Fluidized bed test device of powder for eliminating ammonia escape from flue gas of waste incineration power plant

Abstract

The utility model discloses a powder fluidized bed test device for eliminating ammonia escape from flue gas of a waste incineration power plant, which comprises a reaction tank and an exhaust pipeline connected to the top of the reaction tank, the bottom end of the side surface of the reaction tank is connected with a gas inlet pipeline, the top of the gas inlet pipeline is connected with an injection pump, and the output end of the injection pump is connected with a spray head. An air inlet pipeline is arranged in the reaction tank, a nozzle is arranged in the air inlet pipeline, a disturbance mechanism for disturbing air flow is connected in the air inlet pipeline, the disturbance mechanism comprises a motor, a fan frame and fan blades, the fan frame is fixed in the air inlet pipeline, the fan blades are rotatably connected to the fan frame, and a spraying mechanism for spraying a catalyst is connected in the reaction tank. Air flow can be generated in the rotating process of the fan blades, turbulent flow can be formed in the air inlet pipeline by the air flow, ammonia gas is cut and diffused at the outlet of the spray head by the turbulent flow, and a good diffusion angle and turbulent flow are formed, so that uniform mixing of flue gas and the ammonia gas is promoted, and the denitration reaction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration technology, specifically to a fluidized bed experimental device for eliminating ammonia escape from flue gas in waste incineration power plants. Background Technology

[0002] Waste incineration is a process in which waste is reduced in volume through appropriate thermal decomposition, combustion, and melting reactions at high temperatures, becoming residue or molten solid matter. Waste incineration facilities must be equipped with flue gas treatment systems to prevent the re-release of heavy metals, organic pollutants, and other contaminants into the environment. Combustion produces large amounts of NOx, which can form photochemical smog, acid rain, damage the ozone layer, and even contribute to a severe greenhouse effect, posing significant harm to human health, the environment, and ecosystems. Therefore, NOx control and the improvement of denitrification technologies are of great importance to protecting the ecological environment and promoting my country's sustainable development.

[0003] Currently, traditional denitrification mainly employs selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). Among them, the widely used SCR technology is an effective method for treating NOx emissions from exhaust gas. Its reducing agents include urea, ammonia water, and pure ammonia. Typically, NH3 is used as a reducing agent to reduce NOx to harmless N2 under the action of a catalyst, thereby removing NOx from the flue gas.

[0004] When treating NOx, a fluidized bed test device can be used for experimental operation, and the test data is beneficial for practical application. During the experiment, an injection pump is usually used to inject ammonia water into the inlet pipe, so that the ammonia gas can come into contact with the flue gas and react. However, insufficient mixing of ammonia gas and flue gas may occur, which will affect the subsequent reduction reaction. Utility Model Content

[0005] The purpose of this invention is to provide a fluidized bed test device for eliminating ammonia escape in flue gas of waste incineration power plants, which has the advantages of promoting uniform mixing of flue gas and ammonia and improving denitrification reaction efficiency, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fluidized bed test device for eliminating ammonia escape in flue gas from a waste incineration power plant, comprising a reaction tank and an exhaust pipe connected to the top of the reaction tank, an air inlet pipe connected to the bottom side of the reaction tank, an injection pump connected to the top of the air inlet pipe, a nozzle connected to the output end of the injection pump, the nozzle being located inside the air inlet pipe, a disturbance mechanism for agitating airflow connected inside the air inlet pipe, the disturbance mechanism comprising a motor, a fan frame, and fan blades, the fan frame being fixed inside the air inlet pipe, the fan blades being rotatably connected to the fan frame, the motor being used to drive the fan blades to rotate, and a spraying mechanism for spraying catalyst connected inside the reaction tank.

[0007] Preferably, the disturbance mechanism further comprises a rotating shaft, a fan shaft, a first bevel gear, a transmission shaft and a second bevel gear, the power output end of the motor is connected with the rotating shaft, the end of the rotating shaft is connected with the first bevel gear, the first bevel gear is matched with the second bevel gear, the second bevel gear is connected with one end of the transmission shaft, the other end of the transmission shaft is connected with the fan shaft, and the fan shaft is connected with the fan blade.

[0008] Preferably, the first bevel gear is connected with the second bevel gear in meshing mode.

[0009] Preferably, the transmission shaft is rotatably connected with the fan frame.

[0010] Preferably, the spraying mechanism comprises a powder spraying device, a powder conveying pipe, a powder spraying disc and a plurality of spraying ports, the powder spraying device is connected with the top of the reaction tank, the output end of the powder spraying device is connected with the powder conveying pipe, the end of the powder conveying pipe is connected with the powder spraying disc, and the plurality of spraying ports are arranged on the powder spraying disc.

[0011] Preferably, the axis of the powder conveying pipe coincides with the center line of the reaction tank, and the powder conveying pipe is fixedly connected with the reaction tank.

[0012] Preferably, the output end of the injection pump is connected with an injection pipe, and the end of the injection pipe is connected with the nozzle.

[0013] Preferably, the fan frame is fixedly connected with a box body, the first bevel gear and the second bevel gear are located in the box body, and the rotating shaft and the transmission shaft are rotatably connected with the box body.

[0014] Compared with the prior art, the utility model discloses the following beneficial effects: the utility model discloses the disturbance mechanism is set up, the injection pump sprays ammonia water from the nozzle to the air inlet pipeline, the motor drives the rotating shaft to rotate, and simultaneously drives the first bevel gear to rotate, and the first bevel gear cooperates with the second bevel gear, realizes the rotation of the transmission shaft, the fan shaft and the fan blade, the airflow is formed in the rotation process of the fan blade, the airflow forms the turbulence in the air inlet pipeline, the turbulence makes ammonia gas cut and spread at the nozzle outlet, forms good diffusion angle and turbulence, thereby promoting the uniform mixing of flue gas and ammonia gas, improves the denitration reaction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the perspective drawing of the utility model;

[0016] Figure 2 It is the internal structure schematic view of the reaction tank of the utility model;

[0017] Figure 3 It is the air inlet pipeline and the reaction tank connection structure schematic view of the utility model;

[0018] Figure 4The utility model discloses an air inlet pipeline internal structure schematic view.

[0019] Figure 5 The utility model discloses a disturbance mechanism structure schematic view.

[0020] In the drawing: 1, reaction tank;2, powder injection equipment;3, exhaust pipeline;4, injection pump;5, injection pipe;6, motor;7, air inlet pipeline;8, powder delivery pipe;9, powder spraying disc;10, injection port;11, discharge port;12, box;13, rotating shaft;14, fan blade;15, fan shaft;16, fan frame;18, spray head;19, conical tooth one;20, transmission shaft;21, conical tooth two. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0022] Please refer to Figures 1 to 5 The utility model provides a kind of for garbage incineration power plant flue gas eliminates ammonia escape powder fluidized bed test device, including reaction tank 1 and the exhaust pipeline 3 connected in reaction tank 1 top, the side bottom end of reaction tank 1 is connected with air inlet pipeline 7, the front end of air inlet pipeline 7 is connected with electric heater, can be heated to flue gas, in turn drive air inlet pipeline 7 internal temperature rise, accelerate ammonia water decomposition. The top of air inlet pipeline 7 is connected with injection pump 4, the output end of injection pump 4 is connected with spray head 18, spray head 18 is located in air inlet pipeline 7, injection pump is a stepper motor and its driver, screw rod and bracket etc. are constituted, when working, single-chip microcomputer system sends control pulse and makes stepper motor rotate, and stepper motor drives screw rod to change rotary motion into straight line motion, and the piston of injector is pushed to injection infusion, realizes high accuracy, stable and pulseless liquid transmission. Air inlet pipeline 7 is connected with the disturbance mechanism for disturbing airflow, and the disturbance mechanism includes motor 6, fan frame 16, fan blade 14, fan frame 16 is fixed in air inlet pipeline 7, fan blade 14 is rotatably connected to fan frame 16, and motor 6 is used to drive fan blade 14 to rotate, and reaction tank 1 is connected with the spraying mechanism for spraying catalyst.

[0023] The injection pump 4 injects ammonia water into the injection pipe 5 and sprays it out of the nozzle 18 to form ammonia gas. At the same time, the motor 6 drives the rotating shaft 13 to rotate, which synchronously drives the conical tooth one 19 to rotate, the conical tooth two 21 to rotate, and the transmission shaft 20, the fan shaft 15, and the fan blade 14 to rotate. The rotation of the fan blade 14 generates airflow, which forms a turbulent flow in the air inlet pipe 7. The turbulent flow cuts and diffuses the ammonia gas at the outlet of the nozzle 18, forming a good diffusion angle and turbulent flow, thereby promoting the uniform mixing of flue gas and ammonia gas and improving the efficiency of the denitration reaction.

[0024] The disturbance mechanism further includes the rotating shaft 13, the fan shaft 15, the conical tooth one 19, the transmission shaft 20, and the conical tooth two 21. The power output end of the motor 6 is connected to the rotating shaft 13. The end of the rotating shaft 13 is connected to the conical tooth one 19. The conical tooth one 19 is matched with the conical tooth two 21. The conical tooth two 21 is connected to one end of the transmission shaft 20. The other end of the transmission shaft 20 is connected to the fan shaft 15. The fan shaft 15 is connected to the fan blade 14. In use, the motor 6 drives the rotating shaft 13 to rotate, which realizes the rotation of the conical tooth one 19. The conical tooth one 19 cooperates with the conical tooth two 21, thereby realizing the rotation of the transmission shaft 20, the fan shaft 15, and the fan blade 14. This forms a good diffusion angle and turbulent flow, thereby promoting the uniform mixing of flue gas and ammonia gas and facilitating simple and convenient operation.

[0025] The conical tooth one 19 is meshed and connected with the conical tooth two 21, which has high transmission effect and can ensure that the instantaneous transmission ratio is constant.

[0026] The transmission shaft 20 is rotatably connected to the fan frame 16, which makes the transmission shaft 20 rotate stably, i.e., the fan shaft 15 and the fan blade 14 rotate stably, thereby reducing the generation of shaking. At the same time, the stability of the rotation of the conical tooth two 21 is ensured, which avoids misalignment with the conical tooth one 19 and affects the transmission effect.

[0027] The spraying mechanism includes the powder spraying device 2, the powder conveying pipe 8, the powder spraying disc 9, and multiple spraying ports 10. The powder spraying device 2 is connected to the top of the reaction tank 1. The output end of the powder spraying device 2 is connected to the powder conveying pipe 8. The end of the powder conveying pipe 8 is connected to the powder spraying disc 9. The multiple spraying ports 10 are arranged on the powder spraying disc 9. The powder spraying device 2 delivers the powder to the powder spraying disc 9 through the powder conveying pipe 8. The powder is a catalyst. The catalyst is sprayed out of the multiple spraying ports 10. Under the action of the catalyst, the NOx in the flue gas is decomposed into N2 and H2O.

[0028] The axis of the powder conveying pipe 8 coincides with the center line of the reaction tank 1. The powder conveying pipe 8 is fixedly connected to the reaction tank 1.

[0029] The output end of the injection pump 4 is connected to the injection pipe 5. The end of the injection pipe 5 is connected to the nozzle 18.

[0030] The fan frame 16 is fixed with the box body 12, the conical tooth one 19 and the conical tooth two 21 are located in the box body 12, the rotating shaft 13 and the transmission shaft 20 are rotatably connected to the box body 12, the box body 12 protects the conical tooth one 19 and the conical tooth two 21, avoids the interference of particles in the flue gas on the conical tooth one 19 and the conical tooth two 21, and ensures the transmission effect. At the same time, the box body 12 can improve the stability of the rotating shaft 13 and the transmission shaft 20.

[0031] Working principle: the gas inlet pipeline 7 delivers the flue gas into the reaction tank 1, in the delivery process, the injection pump 4 injects the ammonia water into the injection pipe 5 and sprays it from the spray head 18 to form the ammonia gas. At the same time, the motor 6 drives the rotating shaft 13 to rotate, drives the conical tooth one 19 to rotate, the conical tooth one 19 cooperates with the conical tooth two 21 to realize the rotation of the transmission shaft 20, the fan shaft 15 and the fan blade 14, the fan blade 14 rotates to generate the airflow, the airflow forms the turbulent flow in the gas inlet pipeline 7, the turbulent flow cuts and diffuses the ammonia gas at the outlet of the spray head 18 to form the good diffusion angle and the turbulent flow, so as to promote the uniform mixing of the flue gas and the ammonia gas. Then the gas is delivered into the reaction tank 1, the catalyst is delivered into the powder spraying disc 9 through the powder delivery pipe 8 by the powder spraying equipment 2, and finally sprayed from the plurality of spraying ports 10, under the action of the catalyst, the NOx in the flue gas is reduced into N2 and H2O, the purified gas is discharged from the gas outlet pipeline 3, and the water and the residue are discharged from the discharge port 11.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed test device for ammonia escape elimination of waste incineration power plant flue gas powder fluidized bed, comprising a reaction tank (1) and an exhaust pipe (3) connected to the top of the reaction tank (1), the side bottom end of the reaction tank (1) is connected with an air inlet pipe (7), characterized in that, The top of the air inlet pipe (7) is connected with an injection pump (4), the output end of the injection pump (4) is connected with a spray head (18), the spray head (18) is located in the air inlet pipe (7), a disturbance mechanism for disturbing airflow is connected in the air inlet pipe (7), the disturbance mechanism comprises a motor (6), a fan frame (16) and a fan blade (14), the fan frame (16) is fixed in the air inlet pipe (7), the fan blade (14) is rotatably connected to the fan frame (16), and the motor (6) is used for driving the fan blade (14) to rotate, and a spraying mechanism for spraying catalyst is connected in the reaction tank (1).

2. The test device for fluidized bed test of ammonia slip elimination powder for flue gas of waste incineration power plant according to claim 1, characterized in that, The disturbance mechanism further comprises a rotating shaft (13), a fan shaft (15), a conical tooth one (19), a transmission shaft (20) and a conical tooth two (21), the power output end of the motor (6) is connected with the rotating shaft (13), the end of the rotating shaft (13) is connected with the conical tooth one (19), the conical tooth one (19) is matched with the conical tooth two (21), the conical tooth two (21) is connected to one end of the transmission shaft (20), the other end of the transmission shaft (20) is connected with the fan shaft (15), and the fan shaft (15) is connected with the fan blade (14).

3. The test device for fluidized bed test of ammonia slip removal powder from flue gas of waste incineration power plant according to claim 2, characterized in that, The conical tooth one (19) is connected with the conical tooth two (21) in meshing.

4. The test device for fluidized bed test of ammonia slip elimination powder for flue gas of waste incineration power plant according to claim 2, characterized in that, The transmission shaft (20) is rotatably connected with the fan frame (16).

5. The test device for fluidized bed test of ammonia slip removal powder from flue gas of waste incineration power plant according to claim 1, characterized in that, The spraying mechanism comprises a powder spraying device (2), a powder conveying pipe (8), a powder spraying disc (9) and a plurality of spraying ports (10), the powder spraying device (2) is connected to the top of the reaction tank (1), the output end of the powder spraying device (2) is connected with the powder conveying pipe (8), the end of the powder conveying pipe (8) is connected with the powder spraying disc (9), and the plurality of spraying ports (10) are arranged on the powder spraying disc (9).

6. The test device for fluidized bed test of ammonia slip removal powder from flue gas of waste incineration power plant according to claim 5, characterized in that, The axis of the powder conveying pipe (8) coincides with the center line of the reaction tank (1), and the powder conveying pipe (8) is fixedly connected with the reaction tank (1).

7. The test device for fluidized bed test of ammonia slip removal powder from flue gas of waste incineration power plant according to claim 1, characterized in that, The output end of the injection pump (4) is connected with an injection pipe (5), and the end of the injection pipe (5) is connected with the spray head (18).

8. The test device for fluidized bed test of ammonia slip removal powder from flue gas of waste incineration power plant according to claim 3, characterized in that, The fan frame (16) is fixed with a box body (12), the conical tooth one (19) and the conical tooth two (21) are located in the box body (12), and the rotating shaft (13) and the transmission shaft (20) are rotatably connected with the box body (12).

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