A rotary kiln auxiliary heating device

Abstract

The utility model belongs to the field of chain grate-rotary kiln technology and is an auxiliary heating device for a rotary kiln. The rotary kiln pelletizer comprises a pulverized coal burner (1), a nozzle (2) is arranged at one end of the pulverized coal burner (1), a hook (3) is arranged at one end of the pulverized coal burner (1) where the nozzle (2) is arranged, and a metal hanging rope (5) is arranged on the auxiliary heating container (4), and the metal hanging rope (5) is hooked on the hook (3). The auxiliary heating device for a rotary kiln of the utility model can conveniently and quickly increase the heating speed of the pulverized coal burner, prevent flameout, reduce heating time and heating cost, and improve pellet production efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of chain grate machine-rotary kiln, and more specifically, relates to an auxiliary heating device of a rotary kiln. Background Art

[0002] In the grate-rotary kiln pellet production process, pulverized coal can be used as the main fuel if natural gas, converter gas or heavy oil is not available as the main fuel. Pulverized coal has better economic effect as the main fuel, but it has disadvantages such as uneven combustion and easier ring formation in the rotary kiln. Due to the high ignition point of pulverized coal (300-600℃), diesel needs to be used to slowly heat up in the early stage of heating, and the heating time is generally more than 8 hours. If there are high moisture content in pulverized coal, many diesel impurities, and too much pulverized coal injection, it is easy to extinguish during the heating process, causing the kiln head temperature to drop and repeated long-term heating, which affects the normal operation of the equipment.

[0003] In the prior art, there is a technology named "double vortex pulverized coal burner for pelletizing rotary kiln" and the publication number is "CN109611836A", which discloses a double vortex pulverized coal burner for pelletizing rotary kiln, including an igniter and a support base, a fixed frame is mounted on the support base, a sliding block is mounted on the fixed frame, a moving plate is fixed on the sliding block, a threaded lifting body is mounted on the moving plate, a rotating arm is fixed on the driving end of the threaded lifting body, a support frame is fixed on the rotating arm and located at an end away from the threaded lifting body, an igniter fixing frame is mounted on the support frame, a tightening plate is fixed on the telescopic end of the igniter fixing frame, a tightening mechanism is provided on the tightening plate, the igniter is mounted on the tightening mechanism, and a temperature sensor is also mounted on the support base, which is connected to the igniter through a wire. The present invention is an automated detection system, which does not require manual contact with the battery, making the detection equipment more intelligent, faster and more convenient. However, the technology does not involve the technical problems and technical solutions of the present application. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, to provide a rotary kiln auxiliary heating device which has a simple structure and can conveniently and quickly increase the heating speed of the pulverized coal burner, prevent flameout, reduce the heating time and heating cost, and improve the pellet production efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is:

[0006] The utility model is an auxiliary heating device for a rotary kiln. The rotary kiln pelletizer comprises a pulverized coal burner. A nozzle is arranged at one end of the pulverized coal burner. A hook is also arranged at the end of the pulverized coal burner where the nozzle is arranged. A metal hanging rope is arranged on the auxiliary heating container. The metal hanging rope is hooked on the hook.

[0007] A fuel adding port is arranged on the upper part of the auxiliary heating container.

[0008] The pulverized coal burner is located inside the rotary kiln.

[0009] The rotary kiln auxiliary heating device also includes an ignition long rod.

[0010] The auxiliary heating container is a structure made of high temperature resistant metal material.

[0011] The hook comprises a horizontal portion and an upper folding portion, the horizontal portion and the upper folding portion are an integrated structure, and the horizontal portion and the upper folding portion are an L-shaped structure.

[0012] When the metal hanging rope hook on the auxiliary heating container is hung on the hook, the height of the upper surface of the auxiliary heating container is set to be lower than the height of the lower surface of the pulverized coal burner.

[0013] The nozzles are arranged in plurality.

[0014] When the metal hanging rope on the auxiliary heating container is hung on the hook, the nozzle is arranged to be located directly above the auxiliary heating container.

[0015] The fuel is diesel, wood or waste cloth which are inflammable materials.

[0016] The technical solution of the utility model is adopted, and the working principle and beneficial effects are as follows:

[0017] The rotary kiln auxiliary heating device described in the utility model, when the structure is set, the rotary kiln is partially improved to form the rotary kiln auxiliary heating device. A nozzle is set at one end of the pulverized coal burner, and a hook is also set at the end of the pulverized coal burner where the nozzle is set. A metal hanging rope is set on the auxiliary heating container, and the metal hanging rope is hooked on the hook. The hook is welded to one end of the pulverized coal burner, so that on the one hand, the auxiliary heating container can be conveniently and quickly hooked and taken away, and on the other hand, the auxiliary heating container is in a specific position after being hooked, that is, located directly below the nozzle. By hooking the metal hanging rope on the hook, the position arrangement of the auxiliary heating container can be conveniently and reliably realized. The hook is used to hang the auxiliary heating container; the auxiliary heating container is made of high temperature resistant material. When the rotary kiln is auxiliary heated, flammables (flammable materials) are added into the auxiliary heating container; after the maintenance of the rotary kiln is completed, the completed auxiliary heating container is hooked on the hook by the metal hanging rope, so that the auxiliary heating container is located directly below the nozzle. After the ignition conditions are met, before the pulverized coal burner is ignited, a long pole is used to extend through the observation hole of the rotary kiln to ignite the flammable materials in the auxiliary heating container to perform auxiliary heating. After a period of auxiliary heating, the rotary kiln is normally started and ignited. The temperature of the outlet area of ​​the pulverized coal burner is increased by the combustion of the flammable materials in the auxiliary heating container, and the open flame directly contacts the pulverized coal and diesel sprayed in the burner, which quickly ignites the pulverized coal and shortens the heating time. Using the device of the utility model: the heating time of the rotary kiln is reduced from more than 8 hours to 3 to 4 hours, and it can overcome the undesirable conditions such as high moisture content of pulverized coal, many diesel impurities, and excessive pulverized coal spraying, reduce heating failures, and reduce labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a structural schematic diagram of the auxiliary heating device of the rotary kiln described in the utility model;

[0020] Figure 2 It is a partial cross-sectional structural schematic diagram of the rotary kiln auxiliary heating device of the utility model;

[0021] The marks in the attached drawings are: 1. pulverized coal burner; 2. nozzle; 3. hook; 4. auxiliary heating container; 5. metal hanging rope; 6. horizontal part; 7. upper folding part. DETAILED DESCRIPTION

[0022] The following is a detailed description of the embodiments of the present invention, such as the shapes, structures, positions and connection relationships of the components involved, the functions and working principles of the components, etc., by referring to the accompanying drawings:

[0023] As attached Figure 1 , Attachment Figure 2 As shown, the utility model is a rotary kiln auxiliary heating device, the rotary kiln pelletizer includes a pulverized coal burner 1, a nozzle 2 is arranged at one end of the pulverized coal burner 1, a hook 3 is also arranged at the end of the pulverized coal burner 1 where the nozzle 2 is arranged, a metal hanging rope 5 is arranged on the auxiliary heating container 4, and the metal hanging rope 5 is hooked on the hook 3. The above structure proposes an improved technical solution for the deficiencies in the prior art. When the structure is set, the rotary kiln is partially improved to form a rotary kiln auxiliary heating device. A nozzle 2 is arranged at one end of the pulverized coal burner 1, a hook 3 is also arranged at the end of the pulverized coal burner 1 where the nozzle 2 is arranged, a metal hanging rope 5 is arranged on the auxiliary heating container 4, and the metal hanging rope 5 is hooked on the hook 3. The hook is welded to one end of the pulverized coal burner 1, so that, on the one hand, the auxiliary heating container 4 can be conveniently and quickly hooked and taken away, and on the other hand, the auxiliary heating container 4 is in a specific position after being hooked, that is, located directly below the nozzle. By hooking the metal hanging rope on the hook, the position arrangement of the auxiliary heating container 4 can be conveniently and reliably realized. The hook is used to hang the auxiliary heating container 4; and the auxiliary heating container 4 is made of high temperature resistant materials. When the rotary kiln is auxiliary heated, flammable substances (flammable materials) are added to the auxiliary heating container 4; after the maintenance of the rotary kiln is completed, the completed auxiliary heating container 4 is hung on the hook 3 through the metal hanging rope 5, so that the auxiliary heating container 4 is located directly below the nozzle 2. After the ignition conditions are met, before the pulverized coal burner 1 is ignited, a long pole is inserted from the observation hole of the rotary kiln to ignite the flammable substances in the auxiliary heating container 4 for auxiliary heating. After a period of auxiliary heating, the rotary kiln is normally started and ignited. The above structure increases the temperature of the outlet area of ​​the pulverized coal burner through the combustion of the flammable substances in the auxiliary heating container 4, and the open flame directly contacts the pulverized coal and diesel sprayed in the burner, quickly ignites the pulverized coal, and shortens the heating time. The device of the utility model can reduce the heating time of the rotary kiln from more than 8 hours to 3-4 hours, and can overcome the unfavorable conditions such as high moisture content of pulverized coal, many diesel impurities, and excessive pulverized coal injection, reduce heating failures, and reduce labor intensity. The auxiliary heating device of the rotary kiln described in the utility model has a simple structure, can conveniently and quickly increase the heating speed of the pulverized coal burner, prevent flameout, reduce heating time and heating costs, and improve pellet production efficiency.

[0024] A fuel adding port is arranged on the upper part of the auxiliary heating container 4. The above structure and the arrangement of the fuel adding port facilitate the addition of combustibles for combustion into the auxiliary heating container 4 in advance.

[0025] The pulverized coal burner 1 is located inside the rotary kiln. In the above structure, the pulverized coal burner 1 is located inside the rotary kiln, and the auxiliary heating container 4 is hooked on the hook when the rotary kiln is inspected and repaired.

[0026] The rotary kiln auxiliary heating device also includes an ignition long rod. The above structure and the setting of the ignition long rod facilitate the remote ignition of combustibles. After the ignition conditions are met, before the pulverized coal burner 1 is ignited, the long rod is inserted from the rotary kiln observation hole to ignite the combustibles in the auxiliary heating container 4 to perform auxiliary heating. After a period of auxiliary heating, the machine is normally started and ignited.

[0027] The auxiliary heating container 4 is made of a high temperature resistant metal material. In the above structure, since the combustibles in the auxiliary heating container 4 need to burn for a period of time, the auxiliary heating container 4 needs to have a high temperature resistance function. In this way, the auxiliary heating needs can be effectively met.

[0028] The hook 3 comprises a horizontal portion 6 and an upper folding portion 7, which are an integrated structure and an L-shaped structure. In the above structure, the hook is welded at one end of the pulverized coal burner 1, which is convenient for hooking the metal hanging rope, and the auxiliary heating container 4 is hooked reliably.

[0029] When the metal hanging rope 5 on the auxiliary heating container 4 is hooked on the hook 3, the height of the upper surface of the auxiliary heating container 4 is set to be lower than the height of the lower surface of the pulverized coal burner 1. With the above structure, when the combustibles in the auxiliary heating container 4 are burned, the area near the nozzle can be reliably heated. In this way, the temperature of the outlet area of ​​the pulverized coal burner can be increased, and the open flame can directly contact the pulverized coal and diesel sprayed in the burner, quickly ignite the pulverized coal, and shorten the heating time.

[0030] The nozzles 2 are provided in plurality. When the metal hanging rope 5 on the auxiliary heating container 4 is hooked on the hook 3 , the nozzle 2 is provided to be located directly above the auxiliary heating container 4 .

[0031] The fuel is diesel, wood or waste cloth, which are flammable materials. In the above structure, the fuel is diesel, wood or waste cloth, which are flammable materials, so it is easy to ignite and heat quickly.

[0032] The rotary kiln auxiliary heating device described in the utility model, when the structure is set, the local structure of the rotary kiln is improved, so as to form the rotary kiln auxiliary heating device. A nozzle 2 is arranged at one end of the pulverized coal burner 1, and a hook 3 is also arranged at the end of the pulverized coal burner 1 where the nozzle 2 is arranged. A metal hanging rope 5 is arranged on the auxiliary heating container 4, and the metal hanging rope 5 is hooked on the hook 3. The hook is welded to one end of the pulverized coal burner 1, so that, on the one hand, the auxiliary heating container 4 can be conveniently and quickly hooked and taken away, and on the other hand, the auxiliary heating container 4 is in a specific position after being hooked, that is, it is located directly below the nozzle. By hooking the metal hanging rope on the hook, the position arrangement of the auxiliary heating container 4 can be conveniently and reliably realized. The hook is used to hang the auxiliary heating container 4; and the auxiliary heating container 4 is made of high temperature resistant material. When the rotary kiln is auxiliary heated, flammables (combustible materials) are added into the auxiliary heated container 4; after the maintenance of the rotary kiln is completed, the completed auxiliary heated container 4 is hung on the hook 3 through the metal hanging rope 5, so that the auxiliary heated container 4 is located directly below the nozzle 2. After the ignition conditions are met, before the pulverized coal burner 1 is ignited, a long pole is inserted from the observation hole of the rotary kiln to ignite the flammables in the auxiliary heated container 4, and auxiliary heated. After a period of auxiliary heated, the rotary kiln is normally started and ignited. The above structure increases the temperature of the outlet area of ​​the pulverized coal burner through the combustion of the flammables in the auxiliary heated container 4, and the open flame directly contacts the pulverized coal and diesel sprayed in the burner, quickly ignites the pulverized coal, and shortens the heating time. Using the device of the utility model, the heating time of the rotary kiln is reduced from more than 8 hours to 3-4 hours, and it can overcome the unfavorable conditions such as high moisture content of pulverized coal, many impurities in diesel, and excessive pulverized coal spraying, reduce heating failures, and reduce labor intensity.

[0033] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A rotary kiln auxiliary heating device, characterized in that: The rotary kiln pelletizer comprises a pulverized coal burner (1), a nozzle (2) is arranged at one end of the pulverized coal burner (1), a hook (3) is also arranged at the end of the pulverized coal burner (1) where the nozzle (2) is arranged, a metal hanging rope (5) is arranged on the auxiliary heating container (4), and the metal hanging rope (5) is hooked on the hook (3).

2. The rotary kiln auxiliary heating device according to claim 1, characterized in that: A fuel adding port is arranged on the upper portion of the auxiliary heating container (4).

3. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: The pulverized coal burner (1) is located inside the rotary kiln.

4. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: The rotary kiln auxiliary heating device also includes an ignition long rod.

5. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: The auxiliary heating container (4) is a structure made of high-temperature resistant metal material.

6. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: The hook (3) comprises a horizontal portion (6) and an upper folding portion (7); the horizontal portion (6) and the upper folding portion (7) are an integrated structure; and the horizontal portion (6) and the upper folding portion (7) are an L-shaped structure.

7. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: When the metal hanging rope (5) on the auxiliary heating container (4) is hooked on the hook (3), the height of the upper surface of the auxiliary heating container (4) is set to be lower than the height of the lower surface of the pulverized coal burner (1).

8. The rotary kiln auxiliary heating device according to claim 1 or 2, characterized in that: A plurality of nozzles (2) are provided.

9. The rotary kiln auxiliary heating device according to claim 7, characterized in that: When the metal hanging rope (5) on the auxiliary heating container (4) is hooked on the hook (3), the nozzle (2) is arranged to be located directly above the auxiliary heating container (4).

10. The rotary kiln auxiliary heating device according to claim 2, characterized in that: The fuel is diesel or wood or waste cloth which are flammable materials.

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