Laboratory ammonia-containing waste gas treatment device

Abstract

A laboratory ammonia-containing waste gas treatment device comprises a gas guide pipe, a treatment tank, an induced draft fan, an exhaust pipe and a spraying mechanism, the gas guide pipe is used for guiding out ammonia-containing waste gas in a laboratory into the treatment tank, and the induced draft fan is used for guiding out waste gas without ammonia gas from the interior of the treatment tank and discharging the waste gas from the exhaust pipe; and the spraying mechanism is used for performing water spraying operation in the treatment tank and absorbing and eliminating ammonia gas in the ammonia-containing waste gas entering the treatment tank. The laboratory ammonia-containing waste gas treatment device specially treats the laboratory ammonia-containing waste gas in a targeted manner, so that the purpose of efficiently and safely treating the laboratory ammonia-containing waste gas is achieved, and the harm of the ammonia-containing waste gas to experimental equipment and experimenters and possible potential safety hazards can be eliminated; the absorption and elimination liquid of the ammonia gas in the ammonia-containing waste gas is common water, other chemicals do not need to be added, the method is simple, efficient and free of secondary pollution, and the treated waste water can also be used as a liquid nitrogen fertilizer as a fertilizer for crops for environment-friendly utilization.

Description

Technical Field

[0001] The utility model relates to a laboratory waste gas treatment device, in particular to a treatment device for ammonia-containing waste gas in a laboratory, and belongs to the production and manufacturing technical field of laboratory safety and environmental protection devices. Background Art

[0002] Chemical laboratories often use different types of chemical reagents or substances with volatility, irritation, and even the ability to produce toxic and harmful gases. Especially inorganic acids and organic acids such as hydrochloric acid, sulfuric acid, nitric acid, and acetic acid that can form acidic gases. The acidic gases generated by these substances can cause great harm to experimental equipment and experimental personnel.

[0003] Generally, such acidic gases are uniformly discharged into a spray tower through an exhaust pipe in a laboratory fume hood, and are neutralized and absorbed after being sprayed with an alkaline solution, so as to achieve the purpose of eliminating the harm of acidic gases and protecting the environment.

[0004] However, when conducting chemical experiments, not only substances that can produce acidic gases are used, but also a large amount of solvents or other items that can produce alkaline gases are used. For example, the volatile reagent ammonia water will produce a large amount of ammonia gas, and some amino acid reactions will also produce ammonia gas.

[0005] The ammonia gas in the laboratory usually cannot achieve the purpose of neutralization and elimination through conventional alkaline solution spraying, that is, the existing alkaline solution spray tower cannot effectively neutralize ammonia gas to achieve the purpose of eliminating ammonia gas pollution. And the accumulation of ammonia gas in the waste gas pipe of the laboratory may react with nitrogen oxide gas to generate explosive ammonium nitrate gas. Therefore, there are certain safety hazards. Summary of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a laboratory ammonia-containing waste gas treatment device to timely and efficiently treat the ammonia-containing waste gas in the laboratory, eliminate the harm caused by the ammonia-containing waste gas to experimental equipment and experimental personnel and possible existing safety hazards, ensure the safety of the laboratory and effectively protect the environment. For this reason, the following technical solutions are specifically provided:

[0007] A laboratory ammonia-containing waste gas treatment device is used for treating ammonia-containing waste gas containing ammonia gas in a laboratory, and includes:

[0008] An air duct, a treatment tank, an induced draft fan, an exhaust pipe, and a spraying mechanism, wherein:

[0009] One end of the air duct is communicated with the laboratory, and the other end of the air duct is communicated with the air inlet of the treatment tank. The air duct is used to lead the ammonia-containing waste gas in the laboratory into the interior of the treatment tank;

[0010] The induced draft fan is arranged between the air outlet of the treatment tank and the air inlet end of the exhaust pipe, and is used to draw out the waste gas from which ammonia has been removed from the inside of the treatment tank and discharge the waste gas from which ammonia has been removed from the exhaust end of the exhaust pipe;

[0011] The spraying mechanism is connected to the treatment tank and is used to perform water spraying operations inside the treatment tank, so as to absorb and eliminate ammonia in the ammonia-containing waste gas entering the inside of the treatment tank.

[0012] Furthermore:

[0013] The treatment tank includes an air inlet hood, a main body shell and an air outlet hood. Among them, the main body shell is a box member, and the air inlet hood and the air outlet hood are respectively conical members. The air inlet hood and the air outlet hood are respectively arranged on both sides of the main body shell to form the outer shell of the olive-shaped treatment tank;

[0014] The interior of the main body shell is divided into a spraying and absorption section and a demisting and dehumidifying section, where:

[0015] Baffles are cross-arranged inside the spraying and absorption section to form an S-shaped multi-folded air duct. The folded air duct is also filled with hollow fillers, and a spraying pipe network of the spraying mechanism is also arranged at the top thereof. The spraying pipe network sprays water onto the fillers through its nozzles, so that ammonia contained in the ammonia-containing waste gas passing through the fillers can dissolve in water and be absorbed and eliminated;

[0016] The demisting and dehumidifying section is located behind the spraying and absorption section, and the demisting and dehumidifying section is filled with hollow balls, so that the waste gas from which ammonia has been removed becomes dry ammonia-removed waste gas after passing through the surface of the hollow balls to remove moisture.

[0017] Furthermore:

[0018] A water collection tank is also arranged at the bottom of the spraying and absorption section and the demisting and dehumidifying section, and the bottom of the water collection tank is communicated with the spraying mechanism to form a recycling component for the spraying water of the spraying mechanism.

[0019] Optionally, a viewing window is also arranged on the main body shell, and the viewing window is used to observe the working conditions inside the spraying and absorption section or the spraying and absorption section and the demisting and dehumidifying section.

[0020] Optionally, the filler is a Raschig ring made of plastic or ceramic material, and the hollow balls are made of plastic or ceramic material.

[0021] Furthermore:

[0022] The spraying mechanism also includes a water pump, a water tank and connecting pipe fittings, where:

[0023] The water outlet of the water pump is communicated with a spray pipe network with nozzles installed in the spray absorption section of the treatment tank through the connecting pipe fittings, and the water inlet of the water pump is communicated with the water tank and the bottom of the main body shell through the connecting pipe fittings.

[0024] Furthermore:

[0025] The connecting pipe fittings include a connecting pipe and a first three-way joint, where:

[0026] The water outlet of the water pump is communicated with the spray pipe network arranged inside the treatment tank through the connecting pipe, and the water inlet of the water pump is respectively communicated with the water tank and the bottom of the main body shell through the first three-way joint.

[0027] Furthermore:

[0028] The connecting pipe fittings further include a first switching valve, a second switching valve, a third switching valve and a second three-way joint, where:

[0029] The first switching valve is installed at the bottom of the main body shell and is connected with the first three-way joint through the second three-way joint to form a spray water circulation system of the spray mechanism communicated with the water pump;

[0030] The second switching valve is installed at the other outlet of the second three-way joint to form a sewage discharge channel of the spray mechanism;

[0031] The third switching valve connects the other connection port of the water tank and the first three-way joint to form a spray water replenishing system of the spray mechanism communicated with the water pump.

[0032] Furthermore, a conical rain shield is provided in a hollowed-out manner at the port of the exhaust end of the exhaust pipe.

[0033] Optionally, the air guide pipe, the treatment tank, the induced draft fan, the exhaust pipe, the spray mechanism are connected to each other respectively through flanges, and each component inside the spray mechanism is also connected through flanges.

[0034] Compared with the prior art, the beneficial effects and progress of the present utility model are as follows:

[0035] The laboratory ammonia-containing waste gas treatment device provided by the utility model includes a gas guide pipe, a treatment tank, an induced draft fan, an exhaust pipe and a spraying mechanism. Among them, the gas guide pipe is used to lead the ammonia-containing waste gas in the laboratory into the interior of the treatment tank, the induced draft fan is used to draw out the waste gas from which ammonia has been eliminated from the interior of the treatment tank and discharge it from the exhaust pipe, and the spraying mechanism is used to perform water spraying operations inside the treatment tank to absorb and eliminate ammonia in the ammonia-containing waste gas entering the treatment tank, achieving the purification purpose of efficiently treating the laboratory ammonia-containing waste gas, being able to eliminate the harm caused by the ammonia-containing waste gas to experimental equipment and experimental personnel and potential safety hazards, ensuring the safety of the laboratory and effectively protecting the environment;

[0036] The laboratory ammonia-containing waste gas treatment device provided by the utility model can independently treat the ammonia-containing waste gas in the laboratory, realizing the separate discharge and separate treatment of acidic gases and alkaline gases in the laboratory, thereby obtaining better treatment effects and eliminating the risk of potential explosive gases such as ammonium nitrate that may be formed in the ventilation duct by the ammonia-containing waste gas;

[0037] Since the laboratory ammonia-containing waste gas treatment device provided by the utility model specifically treats the laboratory ammonia-containing waste gas professionally, therefore, its device is more targeted, and at the same time has better adaptability. And during the treatment process, the absorption and elimination liquid for ammonia in the ammonia-containing waste gas can simply use ordinary water without adding other chemical substances, being simple, efficient and having no secondary pollution. The treated wastewater can also be used as liquid nitrogen fertilizer for crops for environmental protection utilization;

[0038] Obviously, the laboratory ammonia-containing waste gas treatment device provided by the utility model overcomes the deficiencies in the prior art, not only has high ammonia-containing waste gas treatment capacity, but also has a simple overall structure, is convenient for manufacturing, use and maintenance, has substantial characteristics and progress compared with the prior art, and therefore has great promotion and application value. Brief Description of the Drawings

[0039] To more clearly illustrate the technical solutions of the utility model, the following will briefly introduce the drawings required for the embodiments of the utility model.

[0040] Obviously:

[0041] The following drawings in the description are only the drawings of some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, but these other drawings also belong to the drawings required for the embodiments of the utility model.

[0042] Figure 1 It is a schematic front view structure diagram with some components of a laboratory ammonia-containing waste gas treatment device provided for an embodiment of the utility model partially cut open;

[0043] Figure 2 The figure is a schematic top view of a laboratory ammonia-containing waste gas treatment device provided by an embodiment of the present utility model, with a partial cross-section of the treatment tank shown.

[0044] In the figure:

[0045] 100 - air duct;

[0046] 200 - treatment tank, 210 - air inlet hood, 220 - main body shell, 221 - baffle plate, 222 - packing, 223 - hollow ball, 230 - air outlet hood, 240 - water collection tank;

[0047] 300 - induced draft fan;

[0048] 400 - exhaust pipe, 410 - rain shield;

[0049] 510 - spray pipe network, 511 - nozzle, 520 - water pump, 530 - water tank, 541 - connecting pipe, 542 - first three-way joint, 543 - first on-off valve, 544 - second on-off valve, 545 - third on-off valve, 546 - second three-way joint. Detailed implementation manners

[0050] To make the purposes, technical solutions, beneficial effects and remarkable progress of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings provided for the embodiments of the present utility model. Obviously, all the described embodiments are only partial embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0051] It should be noted that:

[0052] The terms "including" and any variations thereof in the specification and claims of the present utility model are intended to cover non-exclusive inclusion. For example, it includes not only a series of listed technical features and structural components, but also optionally includes technical features and structural components that are not listed, or optionally further includes the connection relationships between these technical features and structural components.

[0053] It should be understood that:

[0054] In the description of the embodiments of the present utility model, the directional or positional terms such as "upper", "lower", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the drawings of the embodiments of the present utility model, which are for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element must have a specific orientation, specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present utility model.

[0055] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or a movable connection, or a connection relationship that becomes an integral body. It can be a direct connection or an indirect connection through an intermediate medium. It can be the communication inside two structural elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] It should also be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in some embodiments.

[0057] Next, the technical solution of the present utility model will be described in detail with specific embodiments.

[0058] Embodiment

[0059] This embodiment provides a laboratory ammonia-containing waste gas treatment device for treating laboratory ammonia-containing waste gas.

[0060] As Figure 1 shown in the main view structural schematic diagram with some components of a laboratory ammonia-containing waste gas treatment device provided by the embodiment of the present utility model partially cut away, Figure 2 and the top view structural schematic diagram with the treatment tank of a laboratory ammonia-containing waste gas treatment device provided by the embodiment of the present utility model partially cut away:

[0061] A laboratory ammonia-containing waste gas treatment device includes:

[0062] An air duct 100, a treatment tank 200, an induced draft fan 300, an exhaust pipe 400, and a spraying mechanism, where:

[0063] One end of the air duct 100 is communicated with a laboratory (not shown in the figure), and the other end of the air duct 100 is communicated with the air inlet of the treatment tank 200. The air duct 100 is used to export the ammonia-containing waste gas in the laboratory (not shown in the figure) into the interior of the treatment tank 200.

[0064] An induced draft fan 300 is arranged between the outlet of the treatment tank 200 and the inlet end of the exhaust pipe 400, and is used to draw out the ammonia-eliminated waste gas from the interior of the treatment tank 200 and discharge the ammonia-eliminated waste gas from the exhaust end of the exhaust pipe 400;

[0065] The spraying mechanism is connected to the treatment tank 200 and is used to perform water spraying operations inside the treatment tank 200, so as to absorb and eliminate ammonia in the ammonia-containing waste gas entering the interior of the treatment tank 200.

[0066] From the above description, it can be seen that:

[0067] In the laboratory ammonia-containing waste gas treatment device provided in this embodiment, the air guide pipe is used to lead the ammonia-containing waste gas in the laboratory into the treatment tank, the induced draft fan is used to draw out the ammonia-eliminated waste gas from the treatment tank and discharge it from the exhaust pipe, and the spraying mechanism performs water spraying operations inside the treatment tank to absorb and eliminate ammonia in the ammonia-containing waste gas entering the treatment tank, so as to achieve the purpose of efficiently treating the laboratory ammonia-containing waste gas;

[0068] The laboratory ammonia-containing waste gas treatment device provided in this embodiment can independently treat the ammonia-containing waste gas in the laboratory, realize the separate discharge and separate treatment of acidic and alkaline gases in the laboratory, so as to obtain a better treatment effect, eliminate the risk and hidden danger of explosive gases such as ammonium nitrate that may be formed in the ventilation duct by the ammonia-containing waste gas, and the absorption and elimination liquid in the treatment process is ordinary water, without adding other chemical substances, which is simple, efficient and has no secondary pollution, and the waste water can also be recycled as fertilizer for crops;

[0069] Moreover, the overall structure of the treatment device is simple, and it is convenient to manufacture, use and maintain. Compared with the prior art, it has substantial features and progress. Therefore, it has great promotion and application value.

[0070] Furthermore, from Figure 1 and Figure 2 it can be seen that:

[0071] The treatment tank 200 includes an air inlet hood 210, a main body shell 220 and an air outlet hood 230. Among them, the main body shell 220 is a box-shaped member, and the air inlet hood 210 and the air outlet hood 230 are respectively conical members. The air inlet hood 210 and the air outlet hood 230 are respectively arranged on both sides of the main body shell 220 to form the outer shell of the olive-shaped treatment tank 200;

[0072] The interior of the main body shell 220 is divided into a spraying and absorption section and a demisting and dehumidifying section, where:

[0073] Inside the spray absorption section, baffles 221 are cross - arranged to form an S - shaped multi - bent air duct. The bent air duct is also filled with hollow fillers 222, and a spray pipe network 510 of the spray mechanism is arranged at its top. The spray pipe network 510 sprays water onto the fillers 222 through its nozzles 511, so that the ammonia gas in the ammonia - containing waste gas passing through the fillers 222 can dissolve in water and be absorbed and eliminated.

[0074] The demisting and dehumidifying section is located behind the spray absorption section, and the demisting and dehumidifying section is filled with hollow balls 223, so that the waste gas from which ammonia has been removed removes moisture after passing through the surface of the hollow balls 223 and becomes dry ammonia - removed waste gas.

[0075] It can be seen that:

[0076] The air inlet hood and the air outlet hood are respectively designed in a conical shape, which is conducive to the entry of ammonia - containing waste gas and the discharge of the waste gas after ammonia removal.

[0077] The internal part of the spray absorption section forms an S - shaped multi - bent air duct through the cross - arranged baffles, which can extend the traveling path and residence time of the ammonia - containing waste gas in the spray absorption section, thus facilitating the absorption and elimination of ammonia gas in the ammonia - containing waste gas by the spray water and improving the absorption and elimination rate.

[0078] Filling hollow fillers and hollow balls in the spray absorption section and the demisting and dehumidifying section respectively can further increase the contact area between the spray water and the ammonia - containing waste gas, and between the waste gas from which ammonia has been removed and the surface of the hollow balls, thereby further improving the elimination rate of ammonia gas and water vapor, and making the discharged gas purer.

[0079] Furthermore, from Figure 1 it can also be seen that a water collection tank 240 is arranged at the bottom of the spray absorption section and the demisting and dehumidifying section, and the bottom of the water collection tank 240 is connected to the spray mechanism to form a recycling component for the spray water of the spray mechanism.

[0080] Optionally, in the laboratory ammonia - containing waste gas treatment device provided in this embodiment, a viewing window (not shown in the figure) can be further arranged on the main body shell 220. The viewing window (not shown in the figure) is used to observe the working conditions in the spray absorption section or both the spray absorption section and the demisting and dehumidifying section.

[0081] Optionally, in the laboratory ammonia - containing waste gas treatment device provided in this embodiment, the fillers 222 in the spray absorption section can be Raschig rings made of plastic or ceramic materials, and the hollow balls 223 in the demisting and dehumidifying section can be made of plastic or ceramic materials.

[0082] Furthermore, from Figure 1 it can also be seen that:

[0083] In the laboratory ammonia-containing waste gas treatment device provided in this embodiment, the spraying mechanism further includes a water pump 520, a water tank 530, and connecting pipe fittings, where:

[0084] The water outlet of the water pump 520 is connected to a spraying pipe network 510 with nozzles 511 installed in the spraying absorption section of the treatment tank 200 through connecting pipe fittings, and the water inlet of the water pump 520 is connected to the water tank 530 and the bottom of the main body shell 220 through connecting pipe fittings.

[0085] Furthermore, it can also be seen from Figure 1 that:

[0086] In the laboratory ammonia-containing waste gas treatment device provided in this embodiment, the connecting pipe fittings in the spraying mechanism include a connecting pipe 541 and a first three-way joint 542, where:

[0087] The water outlet of the water pump 520 is connected to the spraying pipe network 510 arranged inside the treatment tank 200 through the connecting pipe 541, and the water inlet of the water pump 520 is respectively connected to the water tank 530 and the bottom of the main body shell 220 through the first three-way joint 542.

[0088] Furthermore, it can also be seen from Figure 1 that:

[0089] In the laboratory ammonia-containing waste gas treatment device provided in this embodiment, the connecting pipe fittings in the spraying mechanism further include a first on-off valve 543, a second on-off valve 544, a third on-off valve 545, and a second three-way joint 546, where:

[0090] The first on-off valve 543 is installed at the bottom of the main body shell 220 and is connected to the first three-way joint 542 through the second three-way joint 546 to form a spraying water circulation system of the spraying mechanism connected to the water pump 520;

[0091] The second on-off valve 544 is installed at the other outlet of the second three-way joint 546 to form a sewage discharge channel of the spraying mechanism;

[0092] The third on-off valve 545 connects the other connection port of the water tank 530 and the first three-way joint 542 to form a spraying water replenishing system of the spraying mechanism connected to the water pump 520.

[0093] Furthermore, it can also be seen from Figure 1 that a conical rain shield 410 is provided in a hollowed-out manner at the port of the exhaust end of the exhaust pipe 400.

[0094] Optionally, it can also be seen from Figure 1 that the air guide pipe 100, the treatment tank 200, the induced draft fan 300, the exhaust pipe 400, and the spraying mechanism are respectively connected to each other through flanges, and between the internal components of the spraying mechanism.

[0095] Obviously, connection via a flange can be more convenient and faster, and can further facilitate the disassembly, maintenance or replacement of components or members.

[0096] In summary, it can be seen that:

[0097] The present utility model constructs a treatment device capable of professionally treating ammonia-containing waste gas in a laboratory through an air duct, a treatment tank, an induced draft fan, an exhaust pipe and a spraying mechanism, overcomes the deficiencies in the prior art, can quickly and efficiently eliminate the harm caused by ammonia-containing waste gas to experimental equipment and experimental personnel and potential safety hazards, thus effectively ensuring the safety of the laboratory and achieving good environmental protection. Moreover, the overall structure of the treatment device is simple, and it is convenient to manufacture, use and maintain. The treatment medium used is ordinary water, and no other chemical substances need to be added additionally. It is simple, efficient and has no secondary pollution. The treated wastewater can also be used as liquid nitrogen fertilizer for crops, for environmental protection utilization. Compared with the prior art, it has substantial features and progress. Therefore, it has great promotion and application value.

[0098] During the description process of the above specification:

[0099] Descriptions of terms such as "this embodiment", "embodiment of the present utility model", "as shown in...", "further", etc. mean that the specific features, structures, materials or characteristics described in the embodiment are included in at least one embodiment of the present utility model. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment, and moreover, the specific features, structures, materials or characteristics, etc. described can be combined or combined in a suitable manner in any one or more embodiments; in addition, on the premise of not generating contradictions, those of ordinary skill in the art can combine or combine the different embodiments and the features of different embodiments described in this specification.

[0100] Finally, it should be noted that:

[0101] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent substitution on some or all of the technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions described in the embodiments of the present utility model. Non-essential improvements, adjustments or substitutions made by those skilled in the art according to the content recorded in this specification all fall within the scope required to be protected by the present utility model.

Claims

1. An ammonia-containing waste gas treatment device for laboratories, which is used for treating ammonia-containing waste gas containing ammonia in laboratories, and is characterized in that, Including: An air duct, a treatment tank, an induced draft fan, an exhaust pipe, and a spraying mechanism, wherein: One end of the air duct is communicated with the laboratory, and the other end of the air duct is communicated with the air inlet of the treatment tank. The air duct is used for leading the ammonia-containing waste gas in the laboratory into the interior of the treatment tank; The induced draft fan is arranged between the air outlet of the treatment tank and the air inlet end of the exhaust pipe, and is used for leading out the waste gas from which ammonia has been removed from the interior of the treatment tank and discharging the waste gas from which ammonia has been removed from the exhaust end of the exhaust pipe; The spraying mechanism is connected to the treatment tank and is used for performing water spraying operation inside the treatment tank, so as to absorb and eliminate ammonia in the ammonia-containing waste gas entering the interior of the treatment tank.

2. The laboratory ammonia-containing waste gas treatment device according to claim 1, wherein: The treatment tank includes an air inlet hood, a main body shell, and an air outlet hood. Among them, the main body shell is a box member, the air inlet hood and the air outlet hood are respectively conical members, and the air inlet hood and the air outlet hood are respectively arranged on both sides of the main body shell to form the outer shell of the olive-shaped treatment tank; The interior of the main body shell is divided into a spraying and absorption section and a demisting and dehumidifying section, wherein: Baffles are cross-arranged inside the spraying and absorption section to form an S-shaped multi-folded air duct. The folded air duct is also filled with hollow fillers, and a spraying pipe network of the spraying mechanism is also arranged at the top thereof. The spraying pipe network sprays water onto the fillers through its nozzles, so that ammonia contained in the ammonia-containing waste gas passing through the fillers can be dissolved in water and absorbed and eliminated; The demisting and dehumidifying section is located behind the spraying and absorption section, and the demisting and dehumidifying section is filled with hollow balls, so that the waste gas from which ammonia has been removed is dried after passing through the surface of the hollow balls to become dry ammonia-removed waste gas.

3. The laboratory ammonia-containing waste gas treatment device according to claim 2, wherein: A water collecting tank is also arranged at the bottom of the spraying and absorption section and the demisting and dehumidifying section, and the bottom of the water collecting tank is communicated with the spraying mechanism to form a recycling component for the spraying water of the spraying mechanism.

4. The laboratory ammonia-containing waste gas treatment device according to claim 2, wherein: A viewing window is also arranged on the main body shell, and the viewing window is used for observing the working conditions inside the spraying and absorption section or the spraying and absorption section and the demisting and dehumidifying section.

5. The laboratory ammonia-containing waste gas treatment device according to claim 2, wherein: The filler is a Raschig ring made of plastic or ceramic material, and the hollow ball is made of plastic or ceramic material.

6. The laboratory ammonia-containing waste gas treatment device according to claim 2, wherein: The spraying mechanism further includes a water pump, a water tank, and connecting pipe fittings, wherein: The water outlet of the water pump is communicated with a spraying pipe network with nozzles installed in the spraying and absorption section of the treatment tank through the connecting pipe fittings, and the water inlet of the water pump is communicated with the water tank and the bottom of the main body shell through the connecting pipe fittings.

7. The laboratory ammonia-containing waste gas treatment device according to claim 6, wherein: The connecting pipe fittings include a connecting pipe and a first three-way joint, wherein: The water outlet of the water pump is communicated with the spray pipe network arranged inside the treatment tank through the connecting pipe, and the water inlet of the water pump is communicated with the water tank and the bottom of the main body shell respectively through the first three-way joint.

8. The laboratory ammonia-containing waste gas treatment device according to claim 7, characterized in that: It further comprises a first on-off valve, a second on-off valve, a third on-off valve and a second three-way joint, wherein: The first on-off valve is installed at the bottom of the main body shell and is connected with the first three-way joint through the second three-way joint to form the spray water circulation system of the spray mechanism communicated with the water pump; The second on-off valve is installed at the other outlet of the second three-way joint to form the sewage discharge channel of the spray mechanism; The third on-off valve is connected to the other connection port of the water tank and the first three-way joint to form the spray water replenishing system of the spray mechanism communicated with the water pump.

9. The laboratory ammonia-containing waste gas treatment device according to claim 1, wherein: A conical rain shield is provided in a hollow manner at the exhaust end of the exhaust pipe.

10. The laboratory ammonia-containing waste gas treatment device according to claim 1, characterized in that: The air guide pipe, the treatment tank, the induced draft fan, the exhaust pipe, the spray mechanism are connected to each other respectively through flanges, and each component inside the spray mechanism is also connected through flanges.

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