CN2411454Y - Direct-burning-type blast-heating cupola - Google Patents
Direct-burning-type blast-heating cupola Download PDFInfo
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- CN2411454Y CN2411454Y CN 00201203 CN00201203U CN2411454Y CN 2411454 Y CN2411454 Y CN 2411454Y CN 00201203 CN00201203 CN 00201203 CN 00201203 U CN00201203 U CN 00201203U CN 2411454 Y CN2411454 Y CN 2411454Y
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Abstract
The utility model relates to a direct-burning-type hot blast cupola, which comprises a spark arrester, a preheating section, a chimney heat exchanger, a burning heat exchanger, a hot blast pipeline, a stock gas exhausting opening, etc. The bottom part of the chimney heat exchanger is connected to the upper part of the burning heat exchanger, and the top part is connected to the bottom part of the spark arrester. The upper end of the hot blast pipeline is connected to the lower part of the burning heat exchanger, and the lower end is connected to the upper part of a bellow section. The stock gas exhausting opening is connected to the upper part of the preheating section, and the bellows section is connected to the lower part of the preheating section. A charging opening is arranged at the upper part of the preheating section and is arranged in the opposite direction with the stock gas exhausting opening. The burning heat exchanger is arranged above the charging opening, and the burning heat exchanger is tightly combined with the charging opening. Because of the mutual promotion of coke burning and stock gas burning, the burning temperature is more and more high.
Description
The utility model relates to the smelting of a kind of iron or steel, and particularly relating to a kind of is the direct-combustion hot air cupola furnace that fuel carries out the pig iron and iron casting production with the coke.
In Foundry Production, common furnace cupola is that the pig iron is molten into iron liquid to produce a kind of Special Equipment of ironcasting.At present, the ironcasting more than 90% is produced by the furnace cupola remelting pig iron.The production route of most foundry goods is: the iron ore → blast furnace → pig iron → furnace cupola → ironcasting, and will be from the iron ore to the foundry goods through twice pyroprocess.In general furnace cupola, the process heat that cast iron smelting uses accounts for the coke burning and emits the 55%-60% of total amount of heat, and the physics heat that furnace gas is taken away accounts for 5%-8%, and the chemical heat that furnace gas is taken away accounts for 30%-35%.
Owing to lack suitable burner gas residual heat recovery technology, domestic most of furnace cupola does not reclaim burner gas residual heat at present, and number is lost in vain in a large amount of energy of megawatt.Domestic most of furnace cupola ratio of combustion generally is controlled at 50%-70%, and oxidizing atmosphere is stronger in the stove, a large amount of scaling loss of metallic element.Utilize the local general physics heat that adopts in the hot-blast stove chamber technology recovery furnace gas of burner gas residual heat more at home, but the hot-blast stove chamber technology reclaims the heat in the furnace gas, the hot blast temperature that obtains is about about 200 ℃, hot blast temperature is low, melting conditions, the hot benefit of raising of improving furnace cupola had little significance, and the hot-blast stove chamber life-span only is 1500-3000 hour simultaneously.Therefore there is very big defective in hot-blast stove courage heat recovery technology.
The external stove external hot air technology of using, can comprehensively reclaim chemical heat and physics heat in the furnace gas, but the outer technology of stove needs the furnace cupola furnace gas is guided to below charge door the burner that is arranged on ground, the heat exchanger, the furnace gas heat recovery system complex structure that constitutes, floor space is big, because pipeline is long, cooling surface area is bigger, the efficient that burner gas residual heat reclaims is not high simultaneously.There is significant limitation equally in the system cost height.
Be oxidizing atmosphere in the furnace cupola stove, the iron in the iron ore can not be restored, thereby can not use iron ore masonry furnace charge to produce ironcasting.Simultaneously, millions of ton of ferrous waste of the annual generation of steel and iron industry, as steel scrap, iron scale skin, slag iron, assorted iron etc., these oxides-containing iron waste materials are generally because of its degree of oxidation height, can't use as cupola charge, wherein major part has caused pollution to environment.Therefore we can say, the limitation of common furnace cupola is: can only use blase furnace cast iron to be furnace charge, can not directly use iron ore to be furnace charge, cause a large amount of consumption of the energy and the raising of casting cost, can not use steel and iron industry oxides-containing iron waste material to make furnace charge and produce foundry goods.
In metallurgy industry, the blast furnace Deoxidation Atmosphere in Furnace is very strong, is the Special Equipment that the smelt iron ore obtains the pig iron, and it is pourable ironcasting that the molten iron of its production adjusts slightly.But the limitation that blast furnace exists is: build that inhomogeneities, complex structure, construction cost height, floor space that the area distributes are big, the working system of long-time continuous etc., in addition, the iron(-)coke ratio of blast furnace is very low, is about about 2.These problems have limited with the reality of blast-melted direct cast ironcasting and possibility economically.
Because the defective of above-mentioned existing existence, the design people actively study innovation based on abundant practical experience and professional knowledge, through constantly studying, design, and after studying sample and improvement repeatedly, creates the utility model finally.
Main purpose of the present utility model is, overcome the defective that existing furnace cupola exists, and provide a kind of direct-combustion hot air cupola furnace of new structure, make its limitation that can overcome hot-blast stove chamber and stove external hot air technology, make it under higher iron(-)coke ratio situation, have very strong reducing atmosphere in the stove, can comprehensively reclaim chemical heat and physics heat in the furnace gas, can improve metallurgical performance, can be furnace charge with iron ore and steel and iron industry waste material, produces ironcasting economically.
The purpose of this utility model is realized by following technical scheme.According to the direct-combustion hot air cupola furnace that the utility model proposes, it includes spark catcher, preheating section, bellows section, charge door, hot air duct, burner hearth, cooling blower, blowing line, forehearth, charger, charging scffold, it is characterized in that also comprising: the chimney heat exchanger, combustion heat-exchange device, hot air duct, furnace gas outlet, wherein: this chimney heat exchanger, device for the preheating air blast, its bottom is connected the top of the combustion heat-exchange device that the preheating air blast enters through pre-warm-air pipe road, and the top is connected in the bottom of spark catcher; This hot air duct, its upper end connects the bottom that is arranged on the combustion heat-exchange device, and its lower end connects the top that is arranged on the bellows section; This furnace gas outlet connects the top that is arranged on preheating section; This bellows section, the bellows section for combustion heat-exchange device heating air blast enters through hot air duct connects the bottom that is arranged on preheating section; Charge door, the top and the furnace gas outlet that are arranged on preheating section 7 are the relative direction setting.
The purpose of this utility model can also further realize by following technical measures.
Aforesaid direct-combustion hot air cupola furnace, wherein said combustion heat-exchange device all is arranged on the top of charge door, and combustion heat-exchange device and charge door are closely linked.
Aforesaid direct-combustion hot air cupola furnace, the shell of wherein said combustion heat-exchange device is made up of upper cone, combustion heat-exchange wall and lower cone, and its inside is provided with refractory liner.
Aforesaid direct-combustion hot air cupola furnace, the size of wherein said charge door designs according to the air capacity that CO burning needs in the furnace gas replenish, and is generally the 1/3-1/5 of common cupola charging open area.
Aforesaid direct-combustion hot air cupola furnace, the wherein said useful height of a cupola are designed to the effective depth lower than domestic furnace cupola, and general effective depth is 3.5-5 with the ratio of burner hearth average diameter.
Aforesaid direct-combustion hot air cupola furnace, wherein said curve burner hearth is provided with many exhaust outlets.
Aforesaid direct-combustion hot air cupola furnace is provided with compensator piece in the wherein said hot air duct, and is unlikely by thermal stress damage to guarantee pipeline.
Aforesaid direct-combustion hot air cupola furnace, wherein said pre-warm-air pipe is provided with compensator piece in the road, to protect pre-warm-air pipe road unlikely by thermal stress damage.
The utility model compared with prior art has tangible advantage and good effect.By above technical scheme as can be known, the utility model direct-combustion hot air cupola furnace not only thermal efficiency height, metallurgical performance is good, and has simple in structurely, and system cost is low; Can be furnace charge with iron ore and steel and iron industry waste material, produce ironcasting economically.
Test furnace cupola according to structure of the present utility model and operation principle constitute has confirmed science of the present utility model and feasibility with the melting practice.
In sum, the utility model direct-combustion hot air cupola furnace, no matter it structurally or bigger improvement all arranged on the function, and have large improvement technically, and produced handy and practical effect, and have the effect of enhancement really, thus be suitable for practicality more, really be a new and innovative, progressive, practical utility model.
Concrete structure of the present utility model, principle provide in detail by following examples and accompanying drawing thereof.
Fig. 1 is the structural representation of a specific embodiment of the present utility model.
Fig. 2 is the generalized section of the charge door of above-mentioned specific embodiment of the present utility model with the lower part.
Fig. 3 is the combustion heat-exchange device of above-mentioned specific embodiment of the present utility model and the cut-away section schematic diagram of chimney heat exchange.
Fig. 4 is that A among Fig. 3 is to view.
Further specify structure of the present utility model and operation principle below in conjunction with accompanying drawing.
Relevant calculation by the char combustion theory can be known, utilizes the physics chemical heat hot and that carbon monoxide comprises in the furnace cupola furnace gas furnace cupola air blast can be heated to more than 450 ℃, makes furnace cupola obtain high-temperature hot-air.When comprising a large amount of carbon monoxide by charge door in the furnace cupola high-temperature furnace gas, mix with the air that replenishes from charge door, possessed good burning condition, carbon monoxide forms flame combustion above charge door.If CO burning and furnace gas heat-exchanger rig are set above charge door, just can simply effectively comprehensively reclaim the furnace cupola burner gas residual heat.
Operation principle of the present utility model is: owing to adopt less effective depth, still keep higher temperature during furnace gas effusion furnace charge, carbon monoxide in the furnace gas and charge door replenish after into the air of furnace gas mixes, still keep the temperature more than 600 ℃, be arranged in the combustion heat-exchange device of charge door top burning and emit heat, therefore be referred to as the direct combustion blast-heating cupola; Be the utility model in furnace cupola, except the burning of coke, have the burning of carbon monoxide in the furnace gas simultaneously.The heat energy that CO burning produces in the furnace gas feeds back to char combustion by the heating air blast, promotes char combustion.Mutually promoting of char combustion and furnace gas burning makes ignition temperature more and more higher, and Deoxidation Atmosphere in Furnace is more and more stronger, finally reaches the best operating point of furnace cupola.
See also shown in Figure 1, the utility model direct-combustion hot air cupola furnace, it is made up of institutes such as spark catcher 1, chimney heat exchanger 2, pre-warm-air pipe road 3, combustion heat-exchange device 4, hot air duct 5, furnace gas outlet 6, preheating section 7, bellows section 8, forehearth 9, charger 10, charge door 11, charging scffold 12, cooling blower 13, blowing line 14, compensator piece 15, curve burner hearth 16, many exhaust outlets 17, cold wind bellows 18, expansion appliance 19, pre-hot blast bellows 20, serpentine heat exchanger 24, preheating wind inlet 26, hot-blast outlets 27.
Chimney heat exchanger 2 is arranged on the top of combustion heat-exchange device 4, chimney heat exchanger 2, combustion heat-exchange device 4 all are arranged on the top of charge door 11, combustion heat-exchange device 4 is closely linked with charge door 11, the size of charge door 11 designs according to the air capacity that CO burning needs in the furnace gas replenish, the 1/3-1/5 that is about common cupola charging open area, through giving the furnace cupola air blast of chimney heat exchanger 2 preheatings, enter combustion heat-exchange device 4 by pre-warm-air pipe road 3.Through giving the furnace cupola air blast of combustion heat-exchange device 4 heating, enter bellows section 8 by hot air duct 5, use for the foundry coke burning.That the useful height of a cupola of present embodiment adopts is close with the industrially developed country furnace cupola, than the lower effective depth of domestic furnace cupola, general effective depth is 3.5-5 with the ratio of burner hearth average diameter.
See also shown in Figure 2; furnace gas outlet 6 is arranged on the opposite of charge door 11; the air outlet of cooling blower 13 is over against charge door 11; when the hot blast temperature of furnace cupola surpasses predetermined temperature; cooling blower 13 starts; high-temperature furnace gas is blown out by furnace gas outlet 6, and the combustion heat-exchange device 4 with protection charge door 11 tops prolongs its service life.Be provided with curve burner hearth 16 below charge door 11, curve burner hearth 16 is built by laying bricks or stones by the conventional oven lining material and is formed.Curve burner hearth 16 is provided with many exhaust outlets 17, and present embodiment is four exhaust outlets, facts have proved, when furnace cupola used furnace charge inferior, many exhaust outlets had melting effect preferably.Be provided with compensator piece 15 in the hot air duct 5, can effectively reduce the thermal stress in the hot air duct 5, guarantee that pipeline is unlikely by thermal stress damage.Cupola charging mouth size is offered by the air capacity that CO burning in the furnace gas need replenish, and common furnace cupola is generally offered charge door by charger appearance profile and movement locus, and the more common furnace cupola of charge door of the present utility model is little.
See also shown in Figure 3, chimney heat exchanger 2 is similar to common furnace cupola bladder structure, top is provided with cold wind bellows 18, expansion appliance 19, and the furnace cupola air blast of process preheating collects in the pre-hot blast bellows 20 of bottom, delivers in the combustion heat-exchange device 4 by pre-warm-air pipe road 3 and further heats.Be connected to compensator piece 15 in the pre-warm-air pipe road 3, to protect pre-warm-air pipe road 3 unlikely by thermal stress damage.Combustion heat-exchange device 4 is most important burner gas residual heat retracting devices, and the carbon monoxide in the furnace gas burns therein and emits heat, and serpentine heat exchanger 24 wherein can further be heated to very high-temperature with the furnace cupola air blast after the preheating.The shell of combustion heat-exchange device 4 is made up of upper cone 21, combustion heat-exchange wall 23 and lower cone 25, and its inside is provided with refractory liner 22.
See also shown in Figure 4, the as can be seen from the figure trend of hot blast in the serpentine heat exchanger 24, pre-hot blast enters serpentine heat exchanger 24 from preheating wind inlet 27, the serpentine heat exchanger 24 further hot blasts of heating joins by hot-blast outlet 27 and hot air duct 5.
More than be preferred embodiment of the present utility model, the utility model can also adopt other structure, only uses combustion heat-exchange device 4 also the furnace cupola air blast can be heated to very high-temperature as not adopting the 2 preheating furnace cupola air blast of chimney heat exchanger; Do not adopt curve burner hearth 16 and adopt simple straight line burner hearth; Do not adopt many exhaust outlets 17 and adopt single air outlet; Do not adopt the conventional oven lining material, and adopt water-cooled thin-lining or lining-less technology all can realize.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.
Claims (8)
1, a kind of direct-combustion hot air cupola furnace, it includes spark catcher (1), preheating section (7), bellows section (8), charge door (11), hot air duct, burner hearth, cooling blower (13), blowing line (14), forehearth (9), charger (10), charging scffold (12), it is characterized in that also comprising: chimney heat exchanger (2), combustion heat-exchange device (4), hot air duct (5), furnace gas outlet (6), wherein: this chimney heat exchanger (2), device for the preheating air blast, its bottom is connected the top of preheating air blast through the combustion heat-exchange device (4) that enters of pre-warm-air pipe road (3), and the top is connected in the bottom of spark catcher (1); This hot air duct (5), its upper end connects the bottom that is arranged on combustion heat-exchange device (4), and its lower end connects the top that is arranged on bellows section (8); This furnace gas outlet (6) connects the top that is arranged on preheating section (7); This bellows section (8) is the bellows section that combustion heat-exchange device (4) heating air blast enters through hot air duct (5), and its connection is arranged on the bottom of preheating section (7); Charge door (11), the top and the furnace gas outlet (6) that are arranged on preheating section 7 are the relative direction setting.
2, direct-combustion hot air cupola furnace according to claim 1 is characterized in that described combustion heat-exchange device (4) is arranged on the top of charge door (11), and combustion heat-exchange device (4) is closely linked with charge door (11).
3, direct-combustion hot air cupola furnace according to claim 1 is characterized in that the shell of described combustion heat-exchange device (4) is made up of upper cone (21), combustion heat-exchange wall (23) and lower cone (25), and its inside is provided with refractory liner (22).
4, direct-combustion hot air cupola furnace according to claim 1 is characterized in that the size of described charge door (11) designs according to the air capacity that CO burning needs in the furnace gas replenish, and is generally the 1/3-1/5 of common cupola charging open area.
5, direct-combustion hot air cupola furnace according to claim 1 is characterized in that the described useful height of a cupola is designed to the effective depth lower than domestic furnace cupola, and general effective depth is 3.5-5 with the ratio of burner hearth average diameter.
6, direct-combustion hot air cupola furnace according to claim 1 is characterized in that described curve burner hearth (16) is provided with many exhaust outlets (17).
7, direct-combustion hot air cupola furnace according to claim 1 is characterized in that being provided with in the described hot air duct (5) compensator piece (15).
8, direct-combustion hot air cupola furnace according to claim 1 is characterized in that being provided with in the described pre-warm-air pipe road (3) compensator piece (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00201203 CN2411454Y (en) | 2000-01-28 | 2000-01-28 | Direct-burning-type blast-heating cupola |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00201203 CN2411454Y (en) | 2000-01-28 | 2000-01-28 | Direct-burning-type blast-heating cupola |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2411454Y true CN2411454Y (en) | 2000-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00201203 Expired - Fee Related CN2411454Y (en) | 2000-01-28 | 2000-01-28 | Direct-burning-type blast-heating cupola |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2411454Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102047059A (en) * | 2008-05-30 | 2011-05-04 | 爱信高丘株式会社 | Gas cupola for melting metal |
| CN104034151A (en) * | 2013-03-05 | 2014-09-10 | 赵文鹤 | Cupola furnace with high thermal efficiency |
-
2000
- 2000-01-28 CN CN 00201203 patent/CN2411454Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102047059A (en) * | 2008-05-30 | 2011-05-04 | 爱信高丘株式会社 | Gas cupola for melting metal |
| US8420009B2 (en) | 2008-05-30 | 2013-04-16 | Aisin Takaoka Co., Ltd. | Gas cupola for melting metal |
| CN102047059B (en) * | 2008-05-30 | 2013-08-07 | 爱信高丘株式会社 | Gas cupola for melting metal |
| CN104034151A (en) * | 2013-03-05 | 2014-09-10 | 赵文鹤 | Cupola furnace with high thermal efficiency |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |