Efficient residual coal returning device and working method

Abstract

This invention provides a high-efficiency surplus coal recovery device and its operating method. The device includes a sealing guide sleeve, an upper hopper, a lifting mechanism, a leveling rod, a lower gate plate of the surplus coal hopper, and the surplus coal hopper itself. The lifting mechanism has a first inlet below and a first outlet above; the surplus coal hopper has a second outlet below and a second inlet above; the first inlet and second outlet are connected, and the lower gate plate of the surplus coal hopper is located at the second outlet; the upper hopper has a third inlet above and a third outlet below; one side of the sealing guide sleeve has a fourth inlet and a fourth outlet; the other side of the sealing guide sleeve has a fifth outlet; one side of the leveling rod is inserted into the sealing guide sleeve. This invention can reduce the impact of heavy-load start-up on the lifting mechanism, improving working efficiency and service life.

Description

Technical Field

[0001] This invention relates to the field of metallurgical coking technology, and more particularly to a high-efficiency residual coal recovery device and its working method. Background Technology

[0002] In the top-charged coke oven process, after the coal charging car loads coal into the carbonization chamber, the coal powder in the carbonization chamber will form a coal peak when it accumulates to the top. This requires the coke pusher's coal leveling device to level the coal peak in the carbonization chamber, which is called coal leveling. During coal leveling, the coal leveling rod of the coke pusher will bring out a certain amount of coal powder from the carbonization chamber when it moves backward. The coke pusher will have a residual coal hopper set below the coal leveling device to collect the coal powder that is brought out. In order to return the coal powder in the residual coal hopper to the carbonization chamber, the coal leveling device is usually equipped with a ring scraper to lift the coal powder in the residual coal hopper to a high position. When the coal leveling rod moves forward and re-enters the carbonization chamber, the coal leveling rod will push the coal powder back into the carbonization chamber.

[0003] During coal leveling, the leveling rod repeatedly moves in and out of the carbonization chamber via a drive mechanism. Multiple transverse baffles are installed along the middle of the leveling rod, and the coal peaks within the carbonization chamber are eventually leveled by the repeated movement of these baffles. When the leveling rod retracts from the carbonization chamber, the annular scraper conveyor is not operating. The coal dust in the carbonization chamber is in a stacked state and has a higher density, so it is carried out of the carbonization chamber by the retracting leveling rod, resulting in a large amount of coal dust being carried out. When the leveling rod moves forward, the annular scraper conveyor starts operating. The coal dust in the surplus coal hopper is lifted to a high position by the annular scraper conveyor and falls into the sealing sleeve. The leveling rod then carries the coal dust from the sealing sleeve into the carbonization chamber. The coal dust lifted by the annular scraper conveyor is in a loose state and has a lower density, so a small amount of coal dust is returned to the carbonization chamber. This leads to an increasing amount of coal dust in the surplus coal hopper, increasing the load on the annular scraper conveyor, eventually causing it to malfunction or even break down, thus preventing the surplus coal return function from being realized.

[0004] Sometimes, in order to force the residual coal return function, it is necessary to intervene in the amount of coal loaded in the carbonization chamber, so that the amount of coal loaded into the carbonization chamber is less on the coke pusher side. Then, multiple short-stroke operation of the coal leveling rod is used to repeatedly send the coal powder in the residual coal hopper into the carbonization chamber. This is inefficient and affects the normal operation of the coke oven.

[0005] Moreover, the operation of the annular scraper is affected by the running direction of the coal leveling rod. When the coal leveling rod moves backward, the annular scraper does not work, and when the coal leveling rod moves forward, the annular scraper starts working again. On the one hand, the actual cumulative working time of the annular scraper is short and the working efficiency is low. On the other hand, the frequent intermittent operation affects the service life of the equipment.

[0006] Currently, in order to prevent the failure of the residual coal recovery device from affecting the normal use of the coke pusher, an emergency scraper and storage hopper structure is added below the annular scraper. The emergency scraper and storage hopper are emergency structures and cannot solve the problem of the traditional residual coal return function. In addition, they also bring on-site handling, material collection management and environmental protection issues. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a high-efficiency surplus coal return device and its operating method. This invention utilizes upper and lower gates and an upper hopper, allowing the lifting mechanism to operate without being restricted by the coal leveling rod, thus changing the operating process of the lifting mechanism, improving work efficiency, and enabling the lifting mechanism to start under no-load conditions, thereby extending the equipment's service life.

[0008] The technical means employed in this invention are as follows:

[0009] A high-efficiency surplus coal recovery device includes: a sealing guide sleeve, an upper hopper, a lifting mechanism, a coal leveling rod, a lower gate of the surplus coal hopper, and the surplus coal hopper itself. The lifting mechanism has a first inlet below and a first outlet above. The surplus coal hopper has a second outlet below and a second inlet above. The first inlet is connected to the second outlet, and the lower gate of the surplus coal hopper is located at the second outlet, between the second outlet and the first inlet.

[0010] The upper hopper is provided with a third inlet at the top and a third outlet at the bottom; the sealing guide sleeve is provided with a fourth inlet and a fourth outlet that communicate with the interior on one side. The third inlet is connected to the first outlet, the third outlet is connected to the fourth inlet, and the fourth outlet is located above the second inlet.

[0011] The other side of the sealing guide sleeve advances into the carbonization chamber during coal leveling and docks with the carbonization chamber. The other side of the sealing guide sleeve docking with the carbonization chamber is provided with a fifth discharge port. After coal leveling is completed, the sealing guide sleeve retracts to its original position and no longer contacts the carbonization chamber. One side of the coal leveling rod is inserted into the sealing guide sleeve and can be inserted into the carbonization chamber through the fifth discharge port. The coal leveling rod is located between the upper hopper and the residual coal hopper, and the upper hopper is located above the residual coal hopper.

[0012] Furthermore, an upper hopper gate is provided at the third discharge port, and the upper hopper gate is located between the third discharge port and the fourth inlet port.

[0013] Furthermore, the upper hopper gate is located directly above the fourth feed inlet.

[0014] Furthermore, the third inlet is located directly below the first outlet.

[0015] Furthermore, the sealing guide sleeve is arranged laterally and has a transverse cavity inside, in which the coal leveling rod moves laterally back and forth.

[0016] Furthermore, the lifting mechanism is a ring scraper conveyor or a bucket elevator.

[0017] The present invention also provides a method for operating a high-efficiency surplus coal return device, comprising the following steps:

[0018] The lifting mechanism operates based on the coal powder capacity in the surplus coal hopper and the upper hopper. When the upper hopper is not full of coal powder and there is coal powder in the surplus coal hopper, the lifting mechanism starts under no-load. Then, the lower gate of the surplus coal hopper opens, and the coal powder in the surplus coal hopper falls into the lifting mechanism. The lifting mechanism lifts the falling coal powder into the upper hopper, and the upper hopper gate remains closed. When the upper hopper is full or the surplus coal hopper is empty, the lower gate of the surplus coal hopper closes, and then the lifting mechanism stops working.

[0019] When the coal leveling device is leveling coal, the leveling rod moves forward, and the upper hopper gate opens in advance, causing a large amount of coal dust to fall into the sealed guide sleeve. Then, the leveling rod carries the coal dust into the carbonization chamber. When the leveling rod moves backward, it carries the coal dust out of the carbonization chamber and it falls into the surplus coal hopper along the chute at the rear of the sealed guide sleeve. The lower gate of the surplus coal hopper closes, so that the lifting mechanism is not subjected to coal dust pressure and the load is reduced.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention adds a gate plate at the connection between the lower part of the coal hopper and the hoisting mechanism, so that the hoisting mechanism is always in an unloaded state. When it is necessary to hoist the coal powder, the hoisting mechanism is started first, and then the gate plate is opened to allow the coal powder in the coal hopper to fall into the hoisting mechanism. This setting can reduce the impact of heavy load start-up on the hoisting mechanism and is beneficial to the service life of the hoisting mechanism.

[0022] 2. This invention utilizes an upper hopper with a gate to pre-lift coal powder from the surplus coal hopper for storage. When the leveling rod advances, the hopper gate is opened in advance to quickly unload the coal powder from the upper hopper into the sealed guide sleeve, which is then pushed into the carbonization chamber by the leveling rod. This design changes the operating process of the lifting mechanism, allowing it to operate independently of the leveling rod's working state, based on the amount of coal powder in the surplus coal hopper and the hopper, thereby improving the efficiency of the lifting mechanism and increasing the amount of coal powder returned.

[0023] 3. This invention eliminates the emergency scraper conveyor and storage hopper structure, reducing equipment manufacturing costs and also reducing the environmental pollution caused by smoke and dust generated during material unloading from the storage hopper, which is beneficial to environmental protection.

[0024] Based on the above reasons, this invention can be widely promoted in fields such as top-charging coal process coke oven machinery. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a front view of the efficient surplus coal return device of the present invention.

[0027] Figure 2 This is a side view of the efficient residual coal return device of the present invention.

[0028] In the diagram: 1. Powdered coal in the carbonization chamber; 2. Carbonization chamber; 3. Sealing guide sleeve; 4. Upper hopper; 5. Lifting mechanism; 6. Upper hopper gate; 7. Coal leveling rod; 8. Lower gate of the surplus coal hopper; 9. Surplus coal hopper. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0033] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0034] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0036] This invention provides a high-efficiency residual coal return device. By adding key structures and modifying the operating process of the residual coal return device, a highly efficient residual coal return device is developed and designed. This reduces the load on the annular scraper conveyor, extends the equipment's service life, and increases the amount of residual coal returned, improving efficiency, reducing equipment failure rate, and increasing overall equipment reliability. It also ensures the automated operation of the entire coke oven process. Using this high-efficiency residual coal return device eliminates the need for an emergency scraper conveyor and emergency storage hopper structure, which is beneficial for optimizing equipment costs. This invention can be applied to the coke pusher car in the top-charging coal process.

[0037] The present invention provides a lifting mechanism 5 (which may be a ring scraper conveyor or a bucket elevator or similar mechanism) below the coal hopper 9 of the coal leveling device. A controllable gate is added between the coal hopper 9 and the lifting mechanism 5, namely the lower gate 8 of the coal hopper. A hopper is added above the lifting mechanism 5, namely the upper hopper 4. A controllable gate is then set below the discharge port of the upper hopper 4, namely the upper hopper gate 6. The discharge port of the upper hopper 4 is directly opposite the sealing guide sleeve 3.

[0038] Specifically, the high-efficiency surplus coal recovery device of the present invention includes a sealing guide sleeve 3, an upper hopper 4, a lifting mechanism 5, an upper hopper gate 6, a coal leveling rod 7, a lower gate 8 for the surplus coal hopper, and a surplus coal hopper 9. The lifting mechanism 5 has a first inlet below and a first outlet above; the surplus coal hopper 9 has a second outlet below and a second inlet above; the first inlet is connected to the second outlet, and the lower gate 8 for the surplus coal hopper is located at the second outlet, between the second outlet and the first inlet; the upper hopper 4 has a third inlet above and a third outlet below; the sealing guide sleeve 3 has a fourth inlet and a fourth outlet communicating with its interior on one side, the third inlet being connected to the first outlet... The discharge port is connected to the fourth inlet, which is located above the second inlet. The other side of the sealing guide sleeve 3 advances to the carbonization chamber 2 during coal leveling and docks with it. A fifth discharge port is located on the other side of the sealing guide sleeve 3 that docks with the carbonization chamber 2. After coal leveling, the sealing guide sleeve 3 retracts to its original position and no longer contacts the carbonization chamber 2. One side of the coal leveling rod 7 is inserted into the sealing guide sleeve 3 and can be inserted into the carbonization chamber 2 through the fifth discharge port. The coal leveling rod 7 is located between the upper hopper 4 and the residual coal hopper 9, with the upper hopper 4 located above the residual coal hopper 9. An upper hopper gate 6 is located at the third discharge port, between the third discharge port and the fourth inlet. The upper hopper gate 6 is directly above the fourth inlet. The third inlet is directly below the first discharge port. The sealing guide sleeve 3 is horizontally arranged and has an internal horizontal cavity, within which the coal leveling rod 7 moves laterally back and forth.

[0039] This invention changes the internal operating process of the surplus coal return device. The lifting mechanism 5 operates according to the coal powder capacity in the surplus coal hopper 9 and the upper hopper 4. When the upper hopper 4 is not full of coal powder and there is coal powder in the surplus coal hopper 9, the lifting mechanism 5 starts under no-load. Then, the lower gate 8 of the surplus coal hopper opens, and the coal powder in the surplus coal hopper 9 falls into the lifting mechanism 5. The lifting mechanism 5 lifts the falling coal powder into the upper hopper 4, and the upper hopper gate 6 remains closed. When the upper hopper 4 is full or the surplus coal hopper 9 is empty, the lower gate 8 of the surplus coal hopper closes, and then the lifting mechanism 5 stops working.

[0040] When the coal leveling device is leveling coal, the leveling rod 7 moves forward, and the upper hopper gate 6 opens in advance, causing a large amount of coal powder to fall into the sealing guide sleeve 3, and then be carried into the carbonization chamber 2 by the leveling rod 7. When the leveling rod 7 moves backward, it carries out the coal powder 1 from the carbonization chamber, which falls into the surplus coal hopper 9 along the chute at the rear of the sealing guide sleeve 3. The lower gate (lower gate 8 of the surplus coal hopper) in the surplus coal hopper 9 closes, so that the lifting mechanism 5 is not subjected to coal powder pressure and the load is reduced.

[0041] The high-efficiency surplus coal return device utilizes newly installed upper and lower gates and upper hopper 4, allowing the lifting mechanism 5 to operate without being restricted by the coal leveling rod 7. This changes the operating process of the lifting mechanism 5, improves working efficiency, and allows the lifting mechanism 5 to start under no-load conditions, thus extending the service life of the equipment.

[0042] In existing surplus coal return devices, when the leveling rod retracts from the carbonization chamber, the annular scraper conveyor does not operate. The coal dust inside the carbonization chamber is carried out by the retracting leveling rod, resulting in a large amount of coal dust being carried out. When the leveling rod advances, the annular scraper conveyor starts operating. During this advance, the coal dust in the surplus coal hopper is lifted to a high position by the annular scraper conveyor and falls into the sealing sleeve. The leveling rod then carries the coal dust from the sealing sleeve into the carbonization chamber. The coal dust lifted by the annular scraper conveyor is loose and has a low density, resulting in a small amount of coal dust being returned to the carbonization chamber. This leads to an increasing amount of coal dust in the surplus coal hopper, placing an increasingly heavy load on the annular scraper conveyor. Ultimately, the annular scraper conveyor may fail to operate or even be damaged, rendering the surplus coal return function impossible. Furthermore, the annular scraper conveyor cannot operate continuously; its actual cumulative working time is short, and its working efficiency is low. On the other hand, frequent intermittent operation affects the equipment's service life.

[0043] Compared to existing surplus coal return devices, this invention adds an upper hopper and an upper gate plate, which act as a buffer for material replenishment. As the leveling rod advances, a large amount of coal powder in the upper hopper can fall into the sealed guide sleeve, increasing the surplus coal return volume. The lifting mechanisms, such as the annular scraper conveyor, can operate for longer periods without being limited by the working direction of the leveling rod, thus improving the efficiency of the surplus coal return device. The lower gate plate in this invention reduces the starting resistance of the lifting mechanisms, such as the annular scraper conveyor, reducing the frequency of damage and extending their service life.

[0044] This invention can be applied to the 7-meter coke pusher of Shuigang Steel and other coke pusher products for subsequent top-charged coal and coke oven processes.

[0045] The application of this high-efficiency residual coal recovery device can reduce users' maintenance costs and improve the residual coal recovery efficiency of the equipment. This invention is the first to be applied to a coke pusher. The technology features simple structure, reliability, high efficiency, and durability, improving the overall efficiency and automation of the coke oven equipment, and enhancing the market competitiveness and economic benefits of the group company's products.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for operating a high-efficiency surplus coal return device, characterized in that, The high-efficiency surplus coal return device includes: a sealing guide sleeve (3), an upper hopper (4), a lifting mechanism (5), a coal leveling rod (7), a lower gate plate (8) for the surplus coal hopper, and a surplus coal hopper (9). The lifting mechanism (5) has a first inlet below and a first outlet above. The surplus coal hopper (9) has a second outlet below and a second inlet above. The first inlet is connected to the second outlet. The lower gate plate (8) for the surplus coal hopper is located at the second outlet and is situated between the second outlet and the first inlet. The upper hopper (4) is provided with a third inlet at the top and a third outlet at the bottom; the sealing guide sleeve (3) is provided with a fourth inlet and a fourth outlet that are connected to the interior on one side. The third inlet is connected to the first outlet, the third outlet is connected to the fourth inlet, and the fourth outlet is located above the second inlet. The other side of the sealing guide sleeve (3) advances to the carbonization chamber (2) during coal leveling and docks with the carbonization chamber (2). The other side of the sealing guide sleeve (3) docking with the carbonization chamber (2) is provided with a fifth discharge port. After coal leveling is completed, the sealing guide sleeve (3) retracts to its original position and does not contact the carbonization chamber (2). One side of the coal leveling rod (7) is inserted into the sealing guide sleeve (3) and can be inserted into the carbonization chamber (2) through the fifth discharge port. The coal leveling rod (7) is located between the upper hopper (4) and the residual coal hopper (9). The upper hopper (4) is located above the residual coal hopper (9). The third discharge port is provided with an upper hopper gate (6), which is located between the third discharge port and the fourth inlet port; The upper hopper gate (6) is located directly above the fourth feed inlet. The third inlet is located directly below the first outlet; The operating method of the high-efficiency surplus coal return device includes the following steps: The lifting mechanism (5) operates according to the coal powder capacity in the surplus coal hopper (9) and the upper hopper (4). When the upper hopper (4) is not full of coal powder and there is coal powder in the surplus coal hopper (9), the lifting mechanism (5) starts without load. Then the lower gate (8) of the surplus coal hopper opens, and the coal powder in the surplus coal hopper (9) falls into the lifting mechanism (5). The lifting mechanism (5) lifts the falling coal powder into the upper hopper (4). The upper hopper gate (6) remains closed. When the upper hopper (4) is full or the surplus coal hopper (9) is empty, the lower gate (8) of the surplus coal hopper is closed, and then the lifting mechanism (5) stops working. When the coal leveling device is leveling coal, the leveling rod (7) moves forward and the upper hopper gate (6) opens in advance, and a large amount of coal powder will fall into the sealing guide sleeve (3), and then be carried into the carbonization chamber (2) by the leveling rod (7); when the leveling rod (7) moves backward, it carries out the coal powder (1) in the carbonization chamber and falls into the surplus coal hopper (9) along the chute at the rear of the sealing guide sleeve (3). The lower gate (8) of the surplus coal hopper closes, so that the lifting mechanism (5) is free from the pressure of coal powder and the load is reduced. A lower gate plate (8) is added at the connection between the lower part of the coal hopper (9) and the hoisting mechanism (5) to keep the hoisting mechanism (5) always in an unloaded state. When it is necessary to hoist the coal powder, the hoisting mechanism (5) is started first, and then the lower gate plate (8) of the coal hopper is opened so that the coal powder in the coal hopper (9) falls into the hoisting mechanism (5) to reduce the impact of heavy load start-up on the hoisting mechanism (5) and to extend the service life of the hoisting mechanism (5). Using the upper hopper (4) with the upper hopper gate (6), the coal powder in the surplus coal hopper (9) is lifted up in advance for storage. When the leveling rod (7) moves forward, the upper hopper gate (6) is opened in advance, and the coal powder in the upper hopper (4) is quickly unloaded into the sealing guide sleeve (3) and pushed into the carbonization chamber (2) by the leveling rod (7). This changes the operation process of the lifting mechanism (5), so that the lifting mechanism (5) is not limited by the working state of the leveling rod (7) and works according to the amount of coal powder in the surplus coal hopper (9) and the upper hopper (4), thereby improving the working efficiency of the lifting mechanism (5) and increasing the amount of coal powder returned.

2. The working method of the high-efficiency surplus coal return device according to claim 1, characterized in that, The sealing guide sleeve (3) is arranged horizontally and has a horizontal cavity inside. The coal leveling rod (7) moves horizontally back and forth in the horizontal cavity.

3. The working method of the high-efficiency surplus coal return device according to claim 1, characterized in that, The lifting mechanism (5) is a ring scraper conveyor or a bucket elevator.

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