Filtering protection device for flue gas analysis of denitration catalyst

Abstract

The utility model belongs to the technical field of separation devices, and particularly relates to a filter protection device for flue gas analysis of a denitration catalyst, which comprises a filter body, and a gas inlet cap and a gas outlet cap are respectively arranged at two ends of the filter body. A smoke dust rough filtration matrix layer, a moisture trapping medium layer and a smoke dust fine filtration matrix layer are sequentially arranged between the air inlet cap and the air outlet cap, an air inlet connector is formed in the air inlet cap, an air outlet connector is formed in the air outlet cap, the air inlet connector is higher than the air outlet connector, and a second hose is connected to the end, away from the air outlet cap, of the air outlet connector; the end, away from the gas outlet connector, of the second hose is connected with a smoke analyzing and sampling device, a sucking pump and an analyzer are arranged in the smoke analyzing and sampling device in a matched mode, one end of the sucking pump is connected with the second hose, and the other end of the sucking pump is connected with the analyzer. The device can remove dust particles and moisture in industrial flue gas, and can extract enough and stable flue gas samples at the same time.

Description

Technical Field

[0001] The utility model belongs to the technical field of separation devices, and in particular relates to a filtering protection device for flue gas analysis of a denitration catalyst. Background Art

[0002] The key indicators for evaluating the performance of denitrification catalysts include NO x The removal rate, ammonia escape rate and SO2 / SO3 conversion rate are analyzed. x The removal rate reflects the performance of the catalyst and is one of the parameters that catalyst buyers focus on. In practical applications, in order to accurately understand the operating conditions of the catalyst, it is necessary to measure the NO in the flue gas. x However, the flue gas composition of the denitrification catalyst is complex, containing a large amount of dust particles and moisture, which can easily cause the flue gas analysis device to become blocked and damp when entering the flue gas analysis device, thus damaging the device and seriously affecting its normal operation. This not only makes it impossible to detect NO in the flue gas, but also x Long-term, stable and effective monitoring also greatly increases the operation and maintenance costs of the flue gas analysis device, making it difficult to meet the requirements of NO under complex working conditions. x Strict testing requirements.

[0003] Although the flue gas analysis device is equipped with a filter device, its filtering effect has obvious limitations under long-term working conditions. It cannot effectively resist the continuous erosion of dust particles and moisture, and it is difficult to ensure the long-term stable operation of the device. In addition, the current flue gas sampling usually relies on the guide plate to guide the flue gas into the flue gas analysis device. Since the sampling tube is usually set at the negative pressure position of the flue, it is difficult to extract enough flue gas samples by relying solely on the guide plate and the flue gas analysis device, resulting in the instability of the amount and composition of the flue gas entering the flue gas analysis device, affecting the accuracy of the measurement data. Utility Model Content

[0004] The purpose of the utility model is to provide a filtering protection device for flue gas analysis of a denitrification catalyst, which can remove dust particles and moisture in the flue gas to prevent them from entering the flue gas analysis device and causing blockage and damage due to moisture, and at the same time can extract sufficient and stable flue gas samples to achieve accurate monitoring of the operating conditions of the denitrification catalyst.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] The filtering protection device for flue gas analysis of the denitrification catalyst comprises a filter body, an air inlet cap and an air outlet cap are respectively arranged at both ends of the filter body, a smoke coarse filtration matrix layer, a moisture capture medium layer and a smoke fine filtration matrix layer are arranged in sequence between the air inlet cap and the air outlet cap, an air inlet interface is arranged on the air inlet cap, and an air outlet interface is arranged on the air outlet cap. The height of the air inlet interface is higher than that of the air outlet interface. The end of the air outlet interface away from the air outlet cap is connected to hose 2, and the end of hose 2 away from the air outlet interface is connected to a flue gas analysis sampling device. The flue gas analysis sampling device is internally provided with a vacuum pump and an analyzer, one end of the vacuum pump is connected to hose 2, and the other end of the vacuum pump is connected to the analyzer.

[0007] in:

[0008] The end of the air inlet interface away from the air inlet cap is connected to a hose 1, and the end of the hose 1 away from the air inlet interface is connected to a smoke sampling tube.

[0009] An isolation layer 1 is arranged between the smoke coarse filtration matrix layer and the moisture capture medium layer.

[0010] A second isolation layer is arranged between the moisture capture medium layer and the smoke fine filtering matrix layer.

[0011] The isolation layer 1 and the isolation layer 2 are both fixedly arranged inside the filter body.

[0012] The distance between the air inlet cap and the isolation layer 1 is equal to the distance between the isolation layer 1 and the isolation layer 2, and the distance between the isolation layer 1 and the isolation layer 2 is equal to the distance between the isolation layer 2 and the air outlet cap.

[0013] The air inlet cap is provided with an air inlet to match the air inlet interface.

[0014] The air outlet cap is provided with an air outlet to match the air outlet interface.

[0015] The diameter of the air inlet is greater than the diameter of the air outlet.

[0016] The air inlet cap and the air outlet cap are respectively threadedly arranged at two ends of the filter body.

[0017] The beneficial effects of the utility model are:

[0018] By setting up triple filtration of smoke coarse filtration matrix layer, moisture capture medium layer and smoke fine filtration matrix layer, dust particles and moisture in the flue gas can be effectively removed, the device can be avoided from being blocked and damaged by moisture, and the service life of the flue gas analysis device can be extended; the device uses physical methods to filter the smoke and moisture in the flue gas, and will not affect other components in the flue gas, ensuring that the test results are accurate and effective; the height of the air inlet interface is higher than the height of the air outlet interface, so that the smoke can fully contact with the smoke coarse filtration matrix layer, the moisture capture medium layer and the smoke fine filtration matrix layer when passing through the filter body, thereby improving the filtration effect; the vacuum pump provides power for the transportation of the smoke, and can extract sufficient smoke samples to improve the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the filter body in the utility model;

[0021] Figure 3 It is a schematic diagram of the structure of the air intake cap in the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the gas outlet cap in the utility model;

[0023] In the figure:

[0024] 1. Filter body; 2. Air inlet cap; 3. Air outlet cap; 4. Smoke coarse filtration matrix layer; 5. Moisture capture medium layer; 6. Smoke fine filtration matrix layer; 7. Air inlet interface; 8. Air outlet interface; 9. Air pump; 10. Smoke analysis and sampling device; 11. Isolation layer one; 12. Isolation layer two; 13. Hose one; 14. Smoke sampling tube; 15. Hose two; 16. Analyzer. DETAILED DESCRIPTION

[0025] The utility model is described and illustrated in detail below in conjunction with the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-4As shown, the filtering protection device for flue gas analysis of the denitrification catalyst comprises a filter body 1, an air inlet cap 2 and an air outlet cap 3 are respectively arranged at both ends of the filter body 1, a smoke coarse filtration matrix layer 4, a moisture capture medium layer 5 and a smoke fine filtration matrix layer 6 are arranged between the air inlet cap 2 and the air outlet cap 3 in sequence, an air inlet interface 7 is arranged on the air inlet cap 2, and an air outlet interface 8 is arranged on the air outlet cap 3. The height of the air inlet interface 7 is higher than the height of the air outlet interface 8. The end of the air outlet interface 8 away from the air outlet cap 3 is connected to a hose 2 15, and the end of the hose 2 15 away from the air outlet interface 8 is connected to a flue gas analysis sampling device 10. The flue gas analysis sampling device 10 is internally provided with an exhaust pump 9 and an analyzer 16, one end of the exhaust pump 9 is connected to the hose 2 15, and the other end of the exhaust pump 9 is connected to the analyzer 16.

[0028] By setting up triple filtration of the smoke coarse filtration matrix layer 4, the moisture capture medium layer 5 and the smoke fine filtration matrix layer 6, the dust particles and moisture in the smoke can be effectively removed, the device can be avoided from being blocked and damaged by moisture, and the service life of the smoke analysis device can be extended; the device uses physical methods to filter the smoke and moisture in the smoke, will not affect other components in the smoke, and ensures that the test results are accurate and effective; the height of the air inlet interface 7 is higher than the height of the air outlet interface 8, so that the smoke can fully contact the smoke coarse filtration matrix layer 4, the moisture capture medium layer 5 and the smoke fine filtration matrix layer 6 when passing through the filter body 1, thereby improving the filtration effect; the vacuum pump 9 provides power for the transportation of the smoke, and can extract sufficient smoke samples to improve the accuracy of the measurement data.

[0029] The filter medium in the smoke coarse filter matrix layer 4 is quartz wool or absorbent cotton, the filter medium in the moisture capture medium layer 5 is color-changing silica gel or molecular sieve, and the filter medium in the smoke fine filter matrix layer 6 is microfiber.

[0030] The end of the air inlet interface 7 away from the air inlet cap 2 is connected to a hose 13, and the end of the hose 13 away from the air inlet interface 7 is connected to a smoke sampling tube 14. The hose 13 has a certain flexibility and can adapt to different installation environments and angle requirements to avoid sampling difficulties caused by improper arrangement of the smoke sampling tube 14.

[0031] An isolation layer 11 is provided between the smoke coarse filtration matrix layer 4 and the moisture capture medium layer 5.

[0032] An isolation layer 2 12 is provided between the moisture capture medium layer 5 and the smoke fine filter matrix layer 6 .

[0033] The isolation layer 1 11 and the isolation layer 2 12 are both fixedly arranged inside the filter body 1 .

[0034] The distance between the air inlet cap 2 and the isolation layer 1 11 is equal to the distance between the isolation layer 1 11 and the isolation layer 2 12, and the distance between the isolation layer 1 11 and the isolation layer 2 12 is equal to the distance between the isolation layer 2 12 and the air outlet cap 3. When the smoke flows in the filter body 1, the filtering functions of the smoke coarse filtering matrix layer 4, the moisture trapping medium layer 5 and the smoke fine filtering matrix layer 6 can be fully utilized, which helps to improve the overall filtering efficiency and make the smoke quality more stable.

[0035] The air inlet cap 2 is provided with an air inlet to match the air inlet interface 7 .

[0036] The air outlet cap 3 is provided with an air outlet to match the air outlet interface 8 .

[0037] The diameter of the air inlet is greater than the diameter of the air outlet. The air inlet allows the smoke to enter the filter body 1 more smoothly, reducing the air intake resistance. The air outlet can increase the residence time of the smoke in the filter body 1 and improve the filtering effect.

[0038] The air inlet cap 2 and the air outlet cap 3 are respectively threadedly arranged at both ends of the filter body 1. During the daily maintenance of the equipment and replacement of the filter medium, the filter body 1 can be conveniently opened by rotating the air inlet cap 2 and the air outlet cap 3. The operation is simple and quick, and the threaded connection has good sealing performance to prevent smoke leakage.

Claims

1. A filter protection device for flue gas analysis of a denitration catalyst, comprising a filter body (1), characterized in that: An air inlet cap (2) and an air outlet cap (3) are respectively provided at both ends of the filter body (1); a smoke coarse filter matrix layer (4), a moisture capture medium layer (5) and a smoke fine filter matrix layer (6) are sequentially provided between the air inlet cap (2) and the air outlet cap (3); an air inlet interface (7) is provided on the air inlet cap (2); an air outlet interface (8) is provided on the air outlet cap (3); the height of the air inlet interface (7) is higher than the height of the air outlet interface (8); one end of the air outlet interface (8) away from the air outlet cap (3) is connected to a second hose (15); one end of the second hose (15) away from the air outlet interface (8) is connected to a smoke analysis sampling device (10); a suction pump (9) and an analyzer (16) are provided inside the smoke analysis sampling device (10); one end of the suction pump (9) is connected to the second hose (15); and the other end of the suction pump (9) is connected to the analyzer (16).

2. The filter protection device for denitration catalyst flue gas analysis according to claim 1, characterized in that: One end of the air inlet interface (7) away from the air inlet cap (2) is connected to a hose 1 (13), and one end of the hose 1 (13) away from the air inlet interface (7) is connected to a smoke sampling tube (14).

3. The filter protection device for denitration catalyst flue gas analysis according to claim 1, characterized in that: An isolation layer 1 (11) is provided between the smoke coarse filtration matrix layer (4) and the moisture capture medium layer (5).

4. The filter protection device for denitration catalyst flue gas analysis according to claim 3, characterized in that: A second isolation layer (12) is provided between the moisture capture medium layer (5) and the smoke fine filter matrix layer (6).

5. The filter protection device for denitration catalyst flue gas analysis according to claim 4, characterized in that: The first isolation layer (11) and the second isolation layer (12) are both fixedly arranged inside the filter body (1).

6. The filter protection device for denitration catalyst flue gas analysis according to claim 5, characterized in that: The distance between the air inlet cap (2) and the first isolation layer (11) is equal to the distance between the first isolation layer (11) and the second isolation layer (12), and the distance between the first isolation layer (11) and the second isolation layer (12) is equal to the distance between the second isolation layer (12) and the air outlet cap (3).

7. The filter protection device for denitration catalyst flue gas analysis according to claim 1, characterized in that: An air inlet is provided on the air inlet cap (2) to cooperate with the air inlet interface (7).

8. The filter protection device for denitration catalyst flue gas analysis according to claim 7, characterized in that: The air outlet cap (3) is provided with an air outlet in cooperation with the air outlet interface (8).

9. The filter protection device for denitration catalyst flue gas analysis according to claim 8, characterized in that: The diameter of the air inlet is larger than the diameter of the air outlet.

10. The filter protection device for denitration catalyst flue gas analysis according to claim 1, characterized in that: The air inlet cap (2) and the air outlet cap (3) are respectively threadedly arranged at two ends of the filter body (1).

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