CN202579251U - Energy-saving control system for pressure fan of cement plant - Google Patents
Energy-saving control system for pressure fan of cement plant Download PDFInfo
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- CN202579251U CN202579251U CN 201220048834 CN201220048834U CN202579251U CN 202579251 U CN202579251 U CN 202579251U CN 201220048834 CN201220048834 CN 201220048834 CN 201220048834 U CN201220048834 U CN 201220048834U CN 202579251 U CN202579251 U CN 202579251U
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- control system
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- motor
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Abstract
The utility model discloses an energy-saving control system for a pressure fan of a cement plant. The energy-saving control system comprises a fan, a cardan joint coupling device, a motor, a distributed control system signal converter, a programmable logic controller and a motor driving controller, wherein the distributed control system signal converter, the programmable logic controller, the motor driving controller, the motor, the cardan joint coupling device and the fan are sequentially connected with one another, the motor driving controller comprises a first switch, a second switch, a third switch and a frequency converter, the third switch is a single-pole double-throw switch, one end of the first switch is connected with a high voltage bus, the other end of the first switch is respectively connected with one end of the second switch and one fixed contact of the third switch, the other end of the second switch is connected with one end of the frequency converter, the other end of the frequency converter is connected with the other fixed contact of the third switch, and a moving contact of the third switch is sequentially connected with the motor, the cardan joint coupling device and the fan. According to the control system, the stepless change of the rotation speed of the fan can be realized, the air quantity and the air pressure of the fan can be accurately adjusted, the running efficiency of the fan can be improved, and the energy consumption of the fan can be observably reduced.
Description
Technical field
The utility model relates to a kind of blower fan energy-saving control system, relates in particular to a kind of cement plant pressure fan energy-saving control system.
Background technique
Cement industry is the energy consumption rich and influential family; In cement production process; The grinding of participation regulating working conditions and the blower fan power consumption of firing system are very big, and the blower fan power consumption accounts for about the 30%-40% of total power consumption, along with the increasing employing of roller mill system; The proportion of blower fan power consumption is increasing, particularly Middle pressure draught fan.The type selecting of blower fan designs according to full load condition; And in actual production process with the variation of operating mode and output; Can cause that air quantity, blast adjust at random, the current Fan Regulation mode that generally adopts is that flow limit method and fluid coupling add the rheostatic startup mode of speed regulation of liquid.The flow limit method shortcoming be some energy consumption on valve, slip loss is big, efficient is low, energy dissipation is more serious.The shortcoming that fluid coupling adds the rheostatic startup mode of speed regulation of liquid is that motor output end rotating speed rotating speed is constant in speed regulation process; Therefore power demand is constant; Can only reach the speed governing purpose, can not realize energy-conservationly, in adjustment process, will produce simultaneously power and mechanical equal loss; Follow loss to produce a large amount of heats, need water cooling.Simultaneously, also there are phenomenons such as adjusting speed accuracy is low, speed responsive low-rotate speed instability.
Summary of the invention
In order to overcome above-mentioned defective, the utility model provides a kind of cement plant pressure fan energy-saving control system, realizes the rotation speed of fan stepless transformation, and then accurately regulates the fan delivery blast, improves the operational efficiency of blower fan, significantly reduces the energy consumption of blower fan.
The utility model for the technological scheme that solves its technical problem and adopt is: a kind of cement plant pressure fan energy-saving control system; Comprise blower fan, universal joint shaft joint, motor, distributed control system signal adapter, programmable controller and motor drive controller; Said distributed control system signal adapter, programmable controller, motor drive controller, motor, universal joint shaft joint are connected with blower fan successively; Said motor drive controller comprises first switch, second switch, the 3rd switch and frequency variator; Said the 3rd switch is a single-pole double-throw switch (SPDT); Said first switch, one end connects high voltage bus, and the said first switch the other end connects a fixed contact of said second switch one end and the 3rd switch respectively, and the said second switch the other end connects said frequency variator one end; The said frequency variator the other end connects another fixed contact of said the 3rd switch, and the moving contact of said the 3rd switch connects said motor, gimbal coupling and blower fan successively.
The beneficial effect of the utility model is: realized the stepless speed regulation of highi degree of accuracy, wide range, satisfied the needs of various complicated technologies comprehensively.The energy-saving effect of fan-type load is the most obvious, and power saving rate can reach 20%-60%.Motor and load machinery are realized real soft start, and inrush current is little, has thoroughly solved the startup shock problem, motor can be at short notice repeated priming repeatedly.Can realize local compensation to motor power factor, improve the effective rate of utilization of power supply unit capacity, reduce power supply capacity.
Description of drawings
Fig. 1 is the utility model structural representation.
In conjunction with accompanying drawing, explanation below doing:
1---blower fan 2---universal joint shaft joint
3---motor 5---programmable controller
4---the distributed control system signal adapter
6---motor drive controller 7---frequency variator
QF1---first switch QS1---second switch
QS2---the 3rd switch 8---high voltage bus
Embodiment
A kind of cement plant pressure fan energy-saving control system; Comprise blower fan 1, universal joint shaft joint 2, motor 3, distributed control system (DCS) signal adapter 4, programmable controller (PLC) 5 and motor drive controller 6; Said distributed control system signal adapter, programmable controller, motor drive controller, motor, universal joint shaft joint are connected with blower fan successively; Said motor drive controller comprises the first switch QF1, second switch QS1, the 3rd switch QS2 and frequency variator 7; Said the 3rd switch is a single-pole double-throw switch (SPDT); Said first switch, one end connects high voltage bus 8, and the said first switch the other end connects a fixed contact of said second switch one end and the 3rd switch respectively, and the said second switch the other end connects said frequency variator one end; The said frequency variator the other end connects another fixed contact of said the 3rd switch, and the moving contact of said the 3rd switch connects said motor, gimbal coupling and blower fan successively.
The working principle of this control system is: DCS start, shutdown, air quantity, blast order through the DCS signal adapter collects, be transferred to programmable controller again, and can work out and be integrated with PLC Energy Saving Control software in the controller; And calculate through this PLC Energy Saving Control software; The discernible signal of output power drive controller, electric drive controller make frequency variator output correspondent frequency after receiving this signal, realize regulating rotating speed of motor; Fan speed and motor speed are changed synchronously; Thereby reach the purpose of regulating fan delivery, the energy consumption of saving fan motor simultaneously improves fan operation efficient.
The control flow of this control system is: before this system's operation, close the first switch QF1; Switching the power frequency process is: break off the connection between second switch QS1 and the 3rd switch QS2 and the frequency variator, close the first switch QF1 again, the motor power frequency operation; Power frequency is switched conversion process: break off the first switch QF1, the connection between closed second switch QS1 and the 3rd switch QS2 and the frequency variator, the closed again first switch QF1, frequency variator translator converting operation earlier; During the maintenance frequency variator, break off second switch QS1.
The power frequency bypass was put in manual switchover when the control setting of the utility model can make converter plant stop using, to guarantee the operation of whole system.Owing to adopt a single-pole double-throw switch (SPDT) in bypass and outlet, can guarantee the situation that frequency conversion and power frequency can not occur moving simultaneously, and the quantity that can reduce the fault point like this, make system maintenance, operation safer reliably.
Claims (1)
1. cement plant pressure fan energy-saving control system; Comprise blower fan (1), universal joint shaft joint (2), motor (3), distributed control system signal adapter (4), programmable controller (5) and motor drive controller (6); Said distributed control system signal adapter, programmable controller, motor drive controller, motor, universal joint shaft joint are connected with blower fan successively; It is characterized in that: said motor drive controller comprises first switch (QF1), second switch (QS1), the 3rd switch (QS2) and frequency variator (7); Said the 3rd switch is a single-pole double-throw switch (SPDT); Said first switch, one end connects high voltage bus (8), and the said first switch the other end connects a fixed contact of said second switch one end and the 3rd switch respectively, and the said second switch the other end connects said frequency variator one end; The said frequency variator the other end connects another fixed contact of said the 3rd switch, and the moving contact of said the 3rd switch connects said motor, gimbal coupling and blower fan successively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220048834 CN202579251U (en) | 2012-02-15 | 2012-02-15 | Energy-saving control system for pressure fan of cement plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201220048834 CN202579251U (en) | 2012-02-15 | 2012-02-15 | Energy-saving control system for pressure fan of cement plant |
Publications (1)
Publication Number | Publication Date |
---|---|
CN202579251U true CN202579251U (en) | 2012-12-05 |
Family
ID=47248667
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201220048834 Expired - Lifetime CN202579251U (en) | 2012-02-15 | 2012-02-15 | Energy-saving control system for pressure fan of cement plant |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN202579251U (en) |
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2012
- 2012-02-15 CN CN 201220048834 patent/CN202579251U/en not_active Expired - Lifetime
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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: 20121205 |
|
CX01 | Expiry of patent term |