CN113899203B - Method for monitoring thickness change of kiln lining refractory material of rotary kiln - Google Patents
Method for monitoring thickness change of kiln lining refractory material of rotary kiln Download PDFInfo
- Publication number
- CN113899203B CN113899203B CN202111180510.8A CN202111180510A CN113899203B CN 113899203 B CN113899203 B CN 113899203B CN 202111180510 A CN202111180510 A CN 202111180510A CN 113899203 B CN113899203 B CN 113899203B
- Authority
- CN
- China
- Prior art keywords
- kiln
- rotary kiln
- refractory material
- rotary
- lining
- 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.)
- Active
Links
- 239000011819 refractory material Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000008859 change Effects 0.000 title claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000001931 thermography Methods 0.000 claims abstract description 7
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 claims description 6
- 238000004939 coking Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000005094 computer simulation Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000013178 mathematical model Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000000556 factor analysis Methods 0.000 claims 1
- 230000008520 organization Effects 0.000 claims 1
- 238000000342 Monte Carlo simulation Methods 0.000 abstract 1
- 238000013179 statistical model Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
- F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
- F27B7/42—Arrangement of controlling, monitoring, alarm or like devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
- G01B21/085—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness using thermal means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a method for monitoring thickness change of a kiln liner refractory material of a rotary kiln, which comprises the following steps: acquiring the temperature field distribution of the rotary kiln cylinder body through a plurality of thermal imaging temperature measuring devices; calculating the temperature field distribution of the refractory material in the kiln according to the obtained temperature field distribution of the rotary kiln, and primarily estimating the thickness of the refractory material of the kiln liner at the corresponding position of the rotary kiln according to a steady-state heat transfer process; and correcting the thickness of the kiln lining refractory material by adopting a Monte Carlo method and a corresponding probability statistical model, realizing real-time monitoring of the loss condition of the kiln lining refractory material of the rotary kiln, synchronizing related data to a computer or a mobile phone in real time, timely monitoring the thickness of the kiln lining refractory material in the service process, predicting the service life of the kiln lining refractory material, and providing guidance and early warning for kiln operation.
Description
Technical Field
The invention relates to a method for monitoring thickness change of kiln lining refractory materials in the field of rotary kilns.
Background
The rotary kiln is a high-temperature kiln capable of continuously rotating, has the main functions of fuel combustion, heat exchange, chemical reaction, material conveying, degradation and utilization of wastes and the like, and is widely applied to the fields of nonferrous smelting, ferrous metallurgy, chemical industry, cement, building materials and refractory materials due to good mixing performance, high-efficiency heat transfer performance and practicality. The rotary kiln mainly comprises a kiln head part, a kiln body and a kiln tail part, wherein the kiln head part is provided with a burner and a kiln head cover. The gear ring and the transmission device are power sources of the cylinder, and a feeding pipe and a kiln tail cover are arranged at the tail part of the kiln. The cylinder body is used as the main body of the heat exchanger of the rotary kiln, the inside of the cylinder body can generate high temperature under the action of the burner, the temperature can reach more than 1400 ℃, and in order to prevent the damage of the cylinder body under the action of the high temperature and the heat loss in the cylinder body, a fire-resistant layer, namely a kiln liner, is often built in the cylinder body.
The kiln lining of the rotary kiln is made of refractory materials, and under different conditions of temperature factors, chemical erosion, mechanical abrasion and the like, the refractory materials of the kiln lining can be abraded or fall off to different degrees, so that the interior of the kiln body is rugged. When the loss of the kiln lining refractory material reaches a certain degree, serious potential safety hazards can be generated if the kiln lining refractory material is not maintained in time. Therefore, the method has very important significance for monitoring the thickness of the kiln lining refractory material. At present, the temperature of the rotary kiln cylinder is measured by a contact or non-contact temperature measuring method, so that the overtemperature point of the refractory material of the kiln lining of the rotary kiln is warned empirically, and the steel plate of the kiln shell is protected.
For example, the patent with publication number of CN212512413U discloses a real-time temperature measuring system of a thermal imaging rotary kiln, which is used for carrying out full-coverage measurement on the wall temperature of a cylinder body through a temperature measuring sensor group arranged on the axial direction of the rotary kiln, monitoring the distribution condition of the wall temperature of the whole rotary kiln in real time, and detecting the phenomena of coking and refractory material falling and thinning in the kiln in advance, but can not accurately know the thickness of a kiln liner. The patent with publication number of CN210718613U discloses a thermal imaging temperature measuring device in a rotary kiln, wherein the temperature in the kiln is obtained through a hole which is arranged on a rotary kiln cylinder body and is outwards and inwards but does not penetrate through a lining in the kiln, and the reserved thickness and the heat conductivity coefficient are obtained through a set model, so that the falling thickness of the kiln lining is obtained. But the rotary kiln cylinder body cannot be monitored in a full-coverage way, and the service life of the rotary kiln can be reduced due to the fact that the cylinder body is damaged by the arranged holes from outside to inside.
In order to more accurately monitor the kiln liner loss condition of the rotary kiln and not damage the rotary kiln cylinder, the invention provides a novel method for monitoring the thickness change of the kiln liner refractory material of the rotary kiln.
Disclosure of Invention
In order to grasp the loss condition of the kiln liner refractory material of the rotary kiln in real time, the invention provides a method for monitoring the thickness change of the kiln liner refractory material of the rotary kiln so as to monitor the thickness change of the kiln liner refractory material in real time, provide guidance and early warning for kiln operation and ensure the safe use of the rotary kiln.
The invention is realized by the following modes:
the method comprises the steps of measuring the temperature field distribution of refractory materials in each section of the outer part of a rotary kiln barrel by using a thermal imaging temperature measuring device, and displaying a thermal imaging diagram of the kiln barrel, a preheating zone, a sintering zone, a transition zone and a cooling zone which are arranged from a material feeding kiln in real time, wherein the temperature distribution of each section of the kiln barrel is shown in a temperature change trend diagram in the production process;
continuously monitoring the wall temperature of the rotary kiln, and transmitting the measured data to a computer in real time through a transmission module;
thirdly, estimating the temperature field distribution of the refractory material in the rotary kiln according to the heat conductivity coefficient of the internal structure of the rotary kiln and a heat transfer mathematical model, then primarily estimating the thickness of the refractory material of the kiln lining of the rotary kiln according to the steady-state heat transfer process, analyzing and positioning the coking or shedding trend in the rotary kiln, and accurately positioning the coking or shedding position;
fourthly, analyzing internal factors and external factors of the change loss of the lining refractory material of each part of the rotary kiln at each stage and designing factors according to the measured data, establishing a zoned time-sharing model of the service damage process of the lining refractory material of the rotary kiln, performing Monte Carlo computer simulation, performing simulation prediction on the loss condition of the kiln, and correcting the estimated thickness of the lining refractory material of the kiln;
and fifthly, synchronizing the obtained data to a mobile phone, setting on-site parameters of the rotary kiln on line, and monitoring the residual thickness change of the kiln liner of the rotary kiln.
Drawings
FIG. 1 is a schematic diagram of the testing principle of the present invention.
FIG. 2 is a schematic diagram of a kiln cylinder temperature and on-line analysis system.
Claims (1)
1. A method for correcting and estimating the residual thickness of a kiln liner refractory material, the method comprising:
(1) The temperature field distribution of refractory materials in each section of the outer part of the rotary kiln cylinder is measured by using an infrared thermal imaging temperature measuring device in a full coverage way, and a thermal imaging diagram of the rotary kiln cylinder, a preheating zone, a sintering zone, a transition zone and a cooling zone temperature distribution in each section from the material feeding into the kiln, and a temperature change trend diagram in the production process are displayed in real time;
(2) Continuously monitoring the wall temperature of the rotary kiln, and transmitting the measured data to a computer in real time through a transmission module;
(3) Estimating the temperature field distribution of the refractory material in the rotary kiln according to the heat conductivity coefficient of the internal structure of the rotary kiln and a heat transfer mathematical model, and then primarily estimating the heat transfer distance according to the steady-state heat transfer process to obtain the residual thickness of the refractory material of the kiln lining of the rotary kiln, analyzing and positioning the coking or shedding trend in the rotary kiln, and accurately positioning the coking or shedding position;
(4) Carrying out internal factor and external factor analysis and factor design of the change loss of the lining refractory material of each part of the rotary kiln at each stage through the measured data, establishing a zonal time-sharing model of the service damage process of the lining refractory material of the rotary kiln, carrying out Montecello computer simulation, carrying out simulation prediction on the loss condition of the kiln, correcting the estimated thickness of the lining refractory material of the rotary kiln, quantitatively analyzing the evolution process of the organization structure of the lining refractory material of each region of the rotary kiln along with the service time and the dynamic characteristics thereof, and realizing the simulation and prediction of the service damage process of the refractory material;
(5) And synchronizing the obtained data to a mobile phone, setting on-site parameters of the rotary kiln on line, and monitoring the residual thickness change of the kiln liner of the rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111180510.8A CN113899203B (en) | 2021-10-11 | 2021-10-11 | Method for monitoring thickness change of kiln lining refractory material of rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111180510.8A CN113899203B (en) | 2021-10-11 | 2021-10-11 | Method for monitoring thickness change of kiln lining refractory material of rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113899203A CN113899203A (en) | 2022-01-07 |
| CN113899203B true CN113899203B (en) | 2024-03-22 |
Family
ID=79191195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111180510.8A Active CN113899203B (en) | 2021-10-11 | 2021-10-11 | Method for monitoring thickness change of kiln lining refractory material of rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113899203B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008241218A (en) * | 2007-03-29 | 2008-10-09 | Mitsubishi Materials Corp | Rotary kiln type high temperature treating device |
| CN103307873A (en) * | 2013-06-26 | 2013-09-18 | 中冶长天国际工程有限责任公司 | Method for detecting flue-gas temperature in rotary kiln |
| CN207035808U (en) * | 2017-07-26 | 2018-02-23 | 武汉中理环保科技有限公司 | A kind of rotary kiln with temperature measuring equipment |
| CN211503657U (en) * | 2020-02-12 | 2020-09-15 | 辽宁博联特冶金科技有限公司 | Rotary kiln without refractory material lining |
| CN212512413U (en) * | 2020-06-19 | 2021-02-09 | 新中天环保工程(重庆)有限公司 | Real-time temperature measurement system of thermal imaging rotary kiln |
-
2021
- 2021-10-11 CN CN202111180510.8A patent/CN113899203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008241218A (en) * | 2007-03-29 | 2008-10-09 | Mitsubishi Materials Corp | Rotary kiln type high temperature treating device |
| CN103307873A (en) * | 2013-06-26 | 2013-09-18 | 中冶长天国际工程有限责任公司 | Method for detecting flue-gas temperature in rotary kiln |
| CN207035808U (en) * | 2017-07-26 | 2018-02-23 | 武汉中理环保科技有限公司 | A kind of rotary kiln with temperature measuring equipment |
| CN211503657U (en) * | 2020-02-12 | 2020-09-15 | 辽宁博联特冶金科技有限公司 | Rotary kiln without refractory material lining |
| CN212512413U (en) * | 2020-06-19 | 2021-02-09 | 新中天环保工程(重庆)有限公司 | Real-time temperature measurement system of thermal imaging rotary kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113899203A (en) | 2022-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Barr et al. | A heat-transfer model for the rotary kiln: Part I. pilot kiln trials | |
| EA027851B1 (en) | Apparatus and process for monitoring the integrity of a container | |
| Hawryluk et al. | Possibilities of application measurement techniques in hot die forging processes | |
| CN103966377B (en) | Blast furnace temperature on-line checkingi acquisition system and online test method | |
| CN113899203B (en) | Method for monitoring thickness change of kiln lining refractory material of rotary kiln | |
| CN103308211B (en) | Temperature measurement system | |
| JP7241749B2 (en) | Blast furnace condition monitoring | |
| CN210711615U (en) | Device for monitoring erosion state of converter lining in real time on line | |
| CN215414040U (en) | Infrared imaging monitoring system of hot blast stove | |
| CN102102145B (en) | Method for measuring heating temperature of hot-charged blank | |
| CN114184033A (en) | Method for detecting falling position, thickness and size of refractory material of rotary kiln | |
| Sadri et al. | Smelting Furnace Non Destructive Testing (NDT) and Monitoring | |
| CN110669896B (en) | Converter body multipoint temperature measurement method | |
| Belford et al. | Development, installation, and operation of a full-copper, deep-cooled slag tap-block for a six-in-line copper slag-cleaning electric furnace | |
| Nikiforov et al. | Comprehensive Assessment of the Residual Life of Refractory Materials of High-Temperature Units | |
| CN112179945A (en) | Device and method for on-line monitoring of furnace wall defects of high-temperature reaction furnace | |
| Mihailov et al. | Model-based approach for investigation of ladle lining damages | |
| CN116336824A (en) | Double-hearth kiln wall temperature measurement early warning device | |
| CN117824376A (en) | Online monitoring method for lining condition of rotary kiln based on combination of dotted lines | |
| CN111854668B (en) | Blast furnace lining thickness calculating device and method based on distributed optical fiber temperature measurement | |
| CN214538269U (en) | Infrared thermal imaging industrial kiln lining temperature monitoring system | |
| Aripova et al. | Assessment of Reliability and Technical Risks in the Operation of Heat Engineering Units | |
| CN212458319U (en) | Blast furnace lining thickness calculating device based on distributed optical fiber temperature measurement | |
| Belford et al. | Development, installation, and operation of a full-copper, deep-cooled slag tapblock for a six-in-line copper matte settling electric furnace | |
| TWI689696B (en) | Burner monitoring method and burner monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |