Iron notch dust removal device

Abstract

The utility model discloses an iron notch dust removal device which comprises a top suction cover body, a dust removal pipeline, a dry dust remover, a flue gas pipeline, an ash tank, a first ash conveying pipeline, a second ash conveying pipeline and a sewage disposal joint, a first filter screen is installed on the top suction cover body, and the top suction cover body, the dust removal pipeline and the dry dust remover are sequentially connected. A dust removal fan is mounted on the dust removal pipeline, the flue gas pipeline is communicated with the upper part of the dry dust remover, and the bottom of the dry dust remover, the first ash conveying pipeline, the ash tank and the second ash conveying pipeline are sequentially communicated; the sewage disposal joint is detachably mounted on the second ash conveying pipeline, and a second filter screen is mounted in the sewage disposal joint. According to the iron notch dust removal device disclosed by the utility model, the first filter screen on the top suction cover body and the second filter screen in the dirt removal joint can form twice filtration, so that the blockage of equipment is effectively prevented, and the stable operation of the equipment is greatly ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of iron-making blast furnaces, in particular to a taphole dust removal device. Background Art

[0002] The smoke and dust emitted during tapping of the blast furnace are one of the main pollution sources in the steel plant. To reduce related pollution, a dust removal device is usually installed at the blast furnace taphole, and the taphole dust removal remains open throughout the tapping process. The dust removal device mainly includes a dust removal fan and a dry dust collector. The smoke and dust emitted during tapping of the blast furnace are sucked into the dust removal pipeline by the dust removal fan to remove the smoke and dust emitted during tapping of the blast furnace. The smoke and dust sucked into the dust removal pipeline are sent to the dry dust collector, and the flue gas and dust are separated by the dry dust collector. The separated flue gas is discharged through the flue gas pipeline, and the dust is discharged through the ash conveying pipe. To ensure no dust flying, the suction force of the dust removal fan is very large, and often some sundries such as workers' gloves, rags, woven bags, etc. are sucked into the dust removal pipeline. After these sundries enter the dry dust collector, they will block the ash discharge port of the dry dust collector at least, and in serious cases, they will even block the ash conveying pipe, resulting in the need for manual cleaning of the ash discharge port and the ash conveying pipe of the dry dust collector. However, the cleaning is time-consuming and laborious, and the ash conveying pipe, as a long encapsulated pipeline, is extremely difficult to clean. Content of the Utility Model

[0003] The purpose of the utility model is to provide a taphole dust removal device.

[0004] The technical solution for realizing the purpose of the utility model is: a taphole dust removal device, including a top suction hood body, a dust removal pipeline, a dry dust collector, a flue gas pipeline, an ash tank, a first ash conveying pipeline, a second ash conveying pipeline and a cleaning and sewage section. The top suction hood body is in a horn shape, the top suction hood body has a flared opening and a reduced opening, the diameter of the flared opening is larger than that of the reduced opening, the flared opening faces downward, and a first filter screen is installed on the flared opening. One end of the dust removal pipeline is communicated with the reduced opening of the top suction hood body, and the other end of the dust removal pipeline is communicated with the inlet of the dry dust collector. A dust removal fan is installed on the dust removal pipeline. The flue gas pipeline is communicated with the upper part of the dry dust collector. One end of the first ash conveying pipeline is communicated with the bottom of the dry dust collector, and the other end of the first ash conveying pipeline is communicated with the upper part of the ash tank. The second ash conveying pipeline is communicated with the bottom of the ash tank, and a solenoid valve is further installed at the bottom of the ash tank. The cleaning and sewage section is in a cylindrical structure, the diameter of the cleaning and sewage section is larger than that of the second ash conveying pipeline, the cleaning and sewage section is detachably installed on the second ash conveying pipeline, and a second filter screen is installed in the cleaning and sewage section.

[0005] Further, both pressure interfaces of a pressure transmitter are connected to the second ash conveying pipeline, and the two pressure interfaces of the pressure transmitter are respectively located on both sides of the cleaning section. The pressure transmitter real-time detects the pressure difference at both ends of the cleaning section. According to the pressure difference at both ends of the cleaning section detected by the pressure transmitter, it is convenient to judge whether the cleaning section is blocked and whether the cleaning section needs to be disassembled and cleaned. If the pressure difference at both ends of the cleaning section detected by the pressure transmitter is large, it is judged that the cleaning section is blocked and the cleaning section needs to be disassembled and cleaned.

[0006] Further, the pressure transmitter and the solenoid valve are both electrically connected to a control unit respectively. The pressure transmitter real-time detects the pressure difference at both ends of the cleaning section and transmits the detected pressure difference to the control unit. The control unit controls the solenoid valve according to the pressure difference real-time detected by the pressure transmitter. If the pressure difference real-time detected by the pressure transmitter is large and it is judged that the cleaning section is blocked and the cleaning section needs to be disassembled and cleaned, the control unit controls the solenoid valve to close, and then it is convenient to disassemble and clean the cleaning section. The setting of the control unit facilitates the implementation of interlock control and automatic management.

[0007] Further, the control unit is an MCU controller or a PLC controller.

[0008] Further, the control unit is also electrically connected to an alarm device. When the pressure difference real-time detected by the pressure transmitter is large and it is judged that the cleaning section is blocked and the cleaning section needs to be disassembled and cleaned, while the control unit controls the solenoid valve to close, it also controls the alarm device to send an alarm signal to notify the operator to disassemble and clean the cleaning section.

[0009] Further, the alarm device is an alarm bell or an alarm light.

[0010] Further, the mesh number of the first filter screen is smaller than that of the second filter screen. The second filter screen is denser than the first filter screen, which is convenient for first filtering large debris in the soot through the first filter screen, and then filtering the dust conveyed in the cleaning section through the second filter screen twice. The two-stage filtering can greatly reduce the debris in the dust and prevent the subsequent ash conveying pipeline from being blocked.

[0011] Further, the second filter screen is located on the side of the cleaning section away from the ash tank. This setting enables the cleaning section to provide a larger collection space for the intercepted debris.

[0012] Further, the cleaning section is detachably installed on the second ash conveying pipeline through a flange.

[0013] The dust removal device for the taphole of the utility model installs the first filter screen on the flared opening of the top suction hood body, so that sundries such as workers' gloves, rags, and woven bags sucked together with the soot can be intercepted by the first filter screen. The first filter screen can filter the inhaled soot, preventing large-volume sundries from entering the dust removal device for the taphole and causing blockage of the dust removal device for the taphole.

[0014] For the dust removal device for the taphole of the utility model, the cleaning section is installed on the second ash conveying pipeline. First, the diameter of the cleaning section is larger than that of the second ash conveying pipeline, and the space inside the cleaning section is relatively large. When a small amount of sundries appear in the second ash conveying pipeline for a short time, due to the presence of the sundries, the conveying pressure in the second ash conveying pipeline is large. Under this large conveying pressure, the sundries are easily conveyed into the cleaning section. After entering the cleaning section, the space suddenly becomes larger, and the conveying pressure in the cleaning section is small. Large sundries are easily retained in the cleaning section, providing conditions for the collection of sundries. Second, a second filter screen is installed in the cleaning section for collecting sundries to intercept the sundries entering the cleaning section and prevent the sundries from entering the subsequent second ash conveying pipeline and causing blockage to the subsequent second ash conveying pipeline. Finally, when sundries in the dust can be filtered out, while setting the ash tank and the solenoid valve, the cleaning section is detachably installed. When the cleaning section needs to be disassembled and cleaned, the solenoid valve can be closed. The ash tank can temporarily store the dust, and the cleaning section can be detachably cleaned, providing conditions for removing the sundries in the cleaning section and on the second filter screen. For the dust removal device for the taphole of the utility model, through the cleaning section and the second filter screen therein, the sundries in the second ash conveying pipeline are filtered and collected, and then the sundries are discharged through the disassembly and cleaning of the cleaning section. This setting can effectively clean the sundries in the dust in the second ash conveying pipeline and prevent blockage in the second ash conveying pipeline.

[0015] For the dust removal device for the taphole of the utility model, the first filter screen on the top suction hood body and the second filter screen in the cleaning section can form two-stage filtering, intercepting the sundries in the soot and dust respectively. It can ensure that sundries such as workers' gloves, rags, and woven bags sucked together with the soot can be intercepted outside the dust removal device for the taphole and will not enter the dust removal device for the taphole. Even if relatively small sundries enter the dust removal device for the taphole, they can also be filtered out in the cleaning section, and the sundries will not enter the subsequent second ash conveying pipeline and cause blockage to the second ash conveying pipeline. For the dust removal device for the taphole of the utility model, through two-stage filtering successively, it can effectively prevent equipment blockage and greatly ensure the stable operation of the equipment. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the dust removal device for the taphole of the utility model;

[0017] Figure 2 It is the control structure diagram of the taphole dust removal device of the present utility model. Specific embodiments

[0018] The following will make a detailed description of the preferred embodiments of the taphole dust removal device of the present utility model in conjunction with the accompanying drawings:

[0019] As Figure 1 shown, a taphole dust removal device includes a top suction hood body 1, a dust removal pipeline 2, a dry dust collector 3, a flue gas pipeline 4, a dust bin 5, a first ash conveying pipeline 61, a second ash conveying pipeline 62 and a cleaning section 7. The top suction hood body 1 is in a horn shape, and the top suction hood body 1 has a flared opening 11 and a reduced opening 12. The diameter of the flared opening 11 is larger than that of the reduced opening 12. The flared opening 11 faces downward, and a first filter screen 101 is installed on the flared opening 11. One end of the dust removal pipeline 2 is communicated with the reduced opening 12 of the top suction hood body 1, and the other end of the dust removal pipeline 2 is communicated with the inlet of the dry dust collector 3. A dust removal fan 8 is installed on the dust removal pipeline 2. The flue gas pipeline 4 is communicated with the upper part of the dry dust collector 3. One end of the first ash conveying pipeline 61 is communicated with the bottom of the dry dust collector 3, and the other end of the first ash conveying pipeline 61 is communicated with the upper part of the dust bin 5. The second ash conveying pipeline 62 is communicated with the bottom of the dust bin 5, and a solenoid valve 51 is also installed at the bottom of the dust bin 5. The cleaning section 7 is in a cylindrical structure, the diameter of the cleaning section 7 is larger than that of the second ash conveying pipeline 62, the cleaning section 7 is detachably installed on the second ash conveying pipeline 62, and a second filter screen 102 is installed in the cleaning section 7.

[0020] For the taphole dust removal device of the present utility model, while the top suction hood body 1 serves as a suction nozzle, its horn shape is used to expand the area of sucking smoke and dust; the dust removal fan 8 provides power for sucking the smoke and dust; the dry dust collector 3 is used for separating flue gas and dust; the dust bin 5 is used for temporarily storing dust; the first filter screen 101 and the second filter screen 102 are used for intercepting sundries; the cleaning section 7 is used for temporarily storing the sundries entering the second ash conveying pipeline 62.

[0021] The dust removal device for the taphole of the utility model, wherein the top suction hood 1 is installed at the taphole of the blast furnace. During use, the dust removal fan 8 is turned on. Under the power action of the dust removal fan 8, the soot at the taphole of the blast furnace is sucked into the dust removal pipeline 2 by the top suction hood 1. During the process that the soot is sucked into the dust removal pipeline 2 by the top suction hood 1, the first filter screen 101 intercepts the sundries in the soot. The soot entering the dust removal pipeline 2 enters the dry dust collector 3 along the dust removal pipeline 2. The dry dust collector 3 separates the flue gas and dust entering it. The separated flue gas enters the flue gas pipeline 4 from the upper part of the dry dust collector 3 and is discharged along the flue gas pipeline 4. The separated dust enters the first ash conveying pipeline 61 from the bottom of the dry dust collector 3 and enters the ash tank 5 along the first ash conveying pipeline 61. Then it is discharged along the second ash conveying pipeline 62. During the process that the dust is discharged along the second ash conveying pipeline 62, the dust entering the cleaning and sewage section 7 is filtered by the second filter screen 102, and the sundries in the dust are intercepted in the cleaning and sewage section 7.

[0022] For the dust removal device for the taphole of the utility model, after the sundries are sucked onto the first filter screen 101, they can be directly removed manually. After the sundries in the dust in the second ash conveying pipeline 62 are intercepted by the second filter screen 102, the cleaning and sewage section 7 is disassembled, and the sundries on the cleaning and sewage section 7 and the second filter screen 102 therein are cleaned. When disassembling and cleaning the cleaning and sewage section 7, first close the solenoid valve 51 at the bottom of the ash tank 5 to allow the ash tank 5 to temporarily store the input dust, and then the cleaning and sewage section 7 can be disassembled.

[0023] For the dust removal device for the taphole of the utility model, by installing the first filter screen 101 on the flared opening 11 of the top suction hood 1, sundries such as workers' gloves, rags, woven bags, etc. that are sucked together with the soot can be intercepted by the first filter screen 101. The first filter screen 101 can filter the sucked soot to prevent large-volume sundries from entering the dust removal device for the taphole and causing blockage of the dust removal device for the taphole.

[0024] The dust removal device for the taphole of the utility model, the cleaning and dirt removal section 7 is installed on the second ash conveying pipeline 62. First of all, the diameter of the cleaning and dirt removal section 7 is larger than that of the second ash conveying pipeline 62, and the space inside the cleaning and dirt removal section 7 is relatively large. When a small amount of sundries appear in the second ash conveying pipeline 62 in a short time, due to the existence of the sundries, the conveying pressure in the second ash conveying pipeline 62 is large. Under this large conveying pressure, the sundries are easily conveyed into the cleaning and dirt removal section 7. After entering the cleaning and dirt removal section 7, the space suddenly becomes larger, and the conveying pressure in the cleaning and dirt removal section 7 is small. The large sundries are easily retained in the cleaning and dirt removal section 7, which provides conditions for the collection of sundries. Secondly, the second filter screen 102 is installed in the cleaning and dirt removal section 7 for collecting sundries. The sundries entering the cleaning and dirt removal section 7 are intercepted by the second filter screen 102 to prevent the sundries from entering the subsequent second ash conveying pipeline 62 and causing blockage to the subsequent second ash conveying pipeline 62. Finally, when the sundries in the dust can be filtered out, while the ash tank 5 and the electromagnetic valve 51 are set, the cleaning and dirt removal section 7 is detachably installed. When the cleaning and dirt removal section 7 needs to be disassembled and cleaned, the electromagnetic valve 51 can be closed. The ash tank 5 can temporarily store the dust, and the cleaning and dirt removal section 7 can be detachably cleaned, which provides conditions for removing the sundries in the cleaning and dirt removal section 7 and on the second filter screen 102. The dust removal device for the taphole of the utility model filters and collects the sundries in the second ash conveying pipeline 62 through the cleaning and dirt removal section 7 and the second filter screen 102 therein, and then discharges the sundries through the disassembly and cleaning of the cleaning and dirt removal section 7. This setting can effectively clean the sundries in the dust in the second ash conveying pipeline 62 and prevent blockage in the second ash conveying pipeline 62.

[0025] The dust removal device for the taphole of the utility model, the first filter screen 101 on the top suction hood body 1 and the second filter screen 102 in the cleaning and dirt removal section 7 can form two - stage filtration, intercepting the sundries in the smoke and dust and dust respectively. It can ensure that the sundries sucked together with the smoke and dust, such as workers' gloves, rags, woven bags, etc., can be intercepted outside the dust removal device for the taphole and will not enter the dust removal device for the taphole. Even if the relatively small - sized sundries enter the dust removal device for the taphole, they can also be filtered out in the cleaning and dirt removal section 7, and the sundries will not enter the subsequent second ash conveying pipeline 62 and cause blockage to the second ash conveying pipeline 62. The dust removal device for the taphole of the utility model has two - stage filtration successively, which can effectively prevent equipment blockage and greatly ensure the stable operation of the equipment.

[0026] The dust removal device for the taphole of the present utility model. Preferably, both pressure interfaces of a pressure transmitter 91 are connected to the second ash conveying pipe 62, and the two pressure interfaces of the pressure transmitter 9 are respectively located on both sides of the cleaning and sewage section 7. The pressure transmitter 91 detects the pressure difference at both ends of the cleaning and sewage section 7 in real time. According to the pressure difference at both ends of the cleaning and sewage section 7 detected by the pressure transmitter 91, it is convenient to judge whether the cleaning and sewage section 7 is blocked and whether the cleaning and sewage section 7 needs to be disassembled and cleaned. If the pressure difference at both ends of the cleaning and sewage section 7 detected by the pressure transmitter 91 is large, it is judged that the cleaning and sewage section 7 is blocked and the cleaning and sewage section 7 needs to be disassembled and cleaned.

[0027] The dust removal device for the taphole of the present utility model. Preferably, as Figure 2 shown, the pressure transmitter 91 and the solenoid valve 51 are respectively electrically connected to a control unit 92. The pressure transmitter 91 detects the pressure difference at both ends of the cleaning and sewage section 7 in real time and transmits the detected pressure difference to the control unit 92. The control unit 92 controls the solenoid valve 51 according to the pressure difference detected by the pressure transmitter 91 in real time. If the pressure difference detected by the pressure transmitter 91 in real time is large and it is judged that the cleaning and sewage section 7 is blocked and the cleaning and sewage section 7 needs to be disassembled and cleaned, the control unit 92 controls the solenoid valve 51 to close, and then it is convenient to disassemble and clean the cleaning and sewage section 7. The setting of the control unit 92 facilitates the realization of interlock control and automatic management.

[0028] For the dust removal device for the taphole of the present utility model, the control unit 92 is an MCU controller or a PLC controller.

[0029] The dust removal device for the taphole of the present utility model. Preferably, the control unit 92 is also electrically connected to an alarm device 93. When the pressure difference detected by the pressure transmitter 91 in real time is large and it is judged that the cleaning and sewage section 7 is blocked and the cleaning and sewage section 7 needs to be disassembled and cleaned, while the control unit 92 controls the solenoid valve 51 to close, it also controls the alarm device 93 to send an alarm signal to notify the operator to disassemble and clean the cleaning and sewage section 7.

[0030] For the dust removal device for the taphole of the present utility model, the alarm device 93 is an alarm bell or an alarm light.

[0031] The dust removal device for the taphole of the present utility model. Preferably, the mesh number of the first filter screen 101 is less than the number of the second filter screen 102. The second filter screen 102 is denser than the first filter screen 101, which is convenient for first filtering large sundries in the smoke and dust through the first filter screen 101, and then filtering the dust conveyed in the cleaning and sewage section 7 through the second filter screen 102 twice. Through the two - stage filtering, the sundries in the dust can be greatly reduced, preventing the blockage of the subsequent ash conveying pipe.

[0032] The dust removal device for the taphole of the utility model, preferably, the second filter screen 102 is located at one end side of the cleaning and dirt removal section 7 away from the ash tank 5. This setting enables the cleaning and dirt removal section 7 to provide a larger collection space for the intercepted sundries.

[0033] The dust removal device for the taphole of the utility model, preferably, the cleaning and dirt removal section 7 is detachably installed on the second ash conveying pipeline 62 through a flange.

[0034] For those of ordinary skill in the technical field to which the utility model pertains, without departing from the concept of the utility model, several simple deductions or substitutions can still be made, and all should be regarded as falling within the protection scope of the utility model.

Claims

1. An iron notch dust removal device, characterized in that: It includes a top suction hood body, a dust removal pipeline, a dry dust collector, a flue gas pipeline, an ash tank, a first ash conveying pipeline, a second ash conveying pipeline and a cleaning section. The top suction hood body is in a horn shape, having a flared opening and a constricted opening. The diameter of the flared opening is larger than that of the constricted opening, and the flared opening faces downward. A first filter screen is installed on the flared opening. One end of the dust removal pipeline is communicated with the constricted opening of the top suction hood body, and the other end of the dust removal pipeline is communicated with the inlet of the dry dust collector. A dust removal fan is installed on the dust removal pipeline. The flue gas pipeline is communicated with the upper part of the dry dust collector. One end of the first ash conveying pipeline is communicated with the bottom of the dry dust collector, and the other end of the first ash conveying pipeline is communicated with the upper part of the ash tank. The second ash conveying pipeline is communicated with the bottom of the ash tank, and a solenoid valve is also installed at the bottom of the ash tank. The cleaning section is in a cylindrical structure, and the diameter of the cleaning section is larger than that of the second ash conveying pipeline. The cleaning section is detachably installed on the second ash conveying pipeline, and a second filter screen is installed inside the cleaning section.

2. The taphole dedusting device according to claim 1, characterized in that: Both pressure interfaces of a pressure transmitter are connected to the second ash conveying pipeline, and the two pressure interfaces of the pressure transmitter are respectively located on both sides of the cleaning section.

3. The tapping hole dedusting device according to claim 2, characterized in that: The pressure transmitter and the solenoid valve are respectively electrically connected to a control unit.

4. The taphole dedusting device according to claim 3, characterized in that: The control unit is an MCU controller or a PLC controller.

5. The taphole dedusting device according to claim 3, characterized in that: The control unit is also electrically connected to an alarm device.

6. The tapping hole dedusting device according to claim 5, characterized in that: The alarm device is an alarm bell or an alarm light.

7. The taphole dedusting device according to claim 1, characterized in that: The mesh number of the first filter screen is less than that of the second filter screen.

8. The taphole dedusting device according to claim 1, characterized in that: The second filter screen is located on the side of the cleaning section away from the ash tank.

9. The taphole dedusting device according to claim 1, characterized in that: The cleaning section is detachably installed on the second ash conveying pipeline through a flange.

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