clean them in an ultrasonic cleaner at 42°C for 1.2 hours, rinse them with water, and dry them at 83°C until they reach a constant weight;

[0050] Step S3, preparation of mixed furnace gas: the sulfur-containing minerals produced in step S2 are oxidized and burned to obtain furnace gas, which is cooled and dusted in turn, and then passed through an empty tower, a packed tower, a dynamic wave scrubber and an electric furnace gas in sequence. Demister, purify high-concentration sulfur-containing gas; and mix the obtained high-con...

Embodiment 3

[0062] A kind of acid production process is characterized in that, comprises the steps:

[0063] Step S1, waste acid treatment: the waste sulfuric acid by-product of the refinery is atomized to form acid mist by using a combination of high-pressure pump conveying mechanical atomization and compressed air assisted atomization;

[0064] Step S2, treatment of sulfur-containing minerals: pulverize the sulfur-containing minerals, and then use a detergent to clean them in an ultrasonic cleaner at 45°C for 1.5 hours, rinse them with water, and dry them at 85°C until they reach a constant weight;

[0065] Step S3, preparation of mixed furnace gas: the sulfur-containing minerals produced in step S2 are oxidized and burned to obtain furnace gas, which is cooled and dusted in turn, and then passed through an empty tower, a packed tower, a dynamic wave scrubber and an electric furnace gas in sequence. Demister, purify high-concentration sulfur-containing gas; and mix the obtained high-con...

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PUM

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Abstract

The invention discloses an acid production process, which comprises: S1, waste acid treatment, S2, sulfur-containing mineral treatment, S3, preparation of mixed furnace gas, S4, incineration, S5, preparation of SO3 furnace gas, and S6, preparation of finished product acid. According to the invention, the acid production process has characteristics of simpleness, short flow, convenient operation, low power consumption during production, efficient and quick comprehensive recycling of sulfur-containing flue gas of multi-source acid making raw materials, no generation of toxic and harmful substances during production, high production efficiency and high yield, and is suitable for large-scale continuous production; and during the preparation, the device investment and the operation cost can begreatly reduced, and the economic value, the social value and the ecological value are high.

Description

technical field [0001] The invention relates to the technical field of chemical preparation, in particular to a sulfuric acid production process. Background technique [0002] my country is a large agricultural country. The huge demand for fertilizers in agricultural production has directly led to the vigorous development of my country's sulfuric acid industry. At the same time, sulfuric acid is also widely used in the chemical industry. In the past ten years, the output of sulfuric acid in my country has increased year by year, providing an important raw material guarantee for the development of the national economy. However, behind the rapid development, there are many problems. For many years, the discharge of acidic wastewater and harmful waste residues has also caused serious environmental problems that need to be solved urgently. The production of sulfuric acid has gradually shifted to the direction of low pollution and high efficiency. [0003] Sulfuric acid is an im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/76C01B17/52C01B17/58C11D1/92C11D3/37C07H1/00C07H3/08B01J23/20B01D53/86B01D53/50
CPCB01D53/8609B01D2258/0283B01J23/002B01J23/20B01J37/0009B01J2523/00C01B17/52C01B17/58C01B17/765C07H1/00C07H3/08C11D1/92C11D3/222B01J2523/22B01J2523/3712B01J2523/48B01J2523/56Y02P20/129
Inventor 贾磊王脐君曹睿蔡以辉王振飞
Owner 骆驼集团(安徽)再生资源有限公司
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