CN201522188U - Flame-isolated rotary kiln for calcining dolomite - Google Patents
Flame-isolated rotary kiln for calcining dolomite Download PDFInfo
- Publication number
- CN201522188U CN201522188U CN2009201442704U CN200920144270U CN201522188U CN 201522188 U CN201522188 U CN 201522188U CN 2009201442704 U CN2009201442704 U CN 2009201442704U CN 200920144270 U CN200920144270 U CN 200920144270U CN 201522188 U CN201522188 U CN 201522188U
- Authority
- CN
- China
- Prior art keywords
- combustion chamber
- rotary kiln
- communicated
- air
- kiln body
- Prior art date
- 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
Links
- 229910000514 dolomite Inorganic materials 0.000 title claims abstract description 25
- 239000010459 dolomite Substances 0.000 title claims abstract description 25
- 238000001354 calcination Methods 0.000 title claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000002912 waste gas Substances 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 7
- 239000003034 coal gas Substances 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 239000011777 magnesium Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000000428 dust Substances 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Abstract
The utility model relates to dolomite calcining equipment in metal magnesium production process, in particular to a flame-isolated rotary kiln for calcining dolomite. The rotary kiln is characterized by comprising a combustion chamber (3) made of fireproof materials; the combustion chamber (3) is internally provided with at least one burner (8), wherein each burner (8) is communicated with a combustible gas source and a blast blower (11) respectively; the rotary kiln also comprises a combustion chamber draft fan (10); an air inlet of the combustion chamber draft fan (10) is communicated with the inside part of the combustion chamber (3) and an air outlet thereof is communicated with the environmental air; the rotary kiln also comprises a rotary kiln body (2) that passes through the combustion chamber (3); furthermore, two ends of the kiln body (2) are connected with a feeding mechanism and a discharging mechanism respectively, wherein a feeding sealing cover (5) is arranged on the kiln body (2) on the feeding mechanism; and an air outlet of a waste gas draft fan (13) is communicated with the inside part of the feeding sealing cover. The rotary kiln has the advantages of small land occupying, higher heat efficiency, and lower cost for treating dusts.
Description
Technical field
The utility model relates to dolomite calcination equipment, the especially dolomite calcination flame-insulating type rotary kiln in the magnesium metal production technology.
Background technology
Existing dolomite calcination technology mainly is to carry out the calcining of dolomite in interior flame rotary kiln and shaft furnace.The rotary kiln of interior flame heat because in rotary kiln running, fuel combustion produces a large amount of waste gas, adds that dolomite decomposes the waste gas that produces, and all needs to discharge, and waste gas is taken away the waste that a large amount of heats causes the energy on the one hand; On the other hand, in the waste gas discharge process, will take away a large amount of dust, and the dust processing needs to reduce flue-gas temperature, therefore, it is pretty troublesome that the dust in the flue gas is handled.In addition, the CO that when burning zone decomposes, produces of dolomite
2CO with the fuel combustion generation
2The CO that causes burning zone
2Dense, very unfavorable to the decomposition of dolomite, specifically be the CO in the flue gas
2Every increase by 2%, the resolving time of dolomite will increase about 10%.The shaft furnace calcining is except that above-mentioned shortcoming, and its granularity requirements to dolomite is also higher, easily mineral resources is caused waste.
The utility model content
The purpose of this utility model provides a kind of dolomite calcination flame-insulating type rotary kiln, has the higher thermal efficiency, can either fuel savings, can also effectively reduce the discharge capacity of waste gas and dust.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of dolomite calcination flame-insulating type rotary kiln, its special feature is, comprise the combustion chamber that builds up by refractory material, at least one burner is installed in the combustion chamber, wherein each burner is communicated with combustible gas source and air blast respectively, and a combustion chamber air-introduced machine, being communicated with in the air inlet of this combustion chamber air-introduced machine and the combustion chamber, its air outlet is communicated with outside air; Also comprise a rotary kiln body that from the combustion chamber, passes, and the two ends of this kiln body are connected with discharging mechanism with feeding mechanism respectively, wherein on the other kiln body of feeding mechanism, the charging seal closure is installed, the air inlet of one waste gas air-introduced machine is communicated with this charging seal closure is interior, and its air outlet is communicated with outside air.
Wherein feeding mechanism comprises feed bin, and this feed bin is connected in the kiln body by tremie pipe, and gate valve also is installed on tremie pipe.
Wherein discharging mechanism comprises the discharging seal closure that an end is communicated with the kiln body, and the discharge nozzle that links to each other with the discharging seal closure, and gate valve also is installed on this discharge nozzle.
Further, wherein gate valve is a double-flashboard gate valve.
Further, wherein combustible gas source is a coal gas.
The utility model has adopted the flame-insulating type rotary kiln of outer heating, and material moves in kiln, and the charging of kiln and discharging are the structures of sealing, are respectively preheating zone and salband in the front and back of bringing-up section, thereby have saved traditional cooler.In addition since the exhaust gas volumn in the kiln seldom, so the preheating zone is also shorter, so the whole system floor space is less.In bringing-up section, kiln is external to be the combustion chamber that builds up with refractory material, with coal gas is the fuel of heating, and coal gas is through burner combustion, by the structure of combustion chamber, make the very even of Temperature Distribution around the kiln body, like this, the dolomite in the kiln is subjected to kiln body conduction heat on the one hand, is subjected to the radiant heat of kiln body on the one hand, Duo a heating surface than traditional kiln, thereby improved the thermal efficiency.The waste gas that burning produces is discharged through fume extractor, and the heat that waste gas is with in the kiln is simultaneously absorbed by dolomite in the preheating zone and reduced temperature, because its amount is smaller, temperature is low, so the cost of dust processing is also lower.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model.
The specific embodiment
As shown in Figure 1, dolomite is entered in the rotary kiln body 2 through double-flashboard gate valve and tremie pipe 4 by feed bin 6, under 2 turning efforts of kiln body, roll and move forward, absorb simultaneously waste gas with heat, temperature progressively raises, this section is the preheating zone, arrived near the bringing-up section the combustion chamber 3, because kiln body 2 heating-up temperatures are about 1200 ℃, the dolomite temperature raises rapidly, decomposites CO
2, become the active dolomite of calcining, after the salband cooling at 3 rears, combustion chamber, be used for magnesium metal production from discharging seal closure 1 and double-flashboard gate valve discharge.And the CO that decomposes
2Discharge under 13 effects of waste gas air-introduced machine from the charging seal closure 5 interior expansion chambers that form.
Combustible gas source adopts coal gas, coal gas enters burner 8 (quantity of burner can be determined as required voluntarily) through gas piping 12, mix 3 internal combustion afterwards with the air that is blasted by air blast 11 in the combustion chamber, the high-temperature flue gas that produces evenly distributes around kiln body 2 in combustion chamber 3, makes kiln body 2 reach 1200 ℃ high temperature.The flue gas that burning produces is then discharged by combustion chamber air-introduced machine 10.Kiln body 2 adopts the heat-resisting alloy steel manufacturing at present usually, can use for a long time under 1200 ℃ high temperature.Wherein building with the rotary kiln body 2 charging and discharging mechanisms that reach own of combustion chamber 3 all can be adopted existing routine techniques.
Claims (5)
1. dolomite calcination flame-insulating type rotary kiln is characterized in that:
Comprise the combustion chamber (3) that builds up by refractory material, at least one burner (8) is installed in combustion chamber (3), wherein each burner (8) is communicated with combustible gas source and air blast (11) respectively, an and combustion chamber air-introduced machine (10), the air inlet of this combustion chamber air-introduced machine (10) is communicated with combustion chamber (3) are interior, and its air outlet is communicated with outside air;
Also comprise a rotary kiln body (2) that from combustion chamber (3), passes, and the two ends of this kiln body (2) are connected with discharging mechanism with feeding mechanism respectively, wherein on the other kiln body (2) of feeding mechanism, charging seal closure (5) is installed, the air inlet of one waste gas air-introduced machine (13) is communicated with this charging seal closure (5) is interior, and its air outlet is communicated with outside air.
2. dolomite calcination flame-insulating type rotary kiln as claimed in claim 1 is characterized in that:
Wherein feeding mechanism comprises feed bin (6), and this feed bin (6) is connected in the kiln body (2) by tremie pipe (4), and gate valve (7) also is installed on tremie pipe (4).
3. dolomite calcination flame-insulating type rotary kiln as claimed in claim 1 is characterized in that:
Wherein discharging mechanism comprises the discharging seal closure (1) that an end is communicated with kiln body (2), and the discharge nozzle that links to each other with discharging seal closure (1), and gate valve (7) also is installed on this discharge nozzle.
4. as claim 2 or 3 described dolomite calcination flame-insulating type rotary kilns, it is characterized in that:
Wherein gate valve (7) is a double-flashboard gate valve.
5. as any described dolomite calcination flame-insulating type rotary kiln in the claim 1 to 3, it is characterized in that:
Wherein combustible gas source is a coal gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201442704U CN201522188U (en) | 2009-11-13 | 2009-11-13 | Flame-isolated rotary kiln for calcining dolomite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201442704U CN201522188U (en) | 2009-11-13 | 2009-11-13 | Flame-isolated rotary kiln for calcining dolomite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522188U true CN201522188U (en) | 2010-07-07 |
Family
ID=42508366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201442704U Expired - Fee Related CN201522188U (en) | 2009-11-13 | 2009-11-13 | Flame-isolated rotary kiln for calcining dolomite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201522188U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557697A (en) * | 2013-10-30 | 2014-02-05 | 江西自立资源再生有限公司 | Novel rotary kiln |
| CN109870024A (en) * | 2017-12-01 | 2019-06-11 | 上海御盾新材料科技有限公司 | A method of it is burned using energy-saving rotary kiln |
| CN109870023A (en) * | 2017-12-01 | 2019-06-11 | 上海御盾新材料科技有限公司 | A kind of energy-saving rotary kiln |
-
2009
- 2009-11-13 CN CN2009201442704U patent/CN201522188U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557697A (en) * | 2013-10-30 | 2014-02-05 | 江西自立资源再生有限公司 | Novel rotary kiln |
| CN103557697B (en) * | 2013-10-30 | 2015-07-15 | 江西自立环保科技有限公司 | Novel rotary kiln |
| CN109870024A (en) * | 2017-12-01 | 2019-06-11 | 上海御盾新材料科技有限公司 | A method of it is burned using energy-saving rotary kiln |
| CN109870023A (en) * | 2017-12-01 | 2019-06-11 | 上海御盾新材料科技有限公司 | A kind of energy-saving rotary kiln |
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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 |
Granted publication date: 20100707 Termination date: 20141113 |
|
| EXPY | Termination of patent right or utility model |