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Method for treating waste in process of producing sulfuric acid from calcium sulfate

A treatment method and waste technology, applied in the direction of sulfur compounds, separation methods, chemical instruments and methods, etc., can solve the problems of difficult and efficient treatment of sulfur dioxide, and achieve the effect of reducing the impact

Active Publication Date: 2015-07-08
XIANGFU NEW BUILDING MATERIAL HUNAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiency that the waste sulfur dioxide in the process of producing sulfuric acid from calcium sulfate is not easy to be efficiently treated, and to provide a waste treatment method for producing sulfuric acid from calcium sulfate with high treatment efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment includes the following steps:

[0020] (1) Waste SO from the absorption tower 2 Into the spiral tube made of inorganic ceramic material;

[0021] A reticular alum pentoxide catalyst is housed inside the spiral tube made of inorganic ceramic material;

[0022] The pitch-to-diameter ratio of the spiral tube made of inorganic ceramic material is 2:1, the length of the cooling section of the spiral tube made of inorganic ceramic material only accounts for 20% of the total length, and the cooling section is located at the end of the spiral tube made of inorganic ceramic material (with the The opposite end of the inlet), the temperature of the cooling section of the non-metallic spiral tube can be controlled at 0-10°C, and the other parts do not have forced cooling;

[0023] (2) At the same time, oxygen and water vapor are introduced into the spiral tube made of inorganic ceramic material. The volume ratio of sulfur dioxide, oxygen and water vapor is sulfur ...

Embodiment 2

[0028] This embodiment includes the following steps:

[0029] (1) Waste SO from the absorption tower 2 Into the spiral tube made of inorganic ceramic material;

[0030] A granular platinum catalyst is housed inside the spiral tube made of inorganic ceramic material;

[0031] The pitch-to-diameter ratio of the spiral tube made of inorganic ceramic material is 5:1, the length of the cooling section of the spiral tube made of inorganic ceramic material only accounts for 30% of the total length, and the cooling section is located at the end of the spiral tube made of inorganic ceramic material (with the The opposite end of the inlet), the temperature of the cooling section of the non-metallic spiral tube can be controlled at 0-10°C, and the other parts do not have forced cooling;

[0032] (2) At the same time, oxygen and water vapor are introduced into the spiral tube made of inorganic ceramic material. The volume ratio of sulfur dioxide, oxygen and water vapor is sulfur dioxide...

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Abstract

The invention relates to a method for treating waste in a process of producing sulfuric acid from calcium sulfate, which comprises the following steps: (1) introducing waste SO2 from an absorption tower into a non-metal spiral pipe filled with a catalyst; (2) simultaneously introducing oxygen and vapor into the non-metal spiral pipe; (3) meanwhile, applying a strong electric field, of which the intensity is 2*10<6>-2*10<6>N / C, to the outside of the spiral pipe, wherein the introduced vapor and oxygen are processed into reinforced OH- free radical on the molecular level so as to directly convert SO2 into vaporous H2SO4 liquid drops; and (4) meanwhile, controlling the temperature of the cooling section of the spiral pipe at 0-10 DEG C, so that the generated sulfuric acid solution is condensed and refluxed. The reinforcing electric field and catalyst ionization are utilized to catalyze the absorption of the waste SO2 in the process of producing sulfuric acid from calcium sulfate, so the absorptivity is up to 99.9%, thereby greatly reducing the influence of free discharge of waste on the surrounding environment.

Description

technical field [0001] The invention relates to a waste treatment method, in particular to a waste treatment method for producing sulfuric acid from calcium sulfate. Background technique [0002] During the preparation of conventional sulfuric acid, a lot of waste will be generated, mainly solid residues, harmful SO 2 Wait for gas. The solid residues are mostly common inorganic oxides, which are easier to recycle and will not cause too much harm to the environment, but SO 2 Arbitrary discharge of harmful gases will cause great harm to the environment and affect the living environment of human beings. For calcium sulfate production of sulfuric acid waste SO 2 Gas treatment generally adopts the process of two rotations and two suctions, SO 2 The conversion rate of sulfuric acid is generally around 99.4%. Although the treatment efficiency is high, the output of sulfuric acid production is very large. On the whole, a large amount of harmful gases will be emitted into the atm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/76B01D53/50C01B17/74
Inventor 刘立文刘珍如宁爱民宁勇宁江天刘勇鲁纪鸣
Owner XIANGFU NEW BUILDING MATERIAL HUNAN