Automatic anti-blocking and anti-skinning multi-stage filtering high-temperature flue gas sampling device

Abstract

The utility model relates to the field of flue gas sampling and filtering, in particular to an automatic anti-blocking and anti-skinning multi-stage filtering high-temperature flue gas sampling device which comprises a scraper cylinder and a rotation driving mechanism used for driving the scraper cylinder to rotate, at least one scraper is arranged on the inner edge of the scraper cylinder, the inner edge of the scraper is attached to the outer edge of a secondary filter, and the outer edge of the secondary filter is attached to the scraper cylinder. According to the automatic anti-blocking and anti-skinning multi-stage filtering high-temperature flue gas sampling device, the surface of a secondary filtering device is prevented from being blocked and skinned by utilizing the continuous rotation of a scraper sleeve, and high-pressure and high-speed blowback gas is matched for blowing, so that automatic cleaning is realized, and the service life of a filter is prolonged; and multi-stage filtration is adopted, a matched analysis instrument is protected, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling and filtration, specifically to a multi-stage filtration high-temperature flue gas sampling device with automatic anti-clogging and anti-scabbing properties. Background Technology

[0002] In continuous emission monitoring systems (CEMS), flue gas is continuously extracted from the chimney as sample gas and transported to the analysis cabinet for sampling and analysis. Therefore, the sampling device plays a crucial role in the flue gas monitoring system. In some complex operating conditions with high dust levels, clogging and corrosion frequently affect sampling. Conventional sampling devices are prone to clogging under conditions with large particles and heavy oil contamination, requiring frequent filter replacements and significantly increasing maintenance costs and workload. To reduce clogging, a single filtration device is often designed, but this filtration effect is poor. Therefore, it is necessary to develop an automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device that can be designed with multi-stage filtration and can automatically clean itself to reduce clogging. Utility Model Content

[0003] The purpose of this invention is to provide an automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] An automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device is provided, including a probe body, a sampling tube, a probe cavity, and a secondary filter. The probe cavity is fixedly installed on the probe body. One end of the sampling tube is connected to one end of the probe cavity. A clamping mechanism is fixedly installed at the other end of the probe cavity. The secondary filter is located in the probe cavity, and one end of the secondary filter is fixedly connected to the clamping mechanism. The clamping mechanism has a sample gas outlet, which is connected to the middle of the secondary filter. The device also includes a scraper cylinder and a rotary drive mechanism for rotating the scraper cylinder. At least one scraper is provided on the inner edge of the scraper cylinder, and the inner edge of the scraper is in contact with the outer edge of the secondary filter.

[0006] Furthermore, a primary filter is installed at the end of the sampling tube, and a tertiary filter is installed inside the secondary filter. The tertiary filter is connected to the sample gas outlet.

[0007] Furthermore, a standard gas inlet is provided on the outer edge of the pressing mechanism. One end of the standard gas inlet is connected to the inside of the scraper cylinder, and an external gas source is used to introduce airflow into the scraper cylinder through the standard gas inlet.

[0008] Furthermore, an annular groove communicating with a standard gas inlet is provided on the inner edge of the clamping mechanism, and one end of the scraper cylinder is covered on the annular groove.

[0009] Furthermore, the rotating mechanism includes a scraper cylinder gear, a motor gear, and a servo motor. The scraper cylinder gear is fixedly installed on the outer edge of the scraper cylinder, the servo motor is fixedly installed on the main body of the probe, and the motor gear is fixedly installed on the output end of the servo motor. The scraper cylinder gear and the motor gear are connected by a transmission chain.

[0010] Furthermore, the primary filter uses steel wire mesh with a pore size of 10μm, the secondary filter uses sintered stainless steel with a pore size of 5μm, and the tertiary filter uses glass fiber with a pore size of 2μm.

[0011] Furthermore, a backflush air inlet is provided on the outer edge of the pressing mechanism. One end of the backflush air inlet is connected to the interior of the three-stage filter, and an external air source is used to introduce airflow into the interior of the three-stage filter through the backflush air inlet.

[0012] The beneficial effects of this utility model are as follows: This automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device uses the continuous rotation of the scraper sleeve to prevent the surface of the secondary filtration device from clogging and forming a crust. Combined with high-pressure and high-speed backflushing air for purging, it achieves automatic cleaning and increases the service life of the filter. In addition, the use of multi-stage filtration protects the supporting analytical instruments and extends their service life. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0014] Figure 1 This is an exploded three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partial front view of the present invention. Figure 1 ;

[0016] Figure 3 for Figure 2 A cross-sectional view along line BB;

[0017] Figure 4 This is a schematic diagram of the flue gas flow direction;

[0018] Figure 5 This is a schematic diagram of the gas flow direction during backflushing of the filter;

[0019] Figure 6 This is a partial front view of the present invention. Figure 2 ;

[0020] Figure 7 for Figure 6 Sectional view along line DD;

[0021] In the diagram: 2. Probe body; 7. Annular groove; 8. Sampling tube; 9. Probe cavity; 10. Clamping mechanism; 12. Standard gas inlet; 13. Scraper cylinder gear; 14. Transmission chain; 15. Motor gear; 16. Primary filter; 17. Secondary filter; 18. Tertiary filter; 19. Backflush gas inlet; 20. Sample gas outlet; 22. Servo motor; 23. Scraper cylinder. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0024] Reference Figures 1 to 7 The illustrated automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device includes a probe body 2, a sampling tube 8, a probe cavity 9, and a secondary filter 17. The probe cavity 9 is fixedly mounted on the probe body 2. One end of the sampling tube 8 is connected to one end of the probe cavity 9. A clamping mechanism 10 is fixedly mounted on the other end of the probe cavity 9. The secondary filter 17 is located inside the probe cavity 9, and one end of the secondary filter 17 is fixedly connected to the clamping mechanism 10. The clamping mechanism 10 has a sample gas outlet 20. The gas outlet 20 is connected to the middle of the secondary filter 17. Flue gas enters the probe cavity 9 along the sampling tube 8 and then exits through the sample gas outlet 20. During this process, the exhaust gas passes through the secondary filter 17 for filtration. The probe also includes a scraper cylinder 23 and a rotary drive mechanism for rotating the scraper cylinder 23. The rotary drive mechanism is fixedly mounted on the probe body 2. At least one scraper is provided on the inner edge of the scraper cylinder 23, and the inner edge of the scraper is in contact with the outer edge of the secondary filter 17. By rotating the scraper cylinder 23 through the rotary drive mechanism, impurities in the secondary filter 17 can be cleaned by scraping.

[0025] A primary filter 16 is installed at the end of the sampling tube 8, and a tertiary filter 18 is installed inside the secondary filter 17. The tertiary filter 18 is connected to the sample gas outlet 20. When the flue gas enters the probe cavity 9 along the sampling tube 8, it passes through the primary filter 16, achieving primary filtration of the flue gas. It then passes through the secondary filter 17 and the tertiary filter 18 before being discharged through the sample gas outlet 20. The secondary filter 17 achieves secondary filtration, and the tertiary filter 18 achieves tertiary filtration. This multi-stage filtration enhances the filtration effect.

[0026] A standard gas inlet 12 is provided on the outer edge of the clamping mechanism 10. One end of the standard gas inlet 12 is connected to the interior of the scraper cylinder 23. An external gas source is used to introduce airflow into the scraper cylinder 23 through the standard gas inlet 12. The airflow blown out along the standard gas inlet 12 enters the interior of the scraper cylinder 23. While the scraper cylinder 23 rotates, the standard gas inlet 12 blows air into it, which allows the scraped-off impurities to be carried away and cleaned by the airflow.

[0027] An annular groove 7, which communicates with the standard gas inlet 12, is provided on the inner edge of the clamping mechanism 10, and one end of the scraper cylinder 23 is covered by the annular groove 7. The airflow is dispersed by the annular groove 7, so that the airflow can fully enter the interior of the scraper cylinder 23, ensuring that there is airflow between every two scrapers.

[0028] The rotating mechanism includes a scraper cylinder gear 13, a motor gear 15, and a servo motor 22. The scraper cylinder gear 13 is fixedly mounted on the outer edge of the scraper cylinder 23, the servo motor 22 is fixedly mounted on the probe body 2, and the motor gear 15 is fixedly mounted on the output end of the servo motor 22. The scraper cylinder gear 13 and the motor gear 15 are connected by a transmission chain 14. By controlling the servo motor 22 to operate, the servo motor 22 drives the scraper cylinder gear 13 to rotate through the motor gear 15 and the transmission chain 14. This causes the scraper cylinder gear 13 to drive the scraper cylinder 23 to rotate, which in turn causes the scraper cylinder 23 to drive the scraper to clean the outer edge of the secondary filter 17.

[0029] The primary filter uses steel wire mesh with a pore size of 10μm, the secondary filter uses sintered stainless steel with a pore size of 5μm, and the tertiary filter uses glass fiber with a pore size of 2μm.

[0030] A backflush air inlet 19 is provided on the outer edge of the pressing mechanism 10. One end of the backflush air inlet 19 is connected to the interior of the tertiary filter 18. An external air source is used to introduce airflow into the tertiary filter 18 through the backflush air inlet 19. By setting the backflush air inlet 19, airflow is introduced into the tertiary filter 18, and the airflow will be discharged along the secondary filter 17, achieving backflush cleaning.

[0031] This automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device uses the continuous rotation of the scraper sleeve to prevent clogging and scaling on the surface of the secondary filter. Combined with high-pressure, high-speed backflushing air, it achieves automatic cleaning and increases the service life of the filter. Furthermore, the multi-stage filtration protects the supporting analytical instruments and extends their service life.

[0032] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device, comprising a probe body (2), a sampling tube (8), a probe cavity (9), and a secondary filter (17), wherein the probe cavity (9) is fixedly installed on the probe body (2), one end of the sampling tube (8) is connected to one end of the probe cavity (9), a clamping mechanism (10) is fixedly installed at the other end of the probe cavity (9), the secondary filter (17) is located inside the probe cavity (9), and one end of the secondary filter (17) is fixedly connected to the clamping mechanism (10), and a sample gas outlet (20) is provided on the clamping mechanism (10), the sample gas outlet (20) being connected to the middle of the secondary filter (17), characterized in that, It also includes a scraper cylinder (23) and a rotary drive mechanism for rotating the scraper cylinder (23). At least one scraper is provided on the inner edge of the scraper cylinder (23), and the inner edge of the scraper is in contact with the outer edge of the secondary filter (17).

2. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 1, characterized in that, The sampling tube (8) is equipped with a primary filter (16) at its end, and a secondary filter (17) is equipped with a tertiary filter (18) inside. The tertiary filter (18) is connected to the sample gas outlet (20).

3. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 1, characterized in that, A standard gas inlet (12) is provided on the outer edge of the pressing mechanism (10). One end of the standard gas inlet (12) is connected to the inside of the scraper cylinder (23). An external gas source is used to introduce airflow into the scraper cylinder (23) through the standard gas inlet (12).

4. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 3, characterized in that, The inner edge of the pressing mechanism (10) is provided with an annular groove (7) that communicates with the standard gas inlet (12), and one end of the scraper cylinder (23) is covered on the annular groove (7).

5. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 1, characterized in that, The rotating mechanism includes a scraper cylinder gear (13), a motor gear (15), and a servo motor (22). The scraper cylinder gear (13) is fixedly installed on the outer edge of the scraper cylinder (23), the servo motor (22) is fixedly installed on the probe body (2), and the motor gear (15) is fixedly installed on the output end of the servo motor (22). The scraper cylinder gear (13) and the motor gear (15) are connected by a transmission chain (14).

6. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 1, characterized in that, The primary filter (16) is made of steel wire mesh with a pore size of 10μm, the secondary filter (17) is made of sintered stainless steel with a pore size of 5μm, and the tertiary filter (18) is made of glass fiber with a pore size of 2μm.

7. The automatic anti-clogging and anti-scabbing multi-stage filtration high-temperature flue gas sampling device as described in claim 2, characterized in that, A backflush inlet (19) is provided on the outer edge of the pressing mechanism (10). One end of the backflush inlet (19) is connected to the interior of the three-stage filter (18). An external air source is used to introduce airflow into the interior of the three-stage filter (18) through the backflush inlet (19).

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