CN208364388U - A kind of desulfurization roots blower speed regulation device - Google Patents
A kind of desulfurization roots blower speed regulation device Download PDFInfo
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- CN208364388U CN208364388U CN201820713761.5U CN201820713761U CN208364388U CN 208364388 U CN208364388 U CN 208364388U CN 201820713761 U CN201820713761 U CN 201820713761U CN 208364388 U CN208364388 U CN 208364388U
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Abstract
The utility model relates to a kind of desulfurization roots blower speed regulation devices, including the permanent magnet coupling speed regulator being connected between permanent-magnet synchronous variable-frequency motor and roots blower, it include: the copper conductor rotor being fixed on permanent-magnet synchronous variable-frequency motor output shaft, the PM rotor being fixed on roots blower input shaft, for adjusting the regulating mechanism of air gap thickness or engagement area between copper conductor rotor and PM rotor, and the speed-regulating driver for driving regulating mechanism；Roots blower is equipped with speed probe, and speed-regulating driver input terminal is connect with speed probe and host computer, and speed-regulating driver output end connect driving regulating mechanism movement with regulating mechanism.The utility model has the following beneficial effects: increased auxiliary facility is few, it is not necessary that original desulphurization system is largely transformed, cost of investment is small, can be realized the biggish energy-saving effect of blower, avoids the running energy waste of desulphurization system.
Description
Technical field
The utility model relates to a kind of desulfurization roots blower speed regulation devices.
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 is broadly divided into roots blower, Multi-stage centrifugal fan and single-stage high-speed centrifugal blower three
Kind form, wherein the method for operation and control mode of Multi-stage centrifugal fan and single-stage high-speed centrifugal blower are substantially the same, Roots
The operation of blower and centrifugal blower is not identical.Roots blower belongs to positive displacement gas compressor, the air quantity and revolution of conveying at
Ratio.Its working principle is that: by two impellers (or three leaves), opposite direction at the uniform velocity rotates each other in cabinet, makes cabinet and impeller institute
A certain amount of gas surrounded is transported to the side of discharge by the side sucked.Roots blower is mainly characterized by: 1) leaf
Wheel and axis are overall structure, and impeller, without abrasion, fan performance is sustained, can continuously run for a long time；2) there is hard exhaust
Characteristic, when pressure change, changes in flow rate very little, within the scope of design pressure, its changes in flow rate very little when resistance of pipe system changes is fitted
The biggish workplace of resistance amplitude of variation for stable in traffic requirement；3) since Roots blower is deposited during the work time
In surging, cause Roots blower noise higher, strong influence can be brought to ambient enviroment.
Desulfurization at present is stationary state operation with roots blower, and scene will not be with unit load and the practical feelings at scene
Condition is adjusted correspondingly operation, and the method for operation is in unit compared with large load operation or desulphurization system inlet flue gas parameter and design
Operating condition is suitable when matching, and easily occurs biggish energy waste in actual motion.In order to guarantee desulphurization system safety, economy
Operation, desulfurization roots blower are adjusted with the operating load of unit, the variation needs of Gas Parameters.The prior art is in oxygen
Change blower to reuse when being transformed, increase frequency converter, can be realized economize on electricity 30% or so, although power savings are obvious, need to increase
Transducer Room and its auxiliary facility, reforming content is relatively more, invests also relatively large.Meanwhile existing oxidation fan institute distribution
Machine is asynchronous motor, although its is stable, failure rate is low, and from the point of view of Energy Angle, asynchronous motor can not embody
Energy-saving effect.
Utility model content
Aiming at the shortcomings existing in the above problems, the utility model provides a kind of desulfurization roots blower speed regulation dress
It sets, preferable energy-saving effect can be realized without increasing frequency conversion room.
To achieve the above object, the utility model provides a kind of desulfurization roots blower speed regulation device, including is connected to forever
Permanent magnet coupling speed regulator between magnetic-synchro variable-frequency motor and roots blower, the permanent magnet coupling speed regulator include: to be fixed on institute
State the copper conductor rotor on permanent-magnet synchronous variable-frequency motor output shaft, the permanent magnet being fixed on the roots blower input shaft turns
Son, for adjusting the regulating mechanism of air gap thickness or engagement area between the copper conductor rotor and the PM rotor,
And the speed-regulating driver for driving the regulating mechanism；
Be provided with speed probe on the roots blower, the speed-regulating driver input terminal and the speed probe and
Host computer connection, the speed-regulating driver output end connect the driving regulating mechanism movement with the regulating mechanism；
Wherein, the roots blower is used to for oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite,
The permanent-magnet synchronous variable-frequency motor is matched with the roots blower.
As further improvement of the invention, the copper conductor rotor and the PM rotor are disc rotor.
As further improvement of the invention, the regulating mechanism is for adjusting the copper conductor rotor and the permanent magnet
Air gap thickness between rotor.
As further improvement of the invention, the copper conductor rotor and the PM rotor are cylindrical rotor.
As further improvement of the invention, the regulating mechanism is for adjusting the copper conductor rotor and the permanent magnet
Engagement area between rotor.
The utility model has the following beneficial effects:
1, roots blower can be realized 0~25% energy conservation, even more；
2, the starting of roots blower can gradually be run, and avoided starting and stopping suddenly for scene, can preferably be protected
Equipment increases the service life of equipment and its components, reduces site examining and repairing maintenance and maintenance cost；
3, permanent magnet coupling speed regulator reduces subsequent operation and maintenance cost without other accessories for machine components；
4, the operation conditions for the blower that scene can be adjusted according to the practical operation situation of unit, reduces the waste of equipment,
Reduce the operating cost at scene.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of desulfurization roots blower speed regulation device of the utility model.
In figure:
1, permanent-magnet synchronous variable-frequency motor；2, permanent magnet coupling speed regulator；3, roots blower.
Specific embodiment
As shown in Figure 1, a kind of desulfurization roots blower speed regulation device, feature described in the utility model embodiment exist
In including the permanent magnet coupling speed regulator 2 being connected between permanent-magnet synchronous variable-frequency motor 1 and roots blower 3, permanent magnet coupling speed regulator
2 include: the copper conductor rotor being fixed on 1 output shaft of permanent-magnet synchronous variable-frequency motor, be fixed on 3 input shaft of roots blower forever
Magnet rotor, for adjusting the regulating mechanism of air gap thickness or engagement area between copper conductor rotor and PM rotor, with
And the speed-regulating driver for driving regulating mechanism；
Speed probe is provided on roots blower 3, speed-regulating driver input terminal is connect with speed probe and host computer,
Speed-regulating driver output end connect driving regulating mechanism movement with regulating mechanism；
Roots blower 3 is used to for oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite, permanent-magnet synchronous
Variable-frequency motor 1 is matched with roots blower 3.
Matching used asynchronous machine is replaced with permanent-magnet synchronous variable-frequency motor by the present invention, is had 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.
Roots blower belongs to constant volume type rotary blower, is equivalent to constant-current source, and rotor is under certain revolving speed, when pressure rises
Change where applicable in the coverage of permission, flow almost stablize it is constant, according to the characteristic calculating formula of the flow of roots blower:
In formula, D is root diameter (m), and l is rotor length (m), and n is rotor speed (r/min), λvFor bulk coefficient, λv
=0.55~0.9.
As can be seen from the above equation, change the i.e. changeable flow of speed for the rotor connecting with roots blower.
After roots blower revolving speed changes, shaft power is just corresponding to be changed, and is calculated with following formula:
In formula, Δ P is roots blower inlet outlet pressure differential, ηv、ηmFor volumetric efficiency, machinery driving efficiency.
As can be seen from the above equation, the performance characteristics of roots blower are that the relationship of direct ratio, revolving speed are kept between revolving speed and flow
It is also proportional with power, selection best operating point may be implemented by changing revolving speed.Changing roots blower revolving speed can be real
The target for now selecting best operating point, rationally controls actual air volume, that is, uninterrupted, according to roots blower revolving speed and power at just
The revolving speed of the relationship of ratio, roots blower reduces, and roots blower needs the electrical power consumed also to decline, to realize roots blower
It is energy-saving.
Desk permanent-magnet coupled speed regulator and tubular permanent magnet coupling speed regulator can be used in permanent magnet coupling speed regulator 2 of the invention.
When using desk permanent-magnet coupled speed regulator, copper conductor rotor and PM rotor are disc rotor, at this point, adjusting
Section mechanism is used to adjust the air gap thickness between copper conductor rotor and PM rotor, adjusts copper by the variation of air gap thickness
Transmitting torque between conductor rotor and PM rotor, to complete the adjusting of 3 revolving speed of roots blower.
When using tubular permanent magnet coupling speed regulator, copper conductor rotor and PM rotor are cylindrical rotor, at this point, adjusting
Mechanism is used to adjust the engagement area between copper conductor rotor and PM rotor, is led by the variation of engagement area to adjust copper
Transmitting torque between body rotor and PM rotor, to complete the adjusting of 3 revolving speed of roots blower.
Using the above-mentioned desulfurization speed regulating method of roots blower speed regulation device, comprising the following steps:
Step 1, the flow of host computer oxidation wind according to needed for desulphurization system, calculates the theoretical rotational speed of roots blower 3；
Step 2, the speed probe on roots blower 3 obtains the current rotating speed of roots blower 3, host computer combination step 1
In theoretical rotational speed, obtain adjusting revolving speed required for roots blower 3；
Step 3, which is converted into electric current according to the adjustment signal of the adjustment revolving speed received by speed-regulating driver
Regulating mechanism movement is driven after signal, regulating mechanism adjusts the copper conductor being fixed on 1 output shaft of permanent-magnet synchronous variable-frequency motor and turns
Air gap thickness or engagement area between son and the PM rotor being fixed on 3 input shaft of roots blower change copper conductor and turn
Transmitting torque between son and PM rotor, to change the output revolving speed of roots blower.
When using desk permanent-magnet coupled speed regulator, copper conductor rotor and PM rotor are disc rotor, at this point,
Regulating mechanism is used to adjust the air gap thickness between copper conductor rotor and PM rotor, is adjusted by the variation of air gap thickness
Transmitting torque between copper conductor rotor and PM rotor, to complete the adjusting of 3 revolving speed of roots blower.It is specific in step 3
Regulative mode are as follows: when adjusting revolving speed is to reduce revolving speed, speed-regulating driver drives regulating mechanism to increase copper conductor rotor and forever
Air gap thickness between magnet rotor, far from PM rotor, the magnetic line of force quantity across copper conductor rotor subtracts copper conductor rotor
Small, induced magnetic field becomes smaller, at this point, the transmitting torque between copper conductor rotor and PM rotor becomes smaller, the output of roots blower
Revolving speed becomes smaller；When adjusting revolving speed is to increase revolving speed, speed-regulating driver drives regulating mechanism to reduce copper conductor rotor and permanent magnet
Air gap thickness between rotor, copper conductor rotor is closer apart from PM rotor, and the magnetic line of force quantity across copper conductor rotor increases
Adding, induced magnetic field becomes larger, at this point, the transmitting torque between copper conductor rotor and PM rotor becomes larger, the output of roots blower
Revolving speed becomes larger.
When using tubular permanent magnet coupling speed regulator, copper conductor rotor and PM rotor are cylindrical rotor, at this point, adjusting
Section mechanism is used to adjust the engagement area between copper conductor rotor and PM rotor, adjusts copper by the variation of engagement area
Transmitting torque between conductor rotor and PM rotor, to complete the adjusting of 3 revolving speed of roots blower.It is specific in step 3
Regulative mode are as follows: when adjusting revolving speed is to reduce revolving speed, speed-regulating driver drives regulating mechanism to reduce copper conductor rotor and permanent magnetism
Engagement area between body rotor, the magnetic line of force quantity for acting on copper conductor rotor reduce, and induced magnetic field becomes smaller, at this point, copper is led
Transmitting torque between body rotor and PM rotor becomes smaller, and the output revolving speed of roots blower becomes smaller；When adjustment revolving speed is to increase
When revolving speed, speed-regulating driver drives regulating mechanism to increase the engagement area between copper conductor rotor and PM rotor, acts on
The magnetic line of force quantity of copper conductor rotor increases, and induced magnetic field becomes larger, at this point, the transmitting between copper conductor rotor and PM rotor
Torque becomes larger, and the output revolving speed of roots blower becomes larger.
After desulfurization of the invention roots blower speed regulation device, desulphurization system and the energy-saving situation table of oxidation fan
It is as follows:
The permanent-magnet synchronous variable-frequency motor from the results, it was seen that the roots blower of the utility model desulfurization is arranged in pairs or groups, it is increased
Auxiliary facility is few, and it is not necessary that original desulphurization system is largely transformed, cost of investment is small, and uses permanent magnet coupling speed regulator tune
Speed can be realized the biggish energy-saving effect of blower, avoid the running energy waste of desulphurization system.
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 (1)
1. a kind of desulfurization roots blower speed regulation device, which is characterized in that including being connected to permanent-magnet synchronous variable-frequency motor (1) and sieve
Permanent magnet coupling speed regulator (2) between thatch blower (3), the permanent magnet coupling speed regulator (2) includes: to be fixed on the permanent-magnet synchronous
Copper conductor rotor on variable-frequency motor output shaft, the PM rotor being fixed on the roots blower input shaft, for adjusting
The regulating mechanism of air gap thickness between the copper conductor rotor and the PM rotor, and for driving the regulating mechanism
Speed-regulating driver；Wherein, the copper conductor rotor and the PM rotor are disc rotor；
Be provided with speed probe on the roots blower (3), the speed-regulating driver input terminal and the speed probe and
Host computer connection, the speed-regulating driver output end connect the driving regulating mechanism movement with the regulating mechanism；
Wherein, the roots blower (3) is used to for oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite, institute
Permanent-magnet synchronous variable-frequency motor (1) is stated to match with the roots blower (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713761.5U CN208364388U (en) | 2018-05-14 | 2018-05-14 | A kind of desulfurization roots blower speed regulation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713761.5U CN208364388U (en) | 2018-05-14 | 2018-05-14 | A kind of desulfurization roots blower speed regulation device |
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| CN208364388U true CN208364388U (en) | 2019-01-11 |
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| CN201820713761.5U Active CN208364388U (en) | 2018-05-14 | 2018-05-14 | A kind of desulfurization roots blower speed regulation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443153A (en) * | 2018-05-14 | 2018-08-24 | 大唐环境产业集团股份有限公司 | A kind of desulfurization roots blower speed regulation device and speed regulating method |
| CN111408260A (en) * | 2020-04-15 | 2020-07-14 | 大唐环境产业集团股份有限公司 | Operation system for canceling speed reducer of slurry circulating pump |
| CN111536060A (en) * | 2020-01-10 | 2020-08-14 | 爱景节能科技（上海）有限公司 | Permanent magnet coupling adjustment high-pressure air compressor |
-
2018
- 2018-05-14 CN CN201820713761.5U patent/CN208364388U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443153A (en) * | 2018-05-14 | 2018-08-24 | 大唐环境产业集团股份有限公司 | A kind of desulfurization roots blower speed regulation device and speed regulating method |
| CN111536060A (en) * | 2020-01-10 | 2020-08-14 | 爱景节能科技（上海）有限公司 | Permanent magnet coupling adjustment high-pressure air compressor |
| CN111408260A (en) * | 2020-04-15 | 2020-07-14 | 大唐环境产业集团股份有限公司 | Operation system for canceling speed reducer of slurry circulating pump |
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