CN103365229B - The intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling - Google Patents
The intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling Download PDFInfo
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Abstract
An intelligent control method for ultrasonic for scale prevention and removal equipment antiscaling, descaling, can make equipment be in optimal operational condition, reduces whole antiscaling, descaling system energy consumption, increases the service life, and improves security and stability.Step is as follows: by ultrasonic frequency generation device, the ultrasonic for scale prevention and removal equipment that electromechanical transformation apparatus is formed, by detecting unit, control module, the Control System of Microcomputer that monitoring unit is formed, the tube sheet place of electromechanical transformation apparatus at right angle setting heat transmission equipment at the scene, described detecting unit detects in real time to on-the-spot heat transmission equipment parameter, described control module is according to on-the-spot heat transmission equipment parameter, the output power of whole antiscaling, descaling system is carried out according to control program, described monitoring unit is to the output voltage U of ultrasonic for scale prevention and removal equipment, output current I, driving frequency f monitors, judge the running status of ultrasonic for scale prevention and removal equipment, display is normal to be run or fault/stopping, alerting signal is sent during fault.
Description
Technical field
The present invention relates to a kind of intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling, especially for the intelligent control method of the ultrasonic for scale prevention and removal equipment antiscaling, descaling acted on heat transmission equipment.
Background technology
Ultrasonic for scale prevention and removal technology is a kind of new Anti-fouling Technology, it has high-performance, high safety, passivation on line scale removal, environmental protection and feature with low cost, be widely used at industrial circle, and achieve good effect, but current ultrasound wave descaling equipment automaticity is low, antiscaling, descaling system cannot be made to be in optimal operational condition, to have impact on tartar preventing iron tartar effect, and add energy consumption.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling, makes equipment be in optimal operational condition, reduces whole antiscaling, descaling system energy consumption, increases the service life, and improves security and stability.
Technical solution of the present invention is:
An intelligent control method for ultrasonic for scale prevention and removal equipment antiscaling, descaling, its special character is:
1, system configuration
Whole system is made up of two parts: the ultrasonic for scale prevention and removal equipment that (1) is made up of ultrasonic frequency generation device, electromechanical transformation apparatus; (2) Control System of Microcomputer be made up of detecting unit, control module, monitoring unit, the tube sheet place of electromechanical transformation apparatus at right angle setting heat transmission equipment at the scene, the pulse signal transmission that described ultrasonic frequency generation device sends is to electromechanical transformation apparatus, electromechanical transformation apparatus converts electric energy to mechanical energy, acts on on-the-spot heat transmission equipment; Described detecting unit detects in real time to on-the-spot heat transmission equipment parameter, described control module is according to on-the-spot heat transmission equipment parameter, the output power of whole antiscaling, descaling system is carried out according to control program, described monitoring unit is monitored the output voltage U of ultrasonic for scale prevention and removal equipment, output current I, driving frequency f, judge the running status of ultrasonic for scale prevention and removal equipment, display is normal to be run or fault/stopping, sending alerting signal during fault;
2, on-the-spot heat transmission equipment parameter is detected in real time
Described detecting unit detects in real time to on-the-spot heat transmission equipment parameter, described on-the-spot heat transmission equipment parameter comprises the heat transmission equipment gateway temperature, heat transmission equipment working medium flow, the heat transmission equipment dirt layer thickness that are recorded by temperature sensor, flow transmitter, supersonic thickness meter, draws heat transfer temperature difference Δ T, working medium flow Q, dirty layer thickness H thus;
3, the data-signal that detecting unit records is sent to control module, judge that current live heat transmission equipment duty increases to determine ultrasonic frequency generation device power or reduces, step is as follows:
(1) setting dirty layer thickness is G, the best tartar preventing iron tartar effect value that this G value and antiscaling descaling equipment can reach,
H '=H+(Δ T '-Δ T) * Δ Tk+(Q '-Q) * Qk, H ' they are heat transmission equipment dirt layer thickness modified value; The heat transfer temperature difference that Δ T ', Q ' are heat transmission equipment, working medium flow setting value, determine according to different heat transmission equipments; Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, and reflection heat transfer temperature difference and flow are subject to the influence degree of dirty layer thickness variation, and value is 1-3%; Using the homophony signal of equipment dirt layer thickness signal as control module, the temperature difference, flow signal are all multiplied by corresponding scale-up factor, in equilibrium conditions, and H '=G; Under non-equilibrium condition, H ' ≠ G;
(2) as (H '-G)/G > 2%, the output signal of control module increases, and ultrasonic drive frequency increases, and output power increases, and tartar preventing iron tartar effect strengthens;
As (H '-G)/G <-2%, the output signal of control module reduces, and ultrasonic drive frequency reduces, and output power reduces, and tartar preventing iron tartar effect weakens;
When-2%≤(H '-G)/G≤2% time, the adjustment of control module control program stops, and ultrasonic drive frequency is currency, and output power is constant;
(3) increase of ultrasonic drive frequency or decreasing value are with the ratio adjustment of 1% of (H '-G)/G, system calculates once for every 24 hours (H '-G)/G value, and adjust a driving frequency with this, after drive frequency variations, higher limit is no more than 120% of driving frequency setting value, lower limit is not less than 80% of driving frequency setting value, when reaching higher limit or lower limit, with the upper limit or the work of lower limit driving frequency value;
4, judge and show the running status of ultrasonic for scale prevention and removal equipment
Monitoring unit is monitored the output voltage U of ultrasonic for scale prevention and removal equipment, output current I, driving frequency f, compare with output voltage setting value U1, the output current setting value I1 of ultrasonic for scale prevention and removal equipment, driving frequency setting value f1, when the output voltage U recorded, output current I exceed setting value ± 20%, monitoring unit sends signal out of service and reports to the police, when recording driving frequency f and exceeding setting value ± 20%, send alerting signal; The display of other scopes is normal to be run.
The size of described ultrasonic for scale prevention and removal device parameter voltage setting value U1, current setting value I1, frequency setting value f1 sets according to different ultrasonic for scale prevention and removal equipment.
Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, and reflection heat transfer temperature difference and flow, by the influence degree of dirty layer thickness variation, get definite value 2%, 1%.
Advantage of the present invention is:
1, the driving frequency control of ultrasonic frequency generation device is carried out according to Control System of Microcomputer, and the operation of whole antiscaling, descaling system is detected, reports to the police, controlled, the rational design of whole antiscaling, descaling system can be realized, equipment is made to be in optimal operational condition, make whole antiscaling, descaling system energy consumption minimum, serviceable life is the longest, and security and stability is the highest.
2, when heat transmission equipment dirt layer thickens, heat transfer temperature difference reduces, and working medium flow reduces.According to H '=H+(Δ T '-Δ T) * Δ Tk+(Q '-Q) * Qk, H ' be consider heat transfer temperature difference and working medium flow impact dirty layer thickness modified value.Thus obtained H ' > H, (H '-G)/G > (H-G)/G, therefore the adjustment amount of control program is exaggerated to a certain extent, and dirty layer is thicker, (Δ T '-Δ T) and (Q '-Q) difference is larger, H ' is larger with the difference of H, and the adjustment amount of control program is larger, and system reaches steady state (SS) sooner.When heat transmission equipment dirt layer thickness reduces, heat transfer temperature difference increases, and working medium flow increases, and dirty layer is thinner, and (Δ T '-Δ T) and (Q '-Q) difference is less, and H ' gets over close to H value.Consider the dirty layer thickness modified value H ' that dirty layer thickness, heat transfer temperature difference and flow obtain, add the reference point judging heat transmission equipment dirt layer thickness variation value, decrease the error because single detecting unit fault causes, system is more stable simultaneously;
3, heat transfer temperature difference signal and flow signal are all multiplied by one much smaller than the scale-up factor of 1, ensure that whole control program is using equipment dirt layer thickness signal as the homophony signal of control module, ensure that the correctness of whole control procedure.
Accompanying drawing explanation
Fig. 1 is antiscaling, descaling adjustment process block scheme of the present invention;
Fig. 2 is Control System of Microcomputer network structure of the present invention;
Fig. 3 is monitoring unit control flow chart of the present invention;
Fig. 4 is electromechanical transformation apparatus in-site installation schematic diagram of the present invention.
Embodiment
1, system configuration
As shown in Figure 1, Figure 2 and Figure 4, whole system is made up of two parts: the ultrasonic for scale prevention and removal equipment that (1) is made up of ultrasonic frequency generation device 1, electromechanical transformation apparatus 2; (2) Control System of Microcomputer be made up of detecting unit 5, control module 4, monitoring unit 6, be connected with PC computing machine, man-machine interface, the tube sheet place of electromechanical transformation apparatus 2 at right angle setting heat transmission equipment 3 at the scene, vibration passes to tube bank by tube sheet, utilize hyperacoustic shearing effect, microvovtex effect, agglomeration effect, realize antiscaling, descaling function.According to hyperacoustic propagation characteristic, when electromechanical transformation apparatus 2 and on-the-spot heat transmission equipment 3 tube sheet at right angle setting, ultrasound wave is minimum along tube bank direction propagation attenuation, and farthest, shearing effect, microvovtex effect, agglomeration effect are the most obvious, and antiscaling, descaling is most effective for propagation distance.Electromechanical transformation apparatus 2 is arranged on on-the-spot heat transmission equipment 3 outer wall, does not destroy equipment operating condition, can realize online installation.
The pulse signal that described ultrasonic frequency generation device 1 sends is through cable transmission to electromechanical transformation apparatus 2, and electromechanical transformation apparatus 2 converts electric energy to mechanical energy, acts on on-the-spot heat transmission equipment 3; Described detecting unit 5 detects in real time to on-the-spot heat transmission equipment parameter, described control module 4 is according to on-the-spot heat transmission equipment parameter, the output power of whole antiscaling, descaling system is carried out according to control program, output voltage U, output current I, the driving frequency f of described monitoring unit 6 pairs of ultrasonic for scale prevention and removal equipment monitor, judge the running status of ultrasonic for scale prevention and removal equipment, display is normal to be run or fault/stopping, sending alerting signal during fault;
2, on-the-spot heat transmission equipment parameter is detected in real time
Described detecting unit 5 detects in real time to on-the-spot heat transmission equipment parameter, described on-the-spot heat transmission equipment parameter comprises the heat transmission equipment gateway temperature, heat transmission equipment working medium flow, the heat transmission equipment dirt layer thickness that are recorded by temperature sensor, flow transmitter, supersonic thickness meter, draws heat transfer temperature difference Δ T, working medium flow Q, dirty layer thickness H thus;
3, the data-signal that detecting unit 5 records is sent to control module 4, judges that current live heat transmission equipment 3 duty increases to determine ultrasonic frequency generation device 1 power or reduces.
(1) setting dirty layer thickness is G, the best tartar preventing iron tartar effect value that this G value and antiscaling descaling equipment can reach,
H '=H+(Δ T '-Δ T) * Δ Tk+(Q '-Q) * Qk, H ' they are heat transmission equipment dirt layer thickness modified value; The heat transfer temperature difference that Δ T ', Q ' are heat transmission equipment, working medium flow setting value, determine according to different heat transmission equipments; Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, and reflection heat transfer temperature difference and flow are subject to the influence degree of dirty layer thickness variation, and value is 1-3%, and the present embodiment gets 1%; Using the homophony signal of equipment dirt layer thickness signal as control module, the temperature difference, flow signal are all multiplied by corresponding scale-up factor, in equilibrium conditions, and H '=G; Under non-equilibrium condition, H ' ≠ G.If there is one or more signal to change, equilibrium state is destroyed, and the output of control module 4 changes.
(2) as (H '-G)/G > 2%, the output signal of control module 4 increases, and ultrasonic drive frequency increases, and output power increases, and tartar preventing iron tartar effect strengthens;
As (H '-G)/G <-2%, the output signal of control module 4 reduces, and ultrasonic drive frequency reduces, and output power reduces, and tartar preventing iron tartar effect weakens;
In the steady state, namely when-2%≤(H '-G)/G≤2% time, the adjustment of control module 4 control program stops, and the output of control module 4 is corresponding with load, and ultrasonic drive frequency is currency, and output power is constant;
(3) increase of ultrasonic drive frequency or decreasing value are with the ratio adjustment of 1% of (H '-G)/G, system calculates once for every 24 hours (H '-G)/G value, and adjust a driving frequency with this, after drive frequency variations, higher limit is no more than 120% of driving frequency setting value, lower limit is not less than 80% of driving frequency setting value, when reaching higher limit or lower limit, with the upper limit or the work of lower limit driving frequency value.
4, judge and show the running status of ultrasonic for scale prevention and removal equipment
As shown in Figure 3, output voltage U, output current I, the driving frequency f of monitoring unit 6 pairs of ultrasonic for scale prevention and removal equipment monitor, compare with output voltage setting value U1, the output current setting value I1 of ultrasonic for scale prevention and removal equipment, driving frequency setting value f1, when the output voltage U recorded, output current I exceed setting value ± 20%, monitoring unit 6 sends signal out of service and reports to the police, when recording driving frequency f and exceeding setting value ± 20%, send alerting signal; The display of other scopes is normal to be run.The size of described ultrasonic for scale prevention and removal device parameter voltage setting value U1, current setting value I1, frequency setting value f1 sets according to different ultrasonic for scale prevention and removal equipment.
Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, and reflection heat transfer temperature difference and flow, by the influence degree of dirty layer thickness variation, get definite value 1%.
Embodiment 2
Described Δ Tk, Qk value is 2%, the other the same as in Example 1.
Claims (3)
1. an intelligent control method for ultrasonic for scale prevention and removal equipment antiscaling, descaling, is characterized in that:
(1), system configuration
Whole system is made up of two parts: the ultrasonic for scale prevention and removal equipment that (1) is made up of ultrasonic frequency generation device, electromechanical transformation apparatus; (2) Control System of Microcomputer be made up of detecting unit, control module, monitoring unit, the tube sheet place of electromechanical transformation apparatus at right angle setting heat transmission equipment at the scene, the pulse signal transmission that described ultrasonic frequency generation device sends is to electromechanical transformation apparatus, electromechanical transformation apparatus converts electric energy to mechanical energy, acts on on-the-spot heat transmission equipment; Described detecting unit detects in real time to on-the-spot heat transmission equipment parameter, described control module is according to on-the-spot heat transmission equipment parameter, the output power of whole antiscaling, descaling system is carried out according to control program, described monitoring unit is monitored the output voltage U of ultrasonic for scale prevention and removal equipment, output current I, driving frequency f, judge the running status of ultrasonic for scale prevention and removal equipment, display is normal to be run or fault/stopping, sending alerting signal during fault;
(2), on-the-spot heat transmission equipment parameter is detected in real time
Described detecting unit detects in real time to on-the-spot heat transmission equipment parameter, described on-the-spot heat transmission equipment parameter comprises the heat transmission equipment gateway temperature, heat transmission equipment working medium flow, the heat transmission equipment dirt layer thickness that are recorded by temperature sensor, flow transmitter, supersonic thickness meter, draws heat transfer temperature difference Δ T, working medium flow Q, dirty layer thickness H thus;
(3) data-signal, by detecting unit recorded is sent to control module, and judge that current live heat transmission equipment duty increases to determine ultrasonic frequency generation device power or reduces, step is as follows:
A () sets dirty layer thickness is G, the best tartar preventing iron tartar effect value that this G value and antiscaling descaling equipment can reach,
H '=H+(Δ T '-Δ T) * Δ Tk+(Q '-Q) * Qk, H ' they are heat transmission equipment dirt layer thickness modified value; The heat transfer temperature difference that Δ T ', Q ' are heat transmission equipment, working medium flow setting value, determine according to different heat transmission equipments; Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, and reflection heat transfer temperature difference and flow are subject to the influence degree of dirty layer thickness variation, and value is 1-3%; Using the homophony signal of equipment dirt layer thickness signal as control module, the temperature difference, flow signal are all multiplied by corresponding scale-up factor, in equilibrium conditions, and H '=G; Under non-equilibrium condition, H ' ≠ G;
B (), as (H '-G)/G > 2%, the output signal of control module increases, and ultrasonic drive frequency increases, and output power increases, and tartar preventing iron tartar effect strengthens;
As (H '-G)/G <-2%, the output signal of control module reduces, and ultrasonic drive frequency reduces, and output power reduces, and tartar preventing iron tartar effect weakens;
When-2%≤(H '-G)/G≤2% time, the adjustment of control module control program stops, and ultrasonic drive frequency is currency, and output power is constant;
C the increase of () ultrasonic drive frequency or decreasing value are with the ratio adjustment of 1% of (H '-G)/G, system calculates once for every 24 hours (H '-G)/G value, and adjust a driving frequency with this, after drive frequency variations, higher limit is no more than 120% of driving frequency setting value, lower limit is not less than 80% of driving frequency setting value, when reaching higher limit or lower limit, with the upper limit or the work of lower limit driving frequency value;
(4), judge and show the running status of ultrasonic for scale prevention and removal equipment
Monitoring unit is monitored the output voltage U of ultrasonic for scale prevention and removal equipment, output current I, driving frequency f, compare with output voltage setting value U1, the output current setting value I1 of ultrasonic for scale prevention and removal equipment, driving frequency setting value f1, when the output voltage U recorded, output current I exceed setting value ± 20%, monitoring unit sends signal out of service and reports to the police, when recording driving frequency f and exceeding setting value ± 20%, send alerting signal; The display of other scopes is normal to be run.
2. the intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling according to claim 1, is characterized in that: the size of described ultrasonic for scale prevention and removal device parameter voltage setting value U1, current setting value I1, frequency setting value f1 sets according to different ultrasonic for scale prevention and removal equipment.
3. the intelligent control method of ultrasonic for scale prevention and removal equipment antiscaling, descaling according to claim 1, it is characterized in that: Δ Tk, Qk are heat transfer temperature difference coefficient, coefficient of flow, reflection heat transfer temperature difference and flow, by the influence degree of dirty layer thickness variation, get definite value 2%, 1%.
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