CN100404108C - Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process - Google Patents
Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process Download PDFInfo
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- CN100404108C CN100404108C CNB2005101275996A CN200510127599A CN100404108C CN 100404108 C CN100404108 C CN 100404108C CN B2005101275996 A CNB2005101275996 A CN B2005101275996A CN 200510127599 A CN200510127599 A CN 200510127599A CN 100404108 C CN100404108 C CN 100404108C
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- Prior art keywords
- magnesium
- sulfur dioxide
- desulphurization
- sulfite
- magnesia
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 60
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 31
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000011777 magnesium Substances 0.000 title claims abstract description 19
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 19
- 239000006227 byproduct Substances 0.000 title claims abstract description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 title claims description 18
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000000047 product Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 235000011194 food seasoning agent Nutrition 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 abstract description 7
- 230000002745 absorbent Effects 0.000 abstract description 6
- 239000002250 absorbent Substances 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract 1
- 239000001117 sulphuric acid Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 238000006477 desulfuration reaction Methods 0.000 description 17
- 230000023556 desulfurization Effects 0.000 description 17
- 230000000694 effects Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
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- Treating Waste Gases (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a method for preparing a desulphurization agent-magnesium oxide and sulfur dioxide by utilizing a by-product magnesium sulfite of a magnesium desulphurization process. The present invention is characterized in that the method comprises the following process steps that (1) a byproduct, namely magnesium sulfite, obtained from a desulphurization system is dried and crushed until the particle diameter is less than 3mm; (2) the crushed magnesium sulfite is roasted continuously by keeping the temperature in a furnace of 700 DEG C to 90 DEG C; the materials are continuously resolved into sulfur dioxide and magnesium oxide, and the desulphurization agent-magnesium oxide powder and a furnace gas rich in sulfur dioxide are obtained; the furnace gas is compressed and bottled into sulfur dioxide products. The present invention has the advantages that the produced magnesium oxide can be cyclically utilized as a desulphurization absorbent so that the operation cost of a magnesium desulphurization process is reduced greatly; simultaneously, the generated sulfur dioxide can be used to produce sulphuric acid. The present invention perfects the recycle of the by-product generated by flue gas desulphurization, and is suitable for preparing the desulphurization agent-magnesium oxide and sulfur dioxide by utilizing the by-product magnesium sulfite generated after flue gas desulphurization of an industrial boiler.
Description
Technical field
The invention belongs to the method for producing desulfurizing agent magnesia and sulfur dioxide, particularly a kind of accessory substance magnesium sulfite of wet type magnesium method desulfurization that utilizes is produced desulfurization absorbent magnesia, generates the method for sulfur dioxide simultaneously.
Background technology
It is the country of main primary energy with coal that China is one, and in the long period from now on, power industry can not change based on the energy resource structure of coal, and thermal power plant generates electricity as main fuel with coal.The boiler of power plant discharged flue gas contains SO
2Flue dust and HCl, HF, SO
3Deng, very serious to the pollution of environment.Along with the increasing of China environmental protection dynamics, flue gas desulfurization technique is applied at home and develops.In recent years, magnesia has obtained promoting comparatively widely as a kind of new desulfurizing agent.Magnesium sulfite need be used to it as the accessory substance of magnesium method desulfurization, so that resource reclaims.
At present, the method for handling magnesium desulfurizing byproduct containing magnesium sulfite usually is to the desulfurization waste liquor aeration, makes magnesium sulfate fertilizer.The magnesian preparation method of desulfurization absorbent is to adopt giobertite to become light calcined magnesia 800 ℃ of-900 ℃ of roastings, pulverizes.The preparation method of sulfur dioxide is to adopt roasting sulphur or sulphur iron ore, generates sulfur dioxide.Be and adopt ore to produce,, environment is all had pollution at roasting and process of lapping.
Summary of the invention
The objective of the invention is, utilize the accessory substance magnesium sulfite of wet type magnesium method desulfurization to make raw material, generate sulfur dioxide, generate the desulfurization absorbent magnesia of magnesium method desulfurization simultaneously through roasting.Magnesium sulfite is sintered into magnesia between 700 ℃-900 ℃, and discharge sulfur dioxide, the magnesia of regeneration can store and be reused for desulfurization absorbent, and sulfur dioxide can be used to produce sulfuric acid, to improve the recycling of the waste liquid that is rich in magnesium sulfite that generates after the flue gas desulfurization.
Technical scheme of the present invention is that a kind of method of utilizing magnesium desulfurizing byproduct containing magnesium sulfite to produce desulfurizing agent magnesia and sulfur dioxide mainly comprises following processing step:
1. dry and broken, will be controlled in 8% by the water content of the next accessory substance magnesium sulfite of magnesium method desulphurization system, adopt the oven dry of natural seasoning or roller drier, with disintegrating apparatus magnesium sulfite is crushed to particle diameter 3mm,
2. roasting, magnesium sulfite after the fragmentation is mixed with an amount of reducing agent coke, send in the fluidizing reactor continuously, fluidizing reactor keeps 700 ℃ of-900 ℃ of continuous roastings of temperature in the stove, material is decomposed into sulfur dioxide and magnesia continuously, keep temperature equalization in the stove, avoid magnesia Yin Wendu too high and lose activity, influence its reuse effect.Go out furnace gases and separate through the two poles of the earth of cyclone separator and electrostatic precipitator, reclaim in the furnace gas with magnesium oxide particle, mixes as desulfurizing agent with magnesia after the roasting and to use, obtain the furnace gas of enrichment sulfur dioxide simultaneously, compression is bottled, and becomes the sulfur dioxide product.
Advantage of the present invention is, turn waste into wealth, utilize the accessory substance magnesium sulfite of wet type magnesium method desulfurization to make raw material, produce the magnesia desulfurization absorbent, reduced the pollution of sulfur dioxide to atmospheric environment, the magnesia that generates can be used further to desulfurization and absorb, and it is recycling that resource has been obtained, and greatly reduces the operating cost of magnesium method desulfurization.The sulfur dioxide of Sheng Chenging is the raw material of relieving haperacidity simultaneously, can be used for producing sulfuric acid.The present invention provides new approach for the processing of magnesium method desulfurizing byproduct, the recycling of the perfect accessory substance that generates after the flue gas desulfurization.The accessory substance magnesium sulfite prepares magnesia and sulfur dioxide after being applicable to Industrial Boiler flue gas desulfurization.
Description of drawings
Fig. 1 is the technological process that utilizes magnesium desulfurizing byproduct containing magnesium sulfite to produce desulfurizing agent magnesia and sulfur dioxide of the present invention.
The specific embodiment
As seen from Figure 1, a kind of method of utilizing magnesium desulfurizing byproduct containing magnesium sulfite to produce desulfurizing agent magnesia and sulfur dioxide mainly comprises following processing step:
1. dry and broken, the water content of the accessory substance magnesium sulfite that will be come by magnesium method desulphurization system is controlled in 8%, adopts the oven dry of natural seasoning or roller drier, with disintegrating apparatus with the magnesium sulfite crushing to grain below 3mm,
2. roasting, magnesium sulfite after the fragmentation is mixed with an amount of reducing agent coke, send in the fluidizing reactor continuously, fluidizing reactor keeps 700 ℃ of-900 ℃ of continuous roastings of temperature in the stove, material is decomposed into sulfur dioxide and magnesia continuously, keep temperature equalization in the stove, avoid magnesia Yin Wendu too high and lose activity, influence its reuse effect, go out furnace gases and separate with electrostatic precipitator the two poles of the earth through cyclone separator, reclaim in the furnace gas with magnesium oxide particle, mix as desulfurizing agent with magnesia after the roasting and to use, obtain the furnace gas of enrichment sulfur dioxide simultaneously, the compression bottling becomes product.
Claims (1)
1. a method of utilizing magnesium desulfurizing byproduct containing magnesium sulfite to produce desulfurizing agent magnesia and sulfur dioxide mainly comprises roasting technique, it is characterized in that:
1. dry and broken, will be controlled in 8% by the water content of the next accessory substance magnesium sulfite of magnesium method desulphurization system, adopt the natural seasoning oven dry, with disintegrating apparatus magnesium sulfite is crushed to particle diameter 3mm,
2. roasting, magnesium sulfite after the fragmentation is mixed with the reducing agent coke, send in the fluidizing reactor continuously, fluidizing reactor keeps 700 ℃ of-900 ℃ of continuous roastings of temperature in the stove, and material is decomposed into sulfur dioxide and magnesia continuously, goes out furnace gases and separates through the two-stage of cyclone separator and electrostatic precipitator, reclaim in the furnace gas with magnesium oxide particle, mix as the desulfurizing agent use with the magnesia after the roasting, obtain the furnace gas of enrichment sulfur dioxide simultaneously, the compression bottling becomes the sulfur dioxide product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101275996A CN100404108C (en) | 2005-12-08 | 2005-12-08 | Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101275996A CN100404108C (en) | 2005-12-08 | 2005-12-08 | Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process |
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| Publication Number | Publication Date |
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| CN1775681A CN1775681A (en) | 2006-05-24 |
| CN100404108C true CN100404108C (en) | 2008-07-23 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624197B (en) * | 2008-07-07 | 2013-05-22 | 中石化宁波工程有限公司 | Technology for calcining and recycling magnesium desulfurizing byproduct containing magnesium sulfite |
| CN102068885A (en) * | 2010-12-03 | 2011-05-25 | 中节能六合天融环保科技有限公司 | Process for drying, calcining and decomposing desulfurization side product magnesium sulfite |
| CN102101004A (en) * | 2011-01-26 | 2011-06-22 | 中节能六合天融环保科技有限公司 | Method for recovering magnesium oxide and byproduct sulfur dioxide by using indirect heating rotary roasting furnace |
| CN104028085B (en) * | 2014-05-22 | 2017-01-18 | 武汉钢铁(集团)公司 | Flue gas desulfurization technology based on iron ore sintering process |
| CN104477952B (en) | 2014-12-03 | 2016-04-06 | 北京中晶佳镁环境科技股份有限公司 | Fire coal boiler fume produces the apparatus and method of magnesium sulfate |
| CN109052438B (en) * | 2018-07-12 | 2019-04-02 | 山东汇泰再生资源有限公司 | It is a kind of to prepare method of magnesium oxide using magnesium sulfite |
| CN109264752B (en) * | 2018-12-07 | 2023-10-03 | 山东大学 | Method and device for regenerating desulfurizing agent and simultaneously producing byproduct sulfur in magnesium desulfurization |
| CN110921633B (en) * | 2019-10-30 | 2021-05-28 | 郑州轻工业学院 | Method for recycling byproducts of magnesium oxide wet flue gas desulfurization of power station |
| CN110980779A (en) * | 2019-12-17 | 2020-04-10 | 江苏联慧资源环境科技有限公司 | Recovery method of magnesium oxide desulfurizer |
| CN113813758A (en) * | 2021-10-14 | 2021-12-21 | 辽宁玖号科技有限公司 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
| CN114808103B (en) * | 2022-05-05 | 2024-04-09 | 大石桥市圣兴耐火材料有限公司 | Method for preparing modified basic magnesium sulfate by using alkylated waste sulfuric acid and magnesium oxide as flue gas desulfurization product |
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