CN103926093A - Method for simulating additional component resistance through induced draft fan inlet baffle - Google Patents
Method for simulating additional component resistance through induced draft fan inlet baffle Download PDFInfo
- Publication number
- CN103926093A CN103926093A CN201410103475.3A CN201410103475A CN103926093A CN 103926093 A CN103926093 A CN 103926093A CN 201410103475 A CN201410103475 A CN 201410103475A CN 103926093 A CN103926093 A CN 103926093A
- Authority
- CN
- China
- Prior art keywords
- draft fan
- induced draft
- inlet baffle
- resistance
- fan inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses a method for simulating additional component resistance through an induced draft fan inlet baffle. The method comprises the following steps that (1) a plurality of static pressure measurement points are distributed on the cross sections of a front straight pipe section and a rear straight pipe section of the induced draft fan inlet baffle respectively through the grid method; (2) the opening degree of the induced draft fan inlet baffle is gradually reduced, the reducing amplitude does not exceed 5% every minute, the wave range of negative pressure of a furnace of a coal-fired boiler is kept constant from -100 Pa to +100 Pa, and meanwhile the operating parameters of an induced draft fan are comprehensively monitored; (3) before the static pressure difference of the static pressure measurement points on the front straight pipe section and the rear straight pipe section of the induced draft fan inlet baffle exceeds the resistance of a component to be added, if some operating parameters are unqualified, the reduction of the opening degree of the induced draft fan inlet baffle is stopped, and it is determined that the overmeasure of the induced draft fan is not large enough to overcome the resistance of the component to be added, the induced draft fan needs to be replaced synchronously, or capacity expansion of the induced draft fan needs to be transformed; if the operating parameters are qualified, it is determined that overmeasure of the induced draft fan can overcome the resistance of the component to be added, and the induced draft fan does need to be transformed. By means of the method for simulating additional component resistance through the induced draft fan inlet baffle, whether the induced draft fan needs to be transformed or not after a flue gas system is transformed can be accurately judged.
Description
Technical field
The present invention relates to power equipment control field, particularly relate to the newly-increased denitrification apparatus of coal-fired unit or electric precipitation and change into after sack cleaner, flue gas system resistance increases, the assessment technology the field whether allowance of the induced draft fan in flue gas system is enough.
Background technology
The new environmental protection standard " thermal power plant's air pollution emission standard " (GB 13223-2011) of country promulgates, and oxides of nitrogen, the dust of this standard to the smoke stack emission of coal-fired thermal power generation unit requires stricter.Coal-burning power plant need to increase the system that removes (referred to as denitrating system) of oxides of nitrogen or transform the dust arrester in existing flue gas system in original flue gas system.All can cause flue gas system resistance to increase to these two transformations of flue gas system.
Due to each power plant's situation difference, the induced draft fan allowance of some power plant is larger, although increase through the resistance of improved flue gas system, its induced draft fan still can maintain it and normally move; Some power plant, after its flue gas system of transformation, needs to change in the lump its induced draft fan or its induced draft fan is carried out to capacity-increasing transformation, just can maintain the normal operation of whole flue gas system.So being faced with decision-making, power plant whether need to after its flue gas system transformation, transform in the lump the difficult problem of its induced draft fan.
Conventional determination methods is to estimate according to the design parameter of denitrating system or new dust arrester, but this method error is larger, the present invention proposes a kind of method of utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation, and whether the allowance that can assess more exactly rear its induced draft fan of flue gas system transformation is enough.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation, with help coal-burning power plant its after flue gas system transformation, whether the allowance of induced draft fan of assessing its flue gas system is enough, judges whether to need the induced draft fan of synchronous its flue gas system of transformation.
Goal of the invention of the present invention is achieved through the following technical solutions: a kind of method of utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation, comprises the steps:
1) on the xsect of the forward and backward straight length of induced draft fan inlet baffle, arrange respectively several hydrostatic measuring points by gridding method;
The recommended distance that described xsect leaves described induced draft fan inlet baffle is 2 ~ 3 meters.
The quantity of described hydrostatic measuring point is recommended as 4 ~ 6.
2) turn down gradually induced draft fan inlet baffle, per minute reduces amplitude and is no more than 5%, and it is constant at-100 ~+100Pa to maintain the moving scope of coal-burning boiler burner hearth suction wave, the operational factor of comprehensive monitoring induced draft fan simultaneously, comprise: whether monitoring induced draft fan electric current exceedes its rated current, whether induced draft fan vibration exceedes the higher limit of its amplitude, and whether induced draft fan bearing temperature exceedes its temperature upper limit, exceed be judged as defective;
3) differential static pressure of the hydrostatic measuring point on the forward and backward straight length of induced draft fan inlet baffle exceedes before the resistance of the newly-increased parts of plan, if there is operational factor defective, stop turning down induced draft fan inlet baffle, reach a conclusion: the allowance of induced draft fan is not enough to overcome the resistance of the newly-increased parts of plan, need synchronous replacing induced draft fan or induced draft fan is carried out to capacity-increasing transformation; Otherwise, reach a conclusion: the allowance of induced draft fan can overcome the resistance of the newly-increased parts of plan, without transformation induced draft fan.
Whether the present invention has following beneficial effect: adopt the allowance of method assessment induced draft fan of the present invention enough, judge that after flue gas system transformation, whether to need synchronously to transform induced draft fan operating process simple, accuracy is high, is conducive to save the expense of power plant's technological transformation, increases economic efficiency.
Embodiment
Coal burning boiler of power station complex structure, the flue gas of generation will just can enter chimney after the step such as dedusting, desulfurization, so flue gas resistance is larger, need to utilize induced draft fan that flue gas is extracted out, and induced draft fan also causes the needed negative pressure of burner hearth of coal-burning boiler simultaneously.Induced draft fan inlet baffle is arranged on the air inlet of induced draft fan, and for isolation and the maintenance of induced draft fan, also referred to as turn-offing baffle plate, the induced draft fan inlet baffle of indication of the present invention refers to this shutoff baffle plate.It is stator blade controllable register that induced draft fan entrance generally also has another baffle plate, for changing exerting oneself of induced draft fan.
The present invention aims to provide a kind of method of utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation, and it comprises the steps:
1) respectively arrange 4 ~ 6 hydrostatic measuring points by gridding method at the forward and backward straight length of induced draft fan inlet baffle on apart from the xsect at 2 ~ 3 meters of of induced draft fan inlet baffle.The distance that two xsects leave induced draft fan inlet baffle is substantially equal.Hydrostatic measuring point is arranged at 2 ~ 3 meters of of chosen distance induced draft fan inlet baffle, is conducive to make the static pressure that records more accurate, and hydrostatic measuring point distributes by gridding method, is conducive to make the data that record can react more accurately the static pressure mean value in this cross section.
2) turn down gradually induced draft fan inlet baffle, per minute reduces amplitude and is no more than 5%, and it is constant at-100 ~+100Pa to maintain the moving scope of coal-burning boiler burner hearth suction wave, the operational factor of comprehensive monitoring induced draft fan simultaneously, mainly refer to: whether monitoring induced draft fan electric current exceedes its rated current, whether induced draft fan vibration exceedes 125 microns of the higher limits of its amplitude, different manufacturers is slightly different, whether induced draft fan bearing temperature exceedes 75 DEG C of its temperature upper limits, also difference slightly of this numerical value of different manufacturers, exceed be judged as defective.Maintaining the moving scope of coal-burning boiler burner hearth suction wave constant at-100 ~+100Pa is because boiler has some untight positions, outwards jet out flames, and the too low words of pressure can affect economy and security if pressure is crossed conference.The adjustment of combustion chamber draft can realize by the open degree of stator blade controllable register described in adjusting above or the rotating speed of the motor shaft of induced draft fan.
3) differential static pressure of the hydrostatic measuring point on the forward and backward straight length of induced draft fan inlet baffle exceedes before the resistance of the newly-increased parts of plan, if there is operational factor defective, stop turning down induced draft fan inlet baffle, reach a conclusion: the allowance of induced draft fan is not enough to overcome the resistance of the newly-increased parts of plan, need synchronous replacing induced draft fan or induced draft fan is carried out to capacity-increasing transformation; Otherwise, reach a conclusion: the allowance of induced draft fan can overcome the resistance of the newly-increased parts of plan, without transformation induced draft fan.Described differential static pressure is mean value poor of the static pressure of the hydrostatic measuring point on forward and backward straight length.The application adopts microbarograph to measure the static pressure of hydrostatic measuring point.The resistance of newly-increased parts can calculate by existing method.
Claims (3)
1. a method of utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation, is characterized in that, comprises the steps:
1) on the xsect of the forward and backward straight length of induced draft fan inlet baffle, arrange respectively several hydrostatic measuring points by gridding method;
2) turn down gradually induced draft fan inlet baffle, per minute reduces amplitude and is no more than 5%, and it is constant at-100 ~+100Pa to maintain the moving scope of coal-burning boiler burner hearth suction wave, the operational factor of comprehensive monitoring induced draft fan simultaneously, comprise: whether monitoring induced draft fan electric current exceedes its rated current, whether induced draft fan vibration exceedes the higher limit of its amplitude, and whether induced draft fan bearing temperature exceedes its temperature upper limit, exceed be judged as defective;
3) differential static pressure of the hydrostatic measuring point on the forward and backward straight length of induced draft fan inlet baffle exceedes before the resistance of the newly-increased parts of plan, if there is operational factor defective, stop turning down induced draft fan inlet baffle, reach a conclusion: the allowance of induced draft fan is not enough to overcome the resistance of the newly-increased parts of plan, need synchronous replacing induced draft fan or induced draft fan is carried out to capacity-increasing transformation; Otherwise, reach a conclusion: the allowance of induced draft fan can overcome the resistance of the newly-increased parts of plan, without transformation induced draft fan.
2. the method for utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation according to claim 1, is characterized in that, the distance that described xsect leaves described induced draft fan inlet baffle is 2 ~ 3 meters.
3. the method for utilizing the newly-increased parts resistance of induced draft fan inlet baffle simulation according to claim 1, is characterized in that, the quantity of described hydrostatic measuring point is 4 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103475.3A CN103926093B (en) | 2014-03-20 | 2014-03-20 | Method for simulating additional component resistance through induced draft fan inlet baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103475.3A CN103926093B (en) | 2014-03-20 | 2014-03-20 | Method for simulating additional component resistance through induced draft fan inlet baffle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103926093A true CN103926093A (en) | 2014-07-16 |
| CN103926093B CN103926093B (en) | 2017-01-11 |
Family
ID=51144392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410103475.3A Active CN103926093B (en) | 2014-03-20 | 2014-03-20 | Method for simulating additional component resistance through induced draft fan inlet baffle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103926093B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111940A (en) * | 2020-02-13 | 2020-05-08 | 天津水泥工业设计研究院有限公司 | Transformation method for reducing resistance of preheater and preheating system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693956A (en) * | 1992-09-16 | 1994-04-05 | Haruji Kurogo | Method for saving energy generated through utilization of rotation of force draft fan for boiler |
| JPH07286723A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Controlling method for induced draught fan |
| CN102798537A (en) * | 2012-07-30 | 2012-11-28 | 中国能源建设集团广东省电力设计研究院 | Simulative testing device for rain-zone resistance of reverse-flow natural ventilation wet-type cooling tower |
| CN203101082U (en) * | 2013-02-28 | 2013-07-31 | 谢卓祥 | Range hood smoke discharging performance laboratory structure with resistance air outlet |
-
2014
- 2014-03-20 CN CN201410103475.3A patent/CN103926093B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693956A (en) * | 1992-09-16 | 1994-04-05 | Haruji Kurogo | Method for saving energy generated through utilization of rotation of force draft fan for boiler |
| JPH07286723A (en) * | 1994-04-15 | 1995-10-31 | Nippon Steel Corp | Controlling method for induced draught fan |
| CN102798537A (en) * | 2012-07-30 | 2012-11-28 | 中国能源建设集团广东省电力设计研究院 | Simulative testing device for rain-zone resistance of reverse-flow natural ventilation wet-type cooling tower |
| CN203101082U (en) * | 2013-02-28 | 2013-07-31 | 谢卓祥 | Range hood smoke discharging performance laboratory structure with resistance air outlet |
Non-Patent Citations (2)
| Title |
|---|
| 孔令君 等: "引风机节能改造及性能试验研究", 《华电技术》 * |
| 杨俊波 等: "引风机前烟道阻力特性分析", 《电站系统工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111940A (en) * | 2020-02-13 | 2020-05-08 | 天津水泥工业设计研究院有限公司 | Transformation method for reducing resistance of preheater and preheating system |
| CN111111940B (en) * | 2020-02-13 | 2024-04-30 | 天津水泥工业设计研究院有限公司 | Transformation method for reducing resistance of preheater and preheating system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103926093B (en) | 2017-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Strömberg et al. | Update on Vattenfall’s 30 MWth oxyfuel pilot plant in Schwarze Pumpe | |
| CN103148473B (en) | Optimal operation method and system for utility boiler based on CO | |
| CN112283689B (en) | On-line monitoring system and detection method for accumulated ash on heating surface of coal-fired power plant boiler | |
| CN103375997B (en) | Method for regulating and controlling circulating flue-gas temperature and oxygen content | |
| CN104801416A (en) | Control system and control method for outlet temperature of novel coal mill | |
| CN107543199A (en) | A kind of pulverized-coal fired boiler online detection of primary air and burning optimization management system | |
| CN101806626A (en) | Online monitoring method for flue gas temperature of hearth outlet of power station boiler | |
| CN103017196A (en) | Air distribution optimized automatic control system and control method thereof of boiler | |
| CN106441962A (en) | Method for real-time monitoring of performance of fan of boiler in power station | |
| CN105605609A (en) | Thermal power plant boiler combustion oxygen amount optimizing method | |
| CN103323273A (en) | Method for detecting performance of power station boiler air pre-heater | |
| CN104456538A (en) | Device and method for retarding high-temperature corrosion on rotational flow opposed combustion boiler water wall | |
| CN108197723B (en) | Optimized energy-saving scheduling method for coal consumption and pollutant discharge of coal-electricity unit power supply | |
| CN206479514U (en) | A kind of boiler combustion data collecting system | |
| CN108889452B (en) | Type selection method of electrostatic precipitator for deep cooling of flue gas | |
| CN108490219B (en) | Device and method for correcting flow velocity calculation of matrix speed measuring equipment | |
| CN103926093B (en) | Method for simulating additional component resistance through induced draft fan inlet baffle | |
| CN103256825B (en) | Method for monitoring cement production soot emission and waste heat power generation system soot emission | |
| CN106501452A (en) | Integrated flue gas discharge hot test device with the burner of power curve test | |
| CN106123026A (en) | A kind of thermal power plant coal powder pipeline blocking method for early warning | |
| CN103185610B (en) | Dust removing system pipe network resistance balance evaluation and debugging method | |
| CN214198729U (en) | Large-scale power plant boiler draught fan air volume adjusting device | |
| CN113449995B (en) | Method for evaluating comprehensive energy consumption of thermal power plant | |
| CN113449954B (en) | Method for measuring and calculating bottom air leakage rate of dry slag-discharging boiler | |
| CN106768716B (en) | A method of reducing Ore Sintering Process air leak rate of air curtain |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510080 water Donggang 8, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 water Donggang 8, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |