CN208687779U - A kind of heater for rolling steel combustion control system - Google Patents
A kind of heater for rolling steel combustion control system Download PDFInfo
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- CN208687779U CN208687779U CN201820861169.XU CN201820861169U CN208687779U CN 208687779 U CN208687779 U CN 208687779U CN 201820861169 U CN201820861169 U CN 201820861169U CN 208687779 U CN208687779 U CN 208687779U
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- heater
- flue gas
- rolling steel
- control system
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Abstract
The utility model discloses a kind of heater for rolling steel combustion control systems, comprising: heater for rolling steel, flue gas detecting system, data acquisition control system；Flue gas detecting system includes gas sampling gun, takes tracheae and flue gas analyzer, and gas sampling gun is inserted into heater for rolling steel, takes tracheae connection gas sampling gun and flue gas analyzer；Data acquisition control system includes controller, air flow valve and gas flow valve, controller is connect by circuit with flue gas analyzer, air flow valve and gas flow valve, based on sectional combustion control theory and applied widely, transformation difficulty is small, easy for installation, use cost is low, detection ingredient is more, easy to maintain.
Description
Technical field
The utility model belongs to technical field of energy saving and environmental protection more particularly to a kind of heater for rolling steel combustion control system.
Background technique
At present both at home and abroad there are mainly two types of the Combustion System design methods of mainstream heating furnace producer: the first is to pass through calorific value
Instrument detects calorific value of gas, calculates burning required air quantity, regulates and controls each section of air-fuel ratio of heating furnace, controls combustion atmosphere in furnace；The
Two kinds be flue gas in on-line checking furnace flue remaining oxygen (zirconium oxide detection), burnt according to remaining oxygen to heating furnace
Control.
In the process of implementing the utility model, the existing technology has at least the following problems for utility model people discovery: for
Main problem existing for first way is that 1. combustion method caloric value instrument cannot reflect gas composition, it is impossible to accurately provide air-fuel
Than；2. since impurity causes the accuracy of air, gas flow meter not can guarantee in air, coal gas；3. caloric value instrument and flowmeter
Error superposition causes air-fuel ratio accuracy not can guarantee.It is to be only capable of reflection discharge cigarette for main problem existing for the second way
The combustion case of gas cannot represent each computer heating control section Actual combustion effect.Problem above is industry common problem, based on above-mentioned
The analysis of causes can be seen that at present under the premise of no precise air-fuel ratio, by the operation mode of artificial experience adjusting air-fuel ratio
It can not be achieved heating furnace optimum combustion control, the target for reducing oxidization burning loss rate and burnup.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of based on sectional combustion control theory and applicable models
Enclose the heater for rolling steel Combustion System system that wide, transformation difficulty is small, easy for installation, use cost is low, detection ingredient is more, easy to maintain
System.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the utility model is a kind of heater for rolling steel burns
Control system, comprising:
Heater for rolling steel, flue gas detecting system, data acquisition control system；
The flue gas detecting system includes gas sampling gun, takes tracheae and flue gas analyzer, the gas sampling gun insertion
It is described that tracheae is taken to connect the gas sampling gun and flue gas analyzer in the heater for rolling steel；
The data acquisition control system includes controller, air flow valve and gas flow valve, and the controller passes through
Circuit is connect with the flue gas analyzer, air flow valve and gas flow valve.
The heater for rolling steel includes furnace body, and the furnace body is equipped with air feed system, combustion system and smoke evacuation system.
The heater for rolling steel include preheating, heating, soaking bringing-up section, each section be equipped with independent flue gas detecting system and
Data acquisition control system, the furnace body pressure should be controlled in 0~-20Pa.
The gas sampling gun is inserted perpendicularly into burner hearth from tested bringing-up section furnace roof near middle position aperture.
The gas sampling gun uses two segment structures, i.e., burner hearth internal high temperature section is using high-purity corundum material, outside burner hearth
Portion's low-temperature zone uses stainless steel material；Gas sampling gun is inserted into 400mm~600mm inside burner hearth；Gas sampling gun stainless steel
Metal filter screen is arranged in matter section.
It is described to take tracheae using stainless steel material；Air pipe sleeve is taken to have insulation electrical heat tracing pipe, heating and temperature control exists
120~180 DEG C；Tracheae is taken to access the anti-purge system of nitrogen before entering flue gas analyzer system, nitrogen pressure is not less than
0.2MPa；It often draws tracheae and corresponds to a set of flue gas analyzer system.
Every flue gas analyzer system detection smoke components are O2、CO、CO2,NO；O2Using electrochemistry or pyromagnetic principle,
CO、CO2, NO use infrared principles, measurement range CO:0~10000ppm, O2: 0~25.00%, CO2:0~30.00%；NO:
0~500ppm.
A kind of control method of above-mentioned heater for rolling steel combustion control system, includes the following steps:
1) O in each control section smoke components is preset2, CO content control range；
O2, CO content control range suggestion: heating one section of O2: 1.5%~2.5%, heat two sections of O2: 1.0%~2.0%,
Heat three sections of O2: 0.8%~1.5%, soaking zone O2: 1.0%~2.5%, each section of CO:0~3000ppm, due to different heating
O in kiln gas2, CO related receptor to gas composition, the uniform sexual factor of combustion efficiency, flue gas influence, need to combine CO2Situation into
The adjustment of traveling one-step optimization, verifying, it is another up to standard for NOx emission in guarantee flue gas, it needs according to NO to O2, CO content control range
Further adjusted；
2) by taking the control of single bringing-up section as an example, each section individually controls heating furnace burning optimization process-according to this process:
1. dynamic detection compares O in burner hearth2With CO content, judge that burning deviation state-works as O2More than setting range space-time
Gas is excessive, and when CO is more than setting range, coal gas is excessive；
2. controlling temperature within the set range: O2It is excessive, reduce air mass flow；CO is excessive, reduces gas flow；
3. if control temperature is higher than setting maximum value: reducing gas flow and air mass flow step by step, then 1. by step
2. optimize combustion state with step；If controlling temperature lower than setting minimum value: increase air mass flow and gas flow step by step, then
1. 2. optimize combustion state with step by step；
4. by 1.~3. loop optimization adjust air mass flow and gas flow and make O in burner hearth2With CO content in content
In control range, burning is in optimal combustion state in furnace.
Air mass flow and gas flow are adjusted by controller control air flow valve and gas flow valve.
A technical solution in above-mentioned technical proposal has the following advantages that or beneficial effect, based on sectional combustion control reason
Opinion and it is applied widely, transformation difficulty is small, easy for installation, use cost is low, detection ingredient it is more, easy to maintain, realize reduction
Oxidization burning loss and energy consumption improve product quality and lumber recovery, the target increased economic efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the heater for rolling steel combustion control system provided in the utility model embodiment；
Fig. 2 is the schematic diagram of the data acquisition control system of Fig. 1；
Label in above-mentioned figure is equal are as follows: 1, heater for rolling steel, 2, gas sampling gun, and 3, take tracheae, 4, gas analyzer, 5,
Data acquisition control system.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to Fig. 1-2,1. a kind of heater for rolling steel combustion control system is based on sectional combustion control theory, i.e., to heating
The main each main bringing-up section smoke components (O of furnace2、CO、CO2, NO) carry out on-line checking, according to each section of smoke components data, in time
The air stoichiometry for adjusting each section makes each section of smoke components control in zone of reasonableness；2. smoke components sample mode is taken using furnace roof
Gas mode, i.e., from tested bringing-up section furnace roof near middle position, insertion burner hearth extracts flue gas；3. being removed in detection of exhaust gas compositions project
O2, outside CO, increase CO2And NO detected components, CO2It is to O2, the rational further verifying of CO control range, NO is from environmental protection
Discharge angle has reacted each tested bringing-up section combustion efficiency.
The technical solution is mainly made of heater for rolling steel, flue gas detecting system, data acquisition control system etc..
Heater for rolling steel is mainly by furnace body, air feed system, combustion system (being disposed with several space gas burners in burner hearth), row
The composition such as cigarette system.Purpose is to be evenly heated steel billet using space gas, according to heating cycle, meets next step steel rolling needs.Combustion
Burning system is divided into the bringing-up sections such as preheating, heating, soaking according to heating temperature difference.1. for the reality for guaranteeing sectional combustion control theory
Existing, each bringing-up section combustion control system must have relatively independent control function, it can independent control heating temperature and flue gas
Ingredient；2. for the uniformity and representativeness that guarantee smoke components, furnace pressure should be controlled at micro-vacuum state (about 0~-20Pa).
Flue gas detecting system mainly by gas sampling gun, take tracheae, flue gas analyzer system etc. and form.Sample mode uses
Furnace roof extracts gas mode, i.e. gas sampling gun is inserted perpendicularly into burner hearth from tested bringing-up section furnace roof near middle position aperture.To gas
For body sampling gun: 1. can be applicable in (flue-gas temperature is up to 1350 DEG C), gas under worst hot case for guarantee gas sampling gun
Body sampling gun uses 2 segment structures, i.e. burner hearth internal high temperature section uses high-purity corundum (AL2O398% or more content) material, burner hearth
Outer low temperature section uses stainless steel material；2. for the uniformity and representativeness that guarantee smoke sampling ingredient, gas sampling gun insertion
400mm~600mm inside burner hearth；3. metal mistake is arranged in gas sampling gun stainless steel material section to prevent exhaust gas dust from blocking
Strainer.For taking tracheae, stainless steel material is 1. used；2. to prevent flue gas flue gas condensing in extraction process from resistance being caused to increase
Greatly, insulation electrical heat tracing pipe is cased with outside probe tube, heating and temperature control is at 120~180 DEG C；3. to prevent filter screen from blocking,
Tracheae is taken to access the anti-purge system of nitrogen before entering flue gas analyzer system, nitrogen pressure is not less than 0.2MPa.To flue gas point
For analyzer system, 1. often draws tracheae and correspond to a set of flue gas analyzer system；2. every flue gas analyzer system detection flue gas
Ingredient is O2、CO、CO2,NO；③O2Using electrochemistry or pyromagnetic principle, CO, CO2, NO use infrared principles, measurement range CO:0
~10000ppm, O2: 0~25.00%, CO2: 0~30.00%；NO:0~500ppm；4. it is equipped with preposition gas handling system,
The processing functions such as filtering, cooled dehydrated (cooling temperature controls within 5 DEG C), refined dedusting before realization flue gas inspection.
Data acquisition control system main purpose is each control section flue gas for acquiring online flue gas detecting system in real time and transmitting
Compositional data, according to each section of pre-set control temperature and smoke components control range, adjust in real time each section of gas volume and
Air, gas proportion realize the purpose of combustion control.
Steel billet enters from heater for rolling steel preheating section, goes out from heater for rolling steel soaking zone, flue gas flow direction is in contrast.Pass through
Aperture mode is inserted into installation gas sampling gun near heater for rolling steel bringing-up section, soaking zone furnace roof middle position, by taking gas
Pipe is connected with flue gas analyzer system, and flue gas analyzer system is connected by data line and data acquisition control system.
Application method
1) O in each control section smoke components is preset2, CO content control range
O2, CO content control range suggestion: one plus section O2: 1.5%~2.5%, two plus section O2: 1.0%~2.0%, three
Add a section O2: 0.8%~1.5%, soaking zone O2: 1.0%~2.5%, each section of CO:0~3000ppm, due to different heating-furnace cigarette
O in gas2, CO related receptor to gas composition, combustion efficiency, the factors such as flue gas uniformity influence, need to combine CO2Situation carries out
Adjustment, verifying are advanced optimized, it is another to guarantee that NOx emission is up to standard in flue gas, need foundation NO to O2, CO content control range into
It advances a successive step.
2) heating furnace burning optimization process (by taking the control of single bringing-up section as an example, each section individually controls according to this process):
1. dynamic detection compares O in burner hearth2With CO content, judge that burning deviation state (works as O2Air when more than setting range
Excessive, when CO is more than setting range, coal gas is excessive)；
2. controlling temperature within the set range: O2It is excessive, reduce air mass flow；CO is excessive, reduces gas flow；
3. controlling temperature is higher than setting maximum value: reducing gas flow and air mass flow step by step, then by 1. and 2. optimizing
Combustion state；
4. controlling temperature lower than setting minimum value: increasing air mass flow and gas flow step by step, then by 1. and 2. optimizing
Combustion state；
5. by 1.~4. loop optimization adjust air mass flow and gas flow and make O in burner hearth2With CO content in content
In control range, burning is in optimal combustion state in furnace.
After above-mentioned scheme, based on sectional combustion control theory and applied widely, transformation difficulty is small, installation side
Just, use cost is low, detection ingredient is more, easy to maintain, and realizing reduces oxidization burning loss and energy consumption, improves product quality and become a useful person
Rate, the target increased economic efficiency.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as the various unsubstantialities carried out using the method concept and technical solution of the utility model change
Into, or it is not improved the conception and technical scheme of the utility model are directly applied into other occasions, in the utility model
Protection scope within.
Claims (7)
1. a kind of heater for rolling steel combustion control system comprising:
Heater for rolling steel, flue gas detecting system, data acquisition control system；
The flue gas detecting system includes gas sampling gun, takes tracheae and flue gas analyzer, described in the gas sampling gun insertion
It is described that tracheae is taken to connect the gas sampling gun and flue gas analyzer in heater for rolling steel；
The data acquisition control system includes controller, air flow valve and gas flow valve, and the controller passes through circuit
It is connect with the flue gas analyzer, air flow valve and gas flow valve.
2. heater for rolling steel combustion control system as described in claim 1, which is characterized in that the heater for rolling steel includes furnace
Body, the furnace body are equipped with air feed system, combustion system and smoke evacuation system.
3. heater for rolling steel combustion control system as claimed in claim 2, which is characterized in that the heater for rolling steel includes pre-
Heat, heating, soaking bringing-up section, each section is equipped with independent flue gas detecting system and data acquisition control system, the furnace body pressure
Power should be controlled in 0~-20Pa.
4. heater for rolling steel combustion control system as claimed in claim 3, which is characterized in that the gas sampling gun is from tested
Bringing-up section furnace roof near middle position aperture is inserted perpendicularly into burner hearth.
5. heater for rolling steel combustion control system as claimed in claim 4, which is characterized in that the gas sampling gun uses two
Segment structure, i.e. burner hearth internal high temperature section use stainless steel material using high-purity corundum material, burner hearth outer low temperature section；Gas takes
Sample rifle is inserted into 400mm~600mm inside burner hearth；Metal filter screen is arranged in gas sampling gun stainless steel material section.
6. heater for rolling steel combustion control system as claimed in claim 5, which is characterized in that described to take tracheae using stainless steel
Material；Air pipe sleeve is taken to have insulation electrical heat tracing pipe, heating and temperature control is at 120~180 DEG C；Tracheae is taken to enter flue gas point
The anti-purge system of nitrogen is accessed before analyzer system, nitrogen pressure is not less than 0.2MPa；It often draws tracheae and corresponds to a set of flue gas analysis
Instrument system.
7. heater for rolling steel combustion control system as claimed in claim 6, which is characterized in that every flue gas analyzer system inspection
Survey smoke components are O2、CO、CO2,NO；O2Using electrochemistry or pyromagnetic principle, CO, CO2, NO use infrared principles, measurement range
CO:0~10000ppm, O2: 0~25.00%, CO2: 0~30.00%；NO:0~500ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820861169.XU CN208687779U (en) | 2018-06-05 | 2018-06-05 | A kind of heater for rolling steel combustion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820861169.XU CN208687779U (en) | 2018-06-05 | 2018-06-05 | A kind of heater for rolling steel combustion control system |
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| Publication Number | Publication Date |
|---|---|
| CN208687779U true CN208687779U (en) | 2019-04-02 |
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ID=65878004
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820861169.XU Active CN208687779U (en) | 2018-06-05 | 2018-06-05 | A kind of heater for rolling steel combustion control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731025A (en) * | 2018-06-05 | 2018-11-02 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
| CN110671717A (en) * | 2019-10-25 | 2020-01-10 | 四川德胜集团钒钛有限公司 | Combustion accurate control system for steam power generation boiler |
-
2018
- 2018-06-05 CN CN201820861169.XU patent/CN208687779U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108731025A (en) * | 2018-06-05 | 2018-11-02 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
| CN110671717A (en) * | 2019-10-25 | 2020-01-10 | 四川德胜集团钒钛有限公司 | Combustion accurate control system for steam power generation boiler |
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