Fuming cupboard with emission treatment function

Abstract

The utility model provides a fuming cupboard with a waste gas emission treatment function. The fuming cupboard is suitable for working environments involving toxic and harmful substances, such as physical material high and low temperature synthesis, chemical experiments, pharmaceutical experiments, microbiological experiments and the like. The fuming cupboard is composed of a high-strength stainless steel cupboard body, a cupboard door, a support, a bottom plate, a patch board, an exhaust system and a gas dust treatment device. And the inner wall of the cabinet body is coated with a polytetrafluoroethylene anti-corrosion coating, so that the cabinet body can resist chemical corrosion in long-term use. The cabinet door has heat resistance and chemical corrosion resistance, so that experimenters can be effectively protected, and meanwhile, the visibility of operation is ensured. The exhaust system is connected with the gas dust treatment device through a high-temperature-resistant tin foil exhaust pipe, waste gas is treated through a double-layer filtering system, and pollution to the environment is reduced. The device effectively treats harmful substances in waste gas through activated carbon adsorption and a liquid layer. The fuming cupboard can effectively treat poisonous and harmful gas and dust generated in an experiment, guarantees the safety of experimenters, reduces environmental pollution, and has wide application prospects.

Description

Technical Field

[0001] This invention relates to the field of laboratory equipment technology, and in particular to a novel fume hood with protective and treatment functions for toxic and hazardous substances. Background Technology

[0002] Fume hoods are essential equipment used to protect operators from toxic and harmful gases, vapors, dust, and chemical evaporation during operations. Toxic and harmful gases and dust are typically generated during experiments. Most existing fume hoods directly release exhaust gases into the atmosphere without the ability to collect them. While this provides some protection for operators, the direct emission of exhaust gases pollutes the environment. Therefore, there is an urgent need for a fume hood that can effectively treat exhaust gases to improve laboratory safety and environmental friendliness. Summary of the Invention

[0003] The purpose of this invention is to provide a novel fume hood that allows for high-temperature and high-pressure experiments, observation of reaction processes, and the collection and treatment of harmful gases and dust generated during the reaction, thus preventing environmental pollution. Furthermore, the fume hood designed in this invention is an independent, mobile fume hood, allowing air to circulate within it. It can be used independently in laboratories without relying on other auxiliary equipment, making it suitable for working environments involving toxic and hazardous substances, such as high- and low-temperature synthesis of physical materials, chemical experiments, pharmaceutical experiments, and microbiological experiments.

[0004] To achieve the above objectives, the present invention provides a novel fume hood, characterized by comprising the following components:

[0005] Cabinet: Constructed from thick, high-strength stainless steel, high-manganese steel, aluminum alloy, and other metal materials. The inner wall of the cabinet is coated with a polytetrafluoroethylene (PTFE) anti-corrosion coating to ensure its resistance to chemical corrosion during long-term use. The workbench is located inside the cabinet, where experimental operations, equipment placement, and reactions are conducted.

[0006] Cabinet door: The observation surface of the cabinet is made of polycarbonate sheet or tempered glass with handles and is installed on the cabinet via a sliding rail. The cabinet door is transparent, allowing observation of the experimental reaction process. It has high impact resistance, heat resistance, and chemical corrosion resistance, and is not easily broken, which can effectively protect the safety of experimental personnel, while facilitating the operation and observation of the experimental process.

[0007] Support frame: Made of thick, high-strength stainless steel, high-manganese steel, aluminum alloy and other metal materials, and welded to the cabinet body to support the cabinet at a suitable operating height, making it convenient for laboratory personnel to operate.

[0008] Base plate: The stainless steel base plate is made of stainless steel and welded to the support frame. It is used to place experimental items and gas and dust treatment devices.

[0009] Power strip: The back of the cabinet has through holes through which the power strip connects to the power source. The power strip has multiple sockets to connect various experimental equipment. It features a waterproof and dustproof design and a built-in overload protection device to ensure the safety of experimental operations.

[0010] Exhaust System: The exhaust system consists of an exhaust fan, air inlet, air outlet, and a high-temperature resistant tin foil exhaust pipe. A through-hole at the top of the cabinet connects to the exhaust fan, and the exhaust pipe connects to the gas dust treatment device. The air inlet and exhaust outlet are located on the sides of the cabinet and the gas dust treatment device, respectively. The air inlet of the fume hood is located at the bottom of the side of the fume hood, transporting free gas from bottom to top to the exhaust fan at the top of the fume hood, preventing dust from accumulating at the bottom. The vent of the gas dust treatment device is located at the top of the side of the device, effectively expelling the purified air. When the cabinet valve is closed, outside gas enters through the cabinet vent, carrying waste gas into the exhaust system. After being absorbed and purified in the gas dust treatment device, it is discharged into the atmosphere through the exhaust outlet of the gas dust treatment device. The fume hood is always in a circulating state, purifying the air in the laboratory space where the fume hood is located, capable of purifying 150-3000 cubic meters of air per hour. The tin foil exhaust pipe has high temperature resistance and corrosion resistance, and can withstand the high temperature gas and dust generated during the experiment. It ensures that the exhaust gas enters the tin foil exhaust pipe through the exhaust fan and is finally introduced into the gas and dust treatment device, avoiding the exhaust gas from being directly discharged into the atmosphere.

[0011] Gas and Dust Treatment Device: This device includes a casing, a tin foil exhaust pipe, a liquid layer, a porous isolation plate, an activated carbon filter layer, an exhaust port, and a perforated cover. It features a dual-layer filtration system for effectively treating harmful gases and dust generated during experiments. The casing is made of thick, corrosion-resistant stainless steel, high-manganese steel, aluminum alloy, or other metal materials, with a polytetrafluoroethylene (PTFE) anti-corrosion coating on its inner wall to ensure resistance to chemical corrosion during long-term use. The device comprises a dual-layer treatment system: a liquid layer and an activated carbon adsorption layer, used to effectively remove harmful gases and dust generated during experiments. The liquid layer is typically water, sodium hydroxide solution, or dilute sulfuric acid solution, which allows most dust to settle to the bottom of the device and absorbs harmful gases. When the liquid layer is a dilute sodium hydroxide solution, it can absorb acidic gases such as hydrogen chloride and hydrogen sulfide; when the liquid layer is water or dilute sulfuric acid solution, it can absorb ammonia. The tin foil exhaust pipe is inserted into the liquid layer to a certain depth, allowing free gas to flow within the liquid layer before escaping. The porous isolation plate is a stainless steel structure with numerous fine pores, featuring a central hole through which the tin foil exhaust pipe can pass. The activated carbon filter layer, of a certain thickness, is spread across the isolation plate around the tin foil exhaust pipe, effectively filtering and adsorbing any remaining toxic and harmful substances in the free gas after liquid layer treatment. The purified free gas is discharged into the atmosphere through the exhaust port. The perforated cap has a central hole that allows the tin foil exhaust pipe to pass through, and the edges of the hole are sealed with high-temperature insulating tape.

[0012] The beneficial effects of this invention are:

[0013] The high-strength cabinet and doors provide excellent protection, effectively preventing harm to operators from toxic and harmful substances released during experiments.

[0014] The anti-corrosion coating on the inner wall of the cabinet ensures that the cabinet can withstand chemical corrosion during long-term use and is durable.

[0015] The exhaust system uses a tin foil exhaust pipe, which can withstand high-temperature gases and high-temperature powder generated by the explosion, and guides the harmful gases and dust generated in the experiment into the treatment device, effectively reducing pollution to the atmospheric environment.

[0016] The sliding cabinet door facilitates experimental operations while ensuring visibility of the experimental process. Furthermore, its high impact resistance and unbreakable nature better protect the safety of experimental personnel. Attached Figure Description

[0017] The optimized embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which are shown in the drawings as follows:

[0018] Figure 1 This is a schematic diagram representing the embodiment in three-dimensional form;

[0019] Figure 2 This is a schematic diagram showing the embodiment from the front view;

[0020] Figure 3 This is a schematic diagram showing the embodiment as a side view;

[0021] Figure 4 This is a schematic diagram of the embodiment shown in top view;

[0022] The following numbers 1-10 are in the appendix. Figure 1-4 Consistent;

[0023] 1. Cabinet

[0024] 2. Cabinet doors

[0025] 3. Bracket

[0026] 4. Base plate

[0027] 5. Power strip

[0028] 6. Exhaust fan

[0029] 7. Tin foil exhaust pipe

[0030] 8. Gas dust treatment device

[0031] 9. Air vent

[0032] 10. Air Inlet

[0033] Figure 5 This is a cross-sectional view through the center, representing a schematic diagram of the gas dust treatment device in this embodiment.

[0034] 1. Outer shell

[0035] 2. Free gas

[0036] 3. Activated carbon filter cotton layer

[0037] 4. Liquid layer

[0038] 5. Tin foil exhaust pipe

[0039] 6. Air vent

[0040] 7. Porous partition plate

[0041] 8. Cover with perforation Detailed Implementation

[0042] Example 1:

[0043] As attached Figure 1As shown, a new type of fume hood includes a cabinet (1) made of welded metal plates to ensure high strength. The inner wall is coated with a polytetrafluoroethylene anti-corrosion coating to ensure resistance to chemical corrosion during long-term use. The observation surface of the cabinet is formed by a sliding cabinet door (2). The cabinet door is heat-resistant, chemically resistant, and not easily broken, which can protect the safety of the experimenters. At the same time, the cabinet door can slide left and right to facilitate the operation and observation of the reaction process. The cabinet is supported to a certain height by a stainless steel bracket (3) to facilitate the operation of the experimenters. A stainless steel base plate (4) is welded to the lower end of the bracket for placing experimental items and gas and dust treatment devices. The back of the cabinet has a through hole, through which the wires of the power strip (5) are connected to the power supply to power the experimental equipment placed in the fume hood. The upper end of the cabinet is connected to an exhaust fan (6) and a foil exhaust pipe (7). The foil exhaust pipe can withstand the high-temperature gas and high-temperature powder generated in the experiment and is connected to the gas and dust treatment device (8) to treat the waste gas and dust generated in the experiment. Outside air enters the fume hood through the air inlet (10), and together with the toxic and harmful gases inside, it enters the gas dust treatment device for treatment through the exhaust fan (6). The treated gas is discharged into the atmosphere through the exhaust port (9), thus realizing gas circulation.

[0044] When toxic or harmful substances are released during the experiment, the resulting harmful gases and dust are introduced into the treatment device through exhaust fans and tin foil exhaust pipes to prevent environmental pollution and harm to the human body.

[0045] Example 2:

[0046] As attached Figure 5 As shown: Working principle of gas dust treatment device

[0047] The working principle of the processing device includes the following processes:

[0048] Chemical treatment of harmful gases: Free gas (2) flows into the liquid layer (4) through the perforated cover (8), activated carbon filter cotton layer (3), and porous isolation plate (7) in the tin foil exhaust pipe (5). The liquid layer (4) is generally water, sodium hydroxide solution, or dilute sulfuric acid solution, which can cause most dust to settle at the bottom of the device and absorb harmful gases. When the liquid layer is dilute sodium hydroxide solution, it can absorb acidic gases, such as hydrogen chloride and hydrogen sulfide. When the liquid layer is water or dilute sulfuric acid solution, it can absorb ammonia. Solid dust will settle to the bottom of the device, and the bottom sediment can be cleaned regularly. Free gas (2) enters the activated carbon filter cotton layer (3) through the porous isolation plate (7). The volatile gases that are insoluble in water-soluble sodium hydroxide solution or dilute sulfuric acid solution in the free gas (2) pass through the activated carbon adsorption layer. Activated carbon has a well-developed pore structure and can adsorb harmful organic substances (such as benzene and toluene) in the gas, preventing them from being directly emitted into the atmosphere. The liquid layer can be added or replaced by pulling out the tin foil exhaust pipe. The activated carbon adsorption layer can be replaced periodically to maintain its adsorption efficiency. The purified free gas (2) is discharged into the atmosphere through the outlet (6).

[0049] The embodiments of the fume hood of the present invention exhibit high stability and robustness through an all-metal shell design and a high-strength cabinet door design. With rapid circulation of free gas and an effective gas and dust treatment device, it can not only effectively protect the safety of laboratory personnel, but also prevent harmful gases and dust from polluting the environment, and has broad application prospects.

Claims

1. A fume hood having a discharge treatment function, characterized by comprising: The cabinet body is made of thick stainless steel, high manganese steel, and aluminum alloy metal materials, and the inner wall is coated with a polytetrafluoroethylene corrosion-resistant coating. The cabinet door is made of a polycarbonate plate or tempered glass with a handle, which is installed on one side of the cabinet body through a slide rail. It has heat resistance, chemical corrosion resistance, and is not easy to break, making it convenient for operation and observation of the experimental process. The bracket is made of high-strength stainless steel, high manganese steel, and aluminum alloy metal materials, which is used to support the cabinet body to a suitable height for operation, making it convenient for the experimental personnel to operate. The bottom plate is a stainless steel bottom plate installed at the bottom of the bracket, which is used to place experimental items and gas dust treatment devices required for experiments. The power strip is connected to the power supply through a through hole and is fixed inside the cabinet body. It has waterproof and dustproof design and is equipped with an overload protection device. The exhaust system includes an exhaust fan and a tin foil exhaust pipe that is resistant to high temperature and corrosion. The exhaust pipe is connected to the gas dust treatment device, which can withstand harmful gases and dust generated during the experiment process, ensuring that the exhaust gas enters the tin foil exhaust pipe through the exhaust fan and is finally introduced into the gas dust treatment device. The cabinet body is made of thick high-strength stainless steel, high manganese steel, and aluminum alloy metal materials, and the inner wall is coated with a polytetrafluoroethylene corrosion-resistant coating to enhance its chemical corrosion resistance and ensure long-term use.

2. The fume hood of claim 1, wherein, One side of the cabinet body is made of a polycarbonate plate or tempered glass with high impact resistance and high temperature resistance, which is transparent in appearance, ensuring the safety of the experimental personnel while facilitating their operation and observation.

3. The fume hood of claim 1, wherein, The power strip is equipped with multiple jacks, which can connect multiple experimental equipment at the same time, and the power strip has waterproof, dustproof, and overload protection functions to ensure the safety of experimental operation.

4. The fume hood of claim 1, wherein, The tin foil exhaust pipe of the exhaust system has high temperature resistance and corrosion resistance, ensuring that the exhaust gas enters the tin foil exhaust pipe through the exhaust fan and is finally introduced into the gas dust treatment device, avoiding direct emission of exhaust gas into the atmosphere.

5. The fume hood of claim 1, wherein, The gas dust treatment device includes a double-layer treatment system, which is a liquid layer and an activated carbon adsorption layer, for effectively removing harmful gases and dust generated during the experiment.

6. The fume hood of claim 1, wherein, ​

Images