Boiler flue gas sampling device

Abstract

The utility model discloses a boiler flue gas sampling device. The boiler flue gas sampling device comprises a gas outlet pipe, a placing assembly and a sampling assembly, a conical air outlet is formed in the end part of the air outlet pipe, and a plurality of air outlet holes are formed in the air outlet; the placing assembly comprises a mounting frame, a rotating mechanism, a lifting mechanism and a placing disc, and the rotating mechanism capable of driving the placing disc to rotate and the lifting mechanism capable of driving the placing disc to ascend and descend are arranged on the mounting frame; the sampling assembly comprises a sampling pipe, a top cover, a limiting column, a baffle and a spring. The sampling pipe has the advantages that the outer wall of the gas outlet is attached to the inner wall of the sampling through hole during flue gas collection, gas leakage during gas collection is prevented, the sealing performance of the sampling pipe after sampling can be ensured through the baffle and the spring, the sealing performance during collection is further improved, flue gas generated by a boiler can be efficiently collected, and the sampling effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of flue gas collection technology, specifically a boiler flue gas sampling device. Background Technology

[0002] In recent years, environmental protection has received increasing attention, thus requiring the sampling and analysis of flue gas generated by boilers in thermal power plants to optimize boiler combustion. This necessitates the use of boiler flue gas sampling devices. However, during boiler combustion, the composition and proportion of flue gas vary depending on the degree of combustion reaction at different times and the different raw materials used. Most existing flue gas sampling devices adopt direct sampling methods, which reduces the accuracy of the data and makes it less representative, thereby reducing the practicality of the devices.

[0003] To address the aforementioned issues, Chinese utility model patent document CN213842773U discloses a boiler flue gas sampling device. This device includes a motor and a rotating frame to improve accuracy during use, and a second spring and a compression plate to meet the needs of sampling tubes of different specifications, thereby satisfying the sampling requirements of different sampling volumes.

[0004] In actual use, although boiler flue gas can be sampled at different times, the sealing performance at the connection between the sampling port and the flue gas outlet is poor, which can easily cause flue gas to overflow and mix with other gases during sampling, thus affecting the sampling effect. Utility Model Content

[0005] The technical problem to be solved by this utility model is how to ensure the sampling effect.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A boiler flue gas sampling device includes an outlet pipe, a placement component, and a sampling component;

[0008] The end of the air outlet pipe is provided with a conical air outlet, and the air outlet is provided with multiple air holes;

[0009] The placement assembly includes a mounting frame, a rotating mechanism, a lifting mechanism, and a placement tray. The mounting frame is equipped with a rotating mechanism that can drive the placement tray to rotate and a lifting mechanism that can drive the placement tray to rise and fall.

[0010] The sampling assembly includes a sampling tube, a top cover, limiting posts, baffles, and springs. Multiple sampling tubes are placed on a placement tray. The sampling tubes are equipped with a top cover, which has a sampling through hole that allows the air outlet to pass through. The outer wall of the air outlet is in contact with the inner wall of the sampling through hole. Multiple limiting posts are arranged along the periphery of the sampling through hole on the inner wall of the top cover. Baffles are fitted on the limiting posts, and springs are fitted on the limiting posts.

[0011] By ensuring the outer wall of the flue gas outlet fits snugly against the inner wall of the sampling through-hole during flue gas collection, gas leakage is prevented. Furthermore, the baffle and spring ensure the sealing of the sampling tube after sampling, thereby improving the sealing performance during collection. This allows for efficient collection of flue gas generated by the boiler and guarantees the sampling effect.

[0012] Preferably, the air outlet pipe is equipped with a solenoid valve.

[0013] Preferably, the mounting bracket includes an upper mounting plate, a lower mounting plate, and connecting columns, the upper mounting plate and the lower mounting plate are connected by multiple connecting columns, and the air outlet pipe passes through the upper mounting plate.

[0014] Preferably, the rotating mechanism includes a rotating column that can rotate on the mounting frame, the rotating column is provided with a plurality of flat keys, and the placement plate is slidably sleeved on the rotating column and engaged with the flat keys.

[0015] Preferably, the lifting mechanism includes a threaded rod, a wedge block, and a support block. A groove is provided on the mounting frame, the wedge block is engaged in the groove, the threaded rod is connected through the mounting frame and extends into the groove to be threadedly connected to the back of the wedge block, and the end of the wedge block away from the threaded rod is connected to a support block for supporting the placement plate. The support block is provided with a slot that can engage with a flat key.

[0016] Preferably, the mounting bracket is further provided with a plurality of support plates of the same height as the support block.

[0017] Preferably, the placement tray has four placement slots.

[0018] Preferably, the top cover is threadedly connected to the sampling tube.

[0019] Preferably, the diameter of the baffle is larger than the diameter of the sampling through hole.

[0020] Preferably, the spring is always in a compressed state.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. By ensuring the outer wall of the gas outlet fits snugly against the inner wall of the sampling through-hole during flue gas collection, gas leakage is prevented. Additionally, the baffle and spring ensure the sealing of the sampling tube after sampling, thereby improving the sealing performance during collection. This allows for efficient collection of flue gas generated by the boiler and guarantees the sampling effect.

[0023] 2. The flow of flue gas is controlled by a solenoid valve to ensure the accuracy and controllability of the sampling process. Four sets of sampling tubes are provided to collect flue gas from the boiler at different times and under different operating conditions.

[0024] 3. By using the rotating column and flat key, the sampling tube can be switched quickly, easily and conveniently. By rotating the threaded rod to push the wedge block, the height of the sampling tube can be raised to fit the gas outlet for gas sampling. It can also limit the rotation column to ensure stability during flue gas collection and ensure that the gas outlet can be accurately inserted into the sampling tube. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0027] Figure 3 for Figure 1 Enlarged view of A in the middle;

[0028] Figure 4 This is a partial schematic diagram of an embodiment of the present utility model;

[0029] Figure 5 for Figure 4 A magnified view of B in the middle. Detailed Implementation

[0030] To facilitate understanding of the technical solution of this utility model by those skilled in the art, the technical solution of this utility model will now be further described in conjunction with the accompanying drawings.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying contradictory importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited.

[0033] See Figures 1 to 5 This embodiment discloses a boiler flue gas sampling device, including an outlet pipe 1, a placement component 2, and a sampling component 3.

[0034] The air outlet pipe 1 is equipped with a solenoid valve 11 and a conical air outlet 12, and the air outlet 12 is provided with multiple air holes 121.

[0035] The placement assembly 2 includes a mounting frame 21, a rotating mechanism 22, a lifting mechanism 23, and a placement tray 24; the mounting frame 21 includes an upper mounting plate 211, a lower mounting plate 212, and connecting columns 213, and the upper mounting plate 211 and the lower mounting plate 212 are connected by four connecting columns 213.

[0036] The rotating mechanism 22 includes a rotating column that can rotate between the upper mounting plate 211 and the lower mounting plate 212. The rotating column is provided with a plurality of flat keys 221. The placement plate 24 can be vertically slidably sleeved on the rotating column and correspondingly engaged with the flat keys 221.

[0037] The lifting mechanism 23 includes a threaded rod 231, a wedge block 232, and a support block 233. A groove 2121 is provided on the lower mounting plate 212. The wedge block 232 can slide in the direction of the rotating column and is engaged in the groove 2121. The threaded rod 231 passes through the lower mounting plate 212 and extends into the groove 2121 to be threadedly connected to the back of the wedge block 232. The end of the wedge block 232 away from the threaded rod 231 is connected to the support block 233 for supporting the placement plate 24. The support block 233 is provided with a slot 2331 that can engage with the flat key 221.

[0038] The placement tray 24 has four placement slots 241.

[0039] The sampling assembly 3 includes a sampling tube 31, a top cover 32, a limiting post 33, a baffle 34, and a spring 35. The four sampling tubes 31 are placed on the four placement slots 241 respectively. The top cover 32 is threaded onto the sampling tube 31. The top cover 32 has a sampling through hole 321 that allows the air outlet 12 to pass through. The outer wall of the air outlet 12 fits against the inner wall of the sampling through hole 321, so that the air outlet 12 can fit against the inner wall of the sampling through hole 321 after passing through it, thus preventing air leakage during gas collection. Multiple limiting posts 33 are provided on the inner wall of the top cover 32 around the sampling through hole 321. In this embodiment, the limiting posts 33 are bolts, and the screw end of the bolt is connected to the top cover 32. The screw head of the bolt is set away from the top cover 32. A baffle 34 is sleeved on the limiting post 33. A spring 35 that is always in a compressed state is sleeved on the limiting post 33 between the baffle 34 and the screw head, so that the baffle 34 can fit tightly against the sampling through hole 321 and seal it. The diameter of the baffle 34 is larger than the diameter of the sampling through hole 321 to ensure that the baffle 34 can completely seal the sampling through hole 321. Specifically, after the sampling tube 31 rises, the outlet 12 on the outlet pipe 1 passes through the sampling through hole 321 and abuts against the baffle 34, thereby compressing the spring 35 and causing the baffle 34 to move downward, thus connecting the outlet 12 with the sampling tube 31 until the outer wall of the outlet 12 is in contact with the inner wall of the sampling through hole 321, stopping the sampling tube 31 from rising. Then, the solenoid valve 11 is opened to start flue gas collection. Flue gas flows out from the outlet 121 and enters the sampling tube 31. After the collection is completed, the sampling tube 31 moves downward, the outlet 12 on the outlet pipe 1 is pulled out from the sampling through hole 321, and the baffle 34 moves downward under the elastic action of the spring 35 to seal the sampling through hole 321.

[0040] Furthermore, the lower mounting plate 212 is also provided with a plurality of support plates 4 having the same height as the support block 233.

[0041] Furthermore, a sealing ring is provided on the inner wall of the sampling through-hole 321 to further ensure the airtightness of gas collection.

[0042] The installation process in this embodiment is as follows: First, connect the gas outlet pipe 1 to the boiler flue gas pipe. Then, place the four sets of sampling tubes 31 in the placement slots 241 on the placement plate 24. Then, rotate the placement plate 24. At this time, under the action of the flat key 221, the rotating column is driven to rotate between the upper mounting plate 211 and the lower mounting plate 212 until one set of sampling tubes 31 is directly below the gas outlet pipe 1. Then, rotate the threaded rod 231 to push the wedge block 232 to slide towards the rotating column. During the sliding process of the wedge block 232, the placement plate 24 is continuously pushed up until the gas outlet 12 is inserted into the sampling through hole 321 and pushes the baffle 34 to slide down on the limiting post 33. At this time, the spring 35 is compressed and the gas outlet 12 is completely inside the sampling tube 31. The outer wall of the gas outlet 12 is in contact with the inner wall of the sampling through hole 321 to prevent gas collection from being interrupted. When air leaks, the wedge block 232 supports the placement plate 24, and the flat key 221 is inserted into the slot 2331. At this time, the rotating column cannot rotate. Then, open the solenoid valve 11 on the air outlet pipe 1 to inject flue gas into the sampling tube 31. After one set of sampling is completed, rotate the threaded rod 231 to drive the wedge block 232 to reset. At this time, the placement plate 24 can be moved downward and attached to the top of the threaded rod 231 and the support block 233. During the process of pulling out the air outlet 12, the spring 35 pushes the baffle 34 to always be attached to the bottom of the air outlet 12 until the sampling through hole 321 is closed. Take out the completed set of sampling, and then rotate the other set of sampling tubes 31 to the bottom of the air outlet 12. Then, sample at an appropriate time. After all sampling is completed, unscrew the top cover 32 from the sampling tube 31 to sample the flue gas in the sampling tube 31.

[0043] In this embodiment, the outer wall of the exhaust port 12 is fitted against the inner wall of the sampling through-hole 321 during flue gas collection to prevent gas leakage. Furthermore, the baffle 34 and spring 35 ensure the sealing of the sampling tube 31 after sampling, thereby improving the sealing performance during collection. This allows for efficient collection of flue gas generated by the boiler and guarantees the sampling effect. The inflow of flue gas is controlled by the solenoid valve 11 to ensure the accuracy and controllability of the sampling process. Four sets of sampling tubes 31 are provided to collect flue gas from the boiler under different operating conditions at different times.

[0044] In addition, the sampling tube 31 can be switched quickly, easily and conveniently by rotating the column and the flat key 221. By rotating the threaded rod 231 to push the wedge block 232, the height of the sampling tube 31 can be raised to fit the gas outlet 12 for gas sampling. The rotating column can also be limited to ensure stability during flue gas collection and ensure that the gas outlet 12 can be accurately inserted into the sampling tube 31.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] The above-described embodiments are merely examples of implementation methods of the utility model. The scope of protection of this utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the scope of protection of this utility model.

Claims

1. A boiler flue gas sampling device, characterized in that: Includes the vent tube, placement assembly, and sampling assembly; The end of the air outlet pipe is provided with a conical air outlet, and the air outlet is provided with multiple air holes; The placement assembly includes a mounting frame, a rotating mechanism, a lifting mechanism, and a placement tray. The mounting frame is equipped with a rotating mechanism that can drive the placement tray to rotate and a lifting mechanism that can drive the placement tray to rise and fall. The sampling assembly includes a sampling tube, a top cover, limiting posts, baffles, and springs. Multiple sampling tubes are placed on a placement tray. The sampling tubes are equipped with a top cover, which has a sampling through hole that allows the air outlet to pass through. The outer wall of the air outlet is in contact with the inner wall of the sampling through hole. Multiple limiting posts are arranged along the periphery of the sampling through hole on the inner wall of the top cover. Baffles are fitted on the limiting posts, and springs are fitted on the limiting posts.

2. The boiler flue gas sampling device according to claim 1, characterized in that: A solenoid valve is installed on the air outlet pipe.

3. The boiler flue gas sampling device according to claim 1, characterized in that: The mounting bracket includes an upper mounting plate, a lower mounting plate, and connecting columns. The upper mounting plate and the lower mounting plate are connected by multiple connecting columns, and the air outlet pipe passes through the upper mounting plate.

4. The boiler flue gas sampling device according to claim 1, characterized in that: The rotating mechanism includes a rotating column that can rotate on the mounting frame. The rotating column is provided with multiple flat keys, and the placement plate can be slidably sleeved on the rotating column and engaged with the flat keys.

5. A boiler flue gas sampling device according to claim 4, characterized in that: The lifting mechanism includes a threaded rod, a wedge block, and a support block. The mounting frame has a groove, and the wedge block is engaged in the groove. The threaded rod passes through the mounting frame and extends into the groove to be threadedly connected to the back of the wedge block. The end of the wedge block away from the threaded rod is connected to a support block for supporting the placement plate. The support block has a slot that can engage with a flat key.

6. The boiler flue gas sampling device according to claim 1, characterized in that: The mounting bracket is also equipped with multiple support plates of the same height as the support block.

7. A boiler flue gas sampling device according to claim 1, characterized in that: The placement tray has four placement slots.

8. A boiler flue gas sampling device according to claim 1, characterized in that: The top cover is threadedly connected to the sampling tube.

9. A boiler flue gas sampling device according to claim 1, characterized in that: The diameter of the baffle is larger than the diameter of the sampling through hole.

10. A boiler flue gas sampling device according to claim 1, characterized in that: The spring is always in a compressed state.

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