Unpowered moving source tail gas nanometer purification box

Abstract

The invention relates to the technical field of air pollution treatment, and discloses an unpowered moving source tail gas nano purification box which comprises a shell, an airflow guiding system, an internal adsorption module and a photocatalysis module. A supporting structure is mounted on the shell; the airflow guiding system is arranged on the outer wall of the shell, an inner cavity of the shell communicates with the outside through the airflow guiding system, and the airflow guiding system forms an airflow channel in the inner cavity of the shell. The internal adsorption module is detachably connected to the inner wall of the shell, and the airflow channel penetrates through the internal adsorption module; and the photocatalysis module is arranged on the outer wall of the shell. The device can achieve the synergistic effect of passive physicochemical adsorption and photocatalytic oxidation, achieves efficient purification of moving source tail gas pollutants in ambient air, has efficient adsorption and photocatalytic degradation capabilities, does not need external energy for driving, and is flexible to install and low-frequency to maintain.

Description

A non-powered mobile exhaust gas nano-purification box Technical Field

[0001] This invention relates to the field of air pollution control technology, and in particular to a non-powered mobile exhaust gas nano-purification box. Background Technology

[0002] With the acceleration of urbanization and the continuous growth of motor vehicle ownership, mobile sources have become a significant source of urban air pollution. Their exhaust fumes contain a large number of primary pollutants, such as particulate matter, nitrogen oxides, carbon monoxide, hydrocarbons, and volatile organic compounds. These pollutants not only directly harm human health but are also important precursors to secondary pollution such as ozone and secondary particulate matter, exacerbating smog and photochemical smog pollution.

[0003] Existing technologies for motor vehicle exhaust aftertreatment, including three-way catalytic converters, diesel particulate filters, and selective catalytic reduction systems, can treat pollutants, but are only effective for specific vehicles and suffer from low cold-start efficiency, high costs, and complex maintenance. They cannot address the pollution from a large number of in-use non-standard vehicles and older vehicles. Roadside and roadside fixed air purification technologies, such as spray dust suppression systems, large electrostatic precipitators, and photocatalytic building materials, attempt to intercept and purify pollutants during diffusion, but suffer from drawbacks such as high water consumption, high energy consumption, high installation and operating costs, low purification efficiency, or susceptibility to environmental conditions. Urban macro-management measures, such as vehicle restrictions and the promotion of new energy vehicles, while achieving significant macro-emission reduction effects, are long-term projects and cannot quickly address real-time pollution exposure issues in sensitive local areas.

[0004] Existing technologies have common shortcomings: they cannot achieve "ground-based purification," meaning they lack effective purification methods in areas sensitive to pedestrian and residential activity; they rely on external energy and continuous operation and maintenance, resulting in high costs and difficulty in widespread adoption; their purification functions are limited, lacking the ability to synergistically purify complex exhaust gas components; and their passive technology is inefficient, with actual purification effects far below theoretical values.

[0005] To address this, a non-powered mobile exhaust gas nano-purification box is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a non-powered mobile exhaust gas nano-purification box, which aims to solve or improve at least one of the above-mentioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following solution: The present invention provides a non-powered mobile exhaust gas nano-purification box, comprising: an outer shell, on which a supporting structure is installed; an airflow guiding system, which is formed on the outer wall of the outer shell, and the inner cavity of the outer shell is connected to the outside through the airflow guiding system, the airflow guiding system forming an airflow channel in the inner cavity of the outer shell; an internal adsorption module, which is detachably connected to the inner wall of the outer shell, and the airflow channel passes through the internal adsorption module; and a photocatalytic module, which is disposed on the outer wall of the outer shell.

[0008] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the airflow guiding system includes an air intake grille and an exhaust grille, the air intake grille and the exhaust grille being respectively installed on opposite side walls of the outer shell to form the airflow channel; the air intake grille faces the direction of the pollution source.

[0009] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the photocatalytic module adopts a photocatalytic coating, and the photocatalytic coating is attached to the outer wall of the shell by spraying, impregnation or sintering process.

[0010] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the raw material of the photocatalytic coating includes any one or more of nano-titanium dioxide, nano-titanium dioxide doped with N and / or C, and nano-titanium dioxide loaded with noble metals.

[0011] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the support structure is an adjustable bracket, and the adjustable bracket is fixedly installed at the bottom of the outer shell.

[0012] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the support structure is a suspension component, and the suspension component is fixedly installed at the bottom of the outer shell.

[0013] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the internal adsorption module includes a frame detachably connected to the inner wall of the outer shell, and the frame is filled with a porous medium.

[0014] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the porous medium is made of a high specific surface area adsorption material, and the high specific surface area adsorption material includes modified activated carbon or molecular sieve.

[0015] According to the present invention, a non-powered mobile exhaust gas nano-purification box is provided, wherein the outer shell is in the shape of a cube or a cylinder.

[0016] This invention discloses the following technical effects: By integrating the internal adsorption module, photocatalytic module, and airflow guidance system into a single housing, this invention achieves a synergistic effect of passive physicochemical adsorption and photocatalytic oxidation, thereby achieving highly efficient purification of mobile source exhaust pollutants in ambient air. It combines highly efficient adsorption and photocatalytic degradation capabilities, requires no external energy drive, offers flexible installation, and requires low-frequency maintenance. It can be directly deployed in the most polluted microenvironments along roadsides, especially in densely populated and sensitive areas, achieving highly efficient "near-source" purification of mobile source exhaust gases. Furthermore, the supporting structure allows for flexible installation of the housing, and multiple nano-purification boxes can be densely deployed along roadsides, in schools, and residential areas. Located near pollution-sensitive areas, this device utilizes natural wind and airflow generated by vehicle movement as driving forces to directly intercept and purify exhaust gases that have diffused into the ambient air. Through internal adsorption and photocatalytic modules, it achieves both efficient adsorption and photocatalytic degradation, adsorbing and photocatalytically decomposing gaseous pollutants (such as NOx and VOCs). This overcomes the limitations of spray systems, which only suppress dust and have a single function, enabling synergistic purification of complex exhaust gas components. Furthermore, the device guides and constrains polluted airflow at high speed through the airflow channel via an airflow guidance system, increasing the contact frequency and residence time between pollutants and the internal adsorption modules. The internal adsorption modules are detachable for easy replacement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a schematic diagram of the support structure in the present invention; Figure 3 is a schematic diagram of the internal adsorption module in the present invention.

[0019] Among them, 1. outer shell; 2. supporting structure; 3. airflow guiding system; 4. internal adsorption module; 41. frame; 42. porous medium. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Referring to Figures 1-3, this invention provides a non-powered mobile source exhaust gas nano-purification box, comprising: a shell 1, on which a support structure 2 is installed; an airflow guiding system 3, which is formed on the outer wall of the shell 1, and the inner cavity of the shell 1 is connected to the outside through the airflow guiding system 3, forming an airflow channel in the inner cavity of the shell 1; an internal adsorption module 4, which is detachably connected to the inner wall of the shell 1, and the airflow channel passes through the internal adsorption module 4; and a photocatalytic module, which is located on the outer wall of the shell 1. With this configuration, this invention integrates the internal adsorption module 4, the photocatalytic module, and the airflow guiding system 3 into a single shell 1, achieving a synergistic effect of passive physicochemical adsorption and photocatalytic oxidation, thereby achieving highly efficient purification of mobile source exhaust gas pollutants in ambient air. It possesses both high-efficiency adsorption and photocatalytic degradation capabilities, requires no external energy drive, is flexible in installation, requires low-frequency maintenance, and can be directly deployed on roads with the highest pollution concentrations. This invention enables highly efficient "near-source" purification of exhaust gases from mobile sources, particularly in densely populated and sensitive areas. The supporting structure 2 allows for flexible installation of the outer shell 1. Multiple nano-purification boxes can be densely deployed near pollution-sensitive areas such as roadsides, schools, and residential areas. Utilizing natural wind and airflow generated by vehicle movement as driving forces, the exhaust gases directly intercept and purify those already diffused into the ambient air. The internal adsorption module 4 and photocatalytic module achieve both efficient adsorption and photocatalytic degradation, adsorbing and photocatalytically decomposing gaseous pollutants (such as NOx and VOCs). This overcomes the limitations of spray systems, which only suppress dust and have limited functionality, achieving synergistic purification of complex exhaust gas components. Furthermore, the airflow guidance system 3 guides and constrains the polluted airflow through the airflow channel at high speed, increasing the contact frequency and residence time between pollutants and the internal adsorption module 4. The internal adsorption module 4 is detachable for easy replacement.

[0023] Further optimizing the design, the airflow guiding system 3 includes an intake grille and an exhaust grille, which are respectively installed on opposite side walls of the outer casing 1 to form airflow channels. The intake grille faces the direction of the pollution source. During operation, relying on natural wind and airflow generated by vehicle movement as driving force, the intake grille, facing the pollution source (road, vehicle direction), can accurately capture polluted airflow spreading to the surrounding area of ​​the equipment, reducing the escape of polluted airflow. At the same time, the grille structure can initially intercept fine particles mixed in the airflow, preventing particles from clogging the subsequent internal adsorption module 4. The exhaust grille is set opposite to the intake grille, and the two work together to form a regular and unobstructed airflow channel, constraining the polluted airflow to flow along a preset path through the internal adsorption module 4, avoiding airflow turbulence and improving airflow circulation efficiency. In addition, the grille structure facilitates subsequent cleaning and maintenance, allowing for regular cleaning of particles attached to the grille surface to ensure unobstructed airflow channels and guarantee the stability and continuity of the equipment's non-powered purification.

[0024] Further optimization of the design involves a photocatalytic coating on the photocatalytic module. This coating is applied to the outer wall of the housing 1 via spraying, impregnation, or sintering. During operation, the photocatalytic coating adheres directly to the outer wall of housing 1, maximizing the area that can receive natural light (or auxiliary lighting). This eliminates the need for additional complex photocatalytic devices, simplifying the equipment structure while ensuring the coating fully absorbs light energy and generates highly oxidizing free radicals. These free radicals then undergo photocatalytic oxidation with pollutants, completely degrading them into harmless small molecules for deep purification. The spraying, impregnation, or sintering process ensures a tight bond between the photocatalytic coating and the outer wall of housing 1, preventing it from detaching and extending the lifespan of the photocatalytic module. Simultaneously, the coating evenly covers the outer wall of housing 1, improving light energy utilization and further enhancing the photocatalytic degradation effect, thus meeting the requirements for long-term stable operation without power.

[0025] Further optimization of the scheme involves using photocatalytic coatings made from one or more of the following: nano-titanium dioxide, nano-titanium dioxide doped with N and / or C, and nano-titanium dioxide loaded with noble metals (such as Ag and Pt). Under natural light (especially ultraviolet light), the photocatalytic coating generates highly oxidizing electron-hole pairs, which can catalytically oxidize gaseous pollutants (such as NOx and VOCs) adsorbed on the outer shell surface or escaping from the interior into harmless CO2, H2O, nitrates, etc.

[0026] The design is further optimized by using an adjustable bracket for support structure 2, which is fixedly installed at the bottom of the outer shell 1. The adjustable bracket can flexibly adjust its height and angle according to the actual terrain and pollution source height of the installation scenario (roadsides, school perimeter, etc.), thereby adjusting the installation height and tilt angle of the outer shell 1. This allows the air intake grille to be precisely oriented towards the pollution source (vehicle driving direction), maximizing the capture of polluted airflow and avoiding problems such as poor airflow guidance and pollutant escape caused by improper installation angle.

[0027] The scheme is further optimized so that the support structure 2 is a suspension component, which is fixedly installed at the bottom of the outer shell 1. The outer shell 1 is suspended on a fixed carrier such as a bracket or wall through the suspension component, without occupying ground space. It can be flexibly deployed in areas with dense population and limited ground space. At the same time, it is easy to adjust the installation position of the outer shell 1 so that the air intake grille is accurately oriented towards the pollution source, ensuring that the polluted airflow can enter the airflow channel efficiently.

[0028] In a further optimized design, the internal adsorption module 4 includes a frame 41 that is detachably connected to the inner wall of the outer shell 1, and the frame 41 is filled with a porous medium 42.

[0029] To further optimize the design, the porous media body 42 is made of a high specific surface area adsorbent material, including modified activated carbon or molecular sieves. The high specific surface area adsorbent material is processed into a granular, honeycomb, or fibrous structure to form the porous media body 42.

[0030] Further optimization of the design resulted in the outer casing 1 being either a cube or a cylinder. The outer casing 1 is made of weather-resistant engineering plastic or corrosion-resistant metal to improve its service life.

[0031] To further optimize the design, the internal adsorption module 4 adopts a partitioned filling structure, with a coarse filter layer (for intercepting large particles) and a high-efficiency adsorption layer (for capturing fine particles and gaseous pollutants) arranged sequentially along the airflow direction to extend the overall service life and optimize pressure drop.

[0032] Further optimization of the design: the outer wall of the outer shell 1 is provided with a modular splicing structure, which includes splicing buckles and sealing gaskets. The splicing buckles are installed on the two side walls of the outer shell 1 (the side not for air intake and exhaust grilles), and the sealing gaskets are attached to the inner side of the splicing buckles; it is suitable for cubic or cylindrical outer shells 1.

[0033] It enables rapid modular assembly of multiple devices without the need for additional supports. Multiple nano-purification boxes are tightly connected via splicing clips to form a large purification array, expanding the pollution interception and purification range. Sealing gaskets ensure a tight seal at the splicing points, preventing airflow from escaping through the gaps and ensuring that airflow flows along the preset channels through the adsorption and photocatalysis areas, improving the efficiency of multi-device collaborative purification. It is suitable for dense deployment in heavily polluted areas such as roadsides and large residential areas, and is easy to install with flexible adjustment of the array size.

[0034] Further optimization involves detachably connecting a front-mounted dust filter and a primary filter to the inner side of the air intake grille, fitting snugly against the grille and positioned at the front of the airflow channel. This pre-treats the polluted airflow entering the outer casing 1. The front-mounted dust filter intercepts larger particles (such as dust and vehicle exhaust particles) in the airflow, while the primary filter filters fine dust, preventing particles from entering the internal adsorption module 4 and clogging the porous media 42. This extends the service life of the internal adsorption module 4 and reduces maintenance frequency.

[0035] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A non-powered mobile exhaust gas nano-purification box, characterized in that, include: The outer shell (1) is equipped with a support structure (2); the airflow guiding system (3) is located on the outer wall of the outer shell (1), and the inner cavity of the outer shell (1) is connected to the outside through the airflow guiding system (3), and the airflow guiding system (3) forms an airflow channel in the inner cavity of the outer shell (1); the internal adsorption module (4) is detachably connected to the inner wall of the outer shell (1), and the airflow channel passes through the internal adsorption module (4); the photocatalytic module is located on the outer wall of the outer shell (1).

2. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The airflow guiding system (3) includes an air intake grille and an exhaust grille, which are respectively installed on opposite side walls of the outer casing (1) to form the airflow channel; the air intake grille faces the direction of the pollution source.

3. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The photocatalytic module employs a photocatalytic coating, which is attached to the outer wall of the outer shell (1) by spraying, impregnation, or sintering processes.

4. The non-powered mobile exhaust gas nano-purification box according to claim 3, characterized in that: The raw materials for the photocatalytic coating include any one or more of nano-titanium dioxide, N-doped and / or C-doped nano-titanium dioxide, and nano-titanium dioxide loaded with noble metals.

5. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The support structure (2) is an adjustable bracket, which is fixedly installed at the bottom of the outer shell (1).

6. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The support structure (2) is a suspension component, which is fixedly installed at the bottom of the outer shell (1).

7. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The internal adsorption module (4) includes a frame (41) detachably connected to the inner wall of the outer shell (1), and the frame (41) is filled with a porous medium (42).

8. The non-powered mobile exhaust gas nano-purification box according to claim 7, characterized in that: The porous medium (42) is made of a high specific surface area adsorbent material, which includes modified activated carbon or molecular sieve.

9. The non-powered mobile exhaust gas nano-purification box according to claim 1, characterized in that: The outer shell (1) is cube-shaped or cylindrical.

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