CN201306919Y - Damper control device of dust-removal system of electric furnace - Google Patents
Damper control device of dust-removal system of electric furnace Download PDFInfo
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- CN201306919Y CN201306919Y CNU2008201556895U CN200820155689U CN201306919Y CN 201306919 Y CN201306919 Y CN 201306919Y CN U2008201556895 U CNU2008201556895 U CN U2008201556895U CN 200820155689 U CN200820155689 U CN 200820155689U CN 201306919 Y CN201306919 Y CN 201306919Y
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- pressure sensor
- dust
- pressure
- electric furnace
- flue
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Abstract
The utility model discloses a damper control device of a dust-removal system of an electric furnace. A first pressure sensor of the control device is mounted in a highest position of a dust-removal flue of the electric furnace, where least slag is formed and the pressure is almost the same as the pressure inside the electric furnace, so as to effectively reduce the influence of slag and other interferences; and a second pressure sensor of the control device is mounted at the upper part of a combustion chamber of the dust-removal system, so that a detection signal of the second pressure sensor is input into a PLC I/O module and compared with a detection signal of the first pressure sensor. Therefore, a PLC control unit can not only judge whether the first pressure sensor is invalid or not and give an alarm, but also continue to measure the pressure and carry out damper control after the first pressure sensor is invalid, thereby ensuring that the dust-removing and air-exacting capacity of the dust-removal system is always matched with the pressure inside the electric furnace.
Description
Technical field
The utility model relates to the electric stove dust control technology, more particularly, relates to the baffle controls device of a kind of electric stove dust system, and this control device is effectively controlled the baffle openings degree, reduces the influence and the interference that are subjected to slag.
Background technology
The stainless steel steel-making enterprise is when carrying out the smelting of electric furnace hot metal charging, because the instantaneous generating capacity of flue gas is big, partial fume can't be escaped in the factory building outward by the timely and effective capture of petticoat pipe, and factory building dormer effusion workshop around passing through, and causes the factory building inner and outer pollution.Particularly ought require hot metal ratio to descend, under the situation that adding amount of scrap steel increases, need to use a large amount of frivolous steel scraps, the flue gas that can cause electric furnace to produce when hot metal charging is bigger, in case excessive and form tobacco, environment is caused great destruction.Therefore, must adopt the electric stove dust system that electric furnace flue gas is controlled and reclaimed.
See also shown in Figure 1, present electric stove dust system 10 adopts usually and offers a pilot port at electric furnace 1 bell top, a pressure sensor 11 is installed at the place in the pilot port, when electric furnace 1 is being smelted, this pressure sensor 11 can detect the pressure in electric furnace 1 stove, and feed back to the drive motors of exhausting pipeline 12 baffle plates 13 of dust pelletizing system 10 by control system, thereby the opening degree of control baffle plate 13, make the exhausting ability of dust pelletizing system 10 exhausting pipelines 12 change and change along with opening degree, flue gas is realized the purpose of dedusting by in the flue 14 suction combustion chambers 15 the most at last.But because the process characteristic that electric furnace 1 is smelted, the splash in the smelting causes the bell slagging scorification easily, and the pressure sensor 11 that makes electric furnace 1 bell top install lost efficacy, and causes the dust pelletizing system 10 can't operate as normal, does not reach the purpose of dedusting.And for the cleaning or the mediation of pilot port place slag, mainly contain dual mode: a kind of is to adopt compressed air to blow, another kind is that a hydraulic means is installed, carry out jacking with hydraulic cylinder, thereby mediation pilot port, but above-mentioned dual mode is thorough removing slag all, and the baffle plate 13 that finally causes being used to controlling opening degree can't be opened effectively and timely, has influenced dust removing effects greatly.In addition, electric current is big when smelting owing to electric furnace 1, and also big to the signal interference, just in time above bell, ionization electrode is very near for pressure sensor 11, signal often occurs and disturbs, and influences the normal delivery of pressure signal, is unfavorable for electric furnace 1 dedusting more.
The utility model content
At the above-mentioned shortcoming that exists in the prior art, the purpose of this utility model provides the baffle controls device of a kind of electric stove dust system, and this control device can reduce influence and other interference of slag, guarantees dust removing effects.
For achieving the above object, the utility model adopts following technical scheme:
The baffle controls device of this electric stove dust system comprises: first pressure sensor is installed on the highest point of electric stove dust flue; Second pressure sensor is installed on the top, combustion chamber of dust pelletizing system; Two absolute pressure transducers, input is connected to the output of first, second pressure sensor respectively; Programmable Logic Controller, input are connected to the input of two absolute pressure transducers respectively, and output is connected to the drive motors of exhausting pipeline baffle plate.
Described Programmable Logic Controller comprises PLC I/O module and PLC control module, and the input of PLC I/O module is connected with the output of two absolute pressure transducers respectively, and output is connected to the input of PLC control module; The output of PLC control module is connected to described drive motors.
This control device also comprises sound and light alarm module and operation screen alarm module, and the input of sound and light alarm module and operation screen alarm module is connected with the output of PLC control module respectively.
Described electric stove dust flue is the fixedly flue that is connected with electric furnace, and fixedly the highest point of flue has the pilot port, and flange is set on the pilot port, described first pressure sensor by flange and fixedly flue be connected and fixed.
In technique scheme, the baffle controls device of electric stove dust of the present utility model system is minimum by first pressure sensor being installed on slagging scorification, the highest point of the electric stove dust flue that pressure and electric furnace internal pressure are very nearly the same, thus influence and other interference of slag effectively reduced; And by second pressure sensor being installed on the top, combustion chamber of dust pelletizing system, the detection signal of detection signal being imported the PLC I/O module and first pressure sensor compares, not only can whether lose efficacy to first pressure sensor and judge and report to the police by the PLC control module, but also can be used in continuation pressure measurement and baffle controls after first pressure sensor lost efficacy, thereby the dedusting exhausting ability that guarantees dust pelletizing system is complementary with the electric furnace furnace pressure all the time.
Description of drawings
Fig. 1 is the scheme of installation of pressure sensor of the baffle controls device of prior art;
Fig. 2 is the scheme of installation of pressure sensor of the baffle controls device of electric stove dust of the present utility model system;
Fig. 3 is the structured flowchart of baffle controls device of the present utility model.
The specific embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
At first, the electric stove dust system is done simple the introduction, see also shown in Figure 2, electric stove dust system 10 is located at electric furnace 1 one sides, comprise the combustion chamber 15 that is used for smoke absorption and burning separation, the fixedly flue 141 that links to each other with electric furnace 1 bell top, the movable flue 142 that one end links to each other with 15 tops, combustion chamber, the exhausting pipeline 12 that links to each other with combustion chamber 15 1 sides, movable flue 142 other ends are connected with fixing flue 141, and when periodical repair, can remove movable flue 142 easy accesses, exhausting pipeline 12 is provided with baffle plate 13, baffle plate 13 is adjusted opening degree by drive motor, thereby adjusts the dedusting exhausting ability of exhausting pipeline 12.Baffle controls device of the present utility model is exactly to be used for the opening degree of this baffle plate 13 is controlled.
Please in conjunction with shown in Figure 3, this baffle controls device 20 comprises first pressure sensor 21, second pressure sensor 22, first, second two absolute pressure transducers and Programmable Logic Controller, first pressure sensor 21 is installed on the highest point of electric stove dust flue, this electric stove dust flue is the fixedly flue 141 that electric furnace is connected, have the pilot port at the fixing highest point of flue 141, and flange 16 is set on the pilot port, and first pressure sensor 21 is connected and fixed by flange 16 and fixing flue 141.By repeatedly field trial and measurement, the flue tube wall slagging scorification at this place is minimum, and it is minimum that ionization electrode is disturbed by signal, and the furnace pressure power that records pressure and the detection of original bell place at this place is very nearly the same, can count to be equal to.Second pressure sensor 22 then is installed on 15 tops, combustion chamber of dust pelletizing system 10, by repeatedly field trial and measurement, this place record pressure and furnace pressure has certain difference, but can be standard by the pressure that is detected with first pressure sensor 21, and both minimum and maximum pressures in smelting are compared, calculate their linear relationship, thereby can demarcate second pressure sensor 22, pass through actual detected, prove that both are about 1.25 by the correlation linear coefficient, promptly second pressure sensor, 22 detected pressures are 1.25 times of first pressure sensor, 21 detected pressures, timing signal, only need be with second pressure sensor, 22 detected pressures divided by coefficient correlation, its result can show and compare, and both can realize the mutual control purpose of two pressure sensors.First, second absolute pressure transducer all can adopt the 3151SA model of Xian Instrument Factory, its input is connected to the output of first, second pressure sensor 22 respectively, the pressure signal that reception records, and convert pressure signal to the signal of telecommunication (milliampere signal or millivolt signal); Programmable Logic Controller comprises PLC I/O module and PLC control module, the input of PLC I/O module is connected with the output of first, second absolute pressure transducer respectively, output is connected to the input of PLC control module, PLC I/O module receives the signal of telecommunication of first, second absolute pressure transducer input respectively, thereby compare, and comparison signal is inputed to the PLC control module; The output of PLC control module is connected to baffle plate 13 drive motors, and baffle plate 13 drive motors are handled and output control signals to the comparison signal that receives, the operation of control drive motors, and then the opening degree of control baffle plate 13.PLC I/O module can adopt the I/OTM-E15524-01 model of Siemens Company, and the PLC control module can adopt the CPU414-3 model of Siemens Company.This control device 20 also comprises sound and light alarm module and operation screen alarm module, the input of sound and light alarm module and operation screen alarm module is connected with the output of PLC control module respectively, and the control signal of reception PLC control module, report to the police thereby carry out sound, light and operation screen.
The concrete operation principle of this control device 20 is as follows:
One, at first, at the 1 smelting initial stage of electric furnace, the show value of first, second pressure sensor 22 is carried out Zero positioning, make its pressure show value all be shown as " 0 ", when electric furnace 1 began to smelt, whole electric furnace 1 was in the anaerobic job state, and furnace pressure is approximately 200Pa;
Two, at this moment, first, second pressure sensor 22 detected furnace pressures are identical, all be shown as 200Pa, PLC I/O module does not relatively have pressure reduction, the PLC control module is tentatively adjusted according to the furnace pressure control drive motor that first pressure sensor 21 detects, the opening degree of baffle plate 13 is reached about 60% ± 1, and continue fine setting control baffle plate 13 opening degrees to 60%.
Three, according to different smelting states, repeating step one and two, and the PLC control module furnace pressure measured according to first pressure sensor 21 are controlled the opening degree of baffle plate 13 by the corresponding linear relation, i.e. the every increase of pressure 10Pa then increases opening degree 1%; And in smelting process, the furnace pressure when aerobic is smelted is the highest, reaches 300Pa, and the opening degree of PLC control module control baffle plate 13 is 70%.
In above-mentioned steps, first pressure sensor 21 directly participates in control synchronously, and 22 of second pressure sensors provide detection signal to be used for comparison, do not participate in control.
Four, after electric furnace 1 smelting furnace number is more, the slag that produces can influence the result of use of first pressure sensor 21, in case receiving the comparison signal (pressure reduction) of PLC I/O module, the PLC control module surpasses when setting value (setting value generally is set at 30Pa), judge that first pressure sensor 21 lost efficacy, the PLC control module is sent control signal at once, make the sound and light alarm module carry out sound and light warning 30 seconds, carrying out picture by the operation screen alarm module simultaneously reports to the police, notify the maintainer to arrange maintenance, and the PLC control module is as the criterion with the detection signal of second pressure sensor 22, proceeds baffle plate 13 controls.This moment, pressure sensor quit work, and second pressure sensor 22 participates in control.
Five, treat the thorough overhaul scarfing cinder after, reactivate first pressure sensor 21, recover to participate in control to baffle plate 13.
In sum; the baffle controls device 20 of electric stove dust of the present utility model system can be according to smelting the different technological processes and the furnace pressure in stage; realize the dynamically control in real time of baffle plate 13 opening degrees; and avoided pressure sensor influenced by slag to greatest extent and electrode disturbs; guaranteed that dedusting exhausting ability is complementary with furnace pressure all the time; thereby avoid electric furnace 1 flue gas to leak, protected environment.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (4)
1. the baffle controls device of an electric stove dust system is characterized in that,
This control device comprises:
First pressure sensor is installed on the highest point of electric stove dust flue;
Second pressure sensor is installed on the top, combustion chamber of dust pelletizing system;
Two absolute pressure transducers, input is connected to the output of first, second pressure sensor respectively;
Programmable Logic Controller, input are connected to the input of two absolute pressure transducers respectively, and output is connected to the drive motors of exhausting pipeline baffle plate.
2. the baffle controls device of electric stove dust as claimed in claim 1 system is characterized in that:
Described Programmable Logic Controller comprises PLC I/O module and PLC control module, and the input of PLC I/O module is connected with the output of two absolute pressure transducers respectively, and output is connected to the input of PLC control module; The output of PLC control module is connected to described drive motors.
3. the baffle controls device of electric stove dust as claimed in claim 1 system is characterized in that:
This control device also comprises sound and light alarm module and operation screen alarm module, and the input of sound and light alarm module and operation screen alarm module is connected with the output of PLC control module respectively.
4. the baffle controls device of electric stove dust as claimed in claim 1 system is characterized in that:
Described electric stove dust flue is the fixedly flue that is connected with electric furnace, and fixedly the highest point of flue has the pilot port, and flange is set on the pilot port, described first pressure sensor by flange and fixedly flue be connected and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201556895U CN201306919Y (en) | 2008-11-21 | 2008-11-21 | Damper control device of dust-removal system of electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201556895U CN201306919Y (en) | 2008-11-21 | 2008-11-21 | Damper control device of dust-removal system of electric furnace |
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| Publication Number | Publication Date |
|---|---|
| CN201306919Y true CN201306919Y (en) | 2009-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201556895U Expired - Fee Related CN201306919Y (en) | 2008-11-21 | 2008-11-21 | Damper control device of dust-removal system of electric furnace |
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| CN (1) | CN201306919Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051309A (en) * | 2018-01-16 | 2018-05-18 | 福州中润电子科技有限公司 | A kind of monitoring device and its monitoring method of oil pump oil pressure |
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2008
- 2008-11-21 CN CNU2008201556895U patent/CN201306919Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051309A (en) * | 2018-01-16 | 2018-05-18 | 福州中润电子科技有限公司 | A kind of monitoring device and its monitoring method of oil pump oil pressure |
| CN108051309B (en) * | 2018-01-16 | 2024-03-15 | 福州中润电子科技有限公司 | Monitoring device and monitoring method for oil pressure of oil pump |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20161121 |