CN105238905A - Automatic dust removal device for low-frequency (LF) refining furnace and control method thereof - Google Patents
Automatic dust removal device for low-frequency (LF) refining furnace and control method thereof Download PDFInfo
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- CN105238905A CN105238905A CN201510627312.XA CN201510627312A CN105238905A CN 105238905 A CN105238905 A CN 105238905A CN 201510627312 A CN201510627312 A CN 201510627312A CN 105238905 A CN105238905 A CN 105238905A
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- dust removing
- refining furnace
- dust removal
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- removing valve
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Abstract
The invention relates to an automatic dust removal device for a low-frequency (LF) refining furnace. The automatic dust removal device comprises a dust removal main pipe and a dust removal fan which are arranged on the LF refining furnace. A smoke collection hood is fixedly arranged on the dust removal main pipe. A dust removal pipeline is arranged on one side of the smoke collection hood and provided with a dust removal valve. The automatic dust removal device further comprises a program logic controller (PLC) which is in circuit connection with the dust removal valve. Opening and closing of the dust removal valve is automatically controlled according to the working condition of the LF refining furnace, the speed of the dust removal fan is automatically adjusted, conditions are provided for energy conservation and consumption reduction, and energy waste is reduced.
Description
Technical field
The present invention relates to a kind of cleaning apparatus, a kind of cleaning apparatus for LF refining furnace, belongs to steel-making technical field of environment protection equipment specifically.
Background technology
At present, LF purifying method in steelmaking process, its principal feature adopts the method for ladle bottom blowing argon gas that molten steel is obtained to stir kinetic energy, and there is good desulfating and deoxidation effect same with induction stirring, be more conducive to middle inclusion floating, because ladle argon-blown technology is simpler and easily operate than electromagnetic mixing apparatus, facilitate the rapid popularization of LF technology.This LF purifying method refining unit used is called LF refining furnace.
But LF refining furnace can produce a large amount of high-temperature dusty gas in process of production, make the requirement that cannot meet national project construction, not only affect the safety and Health of laborer, huge pollution is also caused to surrounding enviroment simultaneously.At present, the smoke discharging dust removing system for LF refining furnace is mainly workshop access dedusting house steward, rear access fly-ash separator.General cleaning shaft is only equipped with manually-operated gate, and this manually-operated gate is only closed in the maintenance period, and all the other times open always, no matter whether produce load of dust remove and exist always, inevitably cause the long-term heavy-duty service of dedusting fan, cause energy dissipation.
Summary of the invention
The present invention is directed to the defect that prior art exists, propose a kind of reasonable in design, easy to use, good dedusting effect, and LF refining furnace cleaning apparatus and control method thereof that energy dissipation can be avoided.
Object of the present invention, a kind of LF refining furnace automatic dust removing apparatus, comprise and be arranged on dedusting house steward on LF refining furnace and dedusting fan, it is characterized in that: described dedusting house steward is fixed with smoke collecting cover, the side of described smoke collecting cover is provided with cleaning shaft, and described cleaning shaft is provided with dust removing valve.
The technical scheme that the present invention limits further is: aforesaid LF refining furnace cleaning apparatus, the import of cleaning shaft is corresponding with the exhanst gas outlet of smoke collecting cover.
Further, aforesaid LF refining furnace cleaning apparatus, smoke collecting cover is water cooling smoke collecting hood, comprises fume pipe and collecting hood, and the top of collecting hood is fixed in the air outlet of fume pipe, and inlet mouth is connected with dedusting house steward; Collecting hood is rounded.
Further, aforesaid LF refining furnace cleaning apparatus, dust removing valve is electrical dust-removing valve or pneumatic dust collection valve.
Further, aforesaid LF refining furnace cleaning apparatus, dust removing valve is connected by the control end of circuit with the PLC control device of LF refining furnace.
Further, the control method of aforesaid LF refining furnace cleaning apparatus, comprises the following steps:
Step one, when the buggy ladle in refining furnace arrives refining position, the bell of buggy ladle leaves high-order decline, and PLC control system controls dust removing valve and opens;
Step 2, when refining transformer is in gate-dividing state, and now feed in raw material and feed silk process without the need to carrying out, ladle bottom blowing flow is less than quiet wake turbulence amount simultaneously, then PLC control system controls dust removing valve and closes;
Step 3, when again start reinforced or feed silk process time, or ladle bottom blowing flow is greater than when quiet wake turbulence amount, and PLC control system controls dust removing valve and opens;
Step 4, complete above-mentioned operation after, the bell of buggy ladle rises, and is promoted to a high position or buggy ladle when leaving refining position, then PLC control system controls dust removing valve and closes.
Further, the control method of aforesaid LF refining furnace cleaning apparatus, in step I, the limit switch feedback signal of dust removing valve, by wireless signal access DI digital quantity input module, and by DO digital output module output switch control signal, with trip switch contactor, drive opening or closing of dust removing valve; PLC control system opens or closes dust removing valve automatically according to the actual working state of refining furnace, and whether judges dust removing valve normal operation according to the spacing feedback signal of switch.
Further, the control method of aforesaid LF refining furnace cleaning apparatus, each operating parameter of PLC control system and state are presented on the display screen of dedusting main control room, and show in real time trouble signal and report to the police.
Outstanding effect of the present invention is: the present invention can control the opening and closing of dust removing valve automatically according to on-the-spot actual condition, be dedusting fan automatic speed regulation, while avoiding environmental pollution, energy-conservationly can provide condition for energy-saving and cost-reducing, reduce energy dissipation.
The present invention is of a tightly knit structure, rationally distributed, easy to use and cost of manufacture is low, can satisfy the demand and carry out the market requirement of this work.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, is easier to understand, grasp to make technical solution of the present invention.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is process flow sheet of the present invention.
Fig. 3 is the schematic circuit of PLC control device of the present invention.
Embodiment
Embodiment
Originally executing the PLC control device used in example is existing LF refining furnace control device, for: Siemens S7-400, Rockwell ControlLogix series.
A kind of LF refining furnace cleaning apparatus that the present embodiment provides, structure as shown in Figure 1, comprise LF refining furnace 4, this LF refining furnace is provided with dedusting house steward 2 and dedusting fan, dedusting house steward is fixed with water cooling smoke collecting hood 1, and the side of smoke collecting cover is provided with cleaning shaft 3, the import of this cleaning shaft is corresponding with the exhanst gas outlet of smoke collecting cover, and there is gap layout each other, this gap is greater than the area of smoke collecting cover, so that smoke collecting cover realizes lifting work.Smoke collecting cover is water cooling smoke collecting hood, comprises fume pipe and collecting hood, and the top of collecting hood is fixed in the air outlet of fume pipe, and inlet mouth is connected with dedusting house steward; Collecting hood is rounded.
Cleaning shaft is provided with dust removing valve, and this dust removing valve is electrical dust-removing valve or pneumatic dust collection valve.And dust removing valve is connected by the control end of circuit with the PLC control device of LF refining furnace.
During the present embodiment work, first, when the buggy ladle in refining furnace arrives refining position, the bell of buggy ladle leaves high-order decline, and PLC control system controls dust removing valve and opens; The limit switch feedback signal of dust removing valve, by wireless signal access DI digital quantity input module, and by DO digital output module output switch control signal, with trip switch contactor, drives opening or closing of dust removing valve; PLC control system opens or closes dust removing valve automatically according to the actual working state of refining furnace, and whether judges dust removing valve normal operation according to the spacing feedback signal of switch.
Secondly, when refining transformer is in gate-dividing state, and now feed in raw material and feed silk process without the need to carrying out, ladle bottom blowing flow is less than quiet wake turbulence amount simultaneously, then PLC control system controls dust removing valve closedown;
Again, when again starting reinforced or hello silk process, or ladle bottom blowing flow is greater than when quiet wake turbulence amount, and PLC control system controls dust removing valve and opens;
Finally, after completing above-mentioned operation, the bell of buggy ladle rises, and is promoted to a high position or buggy ladle when leaving refining position, then PLC control system controls dust removing valve and closes.
Meanwhile, each operating parameter of PLC control system and state are presented on the display screen of dedusting main control room, and show in real time trouble signal and report to the police.
Realize thus, according to LF operating mode control LF dust removing valve automatically, realizing the automatic red-tape operati of dedusting.Make dust removing effects improve more than 20%, improve the pollution of environment, simultaneously for realizing the automatic speed regulation of dedusting fan, energy-saving and emission-reduction lay a good foundation.The PLC control device of this technical solution can utilize existing LF Refining Control System to realize, and not needing increases extra investment.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (8)
1. a LF refining furnace automatic dust removing apparatus, comprise and be arranged on dedusting house steward on LF refining furnace and dedusting fan, it is characterized in that: described dedusting house steward is fixed with smoke collecting cover, and the side of described smoke collecting cover is provided with cleaning shaft, and described cleaning shaft is provided with dust removing valve.
2. LF refining furnace automatic dust removing apparatus according to claim 1, is characterized in that: the import of described cleaning shaft is corresponding with the exhanst gas outlet of smoke collecting cover.
3. LF refining furnace automatic dust removing apparatus according to claim 1, it is characterized in that: described smoke collecting cover is water cooling smoke collecting hood, comprise fume pipe and collecting hood, the top of collecting hood is fixed in the air outlet of described fume pipe, and inlet mouth is connected with dedusting house steward; Described collecting hood is rounded.
4. LF refining furnace automatic dust removing apparatus according to claim 1, is characterized in that: described in
Dust removing valve is electrical dust-removing valve or pneumatic dust collection valve.
5. LF refining furnace automatic dust removing apparatus according to claim 1, is characterized in that: described dust removing valve is connected by the control end of circuit with the PLC control device of LF refining furnace.
6. the control method of LF refining furnace automatic dust removing apparatus according to claim 1, is characterized in that: comprise the following steps:
Step one, when the buggy ladle in refining furnace arrives refining position, smoke collecting cover declines, and is covered on ladle, and simultaneously the bell of buggy ladle leaves high-order decline, and PLC control system controls dust removing valve and opens;
Step 2, when refining transformer is in gate-dividing state, and now feed in raw material and feed silk process without the need to carrying out, ladle bottom blowing flow is less than quiet wake turbulence amount simultaneously, then PLC control system controls dust removing valve and closes;
Step 3, when again start reinforced or feed silk process time, or ladle bottom blowing flow is greater than when quiet wake turbulence amount, and PLC control system controls dust removing valve and opens;
Step 4, complete above-mentioned operation after, the bell of buggy ladle rises, and is promoted to a high position or buggy ladle when leaving refining position, then PLC control system controls dust removing valve and closes.
7. the control method of LF refining furnace automatic dust removing apparatus according to claim 6, it is characterized in that: in described step I, the limit switch feedback signal of dust removing valve, by wireless signal access DI digital quantity input module, and by DO digital output module output switch control signal, with trip switch contactor, drive opening or closing of dust removing valve; PLC control system opens or closes dust removing valve automatically according to the actual working state of refining furnace, and whether judges dust removing valve normal operation according to the spacing feedback signal of switch.
8. the control method of LF refining furnace automatic dust removing apparatus according to claim 6, is characterized in that: each operating parameter of described PLC control system and state are presented on the display screen of dedusting main control room, and shows in real time trouble signal and report to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627312.XA CN105238905A (en) | 2015-09-28 | 2015-09-28 | Automatic dust removal device for low-frequency (LF) refining furnace and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510627312.XA CN105238905A (en) | 2015-09-28 | 2015-09-28 | Automatic dust removal device for low-frequency (LF) refining furnace and control method thereof |
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| CN105238905A true CN105238905A (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510627312.XA Pending CN105238905A (en) | 2015-09-28 | 2015-09-28 | Automatic dust removal device for low-frequency (LF) refining furnace and control method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559995A (en) * | 2012-02-29 | 2012-07-11 | 攀钢集团西昌钢钒有限公司 | Water-cooled furnace lid for refined-smelting ladle furnace, and slag removal method of dust-proof flue of water-cooled furnace lid |
| CN205062113U (en) * | 2015-09-28 | 2016-03-02 | 南京钢铁股份有限公司 | LF refining furnace dust collector |
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2015
- 2015-09-28 CN CN201510627312.XA patent/CN105238905A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559995A (en) * | 2012-02-29 | 2012-07-11 | 攀钢集团西昌钢钒有限公司 | Water-cooled furnace lid for refined-smelting ladle furnace, and slag removal method of dust-proof flue of water-cooled furnace lid |
| CN205062113U (en) * | 2015-09-28 | 2016-03-02 | 南京钢铁股份有限公司 | LF refining furnace dust collector |
Non-Patent Citations (1)
| Title |
|---|
| 巩婉峰 等: "新疆八一钢厂70t直流电弧炉烟气净化***", 《钢铁技术》 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160113 |
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| RJ01 | Rejection of invention patent application after publication |