Direct injection total sulfur analyzer with pre-treatment structure

Abstract

The application discloses a direct injection type total sulfur analyzer with a pretreatment structure and relates to the technical field of total sulfur analyzer pretreatment, comprising a sulfur detection box and a side-hung control box, wherein a flow direction adjusting pipeline is arranged in the side-hung control box, gas guide pipes are symmetrically connected to the bottom of the flow direction adjusting pipeline, the gas guide pipes penetrate through the side-hung control box and are fixedly connected with through pipes, and the through pipes are connected with the sulfur detection box. Through the design of the double-circuit parallel flow direction adjusting pipeline, the non-stop maintenance function is realized, the laser scattering sensor and the intelligent control system are combined, the air flow path and the processing strategy can be automatically adjusted according to the real-time monitored impurity data, the problems of difficult maintenance, poor adaptability and low intelligent degree in the prior art are solved, the detection efficiency and reliability of the total sulfur analyzer are significantly improved, and the total sulfur analyzer is particularly suitable for long-term continuous monitoring tasks in complex industrial environments.

Description

Technical Field

[0001] This invention relates to the field of pretreatment technology for total sulfur analyzers, specifically to a direct-entry total sulfur analyzer with a pretreatment structure. Background Technology

[0002] Total sulfur analyzers are key equipment used in petrochemical, environmental monitoring and other fields to determine the total sulfur content in samples. Their core principle usually includes two major steps: sample combustion conversion and sulfide detection. Depending on the detection principle, they are mainly divided into ultraviolet fluorescence method, coulometric method and pulsed ultraviolet fluorescence spectroscopy. The sample is burned under high temperature and oxygen-rich conditions, so that all sulfides are converted into sulfur dioxide, and then the total sulfur content is determined by the corresponding detection method.

[0003] In total sulfur analysis, sample pretreatment is a crucial step to ensure analytical accuracy. Inadequate pretreatment can lead to a series of problems, including detector contamination, pipeline blockage, and deviations in analytical results. Traditional pretreatment methods mainly include steps such as filtration, drying, cooling, and depressurization to remove interfering components such as particulate matter and moisture. However, the pretreatment system of a total sulfur analyzer usually requires downtime for filter replacement and component maintenance, which seriously affects the continuity and efficiency of the detection work. Especially in long-term continuous monitoring applications, downtime caused by regular maintenance can significantly reduce equipment availability. At the same time, when the impurity content in the sample fluctuates greatly, the pretreatment strategy cannot be intelligently adjusted. The fixed pretreatment process cannot optimize the processing path in real time according to the sample quality, resulting in insufficient processing under high impurity conditions, affecting detection accuracy, or over-processing under low impurity conditions, reducing efficiency.

[0004] Therefore, we propose a direct-feed total sulfur analyzer with a pretreatment structure. Summary of the Invention

[0005] The purpose of this invention is to provide a direct-entry total sulfur analyzer with a pretreatment structure, thereby solving the problems mentioned in the background art;

[0006] To achieve the above objectives, the present invention provides the following technical solution: a direct-entry total sulfur analyzer with a pretreatment structure, comprising a sulfur detection box and a side-mounted control box, wherein a flow direction regulating pipe is installed inside the side-mounted control box, and gas guide pipes are symmetrically connected to both sides of the bottom of the flow direction regulating pipe, and the gas guide pipes pass through the side-mounted control box and are connected to and fixed with a connecting pipe.

[0007] The flow direction regulating pipe and the guide pipe are also connected to a central guide pipe, which has an air inlet. A collection pipe is evenly installed at the bottom of the guide pipe, and one end of the collection pipe passes through the sulfur detection box and is connected to the sulfur detector installed inside the sulfur detection box.

[0008] The flow direction regulating pipe is symmetrically installed with filter elements, and the inner wall of the flow direction regulating pipe on the filter element side is equipped with a valve. A rotating shaft is installed on the valve to drive the valve to rotate and complete the sealing of the flow direction regulating pipe on the corresponding side. A sealing plug is slidably connected to the inner wall of the central pipe.

[0009] Furthermore, a gear is fitted on the top side of the rotating shaft at the top of the flow direction regulating pipe, and a sleeve is fitted and fixed on the flow direction regulating pipe. A helical gear sleeve is movably connected to the top of the sleeve through a bearing, and the two sides of the helical gear sleeve are respectively meshed with the gear on the rotating shaft.

[0010] Furthermore, a speed transmission assembly is installed inside the side-mounted control box, which includes a servo motor and a gearbox housed within the box.

[0011] Furthermore, a rotating column is installed at the bottom of the speed-changing component, and rotating weight columns are evenly and movably connected to the outer wall of the rotating column. A lifting sleeve is slidably sleeved on the rotating column and located at the bottom of the rotating weight column. The rotating rod at the top of the lifting sleeve is movably connected to the corresponding rotating weight column, and a locking rod is evenly fixed at the bottom of the lifting sleeve.

[0012] Furthermore, a rotating sleeve is movably connected inside the side-mounted control box and located in the rotating tooth sleeve. A friction block is uniformly slidably connected on the rotating sleeve. One side of the locking rod is correspondingly engaged with the protrusion on the side wall of the friction block. A lead screw is installed on the rotating sleeve, and one end of the lead screw is movably connected to the rotating column.

[0013] Furthermore, one end of the lead screw passes through the flow direction regulating pipe and the sealing plug respectively and is movably connected to the inner wall of the guide pipe. A locking sleeve is fitted on the rotating shaft set outside the side-mounted control box to restrict the rotation of the rotating shaft.

[0014] The pretreatment method for the total sulfur analyzer is as follows:

[0015] The sample enters a high-temperature heating furnace and burns at 1100℃, where sulfides are converted into sulfur dioxide and hydrocarbons are converted into water vapor and carbon dioxide. After cooling, the sample is introduced into the air inlet of the central air inlet through a pipeline.

[0016] The sample gas enters one side of the flow regulating pipe, the valve on the other side of the pipe is closed, and after being filtered by the filter element, it enters the guide pipe and finally enters the membrane permeate drying gas along the collection pipe. After removing water vapor, it is then subjected to sulfur detection treatment.

[0017] A laser scattering sensor installed on the inlet side monitors impurities in the sample gas. A monitoring period is set. If the impurity value does not exceed the set threshold during the corresponding period, the speed-changing component drives the rotating column to rotate at high speed. During the rotation, the rotating column completes the lifting sleeve, causing the clamping rod to drive the friction block inside the rotating sleeve to move inward. The friction block contacts the top side wall of the lead screw, clamping the lead screw to rotate synchronously. The rotation of the lead screw drives the sealing plug inside the central through-pipe to move upward, causing the subsequently discharged sample gas to be directly discharged into the sulfur detection chamber through the through-pipe.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, by setting up a dual-path parallel flow direction adjustment pipeline and a symmetrically installed filter element and valve structure, the automatic switching of the sample gas path and the online replacement of the filter element are realized. When the filter element on one side needs to be replaced, the system can automatically close the valve on that side and open the passage on the other side, ensuring that the detection process is not interrupted, significantly improving the continuous operation efficiency and maintenance convenience of the equipment, and is suitable for high-frequency and long-term industrial detection scenarios.

[0020] 2. In this invention, by integrating a laser scattering sensor with a mechanical linkage control system, the impurity content in the sample gas can be monitored in real time, and the airflow path and filtration strategy can be automatically adjusted according to a preset threshold. When the impurity content is low, the system can bypass some pretreatment steps and directly introduce the sample gas into the detection unit to improve the detection speed. In the case of high impurities, the full-process filtration is activated to ensure the accuracy and reliability of the detection results, which reflects the organic combination of intelligent pretreatment and high-precision detection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the housing structure of the direct-entry total sulfur analyzer with pretreatment structure of the present invention;

[0022] Figure 2 This is a side view of the direct-entry total sulfur analyzer with pretreatment structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the installation structure of the side-mounted control box for the sulfur detection box of the present invention;

[0024] Figure 4 This is a schematic diagram showing the connection between the flow direction adjustment pipe inside the side-mounted control box and the central control pipe of the present invention;

[0025] Figure 5 This is a schematic diagram of the filter element inside the flow direction regulating pipe and the corresponding valve installation direction of the present invention;

[0026] Figure 6 This is a schematic diagram of the inner sleeve mounting structure of the spiral tooth sleeve of the present invention.

[0027] In the diagram: 1. Sulfur detection box; 2. Side-mounted control box; 3. Speed ​​change assembly; 4. Flow direction adjustment pipe; 5. Sleeve; 6. Rotary gear sleeve; 7. Rotating shaft; 8. Valve; 9. Filter element; 10. Guide pipe; 11. Manifold; 12. Rotary column; 13. Rotary weight column; 14. Lifting sleeve; 15. Lead screw; 16. Central through pipe; 17. Sealing plug; 18. Rotary sleeve; 19. Friction block; 20. Locking rod; 21. Air inlet. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1-6 The present invention provides a technical solution:

[0030] Example 1: The online ultraviolet fluorescence total sulfur analysis device burns the sample gas under high temperature and oxygen-rich conditions, converting all sulfides into sulfur dioxide. At the same time, sulfur dioxide will produce fluorescence under specific ultraviolet light irradiation. The total sulfur content can be accurately calculated by measuring the fluorescence intensity.

[0031] The sample gas enters a high-temperature heating furnace, where hydrocarbons are converted into water vapor and carbon dioxide. The water vapor affects the measurement, so it is dehydrated by a membrane permeate dryer. Before entering the dryer, the sample gas must undergo rigorous and efficient filtration to remove all particulate matter and droplets. Any solid or oily substances can clog the membrane pores, causing increased pressure drop or even permanent damage. Therefore, [further details are needed]. Figure 1 As shown, a side-mounted control box 2 is installed on the side of the sulfur detection box 1. A guide pipe 10 is set at the bottom of the side-mounted control box. An air inlet 21 is opened on the central guide pipe 16 installed in the middle. A laser scattering sensor is set on the side of the air inlet 21 to obtain the particulate matter concentration value in the sample gas and to perform a comparison action based on the collected value.

[0032] A flow direction regulating pipe 4 is installed inside the side-mounted control box 2. It is connected to the outer guide pipe 10 through the gas guide pipe to form a parallel gas flow path. At the same time, filter elements 9 are symmetrically arranged inside the top flow direction regulating pipe 4, and valves 8 are installed on the side of the filter elements 9. The single-sided flow rule is adopted. When one valve 8 is closed, the valve 8 on the other side of the path is opened to keep the path unobstructed. When the filter element 9 needs to be replaced, there is no need to stop the machine. Just wait for the valve 8 on one side of the path to close, and open the end of the flow direction regulating pipe 4 from one side of the side-mounted control box 2 to take out the filter element 9 to be replaced. This improves the detection efficiency of the entire sample gas.

[0033] For the control of the valves 8 on both sides within the flow direction regulating pipe 4, gears are installed on the rotating shaft 7 of the valves 8 located on the outside of the pipe. In the initial state, the two valves 8 are symmetrically arranged within the flow direction regulating pipe 4, and the top gear is as follows: Figure 3 As shown, a sleeve 5 is also installed on the pipeline, and a toothed sleeve 6 is movably connected to the sleeve 5. The toothed sleeve 6 meshes with the gears on the two rotating shafts 7. With the unidirectional rotation of the toothed sleeve 18, one side valve 8 will always be closed while the other side valve 8 is open.

[0034] To achieve the rotary drive of the helical sleeve 6, such as Figure 5 and Figure 6 As shown, a rotating sleeve 18 is also movably connected to the inner side of the toothed sleeve 18. Sliding friction blocks 19 are evenly installed inside the rotating sleeve 18. The friction blocks 19 move outward to contact the inner wall of the toothed sleeve 6, and the toothed sleeve 6 is driven to rotate during the pressing and fitting process.

[0035] For adjusting the position of friction block 19, a locking rod 20 is engaged on its outer protrusion. This locking rod 20 is fixed to the lifting sleeve 14, which is located on the surface of the rotating column 12. Figure 4 As shown, a speed-changing assembly 3 is installed inside the side-mounted control box 2. The motor inside the speed-changing assembly 3 drives the rotating column 12 to rotate. The outer wall of the rotating column 12 is uniformly connected to the rotating weight column 13. The counterweight ball at the end of the rotating weight column 13 is lifted along with the rotation, thereby driving the lifting sleeve 14 connected to its bottom to rise. During the rise of the lifting sleeve 14, the inclined surface of the clamping rod 20 abuts against the friction block 19, pushing the friction block 19 to move inward as a whole, and finally contacting and pressing the side wall of the middle screw 15. The screw 15 is driven to rotate by mutual friction.

[0036] like Figure 4 As shown, one end of the lead screw 15 extends into the central through pipe 16, and the sealing plug 17 located in the central through pipe 16 moves upward as the lead screw 15 rotates. This causes the sample gas, which originally entered from the air inlet 21 and then moved upward, to be intercepted by the sealing plug 17 and move directly downward. It then enters the collector pipe 11 directly from the guide pipe 10 for direct water vapor treatment. This type of direct exhaust is suitable for samples with low impurity content below the set action threshold, which meets the direct treatment requirements.

[0037] By adjusting the rotation speed of the rotary column 12, the central connecting screw 15 is driven. Similarly, to control the angle of the valve 8 inside the flow direction regulating pipe 4, the rotation of the rotary column 12 is used to reduce its speed. This is achieved by moving the lifting sleeve 14 downwards and outwards to push the friction blocks 19 in the entire rotating sleeve 18. The four friction blocks 19 move backwards, causing their outer arc surfaces to contact the toothed sleeve 6 on the sleeve 5. Simultaneously, they rotate on the toothed sleeve 6. Figure 5As shown, when the outer spiral sleeve 6 rotates clockwise, the gear on the right rotating shaft 7 rotates counterclockwise, causing the opening of the right valve 8 to increase. Conversely, the left valve 8 also rotates counterclockwise, causing the symmetrically distributed left valve 8 to close. The sample gas discharged from the air inlet 21 rises and enters the corresponding filter element 9 from the right side. After filtration, it is discharged. The opening of the valves 8 on both sides is controlled by rotating the rotating column 12 at low speed, and the flow direction of the sample gas is controlled by rotating at high speed, so as to realize the high-speed and intelligent detection of the sample gas.

[0038] Example 2: Considering that the opening and closing angle of the rotary weight rod is large during high-speed rotation, after the position of the sealing plug 17 is adjusted, there is no need for continuous rotation. At this time, the transmission assembly needs to complete the stationary position of the rotary column 12. The rotation speed of the rotary column 12 decreases, and the position of the lifting sleeve 14 gradually decreases, which will cause the moving friction block 19 to contact the outer toothed sleeve 6 and drive it to rotate. In order to avoid unnecessary valve 8 opening control, the entire rotary column 12 needs to stop suddenly without affecting the rotation of the toothed sleeve 6.

[0039] A locking sleeve is installed on the rotating shaft 7 located outside the guide tube 10. When the filter element 9 needs to be replaced, the locking sleeve on the entire rotating shaft 7 is removed to automatically control the rotation of the subsequent valve 8. Then it is disassembled and replaced. As for the adjustment of the position of the subsequent sealing plug 17, because the locking sleeve restricts the position of the rotating shaft 7, the rotation speed of the rotating column 12 is reduced to a certain value. Then the friction block 19 directly contacts the limiting rotating tooth sleeve 6. The rotating tooth sleeve 6 is fixed and the rotating friction block 19 stops quickly, avoiding the impact of the deceleration process on the valve 8.

[0040] Routine maintenance can be carried out by opening the side-mounted control box 2 and the sulfur detection box 1, which is convenient and quick. The corresponding detection data will also be displayed on the external screen of the sulfur detection box 1.

[0041] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 the invention. In this specification, 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.

[0043] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A direct-feed total sulfur analyzer with a pretreatment structure, comprising a sulfur detection chamber (1) and a side-mounted control chamber (2), characterized in that, The side-mounted control box (2) is equipped with a flow direction regulating pipe (4). The bottom sides of the flow direction regulating pipe (4) are symmetrically connected with air guide pipes, and the air guide pipes pass through the side-mounted control box (2) and are connected to a fixed guide pipe (10). The flow direction regulating pipe (4) and the guide pipe (10) are also connected to a central pipe (16), an air inlet (21) is provided on the central pipe (16), and a collection pipe (11) is evenly installed at the bottom of the guide pipe (10). One end of the collection pipe (11) passes through the sulfur detection box (1) and is connected to the sulfur detector installed in the sulfur detection box (1). The flow direction regulating pipe (4) is symmetrically installed with filter elements (9), and the inner wall of the flow direction regulating pipe (4) on the side of the filter element (9) is movable with a valve (8). A rotating shaft (7) is installed on the valve (8) to drive the valve (8) to rotate and complete the sealing of the corresponding side flow direction regulating pipe (4). A sealing plug (17) is slidably connected to the inner wall of the central pipe (16). The side-mounted control box (2) is equipped with a speed transmission assembly (3), which includes a servo motor and a gearbox installed inside the box. The speed transmission assembly (3) has a rotating column (12) installed at the bottom. The outer wall of the rotating column (12) is evenly connected to a rotating weight column (13). A lifting sleeve (14) is slidably sleeved on the rotating column (12) and located at the bottom of the rotating weight column (13). The top rotating rod of the lifting sleeve (14) is movably connected to the corresponding rotating weight column (13). The bottom of the lifting sleeve (14) is evenly fixed with a locking rod (20). A rotating sleeve (18) is movably connected inside the side-mounted control box (2) and located in the rotating sleeve (6). A friction block (19) is uniformly slidably connected on the rotating sleeve (18). One side of the clamping rod (20) is correspondingly engaged with the protrusion on the side wall of the friction block (19). A lead screw (15) is installed on the rotating sleeve (18), and one end of the lead screw (15) is movably connected to the rotating column (12).

2. The direct-feed total sulfur analyzer with pretreatment structure according to claim 1, characterized in that, The rotating shaft (7) is fitted with a gear on the top side of the flow direction regulating pipe (4). A sleeve (5) is fitted and fixed on the flow direction regulating pipe (4). A helical sleeve (6) is movably connected to the top of the sleeve (5) through a bearing. The two sides of the helical sleeve (6) are respectively meshed with the gear on the rotating shaft (7).

3. The direct-feed total sulfur analyzer with pretreatment structure according to claim 2, characterized in that, The bottom end of the lead screw (15) passes through the flow direction regulating pipe (4) and the sealing plug (17) respectively and is movably connected to the inner wall of the guide pipe (10). The rotating shaft (7) set outside the side-mounted control box (2) is fitted with a locking sleeve to restrict the rotation of the rotating shaft (7).

4. The direct-feed total sulfur analyzer with pretreatment structure according to claim 3, characterized in that, The pretreatment method for the total sulfur analyzer is as follows: The sample enters a high-temperature heating furnace and burns at 1100℃. The sulfides are converted into sulfur dioxide, and the hydrocarbons are converted into water vapor and carbon dioxide. After cooling, the sample is introduced into the air inlet (21) of the central pipe (16). The sample gas enters one side of the flow regulating pipe (4), the valve (8) of the other side pipe is closed, and after being filtered by the filter element (9), it enters the guide pipe (10), and finally enters the membrane permeate drying gas along the collection pipe (11). After removing water vapor, it is subjected to sulfur detection treatment. The laser scattering sensor installed on the side of the air inlet (21) monitors impurities in the sample gas. The monitoring period is set. If the impurity value does not exceed the set threshold during the corresponding period, the speed change component (3) drives the rotating column (12) to rotate at high speed. During the rotation, the rotating column (13) completes the lifting sleeve (14) to lift, causing the clamping rod (20) to drive the friction block (19) inside the rotating sleeve (18) to move inward. The friction block (19) contacts the top side wall of the screw (15) and clamps the screw (15) to rotate synchronously. The rotation of the screw (15) drives the sealing plug (17) inside the central tube (16) to move upward, so that the sample gas that is subsequently discharged is directly discharged into the sulfur detection box (1) through the connecting pipe (10).

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