Industrial flue gas denitration device based on pneumatic conveying

Abstract

The invention belongs to the technical field of flue gas purification devices, and particularly relates to an industrial flue gas denitration device based on pneumatic conveying. The crankshaft is rotationally arranged on the base; the plurality of denitration agent particle output assemblies are in transmission connection with the crankshaft, and the denitration agent particle output assemblies are fixedly arranged; the denitration agent particle storage bin is arranged at the tops of the denitration agent particle output assemblies; the discharging end of the denitration agent particle storage bin is communicated with the feeding end of the denitration agent particle output assembly; the feeding end of the pneumatic material conveying structure is communicated with the discharging ends of the denitration agent particle output assemblies; the discharge end of the pneumatic conveying structure is arranged in the chimney; the air source is communicated with the air inlet end of the pneumatic material conveying structure, and the air source is used for driving the crankshaft to rotate.

Description

Technical Field

[0001] The present invention belongs to the technical field of flue gas purification devices, and in particular relates to an industrial flue gas denitration device based on pneumatic conveying. Background Art

[0002] NOx in flue gas is harmful to human health and can also cause photochemical smog and acid rain. Currently, flue gas emissions from thermal power plants and the steel industry involve flue gas denitrification treatment. The main back-end denitrification technologies used are SCR (Selective Catalytic Reduction), SNCR (Selective Non-Catalytic Reduction), and a combination of SCR and SNCR. These three common processes use liquid ammonia, aqueous ammonia, or urea solution as reducing agents. However, liquid reducing agents can easily cause equipment corrosion and secondary pollution, leading to the emergence of solid denitrification agents.

[0003] However, existing flue gas denitrification equipment lacks a design for solid denitrification agent injection. Therefore, we propose an industrial flue gas denitrification device based on pneumatic conveying. Summary of the Invention

[0004] The purpose of the present invention is to provide an industrial flue gas denitrification device based on pneumatic conveying to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An industrial flue gas denitrification device based on pneumatic conveying, comprising:

[0007] base;

[0008] a crankshaft, rotatably disposed on the base;

[0009] A plurality of denitrification agent particle output components are drivingly connected to the crankshaft, and the denitrification agent particle output components are fixedly arranged;

[0010] A denitrification agent particle storage bin is provided on top of the plurality of denitrification agent particle output assemblies; a discharge end of the denitrification agent particle storage bin is connected to a feed end of the denitrification agent particle output assembly;

[0011] A pneumatic conveying structure, the feed end of which is connected to the discharge ends of the plurality of denitrification agent particle output assemblies; the discharge end of the pneumatic conveying structure is arranged in the chimney;

[0012] An air source is connected to the air inlet end of the pneumatic conveying structure, and the air source is used to drive the crankshaft to rotate.

[0013] Optionally, the base includes:

[0014] an air chamber rotatably connected to one end of the crankshaft;

[0015] a rotating seat, rotatably connected to the other end of the crankshaft;

[0016] a plurality of blades fixedly connected to one end of the crankshaft at equal intervals in the circumferential direction, wherein the plurality of blades are located in the air chamber;

[0017] The air inlet end of the air chamber is connected to the air source, and the air source blows the blades to rotate the crankshaft;

[0018] The air outlet end of the air chamber is communicated with the air inlet end of the pneumatic conveying structure.

[0019] Optionally, the denitrification agent particle output component includes:

[0020] a cylinder body, wherein the cylinder body is fixedly arranged;

[0021] A telescopic rod is vertically slidably arranged in the cylinder body; a vent hole is opened in the middle of the telescopic rod, the bottom end of the telescopic rod is hinged to the top end of the crankshaft connecting rod, and the bottom end of the crankshaft connecting rod is hinged to the crankshaft;

[0022] The telescopic rod slides upward so that the vent enters the cylinder body and the denitrification agent particles enter the vent, and the telescopic rod slides downward so that the vent is connected to the pneumatic conveying structure, and the denitrification agent particles in the vent enter the chimney through the pneumatic conveying structure;

[0023] A sleeve is fixedly connected between the cylinder body and the pneumatic conveying structure, and the telescopic rod slides vertically inside the sleeve.

[0024] Optionally, a plurality of collision blocks are fixedly connected to the inner wall of the cylinder at equal intervals in the circumferential direction, the collision blocks are in contact with a collision ring, and the collision ring is axially connected to the outer side of the telescopic rod;

[0025] The collision ring slides vertically in the cylinder.

[0026] Optionally, the top end of the telescopic rod is a conical structure.

[0027] Optionally, the number of the denitrification agent particle output components is an even number.

[0028] Optionally, the pneumatic conveying structure includes:

[0029] An air intake manifold, the air intake end of which is connected to the air outlet end of the air chamber;

[0030] A plurality of air inlet branch pipes, the air inlet ends of which are connected to the air inlet main pipe, the air outlet ends of the air inlet branch pipes are connected to the air inlet ends of the air outlet branch pipes, and the air outlet ends of the plurality of air outlet branch pipes are connected to the air inlet end of the same air outlet main pipe;

[0031] The telescopic rod passes through the middle of the air intake branch pipe, the vent hole moves into the air intake branch pipe and communicates with it, and the inner diameter of the air intake branch pipe matches the inner diameter of the vent hole;

[0032] The injection part has an air inlet end connected to the air outlet end of the air outlet main pipe, and the injection end of the injection part is located in the chimney.

[0033] Optionally, the injection unit includes:

[0034] A diverter pipe, the middle portion of which is connected to the gas outlet end of the gas outlet main pipe, and the diverter pipe is fixed to the inner wall of the chimney;

[0035] A plurality of spray guns are arranged at equal intervals along the height direction of the diverter pipe, the air inlet end of the spray gun is communicated with the diverter pipe, and the air outlet end of the spray gun is communicated with the chimney.

[0036] Optionally, the gas source includes:

[0037] The gas inlet end of the high-pressure gas cylinder is connected to the gas outlet end of the gas compression part, and the gas outlet end of the high-pressure gas cylinder is connected to the gas inlet end of the gas chamber.

[0038] Optionally, the gas compression unit includes a gas compressor, and the gas outlet end of the gas compressor is connected to the gas inlet end of the high-pressure gas cylinder.

[0039] Compared with the prior art, the present invention has the following advantages and technical effects:

[0040] During use, the denitrifier particles are stored in the denitrifier particle storage bin, which supplies the denitrifier particle output components. The gas source provides high-pressure gas to drive the crankshaft to rotate. At the same time, the high-pressure gas enters the pneumatic conveying structure. The crankshaft drives the denitrifier particle output components to operate and transfer a certain amount of denitrifier particles to the pneumatic conveying structure. The denitrifier particles enter the chimney along with the airflow entering the pneumatic conveying structure to denitrify the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order 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 use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0042] Figure 1 It is a schematic diagram of the structure of the present invention;

[0043] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0044] Figure 3 This is a top view of the pneumatic conveying structure pipeline of the present invention;

[0045] Figure 4 This is a diagram showing the arrangement of the diverter pipe and the spray gun in the chimney of the present invention;

[0046] Among them, 1. air chamber; 2. blades; 3. crankshaft; 4. crankshaft connecting rod; 5. telescopic rod; 6. intake manifold; 7. intake branch pipe; 8. vent; 9. sleeve; 10. cylinder block; 11. rotating seat; 12. high-pressure gas cylinder; 13. gas compressor; 14. collision block; 15. collision ring; 16. denitrification agent particle storage bin; 17. outlet branch pipe; 18. outlet manifold; 19. chimney; 20. diverter pipe; 21. spray gun. DETAILED DESCRIPTION

[0047] 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.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Reference Figures 1 to 4 The present invention discloses an industrial flue gas denitrification device based on pneumatic conveying, comprising:

[0050] base;

[0051] A crankshaft 3 is rotatably mounted on a base;

[0052] A plurality of denitrification agent particle output components are drivingly connected to the crankshaft 3, and the denitrification agent particle output components are fixedly arranged;

[0053] The denitrification agent particle storage bin 16 is arranged on top of the plurality of denitrification agent particle output components; the discharge end of the denitrification agent particle storage bin 16 is connected to the feed end of the denitrification agent particle output component;

[0054] The pneumatic conveying structure has a feed end connected to the discharge end of a plurality of denitrification agent particle output components; the discharge end of the pneumatic conveying structure is arranged in the chimney 19;

[0055] The air source is connected to the air inlet end of the pneumatic conveying structure, and the air source is used to drive the crankshaft 3 to rotate.

[0056] During use, the denitrifier particles are stored in the denitrifier particle storage bin 16, and the denitrifier particle storage bin 16 supplies the denitrifier particle output components. The gas source provides high-pressure gas to drive the crankshaft 3 to rotate. At the same time, the high-pressure gas enters the pneumatic conveying structure. The crankshaft 3 drives the denitrifier particle output components to operate and transfer a certain amount of denitrifier particles to the pneumatic conveying structure. The denitrifier particles enter the chimney 19 along with the airflow entering the pneumatic conveying structure to denitrify the flue gas.

[0057] As an optional embodiment, the base includes:

[0058] Air chamber 1, rotatably connected to one end of crankshaft 3;

[0059] The rotating seat 11 is rotatably connected to the other end of the crankshaft 3;

[0060] A plurality of blades 2 are fixedly connected to one end of a crankshaft 3 at equal intervals in the circumferential direction, and the plurality of blades 2 are located in the air chamber 1;

[0061] The air inlet end of the air chamber 1 is connected to the air source, and the air source blows the blades 2 to rotate the crankshaft 3;

[0062] The air outlet of the air chamber 1 is communicated with the air inlet of the pneumatic conveying structure.

[0063] A high-pressure airflow is injected into the air chamber 1 through an air source, and the high-pressure airflow blows toward the plurality of blades 2, so that the plurality of blades 2 drive the crankshaft 3 to rotate.

[0064] As an optional embodiment, the denitrification agent particle output component includes:

[0065] Cylinder body 10, cylinder body 10 is fixedly arranged;

[0066] The telescopic rod 5 is vertically slidably arranged in the cylinder body 10; a vent hole 8 is opened in the middle of the telescopic rod 5, the bottom end of the telescopic rod 5 is hinged to the top end of the crankshaft connecting rod 4, and the bottom end of the crankshaft connecting rod 4 is hinged to the crankshaft 3;

[0067] The telescopic rod 5 slides upward to allow the vent 8 to enter the cylinder 10, and the denitrification agent particles enter the vent 8. The telescopic rod 5 slides downward to connect the vent 8 with the pneumatic conveying structure, and the denitrification agent particles in the vent 8 enter the chimney 19 through the pneumatic conveying structure.

[0068] A sleeve 9 is fixedly connected between the cylinder body 10 and the pneumatic conveying structure, and the telescopic rod 5 slides vertically inside the sleeve 9 .

[0069] When the crankshaft 3 rotates, one end of the crankshaft connecting rod 4 is driven to rotate, and the other end of the crankshaft connecting rod 4 is connected to the telescopic rod 5, thereby causing the telescopic rod 5 to slide back and forth in the cylinder body 10.

[0070] A vent hole 8 is provided in the middle of the telescopic rod 5. When the telescopic rod 5 reciprocates, the vent hole 8 switches its position between the cylinder body 10 and the pneumatic feeding structure. When the vent hole 8 enters the cylinder body 10, the denitrification agent particles naturally fill the vent hole 8 under the action of gravity. As the vent hole 8 descends and enters the sleeve 9, both ends of the vent hole 8 are blocked. When the vent hole 8 enters the pneumatic feeding structure and is connected thereto, the airflow carries the denitrification agent particles in the vent hole 8 to the chimney 19.

[0071] The amount of denitrification agent particles that can be accommodated can be changed by changing the inner diameter of the vent hole 8 .

[0072] As an optional embodiment, a plurality of collision blocks 14 are fixedly connected to the inner wall of the cylinder body 10 at equal intervals in the circumferential direction. The collision blocks 14 are in contact with a collision ring 15, and the collision ring 15 is axially connected to the outer side of the telescopic rod 5.

[0073] The collision ring 15 slides vertically in the cylinder 10 .

[0074] The telescopic rod 5 is lifted and lowered to make the collision ring 15 reciprocate and collide with the collision block 14 to vibrate the cylinder 10, thereby vibrating the denitrification agent particles in the denitrification agent particle storage bin 16 into the cylinder 10 and also facilitating the denitrification agent particles in the cylinder 10 to move downward.

[0075] As an optional embodiment, the top end of the telescopic rod 5 is a conical structure.

[0076] The top of the telescopic rod 5 is configured as a conical structure so that it can squeeze the denitrification agent particles to both sides when it rises, without hindering the telescopic rod 5 from moving upward.

[0077] As an optional implementation, the number of denitrification agent particle output components is an even number.

[0078] The number of the denitrification agent particle output components of the present invention is preferably four. When the telescopic rods 5 of two of the denitrification agent particle output components rise to fill the material, the other two telescopic rods 5 descend to feed the material, thereby realizing uniform material discharge of the pneumatic feeding structure.

[0079] As an optional embodiment, the pneumatic conveying structure includes:

[0080] The air inlet manifold 6 has an air inlet end connected to an air outlet end of the air chamber 1;

[0081] A plurality of air inlet branch pipes 7, the air inlet ends of which are connected to the air inlet main pipe 6, the air outlet ends of the air inlet branch pipes 7 are connected to the air inlet ends of the air outlet branch pipes 17, and the air outlet ends of the plurality of air outlet branch pipes 17 are connected to the air inlet ends of the same air outlet main pipe 18;

[0082] The telescopic rod 5 passes through the middle of the air intake branch pipe 7, and the vent hole 8 moves into the air intake branch pipe 7 and communicates with it. The inner diameter of the air intake branch pipe 7 matches the inner diameter of the vent hole 8;

[0083] The air inlet end of the injection part is connected to the air outlet end of the air outlet main pipe 18, and the injection end of the injection part is located in the chimney 19.

[0084] As an optional embodiment, the injection unit includes:

[0085] The middle portion of the diverter pipe 20 is connected to the outlet end of the gas outlet main pipe 18 and the diverter pipe 20 is fixed to the inner wall of the chimney 19;

[0086] A plurality of spray guns 21 are arranged at equal intervals along the height direction of the diverter pipe 20 . The air inlet end of the spray gun 21 is connected to the diverter pipe 20 , and the air outlet end of the spray gun 21 is connected to the chimney 19 .

[0087] The high-pressure airflow enters each intake branch pipe 7 through the intake main pipe 6. When two of the intake branch pipes 7 are connected to the vent holes 8, the other two intake branch pipes 7 are blocked by the telescopic rod 5. When the crankshaft 3 rotates, the intake branch pipes 7 are alternately connected to the vent holes 8. When the vent holes 8 are connected to the intake branch pipes 7, the high-pressure airflow drives the denitrification agent particles to move into the diversion pipe 20. After being evenly divided in the diversion pipe 20, they enter each spray gun 21 and are sprayed into the chimney 19.

[0088] As an optional embodiment, the gas source includes:

[0089] The gas inlet end of the high-pressure gas cylinder 12 is connected to the gas outlet end of the gas compression part, and the gas outlet end of the high-pressure gas cylinder 12 is connected to the gas inlet end of the gas chamber 1.

[0090] As an optional embodiment, the gas compression unit includes a gas compressor 13 , and the gas outlet end of the gas compressor 13 is connected to the gas inlet end of the high-pressure gas cylinder 12 .

[0091] The core function of a gas compressor is to mechanically increase gas pressure. Their structure and operating principles are primarily categorized into two types: positive displacement and velocity compressors. Positive displacement compressors achieve pressure boosting by physically reducing the volume of gas within a confined space. Representative models include piston, screw, and vane types. Piston compressors rely on a crankshaft and connecting rod to drive the piston back and forth within the cylinder, cyclically completing the intake, compression, and exhaust processes. While their structure is simple, they suffer from high vibration and numerous wear parts. Screw compressors utilize a pair of intermeshing male and female rotors, rotating to gradually reduce the volume between the teeth and the grooves, resulting in continuous gas compression. They operate smoothly and are suitable for gases containing liquids, but rotor clearance maintenance is required after long-term use. Vane compressors employ radial vanes on an eccentric rotor. Centrifugal force forces the vanes against the cylinder wall, creating a dynamic compression chamber. While compact, they suffer from significant friction losses. Velocity compressors impart kinetic energy to the gas through a high-speed rotating impeller, which is then converted into pressure energy through a diffuser. These compressors primarily include centrifugal and axial flow types. Centrifugal compressors consist of multiple impellers connected in series, accelerating and expanding the gas in successive stages to achieve continuous pressure boosting. While suitable for high-flow scenarios, they are sensitive to gas properties and prone to surge. Axial-flow compressors, on the other hand, utilize kinetic energy gained by rotating blades along the axial direction, before being guided and pressurized by stationary vanes. While highly efficient, they require stringent manufacturing precision.

[0092] In the pneumatic conveying system for flue gas denitrification, the denitrifier particles need to be stably pressurized and injected into the flue gas duct. This working condition requires the compressor to have the characteristics of corrosion resistance, reliable sealing, and adaptability to medium flow and high pressure. The piston compressor is the best choice because of its high structural strength, wide pressure adaptability, and the ability to avoid medium contamination through oil-free lubrication design. The present invention uses a vertical reciprocating piston compressor, the cylinder of which is arranged vertically to reduce vibration, and integrates gas-liquid separation and explosion-proof motors to meet the continuity requirements of pressurization. At the same time, it has automatic protection functions such as low oil pressure and temperature exceeding the limit to ensure safe operation in industrial environments.

[0093] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0094] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An industrial flue gas denitrification device based on pneumatic conveying, characterized in that: include: base; a crankshaft (3) rotatably disposed on the base; A plurality of denitrification agent particle output components are drivingly connected to the crankshaft (3), and the denitrification agent particle output components are fixedly arranged; A denitrification agent particle storage bin (16) is arranged on top of the plurality of denitrification agent particle output assemblies; a discharge end of the denitrification agent particle storage bin (16) is connected to a feed end of the denitrification agent particle output assembly; A pneumatic conveying structure, the feed end of which is in communication with the discharge ends of the plurality of denitrification agent particle output assemblies; the discharge end of the pneumatic conveying structure is disposed in a chimney (19); An air source is connected to the air inlet end of the pneumatic conveying structure, and the air source is used to drive the crankshaft (3) to rotate.

2. The industrial flue gas denitrification device based on pneumatic conveying according to claim 1 is characterized in that: The base comprises: An air chamber (1) is rotatably connected to one end of the crankshaft (3); A rotating seat (11) is rotatably connected to the other end of the crankshaft (3); A plurality of blades (2) are fixedly connected to one end of the crankshaft (3) at equal intervals in the circumferential direction, and the plurality of blades (2) are located in the air chamber (1); The air inlet end of the air chamber (1) is connected to the air source, and the air source blows the blades (2) to rotate the crankshaft (3); The air outlet end of the air chamber (1) is communicated with the air inlet end of the pneumatic conveying structure.

3. The industrial flue gas denitrification device based on pneumatic conveying according to claim 2, characterized in that: The denitrification agent particle output component includes: A cylinder body (10), wherein the cylinder body (10) is fixedly arranged; A telescopic rod (5) is vertically slidably arranged in the cylinder body (10); a vent hole (8) is provided in the middle of the telescopic rod (5); the bottom end of the telescopic rod (5) is hinged to the top end of the crankshaft connecting rod (4); and the bottom end of the crankshaft connecting rod (4) is hinged to the crankshaft (3); The telescopic rod (5) slides upward so that the vent (8) enters the cylinder (10), and the denitrification agent particles enter the vent (8); the telescopic rod (5) slides downward so that the vent (8) is connected to the pneumatic conveying structure, and the denitrification agent particles in the vent (8) enter the chimney (19) through the pneumatic conveying structure; A sleeve (9) is fixedly connected between the cylinder body (10) and the pneumatic conveying structure, and the telescopic rod (5) slides vertically inside the sleeve (9).

4. The industrial flue gas denitrification device based on pneumatic conveying according to claim 3 is characterized in that: A plurality of collision blocks (14) are fixedly connected to the inner wall of the cylinder body (10) at equal intervals in the circumferential direction, and the collision blocks (14) are in contact with a collision ring (15), and the collision ring (15) is axially connected to the outer side of the telescopic rod (5); The collision ring (15) slides vertically in the cylinder (10).

5. The industrial flue gas denitrification device based on pneumatic conveying according to claim 3 is characterized in that: The top end of the telescopic rod (5) is a conical structure.

6. The industrial flue gas denitrification device based on pneumatic conveying according to claim 1, characterized in that: The number of the denitrification agent particle output components is even.

7. The industrial flue gas denitrification device based on pneumatic conveying according to claim 3 is characterized in that: The pneumatic conveying structure comprises: An air intake manifold (6), the air intake end of which is in communication with the air outlet end of the air chamber (1); A plurality of air inlet branch pipes (7), the air inlet ends of which are connected to the air inlet main pipe (6), the air outlet ends of the air inlet branch pipes (7) are connected to the air inlet ends of the air outlet branch pipes (17), and the air outlet ends of the plurality of air outlet branch pipes (17) are connected to the air inlet ends of the same air outlet main pipe (18); The telescopic rod (5) passes through the middle of the air intake branch pipe (7), and the vent hole (8) moves into the air intake branch pipe (7) and communicates with it. The inner diameter of the air intake branch pipe (7) matches the inner diameter of the vent hole (8); The injection part has an air inlet end that is in communication with the air outlet end of the air outlet main pipe (18), and the injection end of the injection part is located in the chimney (19).

8. The industrial flue gas denitrification device based on pneumatic conveying according to claim 7, characterized in that: The injection unit includes: A diverter pipe (20), the middle portion of which is connected to the gas outlet end of the gas outlet main pipe (18), and the diverter pipe (20) is fixed to the inner wall of the chimney (19); A plurality of spray guns (21) are arranged at equal intervals along the height direction of the diverter pipe (20), the air inlet end of the spray gun (21) is connected to the diverter pipe (20), and the air outlet end of the spray gun (21) is connected to the chimney (19).

9. The industrial flue gas denitrification device based on pneumatic conveying according to claim 2, characterized in that: The gas source includes: The high-pressure gas cylinder (12) has an air inlet end connected to the air outlet end of the gas compression unit, and the air outlet end of the high-pressure gas cylinder (12) is connected to the air inlet end of the gas chamber (1).

10. The industrial flue gas denitrification device based on pneumatic conveying according to claim 9, characterized in that: The gas compression unit comprises a gas compressor (13), and the gas outlet end of the gas compressor (13) is connected to the gas inlet end of the high-pressure gas cylinder (12).

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