CN208364453U - The converting operation device of desulfurization single-stage high-speed centrifugal blower - Google Patents
The converting operation device of desulfurization single-stage high-speed centrifugal blower Download PDFInfo
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- CN208364453U CN208364453U CN201820712336.4U CN201820712336U CN208364453U CN 208364453 U CN208364453 U CN 208364453U CN 201820712336 U CN201820712336 U CN 201820712336U CN 208364453 U CN208364453 U CN 208364453U
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Abstract
The utility model discloses a kind of converting operation devices of desulfurization single-stage high-speed centrifugal blower, it include: permanent magnet synchronous motor, the single-stage high-speed centrifugal blower being connected on the permanent magnet synchronous motor and the frequency converter for permanent magnet synchronous motor described in drive control, the inverter input is connected with power frequency supply, and the inverter output terminal is connected with the permanent magnet synchronous motor output shaft；Wherein, the single-stage high-speed centrifugal blower is used to for oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite, and the permanent magnet synchronous motor is matched with the single-stage high-speed centrifugal blower.The utility model additionally provides a kind of converting operation method of the converting operation device of desulfurization single-stage high-speed centrifugal blower.The utility model has the beneficial effects that the operating condition of single-stage high-speed centrifugal blower can be adjusted according to the practical operation situation of unit, the waste of equipment is reduced, the operating cost at the scene of reducing.
Description
Technical field
The utility model relates to technical field of desulfurization, in particular to a kind of desulfurization single-stage high-speed centrifugal blower
Converting operation device.
Background technique
Guaranteeing normal, the stable operation of unit simultaneously, needing to be optimized system structure, reduce the energy consumption of system,
Necessary measures to effectively increase energy savings and reduce material consumption are used, in desulphurization system to reduce the operating cost of desulphurization system, it will generate to a certain degree
On economic benefit and environmental effect.In entire desulphurization system, if desulfurizing agent is agstone, the power consumption of oxidation fan accounts for about
The 10% of desulphurization system；If desulfurizing agent is limestone block, the power consumption of oxidation fan accounts for about the 6~8% of desulphurization system, oxidation fan
Specific gravity of the power consumption in the power consumption of desulphurization system it is also relatively large, it is energy-saving to be of great significance.
Oxidation fan in desulphurization system be broadly divided into single-stage high-speed centrifugal blower, Multi-stage centrifugal fan and single-stage high-speed from
Three kinds of forms of heart blower, the wherein method of operation and control mode of Multi-stage centrifugal fan and single-stage high-speed centrifugal blower substantially phase
Together, the operation of single-stage high-speed centrifugal blower and centrifugal blower is not identical.Centrifugal blower promotes fan outlet using the revolving speed of impeller
Air quantity and pressure, fans entrance is provided with air inlet baffle door, under present circumstances, by adjusting the aperture of inlet baffle door, from
And air quantity and pressure head are adjusted, but the aperture of baffle door influences whether the crushing of blower inlet and outlet, this part can become blower sheet
The energy loss of body.
Desulfurization is mostly stationary state operation with single-stage high-speed centrifugal blower, and scene will not be with unit load and scene
Actual conditions be adjusted correspondingly operation, which joins in unit compared with large load operation or desulphurization system inlet flue gas
Operating condition is suitable when number matches with design, easily occurs biggish energy waste in actual motion.Blower is in actual operation
Flow total flow is that boiler load is followed to change.Therefore, it is necessary to the work to blower to carry out adjusting appropriate.So-called tune
Section, exactly manually changes the position of blower operating point, makes the output flow and actual needs amount phase equilibrium of blower.Existing adjusting
There are two ways to type: first is that changing pipe resistance characteristic curve changes blower operating point；Second is that it is bent to change fan characteristic
Line changes blower operating point.Although there is the adjusting to single-stage high-speed centrifugal blower at present, maintaining rotation speed of fan constant
In the case where, throttling set (gate, baffle, air door etc.) is installed in network system, changes its open degree, increases or reduces net
Network resistance, to carry out the adjusting of flow, wind pressure, this method adjustment equipment is simple but uneconomical, does not meet power conservation requirement.
Meanwhile originally single-stage high-speed centrifugal blower is asynchronous motor, although its is stable, failure rate is low, from Energy Angle
From the point of view of, asynchronous motor can not embody energy-saving effect.In order to guarantee desulphurization system safe and economical operation, desulfurization single machine high speed
Centrifugal blower is adjusted with the operating load of unit, the variation needs of Gas Parameters.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of desulfurization changes of single-stage high-speed centrifugal blower
Frequency running gear can adjust the operating condition of single-stage high-speed centrifugal blower according to the practical operation situation of unit, reduce equipment
Waste, the operating cost at the scene of reducing.
The utility model provides a kind of converting operation device of desulfurization single-stage high-speed centrifugal blower, comprising: permanent magnetism is same
Step motor, the single-stage high-speed centrifugal blower that is connected on the permanent magnet synchronous motor and same for permanent magnetism described in drive control
The frequency converter of motor is walked, the inverter input is connected with power frequency supply, the inverter output terminal and the permanent-magnet synchronous
Motor output shaft is connected；
The frequency converter is located in frequency conversion tank, including rectifier, filter, inverter and controller, and the rectifier is defeated
Enter end to be connected with power frequency supply, the rectifier output end is connected with the filter input end, the filter output with
The inverter input terminal is connected, and the inverter output end is connected with the permanent magnet synchronous motor output shaft, the rectifier,
The filter and the inverter are connected with the controller；
Speed probe, the speed probe and the controller phase are provided on the single-stage high-speed centrifugal blower
Even；
Wherein, the single-stage high-speed centrifugal blower is strong by calcium sulfite for oxidation air to be delivered in desulfuration absorbing tower
Oxygenerating, the permanent magnet synchronous motor are matched with the single-stage high-speed centrifugal blower.
It is further improved as the utility model, the single-stage high-speed centrifugal blower passes through with the permanent magnet synchronous motor
Shaft coupling is connected.
It is further improved as the utility model, the controller includes:
Detection circuit: the smoothed out voltage of the filter filtering, current signal are detected；
Computing circuit: the speed signal of the speed probe is compared with electric current, the voltage signal of detection circuit
Operation determines output voltage, the frequency of the inverter；
Driving circuit: the on, off of the switching device of the inverter is driven according to determining output voltage, frequency；
It protects circuit: the inverter is protected when overload or overvoltage occurs according to the output voltage of the inverter
With the permanent magnet synchronous motor.
The utility model has the following beneficial effects:
1, since variable speed is adjusted, flow is directly proportional to the first power of revolving speed, pressure and revolving speed it is square directly proportional, and manage
Net characteristic curve pressure and flow it is square directly proportional, so the power efficiency before and after rotational speed regulation varies less, revolving speed can be made
It adjusts rear venting machine still to run in high efficient district, can be realized 0~25% energy conservation, it is even more；
2, the starting of single-stage high-speed centrifugal blower can gradually be run, and avoid starting and stopping suddenly for scene, Neng Gougeng
Equipment is protected well, increases the service life of equipment and its components, reduces site examining and repairing maintenance and maintenance cost；
3, the operation conditions for the single-stage high-speed centrifugal blower that scene can be adjusted according to the practical operation situation of unit, is reduced
The waste of equipment, the operating cost at the scene of reducing.
4, pressure does not have supplementary loss to adjustable range greatly, after variable speed, and single-stage high-speed centrifugal blower efficiency change is not
Greatly, energy conservation, economic performance are good；
5, gearshift adjustment can reduce the noise of single-stage high-speed centrifugal blower after reducing revolving speed, mitigate single-stage high-speed and be centrifuged wind
The abrasion of machine impeller extends the service life of impeller.
Detailed description of the invention
Fig. 1 is a kind of converting operation device of desulfurization single-stage high-speed centrifugal blower described in the utility model embodiment
Schematic diagram.
In figure,
1, permanent magnet synchronous motor；2, frequency converter；3, single-stage high-speed centrifugal blower.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.
As shown in Figure 1, a kind of converting operation device of desulfurization single-stage high-speed centrifugal blower of the utility model embodiment,
It include: permanent magnet synchronous motor 1, the single-stage high-speed centrifugal blower 3 being connected on permanent magnet synchronous motor 1 and for drive control
The frequency converter 2 of permanent magnet synchronous motor 1,2 input terminal of frequency converter are connected with power frequency supply, 2 output end of frequency converter and permanent magnet synchronous electric
1 output shaft of machine is connected；
Frequency converter 2 is located in frequency conversion tank, including rectifier, filter, inverter and controller, rectifier input and work
Frequency power is connected, and rectifier output end is connected with filter input end, and filter output is connected with inverter input terminal, inversion
Device output end is connected with 1 output shaft of permanent magnet synchronous motor, and rectifier, filter and inverter are connected with controller；
Speed probe is provided on single-stage high-speed centrifugal blower 3, speed probe is connected with controller；
Wherein, single-stage high-speed centrifugal blower 3 forces calcium sulfite for oxidation air to be delivered in desulfuration absorbing tower
Oxidation, permanent magnet synchronous motor 1 are matched with single-stage high-speed centrifugal blower 3.
Industrial-frequency alternating current is converted to direct current by rectifier, and the direct current after conversion is filtered smoothly by filter, inverse
Become device by the DC conversion after filtering at different frequency, width, amplitude square wave, controller transmits a signal to rectification
Device, filter and inverter, while the signal from these parts is received, and control frequency, amplitude and the pulsewidth of output square wave,
So that it is superposed to the alternating current of approximate sine wave, drives permanent magnet synchronous motor 1.
Single-stage high-speed centrifugal blower 3 is connected with permanent magnet synchronous motor 1 by shaft coupling.
Wherein, controller includes:
Detection circuit: voltage, current signal after Fault detection filter filtering；
Computing circuit: being compared operation with electric current, the voltage signal of detection circuit for the speed signal of speed probe,
Determine output voltage, the frequency of inverter；
Driving circuit: according to the on, off of determining output voltage, the switching device of frequency driving inverter；
It protects circuit: according to the output voltage of inverter, when overload or overvoltage occurs, protecting inverter and permanent magnetism same
Walk motor 1.
Matching used asynchronous machine is replaced with permanent magnet synchronous motor, the structure of permasyn morot by the utility model
Simply, small in size, reliable operation, failure rate is low, is natural fire-proof motor, the stationary part with three phase asynchronism induction-motor
Almost the same, the main distinction is in rotor portion, and rotor uses solid construction, sets copper rod starting cage modle, preset magnet
Material, a large amount of magnetic field of loss needed for providing motor power conversion by permanent magnet, incudes magnetic energy instead of traditional rotor windings
Excitation is provided, electrical excitation collector ring brush and field power supply are eliminated.It has the following characteristics that
(1) having the characteristics that high efficiency, high energy conservation economic operation characteristic range, wide (when being supported on 25~120%, efficiency can
Up to 95% or more), for example when load factor is 50%, the efficiency of asynchronous machine drops to 89%, and permanent-magnet synchronous frequency conversion still can be with
Keep 95% it is efficient.
(2) have the characteristics that high start torque, high insertion torque, exceed loading capability, high power density, so that same in permanent magnetism
When walking frequency conversion and frequency converter or being used cooperatively with permanent-magnet synchronous variable frequency soft starter, it can be substantially reduced according to practical shaft power
The installed capacity of device drives motor reduces the no-load loss of motor.
(3) has the characteristics that High Power Factor (power factor is up to 98% or more), so that no longer needing to mention in power supply system
For idle, reactive power compensator is eliminated, equipment investment and fault point are reduced.Simultaneously because active and reactive electric current is big
Width decline (than with capacity asynchronous motor decline 30%), so that all service cable sections, supply transformer, mother's board in cabinet, opening
The capacity such as pass can all reduce, and while reducing equipment investment, reduce the loss of transformer and transmission line of electricity.
(4) have the characteristics that high reliability, high interchangeability, i.e., have identical seat No. with the asynchronous machine of same capacity and go out
Line mode, so that permanent-magnet synchronous frequency conversion replacement asynchronous machine is very simple and convenient.
The flow Q of single-stage high-speed centrifugal blower is directly proportional to rotation speed of fan n, wind pressure P and rotation speed of fan n square at just
It is cube more directly proportional than, fan shaft power N and rotation speed of fan n, selection best operating point may be implemented by changing revolving speed.Change
The target of selection best operating point may be implemented in single-stage high-speed centrifugal blower revolving speed, rationally controls actual air volume, that is, uninterrupted,
According to the single-stage high-speed centrifugal blower revolving speed relationship directly proportional to power, the revolving speed of single-stage high-speed centrifugal blower reduces, and single-stage is high
Fast centrifugal blower needs the electrical power consumed also to decline, to realize the energy-saving of single-stage high-speed centrifugal blower.Change single-stage
The revolving speed of high-speed centrifugal fan not only can change fan performance, but also energy-saving effect is obvious, meanwhile, single-stage high-speed is centrifuged wind
When the revolving speed of machine changes, efficiency is remained unchanged.
After converting operation device using the desulfurization single-stage high-speed centrifugal blower of the utility model, desulphurization system and oxidation
Fan Energy-saving consumption reduction situation table is as follows:
From the results, it was seen that single-stage high-speed centrifugal blower can be realized 0~25% section using this speed regulation device
Can, even more, the starting of single-stage high-speed centrifugal blower can gradually be run, and avoid starting and stopping suddenly for scene, can
Equipment is preferably protected, the service life of equipment and its components is increased, reduces site examining and repairing maintenance and maintenance cost.
The advantages of converting operation device of the utility model:
(1) speed efficiency is high, belongs to efficient mode of speed regulation.This is because permanent magnet synchronous motor still exists after frequency variation
Synchronous rotational speed is nearby run, and keeps specified slip substantially, and unsteady flow can be only generated in frequency conversion device system and is lost, and due to
The loss of the influence of higher hamonic wave, permanent magnet synchronous motor increases, so that efficiency is declined.
(2) speed-regulating range width, it is general up to 20:1, there is high speed efficiency, frequency control in entire speed adjustable range
Suitable for speed-regulating range width, and often in the occasion run under low load condition.
(3) mechanical property is harder, and when without automatically controlling, relative speed variation is below 5%；When using automatically controlling,
High-precision can be done to run, speed fluctuation rate is controlled 0.5~1% or so.
(4) converting operation device, can be out of service just in case break down, and changes and is directly powered by power grid, single-stage high-speed from
Heart blower may continue to keep operating.
(5) starting device can be doubled as, i.e., permanent magnet synchronous motor is started to by a certain revolving speed by frequency converter, then disconnect frequency conversion
Device, permanent magnet synchronous motor, which can be directly connected to power frequency supply, accelerates to single-stage high-speed centrifugal blower at full speed.In frequency converter to power frequency
When power supply switches, generally there is 400~500% dash current to generate, network voltage instantaneously declines, and motor is rushed by machinery
It hits.Generation in order to prevent this phenomenon, can between permanent magnet synchronous motor and power frequency supply a starting reactor in parallel, with
Just inhibit the generation of dash current on startup.
The converting operation method of the converting operation device of the utility model, comprising the following steps:
Step 1, start permanent magnet synchronous motor 1, frequency converter 2 and single-stage high-speed centrifugal blower 3；
Step 2, the flow of host computer oxidation wind according to needed for desulphurization system, calculates the reason of single-stage high-speed centrifugal blower 3
By revolving speed；
Step 3, the speed probe on single-stage high-speed centrifugal blower 3 obtains the current rotating speed of single-stage high-speed centrifugal blower 3,
Theoretical rotational speed in host computer combination step 1 obtains adjusting revolving speed required for single-stage high-speed centrifugal blower 3；
Step 4, the controller of frequency converter 2 converts the adjustment signal according to the adjustment signal of the adjustment revolving speed received
After control signal, the inverter of control frequency converter 2 adjusts the voltage of output, frequency, and driving permanent magnet synchronous motor 1 is according to this electricity
Pressure and frequency work, and then change the output revolving speed of single-stage high-speed centrifugal blower 3.
Further, in step 1, when starting frequency converter 2, industrial-frequency alternating current is converted to direct current by the rectifier of frequency converter 2
Direct current after conversion is filtered smoothly by the filter of electricity, frequency converter 2；
In step 4, according to the control signal of controller, inverter is by the DC conversion after filtering at voltage, frequency
Rate meets the alternating current of adjustment revolving speed, drives permanent magnet synchronous motor 1.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of converting operation device of desulfurization single-stage high-speed centrifugal blower characterized by comprising permanent magnet synchronous motor
(1), the single-stage high-speed centrifugal blower (3) that is connected on the permanent magnet synchronous motor (1) and for permanent magnetism described in drive control
The frequency converter (2) of synchronous motor (1), frequency converter (2) input terminal are connected with power frequency supply, frequency converter (2) output end
It is connected with the permanent magnet synchronous motor (1) output shaft；
The frequency converter (2) is located in frequency conversion tank, including rectifier, filter, inverter and controller, the rectifier input
End is connected with power frequency supply, and the rectifier output end is connected with the filter input end, the filter output and institute
It states inverter input terminal to be connected, the inverter output end is connected with the permanent magnet synchronous motor (1) output shaft, the rectification
Device, the filter and the inverter are connected with the controller；
It is provided with speed probe on the single-stage high-speed centrifugal blower (3), the speed probe is connected with the controller；
Wherein, the single-stage high-speed centrifugal blower (3) is strong by calcium sulfite for oxidation air to be delivered in desulfuration absorbing tower
Oxygenerating, the permanent magnet synchronous motor (1) match with the single-stage high-speed centrifugal blower (3).
2. converting operation device according to claim 1, which is characterized in that the single-stage high-speed centrifugal blower (3) and institute
Permanent magnet synchronous motor (1) is stated to be connected by shaft coupling.
3. converting operation device according to claim 1, which is characterized in that the controller includes:
Detection circuit: the smoothed out voltage of the filter filtering, current signal are detected；
Computing circuit: being compared operation with electric current, the voltage signal of detection circuit for the speed signal of the speed probe,
Determine output voltage, the frequency of the inverter；
Driving circuit: the on, off of the switching device of the inverter is driven according to determining output voltage, frequency；
It protects circuit: the inverter and institute is protected when overload or overvoltage occurs according to the output voltage of the inverter
State permanent magnet synchronous motor (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820712336.4U CN208364453U (en) | 2018-05-14 | 2018-05-14 | The converting operation device of desulfurization single-stage high-speed centrifugal blower |
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| CN201820712336.4U CN208364453U (en) | 2018-05-14 | 2018-05-14 | The converting operation device of desulfurization single-stage high-speed centrifugal blower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457890A (en) * | 2018-05-14 | 2018-08-28 | 大唐环境产业集团股份有限公司 | The converting operation device and converting operation method of desulfurization single-stage high-speed centrifugal blower |
-
2018
- 2018-05-14 CN CN201820712336.4U patent/CN208364453U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457890A (en) * | 2018-05-14 | 2018-08-28 | 大唐环境产业集团股份有限公司 | The converting operation device and converting operation method of desulfurization single-stage high-speed centrifugal blower |
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