CN104989669A - Method for reducing power consumption of mill exhauster by matching with duct resistance - Google Patents
Method for reducing power consumption of mill exhauster by matching with duct resistance Download PDFInfo
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Abstract
The invention relates to a method for reducing power consumption of a mill exhauster by matching with duct resistance. The method comprises the following steps: (1) the width of an impeller is changed; and the flow of a working point of a fan is adjusted through changing the width of the impeller; (2) an outlet/inlet angle of a blade is changed; and the total pressure and the efficiency of the fan are adjusted to match with the air volume and the duct resistance after the width adjustment of the impeller; (3) the molded line of the blade is changed; and the inlet/outlet angle and the radius of the arched blade are determined through model tests; and (4) the current collector form is changed; and the arc radius of the throat part of a current collector is adjusted through building the model test. The method solves the problem of high power consumption caused by mismatching between the performance characteristic of the mill exhauster and the duct resistance in the operation, and reduces the power consumption of the exhauster through reducing the airflow short circuit in the inlet of the impeller and the resistance and the frictional force among the blades.
Description
Technical field
The invention belongs to coal-fired plant boiler Powder discharging fan technical field, particularly a kind of method of mating duct resistance minimizing Powder discharging fan power consumption.
Background technique
The boiler accessory machinery of generator set is the main current consuming apparatus of station service, and therefore saving station service is one of energy-saving and cost-reducing main path.Because newly-built and enlarging unit do not mate with the air channel parameter of actual motion in the selection of fan parameter, cause the increase of blower fan power consumption.Need to carry out depth optimization transformation to the structure of blower fan on the basis that Powder discharging fan can meet operation needs.
Summary of the invention
The object of the invention is the problem of not mating duct resistance characteristic for existing fan operation parameter, and propose a kind of method of mating duct resistance minimizing Powder discharging fan power consumption.
The present invention solves its technical problem and takes following technological scheme to realize:
Mate the method that duct resistance reduces Powder discharging fan power consumption, it is as follows that the method comprising the steps of:
(1) change impeller width, be proportional to the ratio of impeller width and impeller diameter according to the theoretical known flow coefficient of centrifugal fan, by changing the width of impeller, the flow of adjustment blower fan operation point;
(2) change the in/out bicker degree of blade, change the in/out bicker of blade, the total head of adjustment blower fan and efficiency, make it with impeller width adjustment after air quantity and duct resistance match;
(3) change the molded line of blade, determine to import and export angle by model test according to above-mentioned steps (2) item, determine the radius of arc shaped blade, carry out the optimal design of vane type line;
(4) changing slip ring form, for ensureing that the rear air-flow of impeller structure parameter transformation enters impeller stably, the radius of arc of slip ring throat being adjusted by Modling model test.
And the concrete grammar that described step (1) changes impeller width is:
1. reduce impeller width 6% ~ 8%, now the fan efficiency range of decrease is less than 1.5%;
2. the method reducing impeller width is that the physical dimension keeping coiling before and after impeller is constant, again makes width of blade.
And the concrete grammar that described step (2) changes the in/out bicker degree of blade is:
1. the method that calculating and model test combine is adopted, change Inlet cone angle 5 different amount, exit angle 6 different amount, model blower press, flow, power is measured every 3 °, computational efficiency, draw total head, power and efficiency curve, analyzes and find out blast and mate the angle value of duct resistance;
2. make angle backup plate in actual enforcement and be fixed welding.
And the concrete grammar that described step (4) changes slip ring form is:
1. the radius of arc model of 6 kinds of slip ring throats is made, the arc diameter of each model with 2% increasing diameter or successively decrease, change the model of different radii, carry out ventilation experiment, by the pressure distribution data of collection model throat, draw each modal pressure distribution map;
2. find out the less model of fluid resistance losses carry out manufacturing or finished product type selecting according to modal pressure distribution map;
3. accounting is re-started to the diameter of slip ring and the relation of flow and pressure, determine to reduce slip ring inlet diameter 4%-6%, ensure that air-flow progressively accelerates after entering slip ring, then form higher wind speed in throat, passage along hyperbolic shape evenly spreads, can have good cooperation with impeller front disc, air flow energy is full of in the runner of whole impeller uniformly.
Advantage of the present invention and good effect are:
1, the invention solves the Powder discharging fan performance characteristics that is in operation not mate with duct resistance and produce the large problem of power consumption, to the centrifugal fan of centrifugal exhaust fan and other model, by on-the-spot test and the blower fan model test of reality, all can be optimized transformation to the structure of existing blower fan, reach the target reducing power consumption, be applicable to each centrifugal each model blower fan.
2, the present invention have found the actual motion characteristic of blower fan and the actual resistance characteristic in air channel by the fan performance test of various working, on this basis, carry out the depth optimization transformation of blower fan structure, ensureing under compressor flow and the substantially constant prerequisite of total head, by reducing the air flow shortcircuit of impeller inlet and interlobate resistance and frictional force, reduce blower fan power consumption.
Accompanying drawing explanation
Fig. 1 is impeller width transformation schematic diagram in the present invention;
fig. 2it is slip ring transformation schematic diagram in the present invention.
Embodiment
Be further described the invention process below in conjunction with accompanying drawing, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
Mate the method that duct resistance reduces Powder discharging fan power consumption, it is as follows that the method comprising the steps of:
(1) impeller width is changed, as shown in Figure 1, the ratio of impeller width and impeller diameter is proportional to according to the theoretical known flow coefficient of centrifugal fan, by changing the width of impeller, the flow of adjustment blower fan operation point, reach under meeting Operational Limits requirement prerequisite, improve the object of fan operation efficiency; Concrete steps comprise:
1. reduce impeller width 6% ~ 8%, now the fan efficiency range of decrease is less than 1.5%;
2. the method reducing impeller width is that the physical dimension keeping coiling before and after impeller is constant, again makes width of blade.
(2) change the in/out bicker degree of blade, change the in/out bicker of blade, the total head of adjustment blower fan and efficiency, make it with impeller width adjustment after air quantity and duct resistance match, concrete grammar is:
1. the method that calculating and model test combine is adopted, change Inlet cone angle 5 different amount, exit angle 6 different amount, model blower press, flow, power is measured every 3 °, computational efficiency, draw total head, power and efficiency curve, analyzes and find out blast and mate the angle value of duct resistance;
2. make angle backup plate in actual enforcement and be fixed welding;
(3) change the molded line of blade, determine to import and export angle by model test according to above-mentioned steps (2) item, determine the radius of arc shaped blade, carry out the optimal design of vane type line;
(4) change slip ring form, as shown in Figure 2, for ensureing that the rear air-flow of impeller structure parameter transformation enters impeller stably, adjusted by Modling model test the radius of arc of slip ring throat, concrete grammar is:
1. the radius of arc model of 6 kinds of slip ring throats is made, the arc diameter of each model with 2% increasing diameter or successively decrease, change the model of different radii, carry out ventilation experiment, by the pressure distribution data of collection model throat, draw each modal pressure distribution map;
2. find out the less model of fluid resistance losses carry out manufacturing or finished product type selecting according to modal pressure distribution map,
3. accounting is re-started to the diameter of slip ring and the relation of flow and pressure, determine to reduce slip ring inlet diameter 4%-6%, ensure that air-flow progressively accelerates after entering slip ring, then form higher wind speed in throat, passage along hyperbolic shape evenly spreads, can have good cooperation with impeller front disc, air flow energy is full of in the runner of whole impeller uniformly.
The inventive method, under the prerequisite changed do not made by former Powder discharging fan casing, axle, motor etc., only reaches by changing the critical datas such as fan impeller blade molded line, in/out bicker degree, slip ring the object improving the performance of blower fan own.Transformation rear fan is exerted oneself and is substantially remained unchanged, and fan operation parameter is basic with original consistent, but due to fan performance be improved significantly and effectively reduce blower fan power consumption, thus effectively reduce blower fan power consumption.
Claims (4)
1. mate the method that duct resistance reduces Powder discharging fan power consumption, it is characterized in that the method comprising the steps of as follows:
(1) impeller width is changed, by changing the width of impeller, the flow of adjustment blower fan operation point;
(2) change the in/out bicker degree of blade, the total head of adjustment blower fan and efficiency, make it with impeller width adjustment after air quantity and duct resistance match;
(3) change the molded line of blade, determine to import and export angle by model test according to above-mentioned steps (2) item, determine the radius of arc shaped blade;
(4) change slip ring form, the radius of arc of slip ring throat is adjusted by Modling model test.
2. coupling duct resistance according to claim 1 reduces the method for Powder discharging fan power consumption, it is characterized in that: the concrete grammar that described step (1) changes impeller width is:
1. reduce impeller width 6% ~ 8%, now the fan efficiency range of decrease is less than 1.5%;
2. the method reducing impeller width is that the physical dimension keeping coiling before and after impeller is constant, again makes width of blade.
3. coupling duct resistance according to claim 1 reduces the method for Powder discharging fan power consumption, it is characterized in that: the concrete grammar that described step (2) changes the in/out bicker degree of blade is:
1. the method that calculating and model test combine is adopted, change Inlet cone angle 5 different amount, exit angle 6 different amount, model blower press, flow, power is measured every 3 °, computational efficiency, draw total head, power and efficiency curve, analyzes and find out blast and mate the angle value of duct resistance;
2. make angle backup plate in actual enforcement and be fixed welding.
4. coupling duct resistance according to claim 1 reduces the method for Powder discharging fan power consumption, it is characterized in that: the concrete grammar that described step (4) changes slip ring form is:
1. the radius of arc model of 6 kinds of slip ring throats is made, the arc diameter of each model with 2% increasing diameter or successively decrease, change the model of different radii, carry out ventilation experiment, by the pressure distribution data of collection model throat, draw each modal pressure distribution map;
2. find out the less model of fluid resistance losses carry out manufacturing or finished product type selecting according to modal pressure distribution map;
3. accounting is re-started to the diameter of slip ring and the relation of flow and pressure, determine to reduce slip ring inlet diameter 4%-6%, ensure that air-flow progressively accelerates after entering slip ring, then form higher wind speed in throat, passage along hyperbolic shape evenly spreads, can have good cooperation with impeller front disc, air flow energy is full of in the runner of whole impeller uniformly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510338501.5A CN104989669B (en) | 2015-06-17 | 2015-06-17 | It is a kind of to match the method that duct resistance reduces Powder discharging fan power consumption |
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| CN201510338501.5A CN104989669B (en) | 2015-06-17 | 2015-06-17 | It is a kind of to match the method that duct resistance reduces Powder discharging fan power consumption |
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| CN104989669B CN104989669B (en) | 2017-08-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952685A (en) * | 2016-06-23 | 2016-09-21 | 常山卫邦风机有限公司 | Efficient centrifugal fan front disc and intake port model capable of being commonly used |
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
| CN109595197A (en) * | 2018-12-07 | 2019-04-09 | 佛山市南海九洲普惠风机有限公司 | A kind of blower |
| CN113221484A (en) * | 2021-06-02 | 2021-08-06 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004124889A (en) * | 2002-10-07 | 2004-04-22 | Kubota Corp | Operating method of air diffuser |
| CN200982653Y (en) * | 2006-11-17 | 2007-11-28 | 长春安信电力科技有限公司 | Mill exhauster |
| CN201827144U (en) * | 2010-08-03 | 2011-05-11 | 沈阳鼓风机研究所(有限公司) | Energy-saving boiler drum induced-draft fan series model |
| CN203321881U (en) * | 2013-06-25 | 2013-12-04 | 济南风机厂有限责任公司 | Efficient and energy-saving fan series model |
-
2015
- 2015-06-17 CN CN201510338501.5A patent/CN104989669B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004124889A (en) * | 2002-10-07 | 2004-04-22 | Kubota Corp | Operating method of air diffuser |
| CN200982653Y (en) * | 2006-11-17 | 2007-11-28 | 长春安信电力科技有限公司 | Mill exhauster |
| CN201827144U (en) * | 2010-08-03 | 2011-05-11 | 沈阳鼓风机研究所(有限公司) | Energy-saving boiler drum induced-draft fan series model |
| CN203321881U (en) * | 2013-06-25 | 2013-12-04 | 济南风机厂有限责任公司 | Efficient and energy-saving fan series model |
Non-Patent Citations (1)
| Title |
|---|
| 邓金峰: "200MW锅炉风机节能改造研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952685A (en) * | 2016-06-23 | 2016-09-21 | 常山卫邦风机有限公司 | Efficient centrifugal fan front disc and intake port model capable of being commonly used |
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN106122091B (en) * | 2016-08-23 | 2017-11-24 | 佛山市南海九洲普惠风机有限公司 | With antecurvature efficient Jing Yin impeller |
| CN108252943A (en) * | 2018-01-08 | 2018-07-06 | 上海理工大学 | Specified centrifugal blower flow and the method for the pressure slope of curve |
| CN109595197A (en) * | 2018-12-07 | 2019-04-09 | 佛山市南海九洲普惠风机有限公司 | A kind of blower |
| CN109595197B (en) * | 2018-12-07 | 2023-10-10 | 佛山市南海九洲普惠风机有限公司 | Fan |
| CN113221484A (en) * | 2021-06-02 | 2021-08-06 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
| CN113221484B (en) * | 2021-06-02 | 2022-11-11 | 上海宝钢节能环保技术有限公司 | Rapid selection method, device and equipment for in-service remanufacturing design scheme of fan |
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| CN104989669B (en) | 2017-08-25 |
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