Automatic gas power dredging device and method for coking plant storage and distribution integrated silo

Abstract

The application discloses a coking plant storage and distribution integrated silo automatic gas power dredging device and method, belongs to the field of pulverized coal powder bin dredging, and the device is characterized in that a plurality of layers of arc-shaped blowing pipes are arranged outside the silo cone, and adjacent two layers of the arc-shaped blowing pipes are oppositely arranged, so that the coal in the silo cone can be completely loosened, the number of the spray heads of the arc-shaped blowing pipes can be reduced, and meanwhile, the middle coal can be prevented from being compacted due to opposite blowing at the same time, and the material can be prevented from being hardened.

Description

Technical Field

[0001] This invention belongs to the field of coal powder silo unblocking, specifically relating to an automatic gas-assisted unblocking device and method for integrated storage and distribution silos in coking plants. Background Technology

[0002] In recent years, with the continuous optimization of coking coal production preparation processes in coking plants, the efficient and environmentally friendly integrated coking coal silo process has gradually replaced the original open-air coal yard storage method. Each silo has a coal storage capacity of about 10,000 tons and an effective height of about 50 meters, realizing the storage and quantitative blending functions of different types of coking coal, and achieving a comprehensive upgrade of the coal blending process.

[0003] The coking coal used in coking plant production is all washed and refined coal that has undergone crushing and washing to reduce ash and sulfur content. The coal has a small particle size and high moisture content, typically controlled at 8-12%. After being transported to the plant by train or truck and unloaded, the coking coal is first temporarily stored in designated silos. As coking production progresses, a disc feeder carries the coal out from the bottom outlet of the silo. Electronic batching belt scales precisely control the disc speed, allowing different types of coal to be blended in different proportions. The turnover time of coking coal in the silo is generally 8-15 days. Due to differences in particle size, moisture content, and viscosity among different types of coking coal, as well as the influence of silo turnover time, feeding location, and ambient temperature and humidity, phenomena such as caking and adhesion to the silo walls may occur. Coking coal adheres to the inner wall of the silo. As the amount of coking coal adhering to the inner wall gradually increases, problems such as insufficient addition of single coal types at the silo outlet or material shortage can easily occur. In mild cases, this leads to substandard quality of blended coal, resulting in substandard quality of subsequent coke, reduced effective silo capacity, and reduced effective coal storage capacity. In severe cases, it can directly render the entire silo unusable, causing the coal blending production system to shut down and severely impacting coke oven production.

[0004] To prevent the above problems from occurring, existing technologies generally adopt the following methods: Firstly, the coking coal in the silos is periodically emptied, and personnel enter the silos to manually clean the material adhering to the walls. However, the silos used in coking plants are about 50 meters high. Whether the cleaning personnel enter from the bottom or the top, the work of cleaning the silo walls is labor-intensive, the working environment is poor, and there are significant safety risks.

[0005] Secondly, multiple air cannons and electric vibrators are installed at specific locations above the discharge port as a blockage clearing device. When blockage is detected, it is manually operated on-site for treatment. Although this method can play a certain role, it is limited by the range and angle of the air cannons and electric vibrators. While it can be effective for low-viscosity coals such as gas coal and 1 / 3 coking coal, it is not ideal for high-viscosity coking coal, fat coal, and lean coal. Often, the coking coal in the cleared area can fall normally, while the uncleared areas form cleaning dead zones, which become increasingly blocked, leading to a significant reduction in the effective capacity of the silo.

[0006] Furthermore, if all the silo outlets become blocked, some units resort to filling the silo with water from the top to saturate the coal and allow it to flow out automatically from the bottom outlet. However, since the effective height of coking coal inside the silo is over 40 meters, this method is very difficult to implement. Moreover, if a large amount of water-saturated coal suddenly sprays out from the bottom outlet, it poses a very high safety risk to surrounding equipment and personnel. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides an automatic gas-assisted unblocking device and method for coking plant integrated storage and distribution silos. The present invention sets up multiple layers of arc-shaped injection pipes on the outside of the silo cone, and sets adjacent layers of arc-shaped injection pipes facing each other. This can not only achieve complete unblocking of coal inside the silo cone, but also reduce the number of nozzles of the arc-shaped injection pipes. At the same time, it can prevent the coal in the middle from being compacted and causing material caking due to simultaneous opposite injection.

[0008] The technical problem to be solved by the present invention is achieved by the following technical solution: an automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants, comprising a jetting unit, a gas supply system, a batching system and a control system; The blowing unit includes an arc-shaped blowing pipe and a nozzle disposed on the arc-shaped blowing pipe. The arc-shaped blowing pipe is coaxially disposed on the outside of the silo cone, and the nozzle is inserted into the side wall of the silo cone. The silo cone is provided with multiple layers of spaced-apart jetting units from top to bottom, and the arc-shaped jetting pipes of two adjacent layers of jetting units are arranged opposite each other. The gas supply system is connected to each injection unit via control valves and is used to supply injection gas to the arc-shaped injection pipe. The cone-shaped discharge port of the silo is connected to the batching system, which includes a batching scale. The control system is connected to the control valve, batching scale, and gas supply system. It is used to collect real-time data from the batching scale and control the gas supply system and the opening and closing of the control valve. This device incorporates a PLC programmable controller, which compares the metering data from the batching scale with the set data in real time. Based on changes in the coking coal quantity, it automatically controls the operation of the device, eliminating the problems associated with manual supervision.

[0009] Preferably, the number of nozzles on each layer of the arc-shaped blowpipe decreases from top to bottom. Since the material inside the silo cone decreases sequentially from top to bottom, uniform material flow is ensured by configuring different numbers of nozzles on each layer.

[0010] Preferably, the bottom arc-shaped injection pipe has two nozzles to avoid excessive force during injection by the bottom injection unit, which could cause coking coal to be ejected from the disc feeder.

[0011] Preferably, the vertical distance between the arc-shaped injection pipes in two adjacent injection units is 1-1.5 meters. Setting the vertical distance between two adjacent injection units to 1-1.5 meters can both ensure that all coal inside the silo cone is loosened and reduce the number of nozzles required for the arc-shaped injection pipes.

[0012] Preferably, the nozzle outlet end of the present invention is a slanted opening that is longer at the top and shorter at the bottom, to prevent coking coal from falling directly into the nozzle or the arc-shaped injection pipe and causing blockage.

[0013] Preferably, the nozzle outlet end is provided with an anti-wear baffle to prevent nozzle wear and to direct the compressed air ejected from the nozzle in all directions, thereby increasing the unblocking effect.

[0014] Preferably, the gas supply system of the present invention includes a compressed gas storage tank, a main gas outlet pipe and branch gas outlet pipes, and a compressed gas supply source; The inlet of the compressed gas storage tank is connected to the compressed gas supply source; The compressed gas storage tank outlet is connected to the main exhaust pipe, which is connected to the blowing unit on each silo cone via branch exhaust pipes. Each silo cone corresponds to one branch exhaust pipe. The on-site main exhaust pipe is connected to the blowing unit on the silo cone via independent branch exhaust pipes. If the unblocking device of a certain silo cone malfunctions, it can be isolated for repair without affecting the gas conveying devices of other silo cones. Preferably, the main outlet pipe is equipped with an external manual main valve, and the outlet branch pipes are equipped with external manual branch valves and remote control valves, wherein the remote control valves are connected to the control system.

[0015] This invention also discloses a gas-assisted unblocking method for integrated storage and distribution silos in coking plants, utilizing the aforementioned automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants, comprising the following steps: During storage: The system has a preset program that automatically controls the gas supply and valve opening and closing of the gas supply system according to the preset interval. The injection unit is used to inject coking coal into the silo cone from bottom to top to prevent the coal from caking due to prolonged inactivity. During the batching process: The control system collects real-time data from the batching scale. When the batching amount is detected to be lower than the set flow rate, the blowing unit is controlled to automatically blow from bottom to top layer by layer. If the duration for which the amount of ingredients reaches the set flow rate value exceeds the preset time value, then the blowing will stop. If the duration for which the amount of ingredients reaches the set flow rate value is less than the preset time value, continue the next cycle of spraying until the set requirements are met.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention features a simple structure and ingenious design. By setting up multiple layers of spaced-apart injection units from top to bottom in the silo cone, with the arc-shaped injection pipes of adjacent injection units positioned opposite each other, layered and grouped injection is achieved. This ensures that the coking coal in the silo is injected and loosened without any dead angles, effectively preventing material adhesion and caking. Furthermore, the shape of the arc-shaped injection pipes prevents the coal in the middle from being compacted due to simultaneous injection from opposite directions, thus avoiding the problem of material caking.

[0017] This invention also enables automatic operation of the injection and unblocking system by sharing signals with the automatic coal blending system. This effectively avoids fluctuations in the quality of blended coal or coke caused by workers failing to detect when the coal blending quantity is below the threshold, reducing workload while ensuring production quality.

[0018] This device can be widely applied to similar conical or square storage silos in other additive industries such as soda ash, caustic soda, and calcium carbonate, and will achieve very good results. Attached Figure Description

[0019] Figure 1 This is a front view of the automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants according to the present invention; Figure 2 This is a schematic diagram of the structure of the two-layer arc-shaped jet pipe of the present invention; Figure 3 This is a schematic diagram of the structure of the three to four layers of arc-shaped jet pipe of the present invention; Figure 4 This is a schematic diagram of the nozzle structure of the present invention; Figure 5 This is a schematic diagram of the installation of the wear-resistant baffle of the present invention; In the diagram, 1 is an arc-shaped blowpipe, 2 is a nozzle, 100 is a silo cone, 3 is a control valve, 200 is a batching scale, 4 is an anti-wear baffle, 5 is a compressed gas storage tank, 6 is a main outlet pipe, 7 is a branch outlet pipe, 61 is an external manual main valve, 71 is an external manual branch valve, and 72 is a remote control valve. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will now be clearly and completely described in conjunction with the accompanying drawings.

[0021] This invention provides a fully automatic combined compressed air-assisted unblocking device that regularly loosens the coking coal in the lower conical section of the silo in advance to prevent caking and adhesion. Once signs of blockage appear, it performs layered and orderly unblocking to avoid the above-mentioned problems and lays the foundation for the normal blending of coking coal.

[0022] This device is suitable for coking plant coal blending systems, including integrated silo coal blending systems or separate coal blending tank systems (i.e., batching systems). Addressing the advantages and disadvantages of existing blockage clearing devices, this design proposes layering and grouping multiple sets of stainless steel nozzle assemblies on the exterior of the lower conical section of the silo. Each layer can be individually controlled for spraying. It is recommended to install 4-5 sets of spraying devices on-site, arranged in layers facing each other from bottom to top. Specifically, the first layer should be located on the left side of the cone, the second layer on the right side (approximately 1 meter higher than the first layer), and the third layer on the left side of the cone again, alternating between layers.

[0023] A PLC control cabinet for an on-site assisted dredging device was added. Through remote control of the valves, the device enables the nozzles inside the silo cone 100 to spray and dredge in different sequences, preventing coking coal from caking and sticking. Specifically: like Figures 1-5 As shown, an automatic gas-assisted unblocking device for an integrated storage and distribution silo in a coking plant includes a jetting unit, a gas supply system, a batching system, and a control system. The unblocking device includes a PLC control cabinet, internal program modules, remote signal transmission from the central control room coal batching system, and supporting safety protection facilities such as ladders, platforms, and guardrails. The discharge port of the silo cone 100 is equipped with a discharge port gate valve and a disc feeder. The disc feeder has a motor drive system. Below the discharge port of the silo cone 100, there is a material discharge hopper for the disc feeder and a small batching conveyor belt. A small batching conveyor belt discharge hopper is located at the end of the small batching conveyor belt. The small batching conveyor belt is equipped with a batching scale 200, and a large batching conveyor belt is located below the small batching conveyor belt discharge hopper.

[0024] The blowing unit includes an arc-shaped blowing pipe 1 and nozzles 2 disposed on the arc-shaped blowing pipe 1. The arc-shaped blowing pipe 1 is coaxially disposed on the outside of the silo cone 100, and the nozzles 2 are inserted into the side wall of the silo cone 100. The arc-shaped blowing pipe 1 is semi-circular, and a blind plate is provided at its end for sealing. The nozzles 2 are evenly spaced along the circumference of the arc-shaped blowing pipe 1.

[0025] The silo cone 100 is provided with multiple layers of spaced-apart blowing units from top to bottom, and the arc-shaped blowing pipes 1 of adjacent two layers of blowing units are arranged opposite each other.

[0026] The gas supply system is connected to each injection unit via control valve 3, and is used to supply injection gas to the arc-shaped injection pipe 1.

[0027] The discharge port of the silo cone 100 is connected to the batching system, which includes a batching scale 200.

[0028] The control system is connected to the control valve 3, the batching scale 200 and the air supply system, and is used to collect real-time data of the batching scale 200 and control the air supply of the air supply system and the opening and closing of the control valve 3.

[0029] The number of nozzles 2 on each layer of arc-shaped blowpipe 1 decreases from top to bottom. In this embodiment, five layers of blowpipe units are provided. Since the lower diameter of the silo cone 100 is relatively small, at 1.5-2 meters, and the uppermost diameter is relatively large, at 5-6 meters, two nozzles are provided on the bottommost layer of arc-shaped blowpipe 1, three nozzles are provided on the second layer of arc-shaped blowpipe 1, and four nozzles are provided on the third to fifth layers of arc-shaped blowpipe 1.

[0030] The bottom arc-shaped blowpipe 1 has two nozzles 2.

[0031] The vertical distance between the arc-shaped blow pipes 1 in two adjacent blow units is 1-1.5 meters.

[0032] The nozzle 2 has an oblique opening at the outlet end that is longer at the top and shorter at the bottom.

[0033] A wear-resistant baffle 4 is installed above the outlet end of the nozzle 2. A circular stainless steel wear-resistant baffle at an angle of about 45 degrees is welded to the upper part of the nozzle front end to protect the nozzle from wear by the continuously falling coking coal. At the same time, it can prevent the compressed air ejected from the nozzle from rushing straight forward. After being backed by the wear-resistant baffle, the ejected compressed air is sprayed outward along the lower part of the wear-resistant baffle, increasing the spraying and unblocking area and improving the unblocking effect.

[0034] The gas supply system includes a compressed gas storage tank 5, a main outlet pipe 6, branch outlet pipes 7, and a compressed gas supply source. The compressed gas supply source is either the plant's internal compressed air network or a newly added air compressor.

[0035] The inlet of the compressed gas storage tank 5 is connected to the compressed gas supply source.

[0036] The outlet of the compressed gas storage tank 5 is connected to the main outlet pipe 6. The main outlet pipe 6 is connected to the injection unit on each silo cone 100 through the branch outlet pipes 7. Each silo cone 100 corresponds to one branch outlet pipe 7.

[0037] The main outlet pipe 6 is equipped with an external manual main valve 61, and the outlet branch pipe 7 is equipped with an external manual branch valve 71 and a remote control valve 72. The remote control valve 72 is connected to the control system.

[0038] A gas-assisted unblocking method for integrated storage and distribution silos in coking plants, utilizing the automatic gas-assisted unblocking device for integrated storage and distribution silos described in this embodiment, includes the following steps: During storage: A preset program within the control system automatically controls the gas supply system and the opening and closing of control valve 3 at preset intervals. From bottom to top, the injection unit sequentially injects gas into the coking coal within the silo cone 100 to prevent caking caused by prolonged stagnation. The interval can be manually set according to the coal type and properties, and the number of injection layers can be preset, such as 1 to 3 layers from bottom to top, or 1 to 5 layers.

[0039] During the batching process: The control system collects real-time data from the batching scale 200. When the batching amount is detected to be lower than the set flow rate, the control unit automatically sprays the material from bottom to top.

[0040] If the duration for which the amount of ingredients reaches the set flow rate value exceeds the preset time value, then the blowing will stop.

[0041] If the duration for which the amount of ingredients reaches the set flow rate value is less than the preset time value, continue the next cycle of spraying until the set requirements are met.

[0042] By integrating electronic batching belt scales with each individual coal storage tank in the coking plant's coal blending system, the amount of coal fed into each type can be monitored in real time. If the central control room's coal blending system detects that the coal quantity is below the set flow rate, it can immediately send a low-flow alarm signal to the PLC control cabinet of the on-site unblocking device. The PLC control cabinet then controls the remote control valves on-site to automatically spray water layer by layer from bottom to top. If the batching quantity keeps up, the spraying stops. If the required flow rate is still not reached, a second cycle of spraying continues until the batching quantity of that coal type meets the set requirements. Multiple nozzles are installed around the perimeter and along the height of the silo cone. Through program settings, these nozzles automatically spray and convey coal according to a set sequence, achieving bottom-to-top, comprehensive unblocking of coking coal and eliminating blockages caused by material adhesion and caking. This program can be interlocked and unlocked as needed, making it convenient and practical.

[0043] If a blockage persists in a particular location and cannot be resolved, the sound during the purging process can be used to determine the cause. If the sound remains consistently crisp, it indicates that the suspended coking coal in that area has not been completely eliminated. In this case, switch to manual mode and manually operate one or two layers of the arc-shaped purging pipes 1 to continuously purge until the problem is resolved.

Claims

1. An automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants, characterized in that: This includes the injection unit, air supply system, batching system, and control system; The blowing unit includes an arc-shaped blowing pipe (1) and a nozzle (2) disposed on the arc-shaped blowing pipe (1). The arc-shaped blowing pipe (1) is coaxially disposed on the outside of the silo cone (100), and the nozzle (2) is inserted into the side wall of the silo cone (100). The silo cone (100) is provided with multiple layers of spaced-apart spray units from top to bottom, and the arc-shaped spray pipes (1) of two adjacent spray units are arranged opposite each other. The gas supply system is connected to each injection unit through control valve (3) to supply injection gas to the arc-shaped injection pipe (1); The discharge port of the silo cone (100) is connected to the batching system, which includes a batching scale (200). The control system is connected to the control valve (3), the batching scale (200) and the air supply system, and is used to collect real-time data of the batching scale (200) and control the air supply of the air supply system and the opening and closing of the control valve (3).

2. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 1, characterized in that: The number of nozzles (2) on each layer of arc-shaped blowpipe (1) decreases from top to bottom.

3. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 2, characterized in that: The number of nozzles (2) on the bottom arc-shaped blowpipe (1) is two.

4. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 1, characterized in that: The vertical distance between the arc-shaped blow pipes (1) in two adjacent blow units is 1-1.5 meters.

5. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 1, characterized in that: The nozzle (2) has an oblique opening at the outlet end that is longer at the top and shorter at the bottom.

6. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 1 or 5, characterized in that: A wear-resistant baffle (4) is provided above the outlet end of the nozzle (2).

7. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 1, characterized in that: The gas supply system includes a compressed gas storage tank (5), a main gas outlet pipe (6), a branch gas outlet pipe (7), and a compressed gas supply source; The inlet of the compressed gas storage tank (5) is connected to the compressed gas supply source; The outlet of the compressed gas storage tank (5) is connected to the main outlet pipe (6), and the main outlet pipe (6) is connected to the blowing unit on each silo cone (100) through the outlet branch pipe (7). Each silo cone (100) corresponds to one outlet branch pipe (7).

8. The automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in claim 7, characterized in that: The main outlet pipe (6) is equipped with an external manual main valve (61), and the outlet branch pipe (7) is equipped with an external manual branch valve (71) and a remote control valve (72). The remote control valve (72) is connected to the control system.

9. A gas-assisted unblocking method for integrated storage and distribution silos in coking plants, utilizing the automatic gas-assisted unblocking device for integrated storage and distribution silos in coking plants as described in any one of claims 1 to 8, characterized in that... Includes the following steps: During storage: The system has a preset program to automatically control the gas supply and control valve (3) of the gas supply system according to the preset interval time. The coking coal in the silo cone (100) is injected from bottom to top using the injection unit to prevent the coal from caking due to prolonged inactivity. During the batching process: The control system collects real-time data from the batching scale (200). When the batching amount is detected to be lower than the set flow rate, the blowing unit is controlled to automatically blow from bottom to top layer by layer. If the duration for which the amount of ingredients reaches the set flow rate value exceeds the preset time value, then the blowing will stop. If the duration for which the amount of ingredients reaches the set flow rate value is less than the preset time value, continue the next cycle of spraying until the set requirements are met.

Images