Gas sampling and filtering structure for boiler CEMS analyzer

Abstract

The utility model relates to the technical field of boiler CEMS (continuous emission monitoring system) analyzers, and discloses a gas sampling and filtering structure for a boiler CEMS analyzer, which comprises a gas sampling probe, a connecting pipe is arranged on one side of the gas sampling probe, the lower end of the gas sampling probe is connected with a gas guide pipe, and an adsorption pad is arranged in the gas guide pipe. A gas treatment component is connected to the lower end of the gas guide pipe, a gas inlet pipe is installed at the lower end of the gas treatment component, the gas inlet pipe and a boiler flue gas pipeline are installed in a sealed mode, flue gas generated by a boiler enters a fixing box from the gas inlet pipe, and then a first filter screen and a second filter screen are both used for filtering gas; according to the flue gas cooling device, impurities in flue gas can be filtered out, then the flue gas enters the center hole and flows along the spiral shaft, heat conduction is conducted through the heat conduction layer, the time of the flue gas in the center hole can be prolonged, heat of the flue gas is effectively transmitted to the cold water tank, the flue gas can be cooled, and the purpose of cooling the flue gas can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler CEMS analyzers, in particular to a gas sampling and filtering structure for boiler CEMS analyzers. Background Art

[0002] CEMS analyzers are used to monitor gases emitted by industrial boilers and other equipment. Boiler CEMS analyzers refer to a special monitoring device installed on industrial boilers. They are used to monitor and analyze waste gas emissions generated during boiler combustion in real time. The sampling probe is usually connected to the boiler flue or flue gas duct, which can guide the flue gas into the analyzer for measurement and analysis.

[0003] For example, an air filter device for a CEMS gas analyzer with application number CN215574980U comprises a filter box, the upper end face of the filter box is provided with an inner groove, the inner bottom end of the inner groove is provided with three evenly distributed installation slots, filter frames are movably inserted inside the three installation slots, and a support plate is fixedly connected to the inner bottom end of the filter box. Clean and dry compressed air without dust, rust, oil or water droplets is obtained through two-stage filtration, thereby ensuring the normal operation of the analyzer and extending the service life of the equipment. Finally, the compressed air passes through the third filter layer, which is a zeolite molecular sieve, and can dry the air and purify the pollutants in the air, thus solving the problems of poor filtering effect of the existing air filter device for CEMS gas analyzers, abnormal nitrogen oxide data, large zero drift, and automatic recovery during the day, which affect the normal analysis work.

[0004] The above patent proposes that the air can be dried and pollutants in the air can be purified. However, during the gas sampling and filtering process, since the flue gas discharged from the boiler flue gas pipe has a relatively high temperature, when the gas flows, if the gas is not cooled, it will cause certain damage to the boiler CEMS gas analyzer, which is not conducive to the normal use of the boiler CEMS gas analyzer.

[0005] Therefore, we propose a gas sampling filter structure for a boiler CEMS analyzer to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide a gas sampling and filtering structure for a boiler CEMS analyzer, so as to solve the problem proposed in the above-mentioned background technology that since the flue gas discharged from the boiler flue gas pipe has a relatively high temperature, when the gas flows, if the gas is not cooled, it will cause certain damage to the boiler CEMS gas analyzer, which is not conducive to the normal use of the boiler CEMS gas analyzer.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a gas sampling and filtering structure for a boiler CEMS analyzer, comprising a gas sampling probe, a connecting pipe is arranged on one side of the gas sampling probe, the connecting pipe is connected to the boiler CEMS analyzer through a pipeline, the lower end of the gas sampling probe is connected to an air guide pipe, an adsorption pad is arranged inside the air guide pipe, the lower end of the air guide pipe is connected to a gas processing component, the lower end of the gas processing component is installed with an air intake pipe, the air intake pipe is communicated with the boiler flue gas pipeline, the flue gas can enter the gas processing component from the air intake pipe, the gas processing component is used to process the flue gas, and then the flue gas continues to pass through the air guide pipe, the gas sampling probe and the connecting pipe, and then enters the boiler CEMS analyzer through the pipeline for measurement and analysis;

[0008] The gas processing component includes a fixed box and a cover plate arranged at the front end of the fixed box. A sealing gasket is arranged on the side of the cover plate close to the fixed box. A filtering structure for gas filtering is installed inside the fixed box. A cooling structure is also arranged above the filtering structure. The cooling structure is used to cool the flue gas.

[0009] Preferably, the filtering structure includes a fixed frame arranged inside the fixed box and a first filter screen arranged inside the fixed frame, a second filter screen is arranged on the upper end of the first filter screen, and both the first filter screen and the second filter screen are used to filter the gas.

[0010] Preferably, the cooling structure includes a cold water tank and a center hole opened at the center of the cold water tank. The inner wall of the center hole is evenly coated with a heat conductive layer for heat conduction. A spiral shaft is also provided on the inner side of the center hole. The flue gas enters the center hole after passing through the first filter screen and the second filter screen and flows along the spiral shaft, which can increase the time the flue gas stays in the center hole and achieve the purpose of cooling the flue gas.

[0011] Preferably, a fixing frame is installed on the inner bottom wall of the fixing box, and a moisture absorbing pad for absorbing moisture is arranged at the center of the fixing frame.

[0012] Preferably, a discharge pipe is connected to the side wall of the cold water tank, and the discharge pipe is used to discharge water. A water guide bucket is also provided below the cold water tank.

[0013] Preferably, an opening for water to enter is provided on the side wall of the cold water tank, and a sealing block is provided at the opening of the cold water tank, and the sealing block can seal the opening.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Through the set gas processing components, gas sampling probes, connecting pipes, air guide pipes and air inlet pipes, the flue gas can enter the gas processing components through the air inlet pipe, and the impurities in the flue gas can be filtered by the filtering structure, and the moisture in the flue gas can be absorbed by the moisture-absorbing pad, and then the flue gas temperature can be cooled by the cooling structure to prevent the high-temperature flue gas from entering the boiler CEMS analyzer and causing damage, which is beneficial to the normal use of the boiler CEMS analyzer.

[0016] 2. Through the installation of moisture-absorbing pads and adsorption pads, when the flue gas enters the fixed box from the air inlet pipe, the flue gas will first pass through the moisture-absorbing pads, and the moisture-absorbing pads can absorb the moisture in the flue gas. After the flue gas is cooled, the adsorption pads can be used to absorb the moisture in the flue gas, thereby reducing the moisture content in the flue gas, which is beneficial to the stable operation of the boiler CEMS analyzer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the gas processing component of the utility model;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the cooling structure of the utility model;

[0020] Figure 4 It is a schematic plan view of the fixing frame and the water-absorbing pad structure of the utility model.

[0021] In the figure: 1. gas sampling probe; 2. connecting pipe; 3. air guide pipe; 31. adsorption pad; 4. gas processing component; 41. fixing box; 42. cover plate; 421. sealing pad; 43. filtering structure; 431. fixing frame; 432. first filter screen; 433. second filter screen; 44. cooling structure; 441. cold water tank; 4411. sealing block; 442. center hole; 443. spiral shaft; 444. discharge pipe; 445. heat conductive layer; 446. water guide bucket; 45. fixing frame; 46. moisture absorbing pad; 5. air inlet pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A gas sampling and filtering structure for a boiler CEMS analyzer comprises a gas sampling probe 1, a connecting pipe 2 is arranged on one side of the gas sampling probe 1, the connecting pipe 2 is connected to the boiler CEMS analyzer through a pipeline, the lower end of the gas sampling probe 1 is connected to an air guide pipe 3, an adsorption pad 31 is arranged inside the air guide pipe 3, the lower end of the air guide pipe 3 is connected to a gas processing component 4, an air intake pipe 5 is installed at the lower end of the gas processing component 4, the air intake pipe 5 is communicated with the boiler flue gas pipeline, the flue gas can enter the gas processing component 4 from the air intake pipe 5, the gas processing component 4 is used to process the flue gas, and then the flue gas continues to pass through the air guide pipe 3, the gas sampling probe 1 and the connecting pipe 2, and at the same time, the adsorption pad 31 is used to absorb moisture in the flue gas, and then the flue gas enters the boiler CEMS analyzer through the pipeline for measurement and analysis;

[0024] The gas processing component 4 includes a fixed box 41 and a cover plate 42 arranged at the front end of the fixed box 41. A sealing gasket 421 is arranged on the side of the cover plate 42 close to the fixed box 41 for sealing. A filtering structure 43 for gas filtering is installed inside the fixed box 41. A cooling structure 44 is also arranged above the filtering structure 43. The cooling structure 44 is used to cool the flue gas to prevent the flue gas from containing a high temperature and causing damage to the boiler CEMS analyzer.

[0025] The filtering structure 43 includes a fixed frame 431 arranged inside the fixed box 41 and a first filter screen 432 arranged inside the fixed frame 431. A second filter screen 433 is arranged at the upper end of the first filter screen 432. The first filter screen 432 and the second filter screen 433 are both used to filter the gas, and can filter out impurities in the smoke to prevent the impurities from adhering to the inner wall of the air duct 3 to avoid blockage.

[0026] The cooling structure 44 includes a cold water tank 441 and a center hole 442 opened at the center of the cold water tank 441. The inner wall of the center hole 442 is evenly coated with a heat conductive layer 445 for heat conduction. A spiral shaft 443 is also provided on the inner side of the center hole 442. The flue gas passes through the first filter screen 432 and the second filter screen 433 and enters the center hole 442, and flows along the spiral shaft 443, which can increase the time the flue gas stays in the center hole 442 and achieve the purpose of cooling the flue gas.

[0027] A discharge pipe 444 is also connected to the side wall of the cold water tank 441, and the discharge pipe 444 is used to discharge water. A water guide scoop 446 is also provided below the cold water tank 441. The water guide scoop 446 is installed inside the fixed box 41 through a rod, and the other end of the water guide scoop 446 is connected to a pipe that passes through the fixed box 41 and extends to the outside of the fixed box 41. Condensed water generated during the cooling of the flue gas can be discharged from the water guide scoop 446 to the outside of the fixed box 41.

[0028] An opening for water to enter is provided on the side wall of the cold water tank 441 , and a sealing block 4411 is provided at the opening of the cold water tank 441 . The sealing block 4411 can seal the opening, and cold water can enter the cold water tank 441 from the opening.

[0029] In this embodiment: cold water can enter the cold water tank 441 from the opening and be sealed with the sealing block 4411, and then the air intake pipe 5 and the boiler flue gas pipe are sealed and installed, so that the flue gas generated by the boiler enters the fixed box 41 from the air intake pipe 5, and then the first filter screen 432 and the second filter screen 433 are used to filter the gas, which can filter out impurities in the flue gas to prevent the impurities from adhering to the inner wall of the air guide pipe 3 to avoid blockage, and then the flue gas enters the central hole 442 and flows along the spiral axis 443, and uses the heat conductive layer 445 for heat conduction, which can increase the time of the flue gas in the central hole 442, effectively transfer the heat of the flue gas to the cold water tank 441, and cool the flue gas, thereby achieving the purpose of cooling the flue gas, so as to prevent the flue gas from containing a high temperature and causing damage to the boiler CEMS analyzer, which is beneficial for the boiler CEMS analyzer to measure and analyze the flue gas.

[0030] Embodiment 2: This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 4 A fixing frame 45 is installed on the inner bottom wall of the fixing box 41, and a moisture absorbing pad 46 for absorbing moisture is arranged at the center of the fixing frame 45.

[0031] In this embodiment: when the flue gas enters the fixed box 41 from the air inlet pipe 5, the flue gas will first pass through the moisture absorbing pad 46, and the moisture absorbing pad 46 can absorb the moisture in the flue gas. After the flue gas is cooled, the adsorption pad 31 can be used to absorb the moisture in the flue gas, so as to reduce the moisture content in the flue gas, which is beneficial to the stable operation of the boiler CEMS analyzer.

[0032] Working principle: cold water can enter the cold water tank 441 from the opening and be sealed with the sealing block 4411, and then the air inlet pipe 5 and the boiler flue gas pipe are sealed and installed, so that the flue gas generated by the boiler enters the fixed box 41 from the air inlet pipe 5, and the flue gas will first pass through the moisture absorbing pad 46, and the moisture absorbing pad 46 can absorb the moisture in the flue gas, so that the moisture in the flue gas is reduced, and then the first filter screen 432 and the second filter screen 433 are used to filter the gas, which can filter out impurities in the flue gas, and then the flue gas enters the central hole 442 and flows along the spiral shaft 443, and uses the heat conductive layer 445 for heat conduction, which can increase the time of the flue gas in the central hole 442, effectively transfer the heat of the flue gas to the cold water tank 441, and cool the flue gas.

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas sampling filter structure for a boiler CEMS analyzer, comprising a gas sampling probe (1), characterized in that: A connecting pipe (2) is provided on one side of the gas sampling probe (1), the connecting pipe (2) is connected to the boiler CEMS analyzer through a pipeline, the lower end of the gas sampling probe (1) is connected to an air guide pipe (3), an adsorption pad (31) is provided inside the air guide pipe (3), the lower end of the air guide pipe (3) is connected to a gas processing component (4), the lower end of the gas processing component (4) is installed with an air intake pipe (5), and the air intake pipe (5) is communicated with the boiler flue gas pipeline; The gas processing component (4) comprises a fixed box (41) and a cover plate (42) arranged at the front end of the fixed box (41); a sealing gasket (421) for sealing is arranged on a side of the cover plate (42) close to the fixed box (41); a filter structure (43) for gas filtering is installed inside the fixed box (41); a cooling structure (44) is also arranged above the filter structure (43); the cooling structure (44) is used to cool the flue gas.

2. The gas sampling and filtering structure for a boiler CEMS analyzer according to claim 1, characterized in that: The filtering structure (43) comprises a fixing frame (431) arranged inside the fixing box (41) and a first filter screen (432) arranged inside the fixing frame (431); a second filter screen (433) is arranged at the upper end of the first filter screen (432); and both the first filter screen (432) and the second filter screen (433) are used to filter gas.

3. The gas sampling and filtering structure for a boiler CEMS analyzer according to claim 2, characterized in that: The cooling structure (44) comprises a cold water tank (441) and a central hole (442) opened at the center of the cold water tank (441); the inner wall of the central hole (442) is evenly coated with a heat-conducting layer (445) for heat conduction; and a spiral shaft (443) is also arranged on the inner side of the central hole (442).

4. The gas sampling and filtering structure for a boiler CEMS analyzer according to claim 3 is characterized in that: A fixing frame (45) is installed on the inner bottom wall of the fixing box (41), and a moisture absorbing pad (46) for absorbing moisture is arranged at the center of the fixing frame (45).

5. The gas sampling and filtering structure for a boiler CEMS analyzer according to claim 4, characterized in that: A discharge pipe (444) is also connected to the side wall of the cold water tank (441), and a water guide hopper (446) is also provided below the cold water tank (441).

6. The gas sampling and filtering structure for a boiler CEMS analyzer according to claim 5, characterized in that: An opening for water to enter is provided on the side wall of the cold water tank (441), and a sealing block (4411) is provided at the opening of the cold water tank (441), and the sealing block (4411) can seal the opening.

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