Multistage filtering type converter flue gas high-temperature sampling and analyzing device

Abstract

The utility model discloses a multistage filter formula converter flue gas high temperature sampling analysis device belongs to converter flue gas sampling technical field, including flue gas analyzer body, inlet pipeline, set up at the bottom of flue gas analyzer body, the inlet pipeline outside is provided with the filter box, the inlet pipeline front end is provided with the detection head, the filter box is provided with primary filter assembly and secondary filter assembly, and converter flue gas passes through primary filter assembly and secondary filter assembly in turn and carries out filtration treatment, and the effect is through setting up primary filter assembly and secondary filter assembly, when converter flue gas enters the filter box in, passes through sintered metal filter screen, sintered stainless steel filter core screen and high temperature ceramic filter screen in turn, can fine filtration to the dust in converter flue gas effectively, and will not cause the problem of the blockage of three, thereby make the detection data more accurate.

Description

Technical Field

[0001] This utility model belongs to the field of converter flue gas sampling technology, and in particular to a multi-stage filtration converter flue gas high-temperature sampling and analysis device. Background Technology

[0002] Converter flue gas refers to the high-temperature, dust-rich gas mixture produced in the iron and steel metallurgical industry during the process of refining molten iron into steel using a converter (a large, tilting, pear-shaped vessel). Sampling and analysis of converter flue gas is a crucial step in the converter steelmaking process, primarily used to monitor flue gas composition and pollutant concentrations to ensure environmental compliance and efficient gas recovery.

[0003] When sampling converter flue gas, in order to ensure that the detected data is accurate enough, a fine filter with extremely small pore size is required to filter the dust in the converter flue gas to obtain accurate detection data. However, when testing converter flue gas with high dust concentration, the large-diameter dust in the converter flue gas can easily clog the filter, requiring frequent replacement, which greatly increases the time cost.

[0004] The purpose of this invention is to provide a multi-stage filtration converter flue gas high-temperature sampling and analysis device to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage filtration converter flue gas high-temperature sampling and analysis device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filtration converter flue gas high-temperature sampling and analysis device, comprising a flue gas analyzer body, an inlet pipe, and a filter box disposed at the bottom of the flue gas analyzer body. A detection head is disposed at the front end of the inlet pipe. A primary filter assembly and a secondary filter assembly are disposed within the filter box. The converter flue gas is filtered sequentially through the primary and secondary filter assemblies. The primary filter assembly includes a sintered metal filter screen disposed within the filter box for intercepting large dust particles. The secondary filter assembly includes a sintered stainless steel filter core mesh and a high-temperature ceramic filter screen disposed within the filter box for sequentially intercepting small particles. The sintered metal filter screen, the sintered stainless steel filter core mesh, and the high-temperature ceramic filter screen are sequentially disposed within the filter box. The mesh size of the sintered stainless steel filter core mesh and the high-temperature ceramic filter screen increases sequentially. The filter holes of the sintered stainless steel filter core mesh and the high-temperature ceramic filter screen are all star-shaped pleated to increase the effective filtration area.

[0007] Furthermore, symmetrical limit plates are provided inside the filter box, and an installation plate is provided inside the limit plate.

[0008] Furthermore, the mounting plate is U-shaped, with symmetrical circular grooves on one side. A connecting post is inserted through the mounting plate, and a third spring is sleeved on the outside of the connecting post. One end of the third spring is connected to the limiting plate, and the other end is connected to the mounting plate.

[0009] Furthermore, an installation frame is provided on the outer side of the sintered metal filter screen, and installation slots are symmetrically opened on both sides of the installation frame. A first spring is provided in each installation slot, and a first sphere adapted to the shape of the circular slot is provided at the end of the first spring.

[0010] Furthermore, the filter box is provided with a limiting groove for the entry of the sintered stainless steel filter element and the high-temperature ceramic filter element. An installation cylinder is provided in the limiting groove, and a second spring is provided in the installation cylinder. The end of the second spring is connected to a second ball. Both the sintered stainless steel filter element and the high-temperature ceramic filter element are provided with a retaining plate with concave sides at the bottom.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention features a primary and secondary filtration system. When converter flue gas enters the filter box, it sequentially passes through a sintered metal filter screen, a sintered stainless steel filter element screen, and a high-temperature ceramic filter screen. This effectively and precisely filters the dust in the converter flue gas without causing blockages, resulting in more accurate test data. Furthermore, the inclusion of mounting plates and cylinders allows for quick installation and replacement of the sintered metal, sintered stainless steel, and high-temperature ceramic filter screens, saving workers time on filter replacement tasks. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the primary and secondary filter components in this utility model; Figure 3 This is a schematic diagram of the mounting frame in this utility model; Figure 4 This is a schematic diagram of the mounting cylinder in this utility model; Figure 5This is a schematic diagram of the structure of the second spring in this utility model; Figure 6 for Figure 4 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the card plate in this utility model.

[0014] Explanation of reference numerals in the attached figures: In the picture: 1. Flue gas analyzer body; 2. Inlet pipe; 3. Filter box; 4. Detector head; 5. Sintered stainless steel filter screen; 6. High-temperature ceramic filter screen; 7. Mounting frame; 8. Limiting groove; 9. Mounting plate; 10. Circular groove; 11. First spring; 12. First sphere; 13. Mounting cylinder; 14. Second sphere; 15. Second spring; 16. Limiting plate; 17. Connecting column; 18. Third spring; 19. Mounting groove; 20. Sintered metal filter screen; 21. Clamping plate. Detailed Implementation

[0015] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0016] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0017] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0018] Please see Figures 1 to 7 As shown, a multi-stage filtration converter flue gas high-temperature sampling and analysis device includes a flue gas analyzer body 1, an inlet pipe 2, and a filter box 3 located at the bottom of the flue gas analyzer body 1. The above are inherent mechanisms of the flue gas analyzer body 1, which are well known to those skilled in the art, and therefore will not be described in detail here. A detection head 4 is provided at the front end of the inlet pipe 2, and a primary filter component and a secondary filter component are provided inside the filter box 3. The converter flue gas is filtered sequentially through the primary filter component and the secondary filter component.

[0019] The primary filtration assembly includes a sintered metal filter screen 20 installed in the filter box 3, used to intercept large dust particles. The sintered metal filter screen 20 has high strength and is resistant to erosion. The secondary filtration assembly includes a sintered stainless steel filter element screen 5 and a high-temperature ceramic filter screen 6 installed in the filter box 3, used to sequentially intercept smaller particles. The sintered metal filter screen 20, the sintered stainless steel filter element screen 5, and the high-temperature ceramic filter screen 6 are sequentially installed in the filter box 3, with the mesh size of the sintered stainless steel filter element screen 5 and the high-temperature ceramic filter screen 6 increasing sequentially. The filter holes of the sintered stainless steel filter element screen 5 and the high-temperature ceramic filter screen 6 are all star-shaped pleated to increase the effective filtration area. The purpose of this arrangement is to achieve finer filtration of dust in the converter flue gas.

[0020] The sintered metal filter mesh 20 is high-strength and erosion-resistant, mainly intercepting abnormally large particles and removing most of the high-concentration, large-particle dust, greatly reducing the load on the downstream precision filter mesh. The sintered stainless steel filter mesh 5 further reduces the dust concentration, preparing for the final fine filtration. The high-temperature ceramic filter mesh 6 is responsible for capturing the finest dust particles, ensuring the cleanliness of the gas reaching the analyzer.

[0021] A limiting plate 16 is symmetrically arranged inside the filter box 3. An installation plate 9 is set inside the limiting plate 16. The installation plate 9 is U-shaped. A circular groove 10 is symmetrically opened on one side of the installation plate 9. A connecting column 17 is inserted through the installation plate 9. A third spring 18 is sleeved on the outside of the connecting column 17. One end of the third spring 18 is connected to the limiting plate 16, and the other end is connected to the installation plate 9. An installation frame 7 is set on the outside of the sintered metal filter screen 20. An installation groove 19 is symmetrically opened on both sides of the installation frame 7. A first spring 11 is set in a single installation groove 19. A first ball 12 that matches the shape of the circular groove 10 is set at the end of the first spring 11. The purpose of this arrangement is to facilitate the first ball 12 to enter the circular groove 10, thereby simply limiting the sintered metal filter screen 20 and keeping it stable in the filter box 3 so that it will not move during the testing process.

[0022] Since the sintered metal filter screen 20 is located at the very front, the impact force is also the greatest when the converter flue gas enters the filter box 3. Through the third spring 18 on the outside of the mounting plate 9 and the connecting column 17, when the converter flue gas impacts the surface of the sintered metal filter screen 20, it causes the mounting plate 9 to slide on the outside of the connecting column 17, thereby compressing or stretching the third spring 18, thus reducing the impact force on the sintered metal filter screen 20 and extending its service life.

[0023] The filter box 3 has a limiting groove 8 for the entry of the sintered stainless steel filter element 5 and the high-temperature ceramic filter element 6. The limiting groove 8 is equipped with an installation cylinder 13, and the installation cylinder 13 is equipped with a second spring 15. The end of the second spring 15 is connected to a second ball 14. The bottom of both the sintered stainless steel filter element 5 and the high-temperature ceramic filter element 6 is equipped with a retaining plate 21 with recessed sides. The purpose of this design is to facilitate the retaining plate 21 to enter between the two second balls 14, so that the second balls 14 are locked in the recesses on both sides of the retaining plate 21, thereby providing simple limiting for the sintered stainless steel filter element 5 and the high-temperature ceramic filter element 6, and also to facilitate the disassembly and replacement by the staff. When the second ball 14 is locked in the recesses on both sides of the retaining plate 21, the second spring 15 is in a natural state.

[0024] Working principle: When the converter flue gas enters through the detection head 4 and then through the inlet pipe 2 into the filter box 3, it passes sequentially through the sintered metal filter screen 20, the sintered stainless steel filter core screen 5, and the high-temperature ceramic filter screen 6. The sintered metal filter screen 20 has high strength and is resistant to erosion. It mainly intercepts abnormally large particles and removes most of the high-concentration, large-particle dust, greatly reducing the load on the downstream precision filter screen. The sintered stainless steel filter core screen 5 further reduces the dust concentration, preparing for the final fine filtration. The high-temperature ceramic filter screen 6 is responsible for capturing the finest dust particles to ensure the cleanliness of the gas reaching the analyzer. When the converter flue gas impacts the surface of the sintered metal filter screen 20 via the third spring 18 on the outside of the mounting plate 9 and the connecting column 17, it causes the mounting plate 9 to slide on the outside of the connecting column 17, thereby compressing or stretching the third spring 18, thus reducing the impact force on the sintered metal filter screen 20. This pulls the sintered stainless steel filter screen 5 and the high-temperature ceramic filter screen 6 outward, causing the clamping plate to leave the second ball 14, thereby squeezing the second ball 14 and causing it to move towards the mounting cylinder 13. This compresses the second spring 15. After being pulled out, the second spring 15 returns to its original shape, pushing the second ball 14 back to its original position.

[0025] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration converter flue gas high-temperature sampling and analysis device, comprising a flue gas analyzer body (1), characterized in that: An air intake pipe (2) is installed at the bottom of the flue gas analyzer body (1). A filter box (3) is installed on the outside of the air intake pipe (2). A detection head (4) is installed at the front end of the air intake pipe (2). The filter box (3) is equipped with a primary filter assembly and a secondary filter assembly. The converter flue gas is filtered through the primary filter assembly and the secondary filter assembly in sequence. The primary filter assembly includes a sintered metal filter screen (20) installed in the filter box (3) to intercept large dust particles. The secondary filter assembly includes a sintered stainless steel filter core screen (5) and a high-temperature ceramic filter screen (6) installed in the filter box (3) to intercept small particles in sequence. The sintered metal filter screen (20), the sintered stainless steel filter core screen (5) and the high-temperature ceramic filter screen (6) are installed in the filter box (3) in sequence. The mesh size of the sintered stainless steel filter core screen (5) and the high-temperature ceramic filter screen (6) increases in sequence. The filter holes of the sintered stainless steel filter core screen (5) and the high-temperature ceramic filter screen (6) are all star-shaped pleated. The multi-layer folds of the star-shaped pleats increase the contact area with dust.

2. The multi-stage filtration converter flue gas high-temperature sampling and analysis device according to claim 1, characterized in that: The filter box (3) is symmetrically provided with limiting plates (16), and the limiting plates (16) are provided with mounting plates (9).

3. The multi-stage filtration converter flue gas high-temperature sampling and analysis device according to claim 2, characterized in that: The mounting plate (9) is U-shaped. Circular grooves (10) are symmetrically opened on one side of the mounting plate (9). A connecting post (17) is installed through the mounting plate (9). A third spring (18) is sleeved on the outside of the connecting post (17). One end of the third spring (18) is connected to the limiting plate (16), and the other end is connected to the mounting plate (9).

4. The multi-stage filtration converter flue gas high-temperature sampling and analysis device according to claim 1, characterized in that: The sintered metal filter screen (20) is provided with an installation frame (7) on the outside. The installation frame (7) is provided with symmetrical installation slots (19) on both sides. A first spring (11) is provided in each installation slot (19). A first ball (12) that matches the shape of the circular groove (10) is provided at the end of the first spring (11).

5. The multi-stage filtration converter flue gas high-temperature sampling and analysis device according to claim 1, characterized in that: The filter box (3) is provided with a limiting groove (8) for the sintered stainless steel filter element (5) and the high-temperature ceramic filter element (6) to enter. The limiting groove (8) is provided with an installation cylinder (13). The installation cylinder (13) is provided with a second spring (15). The end of the second spring (15) is connected to a second ball (14). The bottom of the sintered stainless steel filter element (5) and the high-temperature ceramic filter element (6) are provided with a retaining plate (21) with concave sides.

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