Sample introduction filter

Abstract

The utility model relates to the technical field of gas filters, in particular to a sample introduction filter, which comprises a stainless steel structural member shell, the shell is provided with a filter channel, the shell is provided with an inlet pipeline and an outlet pipeline which are communicated with the filter channel, the inlet pipeline and the outlet pipeline are oppositely arranged, and the filter channel is communicated with the filter channel. The inlet pipeline is provided with a quick connector, the outlet pipeline is provided with a loose joint nut, and a blocking and filtering mechanism is arranged in the filtering channel. According to the sample introduction filter disclosed by the utility model, the blocking and filtering mechanism is arranged to filter gas passing through the filtering channel and remove solids and moisture in the gas, and the sample introduction filter is applied to a gas chromatographic analyzer, can be quickly connected with a gas sample steel cylinder through a quick-plug connector, and can be stably connected with the gas chromatographic analyzer through a loose joint nut; solid and moisture removal of gas collected by a gas sample steel cylinder is realized, the timeliness and accuracy of sample analysis are improved, and the influence of impurities on the service life of an instrument is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas filters, in particular to a sampling filter. Background Art

[0002] High-sulfur sour gas is untreated natural gas that is extracted from a natural gas wellhead and transported through a pipeline to a natural gas purification plant. Its high sulfur content makes it highly toxic and corrosive. Analyzing the components and sulfides of high-sulfur sour gas can provide a basis for the purification work of the natural gas purification plant and the treatment of natural gas.

[0003] In order to analyze the components and sulfides of high-sulfur sour gas, currently, gas chromatographs are mainly used in laboratories. By connecting a gas sample cylinder to the gas chromatograph through a sampling pipeline, the gas sample in the gas sample cylinder enters the gas chromatograph. The components are separated by a chromatographic column, and then detected using corresponding TCD and PFPD detectors. The peak areas of each component are recorded on a chromatographic workstation, and the content of each component is calculated using the external standard method. However, since high-sulfur sour gas carries certain liquid and particulate impurities during transportation, in the actual analysis process, the sampling pipeline is connected to the gas sample cylinder through a quick connector, and the liquid and particulate impurities carried in the gas directly enter the internal pipeline, switching valve, and chromatographic column of the gas chromatograph, resulting in pipeline blockage, wear and air leakage of the ceramic valve core of the switching valve, and contamination of the chromatographic column. This leads to problems such as inaccurate sampling, sample cross-contamination during switching, and abnormal chromatograms, which not only affect the timeliness and accuracy of sample analysis but also increase the maintenance cost of replacing components such as pipelines, switching valves, and chromatographic columns of the instrument. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the technical problems in the prior art that high-sulfur sour gas carries liquid and particulate impurities, affecting the timeliness and accuracy of sample analysis and increasing the instrument maintenance cost, and to provide a sampling filter.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] A sampling filter includes a housing made of a stainless steel structural member. The housing is provided with a filtering channel, an inlet pipeline and an outlet pipeline that communicate with the filtering channel. The inlet pipeline and the outlet pipeline are arranged opposite to each other. The inlet pipeline is provided with a quick connector, and the outlet pipeline is provided with a union nut. A blocking and filtering mechanism is arranged in the filtering channel.

[0007] An injection filter of the present utility model filters the gas passing through the filter channel through a blocking and filtering mechanism to remove solids and moisture in the gas. It is applied to a gas chromatograph analyzer and can be quickly connected to a gas sample cylinder through a quick connector and stably connected to the gas chromatograph analyzer through a union nut, so as to remove solids and moisture from the gas collected by the gas sample cylinder, improve the timeliness and accuracy of sample analysis, and avoid impurities from affecting the service life of the instrument.

[0008] As a preferred solution of the present utility model, a pretreatment chamber is provided in the filter channel, and a first blocking and filtering mechanism is filled in the pretreatment chamber. The first blocking and filtering mechanism includes fiberglass. After the fiberglass is stacked, staggered pores can be formed to effectively block large particle solids and dust in the gas.

[0009] As a preferred solution of the present utility model, an adsorption chamber is provided in the filter channel, and a second blocking and filtering mechanism is filled in the adsorption chamber. The second blocking and filtering mechanism includes anhydrous calcium chloride particles. The anhydrous calcium chloride particles can effectively adsorb the moisture in the gas and will not precipitate excess substances to affect the composition of the gas.

[0010] As a preferred solution of the present utility model, a filtering chamber is provided in the filter channel, and a third blocking and filtering mechanism is filled in the filtering chamber. The third blocking and filtering mechanism includes fiberglass, and the filling density of the third blocking and filtering mechanism is greater than that of the first blocking and filtering mechanism. So as to further finely filter the gas through smaller pores and remove small particle solids and dust in the gas.

[0011] As a preferred solution of the present utility model, the pretreatment chamber, the adsorption chamber and the filtering chamber are separated by a separation mechanism respectively. To facilitate the setting of the blocking and filtering mechanism.

[0012] As a preferred solution of the present utility model, the separation mechanism includes fiberglass cloth. The fiberglass cloth can further block solids and moisture and improve the treatment effect.

[0013] As a preferred solution of the present utility model, the housing includes a first housing and a second housing connected by hinges. After the first housing and the second housing are buckled, the filter channel is formed. The inlet pipeline and the outlet pipeline are respectively communicated with the second housing, and a flexible seal is provided on the buckling surface of the first housing and the second housing. To facilitate the setting and replacement of the blocking and filtering mechanism.

[0014] As a preferred embodiment of the present utility model, the blocking and filtering mechanism includes a containing container, in which the first blocking and filtering mechanism and / or the second blocking and filtering mechanism and / or the third blocking and filtering mechanism are filled along the gas transmission direction. The filling thicknesses of the first blocking and filtering mechanism, the second blocking and filtering mechanism, and the third blocking and filtering mechanism are all not greater than 1 cm, and the containing container is a net-like structural member. This further facilitates the setting and replacement of the blocking and filtering mechanism, enabling the replacement of the internally filled blocking and filtering mechanism without replacing the housing.

[0015] As a preferred embodiment of the present utility model, clamping grooves are respectively provided on the inner walls of the first housing and the second housing, and the containing container is provided with convex ribs that are clamped and matched with the clamping grooves. Through the connection of the clamping grooves and the convex ribs, the stable setting of the containing container in the housing is realized.

[0016] As a preferred embodiment of the present utility model, a collection groove is provided in the housing. The collection groove is communicated with the filtering channel, and the collection groove is connected to a discharge port, and a plug is provided at the discharge port. The collection groove is used to collect solid impurities and moisture, and discharges them after accumulating to a certain amount.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. For a sample injection filter of the present utility model, the gas passing through the filtering channel is filtered by setting a blocking and filtering mechanism to remove solids and moisture in the gas;

[0019] 2. For a sample injection filter of the present utility model, when applied to a gas chromatograph analyzer, it can be quickly connected to a gas sample cylinder through a quick-connect fitting and stably connected to the gas chromatograph analyzer through a union nut;

[0020] 3. For a sample injection filter of the present utility model, it realizes the removal of solids and moisture from the gas collected by the gas sample cylinder, improves the timeliness and accuracy of sample analysis, and avoids impurities from affecting the service life of the instrument. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a sample injection filter for Embodiment 1;

[0022] Figure 2 It is a schematic structural diagram of a sample injection filter for Embodiment 2;

[0023] Figure 3 It is a left view of a sample injection filter for Embodiment 3;

[0024] Figure 4 It is a front view of the second housing in Embodiment 3;

[0025] Figure 5 It is a top view of the second housing described in Embodiment 3;

[0026] Figure 6 is Figure 5 a schematic structural view of the A-A cross-section in

[0027] Figure 7 a schematic structural view of the second housing described in Embodiment 3;

[0028] Figure 8 a schematic structural view of the containing container described in Embodiment 3;

[0029] Markings in the figure: 1 - housing, 11 - first housing, 12 - second housing, 13 - seal, 14 - card slot, 15 - drain port, 16 - collection tank, 2 - filtration channel, 21 - pretreatment chamber, 22 - adsorption chamber, 23 - filtration chamber, 3 - inlet pipeline, 31 - quick connector, 4 - outlet pipeline, 41 - union nut, 5 - blocking and filtering mechanism, 51 - first blocking and filtering mechanism, 52 - second blocking and filtering mechanism, 53 - third blocking and filtering mechanism, 6 - containing container, 61 - convex rib, 7 - isolation mechanism, 8 - plug. Specific embodiments

[0030] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0031] In the description of the specific embodiments of the present invention, without special explanation, the expression terms of orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / equipment of the present invention is commonly used and placed. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present invention or simplifying the description in specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present invention.

[0032] In addition, when terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or deviated. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and it does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in directions such as "horizontal", "vertical", "hanging", "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%, more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still perform its function in the solution of the present utility model.

[0033] In addition, when expressions such as "first", "second", "third",... appear in the terms, they are only 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.

[0034] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation exceeding 9.

[0035] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, when terms such as "set", "installed", "connected", "connected", "provided with", "laid", "arranged" appear, they 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 connection means commonly used in the art such as welding, riveting, bolting, and threaded connection. Such a connection can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components.

[0036] Embodiment 1

[0037] As Figures 1 - 2 shown, a sample injection filter includes a housing 1 made of a stainless steel structural member. The housing 1 is provided with a filter channel 2. The housing 1 is provided with an inlet pipeline 3 and an outlet pipeline 4 that communicate with the filter channel 2. The inlet pipeline 3 and the outlet pipeline 4 are oppositely arranged. The inlet pipeline 3 is provided with a quick connector 31, and the outlet pipeline 4 is provided with a union nut 41. A blocking and filtering mechanism 5 is arranged in the filter channel 2.

[0038] An injection filter according to this embodiment, the housing 1, the inlet pipeline 3 and the outlet pipeline 4 are all made of sulfur-resistant stainless steel structural parts. The housing 1 is a cylindrical structural part with both ends closed. The inlet pipeline 3 and the outlet pipeline 4 are respectively arranged at the two axial ends of the housing 1 to form a filtering channel 2 formed by the sequential connection of the inlet pipeline 3, the inner cavity of the housing 1 and the outlet pipeline 4. A blocking and filtering mechanism 5 is arranged in the filtering channel 2, and the gas passing through the filtering channel 2 is filtered by the blocking and filtering mechanism 5 to remove solids and moisture in the gas. Applied to a gas chromatograph analyzer, it can be quickly connected to a gas sample cylinder through a quick connector 31 and stably connected to the gas chromatograph analyzer through a union nut 41, so as to remove solids and moisture from the gas collected by the gas sample cylinder, improve the timeliness and accuracy of sample analysis, and avoid impurities from affecting the service life of the instrument.

[0039] Preferably, the filtering channel 2 includes a pretreatment chamber 21, an adsorption chamber 22 and a filtering chamber 23 that are sequentially connected. Glass fibers are filled in the pretreatment chamber 21, anhydrous calcium chloride particles are filled in the adsorption chamber, and glass fibers are filled in the filtering chamber 23. And the filling density of the glass fibers in the filtering chamber 23 is less than the filling density of the glass fibers in the pretreatment chamber 21, so that when the gas passes axially along the filtering channel 2, it undergoes gradually refined filtering treatment, and effectively blocks large particles and small particles of solids and dust in the gas.

[0040] It can be understood that the pretreatment chamber 21, the adsorption chamber 22 and the filtering chamber 23 can be selected and set according to actual conditions to meet the filtering treatment requirements of the gas in a specific use environment.

[0041] Embodiment 2

[0042] As Figure 2 shown, an injection filter according to this embodiment has a structure similar to that of Embodiment 1, the difference being that: the pretreatment chamber 21, the adsorption chamber 22 and the filtering chamber 23 are separated by a separation mechanism 7 respectively.

[0043] An injection filter according to this embodiment takes the case where the pretreatment chamber 21, the adsorption chamber 22 and the filtering chamber 23 are simultaneously arranged in the filtering channel 2 as an example for illustration. The adjacent chambers are separated by a fiberglass cloth as the separation mechanism 7. Utilizing the air permeability of the fiberglass cloth, the gas can pass through the separation mechanism 7 smoothly, and utilizing the pore characteristics of the fiberglass cloth, further blocking and filtering of particulate impurities and moisture in the gas are carried out.

[0044] Embodiment 3

[0045] As Figures 1 - 8As shown in the figure, a sample injection filter according to this embodiment has a structure similar to that of Embodiment 1, except that: the housing 1 includes a first housing 11 and a second housing 12 which are hingedly connected. After the first housing 11 and the second housing 12 are buckled, the filtering channel 2 is formed. The inlet pipeline 3 and the outlet pipeline 4 are respectively communicated with the second housing 12, and a flexible sealing member 13 is provided on the buckling surface of the first housing 11 and the second housing 12.

[0046] A sample injection filter according to this embodiment is composed of a first housing 11 and a second housing 12 which are hingedly connected to form a filtering channel 2. The structure is simple, and it is convenient to set and replace the blocking and filtering mechanism 5.

[0047] In this embodiment, preferably, the blocking and filtering mechanism 5 includes a containing container 6. In the containing container 6, the first blocking and filtering mechanism 51, the second blocking and filtering mechanism 52, and the third blocking and filtering mechanism 53 are filled along the gas transmission direction. The filling thicknesses of the first blocking and filtering mechanism 51, the second blocking and filtering mechanism 52, and the third blocking and filtering mechanism 53 are all not greater than 1 cm. The containing container 6 is a mesh structure member. Clamping grooves 14 are respectively provided on the inner walls of the first housing 11 and the second housing 12, and the containing container 6 is provided with convex ribs 61 which are clamped and matched with the clamping grooves 14. In this way, the glass fibers and sewage calcium chloride particles of the blocking and filtering mechanism 5 can be stably contained in the containing container 6, which is convenient to set and replace the blocking and filtering mechanism 5 by replacing the whole containing container 6, and can replace the internally filled blocking and filtering mechanism 5 without separating the housing 1 from the gas sample bottle or the detection instrument, so as to change the filtering treatment effect.

[0048] Preferably, a collection tank 16 is provided in the housing 1. The collection tank 16 is communicated with the filtering channel 2. The collection tank 16 is connected to a discharge port 15, and a plug 8 is provided at the discharge port 15. The collection tank 16 in this embodiment is arranged at the bottom of the second housing 12. The solid impurities and moisture are collected through the collection tank 16 and discharged from the discharge port 15 after accumulating to a certain amount.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sample inlet filter, characterized in that: The invention comprises a housing (1) made of a stainless steel structural member, the housing (1) being provided with a filter channel (2), the housing (1) being provided with an inlet pipe (3) and an outlet pipe (4) communicating with the filter channel (2), the inlet pipe (3) and the outlet pipe (4) being arranged opposite to each other, the inlet pipe (3) being provided with a quick-connect joint (31), the outlet pipe (4) being provided with a union nut (41), and a blocking filter mechanism (5) being provided in the filter channel (2).

2. A sample inlet filter as claimed in claim 1, characterized in that: A pre-treatment chamber (21) is provided in the filtering channel (2), and a first blocking and filtering mechanism (51) is filled in the pre-treatment chamber (21), wherein the first blocking and filtering mechanism (51) comprises glass fibers.

3. A sample inlet filter as claimed in claim 2, characterized in that: An adsorption chamber (22) is provided in the filtration channel (2), and a second blocking and filtering mechanism (52) is filled in the adsorption chamber (22), wherein the second blocking and filtering mechanism (52) comprises anhydrous calcium chloride particles.

4. A sample inlet filter as claimed in claim 3, characterized in that: A filter cavity (23) is provided in the filter channel (2), and a third blocking filter mechanism (53) is filled in the filter cavity (23). The third blocking filter mechanism (53) comprises glass fiber, and the filling density of the third blocking filter mechanism (53) is greater than the filling density of the first blocking filter mechanism (51).

5. A sample inlet filter as claimed in claim 4, characterized in that: The pretreatment chamber (21), the adsorption chamber (22) and the filtration chamber (23) are respectively separated by isolation mechanisms (7).

6. A sample inlet filter as claimed in claim 5, characterized in that: The isolation mechanism (7) comprises glass fiber cloth.

7. A sample inlet filter as claimed in claim 4, characterized in that: The housing (1) comprises a first housing (11) and a second housing (12) which are hingedly connected. The first housing (11) and the second housing (12) are buckled together to form the filtering channel (2). The inlet pipeline (3) and the outlet pipeline (4) are respectively connected to the second housing (12). The buckling surfaces of the first housing (11) and the second housing (12) are provided with a flexible sealing member (13).

8. A sample inlet filter as claimed in claim 7, characterized in that: The blocking and filtering mechanism (5) comprises a containing container (6), wherein the first blocking and filtering mechanism (51) and / or the second blocking and filtering mechanism (52) and / or the third blocking and filtering mechanism (53) are filled in the containing container (6) along the gas conveying direction, wherein the filling thickness of the first blocking and filtering mechanism (51), the second blocking and filtering mechanism (52) and the third blocking and filtering mechanism (53) is no more than 1 cm, and the containing container (6) is a mesh structure.

9. A sample inlet filter as claimed in claim 8, characterized in that: The inner walls of the first shell (11) and the second shell (12) are respectively provided with a clamping groove (14), and the containing container (6) is provided with a convex ridge (61) that is clamped and matched with the clamping groove (14).

10. A sample inlet filter according to any one of claims 1 to 9, characterized in that: A collecting groove (16) is provided in the housing (1), the collecting groove (16) is communicated with the filtering channel (2), the collecting groove (16) is connected to a discharge port (15), and a plug (8) is provided at the discharge port (15).

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