CN104109539A - Heating control method for constant pressure gas blending coke oven - Google Patents
Heating control method for constant pressure gas blending coke oven Download PDFInfo
- Publication number
- CN104109539A CN104109539A CN201410269082.XA CN201410269082A CN104109539A CN 104109539 A CN104109539 A CN 104109539A CN 201410269082 A CN201410269082 A CN 201410269082A CN 104109539 A CN104109539 A CN 104109539A
- Authority
- CN
- China
- Prior art keywords
- gas
- coke
- oven
- blast furnace
- blending
- 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
Landscapes
- Coke Industry (AREA)
Abstract
The invention discloses a heating control method for constant pressure gas blending coke oven, and belongs to the technical field of coke oven heating control method. The method is used to carry out automatic control on coke oven blending heating. The technical scheme comprises the following steps: on-line monitoring the coke oven main pressure, the blast furnace gas flow, the flow of coke oven gas for blending, and the flue suction force; establishing a mathematic formula for calculating the coke oven gas blending flow, calculating the mixing amount of coke oven gas according to the measured data; establishing a mathematic formula for calculating the blast furnace gas flow, calculating the set flow of the blast furnace gas according to the flow of the mixed coke oven gas; establishing a mathematic formula for calculating the sub-flue suction force, and calculating the suction force set values of the machine side sub-flue and the coke side sub-flue of the coke oven according to the percentage of the mixed coke oven gas in the blast furnace gas. The method can adjust the coke oven gas blending amount according to the gas main pressure and the calculation formula, thus the automatic blending heating of coke oven gas is achieved, moreover, the phenomenon of gas dissipation due to the gas overpressure in the pipe network is effectively relieved and at the same time the normal production of coke oven is not affected.
Description
Technical field
The present invention relates to a kind of automatic blending coke oven heating control method under level pressure coal gas, belong to coke oven heating control method and technology field.
Background technology
In coking is produced, coke oven heating control is the key link during coking is produced, to problems such as the quality of the control effect of temperature coking is produced normally by directly having influence on, the utilization of coking quality product, coke oven life-span, the energy and environment protection.In actual production, coke-oven plant is affected by blast furnace gas and the coke-oven gas Subscriber Unit condition of production because of gas flow and pressure, for guaranteeing that coal gas is outer, supply and equilibrium system pressure, coke-oven plant is used to coke-oven gas and blast furnace (BF) gas heating overall arrangement, coke oven heating gas need to be switched in time heating gas, control coke-oven gas blending amount flexibly, realizes the gas pressure in balance pipe network, reduces gas pressure fluctuation, reduce coal gas diffusion probability, the gas saving energy.
Below for mixing the calculation formula of blast furnace gas after coke-oven gas
Q in formula
v-----coke oven normal heating is used separately the flow (m of blast furnace gas
3/ h);
Y
1-----mixes the set(ting)value (m of corresponding blast furnace gas after coke-oven gas
3/ h);
X-----coke-oven gas blending amount (m
3/ h);
Q
high----standard blast furnace gas calorific value 3300kJ/m
3
Q
burnt----standard coke-oven gas calorific value 16720kJ/m
3
Former coke-oven gas blending amount is according to the incorporation of coal gas, to be generally no more than this principle of 3%--8% of mixed gas cumulative volume, by artificial calculating, then inputs to fixed number value, and computer automatically adjusts and mixes according to given numerical value.And blast furnace gas flow number given be manually to calculate by formula (1), the suction of minute flue adopts empirical value to increase and decrease the given numerical value of flue suction force according to the variation of gas flow.This control heating means do not have the effect of automatically adding and subtracting blending amount according to pressure, can only manually change given numerical value and carry out blending.Increase and decrease manually given Numerical Control, not only work frequent, can't be in time according to coke-oven gas pressure change timely adjustment blending amount and flue suction force, and also control lag has randomness, cause gaspipe network low pressure and coal gas diffusion, pollute to normal heating order and physical environment.Therefore in the urgent need to taking a kind of new coal gas mixing method, to reach minimizing coal gas diffusion, the gas saving energy, realizes gaspipe network object evenly.
Summary of the invention
Technical problem to be solved by this invention is to provide the coke oven heating control method of a kind of level pressure coal gas blending, this coke oven heating control method can be set up total pipe pressure and coke-oven gas blending amount set(ting)value, the renewal blast furnace gas corresponding mathematical model of flow set(ting)value and calculation formula, according to calculation formula, according to gas main pressure, regulate coke-oven gas blending amount, realize the automatic blending heating of coke-oven gas, under the prerequisite of assurance coke oven normal heating stably manufactured, effectively alleviate due to the excessive phenomenon that occurs coal gas diffusion of pipe network gas pressure.
The technical scheme solving the problems of the technologies described above is:
A coke oven heating control method for level pressure coal gas blending, it adopts following steps:
A) the total pipe pressure of on-line monitoring coke-oven gas, blast furnace gas flow, mixing coke-oven gas flow, flue suction force, and a numerical value of collection in 15 minutes counts database;
B) set up the mathematical formula that calculates coke-oven gas blending flow, according to take off data, calculate and determine the incorporation of coke-oven gas;
C) set up to calculate the mathematical formula of blast furnace gas flow, according to the coke-oven gas flow mixing, in the situation that guaranteeing that calorific value is constant, calculate and the setting flow of definite blast furnace gas;
D) set up the mathematical formula that calculates minute flue suction force, by on-line monitoring coke-oven gas flow, blast furnace gas flow, calculate the compound percentages of coke-oven gas and blast furnace gas, then according to the blast furnace gas compound percentages of the coke-oven gas that mixes calculate coke oven machine, coke side divides flue suction force set(ting)value.
The coke oven heating control method of above-mentioned level pressure coal gas blending, is generally this principle of 3%--8% of mixed gas cumulative volume according to the blending flow of coke-oven gas, the mathematical formula that calculates coke-oven gas blending flow is:
3/97Y≤X≤8/92Y
Y----blast furnace gas flow (m in formula
3/ h), X----coke-oven gas blending flow (m
3/ h).
The coke oven heating control method of above-mentioned level pressure coal gas blending, the mathematical formula of described calculating blast furnace gas flow is:
Q in formula
v----extrapolate the flow (m that blast furnace gas is used in coke oven heating according to coking heat consumption
3/ h);
Q
phase---the suitable thermal losses of-coking (kJ/kg);
N---the hole count of-mono-coke furnace carbonization chamber;
Q
m----coking chamber on average fills dry coal amount (kg/ hole);
The τ----coking chamber turnover time (h);
Q
high---the calorific value (kJ/m of-heating blast furnace gas
3)
K
tk
pk
change-----is respectively temperature, pressure and commutation correction coefficient.
The coke oven heating control method of above-mentioned level pressure coal gas blending, the mathematical formula that the set(ting)value of corresponding blast furnace gas after coke-oven gas is mixed in described calculating is:
Y in formula
1-----mixes the set(ting)value (m of corresponding blast furnace gas after coke-oven gas
3/ h);
X-----coke-oven gas blending amount (m
3/ h);
Q
high----blast furnace gas calorific value (kJ/m
3);
Q
burnt----coke-oven gas calorific value (kJ/m
3).
The coke oven heating control method of above-mentioned level pressure coal gas blending, the formula of mathematical of described minute flue suction force is:
formula (6)
P in formula
inhale----minute flue suction force (Pa)
P
if----minute flue suction force set(ting)value (Pa)
X
1----coke-oven gas blending amount per-cent (%)
The coke oven heating control method of above-mentioned level pressure coal gas blending, the formula of mathematical of the compound percentages of described coke-oven gas and blast furnace gas is
X in formula
1----coke-oven gas blending amount per-cent (%)
X----coke-oven gas blending flow (m
3/ h)
Y----blast furnace gas flow (m
3/ h)
Usefulness of the present invention is:
The present invention is directed to coke-oven gas house steward pressure surge frequent, is balance coal gas user and system pressure, changes and determines coke-oven gas blending amount set(ting)value by the total pipe pressure of coke-oven gas, makes it reach automatic blending.
The present invention has set up the total pipe pressure of coke-oven gas and coke-oven gas blending amount set(ting)value, upgrade the corresponding mathematical model of blast furnace gas flow set(ting)value, pass through calculation formula, can regulate coke-oven gas blending amount according to gas main pressure, coke oven, the plus-minus of blast furnace gas flow is adjusted automatically according to caloric power of gas, realize the automatic blending heating of coke-oven gas, divide the suction of flue to automatically adjust according to the per-cent of blending amount, guaranteeing under the prerequisite of coke oven normal heating stably manufactured, adjust the fruit that coal gas blending amount reaches expection effect, effectively alleviated due to the excessive phenomenon that occurs coal gas diffusion of pipe network gas pressure.
The problem that the invention solves automatic blending coke oven heating control under long-term puzzlement level pressure coal gas, has obtained very good effect, has greatly promoted the economic benefit of enterprise, has also promoted environment protection, has significant social benefit.
Embodiment
The present invention proposes a kind of automatic blending coke oven heating control method under level pressure coal gas, the calorific value that the method has been set up the total pipe pressure of coke-oven gas, coke-oven gas blending amount and blast furnace, coke-oven gas is the mathematical model of blast furnace gas flow when, provide coke-oven gas blending amount and mix after coke-oven gas, the calculation formula of corresponding blast furnace gas flow set(ting)value.
Present method one is to consider the blending principle of coke-oven gas; The 2nd, how many effective combinations by total pipe pressure size with coke-oven gas blending flow, avoid causing because pressure is excessive coal gas diffusion; The 3rd, consider the impact of the variation of blending amount on mixed gas calorific value, according to blending amount and calorific value, change, blast furnace gas flow is made to accurate adjustment, for realizing the steady running of heating control system, caloric power of gas need to be made to model joins in heating control system, heating control system can change and carry out the change of corresponding heating gas flow and the adjusting of suction according to the caloric power of gas of on-line measurement, thereby improve stability and the reliability of whole heating control system, reduce to greatest extent the object of coking heat consumption, save energy.The 4th, set in maximum blending and be limited to 8%, not only guaranteed that coal gas can fully burn, and avoided due to the excessive regenerator jam that causes of blending amount.
Technical solution of the present invention is taked following steps:
A) the total pipe pressure of on-line monitoring coke-oven gas, blast furnace gas flow, mixing coke-oven gas flow, flue suction force, and a numerical value of collection in 15 minutes counts database.
The total pipe pressure of on-line monitoring coke-oven gas, by being subdivided into five grades between force value 4.6-5.3kPa, be respectively that 4.6-4.8kPa is a grade, 4.8-5.0kPa is a grade, and 5.0-5.1kPa is a grade, 5.1-5.3kPa is a grade, is greater than 5.3kPa for last grade.These 5 groups of numerical value are charged to respectively in the constant block in program, when a true pressure condition of corresponding numerical value output in the scope of one group of numerical value therein.While on-line monitoring blast furnace, coke-oven gas calorific value, and a numerical value of collection in 15 minutes counts database.(referring to table 1, table 2)
B) set up the mathematical formula that calculates coke-oven gas blending flow, according to take off data, calculate and determine the incorporation of coke-oven gas.
According to the blending amount of coke-oven gas, be generally this principle of 3%--8% of mixed gas cumulative volume, set up coal gas blending amount calculation formula as follows:
3% blending amount X=3/97Y formula (2) of mixed gas cumulative volume
8% blending amount X=8/92Y formula (3) of mixed gas cumulative volume
3/97Y≤X≤8/92Y
X----coke-oven gas blending flow (m in formula
3/ h), Y----blast furnace gas flow (m
3/ h).
C) set up to calculate the mathematical formula of blast furnace gas flow, according to the coke-oven gas flow mixing, in the situation that guaranteeing that calorific value is constant, calculate and the setting flow of definite blast furnace gas.
The mathematical formula that calculates blast furnace gas flow is:
Q in formula
v----extrapolate the flow (m that blast furnace gas is used in coke oven heating according to coking heat consumption
3/ h);
Q
phase---the suitable thermal losses of-coking (kJ/kg);
N---the hole count of-mono-coke furnace carbonization chamber;
Q
m----coking chamber on average fills dry coal amount (kg/ hole);
The τ----coking chamber turnover time (h);
Q
high---the calorific value (kJ/m of-heating blast furnace gas
3)
K
tk
pk
change-----is respectively temperature, pressure and commutation correction coefficient.
The mathematical formula that the set(ting)value of corresponding blast furnace gas after coke-oven gas is mixed in calculating is:
Y in formula
1-----mixes the set(ting)value (m of corresponding blast furnace gas after coke-oven gas
3/ h);
X-----coke-oven gas blending amount (m
3/ h);
Q
high----blast furnace gas calorific value (kJ/m
3);
Q
burnt----coke-oven gas calorific value (kJ/m
3).
D) set up the mathematical formula that calculates minute flue suction force, by on-line monitoring coke-oven gas flow, blast furnace gas flow, calculate the compound percentages of coke-oven gas and blast furnace gas, then according to the blast furnace gas compound percentages of the coke-oven gas that mixes calculate coke oven machine, coke side divides flue suction force set(ting)value.(referring to table 1, table 2)
The compound percentages of coke-oven gas and blast furnace gas is X
1
X in formula
1----coke-oven gas blending amount per-cent (%);
X----coke-oven gas blending flow (m
3/ h);
Y----blast furnace gas flow (m
3/ h).
Known according to calculating and putting into practice, the coke oven turnover time, ratio of mixture increased by 1% in the time of 18 hours, and minute flue suction force reduces 5Pa left and right.
P in formula
inhale----minute flue suction force (Pa);
P
if----minute flue suction force set(ting)value (Pa);
X
1----coke-oven gas blending amount per-cent (%).
Table 1 is the total pipe pressure of coke-oven gas, coal gas blending setting, blending per-cent and flue suction force relation table
Table 2 is the partial datas that intercept from a large amount of experimental datas, according to the corresponding relation between interpretation coke oven gas main pressure, coke-oven gas blending amount, blast furnace gas flow, flue suction force.
Claims (5)
1. a coke oven heating control method for level pressure coal gas blending, is characterized in that: it adopts following steps:
A) the total pipe pressure of on-line monitoring coke-oven gas, blast furnace gas flow, mixing coke-oven gas flow, flue suction force, and a numerical value of collection in 15 minutes counts database;
B) set up the mathematical formula that calculates coke-oven gas blending flow, according to take off data, calculate and determine the incorporation of coke-oven gas;
C) set up to calculate the mathematical formula of blast furnace gas flow, according to the coke-oven gas flow mixing, in the situation that guaranteeing that calorific value is constant, calculate and the setting flow of definite blast furnace gas;
D) set up the mathematical formula that calculates minute flue suction force, by on-line monitoring coke-oven gas flow, blast furnace gas flow, calculate the compound percentages of coke-oven gas and blast furnace gas, then according to the blast furnace gas compound percentages of the coke-oven gas that mixes calculate coke oven machine, coke side divides flue suction force set(ting)value.
2. the coke oven heating control method of level pressure coal gas according to claim 1 blending, is characterized in that: according to the blending flow of coke-oven gas, be generally this principle of 3%--8% of mixed gas cumulative volume, the mathematical formula that calculates coke-oven gas blending flow is:
3/97Y≤X≤8/92Y
Y----blast furnace gas flow (m in formula
3/ h), X----coke-oven gas blending flow (m
3/ h).
3. the coke oven heating control method of level pressure coal gas according to claim 2 blending, is characterized in that: the mathematical formula of described calculating blast furnace gas flow is:
Q in formula
v----extrapolate the flow (m that blast furnace gas is used in coke oven heating according to coking heat consumption
3/ h);
Q
phase---the suitable thermal losses of-coking (kJ/kg);
N---the hole count of-mono-coke furnace carbonization chamber;
Q
m----coking chamber on average fills dry coal amount (kg/ hole);
The τ----coking chamber turnover time (h);
Q
high---the calorific value (kJ/m of-heating blast furnace gas
3)
K
tk
pk
change-----is respectively temperature, pressure and commutation correction coefficient.
4. the coke oven heating control method of level pressure coal gas according to claim 3 blending, is characterized in that: the mathematical formula that the set(ting)value of corresponding blast furnace gas after coke-oven gas is mixed in described calculating is:
Y in formula
1-----mixes the set(ting)value (m of corresponding blast furnace gas after coke-oven gas
3/ h);
X-----coke-oven gas blending amount (m
3/ h);
Q
high----blast furnace gas calorific value (kJ/m
3);
Q
burnt----coke-oven gas calorific value (kJ/m
3).
5. the coke oven heating control method of level pressure coal gas according to claim 4 blending, is characterized in that: the formula of mathematical of described minute flue suction force is:
P in formula
inhale----minute flue suction force (Pa)
P
if----minute flue suction force set(ting)value (Pa)
X
1----coke-oven gas blending amount per-cent (%)
The coke oven heating control method of level pressure coal gas according to claim 5 blending, is characterized in that: the formula of mathematical of the compound percentages of described coke-oven gas and blast furnace gas is
X in formula
1----coke-oven gas blending amount per-cent (%)
X----coke-oven gas blending flow (m
3/ h)
Y----blast furnace gas flow (m
3/ h).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269082.XA CN104109539B (en) | 2014-06-17 | 2014-06-17 | A kind of coke oven heating control method that level pressure coal gas blends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410269082.XA CN104109539B (en) | 2014-06-17 | 2014-06-17 | A kind of coke oven heating control method that level pressure coal gas blends |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104109539A true CN104109539A (en) | 2014-10-22 |
| CN104109539B CN104109539B (en) | 2016-07-06 |
Family
ID=51706533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410269082.XA Active CN104109539B (en) | 2014-06-17 | 2014-06-17 | A kind of coke oven heating control method that level pressure coal gas blends |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104109539B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6071685A (en) * | 1983-09-28 | 1985-04-23 | Kawasaki Steel Corp | Method for controlling combustion of fuel gas in coke oven |
| CN1062919A (en) * | 1991-01-03 | 1992-07-22 | 山西太原钢铁公司 | The method of control calorific value pressure of mixed gases |
| CN1125857A (en) * | 1995-12-14 | 1996-07-03 | 冶金工业部重庆钢铁设计研究院 | Control system for calculating coal and gas mixed thermal value and pressure |
| US20060234171A1 (en) * | 2005-04-19 | 2006-10-19 | Mitsubishi Heavy Industries, Ltd. | Fuel gas calorie control method and device |
| CN101372622A (en) * | 2007-08-20 | 2009-02-25 | 尚文彬 | Automation control method for coke oven heating |
| CN103207632A (en) * | 2012-01-13 | 2013-07-17 | 宝山钢铁股份有限公司 | Control system and control method for coal gas mixed pressure regulating |
| CN103593578A (en) * | 2013-11-27 | 2014-02-19 | 中南大学 | Flue suction force feedback setting method in coke oven heating combustion process |
-
2014
- 2014-06-17 CN CN201410269082.XA patent/CN104109539B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6071685A (en) * | 1983-09-28 | 1985-04-23 | Kawasaki Steel Corp | Method for controlling combustion of fuel gas in coke oven |
| CN1062919A (en) * | 1991-01-03 | 1992-07-22 | 山西太原钢铁公司 | The method of control calorific value pressure of mixed gases |
| CN1125857A (en) * | 1995-12-14 | 1996-07-03 | 冶金工业部重庆钢铁设计研究院 | Control system for calculating coal and gas mixed thermal value and pressure |
| US20060234171A1 (en) * | 2005-04-19 | 2006-10-19 | Mitsubishi Heavy Industries, Ltd. | Fuel gas calorie control method and device |
| CN101372622A (en) * | 2007-08-20 | 2009-02-25 | 尚文彬 | Automation control method for coke oven heating |
| CN103207632A (en) * | 2012-01-13 | 2013-07-17 | 宝山钢铁股份有限公司 | Control system and control method for coal gas mixed pressure regulating |
| CN103593578A (en) * | 2013-11-27 | 2014-02-19 | 中南大学 | Flue suction force feedback setting method in coke oven heating combustion process |
Non-Patent Citations (3)
| Title |
|---|
| 何艳丽等: "《焦炉火道温度的模糊专家控制策略及其应用》", 《山东大学学报（工学版）》 * |
| 李巨兵: "《宣钢焦炉煤气掺混加热实践》", 《河北冶金》 * |
| 郭江: "《智能控制高炉、焦炉混合煤气压力和热值》", 《新疆大学学报（理工版）》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104109539B (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017092649A1 (en) | Multifunctional tea leaf production system, multifunctional tea leaf production process, and control system | |
| CN104357065B (en) | Method for regulating and controlling temperature of coke oven | |
| CN103146407B (en) | Coking coal blending method of wide carbonization chamber coke oven | |
| CN103952529B (en) | A kind of walking beam furnace is based on thermally equilibrated optimum furnace method | |
| CN102517043A (en) | Method for heating and controlling temperature of coke oven | |
| CN102621183B (en) | Judgment method for degree of maturity of coke | |
| CN105955373A (en) | Blast furnace gas, coke oven gas and converter gas mixing control method and system | |
| CN102692124B (en) | Automatic control method for improving uniformity of temperature of sleeve kiln | |
| CN104140832A (en) | Technology for improving quality stability of coking charge coal | |
| CN104109539B (en) | A kind of coke oven heating control method that level pressure coal gas blends | |
| CN107976976B (en) | Time sequence optimization method for gas consumption equipment of iron and steel enterprise | |
| CN109251751A (en) | A kind of coke oven fire falls monitoring system | |
| CN205874470U (en) | Blast funnace hot blast stove optimal control system | |
| CN105778960B (en) | A kind of control method of the degree of shrinkage of different in moisture as-fired coal | |
| CN106873377A (en) | Coke oven heating-combustion process fire path temperature Automatic adjustment method under uncertain disturbance | |
| CN110283607B (en) | Construction and application of coking system of coking coal | |
| CN102363525B (en) | Dry material heater | |
| CN204569812U (en) | A kind of automatic-adjusting device controlling coke oven NO_x formation | |
| CN105176554B (en) | A kind of method of control plateau coking coke quality | |
| CN107992130A (en) | Coke oven furnace temperature method of adjustment | |
| CN204832906U (en) | Coke oven divides flue control system | |
| CN104267764B (en) | Coke oven standard temperature dynamic optimization method | |
| CN104099116B (en) | Improve the blending method of more than 500mm width coking chamber coke oven coke quality | |
| CN115433593B (en) | Coke oven heating method matched with fineness of coal entering furnace | |
| CN104449767A (en) | Method of improving total coke rate of heat recovery coke oven |
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 |