Gas-liquid mixing system and vulcanization reaction apparatus

Abstract

This application relates to the field of chemical equipment technology and discloses a gas-liquid mixing system and a sulfidation reaction device. The gas-liquid mixing system includes: a first pipeline assembly, which is equipped with a Venturi gas-liquid mixer. The first pipeline assembly has multiple sets of first pipe sections, each set of first pipe sections being equipped with a Venturi gas-liquid mixer, and the multiple sets of first pipe sections are arranged in parallel; and a second pipeline assembly, which is connected to the first pipeline assembly and is used to supply gaseous media to the multiple sets of first pipe sections respectively. In the flow path of the media in the first pipeline assembly, the connection and cooperation position between the second pipeline assembly and the first pipeline assembly is located on the inlet side of the Venturi gas-liquid mixer, and the Venturi gas-liquid mixer can form a negative pressure on the exhaust side of the pipeline assembly. This allows the gaseous media to be fully and efficiently mixed with the liquid media, and the gas-liquid mixing system can be safely and stably operated continuously without interrupting production by switching the connection to the first pipe sections.

Description

Technical Field

[0001] This application relates to the field of chemical equipment technology, and in particular to a gas-liquid mixing system and a sulfidation reaction device. Background Technology

[0002] In chemical production processes, hazardous gases such as hydrogen, methane, or hydrogen sulfide are often used as reactants to participate in chemical reactions, and these reactions often produce precipitates. For example, the non-ferrous metal smelting process generates large amounts of flue gas containing sulfur dioxide and sulfur trioxide, and the process of producing acid from this flue gas produces a large amount of waste acid.

[0003] Currently, sulfidation reaction equipment used in chemical production can treat waste acid through a sulfidation process to remove elements such as arsenic and heavy metals. In this process, hydrogen sulfide is typically used as the sulfiding agent, and gaseous hydrogen sulfide, as a reactant, needs to be added precisely until the desired reaction endpoint is reached.

[0004] In related technologies, hydrogen sulfide gas is typically stored in a storage tank and transported to the reactor via a pressure difference between the tank and pipelines. This necessitates a high pressure at the storage tank, typically 0.1 MPa-0.3 MPa. Since hydrogen sulfide is a highly toxic and flammable gas, this high-pressure storage poses significant safety risks at the storage tank. Furthermore, the small contact area between the hydrogen sulfide gas and the waste acid after being added to the reactor results in low reaction efficiency. The precipitates generated during the sulfidation reaction can easily clog pipelines, causing production disruptions. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a gas-liquid mixing system that exhibits high operational reliability and stability, and contributes to improving the safety of vulcanization reaction equipment during operation.

[0006] Another objective of this application is to provide a vulcanization reaction apparatus.

[0007] According to a first aspect embodiment of the present application, a gas-liquid mixing system is used to mix a gaseous medium with a liquid medium to form a mixture, wherein a chemical reaction can occur in the mixture. The gas-liquid mixing system includes: a first pipeline assembly, which is arranged in a ring and equipped with a Venturi gas-liquid mixer, and is used for unidirectional flow of the medium. The first pipeline assembly has multiple sets of first pipe sections, each set of first pipe sections is equipped with a Venturi gas-liquid mixer, and the multiple sets of first pipe sections are arranged in parallel; a second pipeline assembly, which is connected to the first pipeline assembly and is used to supply the gaseous medium to the multiple sets of first pipe sections respectively. In the flow path of the medium in the first pipeline assembly, the connection and cooperation position between the second pipeline assembly and the first pipeline assembly is located on the inlet side of the Venturi gas-liquid mixer, and the Venturi gas-liquid mixer is adapted to form a negative pressure on the exhaust side of the pipeline assembly; and a reactor body, which is connected to the first pipeline assembly and can supply the liquid medium to the first pipeline assembly. The reactor body can also receive the mixture discharged through the first pipeline assembly.

[0008] According to the gas-liquid mixing system of this application embodiment, the Venturi gas-liquid mixer can form a negative pressure downstream of the area where the second pipeline assembly and the first pipeline assembly are connected, so as to extract the gas medium in the second pipeline assembly through the negative pressure, so that the gas medium entering the Venturi gas-liquid mixer can be fully mixed with the liquid medium, thereby improving the reaction efficiency of the gas medium and the liquid medium. Furthermore, under the action of the negative pressure, the liquid medium in the first pipeline assembly will not enter the second pipeline assembly, avoiding the reaction of the liquid medium with the gas medium in the second pipeline assembly to produce easily deposited sulfide slag, etc., which helps to improve the operational reliability and stability of the gas mixing system.

[0009] Furthermore, the first pipeline assembly is provided with multiple sets of first pipe sections, so that one set of first pipe sections can be selectively connected to the gas-liquid mixing system and connected with the second pipeline assembly according to the gas-liquid mixing requirements. This enables rapid switching of pipelines without interrupting production, ensuring that the gas-liquid mixing system can operate safely and stably continuously.

[0010] Meanwhile, since the Venturi gas-liquid mixer has the function of extracting gas medium from the second pipeline assembly, it can reduce the gas pressure on the side of the gas medium storage container (such as a gas storage device), which helps to improve the storage safety of the gas medium. Furthermore, it eliminates the need to install pressurization equipment (such as a pump structure) on the side of the second pipeline assembly to achieve gas medium transportation, which helps to simplify the construction of the gas-liquid mixing system and reduce the manufacturing cost of the sulfidation reaction equipment.

[0011] According to some embodiments of this application, the first pipeline assembly further includes: a second pipe section, the second pipe section being connected between the liquid outlet side of the first pipe section and the first interface of the reactor body; and a third pipe section, the third pipe section being connected between the liquid inlet side of the first pipe section and the second interface of the reactor body.

[0012] According to some embodiments of this application, the second pipeline assembly includes: a pipeline body section, the inlet side of which is used to supply the gas medium; and a gas supply pipe section, the inlet side of which is connected to the exhaust side of the pipeline body section, and the exhaust side of which is connected and cooperates with the first pipe section.

[0013] According to some embodiments of this application, the first pipe section is arranged horizontally, and the gas supply pipe section is arranged vertically; and / or, the extension direction of the first pipe section intersects the extension direction of the gas supply pipe section.

[0014] According to some embodiments of this application, the second pipeline assembly is provided with multiple gas supply pipe segments, which are respectively connected and cooperate with the main pipeline segment, and each gas supply pipe segment is connected to a group of the first pipe segments.

[0015] According to some embodiments of this application, the first pipe section is provided with a first switch, which is used to control the connection state between the liquid outlet side of the first pipe section and the second pipe section; the first pipe section is provided with a second switch, which is used to control the connection state between the liquid inlet side of the first pipe section and the third pipe section; the gas supply pipe section is provided with a third switch, which is used to control the connection state between the gas supply pipe section and the first pipe section.

[0016] According to some embodiments of this application, the second pipeline assembly further includes: a regulating valve, which is disposed in the main body section of the pipeline and is used to regulate the flow rate of the gas medium in the main body section of the pipeline; and a pressure detection element, which is disposed in the main body section of the pipeline and is used to detect the gas pressure in the main body section of the pipeline.

[0017] According to some embodiments of this application, the gas-liquid mixing system further includes: a pump body disposed in the third pipe section and used to pump the liquid medium in the third pipe section to the first pipe section.

[0018] According to some embodiments of this application, the gas-liquid mixing system further includes: a redox reaction detection element, which is disposed in the second pipe section and used to detect the redox state of the mixture in the second pipe section.

[0019] The vulcanization reaction apparatus according to the second aspect of this application includes the gas-liquid mixing system described above.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a gas-liquid mixing system according to an embodiment of this application.

[0022] Figure label: Gas-liquid mixing system 100; First pipeline assembly 1; First pipe section 11; Second pipe section 12; Third pipe section 13; First switch 141; Second switch 142; Pump body 15; Redox reaction detection element 16; Second pipeline assembly 2; main pipeline section 21; gas supply pipeline section 22; third switch 23; regulating valve 24; pressure detection element 25; Reactor body 3; First interface 31; Second interface 32; Venturi gas-liquid mixer 4; first section 41; second section 42. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] The following is for reference. Figure 1 The gas-liquid mixing system 100 according to an embodiment of this application is described. The gas-liquid mixing system 100 can be applied to a vulcanization reaction device to achieve mixing of liquid and gaseous media in the vulcanization reaction device.

[0025] It should be noted that hazardous gases such as hydrogen, methane, or hydrogen sulfide are frequently used as reactants in chemical production processes, and these reactions often produce precipitates. For example, non-ferrous metal smelting processes generate large amounts of flue gas containing sulfur dioxide and sulfur trioxide, and the process of producing acid from this flue gas produces a large amount of waste acid. Currently, sulfidation reaction equipment used in chemical production can treat this waste acid using a sulfidation process to remove elements such as arsenic and heavy metals. In this sulfidation process, hydrogen sulfide is typically used as the sulfiding agent, and gaseous hydrogen sulfide, as a reactant, needs to be added precisely until the desired reaction endpoint is reached.

[0026] In related technologies, hydrogen sulfide gas is typically stored in a storage tank and transported to the reactor via the pressure difference between the storage tank and the pipeline. This necessitates a high pressure at the storage tank, typically 0.1 MPa-0.3 MPa. Since hydrogen sulfide is a highly toxic and flammable gas, the high-pressure storage condition poses significant safety risks at the storage tank. Furthermore, the small contact area between the hydrogen sulfide gas and the waste acid (liquid) after being added to the reactor results in low reaction efficiency. Simultaneously, when the required amount of hydrogen sulfide for the sulfidation reaction equipment is small, the static pressure on the waste acid (liquid) side can enter the gas transmission pipeline for chemical reaction, and the resulting precipitates (such as sulfide slag) can easily accumulate in the pipeline, causing blockages.

[0027] According to an embodiment of this application, a gas-liquid mixing system 100 is used to mix a gaseous medium with a liquid medium to form a mixture, in which a chemical reaction can occur.

[0028] It is understood that the gaseous medium can be the aforementioned hydrogen sulfide gas, the liquid medium can be the aforementioned waste acid liquid, and the mixture is a mixture of hydrogen sulfide gas and waste acid liquid, thereby achieving the removal of arsenic and heavy metal elements from the waste acid liquid.

[0029] Reference Figure 1 As shown, the gas-liquid mixing system 100 includes: a first pipeline assembly 1, a second pipeline assembly 2, and a reactor body 3.

[0030] The first pipeline assembly 1 is arranged in a ring shape and is equipped with a Venturi gas-liquid mixer 4. The first pipeline assembly 1 is provided with multiple sets of first pipe sections 11, each set of first pipe sections 11 is equipped with the aforementioned Venturi gas-liquid mixer 4, and the multiple sets of first pipe sections 11 are arranged in parallel. The first pipeline assembly 1 is used to allow unidirectional flow of the medium. The "medium" can be the aforementioned liquid medium, or a mixture of liquid medium and gas medium, etc.

[0031] It should be noted that multiple sets of first pipe sections 11 are provided in the gas-liquid mixing system 100, and each set of first pipe sections 11 is provided with a Venturi gas-liquid mixer 4, so that each set of first pipe sections 11 can form a negative pressure on the downstream side of the area connected to the second pipeline assembly 2, thereby realizing the extraction of gas medium in the second pipeline assembly 2.

[0032] Furthermore, the second pipeline assembly 2 is connected to the first pipe segment 11 in the first pipeline assembly 1, and the second pipeline assembly 2 is used to supply a gaseous medium (such as the aforementioned hydrogen sulfide gas) to one side of the first pipeline assembly 1. It is understood that the second pipeline assembly 2 can be connected to a gaseous medium storage device (such as a gas storage tank), so that the gaseous medium in the gas storage device can be transported to the first pipeline assembly 1 through the second pipeline assembly 2.

[0033] In the flow path of the medium in the first pipeline assembly 1, the connection and cooperation position between the second pipeline assembly 2 and the first pipe section 11 is located on the inlet side of the Venturi gas-liquid mixer 4, and the Venturi gas-liquid mixer 4 can form a negative pressure on the exhaust side of the second pipeline assembly 2. Thus, by generating an adsorption force at the Venturi gas-liquid mixer 4, the gas medium in the second pipeline assembly 2 can be pumped to the first pipeline assembly 1, thereby realizing the mixing and chemical reaction of the gas medium and the liquid medium at the Venturi gas-liquid mixer 4 to remove arsenic and heavy metal elements from the liquid medium.

[0034] It should be noted that the Venturi gas-liquid mixer 4 is used to supply liquid medium, and when the liquid medium flows through the Venturi gas-liquid mixer 4, it can form a Venturi effect, thereby forming a negative pressure on the downstream side of the connection position between the first pipeline assembly 1 and the second pipeline assembly 2, and drawing the gas medium in the second pipeline assembly 2 to the Venturi gas-liquid mixer 4 through the negative pressure.

[0035] The "Venturi effect" refers to the phenomenon where the flow velocity increases and the static pressure decreases when a fluid (gas or liquid) flows through a narrowing throat in a pipe. Furthermore, the terms "upstream" and "downstream" in this application refer to the flow path of the medium within the first pipeline assembly 1. In other words, the cross-sectional dimensions of the flow path through which the liquid medium flows in the Venturi gas-liquid mixer 4 change; for example, a portion of the flow path in the Venturi gas-liquid mixer 4 is gradually narrowed downstream, causing the Venturi effect to occur when the fluid flows through the Venturi gas-liquid mixer 4.

[0036] Therefore, there is no need for a high pressure on the gas storage device side connected to the second pipeline assembly 2, which helps to improve the storage safety of the gas medium on the gas storage device side, and the gas medium can be fully mixed with the liquid medium at the Venturi gas-liquid mixer 4, which helps to improve the reaction efficiency.

[0037] Reference Figure 1 As shown, the reactor body 3 is connected to the first pipeline assembly 1, and the reactor body 3 can supply liquid medium to the first pipeline assembly 1. The reactor body 3 can also receive the mixed liquid discharged through the first pipeline assembly 1.

[0038] It should be noted that the gas-liquid mixing system 100 in this application is applied in a sulfidation reaction device. The sulfidation reaction device may be equipped with a supply device for supplying liquid medium (such as waste acid liquid) to one side of the reactor body 3. The reactor body 3 can be connected to the supply device through a third interface (not shown in the figure), and the liquid medium can be further transported to the first pipeline assembly 1 through the reactor body 3. A recovery device may also be provided in the sulfidation reaction device. The recovery device can be used to receive the liquid medium discharged from the reactor body 3. That is, the reactor body 3 can be connected to the recovery device through a fourth interface (not shown in the figure), and the waste acid solution (i.e., the solution after reacting with hydrogen sulfide) after treatment can be recovered through the recovery device.

[0039] like Figure 1 As shown in a specific embodiment of this application, the first pipeline assembly 1 is provided with two sets of first pipe sections 11, and a Venturi gas-liquid mixer 4 is respectively provided on each of the two sets of first pipe sections 11. The second pipeline assembly 2 is connected to the two sets of first pipe sections 11. When the liquid medium flows through the first pipe section 11, the Venturi gas-liquid mixer 4 generates a negative pressure downstream of the connection point between the first pipe section 11 and the second pipeline assembly 2, so as to draw the gas medium in the second pipeline assembly 2 into the first pipe section 11, thereby achieving full mixing of the gas medium and the liquid medium at the Venturi gas-liquid mixer 4.

[0040] It is understood that the number of first pipe segments 11 in the first pipeline assembly 1 can be two, three, four, etc., and no specific limitation is made here. Among them, when the first pipeline assembly 1 in the gas-liquid mixing system 100 is provided with multiple sets of first pipe segments 11, only one set of first pipe segments 11 can be connected to extract the gas medium at the corresponding second pipeline assembly 2 through one set of first pipe segments 11, thereby helping to improve the operational stability and reliability of the gas-liquid mixing system 100.

[0041] Taking the first pipeline assembly 1 as an example, where two sets of first pipe sections 11 are provided, when the gas-liquid mixing system 100 is running, one set of the two sets of first pipe sections 11 is connected to the system (i.e., the gas medium and liquid medium are mixed only through one set of first pipe sections 11), while the other set of the two sets of first pipe sections 11 is not connected to the system (i.e., the liquid medium in the first pipeline assembly 1 will not flow in that set of first pipe sections 11). In other words, the gas-liquid mixing function can be achieved by connecting only one set of first pipe sections 11 to the gas-liquid mixing system 100, which meets the gas-liquid mixing requirements of the vulcanization reaction equipment. The other set of first pipe sections 11 can be used as a backup to improve the fault tolerance of the gas-liquid mixing system 100, thereby ensuring the operational stability and reliability of the gas-liquid mixing system 100.

[0042] Furthermore, if the first pipe section 11 connected to the gas-liquid mixing system 100 experiences blockages or other problems, the flow of liquid medium in the first pipe section 11 will be obstructed, preventing the Venturi gas-liquid mixer 4 in the first pipe section 11 from generating sufficient suction to extract the gas medium on the side of the second pipeline assembly 2. In this case, the first pipe section 11 can be disconnected (i.e., the supply of liquid medium to the first pipe section 11 can be stopped, and the first pipe section 11 can be disconnected from the second pipeline assembly 2), and another first pipe section 11 in the disconnected state can be connected, allowing the liquid medium to flow through the first pipe section 11. When the liquid medium flows through the first pipe section 11, the Venturi gas-liquid mixer 4 in the first pipe section 11 can also generate negative pressure downstream of its connection point with the second pipeline assembly 2, thereby extracting the gas medium in the second pipeline assembly 2 to the Venturi gas-liquid mixer 4 for gas-liquid mixing. At the same time, under this operating condition, maintenance personnel can promptly repair the first pipe section 11 that is blocked without affecting the gas-liquid mixing efficiency of the gas-liquid mixing system 100. In other words, the first pipe section 11 that is blocked can be repaired while the gas-liquid mixing system 100 is performing gas-liquid mixing normally, which helps to improve the operational reliability of the gas-liquid mixing system 100.

[0043] According to the gas-liquid mixing system 100 of this application embodiment, the Venturi gas-liquid mixer 4 can form a negative pressure downstream of the area where the second pipeline assembly 2 and the first pipeline assembly 1 are connected, so as to extract the gas medium in the second pipeline assembly 2 through the negative pressure, so that the gas medium entering the Venturi gas-liquid mixer 4 can be fully mixed with the liquid medium, thereby improving the reaction efficiency of the gas medium and the liquid medium. Furthermore, under the action of the negative pressure, the liquid medium in the first pipeline assembly 1 will not enter the second pipeline assembly 2, avoiding the reaction of the liquid medium with the gas medium in the second pipeline assembly 2 to produce easily deposited sulfide slag, etc., which helps to improve the operational reliability and stability of the gas mixing system.

[0044] Reference Figure 1 As shown, the first pipeline assembly 1 is provided with multiple sets of first pipe sections 11 arranged in parallel, and each set of first pipe sections 11 can form a negative pressure on the downstream side of its communication area with the second pipeline assembly 2 through the Venturi gas-liquid mixer 4 to extract the gas medium. The arrangement of multiple sets of first pipe sections 11 can improve the fault tolerance of the gas-liquid mixing system 100. Even if one set of first pipe sections 11 in the multiple sets is blocked, the normal operation of the gas-liquid mixing system 100 can be ensured by connecting other sets of first pipe sections 11 that have not failed. Thus, the pipeline (i.e. the connection state of the first pipe section 11) can be quickly switched without stopping production, so as to ensure that the gas-liquid mixing system 100 can operate safely and stably continuously.

[0045] Meanwhile, since the Venturi gas-liquid mixer 4 has the function of extracting gas medium from the second pipeline assembly 2, it can reduce the gas pressure on the side of the gas medium storage container (e.g., maintaining it at 0.01MPa-0.02MPa) to avoid excessive gas pressure, which helps to improve the storage safety of the gas medium. Furthermore, it eliminates the need to install a pressurization device (e.g., a pump structure) on the side of the second pipeline assembly 2 to achieve gas medium transportation, which helps to simplify the construction of the gas-liquid mixing system 100 and reduce the manufacturing cost of the vulcanization reaction equipment.

[0046] Reference Figure 1 As shown, in some embodiments of this application, the first pipeline assembly 1 includes: a first pipe segment 11, a second pipe segment 12, and a third pipe segment 13.

[0047] The first pipe section 11 is connected to the second pipe assembly 2, and the aforementioned Venturi gas-liquid mixer 4 is installed in the first pipe section 11. The second pipe section 12 connects the liquid outlet side of the first pipe section 11 and the first interface 31 of the reactor body 3, allowing the mixed liquid discharged from the first pipe section 11 to flow into the reactor body 3 through the second pipe section 12 and be further transported through the reactor body 3. The third pipe section 13 connects the liquid inlet side of the first pipe section 11 and the second interface 32 of the reactor body 3, allowing the liquid medium in the reactor body 3 to be transported to the first pipe section 11 through the third pipe section 13. Thus, the flow path of the liquid medium in the first pipe assembly 1 is: reactor body 3 → third pipe section 13 → first pipe section 11 (passing through the second pipe assembly 2 and the Venturi gas-liquid mixer 4) → second pipe section 12 → reactor body 3.

[0048] like Figure 1 As shown, in a further embodiment of this application, the second pipeline assembly 2 includes: a pipeline body section 21 and a gas supply section 22. The gas inlet side of the pipeline body section 21 is used to supply gas medium to flow in, that is, the gas inlet side of the pipeline body section 21 is used to communicate with the gas storage device (i.e., the device for storing gas medium).

[0049] Furthermore, the air inlet side of the gas supply pipe section 22 is connected to the exhaust side of the main pipe section 21, and the exhaust side of the gas supply pipe section 22 is connected and cooperated with the first pipe section 11, so that the gas medium in the main pipe section 21 can flow into the first pipe section 11 through the gas supply pipe section 22, so as to supply the gas medium to one side of the first pipe assembly 1.

[0050] In some embodiments of this application, both the first pipe segment 11 and the gas supply pipe segment 22 extend in a straight line, and the extension direction of the first pipe segment 11 intersects with the extension direction of the gas supply pipe segment 22, thereby ensuring that the first pipe segment 11 and the gas supply pipe segment 22 can be connected, reducing the difficulty of connecting and coordinating the first pipe segment 11 and the gas supply pipe segment 22.

[0051] Reference Figure 1 As shown, in some embodiments of this application, the first pipe section 11 is arranged horizontally, and the gas supply pipe section 22 is arranged vertically, with the gas supply pipe section 22 connected above the first pipe section 11. This allows the liquid medium to flow horizontally through the first pipe section 11, thereby helping to improve the flow stability of the liquid medium at the first pipe section 11. Furthermore, the gas supply pipe section 22 is vertically connected above the first pipe section 11, positioning it in an area suitable for avoiding other components in the first piping assembly 1 (such as the second pipe section 12, the third pipe section 13, etc.).

[0052] It is understandable that, since the gas supply pipe section 22 is located above the first pipe section 11, even if some of the liquid medium flowing through the first pipe section 11 reacts with the gas medium at the connection between the first pipe section 11 and the air pipe section, the sulfide slag generated by the reaction can move further downstream (e.g., to the side of the second pipe section 12) under the action of the liquid medium, thus avoiding the sulfide slag from being retained and deposited in the gas supply pipe section 22. This ensures the reliability and stability of the gas supply pipe section 22 in delivering the gas medium to the side of the first pipe section 11.

[0053] like Figure 1 As shown, in some embodiments of this application, the first pipeline assembly 1 is provided with two sets of first pipe sections 11. The two sets of first pipe sections 11 are connected in parallel between the liquid inlet side of the second pipe section 12 and the liquid inlet side of the third pipe section 13, so that two parallel branches can be formed between the second pipe section 12 and the third pipe section 13. Thus, the liquid medium in the third pipe section 13 can be supplied to the two sets of first pipe sections 11 respectively, and the mixed liquid in the two sets of first pipe sections 11 can also flow into the reactor body 3 through the second pipe section 12 respectively.

[0054] Furthermore, the second pipeline assembly 2 is provided with two gas supply pipe sections 22, which are respectively connected to the main pipeline section 21. The gas medium in the main pipeline section 21 can flow into the two gas supply pipe sections 22 respectively, and each gas supply pipe section 22 is connected to a set of first pipe sections 11, so that the gas medium can be supplied to the corresponding set of first pipe sections 11 through one gas supply pipe section 22.

[0055] This results in the gas-liquid mixing system 100 having two sets of gas-liquid mixing structures (i.e., two sets of connected and cooperating gas supply pipe sections 22 and the first pipe section 11). The two sets of gas-liquid mixing structures can work independently, thereby improving the operational reliability and fault tolerance of the gas-liquid mixing system 100.

[0056] It should be noted that during the treatment of waste acid by sulfidation, the amount of hydrogen sulfide required varies greatly due to the large fluctuations in the arsenic and heavy metal content of the waste acid, and the reaction process can generate precipitates that can easily clog pipelines.

[0057] In the gas-liquid mixing system 100 of this application, gas-liquid mixing (i.e., mixing of gaseous and liquid media) can be carried out through one of the two sets of gas supply pipe sections 22 and the first pipe section 11. In other words, even if sediment accumulates in one of the two sets of gas supply pipe sections 22 and the first pipe section 11, causing pipeline blockage, gas-liquid mixing can still be carried out through the other set of gas supply pipe sections 22 and the first pipe section 11, ensuring that the gas-liquid mixing system 100 can operate continuously, which helps to improve the operational reliability and stability of the vulcanization reaction equipment.

[0058] like Figure 1 As shown, in some embodiments of this application, the first pipe section 11 is provided with a first switch 141, which is used to control the connection between the liquid outlet side of the first pipe section 11 and the second pipe section 12; the first pipe section 11 is provided with a second switch 142, which is used to control the connection between the liquid inlet side of the first pipe section 11 and the third pipe section 13; the gas supply pipe section 22 is provided with a third switch 23, which is used to control the connection between the gas supply pipe section 22 and the first pipe section 11. The aforementioned switch structures (i.e., the first switch 141, the second switch 142, and the third switch 23) can all be constructed as valve structures.

[0059] Therefore, each set of connected pipe sections 11 and 22 is equipped with a set of first switches 141, second switches 142 and third switches 23. Thus, according to the gas-liquid mixing requirements of the gas-liquid mixing system 100, one set of the first switches 141, second switches 142 and third switches 23 can be selectively opened and the other set closed, so as to connect the first pipe section 11 and the gas supply pipe section 22 between the third pipe section 13 and the second pipe section 12, thereby realizing the gas-liquid mixing function of the gas-liquid mixing system 100.

[0060] like Figure 1 As shown, in some embodiments of this application, the second pipeline assembly 2 further includes a pressure detection element 25. The pressure detection element 25 is disposed in the main pipeline section 21, and the pressure detection element 25 can be used to detect the gas pressure in the main pipeline section 21. This allows the operator (or the main equipment) to determine the blockage status at the Venturi gas-liquid mixer 4 based on the detection data of the pressure detection element 25. This facilitates switching between the first pipeline section 11 connected to the second pipeline section 12 and the third pipeline section 13 and the gas supply pipeline section 22 by switching the opening and closing state of the switching structure, thereby ensuring the operational reliability and stability of the gas-liquid mixing system 100. The pressure detection element 25 can be configured as a pressure sensor.

[0061] like Figure 1As shown, in some embodiments of this application, the gas-liquid mixing system 100 further includes a pump body 15, which is disposed in the third pipe section 13 and is used to pump the liquid medium in the third pipe section 13 to the first pipe section 11 to realize the function of conveying the liquid medium in the first pipeline assembly 1.

[0062] like Figure 1 As shown, in some embodiments of this application, the second pipeline assembly 2 further includes a regulating valve 24, which is disposed in the main pipeline section 21 and is used to regulate the flow rate of the gas medium in the main pipeline section 21 to regulate the amount of gas medium delivered to the first pipeline section 11.

[0063] It is understandable that by setting the regulating valve 24 at the main line (i.e., the main pipeline section 21 mentioned above), the overall gas medium flow rate in the second pipeline assembly 2 can be adjusted by the regulating valve 24. There is no need to set valve structures at the two branches (i.e., the two gas supply pipe sections 22 mentioned above) to adjust the gas medium flow rate delivered to the first pipe section 11 side, which can reduce the number of components set in the gas-liquid mixing system 100.

[0064] like Figure 1 As shown in a further embodiment of this application, the gas-liquid mixing system 100 further includes a redox reaction detector 16. The redox reaction detector 16 is disposed on the second pipe section 12 (i.e., located downstream of the first pipe section 11), and is used to detect the redox state of the mixture in the second pipe section 12. Based on the detection result of the redox reaction detector 16, the regulating valve 24 can be controlled to achieve precise addition of the gas medium. For example, when it is necessary to increase the input amount of the gas medium, the opening of the regulating valve 24 can be increased to accelerate the supply of the gas medium to the first pipe section 11; when it is necessary to decrease the input amount of the gas medium, the opening of the regulating valve 24 can be decreased to slow down the supply of the gas medium to the first pipe section 11.

[0065] The redox reaction detection element 16 is configured as a redox potential detector (e.g., an ORP meter) to measure the redox potential (ORP) to assess the redox state of the substance (i.e., the mixture in the second section 12).

[0066] Meanwhile, the redox reaction detection element 16 is electrically connected to the regulating valve 24 to control the opening of the regulating valve 24 based on the detection data of the redox reaction detection element 16, thereby achieving precise addition of the gas medium.

[0067] like Figure 1As shown, in some embodiments of this application, the Venturi gas-liquid mixer 4 includes a first section 41 and a second section 42. The first end is connected to the second section 42, and the liquid inlet side of the first section 41 is connected to the downstream side of the connection position between the first pipeline assembly 1 and the second pipeline assembly 2. Moreover, a flow path with a gradually narrowing flow cross section is formed in the first section 41, so that the flow velocity of the liquid medium increases when it flows through the first section 41, thereby forming a negative pressure near the connection area between the first pipeline assembly 1 and the second pipeline assembly 2, so as to draw the gas medium in the second pipeline assembly 2 into the Venturi gas-liquid mixer 4.

[0068] Furthermore, the second section 42 is connected to the liquid outlet side of the first section 41, and the flow cross section of the flow path in the second section 42 is set as a constant cross section or gradually expanding shape to ensure that the gas medium and the liquid medium can fully contact each other at the Venturi gas-liquid mixer 4, thereby improving the efficiency of the chemical reaction between the gas medium and the liquid medium.

[0069] The gas-liquid mixing device according to the embodiments of this application has at least the following advantages over the prior art: (1) It can reduce the gas pressure of the gas storage device (i.e. the container for storing gas medium), avoid the gas pressure on the gas outlet side being too high and thus pose a safety hazard, so that the gas medium can maintain a low gas pressure storage condition, and can achieve precise addition of the gas medium and complete the gas-liquid efficient mixing reaction to improve the reaction efficiency. (2) The pressure detection device 25 enables real-time detection of pipeline blockage, so as to achieve rapid switching of pipeline without interrupting production, thereby ensuring that the gas-liquid mixing system 100 can operate safely and stably continuously.

[0070] The sulfidation reaction apparatus according to the embodiments of this application includes the gas-liquid mixing system 100 described above, for mixing a gaseous medium (e.g., hydrogen sulfide gas) with a liquid medium (e.g., waste acid solution) through the gas-liquid mixing system 100.

[0071] The advantages of the vulcanization reaction equipment compared to existing technologies are the same as those of the gas-liquid mixing system 100 mentioned above, and will not be repeated here.

[0072] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0073] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0074] In the description of this application, "multiple" means two or more.

[0075] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0076] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas-liquid mixing system, characterized in that, The gas-liquid mixing system is used to mix a gaseous medium with a liquid medium to form a mixture, in which a chemical reaction can occur. The gas-liquid mixing system includes: The first pipeline assembly (1) is arranged in a ring and is provided with a Venturi gas-liquid mixer (4). The first pipeline assembly (1) is used to allow unidirectional flow of the medium. The first pipeline assembly (1) is provided with multiple sets of first pipe sections (11). Each set of first pipe sections (11) is provided with a Venturi gas-liquid mixer (4). The multiple sets of first pipe sections (11) are arranged in parallel. The second pipeline assembly (2) is connected to the first pipe section (11) and is used to supply the gas medium to multiple sets of the first pipe sections (11) respectively. In the flow path of the medium in the first pipeline assembly (1), the connection and cooperation position of the second pipeline assembly (2) and the first pipe section (11) is located on the inlet side of the Venturi gas-liquid mixer (4), and the Venturi gas-liquid mixer (4) is adapted to form a negative pressure on the exhaust side of the pipeline assembly. The reactor body (3) is connected to the first pipeline assembly (1) and can supply the liquid medium to the first pipeline assembly (1). The reactor body (3) can also receive the mixture discharged through the first pipeline assembly (1).

2. The gas-liquid mixing system according to claim 1, characterized in that, The first piping assembly (1) further includes: The second pipe section (12) is connected between the liquid outlet side of the first pipe section (11) and the first interface (31) of the reactor body (3); The third pipe section (13) is connected between the liquid inlet side of the first pipe section (11) and the second interface (32) of the reactor body (3).

3. The gas-liquid mixing system according to claim 2, characterized in that, The second piping assembly (2) includes: The main body of the pipeline (21) is used for the gas medium to flow in; The gas supply pipe section (22) is connected to the exhaust side of the main pipe section (21) and the exhaust side of the gas supply pipe section (22) is connected to the first pipe section (11).

4. The gas-liquid mixing system according to claim 3, characterized in that, The first pipe section (11) is arranged horizontally, and the gas supply pipe section (22) is arranged vertically and connected above the first pipe section (11).

5. The gas-liquid mixing system according to claim 3, characterized in that, The second pipeline assembly (2) is provided with multiple gas supply pipe sections (22), which are connected to the main pipeline section (21) respectively, and each gas supply pipe section (22) is connected to a group of the first pipeline section (11).

6. The gas-liquid mixing system according to any one of claims 3-5, characterized in that, The first pipe section (11) is provided with a first switch (141), which is used to control the connection state between the liquid outlet side of the first pipe section (11) and the second pipe section (12); The first pipe section (11) is provided with a second switch (142), which is used to control the connection state between the liquid inlet side of the first pipe section (11) and the third pipe section (13); The gas supply pipe section (22) is equipped with a third switch (23), which is used to control the connection state between the gas supply pipe section (22) and the first pipe section (11).

7. The gas-liquid mixing system according to claim 3, characterized in that, The second piping assembly (2) further includes: A regulating valve (24) is provided in the main section of the pipeline (21) and is used to regulate the flow rate of the gas medium in the main section of the pipeline (21); Pressure detection element (25) is provided on the main body section (21) of the pipeline and is used to detect the air pressure in the main body section (21).

8. The gas-liquid mixing system according to claim 7, characterized in that, The gas-liquid mixing system further includes a redox reaction detector (16), which is located in the second pipe section (12) and is used to detect the redox state of the mixture in the second pipe section (12).

9. The gas-liquid mixing system according to claim 2, characterized in that, The gas-liquid mixing system further includes: Pump body (15) is provided in the third pipe section (13) and is used to pump the liquid medium in the third pipe section (13) to the first pipe section (11).

10. A vulcanization reaction apparatus, characterized in that, Includes the gas-liquid mixing system according to any one of claims 1-9.

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