Automatic slag breaking control device for improving converter gas recovery amount

Abstract

The utility model discloses an automatic slag breaking control device for improving the gas recovery amount of a converter, which comprises a pressure guide pipe, the pressure guide pipe is communicated with a converter mouth through a plurality of first connecting pipes, and one side, far away from the first connecting pipes, of the pressure guide pipe is communicated with a plurality of second connecting pipes corresponding to the first connecting pipes. The second connecting pipe is provided with a slag breaking mechanism used for piercing steel slag blocked in the pressure guiding pipe and the first connecting pipe, the second connecting pipe is provided with a purging assembly and a pressure measuring assembly, the slag breaking mechanism comprises an air cylinder, the air cylinder is arranged at the end, away from the pressure guiding pipe, of the second connecting pipe, and a piston rod of the air cylinder is fixedly connected with a poking needle; the slag breaking mechanism can effectively remove steel slag blocked in the first connecting pipe and the pressure drawing pipe, effectively prevents the furnace mouth micro-differential pressure measuring system from being blocked, ensures the reliability of micro-differential pressure measuring parameters, improves the safety and reliability of a converter dry method system, and improves the gas recovery amount.

Description

Technical Field

[0001] The utility model relates to the technical field of converters, in particular to an automatic controlled slag breaking device for improving the recovery amount of converter coal gas. Background Art

[0002] At present, the micro-differential pressure detection of the converter mouth for dry dust removal of converters is generally carried out by using a micro-differential pressure transmitter and nitrogen purge method.

[0003] Micro differential pressure transmitter and nitrogen purge method: a furnace mouth micro differential pressure transmitter pressure inlet is reserved in the second section of the converter vaporization and cooling flue. One of the micro differential pressure transmitter pressure inlet pipes is introduced into the vaporization and cooling zone flue, and the other is installed outside the vaporization and cooling flue and connected to the outdoor atmosphere. In order to prevent the furnace mouth micro differential pressure transmitter pressure inlet pipe from being blocked, a measuring solenoid valve is installed in the middle of the pressure inlet pipe that goes deep into the vaporization and cooling flue, and a purge solenoid valve is installed in front of the measuring solenoid valve. During normal blowing, the measuring solenoid valve is opened and the purge solenoid valve is closed. When steelmaking is finished, the measuring solenoid valve is closed and the purge solenoid valve is opened to purge the accumulated dust and impurities inside the pressure inlet pipe.

[0004] However, by using a micro differential pressure transmitter with nitrogen purge, the ash that is blocked in the pressure pipe can be purged in the early stage of operation. During the converter steelmaking process, liquid slag will enter the pressure pipe with the flue gas and accumulate. The cooled slag ash will adhere to the pressure pipe. When it reaches a certain level, it will still cause system blockage, resulting in the inability to measure or distortion of measurement parameters. The interlocking control program cannot obtain the true parameters of the furnace mouth micro differential pressure, which ultimately causes the control mode to fail.

[0005] Therefore, an automatic controlled slag breaking device for increasing converter gas recovery is proposed. Utility Model Content

[0006] The utility model aims to provide an automatic control slag breaking device for improving converter gas recovery, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] An automatic slag-breaking device for improving the recovery amount of converter gas comprises a pressure-inducing pipe, the pressure-inducing pipe is connected to a converter furnace port through a plurality of first connecting pipes, a side of the pressure-inducing pipe away from the first connecting pipe is connected to a plurality of second connecting pipes corresponding to the first connecting pipes, a slag-breaking mechanism for breaking the steel slag blocked inside the pressure-inducing pipe and inside the first connecting pipe is provided on the second connecting pipe, and a purge assembly and a pressure measuring assembly are provided on the second connecting pipe;

[0009] The slag breaking mechanism comprises a cylinder, which is arranged at one end of the second connecting pipe away from the pressure-inducing pipe, and a poking needle is fixedly connected to the piston rod of the cylinder.

[0010] In an automatic controlled slag breaking device for improving converter gas recovery according to the utility model, a pneumatic valve is installed on the second connecting pipe, and the poking needle can pass through the valve hole of the pneumatic valve after the pneumatic valve is opened.

[0011] In an automatic control slag breaking device for improving the recovery amount of converter gas according to the utility model, the purge assembly includes a third connecting pipe, one end of the third connecting pipe is connected to the second connecting pipe, and a three-way solenoid valve is installed on the other end of the third connecting pipe, and one of the connecting ports of the three-way solenoid valve is connected to the nitrogen delivery branch pipe, and the nitrogen delivery branch pipe is connected to the nitrogen source through the nitrogen delivery main pipe.

[0012] In an automatic control slag breaking device for improving converter gas recovery according to the utility model, the pressure measuring assembly includes a micro differential pressure transmitter, the high pressure measuring port of the micro differential pressure transmitter is connected to a pressure measuring main pipe, the pressure measuring main pipe is connected to another connecting port of the three-way solenoid valve through a pressure measuring branch pipe, and the low pressure measuring port of the micro differential pressure transmitter is connected to the atmosphere.

[0013] In an automatic control slag breaking device for improving converter gas recovery according to the utility model, a PLC controller is also included, and the solenoid valve for controlling the extension and retraction of the piston rod of the cylinder is controlled by the PLC controller.

[0014] In an automatic controlled slag breaking device for improving converter gas recovery according to the utility model, the three-way solenoid valve and the solenoid valve of the pneumatic valve are both controlled by the PLC controller.

[0015] The utility model has at least the following beneficial effects:

[0016] The utility model can effectively remove the steel slag blocked in the first connecting pipe and the pressure-inducing pipe by means of the slag breaking mechanism, effectively avoid the blockage of the furnace mouth micro-differential pressure measurement system, ensure the reliability of the micro-differential pressure measurement parameters, improve the safety and reliability of the converter dry process system, and increase the gas recovery volume;

[0017] By adopting multi-point measurement, the measured micro differential pressure at the furnace mouth is more accurate than the traditional single-point differential pressure measurement, and the input quantity of the mathematical model involved in the fan speed control is more accurate, thereby further improving the operating stability of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the automatic control slag breaking device for improving the converter gas recovery amount of the utility model;

[0020] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the utility model.

[0021] Description of Figure Numbers:

[0022] 1. Pressure-guiding pipe; 2. First connecting pipe; 3. Third connecting pipe; 4. Three-way solenoid valve; 5. Pressure measuring pipe; 6. Nitrogen delivery pipe; 7. Pneumatic valve; 8. Slag-breaking mechanism; 801. Cylinder; 802. Poke needle; 9. Second connecting pipe. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Please refer to Figure 1 to Figure 2 As shown, this embodiment provides an automatic controlled slag breaking device for improving the recovery amount of converter gas, including a pressure-conducting pipe 1 and a PLC controller, the pressure-conducting pipe 1, the pressure-conducting pipe 1 is connected to the converter furnace mouth through a plurality of first connecting pipes 2, the side of the pressure-conducting pipe 1 away from the first connecting pipe 2 is connected to a plurality of second connecting pipes 9 corresponding to the first connecting pipes 2, the second connecting pipes 9 are provided with a slag breaking mechanism for poking the steel slag blocked inside the pressure-conducting pipe 1 and the first connecting pipes 2, the slag breaking mechanism includes a cylinder 801, the cylinder 801 is arranged at one end of the second connecting pipe 9 away from the pressure-conducting pipe 1, a poking needle 802 is fixedly connected to the piston rod of the cylinder 801, and an electromagnetic valve for controlling the extension and retraction of the piston rod of the cylinder 801 is controlled by the PLC controller.

[0025] By adopting the above technical solution, when the fan is in the low-speed stage, the PLC controller controls the extension of the piston rod of the cylinder 801, thereby driving the piercing needle 802 to extend from the pressure-inducing pipe 1 into the first connecting pipe 2 to pierce the slag, and the pierced slag falls into the flue at the end of the converter.

[0026] In this embodiment, a purge assembly and a pressure measuring assembly are provided on the second connecting pipe 9, and the purge assembly includes a third connecting pipe 3, one end of the third connecting pipe 3 is connected to the second connecting pipe 9, and the other end of the third connecting pipe 3 is installed with a three-way solenoid valve 4, one of the connecting ports of the three-way solenoid valve 4 is connected to the nitrogen delivery branch pipe 6, and the nitrogen delivery branch pipe 6 is connected to the nitrogen source through the nitrogen delivery main pipe;

[0027] The pressure measuring component includes a micro differential pressure transmitter, and the high pressure measuring port of the micro differential pressure transmitter is connected to a pressure measuring main pipe, and the pressure measuring main pipe is connected to another connecting port of the three-way solenoid valve 4 through a pressure measuring branch pipe 5. The low pressure measuring port of the micro differential pressure transmitter is connected to the atmosphere. The solenoid valves of the three-way solenoid valve 4 and the pneumatic valve 7 are both controlled by a PLC controller. Through this setting, when the pressure is measured normally, the PLC controller controls the three-way solenoid valve 4 to connect the pressure measuring branch pipe 5 with the third connecting pipe 3, thereby connecting the high pressure measuring port of the micro differential pressure transmitter with the furnace port for real-time monitoring. A pneumatic valve 7 is installed on the second connecting pipe 9, and the poking needle 802 can pass through the valve hole of the pneumatic valve 7 after the pneumatic valve 7 is opened. Through the set pneumatic valve 7, one end of the second connecting pipe 9 connected to the slag breaking mechanism 8 can be closed when the pressure measuring mechanism performs normal pressure measurement or the purge component is in operation.

[0028] It should be noted that the PLC controller in this embodiment may be a Siemens PLC controller model S7-300.

[0029] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0030] Working principle: When the fan is in the low-speed stage, the PLC controller first controls the solenoid valve of the pneumatic valve 7 to open, and then controls the piston rod of the cylinder 801 to extend, thereby driving the poking needle 802 to extend from the pressure-inducing pipe 1 into the first connecting pipe 2 to pierce the slag, and the pierced slag falls into the flue at the end of the converter, and then the PLC controller controls the cylinder 801 to drive the poking needle 802 to retract, and then controls the solenoid valve of the pneumatic valve 7 to close, and then the PLC controller controls the three-way solenoid valve 4 to connect the third connecting pipe 3 with the nitrogen delivery branch pipe 6 to perform a purging operation to blow away the fine dust and slag, and then the PLC controller controls the three-way solenoid valve 4 to connect the pressure measuring branch pipe 5 with the third connecting pipe 3, thereby connecting the high-pressure measuring port of the micro-differential pressure transmitter with the furnace port, and re-monitoring the pressure difference in real time.

[0031] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. An automatic control slag breaking device for increasing converter gas recovery, characterized in that: The invention comprises a pressure-inducing pipe (1), wherein the pressure-inducing pipe (1) is connected to a converter furnace port through a plurality of first connecting pipes (2), wherein a side of the pressure-inducing pipe (1) away from the first connecting pipe (2) is connected to a plurality of second connecting pipes (9) corresponding to the first connecting pipes (2), wherein the second connecting pipes (9) are provided with a slag-breaking mechanism for breaking the steel slag blocked inside the pressure-inducing pipe (1) and inside the first connecting pipe (2), and the second connecting pipes (9) are provided with a purge assembly and a pressure measuring assembly; The slag breaking mechanism comprises a cylinder (801), the cylinder (801) being arranged at one end of the second connecting pipe (9) away from the pressure-inducing pipe (1), and a poking needle (802) being fixedly connected to the piston rod of the cylinder (801); The purge assembly comprises a third connecting pipe (3), one end of the third connecting pipe (3) is connected to the second connecting pipe (9), the other end of the third connecting pipe (3) is provided with a three-way solenoid valve (4), one of the connecting ports of the three-way solenoid valve (4) is connected to a nitrogen delivery branch pipe (6), and the nitrogen delivery branch pipe (6) is connected to a nitrogen source through a nitrogen delivery main pipe; The pressure measuring assembly comprises a micro differential pressure transmitter, the high pressure measuring port of the micro differential pressure transmitter is connected to a pressure measuring main pipe, the pressure measuring main pipe is connected to another connecting port of the three-way solenoid valve (4) through a pressure measuring branch pipe (5), and the low pressure measuring port of the micro differential pressure transmitter is connected to the atmosphere.

2. The automatic control slag breaking device for improving converter gas recovery according to claim 1 is characterized by: The second connecting pipe (9) is provided with a pneumatic valve (7), and the piercing needle (802) can pass through the valve hole of the pneumatic valve after the pneumatic valve (7) is opened.

3. The automatic control slag breaking device for improving converter gas recovery according to claim 2 is characterized by: It also includes a PLC controller, and the solenoid valve for controlling the extension and retraction of the piston rod of the cylinder (801) is controlled by the PLC controller.

4. The automatic control slag breaking device for improving converter gas recovery according to claim 3 is characterized by: The solenoid valves of the three-way solenoid valve (4) and the pneumatic valve (7) are both controlled by the PLC controller.

Images