CN201014920Y - Rotary kiln negative pressure safety interlocking control system - Google Patents
Rotary kiln negative pressure safety interlocking control system Download PDFInfo
- Publication number
- CN201014920Y CN201014920Y CNU2006200369549U CN200620036954U CN201014920Y CN 201014920 Y CN201014920 Y CN 201014920Y CN U2006200369549 U CNU2006200369549 U CN U2006200369549U CN 200620036954 U CN200620036954 U CN 200620036954U CN 201014920 Y CN201014920 Y CN 201014920Y
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- CN
- China
- Prior art keywords
- flue
- rotary kiln
- rotary furnace
- negative pressure
- chimney
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002918 waste heat Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000013024 troubleshooting Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 19
- 239000003546 flue gas Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 101710200914 1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase 1 Proteins 0.000 description 1
- 101100520231 Caenorhabditis elegans plc-3 gene Proteins 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Abstract
The utility model relates to a safety control technology for a rotary furnace, in particular to a negative pressure safety interlocking control system for a rotary furnace in the event of the sudden shutdown of the draught fan of the rotary furnace. A bypass chimney flue is arranged between the rotary furnace and the chimney of the rotary furnace, and communicated with the main chimney flue and the chimney of the rotary furnace. A chimney flue flashboard is provided at the joint, and the action of the chimney flue flashboard is controlled by a chimney flue flashboard electric actuator. A pre-calcination feeding electric plate is arranged at the feeding pipe of the rotary furnace. A frequency converter is respectively provided for a secondary air power motor and a tertiary air power motor, and a pressure sensor is respectively equipped at the inlet of the draught fan and the melting chamber of the residual heat boiler. The utility model realizes the automatic interlocking control, makes troubleshooting more timely, reduces the labor strength of people, and effectively ensures the personal and equipment safety in the production process of the rotary furnace. The utility model is applicable when a sudden shutdown of the draught fan of a carbon rotary furnace is under troubleshooting.
Description
Technical field
The utility model relates to a kind of rotary kiln safety control technology, specifically relates to the rotary kiln negative pressure safety interlocking control system behind the unexpected machine halt trouble of a kind of rotary kiln air-introduced machine.
Background technology
The rotary kiln air-introduced machine is mounted in a useless flue gas that produces when being used for extracting calcined by rotary kiln out specially of waste heat boiler afterbody, keeps the certain negative pressure state in the rotary kiln thereby make, and guarantees the Thermal Equipment of normal heat transfer, mass transport process in the kiln.If air-introduced machine is barrier shutdown suddenly for some reason in process of production; and rotary kiln continues feed before forging; combustion air and auxiliary fuel be input as before still; will make and reach the interior storage of whole smoke evacuation pipeline in the kiln and assemble a large amount of waste heat flue gas that contains combustible component and oxygen; after flue gas concentration acquires a certain degree; the instantaneous violent burning of the combustible component accident of blasting; form serious threat, the personal safety that can jeopardize the operator when serious will for the safety of rotary kiln, waste heat boiler, water dust scrubber etc.Therefore, under the situation that air-introduced machine is shut down suddenly, must in time take correct counter-measure.Present safety operation technical regulation, need take manually to stop to forge preceding feeding device at the scene, manual-lock is forged preceding feed plate, manual unlocking by-pass flue flashboard cuts out kiln hood jet for gas slide valve, turn on the gas-fire and diffuse valve, stop two, three sequence of operations such as combustion fan.These operating process must the operator be gone to the scene and are carried out one by one from the control room, need the long time.Because at present the running status of air-introduced machine does not have signal detection, so whether air-introduced machine shut down and need the operator to judge according to situation in the kiln, can not in time take operation measure, very unfavorable to timely elimination accident potential.
Summary of the invention
The technical problems to be solved in the utility model is to overcome the deficiency that prior art exists, and a kind of rotary kiln negative pressure safety interlocking control system that can in time eliminate fault behind the unexpected machine halt trouble of rotary kiln air-introduced machine is provided.
The utility model rotary kiln negative pressure safety interlocking control system is achieved by following technical proposals: the utility model rotary kiln negative pressure safety interlocking control system comprises forges preceding reinforced belt, rotary kiln, air-introduced machine, chimney, water dust scrubber, waste heat boiler, forge preceding disk feeder, host computer, Programmable Logic Controller plc, electric operator, the high-temperature flue gas discharging flow process that produces during described calcined by rotary kiln is one, flue gas enters waste heat boiler under the effect of air-introduced machine draft, the water-cooling wall of boiler, convection bank, water in the economizer etc. absorbs the heat that flue gas carries, produce steam, flue-gas temperature descends thereupon; Two, entering deduster purifies; Three, blowdown stack enters atmosphere; Technical solutions of the utility model are for being provided with the by-pass flue that communicates with rotary kiln flue collector and chimney between described rotary kiln and chimney, be provided with flue shutter at flue collector and by-pass flue interface, the place is equipped with the flue shutter YE at described flue shutter; On the rotary kiln charge pipe, be equipped with forge before reinforced electronic plate; Be provided with secondary wind frequency converter and tertiary air frequency converter at secondary wind and tertiary air power motor place; In described air-introduced machine porch, waste heat boiler burner hearth place is provided with pressure sensor; Described host computer is connected with pressure sensor by Programmable Logic Controller PLC, simultaneously by Programmable Logic Controller PLC and batcher, the belt that feeds in raw material, forge the preceding electronic plate that feeds in raw material, revolution kiln owner motor, wind, secondary wind frequency converter, a tertiary air frequency converter and be connected with the control circuit of flue shutter YE; In described waste heat boiler operating room, flue shutter and kiln operation chamber audible-visual annunciator is installed.
The utility model rotary kiln negative pressure safety interlocking control system has following beneficial effect compared with prior art: can realize electric operating by YE, the air-introduced machine safety interlocking control system of being made up of man-machine interface (host computer), Programmable Logic Controller PLC, various control appliance, electric operator.This system monitors operation, the open and-shut mode of air-introduced machine and flue shutter in process of production in real time, and the real-time status of blower fan and flue shutter is shown on man-machine interface.When air-introduced machine breaks down the shutdown phenomenon, host computer (industrial control computer) is to being placed in the air-introduced machine inlet, the detected force value of pressure sensor and the standard value at positions such as waste heat boiler burner hearth compare judgement, if find that measured value is less than standard value, Programmable Logic Controller sends instruction, make each release-locking device out of service, flue bypass flashboard is opened automatically, batcher stops feed, belt feeder is out of service, the blanking plate is closed automatically, one, two, tertiary air is stopped transport, and the open and-shut mode of prompting flue shutter, finally guarantee the rotary kiln safe operation; In order to ensure the execution of interlocking, the spy is provided with emergency stop push button simultaneously, when button is pressed, forces to turn-off the power supply of one, two, three wind, batcher, belt feeder, closes the blanking plate.Adopt above-mentioned two kinds of methods, can guarantee the safe operation of rotary kiln production system effectively.The manual station of YE is installed on Dayao operating room host computer simultaneously, can be realized the Long-distance Control of YE by manual station.Be provided with handwheel in YE one side,, can carry out flue shutter by the handwheel of YE and open and close manual execute-in-place taking place to have a power failure suddenly and stand-by power supply can not normal power supply the time.The running status of air-introduced machine of the present invention and by-pass flue flashboard detects in real time and shows, provides accurate information to the accurate judgement of production run state.Various operations after air-introduced machine is shut down have suddenly realized automatic chain control, have improved the promptness that fault is got rid of, and have reduced worker's labour intensity.Increased substantially the promptness of counter-measure when air-introduced machine is shut down suddenly after the enforcement, sound assurance the person and the device security of rotary kiln production process.The utility model is applicable to when the carbon rotary kiln air-introduced machine is shut down suddenly in the troubleshooting.
Description of drawings
The utility model rotary kiln negative pressure safety interlocking control system has following accompanying drawing:
Fig. 1 is the utility model rotary kiln negative pressure safety interlocking control system rotary kiln flow of flue gas process flow diagram;
Fig. 2 is the utility model rotary kiln negative pressure safety interlocking control system rotary kiln safety interlocking control principle figure;
Fig. 3 is that the utility model rotary kiln negative pressure safety interlocking control system constitutes schematic diagram;
Fig. 4 is the utility model rotary kiln negative pressure safety interlocking control system air-introduced machine audible-visual annunciator installation site schematic diagram;
Fig. 5 is for to be connected and installed schematic diagram for the utility model rotary kiln negative pressure safety interlocking control system YE;
Fig. 6 is the utility model rotary kiln negative pressure safety interlocking control system flue shutter electrical control figure.
Wherein: 1, forge preceding reinforced belt; 2, forge preceding reinforced electronic plate; 3, rotary kiln; 4, secondary wind frequency converter; 5, tertiary air frequency converter; 6, flue shutter YE; 7, by-pass flue; 8, air-introduced machine; 9, chimney; 10, water dust scrubber; 11, waste heat boiler; 12, forge preceding disk feeder; 13, rotary kiln flue collector; 14, flue shutter; 15, host computer; 16, Programmable Logic Controller; 17, pressure sensor; 18, revolution kiln owner motor; 19, waste heat boiler operating room; 20, kiln operation chamber; 21, audible-visual annunciator; 22, emergency stop push button; 23, fixed hinge; 24, lower position switch; 25, connecting rod; 26, upper limit position switch; 27, flue shutter fixed hinge; 28, handwheel; 29, SR; 30, the main induced draft fan sky is opened tripping operation monitoring intermediate relay ZJ 1; 31, flue shutter is opened intermediate relay ZJ 2; 32, by PLC controller manual unlocking flue shutter intermediate relay ZJ 3; 33, by PLC controller manual-lock flue shutter intermediate relay ZJ 4; 34, flue shutter YE opening signal input terminal PK1; 35, flue shutter YE shutdown signal input terminal PK2; 36, flue shutter YE manual unlocking PLC control signal output node PLC-1; 37, flue shutter YE manual-lock PLC control signal output node PLC-2; 38, the low flue shutter YE of kiln tail negative pressure is opened PLC control signal output node PLC-3 automatically; 39, main induced draft fan major loop A.C. contactor auxiliary contact JC; 40, air switch.
The specific embodiment
Below in conjunction with drawings and Examples the utility model rotary kiln negative pressure safety interlocking control system technical scheme is further described.
As Fig. 1, Fig. 2, shown in Figure 3, the utility model rotary kiln negative pressure safety interlocking control system comprise forge before reinforced belt 1, rotary kiln 3, air-introduced machine 8, chimney 9, water dust scrubber 10, waste heat boiler 11, forge before disk feeder 12, host computer 15, the high-temperature flue gas discharging flow process that produces during described calcined by rotary kiln is one, flue gas enters waste heat boiler under the effect of air-introduced machine draft, water in the water-cooling wall of boiler, convection bank, the economizer etc. absorbs the heat that flue gas carries, produce steam, flue-gas temperature descends thereupon; Two, entering deduster purifies; Three, blowdown stack enters atmosphere; Feature of the present utility model is to be provided with the by-pass flue 7 that communicates with rotary kiln flue collector 13 and chimney 9 between described rotary kiln 3 and chimney 9, be provided with flue shutter 14 at flue collector 13 and by-pass flue 7 interfaces, 14 places are equipped with flue shutter YE 6 at described flue shutter; On the rotary kiln charge pipe, be equipped with forge before reinforced electronic plate 2; Be provided with secondary wind frequency converter 4 and tertiary air frequency converter 5 respectively at secondary wind and tertiary air power motor place; Be provided with pressure sensor 17 in described air-introduced machine 8 porch and waste heat boiler 11 burner hearth places; Described host computer 15 is connected with pressure sensor 17 by Programmable Logic Controller PLC16, simultaneously by Programmable Logic Controller PLC16 and batcher 12, reinforced belt 1, forge before reinforced electronic plate 2, revolution kiln owner motor 18, wind, secondary wind frequency converter 4, a tertiary air frequency converter 5 be connected with the control circuit of flue shutter YE 6, as Fig. 3, shown in Figure 6; In described waste heat boiler operating room 19, flue shutter 14 and kiln operation chamber 20 audible-visual annunciator 21 is installed, as shown in Figure 4;
Negative pressure safety dumping flow process was when the high-temperature flue gas that described calcined by rotary kiln produces was shut down at air-introduced machine 8:
A, host computer 15 are placed in positions such as air-introduced machine 8 inlets, waste heat boiler 11 burner hearths by 16 pairs of Programmable Logic Controllers pressure sensor 17 detected force value and standard value compare judgement; Host computer 15 is monitored by the running status of 16 pairs of air-introduced machines 8 of Programmable Logic Controller; 15 pairs of scram button 22 states of host computer are monitored.
B, find monitor state and be set with the different time that host computer 15 sends instruction by Programmable Logic Controller 16;
C, according to the instruction of Programmable Logic Controller PLC16,6 actions of flue shutter YE, by-pass flue flashboard 14 is opened, flue gas enters blowdown stack 9 emptyings by by-pass flue 7; Batcher 12 stops feed, belt feeder 1 is out of service; The electronic plate 2 of feed is closed automatically before forging; One time wind, secondary wind frequency converter 4, tertiary air frequency converter 5 are stopped transport; Audible-visual annunciator 21 is reported to the police.
As shown in Figure 2, be provided with emergency stop push button 22 at described master-control room host computer 15 places.
As Fig. 1, shown in Figure 5, described flue shutter YE 6 is fixed on by-pass flue 7 belows, connecting rod 25 1 ends are connected with YE 6 by the fixed hinge 23 that is arranged on YE 6 one sides, the other end be connected by the by-pass flue flashboard 14 on the flue shutter fixed hinge 27 that is fixed on flue collector 13 1 sides; YE 6 connecting rods 25 motion tops are provided with upper limit position switch 26, are provided with lower position switch 24 below connecting rod 25 motions.Described YE 6 is provided with handwheel 28, can be when all power supplys all do not have electricity, manual unlocking, close flue shutter.
The utility model rotary kiln negative pressure safety interlocking control system is work like this: by-pass flue flashboard 14 is mounted in a big type controller between normal flue gas path of rotary kiln and the by pass flue path, under the normal condition, flue shutter 14 is in closed condition, the high-temperature flue gas that produces during rotary kiln 3 calcinings enters waste heat boiler 11 under the effect of air-introduced machine 8 drafts, the water-cooling wall of boiler, convection bank, water in the economizer etc. absorbs the heat that flue gas carries, produce steam, flue-gas temperature descends thereupon, enters to enter atmosphere by blowdown stack 9 after water dust scrubber 10 purifies.When steam generator system or air-introduced machine 8 broke down, by-pass flue flashboard 14 was opened, and flue gas directly enters blowdown stack 9 emptyings by by-pass flue 7.When main induced draft fan 8 breaks down shutdown, host computer 15 (industrial control computer) is to being placed in air-introduced machine 8 inlets, the pressure sensor 17 detected force value and the standard value at positions such as waste heat boiler 11 burner hearths compare judgement, if find that measured value is less than standard value, Programmable Logic Controller PLC16 sends instruction, flue bypass flashboard 14 is opened automatically, batcher 12 stops feed, belt feeder 1 is out of service, blanking plate 2 is closed automatically, a wind, secondary wind frequency converter 4, tertiary air frequency converter 5 is stopped transport, audible-visual annunciator 21 is reported to the police, as shown in Figure 3, finally guarantee the rotary kiln safe operation; In order to ensure the execution of interlocking, 15 spies of place are provided with emergency stop push button 22 at host computer, when button is pressed, can force to turn-off the power supply of one, two, three wind, batcher, belt feeder, close the blanking plate simultaneously.Adopt above-mentioned two kinds of methods, can guarantee the safe operation of rotary kiln production system effectively.
Claims (4)
1. rotary kiln negative pressure safety interlocking control system, comprise forge before reinforced belt (1), rotary kiln (3), air-introduced machine (8), chimney (9), water dust scrubber (10), waste heat boiler (11), forge preceding disk feeder (12), host computer (15), Programmable Logic Controller plc (16), YE (6) is characterized in that:
Between described rotary kiln (3) and chimney (9), be provided with the by-pass flue (7) that communicates with rotary kiln flue collector (13) and chimney (9), be provided with flue shutter (14) at flue collector (13) and by-pass flue (7) interface, locate to be equipped with flue shutter YE (6) at described flue shutter (14); On the rotary kiln charge pipe, be equipped with forge before reinforced electronic plate (2); Be provided with secondary wind frequency converter (4) and tertiary air frequency converter (5) respectively at secondary wind and tertiary air power motor place; Be provided with pressure sensor (17) respectively in described air-introduced machine (8) porch and waste heat boiler (11) burner hearth place; Described host computer (15) is connected with pressure sensor (17) by Programmable Logic Controller (16), simultaneously by Programmable Logic Controller PLC (16) with batcher (12), the belt (1) that feeds in raw material, forge the preceding electronic plate (2) that feeds in raw material, turn round kiln owner's motor (19), wind, secondary wind frequency converter (4), tertiary air frequency converter (5) and the control circuit of flue shutter YE (6) are connected; At described waste heat boiler operating room (20), flue shutter (14) and kiln operation chamber (20) audible-visual annunciator (21) is installed;
2. rotary kiln negative pressure safety interlocking control system according to claim 1, it is characterized in that: the place is provided with emergency stop push button (22) at described control circuit power supply.
3. rotary kiln negative pressure safety interlocking control system according to claim 1, it is characterized in that: described flue shutter YE (6) is fixed on by-pass flue (7) below, connecting rod (25) one ends are connected with YE (6) by the fixed hinge (23) that is arranged on YE (6) one sides, the other end be connected by the by-pass flue flashboard (14) on the fixed hinge (27) that is fixed on flue collector (13) one sides; YE (6) connecting rod (25) motion top is provided with upper limit position switch (26), is provided with lower position switch (24) in connecting rod (25) motion below.
4. according to claim 1 or 3 described rotary kiln negative pressure safety interlocking control systems, it is characterized in that: described YE (6) is provided with handwheel (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200369549U CN201014920Y (en) | 2006-12-28 | 2006-12-28 | Rotary kiln negative pressure safety interlocking control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200369549U CN201014920Y (en) | 2006-12-28 | 2006-12-28 | Rotary kiln negative pressure safety interlocking control system |
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| Publication Number | Publication Date |
|---|---|
| CN201014920Y true CN201014920Y (en) | 2008-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200369549U Expired - Lifetime CN201014920Y (en) | 2006-12-28 | 2006-12-28 | Rotary kiln negative pressure safety interlocking control system |
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| Country | Link |
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| CN (1) | CN201014920Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324408B (en) * | 2008-08-04 | 2010-06-02 | 中国铝业股份有限公司 | Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace |
| CN101957133B (en) * | 2009-07-16 | 2012-06-13 | 沈阳铝镁设计研究院有限公司 | System and method for ceaselessly supplying heat transfer oil for afterheat heat medium boiler of rotary kiln |
| CN111434998A (en) * | 2019-01-11 | 2020-07-21 | 宁波方太厨具有限公司 | Oil smoke buffer mechanism for range hood |
-
2006
- 2006-12-28 CN CNU2006200369549U patent/CN201014920Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324408B (en) * | 2008-08-04 | 2010-06-02 | 中国铝业股份有限公司 | Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace |
| CN101957133B (en) * | 2009-07-16 | 2012-06-13 | 沈阳铝镁设计研究院有限公司 | System and method for ceaselessly supplying heat transfer oil for afterheat heat medium boiler of rotary kiln |
| CN111434998A (en) * | 2019-01-11 | 2020-07-21 | 宁波方太厨具有限公司 | Oil smoke buffer mechanism for range hood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080130 |
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| EXPY | Termination of patent right or utility model |