CN1320945C - Method for carrying out flue gas desulfurization by using mineral powder of magnesite - Google Patents
Method for carrying out flue gas desulfurization by using mineral powder of magnesite Download PDFInfo
- Publication number
- CN1320945C CN1320945C CN 200510087048 CN200510087048A CN1320945C CN 1320945 C CN1320945 C CN 1320945C CN 200510087048 CN200510087048 CN 200510087048 CN 200510087048 A CN200510087048 A CN 200510087048A CN 1320945 C CN1320945 C CN 1320945C
- Authority
- CN
- China
- Prior art keywords
- flue gas
- desulphurization
- desulfurizing tower
- magnesite
- magnesium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000003546 flue gas Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000843 powder Substances 0.000 title claims abstract description 20
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 15
- 239000001095 magnesium carbonate Substances 0.000 title claims abstract description 12
- 235000014380 magnesium carbonate Nutrition 0.000 title claims abstract description 12
- 229910000021 magnesium carbonate Inorganic materials 0.000 title claims abstract description 12
- 238000006477 desulfuration reaction Methods 0.000 title claims description 16
- 230000023556 desulfurization Effects 0.000 title claims description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims description 8
- 235000010755 mineral Nutrition 0.000 title claims description 8
- 239000011707 mineral Substances 0.000 title claims description 8
- 239000002002 slurry Substances 0.000 claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000002250 absorbent Substances 0.000 claims abstract description 8
- 230000002745 absorbent Effects 0.000 claims abstract description 8
- 239000006227 byproduct Substances 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000003500 flue dust Substances 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 230000003009 desulfurizing effect Effects 0.000 claims description 18
- 239000013505 freshwater Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 15
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011777 magnesium Substances 0.000 abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 abstract description 11
- 239000000395 magnesium oxide Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 abstract description 6
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 239000003337 fertilizer Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 abstract description 3
- 235000019341 magnesium sulphate Nutrition 0.000 abstract description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 3
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
Abstract
The present invention relates to a method for carrying out flue gas desulphurization by using magnesite ore powder. The method comprises the following technological processes that (1) magnesite ores are pulverized into power and are prepared into absorbent slurry by adding water, and the absorbent slurry is sent into a desulphurization tower; (2) boiler flue gas is led into a flue gas desulphurization pretreatment device to remove partial flue dust and the ingredients of HCL, HF and SO3, and then the flue gas is also sent into the desulphurization tower; (3) in the desulphurization tower, SO2 in the flue gas reacts with MgCO3 in the absorbent slurry to generate MgSO3, and thus, the SO2 in the flue gas is removed; (4) when the desulphurization and absorption cycle process is stabilized, the circulating slurry can enter a by-product preparation device, and magnesium sulfite is generated through dehydration or magnesium sulfate fertilizers are generated through aerating oxidation, impurity removal and concentration. The present invention has the advantages that the magnesite ore powder is directly used to substitute for magnesia powder as a liquid absorbent, fuel consumption and smoke treatment caused by the manufacture link of a desulphurization agent of a magnesium oxide method are avoided, and the operation cost of the flue gas desulphurization technology of a wet type magnesium method is reduced. The present invention is applicable to the flue gas desulphurization technology of the wet type magnesium method.
Description
Technical field
The invention belongs to and utilize liquid-absorbant to divide the floating ion technology of loosing in the separable flue gas, particularly a kind of magnesium ore powder that utilizes replaces magnesia powder as the flue gas desulfurization absorbent, and flue gas is carried out the method that desulfurization is handled.
Background technology
At present, flue gas desulfurization technique is widely used aspect industrial flue gas cleaning, generally is to adopt alkaline absorption solution spray flue gas, makes flue dust and sulfur dioxide in the flue gas enter absorption liquid together, thereby purifies flue gas.Usually adopt the flue gas desulfurization of wet type calcium method, but the bulk deposition of its by-produced gypsum forms serious secondary pollution to environment.In recent years, have the wet type magnesium method flue gas desulphurization to be used, the equipment investment of wet type magnesium method flue gas desulphurization is a little less than wet type calcium method, and its operation, maintenance cost are lower than wet type calcium method, and the value of byproduct is better than wet type calcium method, and broad prospect of application is arranged.But it adopts magnesia powder as raw sorbent, and the magnesia powder cost is higher, and manufacture process has smoke pollution, and technology is applied and is affected.
Summary of the invention
The objective of the invention is, adopt mineral powder of magnesite to replace magnesia powder as liquid-absorbant, to reduce the operating cost of wet type magnesium method flue gas desulphurization technology, improve the wet type magnesium method flue gas desulphurization technique, avoid the magnesium oxide method desulfurizing agent to make the fuel consumption and the smoke gas treatment of link, reduce the desulfurizing agent manufacturing cost, be beneficial to applying of wet type magnesium method flue gas desulphurization technique, help the control of synthesized environmental protection index.
Technical scheme of the present invention is, a kind of method of utilizing mineral powder of magnesite to carry out flue gas desulfurization, and its technological process is:
1. the ball milling ore is sent giobertite into ball mill, grinds to form 250-300 purpose powder, is mixed with water in proportion to absorb slurries (absorbent), and slurry solid content 20%-30% sends into desulfurizing tower,
2. flue gas impurity elimination is introduced the flue gas desulfurization pretreatment unit with boiler smoke, through the recirculated water spray, reduces flue-gas temperature, removes part flue dust, HCl, HF, SO
3Composition is regulated by the fresh water (FW) addition of pretreatment unit, guarantees the gas temperature of desulfurizing tower inlet, sends into desulfurizing tower,
3. absorption reaction, in desulfurizing tower, the SO in the flue gas
2With the MgCO that absorbs in the slurries
3Reaction generates MgSO
3Thereby, with the SO in the flue gas
2Remove, temperature is at 50-55 ℃ in the control desulfurizing tower, and the loop slurry pH value is controlled at the 5-6 interval,
4. the preparation of byproduct, after desulfurization absorption cyclic process was stable, loop slurry can enter the preparation facilities of byproduct, generates the higher magnesium sulfite of purity by dehydration, or by the aeration oxidation, decontamination, concentrated again, generate magnesium sulfate fertilizer.
Good effect of the present invention is, directly replace magnesia powder as liquid-absorbant with mineral powder of magnesite, avoid the magnesium oxide method desulfurizing agent to make the fuel consumption and the smoke gas treatment of link, reduce the operating cost of wet type magnesium method flue gas desulphurization technology, improve the wet type magnesium method flue gas desulphurization technique.Be applicable to the flue gas desulfurization technique of wet type magnesium method.
Description of drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 utilizes mineral powder of magnesite to carry out the process chart of flue gas desulfurization
The specific embodiment
As seen from Figure 1, a kind of method of utilizing mineral powder of magnesite to carry out flue gas desulfurization, its technological process:
1. the ball milling ore is sent giobertite into ball mill, grinds to form 250-300 purpose powder, is mixed with water in proportion to absorb slurries (absorbent), and slurry solid content 20%-30% sends into desulfurizing tower,
2. flue gas impurity elimination is introduced the flue gas desulfurization pretreatment unit with boiler smoke, through the recirculated water spray, reduces flue-gas temperature, removes part flue dust, HCl, HF, SO
3Composition is regulated by the fresh water (FW) addition of pretreatment unit, guarantees the gas temperature of desulfurizing tower inlet, sends into desulfurizing tower,
3. absorption reaction, in desulfurizing tower, the SO in the flue gas
2With the MgCO that absorbs in the slurries
3Reaction generates MgSO
3Thereby, with the SO in the flue gas
2Remove, temperature is at 50-55 ℃ in the control desulfurizing tower, and the loop slurry pH value is controlled at the 5-6 interval,
4. the preparation of byproduct, after desulfurization absorption cyclic process was stable, loop slurry can enter the preparation facilities of byproduct, generates the higher magnesium sulfite of purity by dehydration, or by the aeration oxidation, decontamination, concentrated again, generate magnesium sulfate fertilizer.
Claims (1)
1, a kind of method of utilizing mineral powder of magnesite to carry out flue gas desulfurization comprises the preparation absorbent, absorption reaction, and the byproduct preparation is characterized in that:
1. the ball milling ore is sent giobertite into ball mill, grinds to form 250-300 purpose powder, is mixed with the absorption slurries with water in proportion, and slurry solid content 20%-30% sends into desulfurizing tower,
2. flue gas impurity elimination is introduced the flue gas desulfurization pretreatment unit with boiler smoke, through the recirculated water spray, reduces flue-gas temperature, removes part flue dust, HCl, HF, SO
3Composition is regulated by the fresh water (FW) addition of pretreatment unit, guarantees the gas temperature of desulfurizing tower inlet, sends into desulfurizing tower,
3. absorption reaction, in desulfurizing tower, the SO in the flue gas
2With the MgCO that absorbs in the slurries
3Reaction generates MgSO
3, temperature is at 50-55 ℃ in the control desulfurizing tower, and the loop slurry pH value is controlled at the 5-6 interval, thereby with the SO in the flue gas
2Remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510087048 CN1320945C (en) | 2005-07-26 | 2005-07-26 | Method for carrying out flue gas desulfurization by using mineral powder of magnesite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510087048 CN1320945C (en) | 2005-07-26 | 2005-07-26 | Method for carrying out flue gas desulfurization by using mineral powder of magnesite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727055A CN1727055A (en) | 2006-02-01 |
| CN1320945C true CN1320945C (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510087048 Expired - Fee Related CN1320945C (en) | 2005-07-26 | 2005-07-26 | Method for carrying out flue gas desulfurization by using mineral powder of magnesite |
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| CN (1) | CN1320945C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580485A (en) * | 2012-02-24 | 2012-07-18 | 辽宁科技大学 | Flue gas desulfurization method for preparing desulfurizer by utilizing magnesite tailings obtained through flotation |
| CN103387246A (en) * | 2012-05-09 | 2013-11-13 | 中节能六合天融环保科技有限公司 | Treatment process suitable for rapidly oxidizing magnesium sulfite to magnesium sulfate |
| CN111495165A (en) * | 2020-06-05 | 2020-08-07 | 昆明理工大学 | Magnesium-containing ore desulfurization and denitrification slurry and synchronous desulfurization and denitrification method |
| CN113634587B (en) * | 2021-08-25 | 2023-01-31 | 昆明理工大学 | Resource utilization method for desulfurization and sulfur by using magnesite |
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2005
- 2005-07-26 CN CN 200510087048 patent/CN1320945C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1727055A (en) | 2006-02-01 |
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Address after: Building 6, block E, Ka Wah building, No. 9, 3rd floor, Haidian District, Beijing Patentee after: TalRoad Environment Protection Techonology Co., Ltd. Address before: 2C building, Zhongguancun development building, No. 12 information road, Beijing, Haidian District Patentee before: TalRoad Environment Protection Techonology Co., Ltd. |
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Addressee: Yang Jian Document name: Notification to Pay the Fees |
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Owner name: NEWHOPE + TALROAD ENVIRONMENTAL PROTECTION GROUP C Free format text: FORMER NAME: LIUHETIANRONG (BEIJING) ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |
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Address after: 100085, E, building 6, Ka Wah building, No. 9, 3rd floor, Haidian District, Beijing Patentee after: CECEP LiuHe Talroad Environmental Technology Co., Ltd. Address before: 100085, E, building 6, Ka Wah building, No. 9, 3rd floor, Haidian District, Beijing Patentee before: TalRoad Environment Protection Techonology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070613 Termination date: 20180726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |