CN113813758A - Magnesium oxide-based desulfurizing agent and preparation method thereof - Google Patents
Magnesium oxide-based desulfurizing agent and preparation method thereof Download PDFInfo
- Publication number
- CN113813758A CN113813758A CN202111196529.1A CN202111196529A CN113813758A CN 113813758 A CN113813758 A CN 113813758A CN 202111196529 A CN202111196529 A CN 202111196529A CN 113813758 A CN113813758 A CN 113813758A
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- Prior art keywords
- magnesium oxide
- parts
- magnesite
- magnesium
- pore
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- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 29
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 29
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 27
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 12
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 12
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 12
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 12
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 12
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 12
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 10
- 230000023556 desulfurization Effects 0.000 abstract description 10
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 3
- 229910052815 sulfur oxide Inorganic materials 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/16—Magnesium hydroxide by treating magnesia, e.g. calcined dolomite, with water or solutions of salts not containing magnesium
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Biomedical Technology (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a magnesium oxide based desulfurizer which is composed of the following raw materials in parts by weight: 300-700 parts of magnesium hydroxide, 400-600 parts of deionized water and 20-70 parts of pore-forming agent. A preparation method of a magnesium oxide based desulfurizing agent comprises the following steps: the method comprises the following steps: taking magnesite, removing impurities and crushing the magnesite; step two: putting the magnesite crushed in the step one into a combustion kiln for calcination, wherein the calcination temperature is 500 ℃ and the calcination time is 20-60min, so as to obtain magnesium oxide with the purity of 80-90% and the particle size of 20-40 mu m; step three: curing the magnesium oxide obtained in the step two to generate magnesium hydroxide; step four: and uniformly mixing the magnesium hydroxide, the pore-forming agent and the deionized water according to a certain ratio to obtain the magnesium oxide based desulfurizer. Compared with the prior art, the invention has the advantages that: the desulfurization efficiency is higher, and the preparation process is simpler and more convenient.
Description
Technical Field
The technical field of the desulfurization agent, in particular to a magnesium oxide based desulfurizer and a preparation method thereof
Background
The desulfurization agent generally refers to an agent that removes free sulfur or sulfur compounds from a fuel, feedstock, or other material; in the control and treatment of pollutants, mainly the agents used for removing sulfur oxides (including SO2 and SO3) in exhaust gases, various basic compounds can be used as desulfurizing agents.
Aiming at the most important existing desulfurizer in China for desulfurizing the flue gas discharged by a factory and removing sulfur dioxide in flue waste gas, the most important desulfurizer is alkaline solution prepared from cheap lime, limestone and lime stone medicament. The desulfurizer can absorb most of sulfur dioxide in the flue gas and fix the sulfur dioxide in the fuel slag. The tail gas containing sulfur dioxide is treated by sodium carbonate, alkaline aluminum sulfate and other solutions as desulfurizing agents in chemical plants, smelting plants and the like, and can be desorbed and recycled. However, the desulfurization effect of the above-mentioned desulfurizing agent is not ideal, and therefore a desulfurizing agent having a high desulfurization efficiency is demanded.
Disclosure of Invention
The invention aims to overcome the technical defects and provide the magnesium oxide based desulfurizer and the preparation method thereof, which have high desulfurization efficiency and simple and convenient preparation process.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the magnesium oxide based desulfurizer consists of the following raw materials in parts by weight: 300-700 parts of magnesium hydroxide, 400-600 parts of deionized water and 20-70 parts of pore-forming agent.
Preferably, the pore-forming agent is any one of polyethylene glycol and sodium silicate.
A preparation method of a magnesium oxide based desulfurizing agent comprises the following steps:
the method comprises the following steps: taking magnesite, removing impurities and crushing the magnesite;
step two: putting the magnesite crushed in the step one into a combustion kiln for calcination, wherein the calcination temperature is 500 ℃ and the calcination time is 20-60min, so as to obtain magnesium oxide with the purity of 80-90% and the particle size of 20-40 mu m;
step three: curing the magnesium oxide obtained in the step two to generate magnesium hydroxide;
step four: and uniformly mixing the magnesium hydroxide, the pore-forming agent and the deionized water according to a certain ratio to obtain the magnesium oxide based desulfurizer.
Compared with the prior art, the invention has the advantages that: the magnesium oxide has large storage capacity and rich sources in China, the magnesium-based desulfurizer has the desulfurization reaction capacity which is tens of times higher than that of a calcium base, the desulfurization efficiency is high and can reach more than 96%, and meanwhile, the magnesium-based desulfurizer has high removal capacity for sulfur oxides with various concentrations.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention discloses a magnesium oxide based desulfurizer which is composed of the following raw materials in parts by weight: 300-700 parts of magnesium hydroxide, 400-600 parts of deionized water and 20-70 parts of pore-forming agent.
Preferably, the pore-forming agent is any one of polyethylene glycol and sodium silicate.
A preparation method of a magnesium oxide based desulfurizing agent comprises the following steps:
the method comprises the following steps: taking magnesite, removing impurities and crushing the magnesite;
step two: putting the magnesite crushed in the step one into a combustion kiln for calcination, wherein the calcination temperature is 500 ℃ and the calcination time is 20-60min, so as to obtain magnesium oxide with the purity of 80-90% and the particle size of 20-40 mu m;
step three: curing the magnesium oxide obtained in the step two to generate magnesium hydroxide;
step four: and uniformly mixing the magnesium hydroxide, the pore-forming agent and the deionized water according to a certain ratio to obtain the magnesium oxide based desulfurizer.
The magnesium oxide in China has large storage capacity and rich sources, meanwhile, the solubility of the magnesium oxide-based desulfurizer product is higher than that of the calcium-based desulfurizer product, sulfur dioxide is dissolved in wastewater in the form of sulfate and sulfite after absorption, the operation is simpler without slurry operation, in addition, the magnesium-based desulfurizer has the desulfurization reaction capacity which is tens of times higher than that of the calcium-based desulfurizer, the desulfurization efficiency is higher and can reach more than 96%, and meanwhile, the magnesium oxide-based desulfurizer has higher removal capacity for sulfur oxides with various concentrations.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A magnesium oxide based desulfurizing agent is characterized in that: the composition is characterized by comprising the following raw materials in parts by weight: 300-700 parts of magnesium hydroxide, 400-600 parts of deionized water and 20-70 parts of pore-forming agent.
2. The magnesium oxide-based desulfurizing agent according to claim 1, characterized in that: the pore-forming agent is any one of polyethylene glycol and sodium silicate.
3. The method for preparing a magnesium oxide-based desulfurizing agent according to any one of claims 1-2, wherein: the method comprises the following steps:
the method comprises the following steps: taking magnesite, removing impurities and crushing the magnesite;
step two: putting the magnesite crushed in the step one into a combustion kiln for calcination, wherein the calcination temperature is 500 ℃ and the calcination time is 20-60min, so as to obtain magnesium oxide with the purity of 80-90% and the particle size of 20-40 mu m;
step three: curing the magnesium oxide obtained in the step two to generate magnesium hydroxide;
step four: and uniformly mixing the magnesium hydroxide, the pore-forming agent and the deionized water according to a certain ratio to obtain the magnesium oxide based desulfurizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196529.1A CN113813758A (en) | 2021-10-14 | 2021-10-14 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111196529.1A CN113813758A (en) | 2021-10-14 | 2021-10-14 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113813758A true CN113813758A (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111196529.1A Pending CN113813758A (en) | 2021-10-14 | 2021-10-14 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580203A (en) * | 2003-08-04 | 2005-02-16 | 煤炭科学研究总院北京煤化工研究分院 | Method for increasing strength and water resistance of desulfurizing agent |
| CN1775681A (en) * | 2005-12-08 | 2006-05-24 | 六合天融（北京）环保科技有限公司 | Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process |
| CN103864121A (en) * | 2014-03-20 | 2014-06-18 | 大连理工大学 | Method for preparing magnesium hydrate by hydrating with high solid-to-liquid ratio |
| CN110981227A (en) * | 2019-12-27 | 2020-04-10 | 辽宁东和新材料股份有限公司 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
| CN113117486A (en) * | 2019-12-30 | 2021-07-16 | 中晶环境科技股份有限公司 | Integrated treatment method for flue gas desulfurization and denitrification and cementing material preparation |
-
2021
- 2021-10-14 CN CN202111196529.1A patent/CN113813758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580203A (en) * | 2003-08-04 | 2005-02-16 | 煤炭科学研究总院北京煤化工研究分院 | Method for increasing strength and water resistance of desulfurizing agent |
| CN1775681A (en) * | 2005-12-08 | 2006-05-24 | 六合天融（北京）环保科技有限公司 | Method for preparing desulfurizer magnesium oxide and sulfur dioxide utilizing desulfurizing by-product magnesium sulfite by magnesium process |
| CN103864121A (en) * | 2014-03-20 | 2014-06-18 | 大连理工大学 | Method for preparing magnesium hydrate by hydrating with high solid-to-liquid ratio |
| CN110981227A (en) * | 2019-12-27 | 2020-04-10 | 辽宁东和新材料股份有限公司 | Magnesium oxide-based desulfurizing agent and preparation method thereof |
| CN113117486A (en) * | 2019-12-30 | 2021-07-16 | 中晶环境科技股份有限公司 | Integrated treatment method for flue gas desulfurization and denitrification and cementing material preparation |
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