CN101725519A - Method for testing inlet temperature of blast-furnace blower - Google Patents
Method for testing inlet temperature of blast-furnace blower Download PDFInfo
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- CN101725519A CN101725519A CN200910237311A CN200910237311A CN101725519A CN 101725519 A CN101725519 A CN 101725519A CN 200910237311 A CN200910237311 A CN 200910237311A CN 200910237311 A CN200910237311 A CN 200910237311A CN 101725519 A CN101725519 A CN 101725519A
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- inlet temperature
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- thermal resistor
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Abstract
The invention relates to a method for testing the inlet temperature of a blast-furnace blower, belonging to the technical field of blast-furnace tests. The quantity of primary detection elements for detecting the inlet temperature of the blast-furnace blower is increased into three from one; a PLC control system module is allocated to monitor the inlet temperature change at the real time, and when the abnormality occurs, operation personnel takes the measures for protecting a blower system in time according to data displayed on an upper computer while the blower automatically enters into a self-protection operation state; 'two of three selections' control of the inlet temperature is realized in a PLC program, that is to say, the inlet temperature is surely high as long as measuring results of two or three thermal resistors reach more than an alarming value 60 DEG C simultaneously, the pressure of an external pipe network raises sharply to form backflow of airflow towards the blower, and finally the blower system enters safety operation. The method has the advantages that the 'two of three selections' control of the inlet temperature avoids causing false alarm of the machine unit due to the damage of one thermal resistor and entering reverse flow, and the safety factor is increased in order to ensure the stable production of a blast furnace.
Description
Technical field
The invention belongs to the blast furnace technical field of measurement and test, a kind of method of testing inlet temperature of blast-furnace blower particularly is provided, it is 3 points that the primary element of test inlet temperature of blast-furnace blower is increased to by single-point, has guaranteed the Security of blast furnace ironmaking to greatest extent.
Background technique
Current, the inlet temperature of blast-furnace blower of iron and steel enterprise mostly is single-spot testing, test element is thermal resistor (PT100), be if that this test point is owing to reasons such as element damage itself cause test result inaccurate, can cause blower system program " adverse current " chain promoter, can not guarantee that blast furnace ironmaking normally moves.
Summary of the invention
The purpose of this method is to provide a kind of method of testing inlet temperature of blast-furnace blower, stop the drawback of inlet temperature of blast-furnace blower single-spot testing, overcome the problem that the test result that causes because of test element damage itself is inaccurate, influence the blast furnace ordinary production.
The requirement of this method aspect primary detecting element is that blast furnace blower " inlet temperature " primary detecting element is increased to 3 by 1.Promptly on air-suction duct, be the technological requirement that guarantees wind speed, temperature unanimity, in two of the perforates again of each 50cm horizontal position of former thermal resistor both sides, two thermal resistors are installed respectively, three thermal resistors are equated at same horizontal line and distance.Described primary detecting element is a thermal resistor.
Configuration PLC control system module is monitored inlet temperature in real time and is changed, and when it occurs when unusual, when blower entered " self-protection " running state automatically, operator in time taked to protect the measure of blower system by the upper-position unit data presented.
This method needs to realize inlet temperature " three select two " control in the requirement aspect the software in the PLC program, promptly have only two or three thermal resistor measurement results to reach alarming value (〉=60 ℃) simultaneously, illustrates that just inlet temperature is high really, has formed adverse current.Adverse current is the most dangerous operating mode of blower unit, the reason that forms adverse current has two aspects, the one, the further developing of surge, the extraction flow and the exhaust pressure of compressor sharply descend, because the pipe network capacity is very big, ductwork pressure can not descend thereupon, form ductwork pressure greater than Compressor Discharge Pressure, cause the compressor air-discharging flow by decent zero to negative, be that pipe network gas flows backwards in compressor body, the 2nd, the process system accident raises the pressure of outside network suddenly, forms air-flow and flows backwards to blower, finally makes blower system enter safe operation.So-called " safe operation " (SAFE RUN), its definition is: stator blade returns to minimum operating angle; The atmospheric valve standard-sized sheet; Check valve is closed.As seen, " safe operation " is that blower is in a kind of non-stop-machine " self-protection " running state.But for tooling, the positive closing of blower fan outlet check valve, essence is equivalent to shut down.
Benefit of the present invention is that inlet temperature " three select two " control has been avoided causing the unit false alarm because of a thermal resistor damages, and enters adverse current; For guaranteeing that the blast furnace steady production has increased safety coefficient.
Description of drawings
Three groups of inlet temperature elementary diagrams of Fig. 1.Wherein, thermal resistor load module 1, connecting terminal block 2 (1～11 terminal), a PT100 thermal resistor 3, the 2nd PT100 thermal resistor 4, the 3rd PT100 thermal resistor 5.
Inlet temperature in Fig. 2 system program " three select two " schematic diagram.Wherein, a PT100 thermal resistor measured value 6; The 2nd PT100 thermal resistor measured value 7, the 3rd PT100 thermal resistor measured value 8.
Fig. 3 is PLC control system hardware layout figure.
Embodiment
Fig. 1～Fig. 3 is a kind of embodiment of this method.
Fig. 1 increases to 3 test elementary diagrams for inlet temperature by single-spot testing, it mainly comprises: thermal resistor load module in thermal resistor (PT100), PLC cabinet internal wiring terminal, the PLC cabinet (as routine Quantum Corporation of institute thermal resistor load module among Fig. 1, model: 140ARI03010) form by three parts.Thermal resistor (PT100) is installed on the air-suction duct by technological requirement (illustrating in summary of the invention), its elastic cable paper is introduced the lower terminal of master-control room PLC cabinet internal wiring terminal, upper terminal is connected with thermal resistor load module in the PLC cabinet, can realize thermal resistor (PT100) is detected the collection of data by CPU control.
Fig. 2 is inlet temperature " three select two " schematic diagram in the blower system program, clearly marking system program in the drawings judges three groups of temperature respectively, if and only if two groups or more when reporting to the police (〉=60 ℃) simultaneously, system thinks that just inlet temperature is too high really, and unit enters the safe operation state.For example: when having only PT100 thermal resistor 1 to detect data 〉=60 ℃, its single channel testing result is " Yes ", enters the OR door, and OR door testing result is 1＜2, and then unit does not enter safe operation; Again for example: PT100 thermal resistor 1,2 detect data all 〉=60 ℃ the time, its two-way testing result is " Yes ", enters the OR door, OR door testing result is 2=2, eligible, then unit enters safe operation.The method has avoided really that the blower system that causes because of reasons such as itself single thermal resistor damages is reported to the police, the blowing-out fault, has increased blast furnace safety in production coefficient.
Fig. 3 is PLC control system hardware layout figure, for making the blower system inlet temperature realize " three select two " control, the PLC control system must be configured to lower module: power module, CPU module, network adapter, thermal resistor load module, be connected with upper-position unit through switchboard by the communication netting twine, upper-position unit can embody the detected temperature value of module in real time on display device, really finish inlet temperature " three select two " control.
Claims (3)
1. the method for a testing inlet temperature of blast-furnace blower is characterized in that, the primary detecting element of blast furnace blower " inlet temperature " is increased to 3 by 1; And configuration PLC control system module, monitor inlet temperature in real time and change, when it occurs when unusual, when blower entered " self-protection " running state automatically, operator in time taked to protect the measure of blower system by the upper-position unit data presented;
In the PLC program, realize inlet temperature " three select two " control, when having only two or three thermal resistor measurement results to reach simultaneously greater than 60 ℃ of alarming values, illustrate that just inlet temperature is high really, the pressure of outside network raises suddenly, form air-flow and flow backwards, finally make blower system enter safe operation to blower.
2. in accordance with the method for claim 1, it is characterized in that, it is on air-suction duct that described primary detecting element with blast furnace blower " inlet temperature " increases to 3 by 1, in two of the perforates again of each 50cm horizontal position of former thermal resistor both sides, two thermal resistors are installed respectively, three thermal resistors are equated at same horizontal line and distance.
3. in accordance with the method for claim 1, it is characterized in that described primary detecting element is a thermal resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237311A CN101725519A (en) | 2009-11-13 | 2009-11-13 | Method for testing inlet temperature of blast-furnace blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237311A CN101725519A (en) | 2009-11-13 | 2009-11-13 | Method for testing inlet temperature of blast-furnace blower |
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| CN101725519A true CN101725519A (en) | 2010-06-09 |
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| CN200910237311A Pending CN101725519A (en) | 2009-11-13 | 2009-11-13 | Method for testing inlet temperature of blast-furnace blower |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145242A (en) * | 2011-04-07 | 2011-08-10 | 新兴河北工程技术有限公司 | High-temperature automatic protection device of bag-type dust collector |
| CN102927027A (en) * | 2012-08-01 | 2013-02-13 | 北京首钢自动化信息技术有限公司 | Reverse flow protective method for blast furnace blower |
| CN106246528A (en) * | 2016-08-10 | 2016-12-21 | 国网河北省电力公司电力科学研究院 | A kind of method of testing of steam feed pump |
| CN106289573A (en) * | 2016-07-19 | 2017-01-04 | 合肥威博尔汽车技术有限公司 | A kind of multi way temperature sensor temperature detection method |
| CN110344896A (en) * | 2019-07-29 | 2019-10-18 | 阜阳华润电力有限公司 | A kind of fired power generating unit steam turbine temperature measurement warning device and method |
| CN110410160A (en) * | 2019-07-24 | 2019-11-05 | 中广核工程有限公司 | A kind of nuclear power plant's Steam Turbine load closed-loop control system and method |
| CN111366843A (en) * | 2018-12-26 | 2020-07-03 | 平高集团有限公司 | Circuit breaker device and opening and closing detection method and device |
-
2009
- 2009-11-13 CN CN200910237311A patent/CN101725519A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145242A (en) * | 2011-04-07 | 2011-08-10 | 新兴河北工程技术有限公司 | High-temperature automatic protection device of bag-type dust collector |
| CN102145242B (en) * | 2011-04-07 | 2012-10-03 | 新兴河北工程技术有限公司 | High-temperature automatic protection device of bag-type dust collector |
| CN102927027A (en) * | 2012-08-01 | 2013-02-13 | 北京首钢自动化信息技术有限公司 | Reverse flow protective method for blast furnace blower |
| CN106289573A (en) * | 2016-07-19 | 2017-01-04 | 合肥威博尔汽车技术有限公司 | A kind of multi way temperature sensor temperature detection method |
| CN106246528A (en) * | 2016-08-10 | 2016-12-21 | 国网河北省电力公司电力科学研究院 | A kind of method of testing of steam feed pump |
| CN106246528B (en) * | 2016-08-10 | 2018-07-17 | 国网河北省电力公司电力科学研究院 | A kind of test method of steam feed pump |
| CN111366843A (en) * | 2018-12-26 | 2020-07-03 | 平高集团有限公司 | Circuit breaker device and opening and closing detection method and device |
| CN110410160A (en) * | 2019-07-24 | 2019-11-05 | 中广核工程有限公司 | A kind of nuclear power plant's Steam Turbine load closed-loop control system and method |
| CN110344896A (en) * | 2019-07-29 | 2019-10-18 | 阜阳华润电力有限公司 | A kind of fired power generating unit steam turbine temperature measurement warning device and method |
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Open date: 20100609 |