An acid gas detection device

Abstract

The application discloses an acidic gas detection device, which comprises a detection mechanism, a detection reagent for detecting acidic gas is arranged in the detection mechanism, the detection mechanism comprises a detection container, a gas inlet pipe for introducing detection gas into the detection container is arranged on one side of the detection container, a gas outlet pipe for discharging reaction detection gas is arranged on the other side of the detection container, a collection assembly is used for collecting precipitate and detection reagent waste liquid, the collection assembly is communicated with the detection mechanism, a liquid supplementing assembly is used for supplementing the detection reagent in the detection mechanism, and the liquid supplementing assembly is communicated with the detection mechanism. The detection reagent can react with the gas introduced into the detection container to generate precipitate by the cooperation of the detection container, the liquid supplementing assembly, an observation assembly and the collection assembly, so that whether there is precipitate can be observed through the observation assembly, the gas detection result can be obtained, and acidic substances in the gas can be removed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acid gas detection, in particular to an acid gas detection device. BACKGROUND

[0002] Volatile H2S and CO2 gas is a common acid gas in natural gas exploitation, which can cause corrosion, degradation of metal structures such as valves and pipelines, and other environmental factors, thereby exacerbating the damage to equipment and affecting the service life of the equipment.

[0003] At present, the detection of acid gas in the industry is based on instrument gas determination method and sampling determination method, but both methods have their own shortcomings:

[0004] The accuracy of the gas instrument detection device in the pipeline is relative, for example, the relative standard error of the hydrogen sulfide detection tube is 5-10%, and the relative standard error of sulfur dioxide is 10-15%, which cannot be accurately measured, and the gas instrument detection device cannot remove the acidic substances in the exhaust gas, and the exhaust gas will pollute the air;

[0005] Although the sampling determination method is accurate, it is dangerous to directly sample in a high-pressure environment, and it cannot detect acid gas in real time. SUMMARY

[0006] The purpose of the present application is to provide an acid gas detection device to solve the problems raised in the background art.

[0007] To achieve the above purpose, the present application provides the following technical scheme: an acid gas detection device, comprising:

[0008] A detection mechanism is provided inside the detection mechanism for detecting acid gas reagent for detecting acid gas;

[0009] The detection mechanism includes a detection container, one side of the detection container is provided with a gas inlet pipe for introducing detection gas into the detection container, and the other side of the detection container is provided with a gas outlet pipe for discharging the detection gas after reaction;

[0010] A collection assembly is used to collect precipitates and reagent waste liquid, and the collection assembly is connected with the detection mechanism;

[0011] A liquid supplementing assembly is used to supplement the reagent in the detection mechanism, and the liquid supplementing assembly is connected with the detection mechanism.

[0012] Preferably, the detection mechanism comprises:

[0013] A liquid level detector is installed on the detection container, and is used to check the liquid level of the detection reagent inside the detection container.

[0014] A sedimentation tube is used to discharge the sediments and the waste liquid of the detection reagent from the detection container, and is connected to the bottom of the detection container.

[0015] A heat exchange tube has an outer wall fixedly connected to the detection container.

[0016] A first three-way pipe fitting is installed at the bottom of the sedimentation tube, and an end thereof is connected to the collection assembly.

[0017] An exhaust assembly is arranged inside the detection container, and is used to discharge the detection gas towards the inside of the detection reagent.

[0018] Preferably, the application further comprises:

[0019] An observation assembly is arranged at the bottom of the detection container, and is used to observe the content of the detection sediments, and comprises:

[0020] A sight glass is installed at an end of the first three-way pipe fitting through a flange collar, and is used to observe the sediments falling from the sedimentation tube.

[0021] Preferably, the collection assembly comprises:

[0022] A liquid collecting tank is connected to the bottom of one side of the detection container through a first connecting pipe.

[0023] A first pressure reducing valve and a first ball valve are both installed on the first connecting pipe, and the first ball valve is located between the first pressure reducing valve and the liquid collecting tank.

[0024] Preferably, the collection assembly further comprises:

[0025] A recovery pipe is installed on one side of the liquid collecting tank, and is used to recover the waste liquid of the detection reagent.

[0026] A second three-way pipe fitting and a safety valve are installed between the second three-way pipe fitting and the liquid collecting tank through the first connecting pipe.

[0027] A third three-way pipe fitting is installed on the recovery pipe, and is connected to the second three-way pipe fitting through the first connecting pipe.

[0028] A second ball valve is installed on the recovery pipe, and is located between the third three-way pipe fitting and the liquid collecting tank.

[0029] Preferably, the liquid supplement assembly comprises:

[0030] a liquid supplement tank arranged at the top side of the detection container;

[0031] a liquid outlet pipe fixedly arranged between the liquid supplement tank and the detection container;

[0032] a solenoid valve arranged on the liquid outlet pipe;

[0033] an air pipe arranged between the liquid supplement tank and the detection container, the liquid supplement tank, the detection container, the liquid outlet pipe and the air pipe forming a ring-shaped channel;

[0034] a third ball valve arranged on the air pipe;

[0035] a pressure gauge arranged on the liquid supplement tank, the pressure gauge being used to detect the pressure inside the liquid supplement tank.

[0036] Preferably, the liquid supplement assembly further comprises:

[0037] a liquid injection pipe arranged at the top side of the liquid supplement tank;

[0038] a blind plate arranged at one end of the liquid injection pipe;

[0039] a check valve arranged on the liquid injection pipe;

[0040] a second connecting pipe arranged at the top side of the liquid supplement tank, the second connecting pipe being used to discharge the waste gas inside the liquid supplement tank to a flare main pipe;

[0041] a second pressure reducing valve and a fourth ball valve, both arranged on the second connecting pipe, the second pressure reducing valve being located between the fourth ball valve and the liquid supplement tank.

[0042] Preferably, the gas exhaust assembly comprises:

[0043] a connecting housing rotatably sleeved on the end of the air inlet pipe;

[0044] a gas exhaust pipe arranged in a ring-shaped array on the outside of the connecting housing, the gas exhaust pipe being located inside the detection reagent;

[0045] a gas exhaust hole obliquely downwardly arranged on the outside of the gas exhaust pipe.

[0046] Preferably, the gas exhaust assembly further comprises:

[0047] a sealing sleeve sleeved between the connecting housing and the air inlet pipe;

[0048] The first ring is fixedly installed outside the air inlet pipe and is located at the top of the sealing sleeve.

[0049] The second ring is fixedly installed outside the air inlet pipe and is located at the bottom of the sealing sleeve.

[0050] The planar bearing is sleeved outside the air inlet pipe and is located between the second ring and the sealing sleeve.

[0051] Preferably, the anti-siphon assembly comprises:

[0052] The sealing plug is arranged inside the connecting shell, and the outer wall of the sealing plug is sleeved with the air inlet pipe.

[0053] The connecting piece is fixedly connected to the side of the sealing plug.

[0054] The fixed rod is fixedly connected to one end of the second ring, and the outer wall of the fixed rod is sleeved with the connecting piece in a sliding manner.

[0055] The limiting block is fixedly connected to the bottom of the fixed rod.

[0056] The supporting spring is sleeved outside the fixed rod in a sliding manner, and is located between the limiting block and the connecting piece.

[0057] The technical effects and advantages of the present application are as follows:

[0058] (1) The present application utilizes the cooperation of the detection container, the detection reagent, the liquid supplementing assembly, the observation assembly and the collection assembly. The detection reagent can react with the gas entering the inside of the detection container to generate precipitates. Whether there are precipitates can be observed through the observation assembly, so that the gas detection result can be obtained. Acidic substances in the gas can be removed, the pipeline is prevented from being corroded by the gas, and the service life of the equipment is prolonged.

[0059] (2) The present application utilizes the cooperation of the detection container, the detection reagent and the exhaust assembly. The exhaust assembly comprises a connecting shell, an exhaust pipe and an anti-siphon assembly. When the detection gas is discharged through the exhaust hole of the exhaust pipe, the connecting shell can be driven to rotate, so that the detection reagent is stirred, the reaction efficiency of the detection reagent and the acidic substances in the gas is improved, and when the air inlet pipe stops injecting gas into the inside of the detection container, the anti-siphon assembly can prevent the detection container in the inside of the detection container from flowing back into the air inlet pipe. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0061] Figure 2Front view of the detection container of the application.

[0062] Figure 3 Front view of the detection container of the application.

[0063] Figure 4 Front view of the detection container of the application.

[0064] Figure 5 Front view of the detection container of the application.

[0065] Figure 6 Front view of the detection container of the application.

[0066] Figure 7 Front view of the detection container of the application.

[0067] Figure 8 Front view of the detection container of the application.

[0068] Figure: 1, detection container; 2, liquid level detector; 3, heat exchange pipe; 4, sight glass; 5, first three-way pipe fitting; 6, first pressure reducing valve; 7, first ball valve; 8, liquid collection tank; 9, safety valve; 10, second three-way pipe fitting; 11, second ball valve; 12, third three-way pipe fitting; 13, third ball valve; 14, liquid supplement tank; 15, electromagnetic valve; 16, pressure gauge; 17, blind plate; 18, check valve; 19, second pressure reducing valve; 20, fourth ball valve; 101, air inlet pipe; 102, air outlet pipe; 104, sedimentation pipe; 105, air vent pipe; 106, liquid outlet pipe; 107, exhaust assembly; 171, connecting shell; 172, exhaust pipe; 173, exhaust hole; 174, anti-siphon assembly; 1741, sealing plug; 1742, connecting piece; 1743, fixed rod; 1744, limiting block; 1745, supporting spring; 175, sealing shaft sleeve; 176, first collar; 177, second collar; 178, flat bearing. DETAILED DESCRIPTION

[0069] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0070] Embodiment 1

[0071] The application provides a liquid supplement device as described above. Figures 1-7The acid gas detection device shown includes a detection mechanism, a collection assembly and a liquid supplementing assembly. The detection mechanism is internally provided with a detection reagent for detecting acid gas. The detection reagent is used to react with the acid gas entering the inside of the detection mechanism to generate precipitates. The detection mechanism includes a detection container 1, i.e. the detection reagent is stored in the inside of the detection container 1, and the bottom of the detection container 1 is funnel-shaped so as to facilitate the discharge of the precipitates generated by the reaction from the bottom of the detection container 1. One side of the detection container 1 is provided with a gas inlet pipe 101 for introducing detection gas into the inside of the detection container 1. The other side of the detection container 1 is provided with a gas outlet pipe 102 for discharging the detection gas after the reaction. The detection reagent is a mixed solution composed of copper hydroxide, barium hydroxide and potassium permanganate. Since the acid gas commonly contains volatile H2S and CO2 in natural gas exploitation, the potassium permanganate reacts with H2S to generate sulfur precipitates, the barium hydroxide reacts with CO2 to generate barium carbonate precipitates, and the potassium permanganate does not react with the barium hydroxide. Subsequently, NaOH can be added to the detection reagent waste liquid to react and remove the sulfur precipitates, so as to reduce the subsequent waste liquid reaction, reuse the detection reagent, collect the precipitates and the detection reagent waste liquid by the collection assembly, and supplement the detection reagent into the inside of the detection mechanism by the liquid supplementing assembly, so as to continuously detect the acid gas.

[0072] Further, the detection mechanism includes a liquid level detector 2, a sedimentation pipe 104, a heat exchange pipe 3, a first three-way pipe fitting 5, and an exhaust assembly 107. The liquid level detector 2 is installed on the detection container 1 and is used to check the liquid level of the detection reagent inside the detection container 1. The outer wall of the heat exchange pipe 3 is fixedly connected to the detection container 1. The liquid level detector 2 is a static pressure type liquid level detector, which calculates the liquid level by measuring the liquid static pressure. The sedimentation pipe 104 is used to discharge the sediment and waste liquid of the detection reagent from the detection container 1 and is connected to the bottom of the detection container 1. The heat exchange pipe 3 can pass through high-temperature oil liquid to heat the mixed liquid of the detection reagent inside the detection container 1. Since the gas after natural gas dry and wet desulfurization and decarbonization contains a certain amount of moisture, the liquid level in the detection container 1 will increase over time. When the liquid level is higher than the highest value set by the liquid level detector 2, the liquid level detector 2 will issue an alarm and make the heat exchange pipe 3 work to heat the inside of the detection container 1. The heat conduction oil in the heat exchange pipe 3 will heat the liquid inside the detection container 1 to speed up the evaporation of the liquid until the liquid level is lowered to the lowest set liquid level. The heating of the liquid inside the detection container 1 by the heat exchange pipe 3 is stopped. The first three-way pipe fitting 5 is installed at the bottom of the sedimentation pipe 104. The end of the first three-way pipe fitting 5 is connected to the collection assembly. The exhaust assembly 107 is arranged inside the detection container 1 and is used to discharge the detection gas towards the inside of the detection reagent and discharge it into the detection reagent through the exhaust assembly 107 to make the detection reagent react with the acidic substances in the gas to be detected. The gas outlet pipe 102 is installed at the top of one side of the detection container 1 as shown in FIG. 8. The unreacted gas flows out from the B direction of the gas outlet pipe 102. Figure 2

[0073] In particular, the observation assembly is arranged at the bottom of the detection container 1 and is used to observe the content of the sediment, i.e., to observe the sulfur and barium carbonate precipitates, to determine whether the detection gas contains acidic substances and to remove the acidic substances by reaction, thereby improving the environmental protection of the detection of acidic gas. The observation assembly includes a sight glass 4 and a flange sleeve. The sight glass 4 is installed at the end of the first three-way pipe fitting 5 through the flange sleeve. The sight glass 4 is used to observe the sediment falling from the sedimentation pipe 104. The falling sediment from the sedimentation pipe 104 can be directly observed through the sight glass 4 or can be photographed and identified through a camera.

[0074] Further, the collection assembly includes a liquid collection tank 8, a first connecting pipe, a first pressure reducing valve 6, and a first ball valve 7. The liquid collection tank 8 is connected to the bottom of one side of the detection container 1 through the first connecting pipe. The first pressure reducing valve 6 and the first ball valve 7 are both installed on the first connecting pipe. The first ball valve 7 is located between the first pressure reducing valve 6 and the liquid collection tank 8. The sediment can be directly observed through the sight glass 4. When the sediment is more, the first ball valve 7 can be opened. The mixed liquid and sediment inside the detection container 1 will flow along the first connecting pipe under the action of pressure and gravity.​Figure 2 In the direction of C-D, the discharge from the first tee 5 passes through the first pressure reducing valve 6 and the first ball valve 7 into the liquid collection tank 8. The collection assembly further comprises a recovery pipe, a second tee 10, a safety valve 9, a third tee 12 and a second ball valve 11. The recovery pipe is installed on one side of the liquid collection tank 8 and is used to recover the waste liquid of the detection reagent. The safety valve 9 is installed between the second tee 10 and the liquid collection tank 8 through a first connecting pipe. The third tee 12 is installed on the recovery pipe and is connected to the second tee 10 through a first connecting pipe. The second ball valve 11 is installed on the recovery pipe and is located between the third tee 12 and the liquid collection tank 8. The second tee 10 is connected to the flare main, as shown in FIG. 4. When the pressure is too high, the gas in the liquid collection tank 8 overflows from the safety valve 9 and the second tee 10 in the direction of F to the flare main for combustion treatment of the unreacted acid gas. When a certain amount of solvent is collected in the liquid collection tank 8, the second ball valve 11 can be gently opened to flow out, and the composition of the precipitate is detected and the new detection solvent is recovered for preparation, as shown in FIG. 5. Figure 2 When a certain amount of solvent is collected in the liquid collection tank 8, the second ball valve 11 can be gently opened to flow out, and the composition of the precipitate is detected and the new detection solvent is recovered for preparation, as shown in FIG. 5. Figure 2 As shown in FIG. 6, part of the residual gas in the liquid collection tank 8 goes to the flare main in the direction of H.

[0075] Further, the liquid supplement assembly comprises a liquid supplement tank 14, a liquid outlet pipe 106, an electromagnetic valve 15, a vent pipe 105, a third ball valve 13 and a pressure gauge 16. The liquid supplement tank 14 is arranged on the top of the side of the detection container 1. The liquid outlet pipe 106 is fixedly installed between the liquid supplement tank 14 and the detection container 1. The electromagnetic valve 15 is installed on the liquid outlet pipe 106. The vent pipe 105 is installed between the liquid supplement tank 14 and the detection container 1. The third ball valve 13 is installed on the vent pipe 105. The liquid supplement tank 14, the detection container 1, the liquid outlet pipe 106 and the vent pipe 105 form a ring-shaped channel, so that the detection reagent in the liquid supplement tank 14 enters the detection container 1 through the ring-shaped channel, and the gas in the detection container 1 enters the liquid supplement tank 14 through the ring-shaped channel, thereby balancing the pressure in the liquid supplement tank 14 and the detection container 1 during liquid supplement. After the mixed liquid in the detection container 1 is emptied, the first ball valve 7 is closed, and the third ball valve 13 and the electromagnetic valve 15 are opened, so that the detection reagent in the liquid supplement tank 14 flows out of the liquid supplement tank 14 and flows into the detection container 1 in the direction of J under the dual action of pressure and gravity. The gas in the detection container 1 flows into the liquid supplement tank 14 in the direction of K, as shown in FIG. 7, until the liquid level meets the minimum requirement set by the liquid level detector 2. At this time, the third ball valve 13 and the electromagnetic valve 15 are closed, and the liquid supplement of the detection container 1 is completed. The pressure gauge 16 is installed on the liquid supplement tank 14 and is used to detect the pressure in the liquid supplement tank 14. Figure 3

[0076] ​Furthermore, the replenishment assembly also includes an injection pipe, a blind flange 17, a check valve 18, a second connecting pipe, a second pressure reducing valve 19, and a fourth ball valve 20. The injection pipe is installed on the top of the replenishment tank 14, the blind flange 17 is installed at one end of the injection pipe, the check valve 18 is installed on the injection pipe, and the second connecting pipe is installed on the top side of the replenishment tank 14. The second connecting pipe is used to discharge the exhaust gas inside the replenishment tank 14 to the flare main. The second pressure reducing valve 19 and the fourth ball valve 20 are both installed on the second connecting pipe. The second pressure reducing valve 19 is located between the fourth ball valve 20 and the replenishment tank 14. When the liquid level in the replenishment tank 14 is insufficient, the fourth ball valve 20 is opened. Figure 4 At any time, the gas inside the replenishment tank 14 is discharged outward along the L direction, passing through the second pressure reducing valve 19 and the fourth ball valve 20 to the flare main. When the pressure gauge 16 remains unchanged, open the blind flange 17 and close the fourth ball valve 20 to add solution from the outside. When the solution rises to the set liquid level, stop adding solution. Purge helium gas from the location of the blind flange 17 and gradually close the second ball valve 11 to seal the blind flange 17. Observe the change in pressure gauge 16. If the value does not change much for a long time, it indicates that the blind flange 17 is well sealed. If it shows a downward trend or is very close to atmospheric pressure, check the sealing condition of the blind flange 17.

[0077] Example 2

[0078] Based on Example 1, such as Figure 8 As shown, the exhaust assembly 107 includes a connecting housing 171, an exhaust pipe 172, and an exhaust port 173. The connecting housing 171 is rotatably sleeved on the end of the inlet pipe 101. The exhaust pipes 172 are arranged in a ring array on the outside of the connecting housing 171. High-pressure gas introduced through the inlet pipe 101 enters the interior of the connecting housing 171. The exhaust pipes 172 are located inside the test reagent. The exhaust ports 173 are inclined downwards and opened on the outside of the exhaust pipes 172. High-pressure gas inside the connecting housing 171 is discharged into the test reagent through the exhaust ports 173 on the multiple exhaust pipes 172, thereby providing a reverse push to the connecting exhaust pipes 172. The force causes the exhaust pipe 172 to rotate relative to the inlet pipe 101, thereby the exhaust pipe 172 outside the connecting housing 171 can also agitate the test reagent, thereby accelerating the reaction efficiency between the test reagent and the gas to be tested. The density of the multiple exhaust holes 173 outside the exhaust pipe 172 gradually increases along the direction away from the center of the connecting housing 171. Since the circumference of the exhaust pipe 172 at different positions is different when the exhaust pipe 172 rotates with the connecting housing 171 relative to the inlet pipe 101, the density of the exhaust holes 173 gradually increases in the direction away from the center of the connecting housing 171, which can improve the uniformity of the gas to be tested entering the test reagent.

[0079] Further, the exhaust assembly 107 further comprises a sealing sleeve 175, a first collar 176, a second collar 177 and a flat bearing 178, the sealing sleeve 175 is sleeved between the connecting shell 171 and the air inlet pipe 101, the sealing sleeve 175 can improve the sealing between the connecting shell 171 and the air inlet pipe 101, the first collar 176 is fixedly installed outside the air inlet pipe 101, the first collar 176 is located at the top of the sealing sleeve 175, and a bolt can be further installed on the first collar 176, so that the bolt locks the connecting shell 171, so that the plurality of exhaust pipes 172 are in a static state of exhaust, the second collar 177 is fixedly installed outside the air inlet pipe 101, the second collar 177 is located at the bottom of the sealing sleeve 175, the flat bearing 178 is sleeved outside the air inlet pipe 101, and the flat bearing 178 is located between the second collar 177 and the sealing sleeve 175, the first collar 176 and the second collar 177 can limit the connecting shell 171, and the flat bearing 178 can reduce the friction force received by the connecting shell 171 during rotation.

[0080] Further, the anti-siphon assembly 174 comprises a sealing plug 1741, a connecting piece 1742, a fixed rod 1743, a limiting block 1744 and a supporting spring 1745, the sealing plug 1741 is arranged inside the connecting shell 171, and the outer wall of the sealing plug 1741 is sleeved with the air inlet pipe 101; when the air inlet pipe 101 discharges gas, the gas can extrude the sealing plug 1741 to separate from the air inlet pipe 101, so that the air inlet pipe 101 discharges gas to the inside of the connecting shell 171; the connecting piece 1742 is fixedly connected to the side of the sealing plug 1741; one end of the fixed rod 1743 is fixedly connected with the second collar 177, and the outer wall of the fixed rod 1743 is slidably sleeved with the connecting piece 1742; the limiting block 1744 is fixedly connected to the bottom of the fixed rod 1743; the supporting spring 1745 is slidably sleeved outside the fixed rod 1743, and the supporting spring 1745 is located between the limiting block 1744 and the connecting piece 1742; the supporting spring 1745 can provide the sealing plug 1741 with a spring force towards the air inlet pipe 101 through the connecting piece 1742, so that when the air inlet pipe 101 no longer discharges gas, the sealing plug 1741 can seal the air inlet pipe 101, thereby protecting the air inlet pipe 101 from siphoning.

[0081] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An acid gas detection device, characterized in that, include: The testing facility is equipped with testing reagents for detecting acidic gases. The detection mechanism includes a detection container (1) and an exhaust assembly (107). One side of the detection container (1) is provided with an inlet pipe (101) for introducing detection gas into the container (1), and the other side of the detection container (1) is provided with an outlet pipe (102) for discharging the detection gas after the reaction. The exhaust assembly (107) is located inside the detection container (1) and is used to discharge detection gas into the detection reagent. The exhaust assembly (107) includes: A connecting housing (171) is rotatably sleeved on the end of the air intake pipe (101); An exhaust pipe (172) is installed in a ring array on the outside of the connecting housing (171), and the exhaust pipe (172) is located inside the detection reagent; An exhaust port (173) is provided at an angle downwards on the outside of the exhaust pipe (172); An anti-siphon assembly (174) is provided at the outlet end of the air inlet pipe (101); A collection component for collecting precipitates and waste liquid from testing reagents, the collection component being connected to a testing facility; A replenishment component is used to replenish the testing reagents inside the testing facility, and the replenishment component is connected to the testing facility.

2. The acid gas detection device according to claim 1, characterized in that, The testing institution also includes: A liquid level detector (2) is installed on the detection container (1) and is used to check the liquid level of the detection reagent inside the detection container (1). Heat exchange tube (3), the outer wall of which is fixedly connected to the detection container (1); A sedimentation tube (104) is used to detect the discharge of sediment and test reagent waste liquid from the test container (1), and the sedimentation tube (104) is connected to the bottom of the test container (1); The first tee fitting (5) is installed at the bottom of the sedimentation tube (104), and the end of the first tee fitting (5) is connected to the collection assembly.

3. The acid gas detection device according to claim 2, characterized in that, Also includes: An observation component is disposed at the bottom of the detection container (1) and is used to observe the content of the precipitate. The observation component includes: Sight glass (4) and flange ring, wherein the sight glass (4) is installed at the end of the first tee fitting (5) via the flange ring, and the sight glass (4) is used to observe the sediment falling from the sedimentation tube (104).

4. The acid gas detection device according to claim 3, characterized in that, The collection component includes: The liquid collection tank (8) and the first connecting pipe are connected to the bottom of the detection container (1) on one side through the first connecting pipe; The first pressure reducing valve (6) and the first ball valve (7) are both installed on the first connecting pipe. The first ball valve (7) is located between the first pressure reducing valve (6) and the liquid collection tank (8).

5. The acid gas detection device according to claim 4, characterized in that, The collection component also includes: A recovery tube is installed on one side of the collection tank (8) and is used to recover waste liquid from the test reagents. The second tee fitting (10) and the safety valve (9) are connected between the second tee fitting (10) and the liquid collection tank (8) via the first connecting pipe. The third tee fitting (12) is installed on the recovery pipe and is connected to the second tee fitting (10) through the first connecting pipe. The second ball valve (11) is installed on the recovery pipe and is located between the third tee fitting (12) and the collection tank (8).

6. The acid gas detection device according to claim 2, characterized in that, The fluid replenishment component includes: A replenishment tank (14) is disposed on top of the detection container (1); The liquid outlet pipe (106) is fixedly installed between the liquid replenishment tank (14) and the detection container (1); Solenoid valve (15), said solenoid valve (15) is installed on the liquid outlet pipe (106); A vent pipe (105) is installed between the replenishment tank (14) and the detection container (1), and the replenishment tank (14), the detection container (1), the outlet pipe (106) and the vent pipe (105) form an annular channel; The third ball valve (13) is installed on the vent pipe (105); Pressure gauge (16) is installed on replenishment tank (14) and is used to detect the internal pressure of replenishment tank (14).

7. The acid gas detection device according to claim 6, characterized in that, The fluid replenishment assembly also includes: Injection pipe, which is installed on top of replenishment tank (14); Blind plate (17), said blind plate (17) is installed at one end of the injection tube; Check valve (18), which is installed on the injection pipe; The second connecting pipe is installed on the top of the side of the replenishment tank (14) and is used to discharge the exhaust gas inside the replenishment tank (14) to the flare main pipe. The second pressure reducing valve (19) and the fourth ball valve (20) are both installed on the second connecting pipe. The second pressure reducing valve (19) is located between the fourth ball valve (20) and the replenishment tank (14).

8. The acid gas detection device according to claim 1, characterized in that, The exhaust assembly (107) also includes: A sealing bushing (175) is fitted between the connecting housing (171) and the air intake pipe (101); The first collar (176) is fixedly installed on the outside of the intake pipe (101) and is located on the top of the sealing bushing (175). The second collar (177) is fixedly installed on the outside of the intake pipe (101) and is located at the bottom of the sealing bushing (175); A planar bearing (178) is fitted onto the outside of the intake pipe (101) and is located between the second collar (177) and the sealing bushing (175).

9. An acidic gas detection device according to claim 8, characterized in that, The anti-siphon component (174) includes: A sealing plug (1741) is disposed inside the connecting housing (171), and the outer wall of the sealing plug (1741) is sleeved with the air intake pipe (101); A connector (1742) is fixedly connected to the side of the sealing plug (1741); A fixing rod (1743) is fixedly connected at one end to a second collar (177), and the outer wall of the fixing rod (1743) is slidably inserted into the connecting piece (1742). A limiting block (1744) is fixedly connected to the bottom of a fixing rod (1743); A support spring (1745) is slidably sleeved on the outside of a fixed rod (1743) and is located between a limiting block (1744) and a connecting piece (1742).

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