A converter secondary and tertiary dust removal automatic adjustment system and method

Abstract

The present invention proposes a system and method for automatic adjustment of secondary and tertiary dust removal of a converter, the system comprising: a dust collector, an angle sensor and a control module, the control module is respectively connected to the fan motor of the dust collector and the angle sensor signal; the angle sensor is arranged on the converter, and is used to monitor the tilting angle of the converter in real time and send it to the control module; the control module is used to identify the production stage of the converter in the current smelting cycle according to the tilting angle of the converter, determine the speed of the fan motor of the dust collector according to the production stage, generate a speed control signal and send it to the dust collector; the dust collector is used to adjust the speed of the fan motor according to the speed control signal. The present invention can control the speed of the fan through the tilting angle signal of the converter according to the different amounts of flue gas generated at different stages in the converter smelting cycle, adjust the air volume of the dust collector, and achieve power saving and energy saving.

Description

Technical Field

[0001] The invention relates to the technical field of steel smelting, and more particularly to a secondary and tertiary dust removal automatic adjustment system and method for a converter. Background Art

[0002] In the steel smelting process, converter smelting is the core link, and its environmental performance and energy utilization efficiency are directly related to the sustainable development of steel enterprises. How to efficiently and accurately capture the flue gas generated in the converter smelting process has become an important challenge facing steel enterprises.

[0003] In order to meet this challenge, most steel companies have built converter secondary and tertiary dust removal systems. These systems use high-efficiency dust removal equipment, such as bag filters and electrostatic precipitators, to capture and treat the flue gas generated during the converter smelting process, effectively reducing the concentration of flue gas emissions and meeting environmental protection requirements.

[0004] However, the existing dust removal system is usually designed with about 20% surplus air volume to ensure effective dust removal under various extreme working conditions. Although this design improves the stability and reliability of the system, it also brings about the problem of energy waste. Because converter smelting is a cyclical process, the main dust production stages are concentrated in the early charging and later steel-making stages, while in the middle blowing stage and the stage after steel-making, there is not much flue gas overflowing from the front of the furnace. If the dust collector fan keeps running at a high frequency, it will cause a lot of energy waste in the non-main dust-producing stage.

[0005] In addition, the existing dust removal system lacks intelligent adjustment means and cannot dynamically adjust the fan speed and dust removal efficiency according to the actual progress of converter smelting. This causes the fan to operate inefficiently most of the time, which increases energy consumption and reduces dust removal effect. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide an automatic adjustment system and method for the secondary and tertiary dust removal of a converter, which can control the speed of the fan and adjust the air volume of the dust collector through the tilting angle signal of the converter according to the different amounts of flue gas generated at different stages of the converter smelting cycle, thereby achieving power saving and energy saving.

[0007] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, the present invention discloses a converter secondary and tertiary dust removal automatic adjustment system, comprising: a dust collector, an angle sensor and a control module, wherein the control module is respectively connected to the fan motor of the dust collector and the angle sensor signal; The angle sensor is arranged on the converter to monitor the tilting angle of the converter in real time and send the information to the control module; A control module is used to identify the production stage of the converter in the current smelting cycle according to the tilting angle of the converter, determine the speed of the fan motor of the dust collector according to the production stage, and generate a speed control signal to send to the dust collector; A dust collector is used to adjust the speed of the fan motor according to the speed control signal.

[0008] Furthermore, the production stage includes: Charging stage, blowing stage, steel tapping stage and slag tapping stage.

[0009] Further, the control module includes a production stage identification unit; The production stage identification unit is used to: Obtain the tilt angle within a preset time period, and extract the maximum value A of the tilt angle and the minimum value B of the tilt angle; When A>30° and B<60°, the converter is in the charging stage; When A>0° and B<10°, the converter is in the blowing stage; When A>60° and B<90°, the converter is in the steel-out stage; When A>60° and B<80°, the converter is in the slagging stage.

[0010] Further, the control module also includes a speed signal generating unit; The speed signal generation unit is used for: When the converter is in the charging stage or the steel tapping stage, it is determined that the speed of the fan motor of the dust collector is set to Z1, and a first speed control signal is generated and sent to the dust collector; When the converter is in the blowing stage or the slag discharging stage, it is determined that the speed of the fan motor of the dust collector is set to Z2, and a second speed control signal is generated and sent to the dust collector; Among them, Z1>Z2.

[0011] Furthermore, the dust collector fan motor adopts a frequency converter for variable frequency speed regulation, or adopts a magnetic speed regulator for magnetic speed regulation.

[0012] Furthermore, the control module adopts a PLC control system or a DCS control system.

[0013] Furthermore, the control module is also used for: Monitor the speed of the fan motor of the dust collector in real time and identify the fluctuation difference of the speed; Determining whether the fluctuation difference is greater than the standard fluctuation difference; If so, it is determined that the fan motor of the dust collector is operating abnormally and an alarm message is issued.

[0014] In a second aspect, the present invention further discloses a method for automatically adjusting the secondary and tertiary dust removal of a converter, comprising: Real-time monitoring of the converter's tilting angle; According to the tilting angle of the converter, the production stage of the converter in the current smelting cycle is identified, and the speed of the fan motor of the dust collector is determined according to the production stage to generate a speed control signal; The speed of the fan motor of the dust collector is adjusted according to the speed control signal.

[0015] Further, the production stage of the converter in the current smelting cycle is identified according to the tilting angle of the converter, the speed of the fan motor of the dust collector is determined according to the production stage, and the speed control signal is generated, including: Obtain the tilt angle within a preset time period, and extract the maximum value A of the tilt angle and the minimum value B of the tilt angle; When A>30° and B<60°, the converter is in the charging stage; When A>0° and B<10°, the converter is in the blowing stage; When A>60° and B<90°, the converter is in the steel-out stage; When A>60° and B<80°, the converter is in the slagging stage; When the converter is in the charging stage or the steel tapping stage, it is determined that the speed of the fan motor of the dust collector is set to Z1, and a first speed control signal is generated and sent to the dust collector; When the converter is in the blowing stage or the slag discharging stage, it is determined that the speed of the fan motor of the dust collector is set to Z2, and a second speed control signal is generated and sent to the dust collector; Among them, Z1>Z2.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention controls the rotation speed of the fan through the tilting angle signal of the converter according to the different amounts of flue gas generated at different stages of the converter smelting cycle, adjusts the air volume of the dust collector, achieves power saving and energy saving, and reduces the load of the dust collector and the wear of the bags, which is beneficial to the long-term stable operation of the dust collector.

[0017] 2. The present invention realizes automatic regulation of the fan speed of the dust collector, adjusts the air volume according to the amount of smoke, and improves the dust removal efficiency.

[0018] 3. The present invention improves the environmental performance of the converter smelting process and meets the ultra-low emission standards.

[0019] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 It is a system structure diagram of a specific implementation mode of the present invention.

[0022] Figure 2 It is a method flow chart of a specific implementation mode of the present invention.

[0023] In the figure, 1. dust collector; 2. angle sensor; 3. control module; 4. production stage identification unit; 5. speed signal generating unit. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 As shown, this embodiment provides an automatic adjustment system for secondary and tertiary dust removal of a converter, comprising: a dust collector 1, an angle sensor 2 and a control module 3, and the control module 3 is respectively connected to the fan motor of the dust collector 1 and the angle sensor 2 signals.

[0026] The angle sensor 2 is arranged on the converter to monitor the tilting angle of the converter in real time and send the information to the control module 3. The angle sensor 2 collects the tilting angle signal of the converter and sends the information to the control module 3.

[0027] The dust collector 1 is used to adjust the speed of the fan motor according to the speed control signal sent by the control module 3, and is also used to send the real-time speed signal to the control module. Among them, the fan motor of the dust collector 1 adopts a frequency converter to achieve variable frequency speed regulation, or adopts a magnetic speed regulator to achieve magnetic speed regulation. The dust collector 1 sends the frequency conversion signal to the control module 3 in real time.

[0028] The control module 3 is used to identify the production stage of the converter in the current smelting cycle according to the tilting angle of the converter, determine the speed of the fan motor of the dust collector 1 according to the production stage, and generate a speed control signal to send to the dust collector 1; it is also used to monitor the speed of the fan motor of the dust collector 1 in real time and identify the fluctuation difference of the speed; determine whether the fluctuation difference is greater than the standard fluctuation difference; if so, it is determined that the fan motor of the dust collector 1 is operating abnormally and an alarm message is issued.

[0029] Among them, the control module 3 adopts a PLC or DCS control system.

[0030] In a specific implementation, the control module 3 includes a production stage identification unit 4 and a rotation speed signal generation unit 5 .

[0031] The production stage identification unit 4 is used to: Obtain the tilt angle within a preset time period, and extract the maximum value A of the tilt angle and the minimum value B of the tilt angle; When A>30° and B<60°, the converter is in the charging stage; When A>0° and B<10°, the converter is in the blowing stage; When A>60° and B<90°, the converter is in the steel-out stage; When A>60° and B<80°, the converter is in the slagging stage.

[0032] The speed signal generating unit 5 is used for: When the converter is in the charging stage or the steel tapping stage, it is determined that the speed of the fan motor of the dust collector 1 is set to Z1, and a first speed control signal is generated and sent to the dust collector 1; When the converter is in the blowing stage or the slag discharging stage, it is determined that the speed of the fan motor of the dust collector 1 is set to Z2, and a second speed control signal is generated and sent to the dust collector 1; Among them, Z1>Z2.

[0033] In this embodiment, since the converter smelting process is generally divided into several stages such as charging, blowing, steel tapping, and slag tapping, the tilting angle of the converter is different in each stage. The control module 3 can adjust the speed of the fan motor of the dust collector 1 according to the different tilting angles of the converter during the smelting process. The fan runs at high speed in the stages with large smoke such as charging and steel tapping, and the dust removal fan runs at low speed in other stages with small smoke, so as to achieve the effect of saving electricity.

[0034] Based on the above converter secondary and tertiary dust removal automatic adjustment system, see Figure 2 As shown, the present invention also discloses a method for automatically adjusting the secondary and tertiary dust removal of a converter, comprising the following steps: S1: Real-time monitoring of the tilting angle of the converter.

[0035] S2: According to the tilting angle of the converter, the production stage of the converter in the current smelting cycle is identified, the speed of the fan motor of the dust collector is determined according to the production stage, and a speed control signal is generated.

[0036] Specifically, the tilt angle within a preset time period is first obtained, and the maximum value A of the tilt angle and the minimum value B of the tilt angle are extracted.

[0037] When A>30° and B<60°, the converter is in the charging stage; when A>0° and B<10°, the converter is in the blowing stage; when A>60° and B<90°, the converter is in the steel tapping stage; when A>60° and B<80°, the converter is in the slag tapping stage.

[0038] At this point, the speed of the fan motor of the dust collector can be determined based on the determined production stage. Including: When the converter is in the charging stage or the steel-discharging stage, the speed of the fan motor of the dust collector is determined to be set to Z1, and a first speed control signal is generated and sent to the dust collector; when the converter is in the blowing stage or the slag-discharging stage, the speed of the fan motor of the dust collector is determined to be set to Z2, and a second speed control signal is generated and sent to the dust collector; wherein, Z1>Z2.

[0039] S3: Adjust the speed of the fan motor of the dust collector according to the speed control signal.

[0040] The specific implementation of the automatic adjustment method for the second and third dust removal of the converter in this embodiment is basically the same as the specific implementation of the automatic adjustment system for the second and third dust removal of the converter mentioned above, and will not be repeated here.

[0041] In summary, the present invention adopts the frequency conversion or magnetic speed regulation technology of the dust collector fan motor, combined with the PLC or DCS control system, and according to the different amounts of flue gas generated in different stages of the converter smelting cycle, uses the converter tilting angle signal as the control basis to automatically adjust the speed of the dust collector fan, thereby adjusting the dust removal air volume. In stages with large amounts of flue gas such as charging and steel tapping, the fan runs at high speed; in other stages with smaller flue gas, the fan runs at low speed. The present invention improves the dust removal efficiency, saves energy consumption, reduces the load on the dust collector and the wear of the bags, is conducive to the long-term and stable operation of the dust collector, and at the same time improves the environmental protection performance of the converter smelting process, meeting the ultra-low emission standards.

[0042] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. As for the method disclosed in the embodiment, since it corresponds to the system disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0043] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

[0044] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0045] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, or each module may exist physically separately, or two or more modules may be integrated into one unit.

[0046] Similarly, each processing unit in each embodiment of the present invention may be integrated into one functional module, or each processing unit may exist physically, or two or more processing units may be integrated into one functional module.

[0047] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0048] The above is a detailed introduction to the automatic adjustment system and method for the secondary and tertiary dust removal of the converter provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A converter secondary and tertiary dust removal automatic adjustment system, characterized in that: include: A dust collector, an angle sensor and a control module, wherein the control module is respectively connected to the fan motor of the dust collector and the angle sensor signal; The angle sensor is arranged on the converter to monitor the tilting angle of the converter in real time and send the information to the control module; A control module is used to identify the production stage of the converter in the current smelting cycle according to the tilting angle of the converter, determine the speed of the fan motor of the dust collector according to the production stage, and generate a speed control signal to send to the dust collector; A dust collector is used to adjust the speed of the fan motor according to the speed control signal.

2. The automatic adjustment system for secondary and tertiary dust removal of converter according to claim 1 is characterized in that: The production phases include: Charging stage, blowing stage, steel tapping stage and slag tapping stage.

3. The automatic adjustment system for secondary and tertiary dust removal of converter according to claim 2 is characterized in that: The control module includes a production stage identification unit; The production stage identification unit is used to: Obtain the tilt angle within a preset time period, and extract the maximum value A of the tilt angle and the minimum value B of the tilt angle; When A>30° and B<60°, the converter is in the charging stage; When A>0° and B<10°, the converter is in the blowing stage; When A>60° and B<90°, the converter is in the steel-out stage; When A>60° and B<80°, the converter is in the slagging stage.

4. The automatic adjustment system for secondary and tertiary dust removal of a converter according to claim 3 is characterized in that: The control module also includes a speed signal generating unit; The speed signal generation unit is used for: When the converter is in the charging stage or the steel tapping stage, it is determined that the speed of the fan motor of the dust collector is set to Z1, and a first speed control signal is generated and sent to the dust collector; When the converter is in the blowing stage or the slag discharging stage, it is determined that the speed of the fan motor of the dust collector is set to Z2, and a second speed control signal is generated and sent to the dust collector; Among them, Z1>Z2.

5. The automatic adjustment system for secondary and tertiary dust removal of converter according to claim 1 is characterized in that: The fan motor of the dust collector adopts a frequency converter for frequency conversion speed regulation, or adopts a magnetic speed regulator for magnetic speed regulation.

6. The automatic adjustment system for secondary and tertiary dust removal of converter according to claim 1 is characterized in that: The control module adopts a PLC control system or a DCS control system.

7. The automatic adjustment system for secondary and tertiary dust removal of converter according to claim 1 is characterized in that: The control module is also used for: Monitor the speed of the fan motor of the dust collector in real time and identify the fluctuation difference of the speed; Determining whether the fluctuation difference is greater than the standard fluctuation difference; If so, it is determined that the fan motor of the dust collector is operating abnormally and an alarm message is issued.

8. A method for automatically adjusting the secondary and tertiary dust removal of a converter, characterized in that: The method adopts the automatic adjustment system for secondary and tertiary dust removal of the converter as claimed in any one of claims 1 to 7; The method comprises: Real-time monitoring of the converter's tilting angle; According to the tilting angle of the converter, the production stage of the converter in the current smelting cycle is identified, and the speed of the fan motor of the dust collector is determined according to the production stage to generate a speed control signal; The speed of the fan motor of the dust collector is adjusted according to the speed control signal.

9. The automatic adjustment method for the secondary and tertiary dust removal of a converter according to claim 8, characterized in that: The method of identifying the production stage of the converter in the current smelting cycle according to the tilting angle of the converter, determining the speed of the fan motor of the dust collector according to the production stage, and generating a speed control signal includes: Obtain the tilt angle within a preset time period, and extract the maximum value A of the tilt angle and the minimum value B of the tilt angle; When A>30° and B<60°, the converter is in the charging stage; When A>0° and B<10°, the converter is in the blowing stage; When A>60° and B<90°, the converter is in the steel-out stage; When A>60° and B<80°, the converter is in the slagging stage; When the converter is in the charging stage or the steel tapping stage, it is determined that the speed of the fan motor of the dust collector is set to Z1, and a first speed control signal is generated and sent to the dust collector; When the converter is in the blowing stage or the slag discharging stage, it is determined that the speed of the fan motor of the dust collector is set to Z2, and a second speed control signal is generated and sent to the dust collector; Among them, Z1>Z2.

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