Recovery device for dissipated gas of flow guide cylinder of thickening pool of vulcanization system

Abstract

The utility model relates to a recovery device for dissipated gas of a flow guide cylinder of a thickening pool of a vulcanization system. The recovery device is characterized in that a sealing system is arranged on a flow guide barrel and is used for sealing the connection position of the flow guide barrel and a thickener; a water seal is arranged in the sealing system, so that the sealing effect is further enhanced, and the dissipation of hydrogen sulfide gas is blocked; the water replenishing pipeline is mounted on the sealing system, and a water source is replenished in time when a water seal fails, so that long-term stable operation of the sealing system is ensured; the exhaust pipe is installed on the sealing cover plate and the sealing system and connected with the tail gas draught fan, negative pressure is generated, and generated hydrogen sulfide gas is guided into the tail gas treatment system. According to the scheme provided by the invention, hydrogen sulfide gas at the stirring bearing of the thickener can be limited and sucked through comprehensive application of the sealing system, the suction pipe and the water seal, so that the problem of gas diffusion in the prior art is solved, and the safety of the working environment is improved.

Description

Technical Field

[0001] This application relates to the field of escaping gas recovery technology, and in particular to an escaping gas recovery device for a thickening tank guide tube in a sulfidation system. Background Technology

[0002] In the sulfidation process for treating waste acid, hydrogen sulfide gas serves as the core reaction medium, and the sulfidation thickener, acting as a sedimentation and separation facility, plays a crucial role. However, during actual operation, residual low-concentration toxic and harmful gases often escape from the shaft seal of the thickener's guide tube, causing frequent alarms from the fixed hydrogen sulfide gas detector and forcing the sulfidation system to shut down frequently. Furthermore, the leakage of residual gas into the air poses a safety risk of poisoning to workers. To ensure a safe working environment, effective measures must be taken to control the gas escape from the thickener's guide tube and reduce its impact on production and personnel safety. Utility Model Content

[0003] To address or partially address the problems existing in related technologies, this application provides a gas recovery device for the escaping gas from the thickening tank guide tube of a vulcanization system, aiming to solve the problem of residual toxic and harmful gases often escaping when the shaft seal of the thickening tank guide tube is applied.

[0004] This application provides a device for recovering escaping gas from the thickening tank guide tube of a vulcanization system, comprising:

[0005] Thickener, sealing plate, thickening tank, guide tube, extraction pipe, sealing system, gas detector and water supply pipe;

[0006] The thickener is installed on the thickening tank, the guide tube is installed inside the thickening tank, the thickener passes through the inside of the guide tube, and the cover plate is installed on the thickening tank and the guide tube to seal the thickening tank;

[0007] The sealing system is installed on the guide tank to seal the connection between the guide tank and the thickener;

[0008] The sealing system is equipped with a water seal to further enhance the sealing effect and prevent the escape of hydrogen sulfide gas; a water supply pipe is installed on the sealing system to replenish water in time when the water seal fails, ensuring the long-term stable operation of the sealing system.

[0009] The extraction pipe is installed on the cover plate and sealing system. The extraction pipe is connected to the exhaust fan to generate negative pressure and introduce the generated hydrogen sulfide gas into the exhaust gas treatment system.

[0010] The gas detector is installed on the concentrator above the sealing system.

[0011] Optionally, in some embodiments, the sealing system includes: a sealing box, a magnetostrictive water level sensor, a redox potential monitor, a gas sensor, a reagent dosing device, an adaptive negative pressure regulator, and a controller;

[0012] The sealing box is installed at the stirring bearing of the thickener to seal the connection between the guide tank and the thickener.

[0013] The magnetostrictive water level sensor is installed on the sealed box and connected to the controller to detect the water seal level.

[0014] The redox potential monitor is installed at the bottom of the sealed box to monitor the redox state of the water seal system in real time. The reagent dosing device is installed at the top of the sealed box. An electric valve is installed on the discharge pipe of the reagent dosing device, and the discharge pipe extends into the sealed box. The redox potential monitor and the reagent dosing device are respectively connected to the controller to achieve precise control of the chemical inhibition and conversion process of hydrogen sulfide and ensure the long-term effectiveness of the water seal.

[0015] An adaptive negative pressure regulator is installed on the sealed box, and its output is installed inside the extraction pipe. A gas sensor is installed on the outer wall of the extraction pipe inside the sealed box to monitor the hydrogen sulfide gas concentration in real time. The gas sensor is connected to a controller, which controls the power of the adaptive negative pressure regulator according to the hydrogen sulfide gas concentration to increase the negative pressure of the extraction pipe on the sealed box.

[0016] Optionally, in some implementations, the sealing box is made of corrosion-resistant fiberglass.

[0017] Optionally, in some embodiments, the adaptive negative pressure regulator includes a centrifugal vacuum pump and a frequency converter, which adjusts the power output frequency and voltage according to controller instructions to control the speed and torque of the centrifugal vacuum pump.

[0018] Optionally, in some embodiments, a Venturi effect acceleration section is provided inside the extraction pipe, and a contraction-expansion flow channel is adopted at the inlet of the extraction pipe to increase the gas flow rate and enhance the negative pressure adsorption force.

[0019] The technical solution provided in this application may include the following beneficial effects:

[0020] By comprehensively applying a sealing system, extraction pipe, and water seal, hydrogen sulfide gas at the agitator bearing of the concentrator is restricted and extracted, solving the gas diffusion problem in the existing process, improving the safety of the working environment, and ensuring the health and safety of the operators. The stability of the water seal is effectively guaranteed by the cooperation of the sealing system and the water supply pipe. The sealing system is equipped with a magnetostrictive water level sensor, a redox potential monitor, a gas sensor, a reagent dosing device, and an adaptive negative pressure regulator to precisely control the chemical balance and negative pressure balance within the sealing system, effectively improving the stability of the sealing system.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0023] Figure 1 This is a schematic diagram of the structure of the gas recovery device for the thickening tank guide tube of the vulcanization system shown in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the sealing system structure of the gas recovery device for the thickening tank guide tube of the vulcanization system shown in the embodiments of this application.

[0025] Figure reference numerals: 1-Concentrator, 2-Inlet pipe, 3-Exhaust pipe, 4-Sealing plate, 5-Thickening tank, 6-Sealing system, 601-Sealing box, 602-Magnetostrictive water level sensor, 603-Oxidation-reduction potential monitor, 604-Gas sensor, 605-Reagent dosing device, 606-Adaptive negative pressure regulator, 7-Gas detector, 8-Flow guide bucket, 9-Support beam, 10-Water replenishment pipe. Detailed Implementation

[0026] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0027] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0029] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In the sulfidation process for treating waste acid, hydrogen sulfide gas serves as the core reaction medium, and the sulfidation thickener, acting as a sedimentation and separation facility, plays a crucial role. However, during actual operation, residual low-concentration toxic and harmful gases often escape from the shaft seal of the thickener's guide tube, causing frequent alarms from the fixed hydrogen sulfide gas detector and forcing the sulfidation system to shut down frequently. Furthermore, the leakage of residual gas into the air poses a safety risk of poisoning to workers. To ensure a safe working environment, effective measures must be taken to control the gas escape from the thickener's guide tube and reduce its impact on production and personnel safety.

[0031] To address the aforementioned issues, this application provides a gas recovery device for the guide tube of a thickening tank in a sulfidation system. Through the integrated application of a sealing system, an extraction pipe, and a water seal, it restricts and extracts hydrogen sulfide gas from the agitator bearing of the thickener, solving the gas diffusion problem in existing processes, improving the safety of the working environment, and ensuring the health and safety of operators. The sealing system and water supply pipe work together to effectively ensure the stability of the water seal. The sealing system is equipped with a magnetostrictive water level sensor, a redox potential monitor, a gas sensor, a reagent dosing device, and an adaptive negative pressure regulator to precisely control the chemical and negative pressure balance within the sealing system, effectively improving its stability.

[0032] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure of the gas recovery device for the thickening tank guide tube of the vulcanization system shown in the embodiments of this application.

[0034] See Figure 1 A device for recovering escaping gas from a thickening tank in a vulcanization system, comprising:

[0035] 1. Concentrator; 2. Inlet pipe; 3. Exhaust pipe; 4. Cover plate; 5. Thickening tank; 6. Sealing system; 7. Gas detector; 8. Flow guide; 9. Support beam; 10. Water supply pipe.

[0036] The thickener 1 is mounted on the thickening tank 5 via the support beam 9. The guide barrel 8 is mounted on the main shaft of the thickener 1 inside the thickening tank 5 via the stirring bearing. The main shaft of the thickener 1 passes through the inside of the guide barrel 8. The cover plate 4 is mounted on the thickening tank 5 and the guide barrel 8 to seal the top of the thickening tank 5.

[0037] A sealing system 6 is installed on the guide tank 8 to seal the connection between the guide tank 8 and the thickener 1. The sealing system 6 includes: a sealing box 601, a magnetostrictive water level sensor 602, a redox potential monitor 603, a gas sensor 604, a reagent dosing device 605, an adaptive negative pressure regulator 606, and a controller. The sealing box 601 is made of corrosion-resistant fiberglass and is installed at the stirring bearing of the thickener 1 to seal the connection between the guide tank 8 and the thickener 1. A water seal is installed inside the sealing box 601 to further enhance the sealing effect and prevent the escape of hydrogen sulfide gas. A water supply pipe 10 is installed on the sealing box 601 and is equipped with an electric valve connected to the controller of the sealing system 6. The other end of the water supply pipe 10 is connected to a tap water pipe to replenish water in time when the water seal level drops and is about to fail, ensuring the long-term stable operation of the sealing system 6. A magnetostrictive water level sensor 602 is mounted on a sealed box 601 and connected to a controller. The sensor's detection probe uses an iron-gallium alloy as the waveguide wire. When a pulse current is applied to the excitation coil, a ring-shaped magnetic field is generated, which interacts with the axial magnetic field of the permanent magnet inside the float, inducing a Widmann effect torsional wave. The liquid level is calculated by measuring the time difference between the excitation pulse and the returning torsional wave. The water seal level is detected by the magnetostrictive water level sensor 602 and fed back to the controller. When the water level is lower than the standard level, the electric valve on the water supply pipe 10 is switched on and off to replenish the water seal level.

[0038] The redox potential monitor 603 is installed at the bottom of the sealed box 601. It detects the redox potential in the water seal liquid using a platinum composite electrode, directly reflecting the degree of H2S oxidation in the solution. A higher potential value indicates more complete sulfide oxidation. The reagent dosing device 605 is installed at the top of the sealed box 601. An electric valve is installed on the discharge pipe of the reagent dosing device 605, which extends into the sealed box 601. The redox potential monitor 603 and the reagent dosing device 605 are connected to a controller. When the redox potential is less than the H2S enrichment risk threshold, a slow-release reagent (such as H2O2 or NaClO) is automatically triggered. When the redox potential is greater than 200mV, the amount of slow-release reagent is reduced, achieving precise control of the chemical inhibition and conversion process of hydrogen sulfide and ensuring the long-term effectiveness of the water seal.

[0039] An adaptive negative pressure regulator 606 is mounted on the sealed box 601. The output of the adaptive negative pressure regulator 606 is installed inside the suction pipe 3. The adaptive negative pressure regulator 606 includes a centrifugal vacuum pump and a frequency converter. The frequency converter adjusts the power output frequency and voltage according to the controller's instructions to control the speed and torque of the centrifugal vacuum pump. A gas sensor 604 is mounted on the outer wall of the suction pipe 3 inside the sealed box 601. The gas sensor 604 uses intrinsically conductive polymers such as polypyrrole, polyaniline, or poly(3,4-ethylenedioxythiophene) as its substrate. Its conductivity changes reversibly with the adsorption of H2S molecules. H2S undergoes a redox reaction with the polymer backbone, leading to a change in carrier concentration and a significant change in resistivity. By doping with metal oxides or using molecular imprinting technology, it selectively shields interfering gases such as CO2 and SO2. The gas sensor 604 is connected to the controller. Based on the hydrogen sulfide gas concentration fed back by the gas sensor 604, the controller sends a command to the frequency converter to adjust the power output frequency and voltage, thereby realizing the power control of the centrifugal vacuum pump and increasing the negative pressure of the suction pipe 3 on the sealing box 601.

[0040] The extraction pipe 3 is installed on both sides of the cover plate 4 and on the sealing box 601 of the sealing system 6. A Venturi effect acceleration section is set inside the extraction pipe 3, and a contraction-expansion flow channel is adopted at the inlet of the extraction pipe 3 to increase the gas flow rate and enhance the negative pressure adsorption force of the extraction pipe 3. The extraction pipe 3 is connected to the exhaust gas fan to generate negative pressure and introduce the generated hydrogen sulfide gas into the exhaust gas treatment system.

[0041] Gas detector 7 is installed on concentrator 1 above sealing system 6. When there is a problem with sealing system 6, guide tank 8 or cover plate 4, it detects hydrogen sulfide gas and other toxic gases, shuts down concentrator 1 in time, and issues an alarm to remind staff.

[0042] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A gas recovery device for a thickening tank guide tube in a vulcanization system, comprising a thickener (1), a cover plate (4), a thickening tank (5), and a guide tube (8), wherein the thickener (1) is installed on the thickening tank (5), the guide tube (8) is installed inside the thickening tank (5), the thickener (1) passes through the interior of the guide tube (8), and the cover plate (4) is installed on the thickening tank (5) and the guide tube (8) to seal the thickening tank (5); the gas recovery device for a thickening tank guide tube in a vulcanization system is characterized in that, Also includes: The exhaust pipe (3), sealing system (6), gas detector (7), and water supply pipe (10) are included. The sealing system (6) is installed on the guide barrel (8) to seal the connection between the guide barrel (8) and the concentrator (1); The sealing system (6) is equipped with a water seal to further enhance the sealing effect and prevent the escape of hydrogen sulfide gas; the water supply pipe (10) is installed on the sealing system (6) to replenish the water source in time when the water seal fails, so as to ensure the long-term stable operation of the sealing system (6); The extraction pipe (3) is installed on the cover plate (4) and the sealing system (6). The extraction pipe (3) is connected to the exhaust gas fan to generate negative pressure and introduce the generated hydrogen sulfide gas into the exhaust gas treatment system. The gas detector (7) is installed on the concentrator (1) above the sealing system (6).

2. The gas recovery device for the thickening tank guide tube of the vulcanization system according to claim 1, characterized in that, The sealing system (6) includes: The components include a sealed box (601), a magnetostrictive water level sensor (602), a redox potential monitor (603), a gas sensor (604), a reagent dosing device (605), an adaptive negative pressure regulator (606), and a controller. The sealing box (601) is installed at the stirring bearing of the thickener (1) to seal the connection between the guide barrel (8) and the thickener (1); The magnetostrictive water level sensor (602) is installed on the sealed box (601) and is connected to the controller to detect the water seal level. The redox potential monitor (603) is installed at the bottom of the sealed box (601) to monitor the redox state of the water seal system in real time. The reagent dosing device (605) is installed at the top of the sealed box (601). An electric valve is installed on the discharge pipe of the reagent dosing device (605), and the discharge pipe extends into the sealed box (601). The redox potential monitor (603) and the reagent dosing device (605) are respectively connected to the controller to achieve precise control of the chemical inhibition and conversion process of hydrogen sulfide and ensure the long-term effectiveness of the water seal. The adaptive negative pressure regulator (606) is installed on the sealed box (601), and the output end of the adaptive negative pressure regulator (606) is installed inside the suction pipe (3). The gas sensor (604) is installed on the outer wall of the suction pipe (3) inside the sealed box (601) to monitor the concentration of hydrogen sulfide gas in real time. The gas sensor (604) is connected to the controller and controls the power of the adaptive negative pressure regulator (606) according to the concentration of hydrogen sulfide gas to increase the negative pressure of the suction pipe (3) on the sealed box (601).

3. The gas recovery device for the thickening tank guide tube of the vulcanization system according to claim 2, characterized in that: The sealed box (601) is made of corrosion-resistant fiberglass.

4. The gas recovery device for the thickening tank guide tube of the vulcanization system according to claim 2, characterized in that: The adaptive negative pressure regulator (606) includes a centrifugal vacuum pump and a frequency converter. The frequency converter adjusts the power output frequency and voltage according to the instructions of the controller to control the speed and torque of the centrifugal vacuum pump.

5. The gas recovery device for the thickening tank guide tube of the vulcanization system according to claim 1 or 2, characterized in that: The gas extraction pipe (3) is equipped with a Venturi effect acceleration section, and a contraction-expansion flow channel is adopted at the inlet of the gas extraction pipe (3) to increase the gas flow rate and enhance the negative pressure adsorption force.

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