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Composite sulfur-fixing agent and application thereof

A technology of sulfur fixation agent and mixture, which is applied in flue gas treatment. In the field of desulfurization, it can solve the problems of no desulfurization catalytic effect and high cost of composite desulfurizer, achieve good sulfur fixation effect, increase desulfurization reaction time, and improve desulfurization efficiency.

Inactive Publication Date: 2015-04-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the traditional simple calcium base without desulfurization catalytic effect and the high cost of conventional composite desulfurizers, the composite desulfurizer formed by adding copper slag to the calcium base in the present invention can effectively meet the problems existing in the current desulfurizers. The composite solid desulfurizer of the present invention The composition and mass percentage of sulfur agent are: copper slag 5%~45%, calcium base 55%~95%

Method used

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  • Composite sulfur-fixing agent and application thereof
  • Composite sulfur-fixing agent and application thereof
  • Composite sulfur-fixing agent and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: The composition and mass percentage of the composite sulfur-fixing agent are: 5% copper slag (TZ), 95% calcium carbonate; 10% copper slag, 90% calcium carbonate; 20% copper slag, 80% calcium carbonate. Wherein the copper slag is the industrial waste slag separated from the smelting and depletion electric furnace of the copper mine of a copper company in Yunnan.

[0019] Table 1: Chemical composition of copper slag

[0020] .

[0021] Table 2: Content of main minerals in copper slag

[0022] .

[0023] (1) The property analysis of calcium carbonate / copper slag composite sulfur fixative is as follows:

[0024] Through the XRD analysis of the calcium carbonate / copper slag composite sulfur fixative, it can be known that, as figure 1 It is shown that pyrolysis of composite sulfur fixation agent can release substances that are beneficial to catalyze sulfur fixation.

[0025] When adding copper slag in different proportions, CaCO 3 The relationship between...

Embodiment 2

[0041] Example 2: After uniformly mixing different proportions of copper slag and calcium oxide, carry out wet, semi-dry, and dry sulfur fixation tests on the test bench, wherein the volume fraction of each component of the simulated flue gas, the laboratory simulated flue gas Air intake rate, detection instrument are with embodiment 1, and experimental result is as table 7:

[0042] Table 7: When the amount of copper slag added is 15%, 25%, and 30%, the sulfur-fixing efficiency of calcium oxide / copper slag composite sulfur-fixing agent

[0043] .

Embodiment 3

[0044] Embodiment 3: After uniformly mixing copper slag and calcium hydroxide in different proportions, wet, semi-dry, and dry sulfur fixation tests were carried out on the test bench, wherein the volume fraction of each component of the simulated flue gas, the laboratory simulated smoke The air intake rate and detection instruments are the same as above, and the experimental results are shown in Table 8:

[0045] Table 8: When the amount of copper slag added is 35%, 40%, and 45%, the sulfur-fixing efficiency of calcium hydroxide / copper slag composite sulfur-fixing agent

[0046] .

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Abstract

The invention discloses a composite sulfur-fixing agent which comprises the following components in percentage by mass: 5-45 percent of copper slag and 55-95 percent of calcium base. The composite sulfur-fixing agent is mainly applied to flue gas desulfurization in the industries such as coal-fired power plants and metallurgy. When the calcium-based / copper slag composite sulfur-fixing agent is at the temperature of 800-1000 DEG C, the specific surface area of the agent is increased, so that the contact area between SO2 in flue gas and the calcium-based / copper slag composite sulfur-fixing agent is increased. According to the determining of the efficiency of the calcium-based / copper slag composite sulfur-fixing agent on an experimental platform, the result shows that the sulfur-fixing rate ranges of the calcium-based / copper slag composite sulfur-fixing agent are that the sulfur-fixing rate is between 85.98 percent and 96.69 percent when a wet process is adopted, the sulfur-fixing rate is between 57.28 percent and 83.84 percent when a semidry method is adopted, and the sulfur-fixing rate is between 45.00 percent and 63.99 percent when a dry method is adopted. Because the copper slag is added into the sulfur-fixing agent, desulfurization reaction is carried out in advance, the desulfurization reaction time is prolonged, SO2 is removed, the energy consumption is reduced, the cost of the sulfur-fixing agent is reduced, and the economic benefits are obvious. The invention aims at providing a method for reutilizing the copper slag discarded after copper smelting.

Description

technical field [0001] The invention relates to a compound sulfur-fixing agent suitable for treating sulfur-containing flue gas in industrial production, especially suitable for treating flue gas with high sulfur oxide content. Background technique [0002] At present, the sulfur-fixing agents used for flue gas sulfur-fixing at home and abroad are mainly calcium-based. This kind of flue gas-based sulfur-fixing agent based on pure calcium has a narrow range of sulfur-fixing temperatures, low utilization of sulfur-fixing agents, and relatively low cost. High-grade features, while the calcium-based sulfur fixer only has desulfurization effect and does not have catalytic effect. With the development of science and technology, researchers continue to explore and summarize in the production process, and have developed many composite sulfur-fixing agents with good sulfur-fixing effect and catalytic effect. These composite sulfur-fixing agents only combine calcium-based and It is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50
Inventor 李瑛颜小禹张恒赖立践陈捷李范范董委
Owner KUNMING UNIV OF SCI & TECH
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