Device for detecting oxygen content of fluidized bed furnace

Abstract

The invention belongs to the technical field of fluidized bed furnace oxygen content detection and discloses a fluidized bed furnace oxygen content detection device which comprises a fluidized bed furnace, an air bellow is mounted at the bottom of the fluidized bed furnace and communicated with an inverted-T-shaped mixing pipe, an air inlet is formed in the end, away from the air bellow, of the inverted-T-shaped mixing pipe and communicated with an air blowing structure, and the inverted-T-shaped mixing pipe is narrow in upper portion and wide in lower portion. A rotating shaft is arranged at the position of a central shaft in the inverted-T-shaped mixing pipe, a plurality of air buffering covers are arranged on the inner wall of the inverted-T-shaped mixing pipe at equal intervals in the length direction of the inverted-T-shaped mixing pipe, air stirring rods are installed at the positions, located between the adjacent air buffering covers, of the rotating shaft, and a transmission structure is installed at the end, close to the air inlet, of the rotating shaft; according to the invention, through the design of a plurality of structures for slowing down the gas flow rate, the gas flow rate can be slowed down on the whole, and a foundation is laid for follow-up gas stirring by the air stirring rod, so that the condition that the gas is not uniformly mixed is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of oxygen content detection of a fluidized bed furnace, and in particular to an oxygen content detection device for a fluidized bed furnace. Background Art

[0002] In the field of gypsum board production, a fluidized bed furnace is required to calcine the fluidized gypsum powder to dehydrate and decompose it into hemihydrate gypsum. During calcination, if the oxygen content in the primary air bellows of the fluidized bed furnace is too low, it will affect the strength and stability of the gypsum board. If the oxygen content is too high, it may destroy the fluidization state in the furnace and affect the uniform calcination of the gypsum. Therefore, during the gypsum board calcination process, the oxygen content in the bellows needs to be tested.

[0003] In order to accurately detect the oxygen concentration in the bellows, the existing technology usually connects a gas mixer between the blower outlet pipe and the bellows inlet pipe to evenly mix the gas in the air. The gas mixer includes a mixing tube connected to the blower outlet pipe at one end, two spiral blades installed in the mixing tube and rotating in opposite directions, and the other end of the mixing tube is connected to the bellows inlet pipe. When the air flows in the mixing tube, it is constantly blocked by the spiral blades, changing the direction of flow to achieve uniform mixing. The mixed gas enters the bellows to help fuel combustion. The burned gas enters the dust removal and dehumidification box to remove impurity particles and water vapor, and finally enters the gas analyzer for detection.

[0004] In the prior art, when a blower blows gas into a gas mixer, the gas flows through the mixing tube at a very fast flow rate, and the spiral blades have difficulty in thoroughly mixing the gas. Summary of the Invention

[0005] To this end, the present invention provides a boiling furnace oxygen content detection device to solve the technical problem in the prior art that the gas passes through the mixing tube at a very fast flow rate and the spiral blades are difficult to mix the gas thoroughly.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A device for detecting oxygen content in a fluidized bed furnace comprises a fluidized bed furnace, wherein a bellows is installed at the bottom of the fluidized bed furnace, an inverted T-shaped mixing pipe is connected to the bellows, an air inlet is provided at the end of the inverted T-shaped mixing pipe away from the bellows, and the air inlet is connected to a blast structure;

[0008] The inverted T-shaped mixing tube is narrow at the top and wide at the bottom, and is formed by coaxially connecting two cylindrical tubes of different diameters, and the air inlet faces away from the opening direction of the cylindrical tube located above;

[0009] A rotating shaft is provided at the central axis position of the inverted T-shaped mixing tube, and a plurality of slow wind covers are provided at equal intervals on the inner wall of the inverted T-shaped mixing tube along its own length direction. The rotating shaft passes through the slow wind covers in sequence, and a stirring rod is installed on the rotating shaft at a position between adjacent slow wind covers;

[0010] A transmission structure is installed at the end of the rotating shaft near the air inlet, and the blowing structure blows gas into the inverted T-shaped mixing tube. The gas flows in the inverted T-shaped mixing tube and drives the transmission structure to operate through the air pressure. The transmission structure drives the rotating shaft and the stirring rod to rotate, so as to stir the gas evenly when the gas passes through the slow wind cover.

[0011] The wind box is provided with an air detection port, the air detection port is connected to a dehumidification and dust removal box, and a gas analyzer is installed at the end of the dehumidification and dust removal box away from the air detection port.

[0012] Furthermore, the wind slowing cover is a hollow conical structure, and the inner diameter of the wind slowing cover gradually decreases along the gas flow direction;

[0013] The wind slowing cover is provided with a plurality of ventilation holes, and a ventilation gap is formed between the end of the wind slowing cover and the rotating shaft.

[0014] Furthermore, the transmission structure includes a transmission gear installed on the end of the rotating shaft close to the air inlet, and a fan gear installed in the inverted T-shaped mixing tube and facing the air inlet;

[0015] The fan gear is away from the opening direction of the cylindrical tube located above, and the fan gear is engaged with the transmission gear;

[0016] When the blower introduces gas into the air inlet, the gas drives the fan gear to rotate, the fan gear drives the transmission gear to rotate, and the transmission gear drives the rotating shaft and the stirring rod to rotate.

[0017] Furthermore, the blowing structure includes a blower, and the air outlet pipe of the blower is connected to the air inlet.

[0018] Furthermore, a limit bearing is installed on the inner wall of the inverted T-shaped mixing tube directly opposite to the fan gear, a connecting rod is installed on the end of the limit bearing away from the inverted T-shaped mixing tube, and the end of the connecting rod away from the limit bearing is connected to the fan gear;

[0019] A fixed bearing is installed on the inner wall of the inverted T-shaped mixing tube opposite to the transmission gear, a rotating rod is installed on the end of the fixed bearing away from the inverted T-shaped mixing tube, and the end of the rotating rod away from the fixed bearing is connected to the transmission gear.

[0020] Furthermore, the air detection port is arranged at a position close to the center of the wind box.

[0021] Furthermore, a movable plate is installed in the dehumidification and dust removal box, and a sticky paper is provided on the movable plate. The end of the movable plate is connected to a driving structure, and the driving structure drives the movable plate and the sticky paper to rotate, so that the gas adheres to the impurity particles in the gas when it circulates in the dust removal and dehumidification box. After the impurity particles and water vapor are removed in the dust removal and dehumidification box, the gas enters the gas analyzer for detection;

[0022] The driving structure includes a driving motor installed outside the dust removal and dehumidification box, a driving shaft connected to the output end of the driving motor, a large pulley installed on the driving shaft, a transmission shaft installed on the side wall of the dust removal and dehumidification box, a small pulley installed on the transmission shaft, and a belt sequentially sleeved on the large pulley and the small pulley;

[0023] The transmission shaft passes through the side wall of the dust removal and dehumidification box and is connected to the movable plate;

[0024] The driving motor drives the driving shaft and the large pulley to rotate, the large pulley drives the belt to rotate, the belt drives the small pulley and the transmission shaft to rotate, and the transmission shaft drives the movable plate to rotate.

[0025] Furthermore, filter screens are installed at the ends of the dust removal and dehumidification box close to the gas detection port and the gas analyzer.

[0026] Furthermore, a condenser is installed in the dust removal and dehumidification box;

[0027] A water outlet pipe is installed at the bottom of the dust removal and dehumidification box, and a water valve is provided on the water outlet pipe.

[0028] Furthermore, an air inlet is provided at the end of the dust removal and dehumidification box close to the air inspection port, a vent pipe is connected between the air inspection port and the air inlet, and a solenoid valve is installed on the vent pipe.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the present invention, the gas blown in by the blowing structure is used as the power source, and the kinetic potential energy of the gas is converted into mechanical potential energy, which can not only drive the stirring rod to rotate, but also slow down the flow speed of the gas, thereby realizing the initial power weakening of the gas. The design of the inverted T-shaped mixing tube with a wide bottom and a narrow top makes the gas experience a change in the flow cross-sectional area from large to small when flowing in the inverted T-shaped mixing tube. When the flow cross-sectional area becomes smaller, the resistance to gas transportation is increased, and the gas flow speed is further slowed down. The design of the slow wind hood also makes the gas experience the process of the flow cross-section changing from large to small many times during the flow in the inverted T-shaped mixing tube, thereby slowing down the gas flow speed. Through the design of multiple structures for slowing down the gas flow rate, the gas flow rate can be slowed down as a whole, laying the foundation for the subsequent stirring rod to stir the gas, thereby avoiding the situation where the gas is not mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0032] Figure 1 A schematic diagram of the overall structure of a device for detecting oxygen content in a fluidized bed furnace provided by an embodiment of the present invention;

[0033] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of A;

[0034] Figure 3 Schematic diagram of the driving structure and the internal structure of the dust removal and dehumidification box in an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the internal structure of the inverted T-shaped mixing tube in an embodiment of the present invention;

[0036] Figure 5 Schematic diagram of the overall structure of the transmission structure in an embodiment of the present invention.

[0037] The numbers in the figure represent the following:

[0038] 1- Boiling furnace; 2- Bellows; 3- Inverted T-shaped mixing tube; 4- Air inlet; 5- Blower; 6- Rotating shaft; 7- Slow wind hood; 8- Stirring rod; 9- Transmission structure; 10- Gas inspection port; 11- Dehumidification and dust removal box; 12- Gas analyzer; 13- Movable plate; 14- Adhesive paper; 15- Limit bearing; 16- Connecting rod; 17- Fixed bearing; 18- Driving motor; 19- Driving shaft; 20- Large pulley; 21- Transmission shaft; 22- Small pulley; 23- Belt; 24- Filter; 25- Condenser; 26- Water outlet pipe; 27- Water valve; 28- Air inlet; 29- Ventilation pipe; 30- Solenoid valve; 31- Rotating rod;

[0039] 901- transmission gear; 902- fan gear. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figure 1 、 Figure 4 As shown, the present invention provides a device for detecting oxygen content in a fluidized bed furnace, comprising a fluidized bed furnace 1, a bellows 2 installed at the bottom of the fluidized bed furnace 1, an inverted T-shaped mixing pipe 3 connected to the bellows 2, an air inlet 4 provided at the end of the inverted T-shaped mixing pipe 3 away from the bellows 2, and the air inlet 4 connected to a blast structure;

[0042] The inverted T-shaped mixing tube 3 is narrow at the top and wide at the bottom, and is formed by coaxially connecting two cylindrical tubes of different diameters. The air inlet 4 faces away from the opening direction of the upper cylindrical tube.

[0043] A rotating shaft 6 is provided at the central axis position of the inverted T-shaped mixing tube 3. A plurality of slow wind covers 7 are provided at equal intervals along the inner wall of the inverted T-shaped mixing tube 3 along its own length direction. The rotating shaft 6 passes through the slow wind covers 7 in sequence. A stirring rod 8 is installed on the rotating shaft 6 between adjacent slow wind covers 7.

[0044] Among them, a transmission structure 9 is installed at the end of the rotating shaft 6 near the air inlet 4. The blowing structure blows gas into the inverted T-shaped mixing tube 3. The gas circulates in the inverted T-shaped mixing tube 3 and drives the transmission structure 9 to operate through the air pressure. The transmission structure 9 drives the rotating shaft 6 and the stirring rod 8 to rotate, so as to stir the gas evenly when the gas passes through the slow wind cover 7;

[0045] The wind box 2 is provided with an air detection port 10 , which is connected to a dehumidification and dust removal box 11 . A gas analyzer 12 is installed at the end of the dehumidification and dust removal box 11 away from the air detection port 10 .

[0046] In the present invention, the gas blown in by the blowing structure is used as the power source, and the kinetic potential energy of the gas is converted into mechanical potential energy, which can not only drive the stirring rod 8 to rotate, but also slow down the flow speed of the gas, thereby realizing the initial power weakening of the gas. The design of the inverted T-shaped mixing tube 3 with a wide bottom and a narrow top makes the gas experience a change in the flow cross-sectional area from large to small when flowing in the inverted T-shaped mixing tube 3. When the flow cross-sectional area becomes smaller, the resistance to gas transportation is increased, and the gas flow speed is further slowed down. The design of the slow wind hood 7 also makes the gas experience the process of the flow cross-section changing from large to small many times during the flow in the inverted T-shaped mixing tube 3, thereby slowing down the gas flow speed. Through the design of multiple structures for slowing down the gas flow rate, the gas flow rate can be slowed down as a whole, laying the foundation for the subsequent stirring rod 8 to stir the gas, thereby avoiding the situation where the gas is not mixed.

[0047] like Figure 4 As shown, the slow wind hood 7 is a hollow conical structure, and the inner diameter of the slow wind hood 7 gradually decreases along the gas flow direction. A number of ventilation holes are provided on the slow wind hood 7, and a ventilation gap is formed between the end of the slow wind hood 7 and the rotating shaft 6. The inner diameter of the slow wind hood 7 gradually decreases, so that the gas flows out with a smaller flow cross-sectional area when passing through the slow wind hood 7. The amount of gas flowing out each time is small, which is convenient for the stirring work of the stirring rod 8. When passing through the slow wind hood 7, the gas can not only flow out from the ventilation gap, but also flow out from the ventilation holes, avoiding the situation where the gas is gathered in the ventilation gap and cannot be fully stirred.

[0048] like Figure 2 、 Figure 4 、 Figure 5 As shown, the blower 5 blows gas into the bellows 2, and the stirring rod 8 rotates to stir the gas. Therefore, the design of the present invention utilizes the gas blown by the blower 5 to drive the stirring rod 8 to rotate. Specifically, the transmission structure 9 includes a transmission gear 901 installed at the end of the rotating shaft 6 close to the air inlet 4, and a fan gear 902 installed in the inverted T-shaped mixing tube 3 and facing the air inlet 4;

[0049] The fan gear 902 is away from the opening of the cylindrical tube located above, and the fan gear 902 is meshed with the transmission gear 901;

[0050] When the blower 5 introduces gas into the air inlet 4, the gas drives the fan gear 902 to rotate, the fan gear 902 drives the transmission gear 901 to rotate, and the transmission gear 901 drives the rotating shaft 6 and the stirring rod 8 to rotate;

[0051] The fan gear 902 can convert the pressure potential energy of the gas into mechanical energy, thereby driving the transmission gear 901 to rotate. In order to speed up the rotation speed of the transmission gear 901 and enable the transmission gear 901 to drive the stirring rod 8 to homogenize the gas in a short time when the gas flows slowly, a fan gear 902 can be set on each side of the transmission gear 901, and the fans in the fan gear 902 rotate in opposite directions. At the same time, the air inlet 4 can be set to two, so that each fan gear 902 faces an air inlet 4. When the blower 5 blows gas into the air inlet 4, the two fan gears 902 rotate in opposite directions to drive the transmission gear 901 to rotate, thereby ensuring the rotation speed of the transmission gear 901.

[0052] In order to blow gas into the inverted T-shaped mixing tube 3, the blowing structure includes a blower 5, the air outlet pipe of the blower 5 is connected to the air inlet 4, and the gas enters the inverted T-shaped mixing tube 3 from the air inlet 4, and then enters the bellows 2 from the inverted T-shaped mixing tube 3.

[0053] The fan gear 902 is arranged in the inverted T-shaped mixing tube 3 and drives the transmission gear 901 to rotate. Therefore, the transmission gear 901 needs to be rotatably fixed in the inverted T-shaped mixing tube 3. In order to make the fan gear 902 rotatably fixed to the inner wall of the inverted T-shaped mixing tube 3, a limit bearing 15 is installed on the inner wall of the inverted T-shaped mixing tube 3 opposite to the fan gear 902. The end of the limit bearing 15 away from the inverted T-shaped mixing tube 3 is installed with a connecting rod 16. The end of the connecting rod 16 away from the limit bearing 15 is connected to the fan gear 902. The limit bearing 15 includes an inner ring and an outer ring. The connecting rod 16 is connected to the inner ring of the limit bearing 15. The fan gear 902 drives the connecting rod 16 to rotate, and the inner ring rotates with the connecting rod 16. The outer ring fixes the connecting rod 16 and the fan gear 902 to the inner wall of the inverted T-shaped mixing tube 3.

[0054] Similarly, when the transmission gear 901 drives the rotating shaft 6 and the stirring rod 8 to rotate, the transmission gear 901 needs to be fixed on the inner wall of the inverted T-shaped mixing tube 3. In order to fix the transmission gear 901 on the inner wall of the inverted T-shaped mixing tube 3, a fixed bearing 17 is installed on the inner wall of the inverted T-shaped mixing tube 3 opposite the transmission gear 901. A rotating rod 31 is installed at the end of the fixed bearing 17 away from the inverted T-shaped mixing tube 3. The end of the rotating rod 31 away from the fixed bearing 17 is connected to the transmission gear 901. The fixed bearing 17 rotatably fixes the transmission gear 901, the rotating shaft 6, and the stirring rod 8 to the inner wall of the inverted T-shaped mixing tube 3.

[0055] When the gas flows in the inverted T-shaped mixing tube 3, the slow wind hood 7 and the stirring rod 8 cooperate to stir the gas evenly. The stirred gas is then passed into the bellows 2 to help the fuel burn. In order to accurately detect the oxygen content in the gas in the bellows 2, the gas detection port 10 is set near the center of the bellows 2.

[0056] like Figure 3 As shown, the gas after combustion flows from the gas detection port 10 to the gas analyzer 12 for detection. In order to remove impurity particles and water vapor in the gas to be measured and ensure the accuracy of the measured value, the gas to be measured is passed through the dust removal and dehumidification box 11 and then passed into the gas analyzer 12. In order to remove impurity particles and water vapor in the gas to be measured, a movable plate 13 is installed in the dehumidification and dust removal box 11. A sticker 14 is provided on the movable plate 13. The end of the movable plate 13 is connected to a driving structure. The driving structure drives the movable plate 13 and the sticker 14 to rotate, so that the gas adheres to the impurity particles in the gas when circulating in the dust removal and dehumidification box 11. After the impurity particles and water vapor are removed in the dust removal and dehumidification box 11, the gas enters the gas analyzer 12 for detection.

[0057] In order to make the adhesive paper 14 adhere to the impurity particles in the gas in the dust removal and dehumidification box 11 as much as possible, the edge of the movable plate 13 is close to the inner wall of the dust removal and dehumidification box 11, and there is a gap between the inner wall of the dust removal and dehumidification box 11, so that the area of ​​the movable plate 13 is only slightly smaller than the cross-sectional area of ​​the dust removal and dehumidification box 11. The movable plate 13 can drive the adhesive paper 14 to rotate in the dust removal and dehumidification box 11 and can adhere to the impurity particles over the maximum area.

[0058] The gas analyzer 12 can set a threshold value of the oxygen content in the gas to be measured in advance. When the measured oxygen content exceeds the threshold value, the gas analyzer 12 will issue an alarm to remind the staff to adjust the amount of gas introduced into the bellows 2 in time.

[0059] The movable plate 13 drives the adhesive paper 14 to rotate in the dust removal and dehumidification box 11 to adhere to the impurity particles in the gas as comprehensively as possible. In order to drive the movable plate 13 to rotate, the driving structure includes a driving motor 18 installed outside the dust removal and dehumidification box 11, a driving shaft 19 connected to the output end of the driving motor 18, a large pulley 20 installed on the driving shaft 19, a transmission shaft 21 installed on the side wall of the dust removal and dehumidification box 11, a small pulley 22 installed on the transmission shaft 21, and a belt 23 sequentially sleeved on the large pulley 20 and the small pulley 22;

[0060] The transmission shaft 21 passes through the side wall of the dust removal and dehumidification box 11 and is connected to the movable plate 13;

[0061] The driving motor 18 drives the driving shaft 19 and the large pulley 20 to rotate, the large pulley 20 drives the belt 23 to rotate, the belt 23 drives the small pulley 22 and the transmission shaft 21 to rotate, and the transmission shaft 21 drives the movable plate 13 to rotate;

[0062] In order to be able to adhere to the impurity particles in the gas as much as possible, the movable plate 13 can be set to two. Specifically, two large pulleys 20 are respectively installed on the drive shaft 19, two transmission shafts 21 are respectively set on the side walls of the dust removal and dehumidification box 11, and small pulleys 22 are respectively set on the two transmission shafts 21. The two transmission shafts 21 are respectively connected to the movable plate 13, and a belt 23 is sleeved on each pair of large pulleys 20 and small pulleys 22. Therefore, when the driving motor 18 drives the drive shaft 19 to rotate, the two large pulleys 20 both rotate and transmit power to the small pulley 22 through the belt 23. The small pulley 22 drives the two transmission shafts 21 to rotate respectively, and the transmission shaft 21 drives the movable plate 13 to rotate, thereby rotating the two movable plates 13 and the adhesive paper 14.

[0063] The movable plate 13 drives the adhesive paper 14 to rotate to absorb fine impurity particles in the gas, but when the adhesive paper 14 turns to be parallel to the dust removal and dehumidification box 11, the gas flows between the adhesive paper 14 and the inner wall of the dust removal and dehumidification box 11, and the impurity particles in the flowing gas away from the adhesive paper 14 cannot be adhered to the adhesive paper 14. In order to remove the impurity particles in the gas as much as possible, a filter screen 24 is installed in the dust removal and dehumidification box 11 near the gas detection port 10 and the gas analyzer 12. When the gas to be tested enters the dust removal and dehumidification box 11 from the gas detection port 10, the large impurity particles in the gas to be tested are first filtered by the filter screen 24, and then pass through the two rotating adhesive papers 14 respectively. After the adhesive paper 14 adheres to the fine impurity particles, it is finally filtered by the filter screen 24 near the end of the gas analyzer 12 in the dust removal and dehumidification box 11. After quadruple filtration, the gas to be tested enters the gas analyzer 12 for detection.

[0064] If the movable plate 13 always maintains the same rotation angle, for example, when the front movable plate 13 is rotated to be parallel to the gas flow direction, the rear movable plate 13 is also rotated to be parallel to the gas flow direction. If the gas flow speed is too fast, the gas passes directly from the side of the rear movable plate 13 and passes through without being filtered through the surface of the movable plate 13. In this case, a double filtering effect may not be achieved. In order to further optimize the filtering effect, the two movable plates 13 can be set to different angles. For example, when one of the movable plates 13 is rotated to be parallel to the gas flow direction, the other movable plate 13 is just rotated to be perpendicular to the gas flow direction. In this way, the adhesive paper 14 on the two movable plates 13 can achieve a double filtering effect on the gas.

[0065] like Figure 1As shown, in order to be able to synchronously remove dust and dehumidify the gas to be tested, a condenser 25 is installed in the dust removal and dehumidification box 11, and a water outlet pipe 26 is installed at the bottom of the dust removal and dehumidification box 11. A water valve 27 is provided on the water outlet pipe 26. The condenser 25 liquefies the water vapor in the gas to be tested into water, and the water is stored at the bottom of the dust removal and dehumidification box 11. When the water is stored to a certain height, the water valve 27 is opened and the water is discharged from the water outlet pipe 26.

[0066] Since the temperature around the bellows 2 is relatively high, the gas to be tested needs to be introduced into a location far away from the bellows 2 for dust removal and dehumidification. In order to introduce the gas to be tested into a distant location, an air inlet 28 is provided at the end of the dust removal and dehumidification box 11 near the air inspection port 10. A ventilation pipe 29 is connected between the air inspection port 10 and the air inlet 28. An electromagnetic valve 30 is installed on the ventilation pipe 29. When it is necessary to detect the oxygen content in the bellows 2, the electromagnetic valve 30 is opened, and the gas to be tested enters the dust removal and dehumidification box 11 through the ventilation pipe 29. When it is not necessary to detect the oxygen content in the gas, the electromagnetic valve 30 is closed, and the gas cannot enter the dust removal and dehumidification box 11.

[0067] The above embodiments are merely exemplary embodiments of the present application and are not intended to limit the scope of the present application. The scope of protection of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and scope of protection of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present application.

Claims

1. A boiling furnace oxygen content detection device, characterized in that: The invention comprises a fluidized bed furnace (1), wherein a bellows (2) is installed at the bottom of the fluidized bed furnace (1), an inverted T-shaped mixing pipe (3) is connected to the bellows (2), an air inlet (4) is provided at the end of the inverted T-shaped mixing pipe (3) away from the bellows (2), and the air inlet (4) is connected to a blast structure; The inverted T-shaped mixing tube (3) is narrow at the top and wide at the bottom, and is formed by coaxially connecting two cylindrical tubes of different diameters, and the facing direction of the air inlet (4) is away from the opening direction of the cylindrical tube located above; A rotating shaft (6) is provided at the central axis position of the inverted T-shaped mixing tube (3); a plurality of slow wind covers (7) are provided at equal intervals on the inner wall of the inverted T-shaped mixing tube (3) along its own length direction; the rotating shaft (6) passes through the slow wind covers (7) in sequence; and a stirring rod (8) is installed on the rotating shaft (6) at a position between adjacent slow wind covers (7); A transmission structure (9) is installed at the end of the rotating shaft (6) close to the air inlet (4), and the blowing structure blows gas into the inverted T-shaped mixing tube (3). The gas flows in the inverted T-shaped mixing tube (3) and drives the transmission structure (9) to operate through the gas pressure. The transmission structure (9) drives the rotating shaft (6) and the stirring rod (8) to rotate, so as to stir the gas evenly when the gas passes through the slow wind cover (7); The wind box (2) is provided with a gas detection port (10), the gas detection port (10) is connected to a dehumidification and dust removal box (11), and a gas analyzer (12) is installed at the end of the dehumidification and dust removal box (11) away from the gas detection port (10).

2. A boiling furnace oxygen content detection device according to claim 1, characterized in that: The slow wind cover (7) is a hollow conical structure, and the inner diameter of the slow wind cover (7) gradually decreases along the gas flow direction; The wind slowing cover (7) is provided with a plurality of ventilation holes, and a ventilation gap is formed between the end of the wind slowing cover (7) and the rotating shaft (6).

3. A boiling furnace oxygen content detection device according to claim 1, characterized in that: The transmission structure (9) comprises a transmission gear (901) mounted on the end of the rotating shaft (6) close to the air inlet (4), and a fan gear (902) mounted in the inverted T-shaped mixing tube (3) and facing the air inlet (4); The fan gear (902) is away from the opening direction of the cylindrical tube located above, and the fan gear (902) is meshed with the transmission gear (901); When the blower (5) introduces gas into the air inlet (4), the gas drives the fan gear (902) to rotate, the fan gear (902) drives the transmission gear (901) to rotate, and the transmission gear (901) drives the rotating shaft (6) and the stirring rod (8) to rotate.

4. A boiling furnace oxygen content detection device according to claim 1, characterized in that: The air blowing structure comprises a blower (5), and the air outlet pipe of the blower (5) is connected to the air inlet (4).

5. The device for detecting oxygen content in a fluidized bed furnace according to claim 3, characterized in that: A limit bearing (15) is installed on the inner wall of the inverted T-shaped mixing tube (3) facing the fan gear (902); a connecting rod (16) is installed on the end of the limit bearing (15) away from the inverted T-shaped mixing tube (3); and the end of the connecting rod (16) away from the limit bearing (15) is connected to the fan gear (902); A fixed bearing (17) is installed on the inner wall of the inverted T-shaped mixing tube (3) facing the transmission gear (901), a rotating rod (31) is installed at the end of the fixed bearing (17) away from the inverted T-shaped mixing tube (3), and the end of the rotating rod (31) away from the fixed bearing (17) is connected to the transmission gear (901).

6. The device for detecting oxygen content in a fluidized bed furnace according to claim 1, characterized in that: The air detection port (10) is arranged at a position close to the center of the wind box (2).

7. The device for detecting oxygen content in a fluidized bed furnace according to claim 1, characterized in that: A movable plate (13) is installed in the dehumidification and dust removal box (11), and a sticky paper (14) is provided on the movable plate (13). The end of the movable plate (13) is connected to a driving structure, and the driving structure drives the movable plate (13) and the sticky paper (14) to rotate, so that the gas adheres to the impurity particles in the gas when it circulates in the dust removal and dehumidification box (11). After the impurity particles and water vapor are removed in the dust removal and dehumidification box (11), the gas enters the gas analyzer (12) for detection; The driving structure comprises a driving motor (18) installed outside the dust removal and dehumidification box (11), a driving shaft (19) connected to the output end of the driving motor (18), a large pulley (20) installed on the driving shaft (19), a transmission shaft (21) installed on the side wall of the dust removal and dehumidification box (11), a small pulley (22) installed on the transmission shaft (21), and a belt (23) sequentially sleeved on the large pulley (20) and the small pulley (22); The transmission shaft (21) passes through the side wall of the dust removal and dehumidification box (11) and is connected to the movable plate (13); The driving motor (18) drives the driving shaft (19) and the large pulley (20) to rotate, the large pulley (20) drives the belt (23) to rotate, the belt (23) drives the small pulley (22) and the transmission shaft (21) to rotate, and the transmission shaft (21) drives the movable plate (13) to rotate.

8. The device for detecting oxygen content in a fluidized bed furnace according to claim 1, characterized in that: Filters (24) are installed in the dust removal and dehumidification box (11) at the ends close to the gas detection port (10) and the gas analyzer (12).

9. The device for detecting oxygen content in a fluidized bed furnace according to claim 1, characterized in that: A condenser (25) is installed in the dust removal and dehumidification box (11); A water outlet pipe (26) is installed at the bottom of the dust removal and dehumidification box (11), and a water valve (27) is provided on the water outlet pipe (26).

10. The device for detecting oxygen content in a fluidized bed furnace according to claim 1, characterized in that: The dust removal and dehumidification box (11) is provided with an air inlet (28) at the end close to the air inspection port (10), and a vent pipe (29) is connected between the air inspection port (10) and the air inlet (28), and a solenoid valve (30) is installed on the vent pipe (29).

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