Flue gas emission continuous monitoring device based on ejector principle

Abstract

The invention relates to the technical field of flue gas monitoring, in particular to a flue gas emission continuous monitoring device based on an ejector principle. Comprising a flow guide shell, and the lower side of the flow guide shell is fixedly connected and communicated with an air inlet pipe; the valve and the first monitoring module are arranged on the air inlet pipe; the sealing partition plate is fixedly connected to the flow guide shell, the sealing partition plate is rotationally connected with a rotating ring, the rotating ring is provided with a fixed cylinder, the fixed cylinder is fixedly connected with a gas supply shell communicated with the interior of the flow guide shell, and a gas control shell is fixedly connected to the interior of the gas supply shell; and the sliding shell is arranged in the flow guide shell. The ejector principle is adopted, a traditional sampling pump and a pipeline system are replaced, smoke components in the ejector are monitored in real time in combination with a gas analyzer, and after monitoring is completed, smoke can be rapidly ejected out of the ejector, so that the residence time of the smoke in the ejector is shortened, the influence of the smoke on the interior of the ejector is reduced, and the safety of the ejector is improved. And the data accuracy is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas monitoring, and in particular to a flue gas emission continuous monitoring device based on the ejector principle. Background Art

[0002] Governments around the world have introduced a series of strict environmental protection regulations and imposed strict restrictions on industrial emissions. In order to ensure that companies comply with these regulations, a device that can monitor emissions in real time is needed. Against this background, CEMS (Continuous Emission Monitoring System) came into being. CEMS can achieve continuous and accurate monitoring of flue gas pollutants at the source of flue gas emissions, ensuring that gas emissions comply with the requirements of laws and regulations.

[0003] CEMS is mainly composed of a gas analyzer, a sampling unit and a data acquisition unit. Its working principle is as follows: the sampling unit obtains undiluted original flue gas samples from the flue through a sampling pump and sends it to the gas analyzer. The analyzer uses selected technical means (such as non-dispersive infrared absorption method NDIR, ultraviolet differential absorption spectroscopy UV-DOAS, etc.) to determine the specific content of each component. Subsequently, all the obtained data will be sent to the data acquisition unit for further processing, and finally a report will be generated for users to view and use. In this process, when the sampling unit takes samples from flue gas emission sources containing acidic gases (such as sulfur dioxide and nitrogen oxides), the pump parts in the existing sampling unit are susceptible to corrosion. This corrosion not only affects the pump's ventilation capacity, but also reduces the gas flow rate per unit time, ultimately leading to inaccurate monitoring data. Summary of the invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a flue gas emission continuous monitoring device based on the ejector principle.

[0005] The technical implementation scheme of the present invention is: a flue gas emission continuous monitoring device based on the ejector principle, comprising: A guide shell, the lower side of which is fixedly connected to and communicated with an air intake pipe; The valve and the first monitoring module are both arranged on the air intake pipe, and the valve is used to block the air intake pipe; A baffle plate is fixedly connected to the lower part of the guide shell, the baffle plate is rotatably connected to a rotating ring, the rotating ring is provided with a fixed cylinder, the fixed cylinder is fixedly connected to an air supply shell communicating with the guide shell, and an air control shell is fixedly connected to the air supply shell; A sliding shell is disposed in the guide shell, and the sliding shell is used to change the flow area in the guide shell; An air outlet pipe, fixedly connected to and communicated with the upper end of the guide shell; A monitoring component, disposed on the guide shell, for monitoring the gas flowing through the gas delivery shell; A cleaning component is arranged in the guide shell and is used for cleaning the lower part of the guide shell.

[0006] Preferably, the monitoring component comprises: A driving member, arranged on the air outlet pipe; A connecting rod is arranged at the telescopic end of the driving member, and the connecting rod is used to drive the sliding shell to move synchronously. The fixing cylinder and the air delivery shell are jointly fixed with a second monitoring module for monitoring the gas in the air delivery shell.

[0007] Preferably, a flow guide is fixedly connected to the lower end of the sliding shell, and the cross section of the flow guide is triangular, so as to reduce the resistance when the gas contacts the sliding shell.

[0008] Preferably, the cleaning component comprises: The guide ring is fixedly connected to the upper end of the fixed tube. The guide piece is used to squeeze the guide ring. The guide ring is provided with evenly distributed first air outlets and evenly distributed second air outlets.

[0009] Preferably, it also includes: A limiting assembly is arranged on the sealing plate and is used to limit the state of the fixing cylinder. The limiting assembly includes: A protective shell, fixed to the lower side of the sealing plate; The sliding seat is fixed to the fixed cylinder and slides in the protective shell. The rotating ring is connected to the fixed cylinder in a limited sliding manner. The rotating ring is connected to the sealing plate in a limited rotating manner. A first spring is arranged between the sliding seat and the protective shell. Limiting plates that are evenly distributed and used to limit the sliding seat are fixed in the protective shell. An annular groove for the rotation of the sliding seat is arranged in the protective shell.

[0010] Preferably, the limiting plate is composed of a triangular prism at the bottom and a rectangular block at the top, and the triangular prism at the bottom of the limiting plate is used to guide the sliding seat.

[0011] Preferably, the lower side of the connecting rod is rotatably connected with evenly distributed rotating baffles.

[0012] Preferably, it also includes: A driving assembly is disposed in the connecting rod and is used to change the state of evenly distributing the rotating baffles. The driving assembly includes: A sliding rod is fixed to the sliding shell and spline-connected to the connecting rod. A second spring is fixed between the connecting rod and the sliding shell. The connecting rod is slidably connected to the sliding shell. The sliding rod is hinged with hinges that are the same in number as the rotating baffles. The side of the hinge away from the sliding shell is fixed to the adjacent rotating baffle.

[0013] Preferably, the connecting rod is rotatably connected to the telescopic end of the driving member, and when the guide member contacts the guide ring, the guide member is used to drive the guide ring to rotate synchronously.

[0014] Preferably, the caliber of the first gas outlet is larger than that of the second gas outlet, so as to change the flow state of the gas, and the evenly distributed first gas outlets and the evenly distributed second gas outlets are cross-distributed.

[0015] The beneficial effects of the present invention are as follows: in view of the problem of acidic gas corrosion on the sampling unit material encountered in the sampling process of the existing CEMS (continuous emission monitoring system), the present invention proposes an innovative sampling method, which adopts the ejector principle and replaces the traditional sampling pump and pipeline system. In this way, not only can the risk of gas leakage and external pollutants entering be effectively reduced, but also the flue gas composition in the ejector can be monitored in real time in combination with a gas analyzer. After the monitoring is completed, the flue gas can be quickly ejected from the ejector, thereby shortening the residence time of the flue gas in the ejector and reducing the impact of the flue gas on the inside of the ejector, so as to ensure the accuracy of the data; In the process of monitoring the flue gas, the first monitoring module monitors the flue gas in the intake pipe in real time, and the second monitoring module monitors the gas pressure in the gas delivery shell. When insufficient gas pressure is detected (such as pipeline leakage or compressor performance degradation), the system can respond in time, adjust the position of the sliding shell through the driving part, reduce the flow area to increase the local flow rate, compensate for the lack of overall flow, and ensure that the system can still work normally under low gas volume conditions; When it is no longer necessary to monitor the flue gas, the distribution of the internal parts of the guide shell is automatically changed, and the inside of the guide shell is cleaned by blowing air. This not only ensures the cleanliness of the inside of the guide shell, but also improves the reliability and work efficiency of the system, providing a good guarantee for subsequent flue gas monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the parts inside the guide shell of the present invention; Figure 3 It is a three-dimensional structural cross-sectional view of the guide shell of the present invention; Figure 4 It is a three-dimensional structural cross-sectional view of the fixing cylinder of the present invention; Figure 5 It is a three-dimensional structural cross-sectional view of the air delivery shell of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure after the guide member and the guide ring of the present invention are attached together; Figure 7 It is a sectional view of the three-dimensional structure of the guide ring of the present invention after the guide piece and the guide ring are attached; Figure 8 It is a three-dimensional structural cross-sectional view of the protective shell of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the rotating baffle of the present invention; Fig.10 It is a three-dimensional structural cross-sectional view of the sliding shell of the present invention.

[0017] Figure markings: 1-guide shell, 2-inlet pipe, 3-valve, 4-first monitoring module, 5-sealing plate, 6-rotating ring, 7-fixed cylinder, 8-air supply shell, 9-air control shell, 10-sliding shell, 11-outlet pipe, 12-driving member, 13-connecting rod, 14-second monitoring module, 15-guide member, 16-guide ring, 17-first air outlet, 18-second air outlet, 19-protective shell, 20-sliding seat, 21-limiting plate, 22-rotating baffle, 23-sliding rod, 24-hinge. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0019] In order to solve the corrosion problem of the sampling unit material caused by acidic gas during the sampling process of the existing CEMS (continuous emission monitoring system), the present invention proposes a new sampling method based on the ejector principle. This method replaces the traditional sampling pump and pipeline system, which not only effectively reduces the risk of gas leakage and external pollutants entering, but also can be combined with a gas analyzer to monitor the flue gas composition in the ejector in real time. After the monitoring is completed, the flue gas can be quickly discharged from the ejector, thereby greatly shortening the residence time of the flue gas in the ejector and reducing the potential impact of the flue gas on the inside of the ejector. The main advantages mentioned above are: 1. Anti-corrosion design: By reducing the contact time between flue gas and sampling unit materials, the risk of acid gas corrosion to the equipment is significantly reduced; 2. Rapid response: The smoke is discharged quickly, which shortens the cycle of each sampling and improves the response speed of the system; 3. Simplified maintenance: simple structure, reducing maintenance requirements and costs; 4. In-situ monitoring: Based on in-situ monitoring, it avoids the introduction of external pollutants and ensures the accuracy of flue gas monitoring data.

[0020] Example 1: A continuous monitoring device for flue gas emissions based on the ejector principle, such as Figure 1-Figure 7 As shown, it includes: a guide shell 1, the lower side of the guide shell 1 is fixedly connected and connected with an intake pipe 2; a valve 3 and a first monitoring module 4, both of which are arranged on the intake pipe 2, the valve 3 is used to block the intake pipe 2, and the first monitoring module 4 is used to monitor the gas flowing through the intake pipe 2; a baffle plate 5, fixedly connected to the lower part of the guide shell 1, the baffle plate 5 is rotatably connected with a rotating ring 6, the rotating ring 6 is provided with a fixed cylinder 7, the fixed cylinder 7 is fixedly connected to an air supply shell 8 connected with the guide shell 1, and an air control shell 9 is fixedly connected to the air supply shell 8; a sliding shell 10, arranged in the guide shell 1, the sliding shell 10 is used to change the flow area in the guide shell 1; an outlet pipe 11, fixedly connected and connected to the upper end of the guide shell 1; a monitoring component, arranged on the guide shell 1, for monitoring the gas flowing through the air supply shell 8, and a cleaning component, arranged in the guide shell 1, for cleaning the lower part of the guide shell 1.

[0021] In the above scheme, the guide shell 1 is provided with a control terminal (not shown in the figure), and all the power components are electrically connected to the control terminal. The guide shell 1 is composed of two air guide cylinders of different lengths but the same diameter, a connecting cylinder and two truncated cone shells of different lengths but the same diameter. The connecting cylinder is located between the two truncated cone shells, and the two truncated cone shells are located between the two air guide cylinders. The diameter of the connecting cylinder is smaller than the diameter of the air guide cylinder. The guide shell 1 is the main part of the whole device, which is used to guide the gas flow. The valve 3 is used to control the connection state between the air intake pipe 2 and the flue gas duct. The first monitoring module 4 can be an existing infrared transmitter (the infrared transmitter measures the smoke particle content by turbidity method. When infrared light passes through smoke containing smoke, the incident light intensity will be weakened due to the absorption and scattering of particulate matter. By measuring the light intensity attenuation value before and after the light beam passes through the smoke, the smoke concentration value can be quantitatively given).

[0022] like Figure 2-Figure 5 As shown, the monitoring assembly includes: a driving member 12, which is arranged on the air outlet pipe 11; a connecting rod 13, which is arranged on the telescopic end of the driving member 12, and the connecting rod 13 is used to drive the sliding shell 10 to move synchronously. The fixed cylinder 7 and the air supply shell 8 are jointly fixed with a second monitoring module 14 for monitoring the gas in the air supply shell 8, and the lower end of the sliding shell 10 is fixed with a guide member 15, and the cross-section of the guide member 15 is triangular, which is used to reduce the resistance when the gas contacts the sliding shell 10.

[0023] In the above scheme, the driving member 12 is a multi-stage electric push rod, and the second monitoring module 14 is an electric pressure gauge. The pressure of the gas in the air supply shell 8 is monitored by the second monitoring module 14, and the distance that the telescopic end of the driving member 12 drives the sliding shell 10 to move is changed in real time. After the sliding shell 10 enters the connecting tube in the guide shell 1, the flow area in the middle part of the guide shell 1 is reduced, thereby increasing the flow rate of the gas in the guide shell 1.

[0024] Working principle: Before using this device to monitor the flue gas, the staff will first install the device on the smoke exhaust pipe during installation, and then connect the air outlet pipe 11 and the right side of the valve 3 to the smoke exhaust pipe, and finally connect the air supply port of the external air supply device to the lower side of the air supply shell 8, thereby completing the preparation work before smoke monitoring.

[0025] After completing the preparations before smoke monitoring, the staff opens the valve 3 through the control terminal to connect the air inlet pipe 2 with the smoke exhaust pipe, and then turns on the external air supply device through the control terminal, so that the external air supply device sends the gas into the air supply shell 8 through the air supply port thereon, and the air supply shell 8 sends the gas into the air control shell 9 (when the gas flows through the air supply shell 8, the second monitoring module 14 monitors the gas pressure in the air supply shell 8), and the gas is ejected from the upper side of the air control shell 9. After the gas is ejected from the upper side of the air control shell 9, it immediately enters the lower part of the guide shell 1. In the above process, the gas ejected from the air control shell 9 relies on the viscosity between the gas and the air to take away the surrounding air, so that a vacuum low-pressure area is formed in the lower part of the guide shell 1, and the gas in the lower part of the guide shell 1 immediately flows upward, and the gas flowing upward from the lower part of the guide shell 1 contacts the guide member 15, thereby reducing the resistance of the sliding shell 10 until it flows into the outlet pipe 11 and enters the smoke exhaust pipe from the right side of the outlet pipe 11.

[0026] After a vacuum low-pressure zone is formed in the lower part of the guide shell 1, the first monitoring module 4 and the second monitoring module 14 are opened, and the gas in the smoke exhaust pipe immediately enters the air intake pipe 2 through the valve 3, and the air intake pipe 2 guides the smoke to the lower side of the guide shell 1, thereby making the smoke flow upward synchronously with the gas on the lower side of the guide shell 1. In the process of the smoke flowing through the air intake pipe 2, it is monitored by the first monitoring module 4 to realize real-time monitoring of the smoke.

[0027] When the amount of gas ejected from the air delivery shell 8 is less than the amount of gas initially provided due to insufficient gas pressure of the external air delivery device (such as pipeline leakage, decreased compressor performance, etc.) (at this time, the second monitoring module 14 has detected a decrease in pressure in the air delivery shell 8), the amount of gas entering the guide shell 1 is reduced, making it impossible to form sufficient negative pressure in the guide shell 1, thereby reducing the air intake of the air intake pipe 2, and further reducing the amount of flue gas flowing through the air intake pipe 2 at the same time. At this time, the monitored information is transmitted to the control terminal through the second monitoring module 14, and the control terminal controls the telescopic part of the drive member 12 to extend.

[0028] After the telescopic end of the driving member 12 is extended, it drives the connecting rod 13 and its accessory parts to move downward. After the sliding shell 10 moves to the connecting tube in the guide shell 1, the flow area in the middle part of the guide shell 1 is reduced, thereby increasing the flow rate of the gas flowing through the middle part of the guide shell 1. This adjustment is to adapt to the lower pressure and flow conditions of the air supply shell 8, and then compensate for the overall flow shortage by locally increasing the flow rate, ensuring that the system can still maintain the necessary gas flow characteristics under low gas volume conditions, thereby ensuring the continuity and effectiveness of the monitoring and processing process. The above-mentioned monitoring process and monitoring steps can be used continuously when exhausting smoke in the smoke exhaust pipe.

[0029] When it is no longer necessary to monitor the flue gas or the external air supply equipment needs to be repaired, the air supply of the external air supply equipment is stopped, and the air inlet pipe 2 and the guide shell 1 are blocked through the valve 3. Then the control terminal controls the telescopic end of the driving member 12 to drive the parts thereon to move and reset, and shuts down all the above-mentioned electrical components through the control terminal. When long-term monitoring is needed again, the above operation is repeated.

[0030] Embodiment 2: Based on embodiment 1, Figure 4-Figure 7 As shown, the cleaning assembly includes: a guide ring 16 fixed to the upper end of the fixed tube 7, a guide member 15 for squeezing the guide ring 16, and the guide ring 16 is provided with uniformly distributed first air outlets 17 and uniformly distributed second air outlets 18.

[0031] In the above solution, when the lower sides of the first air outlet 17 and the second air outlet 18 are located at the same horizontal plane as the upper side of the rotating ring 6 , the gas ejected from the first air outlet 17 and the second air outlet 18 can clean the inside of the guide shell 1 .

[0032] like Figure 4 , Figure 5 and Figure 8 As shown, it also includes: a limit assembly, which is arranged on the sealing plate 5 and is used to limit the state of the fixed cylinder 7. The limit assembly includes: a protective shell 19, which is fixed to the lower side of the sealing plate 5; a sliding seat 20, which is fixed to the fixed cylinder 7 and slides in the protective shell 19, the rotating ring 6 is connected to the fixed cylinder 7 in a limited sliding manner, and the rotating ring 6 is connected to the sealing plate 5 in a limited rotating manner. A first spring is arranged between the sliding seat 20 and the protective shell 19, and the protective shell 19 is fixed with limit plates 21 that are evenly distributed and used to limit the sliding seat 20. The protective shell 19 is provided with an annular groove for the rotation of the sliding seat 20. The limit plate 21 is composed of a lower triangular prism and an upper rectangular block. The triangular prism at the bottom of the limit plate 21 is used to guide the sliding seat 20.

[0033] In the above scheme, the first spring in the protective shell 19 is used to drive the sliding seat 20 to slide and reset. The sliding seat 20 is limited by all the limit plates 21 so that the sliding seat 20 is no longer in contact with all the limit plates 21. Only then can the sliding seat 20 rotate freely. The first spring in the protective shell 19 only contacts the upper side of the sliding seat 20, and the lower side of the first spring in the protective shell 19 is fixedly connected to the inner side of the protective shell 19.

[0034] like Fig. 9 and Fig.10 As shown, the lower side of the connecting rod 13 is rotatably connected with the evenly distributed rotating baffles 22, and further includes: a driving component, which is arranged in the connecting rod 13 and is used to change the state of the evenly distributed rotating baffles 22, and the driving component includes: a sliding rod 23, which is fixed to the sliding shell 10 and spline-connected with the connecting rod 13, a second spring is fixed between the connecting rod 13 and the sliding shell 10, the connecting rod 13 is slidably connected to the sliding shell 10, and the sliding rod 23 is hinged with hinges 24 with the same number as the rotating baffles 22, and the side of the hinge 24 away from the sliding shell 10 is fixed to the adjacent rotating baffle 22, and the connecting rod 13 is connected to the driving member 12 The telescopic end is rotatably connected. When the guide member 15 contacts the guide ring 16, the guide member 15 is used to drive the guide ring 16 to rotate synchronously. The guide ring 16 is an elliptical ring. The shape of the inner ring edge of the cross section of the guide ring 16 is similar to the outer ring edge of the upper side of the guide member 15, and the area of ​​the surface composed of the inner ring edge of the guide ring 16 is smaller than the area of ​​the upper side of the guide member 15. The cross sections of the guide member 15 and the guide ring 16 are both elliptical, which is used to enable the guide ring 16 to drive the guide member 15 to rotate synchronously. When the guide member 15 is fitted with the guide ring 16, the outlet direction of the air control shell 9 is changed, and the connecting rod 13 is rotatably connected to the telescopic end of the driving member 12.

[0035] In the above scheme, the resistance between the rotating baffle 22 and the gas is changed by changing the state of all the rotating baffles 22. The rotating baffle 22 is composed of a triangular prism at the bottom and a rectangular block at the top. The triangular prism at the bottom of the rotating baffle 22 is used to reduce the resistance of the rotating baffle 22 to the gas in a vertical state. The second spring in the sliding shell 10 is used to ensure that there is still a sliding range between the connecting rod 13 and the sliding shell 10. The elastic coefficient of the second spring in the sliding shell 10 is less than the elastic coefficient of the first spring on the lower side of the sliding seat 20. The hinge 24 is two hinged rods hinged to each other, and the hinge 24 is V-shaped.

[0036] like Figure 4-Figure 7 As shown, the diameter of the first gas outlet 17 is larger than that of the second gas outlet 18, which is used to change the flow state of the gas, and the evenly distributed first gas outlets 17 and the evenly distributed second gas outlets 18 are cross-distributed.

[0037] Working principle: When the guide shell 1 needs to be cleaned or maintained regularly, the control terminal controls the valve 3 to prevent the guide shell 1 from being connected to the intake pipe 2. The control terminal controls the telescopic end of the driving member 12 to move downward. The telescopic end of the driving member 12 drives the attached parts thereon to move through the connecting rod 13 and the sliding shell 10. When the guide member 15 moves to the lower side of the guide member 15 along with the sliding shell 10 and the telescopic end of the driving member 12 to contact the upper side of the guide ring 16, the telescopic end of the driving member 12 continues to move. Under the action of the first spring elastic coefficient on the sliding seat 20 being greater than the second spring elastic coefficient on the sliding shell 10, the fixed cylinder 7 and the guide member 15 remain stationary relative to the connecting rod 13. At this time, the connecting rod 13 is continued to be pushed downward by the telescopic end of the driving member 12. During the movement of the connecting rod 13, relative sliding occurs with the sliding shell 10 (at this time, the second spring on the sliding shell 10 is compressed), and the connecting rod 13 moves along the sliding rod 23.

[0038] During the relative sliding between the connecting rod 13 and the sliding shell 10, the lower sides of all the hinges 24 are squeezed by the sliding rod 23, so that all the hinges 24 are contracted. During the contraction of the lower sides of the hinges 24, the adjacent rotating baffles 22 are driven to swing, so that the rotating baffles 22 gradually change from a vertical state to an inclined state.

[0039] When the upper side of the sliding rod 23 contacts the lower side inside the connecting rod 13, all the rotating baffles 22 are in an inclined state. At this time, when the telescopic end of the driving member 12 continues to move, it can apply an extrusion force to the guide ring 16 through the connecting rod 13, the sliding shell 10, the sliding rod 23 and the guide member 15, so that the guide ring 16 drives the fixed cylinder 7, the air supply shell 8, the sliding seat 20 and its accessory parts to move downward synchronously, and the sliding seat 20 moves along all the limit plates 21 during the movement (the sliding seat 20 squeezes the first spring when moving downward to compress the first spring, and moves along the rotating ring 6 during the movement of the fixed cylinder 7).

[0040] When the above-mentioned parts move to the annular groove of the sliding seat 20 located on the lower side of the protective shell 19, and the lower side surfaces of all the first air outlets 17 and the second air outlets 18 on the guide ring 16 are flush with the upper side surface of the rotating ring 6, the telescopic part of the driving member 12 stops moving. At this time, gas is sent into the air supply shell 8 by the external air supply equipment. After the gas enters the air supply shell 8, it enters between the guide member 15 and the guide ring 16 along the air control shell 9, and then is ejected from all the first air outlets 17 and the second air outlets 18. When the gas is ejected from the first air outlet 17 and the second air outlet 18, due to the different apertures of the two, the gas ejected from the two flows to the edge of the lower part of the guide shell 1, and the gas ejected through the first air outlet 17 and the second air outlet 18 cleans the guide shell 1, and drives the impurities in the guide shell 1 upward, thereby guiding it from the air outlet pipe 11 to the smoke exhaust pipe.

[0041] When the gas moves upward from the guide shell 1, the gas impacts all the rotating baffles 22 in the inclined state, so that all the rotating baffles 22 drive the connecting rod 13 to rotate, and the connecting rod 13 drives the sliding shell 10, the guide member 15, the guide ring 16, the fixed cylinder 7, the sliding seat 20 and its accessory parts to rotate synchronously. Through the rotation of the guide ring 16, the uniformity of the jet from the first gas outlet 17 and the second gas outlet 18 is promoted, thereby strengthening the cleaning of the guide shell 1.

[0042] When it is no longer necessary to clean the inside of the guide shell 1, the external air supply equipment no longer supplies air, and the driving member 12 drives the parts on its telescopic end to move upward and reset. The guide member 15 no longer squeezes the guide ring 16 during the movement of the telescopic end of the driving member 12, so that the guide ring 16 no longer applies a downward squeezing force. Under the action of the first spring on the lower side of the sliding seat 20, the sliding seat 20 drives the fixed cylinder 7 and its accessory parts to move upward and reset. The sliding seat 20 is guided by the triangular prism at the lower part of the limit plate 21, so that the sliding seat 20 can enter between all the limit plates 21 during the upward movement. After the sliding seat 20 moves out of contact with the annular groove in the protective shell 19, the sliding seat 20 drives the parts thereon to move vertically upward.

[0043] When the sliding seat 20 drives the parts thereon to move to Figure 5 After the state is reached, the driving member 12 drives the parts at the telescopic end to continue to move upward, and the second spring in the sliding shell 10 is immediately expanded, so that the connecting rod 13 slides relative to the sliding shell 10, and the connecting rod 13 and the sliding shell 10 gradually move away from each other, so that the sliding rod 23 drives all the hinges 24 to unfold, and the rotating baffle 22 is immediately rotated and reset, so that the rotating baffle 22 is gradually switched from the inclined state to the vertical state.

[0044] The telescopic end of the driving member 12 is reset to Figure 2 After reaching the state in the middle, the telescopic end of the driving member 12 stops moving, and the cleaning of the guide shell 1 is completed at this time.

[0045] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A continuous monitoring device for flue gas emissions based on the ejector principle, characterized in that: include: A guide shell (1), the lower side of which is fixedly connected to and communicated with an air intake pipe (2); The valve (3) and the first monitoring module (4) are both arranged on the air intake pipe (2), and the valve (3) is used to block the air intake pipe (2); A baffle plate (5) is fixedly connected to the lower part of the guide shell (1); the baffle plate (5) is rotatably connected to a rotating ring (6); the rotating ring (6) is provided with a fixed cylinder (7); the fixed cylinder (7) is fixedly connected to an air supply shell (8) which is in communication with the guide shell (1); and an air control shell (9) is fixedly connected to the air supply shell (8); A sliding shell (10) is arranged in the guide shell (1), and the sliding shell (10) is used to change the flow area in the guide shell (1); An air outlet pipe (11) fixedly connected to and in communication with the upper end of the guide shell (1); A monitoring component, arranged on the guide shell (1), and used for monitoring the gas flowing through the gas delivery shell (8); A cleaning component is arranged in the guide shell (1) and is used for cleaning the lower part of the guide shell (1).

2. A flue gas emission continuous monitoring device based on the ejector principle according to claim 1, characterized in that: The monitoring components include: A driving member (12) disposed on the air outlet pipe (11); A connecting rod (13) is arranged at the telescopic end of the driving member (12), and the connecting rod (13) is used to drive the sliding shell (10) to move synchronously. The fixing cylinder (7) and the air supply shell (8) are jointly fixedly connected with a second monitoring module (14) for monitoring the gas in the air supply shell (8).

3. A flue gas emission continuous monitoring device based on the ejector principle according to claim 2, characterized in that: A flow guide (15) is fixedly connected to the lower end of the sliding shell (10); the cross section of the flow guide (15) is triangular and is used to reduce resistance when the gas contacts the sliding shell (10).

4. A flue gas emission continuous monitoring device based on the ejector principle according to claim 3, characterized in that: The cleaning component includes: The guide ring (16) is fixedly connected to the upper end of the fixed cylinder (7), the guide member (15) is used to squeeze the guide ring (16), and the guide ring (16) is provided with evenly distributed first air outlets (17) and evenly distributed second air outlets (18).

5. A flue gas emission continuous monitoring device based on the ejector principle according to claim 4, characterized in that: include: A limit assembly is arranged on the sealing plate (5) and is used to limit the state of the fixed cylinder (7). The limit assembly comprises: A protective shell (19) fixedly connected to the lower side of the sealing plate (5); The sliding seat (20) is fixedly connected to the fixed cylinder (7) and slides in the protective shell (19); the rotating ring (6) is connected to the fixed cylinder (7) in a limited sliding manner; the rotating ring (6) is connected to the sealing plate (5) in a limited rotation manner; a first spring is provided between the sliding seat (20) and the protective shell (19); the protective shell (19) is fixedly provided with uniformly distributed limiting plates (21) for limiting the sliding seat (20); and the protective shell (19) is provided with an annular groove for allowing the sliding seat (20) to rotate.

6. A flue gas emission continuous monitoring device based on the ejector principle according to claim 5, characterized in that: The limiting plate (21) is composed of a triangular prism at the bottom and a rectangular block at the top. The triangular prism at the bottom of the limiting plate (21) is used to guide the sliding seat (20).

7. A flue gas emission continuous monitoring device based on the ejector principle according to claim 5, characterized in that: The lower side of the connecting rod (13) is rotatably connected to evenly distributed rotating baffles (22).

8. A flue gas emission continuous monitoring device based on the ejector principle according to claim 7, characterized in that: include: A drive assembly is arranged in the connecting rod (13) and is used to change the state of evenly distributing the rotating baffles (22). The drive assembly comprises: A sliding rod (23) is fixedly connected to the sliding shell (10) and spline-connected to the connecting rod (13); a second spring is fixedly connected between the connecting rod (13) and the sliding shell (10); the connecting rod (13) is slidably connected to the sliding shell (10); the sliding rod (23) is hingedly connected with hinged parts (24) having the same number as the rotating baffles (22); a side of the hinged parts (24) away from the sliding shell (10) is fixedly connected to an adjacent rotating baffle (22).

9. A flue gas emission continuous monitoring device based on the ejector principle according to claim 8, characterized in that: The connecting rod (13) is rotatably connected to the telescopic end of the driving member (12); when the flow guide member (15) contacts the flow guide ring (16), the flow guide member (15) is used to drive the flow guide ring (16) to rotate synchronously.

10. A flue gas emission continuous monitoring device based on the ejector principle according to claim 9, characterized in that: The caliber of the first gas outlet (17) is greater than the caliber of the second gas outlet (18), and is used to change the flow state of the gas. The evenly distributed first gas outlets (17) and the evenly distributed second gas outlets (18) are cross-distributed.

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