CN220537710U - Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide - Google Patents

Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide Download PDF

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Publication number
CN220537710U
CN220537710U CN202322075028.9U CN202322075028U CN220537710U CN 220537710 U CN220537710 U CN 220537710U CN 202322075028 U CN202322075028 U CN 202322075028U CN 220537710 U CN220537710 U CN 220537710U
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China
Prior art keywords
coarse aggregate
titanium dioxide
recycled coarse
nano titanium
soaking
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CN202322075028.9U
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Chinese (zh)
Inventor
王英辉
杨海峰
王文欢
胡雪玲
吴慧玲
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Guangxi Institute Of Green And Low Carbon Technology Co ltd
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Guangxi Institute Of Green And Low Carbon Technology Co ltd
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Abstract

The utility model discloses a mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide, and belongs to the technical field of building materials. Comprises a spraying part, a soaking tank, a wind-transmitting drier part and a stirring mixer; the spraying part is internally provided with a first conveyor, the soaking tank is arranged at one side of the spraying part, the nano titanium dioxide solution is poured into the soaking tank, and the input end of the first conveyor is communicated with the input end of the soaking tank; the soaking pond is kept away from one side of spraying portion and is equipped with the transmission and send the air dryer portion, the stirring mixer sets up and is kept away from one side of soaking pond in the transmission and air dryer portion, just the stirring mixer is linked together with the output of transmission and send the air dryer portion. The utility model repairs microcracks and nano-micron pores in the recycled coarse aggregate through nano titanium dioxide, improves the interface performance of the recycled coarse aggregate, improves the compactness of the recycled coarse aggregate, and realizes the mixing of the recycled coarse aggregate and nano titanium dioxide and other materials in a pipeline way.

Description

Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide
Technical Field
The utility model relates to the technical field of building materials, in particular to a mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide.
Background
With the development of urban process in China, the discharge amount of construction waste is increased year by year. However, most of the construction waste is transported to suburbs or the periphery of cities for simple landfill or open-air stockpiling without any treatment, which not only wastes land and resources, but also pollutes the environment, thereby causing ecological damage. Therefore, the production and the utilization of the construction waste recycled coarse aggregate have important significance for saving resources, protecting the environment and realizing the sustainable development of the construction industry. At present, recycled coarse aggregate is mainly recycled by stirring and mixing the recycled coarse aggregate with other materials such as cement, fly ash, natural sand, water reducer and the like, so that recycled concrete is obtained. However, the recycled coarse aggregate has more microcracks and nano-scale and micro-scale pores, the powder materials such as cement, fly ash and the like can only fill larger crack gaps, the microcracks and the nano-scale pores are difficult to fill, and the recycled coarse aggregate which is not perfectly treated is used for preparing recycled concrete, so that the recycled concrete is easy to crack along the microcracks and the nano-scale and micro-scale pores of the recycled coarse aggregate in the subsequent use process. Research shows that titanium dioxide has good repairing effect on microcracks and nano-scale and micro-scale pores in the recycled coarse aggregate, and based on the good repairing effect, the inventor proposes a technical scheme of a mixing device for modifying the recycled coarse aggregate by using nano titanium dioxide.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the mixing device for modifying the recycled coarse aggregate by using the nano titanium dioxide, and the micro-cracks and the nano micron-sized pores in the recycled coarse aggregate are repaired by using the nano titanium dioxide, so that the recycled coarse aggregate, the nano titanium dioxide and other materials are mixed in a pipeline manner, the interface performance of the recycled coarse aggregate is improved, and the compactness of the recycled coarse aggregate is improved.
The utility model relates to a mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide, which comprises a spraying part, a soaking tank, a wind-conveying and drying part and a stirring mixer; the spraying part is internally provided with a first conveyor for conveying the recycled coarse aggregate, the soaking tank is arranged on one side of the spraying part, the nano titanium dioxide solution is poured into the soaking tank, and the input end of the first conveyor is communicated with the input end of the soaking tank; the soaking pond is kept away from the conveying air-dried portion of the regeneration coarse aggregate after soaking that is used for conveying and air-dries in one side of spraying portion, the stirring mixer sets up in conveying air-dried portion one side of keeping away from the soaking pond, just the stirring mixer is linked together with the output of conveying air-dried portion.
Further, the spraying part comprises a spraying box and a liquid storage box; the two opposite ends of the spray box are open, the conveyor penetrates through the spray box, and a spray header is arranged at the top of the spray box; the liquid storage tank is arranged below the spray tank, nano titanium dioxide solution is stored in the liquid storage tank, a submersible pump is arranged in the liquid storage tank, and the submersible pump is connected with the spray header through a pipeline.
Further, the liquid storage tank is communicated with the spraying tank, and an isolation screen plate is arranged at the communication position of the liquid storage tank and the spraying tank.
Further, a first baffle is fixedly arranged on the inner wall of the liquid storage tank, a second baffle is fixedly arranged at the bottom of the liquid storage tank, the second baffle is fixedly connected with the first baffle, and a clear liquid cavity is formed by the first baffle and the second baffle; and a through hole is formed in one end, far away from the bottom of the liquid storage tank, of the second baffle, and a fine filter screen is arranged in the through hole.
Further, the baffle plates are arranged in an inclined way.
Further, a coarse filter screen is arranged on one side of the second baffle, and a filter cavity is formed by enclosing the coarse filter screen, the first baffle and the second baffle.
Further, a separation plate for separating the soaking tank into two soaking cavities is arranged in the soaking tank, a striker plate is hinged to the separation plate, and limiting blocks for limiting the rotation angle of the striker plate are arranged on the soaking tanks on two sides of the separation plate.
Further, mechanical arms are arranged on two sides of the soaking tank, a bucket is arranged at the tail end of the mechanical arm, and a plurality of water filtering holes are formed in the bucket.
Further, the conveying air drying part comprises a second conveyor, an air feeder and an air outlet cover; one end of the second conveyor is positioned at one side of the soaking tank, and the output end of the second conveyor is positioned at the upper end of the feed inlet of the stirring mixer; the air outlet cover is arranged above the second conveyor through a bracket, and the air feeder is arranged above the air outlet cover.
Further, an inclined conveying section is arranged in the second conveyor, a plurality of rotating rollers are sequentially arranged in the inclined conveying section, and the diameters of the rotating rollers are larger than those of the driving roller and the driven roller in the second conveyor.
Advantageous effects
The utility model has the advantages that:
1. according to the utility model, the recycled coarse aggregate is conveyed to the soaking tank, so that the recycled coarse aggregate is soaked in the nano titanium dioxide solution, microcracks and nano micron-sized pores in the recycled coarse aggregate are repaired by the nano titanium dioxide, the interface performance of the recycled coarse aggregate is improved, the compactness of the recycled coarse aggregate is improved, the compressive strength of recycled concrete is further improved, and the recycled concrete meets the construction requirements, thereby solving the recycling problem of waste bricks and waste concrete in construction waste, and achieving the purposes of improving the recycling rate of resources, saving resources and protecting the environment.
2. The spraying part is arranged at the side of the soaking tank to clean the recycled coarse aggregate, so that dust and gravel adhered to the recycled coarse aggregate can be effectively reduced, and sundries such as dust and gravel are prevented from being easily deposited in the soaking tank. In addition, the nano titanium dioxide solution is stored in the liquid storage tank of the spraying part, namely, the recycled coarse aggregate is cleaned by adopting the nano titanium dioxide solution with the same concentration as that in the soaking tank, so that the problem that the concentration of the nano titanium dioxide solution in the recycled coarse aggregate soaked by spraying is reduced when the recycled coarse aggregate enters the soaking tank can be effectively avoided.
3. The air feeder and the air outlet cover are arranged above the conveyor II, and the inclined conveying section is arranged in the conveyor II, so that the recycled coarse aggregate can be overturned while the soaked recycled coarse aggregate is air-dried, and the recycled coarse aggregate can be dried better and faster.
Drawings
Fig. 1 is a schematic perspective view of a mixing device according to the present utility model.
Fig. 2 is a schematic view of the internal structure of the spray tank and the liquid storage tank of the present utility model.
Wherein: 1-conveyer I, 2-spray box, 3-liquid storage box, 4-spray head, 5-soaking tank, 6-soaking cavity, 7-stopper, 8-striker plate, 9-conveyer II, 10-inclined conveying section, 11-roller, 12-forced draught blower, 13-fan housing, 14-stirring mixer, 15-isolation screen plate, 16-baffle I, 17-baffle II, 18-fine filter screen, 19-clear liquid cavity, 20-immersible pump, 21-coarse filter screen, 22-filter cavity.
Detailed Description
The utility model is further described below in connection with the examples, which are not to be construed as limiting the utility model in any way, but rather as falling within the scope of the claims.
Referring to fig. 1-2, the mixing device for modifying recycled coarse aggregate by using nano titanium dioxide according to the utility model comprises a spraying part, a soaking tank 5, a transmission air drying part and a stirring mixer 14.
Wherein, the spraying part is provided with a conveyor I1 for conveying the recycled coarse aggregate. The recycled coarse aggregate was obtained by crushing and sieving waste concrete. The spraying part is used for spraying cleaning liquid to clean the recycled coarse aggregate, and dust and gravel adhered to the recycled coarse aggregate are reduced. The conveyor belt of the conveyor 1 employs a mesh belt to prevent the cleaning liquid from accumulating on the conveyor belt.
The spray part of the present embodiment includes a spray tank 2 and a liquid storage tank 3. The two opposite ends of the spray box 2 are open, the first conveyor 1 penetrates through the spray box 2, and a spray header 4 is arranged at the top of the spray box 2. The liquid storage tank 3 is arranged below the spray tank 2, and cleaning liquid is stored in the liquid storage tank 3. The cleaning solution can be water or other solutions, and the nano titanium dioxide solution with the same concentration as that in the soaking tank is adopted in the embodiment, so that the problem that the sprayed and soaked regenerated coarse aggregate enters the soaking tank 5 to reduce the concentration of the nano titanium dioxide solution is avoided. A submersible pump 20 is arranged in the liquid storage tank 3, and the submersible pump 20 is connected with the spray header 4 through a pipeline.
When the submersible pump 20 is started, the nano titanium dioxide solution in the liquid storage tank 3 can be conveyed into the spray header 4 through a pipeline and sprayed on the regenerated coarse aggregate on the conveyor I1 through the spray header 4, so that the regenerated coarse aggregate is cleaned.
In order to realize the recovery of the nano titanium dioxide solution in the spray tank 2, the liquid storage tank 3 of the embodiment is communicated with the spray tank 2, and an isolation screen 15 is arranged at the communication part of the liquid storage tank 3 and the spray tank 2 so as to prevent the regenerated coarse aggregate falling from the first conveyor 1 from falling into the liquid storage tank 3.
Because the nano titanium dioxide solution cleaned by the regenerated coarse aggregate contains solid particles such as sand, in order to prevent the solid particles from entering the submersible pump 20 to damage the submersible pump, a first baffle 16 is fixedly arranged on the inner wall of the liquid storage tank 3, a second baffle 17 is fixedly arranged at the bottom of the liquid storage tank 3, the second baffle 17 is fixedly connected with the first baffle 16, and a clear liquid cavity 19 is formed by the first baffle 16 and the second baffle 17; the end of the second baffle 17 far away from the bottom of the liquid storage tank 3 is provided with a through hole, and a fine filter screen 18 is arranged in the through hole, so that the filtering and blocking of sand are realized.
Preferably, the first baffle plate 16 is obliquely arranged, so that the problem of solid particles accumulated above the first baffle plate 16 can be effectively prevented, and meanwhile, the nano titanium dioxide solution is also facilitated to flow into the liquid storage tank 3.
In addition, a coarse screen 21 is provided on one side of the second baffle 17, and the mesh of the coarse screen 21 is larger than that of the fine screen. The coarse screen 21, the first baffle 16 and the second baffle 17 enclose a filter cavity 22. According to the utility model, through the arrangement of the two layers of filter screens, solid particles in the nano titanium dioxide solution in the liquid storage tank 3 can be more effectively filtered, and the impurity content of the nano titanium dioxide solution in the clear liquid cavity 19 is reduced.
The cleaned regenerated coarse aggregate is conveyed by a conveyor 1 to a soaking tank 5 filled with nano titanium dioxide solution. According to the utility model, the recycled coarse aggregate is soaked in the nano titanium dioxide solution, and the micro cracks and nano micron pores in the recycled coarse aggregate are repaired by the nano titanium dioxide, so that the interface performance of the recycled coarse aggregate is improved, the compactness of the recycled coarse aggregate is improved, the compressive strength of the recycled concrete is further improved, and the recycled concrete meets the construction requirements, thereby solving the recycling problem of waste bricks and waste concrete in construction waste, and achieving the purposes of improving the recycling rate of resources, saving resources and protecting the environment.
Considering that soaking takes a certain time, the soaking tank 5 of the present embodiment is provided therein with a partition plate that divides it into two soaking chambers 6, the partition plate being located at a center line position in the conveying direction of the conveyor 1. The baffle plate 8 is hinged on the partition plate, and limiting blocks 7 for limiting the rotation angle of the baffle plate 8 are arranged on the soaking tanks 5 on two sides of the partition plate. The dam 8 plays a role of blocking and guiding the recycled coarse aggregate.
Specifically, the striker plate 8 is inclined after being limited by the limiting block 7. Since the divider plate is in the first conveyor 1 neutral position, the recycled coarse aggregate will drop into each of the two soaking chambers 6 without the dam plate 8. But when the stopper 7 is installed and turned to one side, the recycled coarse aggregate is prevented from falling into the soak chamber 6 of the one side by the blocking of the dam plate 8. And the recycled coarse aggregate falling on the baffle plate 8 rolls down along the baffle plate 8 to the soaking cavities 6 on the other side, thereby realizing the transfer of the recycled coarse aggregate transferred from the first conveyor 1 to one of the soaking cavities 6. When the dipping chamber 6 is filled to a predetermined amount, the reclaimed coarse aggregate is transferred to another dipping chamber 6 by turning the dam 8.
In order to take out the recycled coarse aggregate in the soaking cavity 6, mechanical arms are arranged at two sides of the soaking pool 5 in the embodiment, a bucket is arranged at the tail end of the mechanical arm, and a plurality of water filtering holes are formed in the bucket, so that after the recycled coarse aggregate is dug up, the nano titanium dioxide solution falls back into the soaking cavity 6 through the water filtering holes, and material-water separation is realized.
The recycled coarse aggregate taken out of the dipping tank 5 will be required to be air-dried, and this embodiment will be realized by conveying an air-drying section. Specifically, the conveying air-drying section includes a conveyor two 9, an air blower 12, and an air outlet cover 13. One end of the second conveyor 9 is located at one side of the steeping vat 5. The removed recycled coarse aggregate is placed on the second conveyor 9 and then conveyed. The air outlet cover 13 is arranged above the second conveyor 9 through a bracket, and the blower 12 is arranged above the air outlet cover 13. The air sent by the blower 12 is blown to the regenerated coarse aggregate on the second conveyor 9 through the air outlet cover 13, so that the air drying is realized while conveying. The conveyer belt of the second conveyer 9 adopts a mesh belt, which is favorable for better air drying the recycled coarse aggregate.
Preferably, a tilting conveyor section 10 is provided in the second conveyor 9, and the tilting conveyor section 10 is located below the air outlet hood 13. Three rotating rollers 11 are sequentially arranged in the inclined conveying section 10, and the diameters of the three rotating rollers 11 are larger than the diameters of a driving roller and a driven roller in the second conveyor 9. I.e. at the location of the turning rolls 11, the conveyor belt protrudes from the conveying surface. When the recycled coarse aggregate is conveyed to the position, the recycled coarse aggregate can roll due to the uneven conveying surface, so that better air drying is realized. In addition, the inclined conveying section 10 which is arranged obliquely can prevent the phenomenon of accumulation by utilizing the gravity of the recycled coarse aggregate.
The output end of the second conveyor 9 is positioned at the upper end of the feed inlet of the stirring mixer 14 so as to convey the air-dried regenerated coarse aggregate into the stirring mixer 14. The recycled coarse aggregate can be mixed with other materials such as cement, fly ash, natural sand, water reducer and the like by the stirring action of the stirring mixer 14. It should be noted that the mixer 14 belongs to a product currently existing in the market, and the present utility model does not improve the present utility model.
The working principle of the utility model is as follows: the power equipment in the mixing device is started, and the regenerated coarse aggregate is placed on a first conveyor 1 for conveying. When the recycled coarse aggregate enters the spray box 2, the nano titanium dioxide solution sprayed from the spray header 4 cleans the recycled coarse aggregate, and the nano titanium dioxide solution cleaned by the recycled coarse aggregate falls back into the liquid storage box 3 for circulation. The cleaned recycled coarse aggregate will be transferred to the upper side of the steeping cistern 5. When the recycled coarse aggregate falls, the recycled coarse aggregate falls into one of the soaking tanks 5 for soaking of the nano titanium dioxide solution due to the blocking effect of the baffle plate 8. When the dipping chamber 6 is filled to a predetermined amount, the reclaimed coarse aggregate is transferred to another dipping chamber 6 by turning the dam 8. The soaked recycled coarse aggregate is driven by a mechanical arm to excavate the bucket and is placed on a second conveyor 9. When the recycled coarse aggregate is conveyed to the lower part of the air outlet cover 13, the air of the recycled coarse aggregate is dried by the air sent by the air blower 12 and the rolling of the recycled coarse aggregate by the rotary roller 11. The air-dried recycled coarse aggregate will be transferred to the agitator mixer 14. The recycled coarse aggregate can be mixed with other materials such as cement, fly ash, natural sand, water reducer and the like by the stirring action of the stirring mixer 14. The method realizes the mixing of the recycled coarse aggregate, the nano titanium dioxide and other materials in a pipeline way, and the recycled concrete with better compressive strength is obtained.
While only the preferred embodiments of the present utility model have been described above, it should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these do not affect the effect of the implementation of the present utility model and the utility of the patent.

Claims (10)

1. The mixing device for modifying the recycled coarse aggregate by utilizing the nano titanium dioxide is characterized by comprising a spraying part, a soaking tank (5), a conveying air-drying part and a stirring mixer (14); the spraying part is internally provided with a first conveyor (1) for conveying the recycled coarse aggregate, the soaking tank (5) is arranged on one side of the spraying part, the soaking tank (5) is filled with nano titanium dioxide solution, and the input end of the first conveyor (1) is communicated with the input end of the soaking tank (5); the soaking pond (5) keep away from the transport air-drying portion of the regeneration coarse aggregate after the spraying portion is equipped with and is used for conveying and air-dries the soaking, stirring mixer (14) set up in the transport air-drying portion keep away from the one side of soaking pond (5), just stirring mixer (14) are linked together with the output of conveying air-drying portion.
2. The mixing device for modifying recycled coarse aggregate by using nano titanium dioxide according to claim 1, wherein the spraying part comprises a spraying box (2) and a liquid storage box (3); the two opposite ends of the spray box (2) are open, the first conveyor (1) penetrates through the spray box (2), and a spray header (4) is arranged at the top of the spray box (2); the liquid storage tank (3) is arranged below the spray tank (2), nano titanium dioxide solution is stored in the liquid storage tank (3), a submersible pump (20) is arranged in the liquid storage tank (3), and the submersible pump (20) is connected with the spray header (4) through a pipeline.
3. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 2, wherein the liquid storage tank (3) is communicated with the spraying tank (2), and an isolation screen (15) is arranged at the communication part of the liquid storage tank (3) and the spraying tank (2).
4. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 3, wherein a first baffle (16) is fixedly arranged on the inner wall of the liquid storage tank (3), a second baffle (17) is fixedly arranged at the bottom of the liquid storage tank (3), the second baffle (17) is fixedly connected with the first baffle (16), and a clear liquid cavity (19) is formed by the first baffle (16) and the second baffle (17) in a surrounding manner; and a through hole is formed in one end, far away from the bottom of the liquid storage tank (3), of the second baffle (17), and a fine filter screen (18) is arranged in the through hole.
5. A mixing device for modifying recycled coarse aggregate with nano titania according to claim 4, wherein the first baffle (16) is disposed obliquely.
6. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 4, wherein a coarse filter screen (21) is arranged on one side of the second baffle plate (17), and a filter cavity (22) is formed between the coarse filter screen (21) and the first baffle plate (16) and between the coarse filter screen and the second baffle plate (17).
7. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 1, wherein a separation plate for separating the recycled coarse aggregate into two soaking cavities (6) is arranged in the soaking tank (5), a striker plate (8) is hinged on the separation plate, and limiting blocks (7) for limiting the rotation angle of the striker plate (8) are arranged on the soaking tanks (5) on two sides of the separation plate.
8. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 7, wherein mechanical arms are arranged on two sides of the soaking tank (5), a bucket is arranged at the tail end of each mechanical arm, and a plurality of water filtering holes are formed in each bucket.
9. The mixing device for modifying recycled coarse aggregate by using nano titanium dioxide according to claim 1, wherein the conveying air-drying part comprises a conveyor II (9), a blower (12) and an air outlet cover (13); one end of the second conveyor (9) is positioned at one side of the soaking tank (5), and the output end of the second conveyor (9) is positioned at the upper end of a feed inlet of the stirring mixer (14); the air outlet cover (13) is arranged above the second conveyor (9) through a bracket, and the air feeder (12) is arranged above the air outlet cover (13).
10. The mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide according to claim 9, wherein an inclined conveying section (10) is arranged in the second conveyor (9), a plurality of rotating rollers (11) are sequentially arranged in the inclined conveying section (10), and the diameters of the rotating rollers (11) are larger than those of a driving roller and a driven roller in the second conveyor (9).
CN202322075028.9U 2023-08-03 2023-08-03 Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide Active CN220537710U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322075028.9U CN220537710U (en) 2023-08-03 2023-08-03 Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322075028.9U CN220537710U (en) 2023-08-03 2023-08-03 Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide

Publications (1)

Publication Number Publication Date
CN220537710U true CN220537710U (en) 2024-02-27

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ID=89963243

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322075028.9U Active CN220537710U (en) 2023-08-03 2023-08-03 Mixing device for modifying recycled coarse aggregate by utilizing nano titanium dioxide

Country Status (1)

Country Link
CN (1) CN220537710U (en)

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