CN104265666A - Method for preventing surging of fans - Google Patents
Method for preventing surging of fans Download PDFInfo
- Publication number
- CN104265666A CN104265666A CN201410432619.XA CN201410432619A CN104265666A CN 104265666 A CN104265666 A CN 104265666A CN 201410432619 A CN201410432619 A CN 201410432619A CN 104265666 A CN104265666 A CN 104265666A
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- combustion fan
- combustion
- pressure
- fan
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002485 combustion reaction Methods 0.000 claims abstract description 138
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 24
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 9
- 230000002035 prolonged effect Effects 0.000 abstract 1
- GHOKWGTUZJEAQD-ZETCQYMHSA-N (D)-(+)-Pantothenic acid Chemical compound OCC(C)(C)[C@@H](O)C(=O)NCCC(O)=O GHOKWGTUZJEAQD-ZETCQYMHSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0253—Surge control by throttling
Abstract
The invention discloses a method for preventing surging of fans. The method for preventing surging of the fans comprises the following steps of arranging an outlet adjusting valve and a pressure detecting device on an outlet of each combustion fan; acquiring starting signals of each combustion fan, furnace inside combustion marks, running current detection signals, outlet pressure detection signals and opening feedback signals of the outlet adjusting valves; acquiring pressure detection signals of an air main tube; and transmitting the signals to a computer control system and calculating and analyzing the signals. When the current value of the combustion fans are lower than a normal working current range, the adjusting valves on the outlets of the combustion fans are adjusted according to the current value, the opening of the valves is adjusted, air supply load is increased, and the pressure of the outlets of the combustion fans is greater than or equal to the pressure on the air main tube. By the method, surging of the fans can be effectively avoided, so that the fans are protected, and the service lives of the fans are prolonged.
Description
Technical field
The present invention relates to a kind of for preventing the controlling method of blower fan surge, belonging to technical field of steel production.
Background technique
Silicon steel high-temperature ring annealing furnace is configured with two frequency conversion combustion fans.If blower fan in use surge occurs, blower fan there will be periodic air-out and refluence, can have a strong impact on the working life of blower fan like this.
Blower fan occurs that surging phenomenon mainly occurs in following two kinds of operating modes: 1, in normal productive process, a combustion fan is in running order, and an other combustion fan is in stand-by state.When being switched to combustion fan for subsequent use by work combustion fan, if control system detects that combustion fan for subsequent use starts, work combustion fan will stop.But often combustion fan for subsequent use just starts, and air door is not opened completely, inrush current is in the process of changing from small to big, and outlet pressure diminishes suddenly, and actual pipeline pressure is very large, at this moment just result in the surge of blower fan.2, when silicon steel high-temperature ring annealing furnace by normal combustion (be and meet the temperature of technological requirement and the burning of control combustion medium) state to minimum burning (i.e. silicon steel high-temperature ring annealing furnace T at set intervals, when rotating, siege moves, air cock is opened, combustion medium is controlled in minimum zone) state switch time, all is door opened, heat load drops to suddenly minimum, and the air door of combustion fan is transferred to smaller aperture according to minimum combustion load amount correspondence.At this moment because outlet pressure diminishes suddenly, and pipeline pressure is still very large, causes blower fan surge.
In the past, the surge of silicon steel high-temperature ring annealing furnace combustion fan controlled to be complete by Fan Equipment producer is complete, not in conjunction with actual conditions, did not reach control effects.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of for preventing the method for blower fan surge, to solve in silicon steel high-temperature ring annealing furnace normal productive process, when two combustion fans switch, or there is the technical problem of combustion fan surge when forwarding minimum combustion regime to by normal combustion in stove.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises the steps:
1) each increase outlet regulating valve and a pressure-detecting device is exported at every platform combustion fan;
2) actuating signal and the stove combustion mark of every platform combustion fan is gathered;
3) current detection signal of every platform combustion fan running is gathered;
4) the outlet pressure testing signal of every platform combustion fan is gathered;
5) air header pressure detecting signal is gathered;
6) the open degree feedback signal of every platform combustion fan outlet regulating valve is gathered;
7) testing signal will gathered, delivers to computer controlled system;
8) computer controlled system feeds back the result obtained according to testing signal, makes the following judgment:
8.1) when detecting that two combustion fans start, illustrate and just switched to combustion fan for subsequent use by work combustion fan, now: if the combustion fan outlet pressure for subsequent use started lower than air header pressure 70% time, then according to this combustion fan outlet regulating valve of size adjustment of the current value I of the combustion fan for subsequent use started, by constantly reducing valve opening until close completely, increase air-supply load, the pressure that this combustion fan is exported is greater than or equal to the pressure on air header; Described running current scope is 40A≤I < 170A;
8.2) when detect only have combustion fan to start time, and stove combustion is when being masked as minimum burning, illustrate that silicon steel high-temperature ring annealing furnace is just switched to minimum combustion regime by normal combustion state, now, if work combustion fan outlet pressure lower than air header pressure 70% time, according to this combustion fan outlet regulating valve of size adjustment of this combustion fan current value I, by constantly reducing valve opening until close completely, increase air-supply load, the pressure that this combustion fan is exported is greater than or equal to the pressure on air header; Described running current scope is 40A≤I < 170A.
Further, make above-mentioned steps 8.1) in the combustion fan for subsequent use that starting and step 8.2) in work combustion fan be index combustion fan, then as index combustion fan current value I < 40A, the aperture of this index combustion fan outlet regulating valve is adjusted to 100%; As index combustion fan current value 40A≤I < 50A, the aperture of this index combustion fan outlet regulating valve is adjusted to 80%; As index combustion fan current value 50A≤I < 70A, the aperture of this index combustion fan outlet regulating valve is adjusted to 50%; As index combustion fan current value 70A≤I < 100A, the aperture of this index combustion fan outlet regulating valve is adjusted to 30%; As index combustion fan current value 100A≤I < 170A, the aperture of this index combustion fan outlet regulating valve is adjusted to 0% (i.e. Close All).
The present invention is by exporting increase modulating valve and a pressure-detecting device at every platform combustion fan, by means of computer controlled system to the actuating signal collected, stove combustion mark, the current signal of combustion fan running, outlet pressure signal and the air header pressure signal of combustion fan carry out computational analysis, when detect combustion fan outlet pressure lower than air header pressure 70% time, according to the modulating valve that the size adjustment combustion fan of current value exports, controlling opening of valve, increase air-supply load, the pressure that combustion fan is exported is greater than or equal to the pressure on air header, thus effectively avoid the generation of blower fan surging phenomenon, protection blower fan, extend service life of fan.
Accompanying drawing explanation
Fig. 1 is Site Detection distribution flow chart.
Fig. 2 is the relation of each testing signal and computer controlled system, and wherein, stove combustion mark is that computer-internal system draws according to the combustion position logical operation of combustion medium.
Computerized algorithm flow chart when Fig. 3 is two combustion fans switchings.
Fig. 4 is computerized algorithm flow chart when normal combustion changes to minimum combustion regime in stove.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
The load current value of two combustion fans in this embodiment is 170 amperes.
Fig. 1 is Site Detection distribution flow chart.Relative to prior art, the present invention is only adding a modulating valve and a pressure-detecting device in every platform combustion fan outlet.
Fig. 2 is the graph of a relation of each testing signal and computer controlled system.As seen from Figure 2, the actuating signal of collect two combustion fans, current detection signal, outlet pressure testing signal and air header pressure detecting signal and stove combustion mark are all delivered in computer controlled system.Stove combustion mark is silicon steel high-temperature ring annealing furnace user setting, about the function of correlation factor affecting silicon steel high-temperature ring annealing furnace combustion medium combustion position, computer-internal system can carry out logical operation according to the value affecting the correlation factor of combustion medium combustion position detected, thus combustion mark of must coming out of the stove, and and then judge it is normal combustion or minimum burning in stove.
When combustion fan normally works, its current value I is always lower than load current value I
2be not less than again a minimum running current value I simultaneously
1an interval range in, i.e. I
1≤ I < I
2.The research long-term through inventor finds, as the load current value I of combustion fan
2be 170 amperehours, the minimum running current value I that combustion fan normally works
1get 40 amperes.
As shown in Fig. 3 Fig. 4, when computer system collects PAU+FCU system instruction (namely two combustion fans have actuating signal) or minimum combustion regime mark, at this moment, fan outlet pressure is far below air header pressure (namely outlet pressure is lower than 70% of air header pressure), and now the current value I of combustion fan also must be less than running current scope.According to the combustion fan gathered (when two combustion fans switch, this combustion fan is made a comment or criticism at the combustion fan for subsequent use of startup, when combustion fan is changed to minimum combustion regime by normal combustion state, finger work combustion fan) current value, regulate the aperture of this combustion fan outlet regulating valve (when computer system collects PAU+FCU system instruction, first also will according to the aperture of the outlet regulating valve of the preset combustion fan for subsequent use started of blower fan usage requirement, blower fan usage requirement in this embodiment be start time its outlet regulating valve must prefabricated aperture be PVA=30%), increase this combustion fan load, this combustion fan outlet pressure is made to be greater than or equal to air header pressure.
When combustion fan has just started start and reduce suddenly load, its outlet pressure is far below air header pressure and I < I
1, at this moment, just must open fan outlet modulating valve completely, namely outlet regulating valve opening is 100%, and when electric current I rises gradually, outlet regulating valve opening slowly closing, until electric current I is close to I
2time, modulating valve cuts out completely, and at this moment, combustion fan discharge quantity of fan and the actual Air Quantity Required coupling of pipeline, blower fan again surging phenomenon can not occur.
The aperture that combustion fan current value and fan outlet modulating valve match is in table 1.
The aperture that table 1 combustion fan current value and fan outlet modulating valve match
| Blower fan current value (unit: ampere) | Outlet regulating valve opening (unit 100%) |
| I＜40 | 100 |
| 40≤I＜50 | 80 |
| 50≤I＜70 | 50 |
| 70≤I＜100 | 30 |
| 100≤I＜170 | 0 |
Claims (2)
1., for preventing a method for blower fan surge, it is characterized in that: the method comprises the steps:
1) each increase outlet regulating valve and a pressure-detecting device is exported at every platform combustion fan;
2) actuating signal and the stove combustion mark of every platform combustion fan is gathered;
3) current detection signal of every platform combustion fan running is gathered;
4) the outlet pressure testing signal of every platform combustion fan is gathered;
5) air header pressure detecting signal is gathered;
6) the open degree feedback signal of every platform combustion fan outlet regulating valve is gathered;
7) testing signal will gathered, delivers to computer controlled system;
8) computer controlled system feeds back the result obtained according to testing signal, makes the following judgment:
8.1) when detecting that two combustion fans start, illustrate and just switched to combustion fan for subsequent use by work combustion fan, now: if the combustion fan outlet pressure for subsequent use started lower than air header pressure 70% time, then according to this combustion fan outlet regulating valve of size adjustment of the current value of the combustion fan for subsequent use started, by constantly reducing valve opening until close completely, increase air-supply load, the pressure that combustion fan is exported is greater than or equal to the pressure on air header; Described running current scope is 40A≤I < 170A;
8.2) when detect only have combustion fan to start time, and stove combustion is when being masked as minimum burning, illustrate that silicon steel high-temperature ring annealing furnace is just switched to minimum combustion regime by normal combustion state, now, if work combustion fan outlet pressure lower than air header pressure 70% time, according to this combustion fan outlet regulating valve of size adjustment of this combustion fan current value, by constantly reducing valve opening until close completely, increase air-supply load, the pressure that combustion fan is exported is greater than or equal to the pressure on air header; Described running current scope is 40A≤I < 170A.
2. according to claim 1 for preventing the method for blower fan surge, it is characterized in that:
Make above-mentioned steps 8.1) in the combustion fan for subsequent use that starting and step 8.2) in work combustion fan be index combustion fan, then as index combustion fan current value I < 40A, the aperture of this index combustion fan outlet regulating valve is adjusted to 100%; As index combustion fan current value 40A≤I < 50A, the aperture of this index combustion fan outlet regulating valve is adjusted to 80%; As index combustion fan current value 50A≤I < 70A, the aperture of this index combustion fan outlet regulating valve is adjusted to 50%; As index combustion fan current value 70A≤I < 100A, the aperture of this index combustion fan outlet regulating valve is adjusted to 30%; As index combustion fan current value 100A≤I < 170A, the aperture of this index combustion fan outlet regulating valve is adjusted to 0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432619.XA CN104265666B (en) | 2014-08-29 | 2014-08-29 | For preventing the method for blower fan surge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432619.XA CN104265666B (en) | 2014-08-29 | 2014-08-29 | For preventing the method for blower fan surge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265666A true CN104265666A (en) | 2015-01-07 |
| CN104265666B CN104265666B (en) | 2016-03-30 |
Family
ID=52157222
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410432619.XA Active CN104265666B (en) | 2014-08-29 | 2014-08-29 | For preventing the method for blower fan surge |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465029A (en) * | 2016-01-11 | 2016-04-06 | 北京北排水环境发展有限公司 | Air blower variable-frequency control device based on power frequency motor and control method for air blower variable-frequency control device |
| CN111287914A (en) * | 2020-03-24 | 2020-06-16 | 大唐贵州发耳发电有限公司 | Fan monitoring device and method |
| CN112413639A (en) * | 2020-11-17 | 2021-02-26 | 上海呈彧智能科技有限公司 | Intelligent control method and system for combustion-supporting air volume of heating furnace group |
| CN114165730A (en) * | 2021-12-06 | 2022-03-11 | 武汉科技大学 | One-key pressurization intelligent control method for mixed gas |
| CN114350867A (en) * | 2022-01-10 | 2022-04-15 | 广东韶钢松山股份有限公司 | Blast furnace operation system and combustion fan switching method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6234211A (en) * | 1985-08-07 | 1987-02-14 | Usac Electronics Ind Co Ltd | Fan drive control system |
| JP2002147365A (en) * | 2000-11-08 | 2002-05-22 | Osaka Vacuum Ltd | Exhaust pressure control device of evacuation system |
| CN101545495A (en) * | 2008-03-26 | 2009-09-30 | 上海宝信软件股份有限公司 | Device and method for controlling anti-surging of a blast blower |
| CN101691870A (en) * | 2009-09-29 | 2010-04-07 | 山东京博控股发展有限公司 | Fan switching method |
| CN201486913U (en) * | 2009-08-20 | 2010-05-26 | 宝山钢铁股份有限公司 | Anti-surging control system for fan of blast furnace |
-
2014
- 2014-08-29 CN CN201410432619.XA patent/CN104265666B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6234211A (en) * | 1985-08-07 | 1987-02-14 | Usac Electronics Ind Co Ltd | Fan drive control system |
| JP2002147365A (en) * | 2000-11-08 | 2002-05-22 | Osaka Vacuum Ltd | Exhaust pressure control device of evacuation system |
| CN101545495A (en) * | 2008-03-26 | 2009-09-30 | 上海宝信软件股份有限公司 | Device and method for controlling anti-surging of a blast blower |
| CN201486913U (en) * | 2009-08-20 | 2010-05-26 | 宝山钢铁股份有限公司 | Anti-surging control system for fan of blast furnace |
| CN101691870A (en) * | 2009-09-29 | 2010-04-07 | 山东京博控股发展有限公司 | Fan switching method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465029A (en) * | 2016-01-11 | 2016-04-06 | 北京北排水环境发展有限公司 | Air blower variable-frequency control device based on power frequency motor and control method for air blower variable-frequency control device |
| CN105465029B (en) * | 2016-01-11 | 2017-06-27 | 北京北排水环境发展有限公司 | A kind of blower variable frequency control device and its control method based on power frequency motor |
| CN111287914A (en) * | 2020-03-24 | 2020-06-16 | 大唐贵州发耳发电有限公司 | Fan monitoring device and method |
| CN112413639A (en) * | 2020-11-17 | 2021-02-26 | 上海呈彧智能科技有限公司 | Intelligent control method and system for combustion-supporting air volume of heating furnace group |
| CN114165730A (en) * | 2021-12-06 | 2022-03-11 | 武汉科技大学 | One-key pressurization intelligent control method for mixed gas |
| CN114350867A (en) * | 2022-01-10 | 2022-04-15 | 广东韶钢松山股份有限公司 | Blast furnace operation system and combustion fan switching method |
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| Publication number | Publication date |
|---|---|
| CN104265666B (en) | 2016-03-30 |
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Effective date of registration: 20170620 Address after: 430074, No. 16 Guan Shan Road, East Lake hi tech Development Zone, Hongshan District, Hubei, Wuhan Patentee after: Wuhan Steel Engineering Technology Group Communication Co., Ltd. Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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Address after: 430084 floor 15-22, building 4, Wuhan International Steel Logistics Service Center (Ganggu), Qingshan Town, Qingshan District, Wuhan City, Hubei Province Patentee after: Baoxin software (Wuhan) Co., Ltd Address before: 430074 No. 16 Guan Shan Road, East Lake hi tech Zone, Hongshan District, Wuhan, Hubei Patentee before: Wuhan Steel Engineering Technology Group Communication Co., Ltd. |
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