CN110983900B - Method for reducing raised dust in outdoor terrace reconstruction - Google Patents
Method for reducing raised dust in outdoor terrace reconstruction Download PDFInfo
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- CN110983900B CN110983900B CN201911168014.3A CN201911168014A CN110983900B CN 110983900 B CN110983900 B CN 110983900B CN 201911168014 A CN201911168014 A CN 201911168014A CN 110983900 B CN110983900 B CN 110983900B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/36—Coherent pavings made in situ by subjecting soil to stabilisation
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
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Abstract
The invention discloses a method for reducing raised dust by outdoor terrace reconstruction, which comprises the following steps: step one, modification of diatom ooze: adding the diatom ooze into the trigger solution for reaction for 20-30min at the reaction speed of 210-260r/min for 25-35min, then taking out and sending the diatom ooze into a calcining furnace for calcining at the calcining temperature of 500-1000 ℃ for 10-20min, and then carrying out freezing and thermalization treatment for 2-3 times. According to the invention, the diatom ooze is modified, the diatom ooze has high specific surface area and porosity, the triggering liquid can be fully absorbed in the triggering liquid, the triggering liquid is irradiated by ammonium molybdate under gamma rays and then is ultrasonically dispersed together with europium oxide in ionic liquid, and the triggering liquid is contacted with the internal structure of the diatom ooze.
Description
Technical Field
The invention relates to the technical field of dust emission reduction, in particular to a method for reducing dust emission by outdoor terrace modification.
Background
The terraces in civil engineering refer to indoor ground, outdoor terraces and the like. The method is to level (dig or fill) the original foundation and then carry out a floor construction layer. The construction layer is divided into an original soil layer, a base layer, a middle layer, a surface layer and the like; the dust is an open pollution source which enters the atmosphere due to the fact that dust on the ground is driven by wind power, man-made power and other power to fly, and is an important component of total suspended particles in the ambient air; the method utilizes rainwater resources to immediately clean and wash muddy water accumulated on the road after rainfall, is the most effective means for avoiding repeatedly forming raised dust after the soil on the road is dried by air, can simultaneously avoid forming raised dust by cleaning in sunny days, can greatly save cleaning water, and is a measure which is required to be immediately taken in vast towns in China at present; when the design and the construction of hardened road, pay attention to and strictly adopt reasonable horizontal slope of road surface and road edge drainage design, utilize natural rainfall runoff to erode clean road surface dust, can play the effect of doing half the effort doubly to reduce the raise dust pollution, be the important long-term measure of administering the raise dust pollution.
Silt and cement can be used in the current outdoor transformation, and silt, cement can produce a large amount of dust in mixing process, and the production of dust can cause certain destruction to the environment.
Disclosure of Invention
The invention aims to provide a method for reducing fugitive dust by outdoor terrace modification, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for reducing fugitive dust for outdoor terrace renovation, comprising the steps of:
step one, modification of diatom ooze: adding the diatom ooze into a trigger solution for reaction for 20-30min at the reaction speed of 210-260r/min for 25-35min, then taking out the diatom ooze, feeding the diatom ooze into a calcining furnace for calcining at the calcining temperature of 500-1000 ℃ for 10-20min, and then carrying out freezing and thermalization for 2-3 times;
step two, preparing a dust settling liquid raw material: 20-30 parts of modified diatom ooze, 15-25 parts of nano silicon dioxide, 10-20 parts of graphene, 2-6 parts of calcined kaolin powder and 55-65 parts of deionized water;
step three, preparing a dust reducing liquid: sequentially adding the modified diatom ooze, the nano-silica, the graphene, the calcined kaolin powder and the deionized water into a stirrer for stirring, wherein the stirring speed is 500-1000r/min, the stirring time is 35-45min, then stirring at a low speed of 200-500r/min for 20-30min, and standing for 1-2h after the stirring is finished to obtain a dust-reducing liquid;
step four, dust raising construction: and (3) treating dust generated by cement and sand through the dust-settling liquid in the third step, and sending the dust-settling liquid into the dust raising machine, wherein the spraying opening of the dust raising machine faces the dust, so that the dust-settling treatment is carried out on the raised dust.
Preferably, the diatom ooze porosity in the first step is 90-95%, and the specific surface area is 60-65m2/g。
Preferably, the diatom ooze has a porosity of 93.5% and a specific surface area of 62.5m2/g。
Preferably, the preparation method of the trigger solution comprises the following steps: radiating ammonium molybdate by gamma rays for 2-5min, then placing the ammonium molybdate and europium oxide together into ionic liquid for ultrasonic dispersion for 20-30min under the conditions of 230 ℃ at 210-10 MPa, wherein the ultrasonic power is 500-1000W, and obtaining trigger liquid after the ultrasonic dispersion is finished.
Preferably, the dose of the gamma ray is 1000-1500 KGy.
Preferably, the dose of gamma-rays is 1250 KGy.
Preferably, the freezing and thermalization treatment comprises the following specific steps: the diatom ooze is firstly frozen for 1-2h at-5-5 ℃, and then calcined for 10-20min at 300 ℃ under 200 ℃ after freezing.
Preferably, the diatom ooze is frozen at-2 ℃ for 1.5h, and then calcined at 250 ℃ for 15min after the freezing is finished.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the outdoor terrace can generate a large amount of raised dust in the process of modification, the diatom ooze is modified, the diatom ooze has very high specific surface area and porosity, the trigger liquid can be fully absorbed in the trigger liquid, the trigger liquid is irradiated by ammonium molybdate under gamma rays and then is ultrasonically dispersed in ionic liquid together with europium oxide, the trigger liquid is calcined and subjected to freezing and thermalization treatment after being contacted with the internal structure of the diatom ooze, so that a symbiotic system is formed with the internal structure of the diatom ooze, the trigger liquid can promote the adsorption of the diatom ooze to the dust, the nano-silica also has high specific surface area, and the addition of the graphene can enable the system to form a net system, so that the dust fall liquid system is more stable, the dust fall treatment of the dust fall liquid to the dust is improved, and the method for reducing the raised dust can obviously treat the raised dust.
(2) Examples 1-3 and comparative examples 1-2 show that the dust falling rate of example 3 of the invention can reach 83.3%, while the dust falling rate of comparative example 2 is 55.8%, and example 3 has 22.7% higher dust removal rate and 49.2% higher dust removal rate than comparative example 2, which indicates that the invention has significant improvement on dust treatment.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the method for reducing fugitive dust for outdoor terrace reconstruction of the embodiment comprises the following steps:
step one, modification of diatom ooze: adding the diatom ooze into the trigger solution to react for 20min, wherein the reaction speed is 210r/min, the reaction time is 25min, then taking out the diatom ooze, feeding the diatom ooze into a calcining furnace to calcine at the calcining temperature of 500 ℃ for 10min, and then carrying out freezing and thermalization treatment for 2 times;
step two, preparing a dust settling liquid raw material: 20 parts of modified diatom ooze, 15 parts of nano silicon dioxide, 10 parts of graphene, 2 parts of calcined kaolin powder and 55 parts of deionized water;
step three, preparing a dust reducing liquid: sequentially adding the modified diatom ooze, the nano-silica, the graphene, the calcined kaolin powder and the deionized water into a stirrer for stirring, wherein the stirring speed is 500r/min, the stirring time is 35min, then stirring at a low speed of 200r/min for 20min, and standing for 1h after the stirring is finished to obtain a dust-reducing liquid;
step four, dust raising construction: and (3) treating dust generated by cement and sand through the dust-settling liquid in the third step, and sending the dust-settling liquid into the dust raising machine, wherein the spraying opening of the dust raising machine faces the dust, so that the dust-settling treatment is carried out on the raised dust.
In the first step of this example, the diatom ooze porosity is 90%, and the specific surface area is 60m2/g。
The preparation method of the trigger solution of the embodiment comprises the following steps: radiating ammonium molybdate by adopting gamma rays for 2min, then placing the ammonium molybdate and europium oxide under the conditions of 210 ℃ and 6MPa for 4h, then sending the ammonium molybdate and the europium oxide together into ionic liquid for ultrasonic dispersion for 20min, wherein the ultrasonic power is 500W, and obtaining a trigger liquid after the ultrasonic treatment.
The dose of gamma rays in this example was 1000 KGy.
The freezing and thermalization treatment of the embodiment specifically comprises the following steps: the diatom ooze is frozen at-5 ℃ for 1h, and then calcined at 200 ℃ for 10min after the freezing is finished.
Example 2:
the method for reducing fugitive dust for outdoor terrace reconstruction of the embodiment comprises the following steps:
step one, modification of diatom ooze: adding diatom ooze into a trigger solution to react for 30min, wherein the reaction speed is 260r/min, the reaction time is 35min, then taking out, sending into a calcining furnace to calcine, the calcining temperature is 1000 ℃, calcining for 20min, and then carrying out freezing and thermalization treatment for 3 times;
step two, preparing a dust settling liquid raw material: 30 parts of modified diatom ooze, 25 parts of nano silicon dioxide, 20 parts of graphene, 6 parts of calcined kaolin powder and 65 parts of deionized water;
step three, preparing a dust reducing liquid: sequentially adding the modified diatom ooze, the nano-silica, the graphene, the calcined kaolin powder and the deionized water into a stirrer for stirring, wherein the stirring speed is 1000r/min, the stirring time is 45min, then stirring at a low speed of 500r/min for 30min, and standing for 2h after stirring to obtain a dust-reducing liquid;
step four, dust raising construction: and (3) treating dust generated by cement and sand through the dust-settling liquid in the third step, and sending the dust-settling liquid into the dust raising machine, wherein the spraying opening of the dust raising machine faces the dust, so that the dust-settling treatment is carried out on the raised dust.
In the first step of this example, the diatom ooze porosity was 95%, and the specific surface area was 65m2/g。
The preparation method of the trigger solution of the embodiment comprises the following steps: radiating ammonium molybdate by adopting gamma rays for 5min, then placing the ammonium molybdate and europium oxide under the conditions of 230 ℃ and 10MPa for 5h, then sending the ammonium molybdate and the europium oxide together into ionic liquid for ultrasonic dispersion for 30min, wherein the ultrasonic power is 1000W, and obtaining a trigger liquid after the ultrasonic dispersion is finished.
The dose of gamma radiation in this example was 1500 KGy.
The freezing and thermalization treatment of the embodiment specifically comprises the following steps: the diatom ooze is frozen at 5 ℃ for 2h, and then calcined at 300 ℃ for 20min after freezing.
Example 3:
the method for reducing fugitive dust for outdoor terrace reconstruction of the embodiment comprises the following steps:
step one, modification of diatom ooze: adding the diatom ooze into a trigger solution for reaction for 25min, wherein the reaction speed is 235r/min, the reaction time is 30min, then taking out, sending into a calcining furnace for calcining, the calcining temperature is 500-1000 ℃, the calcining time is 15min, and then carrying out freezing and thermalization treatment for 3 times;
step two, preparing a dust settling liquid raw material: 25 parts of modified diatom ooze, 20 parts of nano silicon dioxide, 15 parts of graphene, 4 parts of calcined kaolin powder and 60 parts of deionized water;
step three, preparing a dust reducing liquid: sequentially adding the modified diatom ooze, the nano-silicon dioxide, the graphene, the calcined kaolin powder and the deionized water into a stirrer for stirring, wherein the stirring speed is 750r/min, the stirring time is 40min, then stirring at a low speed of 350r/min for 25min, and standing for 1.5h after the stirring is finished to obtain a dust-reducing liquid;
step four, dust raising construction: and (3) treating dust generated by cement and sand through the dust-settling liquid in the third step, and sending the dust-settling liquid into the dust raising machine, wherein the spraying opening of the dust raising machine faces the dust, so that the dust-settling treatment is carried out on the raised dust.
The diatom ooze of this example had a porosity of 93.5% and a specific surface area of 62.5m2/g。
The preparation method of the trigger solution of the embodiment comprises the following steps: radiating ammonium molybdate by adopting gamma rays for 3.5min, then placing the ammonium molybdate and europium oxide together into ionic liquid for ultrasonic dispersion for 25min under the conditions of 220 ℃ and 8MPa, wherein the ultrasonic power is 750W, and obtaining trigger liquid after the ultrasonic dispersion is finished.
The dose of gamma rays in this example was 1250 KGy.
The freezing and thermalization treatment of the embodiment specifically comprises the following steps: the diatom ooze is frozen at 0 ℃ for 1.5h, and then calcined at 250 ℃ for 15min after the freezing is finished.
Comparative example 1.
The materials and preparation process were substantially the same as those of example 3, except that the diatom ooze was not treated in the trigger solution.
Comparative example 2.
The materials and preparation process were substantially the same as those of example 3, except that a conventional dust-settling method was used.
The results of the performance tests of examples 1 to 3 and comparative examples 1 to 2 are as follows
| Dust falling rate (%) | |
| Example 1 | 87.3 |
| Example 2 | 87.1 |
| Example 3 | 87.9 |
| Comparative example 1 | 83.3 |
| Comparative example 2 | 55.8 |
From examples 1-3 and comparative examples 1-2, it is shown that the dust falling rate of example 3 of the present invention is 83.3%, while the dust falling rate of comparative example 2 is 55.8%, and the dust removing rate of example 3 is increased by 22.7% and the dust improving rate is 49.2% compared with comparative example 2, which indicates that the present invention has significant improvement in dust removal treatment.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A method for reducing raised dust in outdoor terrace reconstruction is characterized by comprising the following steps:
step one, modification of diatom ooze: adding the diatom ooze into a trigger solution for reaction for 20-30min at the reaction speed of 210-260r/min for 25-35min, then taking out the diatom ooze, feeding the diatom ooze into a calcining furnace for calcining at the calcining temperature of 500-1000 ℃ for 10-20min, and then carrying out freezing and thermalization for 2-3 times;
step two, preparing a dust settling liquid raw material: 20-30 parts of modified diatom ooze, 15-25 parts of nano silicon dioxide, 10-20 parts of graphene, 2-6 parts of calcined kaolin powder and 55-65 parts of deionized water;
step three, preparing a dust reducing liquid: sequentially adding the modified diatom ooze, the nano-silica, the graphene, the calcined kaolin powder and the deionized water into a stirrer for stirring, wherein the stirring speed is 500-1000r/min, the stirring time is 35-45min, then stirring at a low speed of 200-500r/min for 20-30min, and standing for 1-2h after the stirring is finished to obtain a dust-reducing liquid;
step four, dust raising construction: treating dust generated by cement and sand through the dust-settling liquid in the third step, feeding the dust-settling liquid into a dust raising machine, and enabling a spraying opening of the dust raising machine to face the dust so as to perform dust-settling treatment on the raised dust;
the preparation method of the trigger solution comprises the following steps: radiating ammonium molybdate by gamma rays for 2-5min, then placing the ammonium molybdate and europium oxide together into ionic liquid for ultrasonic dispersion for 20-30min under the conditions of 230 ℃ at 210-10 MPa, wherein the ultrasonic power is 500-1000W, and obtaining trigger liquid after the ultrasonic dispersion is finished.
2. A method for outdoor apron renovation to reduce flying dust according to claim 1, characterized in thatIn the step one, the diatom ooze porosity is 90-95%, and the specific surface area is 60-65m2/g。
3. A method for outdoor lawn improvement to reduce raise dust according to claim 2, wherein said diatom ooze porosity is 93.5%, and specific surface area is 62.5m2/g。
4. The method for reducing raised dust in outdoor lawn reconstruction as claimed in claim 1, wherein the dose of gamma ray is 1000-.
5. A method for reducing raise dust of outdoor terrace according to claim 4, characterized in that the dose of said gamma ray is 1250 KGy.
6. The method for reducing raised dust of outdoor terrace according to claim 1, wherein the specific steps of the freezing and thermalization treatment are as follows: the diatom ooze is firstly frozen for 1-2h at-5-5 ℃, and then calcined for 10-20min at 300 ℃ under 200 ℃ after freezing.
7. The method for reducing raise dust of outdoor terrace according to claim 6, wherein the diatom ooze is frozen at-2 ℃ for 1.5h, and then calcined at 250 ℃ for 15min after the freezing is finished.
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| US3725520A (en) * | 1970-04-24 | 1973-04-03 | Nippon Ekika Seikei Kk | Method for preparing a porous synthetic thermoplastic film or sheet |
| YU48437B (en) * | 1990-12-21 | 1998-07-10 | Hoechst Aktiengesellschaft | GRANULATE OF AGRICULTURE OF BIOMASS SALINOMYCIN WHICH HAS A GOOD FLOW ABILITY, IS DUST, AND HAS AN UNLIMITED BIOLOGICAL USE OF THE ACTIVE SUBSTANCE AND PROCEDURE FOR ITS OBTAINING IT |
| CN103834364B (en) * | 2014-03-26 | 2015-07-22 | 广州普凯环保科技有限公司 | White dust suppressant and preparation method and application thereof |
| CN104559932B (en) * | 2015-01-27 | 2016-08-17 | 西安科技大学 | A kind of coal dust depressor and preparation method thereof |
| CN106701024B (en) * | 2017-02-21 | 2019-04-19 | 济南大学 | Road dust suppressant and its preparation and construction method |
| CN109181643A (en) * | 2017-03-03 | 2019-01-11 | 侯英翔 | Metallic ore, nonmetallic ore and coal mine dig lane, when opencast mining, dust-removing method |
| CN107384318B (en) * | 2017-08-30 | 2020-06-26 | 中南大学 | Application of inorganic nano material in dust suppression |
| CN108949110A (en) * | 2018-08-02 | 2018-12-07 | 佛山陵朝新材料有限公司 | A kind of preparation method of moist type water lock dust suppressant |
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