WO2012129749A1 - 变速或定速风机风量计算系统 - Google Patents
变速或定速风机风量计算系统 Download PDFInfo
- Publication number
- WO2012129749A1 WO2012129749A1 PCT/CN2011/001923 CN2011001923W WO2012129749A1 WO 2012129749 A1 WO2012129749 A1 WO 2012129749A1 CN 2011001923 W CN2011001923 W CN 2011001923W WO 2012129749 A1 WO2012129749 A1 WO 2012129749A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fan
- air volume
- transmitter
- control system
- pressure transmitter
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/363—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction with electrical or electro-mechanical indication
Definitions
- the utility model relates to a variable speed or constant speed fan air volume calculation system in a large boiler fan device of a thermal power plant, belonging to the field of mechatronics.
- the air volume measuring devices are installed in the inlet or outlet ducts, and the main forms thereof are (1) airfoil type air volume measuring device; (2) Venturi air volume measuring (3) Bar series air volume measuring device; (4) Average speed air volume measuring device; (5) Hot wire air volume measuring device. Most of these measuring devices use the method of measuring differential pressure or thermoelectric potential, and then converted into air volume signals by the air volume transmitter.
- the present invention provides a variable speed or constant speed fan air volume calculation system, which aims to solve the complexity of the previous measurement system, low measurement accuracy, low reliability, increased air volume resistance loss and wind turbine operating conditions. Problems such as visual surveillance cannot be achieved.
- a variable speed or constant speed fan air volume calculation system characterized in that: the system comprises a central processing control system, a superior processing system, a wind motor blade angle indicating transmitter , fan inlet pressure transmitter, fan inlet air temperature transmitter, fan outlet pressure transmitter, fan motor current transformer and fan DCS control system; the signal input end of the central processing control system and the fan blade angle indication The transmitter, the fan inlet pressure transmitter, the fan inlet air temperature transmitter, the fan outlet pressure transmitter and the fan motor current transformer are connected; the signal output end of the central processing control system is connected to the fan DCS control system.
- the central processing control system is a PLC programmable controller or a single chip microcomputer.
- the upper processing system is the upper computer or the fan DCS control system.
- the wind motor blade angle indicating transmitter and the fan motor current transformer are set in the fan; the fan inlet pressure transmitter and the fan inlet air temperature transmitter are set at the inlet of the fan; the fan outlet pressure transmitter is set at the fan outlet At the office.
- the utility model provides a variable speed or constant speed fan air volume calculation system, which comprises a central processing control system, a host processing system, a wind motor blade corner indicating transmitter, a fan inlet pressure transmitter, and a fan inlet air temperature transmitter. , fan outlet pressure transmitter, fan motor current transformer and fan DCS control system; the signal input end of the central processing control system and the fan blade angle indicating transmitter, fan inlet pressure transmitter, fan inlet air temperature change The transmitter, the fan outlet pressure transmitter and the fan motor current transformer are connected; the signal output end of the central processing control system is connected to the fan DCS control system.
- a. Simplifies the original measurement method of the system, improves the accuracy and reliability of the measurement signal; b. Eliminates the original air volume measurement device and the air volume transmission and other facilities, reducing the cost of processing, installation and maintenance (the device The cost is much less than the original equipment cost);
- the air volume measurement method cancels the measurement accessories installed in the air duct of the original air volume measuring device, reduces the resistance loss of the air duct system, improves the economic efficiency of the fan, and has certain practicality for the energy conservation and emission reduction advocated by the National Development and Reform Commission. Meaning
- the device can be widely produced as a product with considerable benefits.
- FIG. 1 is a schematic structural view of an air volume measuring system used in the background art
- Figure 2 is a schematic view of the main structure of the present invention.
- Fig. 3 is a graph showing the online monitoring of the working condition of the fan of the utility model.
- the serial numbers indicated are: fan suction port 1; fan air volume measurement accessory 2; rotor blade angle indicating transmitter 3; fan 4; fan outlet motor door 5; air preheater inlet door 6; Preheater 7; air preheater outlet door 8; boiler 9; differential pressure transmitter 10; fan DCS control system 11; PLC programmable controller 12; upper computer 13; fan inlet pressure transmitter 14; Wind temperature transmitter 15; fan outlet pressure transmitter 16; fan motor current transformer 17.
- the fan air volume measuring accessory 2 is installed in the fan inlet or outlet duct to measure the air volume of the fan, so as to realize the control air volume control of the boiler.
- the air volume is drawn in from the fan suction port 1 and then powered by the fan 4, and most of the air is heated by the air preheater 7 and sent to the boiler 9.
- the air volume signal provided by the fan is measured by the fan air volume measuring accessory 2 installed in the fan inlet or outlet air duct, and then the differential pressure transmitter 10 sends the differential pressure signal to the fan DCS control system to convert into air volume. signal.
- the main technical solution of the utility model is to omit the measurement system using the air volume device in the past, which not only simplifies the system, reduces the manufacturing, processing, installation and maintenance costs, but also reduces the resistance loss of the air supply system and improves the control. Signal accuracy, reliability and economy.
- the utility model comprises a central processing control system, a host processing system, a wind motor blade angle indicating transmitter 3, a fan inlet pressure transmitter 14, a fan inlet air temperature transmitter 15, and a fan outlet pressure change.
- the transmitter 16, the fan motor current transformer 17 and the fan DCS control system 11; the signal input end of the central processing control system and the fan blade angle indicating transmitter 3, the fan inlet pressure transmitter 14, the fan inlet air temperature change The feeder 15, the fan outlet pressure transmitter 16 and the fan motor current transformer 17 are connected, and the data is calculated and processed in the program already stored in the upper computer, and is drawn into a characteristic curve to visually reflect in the upper computer.
- the signal output of the central processing control system is coupled to the fan DCS control system 11.
- the central processing control system can choose PLC Programmable controller 12 or microcontroller.
- the upper processing system can select the upper computer 13 or the fan DCS control system.
- the so-called upper computer refers to a computer that can directly issue control commands.
- the screen displays various acquisition signal changes and air volume calculation results in real time, and can also recall historical data.
- the fan inlet pressure transmitter 14 and the fan inlet air temperature transmitter 15 are placed at the inlet of the fan; the fan outlet pressure transmitter 16 is placed at the fan outlet.
- the PLC programmable controller 12 is a computing platform composed of a single board machine and a part of hardware. It can transmit analog or switching quantities to the signal through the input interface. After logical judgment and calculation, the PLC can output the output in the form of analog quantity.
- the interface is passed to the fan DCS control system 11.
- the host computer has two functions, one is to compile and transfer the program, that is, to compile the fan air volume calculation program, and to transfer the programmed program to the PLC programmable controller; the other is to run the online monitoring, that is, to use the CRT display screen. Equipment operating condition display, accident alarm list display, historical parameter query display, etc.
- the utility model is as follows:
- the upper computer 13 can display the operating conditions of the fan in real time online;
- Collecting input signal When the input signal of the utility model is used, the fan inlet pressure, the fan outlet pressure, the wind motor blade corner angle, the fan inlet air temperature and the fan motor current are all used in the signal source of the original system.
- the parameters such as the fan inlet pressure, the fan outlet pressure, the wind motor blade angle, the fan inlet air temperature and the fan motor current are set.
- Alarm protection when the parameter is not credible, the introduction of the parameter abnormal alarm signal, prompting the operation personnel to find the processing as soon as possible to ensure the accuracy of the fan air volume calculation.
- Real-time monitoring Open the variable speed or constant speed fan characteristic curve screen, there is a movable flash point to directly display the fan operating conditions (see Figure 3). When the air volume exceeds the design boundary area, the operating personnel will be able to see at a glance and take it in time.
- Countermeasures Adjust the fan operating conditions within the design area or in the high efficiency area.
- the utility model replaces the original air volume measuring method with a device for calculating the air volume method.
- the advantages are: reducing the installation complexity of the air volume measuring device; reducing the resistance loss caused by the air volume measuring device; reducing the air volume measurement error; increasing the safe operation reliability and increasing the air volume characteristic online monitoring function.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2011363926A AU2011363926A1 (en) | 2011-03-29 | 2011-11-18 | Air volume calculation system for variable speed or constant speed fan |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201120086923.5 | 2011-03-29 | ||
CN 201120086923 CN202013212U (zh) | 2011-03-29 | 2011-03-29 | 变速或定速风机风量计算系统 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012129749A1 true WO2012129749A1 (zh) | 2012-10-04 |
WO2012129749A8 WO2012129749A8 (zh) | 2013-01-17 |
Family
ID=44783829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2011/001923 WO2012129749A1 (zh) | 2011-03-29 | 2011-11-18 | 变速或定速风机风量计算系统 |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN202013212U (zh) |
AU (2) | AU2011101740A6 (zh) |
WO (1) | WO2012129749A1 (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202013212U (zh) * | 2011-03-29 | 2011-10-19 | 东北电力科学研究院有限公司 | 变速或定速风机风量计算系统 |
CN103032360B (zh) * | 2012-12-27 | 2015-04-08 | 中冶长天国际工程有限责任公司 | 一种脱硫系统的控制方法及装置 |
KR101815408B1 (ko) * | 2014-07-23 | 2018-01-30 | 종샨 브로드-오션 모터 컴퍼니 리미티드 | 팬 모터의 풍량 측정 방법 |
CN105441609B (zh) * | 2014-09-30 | 2017-09-12 | 上海梅山钢铁股份有限公司 | 一种鼓风机风量控制方法 |
CN105928568A (zh) * | 2016-04-14 | 2016-09-07 | 长安益阳发电有限公司 | 一种新型风机风量测量方法及系统 |
CN107044435A (zh) * | 2016-05-13 | 2017-08-15 | 周卫华 | 定风量智能控制离心式通风机 |
CN108318096A (zh) * | 2018-03-29 | 2018-07-24 | 上海市建筑科学研究院 | 一种适用于风量罩的动力型背压补偿装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070202795A1 (en) * | 2006-02-24 | 2007-08-30 | Greenheck Fan Corporation | Induced flow fan with outlet flow measurement |
CN201081741Y (zh) * | 2007-09-07 | 2008-07-02 | 湖南科技大学 | 数字式矿用轴流风机风量测量装置 |
CN202013212U (zh) * | 2011-03-29 | 2011-10-19 | 东北电力科学研究院有限公司 | 变速或定速风机风量计算系统 |
-
2011
- 2011-03-29 CN CN 201120086923 patent/CN202013212U/zh not_active Expired - Lifetime
- 2011-11-18 AU AU2011101740A patent/AU2011101740A6/en not_active Expired
- 2011-11-18 AU AU2011363926A patent/AU2011363926A1/en active Pending
- 2011-11-18 WO PCT/CN2011/001923 patent/WO2012129749A1/zh active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070202795A1 (en) * | 2006-02-24 | 2007-08-30 | Greenheck Fan Corporation | Induced flow fan with outlet flow measurement |
CN201081741Y (zh) * | 2007-09-07 | 2008-07-02 | 湖南科技大学 | 数字式矿用轴流风机风量测量装置 |
CN202013212U (zh) * | 2011-03-29 | 2011-10-19 | 东北电力科学研究院有限公司 | 变速或定速风机风量计算系统 |
Non-Patent Citations (2)
Title |
---|
CHEN SHIWEI ET AL.: "Application of Single Chip Microcomputer in Periodic Measuring of Fan Performance.", COAL MINE AUTOMATION., no. 1, 2000, pages 25 * |
IANG XIFENG ET AL.: "Measuring Method Investigation on Cooling Fan Flow Rate of the Traction Motor of the High Speed Train.", FLUID MACHINERY., vol. 31, no. 2, 2003, pages 6 * |
Also Published As
Publication number | Publication date |
---|---|
AU2011101740A6 (en) | 2015-03-05 |
CN202013212U (zh) | 2011-10-19 |
AU2011101740A4 (en) | 2014-05-29 |
WO2012129749A8 (zh) | 2013-01-17 |
AU2011363926A1 (en) | 2013-10-31 |
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