CN103833043A - Sodium modifying method of calcium bentonite - Google Patents
Sodium modifying method of calcium bentonite Download PDFInfo
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- CN103833043A CN103833043A CN201410070559.1A CN201410070559A CN103833043A CN 103833043 A CN103833043 A CN 103833043A CN 201410070559 A CN201410070559 A CN 201410070559A CN 103833043 A CN103833043 A CN 103833043A
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Abstract
The invention provides a sodium modifying method of calcium bentonite, comprises the following steps: grinding the calcium bentonite to obtain the calcium bentonite powder, atomizing a modifier solution, mixing and sufficiently contacting with the calcium bentonite powder mixed with hot air so that the calcium bentonite is modified by the modifier. The sodium modifying method of calcium bentonite adopts an atomizing spray technology so that the calcium bentonite powder can maximally contact with the modifier, the dosage of the modifier is reduced, the modifying speed is improved and the calcium bentonite powder is also completely modified, the utilization rate of the raw material is high, and the modifying effect is high.
Description
Technical field
The invention belongs to engineering materials field, particularly a kind of is mainly to utilize semidrying calcium-base bentonite to be modified as to the method for sodium bentonite.
Background technology
GCL is the material that is mainly used in the antiseeps such as artificial lake's water scenery, refuse landfill, underground garage, roof garden, pond, oil depot and chemical stockyard, mainly that the wilkinite of high-expansion is filled between special composite earthwork cloth and non-woven fabrics, wilkinite while meeting water in pad forms even highdensity gluey waterproof layer, the seepage of effective anti-sealing.
Conventional wilkinite comprises calcium-base bentonite and sodium bentonite, and because the distribution of calcium-base bentonite is in the world far extensively in sodium bentonite, therefore calcium-base bentonite is most widely used wilkinite.But when being only 3 times of left and right of own vol by its expansion of calcium-base bentonite, and sodium bentonite can adsorb the water of five times of own wts while meeting water, volumetric expansion to original 15-17 doubly more than; Therefore the waterproof effect of sodium base waterproof blanket is better than the waterproof blanket that calcium-base bentonite does far away.But because sodium bentonite distributes less, price is far above calcium-base bentonite, therefore except strengthening finding sodium bentonite, calcium-base bentonite carried out to modification and become sodium bentonite a kind of good method of also can yet be regarded as.
The method of at present calcium-base bentonite being carried out to sodium modification has suspension method, extrusion process, method of piling, wheel to roll over method, duplex method, first supercritical processing method and Raymond mill method, all there is to a certain extent defect, as easily caused secondary pollution, consume energy high, equipment is huge, modified effect is poor, equipment loss is large, cost is high and modification after treatment process numerous and diverse etc.
Summary of the invention
Goal of the invention: in order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide that a kind of cost is low, efficiency is high, the simple calcium-base bentonite method of modifying of technique.
Technical scheme: a kind of calcium-base bentonite modified device provided by the invention, comprises reactor (1), atomisation unit (2), Venturi tube (3); Described reactor (1) sidewall is provided with powder import (4), bottom is provided with discharge port (5); Described atomisation unit (2) comprises the properties-correcting agent tank (6) and the atomizing nozzle (7) that connect by liquid-inlet pipe (8), and described atomizing nozzle (7) is located in reactor (1), and described liquid-inlet pipe (8) is provided with force (forcing) pump (9); Described Venturi tube (3) is connected with powder import (4).
As improvement, the aperture of described atomizing nozzle (7) is 0.1～0.6mm.
The present invention also provides a kind of method of modifying of calcium-base bentonite, comprises the following steps: calcium-base bentonite is ground to obtain to calcium-base bentonite powder; Will be after modifier solution atomization mix and fully contact with the calcium-base bentonite powder that is mixing warm air, thereby making the agent modification that is modified of calcium-base bentonite powder.
More specifically, the method for modifying of described calcium-base bentonite, comprises the following steps:
(1) more than calcium-base bentonite is milled to 100 orders, obtain calcium-base bentonite powder;
(2) by modifier solution after atomisation unit atomization, spray in reactor; Simultaneously by the calcium-base bentonite powder that is mixing warm air in Venturi tube sucting reaction device; The calcium-base bentonite powder that is mixing warm air mixes in reaction unit with modifier solution and fully contacts, thereby makes the agent modification that is modified of calcium-base bentonite powder, and the while, by hot-air dry, obtains dry sodium bentonite.
Wherein, in step (1), the colloid index of described calcium-base bentonite is more than 40ml/15g, and expansion capacity is more than 4ml/g.
Wherein, in step (2), described properties-correcting agent is selected from one or more in sodium carbonate, sodium hydroxide, Sodium Fluoride and sodium bicarbonate; The massfraction of described modifier solution is 10～17%.
Wherein, in step (2), the temperature of described warm air is 100～200 DEG C.
Wherein, in step (2), the mass rate of described modifier solution is 21～28% of calcium-base bentonite powder quality flow.
Beneficial effect: calcium-base bentonite modified device provided by the invention is simple in structure, flow is adjustable, with low cost, operation, equipment is simple, floor space is few, less energy consumption and easy to use.
Bentonite Modification Technologies provided by the invention has adopted atomisation technology, make calcium-base bentonite powder and maximized contact of properties-correcting agent energy, reduced properties-correcting agent consumption, improved the speed of modification, also can realize calcium-base bentonite powder is carried out to complete modification, raw material availability is high, modified effect good simultaneously.
Brief description of the drawings
Fig. 1 is calcium-base bentonite sodium modification equipment provided by the invention;
Fig. 2 is the process flow sheet of calcium-base bentonite sodium modification method provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is made and being further illustrated.
Calcium-base bentonite modified device, comprises reactor (1), atomisation unit (2), Venturi tube (3); Described reactor (1) sidewall is provided with powder import (4), bottom is provided with discharge port (5); Described atomisation unit (2) comprises the properties-correcting agent tank (6) and the atomizing nozzle (7) that connect by liquid-inlet pipe (8), and described atomizing nozzle (7) is located in reactor (1), and described liquid-inlet pipe (8) is provided with force (forcing) pump (9); Described Venturi tube (3) is connected with powder import (4); Wherein, the aperture of described atomizing nozzle (7) is that 0.1～0.6mm all can realize object of the present invention.
Calcium-base bentonite sodium modification method, prepares sodium bentonite thereby adopt atomization that properties-correcting agent atomization is carried out to atomization modification to calcium-base bentonite, and key step comprises:
1) selection of calcium-base bentonite
Selecting natural calcium base bentonite is main raw material, and its colloid index is more than 40ml/15g, and expansion capacity is more than 4ml/g; More than choosing and using after calcium-base bentonite and to be milled to 100 orders.
2) preparation of properties-correcting agent
The modifier solution of sodium carbonate, sodium hydroxide and Sodium Fluoride that preparation massfraction is 10～17%;
3) modification
The calcium-base bentonite powder that is mixing warm air sucks from Venturi tube, and sprays in reactor 1, and the temperature of warm air is controlled at 100～200 DEG C; Meanwhile, modifier solution is aspirated by liquid-inlet pipe 8 and distributes to atomizing nozzle 7 through force (forcing) pump 9 by fluid inlet, then in reactor 1, eject droplet by atomizing nozzle 4, be evenly distributed in reactor 1; The mass rate of modifier solution is 21～28% of calcium-base bentonite powder quality flow; The calcium-base bentonite powder spraying into and the collision of the modifier solution droplet of suspension, and the agent solution droplet parcel that is modified, make calcium-base bentonite fully contact with properties-correcting agent, thereby realize the complete modification to calcium-base bentonite; Meanwhile, the moisture that properties-correcting agent is brought into is evaporated rapidly and the wilkinite after sodium is dried.
4) packaging.
Dried powder drops in dress system bottom, and it be can be made into sodium bentonite finished product from bottom of device collecting packing.
Claims (8)
1. a method of modifying for calcium-base bentonite, is characterized in that: modified device comprises reactor (1), atomisation unit (2), Venturi tube (3); Described reactor (1) sidewall is provided with powder import (4), bottom is provided with discharge port (5); Described atomisation unit (2) comprises the properties-correcting agent tank (6) and the atomizing nozzle (7) that connect by liquid-inlet pipe (8), and described atomizing nozzle (7) is located in reactor (1), and described liquid-inlet pipe (8) is provided with force (forcing) pump (9); Described Venturi tube (3) is connected with powder import (4).
2. a kind of calcium-base bentonite modified device according to claim 1, is characterized in that: the aperture of described atomizing nozzle (7) is 0.1～0.6mm.
3. a method of modifying for calcium-base bentonite, is characterized in that: comprise the following steps: calcium-base bentonite is ground to obtain to calcium-base bentonite powder; Will be after modifier solution atomization mix and fully contact with the calcium-base bentonite powder that is mixing warm air, thereby making the agent modification that is modified of calcium-base bentonite powder.
4. the method for modifying of a kind of calcium-base bentonite according to claim 3, is characterized in that: comprise the following steps:
(1) more than calcium-base bentonite is milled to 100 orders, obtain calcium-base bentonite powder;
(2) by modifier solution after atomisation unit atomization, spray in reactor; Simultaneously by the calcium-base bentonite powder that is mixing warm air in Venturi tube sucting reaction device; The calcium-base bentonite powder that is mixing warm air mixes in reaction unit with modifier solution and fully contacts, thereby makes the agent modification that is modified of calcium-base bentonite powder, and the while, by hot-air dry, obtains dry sodium bentonite.
5. the method for modifying of a kind of calcium-base bentonite according to claim 4, is characterized in that: in step (1), the colloid index of described calcium-base bentonite is more than 40ml/15g, and expansion capacity is more than 4ml/g.
6. the method for modifying of a kind of calcium-base bentonite according to claim 4, is characterized in that: in step (2), described properties-correcting agent is selected from one or more in sodium carbonate, sodium hydroxide, Sodium Fluoride and sodium bicarbonate; The massfraction of described modifier solution is 10～17%.
7. the method for modifying of a kind of calcium-base bentonite according to claim 4, is characterized in that: in step (2), the temperature of described warm air is 100～200 DEG C.
8. the method for modifying of a kind of calcium-base bentonite according to claim 4, is characterized in that: in step (2), the mass rate of described modifier solution is 21～28% of calcium-base bentonite powder quality flow.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016709A (en) * | 2014-06-17 | 2014-09-03 | 河海大学 | Preparation method of porous sodium-based bentonite particles |
| CN105600978A (en) * | 2015-11-18 | 2016-05-25 | 苏浩强 | Cleaning device suitable for acidic industrial wastewater |
| CN105601000A (en) * | 2015-11-18 | 2016-05-25 | 苏浩强 | Acidic electroplating waste liquid purifying system |
| CN106311122A (en) * | 2016-11-19 | 2017-01-11 | 郑州游爱网络技术有限公司 | Resin production reactor facilitating full mixing |
| CN107020062A (en) * | 2017-06-06 | 2017-08-08 | 钦州学院 | Chemical reactor for liquid-solid phase |
| CN109422269A (en) * | 2017-08-24 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of preparation method of sodium bentonite |
| CN110980755A (en) * | 2019-12-31 | 2020-04-10 | 湖北三鼎科技有限公司 | Preparation method of high-expansion-times sodium bentonite |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016709A (en) * | 2014-06-17 | 2014-09-03 | 河海大学 | Preparation method of porous sodium-based bentonite particles |
| CN104016709B (en) * | 2014-06-17 | 2015-08-26 | 河海大学 | A kind of preparation method of porous Na-bentonite soil particle |
| CN105600978A (en) * | 2015-11-18 | 2016-05-25 | 苏浩强 | Cleaning device suitable for acidic industrial wastewater |
| CN105601000A (en) * | 2015-11-18 | 2016-05-25 | 苏浩强 | Acidic electroplating waste liquid purifying system |
| CN105600978B (en) * | 2015-11-18 | 2018-10-09 | 苏浩强 | A kind of cleaning device suitable for acidic industrial effluent |
| CN106311122A (en) * | 2016-11-19 | 2017-01-11 | 郑州游爱网络技术有限公司 | Resin production reactor facilitating full mixing |
| CN107020062A (en) * | 2017-06-06 | 2017-08-08 | 钦州学院 | Chemical reactor for liquid-solid phase |
| CN109422269A (en) * | 2017-08-24 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of preparation method of sodium bentonite |
| CN110980755A (en) * | 2019-12-31 | 2020-04-10 | 湖北三鼎科技有限公司 | Preparation method of high-expansion-times sodium bentonite |
| CN110980755B (en) * | 2019-12-31 | 2023-04-21 | 湖北三鼎科技有限公司 | Preparation method of high-expansion sodium-base bentonite |
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