Automatic air exhausting and sampling device for chimney
The automatic flue gas sampling device with a mechanical structure solves the problems of high power consumption and high failure rate of existing devices, and realizes low-energy consumption and easy-to-maintain flue gas sampling, which is suitable for thermal furnaces and kilns.
Patent Information
- Application Number
- CN202423260412.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing flue gas sampling devices operate at high altitudes, and the electric air pumps consume a lot of electricity and have a high failure rate, making maintenance inconvenient and affecting the continuity of environmental monitoring.
The automatic flue gas sampling device with a mechanical structure uses a support mechanism and an auxiliary exhaust mechanism to pressurize the flue gas and send it into the sampling pipe, reducing the electrical system and achieving automatic flue gas sampling through the hood and sampling pipe.
It reduces power consumption, decreases failure rate, facilitates maintenance, adapts to harsh environments, and ensures the continuity and reliability of the flue gas sampling system.
Smart Images
Figure CN223897142U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of flue gas sampling technology, and more specifically, to an automatic chimney extraction and sampling device. Background Technology
[0002] The flue gas from thermal furnaces and kilns contains compounds such as sulfur and nitrates. Before being emitted, it needs to undergo desulfurization and denitrification treatment to meet emission standards. This requires the use of flue gas sampling devices to sample the flue gas and the analysis of the sampled flue gas through CEMS (Continuous Emission Monitoring System) probes. This process is used to detect the emission of pollutants from the flue gas, provide feedback on the adjustment of combustion and desulfurization and denitrification operation status of the furnace and kiln, and achieve environmentally compliant emissions of flue gas.
[0003] However, existing flue gas sampling devices are generally set at an elevation of 20 to 30 meters above the furnace chimney (because the chimney is under a slight negative pressure of -300 to -50 Pa at this location). When sampling flue gas, holes need to be drilled in the chimney, and the flue gas is extracted by an electric air pump and sent to CEMS for analysis before being discharged into the atmosphere. Since environmental data needs to be continuously monitored and uploaded online, the electric air pump needs to run continuously, which consumes a lot of electricity. In addition, due to the high position of the detection platform and the harsh working environment, the electric sampling system has a high failure rate and is inconvenient to maintain and repair, which affects the continuous environmental monitoring of the furnace. Utility Model Content
[0004] The purpose of this application is to provide an automatic chimney air extraction and sampling device that can adapt to harsh working environments, reduce the failure rate of the sampling system, and reduce energy consumption.
[0005] This application provides an automatic chimney air extraction and sampling device, which adopts the following technical solution:
[0006] An automatic chimney extraction and sampling device includes a support mechanism, a cover, and a sampling tube. The support mechanism is disposed inside the chimney, the cover is disposed on the support mechanism, one end of the sampling tube is connected to the cover, and the other end of the sampling tube passes through the chimney and extends to the outside of the chimney.
[0007] Preferably, the sampling device further includes an auxiliary exhaust mechanism, which is disposed on the support mechanism and is used to pressurize the flue gas and send it into the sampling tube.
[0008] Preferably, the support mechanism includes a first bracket, a second bracket, and a third bracket, which are arranged from top to bottom inside the chimney. The upper end of the hood is fixed to the first bracket, the lower end of the hood is fixed to the second bracket, and the auxiliary exhaust mechanism is disposed between the first bracket and the third bracket.
[0009] Preferably, the auxiliary exhaust mechanism includes a rotating rod, a fan, and a spiral blade. One end of the rotating rod is rotatably mounted on the first bracket, and the other end of the rotating rod is rotatably mounted on the third bracket. The fan is located at the lower end of the rotating rod, and the spiral blade is located at the upper end of the rotating rod, with the spiral blade situated inside the cover.
[0010] Preferably, the first bracket is provided with a first bearing, the third bracket is provided with a second bearing, and the two ends of the rotating rod are respectively connected to the first bearing and the second bearing.
[0011] Preferably, the cover gradually decreases in size from bottom to top.
[0012] Preferably, the sampling tube is provided with an exhaust bypass and a first regulating valve, the exhaust bypass is provided with a second regulating valve, and the exhaust bypass is located between the first regulating valve and the chimney.
[0013] Preferably, the end of the exhaust bypass away from the sampling tube passes through the chimney and extends into the interior of the chimney.
[0014] Compared with the prior art, the beneficial effects of this application are as follows:
[0015] The sampling device provided in this application has the advantages of easy maintenance and low failure rate. It is suitable for most existing thermal furnace chimneys. The device is composed of a mechanical structure and has no electrical system, which reduces the loss of electrical energy. During use, some of the rising flue gas will be blocked by the hood, and flue gas will continuously enter the hood. Under the action of airflow pressure, the flue gas inside the hood is squeezed into the sampling tube. The sampling tube sends the flue gas into the CEMS system, thereby completing the automatic flue gas sampling process. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 A schematic diagram of the auxiliary exhaust mechanism in this utility model.
[0019] The reference numerals in the attached figures are as follows:
[0020] 1. Support mechanism; 2. Cover; 3. Sampling tube; 4. Chimney; 5. CEMS system; 6. Auxiliary exhaust mechanism; 7. First support; 8. Second support; 9. Third support; 10. Rotating rod; 11. Fan; 12. Spiral blade; 13. First bearing; 14. Second bearing; 15. Exhaust bypass; 16. First regulating valve; 17. Second regulating valve. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] Example
[0028] like Figure 1 and Figure 2 As shown in the embodiment of this application, the automatic chimney extraction and sampling device includes a support mechanism 1, a cover 2, and a sampling tube 3. The support mechanism 1 is disposed inside the chimney 4, the cover 2 is disposed on the support mechanism 1, one end of the sampling tube 3 is connected to the cover 2, the other end of the sampling tube 3 is connected to the outside of the chimney 4, and the sampling tube 3 is connected to the CEMS system 5.
[0029] During use, some of the rising flue gas will be blocked by the hood 2, and flue gas will continuously enter the hood 2. Under the action of airflow pressure, the flue gas inside the hood 2 will be squeezed into the sampling tube 3. The sampling tube 3 will send the flue gas into the CEMS system 5, thereby completing the automatic flue gas sampling process.
[0030] In this embodiment, in order to facilitate the entry of flue gas into the sampling tube 3, an auxiliary exhaust mechanism 6 is provided on the support mechanism 1. The auxiliary exhaust mechanism 6 is used to pressurize the flue gas and send it into the sampling tube 3.
[0031] In this embodiment, the support mechanism 1 includes a first bracket 7, a second bracket 8, and a third bracket 9. The first bracket 7, the second bracket 8, and the third bracket 9 are arranged from top to bottom inside the chimney 4. The upper end of the cover 2 is fixed on the first bracket 7, and the lower end of the cover 2 is fixed on the second bracket 8. The first bracket 7 and the second bracket 8 together support and fix the cover 2. The auxiliary exhaust mechanism 6 is arranged between the first bracket 7 and the third bracket 9.
[0032] In this embodiment, the auxiliary exhaust mechanism 6 includes a rotating rod 10, a fan 11, and a spiral blade 12. One end of the rotating rod 10 is rotatably mounted on the first bracket 7, and the other end of the rotating rod 10 is rotatably mounted on the third bracket 9. The fan 11 is located at the lower end of the rotating rod 10, and the spiral blade 12 is located at the upper end of the rotating rod 10. The spiral blade 12 is located inside the cover 2.
[0033] During use, the high-velocity flue gas will wash over the fan 11 and cause the fan 11 to rotate. The rotation of the fan 11 will drive the rotating rod 10 to rotate, and the rotating rod 10 will drive the spiral blades 12 to rotate. While the spiral blades 12 are rotating, they will pressurize the flue gas, thus making it easier for the flue gas to enter the sampling tube 3.
[0034] In this embodiment, a first bearing 13 is provided on the first bracket 7, and a second bearing 14 is provided on the third bracket 9. The two ends of the rotating rod 10 are respectively connected to the first bearing 13 and the second bearing 14. The arrangement of the first bearing 13 and the second bearing 14 can reduce the rotational resistance of the rotating rod 10 and ensure the performance of the rotating rod 10.
[0035] In this embodiment, the cover 2 gradually decreases in size from bottom to top, which facilitates the gradual pressurization of the flue gas, making it easier for the flue gas to enter the sampling tube 3.
[0036] In this embodiment, the sampling tube 3 is provided with an exhaust bypass 15 and a first regulating valve 16, and the exhaust bypass 15 is provided with a second regulating valve 17. The exhaust bypass 15 is located between the first regulating valve 16 and the chimney 4. The exhaust bypass 15 can be connected to another CEMS system 5. When the CEMS system 5 corresponding to the sampling tube 3 malfunctions and needs to be repaired / replaced, the first regulating valve 16 is closed and the second regulating valve 17 is opened to deliver the flue gas to the CEMS system 5 corresponding to the exhaust bypass 15.
[0037] In this embodiment, the end of the exhaust bypass 15 away from the sampling pipe 3 passes through the chimney 4 and extends into the interior of the chimney 4. When the CEMS system 5 corresponding to the sampling pipe 3 malfunctions and needs to be repaired / replaced, the first regulating valve 16 is closed and the second regulating valve 17 is opened to allow the flue gas to flow back into the chimney 4. By changing the opening degree of the first regulating valve 16 and the second regulating valve 17, it is convenient to divert the flue gas.
[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. An automatic chimney air extraction and sampling device, characterized in that: It includes a support mechanism, a cover, and a sampling tube. The support mechanism is located inside the chimney, the cover is mounted on the support mechanism, one end of the sampling tube is connected to the cover, and the other end of the sampling tube passes through the chimney and extends to the outside of the chimney.
2. The automatic chimney air extraction and sampling device according to claim 1, characterized in that: It also includes an auxiliary exhaust mechanism, which is mounted on the support mechanism and is used to pressurize the flue gas and send it into the sampling tube.
3. The automatic chimney air extraction and sampling device according to claim 2, characterized in that: The support mechanism includes a first bracket, a second bracket, and a third bracket, which are arranged from top to bottom inside the chimney. The upper end of the hood is fixed to the first bracket, the lower end of the hood is fixed to the second bracket, and the auxiliary exhaust mechanism is disposed between the first bracket and the third bracket.
4. The automatic chimney air extraction and sampling device according to claim 3, characterized in that: The auxiliary exhaust mechanism includes a rotating rod, a fan, and a spiral blade. One end of the rotating rod is rotatably mounted on the first bracket, and the other end of the rotating rod is rotatably mounted on the third bracket. The fan is located at the lower end of the rotating rod, and the spiral blade is located at the upper end of the rotating rod, with the spiral blade positioned inside the cover.
5. The automatic chimney air extraction and sampling device according to claim 4, characterized in that: The first bracket is equipped with a first bearing, the third bracket is equipped with a second bearing, and the two ends of the rotating rod are respectively connected to the first bearing and the second bearing.
6. The automatic chimney air extraction and sampling device according to claim 5, characterized in that: The cover gradually decreases in size from bottom to top.
7. An automatic chimney air extraction and sampling device according to any one of claims 1-6, characterized in that: The sampling tube is equipped with an exhaust bypass and a first regulating valve, and the exhaust bypass is equipped with a second regulating valve. The exhaust bypass is located between the first regulating valve and the chimney.
8. The automatic chimney air extraction and sampling device according to claim 7, characterized in that: The end of the exhaust bypass away from the sampling tube passes through the chimney and extends into the interior of the chimney.