Equipment for preparing sulfuric acid

An equipment and technology for sulfuric acid, applied in the field of equipment for preparing sulfuric acid, can solve the problems of large fluctuation, the sulfuric acid needs to be improved, and the sulfuric acid cannot be satisfied, and the effect of low cost is achieved.

Inactive Publication Date: 2013-11-27
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

However, due to the low concentration of sulfur dioxide in the flue gas (large fluctuations), it cannot meet the needs of the contact method for the production of sulfuric acid
[0003] Thus, the current means for preparing sulfuric acid still needs to be improved

Method used

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  • Equipment for preparing sulfuric acid
  • Equipment for preparing sulfuric acid
  • Equipment for preparing sulfuric acid

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Embodiment

[0070] refer to Figure 4 , the following description adopts the equipment for preparing sulfuric acid of the present invention to prepare sulfuric acid.

[0071] 1. The composition of the high-concentration sulfur dioxide flue gas used to prepare sulfuric acid is as shown in table 1:

[0072] Table 1

[0073]

[0074]

[0075] It can be seen from Table 1 that SO 2 The concentration fluctuates in a large range, specifically, the SO in the oxidation period 2 The highest content can reach 7.65%, and the SO in the slagging period 2 The lowest content is only 0.03%. The content of the oxidation period is 7.65%, and the reduction period is SO 2 The acid system with a content of 3.5% can be produced normally; during the reduction period, diSO 2 The content is 1.07%, SO 2 Content 0.03%. Therefore, the conversion system of acid production cannot be self-thermally balanced, and the normal production of the conversion system needs to be supplemented by heat and other means...

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Abstract

The invention provides equipment for preparing sulfuric acid, which comprises a high-concentration flue gas supply device, a sulfur dioxide transformation device, a sulfur trioxide absorbing device, an absorbing device, a desorbing device and a sulfur dioxide liquefying device, connected in sequence, wherein a sulfur dioxide absorbing agent is arranged in the absorbing device to absorb sulfur dioxide in high-concentration flue gas; the desorbing device is used for releasing sulfur dioxide through rising the temperature; the sulfur dioxide transformation device is used for transforming sulfur dioxide into sulfur trioxide; the sulfur trioxide absorbing device is used for absorbing sulfur trioxide with sulfuric acid to obtain sulfuric acid and acid making exhaust gas containing sulfur dioxide; the sulfur dioxide liquefying device is used for liquefying gaseous sulfur dioxide. The flue gas purification equipment can provide sulfur dioxide enriched or recovered in flue gas, and finally obtain sulfuric acid or liquid sulfur dioxide.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular, the invention relates to a device for preparing sulfuric acid. Background technique [0002] Smoke is a mixture of gas and smoke and is the main cause of air pollution in residential areas. The composition of flue gas is very complex, including sulfur dioxide, carbon monoxide, carbon dioxide and so on. The pollution of flue gas to the environment is the compound pollution of various poisons. The sulfur dioxide in the flue gas can be converted into sulfur trioxide to absorb sulfuric acid to prepare sulfuric acid. However, due to the low concentration of sulfur dioxide in the flue gas (large fluctuations), it cannot meet the needs of the contact method for the preparation of sulfuric acid. [0003] Thus, the current means for preparing sulfuric acid still needs to be improved. Contents of the invention [0004] The present invention aims at solving at least one of the above-men...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18C01B17/76
Inventor 高飞岳焕玲王鈜艳刘一鸣魏甲明董四禄
Owner CHINA ENFI ENGINEERING CORPORATION
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