CN203904382U - Gas-based shaft furnace - Google Patents
Gas-based shaft furnace Download PDFInfo
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- CN203904382U CN203904382U CN201420282771.XU CN201420282771U CN203904382U CN 203904382 U CN203904382 U CN 203904382U CN 201420282771 U CN201420282771 U CN 201420282771U CN 203904382 U CN203904382 U CN 203904382U
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- 238000001816 cooling Methods 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000009826 distribution Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 112
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 62
- 239000008188 pellet Substances 0.000 claims description 52
- 230000009467 reduction Effects 0.000 claims description 52
- 238000003860 storage Methods 0.000 claims description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims description 29
- 239000002994 raw material Substances 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 18
- 238000006722 reduction reaction Methods 0.000 description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000012360 testing method Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 229910001873 dinitrogen Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000011946 reduction process Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a gas-based shaft furnace which comprises a shaft furnace body, a material inlet, a reducing product outlet, a reducing gas inlet, a furnace top gas outlet and a reducing room heating assembly, wherein an upper cooling room, a reducing room and a lower cooling room are defined in the shaft furnace body sequentially from top to bottom; the material inlet is formed in the top of the upper cooling room; the reducing product outlet is formed in the bottom of the lower cooling room; the reducing gas inlet is formed in the outer wall of the reducing room; the furnace top gas outlet is formed in the top of the upper cooling room; the reducing room heating assembly is arranged on the outer wall of the reducing room. According to the gas-based shaft furnace disclosed by the embodiment of the utility model, each technological parameter in the production process of the shaft furnace can be simulated systematically and comprehensively, and particularly, the temperature gradient distribution in the shaft furnace in the production process of the shaft furnace can be effectively simulated.
Description
Technical Field
The utility model belongs to the technical field of the metallurgy, particularly, the utility model relates to a gas-based shaft furnace.
Background
The direct reduction iron-making technology is the leading technology of the development of the steel industry, is the trip of the development of the steel industry to get rid of coking coal resources, reduces energy consumption and CO2Discharge, improve the structure of the steel product and improve the quality of the steel product. Direct Reduced Iron (DRI) is a substitute for high-quality scrap steel and is used for producing high-quality pure steelThe iron source raw material which cannot be in shortage is a high-quality coolant for converter steelmaking. The gas-based shaft furnace direct reduction method (MIDREX, HYL and the like) which takes natural gas as energy accounts for about 74.3 percent of the total yield of the direct reduced iron. The production development of the direct reduced iron in China is slow, particularly the gas-based shaft furnace direct reduction iron-making technology is almost blank, and the development of high-quality steel and pure steel and the development of equipment manufacturing industry in China are severely restricted. Therefore, China needs to develop a gas-based shaft furnace direct reduction iron-making technology vigorously, and the development requirements of the steel industry and the manufacturing industry in China are met.
At present, with the shortage of high-grade iron ore resources, low-grade and complex refractory iron ores are gradually used in the iron-making industry, which requires that a gas-based shaft furnace must be adapted to various different varieties of mineral raw materials, thereby ensuring the yield of the shaft furnace and the quality of products. However, the diameter of the existing gas-based shaft furnace production equipment is more than 5 meters, the height of the existing gas-based shaft furnace production equipment is more than 66 meters, more than dozens of tons of materials are put in at one time, and the production equipment is adopted for testing, so that a large amount of resources such as energy, minerals, manpower and the like are consumed. Therefore, the mineral raw materials with different physical properties and metallurgical properties need to be tested through a simulation test, so that reasonable technological parameters are determined, and the production requirement of the gas-based shaft furnace is met. For small-sized equipment for simulation experiments, if the equipment is completely reduced according to large-sized production equipment, the process requirements are not met, and the problems of quick heat dissipation, smooth running, low gas heating efficiency, low gas utilization rate and the like can be caused due to small pipe diameter.
In addition, the existing pellet test detection equipment is only a device with simple structure and single test purpose. For example, the pellet rotating drum and wear index determination (ISO3271), the pellet adhesion index determination (ISO11256), the pellet low-temperature reduction rupture index and the metallization rate determination (ISO11257) all adopt simple reduction reaction tubes and detection devices, a small amount of pellets are added intermittently, the amount of pellets is only about 500g, the reduction parameters are fixed, the simulation performance on the reduction process of the gas-based shaft furnace is not strong, and the purpose of determining reasonable process parameters aiming at different mineral raw materials cannot be realized. Therefore, the development of the gas-based shaft furnace iron-making technology needs a set of small-sized device which can comprehensively simulate the shaft furnace gas-based reduction process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of above-mentioned technical problem to a certain extent at least. Therefore, the utility model discloses an aim at provide one kind can be systematically, each technological parameter in the overall simulation shaft furnace production process, especially can effectively simulate the gas-based shaft furnace that the temperature gradient distributes in the shaft furnace production process.
In one aspect of the present invention, the present invention provides a gas-based shaft furnace. According to the utility model discloses an embodiment, gas base shaft furnace includes:
the shaft furnace comprises a shaft furnace body, wherein an upper cooling chamber, a reduction chamber and a lower cooling chamber are sequentially defined in the shaft furnace body from top to bottom;
a material inlet disposed at a top of the upper cooling chamber;
a reduced product outlet disposed at a bottom of the lower cooling chamber;
a reducing gas inlet provided on an outer wall of the reducing chamber;
a top gas outlet disposed at the top of the upper cooling chamber; and
the reduction chamber heating assembly is arranged on the outer wall of the reduction chamber.
According to the utility model discloses gas base shaft furnace is through setting up reduction chamber heating element at the reduction chamber outer wall to can realize simulating the purpose that temperature gradient distributes in the shaft furnace production process.
In addition, the gas-based shaft furnace according to the above embodiment of the present invention may also have the following additional technical features:
in some embodiments of the present invention, the gas-based shaft furnace further comprises: the device comprises a raw material storage tank, a pellet inlet, a pellet outlet, a first nitrogen inlet and a first nitrogen outlet, wherein the raw material storage tank is provided with the pellet inlet, the pellet outlet, the first nitrogen inlet and the first nitrogen outlet; and the reduction product storage tank is provided with a product feeding hole, a product discharging hole, a second nitrogen inlet and a second nitrogen outlet, wherein the pellet outlet is connected with the material inlet, and the product feeding hole is connected with the reduction product outlet.
In some embodiments of the present invention, the gas-based shaft furnace further comprises: a gas distribution device; the reducing gas pipeline is respectively connected with the gas distribution device and the reducing gas inlet; a reducing gas heating assembly disposed outside the reducing gas pipe. Therefore, the condition of reducing gas entering the shaft furnace in industrial production can be effectively simulated.
In some embodiments of the present invention, the gas-based shaft furnace further comprises a condenser, the condenser being connected to the top gas outlet. Thus, the pollution to the environment can be remarkably reduced.
In some embodiments of the present invention, the reduction chamber heating assembly comprises a plurality of jacketed electric heating furnaces. Therefore, the heating temperature of different sections of the reduction furnace can be effectively controlled.
In some embodiments of the present invention, the outer walls of the upper cooling chamber and the lower cooling chamber are provided with cooling jackets. Therefore, the plate inserting type feeding machine and the plate inserting type discharging machine can be prevented from being damaged due to overhigh temperature.
In some embodiments of the present invention, the gas-based shaft furnace further comprises: the inserting plate type feeding machine is respectively connected with the pellet outlet and the material inlet; and the inserting plate type discharging machine is respectively connected with the reduction product outlet and the product feeding hole.
In some embodiments of the present invention, ball valves are respectively disposed in the pellet inlet, the pellet outlet, the product feed inlet, and the product discharge outlet. Therefore, leakage of the reducing gas can be effectively avoided.
In some embodiments of the present invention, the gas-based shaft furnace further comprises: and the nitrogen replacement device is respectively connected with the first nitrogen inlet and the second nitrogen inlet. Therefore, the reducing gas in the raw material storage tank and the reducing product storage tank can be completely replaced, and the safety of the operators of the device is ensured.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a gas based shaft furnace according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a gas based shaft furnace according to yet another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In one aspect of the present invention, the present invention provides a gas-based shaft furnace. A gas-based shaft furnace according to an embodiment of the present invention will be described in detail with reference to fig. 1-2. According to the utility model discloses an embodiment, gas base shaft furnace includes:
the shaft furnace body 100: according to an embodiment of the present invention, an upper cooling chamber 10, a reduction chamber 11 and a lower cooling chamber 12 are defined in the shaft furnace body 100 in this order from top to bottom. According to an embodiment of the present invention, the top of the upper cooling chamber 10 may be provided with a material inlet 13 for adding reaction material into the shaft furnace body 100. According to an embodiment of the present invention, the bottom of the lower cooling chamber 12 may be provided with a reduction product outlet 14 for discharging the reduction product out of the shaft furnace body 100. According to an embodiment of the present invention, a reducing gas inlet 15 may be provided on an outer wall of the reduction chamber 11 for introducing a reducing gas into the reduction chamber 11 of the shaft furnace body 100 so that a reduction reaction occurs in the reduction chamber 11. According to an embodiment of the present invention, the top of the upper cooling chamber 10 may be provided with a top gas outlet 16 for discharging top gas out of the shaft furnace body 100. According to the utility model discloses an embodiment can be provided with reduction chamber heating element 17 on reduction chamber 11's the outer wall for provide the heat to reduction chamber 11, according to the utility model discloses a specific embodiment, reduction chamber heating element can include a plurality of jacket formula electric heating furnaces, specifically, reduction chamber heating element can be the electric heating furnace of a three-section fever that reduces, and this electric heating furnace adopts the silicon molybdenum stick to be heating element, and the highest temperature all can reach 1200 degrees centigrade to application PID accurate accuse temperature, thereby realize the distribution of temperature gradient in the accurate simulation shaft furnace actual production process shaft furnace.
According to an embodiment of the present invention, the outer walls of the upper cooling chamber 10 and the lower cooling chamber 12 may be provided with cooling jackets 18. According to the embodiment of the present invention, the cooling medium in the cooling jacket 18 is not particularly limited, and according to the embodiment of the present invention, the cooling medium in the cooling jacket 18 may be circulating water. Specifically, adopt indirect circulating water cooling, the cooling water gets into the intermediate layer of cooling chamber 10 and lower cooling chamber 12, adopts the accurate flow of control cooling water of measuring pump to can strengthen the cooling effect, play the guard action simultaneously to the flange seal of batcher and row material machine. The inventor finds that the plate-inserting type feeding machine and the plate-inserting type discharging machine can be ensured not to be damaged due to overhigh temperature by arranging the cooling jackets on the outer walls of the upper cooling chamber and the lower cooling chamber.
According to the utility model discloses gas base shaft furnace through set up reduction chamber heating element at reduction chamber outer wall can system, simulate each technological parameter in the shaft furnace production process comprehensively, especially can effectively simulate temperature gradient distribution in the shaft furnace production process.
Referring to fig. 2, a gas based shaft furnace according to an embodiment of the present invention further comprises:
200 of a raw material storage tank: according to the embodiment of the present invention, the raw material storage tank 200 has a pellet inlet 21, a pellet outlet 22, a first nitrogen inlet 23 and a first nitrogen outlet 24, and according to the embodiment of the present invention, the pellet outlet 22 is connected to the material inlet 13.
Reduced product storage tank 300: according to the embodiment of the present invention, the reduction product storage tank 300 has a product feed port 31, a product discharge port 32, a second nitrogen inlet 33 and a second nitrogen outlet 34, and according to the embodiment of the present invention, the product feed port 31 is connected to the reduction product outlet 14. According to the utility model discloses an embodiment, the material of raw materials storage tank 200 and reduction products storage tank 300 is not restricted in particular, according to the utility model discloses a specific embodiment, raw materials storage tank 200 and reduction products storage tank 300 all can be made by stainless steel. Specifically, the reduction storage tank 200 is used as an intermediate storage device for pellet raw materials, and the reduction product storage tank 300 is used as an intermediate storage device for reduction products, so that 30-70 kg of materials can be loaded, and the device can be ensured to simulate the pressure conditions borne by pellets in the reduction process in the gas-based shaft furnace.
The air distribution device 400: according to the utility model discloses an embodiment can have nitrogen gas storage tank and reducing gas storage tank among the distribution device 400.
Reducing gas line 500: according to the embodiment of the present invention, the reducing gas pipeline 500 is connected to the gas distribution device 400 and the reducing gas inlet 15 respectively. According to the embodiment of the utility model, reducing gas pipeline 500 can wrap up heating band and insulation material outward to can guarantee that the reducing gas temperature does not descend in the reducing gas pipeline.
Reducing gas heating assembly 600: according to the embodiment of the present invention, the reducing gas heating assembly 600 is disposed outside the reducing gas pipeline 500, and is used for preheating the reducing gas before introducing the reducing gas into the shaft furnace body.
Condenser 700: according to the utility model discloses an embodiment, condenser 700 links to each other with roof gas outlet 16 for the roof gas to the reduction reaction in-process production carries out cooling treatment, so that carries out purification treatment to the roof gas, thereby reaches exhaust emission standard.
Plate inserting type feeder 800: according to the embodiment of the utility model, the slat feeder 800 links to each other with pellet export 22 and material entry 13 respectively for in adding the pellet ration shaft furnace body 100. Specifically, the opening and closing cycle frequency of the inserting plate can be controlled by the electro-hydraulic push rod, the feeding and discharging speed can be controlled, and the device is easy to control and is not easy to crush pellets.
Flashboard type discharger 900: according to an embodiment of the present invention, the plate discharger 900 is connected to the reduction product outlet 14 and the product feed inlet 31, respectively, for discharging the reduction product quantitatively out of the shaft furnace body 100. Similarly, the inserting plate type discharging machine 900 can also control the opening and closing cycle frequency of the inserting plate by the electro-hydraulic push rod to control the feeding and discharging speed, and the device is easy to control and is not easy to crush pellets.
Nitrogen substitution device 1000: according to the utility model discloses an embodiment, nitrogen gas replacement device 1000 links to each other with first nitrogen gas entry 23 and second nitrogen gas entry 33 respectively for let in nitrogen gas in raw materials storage tank and the reduction product storage tank after reduction reaction finishes, so that it is clean with the replacement of the reducing gas in raw materials storage tank and the reduction product storage tank, thereby can ensure device operating personnel's security.
According to the embodiment of the present invention, ball valves 1100 are respectively disposed in the pellet inlet 21, the pellet outlet 22, the product feed inlet 31 and the product discharge outlet 32. The inventors have found that CO and H are present in large amounts in the body of the shaft furnace due to the presence of the reducing gases CO and H2All the gas is dangerous gas, if no sealing system exists, a large amount of gas in the pipe is easy to leak, so that the gas tightness of the device can be obviously enhanced by arranging the ball valve, conditions are provided for multi-path continuous tests, and the safety of the device is ensured.
As mentioned above, a gas based shaft furnace according to embodiments of the present invention may have at least one of the following advantages selected from:
according to the embodiment of the utility model, the outer wall of the reduction chamber of the shaft furnace body of the gas-based shaft furnace adopts the three-section heating furnace, and the temperature of the three-section heating furnace can be respectively controlled, so that the aim of accurately simulating the temperature gradient distribution in the shaft furnace in the actual production process of the shaft furnace is realized;
according to the embodiment of the utility model, the coil pipe device is arranged in the reducing gas heating assembly of the gas-based shaft furnace, and the air inlet pipeline is wrapped with the heat insulation material and the heating belt, so that the gas preheating effect can be enhanced, the experimental requirement can be met before the reducing gas enters the shaft furnace, and the condition that the reducing gas enters the shaft furnace in the simulation industrial production is realized;
the furnace burden used by the whole test device of the gas-based shaft furnace according to the embodiment of the utility model is 30-70 kg, and the pressure condition born by the pellets in the gas-based shaft furnace in the reduction process can be simulated;
the gas-based shaft furnace provided by the embodiment of the utility model adopts the plate-inserting type feeding machine and the plate-inserting type discharging machine, which is not only easy to control, but also not easy to crush the pellets;
the gas-based shaft furnace provided by the embodiment of the utility model is provided with the cooling system, so that the cooling effect of the pellets can be enhanced, and the safe operation of the equipment can be ensured;
according to the utility model discloses gas base shaft furnace device ball valve can guarantee that reducing gas does not reveal to the security of testing device has been improved, and long-time continuous operation can be realized.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
Examples
Before the test, the ball valves at the gas distribution device, the pellet inlet, the pellet outlet, the product feed inlet and the product discharge outlet are ensured to be in a closed state. Starting a test, namely opening a ball valve at a pellet inlet, loading iron ore pellets into a raw material storage tank, closing the ball valve at a pellet outlet after the raw material storage tank is full, opening the ball valve at the pellet outlet, opening a plate-inserting type feeder to enable the pellets to enter a shaft furnace body, then opening a nitrogen storage tank on a gas distribution device, introducing nitrogen into the shaft furnace body at a speed of 10-50L/min, opening a reducing gas heating assembly and a reducing chamber heating assembly, simultaneously opening circulating water cooling systems of an upper cooling chamber and a lower cooling chamber, opening the reducing gas storage tank of the gas distribution device after the temperature of gas entering the furnace and the temperature of the pellets in the reducing chamber reach 700-1000 ℃ and are stable, switching the gas into reducing gas, and introducing the reducing gas into a reducing chamber at a speed of 10-50L/min; then opening a ball valve at a product feed port, simultaneously opening a flashboard type discharging machine, stopping the flashboard type feeding machine and the flashboard type discharging machine after the pellets in the reduction product storage tank are full, closing the ball valve at a pellet outlet and the ball valve at the ball product feed port, then opening a nitrogen replacement system, and completely replacing the reduction gas in the raw material storage tank and the reduction product storage tank with nitrogen; and then opening a ball valve at a product discharge port, discharging the reduced pellets, simultaneously opening a ball valve at a pellet inlet, loading iron ore pellets, filling the raw material storage tank, closing the ball valve at the pellet inlet and the ball valve at the product discharge port after the pellets in the reduced product storage tank are completely discharged, then opening a nitrogen replacement system, completely replacing air in the raw material storage tank and the reduced product storage tank with nitrogen, then opening the ball valve at the pellet inlet and the ball valve at the product feed port, and opening a plug-in plate feeder and a plug-in plate discharger to continue the test process. During the test, a sample was taken from the top gas discharged from the condenser, and the composition thereof was analyzed.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.
Claims (9)
1. A gas-based shaft furnace, comprising:
the shaft furnace comprises a shaft furnace body, wherein an upper cooling chamber, a reduction chamber and a lower cooling chamber are sequentially defined in the shaft furnace body from top to bottom;
a material inlet disposed at a top of the upper cooling chamber;
a reduced product outlet disposed at a bottom of the lower cooling chamber;
a reducing gas inlet provided on an outer wall of the reducing chamber;
a top gas outlet disposed at the top of the upper cooling chamber; and
the reduction chamber heating assembly is arranged on the outer wall of the reduction chamber.
2. The gas-based shaft furnace of claim 1, further comprising:
the device comprises a raw material storage tank, a pellet inlet, a pellet outlet, a first nitrogen inlet and a first nitrogen outlet, wherein the raw material storage tank is provided with the pellet inlet, the pellet outlet, the first nitrogen inlet and the first nitrogen outlet; and
a reduction product storage tank, wherein the reduction product storage tank is provided with a product feeding hole, a product discharging hole, a second nitrogen inlet and a second nitrogen outlet,
wherein,
the pellet outlet is connected with the material inlet,
the product feed inlet is connected with the reduction product outlet.
3. The gas-based shaft furnace of claim 1, further comprising:
a gas distribution device;
the reducing gas pipeline is respectively connected with the gas distribution device and the reducing gas inlet;
a reducing gas heating assembly disposed outside the reducing gas pipe.
4. The gas-based shaft furnace of claim 1, further comprising a condenser connected to the top gas outlet.
5. The gas-based shaft furnace of claim 1, wherein said reduction chamber heating assembly comprises a plurality of jacketed electric furnaces.
6. The gas-based shaft furnace according to claim 1, wherein the outer walls of said upper cooling chamber and said lower cooling chamber are provided with cooling jackets.
7. The gas-based shaft furnace of claim 2, further comprising:
the inserting plate type feeding machine is respectively connected with the pellet outlet and the material inlet; and
and the inserting plate type discharging machine is respectively connected with the reduction product outlet and the product feeding hole.
8. The gas-based shaft furnace of claim 2, wherein ball valves are arranged in the pellet inlet, the pellet outlet, the product feed inlet and the product discharge outlet, respectively.
9. The gas-based shaft furnace of claim 2, further comprising:
and the nitrogen replacement device is respectively connected with the first nitrogen inlet and the second nitrogen inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282771.XU CN203904382U (en) | 2014-05-29 | 2014-05-29 | Gas-based shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420282771.XU CN203904382U (en) | 2014-05-29 | 2014-05-29 | Gas-based shaft furnace |
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| Publication Number | Publication Date |
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| CN203904382U true CN203904382U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420282771.XU Expired - Fee Related CN203904382U (en) | 2014-05-29 | 2014-05-29 | Gas-based shaft furnace |
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| CN (1) | CN203904382U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211422A (en) * | 2018-10-24 | 2019-01-15 | 中国计量大学 | Application method based on coal gasifier outside wall temperature monitoring imitative experimental appliance |
| CN109405999A (en) * | 2018-10-24 | 2019-03-01 | 中国计量大学 | A kind of imitative experimental appliance of pair of coal gasifier outside wall temperature variation monitoring |
| CN114134277A (en) * | 2021-12-22 | 2022-03-04 | 张伟 | Electric auxiliary heating direct reduction shaft furnace |
-
2014
- 2014-05-29 CN CN201420282771.XU patent/CN203904382U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211422A (en) * | 2018-10-24 | 2019-01-15 | 中国计量大学 | Application method based on coal gasifier outside wall temperature monitoring imitative experimental appliance |
| CN109405999A (en) * | 2018-10-24 | 2019-03-01 | 中国计量大学 | A kind of imitative experimental appliance of pair of coal gasifier outside wall temperature variation monitoring |
| CN109405999B (en) * | 2018-10-24 | 2020-11-10 | 中国计量大学 | A simulation experiment device for monitoring the temperature change of the outer wall of coal gasifier |
| CN114134277A (en) * | 2021-12-22 | 2022-03-04 | 张伟 | Electric auxiliary heating direct reduction shaft furnace |
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