CN104714573A - Automatic temperature control method for sponge iron tunnel kiln and device thereof - Google Patents
Automatic temperature control method for sponge iron tunnel kiln and device thereof Download PDFInfo
- Publication number
- CN104714573A CN104714573A CN201510111380.0A CN201510111380A CN104714573A CN 104714573 A CN104714573 A CN 104714573A CN 201510111380 A CN201510111380 A CN 201510111380A CN 104714573 A CN104714573 A CN 104714573A
- Authority
- CN
- China
- Prior art keywords
- temperature
- chip microcomputer
- tunnel kiln
- sponge iron
- control
- 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.)
- Pending
Links
Abstract
The invention discloses an automatic temperature control method for a sponge iron tunnel kiln. The method comprises the following steps that a single chip microcomputer sets a tunnel kiln temperature ideal set value, a temperature sensor sends a tunnel kiln temperature signal to the single chip microcomputer, the single chip microcomputer compares the tunnel kiln temperature signal value with the tunnel kiln temperature ideal set value, an electric actuator is controlled by outputting control signals after PID operation, and the electric actuator can control the gas flow of a nozzle to achieve automatic control of the tunnel kiln temperature. The invention further discloses an automatic temperature control device for the sponge iron tunnel kiln. The automatic temperature control device comprises the nozzle and further comprises the temperature sensor for collecting nozzle signals and temperature signals, wherein the temperature sensor is connected with a signal input end of the single chip microcomputer, a signal output end of the single chip microcomputer is connected with a signal input end of the electric actuator, and a signal output end of the electric actuator is connected with an electric control sluice gate of the nozzle. The automatic temperature control device is high in control accuracy, low in tunnel kiln gas consumption, low in total production cost and widely applied to the technical field of sponge iron production.
Description
Technical field
The present invention relates to sponge iron production technical field, refer to a kind of sponge iron tunnel kiln temperature automatic control method and device thereof particularly.
Background technology
The seventies in last century, domestic beginning utilized Production of Dri In Tunnel Kiln.Because of the restriction of the factors such as technical conditions, production capacity, the market demand, tunnel cave that is designed and that use was often small at that time, and based on small-sized, energy consumption is higher.After entering 2000, along with the continuous enlargement of Chinese iron powder market scale, and the formation in emerging steel-making sponge iron market, the quantity of large tunnel kiln is on the increase.
Traditional sponge iron tunnel cave divides three functional sections: preheating section, reduction section and cooling section.Reduction section both sides arrange two row burners, inflammable gas (being generally coal gas) by burner with combustion air mixing after-combustion with heating tunnel's kiln.This process mainly relies on artificial temperature adjustment technical controlling, namely sees firer completely by virtue of experience, judges that the height of temperature regulates gas flow by-pass valve control, to ensure that the temperature of tunnel cave reaches the requirement of production technology according to the color of flame.Due to the error that the difference and manual operation of seeing firer's level of skill produce, not only easily there are the quality problems such as product underburnt, burning, Gas Resource also can be caused to waste.In addition, the burner quantity of tunnel cave is many, temperature adjustment workload large, keep consecutive production, must be equipped with more personnel, therefore cost of labor be higher.Along with the raising that rising and the market of energy prices, human cost require product quality, cost and the product quality problem of tunnel cave highlight day by day, become enterprise development, bottleneck that industrial upgrading must break through.
Summary of the invention
Object of the present invention is exactly to provide a kind of sponge iron tunnel kiln temperature automatic control method and device thereof that temperature control precision is high, tunnel cave gas consumption is low, total cost of production is low.
For achieving the above object, the sponge iron tunnel kiln temperature automatic control method designed by the present invention, comprises the steps: 1) tunnel cave temperature ideal set value is set on single-chip microcomputer; 2) utilize temperature sensor that the tunnel cave temperature signal detected in real time is passed to single-chip microcomputer; 3) with single-chip microcomputer, the tunnel cave temperature signal value detected and tunnel cave temperature ideal set value are compared, through PID arithmetic, control electric actuator by exporting control signal, described electric actuator controls the gas flow in burner, realizes tunnel cave temperature automatic control.
Preferably, it also comprises the steps: 4) with single-chip microcomputer, the tunnel cave temperature signal detected is passed to PLC (Programmable Logic Controller, programmable logic controller (PLC)), then by the function of PLC implementation data record, report printing, dynamic similation, in real time form, display historical trend.
Further, described PLC is communicated by RS485 communication modes with single-chip microcomputer.
Enter a ground again, it also comprises the steps: 5) described electric actuator lost efficacy or in emergency circumstances, manually control the gas flow in gate valve control burner, the temperature realizing tunnel cave controls.
Further, described temperature sensor is thermopair, and described electric actuator is electric proportional-regulation valve.
A kind of sponge iron tunnel kiln automatic temperature control designed by the present invention, comprise the burner being arranged in reduction section both sides in tunnel cave, also comprise the temperature sensor gathering burner temperature signal, described temperature sensor is connected with the signal input part of single-chip microcomputer, the signal output part of described single-chip microcomputer is connected with the signal input part of electric actuator, the signal output part of described electric actuator is connected with the Electronic control gate valve of burner, thus controls the aperture size of burner.
Preferably, also comprise PLC, the signal input output end of described PLC is connected with the signal input output end of single-chip microcomputer, described burner, temperature sensor and single-chip microcomputer one_to_one corresponding is provided with overlap more, and described PLC is provided with one.
Further, described PLC is communicated by RS485 communication modes with single-chip microcomputer.
Enter a ground again, also comprise the Non-follow control gate valve be connected of connecting with the Electronic control gate valve of burner.
Further, described temperature sensor is thermopair, and described electric actuator is electric proportional-regulation valve.
Principle of work of the present invention is such: the temperature data that temperature sensor collects sends single-chip microcomputer to, single-chip microcomputer by giving electric actuator control signal after PID arithmetic thus the gas flow of control tunnel kiln reduction section both sides burner, and then controls the temperature of tunnel cave.The major function of PLC is PLC program, data record and report printing.
In sum, the invention has the advantages that:
1) temperature controlled precision generally reach ± 3 DEG C, and stability and homogeneity are better, reduce secondary oxidation, improve sponge iron quality;
2) the product underburnt because human error causes and burning problem is avoided, the quality of effective guarantee sponge iron;
3) gas flow needed for tunnel cave is by average 1550m
3/ h drops to average 1450m
3/ h, saves tunnel cave gas consumption 6%;
4) each temperature adjustment class worker reduces to 2 by 3, reduces by 4 temperature adjustment works altogether, can save labour turnover every year 200000 yuan.
Accompanying drawing explanation
Fig. 1 is the structural representation of sponge iron tunnel kiln automatic temperature control of the present invention;
Fig. 2 is the schematic flow sheet of sponge iron tunnel kiln temperature automatic control method of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
See Fig. 2, a kind of sponge iron tunnel kiln temperature automatic control of the present invention method, comprises the steps:
1) tunnel cave temperature ideal set value is set on single-chip microcomputer 3;
2) utilize temperature sensor 2 that the tunnel cave temperature signal detected in real time is passed to single-chip microcomputer 3;
3) with single-chip microcomputer 3, the tunnel cave temperature signal value detected and tunnel cave temperature ideal set value are compared, through PID (ratio (proportion), integration (integration), differential (differentiation)) computing, electric actuator 4 is controlled by exporting control signal, described electric actuator 4 controls the gas flow in burner 1, realizes tunnel cave temperature automatic control;
4) the tunnel cave temperature signal detected is passed to PLC5 by described single-chip microcomputer 3, then by the function of PLC5 implementation data record, report printing, dynamic similation, in real time form, display historical trend.
5) described electric actuator 4 lost efficacy or in emergency circumstances, and manually control the gas flow that gate valve 6 controls in burner 1, the temperature realizing tunnel cave controls.
Described PLC5 is communicated by RS485 communication modes with single-chip microcomputer 3.
Described temperature sensor 2 is thermopair, and described electric actuator 4 is electric proportional-regulation valve.
See Fig. 1, sponge iron tunnel kiln automatic temperature control of the present invention, comprise the burner 1 being arranged in reduction section both sides in tunnel cave, also comprise the temperature sensor 2 gathering burner 1 temperature signal, described temperature sensor 2 is connected with the signal input part of single-chip microcomputer 3, and the signal output part of described single-chip microcomputer 3 is connected with the signal input part of electric actuator 4, the signal output part of described electric actuator 4 is connected with the Electronic control gate valve of burner 1, thus controls the aperture size of burner 1.
Sponge iron tunnel kiln automatic temperature control, also comprise PLC5, the signal input output end of described PLC5 is connected with single-chip microcomputer 3 signal input output end, described burner 1, temperature sensor 2 and overlap with single-chip microcomputer 3 for one_to_one corresponding is provided with more, and described PLC5 is provided with one.
Sponge iron tunnel kiln automatic temperature control of the present invention, also comprises the Non-follow control gate valve 6 be connected of connecting with the Electronic control gate valve of burner 1.
The leak control and check of temperature of the present invention adopts distribute control version, namely forms Distributed Control System (DCS) by PLC5 and single-chip microcomputer 3.Kiln temperature controls by automatically regulating the burner gas flow of reduction section both sides.Its feature is as follows:
1) adopt RS485 mode to communicate between PLC5 and single-chip microcomputer 3, by PLC5, temperature sintering curve is downloaded to single-chip microcomputer 3, carry out temperature automatic control by single-chip microcomputer 3;
2) on-the-spot thermopair detects that temperature signal passes to single-chip microcomputer 3, then passes to PLC5 by single-chip microcomputer 3, then by PLC5 implementation data record and report printing function, also can carry out the display of dynamic mode graphoid, in real time form, historical trend simultaneously;
3) single-chip microcomputer 3 compares the temperature detected and setting value, through PID arithmetic, controlling often to organize the total arm electric proportional-regulation valve of coal gas, realizing temperature automatic control by exporting control signal;
4) distribute control structure, has the function of concentrated management and dispersed control, overcomes the shortcoming of " point failure is then all paralysed " when man-machine interface computing machine not directly perceived and simple controls when simple instrument controls;
5) this system can realize: a certain temperature loop breaks down, and does not affect the normal operation in other loops; Single-chip microcomputer 3 breaks down, and does not affect each control loop and runs under the control of intelligent instrument;
6) tunnel cave temperature fluctuation can control within ± 5 DEG C, improves technology stability;
7) operating personnel only can complete production technology adjustment, without the need to arriving Field adjustment burner 1 gas flow by-pass valve control again in operation pulpit.
Claims (10)
1. a sponge iron tunnel kiln temperature automatic control method, is characterized in that: comprise the steps:
1) tunnel cave temperature ideal set value is set on single-chip microcomputer (3);
2) utilize temperature sensor (2) that the tunnel cave temperature signal detected in real time is passed to single-chip microcomputer (3);
3) with single-chip microcomputer (3), the tunnel cave temperature signal value detected and tunnel cave temperature ideal set value are compared, through PID arithmetic, electric actuator (4) is controlled by exporting control signal, described electric actuator (4) controls the gas flow in burner (1), realizes tunnel cave temperature automatic control.
2. sponge iron tunnel kiln temperature automatic control method according to claim 1, is characterized in that: it also comprises the steps:
4) with single-chip microcomputer (3), the tunnel cave temperature signal detected is passed to PLC (5), then by the function of PLC (5) implementation data record, report printing, dynamic similation, in real time form, display historical trend.
3. sponge iron tunnel kiln temperature automatic control method according to claim 2, is characterized in that: described PLC (5) is communicated by RS485 communication modes with single-chip microcomputer (3).
4. sponge iron tunnel kiln temperature automatic control method according to any one of claim 1 to 3, is characterized in that: it also comprises the steps:
5) described electric actuator (4) lost efficacy or in emergency circumstances, manually controlled the gas flow in gate valve (6) control burner (1), and the temperature realizing tunnel cave controls.
5. sponge iron tunnel kiln temperature automatic control method according to any one of claim 1 to 3, it is characterized in that: described temperature sensor (2) is thermopair, described electric actuator (4) is electric proportional-regulation valve.
6. one kind for realizing the sponge iron tunnel kiln automatic temperature control that method described in claim 1 designs, comprise the burner (1) being arranged in reduction section both sides in tunnel cave, it is characterized in that: also comprise the temperature sensor (2) gathering burner (1) temperature signal, described temperature sensor (2) is connected with the signal input part of single-chip microcomputer (3), the signal output part of described single-chip microcomputer (3) is connected with the signal input part of electric actuator (4), the signal output part of described electric actuator (4) is connected with the Electronic control gate valve of burner (1), thus control the aperture size of burner (1).
7. sponge iron tunnel kiln automatic temperature control according to claim 6, it is characterized in that: also comprise PLC (5), the signal input output end of described PLC (5) is connected with the signal input output end of single-chip microcomputer (3), described burner (1), temperature sensor (2) and single-chip microcomputer (3) one_to_one corresponding are provided with many covers, and described PLC (5) is provided with one.
8. sponge iron tunnel kiln automatic temperature control according to claim 7, is characterized in that: described PLC (5) is communicated by RS485 communication modes with single-chip microcomputer (3).
9. sponge iron tunnel kiln automatic temperature control according to claim 8, is characterized in that: also comprise the Non-follow control gate valve (6) be connected of connecting with the Electronic control gate valve of burner (1).
10. the sponge iron tunnel kiln automatic temperature control according to any one of claim 6 to 9, is characterized in that: described temperature sensor (2) is thermopair, and described electric actuator (4) is electric proportional-regulation valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510111380.0A CN104714573A (en) | 2015-03-13 | 2015-03-13 | Automatic temperature control method for sponge iron tunnel kiln and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510111380.0A CN104714573A (en) | 2015-03-13 | 2015-03-13 | Automatic temperature control method for sponge iron tunnel kiln and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104714573A true CN104714573A (en) | 2015-06-17 |
Family
ID=53413994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510111380.0A Pending CN104714573A (en) | 2015-03-13 | 2015-03-13 | Automatic temperature control method for sponge iron tunnel kiln and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104714573A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444914A (en) * | 2016-07-14 | 2017-02-22 | 盐城工学院 | Tunnel kiln environment conditioning method and device of automatically adjusting temperature in kiln |
| CN107247470A (en) * | 2017-06-19 | 2017-10-13 | 青海盐湖工业股份有限公司 | The automatic control system of plasm scouring again in a kind of production of potash fertilizer |
| CN110736761A (en) * | 2019-09-28 | 2020-01-31 | 同济大学 | Visual test device and method for influence of temperature changes on subway tunnel |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733944A (en) * | 2005-08-31 | 2006-02-15 | 吉林省杉松岗矿业集团复森海绵铁有限公司 | Sponge iron production method |
| CN102053640A (en) * | 2009-11-02 | 2011-05-11 | 西安中科麦特电子技术设备有限公司 | Temperature control system and temperature control method for reflow soldering machine |
| CN102331802A (en) * | 2011-07-29 | 2012-01-25 | 联众（广州）不锈钢有限公司 | System and method for controlling temperature of furnace area of annealing furnace |
| CN102566625A (en) * | 2010-12-09 | 2012-07-11 | 西安中科麦特电子技术设备有限公司 | Temperature control system for reflux welder |
| CN203034031U (en) * | 2013-01-11 | 2013-07-03 | 程光辉 | Intelligent water temperature control equipment for iron making blast furnace |
-
2015
- 2015-03-13 CN CN201510111380.0A patent/CN104714573A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1733944A (en) * | 2005-08-31 | 2006-02-15 | 吉林省杉松岗矿业集团复森海绵铁有限公司 | Sponge iron production method |
| CN102053640A (en) * | 2009-11-02 | 2011-05-11 | 西安中科麦特电子技术设备有限公司 | Temperature control system and temperature control method for reflow soldering machine |
| CN102566625A (en) * | 2010-12-09 | 2012-07-11 | 西安中科麦特电子技术设备有限公司 | Temperature control system for reflux welder |
| CN102331802A (en) * | 2011-07-29 | 2012-01-25 | 联众（广州）不锈钢有限公司 | System and method for controlling temperature of furnace area of annealing furnace |
| CN203034031U (en) * | 2013-01-11 | 2013-07-03 | 程光辉 | Intelligent water temperature control equipment for iron making blast furnace |
Non-Patent Citations (2)
| Title |
|---|
| 庞党峰等: "基于单片机与PLC的农业大棚温度控制系统设计", 《湖北农业科学》 * |
| 陆永耕: "隧道窑温度控制系统设计", 《工业加热》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106444914A (en) * | 2016-07-14 | 2017-02-22 | 盐城工学院 | Tunnel kiln environment conditioning method and device of automatically adjusting temperature in kiln |
| CN106444914B (en) * | 2016-07-14 | 2018-07-10 | 盐城工学院 | A kind of tunnel oven environment adjustment method and kiln temperature self-regulation device |
| CN107247470A (en) * | 2017-06-19 | 2017-10-13 | 青海盐湖工业股份有限公司 | The automatic control system of plasm scouring again in a kind of production of potash fertilizer |
| CN107247470B (en) * | 2017-06-19 | 2020-01-10 | 青海盐湖工业股份有限公司 | Automatic control system for repulping and washing in potash fertilizer production |
| CN110736761A (en) * | 2019-09-28 | 2020-01-31 | 同济大学 | Visual test device and method for influence of temperature changes on subway tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202032549U (en) | Header pressure coordination control system for thermal power plant boiler | |
| CN104714573A (en) | Automatic temperature control method for sponge iron tunnel kiln and device thereof | |
| CN103486655B (en) | A kind of HVAC system water dynamic balance debugging apparatus and adjustment method thereof | |
| CN103423740A (en) | System and method for automatically controlling combustion process of circulating fluidized bed boiler | |
| CN103629414A (en) | Intelligent flow regulating controller for heat supply pipe network system and regulating and controlling method thereof | |
| CN206269594U (en) | A kind of ignition furnace of sintering machine burns the fuzzy control device | |
| CN203656971U (en) | Residual oxygen analytic combustion control device of hot blast stove | |
| CN103791622A (en) | Intelligent water temperature controlling system | |
| CN202510791U (en) | Intelligent flow balancing valve with LCD (Liquid Crystal Display) | |
| CN205619266U (en) | Annealing stove gas controlling means | |
| CN204006102U (en) | Burner auxiliary fuel supply-system | |
| CN204534651U (en) | Fuel vapor combustion control system | |
| CN202955299U (en) | Controllable-water-volume temperature control valve | |
| CN204345706U (en) | A kind of rotary kiln combustion control device | |
| CN103307627A (en) | Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method | |
| CN203443336U (en) | Pulse combustion control device for oxygen-enriched combustion ceramic roller kiln | |
| CN205137524U (en) | Intelligent, modular practices thrift gas device | |
| CN103968481A (en) | Independent temperature controlling and energy saving device for subway station office platform | |
| CN204705847U (en) | Two-in-one intelligent tap control circuit | |
| CN203836339U (en) | Intelligent flow regulating controller of heat supply pipe network system | |
| CN104561412B (en) | The top pressure control method of bivalve reducer unit | |
| CN203657526U (en) | Monitoring system of kiln | |
| CN103017158A (en) | Automatic control system of smoke oven | |
| CN205349538U (en) | Pressure water pump control system is decided to multizone digit | |
| CN203320605U (en) | Energy-saving water pump control device of water supply pipe network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150617 |
|
| RJ01 | Rejection of invention patent application after publication |