CN108165324A - The method that mixed gas calorific value automatic mixing is realized under complex working condition - Google Patents
The method that mixed gas calorific value automatic mixing is realized under complex working condition Download PDFInfo
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- CN108165324A CN108165324A CN201711496864.7A CN201711496864A CN108165324A CN 108165324 A CN108165324 A CN 108165324A CN 201711496864 A CN201711496864 A CN 201711496864A CN 108165324 A CN108165324 A CN 108165324A
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- valve
- gas
- calorific value
- burnt
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
- C10K3/06—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by mixing with gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
Abstract
The invention discloses a kind of methods that mixed gas calorific value automatic mixing is realized under complex working condition, include the following steps：1st, stablize and enter factory's high air pressure in 5.5 ± 0.5Kpa；2nd, 1 online calorific value detector is installed on blast furnace gas supervisor, is detected in real time into factory blast furnace gas calorific value Q2；3rd, stablize and enter the high gas of factory；4th, mathematical model is worked out according to principle：The stoichiometric factor Rb of COG=（Target calorific value Q3BFG calorific values Q1）/（COG calorific values Q2BFG calorific values Q1）；COG amount of allocating=BFG amount of allocating × Rb/ (1 Rb)；5th, high, burnt gas first valve A1, A2 need to be with subsequent road valve events, and aperture 3%, time interval >=5S of repetitive operation can only be increased and decreased every time by intervening it setting；6th, when high gas main valve is in auto state, it is intervened；Avoid its mutual disturbance between four butterfly valves；7th, when wind turbine and four butterfly valves are in auto state, it is intervened, burnt air valve door restrictor minimum aperture is 5%.
Description
Technical field
The present invention relates to a kind of methods that mixed gas calorific value automatic mixing is realized under complex working condition.
Background technology
Eight steel gas mixing systems use pressing technology after first mixing, and 3 mixing pressurizing points are relatively independent and phase
It connects to form unified calorific value, pressure supply, the mixing total amount fluctuation frequency and range are all higher than first pressurizeing mixes single station supply afterwards
Compression system.
The four kinds of differences for turning gas, melting and reducing blast furnace for turning gas, 150t of high gas, 120t and 40t from new district blast furnace
The coal gas of calorific value is summarized to DN1800 blast furnace gas main pipes with to be not easy to grope the ratio estimated and frequently changed and enters mixing pressurization
It stands.Meanwhile pressure, pipe process and the spy of the intermittent recycling of coal gas of converter in blast furnace, melting and reducing blast furnace production process
Property, cast the unstability into gas mixing system gas, usual old area DN800mm, 1200mm coke-stove gas supervisor pressure
Power 6~7kPa, new district DN1600mm coke-stove gas main pipe pressure 6~7.5kPa, enter factory's blast furnace gas main pipe pressure 7~
11kPa is fluctuated, and enters the high gas calorific value of factory in 750~1750kcal/m3Fluctuation.
In addition, four butterfly valves are during frequent movement before the station now used, motion tracking speed is slow, response lag, and easily
Bite, the protection of motor drive mechanism stop jumping, four butterfly valves cannot be acted normally in tracking.
Pressing technology is limited by the limitation of above-mentioned factor after the first mixing of eight steel, and previous calorific value automatic mixing, which is adjusted, is difficult
It maintains, frequently unlocks saltus step to adjust manually, and intensive manual adjusting operation personnel labor intensity is big, easily leads to maloperation,
Calorific value stability is poor.
In day-to-day operation, mixed gas user substantially increase and decrease amount causes pressure fluctuation before machine, high, the burnt gas of supplying to be matched
It is outer to be fluctuated for mixed gas calorific value than changing；High gas calorific value into mixing pressurizing point fluctuates, and causes outer for mixed gas
Hot-restriking die.When finding to fluctuate fluctuation, first pass through to adjust and controlled into high, the burnt gas main valve of factory into factory is high, burnt manifold pressure,
It is finely tuned again by four butterfly valves singly stood, adjusts process tedious and lag.
Invention content
The purpose of the present invention is to provide a kind of methods that mixed gas calorific value automatic mixing is realized under complex working condition, reduce
Labor intensity improves production efficiency.
The object of the present invention is achieved like this, and the side of mixed gas calorific value automatic mixing is realized under a kind of complex working condition
Method includes the following steps：1st, the upper two regulating valves realization of blast furnace gas supervisor is automatically adjusted into hybrid station height before hybrid station is transformed
Atmospheric pressure is stablized and enters factory's high air pressure in 5.5 ± 0.5Kpa；2nd, on the new district blast furnace gas supervisor before gas chamber area hybrid station
1 online calorific value detector is installed, is detected in real time into factory blast furnace gas calorific value Q2；3rd, stablize and enter the high gas of factory, according to being set before machine
Pressure value, pressure before two butterfly valve control machine of B1 valves and A1 valves, program are set according to the flow and calorific value of high gas, burnt gas and Mixture Density Networks
Determine calorific value, calculate the burnt tolerance of supplying, two butterfly valve of B2 and A2 cokes gas controls to adjust burnt gas proportioning, and is repaiied according to burnt gas value is calculated
Just；4th, mathematical model is worked out according to principle：The stoichiometric factor Rb of COG=（Target calorific value Q3- BFG calorific values Q1）/（COG calorific values Q2-
BFG calorific values Q1）；COG amount of allocating=BFG amount of allocating × Rb/ (1-Rb)；5th, it is the stability of guarantee system, guarantee is supplied out appropriate
The fluid of flow pressure, high, coke gas first valve A1, A2 need to should avoid first of valve from opening greatly with subsequent road valve event
Degree acts, again the frequency of control valve action, and aperture 3% can only be increased and decreased every time by intervening it setting, between the time of repetitive operation
Every >=5S；In addition by comparing aperture and the amendment of first of Fa Hehou roads valve automatically so that road after first valve aperture ＞
Valve opening is simultaneously maintained in the range of 5%-15%；6th, it is to avoid the mutual disturbances of high gas manifold valves and four butterfly valves, when high gas
When main valve is in auto state, it is intervened：When high gas is responsible for actual pressure in desired value ± 8% range, valve is in
Non-action state；Limit the minimum aperture of auto state lower valve, you can ensure that valve does not occur small guide vane state, and can avoid
Its mutual disturbance between four butterfly valves；7th, to avoid the mutual disturbance between four butterfly valves and wind turbine, four butterfly valves, when wind turbine and four
When butterfly valve is in auto state, it is intervened：When being responsible for actual pressure in desired value ± 10% range before machine, high gas B1
Valve is in non-action state；When burnt throughput actual value is in desired value ± 8% range, burnt gas B2 valves are in shape of being failure to actuate
State, for burnt air valve is avoided fully closed phenomenon occur, burnt air valve door restrictor minimum aperture is 5%.
The advantages of this realization mixed gas calorific value automatic mixing, raising mixed gas calorific value coefficient of stabilization method：
1st, device is simple and practicable to carry out online, and transformation is conveniently easily achieved, it can be achieved that calorific value stabilization automatic mixing, is easy to grasp
Make, it is highly practical, compensate in the automatic adjustment of general calorific value because enter high factory, coke atmospheric pressure and calorific value fluctuation bring it is automatic
Adjusting qualification rate is low, is forced the technical barriers such as unlock manual operation.Consistently online automatic adjustment proportioning, calorific value coefficient of stabilization can be achieved
Height reduces personnel labor intensity, and mixed gas under complex working condition calorific value automatic mixing is realized for the first time in steel industry.
2nd, easily operated, highly practical, transformation is conveniently easily achieved, and can be adjusted accordingly according to actual condition, very
Big degree by operating personnel from it is intensive it is manual adjust in liberate, improve coefficient of stabilization, be easy to by calorific value control require ±
100kcal/m3In the range of.
3rd, there is broad applicability.It first mixes and pressurizes afterwards, can stablize use, and be first in the later mixing system that first pressurizes
Compression system consistently online is run after secondary first mixing that can be under complex working condition, and hot-restriking die range maintains substantially after putting into operation
In ± 100kcal/m3In the range of, qualification rate reduces security risk, energy that hot-restriking die brings heating furnace up to more than 90%
Source wastes and the quality of stocking influences, and maloperation caused by avoiding intensive manual operation reduces system safety hazards.
Specific embodiment
A kind of method that mixed gas calorific value automatic mixing is realized under complex working condition, includes the following steps：1st, transformation mixing
Blast furnace gas is responsible for upper two regulating valves realization and is automatically adjusted into hybrid station high air pressure before standing, and stabilization enters factory's high air pressure and exists
5.5±0.5Kpa；2nd, 1 online calorific value detector is installed on the new district blast furnace gas supervisor before gas chamber area hybrid station, it is real
When detect into factory blast furnace gas calorific value Q2；3rd, stablize and enter the high gas of factory, according to setup pressure value before machine, the two butterfly valve control of B1 valves and A1 valves
Pressure before machine processed, setting calorific value of the program according to the flow and calorific value of high gas, burnt gas and Mixture Density Networks calculate the burnt tolerance of supplying,
Two butterfly valve of B2 and A2 cokes gas controls to adjust burnt gas proportioning, and according to the burnt gas value amendment of calculating；
4th, mathematical model is worked out according to principle：The stoichiometric factor Rb of COG=（Target calorific value Q3- BFG calorific values Q1）/（COG calorific values Q2-
BFG calorific values Q1）；COG amount of allocating=BFG amount of allocating × Rb/ (1-Rb)；5th, it is the stability of guarantee system, guarantee is supplied out appropriate
The fluid of flow pressure, high, coke gas first valve A1, A2 need to should avoid first of valve from opening greatly with subsequent road valve event
Degree acts, again the frequency of control valve action, and aperture 3% can only be increased and decreased every time by intervening it setting, between the time of repetitive operation
Every >=5S；In addition by comparing aperture and the amendment of first of Fa Hehou roads valve automatically so that road after first valve aperture ＞
Valve opening is simultaneously maintained in the range of 5%-15%；6th, it is to avoid the mutual disturbances of high gas manifold valves and four butterfly valves, when high gas
When main valve is in auto state, it is intervened：When high gas is responsible for actual pressure in desired value ± 8% range, valve is in
Non-action state；Limit the minimum aperture of auto state lower valve, you can ensure that valve does not occur small guide vane state, and can avoid
Its mutual disturbance between four butterfly valves；7th, to avoid the mutual disturbance between four butterfly valves and wind turbine, four butterfly valves, when wind turbine and four
When butterfly valve is in auto state, it is intervened：When being responsible for actual pressure in desired value ± 10% range before machine, high gas B1
Valve is in non-action state；When burnt throughput actual value is in desired value ± 8% range, burnt gas B2 valves are in shape of being failure to actuate
State, for burnt air valve is avoided fully closed phenomenon occur, burnt air valve door restrictor minimum aperture is 5%.
Claims (1)
1. the method for mixed gas calorific value automatic mixing is realized under a kind of complex working condition, it is characterised in that include the following steps：1、
Blast furnace gas is responsible for upper two regulating valves realization and is automatically adjusted into hybrid station high air pressure before transformation hybrid station, stablizes and enters the high gas of factory
Pressure is in 5.5 ± 0.5Kpa；2nd, the online calorific value detection of installation 1 on the new district blast furnace gas supervisor before gas chamber area hybrid station
Instrument is detected in real time into factory blast furnace gas calorific value Q2；3rd, stablize and enter the high gas of factory, according to setup pressure value before machine, B1 valves and A1 valves two
Pressure before butterfly valve control machine, setting calorific value of the program according to the flow and calorific value of high gas, burnt gas and Mixture Density Networks calculate the coke of supplying
Tolerance, two butterfly valve of B2 and A2 cokes gas control to adjust burnt gas proportioning, and according to the burnt gas value amendment of calculating；
4th, mathematical model is worked out according to principle：The stoichiometric factor Rb of COG=（Target calorific value Q3- BFG calorific values Q1）/（COG calorific values Q2-
BFG calorific values Q1）；COG amount of allocating=BFG amount of allocating × Rb/ (1-Rb)；5th, it is the stability of guarantee system, guarantee is supplied out appropriate
The fluid of flow pressure, high, coke gas first valve A1, A2 need to should avoid first of valve from opening greatly with subsequent road valve event
Degree acts, again the frequency of control valve action, and aperture 3% can only be increased and decreased every time by intervening it setting, between the time of repetitive operation
Every >=5S；In addition by comparing aperture and the amendment of first of Fa Hehou roads valve automatically so that road after first valve aperture ＞
Valve opening is simultaneously maintained in the range of 5%-15%；6th, it is to avoid the mutual disturbances of high gas manifold valves and four butterfly valves, when high gas
When main valve is in auto state, it is intervened：When high gas is responsible for actual pressure in desired value ± 8% range, valve is in
Non-action state；Limit the minimum aperture of auto state lower valve, you can ensure that valve does not occur small guide vane state, and can avoid
Its mutual disturbance between four butterfly valves；7th, to avoid the mutual disturbance between four butterfly valves and wind turbine, four butterfly valves, when wind turbine and four
When butterfly valve is in auto state, it is intervened：When being responsible for actual pressure in desired value ± 10% range before machine, high gas B1
Valve is in non-action state；When burnt throughput actual value is in desired value ± 8% range, burnt gas B2 valves are in shape of being failure to actuate
State, for burnt air valve is avoided fully closed phenomenon occur, burnt air valve door restrictor minimum aperture is 5%.
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| CN201711496864.7A CN108165324A (en) | 2017-12-31 | 2017-12-31 | The method that mixed gas calorific value automatic mixing is realized under complex working condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444326A (en) * | 2019-08-27 | 2021-03-05 | 宝山钢铁股份有限公司 | Method for calculating heat value of mixed gas |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1779326A (en) * | 2004-11-26 | 2006-05-31 | 济南钢铁股份有限公司 | Heat value stabilizing control system of mixed gas and computer-controlled model |
| CN101286042A (en) * | 2008-05-20 | 2008-10-15 | 重庆钢铁(集团)有限责任公司 | Mixed gas thermal value control system and method |
| CN101713010A (en) * | 2009-11-17 | 2010-05-26 | 邯钢集团邯宝钢铁有限公司 | Method for reclaiming coal gas of converter through guidance of mathematical model |
-
2017
- 2017-12-31 CN CN201711496864.7A patent/CN108165324A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN1779326A (en) * | 2004-11-26 | 2006-05-31 | 济南钢铁股份有限公司 | Heat value stabilizing control system of mixed gas and computer-controlled model |
| CN101286042A (en) * | 2008-05-20 | 2008-10-15 | 重庆钢铁(集团)有限责任公司 | Mixed gas thermal value control system and method |
| CN101713010A (en) * | 2009-11-17 | 2010-05-26 | 邯钢集团邯宝钢铁有限公司 | Method for reclaiming coal gas of converter through guidance of mathematical model |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444326A (en) * | 2019-08-27 | 2021-03-05 | 宝山钢铁股份有限公司 | Method for calculating heat value of mixed gas |
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