Impurity separation equipment for output gas detection

Abstract

The invention provides impurity separation equipment for output gas detection, and the impurity separation equipment for output gas detection comprises a regulation and control device, the upstream end of the regulation and control device is communicated with a gas transmission main pipeline, and the regulation and control device is used for regulating the flow of gas entering a buffer device; the downstream end of the regulation and control device communicates with the upstream end of the buffer device, and the buffer device is used for achieving preliminary gas-liquid separation; the upstream end of the sand filling device communicates with the downstream end of the buffer device, and the sand filling device is used for separating suspended solids; the upstream end of the dehumidification device communicates with the downstream end of the sand filling device; and the gas flow monitoring equipment is communicated with the downstream of the dehumidification device so as to realize online gas flow measurement. The problem that in the prior art, impurity separation equipment is poor in separation efficiency is solved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and natural gas exploration and development, and in particular to an impurity separation device for output gas detection. Background Art

[0002] Fire drive is a heavy oil thermal recovery technology that continuously injects air and ignites the oil layer to burn 10% of the difficult-to-recover heavy components, producing high-temperature modification, combustion flue gas and water vapor multiple displacement effects. It has the advantages of a wide range of applications, high thermal efficiency and low cost.

[0003] During the development of fire drive, production wells continuously produce a large amount of flue gas with complex components and diverse properties. Accurate detection and analysis of the output gas / flue gas can provide an important basis for fire drive production regulation and the formulation of safety and environmental protection measures. In addition to nitrogen, oxygen, methane, carbon monoxide, carbon dioxide and other gases, the output gas of fire drive usually contains a large amount of water, foam oil, condensate oil and solid microparticles, which can easily cause problems such as clogging of on-site gathering and transportation pipeline filters and reduced efficiency of air compressors. In addition, it is impossible to directly and effectively detect it using existing gas chromatography analysis methods. Therefore, it is necessary to conduct preliminary separation, enrichment and purification of the output gas / flue gas before detection.

[0004] At present, the commonly used fire drive output gas / flue gas separation technologies mainly include wet water washing separation technology and cyclone separator separation technology. Among them, the wet water washing separation technology mainly performs suspension separation on solid impurities in the output gas / flue gas, and the separation efficiency is poor. In addition, the acidic gas produced will corrode the pipeline after dissolving in water, polluting the environment.

[0005] That is to say, the impurity separation equipment in the prior art has the problem of poor separation efficiency. Summary of the invention

[0006] The main purpose of the present invention is to provide an impurity separation device for output gas detection, so as to solve the problem of poor separation efficiency of impurity separation devices in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present invention provides an impurity separation device for output gas detection, comprising: a control device, the upstream end of the control device is connected to the gas transmission main line, and the control device is used to adjust the gas flow entering the buffer device; a buffer device, the downstream end of the control device is connected to the upstream end of the buffer device, and the buffer device is used to achieve preliminary gas-liquid separation; a sand filling device, the upstream end of the sand filling device is connected to the downstream end of the buffer device, and the sand filling device is used to separate suspended matter; a dehumidification device, the upstream end of the dehumidification device is connected to the downstream end of the sand filling device; a gas flow monitoring device, the gas flow monitoring device is connected to the downstream of the dehumidification device to achieve online gas flow measurement.

[0008] Furthermore, the buffer device includes: a buffer tank, the buffer tank includes a buffer space and a buffer inlet, a first buffer outlet and a second buffer outlet connected to the buffer space, the gas flowing out of the control device enters the buffer space through the buffer inlet, the first buffer outlet is connected to the sand filling device, and the first buffer outlet is located above the second buffer outlet; a buffer liquid collecting cup, the buffer liquid collecting cup is connected to the second buffer outlet to collect the liquid after the preliminary gas-liquid separation.

[0009] Furthermore, the second buffer outlet is located below the buffer inlet, and the first buffer outlet is located above the buffer inlet.

[0010] Furthermore, the buffer tank also includes a flow bypass plate, which is arranged in the buffer space, the buffer inlet is located below the flow bypass plate, and the first buffer outlet is located above the flow bypass plate.

[0011] Furthermore, the sand filling device includes a plurality of sand filling assemblies, and the plurality of sand filling assemblies are connected in parallel.

[0012] Furthermore, the sand filling component includes: a sand filling tank, which includes a filling space, a filling inlet connected to the filling space, a first filling outlet and a second filling outlet, the gas flowing out through the buffer device enters the filling space through the filling inlet, the first filling outlet is connected to the dehumidification device, and the first filling outlet is located above the second filling outlet; a sand filling liquid collecting cup, which is connected to the second filling outlet to collect impurities separated by the sand filling tank.

[0013] Furthermore, the sand filling tank also includes a filler assembly for absorbing suspended matter, the filler assembly is arranged in the filler space, the filler inlet is located below the filler assembly, and the first filler outlet is located above the filler assembly.

[0014] Furthermore, the filler assembly comprises: two partitions, the two partitions are arranged at an interval, the partitions are in contact with the inner wall of the sand filling tank, and the filler layer is located between the two partitions.

[0015] Furthermore, the sand filling tank also includes a filler cleaning liquid inlet, and the filler cleaning liquid inlet is located at the top of the sand filling tank.

[0016] Furthermore, the dehumidification device includes a plurality of dehumidification components, and the plurality of dehumidification components are connected in parallel.

[0017] Furthermore, the dehumidification component includes: a dehumidification tank, the dehumidification tank includes a dehumidification space, a dehumidification inlet connected to the dehumidification space, a first dehumidification outlet and a second dehumidification outlet, the gas flowing out through the sand filling device enters the dehumidification space through the dehumidification inlet, the first dehumidification outlet is connected to the gas flow monitoring equipment, and the first dehumidification outlet is located above the second dehumidification outlet; a dehumidification liquid collecting cup, the dehumidification liquid collecting cup is connected to the second dehumidification outlet to collect the liquid separated by the dehumidification tank.

[0018] Furthermore, the dehumidification tank also includes a moisture absorption component for absorbing moisture, the moisture absorption component is arranged in the dehumidification space, the dehumidification inlet is located below the moisture absorption component, and the first dehumidification outlet is located above the moisture absorption component.

[0019] Furthermore, the desiccant assembly comprises: two isolation plates, the two isolation plates are spaced apart, the isolation plates abut against the inner wall of the dehumidification tank, and a desiccant layer, the desiccant layer is located between the two isolation plates.

[0020] Furthermore, the dehumidification tank also includes a dehumidification and cleaning liquid inlet, which is located at the top of the dehumidification tank.

[0021] Furthermore, the control device includes: a transmission pipeline, both ends of which are respectively connected to the gas main line and the buffer device; a ball valve, which is arranged on the transmission pipeline; a pressure regulating valve, which is arranged on the transmission pipeline, and the ball valve is located between the pressure regulating valve and the gas main line.

[0022] By applying the technical solution of the present invention, the impurity separation equipment for output gas detection includes a control device, a buffer device, a sand filling device, a dehumidification device and a gas flow monitoring device. The upstream end of the control device is connected to the gas transmission main line, and the control device is used to adjust the gas flow entering the buffer device; the downstream end of the control device is connected to the upstream end of the buffer device, and the buffer device is used to achieve preliminary gas-liquid separation; the upstream end of the sand filling device is connected to the downstream end of the buffer device, and the sand filling device is used to separate suspended matter; the upstream end of the dehumidification device is connected to the downstream end of the sand filling device; the gas flow monitoring device is connected to the downstream end of the dehumidification device to achieve online gas flow measurement.

[0023] By providing a control device in the impurity separation equipment for output gas detection in the present application, the gas flow entering the rear can be adjusted to ensure the pressure balance in the rear. The buffer device is used to buffer the gas to achieve preliminary gas-liquid separation to reduce impurities in the gas. The sand filling device is used to adsorb suspended matter such as foam oil to achieve the effect of secondary separation. The dehumidification device is used to adsorb water vapor in the gas to measure the water content in the output gas, achieving the effect of tertiary separation. The impurity separation equipment for output gas detection in the present application realizes the functions of online output gas, flue gas, etc. impurity removal, dehumidification, flow stabilization, enrichment, etc., and provides technical support for the determination of impurity content in the output gas, water content testing, gas purification treatment, and detection and analysis, and at the same time provides ideas for large-scale on-site output gas processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1A schematic structural diagram of an impurity separation device for output gas detection according to an optional embodiment of the present invention is shown;

[0026] Figure 2 Shows Figure 1 Schematic diagram of the structure of the middle buffer tank;

[0027] Figure 3 Shows Figure 1 Schematic diagram of the structure of the middle-fill sand tank;

[0028] Figure 4 Shows Figure 1 Schematic diagram of the structure of the dehumidification tank.

[0029] The above drawings include the following reference numerals:

[0030] 10. Control device; 11. Transmission pipeline; 12. Ball valve; 13. Pressure regulating valve; 20. Gas transmission main pipeline; 30. Buffer device; 31. Buffer tank; 311. Buffer space; 312. Buffer inlet; 313. First buffer outlet; 314. Second buffer outlet; 315. Flow bypass plate; 32. Buffer liquid collecting cup; 40. Sand filling device; 50. Dehumidification device; 60. Gas flow monitoring equipment; 70. Sand filling assembly; 71. Sand filling tank; 711. Filling space; 712. Filling inlet mouth; 713, first filler outlet; 714, second filler outlet; 715, filler assembly; 716, partition; 717, filler layer; 718, filler cleaning liquid inlet; 72, sand filling liquid collecting cup; 80, dehumidification assembly; 81, dehumidification tank; 811, dehumidification space; 812, dehumidification inlet; 813, first dehumidification outlet; 814, second dehumidification outlet; 815, dehumidification assembly; 816, isolation plate; 817, dehumidification layer; 818, dehumidification cleaning liquid inlet; 82, dehumidification liquid collecting cup. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0033] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0034] In order to solve the problem of poor separation efficiency of impurity separation equipment in the prior art, the present invention provides an impurity separation equipment for output gas detection.

[0035] like Figures 1 to 4 As shown, the impurity separation equipment for output gas detection includes a control device 10, a buffer device 30, a sand filling device 40, a dehumidification device 50 and a gas flow monitoring device 60. The upstream end of the control device 10 is connected to the gas transmission main line 20, and the control device 10 is used to adjust the gas flow entering the buffer device 30; the downstream end of the control device 10 is connected to the upstream end of the buffer device 30, and the buffer device 30 is used to achieve preliminary gas-liquid separation; the upstream end of the sand filling device 40 is connected to the downstream end of the buffer device 30, and the sand filling device 40 is used to separate suspended matter; the upstream end of the dehumidification device 50 is connected to the downstream end of the sand filling device 40; the gas flow monitoring device 60 is connected to the downstream of the dehumidification device 50 to achieve online gas flow measurement.

[0036] By setting a control device 10 in the impurity separation equipment for output gas detection in the present application, the gas flow entering the rear can be adjusted to ensure the pressure balance in the rear. The buffer device 30 is used to buffer the gas to achieve preliminary gas-liquid separation to reduce impurities in the gas. The sand filling device 40 is used to adsorb suspended matter such as foam oil to achieve the effect of secondary separation. The dehumidification device 50 is used to adsorb water vapor in the gas to measure the water content in the output gas, achieving the effect of tertiary separation. The impurity separation equipment for output gas detection in the present application realizes the functions of online output gas, flue gas, etc. impurity removal, dehumidification, flow stabilization, enrichment, etc., provides technical support for the determination of impurity content in the output gas, water content testing, gas purification treatment and detection analysis, and provides ideas for large-scale on-site output gas processing.

[0037] like Figures 1 to 4As shown, the buffer device 30 includes a buffer tank 31 and a buffer liquid collecting cup 32. The buffer tank 31 includes a buffer space 311 and a buffer inlet 312, a first buffer outlet 313 and a second buffer outlet 314 connected to the buffer space 311. The gas flowing out of the control device 10 enters the buffer space 311 through the buffer inlet 312. The first buffer outlet 313 is connected to the sand filling device 40. The first buffer outlet 313 is located above the second buffer outlet 314. The buffer liquid collecting cup 32 is connected to the second buffer outlet 314 to collect the liquid after the preliminary gas-liquid separation. The gas flowing out of the control device 10 will enter the buffer space 311 through the buffer inlet 312. The gas will achieve preliminary gas-liquid separation in the buffer space 311. The separated gas will flow into the sand filling device 40 through the first buffer outlet 313, and the separated liquid will flow into the buffer liquid collecting cup 32 through the second buffer outlet 314. In this process, the macromolecular droplets and foamy oil are mainly physically settled and aggregated. The macromolecular droplets and foamy oil after gas-liquid separation flow from the buffer tank 31 into the buffer liquid collection cup 32, and oil-water analysis is performed on them.

[0038] Optionally, a valve is provided on the buffer pipeline connecting the buffer tank 31 and the buffer liquid collecting cup 32 .

[0039] Specifically, the second buffer outlet 314 is located below the buffer inlet 312, and the first buffer outlet 313 is located above the buffer inlet 312. This arrangement allows the gas and liquid to separate under physical factors such as gravity, the gas flows upward due to its light weight, and the liquid flows downward due to its heavy weight, which is conducive to the separated liquid flowing into the buffer liquid collection cup 32.

[0040] exist Figure 2 In the specific embodiment shown, the buffer tank 31 further includes a flow plate 315, which is disposed in the buffer space 311, the buffer inlet 312 is located below the flow plate 315, and the first buffer outlet 313 is located above the flow plate 315. The flow plate 315 is disposed to block the flowing gas, so that a portion of the heavy liquid is blocked by the flow plate 315, thereby causing the liquid to settle, thereby achieving gas-liquid separation under physical factors such as gravity and blocking force.

[0041] exist Figure 2 In the specific embodiment shown, there are multiple flow-around plates 315 , and the multiple flow-around plates 315 are spaced apart along the axis of the buffer tank 31 , and at least some of the flow-around plates 315 are spaced apart in the circumferential direction.

[0042] like Figure 1As shown, the sand filling device 40 includes a plurality of sand filling assemblies 70, and the plurality of sand filling assemblies 70 are connected in parallel. The sand filling device 40 is provided with a plurality of sand filling assemblies 70 arranged in parallel. When one of the sand filling assemblies 70 needs to be cleaned or replaced, other sand filling assemblies 70 can be used for purification, which is conducive to achieving uninterrupted purification processing.

[0043] like Figure 1 and Figure 3 As shown, the sand filling assembly 70 includes a sand filling tank 71 and a sand filling liquid collecting cup 72. The sand filling tank 71 includes a filling space 711, a filling inlet 712 connected to the filling space 711, a first filling outlet 713 and a second filling outlet 714. The gas flowing out of the buffer device 30 enters the filling space 711 through the filling inlet 712. The first filling outlet 713 is connected to the dehumidification device 50, and the first filling outlet 713 is located above the second filling outlet 714. The sand filling liquid collecting cup 72 is connected to the second filling outlet 714 to collect impurities separated by the sand filling tank 71. The gas flowing out of the buffer device 30 will enter the filling space 711 through the filling inlet 712. The gas separates suspended matter in the filling space 711. The separated gas flows into the dehumidification device 50 through the first filling outlet 713, and some of the separated impurities flow into the sand filling liquid collecting cup 72 through the second filling outlet 714. In this process, mainly solid impurities, foamy oil and other suspended matter are separated, and the separated suspended matter flows from the sand filling tank 71 into the sand filling liquid collecting cup 72, and its components are analyzed.

[0044] like Figure 3 As shown, the sand filling tank 71 further includes a packing assembly 715 for absorbing suspended matter, the packing assembly 715 is arranged in the packing space 711, the packing inlet 712 is located below the packing assembly 715, and the first packing outlet 713 is located above the packing assembly 715. Such an arrangement is conducive to the packing assembly 715 to separate the suspended matter in the gas, and the separated gas flows upward into the dehumidification device 50, and the separated suspended matter flows downward into the sand filling liquid collecting cup 72.

[0045] like Figure 3 As shown, the packing assembly 715 includes two partitions 716 and a packing layer 717. The two partitions 716 are arranged at intervals, the partitions 716 abut against the inner wall of the sand filling tank 71, and the packing layer 717 is located between the two partitions 716. The partition 716 is used to support and limit the packing layer 717 to prevent the packing layer 717 from falling, which is conducive to the stable operation of the packing assembly 715.

[0046] Optionally, the packing layer 717 is filled with quartz sand of 40-80 mesh.

[0047] like Figure 3As shown, the sand filling tank 71 further includes a filler cleaning liquid inlet 718, and the filler cleaning liquid inlet 718 is located at the top of the sand filling tank 71. When cleaning the sand filling tank 71, washing liquid is poured into the filler cleaning liquid inlet 718 to clean the sand filling tank 71.

[0048] like Figure 1 and Figure 4 As shown, the dehumidification device 50 includes a plurality of dehumidification components 80, and the plurality of dehumidification components 80 are connected in parallel. The dehumidification device 50 is provided with a plurality of dehumidification components 80 arranged in parallel. When one of the dehumidification components 80 needs to be cleaned or replaced, other dehumidification components 80 can be used for purification, which is conducive to achieving uninterrupted purification processing.

[0049] like Figure 1 and Figure 4 As shown, the dehumidification assembly 80 includes a dehumidification tank 81 and a dehumidification liquid collecting cup 82. The dehumidification tank 81 includes a dehumidification space 811, a dehumidification inlet 812 connected to the dehumidification space 811, a first dehumidification outlet 813 and a second dehumidification outlet 814. The gas flowing out of the sand filling device 40 enters the dehumidification space 811 through the dehumidification inlet 812. The first dehumidification outlet 813 is connected to the gas flow monitoring device 60. The first dehumidification outlet 813 is located above the second dehumidification outlet 814. The dehumidification liquid collecting cup 82 is connected to the second dehumidification outlet 814 to collect the liquid separated by the dehumidification tank 81. The gas flowing out of the sand filling device 40 will enter the dehumidification space 811 through the dehumidification inlet 812. The gas separates water in the dehumidification space 811. The separated gas flows into the gas flow monitoring device 60 through the first dehumidification outlet 813, and the separated water flows into the dehumidification liquid collecting cup 82 through the second dehumidification outlet 814. In this process, the moisture in the gas is mainly separated, and the separated water flows from the dehumidification tank 81 into the dehumidification liquid collecting cup 82 and is collected.

[0050] like Figure 4 As shown, the dehumidification tank 81 further includes a moisture absorption component 815 for absorbing moisture, the moisture absorption component 815 is arranged in the dehumidification space 811, the dehumidification inlet 812 is located below the moisture absorption component 815, and the first dehumidification outlet 813 is located above the moisture absorption component 815. This arrangement is conducive to the moisture absorption component 815 to absorb the moisture in the gas, and at the same time, the dehumidified gas flows upward into the gas flow monitoring device 60, and the separated moisture is absorbed by the moisture absorption component 815.

[0051] like Figure 4As shown, the moisture absorption component 815 includes two isolation plates 816 and a moisture absorption layer 817. The two isolation plates 816 are arranged at intervals, and the isolation plates 816 abut against the inner wall of the dehumidification tank 81. The moisture absorption layer 817 is located between the two isolation plates 816. The isolation plates 816 are used to support and limit the moisture absorption layer 817 to prevent the moisture absorption layer 817 from falling, which is conducive to the stable operation of the moisture absorption component 815.

[0052] Optionally, the hygroscopic layer 817 may be dehumidified using anhydrous calcium chloride (CaCl 2 ).

[0053] like Figure 4 As shown, the dehumidification tank 81 also includes a dehumidification cleaning liquid inlet 818, and the dehumidification cleaning liquid inlet 818 is located at the top of the dehumidification tank 81. When the dehumidification tank 81 is cleaned, the washing liquid is poured into the dehumidification cleaning liquid inlet 818 to clean the dehumidification tank 81.

[0054] like Figure 1 As shown, the control device 10 includes a transmission pipeline 11, a ball valve 12 and a pressure regulating valve 13. The two ends of the transmission pipeline 11 are respectively connected to the gas transmission main line 20 and the buffer device 30; the ball valve 12 is arranged on the transmission pipeline 11; the pressure regulating valve 13 is arranged on the transmission pipeline 11, and the ball valve 12 is located between the pressure regulating valve 13 and the gas transmission main line 20. The output gas or flue gas in the gas transmission main line 20 is adjusted to a suitable pressure through the ball valve 12, and then enters the buffer device 30 after the pressure is reduced to a suitable flow rate by the pressure regulating valve 13.

[0055] After entering the buffer device 30, the gas-liquid two-phase separation is initially carried out. This process mainly involves the physical sedimentation and aggregation of macromolecular droplets and foam oil. After the gas-liquid two-phase separation, the macromolecular droplets and foam oil flow into the buffer liquid collection cup 32 from the second buffer outlet 314. The separated liquid is collected and subjected to oil-water analysis.

[0056] The gas after gas-liquid phase separation is discharged from the first buffer outlet 313 into the sand filling tank 71 to separate suspended solids, foam oil and other suspended solids, collect the separated impurities and perform component analysis on them;

[0057] The dehumidification tank 81 uses anhydrous calcium chloride CaCl2 for dehumidification, and the water content in the gas can be calculated based on the change in mass.

[0058] By providing the buffer liquid collecting cup 32, the sand-filled liquid collecting cup 72 and the dehumidification liquid collecting cup 82, the separated matter can be collected regularly and tested and analyzed. The gas flow monitoring device 60 is connected downstream of the dehumidification tank 81 to realize online gas flow measurement.

[0059] Preferably, the gas flow monitoring device 60 is a rotor flow meter.

[0060] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0062] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An impurity separation device for output gas detection, characterized in that: include: A regulating device (10), wherein an upstream end of the regulating device (10) is connected to a gas transmission main line (20), and the regulating device (10) is used to regulate the gas flow entering the buffer device (30); A buffer device (30), wherein the downstream end of the regulating device (10) is in communication with the upstream end of the buffer device (30), and the buffer device (30) is used to achieve preliminary gas-liquid separation; a sand filling device (40), wherein the upstream end of the sand filling device (40) is connected to the downstream end of the buffer device (30), and the sand filling device (40) is used to separate suspended matter; a dehumidification device (50), wherein the upstream end of the dehumidification device (50) is connected to the downstream end of the sand filling device (40); A gas flow monitoring device (60) is connected to the downstream of the dehumidification device (50) to achieve online gas flow measurement.

2. The impurity separation device for output gas detection according to claim 1, characterized in that: The buffer device (30) comprises: A buffer tank (31), the buffer tank (31) comprising a buffer space (311) and a buffer inlet (312), a first buffer outlet (313) and a second buffer outlet (314) connected to the buffer space (311), the gas flowing out of the regulating device (10) enters the buffer space (311) through the buffer inlet (312), the first buffer outlet (313) is connected to the sand filling device (40), and the first buffer outlet (313) is located above the second buffer outlet (314); A buffer liquid collecting cup (32), wherein the buffer liquid collecting cup (32) is in communication with the second buffer outlet (314) to collect liquid after preliminary gas-liquid separation.

3. The impurity separation device for output gas detection according to claim 2, characterized in that: The second buffer outlet (314) is located below the buffer inlet (312), and the first buffer outlet (313) is located above the buffer inlet (312).

4. The impurity separation device for output gas detection according to claim 2, characterized in that: The buffer tank (31) further comprises a flow bypass plate (315), wherein the flow bypass plate (315) is arranged in the buffer space (311), the buffer inlet (312) is located below the flow bypass plate (315), and the first buffer outlet (313) is located above the flow bypass plate (315).

5. The impurity separation device for output gas detection according to claim 1, characterized in that: The sand filling device (40) comprises a plurality of sand filling assemblies (70), and the plurality of sand filling assemblies (70) are connected in parallel.

6. The impurity separation device for output gas detection according to claim 5, characterized in that: The sand filling assembly (70) comprises: A sand filling tank (71), the sand filling tank (71) comprising a filling space (711), a filling inlet (712) connected to the filling space (711), a first filling outlet (713) and a second filling outlet (714), the gas flowing out of the buffer device (30) enters the filling space (711) through the filling inlet (712), the first filling outlet (713) is connected to the dehumidification device (50), and the first filling outlet (713) is located above the second filling outlet (714); A sand filling liquid collecting cup (72), wherein the sand filling liquid collecting cup (72) is in communication with the second filler outlet (714) to collect impurities separated by the sand filling tank (71).

7. The impurity separation device for output gas detection according to claim 6, characterized in that: The sand filling tank (71) further comprises a filler assembly (715) for absorbing suspended matter, wherein the filler assembly (715) is arranged in the filler space (711), the filler inlet (712) is located below the filler assembly (715), and the first filler outlet (713) is located above the filler assembly (715).

8. The impurity separation device for output gas detection according to claim 7, characterized in that: The packing assembly (715) comprises: Two partitions (716), the two partitions (716) are arranged at intervals, and the partitions (716) abut against the inner wall of the sand filling tank (71), A packing layer (717), wherein the packing layer (717) is located between the two partitions (716).

9. The impurity separation device for output gas detection according to claim 6, characterized in that: The sand filling tank (71) further comprises a filler cleaning liquid inlet (718), and the filler cleaning liquid inlet (718) is located at the top of the sand filling tank (71).

10. The impurity separation device for output gas detection according to any one of claims 1 to 9, characterized in that: The dehumidification device (50) comprises a plurality of dehumidification components (80), and the plurality of dehumidification components (80) are connected in parallel.

11. The impurity separation device for output gas detection according to claim 10, characterized in that: The dehumidification component (80) comprises: A dehumidification tank (81), the dehumidification tank (81) comprising a dehumidification space (811), a dehumidification inlet (812) connected to the dehumidification space (811), a first dehumidification outlet (813) and a second dehumidification outlet (814), the gas flowing out of the sand filling device (40) enters the dehumidification space (811) through the dehumidification inlet (812), the first dehumidification outlet (813) is connected to the gas flow monitoring device (60), and the first dehumidification outlet (813) is located above the second dehumidification outlet (814); A dehumidification liquid collecting cup (82), the dehumidification liquid collecting cup (82) is connected to the second dehumidification outlet (814) to collect the liquid separated by the dehumidification tank (81).

12. The impurity separation device for output gas detection according to claim 11, characterized in that: The dehumidification tank (81) also includes a dehumidification component (815) for absorbing moisture. The dehumidification component (815) is arranged in the dehumidification space (811), the dehumidification inlet (812) is located below the dehumidification component (815), and the first dehumidification outlet (813) is located above the dehumidification component (815).

13. The impurity separation device for output gas detection according to claim 12, characterized in that: The moisture absorbing component (815) comprises: Two isolation plates (816), the two isolation plates (816) are arranged at intervals, and the isolation plates (816) abut against the inner wall of the dehumidification tank (81), A hygroscopic layer (817), wherein the hygroscopic layer (817) is located between the two isolation plates (816).

14. The impurity separation device for output gas detection according to claim 11, characterized in that: The dehumidification tank (81) further comprises a dehumidification and cleaning liquid inlet (818), and the dehumidification and cleaning liquid inlet (818) is located at the top of the dehumidification tank (81).

15. The impurity separation device for output gas detection according to any one of claims 1 to 9, characterized in that: The control device (10) comprises: A transmission pipeline (11), wherein two ends of the transmission pipeline (11) are respectively connected to the gas transmission main pipeline (20) and the buffer device (30); a ball valve (12), the ball valve (12) being arranged on the transmission pipeline (11); A pressure regulating valve (13), wherein the pressure regulating valve (13) is arranged on the transmission pipeline (11), and the ball valve (12) is located between the pressure regulating valve (13) and the gas transmission main pipeline (20).

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