CN88101167A - Calcining furnace with two kinds of calcining manners - Google Patents
Calcining furnace with two kinds of calcining manners Download PDFInfo
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- CN88101167A CN88101167A CN 88101167 CN88101167A CN88101167A CN 88101167 A CN88101167 A CN 88101167A CN 88101167 CN88101167 CN 88101167 CN 88101167 A CN88101167 A CN 88101167A CN 88101167 A CN88101167 A CN 88101167A
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- calcining
- furnace
- calciner
- pot
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- 238000001354 calcination Methods 0.000 title claims abstract description 62
- 239000000463 material Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 206010022000 influenza Diseases 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- 239000011449 brick Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
本发明公开了一种具有两种煅烧方式的煅烧炭素原料的煅烧炉。现有煅烧炉的煅烧方式是单一的，对于罐式炉，回转窑虽然均可利用原料自含挥发份热值，但煅烧温度最高只能达到1300℃，而电煅烧炉的温度虽然可达2000℃但原料中的挥发份得不到利用。本发明是取其罐式炉，电煅烧炉各自的优点，将二者结合在一起。从而构成具有两种煅烧方式的煅烧炉。The invention discloses a calciner for calcining carbon raw materials with two calcining modes. The calcination method of the existing calcination furnace is single. For the pot furnace and the rotary kiln, although the calorific value of the volatile components contained in the raw materials can be used, the maximum calcination temperature can only reach 1300 ℃, while the temperature of the electric calcination furnace can reach 2000 ℃. ℃ but the volatile matter in the raw material is not utilized. The present invention is to get its pot furnace, the respective advantages of the electric calciner, and combine the two together. Thus, a calciner with two calcining methods is constituted.
Description
The invention relates to a calcining furnace with two calcining modes for calcining carbon materials.
One of the main processes affecting the quality of carbon products is calcination. Currently, there are three main types of equipment used in this process:
the first is a rotary kiln of phi 2200/phi 2500 x 45000 produced by Shanghai Hujiang machinery plant.
The second is a pot furnace, the specification is generally 4 furnace chambers in a group, the furnace chamber loading surface is 1700 x 360 at most, and various combinations can be carried out according to the size of production scale.
The heat sources used by the two calcining furnaces are coal gas and volatile matters overflowing from the raw materials in the calcining process, and the calcining temperature can reach 1300 ℃ at most. The chemical structure of the calcined material can be changed into a planar carbon grid structure from the disordered arrangement of the raw materials, and the finished product is an old-generation product.
The third one is an electric calcining furnace with specification of phi 1930/phi 2280X 6025 and transformer capacity of 1200KVA (the whole technology is introduced from Japan by carbon branch factories of aluminum factories in Guizhou). The furnace has the advantages of realizing high-temperature calcination, wherein the center temperature is 2000 ℃, the edge temperature is 1500 ℃, the chemical structure part of the calcined material is converted into two-dimensional graphite crystal lattices, and the finished products enter second-generation products. However, the furnace has the disadvantages that the calorific value of the volatile matter contained in the raw coal cannot be emptied by white utilization, and the calorific value of the volatile matter is enough to heat the raw material to about 1100 ℃, so that the furnace has high electric energy consumption, large transformer capacity and high primary investment, and a single-phase transformer is adopted, so that the power factor is low, and three-phase imbalance is caused to a power grid.
The three calcining furnaces only have one calcining mode, and the first two calcining modes can utilize the calorific value of volatile components contained in raw materials, but cannot increase the calcining temperature, and do not have calcining quality. The latter method, although high in calcination temperature and qualitatively superior, cannot utilize the calorific value of the volatile components contained in the raw material, and the calorific value is enough to heat the raw material to about 1100 ℃, so that the consumption of electric energy and one-time investment are greatly increased.
The invention aims to provide a calcining furnace which has two calcining modes, saves energy consumption, improves calcining temperature, reduces investment and improves product quality.
The technical scheme of the invention is explained in the following with the accompanying drawings.
FIG. 1 shows a cross-section through the calciner along line J-J of FIG. 2.
Fig. 2 shows a cross-section along the line H-H of fig. 1.
Fig. 3 shows a cross-section along the line I-I of fig. 1.
Fig. 4 shows a cross-section along the line P-P of fig. 2.
FIG. 5 shows an assembled cross-section taken along line A-A, B-B of FIG. 4, respectively.
The calcining furnace provided by the invention has two calcining modes. The structure for realizing the first calcination method is a known pot furnace, and mainly comprises: the structure for realizing the second calcining mode is an electric calcining furnace (12) which consists of three electrodes (19) and a transformer (24), wherein the three electrodes extend into a furnace shell (13) in the horizontal direction and form an angle of 120 degrees with each other, and the electric calcining furnace (12) is arranged on a cooler (15) arranged at the lower part and is provided with an automatic discharger (16). These are supported by a base (11).
The invention provides a calciner, wherein a plurality of heating flame paths (1) and a plurality of pot walls (2) of a pot-type calciner can be respectively supported by corresponding circular arches (9), a sealing device (18) can be arranged at the joint of three electrodes (19) of an electric calciner (12) and a furnace shell (13), a cooler (15) can adopt an inner-forward and outer-reverse annular circular truncated cone structure, the two circular truncated cones are communicated by a plurality of radial water channels (25) and divide a material cavity between the two circular truncated cones into a plurality of equal parts, and arch angles (10) of the circular arches (9) supporting the pot walls (2) of the flame paths (1) are downwards transited to form the connection of the furnace shell (13) and the electric calciner (12).
The calcining furnace provided by the invention adopts carbon bricks except for the circular arch (9), and adopts high-alumina clay bricks and conventional materials in other structures.
The process of the invention comprises the following steps: firstly, a combustion chamber (6) is started, fuel is added for ignition combustion, and a furnace is baked. At the appropriate stage of the oven, the raw material is fed into a hopper (not shown in the figure) on the upper part of the oven and is filled with a charging bucket (3) and an electric calcining chamber (12), and simultaneously, the heat generated by the combustion of the calcining chamber (6) enables a flame path (1) to be continuously heated to gradually heat the raw material in the charging bucket (3), and the volatile matters contained in the raw material overflow when the temperature of the raw material rises to 200-850 ℃. The overflowed volatile components pass through the volatile component overflow outlet (4) and the volatile component main passage (5), and the volatile component pulling plate bricks (20) are operated through the fire probing holes (21) to control the amount of the volatile components entering the first, second and third fire passages, so that the requirement of the calcining temperature system of the first calcining mode is met. After combustion air is heated by the air preheating channel (14), the air quantity entering the combustion air is controlled by the air pulling plate brick (22). The whole hot flue gas flow, the volatile matter gas flow and the combustion air gas flow are formed by the negative pressure of a chimney or a draught fan. When the temperature of the raw material in the charging bucket between the first flame path and the second flame path reaches about 1100 ℃, the volatile matter overflows stably, and a furnace door (7) and an ash door (8) of a combustion chamber can be closed. Thereafter, the lower automatic discharger (16) is started to gradually discharge the previously added raw materials, and the raw materials in the upper hopper (not shown in the figure) are replenished into the material tank (3), at this time, the calciner of the first calcining mode of the utility model is put into normal operation. When the raw materials with the temperature of about 1100 ℃ enter the three electrodes (19) in the three-phase electric calcining furnace (12) after the calcining, the three-phase electric calcining furnace is switched on and powered on, and a transformer (24) for the three-phase furnace feeds large current into the furnace through a bus (23) to continuously heat the raw materials so that the central temperature of the raw materials reaches 2000 ℃, thereby finishing the aim of high-temperature calcining. Then the raw materials enter a six-cavity cooler (15) to be cooled to below 100 ℃, and qualified calcined materials are discharged through an automatic discharger (16). The calcining furnace with two calcining methods provided by the utility model enters a normal operation state. The newly input raw materials enter the charging bucket from a hopper (not shown in the figure) according to the process and sequentially pass through preheating, volatile matter overflowing, calcining, high-temperature calcining, cooling and discharging qualified calcined materials.
The invention has the following advantages due to the adoption of the structure and the process:
1. the high-temperature calcination of the raw materials is realized, so that the quality of the carbon product enters the second generation.
2. The calcination heat in the temperature range of normal temperature to 1100 ℃ is provided by the volatile components contained in the raw materials, so the calcination energy consumption is saved. Therefore, compared with a Japanese single-phase electric calcining furnace, the electric energy is saved, the capacity of the transformer is reduced, and the primary investment is reduced. Meanwhile, the unbalance of the single-phase electric calcining furnace to the power grid is eliminated due to the adoption of three-phase power supply.
3. The best combination of two calcining modes is realized by adopting the charcoal brick arch to support the flue and the charging bucket of the pot type furnace.
4. The bucket width of 260mm is 100mm less than the minimum width of 360mm, which is usually adopted, and although the volume of the bucket is reduced, the heat conduction efficiency is improved, and the yield can be improved by 33 percent in comparison.
5. And the three electrodes (19) and the furnace shell are sealed in a filling manner, so that the sealing property of the furnace is improved.
6. Compared with a single-cavity cooler adopted in the prior art, the six-cavity cooler (16) has the advantages of high cooling efficiency, small occupied space and capability of directly reducing the height of the whole furnace.
7. The opening amount of the flashboard of the discharge hole can be adjusted at will, thereby realizing the stepless adjustment of the discharge amount.
Claims (5)
1. The calcining furnace with two calcining modes is characterized in that:
firstly, the structure for realizing the first calcining mode is a known pot furnace, which mainly comprises: a heating flame path (1), a tank wall (2), a material tank (3), a volatile matter overflow port (4), a volatile matter main path (5), an air preheating path (14) and a starting combustion chamber (6);
secondly, the structure for realizing the second calcining mode is an electric calcining furnace consisting of a furnace shell (13), three electrodes (19) which horizontally extend into the furnace shell and form an angle of 120 degrees with each other and a furnace transformer (24);
and thirdly, a cooler (15) arranged at the lower part and provided with a discharger (16).
2. Calciner with two calcining modes according to claim 1, characterized in that the heating flues (1) and the pot walls of the pot furnace are supported by corresponding domes (9).
3. Calciner with two calcination modes according to claim 1, characterized in that the junction of the electrode (19) and the shell (13) is provided with sealing means (18).
4. The calciner of claim 1 which has two calcining modes, characterized in that the cooler is in the structure of an inner forward and an outer reverse annular circular truncated cones which are communicated by radial water channels, and thereby the material cavity between the two circular truncated cones is divided into a plurality of equal parts.
5. Calciner with two calcining modes according to claims 1, 2, 3 and 4, characterized in that the arches (9) supporting the pot calciner transition downwards towards the angle forming a circular mantle (13) connected to the electric calciner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101167 CN88101167A (en) | 1988-03-04 | 1988-03-04 | Calcining furnace with two kinds of calcining manners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88101167 CN88101167A (en) | 1988-03-04 | 1988-03-04 | Calcining furnace with two kinds of calcining manners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88101167A true CN88101167A (en) | 1988-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88101167 Pending CN88101167A (en) | 1988-03-04 | 1988-03-04 | Calcining furnace with two kinds of calcining manners |
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| CN (1) | CN88101167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427865C (en) * | 2005-09-02 | 2008-10-22 | 沈阳铝镁设计研究院 | Electric Calciner and Electric Calcination Method Using Volatile Matter |
-
1988
- 1988-03-04 CN CN 88101167 patent/CN88101167A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427865C (en) * | 2005-09-02 | 2008-10-22 | 沈阳铝镁设计研究院 | Electric Calciner and Electric Calcination Method Using Volatile Matter |
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