Preparation method of sulfur dioxide industrial raw material gas

A sulfur dioxide and raw gas technology, applied in chemical instruments and methods, inorganic chemistry, sulfur compounds, etc., can solve the problems of low concentration of raw gas, difficulty in market competition, loss of economic value, etc., and achieve high decomposition reaction efficiency and low sulfur loss , considerable economic and social benefits

Active Publication Date: 2014-04-09
CHONGQING SANSHENG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low concentration of raw material gas produced with various types of gypsum as raw material, SO 2 gas (SO 2 The highest concentration is only 7-9%) when preparing other downstream products, it loses its economic value and is difficult to participate in market competition. Therefore, no one in the industry uses gypsum as raw material to industrially produce gaseous sulfur dioxide

Method used

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  • Preparation method of sulfur dioxide industrial raw material gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of sulfur dioxide industrial raw material gas, carry out according to the following steps:

[0026] 1. Raw material equipment: 85% gypsum, 6% coke, 3% yellow sand, 4% shale, and 2% iron powder are used as raw materials by mass percentage, and the gypsum is CaSO 4 Gypsum and coke with content ≥ 85% are coke with fixed carbon ≥ 75%, gypsum particle size is 0.08㎜ sieve residue is 18%, coke particle size is 0.2㎜ sieve residue < 20%; the ratio of each material is measured by belt scale To achieve this, the addition of raw material is added with a metering screw, so that the feeding is uniform and smooth, no material breakage occurs, the metering is accurate, and the adjustment is free;

[0027] 2. Calcination reaction in the rotary kiln: Add the raw material prepared above into the rotary kiln for calcination, and control the kiln speed of the rotary kiln at 1.5 rpm; The gun enters to ensure that the coal powder enters the kiln evenly and burns....

Embodiment 2

[0049] A kind of preparation method of sulfur dioxide industrial raw material gas, carry out according to the following steps:

[0050] 1. Raw material equipment: 83% gypsum, 8% coke, 5% yellow sand, 2% shale, and 2% iron powder are used as raw materials in mass percentages. For ≥75% coke, the gypsum particle size is 0.08㎜ and the sieve residue is 15%, and the coke particle size is 0.2㎜ and the sieve residue is <20%. To achieve uniform and smooth feeding, no material breakage, accurate measurement, and free adjustment;

[0051] 2. Calcination reaction in the rotary kiln: add the raw material prepared above into the rotary kiln for calcination, control the kiln speed of the rotary kiln at 2.5 rpm; The gun enters to ensure that the coal powder enters the kiln evenly and burns. The primary air volume accounts for 20% of the total air volume. The secondary air comes from the hot air discharged from the kiln air beam grate cooler after cooling the clinker, and the secondary air vo...

Embodiment 3

[0057] A kind of preparation method of sulfur dioxide industrial raw material gas, carry out according to the following steps:

[0058] 1. Raw materials: 88% gypsum, 4% coke, 3% yellow sand, 4% shale, and 1% iron powder are used as raw materials by mass percentage, and the gypsum is CaSO 4 Gypsum and coke with a content of ≥85% are cokes with a fixed carbon content of ≥75%. The sieve residue of gypsum with a particle size of 0.08mm is 20%, and the sieve residue of coke with a particle size of 0.2mm is less than 20%. To achieve this, the addition of raw material is added with a metering screw, so that the feeding is uniform and smooth, no material breakage occurs, the metering is accurate, and the adjustment is free;

[0059] 2. Calcination reaction in the rotary kiln: add the raw material prepared above into the rotary kiln for calcination, control the kiln speed of the rotary kiln at 2.0 rpm; The gun enters to ensure that the coal powder enters the kiln evenly and burns. The...

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Abstract

The invention relates to a preparation method of sulfur dioxide industrial raw material gas. The preparation method comprises the step of taking gypsum and coke as raw materials and leading the raw materials to be calcined in a rotary kiln for reaction, wherein the content of O2 in the tail gas of the rotary kiln is controlled within the range of 0.05-1.0%, and the content of CO is controlled to be less than 0.4% based on mass percent. The mass concentration of the sulfur dioxide gas prepared by the preparation method reaches 10-13%, thus completely being in accordance with the requirement for the sulfur dioxide industrial raw material gas; meanwhile, in the preparation process, the heat is recovered and comprehensively utilized, so that energy conservation and emission reduction can be realized in the whole process; and furthermore, the obtained kiln gas is used as the sulfur dioxide industrial raw material gas and can be used for producing various down-stream products, so that considerable economic benefit and social benefit can be obtained.

Description

technical field [0001] The invention relates to a kind of gypsum as raw material to produce industrial SO 2 The gas production method belongs to the field of chemical technology and comprehensive utilization of industrial solid waste resources. Background technique [0002] Traditional industrial SO 2 The gas production method is to use sulfur incineration or use pyrite as raw material, and the reaction produces SO 2 gas, the resulting SO 2 Industrial gas (mass percentage concentration of 10% to 12%) is used as raw material for the production of liquid sulfur dioxide, sodium pyrosulfite and other products; however, my country's sulfur and pyrite resources are scarce, and a large amount of sulfur is required to be imported every year to meet the needs of sulfuric acid and liquid SO 2 production. my country's natural gypsum and various chemical gypsum (phosphogypsum, desulfurization gypsum, etc.) resources are very rich, especially the accumulation of chemical gypsum, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/50
Inventor 杨兴志潘先文
Owner CHONGQING SANSHENG IND CO LTD
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