CN107537291A - A kind of calcium-based desulfurization additive and the desulfurization absorbent containing the additive - Google Patents
A kind of calcium-based desulfurization additive and the desulfurization absorbent containing the additive Download PDFInfo
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- CN107537291A CN107537291A CN201710681353.6A CN201710681353A CN107537291A CN 107537291 A CN107537291 A CN 107537291A CN 201710681353 A CN201710681353 A CN 201710681353A CN 107537291 A CN107537291 A CN 107537291A
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Abstract
A kind of desulfurization absorbent the invention discloses calcium-based desulfurization additive and containing the additive.The calcium-based desulfurization additive is made up of the raw material of following mass parts：1.5~3 parts of ferrous oxides, 40~70 parts of iron oxide, 1~3 part of magnesia, 1.5~3.5 parts of silica, 8~17 parts of aluminum oxide, 1.5~3.5 parts of titanium dioxide, 18~28 parts of activated carbons.Also disclose a kind of desulfurization absorbent containing the additive.Using the calcium-based desulfurization additive application of the present invention in desulfurization absorbent, desulfurization rate can be effectively lifted, the solid sulphur of and can prevents SO2Secondary release, positive effect, ensuring to ensure that effective desulfurized effect on the basis of cost-effective.
Description
Technical field
A kind of desulfurization absorbent the present invention relates to calcium-based desulfurization additive and containing the additive.
Background technology
In cement kiln and the dry desulfurizing process of thermal power generation, the sulfur method based on calcium base is used mostly, due to calcium
Base has that utilization rate is not high, and reaction speed is slow in sweetening process, and unstable after desulfurization, the SO of removing2Secondary it can release
Put.Existing calcium-based desulfurization additive, composition is single or active inadequate, and to lifting calcium-based desulfurization DeGrain, what is had can play
Preferable catalytic action but can not consolidate sulphur well and prevent SO2Secondary release, what is had can play captured sulfur result, can not but expire
Foot lifting desulfurized effect.
CN105779074A discloses a kind of cement kiln calcium base catalytic desulfurizing agent, and the catalytic desulfurizing agent has used rare gold
Belong to compound, raw material sources are not easy and cost is higher.In addition, the iron oxide content used in the desulfurizing agent is relatively low, do not have good
Good catalytic effect.At present, it would be highly desirable to which it is obvious to develop a kind of desulfurized effect, lower-cost calcium-based desulfurization additive.
The content of the invention
A kind of desulfurization absorbent it is an object of the invention to provide calcium-based desulfurization additive and containing the additive.
The technical solution used in the present invention is：
A kind of calcium-based desulfurization additive, is made up of the raw material of following mass parts：1.5~3 parts of ferrous oxides, 40~70 parts
Iron oxide, 1~3 part of magnesia, 1.5~3.5 parts of silica, 8~17 parts of aluminum oxide, 1.5~3.5 parts of titanium dioxide, 18~
28 parts of activated carbons.
Preferably, a kind of calcium-based desulfurization additive, is made up of the raw material of following mass parts：2~2.5 parts of ferrous oxides,
50~60 parts of iron oxide, 1.5~2.5 parts of magnesia, 2~3 parts of silica, 10~15 parts of aluminum oxide, 2~3 parts of titanium dioxide,
20~25 parts of activated carbons.
Ferrous oxide, iron oxide, magnesia, silica, the particle diameter of aluminum oxide and titanium dioxide are 70 μm~80 μm.
The particle diameter of activated carbon is 55 μm~65 μm.
A kind of desulfurization absorbent, including calcium-based desulfurizing agent and the calcium-based desulfurization additive of the present invention.
In desulfurization absorbent, the addition of calcium-based desulfurization additive accounts for 8wt%~12wt% of calcium-based desulfurizing agent quality.
A kind of application of the above-mentioned desulfurization absorbent in cement kiln or thermal power generation dry desulfurization.
The beneficial effects of the invention are as follows：
Using the calcium-based desulfurization additive application of the present invention in desulfurization absorbent, desulfurization rate can be effectively lifted, again
Admittedly SO can be prevented by sulphur2Secondary release, positive effect, ensuring to ensure that effective desulfurization effect on the basis of cost-effective
Fruit.
Embodiment
A kind of calcium-based desulfurization additive, is made up of the raw material of following mass parts：1.5~3 parts of ferrous oxides, 40~70 parts
Iron oxide, 1~3 part of magnesia, 1.5~3.5 parts of silica, 8~17 parts of aluminum oxide, 1.5~3.5 parts of titanium dioxide, 18~
28 parts of activated carbons.
Preferably, a kind of calcium-based desulfurization additive, is made up of the raw material of following mass parts：2~2.5 parts of ferrous oxides,
50~60 parts of iron oxide, 1.5~2.5 parts of magnesia, 2~3 parts of silica, 10~15 parts of aluminum oxide, 2~3 parts of titanium dioxide,
20~25 parts of activated carbons.
Preferably, the particle diameter of ferrous oxide, iron oxide, magnesia, silica, aluminum oxide and titanium dioxide is 70 μm
~80 μm.
Preferably, the particle diameter of activated carbon is 55 μm~65 μm.
A kind of desulfurization absorbent, including calcium-based desulfurizing agent and the calcium-based desulfurization additive of the present invention.
Preferably, in desulfurization absorbent, the addition of calcium-based desulfurization additive account for the 8wt% of calcium-based desulfurizing agent quality~
12wt%；It is further preferred that the addition of calcium-based desulfurization additive accounts for the 10wt% of calcium-based desulfurizing agent quality.
Calcium-based desulfurizing agent is lime stone, quick lime, the preferably at least one of white lime, white lime.
A kind of application of the above-mentioned desulfurization absorbent in cement kiln or thermal power generation dry desulfurization, specific method are as follows：
First, the application in cement kiln dry desulfurization
Desulfurization absorbent is squeezed into the stand-by desulfurization powder tank of factory, the SO discharged according to cement kiln back segment2Discharge value feeds back
To central control system, so as to control to adjust desulfurization powder give electric machine frequency reach control desulfurizing agent to amount, by desulfurization powder plus
Enter to cement slurry to enter calcining kiln entrance and raw material to enter by a certain percentage and burn till section, ensure that the abundant of desulfurization powder and raw material
Contact is uniform, and can rapidly be spread in sintering process and catch caused SO2Gas, and anti-life is reacted with desulfurizing agent rapidly.Due to
The addition of upper additive, calcium base utilization rate are greatly improved, and most of calcium sulfite of simultaneous reactions generation is also by fast reaction
Into calcium sulfate, S elements are preferably fixed, it is ensured that SO2Outer row's effect, furthermore the SO to escape on a small quantity2Also can be inhaled by activated carbon
It is attached, it has been directly entered in clinker.So as to significantly improve desulfurized effect.
2nd, large medium-size boiler and power plant dry desulfurization application
The reaction mechanism is consistent with cement kiln mechanism, adds application method：1st, can be sprayed into directly into burner hearth added with
The lime of additive, the SO with coal-fired release in burner hearth2Haptoreaction, absorption, reach desulfurized effect；2nd, taken off originally using lime
The vulcanization bed of sulphur can not equally change technique, directly be replaced with above desulfurization absorbent, and have has with carbonate-free lime desulfurized effect
It is obviously improved.
Present disclosure is described in further detail below by way of specific embodiment.
Embodiment 1：
The calcium-based desulfurization additive raw material composition of the embodiment 1 of table 1
Embodiment 2：
The calcium-based desulfurization additive raw material composition of the embodiment 2 of table 2
| Material name | Mass parts |
| Ferrous oxide | 2.5 |
| Iron oxide | 55 |
| Magnesia | 2 |
| Silica | 3 |
| Aluminum oxide | 15 |
| Titanium dioxide | 2 |
| Activated carbon | 20.5 |
Embodiment 3：
The calcium-based desulfurization additive raw material composition of the embodiment 3 of table 3
| Material name | Mass parts |
| Ferrous oxide | 2 |
| Iron oxide | 50 |
| Magnesia | 2 |
| Silica | 3 |
| Aluminum oxide | 15 |
| Titanium dioxide | 3 |
| Activated carbon | 25 |
Activated carbon in embodiment 1~3 crosses 250 eye mesh screens, and remaining raw material crosses 200 eye mesh screens.Activated carbon is more carefully can
Allow activated carbon to be preferably distributed in mixture, be more conducive to the performance of its adsorption function.
The preparation method of the calcium-based desulfurization additive of the embodiment of the present invention 1~3 is：Raw material is weighed by each composition, is stirred
.
The calcium-based desulfurization additive that embodiment 1~3 is prepared is mixed with calcium-based desulfurizing agent, desulfurization absorbent is made,
The addition of calcium-based desulfurization additive is the 10wt% of calcium-based desulfurizing agent quality.Calcium base takes off in desulfurization absorbent of the embodiment of the present invention
Sulphur agent is white lime.
Two kinds of desulfurization of the desulfurization absorbent that the present invention is prepared and pure calcium-based desulfurizing agent and commercial type are inhaled
Receive agent and practical application comparative analysis is done in 5000 cement kilns, as a result as shown in table 4.
Actual use contrast of the 4 different desulfurizing agents of table in 5000 tons of cement kilns
Contrast used above is the actual result of cement kiln flue gas desulfurization under the same conditions.
It was found from the comparing result of table 4, desulfurization absorbent of the invention can save usage amount, and desulfurized effect is obvious, warp
Half has almost dropped in Ji remarkable benefit, particularly embodiment 3, its use cost.Therefore, sulfur-removing additives practicality of the invention has
Effect.
Claims (7)
- A kind of 1. calcium-based desulfurization additive, it is characterised in that：It is made up of the raw material of following mass parts：1.5~3 parts of oxidations are sub- Iron, 40~70 parts of iron oxide, 1~3 part of magnesia, 1.5~3.5 parts of silica, 8~17 parts of aluminum oxide, 1.5~3.5 part two Titanium oxide, 18~28 parts of activated carbons.
- A kind of 2. calcium-based desulfurization additive according to claim 1, it is characterised in that：It is the raw material group by following mass parts Into：2~2.5 parts of ferrous oxides, 50~60 parts of iron oxide, 1.5~2.5 parts of magnesia, 2~3 parts of silica, 10~15 parts of oxygen Change aluminium, 2~3 parts of titanium dioxide, 20~25 parts of activated carbons.
- A kind of 3. calcium-based desulfurization additive according to claim 1 or 2, it is characterised in that：Ferrous oxide, iron oxide, oxygen The particle diameter for changing magnesium, silica, aluminum oxide and titanium dioxide is 70 μm~80 μm.
- A kind of 4. calcium-based desulfurization additive according to claim 1 or 2, it is characterised in that：The particle diameter of activated carbon is 55 μm ~65 μm.
- A kind of 5. desulfurization absorbent, it is characterised in that：Add including the calcium-based desulfurization described in calcium-based desulfurizing agent and claim 1 or 2 Add agent.
- A kind of 6. desulfurization absorbent according to claim 5, it is characterised in that：The addition of calcium-based desulfurization additive accounts for calcium 8wt%~12wt% of base desulfurizer quality.
- A kind of 7. application of desulfurization absorbent in cement kiln or thermal power generation dry desulfurization described in claim 5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108654315A (en) * | 2018-05-08 | 2018-10-16 | 北京工业大学 | A kind of preparation method of rice hull ash/carbide slag system flue gas desulfurization and denitrification absorbent |
| CN111589288A (en) * | 2020-07-10 | 2020-08-28 | 阳春新钢铁有限责任公司 | Desulfurization, denitrification and white removal device for ultralow emission of flue gas of sintering machine and process thereof |
| CN114146545A (en) * | 2020-11-19 | 2022-03-08 | 衢州科尔钙业科技有限公司 | Composite desulfurizer and preparation method and application thereof |
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| CN101229963A (en) * | 2008-01-07 | 2008-07-30 | 陕西亿利莱电力发展有限责任公司 | Coal-saving desulfurization synergistic additive for cement clinker calcination |
| CN101898109A (en) * | 2009-05-31 | 2010-12-01 | 北京三聚环保新材料股份有限公司 | Recyclable desulfurizer and preparation method thereof and regeneration method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654315A (en) * | 2018-05-08 | 2018-10-16 | 北京工业大学 | A kind of preparation method of rice hull ash/carbide slag system flue gas desulfurization and denitrification absorbent |
| CN108654315B (en) * | 2018-05-08 | 2020-11-27 | 北京工业大学 | Preparation method of flue gas desulfurization and denitrification absorbent of rice hull ash/carbide slag system |
| CN111589288A (en) * | 2020-07-10 | 2020-08-28 | 阳春新钢铁有限责任公司 | Desulfurization, denitrification and white removal device for ultralow emission of flue gas of sintering machine and process thereof |
| CN114146545A (en) * | 2020-11-19 | 2022-03-08 | 衢州科尔钙业科技有限公司 | Composite desulfurizer and preparation method and application thereof |
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