CN2258585Y - Double-layer iron chimney capable of utilizing waste heat - Google Patents
Double-layer iron chimney capable of utilizing waste heat Download PDFInfo
- Publication number
- CN2258585Y CN2258585Y CN 95238214 CN95238214U CN2258585Y CN 2258585 Y CN2258585 Y CN 2258585Y CN 95238214 CN95238214 CN 95238214 CN 95238214 U CN95238214 U CN 95238214U CN 2258585 Y CN2258585 Y CN 2258585Y
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- CN
- China
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- chimney
- air
- iron
- temperature
- preheating tube
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a double-layer iron chimney composed of an inner chimney (5), a spiral downward heat exchange fin (4) welded on the outer wall surface of the inner chimney (5), and an outer preheating cylinder (6). The air outlet of the outer preheating cylinder (6) is connected with a high-temperature blower (9) through an iron pipe (11) which is provided with a cold air pipe (7) with an adjustable valve, and the cold air pipe is used for controlling the temperature of preheating air. The residual heat of the high temperature fume produced by a flame reverberatory furnace is used to preheat room temperature air entering a furnace chamber by the utility model, and the aims of waste heat utilization and power consumption and pollution reduction are realized.
Description
The utility model relates to the iron chimney of a kind of flame reverberatory furnace.
At present, general middle-size and small-size fuel oil, combustion gas, coal-fired flame reverberatory furnace all adopt air blast to blast the method for the fuel mix of air at room temperature and atomizer, air nozzle, coal powder injection mouth, air at room temperature and fuel are sprayed into the burner hearth burning, by the flame reflection heat is passed to by molten metal, made the METAL HEATING PROCESS fusing; High-temperature flue gas enters atmosphere by flue collector, chimney.Because a large amount of air at room temperature enters burner hearth, air itself is heated and has absorbed a large amount of heat energy, thereby has increased unit of fuel consumption; This flame reverberatory furnace thermal efficiency is generally 25～30%, high-temperature flue gas is taken away heat loss and is accounted for about 50%, a large amount of high-temperature flue gas (about 700 ℃) by chimney to airborne release, a large amount of losses of the energy had both been caused, ambient air temperature is artificially risen, serious environment pollution is harmful to human health and is unfavorable for crop growth.
The purpose of this utility model is exactly the recovery of air intake mode, high-temperature flue gas waste heat at above-mentioned flame reverberatory furnace and utilization and designed the double-deck iron chimney of a kind of UTILIZATION OF VESIDUAL HEAT IN.
For achieving the above object, the utility model is a double-decker, comprises the internal layer that discharges high-temperature flue gas and the skin of preheating chamber warm air.Internal layer comprises rainhat, iron inner chimney and flue, and skin comprises rainhat, inner chimney outside wall surface, be welded on heat exchanging fin under the inner chimney outside wall surface screw, install and be positioned at the iron outer preheating tube of inner chimney periphery with the inner chimney coaxial line.
The setting of heat exchanging fin is in order to increase heat exchange area, and in order to improve the air at room temperature pre-heat effect, the heat exchanging fin screw is following to be arranged, and helical angle is 30～45 degree.
Helical layer is mobile outside for the ease of preheated air, and outer preheating tube internal diameter is 1.5～2.5 times of inner chimney external diameter; In order to prevent that high-temperature flue gas from entering outer preheating tube, outer preheating tube (air inlet) suitable for reading is lower than 2～3 meters of inner chimneys (exhaust outlet) suitable for reading; The outside wall surface of outer preheating tube is covered with certain thickness heat-insulation layer in case preheated air outwards dispels the heat by barrel; Outside preheating tube lower end overhead certain altitude (determining) by the air blast height locate to be provided with air outlet, air outlet links to each other with the air inlet of high temperature blower by the iron pipe that lays heat-insulation layer, also be connected with the iron pipe that lays heat-insulation layer between high temperature blower air outlet and the nozzle, realize that preheated air replaces air at room temperature to enter burner hearth.
In order to guarantee that preheated air temperature is no more than the temperature upper limit that high temperature blower allows use, outside connecting, be provided with the cool air hose of a band control valve on the iron pipe of preheating tube air outlet and high temperature blower air inlet, control into air at room temperature amount by regulating control valve, wind-warm syndrome is adjusted within the high temperature blower allowed band.
Outer preheating tube of the present utility model can be brickwork construction.The utility model also can be transformed on the former iron chimney of haveing been friends in the past, and is about to original chimney and just can as inner chimney.
After the utility model adopts said structure, because the high-temperature flue gas that the flame reverberatory furnace produces passes through flue, inner chimney is from bottom to top in the time of airborne release, from the outer preheating tube air at room temperature that enters suitable for reading along heat exchanging fin screw current downflow, both do relative motion at the inner chimney wall of being separated by, fully carry out heat exchange, preheated air arrives outer preheating tube air outlet can be warming up to 100～250 ℃, thereby the waste heat that has made full use of high-temperature flue gas comes the preheating chamber warm air, make air at room temperature before entering burner hearth, have uniform temperature, thereby reduced energy consumption effectively, saved fuel; In heat exchanging process, reduce the exhaust temperature of high-temperature flue gas relatively simultaneously, alleviated the environmental pollution degree.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the utility model structural representation.
Accompanying drawing 1 has been described the applicable cases of the utility model in the flame reverberatory furnace. The flame reverberatory furnace produces High-temperature flue gas through flue 10, inner chimney 5 to airborne release, when it from bottom to top flows in inner chimney 5 Wall and heat exchanging fin 4 by inner chimney 5 dispel the heat to skin; Air at room temperature advances from outer preheating tube 6 is suitable for reading Enter along heat exchanging fin 4 screw current downflow until outside the air outlet of preheating tube 6, with the inner chimney 5 that has heated Outside wall surface and heat exchanging fin 4 fully carry out heat exchange, air at room temperature obtains preheating. If preheated air Temperature surpasses the permission scope of application of high temperature blower 9, then before it enters high temperature blower, and open cold Control valve 8 on the airduct 7 is put into a certain amount of air at room temperature, makes the temperature of preheated air be lower than high-temperature blast The permission serviceability temperature upper limit of machine 9; If preheated air temperature is within the high temperature blower allowed band, then Do not need temperature adjustment. The preheated air that meets temperature requirement is sent by high temperature blower 9, iron pipe 12 through iron pipe 11 Enter nozzle, after nozzle exit and fuel mix, spray into hearth combustion.
Following examples have proved absolutely the utility model.
Implement the utility model in the molten aluminium stove of certain 6 tons of fuel oils (diesel regenerated) flame reflection, iron inner chimney 5 is high 15 meters, 0.42 meter of external diameter, and flue 10 length are 10 meters; The outer surface of inner chimney 5 is welded with the heat exchanging fin 4 that thickness is 5 millimeters the following arrangement of screw, and the helical angle of heat exchanging fin 4 is 30 degree, and pitch is 242 millimeters, highly is 150 millimeters, and starting point is over against the air outlet of outer preheating tube 6 under it; Outer preheating tube 6 is with 6 millimeters thick welded steel plates, and 0.84 meter of internal diameter, its outer surface are covered with 50 millimeters thick alumina silicate fibres and add the heat-insulation layer that asbestos cloth twines; 2 kilograms of high temperature blower 9 blast, heat-resisting 250 ℃, 3500 cubic metres/hour of air quantity; About 150 ℃ of preheated air temperature average out tos; Compare with former common chimney, the discharge temperature of high-temperature flue gas is reduced to about 650 ℃ by original about 720 ℃, every stove smelting time shortens 2～3 hours, boost productivity more than 25% 20 kilograms of molten 1 ton of fuel-economizings of aluminium, every stove fuel-economizing 120 kg, by melting every day 1 stove, work in every month 25 days, annual work 11 months, 1800 yuan of/ton calculating of oil price, but 33 tons of fuel-economizings in every year reduce production costs 5.94 ten thousand yuan, when saving the smelter 550 hours.
Claims (7)
1. iron chimney of flame reverberatory furnace, it is characterized in that: the utility model is a double-decker, comprise the internal layer of discharging reverberatory furnace high-temperature flue gas and the skin of preheating chamber warm air, internal layer comprises rainhat (1), iron inner chimney (5), flue (10), skin comprise rainhat (2), inner chimney (5) outside wall surface, be welded on heat exchanging fin (4) under inner chimney (5) the outside wall surface screw, install and be positioned at the peripheral iron outer preheating tube (6) of inner chimney (5) with inner chimney (5) coaxial line.
2. chimney according to claim 1 is characterized in that: the helical angle of heat exchanging fin (4) is 30～45 degree.
3. chimney according to claim 1 is characterized in that: outer preheating tube (6) internal diameter is 1.5～2.5 times of inner chimney (5) external diameter.
4. chimney according to claim 1 is characterized in that: outer preheating tube (6) is suitable for reading to be lower than 2～3 meters suitable for reading of inner chimney (5).
5. chimney according to claim 1 is characterized in that: outer preheating tube (6) outer surface lays heat-insulation layer.
6. chimney according to claim 1 is characterized in that: the lower end of outer preheating tube (6) is provided with air outlet, and air outlet links to each other with the air inlet of high temperature blower (9) by the iron pipe (11) that lays heat-insulation layer.
7. chimney according to claim 6 is characterized in that: iron pipe (11) is provided with the cool air hose (7) of band control valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95238214 CN2258585Y (en) | 1995-12-12 | 1995-12-12 | Double-layer iron chimney capable of utilizing waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95238214 CN2258585Y (en) | 1995-12-12 | 1995-12-12 | Double-layer iron chimney capable of utilizing waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2258585Y true CN2258585Y (en) | 1997-07-30 |
Family
ID=33880709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95238214 Expired - Fee Related CN2258585Y (en) | 1995-12-12 | 1995-12-12 | Double-layer iron chimney capable of utilizing waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2258585Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734815A (en) * | 2012-06-14 | 2012-10-17 | 安徽沃木采暖科技有限公司 | Spinning double-layer rainproof device |
| CN103423756A (en) * | 2013-07-19 | 2013-12-04 | 东南大学 | Composite material chimney connection joint and method |
| CN108613207A (en) * | 2018-07-17 | 2018-10-02 | 天津市丰源燃气热力工程设计有限公司 | A kind of external wall type air preheat steel stack |
-
1995
- 1995-12-12 CN CN 95238214 patent/CN2258585Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734815A (en) * | 2012-06-14 | 2012-10-17 | 安徽沃木采暖科技有限公司 | Spinning double-layer rainproof device |
| CN103423756A (en) * | 2013-07-19 | 2013-12-04 | 东南大学 | Composite material chimney connection joint and method |
| CN103423756B (en) * | 2013-07-19 | 2015-09-23 | 东南大学 | A kind of composite material chimney connection joint and method |
| CN108613207A (en) * | 2018-07-17 | 2018-10-02 | 天津市丰源燃气热力工程设计有限公司 | A kind of external wall type air preheat steel stack |
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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 |