Anti-blocking device for slag sluice of granulation tower

Abstract

The utility model discloses an anti-blocking device for a slag sluice of a granulation tower, which comprises the granulation tower and the slag sluice, a high-pressure water pipe is arranged at one end of the slag sluice far away from the granulation tower, a switch valve is mounted on the high-pressure water pipe, a first pressure transmitter and a second pressure transmitter are mounted in the high-pressure water pipe, and the first pressure transmitter and the second pressure transmitter are connected with the switch valve. An anti-blocking water pipe is communicated with the end part of the high-pressure water pipe; and a pneumatic valve and a manual valve are mounted on the anti-blocking water pipe. According to the anti-blocking device for the slag sluice of the granulation tower, the first pressure transmitter and the second pressure transmitter detect the water pressure in the high-pressure water pipe in real time, and when it is judged that the water outlet of the high-pressure water pipe breaks down according to the detected water pressure signal in the high-pressure water pipe, high-pressure water is output from the anti-blocking water pipe, and the slag sluice of the granulation tower is blocked. The high-pressure water pipe provides power for slag output in the slag sluice, the slag in the slag sluice cannot be blocked due to water outlet faults of the high-pressure water pipe, and the problems of production safety and production efficiency caused by slag blocking in the slag sluice are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of iron-making blast furnaces, in particular to a granulating tower slag flushing ditch anti-blocking device. Background Art

[0002] The products of the reduction reaction in the iron-making blast furnace are molten iron and slag. The molten iron enters the molten iron tank through the iron-outlet ditch in front of the furnace, and the slag enters the slag flushing ditch through the slag skimmer. The top of the slag flushing ditch is equipped with a high-pressure water pipe, which discharges high-pressure water. The high-pressure water impacts the slag in the slag flushing ditch, so that the slag entering the slag flushing ditch is transported along the slag flushing ditch under the impact power of the high-pressure water discharged by the water pipe, and is brought into the slag flushing pool of the granulation tower. High-pressure water is used as the conveying power for the slag in the slag flushing ditch. During the iron-out process of the blast furnace, once the slag flushing ditch is shut down for various reasons, the slag that comes out with the molten iron will slowly accumulate and block the inlet and outlet of the slag flushing ditch and the granulation tower. The temperature of the molten iron and slag is about 1500℃. When the inlet and outlet of the slag flushing ditch and the granulation tower are blocked, the high-temperature accumulated slag will constitute a dangerous factor, causing the risk of high-temperature scalding to the on-site staff; and when it is difficult to approach, it takes a long time to clean and dredge, which is easy to affect the normal iron-out of the blast furnace. Utility Model Content

[0003] The utility model aims to provide a device for preventing blocking of a slag flushing ditch of a granulating tower.

[0004] The technical solution for achieving the purpose of the utility model is: a granulation tower slag flushing ditch anti-blocking device, comprising a granulation tower and a slag flushing ditch, the granulation tower is located at one end of the slag flushing ditch and is connected to the slag flushing ditch, a high-pressure water pipe is provided at the end of the slag flushing ditch away from the granulation tower, a duckbill-shaped nozzle facing the granulation tower is installed at the end of the high-pressure water pipe, a switch valve is installed on the high-pressure water pipe, a first pressure transmitter and a second pressure transmitter are installed in the high-pressure water pipe, the first pressure transmitter and the second pressure transmitter are respectively located on both sides of the switch valve, an anti-blocking water pipe is connected to the end of the high-pressure water pipe, a pneumatic valve and a manual valve are installed on the anti-blocking water pipe, and the switch valve, the first pressure transmitter, the second pressure transmitter and the pneumatic valve are respectively electrically connected to a control unit.

[0005] Furthermore, both lateral ends of the duckbill nozzle are close to the inner wall of the slag flushing groove.

[0006] Furthermore, the control unit is a PLC controller or an MCU controller.

[0007] The utility model discloses a granulating tower slag flushing ditch anti-blocking device, on the one hand, by connecting the anti-blocking water pipe at the end of the high-pressure water pipe, and at the same time, installing the first pressure transmitter and the second pressure transmitter in the high-pressure water pipe, so that the first pressure transmitter and the second pressure transmitter can detect the water pressure in the high-pressure water pipe in real time, and when it is judged that the high-pressure water pipe has a water discharge failure according to the water pressure signal detected in the high-pressure water pipe, the pneumatic valve on the anti-blocking water pipe can be opened, and the anti-blocking water pipe can output high-pressure water to provide power for the slag output in the slag flushing ditch, so as to facilitate The slag in the slag flushing ditch can continue to be transported, and the slag in the slag flushing ditch will not be blocked due to the water outlet failure of the high-pressure water pipe, thereby avoiding the blockage of slag in the slag flushing ditch and causing production safety and production efficiency problems; on the other hand, by respectively installing the first pressure transmitter and the second pressure transmitter on both sides of the switch valve, the first pressure transmitter and the second pressure transmitter can detect the water pressure signal in the high-pressure water pipe, and the fault problem can be specifically judged, so that according to the specific fault problem, targeted and rapid maintenance can be carried out, thereby improving the convenience and efficiency of maintenance.

[0008] In addition, the utility model granulating tower slag flushing ditch anti-blocking device also installs the duckbill nozzle at the end of the high-pressure water pipe, so that under the guidance of the duckbill nozzle, the high-pressure water sprayed by the duckbill nozzle can be flattened, and the flattened high-pressure water has a larger water outlet width. When impacting the slag in the slag flushing ditch, the lateral range that can be impacted is wider, and the slag in the slag flushing ditch can be flushed out of the slag flushing ditch, so as to avoid the high-pressure water output by the high-pressure water pipe failing to flush the slag on the side of the slag flushing ditch out of the slag in the slag flushing ditch due to too narrow impact range, thereby preventing the slag on the side of the slag flushing ditch from being retained, and the output of the slag in the slag flushing ditch from being unclean. In other words, the setting of the duckbill nozzle can make the output of the slag in the slag flushing ditch cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a granulating tower slag flushing ditch anti-blocking device of the utility model;

[0010] Figure 2 It is a schematic diagram of the control structure of the granulating tower slag flushing ditch anti-blocking device of the utility model. DETAILED DESCRIPTION

[0011] The following is a detailed description of the preferred embodiment of the granulating tower slag flushing ditch anti-blocking device of the utility model in conjunction with the accompanying drawings:

[0012] like Figure 1 and Figure 2As shown, a granulating tower slag flushing ditch anti-blocking device comprises a granulating tower 1 and a slag flushing ditch 2, wherein the granulating tower 1 is located at one end of the slag flushing ditch 2 and is connected to the slag flushing ditch 2, and a high-pressure water pipe 3 is provided at one end of the slag flushing ditch 2 away from the granulating tower 1, and an end 31 of the high-pressure water pipe 3 is provided with a duckbill nozzle 4 facing the granulating tower 1, a switch valve 5 is installed on the high-pressure water pipe 3, and a first pressure transmitter 61 and a second pressure transmitter 62 are installed in the high-pressure water pipe 3, and the first pressure transmitter 61 and the second pressure transmitter 62 are respectively located on both sides of the switch valve 5, an anti-blocking water pipe 7 is connected to the end 31 of the high-pressure water pipe 3, and a pneumatic valve 81 and a manual valve 82 are installed on the anti-blocking water pipe 7, and the switch valve 5, the first pressure transmitter 61, the second pressure transmitter 62 and the pneumatic valve 81 are respectively electrically connected to a control unit 9.

[0013] The utility model discloses a granulating tower slag flushing ditch anti-blocking device, wherein the slag flushing ditch 2 is used as a conveying channel for slag produced by a blast furnace, one end of the slag flushing ditch 2 is connected to the granulating tower 1, and the granulating tower 1 has a slag flushing pool as a conveying destination of the slag flushing ditch 2. The high-pressure water pipe 3 outputs high-pressure water as a conveying power for the slag in the slag flushing ditch 2. The duckbill nozzle 4 is installed on the end 31 of the high-pressure water pipe 3 extending into the slag flushing ditch 2, the duckbill nozzle 4 is located in the slag flushing ditch 2 and faces the granulating tower 1, and the duckbill nozzle 4 guides the high-pressure water sprayed from the high-pressure water pipe 3. The switch valve 5 serves as a water outlet switch of the high-pressure water pipe 3. The first pressure transmitter 61 and the second pressure transmitter 62 are used to detect the water pressure in the high-pressure water pipe 3 in real time. The anti-blocking water pipe 7 is connected to the end 31 of the high-pressure water pipe 3. The first pressure transmitter 61, the switch valve 5, the second pressure transmitter 62 and the anti-blocking water pipe 7 are sequentially distributed along the conveying direction of the high-pressure water in the high-pressure water pipe 3. The anti-blocking water pipe 7 is used as a backup water pipe. When the high-pressure water pipe 3 fails, high-pressure water can be sprayed through the duckbill nozzle 4 to serve as the conveying power for the slag in the slag flushing ditch 2. The pneumatic valve 81 and the manual valve 82 are both used as the water outlet switch of the anti-blocking water pipe 7. The control unit 9 is the control center.

[0014] The utility model granulating tower slag flushing ditch anti-blocking device, when working normally, the pneumatic valve 81 on the anti-blocking water pipe 7 is closed, and the manual valve 82 is normally open; the switch valve 5 of the high-pressure water pipe 3 is opened, and the high-pressure water pipe 3 outputs high-pressure water, and the high-pressure water is sprayed out by the duckbill nozzle 4. After the slag produced by the blast furnace is output with the molten iron, it enters the slag flushing ditch 2 by the action of the slag skimmer. After entering the slag flushing ditch 2, the high-pressure water sprayed by the duckbill nozzle 4 impacts the slag in the slag flushing ditch 2. Under the impact power of the high-pressure water, the slag is transported along the slag flushing ditch 2 to the granulating tower 1. After the work is completed, the switch valve 5 can be closed.

[0015] In the utility model granulating tower slag flushing ditch blocking prevention device, the first pressure transmitter 61 and the second pressure transmitter 62 are used to detect the water pressure in the high-pressure water pipe 3 in real time. After the switch valve 5 is opened, the first pressure transmitter 61 and the second pressure transmitter 62 detect the water pressure signal in the high-pressure water pipe 3 in real time. After the switch valve 5 is opened, according to the water pressure signal in the high-pressure water pipe 3 detected by the first pressure transmitter 61 and the second pressure transmitter 62, it can be judged whether the water outlet of the high-pressure water pipe 3 is faulty. Specifically, when the water pressure signal in the high-pressure water pipe 3 detected by the first pressure transmitter 61 and the water pressure signal in the high-pressure water pipe 3 detected by the second pressure transmitter 62 are both higher than the set value, it means that the high-pressure water of the high-pressure water pipe 3 is not faulty; when any of the water pressure signals in the high-pressure water pipe 3 detected by the first pressure transmitter 61 and the water pressure signal in the high-pressure water pipe 3 detected by the second pressure transmitter 62 is lower than the set value, the control unit 9 judges that the water outlet of the high-pressure water pipe 3 is faulty.

[0016] According to the utility model, the granulating tower slag flushing ditch anti-blocking device is provided, when the control unit 9 determines that the water outlet of the high-pressure water pipe 3 fails, the control unit 9 controls the switch valve 5 to close, and at the same time, controls the pneumatic valve 81 to open, the high-pressure water outputted from the anti-blocking water pipe 7 enters the duckbill nozzle 4, and is sprayed out by the duckbill nozzle 4, providing power for the slag output in the slag flushing ditch 2, so that the slag in the slag flushing ditch 2 can continue to be transported, and the slag in the slag flushing ditch 2 will not be blocked due to lack of transporting power.

[0017] In the granulating tower slag flushing ditch anti-blocking device of the utility model, after the switch valve 5 is opened, when the control unit 9 determines that the water outlet of the high-pressure water pipe 3 is faulty, the first pressure transmitter 61 and the second pressure transmitter 62 detect the water pressure signal in the high-pressure water pipe 3, and the fault problem can be specifically determined. Specifically, when the water pressure signal detected by the first pressure transmitter 61 in the high-pressure water pipe 3 and the water pressure signal detected by the second pressure transmitter 62 in the high-pressure water pipe 3 are both lower than the set value, it means that the source of the high-pressure water in the high-pressure water pipe 3 is likely to be faulty; when the first pressure transmitter 61 detects that the water pressure signal in the high-pressure water pipe 3 is higher than the set value, and the second pressure transmitter 62 detects that the water pressure signal in the high-pressure water pipe 3 is lower than the set value, it means that the switch valve 5 is likely to be faulty; when the first pressure transmitter 61 detects that the water pressure signal in the high-pressure water pipe 3 is lower than the set value, and the second pressure transmitter 62 detects that the water pressure signal in the high-pressure water pipe 3 is higher than the set value, it means that at least one of the first pressure transmitter 61 and the second pressure transmitter 62 is likely to be faulty.

[0018] In the utility model granulating tower slag flushing ditch anti-blocking device, after the switch valve 5 is opened, the first pressure transmitter 61 and the second pressure transmitter 62 detect the water pressure signal in the high-pressure water pipe 3, and after determining the fault problem, the operator can quickly and specifically perform maintenance according to the fault problem. During maintenance, the manual valve 82 can be manually closed; after maintenance, the manual valve 82 can be manually opened.

[0019] The utility model provides a granulating tower slag flushing ditch anti-blocking device, on the one hand, by connecting the anti-blocking water pipe 7 to the end 31 of the high-pressure water pipe 3, and at the same time, installing the first pressure transmitter 61 and the second pressure transmitter 62 in the high-pressure water pipe 3, so that the first pressure transmitter 61 and the second pressure transmitter 62 can detect the water pressure in the high-pressure water pipe 3 in real time, and when it is judged that the high-pressure water pipe 3 has a water outlet failure according to the water pressure signal detected in the high-pressure water pipe 3, the pneumatic valve 81 on the anti-blocking water pipe 7 can be opened, and high-pressure water can be output from the anti-blocking water pipe 7 to provide power for the slag output in the slag flushing ditch 2, thereby preventing the slag from being discharged. So that the slag in the slag flushing ditch 2 can continue to be transported, the slag in the slag flushing ditch 2 will not be blocked due to the water outlet failure of the high-pressure water pipe 3, thereby avoiding the blockage of slag in the slag flushing ditch 2 and causing production safety and production efficiency problems; on the other hand, by installing the first pressure transmitter 61 and the second pressure transmitter 62 on both sides of the switch valve 5 respectively, the water pressure signal in the high-pressure water pipe 3 is detected by the first pressure transmitter 61 and the second pressure transmitter 62, and the fault problem can be specifically judged, so that according to the specific fault problem, targeted and rapid maintenance can be carried out, thereby improving the convenience and efficiency of maintenance.

[0020] In addition, the utility model granulating tower slag flushing ditch anti-blocking device also installs the duckbill nozzle 4 through the end 31 of the high-pressure water pipe 3, so that under the guiding action of the duckbill nozzle 4, the high-pressure water sprayed by the duckbill nozzle 4 can be flattened, and the flattened high-pressure water has a larger water outlet width. When impacting the slag in the slag flushing ditch 2, the lateral range that can be impacted is wider, and the slag in the slag flushing ditch 2 can be flushed out of the slag flushing ditch 2, so as to avoid the high-pressure water output by the high-pressure water pipe 3 failing to flush the slag on the side of the slag flushing ditch 2 out of the slag in the slag flushing ditch 2 due to the narrow impact range, thereby preventing the slag on the inner side of the slag flushing ditch 2 from being retained, and the output of the slag in the slag flushing ditch 2 is not clean. In other words, the setting of the duckbill nozzle 4 can make the output of the slag in the slag flushing ditch 2 cleaner.

[0021] In the granulating tower slag flushing ditch anti-blocking device of the utility model, preferably, both lateral ends of the duckbill nozzle 4 are close to the inner wall of the slag flushing ditch 2 .

[0022] In the granulating tower slag flushing ditch anti-blocking device of the utility model, the control unit 9 can be a PLC controller or an MCU controller.

[0023] The granulating tower slag flushing ditch anti-blocking device of the utility model, the switch valve 5, the first pressure transmitter 61, the second pressure transmitter 62, the pneumatic valve 81, the manual valve 82 and the control unit 9 are all existing structures, and the utility model will not elaborate on this.

[0024] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A granulation tower slag flushing ditch anti-blocking device, comprising a granulation tower and a slag flushing ditch, wherein the granulation tower is located at one end of the slag flushing ditch and is connected to the slag flushing ditch, and a high-pressure water pipe is provided at one end of the slag flushing ditch away from the granulation tower, characterized in that: A duckbill nozzle facing the granulation tower is installed at the end of the high-pressure water pipe, a switch valve is installed on the high-pressure water pipe, a first pressure transmitter and a second pressure transmitter are installed in the high-pressure water pipe, the first pressure transmitter and the second pressure transmitter are respectively located on both sides of the switch valve, an anti-blocking water pipe is connected to the end of the high-pressure water pipe, a pneumatic valve and a manual valve are installed on the anti-blocking water pipe, and the switch valve, the first pressure transmitter, the second pressure transmitter and the pneumatic valve are respectively electrically connected to a control unit.

2. The granulating tower slag flushing ditch anti-blocking device according to claim 1 is characterized by: The two lateral ends of the duckbill nozzle are close to the inner wall of the slag flushing groove.

3. The granulating tower slag flushing ditch anti-blocking device according to claim 1 is characterized by: The control unit is a PLC controller or an MCU controller.

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