Novel denitration agent spraying device

Abstract

The utility model relates to the technical field of spraying devices, in particular to a novel denitration agent spraying device which comprises a spraying gun body, a spraying nozzle and a spraying nozzle. The pipeline is fixedly connected with the output end of the air cylinder; the spray head is fixedly mounted at one end of the pipeline; a clamping assembly is arranged on one side of the spray gun body; the clamping assembly comprises a box body, the box body is fixedly connected to one end of the spray gun body, a through groove is formed in the box body, and the pipeline penetrates through the through groove; according to the device, the double-shaft motor drives the lead screw mechanism to control the movement of the heating mechanism, the heating mechanism is moved to the spray head and the pipeline for heating, formed urea crystals are rapidly dissolved, blockage is avoided, and therefore the frequency of dismounting and cleaning the spray head by workers is reduced, the continuous operation time of the system is prolonged, and meanwhile the working efficiency is improved. And the nozzle is heated only when the nozzle is blocked or the fluidized bed furnace is shut down, so that energy waste caused by continuous heating is avoided.

Description

Technical Field

[0001] This utility model relates to the field of spraying device technology, and in particular to a novel denitrification agent spraying device. Background Technology

[0002] With increasingly stringent environmental protection requirements, denitrification technology is receiving more and more attention. As one of the core pieces of equipment in denitrification technology, the denitrification agent injection device plays an increasingly important role in industrial production. The denitrification agent injection device mainly consists of nozzles, a gas-liquid mixer, and injectors. Its working principle is to atomize the liquid denitrification agent into fine droplets through the nozzles, then mix it with the flue gas. After high-temperature combustion, the nitrogen oxides are reduced to nitrogen and water vapor, thereby achieving the purpose of denitrification.

[0003] When the boiler is operating at low temperatures, the urea spray liquid is prone to crystallization in the existing denitrification urea spray guns. The crystallization inside the denitrification urea nozzle causes blockage, which will directly affect the denitrification work. If the blocked spray gun is disassembled and cleaned manually, the process is cumbersome and time-consuming.

[0004] In related technologies, a heat tracing pipe is installed on the outside of the nozzle to continuously heat the connection between the nozzle and the spray gun, reducing the risk of nozzle blockage caused by urea crystallization. However, the internal working temperature of the fluidized bed furnace is high during heating, which places high demands on the material of the heat tracing pipe. Furthermore, due to the high temperature during heating inside the furnace, urea is less likely to block at the nozzle. Continuously heating the nozzle will waste energy and increase production costs. Utility Model Content

[0005] The purpose of this invention is to provide a novel denitrification agent injection device to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A novel denitrification agent injection device includes:

[0008] The spray gun body contains a cylinder;

[0009] The pipe is fixedly connected to the output end of the cylinder;

[0010] The nozzle is fixedly installed at one end of the pipe;

[0011] A clamping assembly is provided on one side of the spray gun body; the clamping assembly includes:

[0012] The housing is fixedly connected to one end of the spray gun body, and the interior of the housing is provided with a through groove, through which the pipe passes;

[0013] A dual-axis motor is fixedly installed inside the housing;

[0014] A lead screw is coaxially connected to the output end of the dual-axis motor, and the threads of the two lead screws are in opposite directions;

[0015] A sliding block is threaded to the outside of the lead screw, and the sliding block is slidably connected to the inside of the housing;

[0016] The base is fixedly connected to the bottom of the sliding block;

[0017] A heating mechanism is installed on one side of the base body and is used to heat the nozzle;

[0018] A ventilation panel is installed on the side of the enclosure to ventilate the interior of the enclosure.

[0019] Optionally, the heating mechanism includes:

[0020] The protective shell has a heating plate fixedly installed inside it;

[0021] The plug is fixedly connected to one side of the protective shell, and the plug is electrically connected to the heating plate.

[0022] Optionally, both the protective shell and the heating plate are arc-shaped to enclose the pipe and the nozzle.

[0023] Optionally, a fixing component is also included for securing the ventilation plate and the plug.

[0024] Optionally, the fixing component includes:

[0025] The No. 1 screw is installed on one side of the ventilation plate, and the ventilation plate is fixedly connected to the box body by the No. 1 screw;

[0026] Threaded holes are provided on both sides of the plug;

[0027] A through hole is formed inside the seat body, and the position of the through hole corresponds to that of the threaded hole;

[0028] The No. 2 screw is threaded into the inside of the plug, and the diameter of the end of the No. 2 screw is the same as the diameter of the through hole.

[0029] Optionally, guide blocks are fixedly connected to both sides of the sliding block, and the sliding block is slidably connected to the inside of the housing through the guide blocks.

[0030] Optionally, the seat, the heating mechanism, and the ventilation plate are a set, and two sets are provided inside the box.

[0031] Optionally, the bottom of the housing has a through groove to enhance ventilation for the heating mechanism.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] The device uses a dual-axis motor to drive a screw mechanism to control the movement of the heating mechanism, which is then moved to the nozzle and pipe for heating. This quickly dissolves the formed urea crystals, preventing blockages and reducing the number of times workers need to disassemble and clean the nozzles. This increases the system's continuous operating time. In addition, the nozzles are only heated when they are blocked or the fluidized bed furnace is shut down, avoiding energy waste caused by continuous heating. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the overall structure in this application;

[0036] Figure 2 This is a schematic diagram of the structure during heating in this application;

[0037] Figure 3 This is a schematic diagram of the clamping component in this application.

[0038] Figure 4 This is a schematic diagram of the heating mechanism in this application.

[0039] Figure label:

[0040] 1. Spray gun body; 2. Pipe; 3. Nozzle;

[0041] 4. Clamping assembly; 41. Housing; 42. Dual-axis motor; 43. Lead screw; 44. Sliding block; 45. Base; 46. Heating mechanism; 461. Protective shell; 462. Heating plate; 463. Plug; 47. Ventilation plate;

[0042] 5. Fixing components; 51. No. 1 screw; 52. Threaded hole; 53. Through hole; 54. No. 2 screw;

[0043] 6. Guide block; 7. Cylinder. Detailed Implementation

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In current technologies, a heat tracing pipe is installed on the outside of the nozzle to continuously heat the connection between the nozzle and the spray gun, reducing the risk of nozzle blockage caused by urea crystallization. However, the internal working temperature of the fluidized bed furnace is high during heating, which places high demands on the material of the heat tracing pipe. Furthermore, due to the high temperature during heating inside the furnace, urea is less likely to block at the nozzle. Continuously heating the nozzle would waste energy and increase production costs.

[0047] Combination Figures 1-4 This application provides a novel denitrification agent injection device, comprising: a spray gun body 1, which has a cylinder 7 inside; a pipe 2, which is fixedly connected to the output end of the cylinder 7; a nozzle 3, which is fixedly installed at one end of the pipe 2; and a clamping assembly 4 on one side of the spray gun body 1. The clamping assembly 4 includes: a housing 41, which is fixedly connected to one end of the spray gun body 1, and the housing 41 has a through groove through which the pipe 2 passes; a dual-axis motor 42, which is fixedly installed inside the housing 41; a lead screw 43, which is coaxially connected to the output end of the dual-axis motor 42, and the threads of the two lead screws 43 are opposite; a sliding block 44, which is threaded to the outside of the lead screw 43 and is slidably connected to the inside of the housing 41; a base 45, which is fixedly connected to the bottom of the sliding block 44; a heating mechanism 46, which is installed on one side of the base 45 for heating the nozzle 3; and a ventilation plate 47, which is installed on the side of the housing 41 for ventilating the inside of the housing 41.

[0048] The spray gun body 1 is a pneumatic telescopic spray gun. When in use, the start cylinder 7 pushes the connecting plate (not shown in the figure) to move the upper pipe 2, so that the pipe 2 moves into the interior of the fluidized bed furnace. Then, the reducing agent (urea or ammonia, etc.) liquid is sprayed into the furnace of the fluidized bed furnace through the nozzle 3 by high pressure gas to reduce nitrogen oxides, thereby achieving denitrification. (The high pressure gas and reducing agent are mixed by a gas-liquid mixer. The gas-liquid mixer is existing technology and is not shown in the figure, so it will not be described in detail here.)

[0049] When the boiler operates at low temperatures, the urea spray liquid will crystallize. Crystals can precipitate at room temperature when the urea concentration is 50%. These crystals easily clog the inside of nozzle 3, preventing the reducing agent liquid from being sprayed out normally, thus affecting the denitrification process. At this time, cylinder 7 is activated to retract pipe 2 and nozzle 3 into the housing 41. Then, the dual-shaft motor 42 is activated, driving the lead screws 43 on both sides to rotate synchronously. Since the threads of the two lead screws 43 are opposite, the two sliding blocks 44 will move in opposite directions. As the dual-shaft motor 42 drives the two sliding blocks 44 to approach each other, the two heating mechanisms 46 will also approach each other under the influence of the base 45 until the heating plate 462 is in contact with pipe 2 and nozzle 3. The dual-shaft motor 42 is then turned off. One end of the heating plate 462 is equipped with a plug 463, which is inserted into a slot (not shown in the figure) inside the base 45. This slot is electrically connected to an external power source (not shown in the figure). At this time, the external power supply is turned on. The heating plate 462 is equipped with a metal resistance wire. When the power is turned on, the surface of the heating plate 462 will generate heat due to the high resistance of the resistance wire (this is existing technology and will not be described in detail here), thereby heating the pipe 2 and the nozzle 3, so that the ambient temperature is higher than the crystallization temperature of urea. The crystallization temperature of 50% urea solution is 18°C. As the nozzle 3 and the connection between the nozzle 3 and the pipe 2 gradually heat up, the crystals produced by urea will gradually dissolve in the liquid inside the pipe 2, thereby reducing the blockage inside the nozzle 3. This makes it less likely for the nozzle 3 to become blocked when the fluidized bed furnace is at a low temperature or when the fluidized bed furnace is shut down, reducing the workload of the staff in unblocking and replacing the nozzle 3. After the nozzle 3 is clear, the dual-axis motor 42 is turned in reverse, driving the two sliding blocks 44 to move in the opposite direction, so that the two heating plates 462 are separated from the pipe 2 and the nozzle 3. Then the cylinder 7 is started to push the pipe 2 and the nozzle 3 into the fluidized bed furnace for use.

[0050] In some embodiments, the heating mechanism 46 includes: a protective shell 461, in which a heating plate 462 is fixedly installed; and a plug 463, which is fixedly connected to one side of the protective shell 461 and electrically connected to the heating plate 462. The outer surfaces of the protective shell 461 and the heating plate 462 are both made of insulating material to reduce the risk of damage to other electrical equipment (such as the dual-axis motor 42) due to leakage of the resistance wire inside the heating plate 462.

[0051] In some embodiments, both the protective shell 461 and the heating plate 462 are arc-shaped. When the two heating plates 462 are close to each other, the pipe 2 and the nozzle 3 can be wrapped by the arc of the side of the heating plate 462 that is close to each other, thereby increasing the heating effect.

[0052] In some embodiments, a fixing component 5 is also included, which is used to fix the ventilation plate 47 and the plug 463.

[0053] In some embodiments, the fixing component 5 includes: a first screw 51, which is installed on one side of the ventilation plate 47 and the ventilation plate 47 is fixedly connected to the housing 41 by the first screw 51; a threaded hole 52, which is opened on both sides of the plug 463; a through hole 53, which is opened inside the base 45 and the through hole 53 corresponds to the position of the threaded hole 52; and a second screw 54, which is threaded into the inside of the plug 463 and the diameter of the end of the second screw 54 is the same as the diameter of the through hole 53.

[0054] When the heating mechanism 46 needs maintenance or replacement, the operator first unscrews the No. 1 screw 51 on the ventilation plate 47 one by one to disconnect the ventilation plate 47 from the housing 41. Then, the ventilation plate 47 is removed, the power supply connected to the base 45 is disconnected, the dual-axis motor 42 is started, and the sliding block 44 is moved to a position close to the original ventilation plate 47. The operator inserts the tool into the inside of each through hole 53 and unscrews the No. 2 screw 54 by aligning it with the cross hole on the No. 2 screw 54. Then, the protective shell 461 is pushed away from the plug 463 to pull out the protective shell 461, thus facilitating the maintenance and replacement of the heating mechanism 46.

[0055] In some embodiments, guide blocks 6 are fixedly connected to both sides of the sliding block 44, and the sliding block 44 is slidably connected to the inside of the housing 41 through the guide blocks 6, and is slidably connected to the sliding groove (not shown in the figure) inside the housing 41 through the guide blocks 6, thereby enhancing the sliding stability of the sliding block 44.

[0056] In some embodiments, the seat 45, heating mechanism 46 and ventilation plate 47 are a group, and two groups are provided inside the housing 41 to ensure the ventilation effect of the heating mechanism 46.

[0057] In some embodiments, a through groove is provided at the bottom of the housing 41. The through groove cooperates with the ventilation plate 47 to enhance the ventilation effect of the heating mechanism 46, and facilitates the cooling of the heating plate 462 after the heating mechanism 46 is used.

[0058] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A novel denitration agent injection device characterized by, include: The spray gun body contains a cylinder; The pipe is fixedly connected to the output end of the cylinder; The nozzle is fixedly installed at one end of the pipe; A clamping assembly is provided on one side of the spray gun body; the clamping assembly includes: The housing is fixedly connected to one end of the spray gun body, and the interior of the housing is provided with a through groove, through which the pipe passes; A dual-axis motor is fixedly installed inside the housing; A lead screw is coaxially connected to the output end of the dual-axis motor, and the threads of the two lead screws are in opposite directions; A sliding block is threaded to the outside of the lead screw, and the sliding block is slidably connected to the inside of the housing; The base is fixedly connected to the bottom of the sliding block; A heating mechanism is installed on one side of the base body and is used to heat the nozzle; A ventilation panel is installed on the side of the enclosure to ventilate the interior of the enclosure.

2. A novel denitration agent injection device according to claim 1, characterized in that, The heating mechanism includes: The protective shell has a heating plate fixedly installed inside it; The plug is fixedly connected to one side of the protective shell, and the plug is electrically connected to the heating plate.

3. A novel denitration agent injection device according to claim 2, characterized in that: Both the protective shell and the heating plate are arc-shaped and are used to wrap the pipe and the nozzle.

4. A novel denitration agent injection device according to claim 2, characterized in that, It also includes a fixing component for securing the ventilation plate and the plug.

5. A novel denitration agent injection device according to claim 4, characterized in that, The fixing component includes: The No. 1 screw is installed on one side of the ventilation plate, and the ventilation plate is fixedly connected to the box body by the No. 1 screw; Threaded holes are provided on both sides of the plug; A through hole is formed inside the seat body, and the position of the through hole corresponds to that of the threaded hole; The No. 2 screw is threaded into the inside of the plug, and the diameter of the end of the No. 2 screw is the same as the diameter of the through hole.

6. A novel denitrification agent injection device according to claim 1, characterized in that: Guide blocks are fixedly connected to both sides of the sliding block, and the sliding block is slidably connected to the inside of the box through the guide blocks.

7. A novel denitration agent injection device according to claim 1, characterized in that: The base, the heating mechanism, and the ventilation plate form one set, and two sets are arranged inside the box.

8. The novel denitrification agent injection device according to claim 1, characterized in that: The bottom of the housing has a through groove to enhance ventilation for the heating mechanism.

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