Control method, device and system of nitrogen regulating valve of blast furnace top gear box

Abstract

The application discloses a nitrogen adjusting valve control method, device and system for a blast furnace top gear box, and relates to the technical field of blast furnace ironmaking.If the target parameter is higher than the first preset threshold value, it represents that the air pressure in the gear box far exceeds the requirement of preventing dust and coal gas in the blast furnace from entering the gear box, the opening of the adjusting valve is reduced until the target parameter is lower than the first preset threshold value, waste caused by excessive nitrogen can be avoided, and over-protection of pressure can be avoided.If the target parameter is lower than the second preset threshold value, it represents that the air pressure in the gear box cannot meet the requirement of preventing dust and coal gas in the blast furnace from entering the gear box, the opening of the adjusting valve is increased until the target parameter is higher than the second preset threshold value, the sealing property of the gear box can be improved, dust and coal gas in the blast furnace can be prevented from entering the gear box, and under-protection of pressure can be avoided.

Description

Technical Field

[0001] This invention relates to the field of blast furnace ironmaking technology, and in particular to a method, device and system for controlling the nitrogen regulating valve of the blast furnace top gearbox. Background Technology

[0002] The bell-less blast furnace top gearbox is a key piece of equipment in the charging system, often referred to as a water-cooled, airtight box. During production, it requires circulating water cooling and nitrogen sealing to maintain normal temperature and pressure inside the gearbox. The nitrogen sealing involves introducing nitrogen gas into the gearbox for protection, and the nitrogen inlet pipe is equipped with a regulating valve to adjust the nitrogen flow rate. Currently, the valve opening remains constant, resulting in a fixed nitrogen flow rate, which can easily lead to under- or over-protection issues for the gearbox. Summary of the Invention

[0003] This invention solves the technical problem of how to avoid under-protection and over-protection of the nitrogen regulating valve in the blast furnace top gearbox by providing a method, device and system for controlling the nitrogen regulating valve in the blast furnace top gearbox.

[0004] On the one hand, the present invention provides the following technical solution:

[0005] A method for controlling the nitrogen regulating valve of a blast furnace top gearbox includes:

[0006] Obtain the target parameters of the gearbox, wherein the target parameters are nitrogen flow rate or nitrogen pressure;

[0007] If the target parameter is higher than the first preset threshold corresponding to the target parameter, the opening of the regulating valve is reduced until the target parameter is lower than the first preset threshold.

[0008] If the target parameter is lower than the second preset threshold corresponding to the target parameter, the opening of the regulating valve is increased until the target parameter is higher than the second preset threshold.

[0009] Preferably, before obtaining the target parameters of the gearbox, the method further includes:

[0010] Obtain the operating current of the drive motor of the gearbox;

[0011] If the operating current is higher than the third preset threshold, the opening of the regulating valve is increased;

[0012] If the operating current is lower than the fourth preset threshold, the opening of the regulating valve is reduced;

[0013] If the operating current is between the fourth preset threshold and the third preset threshold, then the step of obtaining the target parameters of the gearbox is executed.

[0014] Preferably, before obtaining the target parameters of the gearbox, the method further includes:

[0015] Obtain the dust content and / or gas concentration inside the gearbox;

[0016] If the dust content is higher than the preset content or the gas concentration is higher than the preset concentration, then the regulating valve is opened.

[0017] On the other hand, the present invention also provides the following technical solution:

[0018] A nitrogen regulating valve control device for a blast furnace top gearbox includes:

[0019] The parameter acquisition module is used to acquire the target parameters of the gearbox, wherein the target parameters are nitrogen flow rate or nitrogen pressure.

[0020] The regulating valve control module is used to reduce the opening of the regulating valve if the target parameter is higher than a first preset threshold corresponding to the target parameter, until the target parameter is lower than the first preset threshold.

[0021] The regulating valve control module is further configured to increase the opening of the regulating valve if the target parameter is lower than the second preset threshold corresponding to the target parameter, until the target parameter is higher than the second preset threshold.

[0022] On the other hand, the present invention also provides the following technical solution:

[0023] A nitrogen regulating valve control system for a blast furnace top gearbox includes:

[0024] A nitrogen flow detection device is used to detect the nitrogen flow rate in the gearbox.

[0025] A nitrogen pressure detection device is used to detect the nitrogen pressure in the gearbox;

[0026] The controller is used to acquire target parameters of the gearbox, wherein the target parameters are nitrogen flow rate or nitrogen pressure; if the target parameter is higher than a first preset threshold corresponding to the target parameter, the opening of the regulating valve is reduced until the target parameter is lower than the first preset threshold; if the target parameter is lower than a second preset threshold corresponding to the target parameter, the opening of the regulating valve is increased until the target parameter is higher than the second preset threshold.

[0027] Preferably, the nitrogen regulating valve control system further includes:

[0028] A motor current detection device is used to detect the operating current of the drive motor of the gearbox;

[0029] The controller is further configured to acquire the operating current; if the operating current is higher than a third preset threshold, increase the opening of the regulating valve; if the operating current is lower than a fourth preset threshold, decrease the opening of the regulating valve; if the operating current is between the fourth preset threshold and the third preset threshold, acquire the target parameter.

[0030] Preferably, the nitrogen regulating valve control system further includes:

[0031] A dust content detection device is used to detect the dust content inside the gearbox;

[0032] The controller is also used to acquire the dust content; if the dust content is higher than a preset content, the regulating valve is opened.

[0033] Preferably, the nitrogen regulating valve control system further includes:

[0034] A gas concentration detection device is used to detect the gas concentration inside the gearbox;

[0035] The controller is also used to acquire the gas concentration; if the gas concentration is higher than a preset concentration, the regulating valve is opened.

[0036] On the other hand, the present invention also provides the following technical solution:

[0037] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements any of the nitrogen regulating valve control methods described above.

[0038] On the other hand, the present invention also provides the following technical solution:

[0039] A computer-readable storage medium storing a computer program that, when executed by a processor, implements any of the nitrogen regulating valve control methods described above.

[0040] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0041] If the target parameter is detected to be higher than the first preset threshold, it means that the air pressure in the gearbox far exceeds the requirement to prevent dust and gas from the blast furnace from entering the gearbox. Reducing the opening of the regulating valve until the target parameter is lower than the first preset threshold can avoid waste caused by excessive nitrogen and avoid pressure over-protection. If the target parameter is lower than the second preset threshold, it means that the air pressure in the gearbox cannot meet the requirement to prevent dust and gas from the blast furnace from entering the gearbox. Increasing the opening of the regulating valve until the target parameter is higher than the second preset threshold can improve the sealing of the gearbox, prevent dust and gas from the blast furnace from entering the gearbox, and avoid pressure under-protection. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the nitrogen regulating valve control system of the blast furnace top gearbox in an embodiment of the present invention;

[0044] Figure 2 This is a flowchart of the nitrogen regulating valve control method for the blast furnace top gearbox in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the nitrogen regulating valve control device of the blast furnace top gearbox in an embodiment of the present invention. Detailed Implementation

[0046] The embodiments of the present invention provide a method, device and system for controlling the nitrogen regulating valve of the blast furnace top gearbox, thereby solving the technical problem of how to avoid under-protection and over-protection of the blast furnace top gearbox.

[0047] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0049] like Figure 1 As shown, the nitrogen regulating valve control system of this embodiment may include: a nitrogen flow detection device for detecting the nitrogen flow rate of the gearbox; a nitrogen pressure detection device for detecting the nitrogen pressure of the gearbox; and a controller.

[0050] like Figure 2 As shown, the nitrogen regulating valve control method of the blast furnace top gearbox in this embodiment is applied to... Figure 1 The controller may include:

[0051] Step S1: Obtain the target parameters of the gearbox, which are nitrogen flow rate or nitrogen pressure;

[0052] Step S2: If the target parameter is higher than the first preset threshold corresponding to the target parameter, reduce the opening of the regulating valve until the target parameter is lower than the first preset threshold.

[0053] Step S3: If the target parameter is lower than the second preset threshold corresponding to the target parameter, increase the opening of the regulating valve until the target parameter is higher than the second preset threshold.

[0054] In this embodiment, if the target parameter is nitrogen flow rate, then the first preset threshold can be 4000m³. 3 / h, the second preset threshold can be 1000m 3 / h; If the target parameter is nitrogen pressure, the first preset threshold can be 3.0 bar and the second preset threshold can be 2.9 bar.

[0055] For the gearbox, the requirement is that dust and gas from the blast furnace cannot enter the gearbox. Understandably, if the gas pressure inside the gearbox is higher than that in the blast furnace, creating a pressure differential, then dust and gas from the blast furnace will not enter the gearbox. The gas pressure inside the blast furnace is typically 2.8 bar. In the traditional method, after opening the regulating valve, the valve opening remains unchanged. Therefore, the nitrogen flow rate is constant, and the nitrogen pressure inside the gearbox is constant. If the nitrogen pressure is significantly higher than 3.0 bar, exceeding 2.8 bar by a large margin, it means that the gas pressure inside the gearbox far exceeds the requirement to prevent dust and gas from the blast furnace from entering the gearbox. The unchanged valve opening in the traditional method leads to excessive nitrogen, causing over-protection and wasting nitrogen. Conversely, if the nitrogen pressure is slightly lower than 2.9 bar, exceeding 2.8 bar by a small margin, it may not be sufficient to prevent dust and gas from the blast furnace from entering the gearbox. The unchanged valve opening in the traditional method leads to insufficient nitrogen, failing to form an effective seal and causing under-protection.

[0056] In this embodiment, if the target parameter is nitrogen pressure, and the nitrogen pressure is higher than the first preset threshold, it means that the gas pressure inside the gearbox far exceeds the requirement to prevent dust and gas from the blast furnace from entering the gearbox. Reducing the opening of the regulating valve until the nitrogen pressure is lower than the first preset threshold can avoid waste caused by excessive nitrogen and prevent over-protection of pressure. If the nitrogen pressure is lower than the second preset threshold, it means that the gas pressure inside the gearbox cannot meet the requirement to prevent dust and gas from the blast furnace from entering the gearbox. Increasing the opening of the regulating valve until the nitrogen pressure is higher than the second preset threshold can improve the sealing of the gearbox, prevent dust and gas from the blast furnace from entering the gearbox, and prevent under-protection of pressure.

[0057] If the target parameter is nitrogen flow rate, since nitrogen pressure and nitrogen flow rate are positively correlated, the nitrogen flow rate can be set to 4000 m³ / h. 3 The nitrogen pressure is exactly 3.0 bar and the nitrogen flow rate is 1000 m³ / h. 3The nitrogen pressure is exactly 2.9 bar at a flow rate of / h, thus allowing for nitrogen flow rates above 4000 m³ / h. 3 / h Reduce the opening of the regulating valve until the nitrogen flow rate is below 4000m 3 / h, can reduce nitrogen pressure to below 3.0 bar, and nitrogen flow rate to below 1000 m³ / h. 3 Increase the opening of the regulating valve by / h until the nitrogen flow rate exceeds 1000m³ / h. 3 / h can increase the nitrogen pressure to above 2.9 bar.

[0058] In this embodiment, the requirements for the gearbox are not only about sealing, but also about preventing the temperature inside the gearbox from becoming too high to avoid equipment burnout. When a gear malfunction causes excessive current in the drive motor, the motor temperature will rise excessively, potentially leading to burnout. If the amount of nitrogen in the gearbox is insufficient at this time, it cannot effectively reduce the motor temperature, resulting in under-protection of the temperature. Conversely, when the drive motor's operating current is low, the motor temperature will not rise due to the current. If the amount of nitrogen in the gearbox is excessive at this time, it will waste nitrogen, resulting in over-protection of the temperature. To avoid gearbox temperature over-protection and under-protection, the nitrogen regulating valve control system of this embodiment may further include: a motor current detection device for detecting the operating current of the drive motor of the gearbox; before step S1, the nitrogen regulating valve control method of this embodiment may further include: acquiring the operating current of the drive motor of the gearbox; if the operating current is higher than a third preset threshold, increasing the opening of the regulating valve; if the operating current is lower than a fourth preset threshold, decreasing the opening of the regulating valve; if the operating current is between the fourth preset threshold and the third preset threshold, executing step S1. The third preset threshold can be 40A, and the fourth preset threshold can be 25A. If the operating current of the drive motor is higher than the third preset threshold, it means that the motor temperature will rise due to excessive current. In this case, increasing the opening of the regulating valve can increase the amount of nitrogen, effectively reducing the motor temperature and preventing under-temperature protection. If the operating current of the drive motor is lower than the fourth preset threshold, it means that the motor temperature will not rise due to current. In this case, decreasing the opening of the regulating valve can reduce the amount of nitrogen, avoiding nitrogen waste and preventing over-temperature protection.

[0059] In this embodiment, the regulating valve can be opened when the blast furnace and gearbox start operating, so that the nitrogen pressure is slightly higher than the blast furnace gas pressure, completely preventing dust or gas from entering the gearbox. However, if the gearbox itself has good sealing properties and dust and gas from the blast furnace will not enter the gearbox when no nitrogen is input, opening the regulating valve at the beginning is not conducive to saving nitrogen. To further save nitrogen, the nitrogen regulating valve control system of this embodiment may also include: a dust content detection device for detecting the dust content in the gearbox; a gas concentration detection device for detecting the gas concentration in the gearbox; before step S1, the nitrogen regulating valve control method of this embodiment may also include: obtaining the dust content and / or gas concentration in the gearbox; if the dust content is higher than a preset content or the gas concentration is higher than a preset concentration, then the regulating valve is opened. The preset content and preset concentration can both be zero, indicating that the regulating valve is opened when dust or gas enters the gearbox. If the dust content or gas concentration is higher than the preset level, it means that the gearbox's own sealing cannot prevent dust and gas from entering the gearbox. In this case, the regulating valve can be opened in time to introduce nitrogen to blow the dust and gas out of the gearbox, thus providing protection. When both the dust content and gas concentration are zero, the regulating valve can be closed to save nitrogen.

[0060] like Figure 3 As shown, this embodiment also provides a nitrogen regulating valve control device for a blast furnace top gearbox, comprising:

[0061] The parameter acquisition module is used to acquire the target parameters of the gearbox, which are either nitrogen flow rate or nitrogen pressure.

[0062] The regulating valve control module is used to reduce the opening of the regulating valve if the target parameter is higher than the first preset threshold corresponding to the target parameter, until the target parameter is lower than the first preset threshold.

[0063] The regulating valve control module is also used to increase the opening of the regulating valve if the target parameter is lower than the second preset threshold corresponding to the target parameter, until the target parameter is higher than the second preset threshold.

[0064] Furthermore, the parameter acquisition module can also be used to acquire the operating current of the drive motor of the gearbox; the regulating valve control module can also be used to increase the opening of the regulating valve if the operating current is higher than a third preset threshold; decrease the opening of the regulating valve if the operating current is lower than a fourth preset threshold; and acquire the target parameters of the gearbox if the operating current is between the fourth preset threshold and the third preset threshold.

[0065] Furthermore, the parameter acquisition module can also be used to: acquire the dust content and / or gas concentration in the gearbox; the regulating valve control module can also be used to open the regulating valve if the dust content is higher than a preset content or the gas concentration is higher than a preset concentration.

[0066] Based on the same inventive concept as the nitrogen regulating valve control method described above, this embodiment also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps of any of the nitrogen regulating valve control methods described above.

[0067] The bus architecture (represented by a bus) can include any number of interconnected buses and bridges, linking various circuits including one or more processors (represented by a processor) and memory (represented by memory). The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface between the bus and receivers and transmitters. Receivers and transmitters can be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium. The processor is responsible for managing the bus and general processing, while memory can be used to store data used by the processor during operation.

[0068] Since the electronic device described in this embodiment is the electronic device used to implement the nitrogen regulating valve control method in this embodiment of the invention, those skilled in the art can understand the specific implementation and various variations of the electronic device based on the nitrogen regulating valve control method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the nitrogen regulating valve control method in this embodiment of the invention falls within the scope of protection of this invention.

[0069] Based on the same inventive concept as the nitrogen regulating valve control method described above, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the nitrogen regulating valve control methods described above.

[0070] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0071] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0072] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0073] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0074] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0075] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method of controlling a nitrogen regulating valve of a blast furnace top gear box, characterized by, The method comprises the following steps: acquiring a target parameter of the gearbox, the target parameter being nitrogen flow rate or nitrogen pressure; if the target parameter is higher than a first preset threshold corresponding to the target parameter, reducing the opening degree of the regulating valve until the target parameter is lower than the first preset threshold; if the target parameter is lower than a second preset threshold corresponding to the target parameter, increasing the opening degree of the regulating valve until the target parameter is higher than the second preset threshold; before the step of acquiring the target parameter of the gearbox, the method further comprises the following steps: acquiring the dust content and / or the coal gas concentration in the gearbox; if the dust content is higher than a preset content or the coal gas concentration is higher than a preset concentration, opening the regulating valve; if the dust content is the preset content and the coal gas concentration is the preset concentration, closing the regulating valve to save nitrogen, wherein the preset content and the preset concentration are zero.

2. The nitrogen regulating valve control method for a blast furnace top gear box according to claim 1, characterized by, before the step of acquiring the target parameter of the gearbox, the method further comprises the following steps: acquiring the operating current of the driving motor of the gearbox; if the operating current is higher than a third preset threshold, increasing the opening degree of the regulating valve; if the operating current is lower than a fourth preset threshold, reducing the opening degree of the regulating valve; if the operating current is between the fourth preset threshold and the third preset threshold, performing the step of acquiring the target parameter of the gearbox.

3. A nitrogen regulating valve control device for a blast furnace top gear box, characterized by, The method comprises the following steps: a parameter acquisition module is configured to acquire a target parameter of the gearbox, the target parameter being nitrogen flow rate or nitrogen pressure; a regulating valve control module is configured to, if the target parameter is higher than a first preset threshold corresponding to the target parameter, reduce the opening degree of the regulating valve until the target parameter is lower than the first preset threshold; the regulating valve control module is further configured to, if the target parameter is lower than a second preset threshold corresponding to the target parameter, increase the opening degree of the regulating valve until the target parameter is higher than the second preset threshold; before the step of acquiring the target parameter of the gearbox, the method further comprises the following steps: acquiring the dust content and / or the coal gas concentration in the gearbox; if the dust content is higher than a preset content or the coal gas concentration is higher than a preset concentration, opening the regulating valve; if the dust content is the preset content and the coal gas concentration is the preset concentration, closing the regulating valve to save nitrogen, wherein the preset content and the preset concentration are zero.

4. A nitrogen regulating valve control system for a blast furnace top gear box, characterized by, The method comprises the following steps: a nitrogen flow rate detection device is configured to detect the nitrogen flow rate of the gearbox; a nitrogen pressure detection device is configured to detect the nitrogen pressure of the gearbox; a controller is configured to acquire a target parameter of the gearbox, the target parameter being nitrogen flow rate or nitrogen pressure; if the target parameter is higher than a first preset threshold corresponding to the target parameter, reduce the opening degree of the regulating valve until the target parameter is lower than the first preset threshold; if the target parameter is lower than a second preset threshold corresponding to the target parameter, increase the opening degree of the regulating valve until the target parameter is higher than the second preset threshold; the method further comprises the following steps: a dust content detection device is configured to detect the dust content in the gearbox; the controller is further configured to acquire the dust content; if the dust content is higher than a preset content, open the regulating valve; The coal gas concentration detection device is used for detecting the coal gas concentration in the gear box. The controller is further configured to acquire the coal gas concentration, open the regulating valve if the coal gas concentration is higher than a preset concentration, and close the regulating valve to save nitrogen if the dust content is a preset content and the coal gas concentration is a preset concentration, wherein the preset content and the preset concentration are zero.

5. The nitrogen regulating valve control system for a blast furnace top gear box of claim 4, wherein, Further comprising: A motor current detection device configured to detect the operating current of the driving motor of the gear box. The controller is further configured to acquire the operating current. If the operating current is higher than a third preset threshold, the opening degree of the regulating valve is increased; if the operating current is lower than a fourth preset threshold, the opening degree of the regulating valve is decreased; and if the operating current is between the fourth preset threshold and the third preset threshold, the target parameter is acquired.

6. An electronic device, comprising: The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the nitrogen regulating valve control method of the blast furnace top gear box according to any one of claims 1-2.

7. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the nitrogen regulating valve control method of the blast furnace top gear box according to any one of claims 1-2.

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