CN1158900A - Choke detecting method and equipment for coal jetting branch of blast furnace - Google Patents
Choke detecting method and equipment for coal jetting branch of blast furnace Download PDFInfo
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- CN1158900A CN1158900A CN 96120460 CN96120460A CN1158900A CN 1158900 A CN1158900 A CN 1158900A CN 96120460 CN96120460 CN 96120460 CN 96120460 A CN96120460 A CN 96120460A CN 1158900 A CN1158900 A CN 1158900A
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- temperature
- jetting branch
- coal
- coal jetting
- spray gun
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Abstract
The present invention features that at the joint between the coal jetting branch and spray gun, is set temp. measuring point for measuring the pipe wall temp. of spray gun or coal jetting branch. If the measured temp. is hgiher than the set threshold value, choke is detected. The measurement equipment consists of choke detecting sensor measuring temp. and output detection signal, signal processor and alarm controlled by the processor, and it has novel design, high detection sensitivity and accuracy and reasonable structure.
Description
The present invention relates to detection method and device that the metallurgy high furnace coal jetting branch stops up.
In blast furnace is produced, for saving the consumption of coke, reduce pig iron cost, mostly adopt blast furnace PCI technology.Because often sneak into foreign matter in the coal dust, as: wooden thing, fiber and fabric, decorating film etc., thus cause coal jetting branch to stop up, destroy the homogeneity of each coal injection of draught amount of blast furnace, cause furnace temperature unbalance.At present, during most of pulverized coal injection, all need rely on the field staff frequently to observe blast-furnace tuyere, whether stop up, waste time and energy, and can only carry out discontinuity and observe with the visual determination coal jetting branch.Chinese patent " blast furnace pulverized coal arm the flow measurement device " (patent No.: 86202980), use the capacitor noise method to measure pulverized coal flow in the coal jetting branch, can be used to judge the blockage of coal jetting branch.This Device Testing precision is not high enough, and price is quite expensive.Japanese Patent " detection method of blast furnace pulverized coal pipe plug plug " (the Japan special permission Room: flat 1-132987), after stopping up according to coal jetting branch, the coal dust temperature descends than initial temperature, thus the principle of the decline when not stopping up that causes the coal jetting branch temperature.Proposition is provided with several thermometers on coal jetting branch, with the detection signal that Guan Wenwei stops up, the coal jetting branch temperature is carried out monitoring in real time, when the detected temperatures value drops to set(ting)value, can judge the detection method that coal jetting branch stops up behind the point for measuring temperature.This method set(ting)value choose influence of various factors such as being subjected to coal dust initial temperature, coal powder injection initial airflow temperature, the variation of coal jetting branch ambient air temperature, need often to adjust, and stopping up the distance between point and the point for measuring temperature, also is to influence the factor that point for measuring temperature place coal jetting branch temperature descends.Therefore, need segmentation that a plurality of points for measuring temperature are set on the up to a hundred meters long coal jetting branch,, cause the proofing unit price more expensive to improve accuracy of detection.
The purpose of this invention is to provide a kind of spray gun position and coal jetting branch position and choose point for measuring temperature in coal jetting branch and spray gun junction adjacency, with lance tube wall temperature or coal jetting branch pipe surface temperature is the detection signal of obstruction, judges coal jetting branch of blast furnace choke detecting method and device that coal jetting branch stops up.This method can overcome that the prior art accuracy of detection is poor, the shortcoming of environmental compatibility difference; This apparatus structure is reasonable, and is easy and simple to handle, good reliability, and low price.
The principle of the inventive method is after any place of coal jetting branch is stopped up, and can raise rapidly and significantly with the temperature at the spray gun position of coal jetting branch junction, also can increase with the temperature at the coal jetting branch position of this junction adjacency.For this reason, spray gun position or the coal jetting branch position chosen with above-mentioned junction adjacency are point for measuring temperature, are the detection signal of obstruction with the lance tube wall temperature or the coal jetting branch pipe surface temperature at point for measuring temperature place, carry out temperature and monitor in real time.Monitoring mode i.e. directly contact detection, also remote sensing detection.When detected temperatures when setting threshold values, promptly the decidable coal jetting branch stops up.Point for measuring temperature to choose with the spray gun position with the junction adjacency be optimal selection.Also can be with the velocity of variation of detected temperatures as second detection signal that stops up, the further obstruction of analysis and judgement coal jetting branch and defeated coaly condition.
In order to implement the foregoing invention method, apparatus of the present invention are mainly formed by surveying stifled transmitter, signal processor and warning howler.Be installed in the stifled transmitter of survey at point for measuring temperature place, mainly form by temperature element with the socket element that temperature element is placed on the point for measuring temperature, socket element can guarantee that temperature element does not directly contact with the coal dust medium, temperature element output relevant detection signal.Signal processor is connected with the stifled transmitter of survey, detection signal to input carries out analyzing and processing, determine detected temperatures and rate of temperature change value, and with itself and the comparison of setting threshold values, when temperature value or rate of temperature change value when setting threshold values, signal processor is implemented to report to the police by warning howler to the warning howler output signal, shows that coal jetting branch stops up and the defeated coaly condition of coal jetting branch.Apparatus of the present invention also can increase a remote sensor, make apparatus of the present invention carry out real-time remote sensing to point for measuring temperature and detect.Remote sensor can be installed in socket element or/and on the signal processor.Proofing unit of the present invention can stop up detection case to every coal jetting branch and show separately, reports to the police, every coal jetting branch detection signal can be introduced computer again, thereby constitute the real-time monitoring of whole bf coal injection system coal jetting branch blockage, and and then realize safety interlocking control, improve the security of coal powder injection.The stifled transmitter of survey in the proofing unit of the present invention generally can be made up of temperature element and socket element.Socket element also only needs to possess lays the function of temperature element on point for measuring temperature.Can also dispose the stifled transmitter of a kind of special survey to proofing unit of the present invention, it is characterized in that its socket element can be designed to have both simultaneously the special shape of pipeline powder coal conveying function.The socket element of this special shape has a tube cavity with spray gun pipeline equal diameters, and forms dismountable docking structure with spray gun.By the coal dust that coal jetting branch transports out, can be by the tube cavity input spray gun pipeline of socket element.Temperature element can be embedded in the tube wall of this special receptacle element, to guarantee thermometric reliability.The tube wall of socket element also can adopt corresponding exotic materials according to the special requirement of temperature measuring.
The inventive method: the coal jetting branch of blast furnace obstruction is detected the detection that is converted into the lance tube wall temperature of coal jetting branch of blast furnace and spray gun junction adjacency, promptly whether surpass the setting threshold values and judge whether coal jetting branch of blast furnace stops up with above-mentioned lance tube wall temperature; According to present method, only need each root coal jetting branch is set a point for measuring temperature, can stop up the arbitrary place of this coal jetting branch and judge; Because before and after stopping up, the temperature rise of point for measuring temperature is rapid, amplitude is big, can improve the sensitivity and the precision of detection, surveys and block up in time, and can forecast.
Apparatus of the present invention: the socket element of surveying stifled transmitter can protect temperature element directly not contact with the coal dust medium, makes it long, safety, reliable of life-span; Socket element with between spray gun is connected, can make temperature element and spray gun form relatively independent relation, socket element and spray gun easy accessibility between temperature element; Whole apparatus structure is reasonable, volume is little, easy for installation, low price; This proofing unit can use separately, also can be directly and computer connect and compose real-time detection, the warning that whole coal jetting branch of blast furnace stops up, realize relevant with it safety interlocking Controlling System.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is single coal jetting branch choke detecting method of pulverized coal injection of the present invention and apparatus structure synoptic diagram.
Fig. 2 is that coal jetting branch of blast furnace of the present invention stops up the stifled sensor construction synoptic diagram of the special survey of proofing unit.
Pulverized coal flow in the blast furnace PCI technology is to enter belly pipe 6 via coal jetting branch 1, spray gun 3 to be blown into blast-furnace tuyere by hot blast 7 as shown in Figure 1.Coal jetting branch 1 is connected at ball valve 2 places with spray gun 3.The first half of spray gun 3 is inserted in jujube shape valve 4 and spray gun sleeve pipe 5, and latter half is exposed outside.According to the principle of the inventive method, when coal jetting branch 1 took place to stop up, the temperature rise phenomenon can take place in the tube wall of spray gun 3, and its exposed latter half tube wall temperature rise is rapid and remarkable.Therefore, the inventive method is confirmed as optimum thermometric with exposed spray gun 3 latter halfs between ball valve 2 and the jujube shape valve 4 and is chosen district 8.The stifled transmitter 9 of survey is installed in optimum thermometric and chooses in the district 8, and is connected with signal processor 10.Signal processor 10 is connected with warning howler 11 again.The temperature-measuring range of surveying stifled transmitter 9 generally is chosen for 0-600 ℃, when the point for measuring temperature occurrence temperature changes, survey stifled transmitter 9 to signal processor 10 delivery temperature detection signals, be converted to the simulating signal of 4-20mA by signal processor 10, again through signal processor 10 analyzing and processing, form corresponding temperature value and rate of temperature change value, signal processor 10 compares these two values and upper temperature limit threshold values and the rate of temperature change upper limit threshold values set in advance again in signal processor 10.When the said temperature value, when the rate of temperature change value surpasses corresponding upper temperature limit threshold values, rate of temperature change upper limit threshold values, signal processor 10 sends corresponding 220v/3A switching value signal to warning howler 11, the blast furnace site operation personnel warning howler 11 sent stops up warning, so that can in time take corresponding measure or/and temperature rise is reported to the police rapidly.
As shown in Figure 2, the socket element 12 of the stifled transmitter of the special survey of proofing unit of the present invention has the tube cavity 13 of and spray gun 3 same diameter, its two ends and spray gun 3 form detachable opposite joining relation, for example: dock in flange 14 modes, can make coal dust enter the spray gun 3 of the other end swimmingly by the spray gun 3 of an end.Socket element 12 has the tube wall part 15 of a thickening, has a duct parallel with tube cavity 16 on it.In the duct 16 temperature element 17 can be installed.The lead 18 of temperature element 17 can be from the duct perforate 19 of 16 1 ends draw with signal processor 10 and be connected.
Claims (8)
1. coal jetting branch of blast furnace choke detecting method, it is characterized in that: on the spray gun position of ball valve (2) adjacency that coal jetting branch (1) is connected with spray gun (3) and coal jetting branch position, choose point for measuring temperature, spray gun (3) pipe surface temperature or coal jetting branch (1) pipe surface temperature with the point for measuring temperature place are the detection signal of obstruction, carrying out temperature monitors in real time, when monitor temperature when setting threshold values, promptly decidable coal jetting branch (1) stops up.
2. detection method according to claim 1 is characterized in that: point for measuring temperature to choose with spray gun (3) position with ball valve (2) adjacency be that optimum thermometric is chosen district (8).
3. detection method according to claim 1 and 2, it is characterized in that: temperature is monitored in real time, and removing can be direct contact detection, can also be that remote sensing detects.
4. a coal jetting branch of blast furnace stops up proofing unit, it is characterized in that: this device is formed by surveying stifled transmitter (9), signal processor (10) and warning howler (11), survey stifled transmitter (9) one or more temperature elements (17) are arranged, and be connected with signal processor (10), signal processor (10) is connected with warning howler (11) again.
5. transmitter is blocked up in survey according to claim 4, it is characterized in that: this transmitter also has socket element (12), and temperature element (17) can be installed.
6. socket element according to claim 5, it is characterized in that: this socket element has the tube cavity (13) of and spray gun (3) same diameter, its two ends and spray gun (3) form detachable opposite joining relation, and the tube wall part (15) of thickening arranged, have the duct (16) that temperature element (17) can be installed on it, the lead (18) of temperature element (17) can be from the duct perforate (19) of (16) draw with signal processor (10) and be connected.
7. socket element according to claim 5 is characterized in that: on this socket element remote sensor can be installed.
8. obstruction proofing unit according to claim 4, it is characterized in that: the signal processor of this device (10) also has the function of robot calculator, decapacitation is stopped up detection case to every coal jetting branch (1) and is shown separately, reports to the police, also can handle, realize the coal injection system real-time monitoring and the safety interlocking control of coal jetting branch blockage in whole or in part to all or part of coal jetting branch of bf coal injection system (1) detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120460A CN1047205C (en) | 1996-11-05 | 1996-11-05 | Choke detecting method and equipment for coal jetting branch of blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96120460A CN1047205C (en) | 1996-11-05 | 1996-11-05 | Choke detecting method and equipment for coal jetting branch of blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1158900A true CN1158900A (en) | 1997-09-10 |
| CN1047205C CN1047205C (en) | 1999-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96120460A Expired - Fee Related CN1047205C (en) | 1996-11-05 | 1996-11-05 | Choke detecting method and equipment for coal jetting branch of blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1047205C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100513585C (en) * | 2007-03-20 | 2009-07-15 | 钢铁研究总院 | Blocking detecting sensor, device and method for coal spraying pipeline |
| CN111122706A (en) * | 2019-12-13 | 2020-05-08 | 上海外经集团控股有限公司 | Non-contact type pipeline foreign matter exploration device and method |
| CN115138468A (en) * | 2022-07-06 | 2022-10-04 | 西安热工研究院有限公司 | Coal mill pulverized coal pipeline blockage early warning method and device and electronic equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60125307A (en) * | 1983-12-07 | 1985-07-04 | Kawasaki Steel Corp | Method for detecting clogging of powder blowing pipe communicating with tuyere or blast furnace |
| JPS6293305A (en) * | 1985-10-17 | 1987-04-28 | Kobe Steel Ltd | Detection of clogging and failure in transport piping for blowing powder fuel to blast furnace |
| CN86202980U (en) * | 1986-05-14 | 1988-04-13 | 冶金部自动化研究所 | Apparatus for measuring the flow of the coal dust through in blast furnace |
| CN86107459A (en) * | 1986-11-08 | 1988-05-18 | 冶金工业部北京钢铁设计研究总院 | The coal jetting branch of blast furnace flow regulation device |
| CN1053931A (en) * | 1990-02-10 | 1991-08-21 | 乌克兰科学院“格罗希哥夫”工程控制研究所 | Checking system for measuring quantity of coal powder blowing through tuyeres of bleast furnace |
-
1996
- 1996-11-05 CN CN96120460A patent/CN1047205C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100513585C (en) * | 2007-03-20 | 2009-07-15 | 钢铁研究总院 | Blocking detecting sensor, device and method for coal spraying pipeline |
| CN111122706A (en) * | 2019-12-13 | 2020-05-08 | 上海外经集团控股有限公司 | Non-contact type pipeline foreign matter exploration device and method |
| CN115138468A (en) * | 2022-07-06 | 2022-10-04 | 西安热工研究院有限公司 | Coal mill pulverized coal pipeline blockage early warning method and device and electronic equipment |
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| Publication number | Publication date |
|---|---|
| CN1047205C (en) | 1999-12-08 |
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