CN109737759B - Electric smelting magnesium melting lump waste heat recovery device with self-deoxidizing function - Google Patents
Electric smelting magnesium melting lump waste heat recovery device with self-deoxidizing function Download PDFInfo
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- CN109737759B CN109737759B CN201811469100.3A CN201811469100A CN109737759B CN 109737759 B CN109737759 B CN 109737759B CN 201811469100 A CN201811469100 A CN 201811469100A CN 109737759 B CN109737759 B CN 109737759B
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- waste heat
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- heat recovery
- recovery chamber
- steam drum
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- 239000002918 waste heat Substances 0.000 title claims abstract description 95
- 238000011084 recovery Methods 0.000 title claims abstract description 88
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000011777 magnesium Substances 0.000 title claims abstract description 52
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 52
- 238000003723 Smelting Methods 0.000 title claims abstract description 38
- 238000002844 melting Methods 0.000 title claims description 16
- 230000008018 melting Effects 0.000 title claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000001301 oxygen Substances 0.000 claims abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 7
- 230000000630 rising effect Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 27
- 239000012528 membrane Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000005338 heat storage Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 235000014380 magnesium carbonate Nutrition 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical group [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an electric smelting magnesium smelting lump waste heat recovery device with a self-deoxidizing function, which comprises a waste heat recovery chamber, a steam drum, a deoxidizing head, a track and a magnesium smelting lump bearing trolley; the waste heat recovery chamber consists of a water-cooled wall, the steam drum is arranged above the waste heat recovery chamber and is connected with the water-cooled wall through a rising pipe and a falling pipe, and the top of the steam drum is provided with an oxygen removing head; a track is arranged in the waste heat recovery chamber, and the magnesium fused lump carrying trolley can move along the track. The invention has simple structure, economy and high efficiency, and can effectively absorb and utilize the low-temperature waste heat of the unshelling fused magnesium.
Description
Technical Field
The invention relates to the technical field of electric smelting magnesium melting lump waste heat recovery, in particular to an electric smelting magnesium melting lump waste heat recovery device with a self-deoxidizing function.
Background
In the process of producing the electric smelting magnesium magnesite, magnesium smelting lump is formed after the magnesite is smelted. The production process requires that the magnesium fused lump can be naturally cooled only and can not be forcedly cooled so as not to influence the crystallization effect of the magnesia. The electric smelting magnesium lump is dehulled after being cooled to about 200 ℃, the surface temperature of the dehulled magnesium lump is about 400-500 ℃, the part of heat is much lower than the heat contained in the electric smelting magnesium lump (1200 ℃) just after smelting, and the heat absorption efficiency of a conventional waste heat recovery device is relatively lower due to the heat exchange temperature difference.
In the process of waste heat power generation, the boiler water supply is required to be deoxidized, an independent thermal deaerator is generally adopted, and the air source of the deaerator is from steam led out by a boiler or a steam turbine. However, this design consumes a good quality gas source and does not make efficient use of the low temperature waste heat of the unshelling fused magnesium. The independent deaerator has poor adaptability to unheated condensate water, the deaeration effect is poor, an additional low-pressure heater is often required to be added, and the system designed by the independent deaerator has higher investment and lower cost performance.
Therefore, there is a need for a waste heat recovery device that is more economical, has a higher heat utilization rate, can effectively absorb and utilize low-temperature waste heat of unshelling fused magnesium, has a simple structure, and can replace a low-pressure heater.
Disclosure of Invention
The invention provides an electric smelting magnesium melting lump waste heat recovery device with a self-deoxidizing function, which has a simple structure, is economical and efficient, and can effectively absorb and utilize low-temperature waste heat of unshelling electric smelting magnesium.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
An electric smelting magnesium melting lump waste heat recovery device with a self-deoxidizing function comprises a waste heat recovery chamber, a steam drum, a deoxidizing head, a rail and a magnesium melting lump bearing trolley; the waste heat recovery chamber consists of a water-cooled wall, the steam drum is arranged above the waste heat recovery chamber and is connected with the water-cooled wall through a rising pipe and a falling pipe, and the top of the steam drum is provided with an oxygen removing head; a track is arranged in the waste heat recovery chamber, and the magnesium fused lump carrying trolley can move along the track.
The water-cooled wall is a membrane water-cooled wall.
The top of the water-cooled wall is provided with an upper header, the bottom of the water-cooled wall is provided with a lower header, the lower header is connected with the steam drum through a down pipe, and the upper header is connected with the steam drum through a up pipe.
The steam drum is internally provided with a steam-water separation device, and the steam drum is provided with a safety valve, a pressure gauge, a water level gauge and an emergency water discharge pipe; the bottom of the steam drum is provided with a water outlet pipe; the upper part of the deoxidizing head is provided with a water inlet, and the top of the deoxidizing head is provided with an exhaust port.
The waste heat recovery chamber is an annular waste heat recovery chamber.
The annular waste heat recovery chamber consists of a top water-cooling wall, an inner annular water-cooling wall and an outer annular water-cooling wall which form a closed annular space, a waste heat recovery chamber inlet and a waste heat recovery chamber outlet are arranged on the side surface of the annular space, and the waste heat recovery chamber inlet and the waste heat recovery chamber outlet are adjacently arranged and are respectively sealed by an inlet door and an outlet door; the magnesium fused lump bearing trolley is a rotary trolley, the track is an annular track, and the rotary trolley is driven by the trolley driving device to do circular motion along the annular track.
The bottom end of the outer ring water-cooled wall is communicated with the outer ring of the lower header, and the bottom end of the inner ring water-cooled wall is communicated with the inner ring of the lower header; the top end of the outer ring water-cooling wall is communicated with the outer end of the top water-cooling wall through an upper header outer ring, and the top end of the inner ring water-cooling wall is communicated with the inner end of the top water-cooling wall through an upper header inner ring; the inner ring of the lower header is communicated with the steam drum through a central pipe, and the central pipe is communicated with the steam drum through an inner down pipe; the outer ring of the lower header is communicated with the steam drum through an outer downcomer; the inner ring of the upper header is connected with the heat storage container through a plurality of ascending pipes.
Compared with the prior art, the invention has the beneficial effects that:
1) Compared with the traditional electric smelting magnesium smelting lump waste heat recovery device, the waste heat recovery device has the advantages that the structure is more compact, the investment of pipelines and valves is reduced, and the civil engineering investment is reduced, so that the engineering investment is greatly reduced;
2) Compared with the traditional electric smelting magnesium smelting lump waste heat recovery device, the waste heat recovery device improves the total waste heat recovery efficiency and reduces unnecessary steam consumption;
3) The waste heat recovery device has small occupied area and high land utilization degree;
4) Compared with the existing waste heat recovery device in a natural heat dissipation mode, the waste heat recovery device can achieve the best waste heat recovery effect, and the total amount of recovered heat is the highest;
5) The waste heat recovery device has better deoxidization effect, and has more excellent heat exchange effect, longer boiling time in the deoxidizer and higher strength due to large heat transfer temperature difference.
Drawings
Fig. 1 is a schematic structural diagram of an electric smelting magnesium melting lump waste heat recovery device with a self-deoxidizing function.
Fig. 2 is A-A view of fig. 1.
In the figure: 1. annular waste heat recovery chamber 1-1, top water wall 1-2, inner annular water wall 1-3, outer annular water wall 1-4, waste heat recovery chamber inlet 1-5, waste heat recovery chamber outlet 2, rotary trolley 2-1, load table 2-2, wheelset 2-3, independent suspension 3, trolley driving device 4, annular track 5, steel structural support 6, steam drum 6-1, safety valve 6-2, external steam valve 6-3, pressure gauge 6-4, water level gauge 6-5, water outlet 7, deoxidizing head 7-1, water inlet 7-2, exhaust port 8, lower header inner ring 9, lower header outer ring 10, upper header inner ring 11, upper header outer ring 12, flexible sealing element 13, inner downcomer 15, center tube 16, unshelling fused magnesium melt lump
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1 and 2, the electric smelting magnesium melting lump waste heat recovery device with the self-deoxidizing function comprises a waste heat recovery chamber, a steam drum 6, a deoxidizing head 7, a rail and a magnesium melting lump bearing trolley; the waste heat recovery chamber consists of a water-cooled wall, the steam drum 6 is arranged above the waste heat recovery chamber and is connected with the water-cooled wall through a rising pipe and a falling pipe, and the top of the steam drum 6 is provided with an oxygen removal head 7; a track is arranged in the waste heat recovery chamber, and the magnesium fused lump carrying trolley can move along the track.
The water-cooled wall is a membrane water-cooled wall.
The top of the water-cooled wall is provided with an upper header, the bottom of the water-cooled wall is provided with a lower header, the lower header is connected with the steam drum 6 through a down pipe, and the upper header is connected with the steam drum through a up pipe.
A steam-water separation device is arranged in the steam drum 6, and a safety valve, a pressure gauge, a water level gauge and an emergency water discharge pipe are arranged on the steam drum 6; the bottom of the steam drum 6 is provided with a water outlet pipe; the upper part of the deoxidizing head 7 is provided with a water inlet, and the top is provided with an exhaust port.
The waste heat recovery chamber is an annular waste heat recovery chamber 1.
The annular waste heat recovery chamber 1 is a closed annular space formed by a top water-cooled wall 1-1, an inner annular water-cooled wall 1-2 and an outer annular water-cooled wall 1-3, a waste heat recovery chamber inlet 1-4 and a waste heat recovery chamber outlet 1-5 are arranged on the side surface of the annular space, and the waste heat recovery chamber inlet 1-4 and the waste heat recovery chamber outlet 1-5 are adjacently arranged and are respectively closed through an inlet door and an outlet door; the magnesium fused lump bearing trolley is a rotary trolley 2, the track is an annular track 4, and the rotary trolley 2 is driven by a trolley driving device 3 to do circular motion along the annular track 4.
The bottom ends of the outer annular water-cooled walls 1-3 are communicated through a lower header outer ring 9, and the bottom ends of the inner annular water-cooled walls 1-2 are communicated through a lower header inner ring 8; the top end of the outer ring water-cooling wall 1-3 is communicated with the outer end of the top water-cooling wall 1-1 through an upper header outer ring 11, and the top end of the inner ring water-cooling wall 1-2 is communicated with the inner end of the top water-cooling wall 1-1 through an upper header inner ring 10; the inner ring 8 of the lower header is communicated with the central tube 15, and the central tube 15 is communicated with the steam drum 6 through the inner downcomer 13; the outer ring 9 of the lower header is communicated with the steam drum 6 through an outer downcomer; the upper header inner ring 10 is connected to the heat storage container through a plurality of rising pipes.
The following examples are given by way of illustration of detailed embodiments and specific procedures based on the technical scheme of the present invention, but the scope of the present invention is not limited to the following examples. The methods used in the examples described below are conventional methods unless otherwise specified.
Examples
As shown in fig. 1, the present embodiment is exemplified by a waste heat recovery device having an annular waste heat recovery chamber as follows:
The electric smelting magnesium melting lump waste heat recovery device with the self-deoxidizing function comprises an annular waste heat recovery chamber 1, a steam drum 6, a deoxidizing head 7, a rotary trolley 2 and a trolley driving device 3; the annular waste heat recovery chamber 1 is a closed annular space formed by a top water-cooled wall 1-1, an inner annular water-cooled wall 1-2 and an outer annular water-cooled wall 1-3, a waste heat recovery chamber inlet 1-4 and a waste heat recovery chamber outlet 1-5 are arranged on the side surface of the annular space, and the waste heat recovery chamber inlet 1-4 and the waste heat recovery chamber outlet 1-5 are adjacently arranged and are respectively closed through an inlet door and an outlet door; a steam drum 6 is arranged above the annular waste heat recovery chamber 1, and the steam drum 6 is connected with each water cooling wall 1-1, 1-2 and 1-3 of the annular waste heat recovery chamber 1 through a rising pipe and a falling pipe; the rotary trolley 2 is arranged in the annular waste heat recovery chamber 1, is driven by the trolley driving device 3 to do circular motion along the annular track 4, and the rotary trolley 2 is used for bearing the unshelling fused magnesium fused lump 16.
The top water-cooling wall 1-1, the inner annular water-cooling wall 1-2 and the outer annular water-cooling wall 1-3 are membrane water-cooling walls; the outer sides of the water cooling walls are respectively provided with a heat insulation layer and a protective layer; the top of the round space surrounded by the inner ring water cooling wall 1-2 is provided with a waterproof board.
The outer side of the annular waste heat recovery chamber 1 is provided with a steel structure bracket 5, the annular waste heat recovery chamber 1 is hung on the steel structure bracket 5, and the bottoms of the lower header inner ring 8 and the lower header outer ring 9 are in sealing connection with the ground through a flexible sealing piece 12; the steam drum 6 is arranged on the steel structure bracket 5, and the top of the steam drum 6 is provided with an oxygen removing head 7.
The rotary trolley 2 comprises a bearing table top 2-1, a wheel set 2-2 and an independent suspension 2-3; the bearing table top 2-1 is formed by connecting a plurality of sections of table tops, one or more groups of wheel sets 2-2 are arranged below each section of table top, and each section of table top is connected with the corresponding wheel set 2-2 through an independent suspension 2-3; the wheel set 2-2 comprises an inner ring wheel set and an outer ring wheel set; the trolley driving device 3 is arranged outside the annular waste heat recovery chamber 1 and consists of a motor, a speed reducer and a transmission device.
The rotary trolley 2 is made of heat-resistant steel, and the outer surface of the rotary trolley 2 is provided with a low-emissivity material coating or a heat radiation reflecting layer.
The waste heat recovery chamber inlet is provided with an inlet channel along the tangential direction of the annular space, the waste heat recovery chamber outlet is provided with an outlet channel along the tangential direction of the annular space, the inlet channel and the outlet channel are both constructed by refractory materials, and the inner side of the channel is respectively provided with a low-emissivity material coating or a heat radiation reflecting layer.
The low emissivity material coating is a chromium plating layer, and the thermal radiation reflecting layer is a tin foil reflecting layer.
The inlet door and the outlet door are both quick-opening and closing type rolling doors.
The working principle of the electric smelting magnesium smelting lump waste heat recovery device with the self-deoxidizing function is as follows:
Cold water entering each water cooling wall 1-1, 102 and 1-3 of the waste heat recovery device firstly enters the deoxidizing head 7 from the water inlet 7-1, enters the steam drum 6 after passing through the water spraying head in the deoxidizing head 7, carries out steam-water separation on water steam circularly exchanged in the water cooling walls 1-1, 1-2, 1-3 and the steam drum 6 through the steam-water separator in the steam drum 6, and then carries out reverse contact heat exchange with cold water which is not deoxidized in the deoxidizing head 7, heats the cold water, releases oxygen contained in the cold water, and is discharged through the air outlet 7-2 arranged above the deoxidizing head 7. The water in the steam drum 6 is in a boiling state, and the non-condensed gas released by the water is discharged to the atmosphere through the exhaust port 7-2 at the top of the oxygen removal head 7.
The unshelling electric smelting magnesium smelting lump is loaded by a magnesium smelting lump conveying trolley, enters the annular waste heat recovery chamber 1 through the waste heat recovery chamber inlets 1-4, pushes the unshelling electric smelting magnesium smelting lump 16 onto the rotary trolley 2 through a pushing device carried on the magnesium smelting lump conveying trolley, and immediately closes the inlet door after the discharged magnesium smelting lump conveying trolley exits the annular waste heat recovery chamber 1;
Starting a trolley driving device 3, and moving the unshelling fused magnesium fused lump 16 along the annular track 4 along with the rotary trolley 2; the water in the steam drum 6 enters the inner ring 8 of the lower header through the inner downcomer 13, and enters the outer ring 9 of the lower header through the outer downcomer 14, and then enters each water-cooled wall forming the annular waste heat recovery chamber 1; the unshelling fused magnesium fused lump 16 performs radiation heat transfer with each water-cooled wall 1-1, 1-2 and 1-3 in the moving process, and the relatively uniform heat exchange of each water-cooled wall is ensured by adjusting the moving speed of the rotary trolley 2.
The heat of the unshelling fused magnesium fused lump 16 absorbed by the annular waste heat recovery chamber 1 is mainly stored in the steam drum 6, and the steam drum 6 stores and supplies energy; the cooled unshelling electric smelting magnesium smelting lump 16 is unloaded from the bearing table surface of the rotary trolley 2 to the magnesium smelting lump conveying trolley through the unloading device carried on the magnesium smelting lump conveying trolley for outward transportation.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The electric smelting magnesium melting lump waste heat recovery device with the self-deoxidizing function is characterized by comprising a waste heat recovery chamber, a steam drum, a deoxidizing head, a rail and a magnesium melting lump bearing trolley; the waste heat recovery chamber consists of a water-cooled wall, the steam drum is arranged above the waste heat recovery chamber and is connected with the water-cooled wall through a rising pipe and a falling pipe, and the top of the steam drum is provided with an oxygen removing head; a track is arranged in the waste heat recovery chamber, and the magnesium fused lump carrying trolley can move along the track; the waste heat recovery chamber is an annular waste heat recovery chamber; the annular waste heat recovery chamber consists of a top water-cooling wall, an inner annular water-cooling wall and an outer annular water-cooling wall which form a closed annular space, a waste heat recovery chamber inlet and a waste heat recovery chamber outlet are arranged on the side surface of the annular space, and the waste heat recovery chamber inlet and the waste heat recovery chamber outlet are adjacently arranged and are respectively sealed by an inlet door and an outlet door; the magnesium fused lump bearing trolley is a rotary trolley, the track is an annular track, and the rotary trolley is driven by the trolley driving device to do circular motion along the annular track.
2. The device for recovering waste heat of the fused magnesium melt lump with the self-deoxidizing function as set forth in claim 1, wherein the water-cooled wall is a membrane water-cooled wall.
3. The device for recovering waste heat of the fused magnesium melting lump with the self-deoxidizing function according to claim 1, wherein an upper header is arranged at the top of the water-cooled wall, a lower header is arranged at the bottom of the water-cooled wall, the lower header is connected with a steam drum through a down pipe, and the upper header is connected with the steam drum through a rising pipe.
4. The electric smelting magnesium melting lump waste heat recovery device with the self-deoxidizing function according to claim 1, wherein a steam-water separation device is arranged in the steam drum, and a safety valve, a pressure gauge, a water level gauge and an emergency water discharge pipe are arranged on the steam drum; the bottom of the steam drum is provided with a water outlet pipe; the upper part of the deoxidizing head is provided with a water inlet, and the top of the deoxidizing head is provided with an exhaust port.
5. The electric smelting magnesium melting lump waste heat recovery device with the self-deoxidizing function according to claim 1, wherein the bottom end of the outer ring water-cooled wall is communicated through the outer ring of the lower header, and the bottom end of the inner ring water-cooled wall is communicated through the inner ring of the lower header; the top end of the outer ring water-cooling wall is communicated with the outer end of the top water-cooling wall through an upper header outer ring, and the top end of the inner ring water-cooling wall is communicated with the inner end of the top water-cooling wall through an upper header inner ring; the inner ring of the lower header is communicated with the steam drum through a central pipe, and the central pipe is communicated with the steam drum through an inner down pipe; the outer ring of the lower header is communicated with the steam drum through an outer downcomer; the inner ring of the upper header is connected with the heat storage container through a plurality of ascending pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811469100.3A CN109737759B (en) | 2018-12-04 | 2018-12-04 | Electric smelting magnesium melting lump waste heat recovery device with self-deoxidizing function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811469100.3A CN109737759B (en) | 2018-12-04 | 2018-12-04 | Electric smelting magnesium melting lump waste heat recovery device with self-deoxidizing function |
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| CN109737759A CN109737759A (en) | 2019-05-10 |
| CN109737759B true CN109737759B (en) | 2024-04-26 |
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| CN109737759A (en) | 2019-05-10 |
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