CN205055695U - Two cold -zone highly -compressed air impurity filtration system of continuous casting - Google Patents
Two cold -zone highly -compressed air impurity filtration system of continuous casting Download PDFInfo
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- CN205055695U CN205055695U CN201520828539.6U CN201520828539U CN205055695U CN 205055695 U CN205055695 U CN 205055695U CN 201520828539 U CN201520828539 U CN 201520828539U CN 205055695 U CN205055695 U CN 205055695U
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Abstract
The utility model relates to a two cold -zone highly -compressed air impurity filtration system of continuous casting, include by the clean room, install impurity filter equipment who constitutes in the intake pipe of clean room both sides and outlet duct, dust collecting chamber with blow off pipe that the dust collecting chamber is connected and the dust removal control system who constitutes by computer, continuous casting production schedule PLC, two cold -zone highly -compressed air PLC, entry PLC, export PLC, blowback nitrogen gas PLC, blowdown PLC and sound generating mechanism, there is airstrainer clean room inside, and entry installation blowback nitrogen gas solenoid valve, blow off pipe export installation drain solenoid valve are managed to intake pipe entry installation air inlet solenoid valve, export installation gas outlet solenoid valve, blowback nitrogen gas, the pipe wall mounting intake pressure sensor of intake pipe and outlet duct and the pressure sensor that gives vent to anger, the utility model discloses realize that impurity filters, airstrainer operating condition assesses and sweep three kinds of functions voluntarily that can guarantee highly -compressed air's quality when effectively stablizing highly -compressed air pressure for a long time, the benefit is showing.
Description
Technical field
The utility model relates to the system that impurity in pressure-air filters in the cooling procedure of secondary cooling area for continuous casting, belongs to air filter unit technical field.
Background technology
Secondary cooling area for continuous casting adopts air-water atomization cooling technology to cool strand, air-water atomization cooling technology refers to that water droplet is atomized further by the energy utilizing pressure-air in nozzle, make that the drop diameter of ejection diminishes, speed increase, water spray area increases, this technology have cooling evenly, the advantage that efficient and controllability is strong, " gas " and " water " in air-water atomization cooling technology is carried mainly through High Pressure Air Pipe Line and cooling water pipeline, in process of production, owing to inevitably having moisture in pressure-air, cause inner-walls of duct surface mass oxidized, peel off, thisly peel off the terminal that the oxide impurity got off can be purged to pipeline in a large number, thus enter in nozzle the blocking causing nozzle, the atomization ability of nozzle is significantly declined, such one side can cause the water smoke of ejection cannot the surface of the whole strand of uniform fold, cause the non-uniform temperature of casting billet surface, even can be mingled with oarse-grained water droplet in water smoke, casting billet surface is caused to occur abnormal low temperature point and occur face crack, nozzle also can be caused time serious to spray water, cause strand bleed-out, distortion, and generation face crack, the slab quality defects such as internal segregation, What is more can damage continuous casting installation for casting, thus badly influence the stable operation of slab quality and continuous casting production.Therefore, effectively remove the oxide impurity in two cold-zone pressure-airs, for lifting air-water atomization cooling effect, guarantee slab quality, ensure that the normal operation tool of continuous casting installation for casting is of great significance.
The method eliminating impurity in two cold-zone pressure-airs in prior art mainly contains three kinds, one is by measures such as purification, dryings, remove the moisture in pressure-air, thus avoid the corrosion to conveyance conduit inside, remove oxide impurity, but this method cannot remove the moisture in pressure-air completely, the oxide impurity because it occurs the corrosion of conveying pipeline inner wall also just cannot be avoided completely; Two is strengthen equipment point-detecting, changes blocked nozzle in time, thus guarantees air-water atomization cooling effect.But this method can increase the labour intensity of Field Force on the one hand, has influence on actual spot check effect, can increase spare part expense on the other hand, thus have influence on production cost; The third method installs a filter screen in High Pressure Air Pipe Line, thus the oxide impurity filtered out in pressure-air, this method is better at use initial performances, the oxide impurity in pressure-air can be filtered out preferably, guarantee air-water atomizing effect, but because it installs comparatively complicated, therefore screen pack is not easy to change, thus cannot guarantee the maintenance period of equipment; And after the filtration of long period, screen pack surface can block by oxide impurity, cause the operating pressure of pressure-air to decline, thus directly have influence on air-water atomizing effect; In addition, this method cannot feedback information, and field personnel cannot the current state of Timeliness coverage screen pack, therefore cannot change timely according to its actual working state.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of secondary cooling area for continuous casting pressure-air contaminant filter system, by increasing pressure-air dedusting control system and the improvement to filter, realize real-time monitoring and the automated cleaning of filter duty, remove oxide impurity wherein, thus the quality of pressure-air can be guaranteed while permanently effective stable high voltage air pressure, solve background technology defect.
The technical scheme solved the problems of the technologies described above is:
Secondary cooling area for continuous casting pressure-air contaminant filter system, comprise device for filtering impurities and dedusting control system, device for filtering impurities is by dirt pocket, be installed on air inlet pipe and the escape pipe of dirt pocket both sides, be installed on the dust storage chamber be communicated with dirt pocket bottom dirt pocket and the blow-off pipe be connected with dust storage chamber lower part outlet is formed, dirt pocket top is provided with seal cover, mounted inside has airstrainer, air inlet pipe porch is installed into gas port magnetic valve, escape pipe outlet is connected with air-mist nozzle, installation gas outlet, exit magnetic valve, escape pipe sidewall is communicated with blowback nitrogen tube, blowback nitrogen magnetic valve is installed in blowback nitrogen tube porch, sewage draining exit magnetic valve is installed in blow-off pipe exit, the tube wall of air inlet pipe and escape pipe is also provided with air inlet pressure sensor and outlet pressure sensor, dedusting control system by computer, respectively with computer be connected carry out data communication continuous casting production scheduling PLC, two cold-zone pressure-air PLC, entrance PLC, export PLC, blowback nitrogen PLC, blowdown PLC and sound-producing device and form, entrance PLC is connected with air inlet pressure sensor with air inlet magnetic valve, and outlet PLC is connected with outlet pressure sensor with gas outlet magnetic valve, and blowback nitrogen PLC, blowdown PLC are connected with sewage draining exit magnetic valve with blowback nitrogen magnetic valve respectively.
Above-mentioned secondary cooling area for continuous casting pressure-air contaminant filter system, the cylindrical shape airstrainer of described airstrainer to be cross section be T font, described dirt pocket inwall is fixed with annular backup pad along its circumference, along being arranged in annular backup pad in airstrainer T font; Described dust storage chamber funnel, blow-off pipe is connected with the outlet of funnel-form dust storage chamber.
Use step of the present utility model is:
Step 1: continuous casting " casting starts " command signal fed back in the computer real-time acquisition continuous casting production scheduling PLC in dedusting control system and " casting stops " command signal;
Step 2: after computer receives " casting starts " command signal, command signal is sent to entrance PLC, outlet PLC, blowback nitrogen PLC and blowdown PLC, air inlet magnetic valve and gas outlet magnetic valve are opened, by sewage draining exit magnetic valve and blowback nitrogen closed electromagnetic valve, now, the airstrainer of pressure-air under ambient pressure effect in dirt pocket enters in air-mist nozzle, realizes the function that pressure-air is filtered dedusting;
Step 3: after computer receives " casting stops " command signal, sends command signal, by air inlet magnetic valve and gas outlet closed electromagnetic valve to entrance PLC, outlet PLC; Send command signal to blowback nitrogen PLC and blowdown PLC, sewage draining exit magnetic valve and blowback nitrogen magnetic valve are opened; Now, high pressure nitrogen will enter in dirt pocket through blowback nitrogen tube and carry out anti-purge to airstrainer under the effect of ambient pressure; Purge from airstrainer the oxide impurity got off can fall in dust storage chamber, and discharge through blow-off pipe under the effect of nitrogen pressure;
Step 4: purge after duration continues to purge according to the nitrogen established in computer is fixing, computer is again respectively to entrance PLC, outlet PLC, blowback nitrogen PLC and blowdown PLC sends command signal, air inlet magnetic valve and gas outlet magnetic valve are opened, by sewage draining exit magnetic valve and blowback nitrogen closed electromagnetic valve, now pressure-air enters dirt pocket by under the effect of ambient pressure, and fix duration according to the pressure-air established in computer and continue to blow, in air blowing process, computer carries out record to gassing time, and with 1s for the cycle constantly gathers the gas pressure value that air inlet pressure sensor and outlet pressure sensor feed back, following operation is carried out according to program of establishing in computer:
(1) first computer records the import of current time air inlet pipe and the outlet pressure difference △ P of escape pipe;
(2) gassing time reaches in computer after the pressure-air established fixes duration, and computer draws the pressure differential mean value within this time period
Step 5: computer sends command signal to entrance PLC, closes air inlet magnetic valve, then basis
size utilize the duty of built-in program of computer to airstrainer to assess, specifically:
(1) when
when value is within the scope of 0.03 ~ 0.08MPa, then computer is thought by clean for airstrainer purging, knot oxide impurity is not stained with again in its surface, now, computer can send airstrainer by sound-producing device to field personnel and clean clean information, shows that this filtration system can be carried out next and be watered secondary continuous casting production;
(2) when
when value is greater than 0.08MPa, then computer thinks that its surface also speckles with more oxide impurity not yet by clean for airstrainer cleaning, then computer after wait 1min, will repeat the operation of step 3 ~ step 5, and then detect
value, if when the size of this value is within the scope of 0.03 ~ 0.08MPa, then computer can send airstrainer by sound-producing device to field personnel and clean clean information; If this value is still greater than 0.08MPa, then continues to repeat the operation of step 3 ~ step 5, repeat 3 times at the most, if after repeating purging 3 times
value is still greater than 0.08MPa, then computer can send by sound-producing device the information need changing airstrainer to field personnel;
(3) when
when value is less than 0.03MPa, then computer thinks that this airstrainer is damaged, cannot carry on air filtration work, then computer can send by sound-producing device the information need changing airstrainer to field personnel;
Step 6: computer is after completing the assessment to airstrainer duty, command signal can be sent to entrance PLC, outlet PLC, blowback nitrogen PLC and blowdown PLC simultaneously, by air inlet magnetic valve, gas outlet magnetic valve, sewage draining exit magnetic valve and blowback nitrogen closed electromagnetic valve, avoid oxide impurity to enter dirt pocket, and wait for that next continuous casting waters secondary beginning.
The using method of above-mentioned secondary cooling area for continuous casting pressure-air contaminant filter system, in described step 3, in blowback nitrogen tube, nitrogen pressure is 0.6 ~ 0.8MPa; The fixing duration that purges of the nitrogen set in described step 4 Computer is as 3 ~ 4min, and it is 5 ~ 6min that pressure-air fixes duration.
The beneficial effects of the utility model are:
The utility model is on the basis of improving device for filtering impurities structure, set up dedusting control system to be connected with the communication of device for filtering impurities, realize contaminant filter, airstrainer working state evaluation and airstrainer automatic blowing three kinds of functions, thus can for a long time, stable, effectively provide clean pressure-air to air-mist nozzle, ensure that the steady implementation of secondary cooling area for continuous casting air-water atomization process for cooling; Solve efficient, the stable difficult problem safeguarded of filtration and filter plant of impurity in two cold-zone pressure-airs in long-standing problem continuous casting production process, to improving slab quality and keeping the stable operation of continuous casting production to play vital effect, there is significant economic benefit, have great popularizing value in industry.
Accompanying drawing explanation
Fig. 1 is device for filtering impurities schematic diagram;
Fig. 2 is airstrainer schematic diagram;
Fig. 3 is dedusting control system connection diagram;
Fig. 4 is that pressure-air filters control flow chart;
Be labeled as in figure: dirt pocket 1, air inlet pipe 2, escape pipe 3, dust storage chamber 4, blow-off pipe 5, seal cover 6, airstrainer 7, air inlet magnetic valve 8, air-mist nozzle 9, gas outlet magnetic valve 10, blowback nitrogen tube 11, blowback nitrogen magnetic valve 12, sewage draining exit magnetic valve 13, air inlet pressure sensor 14, outlet pressure sensor 15, annular backup pad 16, continuous casting production scheduling PLC17, two cold-zone pressure-air PLC18, entrance PLC19, outlet PLC20, blowback nitrogen PLC21, blowdown PLC22, sound-producing device 23, computer 24.
Detailed description of the invention
Fig. 1 and Fig. 2 shows, the utility model device for filtering impurities is by dirt pocket 1, be installed on dirt pocket 1 both sides and the air inlet pipe 2 be communicated with it and escape pipe 3, be installed on the dust storage chamber 4 be communicated with dirt pocket 1 bottom dirt pocket 1 and the blow-off pipe 5 be connected with dust storage chamber 4 lower part outlet is formed, the top of dirt pocket 1 is provided with seal cover 6, mounted inside has airstrainer 7, airstrainer 7 for cross section be the cylindrical shape airstrainer of T font, the inwall of dirt pocket 1 is installed with annular backup pad 16 along its circumference, along being arranged in annular backup pad 16 in the T font of airstrainer 7, the drum diameter of airstrainer 7 and the internal diameter of annular backup pad 16 match, dust storage chamber 4 funnel, blow-off pipe 5 is connected with the outlet of funnel-form dust storage chamber 4, the porch of air inlet pipe 2 is installed into gas port magnetic valve 8, the outlet of escape pipe 3 is connected with air-mist nozzle 9, installation gas outlet, exit magnetic valve 10, the sidewall of escape pipe 3 is communicated with blowback nitrogen tube 11, blowback nitrogen magnetic valve 12 is installed in the porch of blowback nitrogen tube 11, and sewage draining exit magnetic valve 13 is installed in the exit of blow-off pipe 5, the tube wall of air inlet pipe 2 and escape pipe 3 is also provided with air inlet pressure sensor 14 and outlet pressure sensor 15, for measuring the throughput of air inlet pipe 2 and escape pipe 3 mesohigh air.
Fig. 3 shows, dedusting control system by computer 24, respectively with computer 24 be connected carry out data communication continuous casting production scheduling PLC17, two cold-zone pressure-air PLC18, entrance PLC19, export PLC20, blowback nitrogen PLC21, blowdown PLC22 and sound-producing device 23 and form; Entrance PLC19 is connected with air inlet pressure sensor 14 with air inlet magnetic valve 8, outlet PLC20 is connected with outlet pressure sensor 15 with gas outlet magnetic valve 10, and blowback nitrogen PLC21, blowdown PLC22 are connected with sewage draining exit magnetic valve 13 with blowback nitrogen magnetic valve 12 respectively.
Fig. 4 shows, and when using the utility model, comprises following steps:
Step 1: continuous casting " casting starts " command signal fed back in the computer 24 Real-time Collection continuous casting production scheduling PLC17 in dedusting control system and " casting stops " command signal;
Step 2: after computer 24 receives " casting starts " command signal, command signal is sent to entrance PLC19, outlet PLC20, blowback nitrogen PLC21 and blowdown PLC22, air inlet magnetic valve 8 and gas outlet magnetic valve 10 are opened, sewage draining exit magnetic valve 13 and blowback nitrogen magnetic valve 12 are closed, now, the airstrainer 7 of pressure-air under ambient pressure effect in dirt pocket 1 enters in air-mist nozzle 9, realizes the function that pressure-air is filtered dedusting;
Step 3: after computer 24 receives " casting stops " command signal, sends command signal to entrance PLC19, outlet PLC20, air inlet magnetic valve 8 and gas outlet magnetic valve 10 is closed; Send command signal to blowback nitrogen PLC21 and blowdown PLC22, sewage draining exit magnetic valve 13 and blowback nitrogen magnetic valve 12 are opened; Now, high pressure nitrogen will enter in dirt pocket 1 through blowback nitrogen tube 11 and carry out anti-purge to airstrainer 7 under the effect of ambient pressure, and high pressure nitrogen pressure is 0.6 ~ 0.8MPa; Purge from airstrainer 7 oxide impurity got off can fall in dust storage chamber 4, and discharge through blow-off pipe 5 under the effect of nitrogen pressure;
Step 4: purge after duration continues purging 3 ~ 4min according to the nitrogen established in computer 24 is fixing, computer 24 is again respectively to entrance PLC19, outlet PLC20, blowback nitrogen PLC21 and blowdown PLC22 sends command signal, air inlet magnetic valve 8 and gas outlet magnetic valve 10 are opened, sewage draining exit magnetic valve 13 and blowback nitrogen magnetic valve 12 are closed, now pressure-air enters dirt pocket 1 by under the effect of ambient pressure, and fix duration according to the pressure-air established in computer 24 and continue air blowing 5 ~ 6min, in air blowing process, computer 24 pairs of gassing times carry out record, and with 1s for the cycle constantly gathers the gas pressure value that air inlet pressure sensor 14 and outlet pressure sensor 15 feed back, following operation is carried out according to program of establishing in computer 24:
(1), first computer 24 records the import of current time air inlet pipe 2 and the outlet pressure difference △ P of escape pipe 3;
(2), gassing time reaches in computer after the pressure-air established fixes duration 5 ~ 6min, and computer 24 draws the pressure differential mean value within this time period
Step 5: computer 24 sends command signal to entrance PLC19, closes air inlet magnetic valve 8, then basis
size utilize the duty of built-in program of computer to airstrainer 7 to assess, specifically:
(1), when
when value is within the scope of 0.03 ~ 0.08MPa, then computer 24 is thought and is purged by airstrainer 7 totally, knot oxide impurity is not stained with again in its surface, now, computer 24 can send airstrainer 7 by sound-producing device 23 to field personnel and clean clean information, shows that this filtration system can be carried out next and be watered secondary continuous casting production;
(2), when
when value is greater than 0.08MPa, then computer 24 is thought and is not yet cleaned totally by airstrainer 7, and its surface also speckles with more oxide impurity, then computer 24 after wait 1min, will repeat the operation of step 3 ~ step 5, and then detect
value, if when the size of this value is within the scope of 0.03 ~ 0.08MPa, then computer 24 can send airstrainer 7 by sound-producing device 23 to field personnel and cleaned clean information; If this value is still greater than 0.08MPa, then continues to repeat the operation of step 3 ~ step 5, repeat 3 times at the most, if after repeating purging 3 times
value is still greater than 0.08MPa, then computer 24 can send by sound-producing device 23 information need changing airstrainer 7 to field personnel;
(3), when
when value is less than 0.03MPa, then computer 24 thinks that this airstrainer 7 is damaged, cannot carry on air filtration work, then computer 24 can send by sound-producing device 23 information need changing airstrainer 7 to field personnel;
Step 6: computer 24 is after completing the assessment to airstrainer 7 duty, command signal can be sent to entrance PLC19, outlet PLC20, blowback nitrogen PLC21 and blowdown PLC22 simultaneously, air inlet magnetic valve 8, gas outlet magnetic valve 10, sewage draining exit magnetic valve 13 and blowback nitrogen magnetic valve 12 are closed, avoid oxide impurity to enter dirt pocket 1, and wait for that next continuous casting waters secondary beginning.
Claims (2)
1. secondary cooling area for continuous casting pressure-air contaminant filter system, it is characterized in that: it comprises device for filtering impurities and dedusting control system, device for filtering impurities is by dirt pocket (1), be installed on air inlet pipe (2) and the escape pipe (3) of dirt pocket (1) both sides, be installed on the dust storage chamber (4) be communicated with dirt pocket (1) bottom dirt pocket (1) and form the blow-off pipe (5) be connected with dust storage chamber (4) lower part outlet, dirt pocket (1) top is provided with seal cover (6), mounted inside has airstrainer (7), air inlet pipe (2) porch is installed into gas port magnetic valve (8), escape pipe (3) outlet is connected with air-mist nozzle (9), installation gas outlet, exit magnetic valve (10), the sidewall of escape pipe (3) is communicated with blowback nitrogen tube (11), blowback nitrogen magnetic valve (12) is installed in blowback nitrogen tube (11) porch, sewage draining exit magnetic valve (13) is installed in the exit of blow-off pipe (5), the tube wall of air inlet pipe (2) and escape pipe (3) is also provided with air inlet pressure sensor (14) and outlet pressure sensor (15), dedusting control system by computer (24), respectively with computer (24) be connected carry out data communication continuous casting production scheduling PLC (17), two cold-zones pressure-air PLC (18), entrance PLC (19), export PLC (20), blowback nitrogen PLC (21), blowdown PLC (22) and sound-producing device (23) and form, entrance PLC (19) is connected with air inlet pressure sensor (14) with air inlet magnetic valve (8), outlet PLC (20) is connected with outlet pressure sensor (15) with gas outlet magnetic valve (10), and blowback nitrogen PLC (21), blowdown PLC (22) are connected with sewage draining exit magnetic valve (13) with blowback nitrogen magnetic valve (12) respectively.
2. secondary cooling area for continuous casting as claimed in claim 1 pressure-air contaminant filter system, it is characterized in that: described airstrainer (7) for cross section be the cylindrical shape airstrainer of T font, described dirt pocket (1) inwall is fixed with annular backup pad (16) along its circumference, along being arranged in annular backup pad (16) in the T font of airstrainer (7); Described dust storage chamber (4) funnel, blow-off pipe (5) is connected with the outlet of funnel-form dust storage chamber (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828539.6U CN205055695U (en) | 2015-10-23 | 2015-10-23 | Two cold -zone highly -compressed air impurity filtration system of continuous casting |
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|---|---|---|---|
| CN201520828539.6U CN205055695U (en) | 2015-10-23 | 2015-10-23 | Two cold -zone highly -compressed air impurity filtration system of continuous casting |
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| CN205055695U true CN205055695U (en) | 2016-03-02 |
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| CN201520828539.6U Expired - Fee Related CN205055695U (en) | 2015-10-23 | 2015-10-23 | Two cold -zone highly -compressed air impurity filtration system of continuous casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363295A (en) * | 2015-10-23 | 2016-03-02 | 河北钢铁股份有限公司邯郸分公司 | Continuous casting secondary cooling zone high-pressure air impurity filtering system and using method thereof |
-
2015
- 2015-10-23 CN CN201520828539.6U patent/CN205055695U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105363295A (en) * | 2015-10-23 | 2016-03-02 | 河北钢铁股份有限公司邯郸分公司 | Continuous casting secondary cooling zone high-pressure air impurity filtering system and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 232, Fuxing Road, Fuxing District, Handan, Hebei Province Patentee after: River steel Limited by Share Ltd Handan branch Address before: 056015 Fuxing Road 232, Hebei, Handan Patentee before: Handan Branch Company of Hebei Iron and Steel Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20191023 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |