CN110468649B - Photocatalytic permeable pavement activity recovery device and method - Google Patents
Photocatalytic permeable pavement activity recovery device and method Download PDFInfo
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- CN110468649B CN110468649B CN201910723539.2A CN201910723539A CN110468649B CN 110468649 B CN110468649 B CN 110468649B CN 201910723539 A CN201910723539 A CN 201910723539A CN 110468649 B CN110468649 B CN 110468649B
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- photocatalytic
- pressure water
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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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
- E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
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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
- E01C9/00—Special pavings; Pavings for special parts of roads or airfields
Abstract
The invention relates to a photocatalytic permeable pavement activity recovery device and a photocatalytic permeable pavement activity recovery method, belongs to the technical field of engineering machinery, and is used for solving the problems that the water permeability of photocatalytic permeable concrete is reduced, the photocatalytic performance is gradually deteriorated due to the fact that active sites on the surface of a catalyst are gradually occupied, and the original functional requirements are difficult to meet. The method comprises the steps of firstly, removing large-particle solid impurities by adopting a high-pressure water flushing mode, dredging pores and recovering the water permeability; the second step adopts alkali liquor spraying, and mainly corrodes TiO in the photocatalytic road surface2The inorganic deposit on the surface recovers the photocatalytic activity without damaging the durability of the pavement material; thirdly, low-pressure water is adopted for flushing to remove soluble impurities; finally high-temperature air washing is carried out to remove TiO2The organic adsorbate attached to the surface restores the photocatalytic activity. According to the actual condition of the road surface, various parameters and the vehicle speed are set, the operation vehicle moves forwards along the road surface at a constant speed, and the activity of the photocatalytic permeable road surface can be recovered.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a photocatalytic permeable pavement activity recovery device and a photocatalytic permeable pavement activity recovery method.
Background
With the rise of sponge city construction, permeable pavement materials such as permeable concrete and permeable pavement are widely applied to sponge city foundationsAnd (5) infrastructure construction. TiO 22Has strong photocatalytic performance, can degrade organic matters and nitrogen oxides, and is widely used as an important environmental material. Adding TiO into the mixture2The porous concrete or the pavement brick is loaded to prepare the photocatalytic pavement brick or the photocatalytic porous concrete, so that the water permeability effect of the pavement can be achieved, and the air purification function can be realized. However, as the service life increases, the water permeability of the photocatalytic pervious concrete is reduced due to the plugging of dust, mud, impurities and the like, and the photocatalytic performance is gradually deteriorated due to the active sites on the surface of the catalyst being gradually occupied, so that the original functional requirements are difficult to meet.
Therefore, an activity recovery device is needed to improve the water permeability and recover the photocatalytic effect thereof, so as to solve the problem of unstable service of the photocatalytic permeable pavement.
Disclosure of Invention
Aiming at the function degradation mechanism of photocatalytic permeable concrete, the invention provides a photocatalytic permeable pavement activity recovery device and a photocatalytic permeable pavement activity recovery method, which can improve the water permeability, recover the photocatalytic effect and solve the problem of unstable service of the photocatalytic permeable pavement.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a photocatalytic permeable pavement activity recovery device comprises an operation vehicle, wherein the operation vehicle comprises a vehicle body and guide wheels, a first mechanism, a second mechanism and a third mechanism are sequentially arranged on one side, close to a pavement, of the vehicle body along the same direction as the traveling direction of a vehicle head, the first mechanism comprises a water tank, a high-pressure water pump and a low-pressure water pump, the high-pressure water pump and the low-pressure water pump are respectively communicated with the water tank, and the high-pressure water pump and the low-pressure water pump are respectively connected with a high-pressure water nozzle and a low-pressure water nozzle which are arranged at the bottom end of the vehicle body through water pipes; the second mechanism comprises an alkaline liquid tank and an alkaline liquid pipe, the alkaline liquid tank is connected with an alkaline liquid spray head arranged at the bottom end of the vehicle body through the alkaline liquid pipe, and the alkaline liquid spray head is arranged between the high-pressure water spray head and the low-pressure water spray head; the third mechanism comprises a high-temperature drying device, the high-temperature drying device comprises a fan and an electric heating wire, and the fan is connected with an air outlet formed in the bottom end of the vehicle body through an air pipe.
Compared with the prior art, the invention has the beneficial technical effects as follows:
(1) according to the photocatalytic permeable pavement activity recovery device provided by the invention, a high-pressure water flushing mode is adopted in the first step, large-particle solid impurities are removed, pores are dredged, and the water permeability is recovered; the second step adopts alkali liquor spraying, and mainly corrodes TiO in the photocatalytic road surface2The inorganic deposit on the surface recovers the photocatalytic activity without damaging the durability of the pavement material; thirdly, low-pressure water is adopted for flushing to remove soluble impurities; finally high-temperature air washing is carried out to remove TiO2The organic adsorbate attached to the surface restores the photocatalytic activity. According to the actual condition of the road surface, various parameters and the vehicle speed are set, the operation vehicle moves forwards along the road surface at a constant speed, and the activity of the photocatalytic permeable road surface can be recovered.
(2) The method for restoring the activity of the photocatalytic permeable pavement, provided by the invention, is simple and convenient to operate, simple and convenient to set parameters, and can simultaneously solve the problems of reduction of the water permeability of the photocatalytic permeable pavement and reduction of the photocatalytic activity. The device has strong refitting operability and can be used on multiple platforms. In addition, the method has great significance for recovering the using function of the photocatalytic permeable pavement and saving later maintenance cost.
Furthermore, in order to obtain materials conveniently and save cost, the operation vehicle is a two-axle engineering flat car.
Further, the alkali liquor in the alkali liquor tank is one of a sodium hydroxide aqueous solution or a potassium hydroxide aqueous solution with the concentration of 10% -20%. Considering that the lye is intended to corrode TiO2The inorganic deposit on the surface is easy to corrode the skin and damage the skin due to the alkali liquor splashed by improper operation, so that the alkali liquor with low concentration is selected as far as possible during operation.
Further, the fan is a blower. The air blower is used for blowing air, so that garbage dust particles which are distributed thickly on the road surface can be blown, and the road sweeper is convenient to clean.
Furthermore, tap water is contained in the water tank. The tap water is respectively pumped by the high-pressure water pump or the low-pressure water pump and then is converted into high-pressure water or low-pressure water, so that the permeable pavement is flushed.
The invention also provides a recovery method by utilizing the photocatalytic permeable pavement activity recovery device, which comprises the following steps:
the method comprises the following steps: filling tap water in a water tank of the operation vehicle, filling a certain volume of alkali liquor in the alkali liquor tank, and driving the operation vehicle to the road surface to be recovered;
step two: opening a high-pressure water pump and a high-pressure water spray head to wash the pavement so as to remove large-particle solid impurities in the pervious concrete of the pavement;
step three: after the second step is finished, closing the high-pressure water pump and the high-pressure water spray head, and opening the alkali liquor spray head to corrode and dissolve inorganic sediments on the surface of the permeable concrete of the pavement;
step four: after the third step is finished, closing the alkali liquor spray head, and opening the low-pressure water pump and the low-pressure water spray head to remove soluble impurities on the surface of the permeable concrete of the pavement;
step five: and turning on a power switch of the fan and the electric heating wire to generate high-temperature air so as to remove adsorptive organic matters on the permeable concrete of the pavement.
Drawings
Fig. 1 is a schematic structural diagram of a photocatalytic permeable pavement activity recovery device in an embodiment of the invention.
In the figure:
10-a vehicle body, 11-a water tank, 12-a high-pressure water pump, 13-a low-pressure water pump, 14-a high-pressure water nozzle and 15-a low-pressure water nozzle; 20-a steering wheel; 31-an alkaline liquid box and 32-an alkaline liquid spray head; 41-a fan, 42-an electric heating wire and 43-an air outlet.
Detailed Description
The following describes the photocatalytic permeable pavement activity recovery device and the photocatalytic permeable pavement activity recovery method in detail with reference to the accompanying drawings and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. For convenience of description, the directions of "up" and "down" described below are the same as the directions of "up" and "down" in the drawings, but this is not a limitation of the technical solution of the present invention.
The main reason for the reduction of the water permeability of the pervious concrete is that the pores are blocked by solid impurities, and meanwhile, the circulation and diffusion of polluted gas in the matrix are reduced, so that the pervious concrete is not beneficial to photocatalytic degradation. The main reasons for the decrease in the activity of the photocatalyst are: (1) active sites on the surface of the photocatalyst are occupied, and the photocatalyst cannot adsorb water, so that active groups with strong oxidizing property are generated; (2) the photocatalyst surface is covered with organic or inorganic substances, so that the polluted gas cannot be adsorbed. Therefore, the key for recovering the activity of the photocatalytic permeable pavement is to dredge the pore and remove the sediment on the surface of the photocatalyst. The invention aims to provide an activity (function) recovery device aiming at the problem of function degradation of photocatalytic porous concrete or photocatalytic pavement bricks.
The structural composition of the photocatalytic permeable pavement activity restoration device provided by the invention is described in detail below with reference to fig. 1.
Example one
Referring to fig. 1, a photocatalytic permeable pavement activity recovery device comprises an operation vehicle, the operation vehicle comprises a vehicle body 10 and a guide wheel 20, a first mechanism, a second mechanism and a third mechanism are sequentially arranged on one side of the vehicle body 10 close to a pavement along the same direction as the vehicle head, the first mechanism comprises a water tank 11, a high-pressure water pump 12 and a low-pressure water pump 13 which are respectively communicated with the water tank 11, and the high-pressure water pump 12 and the low-pressure water pump 13 are respectively connected with a high-pressure water nozzle 14 and a low-pressure water nozzle 15 which are arranged at the bottom end of the vehicle body 10 through water pipes; the second mechanism comprises an alkaline liquid tank 31 and an alkaline liquid pipe, the alkaline liquid tank 31 is connected with an alkaline liquid spray head 32 arranged at the bottom end of the side wall 10 of the vehicle body through the alkaline liquid pipe, and the alkaline liquid spray head 32 is arranged between the high-pressure water spray head 14 and the low-pressure water spray head 15; the third mechanism comprises a high-temperature drying device, the high-temperature drying device comprises a fan 41 and an electric heating wire 42, and the fan 41 is connected with an air outlet 43 arranged at the bottom end of the vehicle body 10 through an air pipe.
Specifically, aiming at the function degradation mechanism of the photocatalytic pervious concrete, the inventor develops a photocatalytic pervious pavement activity recovery device which can improve the water permeability and recover the water permeabilityThe photocatalysis effect solves the problem of unstable service of the photocatalysis permeable pavement. The method is mainly divided into four steps to deeply clean the photocatalytic water-permeable pavement bricks. Firstly, removing large-particle solid impurities by adopting a high-pressure water flushing mode, dredging pores and recovering the water permeability; the second step adopts alkali liquor spraying, and mainly corrodes TiO in the photocatalytic road surface2The inorganic deposit on the surface recovers the photocatalytic activity without damaging the durability of the pavement material; thirdly, low-pressure water is adopted for flushing to remove soluble impurities; finally high-temperature air washing is carried out to remove TiO2The organic adsorbate attached to the surface restores the photocatalytic activity. According to the actual condition of the road surface, various parameters and the vehicle speed are set, the operation vehicle moves forwards along the road surface at a constant speed, and the activity of the photocatalytic permeable road surface can be recovered.
In this embodiment, more preferably, the operation vehicle is a two-axle engineering flat car for convenience of material drawing and cost saving.
In this embodiment, it is more preferable that the lye tank 31 contains one of a 10% to 20% aqueous solution of sodium hydroxide or an aqueous solution of potassium hydroxide. Considering that the lye is intended to corrode TiO2The inorganic deposit on the surface is easy to corrode the skin and damage the skin due to the alkali liquor splashed by improper operation, so that the alkali liquor with low concentration is selected as far as possible during operation.
In the present embodiment, it is more preferable that the blower 41 is a blower. The air blower is used for blowing air, so that garbage dust particles which are distributed thickly on the road surface can be blown, and the road sweeper is convenient to clean. The cold wind generated by the blower is heated by the heating wire 42, and thus the blown wind is high temperature wind. The air volume is controlled by the number of revolutions of the blower 41, and the temperature of the air is controlled by the power of the heating wire 42. Of course, other similar machines capable of generating high-temperature air may be used to achieve the effect of generating high-temperature air, and the specific type of the fan 41 is not limited herein.
In the present embodiment, tap water is preferably contained in the water tank 11. The tap water is respectively pumped by the high-pressure water pump or the low-pressure water pump and then is converted into high-pressure water or low-pressure water, so that the permeable pavement is flushed.
With continuing reference to fig. 1, the present invention further provides a restoration method using the aforementioned photocatalytic permeable pavement activity restoration apparatus, the restoration method includes:
the method comprises the following steps: filling tap water in a water tank 11 of the operation vehicle, filling alkali liquor with a certain volume in an alkali liquor tank 31, and driving the operation vehicle to a road surface to be recovered;
step two: opening the high-pressure water pump 12 and the high-pressure water spray head 14 to wash the pavement so as to remove large-particle solid impurities in the pervious concrete of the pavement;
step three: after the second step is finished, closing the high-pressure water pump 12 and the high-pressure water spray head 14, and opening the alkali liquor spray head 32 to corrode and dissolve inorganic sediments on the surface of the permeable concrete of the pavement;
step four: after the third step is finished, closing the alkali liquor spray head 32, and opening the low-pressure water pump 13 and the low-pressure water spray head 15 to remove soluble impurities on the surface of the permeable concrete of the pavement;
step five: the power switch of the fan 41 and the electric heating wire 42 is turned on to generate high-temperature air to remove the adsorptive organic matters on the permeable concrete on the road surface. Clean high-temperature wind is blown to the road surface to remove adsorptive organic matters.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (6)
1. The photocatalytic permeable pavement activity recovery device is characterized by comprising an operation vehicle, wherein the operation vehicle comprises a vehicle body and guide wheels, a first mechanism, a second mechanism and a third mechanism are sequentially arranged on one side, close to the pavement, of the vehicle body along the same direction as the traveling direction of a vehicle head, the first mechanism comprises a water tank, a high-pressure water pump and a low-pressure water pump, the high-pressure water pump and the low-pressure water pump are respectively communicated with the water tank, and the high-pressure water pump and the low-pressure water pump are respectively connected with a high-pressure water spray head and a low-pressure water spray head which are arranged at the bottom end of the vehicle; the second mechanism comprises an alkaline liquid tank and an alkaline liquid pipe, the alkaline liquid tank is connected with an alkaline liquid spray head arranged at the bottom end of the vehicle body through the alkaline liquid pipe, and the alkaline liquid spray head is arranged between the high-pressure water spray head and the low-pressure water spray head; the third mechanism comprises a high-temperature drying device, the high-temperature drying device comprises a fan and an electric heating wire, and the fan is connected with an air outlet formed in the bottom end of the vehicle body through an air pipe.
2. The photocatalytic permeable pavement activity restoration device according to claim 1, wherein the operation vehicle is a two-axle engineering flat car.
3. The device for restoring the activity of the photocatalytic permeable pavement according to claim 1, wherein the alkaline solution tank contains alkaline solution of one of a sodium hydroxide aqueous solution and a potassium hydroxide aqueous solution with a concentration of 10-20%.
4. The photocatalytic permeable pavement activity restoration device according to claim 1, wherein the fan is an air blower.
5. The device for restoring the activity of a photocatalytic permeable pavement according to claim 1, wherein tap water is contained in the water tank.
6. A restoration method using the photocatalytic permeable pavement activity restoration apparatus according to any one of claims 1 to 5, comprising:
the method comprises the following steps: filling tap water in a water tank of the operation vehicle, filling a certain volume of alkali liquor in the alkali liquor tank, and driving the operation vehicle to the road surface to be recovered;
step two: opening a high-pressure water pump and a high-pressure water spray head to wash the pavement so as to remove large-particle solid impurities in the pervious concrete of the pavement;
step three: after the second step is finished, closing the high-pressure water pump and the high-pressure water spray head, and opening the alkali liquor spray head to corrode and dissolve inorganic sediments on the surface of the permeable concrete of the pavement;
step four: after the third step is finished, closing the alkali liquor spray head, and opening the low-pressure water pump and the low-pressure water spray head to remove soluble impurities on the surface of the permeable concrete of the pavement;
step five: and turning on a power supply of the fan and the electric heating wire to generate high-temperature air so as to remove adsorptive organic matters on the permeable concrete of the pavement.
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| CN201910723539.2A CN110468649B (en) | 2019-08-07 | 2019-08-07 | Photocatalytic permeable pavement activity recovery device and method |
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| CN110468649B true CN110468649B (en) | 2021-08-31 |
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| CN202530353U (en) * | 2012-04-27 | 2012-11-14 | 南京标美彩石建材有限公司 | Pervious concrete road surface structure with air purifying function |
| CN106894376A (en) * | 2015-12-21 | 2017-06-27 | 重庆乾富科技有限公司 | A kind of highway pavement maintenance clean car |
| CN107601979A (en) * | 2017-09-04 | 2018-01-19 | 南京林业大学 | Half-flexible pavement design of material method with degraded vehicle exhaust function |
| CN109183545A (en) * | 2018-09-28 | 2019-01-11 | 大连美宸特环保节能产品有限公司 | A kind of pavement construction method |
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2019
- 2019-08-07 CN CN201910723539.2A patent/CN110468649B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1134977A (en) * | 1996-01-18 | 1996-11-06 | 华南理工大学 | Method for prepn. of high efficiency detergent for cleaning runway in air-port, and method for cleaning |
| CN101457517A (en) * | 2008-04-28 | 2009-06-17 | 福建龙马专用车辆制造有限公司 | Pervious asphalt pavement cleaning and curing vehicle |
| CN202530353U (en) * | 2012-04-27 | 2012-11-14 | 南京标美彩石建材有限公司 | Pervious concrete road surface structure with air purifying function |
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