CN103256237A - Cement plant pressure fan energy-saving control system - Google Patents
Cement plant pressure fan energy-saving control system Download PDFInfo
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- CN103256237A CN103256237A CN 201210033967 CN201210033967A CN103256237A CN 103256237 A CN103256237 A CN 103256237A CN 201210033967 CN201210033967 CN 201210033967 CN 201210033967 A CN201210033967 A CN 201210033967A CN 103256237 A CN103256237 A CN 103256237A
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- saving control
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Abstract
The invention discloses a cement plant pressure fan energy-saving control system. The cement plant pressure fan energy-saving control system comprises a fan, a universal joint coupling, a motor, a distributed control system signal converter, a PLC (programmable logic controller) and a motor driving controller, wherein the distributed control system signal converter, the PLC, the motor driving controller, the motor, the universal joint coupling and the fan are connected sequentially; and 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 connected with one end of the second switch and a fixed contact of the third switch respectively, 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 universal joint coupling and the fan. The cement plant pressure fan energy-saving control system can achieve the stepless changing of the rotating speed of the fan, thereby adjusting the air quantity and air pressure of the fan accurately, improving the operating efficiency of the fan and reducing the energy consumption of the fan remarkably.
Description
Technical field
The present invention relates to a kind of blower fan energy-saving control system, relate 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, the blower fan power consumption accounts for about the 30%-40% of total power consumption, increasing employing along with the 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 is that some energy consumes on valve, and slip loss is big, and efficient is low, and 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-conservation, in adjustment process, to 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 invention provides a kind of cement plant pressure fan energy-saving control system, realize the rotation speed of fan stepless transformation, and then accurately regulate the fan delivery blast, improve the operational efficiency of blower fan, significantly reduce the energy consumption of blower fan.
The present invention 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, the universal joint shaft joint, motor, the distributed control system signal adapter, programmable controller and motor drive controller, described distributed control system signal adapter, programmable controller, motor drive controller, motor, the universal joint shaft joint is connected successively with blower fan, described motor drive controller comprises first switch, second switch, the 3rd switch and frequency variator, described the 3rd switch is single-pole double-throw switch (SPDT), described first switch, one end connects high voltage bus, the described first switch the other end connects a fixed contact of described second switch one end and the 3rd switch respectively, the described second switch the other end connects described frequency variator one end, the described frequency variator the other end connects another fixed contact of described the 3rd switch, and the moving contact of described the 3rd switch connects described motor successively, gimbal coupling and blower fan.
The invention has the beneficial effects as follows: realized the stepless time adjustment 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 structural representation of the present invention.
By reference to the accompanying drawings, make the following instructions:
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, described distributed control system signal adapter, programmable controller, motor drive controller, motor, the universal joint shaft joint is connected successively with blower fan, described motor drive controller comprises the first switch QF1, second switch QS1, the 3rd switch QS2 and frequency variator 7, described the 3rd switch is single-pole double-throw switch (SPDT), described first switch, one end connects high voltage bus 8, the described first switch the other end connects a fixed contact of described second switch one end and the 3rd switch respectively, the described second switch the other end connects described frequency variator one end, the described frequency variator the other end connects another fixed contact of described the 3rd switch, and the moving contact of described the 3rd switch connects described motor successively, gimbal coupling and blower fan.
The working principle of this control system is: the DCS that collects by the DCS signal adapter starts shooting, shutdown, air quantity, the blast order, be transferred to programmable controller again, can work out and be integrated with PLC Energy Saving Control software in the controller, and calculate by this PLC Energy Saving Control software, the discernible signal of output power drive controller, the electric drive controller makes frequency variator export corresponding 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, save the energy consumption of fan motor simultaneously, improve 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: disconnect 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: disconnect the first switch QF1 earlier, the connection between closed second switch QS1 and the 3rd switch QS2 and the frequency variator, the closed first switch QF1 again, frequency variator translator converting operation; During the maintenance frequency variator, disconnect second switch QS1.
The power frequency bypass was put in manual switchover when control setting of the present invention 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), described distributed control system signal adapter, programmable controller, motor drive controller, motor, the universal joint shaft joint is connected successively with blower fan, it is characterized in that: described motor drive controller comprises first switch (QF1), second switch (QS1), the 3rd switch (QS2) and frequency variator (7), described the 3rd switch is single-pole double-throw switch (SPDT), described first switch, one end connects high voltage bus (8), the described first switch the other end connects a fixed contact of described second switch one end and the 3rd switch respectively, the described second switch the other end connects described frequency variator one end, the described frequency variator the other end connects another fixed contact of described the 3rd switch, and the moving contact of described the 3rd switch connects described motor successively, gimbal coupling and blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210033967 CN103256237A (en) | 2012-02-15 | 2012-02-15 | Cement plant pressure fan energy-saving control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210033967 CN103256237A (en) | 2012-02-15 | 2012-02-15 | Cement plant pressure fan energy-saving control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103256237A true CN103256237A (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210033967 Pending CN103256237A (en) | 2012-02-15 | 2012-02-15 | Cement plant pressure fan energy-saving control system |
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| CN (1) | CN103256237A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510513A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | A kind of side pushes away big function equipment Soft Starting System |
| CN112682310A (en) * | 2020-12-18 | 2021-04-20 | 江西三川节能股份有限公司 | Cement plant high temperature fan economizer system |
| CN113566231A (en) * | 2021-09-06 | 2021-10-29 | 南京钢铁股份有限公司 | Energy-saving control method for combustion fan of heating furnace |
-
2012
- 2012-02-15 CN CN 201210033967 patent/CN103256237A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510513A (en) * | 2018-07-18 | 2019-03-22 | 上海锐机电有限公司 | A kind of side pushes away big function equipment Soft Starting System |
| CN112682310A (en) * | 2020-12-18 | 2021-04-20 | 江西三川节能股份有限公司 | Cement plant high temperature fan economizer system |
| CN113566231A (en) * | 2021-09-06 | 2021-10-29 | 南京钢铁股份有限公司 | Energy-saving control method for combustion fan of heating furnace |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130821 |