Pneumatic ash conveying system for vacuum bag-type dust collector

Abstract

The utility model relates to the technical field of dust removal and ash conveying equipment matched with secondary refining of molten steel, and discloses a pneumatic ash conveying system for a vacuum bag-type dust collector, which comprises an ash hopper of the vacuum bag-type dust collector, a manual feed valve, an automatic feed valve, an ash bin and a level gage, the bottom of the ash hopper is connected with a manual feeding valve, the manual feeding valve continues to be downwards connected with an automatic feeding valve, the automatic feeding valve is installed on a feeding port of the ash bin, and a level gage is further installed on the top of the ash bin; the plurality of ash bins are connected in series through the pneumatic ash conveying device, and discharge ports of the ash bins are connected with the pneumatic ash conveying device. Compared with the prior art, the dust collector has the advantages that the plurality of dust bins are connected in series through the pneumatic dust conveying device, the discharge ports of the dust bins are connected with the pneumatic dust conveying device, and the pneumatic dust conveying device conveys the dust in the dust bins to the suction pressure conveying vehicle, so that the dust can be smoothly conveyed under the condition that the normal work of the dust collector in a vacuum state is not influenced.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal and ash conveying equipment for secondary refining of molten steel, specifically to a pneumatic ash conveying system for a vacuum bag filter. Background Technology

[0002] In the vacuum degassing system of mechanical pumps for secondary steel refining, the dust collector plays an important role. The dust collector has high processing efficiency, which can reduce mechanical pump failures, extend the maintenance cycle of the vacuum degassing system, reduce the system's operating costs, and alleviate the pressure brought by environmental protection issues.

[0003] The dust processed by the dust collector is discharged into the ash hopper at the bottom of the dust collector. The traditional method is that after the refining furnace has been running for a period of time and then shut down, the ash hopper is manually moved away from the dust collector body and emptied, or the ash is manually shoveled out from the ash hopper through the ash shovel opening on the side wall of the ash hopper.

[0004] If the production cycle is too long or maintenance and repair are not timely, and dust is not dealt with in time, the dust silo will become too full. This will cause the dust in the silo to be sucked into the vacuum pump system when the dust collector is in use, causing pump set failure and affecting production.

[0005] Using powered conveying for ash disposal allows for the timely removal of dust from the ash silo. Several steel mills in China have tried different forms of powered conveying for ash disposal, but for various reasons, the results have not been ideal.

[0006] To address the aforementioned issues, we propose a pneumatic ash conveying system for vacuum baghouse dust collectors. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide a pneumatic ash conveying system for vacuum bag dust collectors, which is used in steel degassing equipment (including VD, VOD and RH). The advantage of this utility model is that it can smoothly convey ash without affecting the normal operation of the dust collector under vacuum conditions.

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0009] A pneumatic ash conveying system for a vacuum bag filter dust collector includes an ash hopper for the vacuum bag filter dust collector, and further includes:

[0010] The ash hopper includes a manual feed valve, an automatic feed valve, an ash hopper, and a level gauge. The bottom of the ash hopper is connected to a manual feed valve, which is then connected downwards to an automatic feed valve. The automatic feed valve is installed at the inlet of the ash hopper, and a level gauge is installed at the top of the ash hopper.

[0011] Multiple ash silos are connected in series via a pneumatic ash conveying device, and the discharge port of the ash silos is connected to the pneumatic ash conveying device.

[0012] As an improvement, the manual feed valve and the automatic feed valve are connected by an expansion joint to compensate for minor deviations in the positioning of the ash hopper.

[0013] As an improvement, a fluidization chamber is also included, installed at the bottom of the ash hopper outlet.

[0014] As an improvement, an inspection handhole is also provided at the bottom of the ash hopper. When the pneumatic ash conveying system fails, the dust in the ash storage hopper can be manually discharged, or the ash discharge status can be checked periodically.

[0015] As an improvement, the pneumatic ash conveying device transports ash from the ash silo to the suction and pressure conveying vehicle. The outlet of the ash conveying pipe of the pneumatic ash conveying device is equipped with a quick-connect male connector, which can be connected to the quick-connect female connector on the hose of the suction and pressure conveying vehicle.

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] In use, multiple ash hoppers are connected in series by a pneumatic ash conveying device. The outlet of the ash hopper is connected to the pneumatic ash conveying device, which transports the ash in the ash hopper to the suction and pressure conveying vehicle, thus enabling smooth ash conveying without affecting the normal operation of the dust collector under vacuum conditions. Attached Figure Description

[0018] Figure 1 This is a diagram showing the usage state of this utility model.

[0019] Figure 2 This is the utility model Figure 1 A partial structural diagram.

[0020] Figure 3 This is a flowchart of the workflow of this utility model.

[0021] As shown in the figure: 1. Manual feed valve; 2. Expansion joint; 3. Automatic feed valve; 4. Ash hopper; 5. Fluidization chamber; 6. Level gauge; 7. Pneumatic ash conveying device; 8. Ash hopper; 9. Inspection manhole; 10. Suction and pressure conveying vehicle. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and 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 of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] A pneumatic ash conveying system for a vacuum bag filter dust collector includes an ash hopper 8, a manual feed valve 1, an automatic feed valve 3, an ash bin 4, a level gauge 6, and a fluidization chamber 5. Specifically: the bottom of the ash hopper 8 is connected to the manual feed valve 1, which is further connected downwards to the automatic feed valve 3. The automatic feed valve 3 is installed at the inlet of the ash bin 4. The manual feed valve 1 and the automatic feed valve 3 are connected by an expansion joint 2. A level gauge 6 is also installed at the top of the ash bin 4 for alarming when the material level exceeds the limit. The fluidization chamber 5 is installed at the bottom of the outlet of the ash bin 4. An inspection manhole 9 is also provided at the bottom of the bin 4.

[0025] Multiple ash silos 4 are connected in series by a pneumatic ash conveying device 7. The discharge port of the ash silos 4 is connected to the pneumatic ash conveying device 7, and the pneumatic ash conveying device 7 conveys the ash in the ash silos 4 to the suction and pressure conveying vehicle 10.

[0026] It is worth mentioning that the automatic feed valve 3 can ensure zero leakage between the dust collector and the ash hopper 4; when the ash is not conveyed by pneumatic means, the ash conveying pipeline can ensure zero leakage between the ash hopper 4 and the outside world.

[0027] In this embodiment, the pneumatic dust conveying system is responsible for collecting the dust from the vacuum filter dust collector and periodically discharging it into a vacuum suction vehicle. The pneumatic conveying system is controlled by a PLC system and can be operated manually or automatically.

[0028] The electrical control method of the pneumatic ash conveying system provided by this utility model is as follows:

[0029] 1. When no ash is being fed, the feed ball valve is normally open, and the dust collected by the dust collector falls into the ash hopper 4. When the level gauge 6 corresponding to the ash hopper 4 is triggered, the feed ball valve of the ash hopper 4 is closed.

[0030] 2. After the suction and pressure conveyor 10 is connected, start the ash conveying program: confirm that all ash inlet ball valves are closed. If they are not closed, close them. If they cannot be closed, an alarm will sound and manual intervention will be required.

[0031] 3. When the air source pressure is higher than the set lower limit of the air source pressure, the conveying program enters the start program. Secondary air intake (fluidizing gas) is turned on, tertiary air intake is turned on, and primary air intake is turned on. When the pressure in ash hopper 4 reaches the pressure to open the discharge valve, the discharge valve is opened. At this time, the dust and compressed nitrogen mixture enter the suction and pressure conveying vehicle 10 together, and the pressure is rising. When the pressure reaches the pressure to open the booster valve, the booster valve is opened.

[0032] 4. When the pressure is lower than the pressure of the booster valve, close the booster valve. When the pressure drops to the lower pressure limit, continue purging for 10-15 seconds, close the primary air inlet valve, close the secondary air inlet valve, close the tertiary air inlet valve, delay for 5-8 seconds, close the discharge valve, and after the discharge valve is closed, open the feed ball valve to start feeding and proceed to the next process.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A pneumatic ash conveying system for a vacuum bag filter, comprising an ash hopper (8) of a vacuum bag filter, characterized in that, Also include: The manual feed valve (1), automatic feed valve (3), ash bin (4) and level gauge (6); the ash bucket (8) bottom is connected with manual feed valve (1), manual feed valve (1) continues to connect automatic feed valve (3) downward, and automatic feed valve (3) is installed on the feed port of ash bin (4), and ash bin (4) top is also provided with level gauge (6); A plurality of ash bin (4) are connected together through pneumatic ash conveying device (7), and the discharge port of ash bin (4) is connected with pneumatic ash conveying device (7).

2. A pneumatic ash conveying system for a vacuum bag filter duster according to claim 1, characterized in that: The manual feed valve (1) and automatic feed valve (3) are connected through expansion joint (2).

3. A pneumatic ash conveying system for a vacuum bag filter duster according to claim 1, characterized in that: Also include fluidized bed (5), installed in the bottom of ash bin (4) discharge port.

4. A pneumatic ash conveying system for a vacuum bag filter duster according to claim 1, characterized in that: The ash bin (4) bottom is also provided with inspection hand hole (9).

5. The pneumatic ash conveying system for a vacuum bag filter dust collector according to claim 1, characterized in that: The pneumatic ash conveying device (7) conveys the ash in the ash bin (4) to the suction pressure car (10).

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