Dust ash feeding device

Abstract

The application discloses a dust ash feeding device and relates to the technical field of solid waste treatment. The dust ash feeding device comprises a first discharging pipeline, a screw conveyor and a controller. The first discharging pipeline comprises a first end and a second end which are in communication with each other and is used for sealingly conveying dust ash in a direction, wherein the first end is communicated with a storage tank. The screw conveyor comprises a sealing pipeline and a second discharging pipeline which are in communication with the second end. A screw rod is arranged in the sealing pipeline. A driving motor is arranged on the screw rod outside the sealing pipeline. One end of the second discharging pipeline is communicated with the sealing pipeline at the feeding end of the screw rod. The other end of the second discharging pipeline is aligned with a position to be fed. The controller is electrically connected with the screw conveyor and a belt scale which is used for weighing the weight of the mixture at the position to be fed. The controller adjusts the output power of the driving motor according to the data received by the belt scale. The dust ash feeding device can improve the uniformity of dust ash distribution, reduce secondary dust raising caused by the impact of dust ash discharging, guarantee the stability of feeding speed and the continuity of feeding.

Description

Technical Field

[0001] This invention belongs to the field of solid waste treatment technology, and more specifically, relates to a dust collection and ash feeding device. Background Technology

[0002] Dust collector ash, such as high-temperature flue gas from sintering machine heads and dust collector ash from blast furnace and converter gas systems, is inevitably generated during production processes. The metallurgical industry has long been a major contributor to environmental pollution. With increasing national emphasis on environmental protection and increasingly stringent requirements for industrial hazardous waste disposal, the metallurgical industry faces immense environmental pressure and bears the challenge of disposing of industrial solid waste and hazardous waste. Stainless steel dust collector ash is a type of industrial hazardous waste with high recycling value, containing high levels of elements such as Fe, Cr, and Ni. The composition of these elements varies depending on the specific process in which the dust collector ash is produced.

[0003] In related technologies, the collected dust is utilized within the plant. Some is used for briquetting and steelmaking, but most is used for sintering mixing. The dust is transported to the sintering plant by a dust collection truck, then sucked into a storage tank by a dust collection device. From there, it falls through a discharge pipe onto the lower batching conveyor belt and enters the mixture. However, directly feeding the dust onto the batching conveyor belt results in unstable feeding speeds, uneven distribution of the dust on the belt, and inconsistent quality of the sintered mixture. Summary of the Invention

[0004] To address the problems mentioned above in the background art, the present invention provides a dust collection ash feeding device to at least improve the uniformity of dust collection ash distribution on the feeding belt.

[0005] The dust collection ash feeding device of the present invention includes: a first feeding pipe, including a first end and a second end connected to each other, for directional and sealed conveying of dust collection ash, wherein the first end is connected to a storage tank; a screw conveyor, including a sealed pipe connected to the second end and a second feeding pipe, the sealed pipe having a built-in screw rod, a drive motor being arranged on the screw rod outside the sealed pipe, one end of the second feeding pipe being connected to the sealed pipe at the feeding end of the screw rod, and the other end of the second feeding pipe being aligned with the feeding position; and a controller electrically connected to the screw conveyor and a belt scale for weighing the mixture at the feeding position, the controller adjusting the output power of the drive motor according to the data received from the belt scale.

[0006] Preferably, the dust collection and feeding device further includes a rotary feeder, and the storage tank is connected to the first discharge pipe through the rotary feeder; the rotary feeder is disposed between the storage tank and the first end, the inlet of the rotary feeder is detachably connected to the outlet of the storage tank, and the outlet of the rotary feeder is connected to the first end; the rotary feeder is electrically connected to a controller, and the controller adjusts the output power of the drive motor and the output power of the rotary feeder respectively according to the data received from the belt scale.

[0007] In any of the above schemes, preferably, when the weight at the feeding position measured by the belt scale is higher than the target threshold range, the controller controls the star feeder to reduce the feeding speed into the first feeding pipe, and / or the controller controls the drive motor to reduce the output power and slow down the feeding speed into the second feeding pipe; when the weight at the feeding position measured by the belt scale is lower than the target threshold range, the controller controls the star feeder to increase the feeding speed into the first feeding pipe, and the controller controls the drive motor to increase the output power and speed up the feeding speed into the second feeding pipe.

[0008] In any of the above schemes, it is preferred that the first and second feeding pipes are bends, wherein the outlet of the second feeding pipe is vertically downward.

[0009] In any of the above solutions, it is preferred that the sealing pipe is a straight pipe, and gradually slopes upward from the feeding start end of the screw rod to the feeding end end of the screw rod, with the height of the feeding end end being lower than the height of the discharge port of the storage tank or the height of the discharge port of the star feeder.

[0010] In any of the above solutions, it is preferred that the sealed pipe is connected to a mounting bracket, and the drive motor is fixed to the mounting bracket.

[0011] In any of the above solutions, it is preferable that the outlet of the second discharge pipe is equipped with a shut-off valve.

[0012] In any of the above schemes, it is preferred that the storage tank and the first end are respectively provided with mounting flanges for the feed inlet and discharge outlet of the star feeder.

[0013] In any of the above solutions, it is preferred that the storage tank is equipped with at least one vibration motor.

[0014] In any of the above solutions, it is preferable that the drive motor and the screw rod are detachably connected.

[0015] Through the above design, the present invention can achieve at least the following beneficial effects:

[0016] The dust collection ash feeding device of the present invention connects a storage tank to the first end of a first feeding pipe and a screw conveyor to the second end of the first feeding pipe. The screw conveyor has a stable and continuous conveying speed, which makes the dust collection ash distribution at the feeding position more uniform. Furthermore, by distributing the material at the feeding position through the screw conveyor, the height from which the material is directly fed from the storage tank to the feeding position is reduced, thus mitigating the impact of the dust collection ash falling to the feeding position and reducing secondary dust generation at the feeding position, thereby reducing environmental pollution. Attached Figure Description

[0017] Figure 1This is a schematic diagram of an embodiment of the dust removal ash feeding device and storage tank assembly of the present invention;

[0018] Figure 2 This is a schematic diagram of another embodiment of the dust removal ash feeding device and storage tank assembly of the present invention.

[0019] Explanation of the labels in the diagram:

[0020] 1-First discharge pipe; 11-First end; 12-Second end; 2-Storage tank; 3-Screw conveyor; 31-Sealed pipe; 32-Second discharge pipe; 4-Screw rod; 41-Feeding end; 42-Feeding start end; 5-Drive motor; 6-Controller; 7-Star feeder; 8-Mounting bracket; 9-Mounting flange; 10-Vibration motor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0022] Furthermore, in the description of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. The terms "connected" and "linked" used in this invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] The metallurgical industry has long been a major contributor to environmental pollution. With increasing national emphasis on environmental protection and increasingly stringent requirements for industrial hazardous waste disposal, the metallurgical industry faces immense environmental pressure and bears the challenge of handling industrial solid waste and hazardous waste. Dust collector ash is sucked into storage tank 2 via a dust collection device and then falls through a downward-sloping straight pipe onto the lower batching conveyor belt, entering the mixture. Directly feeding the dust collector ash through the pipe results in uneven distribution on the conveyor belt. Furthermore, because the dust collector ash is a particulate matter, it generates significant impact force as it falls from the feeding pipe. This impact on the batching conveyor belt creates secondary dust at the discharge port, severely polluting the surrounding air and reducing the dust collector ash recovery rate.

[0024] The present invention aims to solve the problems existing in the above-mentioned related technologies and provide a dust removal ash feeding device for sintering mixing, so as to improve the uniformity of dust removal ash distribution and reduce secondary dust generation at the feeding position during the dust removal ash distribution process.

[0025] Figure 1 This is a schematic diagram of an embodiment of the dust removal ash feeding device and storage tank assembly of the present invention; Figure 2 This is a schematic diagram of another embodiment of the dust collection and ash feeding device and storage tank assembly of the present invention, as shown below. Figure 1 and Figure 2 As shown, the dust collection ash feeding device in this embodiment may include a first feeding pipe 1, a screw conveyor 3, and in some embodiments, a controller 6 may also be provided. The first feeding pipe 1 may include a first end 11 and a second end 12 connected to each other for directional and sealed conveying of dust collection ash. The first end 11 is connected to a storage tank 2. The screw conveyor 3 may include a sealed pipe 31 connected to the second end 12 and a second feeding pipe 32. The sealed pipe 31 has a built-in screw rod 4, and a drive motor 5 is configured on the screw rod 4 outside the sealed pipe 31. One end of the second feeding pipe 32 is connected to the sealed pipe 31 at the feeding end 41 of the screw rod 4, and the other end of the second feeding pipe 32 is aligned with the feeding position. The controller 6 may be electrically connected to the screw conveyor 3 and a belt scale for weighing the mixture at the feeding position. The controller 6 adjusts the output power of the drive motor 5 based on the data received from the belt scale. Alternatively, the output power of the drive motor 5 may be adjusted by an operator according to different mixture ratios.

[0026] In this embodiment, the second end 12 of the first feeding pipe 1 can be connected to one end of the sealed pipe 31. The sealed pipe 31 gradually slopes upward from this end, so that the dust from the storage tank 2 falls into the sealed pipe 31 through the first feeding pipe 1. Thus, even if the dust impacts the sealed pipe 31, the dust generated by the dust will be sealed within the sealed pipe 31, preventing dust pollution to the outside. The dust entering the sealed pipe 31 is transported to the second feeding pipe 32 by the drive motor 5 driving the screw 4 to rotate, and then falls to the feeding position through the second feeding pipe 32. The output power of the drive motor 5, i.e., the rotational speed of the screw 4, can be adjusted by the controller 6.

[0027] The controller 6 adjusts the drive motor 5 based on the weight data measured by the belt scale at the feeding position. In the absence of a controller 6, the operator can also adjust the output power of the drive motor 5 based on the weight data from the belt scale. The feeding position can be the batching belt, and the weight data can be the total weight of the mixture on the belt. The feeding position can be a section of the batching belt. The proportion of the mixture needs to be adjusted based on the amount of dust collected, according to the usage of other materials. Therefore, the appropriate proportion of dust collected on the batching belt can be achieved by adjusting the output power of the drive motor 5. After the proportion is set, the belt scale sends a signal to the controller 6 or displays the weight value. If more dust collects onto the batching belt, the weight data measured by the belt scale is fed back to the controller 6, which then adjusts the output power of the drive motor 5. When the weight at the feeding position measured by the belt scale is higher than the target threshold range, the controller 6 controls or the operator controls the drive motor 5 to reduce the output power and slow down the feeding speed into the second feeding pipe 32; when the weight at the feeding position measured by the belt scale is lower than the target threshold range, the controller 6 controls or the operator controls the drive motor 5 to increase the output power and speed up the feeding speed into the second feeding pipe 32.

[0028] The drive motor 5 adjusts the rotation speed of the screw rod 4 according to the different proportions of the mixture, thereby adjusting the feeding speed of the dust collector ash to the feeding position. The drive motor 5 is the active component, ensuring the continuity of dust collector ash delivery to the second discharge pipe 32. Even if excessive dust collector ash accumulates in the first discharge pipe 1, the rotation speed of the screw rod 4 will be adjusted according to the power of the drive motor 5 as controlled by the controller 6 or set by the operator, preventing excessive ash from falling to the feeding position. Therefore, the uniformity and continuity of the dust collector ash distribution to the feeding position by the dust collector ash feeding device in this embodiment can be guaranteed.

[0029] In addition, the height of the connection between the second feeding pipe 32 and the sealing pipe 31 is lower than the height of the discharge port of the storage tank 2. Compared with the method of directly dropping material from the discharge port of the storage tank to the feeding position in related technologies, this embodiment reduces the falling height of the dust collector ash, thereby reducing the impact of the dust collector ash falling to the feeding position, effectively reducing secondary dust generation of the dust collector ash at the feeding position, reducing the degree of environmental pollution, and reducing the threat of dust inhalation to operators near the feeding position.

[0030] Furthermore, the first discharge pipe 1 and the second discharge pipe 32 can be configured as bends, wherein the outlet of the second discharge pipe 32 is vertically downward. Dust collector ash enters the first discharge pipe 1 from the storage tank 2 via the first end 11, and then enters the sealed pipe 31 of the screw conveyor 3 via the second end 12. The first discharge pipe 1 is configured as a bend, as shown in the following figure. Figure 1 and Figure 2The first feeding pipe 1 can be inclined to the left from the first end 11 to the middle position of the first feeding pipe 1, and then inclined to the right from the middle position to the second end, so as to form a bend in the middle position of the first feeding pipe 1. During the falling process of the first feeding pipe 1, the dust can collide with the inner wall of the first feeding pipe 1 at the starting position of the right bend in the middle, which reduces the impact caused by the dust falling directly from the outlet of the storage tank 2 to the sealed pipe 31, and further reduces the amount of secondary dust generated by the dust.

[0031] In this embodiment, the second end 12 of the first feeding pipe 1 connects to the sealing pipe 31 at a location that is on the side wall of the sealing pipe 31, rather than at the end of the sealing pipe 31 along its central axis. The spiral rod 4 inside the sealing pipe 31 is arranged to coincide with the central axis of the sealing pipe 31. The end of the sealing pipe 31 is sealed perpendicular to its central axis. The drive motor 5 can be detachably connected to the spiral rod 4. A portion of the spiral rod 4 near its end penetrates the sealing pipe 31 and is detachably connected to the power output shaft of the drive motor 5. This connection can be a pin connection, a snap-fit ​​connection, or other similar methods, which will not be listed or limited in this embodiment.

[0032] In some embodiments, the dust collection and ash feeding device may further include a rotary feeder 7. The storage tank 2 can be connected to the first discharge pipe 1 via the rotary feeder 7; the rotary feeder 7 is disposed between the storage tank 2 and the first end 11, the inlet of the rotary feeder 7 is detachably connected to the outlet of the storage tank 2, and the outlet of the rotary feeder 7 is connected to the first end 11; the rotary feeder 7 can be electrically connected to the controller 6. The controller 6 adjusts the output power of the drive motor 5 and the output power of the rotary feeder 7 respectively based on the data received from the belt scale, or based on the weight data displayed by the operator at the feeding position on the belt scale.

[0033] Different mixtures require different component ratios, and the amount of dust collector ash used is also adjusted according to different mixtures. Specifically, a corresponding weight value or weight range can be set for the belt scale of the batching conveyor. The controller 6 compares the weight value monitored by the belt scale in real time with the set weight value or weight range, and adjusts the output power of the star feeder 7 and the drive motor 5 according to the comparison result, thereby adjusting the feeding speed of the dust collector ash. When the weight at the feeding position measured by the belt scale is higher than the target threshold range, the controller 6 controls or the operator controls the star feeder 7 to reduce the feeding speed into the first feeding pipe, and / or the controller 6 controls or the operator controls the drive motor 5 to reduce the output power, slowing down the feeding speed into the second feeding pipe 32; when the weight at the feeding position measured by the belt scale is lower than the target threshold range, the controller 6 controls or the operator controls the star feeder 7 to increase the feeding speed into the first feeding pipe 1, and the controller 6 controls or the operator controls the drive motor 5 to increase the output power, accelerating the feeding speed into the second feeding pipe 32.

[0034] Storage tank 2 and first end 11 can be respectively provided with mounting flanges 9 to cooperate with the feed port and discharge port of star feeder 7. During installation, a sealing gasket can also be installed between mounting flange 9 and star feeder 7 to ensure the sealing effect of the connection.

[0035] The feeding speed of the dust removal ash feeding device in this embodiment can be adjusted to the feeding position by coordinating the belt scale with the controller 6 or the operator, to suit the amount of dust removal ash required in the production process of mixtures with different proportions. Furthermore, both the drive motor 5 and the star feeder 7 are active components, and their cooperation ensures the continuity of dust removal ash feeding and the uniformity of the dust removal ash at the feeding position. In addition, the process from the outlet of the storage tank 2 to the outlet of the second discharge pipe 32 is carried out in a closed space to avoid polluting the surrounding environment. The sealed pipe 31 is a straight pipe, and it gradually slopes upwards from the feeding start end 42 of the screw rod 4 to the feeding end 41 of the screw rod 4. The height of the feeding end 41 is lower than the height of the outlet of the storage tank 2 or the height of the outlet of the star feeder 7, reducing the vertical height of the dust removal ash falling to the feeding position. In this embodiment, the sealed pipe 31 is configured as follows... Figure 1 and Figure 2As shown, the dust collector slopes from the lower left to the upper right. Dust collector ash enters the sealed pipe 31 from the second end 12. Due to its own gravity, the dust collector ash can accumulate at the connection point 12 of the sealed pipe 31 when there is excessive material falling from the storage tank 2. If the sealed pipe 31 slopes downwards from the lower left to the lower right, when there is excessive material falling from the storage tank 2 or when feeding stops, the dust collector ash remaining in the first discharge pipe 1 or the sealed pipe 31 will continue to move downwards along the spiral rod 4 of the sealed pipe 31 due to its own gravity. This will result in excessive feeding at the feeding position, causing uneven material distribution at the feeding position and exceeding the target dust collector ash feeding amount, still causing secondary dust generation at the feeding position. Through the above design, the feeding amount of dust collector ash at the feeding position can be controlled by the star feeder 7 and the screw conveyor 3, which can reduce secondary dust generation at the second discharge pipe 32 to a certain extent, reduce pollution to the surrounding environment, improve the utilization rate of dust collector ash, and reduce the threat to the personal safety of surrounding operators.

[0036] Furthermore, to prevent gas backflow in the first discharge pipe 1, the star feeder 7, the sealed pipe 31, and the second discharge pipe 32, a shut-off valve can be installed at the outlet of the second discharge pipe 32. When dust falls from the second discharge pipe 32, the shut-off valve opens to ensure that the dust falls to the feeding position; when no dust falls from the second discharge pipe 32, the shut-off valve closes to block the outlet of the second discharge pipe 32.

[0037] In some embodiments, to ensure the stability of the engagement between the drive motor 5 and the screw rod 4 and to keep the power output shaft of the drive motor 5 and the central axis of the screw rod 4 coincide, a mounting bracket 8 can be connected to the sealed pipe 31, and the drive motor 5 can be fixed to the mounting bracket 8 to keep the drive motor 5 and the sealed pipe 31 relatively stationary. This ensures that the power output shaft of the drive motor 5 will not generate a deflection force on the screw rod 4.

[0038] In some embodiments, the storage tank 2 may also be equipped with at least one vibration motor 10 for vibrating the storage tank 2, so that the dust in the storage tank 2 can be vibrated and fall to the discharge port of the storage tank 2 due to gravity, thus avoiding the phenomenon of dust sticking to the wall caused by dampness or caking due to compression in the storage tank. The vibration motor 10 can shake off the dust sticking to the wall or shake off the caking dust, thus preventing the caking dust from falling to the feeding position and ensuring the uniformity of the dust distribution at the feeding position.

[0039] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its essence or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A dust collection and ash feeding device, characterized in that, include: The first discharge pipe (1) includes a first end (11) and a second end (12) that are connected to each other, for directional and sealed conveying of dust, wherein the first end (11) is connected to the storage tank (2). The screw conveyor (3) includes a sealed pipe (31) connecting the second end (12) and a second discharge pipe (32). The sealed pipe (31) has a built-in screw rod (4). A drive motor (5) is arranged on the screw rod (4) outside the sealed pipe (31). One end of the second discharge pipe (32) is connected to the sealed pipe (31) at the feeding end (41) of the screw rod (4). The other end of the second discharge pipe (32) is aligned with the feeding position. The controller (6) is electrically connected to the screw conveyor (3) and the belt scale used to weigh the mixture at the feeding position. The controller (6) adjusts the output power of the drive motor (5) according to the data received from the belt scale. The dust removal ash feeding device also includes a star feeder (7), and the storage tank (2) is connected to the first discharge pipe (1) through the star feeder (7); The star-shaped feeder (7) is disposed between the storage tank (2) and the first end (11). The feed inlet of the star-shaped feeder (7) is detachably connected to the discharge outlet of the storage tank (2). The discharge outlet of the star-shaped feeder (7) is connected to the first end (11). The star feeder (7) is electrically connected to the controller (6). The controller (6) adjusts the output power of the drive motor (5) and the output power of the star feeder (7) according to the data received from the belt scale. The first discharge pipe (1) and the second discharge pipe (32) are bent pipes, wherein the discharge port of the second discharge pipe (32) is vertically downward.

2. The dust collection and ash feeding device according to claim 1, characterized in that, When the weight of the material to be fed at the location measured by the belt scale is higher than the target threshold range, the controller (6) controls the star feeder (7) to reduce the feeding speed to the first feeding pipe, and / or the controller (6) controls the drive motor (5) to reduce the output power and slow down the feeding speed to the second feeding pipe (32); When the weight of the material to be fed at the belt scale is lower than the target threshold range, the controller (6) controls the star feeder (7) to increase the feeding speed to the first feeding pipe (1), and the controller (6) controls the drive motor (5) to increase the output power and speed up the feeding speed to the second feeding pipe (32).

3. The dust collection and ash feeding device according to claim 2, characterized in that, The sealed pipe (31) is a straight pipe, and it gradually slopes upward from the feeding start end (42) of the screw rod (4) to the feeding end end (41) of the screw rod (4). The height of the feeding end end (41) is lower than the height of the outlet of the storage tank (2) or the height of the outlet of the star feeder (7).

4. The dust collection and ash feeding device according to claim 3, characterized in that, The sealed pipe (31) is connected to the mounting bracket (8), and the drive motor (5) is fixed to the mounting bracket (8).

5. The dust collection and ash feeding device according to claim 1, characterized in that, The storage tank (2) and the first end (11) are respectively provided with mounting flanges (9) that cooperate with the feed inlet and discharge outlet of the star feeder (7).

6. The dust collection and ash feeding device according to claim 1, characterized in that, The storage tank (2) is equipped with at least one vibration motor (10).

7. The dust collection and ash feeding device according to claim 1, characterized in that, The drive motor (5) is detachably connected to the screw rod (4).

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