CN201618612U - Control circuit for high-voltage electrostatic oily fume removers - Google Patents
Control circuit for high-voltage electrostatic oily fume removers Download PDFInfo
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- CN201618612U CN201618612U CN2010201403416U CN201020140341U CN201618612U CN 201618612 U CN201618612 U CN 201618612U CN 2010201403416 U CN2010201403416 U CN 2010201403416U CN 201020140341 U CN201020140341 U CN 201020140341U CN 201618612 U CN201618612 U CN 201618612U
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
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Abstract
The utility model relates to a control circuit for high-voltage electrostatic oily fume removers, which comprises an electric field current setting circuit, a PI closed-loop circuit, a trigger circuit, a high voltage output unit, a current sampling and high voltage isolation circuit and an overcurrent protection and signal identification circuit; when in normal operation, the voltage of a high-voltage electric field is between a critical voltage and a breakdown voltage, and if the fluctuation of the power or the load exists, the control circuit can control the output voltage of the high voltage output unit to stabilize between the critical voltage and the breakdown voltage. If local disruptive discharge occurs in the electric field and the frequency of local disruptive discharge exceeds a set number per unit time, permanent short-circuiting is determined, and the high voltage output unit is controlled to stop output. Otherwise, flickered discharge is determined, the high voltage output unit is controlled to continue to output high-voltage power, and thereby the normal operation of a power supply system is guaranteed.
Description
Technical field
The utility model relates to the control circuit of a kind of high-voltage static flue gas removing device, particularly high-voltage static flue gas removing device.
Background technology
Heat setting machine is one of capital equipment in the textile dyeing and finishing industry, is to utilize hot-air that fabric is carried out device dry and that put in order and make it to finalize the design.Contain various pigment auxiliary agents in the flue gas that heat setting machine is discharged,, therefore oil smoke must be removed, could satisfy emission request so there are a large amount of oily compositions.
The operation principle of existing flue gas removing device is: make waste gas pass through a high voltage electric field, to make flue gas generation corona discharge (be critical voltage V when the voltage of this high voltage electric field is in
L) (be breakdown voltage V to taking place that petard punctures
J) between the time, electric field makes flue gas ionization, and with oily composition accumulation on anode, and reclaim, thereby waste gas is purified and reaches emission request by waste oil collecting device.
Similar flue gas removing device, as: disclosed oil removal machine and the control method thereof of Chinese patent publication number CN101234365 with static degreasing unit, this oil removal machine comprises: the oil removal machine body, oil removing passage and static degreasing unit, this oil removing passage is located on this oil removal machine body, this oil removing passage comprises oily machine air intake vent inside, outside and the oily machine air outlet of oil machine air intake vent, this oil machine air intake vent inside, outside and this oil machine air outlet is communicated with each other, this static degreasing unit comprises high-pressure electrostatic module and Electrostatic Absorption module, this static degreasing unit is connected with high voltage source, and this static degreasing unit is arranged at this oil removing passage; The static degreasing unit with oil smoke or dirty air filtration after, discharge gas by oily machine air outlet.Chinese patent 03261057.2 discloses the electric control gear of high-voltage static electricity fume clarifier; in its governor circuit, be provided with and connect high-tension transformer output high pressure after adjustable startup time-delay, oscillating circuit and Switching Power Supply connect in turn again, and be provided with feedback protection, reset, counting, the adjustable delay circuit that resets.
Above-mentioned the deficiencies in the prior art part has: (1) is owing to the voltage of the high voltage electric field that forms effective oil removing cigarette is between described critical voltage and the breakdown voltage, any fluctuation from power supply or load, all will cause the high-voltage breakdown or the ionization of oil smoke to be lost efficacy, therefore how guaranteeing the stable of high-pressure work point, is the problem that this area will solve.(2) because a large amount of impurity in the flue gas are attached to electric field two super fine a variety of causes; the phenomenon of partial breakdown discharge easily takes place in the electric field; form the power-supply system of electric field and should carry out reliable protection this moment; power-supply system also will possess the function of permanent short circuit of identification and glitter discharge (being instantaneous short-circuit) simultaneously; to guarantee that power-supply system can also operate as normal when instantaneous short-circuit takes place.
The utility model content
The technical problems to be solved in the utility model provides the control circuit of the higher high-voltage static flue gas removing device of long, security in a kind of service life and reliability.
For solving the problems of the technologies described above, the utility model provides a kind of control circuit of high-voltage static flue gas removing device, comprising:
The electric field current setting circuit is used for the electric field electric current of the oil smoke passage of high-voltage static flue gas removing device is located at preset value, so that the voltage of electric field in the described oil smoke passage is stabilized on the value between critical voltage and the breakdown voltage;
The PI closed loop circuit, the set-point input of this PI closed loop circuit links to each other with the output of described electric field current setting circuit;
Circuits for triggering link to each other with the control signal output of PI closed loop circuit;
The high pressure output unit, the high pressure output of this high pressure output unit is used for generating high voltage electric field at described oil smoke passage; The triggering signal output of described circuits for triggering links to each other with the voltage controling input end of high pressure output unit; Described PI closed loop circuit is by the output voltage of circuits for triggering control high pressure output unit;
Current sample and high pressure buffer circuit, link to each other with the sampling current output of high pressure output unit, be used to obtain and the corresponding sample rate current of the output voltage of high pressure output unit, and the sample rate current value is fed back to the feedback signal input of PI closed loop circuit, judge the voltage height that the high pressure output unit is exported by the PI closed loop circuit according to the sample rate current value then, the output voltage stabilization of controlling described high pressure output unit by circuits for triggering is on a value between critical voltage and the breakdown voltage;
Overcurrent protection and signal recognition circuit, be located between the cut-out control input end of the sample rate current signal output part of described current sample and high pressure buffer circuit and described high pressure output unit, overcurrent protection and signal recognition circuit are according to judge whether there is the partial breakdown discharge in the described high voltage electric field from the sample rate current value of described current sample and high pressure buffer circuit, and when the partial breakdown discharge takes place, overcurrent protection and signal recognition circuit are controlled described high pressure output unit and are stopped output, 4-10 after second overcurrent protection and signal recognition circuit control described high pressure output unit and recover high pressure output; Simultaneously, the number of times of partial breakdown discharge appears in overcurrent protection and signal recognition circuit record in 1 minute; Surpass when setting numerical value if the number of times of partial breakdown discharge occurred in 1 minute, overcurrent protection and signal recognition circuit are controlled described high pressure output unit and are stopped output.
Further, be provided with soft starting circuit between the set-point input of the output of described electric field current setting circuit and PI closed loop circuit, be used for effectively controlling the overload impact electric current, guarantee the safe in utilization and service life of The whole control circuit.
Further, described high pressure output unit comprises: the high-voltage rectifying case that is used to generate HVDC output of high-tension transformer and the secondary end of being located at high-tension transformer.
Further, described circuits for triggering comprise: be located at high-tension transformer primary source end be used for the primary voltage of high-tension transformer is carried out the contactless trigger that the one-way SCR of one group of reversal connection that phase shift triggers, being used to of linking to each other with the control signal output of PI closed loop circuit are controlled the angle of flow of described each one-way SCR.
Further, the sampling current output of described high-voltage rectifying case is connected in series the sampling current input of ammeter and current sample and high pressure buffer circuit successively, is provided with current sampling resistor between the sampling current input of current sample and high pressure buffer circuit and the high-voltage earthing line; Described overcurrent protection and signal recognition circuit comprise: the overcurrent relay that links to each other with the sample rate current signal output part of described current sample and high pressure buffer circuit; be used to control the break-make of the control utmost point of described each one-way SCR, thereby open or close the output of described high-voltage rectifying case.
Further, described PI closed loop circuit comprises a pi regulator, the sample rate current signal output part of described current sample and high pressure buffer circuit and the output of described soft starting circuit all link to each other with the inverting input of this pi regulator, and the output of this pi regulator links to each other with the control signal input of described contactless trigger through the partial pressure potential device.
The technique effect that the utlity model has: the control circuit of (1) high-voltage static flue gas removing device of the present utility model is when operate as normal, the voltage of high voltage electric field is between described critical voltage and the breakdown voltage, if there is the fluctuation of power supply or load, current sample and high pressure buffer circuit obtain the corresponding sample rate current of fluctuation voltage with the output of high pressure output unit, and this sample rate current value fed back to the PI closed loop circuit, judge the voltage height of high pressure output unit output according to this sample rate current value by the PI closed loop circuit, the output voltage stabilization of controlling described high pressure output unit then is between critical voltage and breakdown voltage, thereby guaranteed the stable of high-pressure work point, so high-voltage static flue gas removing device of the present utility model has higher security and reliability.(2) during operate as normal, if the phenomenon of partial breakdown discharge takes place in the electric field, the number of times of partial breakdown discharge appears in overcurrent protection and the signal recognition circuit record unit time then; Surpass when setting numerical value if the number of times of partial breakdown discharge occurs in the unit interval, then be judged as permanent short circuit, overcurrent protection and signal recognition circuit are controlled described high pressure output unit and are stopped output.Otherwise, then be judged as glitter discharge (being instantaneous short-circuit), and control described high pressure output unit and continue the output high voltage source, thereby guarantee when instantaneous short-circuit takes place, the power-supply system of high-voltage static flue gas removing device can also operate as normal, so the service life of high-voltage static flue gas removing device of the present utility model long, have higher security and a reliability.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein
Fig. 1 is the voltage of electric field of high-voltage electrostatic field of the high-voltage static flue gas removing device among the embodiment and the graph of a relation of electric field electric current.Operating point when wherein, Q is the operate as normal of described high-voltage electrostatic field.
Fig. 2 is the circuit block diagram of the control circuit of the high-voltage static flue gas removing device among the embodiment.
Fig. 3 is the circuit theory diagrams of the control circuit of the high-voltage static flue gas removing device among the embodiment.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is elaborated:
As Fig. 1-3, the control circuit of the high-voltage static flue gas removing device of present embodiment comprises: electric field current setting circuit 1, PI closed loop circuit 3, circuits for triggering 4, high pressure output unit 5, current sample and high pressure buffer circuit 6 and overcurrent protection and signal recognition circuit 7.PI closed loop circuit 3 is the proportional integral closed control circuit.
Soft starting circuit 2 is located between the set-point input of the output of electric field current setting circuit 1 and PI closed loop circuit 3.When the control circuit of present embodiment used in energising, soft starting circuit 2 was made of delay circuit, and the process that is used to make the high pressure output of high pressure output unit 5 to present from low to high, slowly rise has been avoided too fast and boosted to the adverse effect of control circuit and electrical network.It is the trigger module circuit of ZK-3M that circuits for triggering 4 adopt model, and the triggering control input end of circuits for triggering 4 links to each other with the control signal output of PI closed loop circuit 3.
The high pressure output of high pressure output unit 5 is used for generating high voltage electric field at the oil smoke passage of high-voltage static flue gas removing device; The triggering signal output of circuits for triggering 4 links to each other with the voltage controling input end of high pressure output unit 5; Described PI closed loop circuit 3 is by the output voltage of circuits for triggering 4 control high pressure output units 5.
Current sample and high pressure buffer circuit 6 link to each other with the sampling current output of high pressure output unit 5, be used to obtain and the corresponding sample rate current of the output voltage of high pressure output unit 5, and the sample rate current value is fed back to the feedback signal input of PI closed loop circuit 3, also pass through the output voltage stabilization of the described high pressure output unit 5 of PI closed loop circuit 3 controls about 17.5kV with the voltage height of judging 5 outputs of high pressure output unit according to the sample rate current value, to guarantee the stable of high-pressure work point, prevent oil smoke high-voltage breakdown or ionization inefficacy.
Described overcurrent protection and signal recognition circuit 7 are located between the cut-out control input end of the sample rate current signal output part of described current sample and high pressure buffer circuit 6 and described high pressure output unit 5, overcurrent protection and signal recognition circuit 7 are according to judge whether there is the partial breakdown discharge in the described high voltage electric field from the sample rate current value of described current sample and high pressure buffer circuit 6, and when the partial breakdown discharge takes place, overcurrent protection and the described high pressure output unit 5 of signal recognition circuit 7 controls stop output, in 4-10 overcurrent protection and described high pressure output unit 5 recovery high pressure outputs of signal recognition circuit 7 controls after second; Simultaneously, the number of times of partial breakdown discharge appears in overcurrent protection and signal recognition circuit 7 records in 1 minute; When surpassing 5 times as if the number of times that occurred the partial breakdown discharge in 1 minute, overcurrent protection and the described high pressure output unit 5 of signal recognition circuit 7 controls stop output.
Described high pressure output unit 5 comprises: the high-voltage rectifying case 51 that is used to generate HVDC output of high-tension transformer B1 and the secondary end of being located at high-tension transformer B1.
Described circuits for triggering 4 comprise: the unidirectional controllable silicon S CR1 that is used for the primary voltage of high-tension transformer B1 is carried out one group of reversal connection that phase shift triggers that is located at high-tension transformer B1 primary source end and SCR2, being used to of linking to each other with the control signal output of PI closed loop circuit 3 are controlled the contactless trigger CF of the angle of flow of described each unidirectional controllable silicon S CR1 and SCR2.By the angle of flow of control unidirectional controllable silicon S CR1 and SCR2, can control the height of the output voltage of high-voltage rectifying case 51.
The sampling current output of high-voltage rectifying case 51 is connected in series the sampling current input of ammeter mA and current sample and high pressure buffer circuit 6 successively, is provided with current sampling resistor R1 between the sampling current input of current sample and high pressure buffer circuit 6 and the high-voltage earthing line; Electric field current setting circuit 1 is located at preset value (be generally about 45mA, detect described electric field electric current by ammeter mA) with the electric field electric current in the described oil smoke passage, so that the voltage of electric field in the described oil smoke passage is stabilized in critical voltage V
L(being 15kV) and breakdown voltage V
JOn the value (being generally about 17.5kV) between (being 20kV).
Overcurrent protection and signal recognition circuit 7 comprise: the over-current signal recognition unit 71 that the overcurrent relay GL that links to each other with the sample rate current signal output part of described current sample and high pressure buffer circuit 6 links to each other with the relay coil with overcurrent relay GL; overcurrent relay GL is used for the break-make of the relay normally-closed contact GLK that control that when the partial breakdown discharge takes place control is series at described each unidirectional controllable silicon S CR1 and SCR2 extremely goes up, thereby opens or close the output of described high-voltage rectifying case 51.
Described PI closed loop circuit 3 includes the pi regulator that operational amplifier A 1, resistance R 3, R4 and capacitor C 1 constitute, the sample rate current signal output part of described current sample and high pressure buffer circuit 6 links to each other with the inverting input of this pi regulator through current-limiting resistance R2, the output of described soft starting circuit 2 links to each other with the inverting input of this pi regulator, and the output of this pi regulator links to each other with the control signal input of described contactless trigger CF through partial pressure potential device R6.
Described pi regulator is proportional-integral controller.The inverting input of pi regulator is the inverting input of the operational amplifier in the pi regulator.
Over-current signal recognition unit 71 is according to judge whether there is the partial breakdown discharge in the described high voltage electric field from the sample rate current value of described current sample and high pressure buffer circuit 6, and when the partial breakdown discharge takes place, control described high pressure output unit 5 by overcurrent relay GL and stop output, control pi regulator simultaneously and stop output.4-10 after second over-current signal recognition unit 71 control pi regulators restart output, and control described high pressure output unit 5 by overcurrent relay GL and recover high pressure output; Simultaneously, the number of times of partial breakdown discharge appears in over-current signal recognition unit 71 records in 1 minute; When surpassing 5 times as if the number of times that occurred the partial breakdown discharge in 1 minute, the described high pressure output unit 5 of over-current signal recognition unit 71 controls stops output, controls pi regulator simultaneously and stops to export.Over-current signal recognition unit 71 is controlled described high pressure output unit 5 and is stopped to export by overcurrent relay GL when, the control pi regulator stops output, can realize that the two-way control circuit controls the purpose that described high pressure output unit 5 stops to export, guarantee the reliability and the security of the control circuit of present embodiment.Over-current signal recognition unit 71 is made of single-chip microcomputer or analog control circuit.
Obviously, the foregoing description only is for the utility model example clearly is described, and is not to be qualification to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection domain of the present utility model.
Claims (6)
1. the control circuit of a high-voltage static flue gas removing device is characterized in that comprising:
Electric field current setting circuit (1);
PI closed loop circuit (3), the set-point input of this PI closed loop circuit (3) links to each other with the output of described electric field current setting circuit (1);
Circuits for triggering (4) link to each other with the control signal output of PI closed loop circuit (3);
High pressure output unit (5) is used for generating high voltage electric field at the oil smoke passage of high-voltage static flue gas removing device; The triggering signal output of described circuits for triggering (4) links to each other with the voltage controling input end of high pressure output unit (5); Described PI closed loop circuit (3) is by the output voltage of circuits for triggering (4) control high pressure output units (5);
Current sample and high pressure buffer circuit (6), link to each other with the sampling current output of high pressure output unit (5), be used to obtain the corresponding sample rate current of output voltage with high pressure output unit (5), and the sample rate current value fed back to the feedback signal input of PI closed loop circuit (3);
Overcurrent protection and signal recognition circuit (7) are located between the cut-out control input end of the sample rate current signal output part of described current sample and high pressure buffer circuit (6) and described high pressure output unit (5).
2. the control circuit of high-voltage static flue gas removing device according to claim 1 is characterized in that: be provided with soft starting circuit (2) between the set-point input of the output of described electric field current setting circuit (1) and PI closed loop circuit (3).
3. the control circuit of high-voltage static flue gas removing device according to claim 2, it is characterized in that: described high pressure output unit (5) comprising: high-tension transformer (B1) and be located at the high-voltage rectifying case (51) that is used to generate HVDC output of the secondary end of high-tension transformer (B1).
4. according to the control circuit of one of claim 1-3 described high-voltage static flue gas removing device, it is characterized in that: described circuits for triggering (4) comprising: be located at high-tension transformer (B1) primary source end be used for the primary voltage of high-tension transformer (B1) is carried out the contactless trigger (CF) that the one-way SCR (SCR1 and SCR2) of one group of reversal connection that phase shift triggers, being used to of linking to each other with the control signal output of PI closed loop circuit (3) are controlled the angle of flow of described each one-way SCR (SCR1 and SCR2).
5. the control circuit of high-voltage static flue gas removing device according to claim 3, it is characterized in that: the sampling current output of described high-voltage rectifying case (51) is connected in series the sampling current input of ammeter (mA) and current sample and high pressure buffer circuit (6) successively, is provided with current sampling resistor (R1) between the sampling current input of current sample and high pressure buffer circuit (6) and the high-voltage earthing line;
Described overcurrent protection and signal recognition circuit (7) comprising: being used to of linking to each other with the sample rate current signal output part of described current sample and high pressure buffer circuit (6) controlled the break-make of the control utmost point of described each one-way SCR (SCR1 and SCR2) to open or to close the overcurrent relay (GL) of the output of described high-voltage rectifying case (51).
6. the control circuit of high-voltage static flue gas removing device according to claim 5, it is characterized in that: described PI closed loop circuit (3) comprises a pi regulator, the output of the sample rate current signal output part of described current sample and high pressure buffer circuit (6) and described soft starting circuit (2) all links to each other with the inverting input of this pi regulator, and the output of this pi regulator links to each other through the control signal input of partial pressure potential device (R6) with described contactless trigger (CF).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201403416U CN201618612U (en) | 2010-03-13 | 2010-03-13 | Control circuit for high-voltage electrostatic oily fume removers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201403416U CN201618612U (en) | 2010-03-13 | 2010-03-13 | Control circuit for high-voltage electrostatic oily fume removers |
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| Publication Number | Publication Date |
|---|---|
| CN201618612U true CN201618612U (en) | 2010-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201403416U Expired - Fee Related CN201618612U (en) | 2010-03-13 | 2010-03-13 | Control circuit for high-voltage electrostatic oily fume removers |
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| CN (1) | CN201618612U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080720A (en) * | 2015-09-01 | 2015-11-25 | 苏州瓷气时代净化设备有限公司 | High-voltage electrostatic precipitation air purifier |
| CN110248737A (en) * | 2017-01-30 | 2019-09-17 | 净化空气企业有限公司 | Electronic filter |
-
2010
- 2010-03-13 CN CN2010201403416U patent/CN201618612U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080720A (en) * | 2015-09-01 | 2015-11-25 | 苏州瓷气时代净化设备有限公司 | High-voltage electrostatic precipitation air purifier |
| CN110248737A (en) * | 2017-01-30 | 2019-09-17 | 净化空气企业有限公司 | Electronic filter |
| US11311888B2 (en) | 2017-01-30 | 2022-04-26 | Clean Air Enterprise Ag | Electrostatic precipitator |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20130313 |