Efficient residual coal returning device and working method

Abstract

The invention provides an efficient residual coal returning device and a working method. The device comprises a sealing guide sleeve, an upper hopper, a lifting mechanism, a coal leveling rod, a residual coal hopper lower flashboard and a residual coal hopper, a first feeding port is formed below the lifting mechanism, and a first discharging port is formed above the lifting mechanism; a second discharging hole is formed below the residual coal hopper, and a second feeding hole is formed above the residual coal hopper; the first feed port is connected with the second discharge port, and a residual coal hopper lower flashboard is arranged at the second discharge port; a third material inlet is formed above the upper hopper, and a third material outlet is formed below the upper hopper; a fourth feeding hole and a fourth discharging hole are formed in one side of the sealing guide sleeve; a fifth discharging opening is formed in the other side of the sealing guide sleeve, and one side of the coal leveling rod is inserted into the sealing guide sleeve. The lifting mechanism can be prevented from being impacted by heavy load starting, the working efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical coking, and in particular to a high-efficiency excess coal returning device and a working method. Background Art

[0002] In the top-loading coal coke oven process, after the coal loading 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 coal leveling device of the coke pushing car to level the coal peak in the carbonization chamber, which is referred to as coal leveling. When leveling the coal, the coal leveling rod of the coke pushing car will bring out a certain amount of coal powder in the carbonization chamber when it retreats. A residual coal hopper will be set under the coal leveling device on the coke pushing car to collect the coal powder brought out. In order to be able 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 place. When the coal leveling rod moves forward and enters the carbonization chamber again, the coal leveling rod pushes the coal powder back into the carbonization chamber.

[0003] When leveling coal, the coal rod is driven by the driving mechanism to repeatedly enter and exit the carbonization chamber. There are multiple horizontal partitions in the middle of the coal rod. The coal peak in the carbonization chamber is repeatedly moved by the partition in the middle of the coal rod and is finally leveled. When the coal rod retreats from the carbonization chamber, the annular scraper does not work. The coal powder in the carbonization chamber is in a stacked state and has a large density. It is carried out of the carbonization chamber by the retreat of the coal rod, and the amount of coal powder carried out is large; when the coal rod moves forward, the annular scraper starts to work. The coal powder in the residual coal hopper is driven by the annular scraper to be lifted to a high place and falls into the sealing sleeve. The coal rod brings the coal powder in the sealing sleeve into the carbonization chamber. The coal powder lifted by the annular scraper is in a loose state and has a low density. The amount of coal powder returned to the carbonization chamber is small. This results in more and more coal powder in the residual coal hopper, and the load of the annular scraper becomes larger and larger. Eventually, the annular scraper cannot work, and even the annular scraper will be damaged, resulting in the inability to realize the residual coal return function.

[0004] Sometimes, in order to force the return of residual coal, it is necessary to intervene in the coal loading in the carbonization chamber, forcing the amount of coal loaded into the carbonization chamber to be small on the coke pusher side, and then use multiple short-stroke operations of the flat coal rod to repeatedly send the coal powder in the residual coal hopper into the carbonization chamber, which 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 flat coal rod. When the flat coal rod moves backward, the annular scraper does not work. When the flat coal 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, frequent intermittent work affects the service life of the equipment.

[0006] At present, in order to prevent the failure of the residual coal recovery device from affecting the normal use of the coke pushing car, an emergency scraper and a storage hopper structure are added under the ring scraper. The emergency scraper and storage hopper are emergency structures, which cannot solve the defects of the traditional residual coal return function, and also bring about on-site processing of falling material collection management and environmental protection problems. Summary of the invention

[0007] According to the technical problems raised above, an efficient excess coal return device and working method are provided. The present invention utilizes upper and lower gate plates and an upper hopper to enable the lifting mechanism to work without being restricted by the flat coal rod, thus changing the operation process of the lifting mechanism and improving the working efficiency. In addition, the lifting mechanism can be started without load, thus increasing the service life of the equipment.

[0008] The technical means adopted by the present invention are as follows:

[0009] A high-efficiency excess coal return device comprises: a sealing guide sleeve, an upper hopper, a lifting mechanism, a flat coal rod, a lower gate plate of the excess coal hopper and the excess coal hopper, wherein a first feed inlet is provided below the lifting mechanism and a first discharge port is provided above the lifting mechanism; a second discharge port is provided below the excess coal hopper and a second feed inlet is provided above the excess coal hopper; the first feed inlet is connected to the second discharge port, the lower gate plate of the excess coal hopper is provided at the second discharge port, and the lower gate plate of the excess coal hopper is located between the second discharge port and the first feed inlet;

[0010] The upper part of the upper hopper is provided with a third feed inlet above and a third feed outlet below; a fourth feed inlet and a fourth feed outlet connected to the inside are provided on one side of the sealing guide sleeve, the third feed inlet is connected to the first feed outlet, the third feed outlet is connected to the fourth feed inlet, and the fourth feed outlet is located above the second feed inlet;

[0011] The other side of the sealing guide sleeve advances to the carbonization chamber when leveling the coal and docks with the carbonization chamber, and a fifth discharge port is provided on the other side of the sealing guide sleeve that docks with the carbonization chamber. After leveling the coal, the sealing guide sleeve retreats to its original position and has no contact with 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 feed port.

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

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

[0015] Furthermore, the sealing guide sleeve is arranged transversely and has a transverse cavity inside, and the flat coal rod performs transverse reciprocating movement in the transverse cavity.

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

[0017] The present invention also provides a working method of a high-efficiency excess coal return device, comprising the following steps:

[0018] The lifting mechanism works according to the capacity of the pulverized coal in the remaining coal hopper and the upper hopper. When the upper hopper is not full of pulverized coal and there is pulverized coal in the remaining coal hopper, the lifting mechanism starts without load, then the lower gate of the remaining coal hopper opens, and the pulverized coal in the remaining coal hopper falls into the lifting mechanism. The lifting mechanism lifts the fallen pulverized coal into the upper hopper, and the gate of the upper hopper remains closed. When the upper hopper is full or the remaining coal hopper is empty, the lower gate of the remaining coal hopper is closed, and then the lifting mechanism stops working.

[0019] When the coal leveling device is leveling coal, the coal leveling rod moves forward and the gate of the upper hopper opens in advance, and a large amount of coal powder will fall into the sealing guide sleeve, and then be brought into the carbonization chamber by the coal leveling rod; when the coal leveling rod moves backward, the coal powder in the carbonization chamber is brought out and falls into the residual coal hopper along the chute at the rear of the sealing guide sleeve, and the lower gate of the residual coal hopper is closed, so that the lifting mechanism is free from the pressure of coal powder 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 residual coal hopper and the lifting mechanism, so that the lifting mechanism always remains in an unloaded state. When the coal powder needs to be lifted, the lifting mechanism is started first, and then the gate plate is opened to allow the coal powder in the residual coal hopper to fall into the lifting mechanism. This setting can reduce the impact of the lifting mechanism from heavy-load startup, which is beneficial to the service life of the lifting mechanism.

[0022] 2. The present invention utilizes an upper hopper with a gate to lift the coal powder in the remaining coal hopper in advance and contain it. When the flat coal rod moves forward, the hopper gate is opened in advance to quickly unload the coal powder in the upper hopper into a sealing guide sleeve, which is then pushed into the carbonization chamber by the flat coal rod. This arrangement changes the operating process of the lifting mechanism, so that the lifting mechanism does not need to be restricted by the working state of the flat coal rod, and works according to the amount of coal powder in the remaining coal hopper and the hopper, thereby improving the working efficiency of the lifting mechanism and increasing the amount of coal powder returned.

[0023] 3. The present invention eliminates the emergency scraper and storage hopper structure, reduces the equipment manufacturing cost, and also reduces the pollution of the environment caused by smoke and dust generated when the storage hopper is unloading, which is beneficial to environmental protection.

[0024] Based on the above reasons, the present invention can be widely promoted in the fields of top-loading coal process coke oven machinery and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is the front view of the high-efficiency excess coal returning device of the present invention.

[0027] Figure 2 It is a side view of the high-efficiency excess coal returning device of the present invention.

[0028] In the figure: 1. Coal powder in carbonization chamber; 2. Carbonization chamber; 3. Sealing guide sleeve; 4. Upper hopper; 5. Lifting mechanism; 6. Upper hopper gate; 7. Flat coal rod; 8. Lower gate of residual coal hopper; 9. Residual coal hopper. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] The present invention provides a high-efficiency excess coal return device. By adding key structures and changing the operating process of the excess coal return device, a high-efficiency excess coal return device is developed and designed, which can reduce the load of the annular scraper, increase the service life of the equipment, and increase the excess coal return volume, improve efficiency, reduce the failure rate of the equipment, and increase the overall reliability of the equipment. The automated operation of the entire coke oven process is also guaranteed. The use of the high-efficiency excess coal return device of the present invention eliminates the need for an emergency scraper and an emergency storage hopper structure, which is beneficial to equipment cost optimization. The present invention can be applied to a coke pusher in a top-loading coal process.

[0037] The present invention arranges a lifting mechanism 5 (which may be a ring scraper or bucket elevator or other similar mechanisms) below the residual coal hopper 9 of the coal leveling device, and adds a controllable gate plate between the residual coal hopper 9 and the lifting mechanism 5, namely, the lower gate plate 8 of the residual coal hopper, and adds a hopper on the upper part of the lifting mechanism 5, namely, the upper hopper 4, and a controllable gate plate is further arranged below the discharge port of the upper hopper 4, namely, the upper hopper gate plate 6, and the discharge port of the upper hopper 4 is directly opposite to the sealing guide sleeve 3.

[0038] Specifically, the high-efficiency excess coal return device of the present invention comprises a sealing guide sleeve 3, an upper hopper 4, a lifting mechanism 5, an upper hopper gate plate 6, a flat coal rod 7, a excess coal hopper lower gate plate 8, and an excess coal hopper 9. A first feed port is provided below the lifting mechanism 5, and a first discharge port is provided above the lifting mechanism 5; a second discharge port is provided below the excess coal hopper 9, and a second feed port is provided above the excess coal hopper 9; the first feed port is connected to the second discharge port, and a excess coal hopper lower gate plate 8 is provided at the second discharge port, and the excess coal hopper lower gate plate 8 is located between the second discharge port and the first feed port; a third feed port is provided above the upper hopper 4, and a third discharge port is provided below the upper hopper 4; a fourth feed port and a fourth discharge port connected to the interior are provided on one side of the sealing guide sleeve 3 at the same time, and the third feed port is connected to the first discharge port, and the third The discharge port is connected to the fourth feed port, and the fourth discharge port is located above the second feed port; the other side of the sealing guide sleeve 3 advances to the carbonization chamber 2 when leveling coal, and docks with the carbonization chamber 2, and the other side of the sealing guide sleeve 3 docking with the carbonization chamber 2 is provided with a fifth discharge port. After the leveling of coal is completed, the sealing guide sleeve 3 retreats to the original position and does not contact the carbonization chamber 2; one side of the leveling coal 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 leveling coal rod 7 is located between the upper hopper 4 and the residual coal hopper 9, and the upper hopper 4 is located above the residual coal hopper 9. The third discharge port is provided with an upper hopper gate 6, and the upper hopper gate 6 is located between the third discharge port and the fourth feed port. The upper hopper gate 6 is located directly above the fourth feed port. The third feed port is located directly below the first discharge port. The sealing guide sleeve 3 is arranged horizontally, and has a horizontal cavity inside, and the leveling coal rod 7 moves horizontally back and forth in the horizontal cavity.

[0039] The present invention changes the internal operation process of the surplus coal returning device, and the lifting mechanism 5 works according to the capacity of the surplus coal hopper 9 and the coal powder in the upper hopper 4. When the coal powder in the upper hopper 4 is not full and there is coal powder in the surplus coal hopper 9, the lifting mechanism 5 starts without load, and then the lower gate plate 8 of the surplus coal hopper is opened, and the coal powder in the surplus coal hopper 9 falls into the lifting mechanism 5. The lifting mechanism 5 lifts the fallen coal powder into the upper hopper 4, and the upper hopper gate plate 6 remains closed. When the upper hopper 4 is full or the surplus coal hopper 9 is empty, the lower gate plate 8 of the surplus coal hopper is closed, and then the lifting mechanism 5 stops working.

[0040] When the coal leveling device is leveling coal, the coal leveling rod 7 moves forward, and the upper hopper gate plate 6 opens in advance, and a large amount of coal powder will fall into the sealing guide sleeve 3, and then be brought into the carbonization chamber 2 by the coal leveling rod 7; when the coal leveling rod 7 moves backward, the coal powder 1 in the carbonization chamber is brought out and falls into the residual coal hopper 9 along the rear chute of the sealing guide sleeve 3, and the lower gate plate in the residual coal hopper 9 (the lower gate plate 8 of the residual coal hopper) is closed, so that the lifting mechanism 5 is protected from the pressure of the coal powder and the load is reduced.

[0041] The efficient excess coal return device utilizes newly set upper and lower gates and an upper hopper 4, so that the lifting mechanism 5 can work without being restricted by the flat coal rod 7, which changes the operating process of the lifting mechanism 5 and improves the working efficiency. In addition, the lifting mechanism 5 can be started without load, thereby increasing the service life of the equipment.

[0042] In the existing excess coal return device, when the flat coal rod retreats from the carbonization chamber, the annular scraper does not work, and the coal powder in the carbonization chamber is taken out of the carbonization chamber by the flat coal rod retreating, and the amount of coal powder taken out is large. When the flat coal rod moves forward, the annular scraper starts to work. When the flat coal rod moves forward, the coal powder in the excess coal hopper is driven by the annular scraper to be lifted to a high place and falls into the sealing sleeve. The flat coal rod brings the coal powder in the sealing sleeve into the carbonization chamber. The coal powder lifted by the annular scraper is in a loose state and has a low density, and the amount of coal powder returned to the carbonization chamber is small. As a result, the coal powder in the excess coal hopper is increasing, and the load of the annular scraper is increasing. Finally, the annular scraper cannot work, and even the annular scraper will be damaged, resulting in the inability to realize the excess coal return function. In addition, the annular scraper cannot work continuously. The actual cumulative working time of the annular scraper is short and the working efficiency is low. On the other hand, it works frequently and intermittently, which affects the service life of the equipment.

[0043] Compared with the existing excess coal return device, the present invention adds an upper hopper and an upper gate plate to play a role in material replenishment buffering. When the flat coal rod moves forward, a large amount of coal powder in the upper hopper can fall into the sealing guide sleeve, thereby increasing the excess coal return amount; the lifting mechanism such as the annular scraper can work longer and is not restricted by the working direction of the flat coal rod, thereby improving the working efficiency of the excess coal return device. The lower gate plate provided in the present invention can reduce the starting resistance of the lifting mechanism such as the annular scraper, reduce the damage frequency, and increase the service life.

[0044] The present invention can be applied to the 7-meter coke pusher of Shuigang and the coke pusher products of other subsequent top-loading coal coke oven processes.

[0045] The application of the high-efficiency excess coal return device of the present invention can reduce the maintenance cost of users and improve the excess coal return efficiency of the equipment. The technology of the present invention is applied to the coke pusher for the first time. The technology has the characteristics of simple structure, reliability, high efficiency and durability, improves the efficiency and automation of the entire coke oven equipment operation, and enhances 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 highly efficient excess coal return device, characterized in that: include: A sealing guide sleeve (3), an upper hopper (4), a lifting mechanism (5), a flat coal rod (7), a residual coal hopper lower gate plate (8) and a residual coal hopper (9), wherein the lifting mechanism (5) is provided with a first material inlet below and a first material outlet above; the residual coal hopper (9) is provided with a second material outlet below and a second material inlet above; the first material inlet is connected to the second material outlet, the residual coal hopper lower gate plate (8) is provided at the second material outlet, and the residual coal hopper lower gate plate (8) is located between the second material outlet and the first material inlet; The upper part of the upper hopper (4) is provided with a third feed inlet at the top and a third feed outlet at the bottom; one side of the sealing guide sleeve (3) is provided with a fourth feed inlet and a fourth feed outlet connected to the inside, the third feed inlet is connected to the first feed outlet, the third feed outlet is connected to the fourth feed inlet, and the fourth feed outlet is located above the second feed inlet; The other side of the sealing guide sleeve (3) advances to the carbonization chamber (2) when leveling the coal and docks with the carbonization chamber (2), and a fifth discharge port is provided on the other side of the sealing guide sleeve (3) docking with the carbonization chamber (2). After the coal leveling is completed, the sealing guide sleeve (3) retreats to the 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), and the upper hopper (4) is located above the residual coal hopper (9).

2. The high-efficiency excess coal return device according to claim 1 is characterized in that: An upper hopper gate plate (6) is provided at the third discharge port, and the upper hopper gate plate (6) is located between the third discharge port and the fourth feed port.

3. The high-efficiency excess coal return device according to claim 2 is characterized in that: The upper hopper gate plate (6) is located directly above the fourth feed inlet.

4. The high-efficiency excess coal return device according to claim 1 is characterized in that: The third material inlet is located directly below the first material outlet.

5. The high-efficiency excess coal return device according to claim 1 is characterized in that: The sealing guide sleeve (3) is arranged transversely and has a transverse cavity inside, and the flat coal rod (7) performs transverse reciprocating movement in the transverse cavity.

6. The high-efficiency excess coal return device according to claim 1 is characterized in that: The lifting mechanism (5) is a ring-shaped scraper or a bucket elevator.

7. A working method of the high-efficiency excess coal return device according to any one of claims 1 to 6, characterized in that: The steps include: The lifting mechanism (5) works according to the capacity of the coal powder in the residual 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 residual coal hopper (9), the lifting mechanism (5) starts without load, then the lower gate plate (8) of the residual coal hopper is opened, and the coal powder in the residual coal hopper (9) falls into the lifting mechanism (5). The lifting mechanism (5) lifts the fallen coal powder into the upper hopper (4), and the gate plate (6) of the upper hopper remains closed. When the upper hopper (4) is full or the residual coal hopper (9) is empty, the lower gate plate (8) of the residual coal hopper is closed, and then the lifting mechanism (5) stops working. When the coal leveling device is leveling coal, the coal leveling rod (7) moves forward, the upper hopper gate (6) opens in advance, and a large amount of coal powder falls into the sealing guide sleeve (3), and is then brought into the carbonization chamber (2) by the coal leveling rod (7); when the coal leveling rod (7) moves backward, the coal powder (1) in the carbonization chamber is brought out and falls into the residual coal hopper (9) along the rear chute of the sealing guide sleeve (3), and the lower gate (8) of the residual coal hopper is closed, so that the lifting mechanism (5) is protected from the pressure of the coal powder and the load is reduced.

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