CN2699220Y - Vertical boiling type sand calcining furnace - Google Patents
Vertical boiling type sand calcining furnace Download PDFInfo
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- CN2699220Y CN2699220Y CN 200420026356 CN200420026356U CN2699220Y CN 2699220 Y CN2699220 Y CN 2699220Y CN 200420026356 CN200420026356 CN 200420026356 CN 200420026356 U CN200420026356 U CN 200420026356U CN 2699220 Y CN2699220 Y CN 2699220Y
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- flue gas
- chamber
- sand
- calcining furnace
- burner
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model relates to a vertical boiling type sand calcining furnace used in sodium silicate sand and cast resin-bonded sand thermal reclamation process, which comprises a furnace body 2, a burner 3, a blower 4 and a material dropping device 1. The upper part of the furnace body 2 is provided with a material dropping chamber 21; the middle part of the furnace body is provided with a furnace chamber 22; the lower part of the furnace body is provided with a blast chamber 23. A furnace bed 221 is transversally separated and arranged inside the furnace chamber 22; the lower side wall of the blast chamber 23 is provided with the burner 3, and the upper side wall of the blast chamber is provided with a flue gas inlet 231 which is connected with a flue gas outlet pipe 41 of the blower 4; the side wall of the material dropping chamber 21 is provided with a flue gas outlet 211 which is connected with a flue gas inlet pipe 42 of the blower; the lower part of the blast chamber 23 is provided with a material discharging device 232; the material dropping device 1 is arranged at the upper part of the material dropping chamber 21. The utility model has the advantages of high thermal efficiency, reliable operation, convenient maintenance, low flue-gas temperature and homogeneous calcining.
Description
Technical field:
The utility model relates to a kind of vertical boiling type sand calcining furnace that is used for water-glass sand, casting resin sand thermal reclamation processing.
Background technology:
After casting resin sand uses, still residual large amount of organic in the sand, directly Recycling.For removing the organic matter in the old resin sand, make the regenerating used reuse, adopted many processing methods both at home and abroad, wherein the most frequently used is vertical high temperature sand roaster.Mainly there is following deficiency in it:
1, utilize flue gas and refractory material to conduct heat, the thermal efficiency is lower, only reaches 65%;
2, adopt refractory brick to build the burner hearth flue by laying bricks or stones, refractory brick is fragile, and maintainability is poor, and fault power time is long;
3, useless flue-gas temperature is higher, reaches 320 ℃, and is difficult to control, influences the thermal efficiency;
4, there is a small amount of sand short circuit phenomenon in pulse material transfer, and roasting is inhomogeneous.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, a kind of thermal efficiency height is provided, uses reliable, easy to maintenance, the uniform vertical boiling type sand calcining furnace of roasting.
The purpose of this utility model is achieved in that a kind of vertical boiling type sand calcining furnace, comprise body of heater, burner, air blast and doffer, upper of furnace body is the blanking chamber, the middle part is a burner hearth, the bottom is the combustion chamber, laterally separate in the burner hearth and be provided with siege, install burner on the lower wall of combustion chamber, upper side wall is provided with gas approach, this gas approach connects the air blast smoke outlet tube, on the sidewall of blanking chamber exhanst gas outlet is set, this exhanst gas outlet connects the air blast flue gas inlet tube, and like this, the combustion chamber just is divided into combustion zone, bottom and flue gas mixed zone, top, the bottom, combustion chamber is provided with drawing mechanism, and doffer is arranged at top, blanking chamber.
Old resin sand on siege by roasting, when high-temperature flue gas that burner combustion produces and secondary recovery flue gas after mix the mixed zone, enter burner hearth heating old sand, the air velocity of high-temperature flue gas in burner hearth, make sand grains be in half on siege and suspend that is fluidized state, flue gas and sand grains carry out fully, heat exchange uniformly thereby make.The hot sand that falls through siege further obtains baking heat by high temperature combustion zone the time.
Siege of the present utility model is the staggered stack grid of forming of heat resisting steel, forms and disperses tortuous exhaust gases passes.
Compare with existing vertical high temperature sand roaster, the utlity model has following advantage:
1, utilize the direct contact heat-exchanging of flue gas and old sand, under the effect of high-temperature flue gas stream, the sand fluidized state adds thermal bake-out, and the thermal efficiency is up to 75%.
2, siege adopts heat resisting steel to make, and is sturdy and durable, simple in structure, uses reliably, and it is convenient to change, and maintenance capacity is few.
3, old sand further is subjected to the flame calcination in the combustion zone, and skin covering of the surface is more fragile, for follow-up mechanical type demoulding is created essential condition,
4, flue gas recirculation is used, and useless flue-gas temperature can be controlled in below 200 ℃.
Description of drawings:
Fig. 1 is an outside drawing of the present utility model.
Fig. 2 is a furnace binding schematic diagram of the present utility model.
The specific embodiment:
As Fig. 1～2, the utility model is a kind of vertical boiling type sand calcining furnace.Mainly form by body of heater 2, burner 3, air blast 4 and doffer 1.Body of heater 2 tops are that blanking chamber 21, middle part are that burner hearth 22, bottom are combustion chamber 23.Burner hearth 22 is main region of old sand and flue gas heat exchange.Laterally separate in the burner hearth 22 and be provided with siege 221, siege 221 forms the exhaust gases passes that disperses complications for the staggered stack grid of forming of heat resisting steel, old resin sand on siege 221 by roasting.Device burner 3 on 23 lower wall of combustion chamber, upper side wall is provided with gas approach 231, and this gas approach 231 connects air blast 4 smoke outlet tubes 41, on 21 sidewalls of blanking chamber exhanst gas outlet 211 is set, and this exhanst gas outlet 211 connects air blast flue gas inlet tube 42.Like this, combustion chamber 23 just is divided into combustion zone, bottom (1400～1600 ℃ of high-temperature regions) and flue gas mixed zone, top (more than 650～750 ℃) two districts, when high-temperature flue gas that burner combustion produces and secondary recovery flue gas after mix the mixed zone, enter burner hearth heating old sand, the air velocity of high-temperature flue gas in burner hearth, make sand grains be in half in exhaust gases passes and suspend that is fluidized state, flue gas and sand grains carry out fully, heat exchange uniformly thereby make.The hot sand that falls through stack grid siege 221 further obtains baking heat by high temperature combustion zone the time.23 bottoms, combustion chamber are provided with drawing mechanism 232.Drawing mechanism 232 adopts hopper 2321 to add twin-stage Weight type valve 2322 structures, can prevent effectively that flue gas from escaping.
Doffer 1 is arranged at 21 tops, blanking chamber, is made up of quantitative pneumatic valve plate 12 and branch flow cone 11.Can make old sand become the disperse shape to add burner hearth equably, the shunting wimble fraction directly contacts the effect of having played the preheating old sand with flue gas.
In the hopper 2321 of blanking chamber 21, combustion chamber 23 and drawing mechanism 232, temperature measuring equipment 5 is set all, feeds back to control system to adjust the quantity combusted of combustion system.
The utility model adopts the fluosolids roasting mode of heating, this equipment can change exchange with old sand and 650～750 ℃ of abundant convection current of high-temperature flue gas of normal temperature state effectively, sand grains contacts roasting in short-term with thermal-flame (1400～1600 ℃) and further heating, old sand temperature＞300～400 after roasting ℃, the old sand skin covering of the surface is damaged, because this stove makes full use of heat energy, the thermal efficiency reaches more than 70～75%.
This roaster reliable in structure, the inner maintenance capacity of body of heater is very little in the running, and refractory material adopts the quality refractory clay brick and high-alumina brick is thorough builds, the flue grid adopts heat resisting steel, when needs keep in repair body of heater inside, only need remove doffer and get final product, very convenient.
Claims (4)
1, a kind of vertical boiling type sand calcining furnace, it is characterized in that it comprises body of heater (2), burner (3), air blast (4) and doffer (1), body of heater (2) top is blanking chamber (21), the middle part is burner hearth (22), the bottom is combustion chamber (23), laterally separate in the burner hearth (22) and be provided with siege (221), install burner (3) on the lower wall of combustion chamber (23), upper side wall is provided with flue gas and enters (231), this gas approach (23) connects air blast (4) smoke outlet tube (41), on the sidewall of blanking chamber (21) flue gas is set and (211), this flue gas goes out (211) and connects air blast flue gas inlet tube (42), bottom, combustion chamber (23) is provided with drawing mechanism (232), and doffer (1) is arranged at top, blanking chamber (21).
2, a kind of vertical boiling type sand calcining furnace according to claim 1 is characterized in that siege (221) is multilayer stack grid.
3, a kind of vertical boiling type sand calcining furnace according to claim 1 is characterized in that doffer (1) comprises quantitative pneumatic valve plate (12) and divides flow cone (11).
4, a kind of vertical boiling type sand calcining furnace according to claim 1 is characterized in that drawing mechanism (232) adopts hopper (2321) to add twin-stage Weight type valve (2322) structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026356 CN2699220Y (en) | 2004-04-16 | 2004-04-16 | Vertical boiling type sand calcining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420026356 CN2699220Y (en) | 2004-04-16 | 2004-04-16 | Vertical boiling type sand calcining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2699220Y true CN2699220Y (en) | 2005-05-11 |
Family
ID=34771212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420026356 Expired - Fee Related CN2699220Y (en) | 2004-04-16 | 2004-04-16 | Vertical boiling type sand calcining furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2699220Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443022A (en) * | 2018-12-14 | 2019-03-08 | 大峘集团有限公司 | A kind of pushing-type multilayer furnace apparatus for the processing of steel plant's ion dust mud contaning |
-
2004
- 2004-04-16 CN CN 200420026356 patent/CN2699220Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443022A (en) * | 2018-12-14 | 2019-03-08 | 大峘集团有限公司 | A kind of pushing-type multilayer furnace apparatus for the processing of steel plant's ion dust mud contaning |
| CN109443022B (en) * | 2018-12-14 | 2024-01-05 | 大峘集团有限公司 | Push type multi-layer furnace device for iron-containing dust and mud treatment of iron and steel plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050511 Termination date: 20130416 |