CN101666541B - Double-medium hot-blast furnace - Google Patents
Double-medium hot-blast furnace Download PDFInfo
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- CN101666541B CN101666541B CN2009100184983A CN200910018498A CN101666541B CN 101666541 B CN101666541 B CN 101666541B CN 2009100184983 A CN2009100184983 A CN 2009100184983A CN 200910018498 A CN200910018498 A CN 200910018498A CN 101666541 B CN101666541 B CN 101666541B
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Abstract
The invention discloses a double-medium hot-blast furnace which is provided with a liquid medium circulating heat transfer device. The liquid medium circulating heat transfer device comprises a heated passage, a heat exchanger and a circulating pump which are mutually communicated, wherein the heat exchanger is arranged in the air supply passage; the heated passage comprises a base sandwich passage arranged on the wall of a base of the furnace body; the heated passage also comprises a combustion chamber sandwich passage arranged on the wall of the combustion chamber; and a furnace grate comprises hollow pipes and forms one part of the heated passage. The invention can heat air by high-temperature smoke or a liquid medium, thereby improving thermal efficiency, effectively reducing the temperature of a furnace opening and the furnace grate, preventing the phenomenon of overburning and prolonging the service life of the double-medium hot-blast furnace.
Description
Technical field
The present invention relates to a kind of hot-blast stove.
Background technology
The operation principle of hot-blast stove is, the heat that utilizes fuel (for example coal) burning back to produce forms hot blast after Cryogenic air is heated into high temperature air, outwards transmits through piping.
Chinese invention patent CN201203263Y discloses a kind of calandria hot-blast stove of the applicant; It comprises burner hearth; The inner space of said burner hearth is divided into combustion chamber and the heating clamber that is interconnected, and in the heating clamber of said burner hearth, is provided with many heat exchanger tubes, and the heating clamber of said burner hearth is provided with outlet flue; Around the outside furnace shell of said burner hearth, said burner hearth forms the hot-air channel that is communicated with said heat exchanger tube with cavity between the furnace shell.Said outlet flue place is provided with smoke suction machine, and the setting of smoke suction machine can make whole burner hearth form a kind of negative pressure that can control; Improved combustion position; Improved the utilization rate of coal, improved flue dust simultaneously and stopped up the problem of flue, and avoided the defective that pressure combustion brought; What feasible burning became can control, and has realized the automation control of whole hot-blast stove working condition.In order to increase heat exchange area, improve the thermal efficiency of hot-blast stove, a plurality of partition walls are set in heating clamber, form the exhaust gases passes of bending.
Through above-mentioned improvement, the thermal efficiency of hot-blast stove is greatly improved, and effectively reduces user's use cost.But the coal-fired heat that in the combustion chamber, burns and produced, still some is lost to the external world through base of furnace body, fire door and furnace shell etc. on the one hand, is not used; On the other hand, exist burn-off phenomenon around fire bars and the fire door, influenced the service life of hot-blast stove.
Summary of the invention
Technical problem to be solved by this invention is: a kind of double-medium hot-blast furnace is provided, with the thermal efficiency that improves hot-blast stove, the service life that prolongs hot-blast stove.
For solving the problems of the technologies described above, technical scheme of the present invention is: double-medium hot-blast furnace comprises: base of furnace body; Burner hearth, said burner hearth are installed on the said base of furnace body, and the inner space of said burner hearth is divided into combustion chamber and the heating clamber that is interconnected, and the below of said combustion chamber is equipped with fire grate; Be provided with many heat exchanger tubes in the said heating clamber; Around the outside furnace shell of said burner hearth, the hot-air channel that said burner hearth and cavity formation between the said furnace shell are communicated with said heat exchanger tube; Be connected in the air outlet of blower fan and the air-supply passage between the said furnace shell, said air-supply passage is communicated with said hot-air channel; Said double-medium hot-blast furnace also comprises a liquid medium cycle heat exchange device, and said liquid medium cycle heat exchange device comprises heated passage, heat exchanger and the circulating pump that is interconnected.
As a kind of improvement, said heat exchanger is arranged in the said air-supply passage, and said heated passage comprises the base sandwich passage on the wall that is arranged at said base of furnace body.Said heated passage also comprises the combustion chamber sandwich passage on the wall that is arranged at said combustion chamber.Said fire grate is made up of hollow pipe, and said fire grate constitutes the part of said heated passage.
As further improvement, said liquid medium cycle heat exchange device is water cycle heat exchange device or conduction oil cycle heat exchange device.
After having adopted technique scheme; The invention has the beneficial effects as follows: because double-medium hot-blast furnace of the present invention; Cavity between its burner hearth and the furnace shell forms the hot-air channel that is communicated with heat exchanger tube, and is connected in the air outlet of blower fan and is connected with hot-air channel with air-supply passage between the furnace shell.Double-medium hot-blast furnace of the present invention also comprises a liquid medium cycle heat exchange device, and liquid medium cycle heat exchange device comprises heated passage, heat exchanger and the circulating pump that is interconnected again, and wherein, heat exchanger is arranged in the air-supply passage.Heated passage comprises base sandwich passage on the wall that is arranged at base of furnace body, be arranged at combustion chamber sandwich passage on the wall of combustion chamber and the fire grate that is made by hollow pipe.Collect radiation and be transmitted on the wall of base of furnace body, combustion chamber or the heat on the fire grate through heated passage; Be delivered to heat exchanger through liquid medium; To carry out preheating by the Cryogenic air that air-supply passage gets into through heat exchanger, and then air further added the thermosetting hot blast through the heat exchanger tube that is arranged in the heating clamber.Therefore, use double-medium hot-blast furnace provided by the invention both can pass through high-temperature flue gas, can also heat air through liquid medium, thereby reduce thermal losses, improved the thermal efficiency, and then reduced operating cost.
Because heated passage comprises combustion chamber sandwich passage and fire grate on the wall that is arranged at the combustion chamber; Therefore; Liquid medium can fully absorb heat and the heat on the fire grate on the wall of combustion chamber, thereby reduces the temperature of fire door and fire grate effectively, avoids burn-off phenomenon; Prolong the service life of double-medium hot-blast furnace, reduce maintenance cost.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the vertical structure cutaway view of the embodiment of the invention;
Fig. 2 is the cutaway view at D-D place among Fig. 1;
Among the figure: 1. base of furnace body; 11. base sandwich passage; 2. furnace shell; 21. air outlet; 3. heat exchanger tube; 4. blower fan; 5. fire grate; 6. heat exchanger; 7. smoke suction machine; 8. chimney; 9. circulating pump; A. combustion chamber; B. heating clamber; C. hot-air channel; D. air-supply passage; A1. combustion chamber sandwich passage.
The specific embodiment
As shown in Figure 1, a kind of double-medium hot-blast furnace, it comprises base of furnace body 1; Burner hearth is installed on the base of furnace body 1, and the inner space of burner hearth is divided into combustion chamber A and the heating clamber B that is interconnected, wherein; Fire grate 5 is installed below the A of combustion chamber, in heating clamber B, is provided with many heat exchanger tubes 3.Smoke suction machine 7 is communicated with heating clamber B, and flue gas is discharged through chimney 8, also can the horizontal flue that the outlet flue place plugs into be inserted in the livestock and poultry house, as warming installation, has not only avoided the contained heat waste of flue gas to fall, and has also alleviated the pollution to environment.The furnace shell 2 that is provided with insulation material is outside around burner hearth, on furnace shell 2, is provided with air outlet 21, and burner hearth is divided into the hot-air channel C that is connected with heat exchanger tube 3 with cavity between the furnace shell 2.
On the body of heater of hot-blast stove, be provided with blower fan 4, air-supply passage D is connected between blower fan 4 and the furnace shell 2.Blower fan 4 sucks air from air inlet, through air-supply passage D, hot-air channel C, and then send into heat exchanger tube 3 and add the thermosetting hot blast.The coal-fired high-temperature flue gas that produces in combustion chamber A internal combustion is first kind of medium that the hot blast in the exchange heat pipe 3 heats.
Double-medium hot-blast furnace also comprises a liquid medium cycle heat exchange device, and liquid medium cycle heat exchange device comprises heated passage, heat exchanger 6 and the circulating pump 9 that is interconnected.Wherein, heat exchanger 6 is arranged in the air-supply passage D, and heated passage comprises the base sandwich passage 11 on the wall that is arranged at said base of furnace body 1 and is arranged at the combustion chamber sandwich passage a1 on the wall of said combustion chamber A.In order farthest to absorb heat, base sandwich passage 11 and combustion chamber sandwich passage a1 will increase its heating surface area as much as possible.Fire grate 5 is made up of hollow pipe, and these fire grates 5 have also constituted the part of heated passage.Collect radiation and be transmitted on the wall of base of furnace body 1, combustion chamber A and the heat on the fire grate 5 through heated passage; Through liquid medium heat is delivered to heat exchanger 6; To carry out preheating by the Cryogenic air that blower fan 4 is blown into air-supply passage D through heat exchanger 6, and then further add the thermosetting hot blast through the 3 pairs of air of heat exchanger tube that are arranged in the heating clamber B.As another kind of selection scheme; Heat exchanger 6 is installed in the low-temperature region of hot-air channel C; The Cryogenic air of being sent into by blower fan 4 is through the low-temperature region of hot-air channel C the time, and liquid medium in the heat exchanger 6 and Cryogenic air are carried out heat exchange, and Cryogenic air is carried out preheating.It also can be the heat conduction wet goods that medium in the liquid medium cycle heat exchange device is preferably water, and this liquid medium just becomes second kind of medium that the hot blast in the exchange heat pipe 3 heats.
The air inlet of blower fan 4 can be provided with two, and an air inlet of blower fan 4 communicates with outside air, directly with extraneous Cryogenic air heating, forms outer circulation; Another air inlet of blower fan 4 can need the place of hot blast heating to be communicated with greenhouse vegetable booth, livestock and poultry cultivation house etc.; Circulation in forming, after the hot blast of hot-blast stove heating fed these place that need heat heat radiations, hot blast temperature reduced; And then in hot-blast stove, heat once more through the air inlet circulating reflux of blower fan 4; The heat that fired coal combustion produces is fully used, and has reduced thermal losses, has improved the thermal efficiency.
As those of ordinary skill in the art, in order to reduce the loss of heat, improve the thermal efficiency, common way is to increase the insulation measure, and heat-insulation layer for example is set on furnace shell.In order to reduce the burning problem of fire door and fire grate, common way is the material that fire door and fire grate is changed into more anti-burning.Seeming the problem of not theing least concerned as the present inventor with these two connects; Not only reduced the temperature of fire door and fire grate through liquid medium cycle heat exchange device; Avoided the burning problem, prolonged the service life of double-medium hot-blast furnace, also with the heat collection that originally wastes; Be used for preheating, reached the effect that improves the thermal efficiency hot blast.
Claims (5)
1. double-medium hot-blast furnace comprises:
Base of furnace body;
Burner hearth, said burner hearth are installed on the said base of furnace body, and the inner space of said burner hearth is divided into combustion chamber and the heating clamber that is interconnected, and the below of said combustion chamber is equipped with fire grate; Be provided with many heat exchanger tubes in the said heating clamber, the coal-fired high-temperature flue gas that internal combustion produces in said combustion chamber is first kind of medium that the hot blast in the said heat exchanger tube is heated;
Around the outside furnace shell of said burner hearth, the hot-air channel that said burner hearth and cavity formation between the said furnace shell are communicated with said heat exchanger tube;
Be connected in the air outlet of blower fan and the air-supply passage between the said furnace shell, said air-supply passage is communicated with said hot-air channel;
It is characterized in that: said double-medium hot-blast furnace also comprises a liquid medium cycle heat exchange device; Said liquid medium cycle heat exchange device comprises heated passage, heat exchanger and the circulating pump that is interconnected, and said heated passage comprises the base sandwich passage on the wall that is arranged at said base of furnace body.
2. double-medium hot-blast furnace as claimed in claim 1 is characterized in that: said heat exchanger is arranged in the said air-supply passage.
3. double-medium hot-blast furnace as claimed in claim 1 is characterized in that: said heated passage also comprises the combustion chamber sandwich passage on the wall that is arranged at said combustion chamber.
4. double-medium hot-blast furnace as claimed in claim 1 is characterized in that: said fire grate is made up of hollow pipe, and said fire grate constitutes the part of said heated passage.
5. like the described double-medium hot-blast furnace of the arbitrary claim of claim 1 to 4, it is characterized in that: said liquid medium cycle heat exchange device is water cycle heat exchange device or conduction oil cycle heat exchange device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100184983A CN101666541B (en) | 2009-09-30 | 2009-09-30 | Double-medium hot-blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100184983A CN101666541B (en) | 2009-09-30 | 2009-09-30 | Double-medium hot-blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666541A CN101666541A (en) | 2010-03-10 |
| CN101666541B true CN101666541B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100184983A Expired - Fee Related CN101666541B (en) | 2009-09-30 | 2009-09-30 | Double-medium hot-blast furnace |
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| CN (1) | CN101666541B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061678B (en) * | 2014-07-20 | 2016-08-24 | 泉州恒灼热力机械科技有限公司 | Heart-shaped heat exchanger tube multitube high temperature hot-blast furnace |
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2009
- 2009-09-30 CN CN2009100184983A patent/CN101666541B/en not_active Expired - Fee Related
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| CN101666541A (en) | 2010-03-10 |
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Granted publication date: 20120530 Termination date: 20170930 |
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