Boiler flue gas dry denitration device

Abstract

The utility model provides a kind of boiler flue gas dry denitration device, belong to dry denitration device field, including boiler, spraying assembly and stirring assembly;The surface of boiler is equipped with feeding port, one side of boiler is equipped with solution barrel, and ammonia solution is contained in solution barrel inside;The utility model: installation frame is installed at the top of solution barrel, rotating motor is installed at the top of installation frame, rotating motor rotates and drives transmission rod to rotate in solution barrel inside by speed reducer, transmission rod rotation drives surface-mounted stirring vane to stir ammonia solution inside solution barrel, so that ammonia solution is in uniform mixing state during spraying process, avoid standing deposition to affect the effect of denitration, mesh cradle is equipped on the top of support frame, filter screen is placed on the surface of mesh cradle, and particle impurities in flue gas can be filtered after flue gas passes through filter screen upward after treatment, so that reduce particulate matter in emission flue gas.

Description

Technical Field

[0001] This utility model relates to the field of dry denitrification devices, specifically a dry denitrification device for boiler flue gas. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. During the boiler combustion and heating process, a large amount of flue gas is generated. This flue gas cannot be directly discharged and needs to be filtered and denitrified to remove harmful substances before being discharged. Dry denitrification technology mainly utilizes gaseous reactants such as ammonia water and urea to react chemically with nitrogen oxides in the flue gas, reducing them to nitrogen and water. In this process, no water is needed as a reaction medium, so no wastewater is generated, avoiding secondary pollution. Currently, some equipment that sprays ammonia liquid stores the prepared ammonia liquid in a storage tank. Long-term standing causes the ammonia liquid to precipitate, resulting in uneven mixing of the sprayed ammonia liquid and affecting the denitrification effect. Utility Model Content

[0003] The purpose of this invention is to provide a dry denitrification device for boiler flue gas to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dry denitrification device for boiler flue gas, comprising a boiler, a spraying assembly, and a stirring assembly;

[0005] Among them: the bottom of the transfer vehicle is equipped with movable wheels that rotate around it, and the top of the transfer vehicle is provided with an installation cavity;

[0006] The boiler has a feeding port installed on its surface, and a solution tank is provided on one side of the boiler, which contains an ammonia solution.

[0007] The spraying assembly includes a water pump installed at the bottom of a solution tank, a delivery pipe installed at the outlet of the water pump, one end of the delivery pipe extending into the interior of a boiler, a support frame installed on the top of the inner wall of the boiler, a main water pipe fixedly installed at the bottom of the support frame, multiple branch pipes fixedly installed on both sides of the surface of the main water pipe, multiple nozzles installed at the bottom of the branch pipes, and one end of the delivery pipe connected to the main water pipe.

[0008] The stirring assembly includes a mounting bracket fixed to the top of the solution tank. A rotary motor is fixedly mounted on the top of the mounting bracket. The output end of the rotary motor is connected to a transmission rod via a speed reducer. Stirring blades are fixedly mounted on the surface of the transmission rod.

[0009] As a preferred embodiment of this utility model: the top of the support frame is provided with a mesh bracket, and a filter screen is placed on the surface of the mesh bracket.

[0010] As a preferred embodiment of this utility model: external connectors are installed on the top and bottom sides of the solution tank, a connecting pipe is installed between the two external connectors, a scale plate is connected to one side of the connecting pipe, and the surface of the scale plate may be provided with capacity scale.

[0011] As a preferred embodiment of this utility model: a detachable top cover is installed on the top of the boiler, the mesh bracket is installed inside the detachable top cover, and an exhaust port is opened on the top of the boiler.

[0012] As a preferred embodiment of this utility model, a temperature sensor is installed on the surface of the boiler.

[0013] As a preferred embodiment of this utility model: a control panel is installed on the side of the boiler, and the water pump, the rotating motor and the temperature sensor are all electrically connected to the control panel, and the control panel is electrically connected to an external power supply.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) An installation frame is installed at the top of the solution tank. A rotating motor is installed at the top of the installation frame. After the rotating motor rotates, it drives the transmission rod to rotate inside the solution tank through the reducer. The rotation of the transmission rod drives the stirring blades installed on the surface to stir the ammonia solution inside the solution tank, so that the ammonia solution is in a uniformly mixed state during the spraying process, avoiding static sedimentation and thus affecting the denitrification effect.

[0016] (2) The water pump pumps the ammonia solution inside the solution tank into the delivery pipe, and then delivers it to the main water pipe installed at the bottom of the support frame. The main water pipe delivers the ammonia solution to the inside of the distribution pipe. The ammonia solution is atomized and sprayed out through the nozzle on the surface of the distribution pipe, so that the ammonia can fully react with the nitrogen oxides in the flue gas and reduce them to nitrogen and water, thus avoiding the generation of a large amount of harmful flue gas into the air during the boiler combustion heating process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the lifting component structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixing component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the bevel gear and bevel gear ring of this utility model.

[0021] In the diagram: 1. Boiler; 2. Feed inlet; 3. Solution tank; 4. Spraying assembly; 41. Water pump; 42. Delivery pipe; 43. Support frame; 44. Main water pipe; 45. Diversion pipe; 46. Nozzle; 5. Stirring assembly; 51. Mounting frame; 52. Rotary motor; 53. Transmission rod; 54. Stirring blade; 6. Mesh bracket; 7. Filter screen; 8. External connector; 9. Connecting pipe; 10. Scale plate; 11. Removable top cover; 12. Exhaust port; 13. Temperature sensor. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Please see Figures 1-4 A dry denitrification device for boiler flue gas includes: a boiler 1, a spraying assembly 4 and a stirring assembly 5; a feeding port 2 is installed on the surface of the boiler 1, and a solution tank 3 is provided on one side of the boiler 1, the solution tank 3 containing an ammonia solution.

[0024] Please see Figure 1 , Figure 2 The spraying assembly 4 includes a water pump 41 installed at the bottom of the solution tank 3. A delivery pipe 42 is installed at the outlet end of the water pump 41. One end of the delivery pipe 42 extends into the interior of the boiler 1. A support frame 43 is installed on the top of the inner wall of the boiler 1. A main water pipe 44 is fixedly installed at the bottom of the support frame 43. Multiple branch pipes 45 are fixedly installed on both sides of the surface of the main water pipe 44. Multiple nozzles 46 are installed at the bottom of the branch pipes 45. One end of the delivery pipe 42 is connected to the main water pipe 44.

[0025] In practical use: the water pump 41 pumps the ammonia solution inside the solution tank 3 into the delivery pipe 42, and then delivers it through the delivery pipe 42 to the main water pipe 44 installed at the bottom of the support frame 43. The main water pipe 44 delivers the ammonia solution to the inside of the distribution pipe 45. The ammonia solution is atomized and sprayed out through the nozzle 46 on the surface of the distribution pipe 45, so that the ammonia can fully react with the nitrogen oxides in the flue gas, reducing them into nitrogen and water, thus preventing the boiler 1 from generating a large amount of harmful flue gas and releasing it into the air during combustion and heating.

[0026] Please see Figure 1 , Figure 3The stirring assembly 5 includes a mounting bracket 51 fixed to the top of the solution tank 3. A rotary motor 52 is fixedly mounted on the top of the mounting bracket 51. The output end of the rotary motor 52 is connected to a transmission rod 53 through a reducer. A stirring blade 54 is fixedly mounted on the surface of the transmission rod 53.

[0027] In practical use: A mounting frame 51 is installed at the top of the solution tank 3, and a rotating motor 52 is installed at the top of the mounting frame 51. After the rotating motor 52 rotates, it drives the transmission rod 53 to rotate inside the solution tank 3 through the reducer. The rotation of the transmission rod 53 drives the stirring blade 54 installed on the surface to stir the ammonia solution inside the solution tank 3, so that the ammonia solution is in a uniformly mixed state during the spraying process, avoiding static sedimentation that would affect the denitrification effect.

[0028] Please see Figure 1 , Figure 4 The top of the support frame 43 is provided with a mesh bracket 6, and a filter screen 7 is placed on the surface of the mesh bracket 6. The top of the boiler 1 is equipped with a detachable top cover 11, and the mesh bracket 6 is installed inside the detachable top cover 11. The top of the boiler 1 is provided with an exhaust port 12.

[0029] In practical use: A mesh bracket 6 is provided on the top of the support frame 43, and a filter screen 7 is placed on the surface of the mesh bracket 6. After the flue gas is treated, it passes upward through the filter screen 7 to filter particulate impurities in the flue gas, thereby reducing particulate matter in the emitted flue gas. A detachable top cover 11 is installed on the top of the boiler 1, and the mesh bracket 6 is installed in the detachable top cover 11 so that the filter screen 7 can be cleaned and replaced to ensure filtration efficiency. The filtered flue gas is discharged through the exhaust port 12.

[0030] Please see Figure 3 External connectors 8 are installed on the top and bottom sides of the solution tank 3, and a connecting pipe 9 is installed between the two external connectors 8. A scale plate 10 is connected to one side of the connecting pipe 9, and the surface of the scale plate 10 may be provided with capacity scale.

[0031] In practical use: External connectors 8 are installed on the top and bottom of the side of the solution tank 3, and a connecting pipe 9 is installed between the two external connectors 8. The connecting pipe 9 is flush with the liquid level inside the solution tank 3, so that the amount of solution used can be known by the capacity scale on the scale plate 10 on the side of the connecting pipe 9.

[0032] Please see Figure 1 Temperature sensor 13 is installed on the surface of boiler 1.

[0033] In practical use: the temperature sensor 13 installed on the surface of boiler 1 facilitates the monitoring of the temperature inside boiler 1.

[0034] Please see Figure 1A control panel is installed on the side of the boiler 1. The water pump 41, the rotating motor 52 and the temperature sensor 13 are all electrically connected to the control panel. The control panel is electrically connected to an external power supply.

[0035] In practical use: When the control panel is connected to the external power supply, the water pump 41, the rotating motor 52 and the temperature sensor 13 are all powered on and controlled to run. When the control panel is disconnected from the external power supply, the equipment stops running.

[0036] The water pump 41 pumps the ammonia solution inside the solution tank 3 into the delivery pipe 42, and then through the delivery pipe 42 to the main water pipe 44 installed at the bottom of the support frame 43. The main water pipe 44 then delivers the ammonia solution into the distribution pipe 45. The ammonia solution is atomized and sprayed out through the nozzle 46 on the surface of the distribution pipe 45, so that the ammonia can fully react with the nitrogen oxides in the flue gas, reducing them into nitrogen and water, thus preventing the boiler 1 from generating a large amount of harmful flue gas and releasing it into the air during combustion and heating.

[0037] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dry denitrification device for boiler flue gas, characterized in that, include: Boiler (1), with a feeding port (2) installed on the surface of the boiler (1), and a solution tank (3) provided on one side of the boiler (1), the solution tank (3) containing an ammonia solution; The spraying assembly (4) includes a water pump (41) installed at the bottom of the solution tank (3), a delivery pipe (42) installed at the outlet end of the water pump (41), one end of the delivery pipe (42) extending into the interior of the boiler (1), a support frame (43) installed on the top of the inner wall of the boiler (1), a main water pipe (44) fixedly installed at the bottom of the support frame (43), multiple branch pipes (45) fixedly installed on both sides of the surface of the main water pipe (44), multiple nozzles (46) installed at the bottom of the branch pipes (45), and one end of the delivery pipe (42) connected to the main water pipe (44). The stirring assembly (5) includes a mounting bracket (51) fixed to the top of the solution tank (3). A rotating motor (52) is fixedly mounted on the top of the mounting bracket (51). The output end of the rotating motor (52) is connected to a transmission rod (53) through a reducer. A stirring blade (54) is fixedly mounted on the surface of the transmission rod (53).

2. The boiler flue gas dry denitrification device according to claim 1, characterized in that: The top of the support frame (43) is provided with a mesh bracket (6), and a filter screen (7) is placed on the surface of the mesh bracket (6).

3. The dry denitrification device for boiler flue gas according to claim 1, characterized in that: External connectors (8) are installed on the top and bottom sides of the solution tank (3), and a connecting pipe (9) is installed between the two external connectors (8). A scale plate (10) is connected to one side of the connecting pipe (9), and the surface of the scale plate (10) may be provided with capacity scale.

4. The dry denitrification device for boiler flue gas according to claim 2, characterized in that: The boiler (1) is equipped with a detachable top cover (11) at its top, and the mesh bracket (6) is installed inside the detachable top cover (11). The boiler (1) is provided with an exhaust port (12) at its top.

5. The boiler flue gas dry denitrification device according to claim 1, characterized in that: Temperature sensors (13) are installed on the surface of the boiler (1).

6. The boiler flue gas dry denitrification device according to claim 5, characterized in that: The boiler (1) is equipped with a control panel on its side. The water pump (41), the rotating motor (52) and the temperature sensor (13) are all electrically connected to the control panel. The control panel is electrically connected to an external power supply.

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