Moisture filtering device for natural gas

Abstract

The utility model relates to the field of natural gas analysis, in particular to a moisture filtering device for natural gas, which comprises a device body, a filter element and a liquid discharge pump, the device body is provided with a gas sample inlet, a gas sample outlet, a liquid discharge port and a filtering cavity, and the gas sample inlet, the gas sample outlet and the liquid discharge port respectively penetrate through the device body. The gas sample inlet, the gas sample outlet and the liquid outlet are respectively communicated with the filtering cavity; the filter element is located in the filter cavity and connected with the gas sample outlet, the liquid outlet is located in the bottom or the bottom side of the filter cavity, the bottom of the filter cavity and the filter element are arranged at intervals, and the gas sample inlet and the filter element are arranged at intervals; the liquid outlet is connected with a liquid discharge pipeline which is connected with a liquid discharge pump; sampling gas is filtered through the filter element after water is condensed in the filter cavity, so that the water vapor filtering quality of the sampling gas is ensured, and the filter element replacement frequency is reduced; the liquid discharge pump discharges condensate water in time, the moisture filtering device can operate for a long time, frequent replacement of a filter element is avoided, and continuous and stable operation of gas sampling analysis work is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of natural gas analysis, in particular to a moisture filtering device for natural gas. Background Art

[0002] Before analyzing the gas composition of natural gas, moisture filtration is required. Currently, a sealed membrane filter device is used to filter the moisture of the sampled gas.

[0003] However, when the sampled gas contains a large amount of high-temperature water vapor, the membrane filter cannot discharge the water, and the water vapor accumulates in the sealing filter element, causing the filter element to quickly become saturated and fail, and the purpose of real-time water filtering cannot be achieved. If the sealing filter element is not replaced in time, the water vapor will enter the subsequent analyzer, causing the analysis value of the subsequent analyzer to be abnormal, causing adverse effects on the normal progress of the process production; moreover, when the sampled gas contains a large amount of high-temperature water vapor, the membrane filter needs to be frequently inspected and replaced, which increases the workload of the operating personnel, which not only affects the normal operation of production but also increases production costs. Utility Model Content

[0004] The utility model aims to overcome the deficiency in the prior art that the currently used moisture filtering device cannot cope with the sampling gas containing a large amount of high-temperature water vapor, and provides a moisture filtering device for natural gas.

[0005] In a first aspect, the utility model provides a moisture filtering device for natural gas, comprising:

[0006] The device body is provided with a gas inlet, a gas outlet, a liquid discharge port and a filter cavity, the gas inlet, the gas outlet and the liquid discharge port respectively penetrate the device body, and the gas inlet, the gas outlet and the liquid discharge port are respectively connected to the filter cavity;

[0007] A filter element, wherein the filter element is located in the filter cavity, the filter element is connected to the gas outlet, the liquid discharge port is located at the bottom or bottom side of the filter cavity, the bottom of the filter cavity is spaced apart from the filter element, and the gas inlet is spaced apart from the filter element;

[0008] A liquid discharge pump, wherein the liquid discharge port is connected to a liquid discharge pipe, and the liquid discharge pipe is connected to the liquid discharge pump.

[0009] The utility model discloses a moisture filtering device for natural gas. Sampled gas mixed with high-temperature water vapor enters the filter chamber from the gas inlet port. The high-temperature water vapor condenses in the filter chamber and then enters the filter element. Under the action of gravity, condensed droplets gather at the bottom of the filter chamber to form condensed water. The sampled gas is dehydrated twice by the filter element and then discharged from the gas outlet port. By arranging a gap between the bottom of the filter chamber and the filter element, a certain space is reserved for the storage of condensed water, so as to avoid the contact between the condensed water and the filter element and cause the filter element to be saturated quickly. By arranging the gap between the gas inlet port and the filter element, it is possible to avoid the high-temperature water vapor directly entering the filter element and causing the filter element to be saturated quickly. The condensed water gathered at the bottom of the filter chamber is promptly pumped out by the drain pump through the drain port. The utility model discloses a moisture filtering device for natural gas. The moisture filtering operation can be continuously and stably performed on the sampled gas containing a large amount of high-temperature water vapor, thereby reducing the workload of the operators, saving the cost and ensuring the accuracy and effectiveness of the analysis results.

[0010] Preferably, the device body includes a base and a shell, the base and the shell are snapped together to form the filter chamber, the gas inlet and the gas outlet are both located on the base, the filter element is connected to the base, and the drain port is located in the shell.

[0011] The detachable connection between the shell and the base makes it easier to maintain the filter chamber; the filter element is fixed to the base through a detachable connection, and costs can be saved by replacing the saturated filter element; the gas inlet and gas outlet are both set on the base, which makes it easy to disassemble the shell.

[0012] Preferably, the bottom of the filter cavity is constructed in a funnel shape, and the drainage port is connected to the lowest point of the filter cavity.

[0013] Under the action of gravity, condensed water is more easily gathered through the bottom of the funnel-shaped filter chamber, and the condensed water is easily discharged by connecting the drain port to the lowest point of the filter chamber.

[0014] Preferably, a connecting piece is provided on the top of the base, and the connecting piece comprises a bent structural piece.

[0015] The bent structural member can fix the device body to a vertical wall or a vertical side of the device.

[0016] Preferably, the device body is provided with a gas dispersion device, the gas dispersion device is located in the filter cavity, the gas dispersion device is communicated with the gas inlet, and the gas dispersion device is spaced apart from the filter element.

[0017] The gas dispersion device is used to change the flow direction and flow rate of the sampling gas entering the filter chamber, which is convenient for the sampling gas to condense in the filter chamber; the gas dispersion device is spaced apart from the filter element to prevent the sampling gas from directly entering the filter element.

[0018] Preferably, the gas dispersion device comprises a straight tube, one end of which is closed and the other end is connected to the gas inlet, and a side wall of the straight tube is provided with a plurality of through dispersion holes.

[0019] After the sampling gas enters the straight tube, it is discharged through a number of dispersion holes. The dispersion holes change the flow rate and direction of the sampling gas, making it easier for the sampling gas to condense in the filter cavity to remove most of the moisture. Preferably, the dispersion holes are arranged along the axial direction of the straight tube.

[0020] Preferably, the device body is provided with a gas inlet tube and a gas outlet tube, the gas inlet tube is connected to the gas inlet port, and the gas outlet tube is connected to the gas outlet port.

[0021] The arrangement of the gas sampling inlet tube and the gas sampling outlet tube makes it easier to connect the device body to the pipeline, making it convenient to use.

[0022] Preferably, the liquid discharge pipe is provided with a check valve.

[0023] By providing a check valve, external gas can be prevented from entering the filter chamber through the discharge port, thereby ensuring the sampling accuracy of the sampled gas. When the discharge pump is a peristaltic pump, the check valve can further prevent gas from entering the filter chamber as a safeguard.

[0024] Preferably, it further comprises a control device, which is connected to the drainage pump, and is provided with a first probe and a second probe for sensing the change of the liquid level in the filter chamber, and the first probe and the second probe are respectively connected to the device body.

[0025] The control device is provided to control the liquid displacement pump. The control device can control the working device of the liquid displacement pump according to the liquid level height in the control chamber, thereby realizing automatic control of the start and stop of the liquid displacement pump.

[0026] Preferably, the height of the first probe is higher than the height of the second probe.

[0027] The setting height of the first probe is higher than that of the second probe. When the first probe detects liquid, the liquid discharge pump is controlled to start; when the liquid detected by the second probe disappears, the liquid discharge pump is controlled to stop.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] 1. The utility model is a moisture filtering device for natural gas. The sampled gas mixed with high-temperature water vapor enters the filter chamber from the gas inlet port. The high-temperature water vapor condenses in the filter chamber and then enters the filter element. Under the action of gravity, the condensed droplets gather at the bottom of the filter chamber to form condensed water. The sampled gas is dehydrated by the filter element for the second time and then discharged from the gas outlet port. By setting a gap between the bottom of the filter chamber and the filter element, a certain space is reserved for the storage of condensed water to avoid the contact between the condensed water and the filter element and causing the filter element to be quickly saturated. By setting the gap between the gas inlet and the filter element, it is possible to avoid high-temperature water vapor directly entering the filter element and causing the filter element to be quickly saturated. The condensed water gathered at the bottom of the filter chamber is promptly pumped out by the drain pump through the drain port. The utility model is a moisture filtering device for natural gas. It is possible to continuously and stably perform moisture filtering operations on sampled gas containing a large amount of high-temperature water vapor, thereby reducing the workload of operators, saving costs, and ensuring that the analysis results are accurate and effective.

[0030] 2. The utility model provides a moisture filtering device for natural gas, which has a simple structure, is easy to manufacture and easy to use. The sampling gas enters the filter chamber for condensation and then passes through the filter element for filtration, thereby improving the filtration efficiency and ensuring the water vapor filtration quality of the sampled gas. The drainage pump promptly discharges the condensed water in the filter chamber, so that the moisture filtering device can operate for a long time, avoiding frequent replacement of the filter element, ensuring the continuous and stable operation of the gas sampling and analysis work, reducing the workload of the operating personnel, saving costs, ensuring that the analysis results are accurate and effective, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a moisture filtering device for natural gas in Example 1;

[0032] Figure 2 is a schematic structural diagram of one or more implementation methods of Example 1;

[0033] Figure 3 is a schematic cross-sectional structural diagram of one or more implementations of Example 1;

[0034] Figure 4 is a schematic structural diagram of a gas dispersion device according to one or more embodiments of Example 1;

[0035] Figure 5 It is a structural schematic diagram of a moisture filtering device for natural gas in Example 2.

[0036] Markings in the figure:

[0037] 1-device body, 11-base, 12-shell, 13-filter chamber, 14-gas inlet, 15-gas outlet, 16-liquid discharge port, 2-filter element, 3-gas inlet tube, 4-gas outlet tube, 5-connecting piece, 6-liquid discharge pipe, 7-liquid discharge pump, 8-gas dispersion device, 81-straight tube, 82-dispersion hole, 9-control device, 91-first probe, 92-second probe. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0039] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0040] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0041] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0042] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0043] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0044] Example 1

[0045] like Figure 1-Figure 4 As shown, a moisture filtering device for natural gas includes a device body 1, a filter element 2 and a drainage pump 7.

[0046] The device body 1 is a cylindrical structure, and the two ends of the cylindrical structure serve as the top and bottom of the device body 1 respectively. A cylindrical filter cavity 13 is arranged in the device body 1. A gas inlet 14, a gas outlet 15 and a liquid discharge port 16 are also arranged on the device body 1, wherein the gas inlet 14 and the gas outlet 15 are both located on the top side of the device body 1, and the liquid discharge port 16 is located on the bottom side of the device body 1, and the liquid discharge port 16, the gas inlet 14 and the gas outlet 15 are respectively connected to the filter cavity 13;

[0047] A filter element 2 is arranged in the filter cavity 13, the filter element 2 is connected to the gas outlet 15, the gas inlet 14 is arranged at a distance from the filter element 2, the liquid discharge port 16 penetrates the device body 1 from the bottom of the filter cavity 13, and the gas inlet 14 and the gas outlet 15 penetrate the device body 1 from the side of the device body 1;

[0048] The drainage port 16 is connected to a drainage pipe 6 , and the drainage pipe 6 is connected to a drainage pump 7 .

[0049] The sampled gas mixed with high-temperature water vapor enters the filter chamber 13 from the gas inlet 14, and the high-temperature water vapor condenses in the filter chamber 13 and enters the filter element 2. Under the action of gravity, the condensed droplets gather at the bottom of the filter chamber 13 to form condensed water, and the sampled gas is discharged from the gas outlet 15 after secondary dehydration by the filter element 2; by arranging a gap between the bottom of the filter chamber 13 and the filter element 2, a certain space is reserved for the storage of condensed water, so as to avoid the contact of condensed water with the filter element 2 and the rapid saturation of the filter element 2; by arranging the gas inlet 14 and the filter element 2 at a gap, it is possible to avoid the high-temperature water vapor directly entering the filter element 2 and causing the rapid saturation of the filter element 2; the condensed water gathered at the bottom of the filter chamber 13 is promptly pumped out by the drainage pump 7 through the drainage port 16; the utility model is a moisture filtering device for natural gas, which can continuously and stably perform moisture filtering operations on sampled gas containing a large amount of high-temperature water vapor, reduces the workload of operators, saves costs, and ensures accurate and effective analysis results;

[0050] Specifically, the drainage pump 7 is a peristaltic pump, which can prevent air from entering the drainage cavity from the drainage port 16 .

[0051] In one or several embodiments, the device body 1 is composed of a base 11 and a shell 12. The shell 12 has a storage space inside. The shell 12 is snapped with the base 11 to make the storage space closed to form a filter chamber 13. The gas inlet 14 and the gas outlet 15 are both located on the base 11. The filter element 2 is detachably connected to the base 11. The filter element 2 can be quickly replaced by disassembling the shell 12 and the filter element 2. A drain port 16 is provided on the shell 12, and the drain port 16 is used to discharge condensed water in the filter chamber 13.

[0052] In an optional embodiment, the bottom of the filter chamber 13 is funnel-shaped, and the drain port 16 is located at the lowest point of the filter chamber 13. The gas entering the filter chamber 13 condenses in the filter chamber 13, and the condensed droplets fall to the bottom of the filter chamber 13 under the action of gravity. The drain port 16 is located at the lowest point of the funnel, so that the condensed water gathered at the bottom of the funnel-shaped filter chamber 13 can be more easily discharged.

[0053] In an optional embodiment, a connecting member 5 is provided on the top of the base 11. The connecting member 5 is a bending structure member, and the bending structure member is a right-angle bending member. A first connecting portion is provided on one side of the right-angle bending member, and the first connecting portion is bolted to the base 11. A second connecting portion is provided on the other side of the right-angle bending member, and the device body 1 can be fixed on a vertical plane through the second connecting portion.

[0054] In one or several embodiments, the device body 1 is provided with a gas dispersion device 8, which is located in the filter cavity 13, and a gap is provided between the gas dispersion device 8 and the filter element 2, and the gas dispersion device 8 is connected to the gas inlet 14; after the gas enters the dispersion device, the flow rate and direction of the sampling gas are changed, so that the sampling gas is easier to condense moisture in the filter cavity 13, thereby improving the moisture filtration efficiency and increasing the service life of the filter element 2.

[0055] In an optional embodiment, the gas dispersion device 8 is a straight tube 81, one end of the straight tube 81 is sealed and the other end is connected to the gas inlet 14, and a plurality of through dispersion holes 82 are provided on the side wall of the straight tube 81; the sampling gas is dispersed through the dispersion holes 82.

[0056] Preferably, the gas dispersion holes 82 are arranged along the axial direction of the straight tube 81 , and two rows of gas dispersion holes 82 are respectively arranged on two opposite sides of the straight tube 81 .

[0057] In one or several embodiments, the device body 1 is provided with a gas inlet tube 3 and a gas outlet tube 4, the gas inlet tube 3 is connected to the gas inlet port 14, and the gas outlet tube 4 is connected to the gas outlet port 15; the gas inlet tube 3 and the gas outlet tube 4 can make the device body 1 easier to be set on the pipeline, making the moisture filtering device for natural gas easier to use.

[0058] In one or more embodiments, the liquid discharge pipe 6 is provided with a check valve; the check valve can further prevent air from entering the filter chamber 13, thereby ensuring the purity of the sampled gas.

[0059] In one or more embodiments, the housing 12 is a transparent structure.

[0060] In one or several embodiments, the liquid displacement pump 7 is provided with a button switch.

[0061] Example 2

[0062] like Figure 5 The structure of the moisture filtering device for natural gas shown is roughly the same as that of Example 1. The difference from Example 1 is that it also includes a control device 9, which is connected to the drainage pump 7. The control device 9 is provided with a sensing device, which is connected to the device body 1.

[0063] The change of the condensed water level in the filter chamber 13 is sensed by the sensing device to control the start and stop of the drainage pump 7 ; the control device 9 is a device capable of controlling the start and stop of the drainage pump 7 .

[0064] In one or several embodiments, the sensing device is a first probe 91 and a second probe 92 vertically spaced apart, the first probe 91 and the second probe 92 are both communicatively connected to the control device 9 , and the first probe 91 and the second probe 92 are respectively connected to the device body 1 .

[0065] The first probe 91 and the second probe 92 are both infrared sensors.

[0066] The setting height of the first probe 91 is higher than that of the second probe 92. When the first probe 91 detects liquid, the drainage pump 7 is controlled to start; when the liquid detected by the second probe 92 disappears, the drainage pump 7 is controlled to stop.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A moisture filtering device for natural gas, characterized in that: include A device body (1), the device body (1) being provided with a gas inlet (14), a gas outlet (15), a liquid discharge port (16) and a filter chamber (13), the gas inlet (14), the gas outlet (15) and the liquid discharge port (16) respectively penetrating the device body (1), the gas inlet (14), the gas outlet (15) and the liquid discharge port (16) respectively being in communication with the filter chamber (13); A filter element (2), the filter element (2) being located in the filter cavity (13), the filter element (2) being connected to the gas outlet (15), the liquid discharge port (16) being located at the bottom or bottom side of the filter cavity (13), the bottom of the filter cavity (13) being spaced apart from the filter element (2), and the gas inlet (14) being spaced apart from the filter element (2); A liquid discharge pump (7), wherein the liquid discharge port (16) is connected to a liquid discharge pipe (6), and the liquid discharge pipe (6) is connected to the liquid discharge pump (7).

2. A moisture filtering device for natural gas according to claim 1, characterized in that: The device body (1) comprises a base (11) and a shell (12); the base (11) and the shell (12) are snapped together to form the filter chamber (13); the gas inlet (14) and the gas outlet (15) are both located on the base (11); the filter element (2) is connected to the base (11); and the liquid discharge port (16) is located on the shell (12).

3. A moisture filtering device for natural gas according to claim 2, characterized in that: The bottom of the filter chamber (13) is constructed in a funnel shape, and the liquid discharge port (16) is connected to the lowest point of the filter chamber (13).

4. A moisture filtering device for natural gas according to claim 2, characterized in that: A connecting member (5) is provided on the top of the base (11), and the connecting member (5) comprises a bent structural member.

5. The moisture filtering device for natural gas according to claim 1, characterized in that: The device body (1) is provided with a gas dispersion device (8), the gas dispersion device (8) is located in the filter cavity (13), the gas dispersion device (8) is connected to the gas inlet (14), and the gas dispersion device (8) is spaced apart from the filter element (2).

6. A moisture filtering device for natural gas according to claim 5, characterized in that: The gas dispersion device (8) comprises a straight tube (81), one end of the straight tube (81) is closed and the other end is connected to the gas inlet (14), and a plurality of through dispersion holes (82) are provided on the side wall of the straight tube (81).

7. The moisture filtering device for natural gas according to claim 1, characterized in that: The device body (1) is provided with a gas sampling tube (3) and a gas sampling tube (4); the gas sampling tube (3) is connected to the gas sampling port (14); and the gas sampling tube (4) is connected to the gas sampling port (15).

8. The moisture filtering device for natural gas according to claim 1, characterized in that: The liquid discharge pipe (6) is provided with a check valve.

9. A moisture filtering device for natural gas according to any one of claims 1 to 8, characterized in that: It also comprises a control device (9), the control device (9) being connected to the liquid displacement pump (7), the control device (9) being provided with a first probe (91) and a second probe (92) for sensing changes in the liquid level in the filter chamber, the first probe (91) and the second probe (92) being connected to the device body (1) respectively.

10. A moisture filtering device for natural gas according to claim 9, characterized in that: The height of the first probe (91) is higher than the height of the second probe (92).

Images