CN201819576U - Computer real-time control system for residual heat utilization and smoke gas circulation of sintering annular cooler - Google Patents
Computer real-time control system for residual heat utilization and smoke gas circulation of sintering annular cooler Download PDFInfo
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- CN201819576U CN201819576U CN2010202361868U CN201020236186U CN201819576U CN 201819576 U CN201819576 U CN 201819576U CN 2010202361868 U CN2010202361868 U CN 2010202361868U CN 201020236186 U CN201020236186 U CN 201020236186U CN 201819576 U CN201819576 U CN 201819576U
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- control system
- residual heat
- cooler
- section
- flue gas
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Abstract
The utility model discloses a computer real-time control system for residual heat utilization and smoke gas circulation of a sintering annular cooler. The system mainly comprises a temperature sensor TE21 and a pressure transmitter PT21 arranged at the outlet of a wind chamber at the section I of the annular cooler, a circular fan rotating-speed executer, a wind supplementing door executer and a computer analog quantity control system, wherein the temperature sensor TE21 is connected with the circular fan rotating-speed executer through signals by the computer analog quantity control system; and the pressure transmitter PT21 is connected with the wind supplementing door executer through signals by the computer analog quantity control system. With the computer real-time control system for residual heat utilization and smoke gas circulation of the sintering annular cooler and the control method thereof, the circular fan can be adjusted effectively according to the change of the smoke temperature in the wind chamber, the stable running of the smoke gas circulation can be ensured, and the utilization ratio of residual heat can be improved; and the pressure in the wind chamber can be controlled within a reasonable range so as to reduce the influence of the mutual wind leakage between the wind chamber and the atmosphere on the utilization ratio of the residual heat.
Description
Technical field
The utility model relates to a kind of industrial computer real-time control system, especially a kind of sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system.
Background technology
In steel manufacture process, sintering machine is the preceding working procedure of supply mineral aggregate to blast furnace ironmaking, wherein sintering circular-cooler is the later process in the sintering machine process, be used to cool off within the temperature to 150 ℃ of sintering feed, have 5 sections cooling air compartments, with air blast form cooling sintering feed, wherein I section, II section reach 300 ℃～400 ℃ by the cigarette temperature of air blast discharge, have at least 60% heat in waste heat boiler, to produce steam in its flue gas, be used for heat supply or generating.
In the UTILIZATION OF VESIDUAL HEAT IN process, the outlet of central cooler I section, II section air compartment is communicated with the mouth that advances of waste heat boiler by the cigarette air channel, the outlet flue of waste heat boiler is communicated with simultaneously by the import of circulation airduct with central cooler I section, II section air compartment, on this circulation airduct, be provided with circulating fan, circulating fan for flue gas in central cooler I section, II section air compartment and the circulation between waste heat boiler power is provided.Existing circulating fan is manually controlled by the operator usually, can not control timely and effectively along with the variation of cigarette temperature, causes utilization rate of waste heat not high.
In the UTILIZATION OF VESIDUAL HEAT IN process, central cooler I section, II section air compartment exist the situation of leaking out simultaneously, and when the air compartment internal pressure was higher than external atmosphere pressure, the high-temperature flue gas in the air compartment just can drain in the ambient atmosphere, causes the loss of heat; When the air compartment internal pressure is lower than external atmosphere pressure, Cryogenic air in the ambient atmosphere just can drain in the air compartment, reduce the temperature of flue gas in the air compartment, thereby influence UTILIZATION OF VESIDUAL HEAT IN, so central cooler I section, pressure in the II section air compartment is very crucial, be typically provided with special wind-supplying mouth in the prior art, manually control by the operator, air is delivered in the air compartment from mending air door, because it is undesirable to mend air door control effect, its aperture can not change and timely the adjusting along with the air compartment internal pressure, thereby makes central cooler I section, pressure transient in the II section air compartment, serious heat loss, the efficient of reduction UTILIZATION OF VESIDUAL HEAT IN.
The utility model content
The purpose of this utility model is that a kind of circulating fan that provides in order to solve above-mentioned technical deficiency can effectively be regulated in indoor with the wind cigarette temperature variation, benefit throttle opening room pressure variation is with the wind effectively regulated, guarantee flue gas recirculation stable operation, improve the sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system of utilization rate of waste heat.
In order to achieve the above object, the sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system that the utility model is designed, it mainly comprises temperature sensor TE21 and the pressure transmitter PT21 that is positioned at central cooler I section air compartment exit, circulating fan rotating speed actuator, mend air door actuator and computer simulation amount control system, it is characterized in that described temperature sensor TE21 as calculated the machine analog control system be connected with circulating fan rotating speed actuator signal, described pressure transmitter PT21 as calculated the machine analog control system with mend the air door actuator signal and be connected.
The control method of above-mentioned sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system, its adopts computer to control in real time, it is characterized in that: with central cooler I section air compartment exit temperature signal T
21Be control signal, regulate the circulating fan rotating speed; With central cooler I section air compartment outlet pressure signal P
21Be control signal, regulate and mend throttle opening.
In order to obtain good cigarette temperature regulating effect, can be temperature signal T
21Gather the back and compare with set-point A, relatively circulating fan rotating speed actuator is exported and controlled to the value after after computing.
In order further to improve utilization rate of waste heat, preferred scheme is:
Described set-point A is a variable, and its expression formula is
A
1Setting value, span is 350～450;
C
1Coefficient, span are 0.1～1;
Q
y＝V
21×Cpt
21×T
21+V
22×Cpt
22×T
22；
V wherein
21, V
22Be respectively central cooler I section, II section air compartment outlet cigarette amount;
T
21, T
22Be central cooler I section, II section air compartment outlet temperature;
Cpt
21, Cpt
22Be T
21, T
22The average specific heat at constant pressure of the flue gas of correspondence during temperature;
Q
Y1, Q
Y2The Q of gained behind the double sampling before and after being meant
yValue.
In order to obtain good control effect, can be temperature signal T
21After the PID computing, export control circulating fan rotating speed actuator with the value of set-point A after relatively.
In order to obtain good air compartment internal pressure regulating effect, can be pressure signal P
21Gather the back and compare with set-point B, relatively the value after is exported control and is mended the air door actuator after computing.
In order further to improve utilization rate of waste heat, preferred scheme is:
Described set-point B is a variable, and its expression formula is
B
1Span is-100～100;
C
2Span is 0.1～1;
Q
y＝V
21×Cpt
21×T
21+V
22×Cpt
22×T
22；
V wherein
21, V
22Be respectively central cooler I section, II section air compartment outlet cigarette amount;
T
21, T
22Be central cooler I section, II section air compartment outlet temperature;
Cpt
21, Cpt
22Be T
21, T
22The average specific heat at constant pressure of the flue gas of correspondence during temperature;
Q
Y1, Q
Y2The Q of gained behind the double sampling before and after being meant
YValue.
As preferably, pressure signal P
21After the PID computing, export control with the value of set-point B after relatively and mend the air door actuator.
The sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system that the utility model obtains, circulating fan can effectively be regulated in indoor with the wind cigarette temperature variation, guarantees flue gas recirculation stable operation, improves utilization rate of waste heat; Benefit throttle opening room pressure variation is with the wind effectively regulated, thereby the air compartment internal pressure is controlled in the reasonable range, reduces because of the influence of leaking out mutually utilization rate of waste heat being brought between air compartment and the atmosphere; Especially set-point A, B adopt above-mentioned formula, can reach the maximization of central cooler outlet flue gas heat.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the utility model cigarette temperature control method schematic diagram;
Fig. 3 is the utility model cigarette pressure-controlled method schematic diagram;
Fig. 4 is that the utility model flue gas heat is calculated the control principle block diagram.
Among the figure: central cooler I section air compartment 1; Central cooler II section air compartment 2; Circulating fan 3; Mend air door 4; Temperature sensor TE21, TE22; Pressure transmitter PT11, PT12, PT21, PT22; Boiler 5; Ring air-cooler 6.
The specific embodiment
The utility model will be further described in conjunction with the accompanying drawings below by embodiment.
As shown in Figure 1, the described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system, it mainly comprises temperature sensor TE21 and pressure transmitter PT21, circulating fan rotating speed actuator, benefit air door actuator and the computer simulation amount control system that is positioned at central cooler I section air compartment 1 exit, it is characterized in that described temperature sensor TE21 as calculated the machine analog control system be connected with circulating fan rotating speed actuator signal, described pressure transmitter PT21 as calculated the machine analog control system with mend the air door actuator signal and be connected.
Its control method adopts computer to control in real time, with central cooler I section air compartment 1 exit temperature signal T
21Be control signal, regulate the circulating fan rotating speed; With central cooler I section air compartment 1 outlet pressure signal P
21Be control signal, regulate and mend throttle opening.
The described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system, circulating fan can effectively be regulated in indoor with the wind cigarette temperature variation, guarantees flue gas recirculation stable operation, improves utilization rate of waste heat; Benefit throttle opening room pressure variation is with the wind effectively regulated, thereby the air compartment internal pressure is controlled in the reasonable range, reduces because of the influence of leaking out mutually utilization rate of waste heat being brought between air compartment and the atmosphere.
The described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system, it mainly comprises temperature sensor TE21 and pressure transmitter PT21, circulating fan rotating speed actuator, benefit air door actuator and the computer simulation amount control system that is positioned at central cooler I section air compartment 1 exit, it is characterized in that described temperature sensor TE21 as calculated the machine analog control system be connected with circulating fan rotating speed actuator signal, described pressure transmitter PT21 as calculated the machine analog control system with mend the air door actuator signal and be connected.
Its control method adopts computer to control in real time, with central cooler I section air compartment 1 exit temperature signal T
21Be control signal, regulate the circulating fan rotating speed; With central cooler I section air compartment 1 outlet pressure signal P
21Be control signal, regulate and mend throttle opening, wherein temperature signal T
21Gather the back and compare with set-point A, relatively circulating fan rotating speed actuator is exported and controlled to the value after after computing.After I section outlet cigarette temperature changes, its temperature sensor TE21 signal exports the rotating speed actuator to after sending into computer simulation amount control system and set-point A comparison operation, make the circulating fan rotation speed change, cause the variation of I section, II section air compartment base pressure, blast increases can make the cigarette temperature descend, and blast reduces can the cigarette temperature be increased.Keep the cigarette temperature within zone of reasonableness, wherein A is a fixed value, and span is 350～450, as 380,420;
Pressure signal P
21Gather the back and compare with set-point B, relatively the value after is exported control and is mended the air door actuator after computing.Wherein B is a fixed value, and span is-100～0, as 0 ,-50 ,-100.
Since sintering feed amount, the warm variation of material, the circulating fan change in rotational speed, and I section, II section outlet cigarette are pressed and can be fluctuateed, according to this cigarette pressure of principle P
21, P
22, should be slightly less than 0; Its high-temperature flue gas can leak to atmosphere by the top greater than 0 the time when cigarette is pressed, when its cigarette is pressed less than 0 the time the outdoor cold wind top smoke-box that can bleed, cause the cigarette temperature to descend, so control outlet cigarette is pressed in-and comparatively suitable about 100Pa, regulated the benefit throttle opening by adjuster, it is approaching that inleakage and cold wind are mended into amount, is to keep system stability mode in the best state.
Embodiment 3
The control method of the described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system, described as different from Example 2 set-point A is a variable, its expression formula is
A
1Setting value, span is 350～450;
C
1Coefficient, span are 0.1～1;
Q
y＝V
21×Cpt
21×T
21+V
22×Cpt
22×T
22； GJ/h；
V wherein
21, V
22Be respectively central cooler I section, II section air compartment outlet cigarette amount; Nm
3/ h;
T
21, T
22Be central cooler I section, II section air compartment outlet temperature; ℃;
Cpt
21, Cpt
22Be T
21, T
22The average specific heat at constant pressure of the flue gas of correspondence during temperature; KJ/Nm
3℃.
Q
Y1, Q
Y2The Q of gained behind the double sampling before and after being meant
yValue.Sampling time can be 2 minutes～3 minutes.
A
1, C
1Value can in described scope, debug according to actual conditions.
Obtain different temperature given value A with the thermal change of outlet flue gas as can be seen according to above-mentioned formula, the control method of the described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system can further improve the flue gas heat utilization rate than embodiment 2.
The control method of the described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system, described as different from Example 3 set-point B is a variable, its expression formula is
B
1Span is-100～100;
C
2Span is 0.1～1;
Q
y＝V
21×Cpt
21×T
21+V
22×Cpt
22×T
22； GJ/h；
V wherein
21, V
22Be respectively central cooler I section, II section air compartment outlet cigarette amount; Nm
3/ h;
T
21, T
22Be central cooler I section, II section air compartment outlet temperature; ℃;
Cpt
21, Cpt
22Be T
21, T
22The average specific heat at constant pressure of the flue gas of correspondence during temperature; KJ/Nm
3℃.
Q
Y1, Q
Y2The Q of gained behind the double sampling before and after being meant
YValue.
Sampling time can be 2 minutes～3 minutes.
B
1, C
2The value of getting can be debugged in described scope according to actual conditions.
Obtain different temperature given value A with the thermal change of outlet flue gas as can be seen according to the computing formula of A, obtain different flue gas pressures set-point B with the thermal change of outlet flue gas as can be seen according to the computing formula of B.The control method of the described sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN of present embodiment flue gas recirculation real time computer control system can realize the maximization of central cooler outlet flue gas heat.
Claims (1)
1. sintering circular-cooler UTILIZATION OF VESIDUAL HEAT IN flue gas recirculation real time computer control system, it mainly comprises temperature sensor TE21 and pressure transmitter PT21, circulating fan rotating speed actuator, benefit air-valve actuator and the computer simulation amount control system that is positioned at central cooler I section air compartment exit, it is characterized in that described temperature sensor TE21 as calculated the machine analog control system be connected with circulating fan rotating speed actuator signal, described pressure transmitter PT21 as calculated the machine analog control system with mend the air door actuator signal and be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202361868U CN201819576U (en) | 2010-06-24 | 2010-06-24 | Computer real-time control system for residual heat utilization and smoke gas circulation of sintering annular cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202361868U CN201819576U (en) | 2010-06-24 | 2010-06-24 | Computer real-time control system for residual heat utilization and smoke gas circulation of sintering annular cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201819576U true CN201819576U (en) | 2011-05-04 |
Family
ID=43917526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202361868U Expired - Fee Related CN201819576U (en) | 2010-06-24 | 2010-06-24 | Computer real-time control system for residual heat utilization and smoke gas circulation of sintering annular cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201819576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881562A (en) * | 2010-06-24 | 2010-11-10 | 浙江西子联合工程有限公司 | Real time control system for waste heat in sinter-circle-cooling machine by using fume circle computer and control method thereof |
-
2010
- 2010-06-24 CN CN2010202361868U patent/CN201819576U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881562A (en) * | 2010-06-24 | 2010-11-10 | 浙江西子联合工程有限公司 | Real time control system for waste heat in sinter-circle-cooling machine by using fume circle computer and control method thereof |
| CN101881562B (en) * | 2010-06-24 | 2012-06-13 | 浙江西子联合工程有限公司 | Real time control system for waste heat in sinter-circle-cooling machine by using fume circle computer and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20150624 |
|
| EXPY | Termination of patent right or utility model |