Semi-dry desulfurization process calcium-based desulfurizing agent and preparation method thereof

A technology for semi-dry desulfurization and desulfurization agent, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of difficult promotion, complicated preparation process, and high price of desulfurization agent, and achieves high economic and social Effectiveness, high stability, high digestive activity and effect of desulfurization efficiency

Active Publication Date: 2016-09-07
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that the amount of sludge is only 2.5-10%, which cannot fundamentally solve the problem of expensive desulfurizers
200810115043.9 A desulfurizing agent for flue gas desulfurization and its preparation method "in which blast furnace slag and lime are used to prepare desulfurizing agent, the desulfurizing efficiency is high, but the preparation process is complicated, pulping and high-temperature stirring are required for activation, and it is difficult to popularize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A calcium-based desulfurizer for a semi-dry desulfurization process, the preparation method of which comprises the steps of:

[0029] 1) Raw materials are weighed: the mass percentages of each raw material are: quicklime powder 9.5%, lime kiln dust removal powder 15% and lime kiln sieve material 75%, admixture (calcium chloride) 0.5%;

[0030] 2) Mix the weighed raw materials evenly, so that the gradation relationship of particle size d in the obtained mixture is controlled at: d<0.1mm 15-25%, 0.2≤d<0.3mm 25-45%, 0.8≤d<1mm 30% to 60%, wherein each particle size range is based on the mass percentage of calcium oxide remaining in each sieve; that is, the calcium-based desulfurizer for the semi-dry desulfurization process (wherein the content of calcium oxide in the calcium-based desulfurizer is 85.2%).

[0031] The obtained calcium-based desulfurizer is digested with water, and the concentration of the obtained slurry is controlled to be 18wt%, the initial water temperatu...

Embodiment 2

[0034] A calcium-based desulfurizer for a semi-dry desulfurization process, the preparation method of which comprises the steps of:

[0035] 1) Raw materials are weighed: the mass percentages of each raw material are: quicklime powder 14%, lime kiln dust removal powder 10% and lime kiln sieve material 75%, admixture (calcium chloride) 1%;

[0036] 2) Mix the weighed raw materials evenly, so that the gradation relationship of particle size d in the obtained mixture is controlled at: 0.1≤d<0.2mm 15-25%, 0.3≤d<0.4mm 25-45%, 0.8≤d <1mm 30-60%, wherein each particle size range is calculated by the mass percentage of calcium oxide remaining in each sieve; that is, the calcium-based desulfurizer for the semi-dry desulfurization process is obtained. (wherein the content of calcium oxide in the calcium-based desulfurizer is 83.4%).

[0037]The obtained calcium-based desulfurizer is digested with water, the concentration of the obtained slurry is controlled to 20wt%, the initial water ...

Embodiment 3

[0040] A calcium-based desulfurizer for a semi-dry desulfurization process, the preparation method of which comprises the steps of:

[0041] 1) Raw materials are weighed: the mass percentages of each raw material are: quicklime powder 20%, lime kiln dust removal powder 18% and lime kiln sieve material 60%, admixture (calcium fluoride) 2%;

[0042] 2) Mix the weighed raw materials evenly, so that the gradation relationship of particle size d in the obtained mixture is controlled at: 0≤d<0.1mm 15-25%, 0.5≤d<0.8mm 25-45%, 1≤d <2mm 30-60%, wherein each particle size range is calculated by the mass percentage of calcium oxide remaining in each sieve; that is, the calcium-based desulfurizer for the semi-dry desulfurization process is obtained. (wherein the content of calcium oxide in the calcium-based desulfurizer is 89.3%).

[0043] The obtained calcium-based desulfurizer is digested with water, the concentration of the obtained slurry is controlled to be 22wt%, the initial water ...

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Abstract

The invention discloses a semi-dry desulfurization process calcium-based desulfurizing agent and a preparation method thereof. The semi-dry desulfurization process calcium-based desulfurizing agent comprises the following components in percentage by weight: 8-20 percent of quicklime powder, 10-20 percent of lime kiln dust-removing powder, 60-80 percent of lime kiln sieve residue and 0.5-2 percent of admixture. The semi-dry desulfurization process calcium-based desulfurizing agent takes the lime kiln dust-removing powder, the lime kiln sieve residue and other industrial wastes as main raw materials, and through performing grading design on the particle sizes of the raw materials, the problems of high cost of the semi-dry desulfurization process calcium-based desulfurizing agent and resource utilization of wastes produced in the production of a lime kiln can be effectively solved; the prepared semi-dry desulfurization process calcium-based desulfurizing agent has higher digestive activity, desulfurization efficiency and stability and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and environmental protection, and specifically relates to a calcium-based desulfurizer for a semi-dry desulfurization process and a preparation method thereof. Background technique [0002] Traditional electric power and sintering enterprises produce a large amount of SO in the production process 2 Smoke, causing serious pollution to the atmosphere. According to whether water is added in the desulfurization process and the form of by-products after desulfurization, the flue gas desulfurization technology is divided into dry method, semi-dry method and wet method. The dry desulfurization efficiency is low, and the wet desulfurization efficiency is high, but the corrosion problem is prominent. The semi-dry method is welcomed by users for its advantages of no corrosion, no waste water and relatively high desulfurization efficiency. With the deteriorating air quality, the national 2 More stringe...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/50
Inventor 卢丽君薛改凤李丽坤莫亚平康凌晨张垒王丽娜付金安
Owner 武汉钢铁有限公司
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