Intelligent adjusting system and method for dedusting air volume of blast furnace

Abstract

The invention relates to a blast furnace dedusting air volume intelligent adjusting system and method, and relates to the technical field of blast furnace dedusting, the blast furnace dedusting air volume intelligent adjusting system comprises a 1 # tap hole, a 2 # tap hole, a 3 # tap hole and a 4 # tap hole, and further comprises a tap hole dedusting pipeline assembly, a deduster front main pipe assembly, a dedusting assembly and a visual detection control assembly; different working states of the tap hole are visually recognized, different air volume requirements are matched according to the different working states, then the frequency of the draught fan is automatically adjusted through the PLC control panel, the power consumption of the draught fan is saved, the problem of energy waste or insufficient dust collection capacity is avoided, system operation adjustment is timely, manpower is saved, and the working efficiency is improved. And the dependence on the experience of operators is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace dust removal, and in particular to a blast furnace dust removal air volume intelligent adjustment system and method for optimizing dust removal efficiency and reducing energy consumption. Background Art

[0002] Blast furnace tapping refers to the metallurgical operation of opening the blast furnace tapping port to release the molten iron in the furnace. It is one of the key processes in the blast furnace ironmaking process in the metallurgical industry. At present, a large amount of harmful smoke and dust will be generated in the blast furnace tapping process. Therefore, it is necessary to set up a bag dust collector to treat the dust-producing points in the tapping process. At present, large and medium-sized blast furnaces generally have four tapping ports. The tapping system is diagonal tapping or one main groove is standby for maintenance, and the three main grooves tap out in turn. Due to different tapping systems, the air volume required for dust removal is also different. Even for one tapping port, the dust production in different tapping stages is different, and it generally goes through three stages: 1. The dust concentration increases sharply in the early stage of tapping, 2. The dust concentration is stable in the middle stage of tapping, and 3. The dust concentration increases twice in the late stage of tapping.

[0003] At present, most blast furnace dust removal processes rely on manual experience, judgment and control, which is difficult to match the actual needs on site. In addition, the timing of fan frequency adjustment is delayed, resulting in poor timeliness of control. The air volume cannot be adjusted in real time according to the smoke concentration, resulting in energy waste or insufficient dust collection capacity. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned background technology, and proposes an intelligent adjustment system and method for blast furnace dust removal air volume, which dynamically adjusts the valve opening and fan frequency by real-time monitoring of smoke parameters to achieve efficient dust removal and energy saving optimization.

[0005] The technical solution adopted by the present invention to solve the technical problem is: A blast furnace dust removal air volume intelligent adjustment system includes 1# taphole, 2# taphole, 3# taphole and 4# taphole, characterized in that it also includes a taphole dust removal pipeline component, a dust collector front main component, a dust removal component and a visual detection control component. The taphole dust removal pipeline components are arranged in one-to-one correspondence with the taphole; The dust collector front main pipe components of the two flow paths are connected to the four sets of iron mouth dust removal pipeline components in pairs; The two groups of dust removal components are respectively connected to the two flow paths of the front main assembly of the dust collector; The visual detection control component is electrically connected to the dust removal component to automatically switch to one of the five preset dust removal air volume gears according to different states of the constant flow iron tapping process at the iron outlet to effectively absorb dust while reducing energy consumption.

[0006] Furthermore, the iron mouth dust removal pipeline assembly includes a dust hood, a valve and a dust removal branch pipe. The dust collection hood is connected to the dust removal branch pipe; The valve is installed on the dust removal branch pipe.

[0007] Furthermore, the dust collector front main pipe assembly includes a first dust collector front main pipe, a second dust collector front main pipe, a connecting valve, a first dust collector inlet valve, a second dust collector inlet valve, a first pressure transmitter and a second pressure transmitter. The first dust collector front main pipe is connected to one end of the dust removal branch pipe located on the 1# iron outlet and the dust removal branch pipe located on the 2# iron outlet respectively, and the first dust collector front main pipe is connected to one group of dust removal components; The front main pipe of the second dust collector is connected to one end of the dust removal branch pipe located on the 3# iron outlet and the dust removal branch pipe located on the 4# iron outlet respectively, and the front main pipe of the second dust collector is connected to another set of dust removal components; The connecting valve connects the main pipe before the first dust collector and the main pipe before the second dust collector; The first dust collector inlet valve and the first pressure transmitter are both arranged on the front main pipe of the first dust collector; The second dust collector inlet valve and the second pressure transmitter are both arranged on the front main pipe of the second dust collector.

[0008] Furthermore, the dust removal assembly includes a first dust collector, a second dust collector, a first fan, a second fan and a chimney. The inlets of the first dust collector and the second dust collector are connected to the first dust collector front main pipe and the second dust collector front main pipe respectively; The inlets of the first fan and the second fan are respectively connected to the outlets of the first dust collector and the second dust collector; The chimney is connected to the outlet of the first fan and the outlet of the second fan.

[0009] Furthermore, the visual detection control component includes a camera, a computer and a PLC control panel. The camera is electrically connected to the computer to transmit the visually captured iron tapping state image to the computer in real time, and the camera corresponds to the iron tapping hole one by one; The computer, the first fan and the second fan are all electrically connected to the PLC control panel.

[0010] Furthermore, the dust suction points of the taphole dust removal pipeline assembly include the taphole top suction, taphole side suction, slag ditch, slag skimmer, residual iron ditch, and branch iron ditch, but do not include the swinging spout.

[0011] Furthermore, the first fan and the second fan are both variable frequency fans with the same variable frequency.

[0012] Furthermore, the maximum design air volume of the first dust collector and the second dust collector is the air volume required for simultaneous iron tapping from two iron tapping ports in a group.

[0013] Furthermore, it also includes a laser flow meter for detecting sudden splashing of abnormal flow and a thermal imager for real-time detection of whether the temperature gradient of molten iron is abnormal.

[0014] A method for intelligently adjusting the air volume of a blast furnace dust removal system comprises the following steps: S1: The dust removal air volume requirement for each taphole during the tapping process is set to five levels: high level for taphole opening and taphole blocking, medium level for the preparation stage before taphole opening and the middle of tapping, low level for 20 minutes after taphole blocking, ultra-high level for tapping when two tapholes overlap, and ultra-low level for no tapping. S2: When the PLC control panel receives the tapping preparation signal of a certain tapping hole, it automatically opens the valve in the tapping hole dust removal pipeline assembly corresponding to the tapping hole, and then automatically adjusts the frequency of the first and second fans to the middle position; S3: When the visual detection control component recognizes the opening machine of a certain tap hole, it automatically adjusts the frequency of the first and second fans to a high position; S4: When the visual detection control component identifies that a taphole is in the middle stage of tapping, it automatically adjusts the frequency of the first and second fans to the middle gear. S5: When the visual detection control component recognizes the action of the plugging machine of a certain taphole, it automatically adjusts the frequency of the first and second fans to a high position; S6: When the visual detection control component recognizes that a certain taphole is blocked, it automatically adjusts the frequency of the first and second fans to a medium gear and maintains it for 20 minutes. After 20 minutes, it automatically closes the valve in the taphole dust removal pipeline component at the taphole position, and then automatically adjusts the frequency of the first and second fans to an ultra-low gear. S7: When the visual inspection control component receives the information that there is overlapping tapping at the taphole (open taphole, blocked taphole, mid-tapping, 20 minutes after blocked taphole, any two of these four states overlap), it automatically adjusts the frequency of the first and second fans to the ultra-high position; S8: The ultra-low gear must ensure that the first and second fans cannot surge.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This application can match different air volume requirements according to different tapping conditions. Through five-speed graded control (ultra-low / low / medium / high / ultra-high), it can achieve precise matching of six working conditions such as tapping and tapping with dust removal air volume. The fan power consumption is reduced by 18%-25% (measured data), solving the contradiction of "energy consumption waste" or "smoke and dust emission" caused by traditional fixed air volume. 2. Relying on visual recognition + PLC linkage control, the valve opening and closing and fan frequency modulation response delay is less than 0.5 seconds (S2-S6 process), which is three times more efficient than manual operation and avoids the risk of human misjudgment. The dual-fan collaborative anti-surge design (S8) ensures ultra-low gear operation safety; 3. The air volume-operating condition matching model reduces the power consumption of dust removal by 2.3 kWh per ton of iron, saving approximately RMB 760,000 in annual costs (calculated based on an annual output of 2 million tons of molten iron). At the same time, it reduces the frequency of manual intervention in the dust removal system, enables timely system operation adjustments, saves manpower, and reduces reliance on operator experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Reference numerals: 1. Iron mouth dust removal pipeline assembly; 101. Dust hood; 102. Valve; 103. Dust removal branch pipe; 2. Dust collector front main pipe assembly; 201. First dust collector front main pipe; 202. Second dust collector front main pipe; 203. Connecting valve; 204. First dust collector inlet valve; 205. Second dust collector inlet valve; 206. First pressure transmitter; 207. Second pressure transmitter; 3. Dust removal assembly; 301. First dust collector; 302. Second dust collector; 303. First fan; 304. Second fan; 305. Chimney; 4. Visual inspection control assembly; 401. Camera; 402. Computer; 403. PLC control panel. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not 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. The present invention is further described in conjunction with the drawings and embodiments: like Figure 1 As shown, a blast furnace dust removal air volume intelligent adjustment system includes 1# taphole, 2# taphole, 3# taphole and 4# taphole, and also includes a taphole dust removal pipeline component 1, a dust collector front main pipe component 2, a dust removal component 3 and a visual detection control component 4. The taphole dust removal pipeline assembly 1 is arranged in one-to-one correspondence with the taphole; The two flow paths of the dust collector front main pipe assembly 2 are connected to the four sets of iron mouth dust removal pipeline assemblies 1 in pairs; The two groups of dust removal components 3 are respectively connected to the two flow paths of the dust collector front main pipe component 2; The visual detection control component 4 is electrically connected to the dust removal component to automatically switch to one of the five preset dust removal air volume gears according to different states of the constant flow iron tapping process at the iron outlet to effectively absorb dust while reducing energy consumption.

[0018] The specific implementation of the solution of the present invention is as follows: Figure 1 As shown, the iron mouth dust removal pipeline assembly 1 includes a dust hood 101, a valve 102 and a dust removal branch pipe 103. The dust collecting hood 101 is connected to the dust collecting branch pipe 103; The valve 102 is provided on the dust removal branch pipe 103; As a further refinement of the above embodiment, the dust suction points of each taphole dust removal pipeline assembly 1 include the taphole top suction, taphole side suction, slag ditch, slag skimmer, residual iron ditch, and branch iron ditch, but do not include the swinging nozzle.

[0019] The specific implementation of the solution of the present invention is as follows: Figure 1 As shown, the dust collector front main pipe assembly 2 includes a first dust collector front main pipe 201, a second dust collector front main pipe 202, a connecting valve 203, a first dust collector inlet valve 204, a second dust collector inlet valve 205, a first pressure transmitter 206 and a second pressure transmitter 207. The first dust collector front main pipe 201 is connected to one end of the dust removal branch pipe 103 located on the 1# iron outlet and the dust removal branch pipe 103 located on the 2# iron outlet, and the first dust collector front main pipe 201 is connected to one group of dust removal components 3; The second dust collector front main pipe 202 is connected to one end of the dust removal branch pipe 103 located on the 3# iron outlet and the dust removal branch pipe 103 located on the 4# iron outlet, and the second dust collector front main pipe 202 is connected to another set of dust removal components 3; The connecting valve 203 connects the first dust collector front main pipe 201 and the second dust collector front main pipe 202 (specifically, the connecting valve 203 is in a normally open state); The first dust collector inlet valve 204 and the first pressure transmitter 206 are both provided on the first dust collector front main pipe 201; The second dust collector inlet valve 205 and the second pressure transmitter 207 are both arranged on the second dust collector front main pipe 202 .

[0020] The specific implementation of the solution of the present invention is as follows: Figure 1 As shown, the dust removal assembly 3 includes a first dust collector 301, a second dust collector 302, a first fan 303, a second fan 304 and a chimney 305. The inlets of the first dust collector 301 and the second dust collector 302 are connected to the first dust collector front main pipe 201 and the second dust collector front main pipe 202 respectively; The inlets of the first fan 303 and the second fan 304 are respectively connected to the outlets of the first dust collector 301 and the second dust collector 302; The chimney 305 is connected to the outlet of the first fan 303 and the outlet of the second fan 304; As a further optimization of the above embodiment, the first fan 303 and the second fan 304 are variable frequency fans with the same frequency conversion frequency to dynamically adjust the air volume according to the smoke generation law of the iron outlet. They run at high speed to quickly capture smoke during iron tapping, and run at low speed to maintain basic ventilation during the intermittent period. Furthermore, the maximum design air volume of the first dust collector 301 and the second dust collector 302 is the air volume required for the two iron outlets in a group to simultaneously tap iron, so as to ensure that dust can be effectively absorbed when the iron outlets tap iron simultaneously.

[0021] The specific implementation of the solution of the present invention is as follows: Figure 1 As shown, the visual inspection control component 4 includes a camera 401, a computer 402 and a PLC control panel 403. The camera 401 is electrically connected to the computer 402 to transmit the visually captured iron tapping state image to the computer 402 in real time, and the camera 401 corresponds to the iron tapping hole one by one; The computer 402, the first fan 303 and the second fan 304 are all electrically connected to the PLC control panel 403 to automatically match the dust removal air volume of different gears according to different iron tapping states of the iron tapping port.

[0022] As a further optimization of the above embodiment, by fine-tuning the opening of the connecting valve 203, the difference between the first pressure transmitter 206 and the first pressure transmitter 207 is maintained within a certain range so that the air volume entering the two dust collectors tends to be consistent.

[0023] A method for intelligently adjusting the air volume of a blast furnace dust removal system is provided, wherein the method adopts the intelligent adjustment system for the air volume of a blast furnace dust removal system to: S1: The dust removal air volume requirement for each taphole during the tapping process is set to five levels: high level for taphole opening and taphole blocking, medium level for the preparation stage before taphole opening and the middle of tapping, low level for 20 minutes after taphole blocking, ultra-high level for tapping when two tapholes overlap, and ultra-low level for no tapping. S2: When the PLC control panel 403 receives a tapping preparation signal from a tapping hole, it automatically opens the valve 102 in the tapping dust removal pipeline assembly 1 corresponding to the tapping hole, and then automatically adjusts the frequency of the first and second fans to the middle position; S3: When the visual detection control component 4 recognizes the opening machine of a certain tap hole, it automatically adjusts the frequency of the first fan and the second fan to a high position; S4: When the visual detection control component 4 identifies that a taphole is in the middle stage of tapping, it automatically adjusts the frequency of the first and second fans to the middle gear. S5: When the visual detection control component 4 recognizes that the plugging machine of a certain taphole is in motion, it automatically adjusts the frequency of the first and second fans to a high level; S6: When the visual detection control component 4 recognizes that a certain taphole is blocked, it automatically adjusts the frequency of the first and second fans to a medium gear and maintains it for 20 minutes. After 20 minutes, it automatically closes the valve 102 in the taphole dust removal pipeline component 1 at the taphole position, and then automatically adjusts the frequency of the first and second fans to an ultra-low gear. S7: When the visual inspection control component 4 receives information that there is overlapping tapping at the tapping hole (open tapping hole, blocked tapping hole, mid-tapping, 20 minutes after blocked tapping hole, any two of these four states overlap), it automatically adjusts the frequency of the first and second fans to the ultra-high position. S8: The ultra-low gear must ensure that the first and second fans cannot surge.

[0024] In some embodiments, it also includes a laser flow meter for detecting sudden splashing of abnormal flow rate and a thermal imager for detecting whether the temperature gradient of molten iron is abnormal in real time; Typical working conditions: Sudden splash: When the laser detects a sudden increase in flow rate, it switches to the ultra-high position within 0.5 seconds; Taphole maintenance period: When thermal imaging shows abnormal temperature gradient, the device will automatically downgrade to protect the equipment.

[0025] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blast furnace dust removal air volume intelligent adjustment system, including 1# taphole, 2# taphole, 3# taphole and 4# taphole, characterized in that: It also includes an iron mouth dust removal pipeline assembly (1), a dust collector front main assembly (2), a dust removal assembly (3) and a visual detection control assembly (4). The taphole dust removal pipeline assembly (1) is arranged in one-to-one correspondence with the taphole; The dust collector front main pipe components (2) of the two flow paths are connected to the four sets of iron mouth dust removal pipeline components (1) in pairs; The two groups of dust removal components (3) are respectively connected to the two flow paths of the dust collector front main pipe component (2); The visual detection control component (4) is electrically connected to the dust removal component to automatically switch to one of the five preset dust removal air volume gears according to different states of the iron outlet constant flow iron tapping process to effectively remove dust while reducing energy consumption.

2. The intelligent adjustment system for blast furnace dust removal air volume according to claim 1, characterized in that: The iron mouth dust removal pipeline assembly (1) comprises a dust collection hood (101), a valve (102) and a dust removal branch pipe (103). The dust collecting hood (101) is connected to the dust collecting branch pipe (103); The valve (102) is arranged on the dust removal branch pipe (103).

3. The intelligent adjustment system for blast furnace dust removal air volume according to claim 2, characterized in that: The dust collector front main pipe assembly (2) comprises a first dust collector front main pipe (201), a second dust collector front main pipe (202), a connecting valve (203), a first dust collector inlet valve (204), a second dust collector inlet valve (205), a first pressure transmitter (206), and a second pressure transmitter (207). The first dust collector front main pipe (201) is respectively connected to one end of the dust removal branch pipe (103) located on the 1# iron outlet and the dust removal branch pipe (103) located on the 2# iron outlet, and the first dust collector front main pipe (201) is connected to one set of dust removal components (3); The second dust collector front main pipe (202) is respectively connected to one end of the dust removal branch pipe (103) located on the 3# iron outlet and the dust removal branch pipe (103) located on the 4# iron outlet, and the second dust collector front main pipe (202) is connected to another set of dust removal components (3); The connecting valve (203) connects the first dust collector front main pipe (201) and the second dust collector front main pipe (202); The first dust collector inlet valve (204) and the first pressure transmitter (206) are both arranged on the first dust collector front main pipe (201); The second dust collector inlet valve (205) and the second pressure transmitter (207) are both arranged on the second dust collector front main pipe (202).

4. The intelligent adjustment system for blast furnace dust removal air volume according to claim 3, characterized in that: The dust removal assembly (3) comprises a first dust collector (301), a second dust collector (302), a first fan (303), a second fan (304), and a chimney (305). The inlets of the first dust collector (301) and the second dust collector (302) are respectively connected to the first dust collector front main pipe (201) and the second dust collector front main pipe (202); The inlets of the first fan (303) and the second fan (304) are respectively connected to the outlets of the first dust collector (301) and the second dust collector (302); The chimney (305) is connected to the outlet of the first fan (303) and the outlet of the second fan (304).

5. The intelligent adjustment system for blast furnace dust removal air volume according to claim 4, characterized in that: The visual detection control component (4) includes a camera (401), a computer (402) and a PLC control panel (403). The camera (401) is electrically connected to the computer (402) to transmit the visually captured iron tapping state image to the computer (402) in real time, and the camera (401) corresponds to the iron tapping hole one by one; The computer (402), the first fan (303) and the second fan (304) are all electrically connected to the PLC control panel (403).

6. The intelligent adjustment system for blast furnace dust removal air volume according to claim 2, characterized in that: The dust suction points of the taphole dust removal pipeline assembly (1) include the taphole top suction, the taphole side suction, the slag ditch, the slag skimmer, the residual iron ditch, and the branch iron ditch, but do not include the swing spout.

7. The intelligent adjustment system for blast furnace dust removal air volume according to claim 4, characterized in that: The first fan (303) and the second fan (304) are both variable frequency fans with the same variable frequency.

8. The intelligent adjustment system for blast furnace dust removal air volume according to claim 4, characterized in that: The maximum designed air volume of the first dust collector (301) and the second dust collector (302) is the air volume required for simultaneous iron tapping from two iron tapping ports in a group.

9. The intelligent adjustment system for blast furnace dust removal air volume according to claim 1, characterized in that: It also includes a laser flow meter for detecting sudden splashing due to abnormal flow, and a thermal imager for real-time detection of abnormal temperature gradients in molten iron.

10. A method for intelligently adjusting the air volume of a blast furnace dust removal system, comprising: S1: The dust removal air volume requirement for each taphole during the tapping process is set to five levels: high level for taphole opening and taphole blocking, medium level for the preparation stage before taphole opening and the middle of tapping, low level for 20 minutes after taphole blocking, ultra-high level for tapping when two tapholes overlap, and ultra-low level for no tapping. S2: When the PLC control panel (403) receives a tapping preparation signal from a tapping hole, it automatically opens the valve (102) in the tapping dust removal pipeline assembly (1) corresponding to the tapping hole, and then automatically adjusts the frequency of the first fan and the second fan to the middle position; S3: When the visual detection control component (4) recognizes the opening machine of a certain tap hole, it automatically adjusts the frequency of the first fan and the second fan to a high position; S4: When the visual detection control component (4) recognizes that a tap hole is in the middle stage of tapping, it automatically adjusts the frequency of the first fan and the second fan to the middle position; S5: When the visual detection control component (4) recognizes that the plugging machine of a certain tap hole is in motion, the frequency of the first fan and the second fan is automatically adjusted to a high position; S6: When the visual detection control component (4) recognizes that a certain taphole has finished being blocked, it automatically adjusts the frequency of the first fan and the second fan to a medium gear and maintains it for 20 minutes. After 20 minutes, it automatically closes the valve (102) in the taphole dust removal pipeline component (1) at the taphole position, and then automatically adjusts the frequency of the first fan and the second fan to an ultra-low gear. S7: When the visual detection control component (4) receives the information that there is overlapping iron tapping at the tapping hole (open tapping hole, blocked tapping hole, mid-stage of iron tapping, 20 minutes after blocked tapping hole, any two of these four states overlap), it automatically adjusts the frequency of the first and second fans to the ultra-high position; S8: The ultra-low gear must ensure that the first and second fans cannot surge.

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