CN202786028U - Active lime pre-decomposing furnace device - Google Patents
Active lime pre-decomposing furnace device Download PDFInfo
- Publication number
- CN202786028U CN202786028U CN 201220357726 CN201220357726U CN202786028U CN 202786028 U CN202786028 U CN 202786028U CN 201220357726 CN201220357726 CN 201220357726 CN 201220357726 U CN201220357726 U CN 201220357726U CN 202786028 U CN202786028 U CN 202786028U
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- heat exchange
- combustion chamber
- wingdale
- exchange zone
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Abstract
The utility model discloses an active lime pre-decomposing furnace device, which is used for preheating and pre-decomposing limestone raw materials before entering a rotary kiln for calcining. The active lime pre-decomposing furnace device comprises a furnace body, a combustion chamber, heat exchange regions and limestone staying regions are arranged inside the furnace body, a gas-material channel is arranged at the bottom of the furnace body, the combustion chamber is arranged in the furnace body and above the gas-material channel, heat exchange regions which are independent from one another are evenly distributed at the periphery of the furnace body, and smoke outlets communicating the outside with the interior of the furnace body are arranged at the top of the heat exchange regions; mixed smoke channels are respectively arranged between the heat exchange regions at the periphery and the combustion chamber correspondingly and used for communicating the combustion chamber with the heat exchange regions, the limestone staying regions are arranged right below the heat exchange regions, and push rod devices are arranged on the outer side walls of the limestone staying regions. According to the active lime pre-decomposing furnace device, the heat exchange efficiency of an active lime calcining system can be greatly improved and the heat loss of the system can be reduced.
Description
Technical field
The utility model belongs to quickened lime calcining field, is specifically related to a kind of quickened lime predecomposition furnace device, is used for the preheating of quickened lime calcination system and the predecomposition quickened lime of rotary kiln.
Background technology
At present, so that its output is high, the active lime calcination quality is good and stablize, can calcine the advantages such as Wingdale of the little grade of 10～40mm with the rotary kiln quickened lime calcination system of shaft preheater, be widely used in the industries such as steel-making, magnesium smelting, calcium carbide, papermaking.Shaft preheater can only be preheating to Wingdale about 900 ℃ in this system, and with the predecomposition to 20% of Wingdale～25%, and the decomposition of 75%～80% Wingdale enters in the rotary kiln and finishes.Because the limestone calcination in the rotary kiln mainly is the not high radiation heat transfer of thermo-efficiency, the surface radiating of cylinder of rotary kiln is excessive, causes system energy consumption to increase.And the primary heater unit of rotary kiln quickened lime calcination system mainly is take convective heat exchange as main, and Wingdale and flue gas contact gear ratio surface-area are large, and heat exchange efficiency is high, but flue gas is relatively large by the resistance of Wingdale.Therefore, how to avoid the hear rate in the quickened lime calcination process high, flue gas is problem demanding prompt solution in the prior art to the resistance of Wingdale when reducing heat exchange.
Summary of the invention
In order to solve problems of the prior art, the purpose of this utility model provides a kind of quickened lime predecomposition furnace device, can greatly improve the heat exchange efficiency in the quickened lime calcination system, reduces system's hear rate.
In order to realize the foregoing invention purpose, the utility model adopts following technical scheme:
A kind of quickened lime predecomposition furnace device, be used for preheating and predecomposition before the Wingdale raw material enters calcined by rotary kiln, comprise body of heater, body of heater inside is provided with combustion chamber, heat exchange zone and Wingdale stacking area, the bottom of body of heater offers gas material passage, in body of heater and be positioned at gas material passage above be provided with the combustion chamber, in body of heater around the uniform independently heat exchange zone that is provided with each other, the top of heat exchange zone is provided with the exhanst gas outlet that is communicated with extraneous and body of heater inside; Be respectively arranged with corresponding mixed flue gas passage between heat exchange zone all around and the combustion chamber, the mixed flue gas passage is used for being communicated with combustion chamber and heat exchange zone, under heat exchange zone, be provided with the Wingdale stacking area, be provided with push rod device on the outer side wall of Wingdale stacking area.
For implementing better the invention, the top of described heat exchange zone also is provided with opening for feed.
Owing to adopt technique scheme, the utlity model has following superiority:
1, simple in structure, flue gas is to mix in the mixed flue gas passage in body of heater first in the high-temperature flue gas that produces in the utility model predecomposition furnace and the rotary kiln, and then Wingdale is carried out preheating.Distinguish first the preheating Wingdale with respect to above-mentioned two kinds of flue gases, when the structure formation of the common preheating Wingdale of rear remix, this structure can guarantee the high predecomposition rate of predecomposition furnace sodalime stone, structure was more simple.
2, the resistance of mixed flue gas does not significantly increase, the flue gas that produces in the rotary kiln that mixes in the mixed flue gas passage in the body of heater and the high-temperature flue gas that produces after the combust fuel of the combustion chamber of body of heater inside significantly do not improve by the height of the bed of material of Wingdale, so the resistance that mixed flue gas flows does not significantly increase.Therefore predecomposition furnace device of the present utility model is not significantly to increase the reduction that the flow of flue gas resistance exchanges system's hear rate for, but reduces system's hear rate by the structural modification to the predecomposition furnace device.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Among the figure: 1-gas material passage; The 2-combustion chamber; 3-mixed flue gas passage; The 4-heat exchange zone; The 5-opening for feed; The 6-exhanst gas outlet; The 7-push rod device; 8-Wingdale stacking area.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
In conjunction with Fig. 1, a kind of quickened lime predecomposition furnace device, be used for preheating and predecomposition before the Wingdale raw material enters calcined by rotary kiln, comprise body of heater, body of heater inside is provided with combustion chamber 2, heat exchange zone 4 and Wingdale stacking area 8, the bottom of body of heater offers gas material passage 1, in body of heater and be positioned at gas material passage 1 above be provided with combustion chamber 2, the uniform independently heat exchange zone 4 that is provided with each other around in body of heater, the top of heat exchange zone 4 are provided with the exhanst gas outlet 6 that is communicated with extraneous and body of heater inside; Be respectively arranged with corresponding mixed flue gas passage 3 between heat exchange zone 4 all around and the combustion chamber 2, mixed flue gas passage 3 is used for being communicated with combustion chamber 2 and heat exchange zone 4, under heat exchange zone 4, be provided with Wingdale stacking area 8, be provided with push rod device 7 on the outer side wall of Wingdale stacking area 8.The top of described heat exchange zone 4 also is provided with opening for feed 5.
The action principle of predecomposition furnace device of the present utility model is: utilize the flue gas that produces in the rotary kiln that enters in the body of heater and the high-temperature flue gas that produces after 2 combust fuel of the combustion chamber of body of heater inside, two kinds of flue gases enter heat exchange zone 4 after the 3 interior mixing of mixed flue gas passage, then carry out preliminary convective heat exchange with the Wingdale raw material that enters from opening for feed 5, mixed flue gas after the heat exchange is discharged from exhanst gas outlet 6, Wingdale raw material after preliminary heat exchange drops to Wingdale stacking area 8 and does further preheating and predecomposition, the heat exchange form of Wingdale in the stacking area is mainly thermal conduction and the Wingdale thermal conduction from outside to inside itself between the Wingdale, by the further heat exchange in the Wingdale stacking area, can be so that the Wingdale raw material self obtain sufficient preheating and predecomposition, push air inlet material passage by the Wingdale raw material of push rod device after with preheating and predecomposition at last and enter in the rotary kiln via gas material passage and calcine.
The principal character that predecomposition furnace device of the present utility model is different from traditional shaft preheater is:
1, this device band combuster itself is to directly providing heat in the predecomposition furnace, and it and mix first from the flue gas that rotary kiln enters, then jointly to the Wingdale preheating.The flue gas that the heat of tradition preheater all comes from the rotary kiln is supplied with, and these flue-gas temperatures are not high especially.After the flue gas of supplying with in the flue gas of combustion chamber and the rotary kiln mixed, flue-gas temperature significantly improved, and can significantly improve Wingdale and advance the front temperature of rotary kiln and predecomposition rate;
2, in pre-heating cabin, there is Wingdale not participate in dwell regions with the flue gas heat exchange.Although Wingdale is not participated in the heat exchange with flue gas in this section zone, it helps the expansion of limestone surfaces heat ecto-entad, so that the temperature of Wingdale core is improved, is conducive to the calcining of Wingdale.Mixed flue gas by this zone, does not avoid increasing flue gas by the resistance of the bed of material simultaneously.
Claims (2)
1. quickened lime predecomposition furnace device, be used for preheating and predecomposition before the Wingdale raw material enters calcined by rotary kiln, comprise body of heater, it is characterized in that: body of heater inside is provided with combustion chamber (2), heat exchange zone (4) and Wingdale stacking area (8), the bottom of body of heater offers gas material passage (1), in body of heater and be positioned at gas material passage above be provided with combustion chamber (2), the uniform independently heat exchange zone (4) that is provided with each other around in body of heater, the top of heat exchange zone are provided with the exhanst gas outlet (6) that is communicated with extraneous and body of heater inside; Be respectively arranged with corresponding mixed flue gas passage (3) between heat exchange zone all around (4) and combustion chamber (2), the mixed flue gas passage is used for being communicated with combustion chamber and heat exchange zone, under heat exchange zone (4), be provided with Wingdale stacking area (8), be provided with push rod device (7) on the outer side wall of Wingdale stacking area.
2. quickened lime predecomposition furnace device according to claim 1, it is characterized in that: the top of heat exchange zone (4) also is provided with opening for feed (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357726 CN202786028U (en) | 2012-07-24 | 2012-07-24 | Active lime pre-decomposing furnace device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357726 CN202786028U (en) | 2012-07-24 | 2012-07-24 | Active lime pre-decomposing furnace device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202786028U true CN202786028U (en) | 2013-03-13 |
Family
ID=47813333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220357726 Expired - Fee Related CN202786028U (en) | 2012-07-24 | 2012-07-24 | Active lime pre-decomposing furnace device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202786028U (en) |
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2012
- 2012-07-24 CN CN 201220357726 patent/CN202786028U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20200724 |