CN103217013A - Optimization control method of temperature gradient inside rotary kiln - Google Patents
Optimization control method of temperature gradient inside rotary kiln Download PDFInfo
- Publication number
- CN103217013A CN103217013A CN2013101746344A CN201310174634A CN103217013A CN 103217013 A CN103217013 A CN 103217013A CN 2013101746344 A CN2013101746344 A CN 2013101746344A CN 201310174634 A CN201310174634 A CN 201310174634A CN 103217013 A CN103217013 A CN 103217013A
- Authority
- CN
- China
- Prior art keywords
- kiln
- controller
- negative pressure
- temperature
- fuel
- 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
Images
Landscapes
- Feedback Control In General (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention relates to an optimization control method of temperature gradient inside a rotary kiln. The closed-ring control of the negative pressure in the kiln is realized according to the change in temperature of a kiln tail and the temperature change rate, and the closed-ring control of the air flow is realized according to the negative pressure and the load. The optimization control method effectively solve the quality problems of products caused by unreasonable distribution of the temperature field in the rotary kiln, and the fuel insufficient combustion problems caused by unreasonable temperature gradient in the rotary kiln, so as to reduce the fuel consumption and stabilize the quality of the products.
Description
Technical field
The present invention relates to industrial rotary kiln control technology field, relate in particular to thermograde optimal control method in a kind of rotary kiln.
Background technology
Rotary kiln is the important technological equipment of industries such as metallurgy, building materials, cement, the rotary kiln technology device generally includes equipment such as multistage cyclone preheater, rotary kiln and cooler, it is a kind of tilted-putted continuous rotary cylindrical kiln body, be divided into three temperature bands, i.e. preheating section, burning zone and salband from kiln tail to kiln hood.Because different material has different technological requirements to the length of preheating zone, burning zone and salband with temperature, it is directly connected to product yield, quality, consumption of raw materials and cost etc., and therefore, the rotary kiln kiln temperature is controlled to important.Too high calcining heat and excessive thermal oscillation, not only fuel consumption is very big, even kiln lining worked the mischief, to injure kiln cylinder body when serious, calcining heat is crossed to hang down and then can be had a strong impact on clinker quality, and therefore accurate rotary kiln kiln temperature is controlled and can be enhanced productivity, reduces cost, the minimizing accident.
For the monitoring of rotary kiln kiln temperature, because kiln cylinder body is done continuous rotary motion, the temperature element of installing in cylindrical shell is not easy to lead-in wire, and temperature information is difficult for transmitting, and therefore, the contact temperature-measuring mode has been subjected to very big restriction in the temperature monitoring of rotary kiln.At present, domestic and international temperature monitoring to rotary kiln, manually see the view mode of fire except that adopting the kiln hood that falls behind, basically all adopted non-contact measurement, be main flow wherein, measure its surface temperature by the energy of the emission of receiving target object, reflection and conduction, again according to heat transfer principle with the infrared scan detection, the functional relation of determining that quantitative analysis kiln discharge inner wall temperature and kiln cylinder body surface temperature exist, and then obtain the interior Temperature Distribution of kiln.This method has certain superiority, but this method is come the analytical derivation kiln temperature by the temperature of measuring rotary kiln surface, infrared radiation thermometer has certain distance from rotary kiln, cost an arm and a leg etc., therefore, this method is surveyed kiln temperature and is had hysteresis quality, and certainty of measurement also is subjected to temperature detection point coordinates, detection time, multifactor impacts such as environment on every side.Employing thermocouple temperature measurement element had appearred again afterwards, and solar powered, the contact temperature-measuring of wireless transmission temperature signal, but have system complex, and poor stability, certainty of measurement is difficult to problems such as assurance.Therefore, obtaining the rotary kiln internal temperature has difficulties to realize the rotary kiln automated production.
Summary of the invention
Problem to be solved by this invention is a thermograde optimal control method in a kind of rotary kiln of invention, solves the even problem of temperature distributing disproportionation in the rotary kiln, totally reaches desirable kiln temperature control, reduces fuel consumption, stabilized product quality.
Thermograde optimal control method in a kind of rotary kiln is provided with field instruments such as kiln end temperature controller, kiln head and tail differential temperature controller, temperature of kiln head measuring transducer, kiln end temperature measuring transducer, fuel flow rate setting apparatus, fuel flow controller, fuel flow rate measurement and actuator, wind flow setting apparatus, wind flow controller, wind flow measurement and actuator, raw material flow measuring transducer, kiln tail kiln inner pressure measuring transducer.
An act as a fuel input of flow set device of raw material flow, setting curve is set by design data or operating experience, the act as a fuel setting value of flow controller of the output of the output of fuel flow rate setting apparatus and kiln end temperature controller, kiln head and tail differential temperature controller output sum, the natural fuel flow is as measured value, each controller adopts pid control algorithm, realizes the closed-loop control of fuel flow rate.
Kiln end temperature variable quantity, kiln end temperature rate of change are as an input of negative pressure setting apparatus, the negative pressure setting apparatus is output as the function of its input variable, this function is provided with according to design data or operating experience, itself and negative pressure set value the setting value of sum as negative pressure controller, actual suction pressure is as measured value, adopt pid control algorithm, realize the closed-loop control of negative pressure in the kiln.
Fuel flow rate is as an input of wind flow setting apparatus, setting curve is set by design data or operating experience, the output sum of the output of wind flow setting apparatus and negative pressure controller is as the setting value of wind flow controller, actual wind flow is as measured value, adopt pid control algorithm, realize the closed-loop control of wind flow.
Usefulness of the present invention is: reflect temperature variations in the rotary kiln indirectly by kiln end temperature variation and kiln end temperature rate of change, this variable quantity is adjusted negative pressure control point in the kiln, with change airstream in kiln state, and then reach control kiln temperature gradient.Efficiently solve the product quality problem that the temperature field irrational distribution causes in the rotary kiln, solved, reach the reduction fuel consumption, the purpose of stabilized product quality because of the inadequate problem of the unreasonable fuel combustion that causes of kiln temperature gradient.
Description of drawings
Accompanying drawing is a thermograde optimal control method block diagram in a kind of rotary kiln.
The specific embodiment
The act as a fuel input of flow set device of raw material flow F1, setting apparatus output is the function of input variable F1, this function is provided with according to design data or operating experience; △ T12 is the difference of kiln hood and kiln end temperature, △ T12SP, △ T12 are respectively the setting value and the measured values of kiln hood and kiln tail differential temperature controller, T2SP, T2 are respectively the setting value and the measured values of kiln end temperature controller, the act as a fuel setting value of flow controller of the output of the output of fuel flow rate setting apparatus and kiln head and tail differential temperature controller, kiln end temperature controller output three sum, the act as a fuel measured value of flow controller of fuel flow rate F2, each controller all adopts pid control algorithm, realizes the closed-loop control of fuel flow rate; Kiln head and tail differential temperature controller ratio P span 150～200 wherein, the time of integration I span ∞, derivative time, the D span 30～50; Kiln end temperature controller ratio P span 80～120, the time of integration, the I span 200～300, and derivative time, the D span 10～20; Fuel flow controller ratio P span 60～90, the time of integration, the I span 30～50, and derivative time, the D span 10～20.
Kiln end temperature variable quantity △ T2 and its rate of change △ T2 ˊ are as the input of negative pressure setting apparatus, setting apparatus output is the function of input variable △ T2 and △ T2 ˊ, this function is provided with according to service data and experience, output of negative pressure setting apparatus and the setting value of negative pressure setting value sum as negative pressure controller, actual suction pressure is realized the negative pressure closed-loop control as the measured value of negative pressure controller; Fuel flow rate F2 is as the input of wind flow setting apparatus, and setting apparatus output is the function of input variable F2, and this function is provided with according to design data or operating experience; The output sum of the output of negative pressure setting apparatus and wind flow setting apparatus is as the setting value of wind flow controller, and actual wind flow F3 realizes the closed-loop control of wind flow as the measured value of wind flow controller; Wherein negative pressure controller adopts pid control algorithm, ratio P span 120～150, and the time of integration, the I span 80～100; The wind flow controller adopts the PI control algolithm, ratio P span 70～80, and the time of integration, the I span 20～30.
Claims (2)
1. thermograde optimal control method in the rotary kiln, be provided with the kiln end temperature controller, the kiln head and tail differential temperature controller, the temperature of kiln head measuring transducer, the kiln end temperature measuring transducer, the fuel flow rate setting apparatus, fuel flow controller, fuel flow rate is measured and actuator, the wind flow setting apparatus, the wind flow controller, wind flow is measured and actuator, the raw material flow measuring transducer, field instruments such as kiln tail kiln inner pressure measuring transducer, it is characterized in that: an act as a fuel input of flow set device of raw material flow, setting apparatus output is the fuel flow rate setting value, setting curve is set by design data or operating experience, the output of this setting apparatus and kiln end temperature controller, the act as a fuel setting value of flow controller of the output sum of kiln head and tail differential temperature controller, each controller adopts pid algorithm or other control algolithm, realizes the closed-loop control of fuel flow rate.
2. thermograde optimal control method in a kind of rotary kiln according to claim 1, it is characterized in that the input of kiln end temperature variable quantity, kiln end temperature rate of change as the negative pressure setting apparatus, the output of negative pressure setting apparatus is the function of its input variable, this function is provided with according to design data or operating experience, itself and negative pressure set value the setting value of sum as negative pressure controller, negative pressure controller adopts pid algorithm, realizes the closed-loop control of kiln tail negative pressure; Fuel flow rate is as an input of wind flow setting apparatus, setting curve is set by design data or operating experience, wind flow setting apparatus output is with the output of the negative pressure controller setting value as the wind flow controller, the wind flow controller adopts pid algorithm, realizes the closed-loop control of wind flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174634.4A CN103217013B (en) | 2013-05-13 | 2013-05-13 | Optimization control method of temperature gradient inside rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310174634.4A CN103217013B (en) | 2013-05-13 | 2013-05-13 | Optimization control method of temperature gradient inside rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103217013A true CN103217013A (en) | 2013-07-24 |
| CN103217013B CN103217013B (en) | 2015-02-11 |
Family
ID=48815026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310174634.4A Active CN103217013B (en) | 2013-05-13 | 2013-05-13 | Optimization control method of temperature gradient inside rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103217013B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506406A (en) * | 2013-10-23 | 2014-01-15 | 北京和隆优化科技股份有限公司 | Heating furnace temperature control method capable of quickly and automatically adapting to speed of rolling mill |
| CN104880093A (en) * | 2015-04-10 | 2015-09-02 | 李晨光 | Method for intelligently controlling temperatures of furnaces and kilns |
| CN106987710A (en) * | 2017-06-13 | 2017-07-28 | 山东钢铁股份有限公司 | A kind of online pre-control method of pelletizing production technique and device |
| CN112944886A (en) * | 2021-03-08 | 2021-06-11 | 西安凯盛建材工程有限公司 | Solid waste preparation lightweight aggregate rotary kiln device for simulation experiment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3578298A (en) * | 1969-09-26 | 1971-05-11 | Gen Electric | Method and apparatus for cement kiln control |
| US3759659A (en) * | 1972-06-08 | 1973-09-18 | Leeds & Northrup Co | Method and apparatus for cement kiln control |
| CN2828698Y (en) * | 2005-10-20 | 2006-10-18 | 朱东海 | Rotary kiln with on-lin temp measuring device on rotary kiln |
| CN101261762A (en) * | 2007-03-08 | 2008-09-10 | 原传海 | A temperature measuring method for rotary stove and its process control method |
| CN102226643A (en) * | 2011-03-28 | 2011-10-26 | 宁夏惠冶镁业集团有限公司 | Rotary kiln automatic control system and method |
-
2013
- 2013-05-13 CN CN201310174634.4A patent/CN103217013B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3578298A (en) * | 1969-09-26 | 1971-05-11 | Gen Electric | Method and apparatus for cement kiln control |
| US3759659A (en) * | 1972-06-08 | 1973-09-18 | Leeds & Northrup Co | Method and apparatus for cement kiln control |
| CN2828698Y (en) * | 2005-10-20 | 2006-10-18 | 朱东海 | Rotary kiln with on-lin temp measuring device on rotary kiln |
| CN101261762A (en) * | 2007-03-08 | 2008-09-10 | 原传海 | A temperature measuring method for rotary stove and its process control method |
| CN102226643A (en) * | 2011-03-28 | 2011-10-26 | 宁夏惠冶镁业集团有限公司 | Rotary kiln automatic control system and method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103506406A (en) * | 2013-10-23 | 2014-01-15 | 北京和隆优化科技股份有限公司 | Heating furnace temperature control method capable of quickly and automatically adapting to speed of rolling mill |
| CN103506406B (en) * | 2013-10-23 | 2015-10-21 | 北京和隆优化科技股份有限公司 | A kind of heating-furnace method for controlling temperature inner of fast automatic adaptation milling train rhythm |
| CN104880093A (en) * | 2015-04-10 | 2015-09-02 | 李晨光 | Method for intelligently controlling temperatures of furnaces and kilns |
| CN106987710A (en) * | 2017-06-13 | 2017-07-28 | 山东钢铁股份有限公司 | A kind of online pre-control method of pelletizing production technique and device |
| CN106987710B (en) * | 2017-06-13 | 2018-09-25 | 山东钢铁股份有限公司 | A kind of online pre-control method of pelletizing production technique and device |
| CN112944886A (en) * | 2021-03-08 | 2021-06-11 | 西安凯盛建材工程有限公司 | Solid waste preparation lightweight aggregate rotary kiln device for simulation experiment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103217013B (en) | 2015-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103217013B (en) | Optimization control method of temperature gradient inside rotary kiln | |
| CN103234347B (en) | Method for optimizing and controlling rotary kiln air volume | |
| CN101261762A (en) | A temperature measuring method for rotary stove and its process control method | |
| CN105180632B (en) | Dryer temprature control method and its dryer system | |
| JP6438663B2 (en) | How to measure the temperature of an object in an atmosphere with dust | |
| CN201155925Y (en) | Calcining rotary kiln temperature field detection device | |
| CN204555646U (en) | High-temperature vacuum sintering furnace infrared temperature measurement apparatus and high-temperature vacuum sintering furnace | |
| CN205090796U (en) | Burning furnace is baked over a slow fire in gyration of multiple spot temperature measurement | |
| JP2017058370A (en) | Method for measuring temperature of measured object, temperature of powder dust and concentration of powder dust | |
| CN203190824U (en) | Combustion intelligent control and black body energy saving system of heating furnace based on billet temperature monitoring | |
| CN109507360B (en) | Experimental device and test method for high-temperature calcination reaction characteristics of carbonate under temperature oscillation condition of hot carrier gas | |
| CN206131757U (en) | Device of wind -warm syndrome degree is got to stability and improvement kiln hood AQC stove from cooler | |
| CN204342439U (en) | Graphitizing furnace temp measuring system | |
| CN104776714B (en) | High-temperature vacuum sintering furnace infrared temperature measurement apparatus and high-temperature vacuum sintering furnace | |
| CN108072270A (en) | A kind of pilot scale microwave high-temperature pushed slab kiln | |
| CN204301862U (en) | Grate-cooler end clinker temperature infrared survey instrument apparatus | |
| CN202694173U (en) | Cement decomposition furnace with temperature PID fuzzy control system | |
| CN204119568U (en) | It is a kind of that be convenient to change can the heater of mode of heating used in combination | |
| CN203893647U (en) | Rotary kiln temperature measuring device | |
| CN208567555U (en) | A kind of kiln combustion control system that can be controlled by long-range cloud | |
| CN207831955U (en) | A kind of built-in thermocouple monitoring device on vacuum heat treatment furnace | |
| CN208254662U (en) | A kind of heating furnace board briquette detection system | |
| CN202692731U (en) | Kiln with constant temperature control system | |
| CN204439213U (en) | Ratio-frequency welded tube temperature collecting device | |
| CN117170435A (en) | Intelligent system capable of automatically adjusting barrel temperature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |