CN115490421A - Method for recycling waste desulfurized fly ash - Google Patents
Method for recycling waste desulfurized fly ash Download PDFInfo
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- CN115490421A CN115490421A CN202111630935.4A CN202111630935A CN115490421A CN 115490421 A CN115490421 A CN 115490421A CN 202111630935 A CN202111630935 A CN 202111630935A CN 115490421 A CN115490421 A CN 115490421A
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- ash
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- desulfurization ash
- recycling
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- 239000002699 waste material Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004064 recycling Methods 0.000 title claims abstract description 24
- 239000010881 fly ash Substances 0.000 title claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 67
- 239000002956 ash Substances 0.000 claims abstract description 65
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 50
- 230000023556 desulfurization Effects 0.000 claims abstract description 50
- 239000011521 glass Substances 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- 239000010459 dolomite Substances 0.000 claims description 9
- 229910000514 dolomite Inorganic materials 0.000 claims description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 239000010433 feldspar Substances 0.000 claims description 8
- 239000010446 mirabilite Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 235000017550 sodium carbonate Nutrition 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 239000002817 coal dust Substances 0.000 claims description 2
- 239000008188 pellet Substances 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 abstract description 10
- 239000006028 limestone Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009270 solid waste treatment Methods 0.000 abstract description 5
- 239000003245 coal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 238000011096 sample clarification Methods 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/02—Pretreated ingredients
- C03C1/026—Pelletisation or prereacting of powdered raw materials
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a method for recycling waste desulfurized fly ash, which comprises the following steps: (1) Mixing and stirring the waste desulfurization ash and water according to a certain proportion to form a granular waste desulfurization ash mixed material; (2) Extruding the waste desulfurization ash mixed material into cylindrical particles through a granulator; (3) Drying the cylindrical particles to obtain desulfurized ash particles; (4) The desulfurized fly ash particles are mixed with other raw materials involved in producing glass to produce glass. The method recycles the waste desulfurization ash, replaces limestone to manufacture and obtain glass products with the same quality, solves the problem of difficult solid waste treatment, successfully changes waste into valuable, and reduces the raw material cost of enterprises.
Description
Technical Field
The invention relates to waste recycling, in particular to a method for recycling waste desulfurization ash.
Background
The integrated technology of desulfurization, dust removal and denitration of the glass melting furnace is a novel pollution removal process and has been successfully applied to part of glass enterprises in recent years. Compared with the prior art, the process has the advantages of small occupied area, no wastewater discharge and no need of graded removal. The whole system is carried out at high temperature, belongs to a dry method technology, is non-corrosive to equipment, and is more and more favored by glass production enterprises.
The technology generally adopts micron-sized calcium hydroxide as a desulfurizer, the desulfurization belongs to gas-solid reaction, the utilization rate of the desulfurizer is low, a large amount of desulfurization waste ash is generated, and the desulfurization waste ash mainly comprises unreacted calcium hydroxide, reacted calcium carbonate, calcium sulfite, calcium sulfate and solid particles in flue gas.
The desulfurized fly ash belongs to common solid waste, not only pollutes the environment, but also has higher extraction cost due to complex components. The calcium element in the common soda-lime-silica glass is generally provided by limestone, and the desulfurized waste ash can be used as a substitute raw material of the limestone due to higher calcium content, so that the problem of solid waste treatment is solved, waste is changed into valuable, and the raw material cost of enterprises is reduced.
Disclosure of Invention
The invention provides a method for recycling waste desulfurization ash, which solves the problem of solid waste treatment, changes waste into valuable and reduces the cost of raw materials of enterprises.
The invention adopts a technical scheme that: the method for recycling the waste desulfurized fly ash comprises the following steps:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1: (0.5-3) to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles;
(3) Drying the cylindrical particles to ensure that the water content of the cylindrical particles is not more than 3 percent, so as to obtain desulfurized ash particles, wherein the desulfurized ash particles are fragile if the water content of the desulfurized ash particles is too high;
(4) The desulphurizing ash particles are mixed with other raw materials required for producing glass to prepare the glass, and the using amount of the desulphurizing ash particles is based on the component requirements of specific glass types.
Further, the waste desulfurization ash comprises the following components in percentage by weight:
Ca(OH) 2 40～55％；
CaCO 3 10～20％；
CaSO 4 20～30％。
further, the proportion of the waste desulfurization ash and water in the step (1) is 1:0.88.
further, the stirring speed in the step (1) is 30 to 70rad/min.
Furthermore, the diameter and the length of the cylindrical particles in the step (2) are both in the range of 1.0-3.5mm, and if the diameter of the particles is too large, the particles are not easy to melt in glass production, and bubbles are easy to generate, so that the quality of the glass is influenced.
Further, the length of the cylindrical particle is not less than the diameter thereof.
Further, in the step (3), the cylindrical particles are placed in a dryer for drying, the drying temperature is 50-60 ℃, and the drying time is 5-6h.
Further, the cylindrical particles in the step (3) are dried at room temperature, and the drying time is 12-16h.
Further, in the step (4), silica sand, feldspar, soda ash, mirabilite, coal powder, dolomite and the desulfurization ash particles are mixed according to a certain proportion to prepare the glass, the desulfurization ash particles mainly replace limestone in raw materials, and the obtained glass can still reach the same quality.
The method for recycling the waste desulfurized fly ash has the beneficial effects that:
1. the waste desulfurization ash generated in the glass melting furnace desulfurization, dust removal and denitration integrated technology is recycled and used for replacing limestone to provide calcium element in glass production, so that glass products with the same quality can be obtained, the problem of difficulty in solid waste treatment is solved, waste is successfully changed into valuable, and the raw material cost of enterprises is reduced.
Drawings
FIG. 1 is a flow chart of a method for recycling waste desulfurized fly ash according to a first embodiment of the present invention;
FIG. 2 is comparative data showing the production of glass from desulfurized fly ash particles as a raw material instead of limestone in various examples of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1 and 2, a first embodiment of the present invention provides a method for recycling waste desulfurized fly ash, which is suitable for replacing limestone as a raw material for glass production in a dry-process integrated process of flue gas of a float glass melting furnace.
In this embodiment, a method for recycling waste desulfurized fly ash includes the following steps:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1:1, and stirring at a stirring speed of 50rad/min to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles, wherein the diameter of each cylindrical particle is 1mm, and the length of each cylindrical particle is 2mm;
(3) Drying the cylindrical particles at room temperature, wherein the water content of the cylindrical particles is 2.5% after drying for 12h, and thus obtaining desulfurized ash particles;
(4) The glass is prepared by mixing silica sand, feldspar, soda ash, desulfurized ash particles, mirabilite, coal powder and dolomite according to a certain proportion, and the specific components and the sample clarifying effect are shown in figure 2.
In a second embodiment of the present invention, a method for recycling spent desulfurization ash comprises the steps of:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1:2, stirring at a speed of 40rad/min to form a granular waste desulfurized fly ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles, wherein the diameter of each cylindrical particle is 1mm, and the length of each cylindrical particle is 2mm;
(3) Drying the cylindrical particles at room temperature, wherein the water content of the cylindrical particles is 3% after drying for 16h, and thus obtaining desulfurized ash particles;
(4) The glass is prepared by mixing silica sand, feldspar, soda ash, desulfurized ash particles, mirabilite, coal powder and dolomite according to a certain proportion, and the specific components and the sample clarifying effect are shown in figure 2.
In a third embodiment of the present invention, a method for recycling spent desulfurization ash comprises the steps of:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1:1, and stirring at a stirring speed of 50rad/min to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles, wherein the diameter of the cylindrical particles is 1mm, and the length of the cylindrical particles is 2mm;
(3) Drying the cylindrical particles in a dryer at the drying temperature of 60 ℃ for 5h, wherein the water content of the cylindrical particles is 2.3%, and obtaining desulfurized ash particles;
(4) The glass is prepared by mixing silica sand, feldspar, soda ash, desulfurized ash particles, mirabilite, coal powder and dolomite according to a certain proportion, and the specific components and the sample clarifying effect are shown in figure 2.
In a fourth embodiment of the present invention, a method for recycling spent desulfurization ash comprises the steps of:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1:0.88, and the stirring speed is 50rad/min to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles, wherein the diameter of the cylindrical particles is 2mm, and the length of the cylindrical particles is 2mm;
(3) Drying the cylindrical particles in a dryer at the drying temperature of 60 ℃ for 5.5h, wherein the water content of the cylindrical particles is 2.3%, and obtaining desulfurized fly ash particles;
(4) The glass is prepared by mixing silica sand, feldspar, soda ash, desulfurized ash particles, mirabilite, coal powder and dolomite according to a certain proportion, and the specific components and the sample clarifying effect are shown in figure 2.
In a fifth embodiment of the present invention, a method for recycling spent desulfurization ash comprises the steps of:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1:1, stirring at a stirring speed of 50rad/min to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles, wherein the diameter of the cylindrical particles is 3.35mm, and the length of the cylindrical particles is 2mm;
(3) Drying the cylindrical particles in a dryer at the drying temperature of 60 ℃ for 6h, wherein the water content of the cylindrical particles is 2.3%, and obtaining desulfurized ash particles;
(4) The silica sand, the feldspar, the soda ash, the desulfurized fly ash particles, the mirabilite, the coal dust and the dolomite are mixed according to a certain proportion to prepare the glass, and the specific components and the clarification effect of a sample are shown in figure 2.
In the sixth embodiment, a comparison experiment is carried out, silica sand, feldspar, soda ash, limestone, mirabilite, coal powder and dolomite are mixed according to a certain proportion to prepare glass, specific components and sample clarification effects are shown in figure 2, and in the first to fifth embodiments, glass is prepared by replacing limestone with desulfurized ash particles, so that glass with the same quality can be obtained.
The method for recycling the waste desulfurized fly ash has the beneficial effects that:
1. the waste desulfurization ash generated in the glass melting furnace desulfurization, dedusting and denitration integrated technology is recycled and used for replacing limestone and partial dolomite to provide calcium element in glass production, so that glass products with the same quality can be obtained, the problem of difficulty in solid waste treatment is solved, waste is successfully changed into valuable, and the raw material cost of enterprises is reduced.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A method for recycling waste desulfurized fly ash is characterized by comprising the following steps:
(1) Mixing the waste desulfurization ash and water according to the proportion of 1: (0.5-3) to form a granular waste desulfurization ash mixed material;
(2) Extruding and molding the waste desulfurization ash mixed material by a granulator to form cylindrical particles;
(3) Drying the cylindrical particles to ensure that the water content of the cylindrical particles is not more than 3 percent, thereby obtaining desulfurized ash particles;
(4) The desulphurizing ash particles are mixed with other raw materials required for producing glass to prepare the glass, and the using amount of the desulphurizing ash particles is based on the component requirements of specific glass types.
2. The method for recycling the waste desulfurization ash as claimed in claim 1, wherein the waste desulfurization ash comprises the following components in percentage by weight:
Ca(OH) 2 40～55％；
CaCO 3 10～20％；
CaSO 3 5～10％；
CaSO 4 20～30％。
3. the method for recycling the waste desulfurization ash according to claim 1, wherein the ratio of the waste desulfurization ash to water in the step (1) is 1:0.88.
4. the method for recycling waste desulfurized fly ash according to claim 1, wherein the stirring speed in step (1) is 30-70rad/min.
5. The method for recycling waste desulfurized fly ash according to claim 1, wherein the diameter and length of said cylindrical particles in step (2) are each in the range of 1.0 to 3.5 mm.
6. The method for recycling waste desulfurization ash according to claim 1, wherein in the step (3), the cylindrical particles are placed in a dryer for drying, the drying temperature is 50-60 ℃, and the drying time is 5-6h.
7. The method for recycling waste desulfurization ash according to claim 1, wherein the cylindrical pellets are dried at room temperature in the step (3) for 12-16h.
8. The method for recycling waste desulfurization ash according to claim 1, wherein in the step (4), silica sand, feldspar, soda ash, mirabilite, coal dust, dolomite and the desulfurization ash particles are mixed according to a certain proportion to prepare glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111630935.4A CN115490421A (en) | 2021-12-28 | 2021-12-28 | Method for recycling waste desulfurized fly ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111630935.4A CN115490421A (en) | 2021-12-28 | 2021-12-28 | Method for recycling waste desulfurized fly ash |
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| CN115490421A true CN115490421A (en) | 2022-12-20 |
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| CN202111630935.4A Pending CN115490421A (en) | 2021-12-28 | 2021-12-28 | Method for recycling waste desulfurized fly ash |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0545804A1 (en) * | 1991-12-05 | 1993-06-09 | Constructions Industrielles De La Mediterranee- Cnim | Method and plant for the vitrification or melting of solid residues from the purification of fumes exhausted by a waste incinerator |
| CN102167516A (en) * | 2011-01-10 | 2011-08-31 | 大连工业大学 | Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass |
| CN103508667A (en) * | 2012-06-26 | 2014-01-15 | 广东华兴玻璃有限公司 | Glass and preparation method thereof |
| CN110436772A (en) * | 2019-09-06 | 2019-11-12 | 葛芳玮 | A kind of soda-lime-silica glass |
| CN111908788A (en) * | 2020-08-26 | 2020-11-10 | 安徽溢彩玻璃器皿有限公司 | Method for producing glass by utilizing desulfurization waste |
-
2021
- 2021-12-28 CN CN202111630935.4A patent/CN115490421A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0545804A1 (en) * | 1991-12-05 | 1993-06-09 | Constructions Industrielles De La Mediterranee- Cnim | Method and plant for the vitrification or melting of solid residues from the purification of fumes exhausted by a waste incinerator |
| CN102167516A (en) * | 2011-01-10 | 2011-08-31 | 大连工业大学 | Microcrystalline glass prepared from desulphurized coal ash and preparation method of microcrystalline glass |
| CN103508667A (en) * | 2012-06-26 | 2014-01-15 | 广东华兴玻璃有限公司 | Glass and preparation method thereof |
| CN110436772A (en) * | 2019-09-06 | 2019-11-12 | 葛芳玮 | A kind of soda-lime-silica glass |
| CN111908788A (en) * | 2020-08-26 | 2020-11-10 | 安徽溢彩玻璃器皿有限公司 | Method for producing glass by utilizing desulfurization waste |
Non-Patent Citations (1)
| Title |
|---|
| 彭寿等: "《平板玻璃生产过程与缺陷控制》", 武汉理工大学出版社 * |
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Application publication date: 20221220 |