Contact separation type friction catalysis device

Abstract

The invention discloses a contact separation type friction catalytic device, which relates to the technical field of catalytic devices, and comprises a porous spherical shell, a hollow square body is arranged in the porous spherical shell, the contact separation type friction catalytic device also comprises semicircular friction plates, and the semicircular friction plates are uniformly arranged on the hollow square body. Different from the prior art, the scheme is based on a unique electrification principle, the contact and separation electrification efficiency is mainly influenced by the contact area and the characteristics of materials, namely, the larger the contact area is, the higher the electrification efficiency is, based on the characteristic, the size design of the device has higher flexibility, the device can be directly manufactured into a larger size, and the device is convenient to use. The friction device does not need to be made into small particles through a complex process in the prior art, the working time of the device is not limited, and the friction device can continuously and stably work as long as the internal structure of the device is kept intact; due to the characteristic, the device has remarkable advantages in an application scene needing long-time continuous operation.

Description

Technical Field

[0001] The present invention relates to the technical field of catalytic devices, and particularly to a contact separation type friction catalytic device. Background Art

[0002] Water pollution has become a global environmental problem. Among them, organic pollution is one of the main forms of water pollution, and the effective degradation of organic pollution has become the key to solving the water pollution problem. At present, the organic degradation technologies mainly include three categories: oxidation decomposition method, electrochemical decomposition method, and catalytic decomposition method. The catalytic decomposition method is further divided into photocatalysis, piezoelectric catalysis, and friction catalysis. Among them, friction catalysis has the advantages of rapid reaction, wide energy source, and easy availability of friction materials, and has become a potential new degradation technology. However, there are still problems such as fewer excitation methods and unclear catalytic mechanisms in friction catalysis. In view of these problems, the present invention first proposes a contact separation type friction catalytic method and develops a contact separation type friction catalytic device.

[0003] In the current research on triboelectrification catalysis, it can be divided into two categories: magnetic stirring type and ultrasonic-induced contact electrification according to different friction catalytic excitation methods. However, the current research on triboelectrification catalysis still has the following disadvantages:

[0004] 1. Although the nanoparticle or powder catalytic materials widely used in current research have high catalytic activity, their small size makes solid-liquid separation difficult, it is difficult to achieve efficient recovery, and they are easily left in the reaction system and cause secondary environmental pollution.

[0005] 2. In the laboratory environment, high-energy-consuming equipment such as high-frequency electromagnetic stirring or ultrasonic waves is often relied on to strengthen the electron transfer in the triboelectrification effect and improve the catalytic efficiency. The high cost and high energy consumption characteristics of such equipment limit their feasibility in large-scale practical applications.

[0006] Therefore, a contact separation type friction catalytic device is proposed to solve the above problems. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to propose a contact separation type friction catalytic device to solve the problems in the background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A contact separation type friction catalytic device includes a porous spherical shell, a hollow square body is installed in the porous spherical shell, and the contact separation type friction catalytic device further includes semi-circular friction plates, and the semi-circular friction plates are evenly arranged on the hollow square body.

[0009] Preferably, the porous spherical shell is made of ordinary plastic, and the appearance is transparent for easy observation. The porous spherical shell is composed of two semi-spherical shells.

[0010] Preferably, water injection holes are evenly formed in the porous spherical shell, and the water injection holes are used for evenly injecting water bodies containing organic pollutants (such as seawater) into the interior of the porous spherical shell.

[0011] Preferably, double-headed bolts are evenly installed in the hollow square body by means of threads, the semi-circular friction plates are installed on the non-threaded outer surfaces of the double-headed bolts, and a rotating ring is arranged on one side of the semi-circular friction plate away from the hollow square body.

[0012] Preferably, the rotating ring is sleeved on the outer surface of the double-headed bolt, a nut is arranged on one side of the rotating ring away from the semi-circular friction plate, and the nut is installed on the double-headed bolt by means of threads.

[0013] Preferably, the semi-circular friction plate is made of polytetrafluoroethylene material, the diagonal dimension of the hollow square body is adapted to the inner surface diameter of the porous spherical shell, and the four corners of the hollow square body are clamped on the inner surface of the porous spherical shell.

[0014] Compared with the prior art, a contact separation type friction catalytic device provided by the present invention has the following

[0015] Advantages:

[0016] 1. The present invention is a self-driven device. The present invention combines friction catalysis with the principle of contact separation type triboelectrification for the first time. By using water wave energy and its own gravity, the friction pair can be continuously contacted and separated, generating triboelectrification, and thus generating a friction catalytic effect to degrade organic matter in seawater.

[0017] 2. The friction pair material design of the present invention is simple. The prior art uses high-frequency energy to make materials collide with each other to generate triboelectrification. To improve the electrification efficiency, the materials must be processed into small particles to improve the collision efficiency. This process is cumbersome and the small particles are not easy to recover. The friction pair materials of the present invention are simple and easy to obtain. Due to different principles, the factors affecting the contact separation electrification efficiency are the contact area and the material's own properties. The larger the contact area, the higher the electrification efficiency. Therefore, the size of the friction pair of this device can be made larger without the additional process of making small particles in the prior art. At the same time, the working time of this device is not limited. As long as the internal device is not damaged, the friction device will not fail.

[0018] 3. The present invention can continuously and automatically carry out friction catalysis to degrade organic matter in seawater. The design of the externally perforated spherical shell of the present invention can enable continuous seawater exchange inside and outside the device, eliminating the need for manual water changing and draining operations, and can achieve true automatic degradation of organic matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 Schematic diagram of the internal structure of the semi-sectioned porous spherical shell of the present invention;

[0021] Figure 3 Schematic diagram of the connection relationship of the hollow cube structure of the present invention;

[0022] Figure 4 Schematic diagram of the disassembled state of the connection of the hollow cube structure of the present invention;

[0023] Figure 5 Schematic diagram of the linear fitting of the concentration and absorbance of methyl orange solution;

[0024] Figure 6 Schematic diagram of the degradation amount of methyl orange solution concentration;

[0025] Figure 7 Schematic diagram of the degradation rate of methyl orange solution.

[0026] In the figure:

[0027] 1. Porous spherical shell; 11. Hollow cube; 21. Water injection hole; 31. Double-headed bolt; 32. Semi-circular friction plate; 33. Rotating ring; 34. Nut. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Next, the present invention will be further described in detail according to the drawings and embodiments.

[0030] Example 1, please refer to Figures 1 to 7 as shown:

[0031] To solve the problems mentioned in the technical solution, the embodiment of the present application provides a contact separation type friction catalytic device, including a porous spherical shell 1, a hollow cube 11 is installed in the porous spherical shell 1, and a contact separation type friction catalytic device further includes a semi-circular friction plate 32, and the semi-circular friction plates 32 are uniformly arranged on the hollow cube 11.

[0032] The material of the porous spherical shell 1 is ordinary plastic, with low density, easy to float and transparent appearance for convenient observation. The porous spherical shell 1 is composed of two semi-spherical shells.

[0033] Water injection holes 21 are uniformly opened on the porous spherical shell 1, and the water injection holes 21 are used for uniformly injecting seawater into the interior of the porous spherical shell 1.

[0034] Among them, the porous spherical shell 1 is set as a spherical outer shell, which is easier to be pushed by water waves than a cube device. The internal friction device generates more contact and separation times within the same time, has a greater charge generation amount, and a higher catalytic efficiency. The present invention first sets up a contact-separation friction catalytic device. Through the internal design of the device, under the push of water waves, the internal friction pairs will generate contact-separation triboelectrification under the drive of gravity. The device has a simple structure, does not require any high-frequency energy drive, and at the same time, the friction pair structure is complete, easy to recycle, and will not cause new pollution.

[0035] Specifically, double-headed bolts 31 are evenly threadedly installed on the hollow square body 11, and semi-circular friction plates 32 are installed on the non-threaded outer surfaces of the double-headed bolts 31. A rotating ring 33 is arranged on the side of the semi-circular friction plate 32 away from the hollow square body 11.

[0036] Among them, the material of the hollow square body 11 is nylon (polyamide), and the middle of the hollow square body 11 is hollow, so as to reduce the weight of the whole device and increase the buoyancy as much as possible.

[0037] The rotating ring 33 is sleeved on the outer surface of the double-headed bolt 31, and a nut 34 is arranged on the side of the rotating ring 33 away from the semi-circular friction plate 32. The nut 34 is threadedly installed on the double-headed bolt 31.

[0038] In this solution, the semi-circular friction plate 32 is designed to be rotatably sleeved on the non-threaded outer surface of the double-headed bolt 31; specifically, the semi-circular friction plate 32 can freely rotate on the double-headed bolt 31 by relying on gravity, and then generate a rotational friction effect when contacting with water.

[0039] In addition, this solution also has another working mode: the semi-circular friction plate 32 can slide on the non-threaded outer surface of the double-headed bolt 31 to achieve contact and separation in the up and down directions. This design enables the semi-circular friction plate 32 and the double-headed bolt 31 to achieve two different friction decomposition methods of rotational contact separation and up and down contact separation by changing their relative position relationships without using a fixed connection method. The semi-circular friction plate 32 is made of polytetrafluoroethylene material. The diagonal dimension of the hollow square body 11 is adapted to the inner surface diameter of the porous spherical shell 1, and the four corners of the hollow square body 11 are clamped on the inner surface of the porous spherical shell 1.

[0040] Among them, the semi-circular friction plate 32 is fixed on the hollow square body 11 through the double-headed bolt 31 and the nut 34. One side of the double-headed bolt 31 is threadedly screwed into the hollow square body 11 for fixation, the smooth position of the double-headed bolt 31 is sleeved with the semi-circular friction plate 32, and the other side is tightened with the nut 34 to prevent the semi-circular friction plate 32 from falling off. The function of the double-headed bolt 31 is to limit the degrees of freedom of the semi-circular friction plate 32 in the xyz directions, but does not limit the rotational degree of freedom of the semi-circular friction plate 32 around the double-headed bolt 31.

[0041] The specific implementation process of the above embodiments is as follows;

[0042] Principle of the device of the present invention:

[0043] The principle of tribocatalysis lies in that the electrons and holes generated on the surface of the material after friction react with water and oxygen in the water to form hydroxyl radicals and superoxide radicals, and finally oxidize and decompose organic pollutants into harmless water and carbon dioxide.

[0044] Therefore, this device should meet:

[0045] 1. The device can automatically generate electrons and holes on the surface of the material by friction.

[0046] 2. The surface that generates electrons and holes after the device is rubbed should be able to contact with water.

[0047] The present device is designed with a semi-circular friction plate 32. Under the action of no water wave impact, the internal friction device is in a stable state, that is, all semi-circular friction plates 32 are in the lowest position of the center of gravity under the action of gravity. After being impacted by water waves, the semi-circular friction plate 32 first moves with the movement of the hollow square body 11 under the action of inertia force. At this time, the semi-circular friction plate 32 is not in the lowest position of the center of gravity, and the semi-circular friction plate 32 is in an unstable state. After the inertia force disappears, the semi-circular friction plate 32 will return to the lowest position of the center of gravity under the action of gravitational potential energy, that is, return to the stable state. Therefore, under the continuous action of water wave impact, the semi-circular friction plate 32 will repeatedly repeat the process from the stable state → the unstable state → the stable state, repeat the friction phenomenon of contacting and separating with the hollow square body 11, and will repeatedly expose the friction surface to contact with water. Therefore, the purpose of catalytic degradation can be achieved.

[0048] Under the impact of seawater, the whole sphere of this device moves in an indefinite direction with the water flow impact. At this time, the water body containing organic pollutants (such as seawater) is uniformly injected into the porous spherical shell. For example, after seawater enters the porous spherical shell 1, the internal friction device moves with the sphere, and the internal semi-circular friction plate 32 will follow to an indefinite position. Under the action of gravity, the semi-circular friction plate 32 will always return from the indefinite position after impact to the fixed position.

[0049] (The fixed position is vertically downward).

[0050] Existing technologies all rely on the drive of high-frequency energy, such as magnetic stirrers, such as ultrasonic instruments. This kind of technology requires a harsh environment and consumes a large amount of energy, and it is relatively difficult to be used in actual industrial production. The present invention does not require a high-frequency external driving force, nor does it require a power supply installed inside the device itself. It can achieve the tribocatalysis effect only by the low-frequency energy driven by water waves and its own gravity.

[0051] Example 2;

[0052] Different from Example 1, methyl orange was selected as the organic pollutant in this experiment. Therefore, a methyl orange solution was prepared as the solution to be degraded to measure the friction-catalyzed degradation efficiency.

[0053] In this experiment, the absorbance parameters of methyl orange solutions with different concentrations were first measured using a solution absorbance measuring device. As Figure 5 shown, combining with Lambert-Beer's law, a linear fitting was performed on the solution absorbance and solution concentration, and then the mathematical relationship between the methyl orange solution absorbance and solution concentration was deduced.

[0054] In this experiment, a small amount of methyl orange powder was prepared into a 20 mg / L methyl orange solution to fully dissolve the methyl orange powder. Then, 10 ml of the prepared methyl orange solution was taken and diluted with 30 ml of water to 5 mg / L for the experiment.

[0055] After seven repeated experiments (see Figure 6 、 Figure 7 ), it can be obtained that the developed contact-separation triboelectrification catalytic device has a catalytic degradation effect on the methyl orange solution, and the contact-separation triboelectrification catalytic degradation effect is stable. After 3 h (about 1350 times of contact separation), the average degradation amount of the methyl orange solution concentration is 2.13 mg / L, and the average degradation rate of the methyl orange solution is 42.61%.

[0056] The materials of the present invention are simple and easy to obtain, and are easy to recycle and replace without causing pollution. At present, most of the friction-catalyzed degradation technologies make the materials into small granular shapes in order to increase the friction area and collision area, thereby greatly improving the electrification phenomenon and thus enhancing the degradation effect of friction catalysis. However, the granular friction materials are difficult to recycle, and at the same time, if directly discarded, they will also cause pollution. The friction pairs of the present invention are the large-sized hollow square body 11 and the semi-circular friction plate 32, which are difficult to fail under the protection of the porous spherical shell 1, and the semi-circular friction plate 32 can be replaced in time. And if the device needs to be scrapped, the present invention is easier to recycle.

[0057] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0058] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and permutations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contact-separation type friction catalytic device, characterized in that It includes a porous spherical shell (1), in which a hollow square body (11) is installed. The contact separation type friction catalytic device further includes a semi-circular friction plate (32), and the semi-circular friction plates (32) are uniformly arranged on the hollow square body (11).

2. The contact-separation type friction catalysis device according to claim 1, characterized in that: The porous spherical shell (1) is made of ordinary plastic, and its appearance is transparent for easy observation. The porous spherical shell (1) is composed of two semi-spherical shells.

3. The contact-separation type friction catalytic device according to claim 1, wherein: The porous spherical shell (1) is uniformly provided with water injection holes (21), and the water injection holes (21) are used for uniformly injecting the water body containing organic pollutants into the interior of the porous spherical shell (1).

4. The contact-separation type friction catalysis device according to claim 1, wherein: Double-headed bolts (31) are uniformly installed in the hollow square body (11) in a threaded manner. The semi-circular friction plates (32) are installed on the non-threaded outer surfaces of the double-headed bolts (31). A rotating ring (33) is arranged on the side of the semi-circular friction plate (32) away from the hollow square body (11).

5. The contact-separation type friction catalytic device according to claim 4, characterized in that: The rotating ring (33) is sleeved on the outer surface of the double-headed bolt (31). A nut (34) is arranged on the side of the rotating ring (33) away from the semi-circular friction plate (32), and the nut (34) is threadedly installed on the double-headed bolt (31).

6. The contact-separation type friction catalysis device according to claim 5, characterized in that: The semi-circular friction plate (32) is made of polytetrafluoroethylene material. The diagonal dimension of the hollow square body (11) is adapted to the inner surface diameter of the porous spherical shell (1), and the four corners of the hollow square body (11) are clamped on the inner surface of the porous spherical shell (1).

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