WO2010131658A1 - 溶融スラグ熱回収装置 - Google Patents
溶融スラグ熱回収装置 Download PDFInfo
- Publication number
- WO2010131658A1 WO2010131658A1 PCT/JP2010/057972 JP2010057972W WO2010131658A1 WO 2010131658 A1 WO2010131658 A1 WO 2010131658A1 JP 2010057972 W JP2010057972 W JP 2010057972W WO 2010131658 A1 WO2010131658 A1 WO 2010131658A1
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- WO
- WIPO (PCT)
- Prior art keywords
- slag
- solidified
- fluid medium
- molten slag
- fluidized bed
- Prior art date
Links
- 239000002893 slag Substances 0.000 title claims abstract description 152
- 239000012530 fluid Substances 0.000 claims abstract description 66
- 238000011084 recovery Methods 0.000 claims abstract description 39
- 239000002245 particle Substances 0.000 claims description 20
- 238000010298 pulverizing process Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 43
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- 239000006004 Quartz sand Substances 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000007664 blowing Methods 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 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
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- VOJREVRIHQPQTJ-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO.CCCCCCCCCCCCCCCCO VOJREVRIHQPQTJ-UHFFFAOYSA-N 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/04—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot slag, hot residues, or heated blocks, e.g. iron blocks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B15/00—Fluidised-bed furnaces; Other furnaces using or treating finely-divided materials in dispersion
- F27B15/02—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/076—Fluidised bed for cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates to a molten slag heat recovery device that recovers heat from blast furnace molten slag.
- JP 2007-284761 A Japanese Patent Laid-Open No. 5-311214 JP-A-11-181508 Japanese Patent Laid-Open No. 5-296673
- an object of the present invention is to provide a molten slag heat recovery device that solves the above problems, simplifies the structure, and has high heat recovery efficiency.
- the present invention provides a fluidized bed obtained by fluidizing a fluidized medium obtained by pulverizing solidified slag, a molten slag supply means for supplying molten slag to the fluidized bed, and recovering heat from the fluidized bed.
- a heat exchanger and a solidified slag recovery device that recovers the solidified slag solidified by the molten slag in the fluidized bed.
- the molten slag is dropped onto the fluidized bed.
- the present invention includes a crushing device that crushes the solidified slag collected by the solidified slag collecting device. Furthermore, it comprises a circulation device that pulverizes using the pulverizer and returns to the fluidized bed.
- the present invention includes a fluid medium extraction device that extracts a part of the fluid medium.
- the molten slag supplied to the fluidized bed is solidified, and the heat generated at that time is transmitted to the heat transfer tube through the fluidized medium, and the heat transfer coefficient between the heat transfer tube and the fluidized medium is between the gas and the heat transfer tube. Since it is about 10 times the heat transfer coefficient, the heat transfer area for the same amount of heat recovery can be reduced, the heat recovery efficiency is excellent, and the apparatus can be downsized.
- the dropped molten slag is supplied into the fluidized bed as a lump of a predetermined size, and then a part of the fluidized medium is taken in to form solidified slag.
- the fluid medium is returned to the fluidized bed via the circulation device, so that the amount of the fluid medium can be maintained substantially constant.
- the fluidized medium is present in the fluidized bed at a high temperature for a long time, the fluidized medium is subjected to a heat treatment, and a part of the fluidized medium is extracted via a fluidized medium extracting device to produce an aggregate or other product. Available.
- Example 1 of this invention It is explanatory drawing which shows Example 1 of this invention. It is explanatory drawing which shows the apparatus of an experiment example same as the above. It is a graph which shows the actual measurement temperature and theoretical value temperature in the fluidized bed of an experiment example same as the above. It is a graph which shows the relationship between the supply speed of the simulation slag of an experiment example, and the uptake
- the molten slag heat recovery apparatus 1 includes an apparatus main body 2, a fluidized bed 3 is provided in the apparatus main body 2, and a slag reservoir 4 serving as a molten slag supply means is provided above the fluidized bed 3.
- a communication passage 5 communicating with the apparatus main body 2 is provided at a lower portion of the slag reservoir 4, and a slag dropping nozzle 6 connected to the lower portion of the slag reservoir 4 is provided in the communication passage 5.
- the slag dropping nozzle 6 is provided with a blowing port 6A for blowing high-speed air or nitrogen.
- the apparatus main body 2 is provided with a bottom dispersion plate 8 in which a heat transfer tube 7 is disposed in the upper part of the fluidized bed 3 and a side plate 2A of the apparatus main body 2 is formed obliquely below the heat transfer pipe 7.
- the dispersion plate 8 is provided with a gas nozzle 9 to supply a fluidized gas into the fluidized bed 3.
- an aeration nozzle 10 for supplying a flowing gas into the fluidized bed 3 is provided in a portion of the side plate 2B continuous to the lower part of the bottom dispersion plate 8, and the gas nozzle 9 and the aeration nozzle 10 supply the fluidizing gas. Means.
- the fluidized bed 3 is formed such that the section surrounded by the side plate 2B below the bottom dispersion plate 8 is smaller in cross section than the top.
- the gas linear velocity in the portion surrounded by the side plate 2B is operated so as to be higher than the gas linear velocity on the bottom dispersion plate 8.
- a heat exchanger 11 is provided on the side plate 2B, and a cooling water supply means 12 is connected to the heat exchanger 11, and the solidified slag and the fluid medium flowing downward inside the portion surrounded by the side plate 2B are cooled. . At this time, the cooling water heated by the solidified slag and the fluid medium in the heat exchanger 11 is recovered to the outside from the recovery path 13 as steam or hot water.
- an exhaust gas flue 14 is provided in the upper part of the apparatus main body 2, the exhaust gas flue 14 is located above the fluidized bed 3, and a heat transfer tube 15 is provided in the exhaust gas flue 14.
- the heat transfer tube 7 which is a heat exchanger contacts the fluid medium 32 in the fluidized bed 3, and the heat transfer tube 15 contacts the exhaust gas in the exhaust gas flue 14 to recover heat from the fluid medium and the exhaust gas, respectively.
- Cooling water or steam which is a heat medium, is sent to the heat transfer tubes 7 and 15 and is recovered outside as superheated steam, saturated steam or warm water.
- a solidified slag extracting device 16 such as a conveyor is provided below the fluidized bed 3 and at the bottom of the apparatus main body 2.
- the solidified slag extracting device 16 sends the solidified slag containing the fluidized medium from the discharge port 17 to the outside.
- Discharge A crusher 18 as a crushing means for crushing the solidified slag discharged from the discharge port 17 is provided, and a part of the pulverized slag pulverized by the crusher 18 is fed from the fluid medium supply port 20 to the apparatus main body 2 by the circulation device 19. And the crushed slag particles become a fluid medium.
- the fluid medium supply port 20 is located above the fluid medium layer upper surface of the fluidized bed 3. The remaining crushed slag other than the returned one is the product 35.
- a fluidized medium extracting device 21 for extracting a part of the fluidized medium 32 is connected, and the extracted fluidized medium becomes a product 36.
- a molten slag droplet 31 is dropped into the fluidized bed 3 from a slag reservoir 4 installed at the upper part of the fluidized bed 3.
- the molten slag droplet 31 is continuously dropped and supplied at a predetermined interval.
- the fluidized bed 3 is obtained by fluidizing a fluid medium 32 composed of pulverized slag particles having a particle diameter of 0.1 mm to 3 mm using air or nitrogen at a gas velocity in the range of 2 to 20 times the fluidization start velocity. It is.
- the gas used for fluidizing the fluid medium 32 is supplied from the gas nozzle 9 and the aeration nozzle 10.
- the temperature is maintained below the slag melting point and desirably in a temperature range of 700 to 1000 ° C.
- the dropped slag forms a solidified product 33 while taking in the surrounding fluid medium 32 in part.
- the solidified slag 34 is completely cooled and solidified by the heat from the surrounding fluid medium 32.
- the heat transmitted to the fluidized medium 32 is transmitted to the cooling water or steam supplied to the heat transfer tubes 7 and 15 and the heat exchanger 11 set in the fluidized bed 3, and is recovered in the form of superheated steam, saturated steam or warm water. .
- the solidified slag 34 sinks in the fluidized bed 3 and is cooled by the gas blown from the heat exchanger 11 and the aeration nozzle 10 installed on the side plate 2B, and then the solidified slag is extracted from the bottom.
- the device 16 is drawn out of the fluidized bed 3 from the outlet 17.
- the fluid medium 32 is taken into the solidified slag 34, the fluid medium 32 decreases as the solidified slag 34 is extracted, but the solidified slag 34 is pulverized by the pulverizer 18 and flows through the circulation device 19. By recycling into the layer 3, the amount of the fluid medium 32 is maintained substantially constant.
- the part not used in the pulverized slag particles from the pulverizer 18 becomes the product 35. Further, since the fluid medium 32 in the apparatus main body 2 exists in the fluidized bed 3 at a high temperature for a long time, the fluid medium 32 has been subjected to heat treatment, and a part of the fluid medium 32 is extracted via the fluid medium extractor 21. Available as product 36. When the slag reservoir 4 is dropped onto the fluidized bed 3, the droplet size is adjusted by blowing high-speed air or nitrogen from the blowing port 6A into the nozzle 6 in order to adjust the particle size of the droplet. Can do.
- heat can be transferred via the fluidized medium 32, so that the heat of the molten slag can be transferred to the heat transfer tube 7 even if the molten slag does not adhere directly to the heat transfer tube 7. Since the heat transfer coefficient between the heat transfer tube 7 and the fluidized bed 3 at this time is about 10 times the heat transfer coefficient between the gas (gas) and the heat transfer tube 7, the heat transfer area for the same heat recovery amount is 1 An order of magnitude can be reduced, so that the device can be miniaturized. Further, it is utilized that the solidified slag 34 can be selectively and continuously extracted by settling in the fluidized bed 3.
- molten slag is introduced and solidified, and heat generated at that time is transmitted to the heat transfer tube 7 through the fluidized medium 32 which is a fluidized particle.
- steam having a temperature as high as possible (approximately 600 ° C. or higher) can be recovered.
- stable continuous operation can be performed.
- the fluidized bed 3 can be maintained at a high temperature of 800 ° C. to 1000 ° C., and the heat treatment of the solidified slag can be performed simultaneously.
- the fluidized bed 3 composed of the fluidized medium 32 composed of particles obtained by pulverizing the solidified slag 34 is fluidized with air, and molten slag is dropped therein, and the molten slag solidifies while taking in surrounding particles. At that time, heat is released, but the heat is transferred to the conductive tube 7 in the layer through surrounding fluidized particles, and heat recovery is performed.
- the slag coarse particles settle on the bottom, are cooled and extracted and then partially pulverized to form a fluidized medium 32 constituting the fluidized bed 3. The remainder is effectively used as a product 35 such as an aggregate.
- Experimental Example 1 Experimental Method Generated when simulated slag (wax 101) is dropped into the fluidized bed 102 and the molten wax 101 solidifies in order to simulate the heat recovery method from the molten slag using the fluidized bed proposed in the present invention. It was examined whether the heat to be transferred to the surrounding particles as theoretically, and how much the surrounding particles take in when the simulated slag (wax 101) solidifies. An outline of the experimental apparatus is shown in FIG.
- the apparatus main body used in this experimental example was made of acrylic, and a fluidized bed 102 having an inner diameter of 54 mm and a height of 300 mm was used.
- Polystyrene was affixed to the bottom as a heat insulating material, and the pipe had a double pipe structure for heat insulation on the wall.
- As the fluid medium 103 300 g of quartz sand (QS) having a particle diameter of 0.15 mm was filled. Particles were fluidized by supplying 13.55 l / min of nitrogen, which is five times the minimum fluidization speed, as fluidizing gas 107.
- molten wax (Wax) 101 simulating molten slag was used as molten wax (Wax) 101 simulating molten slag.
- the melting point is 49 ° C., and the density is 800 kg / m 3.
- 80 ° C. molten wax 101 was dropped into the fluidized bed 102 drop by drop every 1.5 seconds.
- the droplet diameter was about 4-5 mm.
- the wax dropping weight rate was calibrated in advance under the same conditions.
- FIG 3 shows a measured value of the temperature in the fluidized bed 102 after starting the supply of simulated slag (wax 101) in comparison with a theoretical value.
- the theoretical value is based on the fact that the heat generated when the simulated slag (wax 101) solidifies is completely transferred to the quartz sand particles and the fluidized gas, and heat is transferred from the device containing the particles to the outside due to heat transfer. There is.
- a stable flow was maintained until 700 seconds after the supply of the simulated slag (wax 101) was started, and the temperature rise was almost the same as the theoretical value. This indicates that the fluidized bed heat recovery of the present invention is possible if an appropriate flow can be maintained.
- the solidified substance 106 accumulated in the apparatus at a time exceeding 700 seconds to cause a flow failure, and the actually measured temperature rise deviated from the theory.
- the flow failure due to the accumulation of the solidified material can be avoided by extracting the accumulated solidified slag using an appropriate means such as the solidified slag extracting device 16 shown in the embodiment.
- FIG. 4 shows that the solidified substance 106 accumulated in the apparatus is taken up to 300 seconds after the supply of the simulated slag (wax 101) is taken out, the wax 101 and the quartz sand of the fluid medium 102 are separated and weighed separately, and the result is simulated. From the density of slag (wax 101) and quartz sand, the volume of quartz sand taken into the simulated slag (wax 101) is obtained by calculation. Regardless of the dropping speed of the simulated slag (wax 101), the volume ratio of sand: simulated slag (wax 101) was taken in at a ratio of 0.4 to 0.5: 1. From this data, the amount of pulverized / recycled solidified product can be estimated.
- the heat transfer tube 7 as a heat exchanger for recovering the solidified slag and the solidified slag extraction device as the solidified slag recovery device for recovering the solidified slag 34 solidified by the molten slag in the fluidized bed 3 are supplied to the fluidized bed 3.
- the molten slag is solidified and the heat generated at that time is transferred to the heat transfer tube 7 through the fluid medium 32.
- the heat transfer coefficient between the heat transfer tube 7 and the fluid medium 32 is about 10 times the heat transfer coefficient between the gas and the heat transfer tube. Therefore, the heat transfer area for the same heat recovery amount can be reduced, the heat recovery efficiency is excellent, and the apparatus can be downsized.
- the dropped molten slag droplet 31 is supplied into the fluidized bed 3 as a lump of a predetermined size. A part of the medium 32 is taken in to form a solidified slag 34.
- a pulverizer 18 serving as a pulverizing means for pulverizing the solidified slag recovered by the solidified slag extracting device 16 serving as a solidified slag collecting device, and a circulation for returning the pulverized solidified slag particles to the fluidized bed 3. Since the apparatus 19 is provided, the amount of the fluid medium 32 can be maintained substantially constant by returning the fluid catalyst 32 into the fluidized bed 3 via the circulation device 19.
- the fluid medium extraction device 21 for extracting a part of the fluid medium 32 since the fluid medium extraction device 21 for extracting a part of the fluid medium 32 is provided, a part of the fluid medium 32 exists in the fluidized bed 3 at a high temperature for a long time. Therefore, it is heat-treated, and a part of the fluid medium 32 is extracted via the fluid medium extracting device 21 and can be used as a product 36 such as an aggregate.
- the fluid medium 32 is fluidized by supplying air or nitrogen gas, which is a fluidized gas, to the fluid medium 32 obtained by pulverizing the solidified slag.
- the fluidizing gas is not limited to the examples, and various gases can be used.
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Abstract
Description
さらにまた、前記粉砕装置を用いて粉砕したのち前記流動層に返送する循環装置を備えるものである。
実験例
1.実験例の方法
本発明で提案する流動層を用いた溶融スラグからの熱回収方式を模擬するために、模擬スラグ(ワックス101)を流動層102に滴下し、溶融ワックス101が固化する際に発生する熱が周囲粒子に理論どおりに移動するかどうか、また、模擬スラグ(ワックス101)が固化する際にどれだけ周囲粒子を取り込むかを検討した。実験装置概略を図2に示す。
2.実験例の結果
図3に模擬スラグ(ワックス101)供給開始後の流動層102内の温度の実測値を理論値と比較して示す。理論値は、模擬スラグ(ワックス101)が固化する際に発する熱が石英砂粒子ならびに流動化ガスに完全に移動するとともに、粒子を入れた装置から外部へ伝熱で熱損失することを考慮に入れてある。温度を実測した結果、模擬スラグ(ワックス101)の供給開始後700秒までは安定した流動が維持されて、温度上昇は理論値とほぼ同じであった。これは、適切な流動が維持できれば、本発明の流動層式熱回収が可能であることを示す。一方、700秒を越えたところで装置内に固化物106が蓄積して流動不良を起こし、実測された温度上昇が理論からずれるようになった。しかし、固化物蓄積による流動不良は、蓄積した固化スラグを、実施例で示した固化スラグ抜き出し装置16のような適切な手段を用いて抜き出せば回避できると考えられる。
2 流動層本体
2A 流動層本体側板
2B 流動層底部粒子冷却抜き出し部側板
3 流動層
4 スラグ溜め(溶融スラグ供給手段)
5 連通路
6 スラグ滴下ノズル
6A スラグ滴下ノズルガス吹き込み用ノズル
7 流動層内伝熱管(熱交換器)
8 底部分散板
9 ガスノズル(流動化ガス供給手段)
10 エアレーションノズル(流動化ガス供給手段)
11 抜き出し粒子冷却用熱交換器
12 冷却水供給手段
13 水蒸気あるいは温水回収路
14 排ガス煙道
15 煙道内伝熱管(熱交換器)
16 固化スラグ抜き出し装置(固化スラグ回収装置)
17 固化スラグ排出口
18 粉砕機(粉砕手段)
19 循環装置
20 流動媒体供給口
21 流動媒体抜き出し装置
31 溶融スラグ滴
32 流動媒体
33 流動媒体を取り込みつつ固化する半固化スラグ(固化物)
34 固化スラグ
35 製品(固化スラグ粉砕物)
36 製品(熱処理後流動媒体)
101 模擬スラグ(ワックス)
102 流動層
103 流動媒体
104 固化模擬スラグ(固化ワックス)
105 付着流動媒体
106 固化物(付着流動媒体を取り込んだ固化模擬スラグ)
107 流動化ガス
Claims (10)
- 固化スラグを粉砕した流動媒体を流動化した流動層と、この流動層に溶融スラグを供給する溶融スラグ供給手段と、前記流動層から熱を回収する熱交換器と、前記流動層内で前記溶融スラグが固化した固化スラグを回収する固化スラグ回収装置とを備えることを特徴とする溶融スラグ熱回収装置。
- 前記溶融スラグを前記流動層に滴下することを特徴とする請求項1記載の溶融スラグ熱回収装置。
- 前記固化スラグ回収装置により回収した前記固化スラグを粉砕する粉砕手段と、この粉砕した固化スラグ粒子を前記流動層に返送する循環装置とを備えることを特徴とする請求項1記載の溶融スラグ熱回収装置。
- 前記固化スラグ回収装置により回収した前記固化スラグを粉砕する粉砕手段と、この粉砕した固化スラグ粒子を前記流動層に返送する循環装置とを備えることを特徴とする請求項2記載の溶融スラグ熱回収装置。
- 前記流動媒体の一部を抜き取る流動媒体抜き出し装置を備えることを特徴とする請求項2記載の溶融スラグ熱回収装置。
- 前記流動媒体の一部を抜き取る流動媒体抜き出し装置を備えることを特徴とする請求項3記載の溶融スラグ熱回収装置。
- 前記流動媒体の一部を抜き取る流動媒体抜き出し装置を備えることを特徴とする請求項4記載の溶融スラグ熱回収装置。
- 前記固化スラグを粉砕した流動媒体に、流動化ガスを供給して前記流動媒体を流動化することを特徴とする請求項1記載の溶融スラグ熱回収装置。
- 前記固化スラグを粉砕した流動媒体に、流動化ガスを供給して前記流動媒体を流動化することを特徴とする請求項2記載の溶融スラグ熱回収装置。
- 前記固化スラグを粉砕した流動媒体に、流動化ガスを供給して前記流動媒体を流動化することを特徴とする請求項3記載の溶融スラグ熱回収装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP10774915.2A EP2431697A4 (en) | 2009-05-12 | 2010-05-11 | APPARATUS FOR RECOVERING HEAT FROM MOLTEN DAIRY |
JP2011513347A JP5357962B2 (ja) | 2009-05-12 | 2010-05-11 | 溶融スラグ熱回収装置 |
US13/320,080 US8764439B2 (en) | 2009-05-12 | 2010-05-11 | Device for recovering heat of molten slag |
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JP2009115888 | 2009-05-12 | ||
JP2009-115888 | 2009-05-12 |
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WO2010131658A1 true WO2010131658A1 (ja) | 2010-11-18 |
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PCT/JP2010/057972 WO2010131658A1 (ja) | 2009-05-12 | 2010-05-11 | 溶融スラグ熱回収装置 |
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US (1) | US8764439B2 (ja) |
EP (1) | EP2431697A4 (ja) |
JP (1) | JP5357962B2 (ja) |
WO (1) | WO2010131658A1 (ja) |
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ITMO20130353A1 (it) * | 2013-12-20 | 2015-06-21 | Gian Paolo Balderacchi | Impianto e metodo per il recupero di calore da forni di cottura |
CN105277004B (zh) * | 2015-11-25 | 2018-01-12 | 南京圣诺热管有限公司 | 高温熔融炉渣两步法余热回收装置及余热回收方法 |
CN107894170A (zh) * | 2017-11-08 | 2018-04-10 | 中科合肥煤气化技术有限公司 | 一种高温炉渣热量回收制冷装置 |
CN110186287B (zh) * | 2019-05-29 | 2021-02-23 | 山西八达镁业有限公司 | 一种高温渣余热利用方法和系统 |
CN111351340B (zh) * | 2020-03-13 | 2021-05-07 | 钢铁研究总院 | 一种高温液体冷却装置 |
CN113819776A (zh) * | 2021-08-11 | 2021-12-21 | 自然资源部天津海水淡化与综合利用研究所 | 一种旋流流化床 |
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- 2010-05-11 EP EP10774915.2A patent/EP2431697A4/en not_active Withdrawn
- 2010-05-11 JP JP2011513347A patent/JP5357962B2/ja not_active Expired - Fee Related
- 2010-05-11 US US13/320,080 patent/US8764439B2/en not_active Expired - Fee Related
- 2010-05-11 WO PCT/JP2010/057972 patent/WO2010131658A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
JPWO2010131658A1 (ja) | 2012-11-01 |
EP2431697A4 (en) | 2016-01-13 |
US8764439B2 (en) | 2014-07-01 |
EP2431697A1 (en) | 2012-03-21 |
US20120055658A1 (en) | 2012-03-08 |
JP5357962B2 (ja) | 2013-12-04 |
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