Device for denitrating spheroidal catalyst in fluid bed

Abstract

The utility model discloses a fluidized bed denitration device for a spheroidal catalyst, which belongs to the technical field of denitration treatment and comprises an ammonia gas generating device and a fluidized bed denitration barrel, and the top end of the fluidized bed denitration barrel is communicated with a feeding pipe for feeding the spheroidal catalyst. The bottom end of the fluidized bed denitration barrel is communicated with a discharge pipe for discharging the failed spherical catalyst; a heat insulation frame is mounted at the top end of the fluidized bed denitration barrel, two electric push rods are mounted at the top end of the heat insulation frame, moving parts of the two electric push rods are jointly connected with an assembly plate, a servo motor is mounted at the top end of the assembly plate, and an output shaft of the servo motor is connected with a rotating rod penetrating through the assembly plate and the fluidized bed denitration barrel; the periphery of the rotating rod is connected with a plurality of treatment frames, and the inner wall of each treatment frame is connected with a pushing net for ventilating and stirring the spherical catalyst. The spherical catalyst is arranged in a fluidized bed denitration device, so that the stirring is comprehensive, dead angles are avoided, and the flowing of gas is not blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of denitration treatment, in particular to a spherical catalyst in a fluidized bed denitration device. Background Technique

[0002] Nitrogen oxides are one of the main causes of environmental problems such as ozone holes and photochemical smog. Industrial furnaces are the main equipment for discharging nitrogen oxides. At present, there is a large gap between the emission level of nitrogen oxides in industrial furnaces using technologies such as non-catalytic denitration and the ultra-low emission standard. Therefore, denitration is carried out. Traditional denitration devices will design a flow component to assist the catalyst to move, but there will be dead corners in the movement, resulting in some catalysts not being utilized.

[0003] After retrieval, a Chinese patent document (application publication number CN118122126A) is a rolling bed low-temperature catalytic reduction denitration system. The rolling bed low-temperature catalytic reduction denitration system of the present invention includes an ammonia generation device and a rolling bed low-temperature catalytic denitration device. The rolling bed low-temperature catalytic denitration device has a flue gas inlet and a flue gas outlet. The rolling bed low-temperature catalytic denitration device is filled with spherical low-temperature denitration catalysts. A catalyst flow component is provided in the rolling bed low-temperature catalytic denitration device. The ammonia outlet of the ammonia generation device is connected to the flue gas inlet through an ammonia delivery pipe. The flue gas inlet is also connected to a flue gas pipeline, and the flue gas outlet is connected to an exhaust pipe. Advantages: The system is reasonably designed and can effectively solve the denitration problem of flue gas at 130°C to 200°C. Combining an independent ammonia production system and spherical low-temperature catalysts, it can replace medium- and high-temperature SCR and achieve ultra-low NOx emission standards. The denitration device will design a flow component to assist the catalyst to move, but there will be dead corners in the movement, resulting in some catalysts not being utilized. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spherical catalyst in a fluidized bed denitration device to solve the problems raised in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spherical catalyst in a fluidized bed denitration device includes an ammonia generation device and a fluidized bed denitration barrel. The top of the fluidized bed denitration barrel is connected to a feed pipe for feeding spherical catalysts, and the bottom of the fluidized bed denitration barrel is connected to a discharge pipe for discharging the ineffective spherical catalysts.

[0006] An insulating frame is installed at the top of the fluidized bed denitration barrel. Two electric push rods are installed at the top of the insulating frame. The moving parts of the two electric push rods are jointly connected with an assembly plate. A servo motor is installed at the top of the assembly plate. The output shaft of the servo motor is connected with a rotating rod that penetrates the assembly plate and the fluidized bed denitration barrel. A plurality of treatment frames are connected to the outer circumference of the rotating rod. A pushing net for ventilating and stirring the spherical catalyst is connected to the inner wall of the treatment frame. A filter screen is embedded and installed at the bottom of the fluidized bed denitration barrel. An air vent corresponding to the position of the filter screen is embedded and installed at the bottom of the fluidized bed denitration barrel. The air vent is communicated with an external air intake device through an arc-shaped connecting pipe.

[0007] As a preferred implementation, an L-shaped elastic scraper with heat-resistant function is adhesively bonded to the outer circumference of the lower treatment frame, and a sealing cover is threadedly connected to the outer circumference of the feed pipe.

[0008] As a preferred implementation, a smoke exhaust pipe is communicated with the top of the fluidized bed denitration barrel, and a perspective window is embedded and installed on the outer circumference of the fluidized bed denitration barrel.

[0009] As a preferred implementation, an air pipe is communicated between the ammonia generation device and the connecting pipe, and a flow regulating valve and a pressurized conveying device are installed on the outer circumference of the air pipe.

[0010] As a preferred implementation, a counterweight plate is installed at the bottom of the ammonia generation device, and a plurality of connecting rods are connected between the counterweight plate and the fluidized bed denitration barrel.

[0011] Compared with the prior art, the technical effects and advantages of the present utility model:

[0012] In the fluidized bed denitration device with the spherical catalyst, when in use, the servo motor drives the rotating rod to rotate, thereby driving the treatment frame, the pushing net and the elastic scraper to rotate, avoiding the appearance of dead corners, and the telescopic movement of the electric push rod changes the height of the servo motor and the treatment frame, changes the stirring state, changes the position and state of the spherical catalyst, improves the utilization rate of the spherical catalyst, and the lower spherical catalyst will be preferentially used. Therefore, when feeding, the lower spherical catalyst is preferentially discharged, avoiding the preferential discharging of some spherical catalysts with low utilization rate;

[0013] In the fluidized bed denitration device with the spherical catalyst, the treatment frame is vertically arranged, and the air passage is also in a vertical state. Compared with the traditional rotation mode, it will not block the flow of gas;

[0014] In the fluidized bed denitration device with the spherical catalyst, not only the stirring is comprehensive, there are no dead corners, but also the flow of gas is not blocked. Description of the Drawings

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 is a structural schematic diagram of the present invention;

[0017] Figure 2 is a cross-sectional view of the fluidized bed denitration barrel of the present invention;

[0018] Figure 3 is a structural schematic diagram of the servo motor of the present invention.

[0019] Explanation of reference numerals:

[0020] In the figure:

[0021] 1. Ammonia generation device; 2. Fluidized bed denitration barrel; 3. Feed pipe; 4. Discharge pipe; 5. Heat insulation frame; 6. Electric push rod; 7. Assembly plate; 8. Servo motor; 9. Rotating rod; 10. Processing frame; 11. Push net; 12. Filter net; 13. Ventilation hopper; 14. Connecting pipe; 15. Elastic scraper; 16. Sealing cover; 17. Smoke exhaust pipe; 18. Vent pipe; 19. Flow regulating valve; 20. Boosting and conveying device; 21. Counterweight plate; 22. Connecting rod. Specific embodiments

[0022] In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some well-known technical features in the art are not described.

[0023] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this article are based on the up, down, left, right, front, back, inside and outside directions in the figures shown in the present invention, and are hereby explained together.

[0024] The connection method can adopt existing methods such as bonding, welding, bolt connection, etc., according to actual needs.

[0025] During the flow process, the spherical catalysts rub against each other on the surface, grinding off the deactivated catalysts on the surface of the spherical catalysts. The spherical catalysts in the denitration device become brand-new catalysts again. When a certain amount of the catalysts ground off from the spherical catalysts is reached, brand-new spherical catalysts can be directly supplemented through the catalyst feeding port of the denitration device, fully realizing the on-line replacement of catalysts in the denitration device and achieving the long-term, safe, stable and economic operation of the denitration device.

[0026] Please refer to Figures 1 to 3 As shown, there is a spherical catalyst in a fluidized bed denitration device. This embodiment includes an ammonia generation device 1 and a fluidized bed denitration barrel 2. The top end of the fluidized bed denitration barrel 2 is connected to a feed pipe 3 for feeding spherical catalysts. The outer periphery of the feed pipe 3 is threadedly connected with a sealing cover 16. The bottom end of the fluidized bed denitration barrel 2 is connected to a discharge pipe 4 for discharging the deactivated spherical catalysts. The top end of the fluidized bed denitration barrel 2 is connected to a smoke exhaust pipe 17. A viewing window is embedded in the outer periphery of the fluidized bed denitration barrel 2. The spherical catalysts are introduced into the fluidized bed denitration barrel 1 through the feed pipe 3, and then the sealing cover 16 is covered. The connecting pipe 14 is connected to the intake device, and the smoke exhaust pipe 17 is connected to the outlet device;

[0027] When refueling is required, open the solenoid valve of the discharge pipe 4 to discharge the materials, and add new spherical catalysts from the top through the feed pipe 3, which can realize the on-line replacement of catalysts in the denitration device and ensure the long-term safe and stable operation of the catalytic reduction denitration system. The spherical catalysts in the lower layer will be preferentially used. Therefore, when discharging materials, the spherical catalysts in the lower layer are preferentially discharged to avoid some spherical catalysts with low utilization rate being preferentially discharged.

[0028] At the top of the fluidized bed denitration barrel 2, there is an insulation frame 5 installed. At the top of the insulation frame 5, there are two electric push rods 6 installed. The moving parts of the two electric push rods 6 are jointly connected to an assembly plate 7. At the top of the assembly plate 7, there is a servo motor 8 installed. The output shaft of the servo motor 8 is connected to a rotating rod 9 that penetrates through the assembly plate 7 and the fluidized bed denitration barrel 2. The outer circumference of the rotating rod 9 is connected with a plurality of treatment frames 10. The treatment frames 10 are arranged vertically, and the air ducts are also in a vertical state. Compared with the traditional rotation method, it will not block the flow of gas. The inner wall of the treatment frame 10 is connected with a push net 11 for ventilating and agitating the spherical catalyst. At the bottom of the fluidized bed denitration barrel 2, there is a filter net 12 embedded and installed. At the bottom of the fluidized bed denitration barrel 2, there is an air vent 13 embedded and installed corresponding to the position of the filter net 12. The air vent 13 is connected to an external air intake device through an arc-shaped connecting pipe 14. An L-shaped elastic scraper 15 with heat-resistant function is adhesively attached to the outer circumference of the lower treatment frame 10. The air intake device introduces gas into the air vent 13 through the connecting pipe 14, and after being treated by the spherical catalyst in the fluidized bed denitration barrel 2, it flows out through the exhaust pipe 17. During this process, ammonia enters the connecting pipe 14 through the air pipe 18, for mixing and flowing. The servo motor 8 drives the rotating rod 9 to rotate, and then drives the treatment frame 10, the push net 11 and the elastic scraper 15 to rotate, avoiding the appearance of dead corners. Moreover, the telescoping of the electric push rod 6 changes the height of the servo motor 8 and the treatment frame 10, changes the stirring state, changes the position and state of the spherical catalyst, and improves the utilization rate of the spherical catalyst. The lower spherical catalyst will be preferentially used. Therefore, when discharging materials, the lower spherical catalyst is preferentially discharged, avoiding the preferential discharging of some spherical catalysts with low utilization rate.

[0029] There is an air pipe 18 connected between the ammonia generating device 1 and the connecting pipe 14. A flow regulating valve 19 and a pressurized conveying device 20 are installed on the outer circumference of the air pipe 18. At the bottom of the ammonia generating device 1, there is a counterweight plate 21 installed. A plurality of connecting rods 22 are connected between the counterweight plate 21 and the fluidized bed denitration barrel 2.

[0030] The ammonia generating device 1, the electric push rod 6, the servo motor 8, the flow regulating valve 19, the pressurized conveying device 20 and the solenoid valve are all conventional instruments. Their working principles, sizes and models have nothing to do with the problems solved by this application, so no more description will be made. The control method of the present invention is controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of power also belongs to the common knowledge in the art. And the present invention is mainly used to protect mechanical devices, so the control method and circuit connection of the present invention will not be further explained in detail.

[0031] Working principle

[0032] The spherical catalyst is used in a fluidized bed denitration device. The spherical catalyst is introduced into the fluidized bed denitration barrel 1 through the feed pipe 3, and then the sealing cover 16 is covered. The connecting pipe 14 is connected to the air inlet device, and the exhaust pipe 17 is connected to the air outlet device.

[0033] The servo motor 8 and the ammonia generating device 1 are started. The air inlet device introduces gas into the ventilation hopper 13 through the connecting pipe 14. After being treated by the spherical catalyst in the fluidized bed denitration barrel 2, it flows out through the exhaust pipe 17. During this process, ammonia enters the connecting pipe 14 through the ventilation pipe 18 for mixing and flowing. The servo motor 8 drives the rotating rod 9 to rotate, and then drives the treatment frame 10, the pushing net 11 and the elastic scraper 15 to rotate, avoiding the appearance of dead corners. Moreover, the telescopic movement of the electric push rod 6 changes the height of the servo motor 8 and the treatment frame 10, changes the stirring state, changes the position and state of the spherical catalyst, and improves the utilization rate of the spherical catalyst.

[0034] It should be noted that in this article, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation. An element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0035] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spherical catalyst in a fluidized bed denitration device, comprising an ammonia generation device (1) and a fluidized bed denitration barrel (2), characterized in that: The top end of the fluidized bed denitration barrel (2) is communicated with a feed pipe (3) for feeding spherical catalyst, and the bottom end of the fluidized bed denitration barrel (2) is communicated with a discharge pipe (4) for discharging the ineffective spherical catalyst. An insulating frame (5) is installed at the top end of the fluidized bed denitration barrel (2). Two electric push rods (6) are installed at the top end of the insulating frame (5). The moving parts of the two electric push rods (6) are jointly connected with an assembly plate (7). A servo motor (8) is installed at the top end of the assembly plate (7). The output shaft of the servo motor (8) is connected with a rotating rod (9) that penetrates through the assembly plate (7) and the fluidized bed denitration barrel (2). A plurality of treatment frames (10) are connected to the outer periphery of the rotating rod (9). A push net (11) for ventilating and agitating the spherical catalyst is connected to the inner wall of the treatment frame (10). A filter screen (12) is embedded and installed at the bottom end of the fluidized bed denitration barrel (2). An air vent (13) corresponding to the position of the filter screen (12) is embedded and installed at the bottom end of the fluidized bed denitration barrel (2). The air vent (13) is communicated with an external air intake device through an arc-shaped connecting pipe (14).

2. The spherical catalyst according to claim 1 in a fluidized bed denitration device, characterized in that, An L-shaped elastic scraper (15) with heat-resistant function is adhered to the outer periphery of the lower treatment frame (10). A sealing cover (16) is threadedly connected to the outer periphery of the feed pipe (3).

3. A spherical catalyst in a fluidized bed denitrification device according to claim 1, characterized in that, A smoke exhaust pipe (17) is communicated with the top end of the fluidized bed denitration barrel (2). A perspective window is embedded and installed on the outer periphery of the fluidized bed denitration barrel (2).

4. A spherical catalyst according to claim 1, in a fluidized bed denitration device, characterized in that, A ventilation pipe (18) is communicated between the ammonia generating device (1) and the connecting pipe (14). A flow regulating valve (19) and a booster conveying device (20) are installed on the outer periphery of the ventilation pipe (18).

5. A spherical catalyst in a fluidized bed denitration device according to claim 1, characterized in that A counterweight plate (21) is installed at the bottom end of the ammonia generating device (1). A plurality of connecting rods (22) are connected between the counterweight plate (21) and the fluidized bed denitration barrel (2).

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