Production technology of sulphuric acid

A sulfuric acid production and process technology, applied in the field of chemical production technology, can solve the problems of shortening the service life of equipment, low utilization rate of low-temperature waste heat, unclear temperature control, etc. The effect of using time

Inactive Publication Date: 2015-01-21
中山市鸿程科研技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process uses sulfur as a heat source, and adopts boiling roasting dry method to produce iron oxide red products. The roasted flue gas is processed into concentrated sulfuric acid products required by the market, which not only eliminates environmental pollution, but also makes full use of sulfur resources. It is beneficial, with significant economic, environmental and social benefit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1:

[0018] A sulfuric acid production process of this embodiment is characterized in that the process steps are as follows:

[0019] (1) Crushing and screening: select pyrite from the ore for crushing, and then select 4~5mm small pyrite particles through screening;

[0020] (2) Roasting process: the above-mentioned small pyrite particles are sent to the boiling roaster, mixed with air for roasting reaction, the temperature is controlled at 880℃, and the furnace gas containing sulfur dioxide is discharged from the top of the boiling roaster, and the slag is discharged through the slag discharge port discharge;

[0021] (3) Purification process: The furnace gas is cooled to about 350℃ in the waste heat boiler, and the dust in the furnace gas is removed by the cyclone dust collector, and then enters the purification system to remove dust and cool down. At the same time, the sulfuric acid mist and solid particles in the furnace gas are removed and discharged The temperatu...

Example Embodiment

[0026] Example 2 : The rest is the same as in Example 1, except that the temperature of the boiling roaster in step (2) is controlled at 850°C, the concentration of concentrated sulfuric acid desiccant in step (5) is 93%, and in step (7), The intermediate absorption tower and the final absorption tower are provided with an acid circulation system.

Example Embodiment

[0027] Example 3: The rest is the same as in Example 1, except that in step (2), the temperature of the boiling roaster is controlled at 950°C. In step (3), the purification system consists of a venturi tube, a foam tower and an electric demister Composition, the concentration of concentrated sulfuric acid desiccant in step (5) is 94%.

[0028] Example 1 Example 2 Example 3 Pyrite utilization 57% 54% 60% Sulfuric acid production as a percentage of sulfur dioxide 95% 98% 94.5%

[0029]

[0030] Through the above three examples, the three sets of data in the above table show that when the temperature is controlled at 950℃, the utilization rate of pyrite is the highest, and when the concentration of the concentrated sulfuric acid desiccant is 93%, the sulfuric acid output is the best. Conducive to the production of sulfuric acid.

[0031] The invention completes the preparation of sulfuric acid through seven steps of crushing and screening, roasting, purification, reaction hea...

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PUM

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Abstract

The invention discloses a production technology of sulphuric acid. The production technology of sulphuric acid comprises the following technological steps: (1) smashing and screening, namely selecting iron pyrite from ore and smashing, sieving and selecting appropriate iron pyrite granules with the granularity of 4-5mm; (2) roasting; (3) purifying; (4) recycling reaction heat, wherein a steam evaporation pipe bundle is arranged in a waste heat boiler, reaction heat obtained during furnace gas cooling is conveyed to a water circulation system or other thermodynamic systems through the steam evaporation pipe bundle; (5) drying; (6) carrying out conversion, wherein gas enters a conversion system through a sulphur dioxide blower, and sulphur dioxide in raw furnace gas is oxidized into sulphur trioxide gas in the presence of a vanadium catalyst; and (7) absorbing. The production technology of sulphuric acid is reasonable and simple in technology, a technological process is greatly shortened, raw materials are fully utilized, less pollutant is discharged, most importantly recovery rate of low temperature waste heat in the sulphuric acid making industry is increased, and waste of energy resources and the like is avoided, so that the production technology of sulphuric acid is applicable to popularization in the sulphuric acid production industry.

Description

technical field [0001] The production technology of the chemical medicine that the present invention relates to, particularly relates to a kind of sulfuric acid production technology. Background technique [0002] Sulfuric acid has a wide range of uses, such as chemical fertilizers, explosives, pesticides and medicines. Sulfuric acid is needed in China. As a large country of sulfuric acid, the production and consumption of sulfuric acid continue to grow. As a technologically strong country, there is a great potential for recovery and utilization of waste heat in pyrite acid production industry, but there is no effective and feasible technology and equipment to recover this part of energy in the current sulfuric acid production process. The application number is CN200810232687.6, which discloses a sulfuric acid production process. It uses iron fine powder (or iron mud) and sulfur as the main raw materials, mixes iron fine powder (or iron mud) and sulfur in an appropriate prop...

Claims

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Application Information

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IPC IPC(8): C01B17/76
CPCY02P20/129C01B17/7655
Inventor 李丽娟王建武
Owner 中山市鸿程科研技术服务有限公司
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