CN202329065U - Roasting vertical furnace - Google Patents
Roasting vertical furnace Download PDFInfo
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- CN202329065U CN202329065U CN2011204761499U CN201120476149U CN202329065U CN 202329065 U CN202329065 U CN 202329065U CN 2011204761499 U CN2011204761499 U CN 2011204761499U CN 201120476149 U CN201120476149 U CN 201120476149U CN 202329065 U CN202329065 U CN 202329065U
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- vertical baking
- baking furnace
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Abstract
The utility model discloses a roasting vertical furnace, which comprises a furnace body, more than two combustion chambers and a drying bed, wherein the drying bed is positioned on the top of the furnace body; the inner cavity of the furnace body is partitioned into a drying section, a roasting section, a soaking section and a cooling section from top to bottom in sequence; the combustion chambers are positioned at positions on the side face of the furnace body which correspond to the roasting section, and are communicated with the inner cavity of the furnace body; the furnace body is provided with a hot air return assembly; an air inlet end of the hot air return assembly is communicated with the inner cavity of the furnace body positioned at the bottoms of the combustion chambers; and an air outlet end of the hot air return assembly is communicated with the inner cavity of the furnace body which is positioned between the tops of the combustion chambers and the drying bed. The roasting vertical furnace has the advantages of simple and compact structure, low cost, long service life, stable and reliable work, higher operation adjustability, capability of optimizing atmosphere in the furnace, reduction in energy consumption of material roasting, more uniform heating, and the like.
Description
Technical field
The utility model is mainly concerned with mineral roasting apparatus field, refers in particular to a kind of roasting and uses shaft furnace.
Background technology
Shaft furnace is widely used in the oxidizing roasting or the DRI field of iron ore pellets, and be used for the oxidizing roasting of iron ore pellets in the iron and steel metallurgical industry or directly pelletizing be reduced to iron, be indispensable process equipment in the Ferrous Metallurgy; Simultaneously, the roasting that it also can be used for lump materials such as lime stone dolomite is used for producing lime, is very general a kind of roasting apparatus.Shaft furnace is as a kind of roasting apparatus, compares with rotary kiln to have little, the advantages such as flow process is few, whole reduced investment of occupation of land, has very high promotional value for mini-medium mill.
Common shaft furnace structure is as shown in Figure 1: material, moves downwards through drying bed 1 drying that is positioned at the top from body of heater 7 top clothes; The required heat of roasting is mainly supplied with by the combustion chamber 4 of body of heater 7 both sides.Material is from top to bottom successively through zones such as dryer section 701, furnace zone 702, soaking zone 703, cooling sections 704, and the cooling air that the air blast 5 that after material arrives cooling section 704, is cooled blasts cools off, and pelletizing is cooled to discharged by discharge machine 6 behind the lower temperature.Most of cooling air is through behind the cooling section 704, absorbed pelletizing heat after temperature raise, and from middle part air-guiding wall 2, flow into drying bed 1 time.
Wherein, middle part air-guiding wall 2 is very important parts in the shaft furnace structure, and its effect is the cold wind that shunting comes up from cooling section 704 drums, and among the figure shown in the arrow promptly is the distinguished and admirable trend of shaft furnace.For the high temperature pellet of not allowing furnace zone 702 receives the cold wind influence that cooling section 704 drums come up from the bottom; Be provided with middle part air-guiding wall 2 in furnace zone 702 and dryer section 701, air-guiding wall 2 intermediate distributaries to furnace roof sheds from the middle part so just can to let a part of cold wind.Below middle part air-guiding wall 2, be provided with water beams 3, its effect is the gravitational load of bearing middle part air-guiding wall 2, in water beams 3, must feed recirculated cooling water and not receive temperatures involved with the load bearing stength that guarantees beam.
Though the shaft furnace type of furnace of said structure is simple, has many disadvantages:
1) life-span of middle part air-guiding wall 2 is extremely short: middle part air-guiding wall 2 is owing to receive water beams 3 and the restriction of body of wall, and the life-span is extremely short, grows more than a year most; The shortest tens days; And maintenance changes very trouble, in case middle part air-guiding wall 2 collapses, needs the long time to repair; Have a strong impact on production, workman's maintenance intensity and environment facies are when abominable simultaneously.
2) middle part air-guiding wall 2 has been arranged, shaft furnace need be provided with the large-scale cooling device that adapts to it, brings a series of problems such as equipment maintenance cost is high, the time between overhauls(TBO) is short, the stove operating rate is low, body of heater investment cost height thereupon.
3) length of water beams 3 is unsuitable long, thereby longly then can cause the too high effect that loses cooling Liang Bi of water temperature inside.And caused the Classical Shaft Furnace size to maximize indirectly to the restriction of water beams 3 length, brought loss to iron and steel enterprise.
4) because shaft furnace only leans on 4 heat supplies of two side combusion chambers; Can't temperature be regulated evenly by four sections and distribute; Be prone to cause pellet dross in descending process like this; Often needing to cause the clear kiln of blowing out, the human and material resources of steel plant have all been caused great burden, also had a strong impact on year operating rate and annual production simultaneously.
The utility model content
The technical problem that the utility model will solve just is: the energy consumption, order heating that to the technical problem that prior art exists, the utility model provides a kind of simple and compact for structure, with low cost, long service life, working stability is reliable, adjusted property is stronger, can optimize furnace atmosphere, reduce the roasting material be vertical baking furnace more uniformly.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of vertical baking furnace; Comprise body of heater, plural combustion chamber and the drying bed that is positioned at the body of heater top; Be divided into dryer section, furnace zone, soaking zone and cooling section in the inner chamber of said body of heater from top to bottom successively; Said combustion chamber is positioned at the position corresponding with furnace zone, body of heater side and is communicated with the body of heater inner chamber; Said body of heater is provided with backheat wind assembly, and the air intake of said backheat wind assembly is communicated with the body of heater inner chamber that is positioned at combustion chamber bottom, the outlet air end of said backheat wind assembly be communicated with body of heater inner chamber between the drying bed at top of combustion chamber.
Further improvement as the utility model:
Said backheat wind assembly comprises one group of above blower fan and hot air duct.
Said hot air duct is provided with the high temperature control valve.
The opening at said hot air duct outlet air end place is obliquely to be arranged.
That said furnace zone, soaking zone and cooling section place are equipped with is parallel with the combustion chamber placement direction, laterally be arranged in the burning beam in the body of heater inner chamber.
Said burning beam comprises cavity and is installed in the more than one middle part burner assembly in the cavity, and the bottom of said cavity offers the flame ejiction opening, and said cavity is enclosed by many water-cooled beams overlap joints and forms.
Be enclosed with refractory masses on the outer surface of said water-cooled beam.
The many water-cooled beams at place, said cavity top from top to bottom overlap successively and form two-layer above clad structure.
Said refractory masses is circular-arc being positioned at chamber outer surface top place, perhaps said refractory masses in the bottom that is positioned at cavity, place, flame ejiction opening both sides is circular-arc.
Middle part in the said cavity is provided with horizontal partition panel, being supported at both ends on the water-cooled beam of said horizontal partition panel, and said middle part burner assembly is installed on the horizontal partition panel.
Compared with prior art, the advantage of the utility model is:
1, the vertical baking furnace of the utility model through backheat wind assembly is set, has become the both sides wind-guiding by the middle part wind-guiding, has fully phased out traditional air-guiding wall and water beams structure; And replaced by backheat wind assembly just because of air-guiding wall, the problem that in the past receives the water beam length to limit the body of heater that can't maximize also is readily solved.Not only overcome the problem that traditional air-guiding wall life-span is short, maintenance cost is high and air quantity can't be regulated,
2, in the vertical baking furnace of the utility model; Many middle part burning beams are set,, can effectively temperature in the stove be evenly distributed for four sections by drying, roasting, soaking, cooling through regulating the combustion intensity of burning beam; Thereby reduce pellet dross phenomenon, increase shaft furnace operating rate and output.
3, the middle part burning beam is arranged at the middle part of whole burning beam with the middle part burner assembly, under the protection of water-cooled beam action and refractory masses, makes its operate as normal at a relative low temperature and in the environment of safety all the time, has prolonged its service life.Simultaneously, also further it is wrapped up, reduce the cooling chamber method of temperature, make existing oil cooling structure into water-cooling structure, reduced investment and maintenance cost, and further reduced the consumption of oily resource, practiced thrift cost through increasing refractory masses.
Description of drawings
Fig. 1 is the structural representation of shaft furnace in the prior art;
Fig. 2 is the structural representation of vertical baking furnace in the utility model;
Fig. 3 is the structural representation of burning beam in the utility model;
Fig. 4 is that B among Fig. 3 is to structural representation;
Fig. 5 is the sectional structure sketch map at A-A place among Fig. 3;
Fig. 6 is the structural representation of first kind of cavity profile of burning beam in the specific embodiment;
Fig. 7 is the structural representation of second kind of cavity profile of burning beam in the specific embodiment;
Fig. 8 is the structural representation of the third cavity profile of burning beam in the specific embodiment;
Fig. 9 is the structural representation of the 4th kind of cavity profile of burning beam in the specific embodiment.
Marginal data:
1, drying bed; 2, middle part air-guiding wall; 3, water beams; 4, combustion chamber; 5, cooling air blower; 6, backheat wind assembly; 61, hot air duct; 63, high temperature control valve; 7, body of heater; 701, dryer section; 702, furnace zone; 703, soaking zone; 704, cooling section; 8, burning beam; 801, cavity; 802, middle part burner assembly; 803, flame ejiction opening; 804, water-cooled beam; 805, refractory masses; 806, horizontal partition panel; 807, anchor studs; 808, gas pipe; 809, burner spout.
The specific embodiment
Below will combine Figure of description and specific embodiment that the utility model is explained further details.
As shown in Figure 2; The vertical baking furnace of the utility model; Comprise body of heater 7, plural combustion chamber 4 and the drying bed 1 that is positioned at body of heater 7 tops; Be divided into dryer section 701, furnace zone 702, soaking zone 703 and cooling section 704 (various air-flows are like diagram direction of arrow operation in the stove) in the inner chamber of body of heater 7 from top to bottom successively, combustion chamber 4 is positioned at the corresponding position of body of heater 7 sides and furnace zone 702 and is communicated with the body of heater inner chamber.Body of heater 7 is provided with backheat wind assembly 6, and the air intake of backheat wind assembly 6 is communicated with the body of heater inner chamber that is positioned at 4 bottoms, combustion chamber, the outlet air end of backheat wind assembly 6 be communicated with body of heater inner chamber between the drying bed 1 at 4 tops, combustion chamber.In the present embodiment, backheat wind assembly 6 is communicated with the body of heater inner chamber at soaking zone 703 places.Can extract low temperature wind from body of heater 7 soaking zones 703 both sides out through backheat wind assembly 6, the top, drying bed that upwards import combustion chamber 4 after concentrated are used for dried material below 1; So just become the both sides wind-guiding by the middle part wind-guiding, fully phased out traditional air-guiding wall and water beams structure, and replaced by backheat wind assembly 6 just because of air-guiding wall, the problem that in the past receives the water beam length to limit the body of heater that can't maximize also is readily solved.
In the present embodiment, backheat wind assembly 6 comprises one group of above blower fan and hot air duct 61.On hot air duct 61, be provided with high temperature control valve 63, every hot air duct 61 all can be regulated air quantity arbitrarily through high temperature control valve 63 like this, control dry gas stream and adjusting furnace atmosphere.
In the present embodiment, the opening at hot air duct 61 outlet air end places is obliquely to be arranged, can effectively prevent to manage interior dust stratification.
In the present embodiment, be equipped with at furnace zone 702, soaking zone 703 and cooling section 704 places parallel with combustion chamber 4 arranged direction, laterally be arranged in burning beam 8 in the body of heater inner chamber.In process of production,, can effectively regulate and control the Temperature Distribution of three sections of roasting, soaking and coolings, help temperature in the stove is evenly distributed by section, thereby reduce pellet dross phenomenon, increase shaft furnace operating rate and output through regulating the combustion intensity of three burning beams 8.
Like Fig. 3, Fig. 4 and shown in Figure 5; Burning beam 8 in the utility model comprises cavity 801 and is installed in the more than one middle part burner assembly 802 in the cavity 801 that the bottom of cavity 801 offers flame ejiction opening 803; Cavity 801 is enclosed by many water-cooled beams 804 overlap joints and forms; Water-cooled beam 804 feeds recirculated water when work, the temperature when working to reduce middle part burner assembly 802, thereby protection middle part burner assembly 802.Water-cooled beam 804 can adopt seamless steel pipe, and it is firm in structure, and weight capacity is strong, and is not easily broken, and the phenomenon of seepage can not occur.Through making existing oil cooling structure into water-cooling structure, reduced investment and maintenance cost, also further reduced the consumption of oily resource, practice thrift cost.
In the present embodiment; On the outer surface of several water-cooled beam 804 cavitys that form 801, be enclosed with refractory masses 805; This refractory masses 805 is used for water-cooled beam 804 and middle part burner assembly 802 are kept apart from bad working environment, to prolong their life-span.Referring to Fig. 3, Fig. 4, Fig. 5 and Fig. 6, be connected through anchor studs 807 between water-cooled beam 804 and the refractory masses 805, fixing between anchor studs 807 and the water-cooled beam 804 through welding.Like this, 802 middle parts that are positioned at whole burning beam of middle part burner assembly, under the protection of the effect of water-cooled beam 804 and refractory masses 805, be able at a relative low temperature and in the environment of safety operate as normal go down.
Rise because the High Temperature Gas in the cavity 801 is known from experience up, therefore can form a high-temperature area, make under its hot soak condition at the top of cavity 801.In the present embodiment, many water-cooled beams 804 that further make cavity 801 tops places from top to bottom successively overlap joint form two-layer above clad structure, be used for strengthening the cooling effect at this place, also can be in order to heat insulation, load-bearing and the impact resistance that strengthens whole burning beam.Above-mentioned by the many water-cooled beams 804 two-layer above clad structure that forms of overlap joint successively from top to bottom, the shape in its cross section can be triangle, trapezoidal or the like.
In the present embodiment, refractory masses 805 is circular-arc being positioned at cavity 801 outer surface tops and at.It is in order to make material be difficult for piling up at the cavity top, can to play protection burning beam action that the place, top of cavity 801 outer surfaces is circular-arc.And to be circular-arc be in order to make the sectorial area that jets out flames wider, can to play certain water conservancy diversion and revise the shape effect flame at cavity 801 bottoms, flame ejiction opening 803 both sides place, thereby evenly roasting material, overheavy firing effect are treated in heating.
In other embodiments, as shown in Figure 6, refractory masses 805 also can be the right-angle side form in the at of cavity 801; Or as shown in Figure 7, refractory masses 805 also can be that step-like, topmost is a flat face for the right-angle side form and at the top of cavity 801 in the at of cavity 801; Or as shown in Figure 8, refractory masses 805 is step-like at the top of cavity 801 only, topmost is a flat face; Or as shown in Figure 9, refractory masses 805 is a tip-angled shape at the top of cavity 801 only.
In the present embodiment, middle part burner assembly 802 comprises gas pipe 808 and is connected in the more than one burner spout 809 on the gas pipe 808.Referring to Fig. 3, the middle part in cavity 801 is provided with horizontal partition panel 806, and laterally Weld-supporting is passed through on water-cooled beam 804 in the two ends of partition panel 806, and gas pipe 808 just is erected on the horizontal partition panel 806, can directly extract and insert during replacing, and is very convenient.
In the production process; On the gas pipe 808 of middle part burner assembly 802 a flame ejiction opening 803 is just arranged at a certain distance; Air mixed combustion with in the cavity 801 jets out flames equably and is fan-shaped along arc refractory masses 805 and disperses out, and material is evenly added thermal bake-out.Simultaneously, do not stop to have water circulation water-cooled beam 804 wherein constantly to carry out heat exchange, the operating temperature of burner assembly 802 in the middle part of reducing with middle part burner assembly 802 ambient airs.Outside refractory masses 805 tightly wraps up above-mentioned all devices, in the protection interior arrangement, has also played water conservancy diversion and the effect of revising flame profile, makes igniting effect ideal more, and product quality is better.
Below only be the preferred implementation of the utility model, the protection domain of the utility model also not only is confined to the foregoing description, and all technical schemes that belongs under the utility model thinking all belong to the protection domain of the utility model.Should be pointed out that for those skilled in the art,, should be regarded as the protection domain of the utility model in the some improvement and the retouching that do not break away under the utility model principle prerequisite.
Claims (10)
1. vertical baking furnace; Comprise body of heater (7), plural combustion chamber (4) and the drying bed (1) that is positioned at body of heater (7) top; Be divided into dryer section (701), furnace zone (702), soaking zone (703) and cooling section (704) in the inner chamber of said body of heater (7) from top to bottom successively; Said combustion chamber (4) is positioned at the position corresponding with furnace zone (702), body of heater (7) side and is communicated with the body of heater inner chamber; It is characterized in that: said body of heater (7) is provided with backheat wind assembly (6); The air intake of said backheat wind assembly (6) is communicated with the body of heater inner chamber that is positioned at combustion chamber (4) bottom, the outlet air end of said backheat wind assembly (6) be positioned at top, combustion chamber (4) and be communicated with body of heater inner chamber between the drying bed (1).
2. vertical baking furnace according to claim 1 is characterized in that: said backheat wind assembly (6) comprises one group of above blower fan and hot air duct (61).
3. vertical baking furnace according to claim 2 is characterized in that: said hot air duct (61) is provided with high temperature control valve (63).
4. vertical baking furnace according to claim 2 is characterized in that: the opening at said hot air duct (61) outlet air end place is obliquely to be arranged.
5. according to claim 1 or 2 or 3 or 4 described vertical baking furnaces, it is characterized in that: said furnace zone (702), soaking zone (703) and cooling section (704) locate to be equipped with parallel with combustion chamber (4) arranged direction, laterally be arranged in burning beam (8) in the body of heater inner chamber.
6. vertical baking furnace according to claim 5; It is characterized in that: said burning beam (8) comprises cavity (801) and is installed in the more than one middle part burner assembly (802) in the cavity (801); The bottom of said cavity (801) offers flame ejiction opening (803), and said cavity (801) is enclosed by many water-cooled beams (804) overlap joint and forms.
7. vertical baking furnace according to claim 6 is characterized in that: be enclosed with refractory masses (805) on the outer surface of said water-cooled beam (804).
8. vertical baking furnace according to claim 6 is characterized in that: the many water-cooled beams (804) at place, said cavity (801) top from top to bottom overlap successively and form two-layer above clad structure.
9. vertical baking furnace according to claim 6; It is characterized in that: said refractory masses (805) is circular-arc being positioned at cavity (801) outer surface top place, perhaps said refractory masses (805) in the bottom that is positioned at cavity (801), place, flame ejiction opening (803) both sides is circular-arc.
10. vertical baking furnace according to claim 6; It is characterized in that: the middle part in the said cavity (801) is provided with horizontal partition panel (806); Being supported at both ends on the water-cooled beam (804) of said horizontal partition panel (806), said middle part burner assembly (802) is installed on the horizontal partition panel (806).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204761499U CN202329065U (en) | 2011-11-25 | 2011-11-25 | Roasting vertical furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204761499U CN202329065U (en) | 2011-11-25 | 2011-11-25 | Roasting vertical furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202329065U true CN202329065U (en) | 2012-07-11 |
Family
ID=46441046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204761499U Withdrawn - After Issue CN202329065U (en) | 2011-11-25 | 2011-11-25 | Roasting vertical furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202329065U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134304A (en) * | 2011-11-25 | 2013-06-05 | 中冶长天国际工程有限责任公司 | Roasting shaft furnace |
| CN111707698A (en) * | 2020-07-16 | 2020-09-25 | 西安交通大学 | Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode |
-
2011
- 2011-11-25 CN CN2011204761499U patent/CN202329065U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134304A (en) * | 2011-11-25 | 2013-06-05 | 中冶长天国际工程有限责任公司 | Roasting shaft furnace |
| CN103134304B (en) * | 2011-11-25 | 2015-08-19 | 中冶长天国际工程有限责任公司 | A kind of vertical baking furnace |
| CN111707698A (en) * | 2020-07-16 | 2020-09-25 | 西安交通大学 | Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20150819 |
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| RGAV | Abandon patent right to avoid regrant |