Automatic exhaust device of solution activated carbon filter

Abstract

The utility model discloses an automatic exhaust device of a solution activated carbon filter. The automatic exhaust device comprises an activated carbon filter, an exhaust differential pressure transmitter, an activated carbon differential pressure transmitter, a control valve and a controller, the exhaust differential pressure transmitter is used for measuring a differential pressure value generated by a solution in a top area of an activated carbon section in the activated carbon filter and determining a gas collection condition at the top of the filter according to the change of the differential pressure value; the activated carbon differential pressure transmitter is used for measuring the differential pressure value of the activated carbon section in the activated carbon filter and determining the adsorption condition of the activated carbon according to the change of the differential pressure value; the control valve is arranged on an exhaust pipeline at the rear end of the pressure relief opening of the activated carbon filter and connected in parallel with the pressure relief pipeline, and the exhaust differential pressure transmitter, the activated carbon differential pressure transmitter and the control valve are all electrically connected with the controller. The device realizes automatic exhaust of the solution activated carbon filter, and ensures the operation effect of the activated carbon filter.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas purification and processing, in particular to an automatic exhaust device for a solution activated carbon filter. Background Art

[0002] In the process of purifying sulfur-containing natural gas, the rich amine liquid after absorbing acidic gas must be passed through an activated carbon filter to remove the deterioration and degradation products produced during the regeneration process of the solution due to the long-term operation of the production unit, the solid impurities brought from the upstream, and the solid substances produced in the solution system. Since the rich amine liquid contains H2S, CO2 and a small amount of methane, they will be resolved and gathered at the top of the activated carbon filter. If the gathered gas is not discharged in time, the gas phase space at the top of the filter will expand as the gathered gas increases. Once it expands to the space of the activated carbon section, the use effect of the activated carbon filter will be reduced.

[0003] The activated carbon filter devices currently in use can usually only be manually exhausted at the top of the activated carbon filter regularly to ensure stable operation of the device. When the device is operating abnormally, especially when the solution foams, the exhaust frequency of the activated carbon filter will increase significantly, and the length of each exhaust time depends entirely on manual experience. Improper operation often causes large fluctuations in fluid flow, which in turn causes production device fluctuations, interlocking shutdowns, and accidents where product natural gas quality indicators do not meet standards. At the same time, the exhaust gas is rich in toxic substances, which can easily cause human poisoning and environmental pollution, seriously threatening human safety. Utility Model Content

[0004] The utility model aims to provide an automatic exhaust device for a solution activated carbon filter in a natural gas purification plant, which realizes automatic exhaust of the solution activated carbon filter in the natural gas purification plant and ensures the operation effect of the activated carbon filter, in view of the problem that the solution activated carbon filter in the natural gas purification plant needs to be manually exhausted on site regularly during operation, which is easy to cause fluctuations in production equipment, interlocking shutdown and accidents of unqualified product natural gas quality indicators due to improper operation.

[0005] The utility model is realized by the following technical solutions:

[0006] The utility model provides an automatic exhaust device for a solution activated carbon filter, comprising an activated carbon filter, an exhaust differential pressure transmitter, an activated carbon differential pressure transmitter, a control valve and a controller; the exhaust differential pressure transmitter is used to measure the differential pressure value generated by the solution in the top area of ​​the activated carbon section in the activated carbon filter, and determine the gas collection situation at the top of the filter according to the change of the differential pressure value; the activated carbon differential pressure transmitter is used to measure the differential pressure value of the activated carbon section in the activated carbon filter, and determine the adsorption situation of the activated carbon according to the change of the differential pressure value; the control valve is arranged on the exhaust pipeline connected in parallel with the pressure relief pipeline at the rear end of the pressure relief port of the activated carbon filter, and the exhaust differential pressure transmitter, the activated carbon differential pressure transmitter and the control valve are all electrically connected to the controller.

[0007] In some embodiments, the activated carbon segment is installed in the middle area of ​​the activated carbon filter, and a cavity for accommodating and buffering the inlet and outlet solutions is reserved in the activated carbon filter and between the top and bottom of the activated carbon segment.

[0008] In some embodiments, the positive pressure port of the exhaust differential pressure transmitter is arranged above the top position of the activated carbon segment and below the center line of the liquid inlet, and the negative pressure port of the exhaust differential pressure transmitter is arranged on the pipeline at the rear end of the pressure relief port of the activated carbon filter.

[0009] In some embodiments, the positive pressure port of the activated carbon differential pressure transmitter is arranged below the bottom position of the activated carbon segment, and the negative pressure port of the activated carbon differential pressure transmitter is arranged above the top position of the activated carbon segment and below the center line of the liquid inlet.

[0010] In some embodiments, the positive pressure port of the exhaust differential pressure transmitter is shared with the negative pressure port of the activated carbon differential pressure transmitter.

[0011] In some embodiments, the pressure relief port of the activated carbon filter is connected to a pressure relief pipeline, a safety valve is provided on the pressure relief pipeline, and manual valves are provided at the front and rear ends of the safety valve, respectively.

[0012] In some embodiments, an exhaust pipeline is connected to the pressure relief pipeline between the safety valve and the manual valve at its front end, the exhaust pipeline is connected in parallel with the safety valve and the manual valve at its rear end, the control valve is arranged on the exhaust pipeline, and a manual valve is provided at the rear end of the control valve.

[0013] In some embodiments, rear ends of the exhaust line and the pressure relief line are both connected to a regeneration system.

[0014] In some embodiments, the liquid inlet of the activated carbon filter is located above the activated carbon section, and the liquid outlet is located below the activated carbon section. The liquid inlet is used to allow the rich amine liquid from upstream to pass through the liquid outlet pipe to allow the filtered rich amine liquid to pass downstream.

[0015] In some embodiments, a bypass pipeline is connected in parallel to the front end pipeline of the liquid inlet, a manual valve is provided on the bypass pipeline, and the rear end of the bypass pipeline is connected to the downstream of the liquid outlet pipe.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0017] The automatic exhaust device for the solution activated carbon filter provided in the utility model realizes the automatic exhaust of the solution activated carbon filter in the natural gas purification plant, avoids the safety risks brought by frequent manual exhaust operations, ensures the operation effect of the activated carbon filter, and improves the stability of the operation of the production device. It not only avoids the occurrence of interlocking shutdown accidents of the production device caused by large fluctuations in fluid flow due to improper operation, but also greatly reduces the labor intensity of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 This is a schematic diagram of the automatic exhaust device of the solution activated carbon filter in the utility model;

[0020] Figure 2 It is a schematic diagram of the solution activated carbon filter in the utility model;

[0021] Figure 3 It is a schematic diagram of the shared state of the positive pressure port of the exhaust differential pressure transmitter and the negative pressure port of the activated carbon differential pressure transmitter on the solution activated carbon filter in the utility model.

[0022] Marks and corresponding parts names in the attached drawings:

[0023] 1-activated carbon filter, 11-activated carbon section, 12-liquid inlet pipe, 13-liquid outlet pipe, 2-activated carbon differential pressure transmitter, 3-exhaust differential pressure transmitter, 4-control valve, 5-primary valve, 6-exhaust pipeline, 7-pressure relief pipeline, 8-safety valve, 9-bypass pipeline, A / B / C / D / E / F-manual valve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0026] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0029] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0030] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces), unless otherwise clearly and specifically defined.

[0031] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] Please refer to Figures 1 to 3 An automatic exhaust device for a solution activated carbon filter provided in an embodiment of the present application comprises an activated carbon filter 1, an exhaust differential pressure transmitter 3, an activated carbon differential pressure transmitter 2, a control valve 4 and a controller, wherein the exhaust differential pressure transmitter 3 is used to measure the differential pressure value generated by the solution in the top area of ​​the activated carbon section 11 in the activated carbon filter 1, and the activated carbon differential pressure transmitter 2 is used to measure the differential pressure value of the activated carbon section 11 in the activated carbon filter 1. The control valve 4 is arranged on an exhaust pipeline connected in parallel with the pressure relief line at the rear end of the pressure relief port of the activated carbon filter 1, and the exhaust differential pressure transmitter 3, the activated carbon differential pressure transmitter 2 and the control valve 4 are all electrically connected to the controller.

[0034] In this embodiment, the activated carbon filter 1 has a liquid inlet, a liquid outlet and a pressure relief port. The rich amine liquid to be filtered enters the filter from the liquid inlet, is discharged from the liquid outlet after being filtered by the activated carbon section, and the gas accumulated in the filter is discharged from the pressure relief port. The differential pressure value of the activated carbon section 11 in the activated carbon filter 1 is measured by the activated carbon differential pressure transmitter 2, and the adsorption of the activated carbon is determined according to the change of the differential pressure value; the differential pressure value generated by the solution in the top area of ​​the activated carbon section 11 in the activated carbon filter 1 is measured by the exhaust differential pressure transmitter 3, and the gas collection condition at the top of the filter is determined according to the change of the differential pressure value; the controller controls the opening and closing of the control valve 4 according to the differential pressure value signal, thereby realizing the automatic exhaust function of the filter, and at the same time, it is conducive to ensuring the use effect of the activated carbon filter.

[0035] According to some embodiments of the present application, the activated carbon segment 11 is installed in the middle area of ​​the activated carbon filter 1, and a cavity for accommodating and buffering the in-and-out solutions is reserved between the activated carbon filter 1 and the top and bottom of the activated carbon segment 11. Specifically, activated carbon, a metal mesh and a fixing bracket are installed in the activated carbon filter 1, and the activated carbon is fixed by the metal mesh and the fixing bracket. Since the activated carbon segment is arranged in the middle area of ​​the filter, a certain space is reserved at the top and bottom for accommodating and buffering the solutions in and out of the filter.

[0036] According to some embodiments of the present application, the positive pressure port of the exhaust differential pressure transmitter 3 is arranged above the top position of the activated carbon segment 11 and below the center line of the liquid inlet, and the negative pressure port of the exhaust differential pressure transmitter 3 is arranged on the pipeline at the rear end of the pressure relief port of the activated carbon filter 1. Specifically, the exhaust differential pressure transmitter 3 is a common differential pressure transmitter, and the distance between its positive and negative pressure ports should cover most of the area above the top of the activated carbon segment 11.

[0037] According to some embodiments of the present application, the positive pressure port of the activated carbon differential pressure transmitter 2 is arranged below the bottom position of the activated carbon segment 11, and the negative pressure port of the activated carbon differential pressure transmitter 2 is arranged above the top position of the activated carbon segment 11 and below the center line of the liquid inlet. Specifically, the activated carbon differential pressure transmitter 2 is a common differential pressure transmitter, and the distance between its positive and negative pressure ports should cover the installation area exceeding the activated carbon segment 11.

[0038] In this embodiment, a primary valve 5 is provided after the positive and negative pressure ports of the activated carbon differential pressure transmitter 2 and the exhaust differential pressure transmitter 3, so that the maintenance or replacement of the differential pressure transmitter can be facilitated by controlling the opening and closing of the primary valve.

[0039] According to some embodiments of the present application, the positive pressure port of the exhaust differential pressure transmitter 3 is shared with the negative pressure port of the activated carbon differential pressure transmitter 2, so that the number of openings on the side wall of the filter can be reduced.

[0040] According to some embodiments of the present application, the pressure relief port of the activated carbon filter 2 is connected to a pressure relief pipeline 7, a safety valve 8 is provided on the pressure relief pipeline 7, and a manual valve A and a manual valve C are provided at the front and rear ends of the safety valve 8. Specifically, the pressure relief pipeline 7 is connected to the pressure relief port at the top of the activated carbon filter 1, and a section of the pressure relief pipeline at the outlet end has a vertical pipe section.

[0041] According to some embodiments of the present application, an exhaust pipeline 6 is connected between the safety valve 8 and the manual valve A at the front end of the pressure relief pipeline 7, and the exhaust pipeline 6 is connected in parallel with the safety valve 8 and the manual valve C at the rear end thereof. The control valve 4 is arranged on the exhaust pipeline 6, and a manual valve B is arranged at the rear end of the control valve 4. In this design, the manual valve A at the front end of the control valve 4 is arranged on the vertical pipe section, which can prevent the solution from entering the exhaust pipeline when the filter is running; the manual valve B is arranged at the rear end of the control valve 4 to facilitate the inspection and replacement of the control valve when it fails.

[0042] According to some embodiments of the present application, the rear ends of the exhaust pipe 6 and the pressure relief pipe 7 are both connected to the regeneration system, so that the exhausted gas or the pressure-relieved liquid also enters the subsequent system for processing to avoid causing environmental pollution.

[0043] According to some embodiments of the present application, the liquid inlet of the activated carbon filter 1 is located above the activated carbon section 11, and the liquid outlet is located below the activated carbon section 11. The liquid inlet is connected to the liquid inlet pipe 12 for introducing the rich amine liquid from the upstream. The liquid inlet pipe 12 is provided with a manual valve D for adjusting the inflow flow of the rich amine liquid. The liquid outlet introduces the filtered rich amine liquid to the downstream through the liquid outlet pipe 13.

[0044] According to some embodiments of the present application, a bypass line 9 is connected in parallel to the liquid inlet pipe 12 before the manual valve D, and a manual valve E is provided on the bypass line 9 to adjust the flow of the bypass line. The rear end of the bypass line 9 is connected to the downstream of the liquid outlet pipe 13, so that when the activated carbon filter is overhauled or fails, the rich amine liquid can be passed into the downstream through the bypass line, so that the production device does not need to be temporarily stopped. A manual valve F is provided on the liquid outlet pipe 13 after the liquid outlet to adjust the flow of the liquid outlet pipe.

[0045] When the activated carbon filter is put into operation, since the rich amine liquid is rich in H2S, CO2 and a small amount of methane, it will accumulate in the top space of the filter after being resolved after entering the filter. As more gas is gathered, the height of the solution at the top will decrease, and the measured value of the exhaust differential pressure transmitter will also decrease. When the measured value of the exhaust differential pressure transmitter is less than the set value S1, the controller issues a command to open the control valve for exhaust. As the gas at the top of the filter is discharged, the height of the solution in the top area will rise, and the measured value of the exhaust differential pressure transmitter will also increase. When the measured value of the exhaust differential pressure transmitter is greater than the set value S2, the controller issues a command to close the control valve to end the exhaust.

[0046] Specifically, the setting value S1 = ρgh1, where ρ is the density of the liquid to be filtered, g is the acceleration of gravity, and h1 is the height difference between the positive pressure port of the exhaust differential pressure transmitter and the center line of the liquid inlet relative to the activated carbon filter. The setting value S2 = ρgh2, where ρ is the density of the liquid to be filtered, g is the acceleration of gravity, and h2 is the relative height of the intersection of the positive pressure port of the exhaust differential pressure transmitter and the spherical top and side wall of the activated carbon filter.

[0047] The automatic exhaust device for the solution activated carbon filter provided in the present embodiment realizes the automatic exhaust of the solution activated carbon filter in the natural gas purification plant, avoids the safety risks brought by frequent manual exhaust operations, ensures the operation effect of the activated carbon filter, improves the stability of the operation of the production device, and not only avoids the occurrence of interlocking and stopping accidents of the production device caused by large fluctuations in fluid flow due to improper operation, but also greatly reduces the labor intensity of operators; it is suitable for existing natural gas desulfurization devices, industrial tail gas desulfurization devices, and tail gas treatment devices, and can be widely used in petroleum, chemical, thermal power generation and other industries, with a wide range of applications and good application prospects.

[0048] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An automatic exhaust device for a solution activated carbon filter, characterized in that: It includes an activated carbon filter, an exhaust differential pressure transmitter, an activated carbon differential pressure transmitter, a control valve and a controller; the exhaust differential pressure transmitter is used to measure the differential pressure value generated by the solution in the top area of ​​the activated carbon section in the activated carbon filter, and determine the gas collection situation at the top of the filter according to the change of the differential pressure value; the activated carbon differential pressure transmitter is used to measure the differential pressure value of the activated carbon section in the activated carbon filter, and determine the adsorption situation of the activated carbon according to the change of the differential pressure value; the control valve is arranged on the exhaust pipeline connected in parallel with the pressure relief line at the rear end of the pressure relief port of the activated carbon filter, and the exhaust differential pressure transmitter, the activated carbon differential pressure transmitter and the control valve are all electrically connected to the controller.

2. The automatic exhaust device for solution activated carbon filter according to claim 1, characterized in that: The activated carbon segment is installed in the middle area of ​​the activated carbon filter, and cavities for accommodating and buffering inlet and outlet solutions are reserved between the activated carbon filter and the top and bottom of the activated carbon segment.

3. The automatic exhaust device for solution activated carbon filter according to claim 1, characterized in that: The positive pressure port of the exhaust differential pressure transmitter is arranged above the top position of the activated carbon section and below the center line of the liquid inlet, and the negative pressure port of the exhaust differential pressure transmitter is arranged on the pipeline at the rear end of the pressure relief port of the activated carbon filter.

4. The automatic exhaust device for solution activated carbon filter according to claim 1, characterized in that: The positive pressure port of the activated carbon differential pressure transmitter is arranged below the bottom position of the activated carbon segment, and the negative pressure port of the activated carbon differential pressure transmitter is arranged above the top position of the activated carbon segment and below the center line of the liquid inlet.

5. The automatic exhaust device for solution activated carbon filter according to claim 3 or 4, characterized in that: The positive pressure port of the exhaust differential pressure transmitter is shared with the negative pressure port of the activated carbon differential pressure transmitter.

6. The automatic exhaust device for solution activated carbon filter according to claim 1, characterized in that: The pressure relief port of the activated carbon filter is connected to a pressure relief pipeline, a safety valve is arranged on the pressure relief pipeline, and manual valves are respectively arranged at the front and rear ends of the safety valve.

7. The automatic exhaust device for solution activated carbon filter according to claim 6, characterized in that: An exhaust pipeline is connected to the pressure relief pipeline between the safety valve and the manual valve at its front end. The exhaust pipeline is connected in parallel with the safety valve and the manual valve at its rear end. The control valve is arranged on the exhaust pipeline, and a manual valve is arranged at the rear end of the control valve.

8. The automatic exhaust device for solution activated carbon filter according to claim 7, characterized in that: The rear ends of the exhaust pipe and the pressure relief pipe are both connected to the regeneration system.

9. The automatic exhaust device for solution activated carbon filter according to claim 1, characterized in that: The liquid inlet of the activated carbon filter is located above the activated carbon section, and the liquid outlet is located below the activated carbon section. The liquid inlet is used to allow the rich amine liquid from the upstream to pass through the liquid outlet pipe to allow the filtered rich amine liquid to pass to the downstream.

10. The automatic exhaust device for solution activated carbon filter according to claim 9, characterized in that: A bypass pipeline is connected in parallel to the front pipeline of the liquid inlet, a manual valve is arranged on the bypass pipeline, and the rear end of the bypass pipeline is connected to the downstream of the liquid outlet pipe.

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