Sulfonic acid processing sulfonation tail gas detection sampling device

Abstract

The invention relates to the technical field of tail gas detection, in particular to a sulfonic acid processing sulfonation tail gas detection sampling device which is characterized in that a three-way valve is arranged on the upper side of a cyclone separator, a sampling mechanism is arranged on the upper side of the three-way valve, and a docking mechanism is arranged on the sampling mechanism; according to the invention, the sampling assembly in the sampling mechanism is matched with the docking mechanism, so that sulfonated tail gas needing to be circulated and discharged in advance in the sampling process can be collected and flows back to the conveying pipe communicated with the electrostatic demister, and a plurality of sampling points at different positions can be arranged in the same section of sulfonated tail gas flow; therefore, synchronous multi-point random sampling on the same section of sulfonated tail gas flow can be realized; according to the invention, the butt-joint assembly in the butt-joint mechanism is matched with the quick-mounting assembly in the sampling mechanism, so that the gas collecting bag can be quickly sealed and mounted to a point position needing to be sampled so as to sample sulfonated tail gas.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas detection, in particular to a sulfonic acid processing sulfonation tail gas detection sampling device. Background Art

[0002] Sulfonic acid is a kind of organic compound containing sulfonic acid group. Because of its strong acidity, it is widely used in industry and chemical synthesis, especially in the production and processing of dyes, drugs, catalysts, surfactants and detergents. Sulfonated tail gas refers to the waste gas generated in the production process of sulfonic acid. The process of treating sulfonated tail gas is generally to pass the tail gas into a cyclone separator first (such as Figure 1 The tail gas is input into the electrostatic precipitator after most of the droplets are removed by the cyclone separator. Under the action of the electrostatic precipitator, some substances in the sulfonated tail gas will be converted into black sulfonic acid sold as a by-product. Then the tail gas treated by the electrostatic precipitator is input into the alkali washing tower. The alkali washing tower can absorb the residual sulfide in the tail gas until the tail gas meets the emission standards and can be directly discharged into the atmosphere. The alkali washing liquid used to absorb the sulfide flows into the sewage treatment pool through the sewage pipe for treatment.

[0003] In the prior art, it is generally necessary to sample and test the sulfonated tail gas generated during the sulfonic acid production process. On the one hand, this is to evaluate the concentration of pollutants in the tail gas, ensure that the emission of sulfonated tail gas meets national and local requirements, and avoid exhaust gas emissions from polluting the atmospheric environment. On the other hand, by detecting the components in the tail gas, the efficiency of the sulfonation reaction and the occurrence of side reactions can be understood, thereby optimizing the production process.

[0004] However, the traditional method of sampling and testing sulfonated tail gas during the sulfonic acid processing has the following problems: 1. At present, it is generally necessary to open the sampling point valve first to allow the sulfonated tail gas to circulate for a period of time to remove the accumulated gas in the pipeline. However, the above operation method will discharge a certain amount of untreated sulfonated tail gas into the atmosphere. If there are pollutants or harmful substances in the tail gas, it will not only cause a certain degree of pollution to the atmospheric environment, but also endanger the personal safety of the operators; 2. In addition, the operator is generally required to insert a single sampling probe into the sulfonated tail gas transmission pipeline for sampling. Since the sampling position of the sampling probe is usually set at the center of the pipeline, it is impossible to simultaneously sample multiple different random positions in the same section of the sulfonated tail gas flow, and thus it is impossible to guarantee the randomness and comprehensiveness of the samples taken and the representativeness of the final sample test results. Summary of the invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sulfonic acid processing sulfonation tail gas detection sampling device, which is used to sample the sulfonation tail gas generated in the sulfonic acid processing process, and the detection sampling device includes a three-way valve connected between a cyclone separator and an electrostatic precipitator, a sampling mechanism connected to another outlet of the three-way valve, and a docking mechanism arranged on the sampling mechanism.

[0006] The sampling mechanism includes a sampling component, a fixed tube, an opening and closing component and a quick-release component; a sampling component is arranged on the upper side of the three-way valve, a plurality of fixed tubes are fixedly arranged on the sampling component, an opening and closing component is arranged inside the fixed tube, and a quick-release component is arranged on the fixed tube.

[0007] The docking mechanism includes an air collecting bag, a rubber hose, a docking assembly and a sealing assembly; an air collecting bag is arranged on the sampling assembly, and rubber hoses are symmetrically fixedly arranged on the upper and lower sides of the air collecting bag, and docking assemblies are arranged on the opposite ends of the upper and lower symmetrical rubber hoses, and the upper and lower symmetrical docking assemblies are docked with the opening and closing assemblies and quick-release assemblies on the corresponding fixed pipes, and the upper and lower symmetrical rubber hoses and the corresponding docking assemblies are jointly provided with sealing assemblies.

[0008] Preferably, the cyclone separator comprises a conical cylinder, an air inlet pipe and an exhaust pipe; the air inlet pipe is fixedly arranged on the left side of the conical cylinder, and the air inlet pipe is fixedly arranged on the upper end of the conical cylinder.

[0009] Preferably, the three-way valve includes a control valve, a lower conical tube, an upper conical tube and an input pipe; the lower conical tube is fixedly provided at the upper end of the exhaust pipe, the control valve is fixedly provided at the upper end of the lower conical tube, the upper conical tube is fixedly provided on the upper side of the control valve, and the input pipe for conveying sulfonated tail gas to the electrostatic precipitator is fixedly provided on the right side of the control valve, and the control valve controls the lower conical tube to be connected to the upper conical tube, or the lower conical tube to be connected to the input pipe separately.

[0010] Preferably, the sampling assembly includes a sampling hood, a sampling tube, a confluence hood, a connecting tube and a return tube; a sampling hood is fixedly provided on the upper end of the upper conical tube, a plurality of sampling tubes with flared lower ends are evenly fixedly provided on the upper surface of the sampling hood, a fixed tube is fixedly provided on the upper end of the sampling tube, a confluence hood is fixedly provided on the upper side of the sampling hood through four rods, a plurality of connecting tubes corresponding to the sampling tubes are evenly fixedly provided on the lower side of the confluence hood, a fixed tube is also fixedly provided on the lower end of the connecting tube, the connecting tube and the fixed tube on the sampling tube are symmetrically arranged up and down, a return tube is fixedly provided on the upper end of the confluence hood, and the lower end of the return tube is connected to the input pipe.

[0011] Preferably, the opening and closing assembly includes a sealing groove, a spring, a sliding cover, a conical vent cover, a sealing sheet and a push rod; a sealing groove composed of a cylindrical groove and a conical groove is provided in the fixed tube, wherein the diameter of the conical groove close to the cylindrical groove is larger than the diameter of the end away from the cylindrical groove, wherein a spring is fixedly provided at the end of the cylindrical groove away from the conical groove, and a sliding cover slidably connected to the cylindrical groove is fixedly provided at the end of the spring close to the conical groove, a conical vent cover is fixedly provided at the end of the sliding cover close to the conical groove, a plurality of vent holes are evenly provided on the conical vent cover, a sealing sheet that cooperates with the tip of the conical groove for sealing is fixedly provided at the tip of the conical vent cover through a rod member, and a push rod is fixedly provided on the side of the sealing sheet away from the conical vent cover.

[0012] Preferably, the quick-release assembly includes a plug-in tube, balls, a pad, a sliding sleeve, a positioning ring and an anti-slip ring; a plug-in tube is fixedly provided on one side of the fixed tube close to the tip of the conical groove, a plurality of balls are uniformly and movably provided on the side wall of the plug-in tube away from one end of the fixed tube, a pad is fixedly provided on the outer surface of the plug-in tube close to one end of the fixed tube, a sliding sleeve is elastically and slidably provided on the pad, a positioning ring is fixedly provided on one end of the sliding sleeve away from the pad, and an anti-slip ring is fixedly provided on one side of the positioning ring away from the sliding sleeve.

[0013] Preferably, the docking assembly includes a docking tube, a docking groove, a tapered sleeve and a clamping groove; an opening and closing assembly is also arranged in the docking tube, and the opening and closing assembly in the docking tube is arranged relative to the opening and closing assembly in the corresponding fixed tube, the elastic coefficient of the spring in the docking tube is smaller than the elastic coefficient of the spring in the corresponding fixed tube, a docking groove for engaging with a ball is provided on the outer surface of the docking tube close to one end of the corresponding fixed tube, a tapered sleeve for elastically docking with the corresponding rubber hose is fixedly arranged on one end of the docking tube away from the corresponding fixed tube, and a clamping groove is provided on the outer surface of the tapered sleeve.

[0014] Preferably, the sealing assembly includes a sealing clamp, a sealing ring and a docking plate; the conical sleeves that are symmetrical in both directions are provided with sealing clamps symmetrically, the left ends of the sealing clamps that are symmetrical in both directions are rotatably connected via a hinge seat, the opposite sides of the sealing clamps that are symmetrical in both directions are fixedly provided with sealing rings that are snap-fitted with corresponding clamping grooves, the right ends of the sealing clamps that are symmetrical in both directions are fixedly provided with docking plates, and the docking plates that are symmetrical in both directions are fixedly connected via bolts.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention cooperates with the sampling assembly and the docking mechanism in the sampling mechanism to collect the sulfonated tail gas that needs to be circulated and discharged in advance during the sampling process and reflux it into the delivery pipe connected to the electrostatic precipitator, thereby not only avoiding the influence of the accumulated gas in the pipeline on the purity of the sample taken, but also avoiding the direct discharge of a certain amount of untreated sulfonated tail gas into the atmosphere, thereby avoiding the harmful substances in the untreated tail gas from causing a certain degree of pollution to the atmosphere and endangering the personal safety of the operators.

[0017] 2. The present invention can also realize setting a plurality of sampling points at different positions in the same section of sulfonated tail gas flow by cooperating with the sampling assembly and the docking mechanism in the sampling mechanism, thereby realizing synchronous multi-point random sampling of the same section of sulfonated tail gas flow, thereby ensuring the randomness and comprehensiveness of the samples taken and the representativeness of the final sample detection results.

[0018] 3. The present invention cooperates with the docking assembly in the docking mechanism and the quick-install assembly in the sampling mechanism to realize the rapid sealing installation of the air collecting bag to the desired sampling point to sample the sulfonated exhaust gas, thereby not only reducing the sulfonated exhaust gas emissions during the sampling process to a certain extent, but also increasing the installation speed of the air collecting bag, thereby improving the overall sampling and detection operational efficiency of the sulfonated exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the sulfonation tail gas treatment process.

[0020] Figure 2 It is a schematic diagram of the structure of the present invention.

[0021] Figure 3 It is a schematic diagram of the front cross-sectional structure of a three-way valve.

[0022] Figure 4 It is a schematic diagram of the front cross-sectional structure of the sampling mechanism and the docking mechanism.

[0023] Figure 5 It is a partial cross-sectional schematic diagram of the sampling mechanism and some structures of the docking mechanism.

[0024] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the docking assembly and the sealing assembly.

[0025] In the figure: 1, cyclone separator; 11, cone cylinder; 12, air inlet pipe; 13, exhaust pipe; 2, three-way valve; 21, control valve; 22, lower cone pipe; 23, upper cone pipe; 24, input pipe; 3, electrostatic demister; 4, sampling mechanism; 41, sampling assembly; 411, sampling cover; 412, sampling tube; 413, confluence cover; 414, connecting pipe; 415, return pipe; 42, fixed pipe; 43, opening and closing assembly; 431, sealing groove; 432, spring; 433, sliding cover; 434, cone shaped ventilation hood; 435, sealing sheet; 436, push rod; 44, quick-release assembly; 441, plug-in tube; 442, ball bearing; 443, pad; 444, sliding sleeve; 445, positioning ring; 446, anti-slip ring; 5, docking mechanism; 51, air collecting bag; 52, rubber hose; 53, docking assembly; 531, docking tube; 532, docking groove; 533, conical sleeve; 534, clamp groove; 54, sealing assembly; 541, sealing clamp; 542, sealing ring; 543, docking plate; 6, alkali absorption tower. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 and Figure 2 A sulfonic acid processing sulfonated tail gas detection sampling device is used to sample the sulfonated tail gas generated in the sulfonic acid processing process. The sulfonated tail gas enters the cyclone separator 1, the electrostatic precipitator 3 and the alkali absorption tower 6 for treatment in sequence. The detection sampling device includes a three-way valve 2 connected between the cyclone separator 1 and the electrostatic precipitator 3, a sampling mechanism 4 connected to the other outlet of the three-way valve 2, and a docking mechanism 5 arranged on the sampling mechanism 4.

[0028] See also Figure 2 and Figure 3 The cyclone separator 1 includes a conical cylinder 11, an air inlet pipe 12 and an exhaust pipe 13; the air inlet pipe 12 is fixedly arranged on the left side of the conical cylinder 11, and the air inlet pipe 12 is fixedly arranged on the upper end of the conical cylinder 11.

[0029] It should be noted that the cyclone separator 1 is a prior art, and the specific principle will not be described in detail. Only the structure required in this embodiment is introduced here.

[0030] See also Figure 2 and Figure 3The three-way valve 2 includes a control valve 21, a lower conical tube 22, an upper conical tube 23 and an input pipe 24; the lower conical tube 22 is fixedly provided at the upper end of the exhaust pipe 13, the control valve 21 is fixedly provided at the upper end of the lower conical tube 22, the upper side of the control valve 21 is fixedly provided with an upper conical tube 23, and the right side of the control valve 21 is fixedly provided with an input pipe 24 for conveying sulfonated tail gas to the electrostatic precipitator 3, and the control valve 21 controls the lower conical tube 22 to be connected to the upper conical tube 23, or the lower conical tube 22 to be connected to the input pipe 24 separately.

[0031] See also Figure 4 and Figure 5 The sampling mechanism 4 includes a sampling component 41, a fixed tube 42, an opening and closing component 43 and a quick-release component 44; the sampling component 41 is arranged on the upper side of the upper conical tube 23, a plurality of fixed tubes 42 are fixedly arranged on the sampling component 41, an opening and closing component 43 is arranged inside the fixed tube 42, and a quick-release component 44 is arranged on the fixed tube 42.

[0032] See also Figure 2 , Figure 3 and Figure 4 The sampling assembly 41 includes a sampling cover 411, a sampling tube 412, a confluence cover 413, a connecting pipe 414 and a return pipe 415; the upper end of the upper conical tube 23 is fixedly provided with a sampling cover 411, and a plurality of sampling tubes 412 with flared lower ends are evenly fixedly provided on the upper surface of the sampling cover 411, and a fixed pipe 42 is fixedly provided on the upper end of each sampling tube 412, and a confluence cover 413 is fixedly provided on the upper side of the sampling cover 411 through four rods, and a plurality of connecting pipes 414 corresponding to the sampling tubes 412 are evenly fixedly provided on the lower side of the confluence cover 413, and a fixed pipe 42 is also fixedly provided on the lower end of the connecting pipe 414, and the connecting pipe 414 and the fixed pipe 42 on the sampling tube 412 are symmetrically arranged up and down, and a return pipe 415 is fixedly provided on the upper end of the confluence cover 413, and the lower end of the return pipe 415 is connected with the input pipe 24.

[0033] See also Figure 5The opening and closing component 43 includes a sealing groove 431, a spring 432, a sliding cover 433, a conical vent cover 434, a sealing sheet 435 and a push rod 436; a sealing groove 431 composed of a cylindrical groove and a conical groove is provided in the fixed tube 42, wherein the diameter of the conical groove close to the cylindrical groove is larger than the diameter of the end away from the cylindrical groove, wherein a spring 432 is fixedly provided at the end of the cylindrical groove away from the conical groove, and a sliding cover 433 slidably connected to the cylindrical groove is fixedly provided at the end of the spring 432 close to the conical groove, and a conical vent cover 434 is fixedly provided at the end of the sliding cover 433 close to the conical groove, and a plurality of vent holes are evenly provided on the conical vent cover 434, and a sealing sheet 435 that cooperates with the tip of the conical groove for sealing is fixedly provided at the tip of the conical vent cover 434 through a rod 2, and a push rod 436 is fixedly provided on the side of the sealing sheet 435 away from the conical vent cover 434.

[0034] When the sulfonated tail gas to be sampled is to be input into the sampling hood 411, the lower conical tube 22 and the upper conical tube 23 are first connected separately through the control valve 21, and then the sulfonated tail gas to be treated is introduced into the conical cylinder 11 through the air inlet pipe 12. Under the action of the cyclone separator 1, most of the droplets in the sulfonated tail gas will fall from the lower end of the conical cylinder 11, and the sulfonated tail gas treated by the cyclone separator 1 is input into the lower conical tube 22 and the control valve 21 through the exhaust pipe 13, and finally input into the sampling hood 411 through the upper conical tube 23. The sampling tubes 412 evenly distributed on the sampling hood 411 can realize synchronous sampling of different positions in the same section of the sulfonated tail gas flow, thereby ensuring the randomness and comprehensiveness of the samples taken and the representativeness of the final sample detection results, wherein the expansion of the lower end of the sampling tube 412 can ensure the rapid and stable input of the sulfonated tail gas.

[0035] When the fixed tube 42 is not docked with the docking mechanism 5 for sampling, the spring 432 can drive the sealing sheet 435 through the sliding cover 433 to always seal tightly with the tip of the conical groove in the corresponding sealing groove 431, thereby achieving adaptive sealing of the fixed tube 42. The above-mentioned operation method can ensure the sealing of the sampling tube 412 at the points where sampling is not required, thereby ensuring the overall sealing of the sulfonated exhaust gas treatment equipment during the sampling process, and avoiding the leakage of sulfonated exhaust gas containing pollution or harmful substances into the atmospheric environment as much as possible.

[0036] See also Figure 5The quick-release assembly 44 includes a plug-in tube 441, a ball 442, a pad 443, a sliding sleeve 444, a positioning ring 445 and an anti-slip ring 446; the plug-in tube 441 is fixedly provided on one side of the fixed tube 42 close to the tip of the conical groove, and a plurality of balls 442 are uniformly provided on the side wall of the plug-in tube 441 away from one end of the fixed tube 42, and a pad 443 is fixedly provided on the outer surface of the plug-in tube 441 close to the end of the fixed tube 42. The plate 443 is an annular plate structure, and a sliding sleeve 444 is elastically and slidably provided on the pad 443. A positioning ring 445 is fixedly provided on the end of the sliding sleeve 444 away from the pad 443, and an anti-slip ring 446 is fixedly provided on the side of the positioning ring 445 away from the sliding sleeve 444. The inner diameter of the positioning ring 445 is smaller than the inner diameters of the anti-slip ring 446 and the tube wall of the sliding sleeve 444, and the connection between the positioning ring 445 and the inner wall of the anti-slip ring 446 is an inclined surface.

[0037] See also Figure 2 and Figure 4 The docking mechanism 5 includes an air collecting bag 51, a rubber hose 52, a docking assembly 53 and a sealing assembly 54; an air collecting bag 51 is arranged between the sampling tube 412 and the connecting tube 414, and rubber hoses 52 are symmetrically fixedly arranged on the upper and lower sides of the air collecting bag 51, and docking assemblies 53 are arranged on the opposite ends of the rubber hoses 52 which are symmetrical up and down, and the docking assemblies 53 which are symmetrical up and down are docked with the opening and closing assemblies 43 and the quick-release assemblies 44 on the corresponding fixed tubes 42, and the sealing assemblies 54 are commonly arranged on the rubber hoses 52 which are symmetrical up and down and the corresponding docking assemblies 53.

[0038] See also Figure 5 and Figure 6 The docking assembly 53 includes a docking tube 531, a docking groove 532, a tapered sleeve 533 and a clamping groove 534; an opening and closing assembly 43 is also arranged in the docking tube 531, and the opening and closing assembly 43 in the docking tube 531 is arranged opposite to the opening and closing assembly 43 in the corresponding fixed tube 42. The elastic coefficient of the spring 432 in the docking tube 531 is smaller than the elastic coefficient of the spring 432 in the corresponding fixed tube 42. An annular docking groove 532 for engaging with the ball 442 is provided on the outer surface of the docking tube 531 near the corresponding fixed tube 42. A tapered sleeve 533 for elastically docking with the corresponding rubber hose 52 is fixedly arranged on the end of the docking tube 531 away from the corresponding fixed tube 42, and an annular clamping groove 534 is provided on the outer surface of the tapered sleeve 533.

[0039] When the butt joint pipe 531 is to be installed with the corresponding fixed pipe 42, the sliding sleeve 444 is first moved toward the end away from the butt joint pipe 531. Figure 5As shown, when the fixed tube 42 located below and the docking assembly 53 located below are plugged together, the sliding sleeve 444 is moved downward until the ball 442 on the corresponding plug-in tube 441 can move to the outside of the plug-in tube 441 and contact the anti-slip ring 446, and then the docking tube 531 is inserted into the corresponding plug-in tube 441. The ball 442 first moves to the outside of the plug-in tube 441 and contacts the anti-slip ring 446 under the pressure of the insertion end of the docking tube 531. The anti-slip ring 446 can ensure that the ball 442 will not completely detach from the plug-in tube 441. When the docking groove 532 on the docking tube 531 is aligned with the ball 442, the sliding sleeve 444 is released at this time. Under the action of elastic force, the sliding sleeve 444 drives the positioning ring 445 and the anti-slip ring 446 to move and reset synchronously, that is, the sliding sleeve 444 moves upward, and the positioning ring 445 squeezes all the balls 442 into the docking groove 532 synchronously, so that the docking tube 531 and the corresponding fixed tube 42 can be positioned and installed together through the balls 442; when the docking tube 531 is to be taken out of the corresponding plug-in tube 441, the sliding sleeve 444 is first moved to the end away from the docking tube 531 until the balls 442 can move to the outside of the plug-in tube 441 and contact the anti-slip ring 446, and then the docking tube 531 can be directly pulled out of the plug-in tube 441.

[0040] When the butt joint 531 is inserted into the plug-in tube 441, the push rod 436 on the butt joint 531 will contact and squeeze the push rod 436 in the fixed tube 42. Since the elastic coefficient of the spring 432 in the butt joint 531 is smaller than the elastic coefficient of the spring 432 in the corresponding fixed tube 42, the spring 432 in the butt joint 531 is compressed first, and the push rod 436 on the butt joint 531 drives the corresponding sealing sheet 435 to separate from the tip of the conical groove until the spring 432 in the butt joint 531 can no longer be compressed. At this time, the fixed tube 42 is 2 begins to be compressed, and the sealing sheet 435 in the fixed tube 42 is separated from the tip of the corresponding conical groove until the spring 432 in the fixed tube 42 can no longer be compressed. At this time, the butt joint tube 531 can be fixed in the plug-in tube 441 by the ball 442, so that the fixed tube 42 and the butt joint tube 531 are positioned, installed and connected. The above operation method can quickly connect the gas collection bag 51 with the sampling tube 412 and the connecting tube 414 corresponding to the sampling point, thereby improving the overall sampling and detection efficiency of the sulfonated tail gas.

[0041] See also Figure 6The sealing assembly 54 includes a sealing clamp 541, a sealing ring 542 and a docking plate 543; the sealing clamps 541 are symmetrically arranged on the conical sleeve 533 which is symmetrical in both directions, and the left ends of the symmetrical sealing clamps 541 are rotatably connected through a hinge seat, and the opposite sides of the symmetrical sealing clamps 541 are fixedly provided with sealing rings 542 which are snap-fitted with the corresponding clamping groove 534, and the right ends of the symmetrical sealing clamps 541 are fixedly provided with docking plates 543, and the symmetrical docking plates 543 are fixedly connected through bolts.

[0042] When the rubber hose 52 and the corresponding docking tube 531 are to be sealed and installed together, the movable end of the rubber hose 52 is first clamped on the corresponding tapered sleeve 533. The conical section of the tapered sleeve 533 can facilitate the rapid clamping and positioning of the rubber hose 52, and the elastic deformation of the rubber hose 52 itself can ensure the sealing of the connection with the tapered sleeve 533 to a certain extent. Then, the sealing ring 542 on the sealing clamp 541 is aligned with the corresponding clamping groove 534 and clamped in. Finally, the corresponding two docking plates 543 are fastened together by bolts, so that the connection between the rubber hose 52 and the tapered sleeve 533 is stably clamped and fixed by the sealing clamp 541. The above operation method not only further ensures the sealing of the rubber hose 52 and the corresponding tapered sleeve 533, but also further ensures the stability of the connection between the rubber hose 52 and the tapered sleeve 533 during the sampling process.

[0043] Specifically, when the air collecting bag 51 is to be connected to the sampling tube 412 and the connecting tube 414 at the corresponding sampling point, the movable ends of the rubber hoses 52 on both sides of the air collecting bag 51 are first sealed and fixed to the corresponding conical sleeves 533 by the sealing clamps 541, and then the butt joint 531 installed on one of the rubber hoses 52 is positioned and connected to the fixed tube 42 on the corresponding connecting tube 414, and then the butt joint 531 installed on the other rubber hose 52 is positioned and connected to the fixed tube 42 on the corresponding sampling tube 412. 2 is positioned and connected. Since the elastic coefficient of the spring 432 in the fixed tube 42 is relatively large, when the butt-joint tube 531 is inserted, the sealing sheet 435 in the fixed tube 42 will be separated from the tip of the corresponding conical groove and contact and seal. When the butt-joint tube 531 is taken out, the sealing sheet 435 in the fixed tube 42 will first be closely attached to and sealed at the tip of the corresponding conical groove. Thus, during the process of installing or removing the gas collecting bag 51, the sulfonated tail gas outputted from the sampling tube 412 can be prevented from entering the gas collecting bag 51 and leaking into the atmosphere.

[0044] When sampling the sulfonated tail gas treated by the cyclone separator 1 in the sampling hood 411, first install and connect the gas collecting bag 51 between the sampling tube 412 and the connecting tube 414 at the corresponding sampling point. The specific installation quantity and position are determined according to actual needs. At this time, the lower conical tube 22 and the upper conical tube 23 are connected through the control valve 21, so that the sulfonated tail gas treated by the cyclone separator 1 is input into the sampling hood 411. The tail gas at different positions in the same section of the sulfonated tail gas flow is then input into the gas collecting bag 51 through the corresponding sampling tube 412. At this time, the sulfonated tail gas is first circulated for a period of time to remove the accumulated gas in the pipeline. This part of the sulfonated tail gas can be refluxed through the confluence hood 413 and the reflux pipe 415 and input into the input pipe 24 connected to the electrostatic precipitator 3, thereby not only avoiding the influence of the accumulated gas in the pipeline on the purity of the exhaust gas sample, but also avoiding the atmospheric environment. A certain amount of untreated sulfonated exhaust gas is directly discharged into the environment; when the sulfonated exhaust gas has been circulating for a period of time, the rubber hose 52 connected to the connecting pipe 414 on the air collecting bag 51 is first tied up, and after the exhaust gas has flowed into the air collecting bag 51 for a period of time, the rubber hose 52 connected to the sampling tube 412 is tied up again, so as to prevent the exhaust gas sample in the air collecting bag 51 from escaping, and finally the lower conical tube 22 is connected to the input pipe 24 through the control valve 21 to ensure that the sulfonated exhaust gas can be normally passed into the electrostatic precipitator 3 for the next step of treatment. At this time, the air collecting bag 51 can be removed by taking out the docking tube 531 to obtain the corresponding exhaust gas sample, and the docking assembly 53 used for docking and the sealing assembly 54 used to fix the rubber hose 52 can be removed and cleaned and then put into use again. The above operation method can ensure the normal sampling and detection while reducing the cost of consumables as much as possible, thereby reducing the waste of resources.

[0045] The sulfonated tail gas detection sampling device provided in the present embodiment can not only be installed between the cyclone separator 1 and the electrostatic precipitator 3 to sample the sulfonated tail gas treated by the cyclone separator 1, but also be installed between the electrostatic precipitator 3 and the alkali absorption tower 6 to sample the sulfonated tail gas treated by the cyclone separator 1 and the electrostatic precipitator 3, and can also be installed at the exhaust end of the alkali absorption tower 6 to sample the sulfonated tail gas treated by three passes. The detection indicators of the sulfonated tail gas samples sampled from different positions are different. When the sulfonated tail gas detection sampling device provided in the present embodiment is installed at different positions, the sampling device can be connected to the connecting end between the electrostatic precipitator 3 and the alkali absorption tower 6 or the corresponding position on the exhaust end of the alkali absorption tower 6 by a reducer of corresponding size to ensure that the sulfonated tail gas detection sampling device can stably act at different sampling positions.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfonic acid processing sulfonation tail gas detection sampling device, used for sampling the sulfonation tail gas generated in the sulfonic acid processing process, characterized in that: The detection sampling device comprises a three-way valve (2) connected between the cyclone separator (1) and the electrostatic demister (3), a sampling mechanism (4) connected to another outlet of the three-way valve (2), and a docking mechanism (5) arranged on the sampling mechanism (4); The sampling mechanism (4) comprises a sampling assembly (41), a fixed tube (42), an opening and closing assembly (43) and a quick-install assembly (44); the sampling assembly (41) is arranged on the upper side of the three-way valve (2); a plurality of fixed tubes (42) are fixedly arranged on the sampling assembly (41); the opening and closing assembly (43) is arranged inside the fixed tube (42); and the quick-install assembly (44) is arranged on the fixed tube (42); The docking mechanism (5) comprises an air collecting bag (51), a rubber hose (52), a docking assembly (53) and a sealing assembly (54); the sampling assembly (41) is provided with an air collecting bag (51), and the upper and lower sides of the air collecting bag (51) are symmetrically fixed with rubber hoses (52), and the opposite ends of the upper and lower symmetrical rubber hoses (52) are both provided with docking assemblies (53), and the upper and lower symmetrical docking assemblies (53) are both docked with the opening and closing assemblies (43) and the quick-release assemblies (44) on the corresponding fixed pipes (42), and the upper and lower symmetrical rubber hoses (52) and the corresponding docking assemblies (53) are jointly provided with sealing assemblies (54).

2. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 1, characterized in that: The cyclone separator (1) comprises a conical cylinder (11), an air inlet pipe (12) and an air outlet pipe (13); the air inlet pipe (12) is fixedly arranged on the left side of the conical cylinder (11), and the air inlet pipe (12) is fixedly arranged on the upper end of the conical cylinder (11).

3. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 2, characterized in that: The three-way valve (2) comprises a control valve (21), a lower conical tube (22), an upper conical tube (23) and an input pipe (24); the lower conical tube (22) is fixedly arranged at the upper end of the exhaust pipe (13), the control valve (21) is fixedly arranged at the upper end of the lower conical tube (22), the upper side of the control valve (21) is fixedly arranged with the upper conical tube (23), the right side of the control valve (21) is fixedly arranged with an input pipe (24) for conveying sulfonated tail gas to the electrostatic demister (3), and the control valve (21) controls the lower conical tube (22) and the upper conical tube (23), or the lower conical tube (22) and the input pipe (24) to be independently connected.

4. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 3, characterized in that: The sampling assembly (41) comprises a sampling cover (411), a sampling tube (412), a confluence cover (413), a connecting tube (414) and a return tube (415); the upper end of the upper conical tube (23) is fixedly provided with a sampling cover (411); a plurality of sampling tubes (412) with flared lower ends are evenly fixedly provided on the upper surface of the sampling cover (411); a fixing tube (42) is fixedly provided on the upper end of the sampling tube (412); the upper side of the sampling cover (411) is fixedly provided with four rods. A collector (413) is provided, and a plurality of connecting tubes (414) corresponding to the sampling tubes (412) are evenly and fixedly arranged on the lower side of the collector (413), and a fixed tube (42) is also fixedly arranged at the lower end of the connecting tube (414), and the connecting tube (414) and the fixed tube (42) on the sampling tube (412) are symmetrically arranged up and down, and a return tube (415) is fixedly arranged at the upper end of the collector (413), and the lower end of the return tube (415) is connected to the input tube (24).

5. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 1, characterized in that: The opening and closing assembly (43) comprises a sealing groove (431), a spring (432), a sliding cover (433), a conical vent cover (434), a sealing sheet (435) and a push rod (436); the fixing tube (42) is provided with a sealing groove (431) composed of a cylindrical groove and a conical groove, wherein the diameter of the conical groove close to the cylindrical groove is larger than the diameter of the end away from the cylindrical groove, wherein the end of the cylindrical groove away from the conical groove is fixedly provided with a spring (432), and the spring (432) close to the conical groove is A sliding cover (433) slidably connected to the cylindrical groove is fixedly provided at one end of the sliding cover (433), a conical ventilation cover (434) is fixedly provided at one end close to the conical groove, a plurality of ventilation holes are evenly provided on the conical ventilation cover (434), a sealing sheet (435) which cooperates with the tip of the conical groove for sealing is fixedly provided at the tip of the conical ventilation cover (434) through a rod member 2, and a push rod (436) is fixedly provided on the side of the sealing sheet (435) away from the conical ventilation cover (434).

6. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 1, characterized in that: The quick-release assembly (44) comprises a plug-in tube (441), a ball (442), a pad (443), a sliding sleeve (444), a positioning ring (445) and an anti-slip ring (446); the plug-in tube (441) is fixedly arranged on a side of the fixed tube (42) close to the tip of the conical groove; a plurality of ball (442) are uniformly and movably arranged on the side wall of the plug-in tube (441) away from the end of the fixed tube (42); a pad (443) is fixedly arranged on the outer surface of the plug-in tube (441) close to the end of the fixed tube (42); a sliding sleeve (444) is elastically and slidably arranged on the pad (443); a positioning ring (445) is fixedly arranged on the end of the sliding sleeve (444) away from the pad (443); and an anti-slip ring (446) is fixedly arranged on the side of the positioning ring (445) away from the sliding sleeve (444).

7. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 1, characterized in that: The docking assembly (53) comprises a docking tube (531), a docking groove (532), a tapered sleeve (533) and a clamping groove (534); an opening and closing assembly (43) is also arranged in the docking tube (531); the opening and closing assembly (43) in the docking tube (531) is arranged opposite to the opening and closing assembly (43) in the corresponding fixed tube (42); the elastic coefficient of the spring (432) in the docking tube (531) is smaller than the elastic coefficient of the spring (432) in the corresponding fixed tube (42); a docking groove (532) for engaging with a ball (442) is provided on one end of the outer surface of the docking tube (531) close to the corresponding fixed tube (42); a tapered sleeve (533) for elastically engaging with the corresponding rubber hose (52) is fixedly arranged on one end of the docking tube (531) away from the corresponding fixed tube (42); and a clamping groove (534) is provided on the outer surface of the tapered sleeve (533).

8. A sulfonic acid processing sulfonation tail gas detection sampling device according to claim 7, characterized in that: The sealing assembly (54) comprises a sealing clamp (541), a sealing ring (542) and a docking plate (543); the sealing clamps (541) are symmetrically arranged on the conical sleeve (533) in an anterior-posterior symmetrical manner; the left ends of the symmetrical sealing clamps (541) are rotatably connected via a hinge seat; the opposite sides of the symmetrical sealing clamps (541) are fixedly provided with sealing rings (542) that are snap-fitted with the corresponding clamping grooves (534); the right ends of the symmetrical sealing clamps (541) are fixedly provided with a docking plate (543); the symmetrical docking plates (543) are fixedly connected via bolts.

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