CN104496241A - Modification method for fly ashes from circulating fluidized bed boiler and application of modified fly ashes - Google Patents
Modification method for fly ashes from circulating fluidized bed boiler and application of modified fly ashes Download PDFInfo
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- CN104496241A CN104496241A CN201410831465.1A CN201410831465A CN104496241A CN 104496241 A CN104496241 A CN 104496241A CN 201410831465 A CN201410831465 A CN 201410831465A CN 104496241 A CN104496241 A CN 104496241A
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- China
- Prior art keywords
- flying dust
- fluid bed
- fly ashes
- circular fluid
- basalt
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the technical field of modified utilization of waste gas resources, and particularly relates to a modification method for fly ashes from a circulating fluidized bed boiler and an application of the modified fly ashes. The method comprises the following steps: firstly, carrying out mixing treatment on basalt as an aggregate together with an excitant, and controlling the particle size of the aggregate basalt and the particle condition of the excitant, so that the basalt microscopically changes under the premise of presence of the excitant; adding fly ashes of the circulating fluidized bed boiler, controlling the amount of the basalt, the excitant and the fly ashes, and combining the control on the physicochemical environment in the mixing process, so that the basalt, the excitant and the fly ashes act with one another, the basalt aggregate is pulverized, and the reinforced component in the fly ashes is improved, thus the components in the fly ashes are improved and neutralized, and therefore, the quality of the fly ashes is improved. The modified fly ashes can be greatly applied to the field of buildings; and secondary pollution to the environment and the retreatment cost of the fly ashes are avoided.
Description
Technical field
The present invention relates to the modification of waste gas resource and utilize technical field, especially a kind of circular fluid bed flying dust method of modifying and application thereof.
Background technology
Circular fluid bed flying dust refers to coal after mixing with sulphur-fixing agent (main component is Wingdale) in the solid waste of discharging after 850 ~ 900 DEG C of temperature combustions in fluidized-bed combustion boiler.Namely be exactly fluidized bed burned-coal sulfur solidifying technique, this technology is that coal dust and sulphur-fixing agent are carried out burn processing as can be seen here, makes a kind of technology that the sulphur in coal dust is fixed with the form of sulfurated lime.It is owing to having the various inferior fuel of incendivity, as high-sulfur dirty coal, coal gangue, mud coal, mine tailing, slag etc., namely has that coal-fired wide adaptability, efficiency of combustion are high, high-efficiency desulfurization, oxynitride (NO
x) discharge the advantages such as low, fuel pretreatment system is simple, and then obtain sulphur application admittedly widely.But, in this combustion processes, will along with the discharge of flying dust, if and then flying dust is not processed and applies again, the form being then equivalent to the sulfur dioxide gas discharged in the past to convert to calcium sulfate or sulfurated lime solid flying dust is emitted in atmospheric layer or native top layer, and then causes the secondary pollution of environment.
And coal combustion and sulfur fixation technology is while obtaining generalizing application, also should synchronously be solved for the flying dust process produced in circular fluid bed, but, due to the singularity of circular fluid bed flying dust itself, and then cause this flying dust to be difficult to the application obtained in a big way, and this reason mainly concentrates on: the understanding of people to the concrete composition of this kind of flying dust is comparatively shallow, flying dust vector is high, CaO content is high, SO
3mass concentration is high, vitreum is few, and due to the difference of the conditions such as raw coal composition, sulphur-fixing agent composition and fluidized-bed layer material, the composition fluctuation of circular fluid bed flying dust is also comparatively large, process and should use more difficult.
For this reason, application again for circular fluid bed flying dust needs to carry out modification utilization, and then have the process of investigator to flying dust to be studied, as " a kind for the treatment of process of circular fluid bed flying dust " that the patent No. is CN201110041227.7, the method be circulating fluidized bed flying dust is adjusted after, carbon content is wherein increased, and then returned burning again, or it can be used as the method in carbon dust preparation technology again, and then can find out, although this technology processes flying dust, but mainly in order to extract carbon wherein, and then the process that carbon utilized once again, further avoid carbon emission in atmospheric layer, and then make desulfurization, decarburization technique obtains and synchronously carries out.
But, have not been reported utilizing the technical publications of basalt modification flying dust, the appearance of the technical literature of flying dust is not utilized yet, therefore, this investigator is through continuous Exploration & stu dy, modification is carried out, for flying dust provides new selection in building field application by before the application of circular fluid bed flying dust.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of circular fluid bed flying dust method of modifying, circular fluid bed flying dust can be carried out modification, make to fly ash composition controlled and fix, and then can after circulating fluidized bed flyash ingredient being controlled and analyzes, added in concrete admixture, and then circular fluid bed flying dust is used for building materials field, facilitate the application of circular fluid bed flying dust, and then avoid the secondary pollution of flying dust, reduce the cost of building materials field, there is significant economic benefit and the value of environmental protection.
On this basis, the present invention is by the modification to flying dust, make concrete admixture can be mixed circular fluid bed flying dust by a large amount of, and then to reduce in fly ash emission environment the pollution that environment causes largely, reduce environmental pollution, reduce the reprocessing cost to circular fluid bed flying dust.
Be achieved particular by following technical scheme:
A kind of circular fluid bed flying dust method of modifying, be 2-5 part mix after with exciting agent according to parts by weight according to parts by weight 60-97 part by basalt, again its mixture is placed in grinding machine for grinding and becomes 190-290 order, joined in circular fluid bed flying dust again and mix, circular fluid bed flying dust is 1-40 part according to parts by weight; When joining in circular fluid bed flying dust, adopt the mode stirred while adding to add, stirring velocity is 50-70r/min, to be added complete after, adjustment stirring velocity is that 140-180r/min carries out stir process, and 3-4min to be mixed, can obtain modification circular fluid bed flying dust.
Described basalt is 50-90 object particle.
Described exciting agent is sodium sulfate.
Described sodium sulfate is 100-200 object powder.
Above-mentioned circular fluid bed flying dust method of modifying obtains modification circular fluid bed flying dust, and this flying dust is composite granule, for concrete admixture.
Compared with prior art, technique effect of the present invention is embodied in:
By basalt is first carried out combination treatment with exciting agent as aggregate, and control the granular size of this aggregate of basalt and the particle situation of exciting agent, and then there is micro-variations under the prerequisite that basalt is existed at exciting agent, then circular fluid bed flying dust is added wherein, and control basalt, exciting agent and flying dust amount, also combine the control to the physicochemical environment in mixing process, and then make basalt, exciting agent, flying dust is had an effect each other, and then while carrying out efflorescence basalt aggregate again, improve the intensifier in flying dust, and then make the composition in flying dust improve and neutralize, and then improve the quality of flying dust, make use that flying dust can be a large amount of at building field, avoid the secondary pollution of environment and the reprocessing cost to flying dust.
On this basis, the present invention is by the modification to flying dust, make concrete admixture can be mixed circular fluid bed flying dust by a large amount of, and then to reduce in fly ash emission environment the pollution that environment causes largely, reduce environmental pollution, reduce the reprocessing cost to circular fluid bed flying dust, make the flying dust in circular fluid bed after eliminating, obtain a large amount of utilizations.
And also for the amount in modification flying dust blending concrete has made the research and discovery of science, and then concrete quality can be guaranteed when ensure that blending, the performance of Concrete Structure.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
A kind of circular fluid bed flying dust method of modifying, be 2kg mix after with exciting agent according to parts by weight according to parts by weight 60kg by basalt, again its mixture is placed in grinding machine for grinding and becomes 190 orders, joined in circular fluid bed flying dust again and mix, circular fluid bed flying dust is 1kg according to parts by weight; When joining in circular fluid bed flying dust, the mode stirred while adding is adopted to add, stirring velocity is 50r/min, and in the process, to be added complete after, adjustment stirring velocity is that 140r/min carries out stir process, and 3min to be mixed, can obtain modification circular fluid bed flying dust.
Described basalt is 50 object particles.
Described exciting agent is sodium sulfate.
Described sodium sulfate is 100 object powder.
Embodiment 2
A kind of circular fluid bed flying dust method of modifying, be 5kg mix after with exciting agent according to parts by weight according to parts by weight 97kg by basalt, again its mixture is placed in grinding machine for grinding and becomes 290 orders, joined in circular fluid bed flying dust again and mix, circular fluid bed flying dust is 40kg according to parts by weight; When joining in circular fluid bed flying dust, the mode stirred while adding is adopted to add, stirring velocity is 70r/min, and in the process, to be added complete after, adjustment stirring velocity is that 180r/min carries out stir process, and 4min to be mixed, can obtain modification circular fluid bed flying dust.
Described basalt is 90 object particles.
Described exciting agent is sodium sulfate.
Described sodium sulfate is 200 object powder.
Embodiment 3
A kind of circular fluid bed flying dust method of modifying, be 3kg mix after with exciting agent according to parts by weight according to parts by weight 63kg by basalt, again its mixture is placed in grinding machine for grinding and becomes 200 orders, joined in circular fluid bed flying dust again and mix, circular fluid bed flying dust is 30kg according to parts by weight; When joining in circular fluid bed flying dust, the mode stirred while adding is adopted to add, stirring velocity is 60r/min, and in the process, to be added complete after, adjustment stirring velocity is that 170r/min carries out stir process, and 3.5min to be mixed, can obtain modification circular fluid bed flying dust.
Described basalt is 80 object particles.
Described exciting agent is sodium sulfate.
Described sodium sulfate is 160 object powder.
Test example: index performance is carried out to the circular fluid bed flying dust of embodiment 1, embodiment 2, embodiment 3 modification and tests according to GB/T1596-2005 " flyash in cement and concrete " standard, the requirement of test result conformance with standard, it the results are shown in Table shown in 1:
Table 1
As can be seen from the data presentation result of upper table, the performance index of the flying dust that the present invention is modified all can meet the requirement of standard, and part index number is also better than standard index, has significant progressive.
It is important to point out at this, above-described embodiment and test example are only limitted to be further elaborated technical scheme of the present invention and illustrate, are not the restriction to technical scheme of the present invention.
Claims (5)
1. a circular fluid bed flying dust method of modifying, it is characterized in that, be 2-5 part mix after with exciting agent according to parts by weight according to parts by weight 60-97 part by basalt, again its mixture is placed in grinding machine for grinding and becomes 190-290 order, joined in circular fluid bed flying dust again and mix, circular fluid bed flying dust is 1-40 part according to parts by weight; When joining in circular fluid bed flying dust, adopt the mode stirred while adding to add, stirring velocity is 50-70r/min, to be added complete after, adjustment stirring velocity is that 140-180r/min carries out stir process, stirs 3 ~ 4min, can obtain modification circular fluid bed flying dust.
2. circular fluid bed flying dust method of modifying as claimed in claim 1, it is characterized in that, described basalt is 50-90 object particle.
3. circular fluid bed flying dust method of modifying as claimed in claim 1, it is characterized in that, described exciting agent is sodium sulfate.
4. circular fluid bed flying dust method of modifying as claimed in claim 4, it is characterized in that, described sodium sulfate is 100-200 object powder.
5. the circular fluid bed flying dust method of modifying as described in any one of claim 1-5 obtains modification circular fluid bed flying dust, and this flying dust is composite granule, for concrete admixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831465.1A CN104496241A (en) | 2014-12-26 | 2014-12-26 | Modification method for fly ashes from circulating fluidized bed boiler and application of modified fly ashes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410831465.1A CN104496241A (en) | 2014-12-26 | 2014-12-26 | Modification method for fly ashes from circulating fluidized bed boiler and application of modified fly ashes |
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| CN104496241A true CN104496241A (en) | 2015-04-08 |
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| CN201410831465.1A Pending CN104496241A (en) | 2014-12-26 | 2014-12-26 | Modification method for fly ashes from circulating fluidized bed boiler and application of modified fly ashes |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080099122A1 (en) * | 2006-11-01 | 2008-05-01 | E. Khashoggi Industries Llc | Cementitious composites having wood-like properties and methods of manufacture |
| AU2011250735A1 (en) * | 2010-11-19 | 2012-06-07 | Baines Masonary Blocks Pty Ltd | A masonry block and a masonry wall construction |
| CN103342490A (en) * | 2013-07-02 | 2013-10-09 | 海南蓝岛环保产业股份有限公司 | Composite household garbage incinerator bottom slag coal ash for concrete |
| US20140264140A1 (en) * | 2013-03-14 | 2014-09-18 | The Catholic University Of America | High-strength geopolymer composite cellular concrete |
-
2014
- 2014-12-26 CN CN201410831465.1A patent/CN104496241A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080099122A1 (en) * | 2006-11-01 | 2008-05-01 | E. Khashoggi Industries Llc | Cementitious composites having wood-like properties and methods of manufacture |
| AU2011250735A1 (en) * | 2010-11-19 | 2012-06-07 | Baines Masonary Blocks Pty Ltd | A masonry block and a masonry wall construction |
| US20140264140A1 (en) * | 2013-03-14 | 2014-09-18 | The Catholic University Of America | High-strength geopolymer composite cellular concrete |
| CN103342490A (en) * | 2013-07-02 | 2013-10-09 | 海南蓝岛环保产业股份有限公司 | Composite household garbage incinerator bottom slag coal ash for concrete |
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Application publication date: 20150408 |
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