CN203330389U - Heat accumulating type steel ladle baking system capable of obviously reducing NOX - Google Patents
Heat accumulating type steel ladle baking system capable of obviously reducing NOX Download PDFInfo
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- CN203330389U CN203330389U CN2013203821608U CN201320382160U CN203330389U CN 203330389 U CN203330389 U CN 203330389U CN 2013203821608 U CN2013203821608 U CN 2013203821608U CN 201320382160 U CN201320382160 U CN 201320382160U CN 203330389 U CN203330389 U CN 203330389U
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Abstract
The utility model provides a heat accumulating type steel ladle baking system capable of obviously reducing NOX. The heat accumulating type steel ladle baking system capable of obviously reducing the NOX comprises a steel ladle, at least two burners, a fuel gas subsystem, a combustion-supporting air system, a smoke discharge subsystem, an empty fuel gas reversing valve and a control subsystem, wherein a heat accumulator, at least one heavy combustion nozzle and at least one light combustion nozzle are arranged in each burner. When baking is conducted, heavy combustion is conducted through fuel gas sprayed out of the heavy combustion nozzles, and light combustion is conducted through fuel gas sprayed out of the light combustion nozzles at the same time. Compared with the prior art, the heat accumulating type steel ladle baking system has the advantages that the heat accumulating type combustion is combined with the heavy combustion and the light combustion, therefore, the temperature inside a furnace is quite even, NOX pollutants are prevented from being produced, the maximum reduction amount can be more than 70%, and the problem of heavy pollution caused by combustion is thoroughly solved through the combustion method.
Description
Technical field
The utility model relates to the technical field of ladle baking, particularly a kind of the heat storage type combustion mode is combined with Concentration-decentration Split Combustion, can save energy, and can significantly reduce NO
xthe Regenerative Ladle Baking system.
Background technology
At present, ladle baking generally adopts regenerative combustion system, and the thermal efficiency of this combustion system is high, can save the energy, but has NO
xpollutant discharge amount is large, with serious pollution defect.
Thermal NO according to Zdldovich Frank-Kamenetskii relation
xgenerative theory, NO
xgrowing amount main relevant with ignition temperature, and exponent function relation basically.According to this principle, if will reduce NO
xgrowing amount, will reduce ignition temperature, and the combustion system of existing heat accumulating type can be preheating to respectively 1000 ℃ by combustion gas and air.Generally, the air of fuel, the preheat temperature of combustion gas improve, and its theoretical temperature combustion also improves, thereby causes NO
xgrowing amount large.
The utility model content
The utility model purpose is to provide a kind of can significantly reduce NO
xthe Regenerative Ladle Baking system, to solve the NO of regenerative combustion system of the prior art
xpollutant discharge amount is large, causes with serious pollution technical matters.
The utility model purpose is achieved through the following technical solutions:
A kind ofly can significantly reduce NO
xthe Regenerative Ladle Baking system, comprise ladle, at least two burners, combustion gas subsystem, combustion-supporting wind system, smoke evacuation subsystem, empty combustion gas reversal valve and RACSs, described burner is arranged on the clad of described ladle, described empty combustion gas reversal valve is connected with described RACS with described burner, described combustion gas subsystem, described combustion-supporting wind system, described smoke evacuation subsystem respectively, is provided with heat storage, at least one dense burning spout and at least one light burning spout in described burner; During baking, from the combustion gas of dense burning spout ejection, carry out dense burning, simultaneously, from the combustion gas of light burning spout ejection, carry out light burning.
Preferably, described dense burning spout is a plurality of, and described light burning spout is a plurality of.
Preferably, described a plurality of dense burning spouts are arranged on same level, and described a plurality of light burning spouts are arranged on same level.
Preferably, described light burning spout is close to the more described dense burning spout of the air port of described burner, and described dense burning spout is arranged on the below of described light burning spout.
Preferably, the primary air ratio of the combustion gas of described dense burning spout ejection is less than 1.0, and the primary air ratio of the combustion gas of described light burning spout ejection is greater than 1.0.
Compared with prior art, the utility model has following beneficial effect:
1, the utility model combines the heat storage type combustion mode with Concentration-decentration Split Combustion, allow air and combustion gas spray into respectively burner hearth by spout separated by a distance, the oxidation reaction of fuel and air spreads all over whole burner hearth, the visible flame that does not have the traditional combustion mode to have and its distinctive high-temperature region, make the interior temperature of whole stove very even, suppressed NO
xthe generation of pollutant, maximum reduction amount can reach more than 70%, and this combustion system has thoroughly solved the high pollution problem that burning causes;
2, ladle preheating system of the present utility model can make furnace temperature even, and eliminates localized hyperthermia, thereby has improved heating process, can extend the service life of ladle and burner;
3, the utility model adopts heat storage type combustion can greatly reduce exhaust gas temperature, by original being reduced to more than 1000 ℃ below 150 ℃, and can fully reclaim heat, and improve and produce and surrounding enviroment, reduced the thermal loss of flue gas, reduce productive labor intensity, and improved the combustion rate of burning, extended the service life of other equipment;
4, ladle preheating system of the present utility model combines heat storage type combustion with Concentration-decentration Split Combustion, first by air, combustion gas are two be preheating to the high temperature that approaches fire box temperature after, then spray in burner hearth and carry out bias combustion, can under hypoxemia, burn rapidly, reaction spreads all over whole burner hearth, there is no the localized hyperthermia district, the ladle quick heating, can save the natural gas resource in a large number, reduced cost, exhaust gas temperature has reduced by 900 ℃ of left and right, presses the heater EQUILIBRIUM CALCULATION FOR PROCESS, at least can save 40% fuel.
The accompanying drawing explanation
The principle schematic that Fig. 1 is ladle preheating system of the present utility model;
The part-structure schematic diagram that Fig. 2 is burner of the present utility model.
The specific embodiment
The combustion system that the utility model adopts heat storage type combustion to combine with Concentration-decentration Split Combustion, it is saved the energy and reduces NO
xthe principle of discharge capacity is as follows.
With regard to the heat storage type combustion mode, in stove, temperature is very even, fuel combustion is abundant, can greatly reduce exhaust gas temperature, by original being reduced to more than 1000 ℃ below 150 ℃, fully reclaim heat, and improve and produce and surrounding enviroment, reduce the thermal loss of flue gas, and improve the combustion rate of burning, can save the energy, also can extend the service life of ladle.
With regard to Concentration-decentration Split Combustion, it reduces NO by reducing ignition temperature
xgrowing amount, thereby reduce NO
xdischarge capacity.It reduces the reason of ignition temperature from two aspects: being that excess air plays diluting effect on the one hand, is that the flue gas that light flame combustion produces has reducing effect to dense flame temperature on the other hand.Flame temperature after burning depends on calorific value and the exhaust gas volumn of combustion gas.Under exchangeability and the constant prerequisite of supply, ignition temperature and exhaust gas volumn are inversely proportional to, and exhaust gas volumn is identical with the excess air variation tendency, and therefore, ignition temperature is contrary with the excess air variation tendency.For coal gas, when air coefficient increases to 1.8 from 1.0, its ignition temperature will drop to 1173K from 2316K, reduce closely 50%, and so significantly temperature reduces reducing NO
xthe impact of growing amount is huge.Particularly when temperature during lower than 1700K, NO
xit is very little that growing amount becomes.For light flame, its air capacity has surpassed theoretical air requirement, and air coefficient tends to reach 1.8 left and right, and ignition temperature at this moment is generally at 1200K left and right, NO
xbe effectively controlled.Light flame is a kind of full premix combustion mode, dense flame is longer than full premix combustion flame, simultaneously due to for each dense flame, the flue gas that light flame combustion generates, just caused auxiliary air in combustion process not obtain rapidly, it is longer that flame becomes, flame elongates and has extended the burning heat release time, has slowed down heating speed, and flame temperature is descended, make ignition temperature reduce, thereby reduce NO
xgrowing amount.
Below in conjunction with accompanying drawing, describe the utility model in detail.
Refer to Fig. 1,2, of the present utility modelly can significantly reduce NO
xthe Regenerative Ladle Baking system, comprise ladle 1, at least two burners 4, combustion gas subsystem 5, combustion-supporting wind system 7, smoke evacuation subsystem 6, empty combustion gas reversal valve 8 and RACS (not shown).In this example, two burners 4 are arranged on the clad 2 of ladle 1, and empty combustion gas reversal valve 8 is connected with burner 4, combustion gas subsystem 5, combustion-supporting wind system 7 and smoke evacuation subsystem 6 respectively by pipeline.Be provided with heat storage 3, at least one dense burning spout 43 and at least one light burning spout 42 in burner 4; During baking, from the combustion gas of dense burning spout 43 ejections, carry out dense burning, simultaneously, from the combustion gas of light burning spout 42 ejections, carry out light burning.The controlled end of empty combustion gas reversal valve is connected with the output of RACS, empty combustion gas reversal valve makes two burner sequence alternate ground on clad be connected with air inlet system under the control of RACS, and controls the duty of two burners by empty combustion gas reversal valve.When the burner in left side during in fired state, the air heat storage of the burner on right side is in the accumulation of heat state, after empty combustion gas reversal valve commutation, can change the duty of two burners, the left side burner air heat storage place's accumulation of heat state the time, the burner place fired state on right side, by the continuous switch operating state of exchange system, the burner of the left and right sides can pass to the heat in the flue gas of accumulating combustion air and combustion gas.
In this example, dense burning spout 43 is a plurality of, and light burning spout 42 is a plurality of.A plurality of dense burning spouts 43 are arranged on same level, and a plurality of light burning spouts 42 are arranged on same level.Light burning spout 42 is close to the denseer burning spout 43 of air port 41 of burner, and dense burning spout 43 is arranged on the below of light burning spout 42.Wherein, the primary air ratio of the combustion gas of dense burning spout 43 ejections is less than 1.0, and the primary air ratio of the combustion gas of light burning spout 42 ejections is greater than 1.0.
The utility model also provides above-mentioned can significantly reduce NO
xthe baking method of Regenerative Ladle Baking system, comprise the following steps:
(1) air, the combustion gas from combustion-supporting wind system and combustion gas subsystem enters in the first burner by empty combustion gas reversal valve respectively, after the heat storage in the first burner carries out preheating, combustion gas sprays through light burning spout with certain speed, entrainment a large amount of combustion airs and enter mixed zone, be mixed to form the primary air fuel gas mixture, and enter combustion zone and burn and form light flame combustion 12 in the full premix combustion mode; Simultaneously, from a certain amount of air of empty combustion gas reversal valve, behind mixed zone, dense flame combustion 11 is carried out in the combustion gas that enters combustion zone and become auxiliary air and the ejection of dense burning spout; Simultaneously, the high-temperature flue gas 13 of generation is discharged from the second burner, and the heat storage in the second burner absorbs the heat in high-temperature flue gas, with the heat reclaimed in high-temperature flue gas, also reduces the temperature of the flue gas of discharging;
After heat storage in (2) second burners is fully heated, RACS is controlled empty combustion gas reversal valve is automatically commutated sky combustion gas reversal valve, air, combustion gas from combustion-supporting wind system and combustion gas subsystem enter in the second burner by empty combustion gas reversal valve respectively, after the heat storage in the second burner carries out preheating, combustion gas sprays through light burning spout with certain speed, entrainment a large amount of combustion airs and enter mixed zone, be mixed to form the primary air fuel gas mixture, and enter combustion zone and burn and form light flame combustion 12 in the full premix combustion mode; Simultaneously, from a certain amount of air of empty combustion gas reversal valve, behind mixed zone, dense flame combustion 11 is carried out in the combustion gas that enters combustion zone and become auxiliary air and the ejection of dense burning spout; Simultaneously, the high-temperature flue gas 13 of generation is discharged from the first burner, and the heat storage in the first burner absorbs the heat in high-temperature flue gas, with the heat reclaimed in high-temperature flue gas, also reduces the temperature of the flue gas of discharging.
In this example, dense burning spout 43 is a plurality of, and light burning spout 42 is a plurality of.A plurality of dense burning spouts 43 are arranged on same level, and a plurality of light burning spouts 42 are arranged on same level.Light burning spout 42 is close to the denseer burning spout 43 of air port 41 of burner, and dense burning spout 43 is arranged on the below of light burning spout 42.Wherein, the primary air ratio of the combustion gas of dense burning spout 43 ejections is less than 1.0, and the primary air ratio of the combustion gas of light burning spout 42 ejections is greater than 1.0.
The utility model combines the heat storage type combustion mode with Concentration-decentration Split Combustion, allow air and combustion gas spray into respectively burner hearth by spout separated by a distance, the oxidation reaction of fuel and air spreads all over whole burner hearth, the visible flame that does not have the traditional combustion mode to have and its distinctive high-temperature region, make the interior temperature of whole stove very even, suppressed NO
xthe generation of pollutant, maximum reduction amount can reach more than 70%, and this combustion system has thoroughly solved the high pollution problem that burning causes.Ladle preheating system of the present utility model can make furnace temperature even, and eliminates localized hyperthermia, thereby has improved heating process, can extend the service life of ladle and burner.The utility model adopts heat storage type combustion can greatly reduce exhaust gas temperature, by original being reduced to more than 1000 ℃ below 150 ℃, and can fully reclaim heat, and improve and produce and surrounding enviroment, reduced the thermal loss of flue gas, reduce productive labor intensity, and improved the combustion rate of burning, extended the service life of other equipment.Ladle preheating system of the present utility model combines heat storage type combustion with Concentration-decentration Split Combustion, first by air, combustion gas are two be preheating to the high temperature that approaches fire box temperature after, then spray in burner hearth and carry out bias combustion, can under hypoxemia, burn rapidly, reaction spreads all over whole burner hearth, there is no the localized hyperthermia district, the ladle quick heating, can save the natural gas resource in a large number, reduced cost, exhaust gas temperature has reduced by 900 ℃ of left and right, presses the heater EQUILIBRIUM CALCULATION FOR PROCESS, at least can save 40% fuel.
Above disclosed be only several specific embodiments of the application, but the application is not limited thereto, the changes that any person skilled in the art can think of, all should drop in the application's protection domain.
Claims (5)
1. one kind can significantly be reduced NO
xthe Regenerative Ladle Baking system, it is characterized in that, comprise ladle, at least two burners, combustion gas subsystem, combustion-supporting wind system, smoke evacuation subsystem, empty combustion gas reversal valve and RACSs, described burner is arranged on the clad of described ladle, described empty combustion gas reversal valve is connected with described RACS with described burner, described combustion gas subsystem, described combustion-supporting wind system, described smoke evacuation subsystem respectively, is provided with heat storage, at least one dense burning spout and at least one light burning spout in described burner; During baking, from the combustion gas of dense burning spout ejection, carry out dense burning, simultaneously, from the combustion gas of light burning spout ejection, carry out light burning.
2. as claimed in claim 1ly can significantly reduce NO
xthe Regenerative Ladle Baking system, it is characterized in that, described dense burning spout is a plurality of, described light burning spout is a plurality of.
3. as claimed in claim 2ly can significantly reduce NO
xthe Regenerative Ladle Baking system, it is characterized in that, described a plurality of dense burning spouts are arranged on same level, described a plurality of light burning spouts are arranged on same level.
4. as describedly as any one in claim 1-3 can significantly reduce NO
xthe Regenerative Ladle Baking system, it is characterized in that, described light burning spout is close to the more described dense burning spout of the air port of described burner, described dense burning spout is arranged on the below of described light burning spout.
5. as claimed in claim 1ly can significantly reduce NO
xthe Regenerative Ladle Baking system, it is characterized in that, the primary air ratio of the combustion gas of described dense burning spout ejection is less than 1.0, the primary air ratio of the combustion gas of described light burning spout ejection is greater than 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203821608U CN203330389U (en) | 2013-06-28 | 2013-06-28 | Heat accumulating type steel ladle baking system capable of obviously reducing NOX |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203821608U CN203330389U (en) | 2013-06-28 | 2013-06-28 | Heat accumulating type steel ladle baking system capable of obviously reducing NOX |
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| Publication Number | Publication Date |
|---|---|
| CN203330389U true CN203330389U (en) | 2013-12-11 |
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ID=49699089
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203821608U Expired - Lifetime CN203330389U (en) | 2013-06-28 | 2013-06-28 | Heat accumulating type steel ladle baking system capable of obviously reducing NOX |
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| CN (1) | CN203330389U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350220A (en) * | 2013-06-28 | 2013-10-16 | 上海宝钢节能技术有限公司 | Heat accumulating type steel ladle baking system capable of remarkably reducing NOX (nitrogen oxide) and baking method |
-
2013
- 2013-06-28 CN CN2013203821608U patent/CN203330389U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103350220A (en) * | 2013-06-28 | 2013-10-16 | 上海宝钢节能技术有限公司 | Heat accumulating type steel ladle baking system capable of remarkably reducing NOX (nitrogen oxide) and baking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI BAOSTEEL ENERGY-SAVING + ENVIRONMENTAL-PR Free format text: FORMER NAME: SHANGHAI BAOSTEEL ENERGY TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201999 Baoshan District, G Road, Lane No. 550, No. 7, business building, floor 2, level 3, level Patentee after: SHANGHAI BAOSTEEL ENERGY TECH Co.,Ltd. Address before: 201999, room 1813, 3245 Mudanjiang Road, Shanghai, Baoshan District Patentee before: Baosteel Energy Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |