Laboratory fuming cupboard gas exhaust channel

Abstract

The utility model provides a laboratory fuming cupboard gas exhaust channel, which belongs to the technical field of laboratory fuming cupboard gas exhaust, and comprises a pipeline, a drainage plate, a pre-filtering module, a first-stage purification module, a second-stage purification module, a third-stage purification module and an exhaust port, the exhaust channel is used for introducing gas generated in the using process of the fuming cupboard into the exhaust channel; the pre-filtering module, the first-stage purification module, the second-stage purification module and the third-stage purification module are sequentially arranged in the pipeline and are used for filtering gas for multiple times; the drainage plate is further arranged in the pipeline, and the drainage plate and the pre-filtering module are arranged at intervals, so that the first-stage purification module, the second-stage purification module and the third-stage purification module are arranged at intervals; the problems that an existing gas exhaust channel of a laboratory fuming cupboard is poor in filtering effect and easily causes pollution to the environment can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of laboratory fume hood gas exhaust, concretely relates to a laboratory fume hood gas exhaust channel. BACKGROUND

[0002] Laboratory fume hood (also called fume hood) is a device used to protect experimenters from harmful gases, vapors or fumes. Its gas exhaust channel is an important part of the fume hood, responsible for exhausting harmful gases or pollutants from the laboratory to ensure air quality and personnel safety. Generally, the gas exhaust channel of the fume hood includes the following components: exhaust duct is the duct connecting the fume hood and the external exhaust system, usually made of corrosion-resistant materials such as stainless steel or plastic. The exhaust duct should avoid too many bends to keep the airflow smooth. The air in the fume hood is forced out by a fan, and the size and power of the fan should be selected according to the size of the laboratory and the type of fume hood. The fan system can be set independently or can be part of the overall laboratory ventilation system. The air exhausted by the fume hood must be discharged to the outside through appropriate systems such as exhaust towers, chimneys, etc. These systems must meet environmental and safety standards to avoid pollution to the outside world. Some special fume hoods (such as experiments with toxic and harmful gases) will be equipped with high-efficiency filtration devices (such as HEPA filters or activated carbon filters) to further purify the exhaust air. The top or back of the fume hood will usually have an exhaust port connected to the exhaust duct. Air is sucked from the fume hood and discharged through this exhaust port.

[0003] The existing laboratory fume hood gas exhaust channel has poor filtering effect and is easy to pollute the environment. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a laboratory fume hood gas exhaust channel, which can solve the problem of poor filtering effect of the existing laboratory fume hood gas exhaust channel and easy pollution of the environment.

[0005] The utility model is implemented as follows:

[0006] The utility model provides a laboratory fume hood gas exhaust channel, wherein, including pipeline, drainage board, prefilter module, first stage purification module, second stage purification module, third stage purification module and exhaust port, one end of pipeline is connected with fume hood, is used for introducing the gas produced in the use process of fume hood into exhaust channel, the inside of pipeline is sequentially provided with prefilter module, first stage purification module, second stage purification module and third stage purification module, is used for filtering gas multiple times, the inside of pipeline still is provided with drainage board, drainage board with prefilter module, is first stage purification module, second stage purification module, third stage purification module interval arrangement, is used for guiding gas flow path, the end of pipeline is provided with exhaust port, and the exhaust port is the horn shape structure.

[0007] On the basis of the above technical scheme, the laboratory fume hood gas exhaust channel of the utility model can also be improved as follows:

[0008] Among them, the drainage board is a spiral structure, and the side wall thereof is fixedly connected with the inner wall of the pipeline.

[0009] Further, the prefilter module is composed of a metal mesh structure and is made of stainless steel, which is used for removing large particles and dust.

[0010] Further, the metal mesh is in a multi-layer folded shape, which is used for increasing the filtering area and improving the filtering efficiency.

[0011] Further, the surface of the drainage board is provided with a plurality of protrusions, the protrusions are in an arc shape, and the protrusions are used for further adsorbing particles carried in the gas.

[0012] Further, the surface of the protrusions is provided with bristles.

[0013] Further, the first stage purification module is filled with granular activated carbon, which is used for adsorbing organic waste gas and peculiar smell.

[0014] Further, the second stage purification module adopts a HEPA high-efficiency filter, which is used for removing particles with a diameter less than 0.3 microns.

[0015] Further, the HEPA filter adopts a folding design, which increases the filtering area and reduces the wind resistance.

[0016] Further, the third stage purification module is a catalytic combustor, which is used for converting harmful gas into harmless carbon dioxide and water.

[0017] Compared with the prior art, the laboratory fume hood gas exhaust channel provided by the utility model has the following beneficial effects:

[0018] Duct: Connects the fume hood to the exhaust system, responsible for introducing harmful gases generated in the fume hood into the exhaust channel, and gradually cleaning through the filtering and purification modules.

[0019] Drainage plate: Directs gas flow, optimizing airflow path. By being spaced between each purification module, it enhances the filtering effect of the gas, and in the case of a spiral design, it can enhance the stability of the gas flow.

[0020] Pre-filter module: Composed of metal mesh, primarily used to remove large particulate matter and dust, preventing these larger substances from clogging subsequent purification modules. The multi-layered folded design of the metal mesh increases the filtering area, thereby improving efficiency.

[0021] Primary purification module: Filled with granular activated carbon, it adsorbs organic waste gas and odors, ensuring that harmful organic components in the gas are removed.

[0022] Secondary purification module: Uses HEPA high-efficiency filters, specifically designed to remove fine particulate matter with diameters less than 0.3 microns. The folded design not only increases the filtering area but also reduces airflow resistance, improving filtration efficiency.

[0023] Tertiary purification module: Catalytic combustor, its role is to convert harmful gases into harmless carbon dioxide and water through catalytic reaction, further ensuring the purification of the gas.

[0024] Exhaust port: Located at the end of the duct, designed as a horn structure, which helps to smoothly discharge the gas, reducing airflow vibration and noise during exhaust, ensuring flow rate and efficiency during the discharge process. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a structural diagram of a laboratory fume hood gas exhaust channel;

[0027] In the drawings, the component list represented by each number is as follows:

[0028] 10, duct; 20, drainage plate; 30, pre-filter module; 40, primary purification module; 50, secondary purification module; 60, tertiary purification module; 70, exhaust port. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.

[0030] As Figure 1 shown, it is an embodiment of the laboratory fume hood gas exhaust passage provided by the utility model, in the embodiment, including pipeline 10, drainage plate 20, pre-filter module 30, primary purification module 40, secondary purification module 50, tertiary purification module 60 and exhaust port 70, one end of pipeline 10 is connected with the fume hood, for introducing the gas generated in the use process of the fume hood into the exhaust passage, the inside of pipeline 10 is sequentially provided with pre-filter module 30, primary purification module 40, secondary purification module 50 and tertiary purification module 60, for filtering the gas for multiple times, the inside of pipeline 10 is further provided with drainage plate 20, drainage plate 20 is spaced apart from pre-filter module 30, primary purification module 40, secondary purification module 50 and tertiary purification module 60, for guiding the gas flow path, the end of pipeline 10 is provided with exhaust port 70, and exhaust port 70 is a horn-shaped structure.

[0031] Among them, in the above technical scheme, the drainage plate 20 is a spiral structure, and the side wall is fixedly connected with the inner wall of the pipeline 10.

[0032] Further, in the above technical scheme, the pre-filter module 30 is composed of a metal mesh structure, and is made of stainless steel material, for removing large particles and dust.

[0033] Further, in the above technical scheme, the metal mesh is in a multi-layer folded shape, for increasing the filtering area and improving the filtering efficiency.

[0034] Further, in the above technical scheme, the surface of the drainage plate 20 is provided with a plurality of protrusions, the protrusions are arc-shaped structures, for further adsorbing the particles carried in the gas.

[0035] Further, in the above technical scheme, the surface of the protrusion is provided with bristles.

[0036] Further, in the above technical scheme, the primary purification module 40 is filled with granular activated carbon, for adsorbing organic waste gas and peculiar smell.

[0037] Further, in the above technical scheme, the secondary purification module 50 adopts a HEPA high-efficiency filter, for removing particles with a diameter less than 0.3 microns.

[0038] Further, in the above technical scheme, the HEPA filter adopts a folding design, increases the filtering area and reduces the wind resistance.

[0039] Further, in the above technical solution, the three-stage purification module 60 is a catalytic combustor for converting harmful gases into harmless carbon dioxide and water.

[0040] Specifically, the principle of the utility model is: when starting to use the fume hood in the laboratory, first ensure that the power supply and airflow system of the fume hood have been started. Ensure that the fan of the fume hood is working normally and the airflow direction is correct, so as to guide the harmful gases generated in the experiment into the exhaust system. When the fume hood starts to run and produces harmful gases, the gases enter the pipeline system through the exhaust port of the fume hood. The pipeline guides the gas to the pre-filter module. In the pre-filter module, the metal mesh first traps large particles and dust, preventing these particles from clogging the subsequent filter modules. At this time, large particles are filtered out, and the gas becomes relatively clean. The airflow then enters the first-stage purification module, which is filled with granular activated carbon that can adsorb organic waste gas and odors in the gas. This stage mainly purifies volatile organic compounds (VOCs) and bad odors. The airflow will enter the second-stage purification module. This module uses a high-efficiency HEPA filter that can remove tiny particles smaller than 0.3 microns, such as fine dust, smoke, etc. This module increases the filtering area through a folding design and effectively reduces airflow resistance, ensuring efficient filtration. After passing through the second-stage purification module, the gas enters the third-stage purification module. This module is equipped with a catalytic combustor that can convert harmful gases in the airflow into harmless carbon dioxide and water through a catalytic reaction. This process further ensures that the discharged gas meets environmental protection requirements and is non-toxic and harmless. During the entire purification process, the flow guide plate plays a role in guiding the airflow. The flow guide plate can guide the gas through different purification modules, ensuring smooth airflow path and sufficient contact and filtration of the gas. Especially in the case of using a spiral flow guide plate, the gas flow will be more stable, enhancing the efficiency of the entire purification process. After three-stage purification, the gas will enter the exhaust port and be finally discharged to the outdoor or ventilation system through the horn-shaped exhaust port. The horn-shaped exhaust port helps to smoothly discharge the gas, reduces airflow resistance and noise during exhaust, and ensures smooth discharge of the gas.

Claims

1. A laboratory fume hood gas exhaust plenum, comprising: The utility model provides a fume exhaust device, including pipeline (10), drainage board (20), prefilter module (30), first purification module (40), secondary purification module (50), tertiary purification module (60) and exhaust port (70), one end of pipeline (10) is connected with fume hood, is used for the gas produced in fume hood use process is introduced to exhaust channel, the inside of pipeline (10) is sequentially provided with prefilter module (30), first purification module (40), secondary purification module (50) and tertiary purification module (60), is used for filtering gas multiple times, the inside of pipeline (10) is further provided with drainage board (20), drainage board (20) with prefilter module (30), is first purification module (40), secondary purification module (50), tertiary purification module (60) interval arrangement is used for guiding gas flow path, the end of pipeline (10) is provided with exhaust port (70), and exhaust port (70) is the horn-like structure.

2. A fume hood gas exhaust channel for a laboratory hood according to claim 1, wherein, The drainage board (20) is a spiral structure, and the side wall thereof is fixedly connected with the inner wall of the pipeline (10).

3. A fume exhaust channel for a laboratory fume hood according to claim 2, wherein, The prefilter module (30) is composed of a metal mesh structure and is made of stainless steel, which is used for removing large particles and dust.

4. A fume exhaust channel for a laboratory fume hood according to claim 3, wherein, The metal mesh is in a multi-layer folded shape, which is used for increasing the filtering area and improving the filtering efficiency.

5. A fume exhaust channel for a laboratory fume hood according to claim 4, wherein, The surface of the drainage board (20) is provided with a plurality of protrusions, which are in an arc structure and are used for further adsorbing particles carried in the gas.

6. A fume exhaust channel for a laboratory fume hood according to claim 5, wherein, The surface of the protrusion is provided with bristles.

7. A fume exhaust channel for a laboratory fume hood according to claim 6, wherein, The first purification module (40) is filled with granular activated carbon, which is used for adsorbing organic waste gas and odor.

8. A fume exhaust channel for a laboratory fume hood according to claim 7, wherein, The secondary purification module (50) adopts a HEPA high-efficiency filter, which is used for removing particles with a diameter less than 0.3 microns.

9. A fume exhaust channel for a laboratory fume hood according to claim 8, wherein, The HEPA high-efficiency filter adopts a folding design, which increases the filtering area and reduces the wind resistance.

10. A fume exhaust channel for a laboratory fume hood according to claim 9, wherein, The tertiary purification module (60) is a catalytic combustor, which is used for converting harmful gas into harmless carbon dioxide and water.

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