CN207163213U - The system of the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace - Google Patents
The system of the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace Download PDFInfo
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- CN207163213U CN207163213U CN201720940696.5U CN201720940696U CN207163213U CN 207163213 U CN207163213 U CN 207163213U CN 201720940696 U CN201720940696 U CN 201720940696U CN 207163213 U CN207163213 U CN 207163213U
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- rotary hearth
- hearth furnace
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- type probe
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Abstract
The system that the utility model provides a kind of real-time detection of atmosphere constituent in rotary hearth furnace and combustion control, including：Pneumatic driving and reversing mechanism；Combined type is popped one's head in, and combined type probe can move on rail plate, and stretch into rotary hearth furnace to monitor the data of atmosphere constituent in rotary hearth furnace；Air source box, moved for controlling the source of the gas of cylinder so as to promote combined type to pop one's head on slide rail, and the bleed pressure of cylinder is detected；Instrument main frame, popped one's head in for sending control instruction to air source box, combined type, to control combined type probe to be moved on slide rail and collect the Monitoring Data of combined type probe；PLC, the control for carrying out combustion model according to the Monitoring Data of instrument main frame receipt optimizes, and sends a command to combustion controller and the burning condition in rotary hearth furnace is optimized.Each item data that the utility model is popped one's head in detection rotary hearth furnace by combined type, and comprehensive all data carry out being optimized to the burning situation in rotary hearth furnace for adaptability, improve efficiency of combustion.
Description
Technical field
The utility model category iron content solid waste reclaims control field, and atmosphere constituent is examined in real time in specifically exactly a kind of rotary hearth furnace
Survey and the system of combustion control.
Background technology
The Direct Reduction of carbonaceous pelletizing is sufficiently complex in rotary hearth furnace, and carbonaceous pelletizing is that a numerous materials coexist and phase
Interaction, the system to react to each other, it is related to complicated physicochemical change.After raw material and binding agent mixing pressure ball, dried through drying
Dry to be transported in rotary hearth furnace siege, with the rotation of furnace bottom, furnace charge by heating zone, reducing zone, there are about more than 85% successively
Ferriferous oxide is reduced into metallized pellet, and numerous studies show, carbon-to-oxygen ratio, air-fuel ratio are that carbonaceous pelletizing is direct in influence furnace bottom
Reduce most important factor, it is carbon containing too low in burner hearth, it is unfavorable for the reduction of carbonaceous pelletizing, ultimately results in resultant metal rate mistake
It is low, reduce product quality.It is carbon containing it is too high can cause inner flue gas of the stove amount increase, bring excess load to steam generator system, influence be entirely
The stability of system.Therefore, various atmosphere constituents (particularly CO, CO in stove are understood and grasped in the rotary hearth furnace course of work2、O2) contain
Measure significant to the production for instructing rotary hearth furnace.
At present, domestic and international rotary hearth furnace is using coal gas, air mass flow and the burning of temperature feedback control stove, and operating personnel are only
Burning situation can be optimized according to the temperature in stove, due to and can not obtain in stove caused by pelletizing pyroreaction itself
CO contents, it is impossible to it is true to understand air-fuel ratio distribution, gas-air dosage can not be accurately controlled, therefore, in order to obtain furnace atmosphere
Distribution, control Deoxidation Atmosphere in Furnace, reduce the energy consume excessively, instruct steady production, it is necessary to develop new technology.
Utility model content
The purpose of this utility model, it is to provide atmosphere constituent real-time detecting system and burning optimization control in a kind of rotary hearth furnace
System processed, rotary hearth furnace process are the most technique of current processing Metallurgical dust containing zinc commercial practice, are closed by extensive both at home and abroad
Note, current domestic rotary hearth furnace technology is also immature, and further rotary hearth furnace process is studied, exploitation rotary hearth furnace furnace atmosphere into
Divide real-time detecting system and optimized control method of combustion to the maturation of rotary hearth furnace process and promote significant.Concrete scheme
It is as follows：
The system of the real-time detection of atmosphere constituent and combustion control in a kind of rotary hearth furnace, including：
Combustion controller；
Pneumatic driving and reversing mechanism, it is fixed in the side wall of the rotary hearth furnace, the pneumatic driving and reversing mechanism has rail plate, gas
Cylinder and propeller, the propeller are promoted by the cylinder and reciprocatingly slided on the rail plate；
Combined type is popped one's head in, and on the rail plate, the combined type probe can be past on the rail plate
It is multiple mobile, and the through hole opened up by rotary hearth furnace side wall is stretched into rotary hearth furnace to monitor the data of atmosphere constituent in rotary hearth furnace；
Air source box, it is connected with combined type probe and pneumatic driving and reversing mechanism, it is compound so as to promote for controlling the source of the gas of cylinder
Formula probe is moved on slide rail, and the bleed pressure of cylinder is detected；
Instrument main frame, it is connected with air source box, combined type probe, is popped one's head in for sending control instruction to air source box, combined type,
To control combined type probe to be moved on slide rail and collect the Monitoring Data of combined type probe；
PLC, it is connected with instrument main frame, for carrying out combustion model according to the Monitoring Data of instrument main frame receipt
Control optimization, and send a command to combustion controller and the burning condition in rotary hearth furnace is optimized.
Further, the combined type probe includes O2Monitoring modular, CO monitoring modulars, CO2Monitoring modular, temperature detection
Module.
Further, protection sleeve, the protective case are additionally provided with the lead to the hole site that the rotary hearth furnace side wall opens up
Cylinder is arranged on the travel path of the combined type probe, for protecting combined type to pop one's head in；
One end of the protection sleeve is fixed on the support frame of pneumatic driving and reversing mechanism, and the other end is arranged on the logical of rotary hearth furnace
Kong Zhong.
Further, the protection sleeve is the cylinder using double-decker made of stainless steel and superalloy material, and
The protection sleeve is connected with the air source box；
The air source box is toward the protection sleeve purge gas, to be cleaned to the protection sleeve, and to described
Combined type probe in protection sleeve carries out purging cooling.
Further, it is provided with and renovates in the front end of the protection sleeve.
Further, the step of control optimization of PLC progress combustion model includes：
The CO content datas of collection are handled, 0 is will be less than and is rejected more than 70% data；
To the O of collection2Content data is handled, and be will be less than 0 and is rejected more than 25% data；
To the CO of collection2Content data is handled, and be will be less than 0 and is rejected more than 30% data；
Processing data is carried out to the temperature data of collection, 0 is will be less than and the data more than 1400 DEG C is rejected；
Calculate the air-fuel ratio in rotary hearth furnace, the air-fuel ratio=rotary hearth furnace air inlet amount：Into gas volume；
According to formula theoretical air requirement V0=1/21*CO content datas, amount of actual air for combustion V=aV0Calculate as industrial furnace
The coefficient of excess air a in exit；
According to temperature data, O2Content data, CO2It is bent that content data, air-fuel ratio, coefficient of excess record temperature in rotary hearth furnace
Line and various content curves, and combustion controller is sent a control signal to, with the air being adjusted into rotary hearth furnace and combustion gas ratio
Example, realizes optimal combustion control；
After any number exceeds predetermined threshold value, alarm signal is sent.
The utility model has the advantage of：
1st, by opening up a through hole in the side wall of rotary hearth furnace so that outside combined type probe can be stretched into by the through hole
In rotary hearth furnace and each item data is detected, the calculating of multinomial critical data, and comprehensive all data are carried out according to the data of detection
Carry out being adjusted to rotary hearth furnace combustion controller for adaptability, so as to be optimized to the burning situation in rotary hearth furnace, improve combustion
Burn efficiency.
2nd, outside combined type probe by electric sliding rail come into/out rotary hearth furnace, by being controlled by air source box
System, it is convenient and safe.
3rd, protect combined type to pop one's head in by protection sleeve, while source of the gas power can be provided by air source box, on the one hand
It can be pointed to protect sleeve interior and stretched into the probe of the combined type in rotary hearth furnace to be purged, and then it is cooled,
On the other hand its cleaning can also be ensured；
4th, it is provided with and renovates, after combined type probe exits, renovate and automatically fall off, the end for protecting sleeve is closed,
To avoid heat radiation in stove.
Brief description of the drawings
, below will be to embodiment or prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The required accompanying drawing used is briefly described in description, it should be apparent that, drawings in the following description are only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the system of the real-time detection of atmosphere constituent and combustion control in a kind of rotary hearth furnace provided by the utility model
Simplified diagram；
Fig. 2 is the method for the real-time detection of atmosphere constituent and combustion control in a kind of rotary hearth furnace provided by the utility model
Flow chart；
Fig. 3 is the flow chart that PID controller carries out Combustion System in one embodiment.
Embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage the utility model to provide
Solution.It is, however, obvious to a person skilled in the art that the utility model can be without one or more of these thin
Save and be carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art
Technical characteristic is not described.
In order to thoroughly understand the utility model, detailed step and detailed structure will be proposed in following description,
To explain the technical solution of the utility model.Preferred embodiment of the present utility model is described in detail as follows, but except these
Outside being described in detail, the utility model can also have other embodiment.
The purpose of this utility model, there is provided atmosphere constituent real-time detecting system and burning optimization control in a kind of rotary hearth furnace
Method processed, various atmosphere constituents (are particularly CO, CO in stove in the understanding rotary hearth furnace course of work in real time2、O2) distribution, optimize simultaneously
Combustion System model, Deoxidation Atmosphere in Furnace can be effectively controlled, reduce the energy and consume excessively, not only energy-conservation also helps finger
Lead steady production.The utility model can the extensive use on the hot industry stove such as rotary hearth furnace, in real time detect reaction in furnace gas
The content of various composition in atmosphere, instructs hearth combustion control, and to reducing stove energy consumption, it is significant to improve product quality.
Embodiment one
In the present embodiment, the utility model provides atmosphere constituent detection and burning optimization control in real time in a kind of rotary hearth furnace
The system of system, the system mainly include：
Combustion controller (such as PID controller), for controlling the burning situation in rotary hearth furnace；
Pneumatic driving and reversing mechanism 3, is fixed in the side wall of rotary hearth furnace 1, pneumatic driving and reversing mechanism 3 have rail plate, cylinder and
Propeller, propeller are promoted by cylinder and reciprocatingly slided on rail plate；
Combined type probe 4, on rail plate, combined type probe 4 can move back and forth on rail plate, and lead to
The through hole that the side wall of rotary hearth furnace 1 opens up is crossed to stretch into rotary hearth furnace 1 to monitor the data of atmosphere constituent in rotary hearth furnace 1；
Air source box 6, it is connected with combined type probe 4 and pneumatic driving and reversing mechanism 3, it is multiple so as to promote for controlling the source of the gas of cylinder
Box-like probe 4 is moved on slide rail, and the bleed pressure of cylinder is detected；
Instrument main frame 5, it is connected with air source box 6, combined type probe 4, for sending control instruction to air source box 6, combined type
Probe 4, to control combined type probe 4 to be moved on slide rail and collect the Monitoring Data of combined type probe 4；
PLC 7, it is connected with instrument main frame 5, for carrying out burning mould according to the Monitoring Data of the receipt of instrument main frame 5
The control optimization of type, and send a command to combustion controller and the burning condition in rotary hearth furnace 1 is optimized.
In the optional embodiment of the utility model one, combined type probe 4 includes O2Monitoring modular, CO monitoring modulars, CO2
Monitoring modular, temperature detecting module, every key parameter in rotary hearth furnace can be detected by combined type probe 4, subsequently to enter
Row burning optimization provides foundation.
Prior art operation personnel are different to be only capable of controlling burning condition according to in-furnace temperature, the utility model by
The side wall of rotary hearth furnace opens up a through hole so that outside combined type probe 4 can be stretched into rotary hearth furnace and detected by the through hole
Each item data, including temperature data, CO content datas, O2Content data, CO2Content data, carried out according to the data of detection
The calculating of multinomial critical data, and comprehensive all data carry out being adjusted to rotary hearth furnace combustion controller for adaptability, so as to right
Burning situation in rotary hearth furnace optimizes, and improves efficiency of combustion.Further, outside combined type probe 4 passes through electric sliding
Rail carrys out into/out rotary hearth furnace, is controlled by air source box, convenient and safe.Due to sensing CO content datas, O2Content number
According to, CO2The sensor of content data involves great expense, therefore after in-furnace temperature is too high, pneumatic driving and reversing mechanism can drive compound
Formula probe exits out of stove automatically, to protect combined type to pop one's head in.
, may if to sense temperature in rotary hearth furnace too high for combined type probe 4 in the optional embodiment of the utility model one
Combined type probe 4 can be caused to damage, instrument main frame 5 automatically controls air source box 6 so that combined type probe 4 to be moved back from rotary hearth furnace
Go out.
In the optional embodiment of the utility model one, guarantor is additionally provided with the lead to the hole site that the side wall of rotary hearth furnace 1 opens up
Pretective sleeve pipe 2, protection sleeve 2 are arranged on the travel path of combined type probe 4, for protecting combined type probe 4；Protect sleeve 2
One end be fixed on the support frame of pneumatic driving and reversing mechanism 3, the other end is arranged in the through hole of rotary hearth furnace 1.Before protecting sleeve 2
Outside rotary hearth furnace, rear end is located in the furnace wall of rotary hearth furnace at end.
In the optional embodiment of the utility model one, protection sleeve 2 is using high-quality stainless steel and superalloy material
The cylinder of manufactured double-decker, and protect sleeve 2 to be connected with air source box 6；The past protection purge gas of sleeve 2 of air source box 6, with
Combined type probe 4 in protection sleeve 2 is carried out purging cooling and cleaned.Air source box 6 is act as：1st, provide to protection
The source of the gas that sleeve 2 is cleaned and cooled；2nd, the pneumatic source of the gas of cylinder needed for the propeller of pneumatic driving and reversing mechanism was carried out
Filter, regulation and control, detect bleed pressure, and when there is stopping the supple of gas or steam failure, send alarm signal.
In the optional embodiment of the utility model one, it is provided with the front end of protection sleeve 2 and renovates 8.Work as compressed air
When pressure exceedes setting value less than the temperature of setting value or the sensing of combined type probe 4, monitoring probe can be moved back out of burner hearth automatically
Go out, with protection probe safety, after monitoring probe exits, renovate to close automatically, to avoid heat radiation in stove.Optionally, turn over
Lid 8 is fixed on the front end of protection sleeve 2 by hinge, before combined type probe 4 is stretched into rotary hearth furnace, will renovate on 8 and turns over, make
Obtaining combined type probe 4 can enter in protection sleeve 2；When combined type probe 4 exits completely out of burner hearth, in the work of gravity
Down turned over automatically with down turnover cover, the opening of protection sleeve 2 is closed, to avoid heat radiation in stove.
In the optional embodiment of the utility model one, it is referred to shown in Fig. 2, PLC 7 carries out combustion model
The step of control optimization, includes：
The CO content datas of collection are handled, will be less than 0 and more than 70% data reject, due to coal gas using
Coal gas of converter, CO contents are less than 0 in 50-65%, therefore the CO component contents of collection, and the value more than 70% is regarded as void
Glitch, the false data that automatic rejection interference signal (such as broken string) is brought；
To the O of collection2Content data is handled, and be will be less than 0 and is rejected more than 25% data, the O2 in coal gas of converter contains
For amount below 2%, the oxygen content maximum in air is 21%, therefore the O of collection2Component content is less than 0, the value more than 25%
It is regarded as spurious signal, the false data that automatic rejection interference signal (such as broken string) is brought；
To the CO of collection2Content data is handled, and be will be less than 0 and is rejected more than 30% data, the CO in coal gas of converter2
Oxygen content maximum of the content in 15-20%, air is 0.03%, therefore the CO of collection2Component content is less than 0, is more than
30% value is regarded as spurious signal, the false data that automatic rejection interference signal (such as broken string) is brought；
Processing data is carried out to the temperature data of collection, 0 is will be less than and the data more than 1400 DEG C is rejected, rotary hearth furnace design
Temperature 0-1400 degree, therefore the temperature of collection is less than 0 degree, the value more than 1400 degree is regarded as spurious signal, automatic rejection
The false data that interference signal is brought, such as data exception etc. after thermocouple break；
Calculate the air-fuel ratio in rotary hearth furnace 1, air-fuel ratio=rotary hearth furnace air inlet amount：Into gas volume；
According to formula theoretical air requirement V0=1/21*CO content datas, amount of actual air for combustion V=aV0Calculate as industrial furnace
The coefficient of excess air a in exit, excess air coefficient are the important indicators of rotary hearth furnace operation, and a is too big then to increase flue gas volume,
Flue gas loss is caused, too small then to cannot be guaranteed fuel completely burned, a refers to air excess (surplus) coefficient in industrial furnace exit,
Preferably, a numerical value is between 1.1-1.2；
According to temperature data, O2Content data, CO2It is bent that content data, air-fuel ratio, coefficient of excess record temperature in rotary hearth furnace
Line and various content curves, and send a control signal to combustion controller, by PID adjusters automatically control each section of coal gas with
And the aperture and flow of air adjustment valve, optimal combustion control is realized, the energy does not waste, high efficiency, is rapidly achieved setting
Target, realize optimal combustion control；
In addition, after any number exceeds predetermined threshold value, instrument main frame sends alarm signal, reminds operating personnel.
Fig. 3 shows the flow chart of PID regulator control.
Embodiment two
In the present embodiment, the utility model provides atmosphere constituent detection and burning optimization control in real time in a kind of rotary hearth furnace
The method of system, as shown in Fig. 2 comprising the following steps：
Gather temperature data, CO content datas, the O of burning situation in rotary hearth furnace2Content data, CO2Content data；
The CO content datas of collection are handled, 0 is will be less than and is rejected more than 70% data；
To the O of collection2Content data is handled, and be will be less than 0 and is rejected more than 25% data；
To the CO of collection2Content data is handled, and be will be less than 0 and is rejected more than 30% data；
Processing data is carried out to the temperature data of collection, 0 is will be less than and the data more than 1400 DEG C is rejected；
Calculate the air-fuel ratio in rotary hearth furnace, air-fuel ratio=rotary hearth furnace air inlet amount：Into gas volume；
According to formula theoretical air requirement V0=1/21*CO content datas, amount of actual air for combustion V=aV0Calculate as industrial furnace
The coefficient of excess air a in exit；
According to temperature data, O2Content data, CO2It is bent that content data, air-fuel ratio, coefficient of excess record temperature in rotary hearth furnace
Line and various content curves；
According to temperature data, O2Content data, CO2Content data, air-fuel ratio, coefficient of excess are adjusted into rotary hearth furnace
Air and gas proportion, realize optimal combustion control；
After any number exceeds predetermined threshold value, alarm signal is sent.
Preferred embodiment of the present utility model is described above.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as using the common side in this area
Formula is practiced；Any those skilled in the art, in the case where not departing from technical solutions of the utility model ambit, all may be used
Technical solutions of the utility model are made with many possible changes and modifications using the methods and technical content of the disclosure above, or is repaiied
The equivalent embodiment of equivalent variations is changed to, this has no effect on substantive content of the present utility model.Therefore, it is every without departing from this practicality
The content of new technique scheme, according to the technical essence of the utility model to any simple modification made for any of the above embodiments, etc.
With change and modification, still fall within technical solutions of the utility model protection in the range of.
Claims (5)
- A kind of 1. system of the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace, it is characterised in that including：Combustion controller,Pneumatic driving and reversing mechanism, be fixed in the side wall of the rotary hearth furnace, the pneumatic driving and reversing mechanism have rail plate, cylinder and Propeller, the propeller are promoted by the cylinder and reciprocatingly slided on the rail plate；Combined type is popped one's head in, and on the rail plate, the combined type probe can back and forth move on the rail plate It is dynamic, and the through hole opened up by rotary hearth furnace side wall is stretched into rotary hearth furnace to monitor the data of atmosphere constituent in rotary hearth furnace；Air source box, it is connected with combined type probe and pneumatic driving and reversing mechanism, for controlling the source of the gas of cylinder so as to promoting combined type to visit Head moves on slide rail；Instrument main frame, it is connected with air source box, combined type probe, is popped one's head in for sending control instruction to air source box, combined type, with control Combined type probe processed moves on slide rail and collects the Monitoring Data of combined type probe；PLC, it is connected with instrument main frame, for carrying out the control of combustion model according to the Monitoring Data of instrument main frame receipt Optimization, and send a command to combustion controller and the burning condition in rotary hearth furnace is optimized.
- 2. the system of detection and combustion control, its feature exist atmosphere constituent in real time in rotary hearth furnace as claimed in claim 1 In the combined type probe includes O2Monitoring modular, CO monitoring modulars, CO2Monitoring modular, temperature detecting module.
- 3. the system of detection and combustion control, its feature exist atmosphere constituent in real time in rotary hearth furnace as claimed in claim 1 In being additionally provided with protection sleeve at the lead to the hole site that the rotary hearth furnace side wall opens up, the protection sleeve is arranged on described multiple On the travel path of box-like probe, for protecting combined type to pop one's head in；One end of the protection sleeve is fixed on the support frame of pneumatic driving and reversing mechanism, and the other end is arranged on the through hole of rotary hearth furnace In.
- 4. the system of detection and combustion control, its feature exist atmosphere constituent in real time in rotary hearth furnace as claimed in claim 3 In, it is described protection sleeve be using double-decker made of stainless steel and superalloy material cylinder, and it is described protection sleeve with The air source box is connected；The air source box is toward the combined type probe purge gas in the protection sleeve, so that combined type probe is cooled and protected Hold cleaning.
- 5. the system of detection and combustion control, its feature exist atmosphere constituent in real time in rotary hearth furnace as claimed in claim 3 In being provided with and renovate in the front end of the protection sleeve.
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| CN201720940696.5U CN207163213U (en) | 2017-07-31 | 2017-07-31 | The system of the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720940696.5U CN207163213U (en) | 2017-07-31 | 2017-07-31 | The system of the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314671A (en) * | 2017-07-31 | 2017-11-03 | 宝武集团环境资源科技有限公司 | The system and method for the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace |
| CN113091452A (en) * | 2021-04-14 | 2021-07-09 | 中冶赛迪技术研究中心有限公司 | Configuration method of combustion system of rotary hearth furnace |
-
2017
- 2017-07-31 CN CN201720940696.5U patent/CN207163213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107314671A (en) * | 2017-07-31 | 2017-11-03 | 宝武集团环境资源科技有限公司 | The system and method for the real-time detection of atmosphere constituent and combustion control in rotary hearth furnace |
| CN113091452A (en) * | 2021-04-14 | 2021-07-09 | 中冶赛迪技术研究中心有限公司 | Configuration method of combustion system of rotary hearth furnace |
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