Gas phase heavy metal generation and adsorption experimental apparatus

Abstract

This application proposes a gas phase heavy metal generation and adsorption experimental device, including a gas phase heavy metal generator (1) and a generation and heating unit (4). The generation and heating unit (4) is used to heat the heavy metal solid source in the gas phase heavy metal generator (1). The gas phase heavy metal generator (1) includes multiple generation containers (11) and multiple generation sieves (12). Each generation container (11) is provided with at least one generation sieve (12). The generation sieve (12) is used to place the heavy metal solid source. The generation container (11) is provided with multiple sets of generation sieve support parts (111). The distance between the multiple sets of generation sieve support parts (111) and the heating part of the generation and heating unit (4) is different. The generation sieve (12) is supported on the generation sieve support parts (111). The multiple generation containers (11) are connected.

Description

Technical Field

[0001] This application belongs to the field of pollutant analysis experiments, and specifically relates to experimental equipment for gas-phase heavy metal adsorption. Background Technology

[0002] Due to the complex composition and wide distribution of raw materials, industrial flue gas emissions, in addition to NO... x In addition to conventional pollutants such as sulfur dioxide and sulfur dioxide, it also releases heavy metals such as mercury, arsenic, selenium, and thallium, posing a great threat to human health and the natural environment.

[0003] Taking coal-fired flue gas as an example, statistics show that the concentration of mercury in coal-fired flue gas is generally 1 to 20 μg / m³. 3 The average arsenic content in coal is 3.28 μg / kg. In 2020, coal-fired power plants emitted approximately 9.67 to 11.59 tons of arsenic into the atmosphere, accounting for about 9.31% of total arsenic emissions. Besides coal-fired power plants, various heavy metals are also present in the flue gas from industries such as cement and steel, with thallium being particularly prevalent in the flue gas from cement kilns.

[0004] Adsorption technology is currently an important means of controlling heavy metal emissions from industrial flue gas. Its main principle is to immobilize heavy metals in the flue gas on the surface of an adsorbent through physical / chemical adsorption, effectively preventing their migration into the natural environment via fly ash, atmospheric gels, etc. Adsorbent technology has advantages such as high heavy metal removal efficiency and good economic efficiency; its capture of mercury, arsenic, and other heavy metals has been industrially validated.

[0005] CN207231874U discloses a gaseous arsenic compound generation-fixation combined device, which generates gaseous arsenic compounds by heating, and then carries them through an adsorption bed via a carrier gas to capture gaseous arsenic.

[0006] CN101980013A discloses an adsorbent activity detection system, which uses a mercury permeation tube and a constant temperature water bath as mercury generation units to simulate coal-fired flue gas containing gaseous mercury, uses an adsorption reactor as a reaction unit, and uses a mercury analyzer as a detection unit.

[0007] However, the above technical solutions only target a single type of heavy metal and do not involve the synergistic capture of multiple heavy metals. Summary of the Invention

[0008] This application aims to propose a gas-phase heavy metal adsorption experimental device to achieve the synergistic capture of multiple heavy metals.

[0009] The embodiments of this application propose a gas-phase heavy metal adsorption experimental apparatus, including a gas-phase heavy metal generator and a heating unit, wherein the heating unit is used to heat the heavy metal solid source within the gas-phase heavy metal generator.

[0010] The gas phase heavy metal generator includes multiple generating containers and multiple generating sieves. Each generating container is provided with at least one generating sieve, which is used to place a heavy metal solid phase source. Each generating container is provided with multiple sets of generating sieve support parts. The distance between the multiple sets of generating sieve support parts and the heating part of the generating heating unit is different. The generating sieve is supported on the generating sieve support parts. The multiple generating containers are connected to each other.

[0011] In at least one possible implementation, the gaseous heavy metal generator further includes a mixing tube.

[0012] The plurality of generating containers are respectively connected to the mixing tube and thus communicate with it, or the plurality of generating containers are connected to the mixing tube after being communicated with it.

[0013] In at least one possible implementation, the gaseous heavy metal generator includes a mixing tube connected to the generating container, the mixing tube being entirely disposed within the generating heating unit.

[0014] In at least one possible implementation, the gas-phase heavy metal adsorption experimental apparatus further includes an adsorption unit connected downstream of the gas-phase heavy metal generator.

[0015] The adsorption unit includes an adsorption tube and multiple adsorption sieves. The adsorption sieves are detachably connected to the adsorption tube and are used to hold the adsorbent.

[0016] In at least one possible implementation, the gaseous heavy metal generator includes a mixing tube, and the mixing tube and the adsorption unit are connected via a frosted interface.

[0017] In at least one possible embodiment, the gas-phase heavy metal generation adsorption experimental apparatus further includes an adsorption heating unit, the adsorption heating unit surrounding the adsorption unit, the adsorption unit being disposed above the gas-phase heavy metal generator, and the adsorption heating unit being disposed above the generation heating unit.

[0018] In at least one possible implementation, the generating container is a cylindrical tube, and the inner wall of the generating container is provided with a plurality of generating sieve plate support portions arranged in a vertical direction. The generating sieve plate support portions include a plurality of protrusions protruding radially inward from the inner wall of the generating container. The plurality of protrusions are spaced apart in the circumferential direction of the generating container. The outer peripheral edge of the generating sieve plate is provided with a plurality of notches. The plurality of notches are spaced apart in the circumferential direction of the generating container. The angle between the plurality of notches is the same as the angle between the plurality of protrusions.

[0019] In at least one possible implementation, the multiple sets of generating sieve plate supports are staggered in the circumferential direction of the generating container, and when viewed along the axial direction of the generating container, the different sets of generating sieve plate supports will not obstruct each other.

[0020] In at least one possible implementation, the generating container is provided with a conversion connector for connecting a carrier gas source. The conversion connector is located at the upper end of the generating container, and the lower ends of the plurality of generating containers are interconnected. The carrier gas flows from top to bottom within the generating container.

[0021] In at least one possible implementation, the heating unit is a sand bath, and the gaseous heavy metal generator is placed inside the sand bath.

[0022] The gas phase heavy metal adsorption experimental device also includes a tail gas treatment unit, which is connected downstream of the adsorption unit.

[0023] By adopting the above technical solution, multiple heavy metal solid sources can be heated at different temperatures through multiple generating containers provided in the gas phase heavy metal generator, thereby generating multiple gas phase heavy metals and providing conditions for the synergistic processing of multiple gas phase heavy metals. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a gas-phase heavy metal adsorption experimental apparatus according to an embodiment of this application is shown.

[0025] Figure 2 A cross-sectional view of the generating vessel of a gas-phase heavy metal generation and adsorption experimental apparatus according to an embodiment of this application is shown.

[0026] Figure 3 A schematic diagram of the generating sieve plate of a gas-phase heavy metal generating adsorption experimental apparatus according to an embodiment of this application is shown.

[0027] Figure 4 A cross-sectional view of the adsorption tube of a gas-phase heavy metal generation adsorption experimental apparatus according to an embodiment of this application is shown.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. Gas-phase heavy metal generator

[0030] 11 Generating Container 11A First Generating Container 11B Second Generating Container 111 Generating Screen Plate Support 112 Conversion Joint T-Protrusion

[0031] 12 screen plate 121 notch

[0032] 13 Mixing tube 131 Frosted interface

[0033] 14. Reaction Gas Inlet Section

[0034] 2 Adsorption unit 21 Adsorption tube body 211 Adsorption sieve plate support 22 Adsorption sieve plate

[0035] 3. Exhaust gas treatment unit 31 First exhaust gas absorption bottle 32 Second exhaust gas absorption bottle

[0036] 4 heating units

[0037] 5 adsorption heating units 51 temperature control module Detailed Implementation

[0038] To more clearly illustrate the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail in conjunction with the accompanying drawings in this section. Besides the embodiments described in this section, this application can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application should be determined by the claims.

[0039] like Figures 1 to 4 As shown, the embodiments of this application propose a gas-phase heavy metal generation and adsorption experimental apparatus, which includes a gas-phase heavy metal generator 1, an adsorption unit 2, a tail gas treatment unit 3, a generation heating unit 4, and an adsorption heating unit 5. The adsorption unit 2 can be connected downstream of the gas-phase heavy metal generator 1.

[0040] like Figure 1 As shown, the heating unit 4 can heat the gaseous heavy metal generator 1. The heating unit 4 can be a sand bath, and the gaseous heavy metal generator 1 can be placed in the sand bath. The sand bath can use sand as a heat transfer medium (heating section) to heat the heavy metal solid phase source in the gaseous heavy metal generator 1. The heating temperature of the sand bath can reach 300 to 700 degrees Celsius.

[0041] The adsorption heating unit 5 heats the adsorption unit 2. The adsorption heating unit 5 can be an electric heating furnace, which can surround and enclose the adsorption unit 2. The electric heating furnace can be connected to a temperature control module 51, thereby facilitating the adjustment of the heating temperature of the electric heating furnace.

[0042] The adsorption unit 2 can be located above the gas phase heavy metal generator 1, thus avoiding the condensation of gas phase heavy metals caused by connecting the two with pipelines. The adsorption heating unit 5 can be placed directly above the heating unit 4, so that the gas phase heavy metal adsorption experimental equipment can operate at high temperature.

[0043] The gas phase heavy metal generator 1 may include multiple generating containers 11, generating sieve plates 12, mixing tubes 13, and reaction gas inlet sections 14.

[0044] Multiple generating containers 11 can contain various heavy metal solid-phase sources, thereby generating various gaseous heavy metals. A generating sieve plate 12 is detachably connected to the generating containers 11 and is used to hold the heavy metal solid-phase sources. The lower ends of the multiple generating containers 11 can be interconnected, for example, a mixing pipe 13 is connected to the generating containers 11, and a reaction gas inlet 14 can be connected to the mixing pipe 13. The generating containers 11 can be individually connected to the mixing pipe 13, or multiple generating containers 11 can be connected together and then connected to the mixing pipe 13. The generating containers 11 and the mixing pipe 13 can be cylindrical tubes. The multiple generating containers 11, the mixing pipe 13, and the reaction gas inlet 14 can be integrally formed (e.g., integrally formed glass containers), or they can be assembled and connected together by multiple containers and pipes.

[0045] In this embodiment, the gaseous heavy metal generator 1 may include two generating containers 11, namely a first generating container 11A and a second generating container 11B. The lower ends of the first generating container 11A and the second generating container 11B may be connected to each other.

[0046] The inner wall of the generating container 11 may be provided with multiple sets of generating screen plate supports 111 arranged vertically, and the multiple sets of generating screen plate supports 111 may be located on different horizontal planes. By selectively placing the generating screen plate 12 on different sets of generating screen plate supports 111, the height of the generating screen plate 12 can be adjusted. Each set of generating screen plate supports 111 may include multiple (e.g., two) protrusions T, which may protrude radially inward from the inner wall of the generating container 11, and the multiple protrusions T may be spaced apart circumferentially in the generating container 11. It is understood that each generating container 11 may be provided with one generating screen plate 12 or multiple generating screen plates 12, and the multiple generating screen plates 12 may be located on different horizontal planes.

[0047] like Figure 2 As shown, multiple sets of generating sieve plate supports 111 can be staggered circumferentially around the generating container 11. When viewed along the axial direction of the generating container 11, different sets of generating sieve plate supports 111 will not obstruct each other. For example, three sets of generating sieve plate supports 111 can be provided, and each set of generating sieve plate supports 111 can include two protrusions T. When viewed in cross-section, the protrusions T of these three sets of generating sieve plate supports 111 are located at the 1 o'clock and 7 o'clock positions, the 3 o'clock and 9 o'clock positions, and the 5 o'clock and 11 o'clock positions, respectively.

[0048] It is understandable that the multiple sets of generating screen plate support parts 111 may not be offset in the circumferential direction of the generating container 11, which can still support the generating screen plate 12 and realize the height adjustment of the generating screen plate 12.

[0049] like Figure 3As shown, the generating sieve plate 12 can be generally disc-shaped. Multiple notches 121 can be provided on the outer periphery of the generating sieve plate 12. The angle between the multiple notches 121 can be the same as the angle between the multiple protrusions T of each set of generating sieve plate support parts 111. For example, the multiple notches 121 can be spaced 180 degrees apart, and the multiple protrusions T of each set of generating sieve plate support parts 111 can be spaced 180 degrees apart. Thus, when the notches 121 and protrusions T are not aligned, the generating sieve plate support parts 111 can support the generating sieve plate 12, allowing the generating sieve plate 12 to be placed on the generating sieve plate support parts 111. When the notches 121 and protrusions T are aligned, the generating sieve plate 12 can pass through this set of generating sieve plate support parts 111. By selectively placing the generating sieve plate 12 in one set of multiple sets of generating sieve plate support parts 111, the height of the generating sieve plate 12 can be selected, thereby adjusting the distance between the generating sieve plate 12 and the generating heating unit 4.

[0050] The generating sieve plate 12 can be a quartz sieve plate. The generating sieve plate 12 is used to place the heavy metal solid phase source. The quartz sieve plate allows gas to pass through and blocks solids.

[0051] By placing the generating sieve plate 12 at different positions on the generating sieve plate support 111, different heating positions can be provided for the heavy metal solid phase source, thereby obtaining different heating temperatures. It can be understood that the heating part of the generating heating unit 4 can be located at the lower part of the generating container 11. The greater the distance between the generating sieve plate 12 and the heating part of the generating heating unit 4, the lower the heating temperature of the heavy metal solid phase source placed on the generating sieve plate 12; that is, the higher the position of the generating sieve plate 12, the lower the heating temperature of the heavy metal solid phase source placed on it.

[0052] Reference Figure 1 The generating sieve plate 12 in the first generating container 11A is located in the uppermost of the three sets of generating sieve plate supports 111, while the generating sieve plate 12 in the second generating container 11B is located in the middle of the three sets of generating sieve plate supports 111. Thus, although both generating containers 11 are heated by the same generating heating unit 4, the two heavy metal solid phase sources on the two generating sieve plates 12 can be heated at different temperatures due to the different distances between the two generating sieve plates 12 and the generating heating unit 4. Sublimation of different heavy metal solid phase sources can be achieved by coupling and adjusting the position of the generating sieve plate 12 and the heating temperature of the generating heating unit 4.

[0053] The generating container 11 may be equipped with a conversion connector 112 for connecting a carrier gas source, which may be nitrogen. The conversion connector 112 may be located at the upper end of the generating container 11. The lower ends of multiple generating containers 11 are interconnected, and the lower end of the mixing pipe 13 may be connected to the lower end of the second generating container 11B. The first generating container 11A, the second generating container 11B, and the mixing pipe 13 may form an inverted m-shape. Within the generating container 11, the carrier gas can flow from top to bottom, carrying gaseous heavy metals generated by the heavy metal solid phase source through the generating sieve plate 12, and carrying various gaseous heavy metals for mixing in the mixing pipe 13. In the mixing pipe 13, the carrier gas can flow from bottom to top.

[0054] The mixing tube 13 can be completely installed in the heating unit 4, thereby preventing the gas from condensing in the mixing tube 13.

[0055] The reactant gas can be introduced into the mixing pipe 13 through the reactant gas inlet 14, and the reactant gas can be used to react with the gaseous heavy metals carried by the carrier gas. The mixing pipe 13 may be provided with a frosted interface 131.

[0056] Adjusting the carrier gas flow rate allows for the directional and controllable generation of gaseous heavy metal concentrations; a higher carrier gas flow rate results in lower gaseous heavy metal concentrations. The gaseous heavy metals can then be fully mixed with the reactant gas before entering adsorption unit 2.

[0057] The adsorption unit 2 may include an adsorption tube body 21 and multiple adsorption sieve plates 22, the adsorption sieve plates 22 being detachably connected to the adsorption tube body 21. The adsorption tube body 21 is provided with a frosted interface, through which the adsorption tube body 21 and the mixing tube 13 can be connected. This allows the adsorption tube body 21 and the mixing tube 13 to be directly connected without the need for additional piping, thereby reducing or avoiding the condensation of high-temperature gas.

[0058] The inner wall of the adsorption tube 21 can be provided with multiple sets of adsorption sieve plate supports 211 arranged vertically, and these supports 211 can be located at different horizontal planes. By placing multiple adsorption sieve plates 22 on different sets of supports 211, the multiple adsorption sieve plates 22 can be positioned at different heights within the adsorption tube 21. This provides different adsorption positions for different types of gaseous heavy metals. By placing the optimal adsorbent for different gaseous heavy metals on the adsorption sieve plates 22 at different positions, efficient synergistic removal of multiple gaseous heavy metals can be achieved.

[0059] The number of adsorption sieve plate support portions 211 and the number of adsorption sieve plates 22 can be the same as the number of generating containers 11. In this embodiment, two sets of adsorption sieve plate support portions 211 can be provided, and two adsorption sieve plates 22 can be provided. Each set of adsorption sieve plate support portions 211 can include multiple (e.g., two) protrusions T, which can protrude radially inward from the inner wall of the adsorption tube body 21.

[0060] The adsorption sieve plate 22 and the generating sieve plate 12 have the same overall structure, so they will not be described again. When the notch of the adsorption sieve plate 22 and the adsorption sieve plate support portion 211 are not aligned, the adsorption sieve plate support portion 211 can still support the adsorption sieve plate 22, allowing the adsorption sieve plate 22 to rest on the adsorption sieve plate support portion 211. When the notch of the adsorption sieve plate 22 and the adsorption sieve plate support portion 211 are aligned, the adsorption sieve plate 22 can pass through this set of adsorption sieve plate support portions 211.

[0061] The exhaust gas treatment unit 3 can be connected to the downstream side of the adsorption tube 21. The exhaust gas treatment unit 3 may include one or more exhaust gas absorption bottles, which are used to hold absorbent liquid. The absorbent liquid can be one or more of potassium permanganate solution, nitric acid, hydrogen peroxide, and sulfuric acid. These absorbent liquids can directly absorb gaseous heavy metals and also have strong oxidizing properties, which can convert highly toxic low-valence heavy metals into less toxic high-valence heavy metals.

[0062] In this embodiment, the exhaust gas treatment unit 3 may include a first exhaust gas absorption bottle 31 and a second exhaust gas absorption bottle 32, with the second exhaust gas absorption bottle 32 connected downstream of the first exhaust gas absorption bottle 31. The first exhaust gas absorption bottle 31 may contain a potassium permanganate (KMnO4) solution, and the second exhaust gas absorption bottle 32 may contain a mixed solution of nitric acid (HNO3) and hydrogen peroxide (H2O2).

[0063] The exhaust gas treatment unit 3 can capture and absorb unadsorbed gaseous heavy metals, which not only avoids their release into the atmosphere and causes harm, but also reduces experimental errors by measuring the heavy metal content in the absorption liquid and comparing it with the consumption of the heavy metal solid source and the adsorption amount of the adsorbent.

[0064] The following describes the working process of using the gas-phase heavy metal adsorption experimental equipment.

[0065] S1: Securely fix the gaseous heavy metal generator 1 to the generating and heating unit 4. Connect the gaseous heavy metal generator 1 and the adsorption unit 2 through the frosted interface. Cover the adsorption heating unit 5 on the outside of the adsorption unit 2. Set the temperatures of the generating and heating unit 4 and the adsorption heating unit 5 according to the experiment, and denot them as t1 and t2, respectively, in degrees Celsius.

[0066] S2: Weigh out the iron-manganese composite oxide (Fe-Mn) and manganese-titanium composite oxide (Mn / TiO2) required for the experiment as adsorbents, and spread the two adsorbents evenly on the two adsorption sieve plates 22 respectively.

[0067] S3: Weigh out the arsenic trioxide (As2O3) powder and thallium chloride (TlCl) powder required for the experiment, respectively, as the heavy metal solid phase sources of gaseous arsenic and gaseous thallium, and spread them evenly on the two generating sieve plates 12.

[0068] S4: Prepare a 4% potassium permanganate (KMnO4) solution and pour 100 mL into the first tail gas absorption bottle 31. Prepare a mixed solution of 5% nitric acid (HNO3) and 10% hydrogen peroxide (H2O2) and pour 100 mL into the second tail gas absorption bottle 32. Connect the first tail gas absorption bottle 31 and the second tail gas absorption bottle 32 with a flexible tube.

[0069] S5: After the temperature of the heating unit 4 reaches t1 and the temperature of the adsorption heating unit 5 reaches t2 and remains stable, since the sublimation temperature of thallium chloride (TlCl) is higher than that of arsenic trioxide (As2O3), the generating sieve plate 12 containing thallium chloride (TlCl) is placed in the lower generating sieve plate support part 111 of the generating container 11, and the generating sieve plate 12 containing arsenic trioxide (As2O3) is placed in the higher generating sieve plate support part 111 of another generating container 11. The adsorption sieve plate 22 containing iron-manganese composite oxide (Fe-Mn) is placed in the higher adsorption sieve plate support part 211, and the adsorption sieve plate 22 containing manganese-titanium composite oxide (Mn / TiO2) is placed in the lower adsorption sieve plate support part 211.

[0070] S6: Introduce carrier gas through adapter 112 and control the flow rate of the carrier gas to simulate industrial flue gas, start various gaseous heavy metal generation-adsorption experiments and start timing.

[0071] S7: When the required reaction time is reached, first turn off the generating heating unit 4, then turn off the adsorption heating unit 5, and keep the carrier gas at a high temperature for purging for, for example, 15 minutes. Then take out the generating sieve plate 12 and the adsorption sieve plate 22. By analyzing the consumption of the heavy metal solid phase source and the heavy metal content on the surface of the adsorbent, we can understand the synergistic removal performance of gas phase heavy metals.

[0072] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0073] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.

[0074] In this application, unless otherwise expressly stated or limited, terms such as "installation," "assembly," "connection," "linking," "joining," "linking," "abutment," "communication," "connection," "conduction," "fixing," and "fastening" should be interpreted broadly, for example, they can be direct or indirect. For instance, regarding connection, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly stated or limited. For instance, regarding communication / conduction, it can be direct communication / conduction or indirect communication / conduction through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] In this application, unless otherwise expressly stated or limited, a component being disposed / installed / located / enclosed / placed within, inside, or incorporated in another component can be either of the following two situations: a portion or a majority of the one component is located within the other component; or the one component is completely enclosed within the other component.

[0076] Although the present application has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described herein. The present application can be modified and implemented as alternative embodiments without departing from the spirit and scope of the present application as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present application.

Claims

1. A gas-phase heavy metal adsorption experimental apparatus, characterized in that, It includes a gas-phase heavy metal generator (1) and a heating unit (4), wherein the heating unit (4) is used to heat the heavy metal solid source inside the gas-phase heavy metal generator (1). The gas phase heavy metal generator (1) includes multiple generating containers (11) and multiple generating sieves (12). Each generating container (11) is provided with at least one generating sieve (12). The generating sieve (12) is used to place a heavy metal solid phase source. The generating container (11) is provided with multiple sets of generating sieve support parts (111). The distance between the multiple sets of generating sieve support parts (111) and the heating part of the generating heating unit (4) is different. The generating sieve (12) is supported on the generating sieve support parts (111). The multiple generating containers (11) are connected.

2. The gas-phase heavy metal adsorption experimental apparatus according to claim 1, characterized in that, The gas phase heavy metal generator (1) also includes a mixing tube (13). The plurality of generating containers (11) are respectively connected to the mixing tube (13) and thus communicate with each other, or the plurality of generating containers (11) are connected to the mixing tube (13) after being communicated with each other.

3. The gas-phase heavy metal adsorption experimental apparatus according to claim 1, characterized in that, The gas phase heavy metal generator (1) includes a mixing tube (13), which is connected to the generating container (11) and is completely disposed in the generating heating unit (4).

4. The gas-phase heavy metal adsorption experimental apparatus according to claim 1, characterized in that, The gas-phase heavy metal adsorption experimental device further includes an adsorption unit (2), which is connected to the downstream side of the gas-phase heavy metal generator (1). The adsorption unit (2) includes an adsorption tube (21) and a plurality of adsorption sieves (22). The adsorption sieves (22) are detachably connected to the adsorption tube (21) and are used to place the adsorbent.

5. The gas-phase heavy metal adsorption experimental apparatus according to claim 4, characterized in that, The gas phase heavy metal generator (1) includes a mixing tube (13), and the mixing tube (13) and the adsorption unit (2) are connected through a frosted interface.

6. The gas-phase heavy metal adsorption experimental apparatus according to claim 5, characterized in that, The gas phase heavy metal generation adsorption experimental device further includes an adsorption heating unit (5), which surrounds the adsorption unit (2). The adsorption unit (2) is located above the gas phase heavy metal generator (1), and the adsorption heating unit (5) is located above the generation heating unit (4).

7. The gas-phase heavy metal adsorption experimental apparatus according to claim 1, characterized in that, The generating container (11) is a cylindrical tube. The inner wall of the generating container (11) is provided with multiple sets of generating sieve plate support parts (111) arranged in a vertical direction. The generating sieve plate support part (111) includes multiple protrusions that protrude radially inward from the inner wall of the generating container (11). The multiple protrusions are spaced apart in the circumferential direction of the generating container (11). The outer peripheral edge of the generating sieve plate (12) is provided with multiple notches (121). The multiple notches (121) are spaced apart in the circumferential direction of the generating container (11). The angle between the multiple notches (121) is the same as the angle between the multiple protrusions.

8. The gas-phase heavy metal adsorption experimental apparatus according to claim 7, characterized in that, The multiple sets of generating sieve plate supports (111) are staggered in the circumferential direction of the generating container (11). When viewed along the axial direction of the generating container (11), the different sets of generating sieve plate supports (111) will not block each other.

9. The gas-phase heavy metal adsorption experimental apparatus according to claim 1, characterized in that, The generating container (11) is provided with a conversion connector (112) for connecting a carrier gas source. The conversion connector (112) is located at the upper end of the generating container (11). The lower ends of the plurality of generating containers (11) are connected to each other. The carrier gas flows from top to bottom in the generating container (11).

10. The gas-phase heavy metal adsorption experimental apparatus according to claim 4, characterized in that, The heating unit (4) is a sand bath, and the gaseous heavy metal generator (1) is placed in the sand bath. The gas phase heavy metal adsorption experimental device also includes a tail gas treatment unit (3), which is connected to the downstream side of the adsorption unit (2).

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