Flue decoking agent feeding device

Abstract

The embodiment of the utility model provides a flue decoking agent feeding device which comprises an agent storage bin, a feeding port, a discharging port, a feeding port, a decoking agent feeding port, a decoking agent feeding port and a decoking agent feeding port, the metering and feeding mechanism is arranged at the discharge hole; the material spraying mechanism comprises a conveying fan, an ejector and a spray gun, the conveying fan is connected with the ejector, the ejector is connected with the spray gun, the spray gun is installed on the flue, and the ejector is connected with the metering and feeding mechanism. The decoking agent is stored through the agent storage bin, the decoking agent is metered and fed through the metering and feeding mechanism, so that the decoking agent enters the ejector quantitatively, the conveying fan conveys wind power into the ejector, the ejector ejects the decoking agent through the spray gun, the spray gun sprays the decoking agent into a flue, and decoking operation in the flue is achieved. And the coverage rate is larger than 60% through the specified dosing position, spraying speed, insertion angle, spraying gun scattering angle, powder granularity and incineration flue gas flow speed.

Description

Technical Field

[0001] This specification relates to the technical field of flue decoking, and in particular to a flue decoking agent dosing device. Background Art

[0002] Existing hazardous waste incineration requires an incinerator temperature of 1100°C or higher. Some materials contain precursors that form coke, which melt at high temperatures and enter the secondary combustion chamber, outlet flue, boiler, and other incineration flue gas systems with the flue gas. Coke forms and solidifies on the furnace walls, flue bends, and boiler heat exchange tubes. Over time, this accumulates. If not promptly addressed, this can affect incinerator slag discharge and flue ventilation, and can even create the risk of large slag dropping, necessitating furnace shutdown and cleaning, severely hindering the long-term, stable operation of the incineration system. Summary of the Invention

[0003] In view of this, the embodiment of this specification provides a flue decoking agent dosing device, which stores the decoking agent in a reagent storage bin, and meteringly loads the decoking agent through a metering feeding mechanism, so that the decoking agent enters the injector in a quantitative manner, and the conveying fan conveys wind force into the injector. The injector sprays the decoking agent through a spray gun, and the spray gun is installed on the flue. The spray gun sprays the decoking agent into the inside of the flue, thereby realizing the decoking operation inside the flue.

[0004] The embodiments of this specification provide the following technical solutions: a flue decoking agent dosing device, comprising:

[0005] A reagent storage bin, the reagent storage bin is used to store the decoking agent, and the reagent storage bin is provided with a feeding port and a discharging port;

[0006] a metering and feeding mechanism, the metering and feeding mechanism being arranged at the discharge port and being used for metering and feeding the decoking agent flowing out of the discharge port;

[0007] The spraying mechanism includes a conveying fan, an injector and a spray gun. The conveying fan is connected to the injector through a first connecting pipe, and the injector is connected to the spray gun through a second connecting pipe. The spray gun is installed on the flue. The injector is connected to the metering feeding mechanism, and the metering feeding mechanism measures and delivers the decoking agent into the injector.

[0008] Preferably, the spray gun includes a gun body, a conical nozzle and an air cooling jacket, the air cooling jacket is arranged outside the gun body, and the conical nozzle at least partially extends into the interior of the flue.

[0009] Preferably, the spray gun is inserted at an angle of 25° to 75° perpendicular to the flue, with a scattering angle of 30° to 60°. The spray gun is installed 1.5m to 3m before the large elbow at the flue outlet. The decoking agent has an initial injection velocity of 20 to 50m / s, a flue gas velocity of 7.5 to 20m / s in the flue, and a particle size of 125 to 625μm.

[0010] Preferably, the spray gun is a powder spray gun.

[0011] Preferably, the metering feeding mechanism includes a weighing feeder and an electric feeder, the inlet end of the weighing feeder is arranged at the discharge port, the outlet end of the weighing feeder is connected to the inlet end of the electric feeder, and the weighing feeder is used to quantitatively deliver the decoking agent to the electric feeder.

[0012] Preferably, the electric feeder includes a motor, a feed pipe and a spiral conveying rod, the motor is arranged at the side end of the feed pipe, the output end of the motor is connected to the spiral conveying rod, the spiral conveying rod is arranged inside the feed pipe, and the feed pipe is provided with a feed port and a discharge port, the feed port is connected to the outlet end of the weighing feeder, and the discharge port is connected to the inlet end of the injector.

[0013] Preferably, the medicine storage bin is bucket-shaped.

[0014] Preferably, a material level meter alarm is provided at the lower portion of the medicine storage bin, and the material level meter alarm at least partially extends into the interior of the medicine storage bin.

[0015] Preferably, the dosing device further includes a dust collector, and the dust collector is arranged on the top of the medicine storage bin.

[0016] Preferably, the conveying blower is a Roots blower;

[0017] And / or, the ejector is a Venturi ejector.

[0018] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0019] The decoking agent is stored in a reagent storage bin and metered into a metering feeding mechanism so that the decoking agent enters the ejector in a quantitative manner. A conveying fan delivers wind into the ejector, and the ejector sprays the decoking agent through a spray gun installed on a flue. The spray gun sprays the decoking agent into the flue to achieve decoking inside the flue. A coverage rate of more than 60% is achieved by specifying the dosing position, injection speed, insertion angle, spray gun scattering angle, powder particle size, and incineration flue gas flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the flue decoking agent dosing device provided by the present application;

[0022] Figure 2 This is a schematic diagram of the structure of the flue decoking agent dosing device provided by the present application after omitting the spray gun;

[0023] Figure 3 This is a schematic diagram of the structure of the electric feeder of the flue decoking agent dosing device provided by the present application;

[0024] Figure 4 This is a schematic diagram of the injection of the decoking agent in the flue of the flue decoking agent dosing device provided in this application.

[0025] In the figure, 1. Chemical storage bin; 2. Measuring and feeding mechanism; 21. Weighing feeder; 22. Electric feeder; 221. Motor; 222. Feed pipe; 223. Screw conveyor rod; 3. Conveying fan; 4. First connecting pipe; 5. Ejector; 6. Second connecting pipe; 7. Spray gun; 8. Flue; 9. Mounting port; 10. Material level meter alarm; 11. Dust collector. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0028] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0030] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0031] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0032] Existing hazardous waste incineration requires an incinerator temperature of 1100°C or higher. Some materials contain precursors that form coke, which melt at high temperatures and enter the secondary combustion chamber, outlet flue, boiler, and other incineration flue gas systems with the flue gas. Coke forms and solidifies on the furnace walls, flue bends, and boiler heat exchange tubes. Over time, this accumulates. If not promptly addressed, this can affect incinerator slag discharge and flue ventilation, and can even create the risk of large slag dropping, necessitating furnace shutdown and cleaning, severely hindering the long-term, stable operation of the incineration system.

[0033] Currently, a variety of online decoking agents (liquid, solid powder, etc.) are available on the market to address coking issues, with dosing methods ranging from powder pneumatic conveying to liquid two-fluid spray guns. However, the dosing device has a significant impact on the decoking agent's performance. Among these factors are the spray gun's dosing position, insertion angle, initial decoking agent injection velocity, scattering angle, incineration flue gas flow rate, and decoking agent particle size. These factors can affect the decoking agent's trajectory in the fly ash flow field at the secondary combustion chamber's exit duct, preventing the agent from reaching the designated coking location or causing it to drift, resulting in low effective decoking agent utilization.

[0034] like Figures 1-4 As shown, a flue decoking agent dosing device includes:

[0035] A reagent storage bin 1, which is used to store the decoking agent and is provided with a feeding port and a discharging port;

[0036] A metering and feeding mechanism 2 is provided at the discharge port and is used to meter and feed the decoking agent flowing out of the discharge port;

[0037] The spraying mechanism includes a conveying fan 3, an injector 5 and a spray gun 7. The conveying fan 3 is connected to the injector 5 through a first connecting pipe 4, and the injector 5 is connected to the spray gun 7 through a second connecting pipe 6. The spray gun 7 is installed on the flue 8. The injector 5 is connected to the metering feeding mechanism 2, and the metering feeding mechanism 2 measures and delivers the decoking agent to the injector 5.

[0038] The flue 8 is provided with an installation port 9 for installing a spray gun 7. The spray gun 7 is installed at a specified position of the flue 8. The decoking agent is added to the reagent storage bin 1 through the feeding port. The decoking agent is stored in the reagent storage bin 1 and flows into the metering feeding mechanism 2 through the discharge port. The decoking agent is metered and fed by the metering feeding mechanism 2 so that the decoking agent enters the ejector 5 in a quantitative manner. The conveying fan 3 conveys wind power to the ejector 5 through the first connecting pipe 4. The ejector 5 blows the decoking agent into the spray gun 7 through the second connecting pipe 6. The decoking agent is then ejected through the spray gun 7. The spray gun 7 sprays the decoking agent into the interior of the flue 8, thereby achieving the decoking operation inside the flue 8.

[0039] It should be noted that the installation position of the spray gun 7 is in the area 1.5-3 meters in front of the large elbow of the flue 8 outlet, the initial velocity of the decoking agent injection is 20-50m / s, the insertion angle of the spray gun 7 is between 25-75° and the vertical direction of the flue 8, the scattering angle of the spray gun 7 is between 30-60°, the flue gas flow rate generated by the incineration load is 7.5-20m / s, the particle size of the decoking agent is 125μm~625μm, and the particle size of the decoking agent can be selected as 125μm, 375μm, and 625μm, which can achieve a decoking agent coverage rate of more than 60%.

[0040] like Figure 1 As shown, in some embodiments, the spray gun 7 includes a gun body, a conical nozzle and an air-cooling jacket, wherein the air-cooling jacket is arranged on the outside of the gun body, and the conical nozzle at least partially extends into the interior of the flue 8. By adopting the conical nozzle, the spraying efficiency is high, and the spraying angle is easy to adjust. By arranging the air-cooling jacket on the outside of the gun body, efficient heat dissipation of the gun body can be achieved, ensuring that the heat transferred to the gun body from the flue 8 is quickly dissipated.

[0041] like Figure 1 and Figure 4 As shown, in some embodiments, the insertion angle of the spray gun 7 is 25° to 75° with respect to the vertical direction of the flue 8, and the scattering angle of the spray gun 7 is 30° to 60°. By limiting the insertion angle and scattering angle of the spray gun 7, the spraying effect of the decoking agent can be ensured, and a higher coverage rate of the decoking agent on the inside of the flue 8 can be achieved.

[0042] like Figure 1 As shown, in some embodiments, the spray gun 7 is a powder spray gun. By using the powder spray gun 7 to spray the decoking agent, the spraying efficiency is high and the decoking agent is easily distributed to the inner wall of the flue 8.

[0043] like Figure 1-Figure 3 As shown, in some embodiments, the metering feeding mechanism 2 includes a weighing feeder 21 and an electric feeder 22, the inlet end of the weighing feeder 21 is arranged at the discharge port, and the outlet end of the weighing feeder 21 is connected to the inlet end of the electric feeder 22, and the weighing feeder 21 is used to quantitatively deliver the decoking agent to the electric feeder 22. By adopting the weighing feeder 21, the decoking agent flowing out of the discharge port can be quantitatively delivered to the electric feeder 22, and the electric feeder 22 delivers the quantitative decoking agent to the injector 5, which can achieve high-precision quantitative feeding.

[0044] like Figure 3 As shown, in some embodiments, the electric feeder 22 includes a motor 221, a feed pipe 222 and a spiral conveying rod 223, the motor 221 is arranged at the side end of the feed pipe 222, the output end of the motor 221 is connected to the spiral conveying rod 223, the spiral conveying rod 223 is arranged inside the feed pipe 222, and the feed pipe 222 is provided with a feed port and a discharge port, the feed port is connected to the outlet end of the weighing feeder 21, and the discharge port is connected to the inlet end of the injector 5. When the weighing feeder 21 conveys the decoking agent into the feed pipe 222, the motor 221 starts to drive the spiral conveying rod 223 to rotate, and the spiral conveying rod 223 conveys the material to the discharge port of the feed pipe 222, and the decoking agent enters the injector 5 through the discharge port of the feed pipe 222.

[0045] like Figure 1-Figure 2 As shown, in some embodiments, the reagent storage bin 1 is bucket-shaped. By adopting the bucket-shaped reagent storage bin 1, the reagent storage bin 1 is larger at the top and smaller at the bottom, and the discharge port is set at the bottom of the reagent storage bin 1, so as to facilitate the decoking agent to flow from the reagent storage bin 1 into the metering feeding mechanism 2.

[0046] like Figure 1-Figure 2As shown, in some embodiments, a level meter alarm 10 is provided at the lower portion of the reagent storage bin 1, and the level meter alarm 10 at least partially extends into the interior of the reagent storage bin 1. By providing the level meter alarm 10 at the lower portion of the reagent storage bin 1, the level height of the decoking agent in the reagent storage bin 1 can be monitored. When the level of the decoking agent in the reagent storage bin 1 reaches a preset lower limit, the level meter alarm 10 will sound an alarm to remind the staff to replenish the decoking agent.

[0047] like Figure 1-Figure 2 As shown, in some embodiments, the dosing device also includes a dust collector 11, and the dust collector 11 is arranged on the top of the medicine storage bin 1. By arranging the dust collector 11 on the top of the medicine storage bin 1, the dust collector 11 can play a role in dust removal and prevent dust from entering the interior of the medicine storage bin 1.

[0048] like Figure 1-Figure 2 As shown, in some embodiments, the conveying blower 3 is a Roots blower. By adopting the Roots blower for conveying, the Roots blower has lower gas consumption and energy consumption under the same exhaust volume, and the output air is clean. Due to the reasonable sealing structure of the Roots blower, oil cannot enter the casing, so the output air does not contain any oil and dust, ensuring the cleanliness of the air;

[0049] The ejector 5 is a Venturi ejector 5. Compared with the traditional pneumatic conveying system, the Venturi ejector 5 does not generate return air during the conveying process, which avoids the problems of poor material feeding and material wear caused by return air. At the same time, the Venturi ejector 5 uses the suction force generated by the positive pressure air generated by the blower or air compressor flowing through the ejector 5, which can efficiently suck and convey the material to the designated location.

[0050] The same or similar parts between the various embodiments in this specification can be referred to in conjunction with each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0051] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A flue decoking agent dosing device, characterized in that: include: A reagent storage bin, the reagent storage bin is used to store the decoking agent, and the reagent storage bin is provided with a feeding port and a discharging port; a metering and feeding mechanism, the metering and feeding mechanism being arranged at the discharge port and being used for metering and feeding the decoking agent flowing out of the discharge port; The spraying mechanism includes a conveying fan, an injector and a spray gun. The conveying fan is connected to the injector through a first connecting pipe, and the injector is connected to the spray gun through a second connecting pipe. The spray gun is installed on the flue. The injector is connected to the metering feeding mechanism, and the metering feeding mechanism measures and delivers the decoking agent into the injector.

2. The flue decoking agent dosing device according to claim 1, characterized in that: The spray gun comprises a gun body, a conical nozzle and an air cooling jacket, wherein the air cooling jacket is arranged outside the gun body, and the conical nozzle at least partially extends into the interior of the flue.

3. The flue decoking agent dosing device according to claim 2, characterized in that: The insertion angle of the spray gun is 25° to 75° with respect to the vertical direction of the flue, the scattering angle of the spray gun is 30° to 60°, the spray gun is installed 1.5m to 3m in front of the large elbow of the flue outlet, the initial injection velocity of the decoking agent is 20 to 50m / s, the flue gas flow velocity in the flue is 7.5 to 20m / s, and the particle size of the decoking agent is 125 to 625μm.

4. The flue decoking agent dosing device according to any one of claims 1 to 3, characterized in that: The spray gun is a powder spray gun.

5. The flue decoking agent dosing device according to claim 1, characterized in that: The metering feeding mechanism includes a weighing feeder and an electric feeder. The inlet end of the weighing feeder is arranged at the discharge port, and the outlet end of the weighing feeder is connected to the inlet end of the electric feeder. The weighing feeder is used to quantitatively deliver the decoking agent to the electric feeder.

6. The flue decoking agent dosing device according to claim 5, characterized in that: The electric feeder includes a motor, a feed pipe and a spiral conveying rod. The motor is arranged at the side end of the feed pipe, the output end of the motor is connected to the spiral conveying rod, the spiral conveying rod is arranged inside the feed pipe, and the feed pipe is provided with a feed port and a discharge port. The feed port is connected to the outlet end of the weighing feeder, and the discharge port is connected to the inlet end of the injector.

7. The flue decoking agent dosing device according to claim 1, characterized in that: The medicine storage bin is bucket-shaped.

8. The flue decoking agent dosing device according to claim 7, characterized in that: A material level meter alarm is provided at the lower part of the medicine storage bin, and the material level meter alarm at least partially extends into the interior of the medicine storage bin.

9. The flue decoking agent dosing device according to claim 7, characterized in that: The dosing device further comprises a dust collector, which is arranged on the top of the medicine storage bin.

10. The flue decoking agent dosing device according to claim 1, characterized in that: The conveying blower is a Roots blower; And / or, the ejector is a Venturi ejector.

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