CN2177925Y - High-temp. pot-string type waste steel preheating device - Google Patents
High-temp. pot-string type waste steel preheating device Download PDFInfo
- Publication number
- CN2177925Y CN2177925Y CN 93246990 CN93246990U CN2177925Y CN 2177925 Y CN2177925 Y CN 2177925Y CN 93246990 CN93246990 CN 93246990 CN 93246990 U CN93246990 U CN 93246990U CN 2177925 Y CN2177925 Y CN 2177925Y
- Authority
- CN
- China
- Prior art keywords
- batch
- preheating
- electric arc
- flue gas
- string type
- 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
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- 229910000831 Steel Inorganic materials 0.000 title abstract description 12
- 239000010959 steel Substances 0.000 title abstract description 12
- 239000002699 waste material Substances 0.000 title abstract description 3
- 238000010891 electric arc Methods 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 23
- 239000003546 flue gas Substances 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000779 smoke Substances 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000009628 steelmaking Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012802 pre-warming Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 206010011416 Croup infectious Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011022 operating instruction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Furnace Details (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The utility model relates to a high-temperature pot-string type waste steel preheating device, which is composed of an electric arc furnace, material preheating pipes, and a connecting pipe. The utility model is characterized in that more than two material preheating pipes are arranged, and each material preheating pipe is connected in series; the inlet of the first material preheating pipe is connected with the high temperature smoke outlet of the electric arc furnace, and the smoke outlet of the last material preheating pipe is connected with a deduster. The utility model has the advantages that the power consumption of steel producing is greatly reduced, the consumption of electrodes and fireproof materials are both decreased, power efficiency is enhanced, and the producing time is shortened by about eight percent.
Description
The utility model relates to a kind of high temperature pot-string type preheating scrap device.Be used to recycle the heat energy of the high-temperature flue gas that electrical arc furnace discharges, reach the energy-conservation purpose of electric furnace steel making.
" the NKK scrap preheater " of NKK's development is made up of electric arc furnaces, water-cooled combustion chamber, preheating chamber, batch can, circulating fan and connecting pipeline.The flue gas that produces by electric furnace steel making, earlier behind the water-cooled combustion chamber, enter preheating chamber again and in preheating chamber the steel scrap in the batch can carry out heat exchange, it belongs to the low-temperature prewarming device of pre-heat utilization after the first cooled flue gas.First jar of material of its first preheating, charging again after hanging away or drawing off, second jar of material of preheating afterwards belongs to the interruption preheating.Because it belongs to the low-temperature prewarming device, the flue gas mean temperature that is utilized is 325-400 ℃, so very unfavorable to the heat energy that reclaims flue gas.
The high temperature preheating steel scrap device of Germany Krupp industrial technology company development, it is made up of electric furnace, combustion chamber, preheating chamber, batch can, heat exchanger, air exhauster and connecting pipeline etc.The flue gas that is produced by electric furnace steel making directly enters the combustion chamber, after fully burning in the combustion chamber, directly enter preheating chamber again and remove to heat steel scrap in the batch can, then through heat exchanger and air exhauster to deduster.This preheating device also belongs to the interruption preheating.It is earlier pre-heat utilization, and back cooled flue gas claims high temperature preheating, and it is heated to about 550 ℃ with steel scrap, and can reclaim the waste gas sensible heat as far as possible.
In above-mentioned two kinds of scrap preheaters, second kind flue gas heat energy recovery rate obviously is higher than first kind, but still has its weak point: the first, the rate of recovery still can improve 5-10%; The second, the high temperature of high-temperature flue gas still has 50-100 ℃ to fail to utilize; Three, discharge flue-gas temperature from preheating chamber and still have 400-700 ℃ to fail to utilize, the way that its adopts heat exchanger and sneaks into cold air reduces exhaust temperature.
The purpose of this utility model is at above-mentioned shortcoming of the prior art, and a kind of high temperature pot-string type preheating scrap device is provided.
The purpose of this utility model is achieved in that
A kind of high temperature pot-string type preheating scrap device of forming by electric arc furnaces, preheating batch can and connecting pipeline, its design feature is that the preheating batch can is more than 2, and each preheating batch can is a coupled in series, the inlet of first preheating batch can connects the high-temperature flue gas outlet of electric arc furnaces, and the exhanst gas outlet of last preheating batch can connects dust arrester.
Another embodiment of the present utility model is on the basis of such scheme, sets up the combustion chamber between electric arc furnaces and first preheating batch can.
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is a front view of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
By as can be known embodiment illustrated in fig. 1, it is made up of electric furnace 1, preheating batch can 3, connecting pipeline, connecting gear, jacking mechanism, detent mechanism etc., the preheating batch can is composed in series by 4, the inlet of first preheating batch can connects the high-temperature flue gas outlet of electric arc furnaces, and the exhanst gas outlet of last preheating batch can connects dust arrester.
Preheating batch can 3 is made up of petticoat pipe in the activity 6, batch can main body and movable petticoat pipe 15 down.Connecting gear is made up of batch can car 9, top-pushing mechanism 10, guide rail 19 and support frame 12.Jacking mechanism is positioned at the below of each preheating batch can, sits with the 15 joining movable flue gas tube connectors 20 of petticoat pipe under the activity of each preheating batch can be contained on the jacking mechanism, and jacking mechanism is made up of jack-up oil cylinder 14, platform 21 and guide rail 22.Detent mechanism 11 is contained on the support frame 12, it be positioned at each preheating batch can and the corresponding position of batch can car on, detent mechanism is made up of oil cylinder 23 and the triangle channel 24 that is positioned on the batch can car.Among the figure, 2 is the water-cooled bend pipe, and 4 is No. 1 high-temperature valve, and 5 is No. 4 high-temperature valves, and 7 is No. 2 high-temperature valves, and 8 is that No. 3 valves, 13 are unloading valve, and 16 for keeping off a car mechanism, and 17 is movable transfer box, and 18 is movable smoke pipe.
The operating instruction of this high temperature pot-string type preheating scrap device:
1, generally adorns two jars of material by smelting one heat steel.
2, install the batch can of steel scrap, move to No. 3, No. 2, No. 1 jar position successively from No. 4 jar positions.
3, high-temperature flue gas (high temperature 1000-1250 ℃, low temperature 700-800 ℃, Continuous Flow is crossed from low to high) at first enters the jar position No. 1, is 2,3,4 jars successively, and the flue gas of extracting out from No. 4 jars is sent to deduster.
4, to the requirement of process equipment, pipeline:
(1) No. 4 jar and before equipment, conduit enclosure temperature≤50 ℃.
(2) each connecting link is wanted strict good seal, stand 600-700mmH
2The suction of O post.
(3) 40 tons and above high power electric furnace are established 4 batch can continuously pre-heatings, and 30 tons to 10 tons electric furnaces are established 3 batch cans, because of in the flue-gas temperature of electric rangette low.
The utility model preheating technology process conditions are as follows:
1, enters the preheating chamber flue-gas temperature of (referring to batch can): heat of oxidation melting stage
600℃－1250℃
2, connect preheating batch can number simultaneously: the 1st jar of material: go into 1200 ℃-1250 ℃
Go out 900 ℃
The 2nd jar of material: go into 900 ℃
Go out 600 ℃
The 3rd jar of material: go into 600 ℃
Go out 350 ℃
The 4th jar of material: go into 350 ℃
Go out 150 ℃
3, enter the exhaust gas volumn of preheating chamber: 70-75% is arranged approximately
4, reclaim the sensible heat amount of flue gas: 65-75% is arranged approximately
Economic benefit of the present utility model:
The utility model has the advantages that and to recycle fully the 65-75% that flue gas in the EAF Steelmaking Process is taken away heat energy, and by in the hot scrap steel band freshening steel electric furnace, the steel-making power consumption is reduced, reduce simultaneously electrode and refractory consumption rate, improve the thermal efficiency and shorten the heat about 8%. Electric furnace flue gas is taken away in the 10-20% situation that heat energy accounts for overall balance heat energy, and corresponding to save electric energy be 40-105kwh/t, saves electrode 0.3-0.8kg/t. This device has been broken through flue gas and has been taken away heat energy and be lower than 15% conclusion that just is unworthy reclaiming preheating scrap. Low, the remarkable in economical benefits of this device operating cost.
Claims (6)
1, a kind of high temperature pot-string type preheating scrap device of forming by electric arc furnaces, preheating batch can and connecting pipeline, it is characterized in that the preheating batch can is more than 2, and each preheating batch can is for being connected in series, the inlet of first preheating batch can connects the high-temperature flue gas outlet of electric arc furnaces, and the exhanst gas outlet of last preheating batch can connects dust arrester.
2, device according to claim 1 is characterized in that between electric arc furnaces and first preheating batch can the combustion chamber being housed.
3, device according to claim 1 and 2 is characterized in that the preheating batch can plays petticoat pipe to form by petticoat pipe, batch can main body, activity in the activity.
4, device according to claim 3 is characterized in that it is provided with connecting gear, and connecting gear is made up of batch can car, top-pushing mechanism, guide rail and support frame.
5, device according to claim 3, it is characterized in that with each preheating batch can activity under the joining movable flue gas tube connector of petticoat pipe sit and be contained on the jacking mechanism, jacking mechanism is made up of jack-up oil cylinder, platform and guide rail.
6, device according to claim 5 is characterized in that being provided with detent mechanism on the support frame with on each preheating batch can and the corresponding position of batch can car, and detent mechanism is made up of oil cylinder and the triangle channel that is positioned on the batch can car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246990 CN2177925Y (en) | 1993-12-09 | 1993-12-09 | High-temp. pot-string type waste steel preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246990 CN2177925Y (en) | 1993-12-09 | 1993-12-09 | High-temp. pot-string type waste steel preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2177925Y true CN2177925Y (en) | 1994-09-21 |
Family
ID=33819509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93246990 Expired - Fee Related CN2177925Y (en) | 1993-12-09 | 1993-12-09 | High-temp. pot-string type waste steel preheating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2177925Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102662C (en) * | 1997-11-27 | 2003-03-05 | Sms舒路曼-斯玛公司 | Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases |
| CN103822489A (en) * | 2014-03-21 | 2014-05-28 | 张昌剑 | Waste-steel continuous preheating method and waste-steel continuous preheating device |
-
1993
- 1993-12-09 CN CN 93246990 patent/CN2177925Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102662C (en) * | 1997-11-27 | 2003-03-05 | Sms舒路曼-斯玛公司 | Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases |
| CN103822489A (en) * | 2014-03-21 | 2014-05-28 | 张昌剑 | Waste-steel continuous preheating method and waste-steel continuous preheating device |
| CN103822489B (en) * | 2014-03-21 | 2015-07-01 | 张昌剑 | Waste-steel continuous preheating method and waste-steel continuous preheating device |
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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 |