Modularized pre-filter for gas sample analysis

Abstract

The utility model belongs to the technical field of petrochemical sample analysis, and particularly relates to a modularized pre-filter for gas sample analysis. The filter comprises a top cover, a partition filter mechanism, a filter filler section and a bottom cover, a plurality of filter filler sections are arranged; the bottom cover is detachably connected to the lower end of the lowermost filtering filler section; the number of the partition filtering mechanisms is matched with that of the filtering filler sections; the top cover is detachably connected with the uppermost filtering filler section through a partition filtering mechanism, and the adjacent filtering filler sections are detachably connected through a partition filtering mechanism; an air outlet pipe is connected to the top cover, and an air inlet pipe is connected to the lower part of the side wall of the lowermost filter filler section; and a filter material is arranged in each filter filler section. The gas sample pre-filtering device solves the problem of pre-filtering of a sample during gas sample analysis, and has the characteristics of full filtering, convenience in use and strong adaptability. And for different working conditions, rapid reloading and filtering can be realized through modular assembly.

Description

Technical Field

[0001] The utility model belongs to the technical field of petrochemical sample analysis, and particularly relates to a modular pre-filter for gas sample analysis. Background Art

[0002] Currently, when analyzing petrochemical samples, some gas samples inevitably contain moisture or other impurities. Directly analyzing gas samples containing moisture or other impurities not only affects the accuracy of the analysis results but also causes the instrument to malfunction for extended periods. Most prefilters currently available on the market offer a single function and are unsuitable for actual operating conditions. They require customization and have poor adaptability, effectively limiting their application to a single condition. Utility Model Content

[0003] The utility model provides a modular pre-filter for gas sample analysis, which aims to provide a pre-filter device that can solve the problem of pre-filtration of samples during gas sample analysis and is convenient and quick to replace and use under different working conditions.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A modular pre-filter for gas sample analysis, comprising a top cover, a partition filter mechanism, a filter packing section and a bottom cover; the filter packing section is provided with multiple sections; the bottom cover is detachably connected to the lower end of the lowest filter packing section; the number of partition filter mechanisms provided matches the number of filter packing sections provided; the top cover and the uppermost filter packing section, as well as adjacent filter packing sections, are detachably connected via the partition filter mechanism; an air outlet pipe is connected to the top cover, and an air inlet pipe is connected to the lower part of the side wall of the lowest filter packing section; filter material is provided in each filter packing section.

[0006] The filter filling section adopts a circular ring structure made of transparent resin material; connecting threads are respectively provided on the upper and lower end side walls of the filter filling section.

[0007] The partition filter mechanism includes a filter screen and a connecting wall; the shape of the filter screen matches the cross-sectional shape of the filter filler section; the connecting wall is vertically fixed along the four sides of the filter screen; and threads are provided on the connecting wall.

[0008] The filter screen adopts a semi-through structure in which only half of the filter screen has filter holes.

[0009] The filter holes in the upper and lower adjacent semi-through filter screens are staggered on the left and right.

[0010] The top cover is in the shape of a cone with a larger bottom and a smaller top. A pagoda-shaped interface is provided at the top center of the top cover for connecting to the air outlet pipe.

[0011] A pagoda-shaped interface is provided at the lower part of the side wall of the lowest filter filler section for connecting with the air intake pipe.

[0012] Beneficial effects:

[0013] (1) The utility model is composed of a top cover, a partition filter mechanism, a filter packing section and a bottom cover, which solves the problem of pre-filtration of samples during gas sample analysis.

[0014] (2) The utility model adopts multiple filter packing sections to ensure sufficient filtration, and the filter packing sections can be increased or decreased according to the usage scenario.

[0015] (3) The utility model adopts a detachable threaded connection method between the top cover and the upper filter packing section, the upper filter packing section and the middle filter packing section, the middle filter packing section and the lower filter packing section, and the lower filter packing section and the bottom cover. For different working conditions, modular assembly can be used to achieve convenient and quick replacement of filters.

[0016] (4) The filter screen of the utility model adopts a semi-through structure in which only half of the filter screen has filter holes, and the filter holes in the upper and lower adjacent semi-through structures are staggered on the left and right, which increases the gas flow path and enhances the filtering effect.

[0017] (5) The utility model is easy to use and has strong adaptability.

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a structural schematic diagram of the filter screen in the present invention.

[0022] In the figure: 1. Top cover; 2. Partition filter mechanism; 3. Filter filler section; 4. Connecting thread; 5. Inlet pipe; 6. Outlet pipe; 7. Bottom cover; 8. Filter screen; 9. Connecting wall. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1:

[0025] according to Figure 1 and Figure 2 A modular pre-filter for gas sample analysis shown in FIG1 includes a top cover 1, a partition filter mechanism 2, a filter packing section 3 and a bottom cover 7; the filter packing section 3 is provided with multiple sections; the bottom cover 7 is detachably connected to the lower end of the lowest filter packing section 3; the number of partition filter mechanisms 2 provided matches the number of sections provided in the filter packing section 3; the top cover 1 and the uppermost filter packing section 3 and the adjacent filter packing sections 3 are detachably connected via the partition filter mechanism 2 respectively; an air outlet pipe 6 is connected to the top cover 1, and an air inlet pipe 5 is connected to the lower part of the side wall of the lowest filter packing section 3; filter material is provided in each filter packing section 3.

[0026] In actual use, part of the gas samples generated in the production process to be analyzed are passed through the air inlet pipe 5 in sequence through the lower filter filling section 3, the partition filter mechanism 2, the middle filter filling section 3, the partition filter mechanism 2, the upper filter filling section 3, the partition filter mechanism 2, and then discharged from the air outlet pipe 6 on the top cover 1 for sample analysis.

[0027] During the specific installation, the top cover 1 and each filter filler section 3 are connected to the partition filter mechanism 2 through rubber pads, so that the connection is stable and leakage of filter material is avoided.

[0028] The purpose of the partition filter mechanism 2 is to prevent the filter materials from mixing with each other.

[0029] The present invention solves the problem of sample pre-filtration during gas sample analysis. It utilizes multiple filter packing sections for efficient filtration. Removable connections are employed between the top cover 1 and the topmost filter packing section, the intermediate filter packing sections, and the bottommost filter packing section and the bottom cover. Modular assembly allows for convenient and rapid filter changes to accommodate varying operating conditions.

[0030] The utility model is easy to use and has strong adaptability.

[0031] In actual use, the specific number of filter packing segments can be set according to actual requirements.

[0032] Example 2:

[0033] according to Figure 1 The modular pre-filter for gas sample analysis shown is different from the first embodiment in that the filter filling section 3 adopts a circular ring structure made of transparent resin material; connecting threads 4 are respectively provided on the upper and lower end side walls of the filter filling section 3.

[0034] In actual use, the filter filling section 3 adopts a technical solution of a circular structure made of transparent resin material, so that the operator can easily observe the condition of the filter material in each filter filling section 3, and replace the filter material in time when needed, effectively avoiding the waste caused by unnecessary replacement of filter material.

[0035] Connecting threads are respectively provided on the upper and lower side walls of the filter filler section 3, so that the filter material can be easily disassembled and replaced.

[0036] Example 3:

[0037] according to Figure 1 and Figure 2 The modular pre-filter for gas sample analysis shown in the figure is different from the embodiment 1 in that: the partition filter mechanism 2 includes a filter screen 8 and a connecting wall 9; the shape of the filter screen 8 matches the cross-sectional shape of the filter filler section 3; the connecting wall 9 is vertically fixed along the four sides of the filter screen 8; and the connecting wall 9 is provided with a thread.

[0038] Furthermore, the filter screen 8 adopts a semi-through structure in which only half of the filter screen has filter holes.

[0039] Furthermore, the filter holes in the upper and lower adjacent semi-through filter screens 8 are staggered on the left and right.

[0040] In actual use, the setting of the connecting wall 9 in the partition filter mechanism 2 facilitates the disassembly and assembly of the top cover 1 and each section of the partition filter mechanism 2, thereby conveniently realizing the replacement of the filter material, which not only makes the utility model easy to use but also has strong adaptability.

[0041] The filter screen 8 in this embodiment adopts a semi-through structure, which increases the gas flow path and enhances the filtration effect. The filter holes in the upper and lower adjacent semi-through structures 8 are staggered left and right. As the airflow passes through each filter packing section 3, the direction of the path must be changed, thereby improving the filtration effect.

[0042] Example 4:

[0043] according to Figure 1 The modular pre-filter for gas sample analysis shown is different from the first embodiment in that the top cover 1 is a cone with a larger bottom and a smaller top; a pagoda-shaped interface is provided at the top center of the top cover 1 for connecting the outlet pipe 6.

[0044] The top cover 1 is configured to be conical, which can gather the gas sample arriving at the top cover 1 so that the gas sample can flow out of the gas outlet pipe 6 quickly and smoothly.

[0045] Embodiment 5:

[0046] according to Figure 1 The modular pre-filter for gas sample analysis shown is different from the first embodiment in that a pagoda-shaped interface is provided at the lower part of the side wall of the lowest filter filler section 3 for connecting to the air inlet pipe 5.

[0047] In actual use, the connection port located at the lower part of the side wall of the lower filter packing section 3 for connecting to the air inlet pipe 5 is designed to be pagoda-shaped, so that the gas sample entering through the air inlet pipe 5 is buffered and then evenly enters the lowermost filter packing section 3 for filtration, thereby ensuring the filtering effect.

[0048] Example 6:

[0049] Practical application examples of this utility model.

[0050] The filter packing section 3 in this embodiment is provided with three sections: upper, middle and lower; the bottom cover is detachably connected to the lower end of the lower filter packing section; three partition filter mechanisms are provided; the top cover and the upper filter packing section, the upper filter packing section and the middle filter packing section, and the middle filter packing section and the lower filter packing section are detachably connected through partition filter mechanisms respectively; an air outlet pipe is connected to the top cover, and an air inlet pipe is connected to the lower part of the side wall of the lower filter packing section; filter material is provided in each filter packing section.

[0051] The application scenario involves gas samples generated during refinery production. Due to varying production processes and contact media, water vapor may be present in the gas components, such as feed gas from a sulfur recovery unit. When analyzing water-containing gas samples, the lower and middle filter packing sections 3 are filled with anhydrous calcium chloride, while the upper filter packing section 3 is filled with absorbent cotton. Through actual operation, this utility model has demonstrated that its operating conditions meet the maximum water content requirements for chromatographic analysis of gas samples.

[0052] Embodiment seven:

[0053] In actual use, particles in some gas samples can easily clog the instrument's sample inlet line, leading to unstable sample introduction and poor measurement results. When analyzing such gas samples, only the lower filter packing section 3 and the top cover 1 are used, with absorbent cotton as the packing. In actual use, this utility model has been shown to meet the requirements for filtering particles from gas samples under working conditions.

[0054] The utility model can set the number of filter filling segments 3 and add different fillers in different filter filling segments 3 as needed to meet the requirements of different gas sample analysis, thereby expanding its applicable scope.

[0055] In the absence of conflicts, those skilled in the art may combine the relevant technical features in the above examples according to actual circumstances to achieve corresponding technical effects. Specific descriptions of various combinations are omitted here.

[0056] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0058] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to these embodiments, but is intended to conform to the broadest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A modular prefilter for gas sample analysis, characterized by: The invention comprises a top cover (1), a partition filter mechanism (2), a filter packing section (3) and a bottom cover (7); the filter packing section (3) is provided with multiple sections; the bottom cover (7) is detachably connected to the lower end of the lowest filter packing section (3); the number of the partition filter mechanisms (2) provided matches the number of sections provided in the filter packing section (3); the top cover (1) and the uppermost filter packing section (3) and adjacent filter packing sections (3) are detachably connected via the partition filter mechanism (2); an air outlet pipe (6) is connected to the top cover (1), and an air inlet pipe (5) is connected to the lower part of the side wall of the lowest filter packing section (3); filter material is provided in each filter packing section (3).

2. A modular prefilter for gas sample analysis according to claim 1, characterized in that: The filter filler section (3) is an annular structure made of a transparent resin material; connecting threads (4) are respectively provided on the upper and lower end side walls of the filter filler section (3).

3. The modular pre-filter for gas sample analysis according to claim 1, characterized in that: The partition filter mechanism (2) comprises a filter screen (8) and a connecting wall (9); the shape of the filter screen (8) matches the cross-sectional shape of the filter filler section (3); the connecting wall (9) is vertically fixed along the four sides of the filter screen (8); and the connecting wall (9) is provided with a thread.

4. A modular prefilter for gas sample analysis according to claim 3, characterized in that: The filter screen (8) adopts a semi-through structure in which only half of the filter screen has filter holes.

5. A modular pre-filter for gas sample analysis according to claim 4, characterized in that: The filter holes in the upper and lower adjacent semi-through structure filter screens (8) are staggered on the left and right.

6. The modular pre-filter for gas sample analysis according to claim 1, characterized in that: The top cover (1) is in the shape of a cone with a larger bottom and a smaller top. A pagoda-shaped interface is provided at the center of the top of the top cover (1) for connecting to the air outlet pipe (6).

7. The modular pre-filter for gas sample analysis according to claim 1, characterized in that: A pagoda-shaped interface is provided at the lower portion of the side wall of the lowest filtering filler section (3) for connection to the air inlet pipe (5).

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