CN113943024A - Application of bamboo joint wall in efficient photothermal conversion water evaporation device and water evaporation device - Google Patents
Application of bamboo joint wall in efficient photothermal conversion water evaporation device and water evaporation device Download PDFInfo
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- 238000001704 evaporation Methods 0.000 title claims abstract description 81
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
- B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
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Abstract
The invention provides an application of bamboo joint walls in a photothermal conversion water evaporation device. The invention combines the mechanical stability of the bamboo joint wall and the water transport characteristic of the pore channel, utilizes the commonly discarded bamboo joint wall to apply the bamboo joint wall to the photo-thermal conversion water evaporation purification device, designs and prepares the biomass-based photo-thermal conversion water evaporation purification device, and shows excellent structural stability, water evaporation efficiency and efficiency stability. Based on the unique vascular bundle arrangement characteristics of natural bamboo joints, the invention fully utilizes the excellent mechanical stability and water transport characteristics, has the characteristics of multifunctional integration, obtains the photothermal conversion water purification device which is environment-friendly, sustainable and efficient, does not need complex experimental steps, does not need to remove lignin, has high efficiency and low energy consumption in the preparation process, and can solve the challenge of fresh water shortage in both the aspect of environmental influence and the aspect of efficiency.
Description
Technical Field
The invention belongs to the technical field of moso bamboo biomass recycling, and relates to application of a bamboo joint wall in a photothermal conversion water evaporation device, a water evaporation device, in particular to application of the bamboo joint wall in a high-efficiency photothermal conversion water evaporation device, and a water evaporation device.
Background
Moso bamboo is widely used in structural materials mainly due to the presence of a large proportion of bamboo partitions. The bamboo partition wall has excellent mechanical properties due to the highly unidirectionally oriented vascular bundles, and thus is widely applied. The bamboo wall is not regarded as important because of its non-unilaterally oriented bundles of blood vessels, and is even discarded. How to effectively utilize the discarded biomass slubs is very important.
The shortage of fresh water is a serious problem in the international world, and it is very important to use abundant solar energy to obtain clean fresh water. To achieve this goal, it is important to develop high performance photothermal conversion water evaporation devices. In recent years, a number of biomass-based photothermal conversion water evaporator devices have been developed. The wood block is used for preparing devices due to rich anisotropic guide pipes and sieve pipe pore canals, and good performance is realized; similarly, sugar cane is also used for the preparation of water evaporation devices due to its rich anisotropic pores; as another biomass material, loofah sponge is also used by researchers for the design and application of photothermal conversion water evaporator devices due to its rich isotropic multi-stage pore canals. The biomass water evaporation and purification devices have good efficiency, are environment-friendly and pollution-free, and have certain application advantages. However, these biomass materials have poor structural stability and risk of failure, such as highly anisotropic wood blocks and sugar cane during long-term water environmental service, where water flow will most likely flush the material along the long axis of the fiber bundles within the wood blocks or sugar cane; in the case of isotropic loofah, due to the lack of a unique mechanical reinforcing structure, it is difficult to predict and detect serious conditions such as sudden failure and the like which may occur. In summary, the structural stability of current biomass-based water evaporation purification devices remains a major problem affecting device applications. In addition to these biomass-based water evaporation purification devices, a number of synthetic materials have also been explored for the design of the assembly of water evaporation purification devices. For example, carbon nanotube fiber-gold nanoparticle-silica composite aerogel, graphene-carbon nanotube-sodium alginate composite aerogel and the like are also used for designing the photothermal conversion water evaporation device, and good efficiency is achieved. However, the chemical method for preparing new materials inevitably causes environmental pollution, which is not favorable for further popularization.
Therefore, how to construct a high-efficiency water evaporation and purification device based on a novel environment-friendly and highly stable-structure biomass material is urgent and necessary to effectively deal with the problem of fresh water shortage, has important significance, and is one of the focuses of great attention of a plurality of prospective researchers in the industry.
Disclosure of Invention
In view of this, the present invention provides an application of a bamboo joint wall in a photothermal conversion water evaporation device, and a water evaporation device. The invention properly treats the commonly discarded biomass bamboo joints, and the treated bamboo joints are used as a novel biomass-based photothermal conversion water evaporation purification device, show excellent structural stability, water evaporation efficiency and efficiency stability, and are very expected to play a role in the challenge of responding to the shortage of fresh water.
The invention provides an application of bamboo joint walls in a photothermal conversion water evaporation device.
Preferably, the bamboo joint wall comprises a bamboo joint wall of moso bamboo;
the photothermal conversion water evaporation device includes a photothermal conversion water evaporation device for water purification.
The invention provides a water evaporation device, which comprises a bamboo joint wall.
Preferably, the bamboo joint wall is a bamboo joint wall without outer bamboo skins;
the bamboo joint wall is the bamboo joint wall with bamboo yellow on the inner side removed;
the bamboo joint wall does not include a diaphragm in the bamboo joint.
Preferably, the bamboo joint comprises a part which is 0.5-2 cm upward of the rod ring;
the bamboo joint comprises a part with a downward 0.5-2 cm thickness of a bamboo sheath ring;
the water evaporation device comprises a photothermal conversion water evaporation device.
Preferably, the bamboo joint wall comprises a treated bamboo joint wall;
the treatment mode comprises the steps of removing a certain thickness of the outer side of the bamboo joint wall and/or removing a certain thickness of the inner side of the bamboo joint wall;
the certain thickness is 5-50% of the thickness of the bamboo joint wall before treatment.
Preferably, one side of the bamboo joint wall is set to be a black side;
the black side is the side of the water evaporation device facing the heat source;
the black side is provided with a light-absorbing heat-collecting layer;
the other side of the bamboo joint wall is the side of the water evaporation device facing the water source.
Preferably, one side of the bamboo joint wall comprises the inner side of the bamboo joint wall;
carbonizing one side of the bamboo joint wall to obtain a carbonized layer as a black side;
the thickness of the carbonized layer obtained after the carbonization treatment is 0.5-3 mm.
Preferably, the carbonization treatment mode comprises direct contact baking;
the temperature of the carbonization treatment is 200-400 ℃;
the carbonization treatment time is 2-30 minutes;
the bamboo joint wall is in one or more of a strip shape, a block shape, a spherical shape, a cake shape and an irregular shape.
The invention also provides application of the water evaporation device in any technical scheme in the field of water purification.
The invention provides an application of bamboo joint walls in a photothermal conversion water evaporation device. Compared with the prior art, the invention aims at the condition that the existing biomass moso bamboo joints are discarded, the problem that other existing biomass materials for water treatment have poor structural stability, and the problem that new materials synthesized by artificial chemistry inevitably cause environmental pollution. The research of the invention considers that, in order to change waste into valuables, the structure condition of the vascular bundle in the bamboo joint wall is firstly clearly known, and the bamboo joint wall is different from highly anisotropic biomass materials such as wood, sugarcane, bamboo partition wall tissues and the like, and the bamboo joint wall has the vascular bundle fibers which are transversely and interlockingly arranged with the bamboo joint wall besides the vascular bundle fibers which are axially distributed conventionally, so that the bamboo joint wall plays a role in strengthening, and the structural mechanical stability of the bamboo joint wall is effectively improved (as shown in figure 1). Meanwhile, fiber vascular bundles axially distributed in the bamboo joint wall and transversely distributed vascular bundles both contain extremely rich multi-scale and multi-directional pore passages (as shown in figure 2), and provide convenient conditions for transporting water and nutrients.
Referring to fig. 1, fig. 1 is an X-ray computed tomography image of the microstructure of the bamboo joint wall provided by the present invention. Wherein, the upper and lower arrows represent the trends of the fiber bundles arranged axially, and the trends of the fiber bundles arranged transversely are marked in the black triangular area. The vascular bundles arranged axially and the vascular bundles arranged transversely form a stable interlocking structure, and the structural stability is improved.
Based on the design, the novel biomass-based photothermal conversion water evaporation and purification device is designed and prepared by combining the mechanical stability of the bamboo joint wall and the water transport characteristic of the pore channel and applying the commonly discarded bamboo joint wall to the photothermal conversion water evaporation and purification device, and the novel biomass-based photothermal conversion water evaporation and purification device has excellent structural stability, water evaporation efficiency and efficiency stability, and is very expected to play a role in the challenge of coping with the shortage of fresh water. Based on the unique vascular bundle arrangement characteristics of natural bamboo joints, the invention fully utilizes the excellent mechanical stability and water transport characteristics (namely the characteristics of multifunctional integration), obtains the environment-friendly, sustainable and high-efficiency photothermal conversion water purification device, does not need complicated experimental steps, does not need to remove lignin, and has high efficiency and low energy consumption in the preparation process; the device will be able to cope with the challenge of freshwater deficit, both from an environmental impact point of view and from a performance point of view.
Experimental results show that the water evaporation efficiency of the bamboo joint wall photothermal conversion water evaporation and purification device prepared by the invention reaches 1.2 kilograms per square meter per hour, and the efficiency can be kept stable for 10 cycles or longer.
Drawings
FIG. 1 is an X-ray computed tomography image of a microstructure of a bamboo joint wall provided by the present invention;
FIG. 2 is a schematic view of a microstructure pore canal simulated and drawn by the bamboo joint wall photo-thermal conversion water evaporation device prepared by the invention;
FIG. 3 is a diagram of a bamboo joint wall photo-thermal conversion water evaporation purification device based on bamboo joints prepared by the present invention;
fig. 4 is a graph of water evaporation efficiency and cycle stability for devices prepared according to the present invention.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
All of the starting materials of the present invention, without particular limitation as to their source, may be purchased commercially or prepared according to conventional methods well known to those skilled in the art.
All the raw materials of the present invention are not particularly limited in their purity, and the present invention preferably employs the purity of analytical grade or the purity of conventional purity used in the field of the preparation of devices for use in photothermal conversion water evaporation.
The invention provides an application of bamboo joint walls in a photothermal conversion water evaporator.
In the present invention, the bamboo joint wall preferably comprises bamboo.
In the present invention, the photothermal conversion water evaporation device preferably includes a photothermal conversion water evaporation device for water purification.
The invention provides a water evaporation device, which comprises a bamboo joint wall.
In the present invention, the water evaporation device preferably comprises a photothermal conversion water evaporation device.
In the present invention, the bamboo joint wall is preferably a bamboo joint wall with outer bamboo skin removed. Specifically, the bamboo joint wall can be a bamboo joint wall with bamboo green removed.
In the present invention, the bamboo joint wall is preferably a bamboo joint wall with the inner side of tabasheer removed.
In the present invention, the bamboo joint wall preferably does not include the diaphragm within the bamboo joint. Namely, the bamboo joint wall provided by the invention also removes the diaphragm in the bamboo joint.
As is conventional in the art, bamboo joints are generally composed of three parts, rod collars, sheath collars and knots. Wherein, along the growth direction of the bamboo, the ring above the bamboo joint is a rod ring, the ring below the bamboo joint is a sheath ring, and the part positioned between the rod ring and the sheath ring is a joint.
In the invention, the bamboo joint preferably comprises a part of the rod ring which is 0.5-2 cm upward, more preferably 0.8-1.7 cm, and still more preferably 1.1-1.4 cm.
In the invention, the bamboo joint preferably comprises a part which is 0.5-2 cm below the hoop, more preferably 0.8-1.7 cm, and even more preferably 1.1-1.4 cm.
In the present invention, the bamboo wall preferably comprises a treated bamboo wall.
In the present invention, the treatment preferably comprises removing a certain thickness of the outer side of the bamboo joint wall and/or removing a certain thickness of the inner side, more preferably removing a certain thickness of the outer side of the bamboo joint wall or removing a certain thickness of the inner side.
In the present invention, the certain thickness is preferably 5% to 50%, more preferably 15% to 40%, and most preferably 25% to 30% of the thickness of the bamboo joint wall before the treatment. Specifically, the thickness of the bamboo joint wall before treatment is the original thickness of the bamboo joint wall.
In the invention, the bamboo joint wall is preferably a cut non-cylindrical bamboo joint wall, and specifically, the bamboo joint wall can be cut into more than 2 parts along the longitudinal direction of the bamboo joint wall. In the invention, the inner side and the outer side of the bamboo joint wall are preferably utilized simultaneously.
In the present invention, one side of the bamboo joint wall is preferably set to be a black side. Specifically, the carbonized layer is obtained as the black side after the carbonization treatment.
In the invention, the thickness of the carbonized layer obtained after the carbonization treatment is preferably 0.5-3 mm, more preferably 1-2.5 mm, and more preferably 1.5-2 mm.
In the present invention, the mode of the carbonization treatment preferably includes direct contact baking.
In the invention, the carbonization treatment temperature is preferably 200-400 ℃, more preferably 240-360 ℃, and more preferably 280-320 ℃.
In the present invention, the time for the carbonization treatment is preferably 2 to 30 minutes, more preferably 7 to 25 minutes, and still more preferably 12 to 20 minutes.
In the present invention, the black side is preferably a side of the water evaporation device facing the heat source. That is, in the present invention, the black side is preferably a light absorbing heat accumulating layer.
In the present invention, one side of the bamboo wall preferably comprises the inside of the bamboo wall.
In the present invention, the other side of the bamboo joint wall is preferably the side of the water evaporation device facing the water source.
In the present invention, the shape of the bamboo joint wall preferably includes one or more of a strip shape, a block shape, a spherical shape, a cake shape and an irregular shape, and more preferably a strip shape, a block shape, a spherical shape, a cake shape or an irregular shape.
The invention is a complete and detailed integral technical scheme, better improves the utilization rate of the bamboo joint wall, and improves the performance of the bamboo joint wall as a water evaporation device.
In order to facilitate detection and subsequent utilization, the preparation method of the device preferably comprises the following steps:
A) cutting off bamboo partitions at the upper part and the lower part of the bamboo joint, and only leaving the bamboo joint (with the height of 3cm, the wall thickness of 1cm and the diameter of 10cm) for later use;
B) punching through the bamboo joint inner diaphragm to leave a hollow bamboo joint wall;
C) dividing the hollow bamboo joint wall into 2 parts or 4 parts, and dividing each 1 part into 2 parts;
D) processing one of the bamboo joint walls by using a polishing and grinding device, grinding to remove the convex ridges on the outer sides of the bamboo joint walls, and flattening the two sides to form rectangular strips with the size of about 2.5cm (axial direction) -1cm (radial direction) -2cm (chord direction);
E) the inner side of the formed rectangular bar (namely the inner wall side of the bamboo joint wall) is directly contacted with a hot stage at 300 ℃ for 5 minutes to form a carbonized black layer (namely the light-absorbing and heat-collecting layer), thereby forming a basic photo-thermal conversion water evaporation and purification device.
Referring to fig. 2, fig. 2 is a schematic view of microstructure pore channels drawn by simulation of the bamboo joint wall photo-thermal conversion water evaporation device prepared by the invention.
As can be seen from figure 2, the bamboo joint wall has multi-directional and multi-scale pore canals such as ducts, screen pipes, veins and the like.
Referring to fig. 3, fig. 3 is a physical diagram of the device for photo-thermal conversion of water evaporation and purification based on bamboo joint wall prepared by the present invention.
The invention also provides a corresponding detection process:
placing the photo-thermal conversion water evaporation purification device in a vessel containing 200mL of water, enabling the carbonized black layer to face upwards, and covering the periphery of the device with commercial foam to ensure that the water surface is not exposed; placing the water container with the device on a balance;
the carbonized layer part of the device was irradiated with 1 light source of solar light intensity, and the change in mass decay (caused by the water vapor produced) was continuously recorded, and the evaporation efficiency was calculated.
The invention also provides application of the water evaporation device in any one of the technical schemes in the field of water purification.
The invention provides application of the bamboo joint wall in the aspect of high-efficiency photothermal conversion water evaporation devices and a water evaporation device. The invention combines the mechanical stability of the bamboo joint wall and the water transport characteristic of the pore channel, utilizes the commonly discarded bamboo joint wall to apply the bamboo joint wall to the photo-thermal conversion water evaporation purification device, designs and prepares a novel biomass-based photo-thermal conversion water evaporation purification device, shows excellent structural stability, water evaporation efficiency and efficiency stability, and is very expected to play a role in the challenge of coping with the shortage of fresh water. Based on the unique vascular bundle arrangement characteristics of natural bamboo joints, the invention fully utilizes the excellent mechanical stability and water transport characteristics, has the characteristics of multifunctional integration, obtains the photo-thermal conversion water purification device which is environment-friendly, sustainable and high-efficiency, does not need complex experimental steps, does not need to remove lignin, and has high efficiency and low energy consumption in the preparation process; the device will be able to cope with the challenge of freshwater deficit, both from an environmental impact point of view and from a performance point of view.
Experimental results show that the water evaporation efficiency of the bamboo joint wall photothermal conversion water evaporation and purification device prepared by the invention reaches 1.2 kilograms per square meter per hour, and the efficiency can be kept stable for 10 cycles or longer.
For further illustration of the present invention, the application of the bamboo joint wall in the photothermal conversion water evaporator and a water evaporator provided by the present invention are described in detail below with reference to the following examples, but it should be understood that these examples are implemented on the premise of the technical solution of the present invention, and the detailed implementation and specific operation procedures are given only for further illustration of the features and advantages of the present invention, and not for limitation of the claims of the present invention, and the protection scope of the present invention is not limited to the following examples.
Carrying out the process
Cutting off bamboo partitions at the upper part and the lower part of the bamboo joint, and only leaving the bamboo joint (with the height of 3cm, the wall thickness of 1cm and the diameter of 10cm) for later use;
B) punching through the bamboo joint inner diaphragm to leave a hollow bamboo joint wall;
C) dividing the hollow bamboo joint wall into 4 parts, and dividing each 1 part into 2 parts;
D) processing one of the bamboo joint walls by using a polishing and grinding device, grinding to remove the convex ridges on the outer sides of the bamboo joint walls, and flattening the two sides to form rectangular strips with the size of about 2.5cm (axial direction) -1cm (radial direction) -2cm (chord direction);
E) directly contacting the inner side (namely the inner wall side of the bamboo joint wall) of the formed rectangular bar with a hot table at 300 ℃ for 5 minutes to form a carbonized black layer (namely a light-absorbing and heat-collecting layer), thereby forming a basic photo-thermal conversion water evaporation and purification device;
F) placing the photo-thermal conversion water evaporation purification device in a vessel containing 200mL of water, enabling the carbonized black layer to face upwards, and covering the periphery of the device with commercial foam to ensure that the water surface is not exposed; placing the water container with the device on a balance;
G) the carbonized layer part of the device was irradiated with 1 light source of solar light intensity, and the change in mass decay (caused by the water vapor produced) was continuously recorded, and the evaporation efficiency was calculated.
Example 1
Trimming a bamboo joint wall into a rectangular strip with the size of about 2.5cm (axial direction) -1cm (radial direction) -2cm (chord direction), directly contacting the radially inner wall surface of the rectangular strip with a hot table at the temperature of nearly 300 ℃ for 5 minutes to form a carbonized light absorption layer, and naturally cooling to room temperature.
Pouring 200mL of water into a glass dish with the diameter of about 15cm, cutting a foam sheet with the area (water surface) equal to that of the glass dish, cutting a cavity with the size equivalent to that of a rectangular bar on the foam sheet, and carefully inserting the rectangular bar into the cavity of the foam in a placing mode that the radial outer wall surface is in contact with the water surface and the inner wall surface (carbonized light absorption layer) faces upwards to ensure that the water surface is not exposed; the whole system (glass dish and prepared device) was placed on a precision balance; then, regulating and controlling the distance between the intensity of the light source and the sample, ensuring that the light intensity of the carbonized light absorption layer on the surface of the sample reaches 1 sunlight, and monitoring the weight change in real time; in the cycle stability experiment, the light intensity meter is adopted to operate for 20 minutes and stop for 10 minutes (recorded as a cycle), 10 cycles are carried out in total, and the water evaporation purification rate is calculated according to the change of the system weight and the area of the carbonized light absorption layer in the cycle period and is about 1.2Kg/m2And h, the evaporation rate of the prepared device is relatively stable as shown by a cycle test.
Referring to fig. 4, fig. 4 is a graph of water evaporation efficiency and cycle stability for devices prepared according to the present invention.
The foregoing detailed description of the application of the bamboo joint wall in the high efficiency photothermal conversion water evaporation device, and a water evaporation device, and the specific examples used herein to illustrate the principles and embodiments of the present invention, are provided only to help understand the method and its core ideas, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any combination of the methods. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. The scope of the invention is defined by the claims and may include other embodiments that occur to those skilled in the art. Such other embodiments are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
Claims (10)
1. The bamboo joint wall is applied to the aspect of a photo-thermal conversion water evaporator.
2. Use according to claim 1, characterized in that the bamboo walls comprise bamboo walls of moso bamboo;
the photothermal conversion water evaporation device includes a photothermal conversion water evaporation device for water purification.
3. A water evaporation device is characterized by comprising bamboo joint walls.
4. The water evaporator device as recited in claim 3, wherein the bamboo joint wall is a bamboo joint wall with outer bamboo skin removed;
the bamboo joint wall is the bamboo joint wall with bamboo yellow on the inner side removed;
the bamboo joint wall does not include a diaphragm in the bamboo joint.
5. The water evaporator device according to claim 3, wherein the bamboo joint comprises a part of 0.5-2 cm upward of the rod ring;
the bamboo joint comprises a part with a downward 0.5-2 cm thickness of a bamboo sheath ring;
the water evaporation device comprises a photothermal conversion water evaporation device.
6. The water evaporator device of claim 3, wherein the bamboo joint wall comprises a treated bamboo joint wall;
the treatment mode comprises the steps of removing a certain thickness of the outer side of the bamboo joint wall and/or removing a certain thickness of the inner side of the bamboo joint wall;
the certain thickness is 5-50% of the thickness of the bamboo joint wall before treatment.
7. The water evaporator device according to claim 3, wherein one side of the bamboo joint wall is set to be a black side;
the black side is the side of the water evaporation device facing the heat source;
the black side is provided with a light-absorbing heat-collecting layer;
the other side of the bamboo joint wall is the side of the water evaporation device facing the water source.
8. The water evaporator device of claim 7, wherein one side of the bamboo wall comprises an inner side of the bamboo wall;
carbonizing one side of the bamboo joint wall to obtain a carbonized layer as a black side;
the thickness of the carbonized layer obtained after the carbonization treatment is 0.5-3 mm.
9. The water evaporator device as recited in claim 8, wherein the carbonization process comprises direct contact baking;
the temperature of the carbonization treatment is 200-400 ℃;
the carbonization treatment time is 2-30 minutes;
the bamboo joint wall is in one or more of a strip shape, a block shape, a spherical shape, a cake shape and an irregular shape.
10. Use of a water evaporation device as claimed in any one of claims 3 to 9 in the field of water purification.
Priority Applications (1)
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| CN115745055A (en) * | 2022-08-23 | 2023-03-07 | 安徽农业大学 | Preparation method of modified luffa stem steam generating body and modified luffa stem-based seawater desalination evaporator |
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| WO2021108576A1 (en) * | 2019-11-26 | 2021-06-03 | University Of Maryland, College Park | Bamboo structures, and methods for fabrication and use thereof |
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