CN101804322A - High-strength dry type CO2 adsorbent for regeneration using river sediment as carrier and preparation method thereof - Google Patents
High-strength dry type CO2 adsorbent for regeneration using river sediment as carrier and preparation method thereof Download PDFInfo
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- CN101804322A CN101804322A CN201010163325A CN201010163325A CN101804322A CN 101804322 A CN101804322 A CN 101804322A CN 201010163325 A CN201010163325 A CN 201010163325A CN 201010163325 A CN201010163325 A CN 201010163325A CN 101804322 A CN101804322 A CN 101804322A
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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
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention relates to a high-strength dry type CO2 adsorbent for regeneration using river sediment as a carrier. The CO2 adsorbent comprises an absorbent, a carrier and an adhesive in the weight ratio of 2-6: 4-8: 1-2, wherein the absorbent is sodium carbonate or potassium carbonate; the carrier comprises carrier base material and carrier auxiliary material in the weight ratio of 4:1; the carrier base material is the river sediment; the carrier auxiliary material is clay and dewatering sludge of living sewage treating plants; and the adhesive is sodium silicate. The preparing method comprises the following steps of: mixing and batching the sediment which is used as raw material, dewatering, grinding, drying and forming, and sintering into finished products. The invention has the advantages of large specific surface, good porosity, high strength, abrasion resistance, and obvious adsorption and removal functions especially on carbon dioxide. The preparing method is simple and practical, has low cost, and is suitable for industrial production.
Description
Technical field
The invention belongs to CO2 dry absorbent and preparation field thereof, particularly relate to a kind of HIgh strength drying regeneration CO of river sediment as carrier
2Adsorbent and preparation thereof.
Background technology
Climate change has become the No.1 problem of human kind sustainable development.As everyone knows, CO2 is a kind of greenhouse gases of discharge capacity maximum.It is predicted the CO of China
2Total release will surpass the U.S. and become CO in about the year two thousand twenty
2No.1 discharging big country, the negative effect that bring more serious weather and ecological environment will certainly for the China and even the whole world like this, therefore, the discharging of the control CO2 that must adopt an effective measure as early as possible as early as possible slows down " greenhouse effects ".Consider that the branch of CO2 in the power-plant flue gas forces down the maturity with technical matters, chemical absorption method is a kind of reasonable selection to removing of CO2 in the flue gas comparatively speaking.Therefore the technology of utilizing the dry method absorbent to remove CO2 by gas-solid reaction has low, the recycling efficient height of energy consumption of reaction, equipment is not had advantages such as burn into non-secondary pollution and water consumption are little, has become present research focus.But that carrier uses in the dry method absorption process at present is AC (active carbon), TiO2, MgO, SiO2, Al2O3, NaX, CsNaX, CaO etc., and operating cost is higher, is not suitable for using on a large scale in the power plant.
River bottom mud is the important component part of the water environment ecosystem, is the intermediate zone that the water and soil boundary material replaces, and after external contamination source, lake was controlled, the bed mud that contains a large amount of pollutants often became the primary pollution source of water body in lake.At present, domestic improvement bottom mud in lake pollutes the main environment dredging technology that adopts, and the bed mud that dredging is come out is used as solid waste usually and is deposited in the storage mud field, and this method not only takies a large amount of soils, also environment is produced secondary pollution.
Summary of the invention
Technical problem to be solved by this invention provides the HIgh strength drying regeneration CO of river sediment as carrier
2Adsorbent and preparation thereof, this adsorbent specific area is big, porosity good, intensity is high, wear-resistant, and particularly to the adsorbing and removing effect highly significant of carbon dioxide, the preparation method is simple and practical, and cost is low, is suitable for suitability for industrialized production.
The HIgh strength drying regeneration CO of a kind of river sediment as carrier of the present invention
2Adsorbent, its component comprises: absorbent, carrier and binding agent, its weight ratio is 2～6: 4～8: 1～2, wherein absorbent is sodium carbonate or potash, carrier comprises 4: 1 carrier base material of weight ratio and carrier auxiliary material, carrier base material is a river bottom mud, and carrier auxiliary material is clay and sanitary sewage disposal factory dewatered sludge, and binding agent is liquid sodium silicate (an industry water glass).
The weight ratio of described absorbent, carrier and binding agent is 3: 6: 1 or 4: 5: 1.
Described river bottom mud is Suzhou River river bottom mud or other river bottom muds.
The HIgh strength drying regeneration CO of a kind of river sediment as carrier of the present invention
2The preparation of adsorbent method, comprise: (1) is with the dry removal of impurities of above-mentioned river bottom mud, with obtaining the particulate material that particle diameter is 50～100 μ m after the ball mill grinding screening, as carrier base material, again clay and sanitary sewage disposal factory dewatered sludge are mixed by 1: 1 weight ratio, dry back grind obtain particle diameter be the particulate material of 50～100 μ m as carrier auxiliary material, base-material and auxiliary material mix by weight at 4: 1 laggardly goes into ball mill and wears into the differential grain that particle diameter is 5～50 μ m altogether;
(2) micro mist grain, absorbent and the binding agent after will grinding adds in entry by weight at hundred to 2～6: 4～8: 1～2, adds defoamer and dispersant simultaneously, is mixed into mud;
(3) by spray dryer mud is made the spherolite that particle diameter is 50～100 μ m, calcine after the drying finished product.
Defoamer in the described step (2) is a silicone defoaming agent, and consumption is 0.5wt%.
Dispersant in the described step (2) is an anionic dispersing agent polycarboxylic acid sodium carbonate, and consumption is 5wt%.
Calcine technology in the described step (3) is 1100-1250 ℃ of calcining forming temperature, and sintering time is 0.5h.
As carrier base material, the main chemical compositions of river bottom mud comprises SiO2, Al2O3 etc. by river bottom mud in the present invention, all has than bigger serface and big voidage; And also contain the flux oxide that K2O, N2O, MgO, CaO, FeO etc. play fluxing action in the bed mud, and some compositions of getting angry, when material high temperature, can produce gas, both can the resolved vector problem of materials with river bottom mud as carrier, can dispose the part river bottom mud again, realize refuse reclamation, itself has viscosity bed mud, can reduce binding agent and use.Binding agent is a liquid sodium silicate, can play cementation on the one hand, also can increase the content of Na2O on the other hand, strengthens the function of fluxing, and makes more easy-formation of required particle.Use clay as additive, also can play cementation simultaneously; Adopt sanitary sewage disposal factory dewatered sludge as additive, the overwhelming majority is an organic matter in the dewatered sludge, and it burns the mistake rate can reach 66%, in the adsorbent roasting process, organic burning is lost and is made more micropores form, and helps increasing the adsorbent voidage like this, increases absorption efficiency.With the river bottom mud that is difficult to dispose as the synthetic adsorbent of carrier have that specific area is big, porosity good, excellent adsorption, intensity height, advantage such as wear-resistant, absorb with regeneration effect remarkable, simultaneously can refuse reclamation, realize the treatment of wastes with processes of wastes against one another.
Beneficial effect
(1) specific area of the present invention is big, porosity good, intensity is high, wear-resistant, particularly to the adsorbing and removing effect highly significant of carbon dioxide.
(2) preparation method of the present invention is simple and practical, and cost is low, is suitable for suitability for industrialized production.
(3) make full use of river bottom mud and sanitary sewage disposal factory dewatered sludge, efficiently solve the problem of river bottom mud and smuggled goods sludge treatment, realize with Fei Zhifei.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
1. component
A. absorbent: potash;
B. carrier: carrier base material is the Suzhou River river bottom mud, and carrier auxiliary material is that Guangxi white clay and Songjiang sanitary sewage disposal factory dewatered sludge mix base-material and auxiliary material weight ratio 4: 1 by 1: 1 weight ratio;
C. binding agent: industry water glass;
Weight ratio: absorbent: carrier: binding agent=3: 6: 1.
2. preparation technology
(1) with the dry screening of river bottom mud removal of impurities, with the particulate material that obtains particle diameter 50～100 μ m after the ball mill grinding screening, as carrier base material, again Guangxi white clay and the dry respectively back grinding of Songjiang sanitary sewage disposal factory dewatered sludge are obtained the particulate material that particle diameter is 50～100 μ m, mixed as carrier auxiliary material by weight 1: 1, base-material and auxiliary material mix the laggard micro mist grain that ball mill is worn into particle diameter 5～50 μ m altogether of going into by weight at 4: 1;
(2) micro mist grain, potash and the industry water glass after will grinding adds in the entry successively or simultaneously, make concentration of hydraulic mixture reach 40% approximately, add the silicone defoaming agent of 0.5wt% and the anionic dispersing agent polycarboxylic acid sodium carbonate of 5wt% simultaneously, be mixed into even mud;
(3) by spray dryer mud is made the spherolite that particle diameter is 50～100 μ m; Calcine 0.5h down at 1100-1250 ℃ after the spherolite drying and get finished product.
3. adsorption effect
(1) river bottom mud not only contacts carbon dioxide easily as adsorbing agent carrier, can also give the hydrophily and the high-specific surface area of the required moisture of adsorbable reaction.
(2) carry out in the waste gas carbon dioxide in the fluid bed and capture separating experiment, absorbent can reach about 90% the maximum material removal rate of CO2, and it is effective to resistance to wear in the quick solid cyclic process, remains unchanged substantially through circulation repeatedly.
Embodiment 2
1. component
Absorbent: sodium carbonate;
Carrier: carrier base material is the Suzhou River river bottom mud, and carrier auxiliary material is that Guangxi white clay and Songjiang sanitary sewage disposal factory dewatered sludge mix base-material and auxiliary material weight ratio 4: 1 by 1: 1 weight ratio;
Binding agent: industry water glass;
Weight ratio: absorbent: carrier: binding agent=4: 5: 1.
2. preparation technology
(1) with the dry removal of impurities of river bottom mud, with the particulate material that obtains particle diameter 50～100 μ m after the ball mill grinding screening, as carrier base material, again clay and the dry respectively back grinding of sanitary sewage disposal factory dewatered sludge are obtained the particulate material that particle diameter is 50～100 μ m, mixed as carrier auxiliary material by weight 1: 1, base-material and auxiliary material mix the laggard differential grain that ball mill is worn into particle diameter 5～50 μ m altogether of going into by weight at 4: 1;
(2) micro mist grain, sodium carbonate and the industry water glass after will grinding all adds in the entry, makes concentration of hydraulic mixture reach 40% approximately, adds the silicone defoaming agent of 0.5wt% and the anionic dispersing agent polycarboxylic acid sodium carbonate of 5wt% simultaneously, is mixed into even mud;
(3) by spray dryer mud is made the spherolite that particle diameter is 50～100 μ m; After the spherolite drying 1100-1250 ℃ calcine down 0.5h finished product.
3. adsorption effect
(1) river bottom mud not only contacts carbon dioxide easily as adsorbing agent carrier, can also give the hydrophily and the high-specific surface area of the required moisture of adsorbable reaction.
(2) carry out in the waste gas carbon dioxide in the fluid bed and capture separating experiment, absorbent can reach about 90% the maximum material removal rate of CO2, and it is effective to resistance to wear in the quick solid cyclic process, remains unchanged substantially through circulation repeatedly.
Claims (7)
1. the HIgh strength drying regeneration CO of a river sediment as carrier
2Adsorbent, its component comprises: absorbent, carrier and binding agent, its weight ratio is 2～6: 4～8: 1～2, wherein absorbent is sodium carbonate or potash, carrier comprises 4: 1 carrier base material of weight ratio and carrier auxiliary material, carrier base material is a river bottom mud, and carrier auxiliary material is clay and sanitary sewage disposal factory dewatered sludge, and binding agent is a sodium metasilicate.
2. the HIgh strength drying regeneration CO of a kind of river sediment as carrier according to claim 1
2Adsorbent is characterized in that: the weight ratio of described absorbent, carrier and binding agent is 3: 6: 1 or 4: 5: 1.
3. the HIgh strength drying regeneration CO of a kind of river sediment as carrier according to claim 1
2Adsorbent is characterized in that: described river bottom mud is Suzhou River river bottom mud or other river bottom muds.
4. the HIgh strength drying regeneration CO of a river sediment as carrier
2The preparation of adsorbent method comprises:
(1) with the dry removal of impurities of above-mentioned river bottom mud, with obtaining the particulate material that particle diameter is 50～100 μ m after the ball mill grinding screening, as carrier base material, again clay and 1: 1 weight ratio of sanitary sewage disposal factory dewatered sludge are mixed, dry back grind obtain particle diameter be the particulate material of 50～100 μ m as carrier auxiliary material, base-material and auxiliary material mix by weight at 4: 1 laggardly goes into ball mill and wears into the differential grain that particle diameter is 5～50 μ m altogether;
(2) micro mist grain, absorbent and the binding agent after will grinding adds in the entry by weight 2～6: 4～8: 1～2, adds defoamer and dispersant simultaneously, is mixed into mud;
(3) by spray dryer mud is made the spherolite that particle diameter is 50～100 μ m, calcine after the drying finished product.
5. the HIgh strength drying regeneration CO of a kind of river sediment as carrier according to claim 4
2The preparation of adsorbent method is characterized in that: the defoamer in the described step (2) is a silicone defoaming agent, and consumption is 0.5wt%.
6. the HIgh strength drying regeneration CO of a kind of river sediment as carrier according to claim 4
2The preparation of adsorbent method is characterized in that: the dispersant in the described step (2) is an anionic dispersing agent polycarboxylic acid sodium carbonate, and consumption is 5wt%.
7. the HIgh strength drying regeneration CO of a kind of river sediment as carrier according to claim 4
2The preparation of adsorbent method is characterized in that: the calcine technology in the described step (3) is 1100-1250 ℃ of calcining forming temperature, and sintering time is 0.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010163325A CN101804322A (en) | 2010-04-29 | 2010-04-29 | High-strength dry type CO2 adsorbent for regeneration using river sediment as carrier and preparation method thereof |
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| CN201010163325A CN101804322A (en) | 2010-04-29 | 2010-04-29 | High-strength dry type CO2 adsorbent for regeneration using river sediment as carrier and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961636A (en) * | 2010-09-13 | 2011-02-02 | 东南大学 | Method for modifying carbon dioxide solid absorbent |
| CN102718468A (en) * | 2012-07-13 | 2012-10-10 | 哈尔滨工业大学 | Method for manufacturing light ceramsite by using municipal sludge and dredged sediment |
| CN105536685A (en) * | 2015-12-24 | 2016-05-04 | 成都绿源新创环保科技有限公司 | Method for preparing sewage treatment adsorbent by comprehensively utilizing sludge |
| CN106268708A (en) * | 2016-08-15 | 2017-01-04 | 陈曦 | A kind of high-efficiency and continuous carbon dioxide recycle material for trapping and preparation method |
| CN106334517A (en) * | 2015-07-07 | 2017-01-18 | 云南民族大学 | Method for preparation of carbon dioxide adsorbent through modification of sediment simultaneously by rare earth and microwave heating |
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| CN1795979A (en) * | 2004-12-23 | 2006-07-05 | 韩国电力公社 | HIgh strength drying regeneration CO2 adsorbent |
| CN101239301A (en) * | 2008-03-03 | 2008-08-13 | 广西师范大学 | Stellerite smell-removing drying agent and preparation thereof |
| CN101269316A (en) * | 2008-05-06 | 2008-09-24 | 东南大学 | High-activity kalium group solid absorbing agent for removing CO2 in flue gas and preparation method thereof |
| CN201353499Y (en) * | 2009-02-09 | 2009-12-02 | 姜英杰 | Load type titanium dioxide catalyst |
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2010
- 2010-04-29 CN CN201010163325A patent/CN101804322A/en active Pending
Patent Citations (4)
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| CN1795979A (en) * | 2004-12-23 | 2006-07-05 | 韩国电力公社 | HIgh strength drying regeneration CO2 adsorbent |
| CN101239301A (en) * | 2008-03-03 | 2008-08-13 | 广西师范大学 | Stellerite smell-removing drying agent and preparation thereof |
| CN101269316A (en) * | 2008-05-06 | 2008-09-24 | 东南大学 | High-activity kalium group solid absorbing agent for removing CO2 in flue gas and preparation method thereof |
| CN201353499Y (en) * | 2009-02-09 | 2009-12-02 | 姜英杰 | Load type titanium dioxide catalyst |
Non-Patent Citations (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961636A (en) * | 2010-09-13 | 2011-02-02 | 东南大学 | Method for modifying carbon dioxide solid absorbent |
| CN102718468A (en) * | 2012-07-13 | 2012-10-10 | 哈尔滨工业大学 | Method for manufacturing light ceramsite by using municipal sludge and dredged sediment |
| CN106334517A (en) * | 2015-07-07 | 2017-01-18 | 云南民族大学 | Method for preparation of carbon dioxide adsorbent through modification of sediment simultaneously by rare earth and microwave heating |
| CN105536685A (en) * | 2015-12-24 | 2016-05-04 | 成都绿源新创环保科技有限公司 | Method for preparing sewage treatment adsorbent by comprehensively utilizing sludge |
| CN106268708A (en) * | 2016-08-15 | 2017-01-04 | 陈曦 | A kind of high-efficiency and continuous carbon dioxide recycle material for trapping and preparation method |
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Application publication date: 20100818 |