CN113899220A - Magnesium slag waste heat utilization system - Google Patents
Magnesium slag waste heat utilization system Download PDFInfo
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- CN113899220A CN113899220A CN202111227736.9A CN202111227736A CN113899220A CN 113899220 A CN113899220 A CN 113899220A CN 202111227736 A CN202111227736 A CN 202111227736A CN 113899220 A CN113899220 A CN 113899220A
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- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
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- 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
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- 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
Abstract
The invention provides a magnesium slag waste heat utilization system, which comprises a heat exchange bin; the first dust remover is communicated with the inside of the heat exchange bin and can remove dust from the first airflow flowing out of the heat exchange bin; the heat exchanger comprises a heat exchanger shell and a heat exchange pipeline which is arranged in the heat exchanger shell and is used for circulating combustion-supporting air, a first airflow which flows out of the first dust remover can exchange heat with the combustion-supporting air, and the combustion-supporting air is conveyed into the Pidgeon furnace after exchanging heat with the first airflow; and the air entraining device can drive the first air to enter the heat exchange bin and discharge the first air to the external environment after sequentially passing through the heat exchange bin, the first dust remover and the heat exchanger. According to the invention, cold air in the external environment is forcibly introduced into the heat exchange bin by the air-introducing device, contacts with high-temperature magnesium slag in the heat exchange bin for heat exchange to form high-temperature first air flow, exchanges heat with cold combustion-supporting air in a heat exchange pipeline of the heat exchanger, and heated combustion-supporting hot air is introduced into the Pidgeon furnace to support combustion of fuel in the furnace, so that the aim of saving coal gas can be fulfilled.
Description
Technical Field
The invention belongs to the technical field of magnesium smelting resources and waste heat utilization, and particularly relates to a magnesium slag waste heat utilization system.
Background
The Pidgeon method is generally adopted for producing raw magnesium in China, belongs to a thermal reduction method, and has the advantages of simple technology and low equipment cost, but the energy consumption is high, the heat utilization rate is low, and simultaneously, a large amount of reduced magnesium slag is generated, the reduced magnesium slag is generated along with the magnesium reduction process, the tapping temperature is high, generally about 1000 ℃, the reduced magnesium slag contains a large amount of heat energy, the heat of the magnesium slag is rarely recycled in the production, and the hot magnesium slag is usually placed in the air for natural cooling, so that the heat is wasted. Research on the utilization of magnesium slag is mainly focused on recycling, such as: the cooled magnesium slag is applied to manufacture cement, building bricks and the like; the research on the recovery of the magnesium slag waste heat is not much, the research is mainly focused on the steam production by using a waste heat boiler, and the waste heat utilization is not sufficient.
Disclosure of Invention
Therefore, the invention provides a magnesium slag waste heat utilization system which can overcome the defect that magnesium slag waste heat is not fully utilized in the related technology.
In order to solve the above problems, the present invention provides a magnesium slag waste heat utilization system, comprising:
the heat exchange bin is used for receiving magnesium slag discharged from a slag outlet of the Pidgeon furnace;
the first dust remover is communicated with the interior of the heat exchange bin and can remove dust from the first airflow flowing out of the heat exchange bin;
the heat exchanger comprises a heat exchanger shell and a heat exchange pipeline which is arranged in the heat exchanger shell and is used for circulating combustion-supporting air, a first airflow which flows out of the first dust remover can exchange heat with the combustion-supporting air, and the combustion-supporting air is conveyed into the Pidgeon furnace after exchanging heat with the first airflow;
and the air entraining device can drive the first air to enter the heat exchange bin and discharge the first air to the external environment after passing through the heat exchange bin, the first dust remover and the heat exchanger in sequence.
In some embodiments of the present invention, the substrate is,
the heat exchange bin comprises a bin body, a crawler conveying device is arranged in the bin body, the crawler conveying device can convey magnesium slag entering the heat exchange bin to a second end from a first end of the crawler conveying device, and the magnesium slag can fall down under the action of self weight at the second end.
In some embodiments of the present invention, the substrate is,
the crawler belt conveying devices are provided with two groups, the two groups of crawler belt conveying devices are arranged at intervals up and down along the height of the bin body, and the second ends of one group of the two groups and the second ends of the other group of the two groups are staggered in the height direction.
In some embodiments of the present invention, the substrate is,
the second end of the crawler conveyor is higher in elevation than the first end it has.
In some embodiments of the present invention, the substrate is,
the top of the bin body is provided with a grid; and/or a first gravity self-locking slag outlet is arranged at the bottom of the bin body.
In some embodiments of the present invention, the substrate is,
the first dust remover is provided with a dust removing shell, the dust removing shell is provided with a first inner wall surface and a second inner wall surface which are oppositely arranged, the first inner wall surface is provided with a plurality of first baffle plates which are arranged at intervals along the height direction, the first baffle plates are connected with a first baffle plate connecting rod, the horizontal included angle of the first baffle plates can be adjusted through a first angle adjuster, the second inner wall surface is provided with a plurality of second baffle plates which are arranged at intervals along the height direction, the second baffle plates are connected with a second baffle plate connecting rod, the horizontal included angle of the second baffle plates can be adjusted through a second angle adjuster, the first baffle plates and the second baffle plates are alternately arranged in the height direction, and the free ends of the first baffle plates and the free ends of the second baffle plates form cross.
In some embodiments of the present invention, the substrate is,
the outer part of the dust removal shell is coated with a heat insulation material; and/or a second gravity self-locking slag outlet is arranged at the bottom of the dust removal shell.
In some embodiments of the present invention, the substrate is,
the heat exchanger shell is provided with an air inlet and an air outlet, the heat exchange pipeline is provided with an air flow inlet and an air flow outlet, the air flow inlet is arranged corresponding to the air outlet, and the air flow outlet is arranged corresponding to the air inlet; and/or a second dust remover is connected between the heat exchanger and the air entraining device, and the air entraining device can drive the first air to enter the heat exchange bin and discharge the first air to the external environment after sequentially passing through the heat exchange bin, the first dust remover, the heat exchanger and the second dust remover; and/or the bottom plate of the heat exchanger housing is inclined downwards along the flow direction of the first airflow in the heat exchanger.
In some embodiments of the present invention, the substrate is,
the heat exchange pipeline between the airflow inlet and the airflow outlet extends in a snake shape; and/or the second dust remover is a bag-type dust remover; and/or the outer side of the heat exchanger shell is coated with a heat insulation material.
In some embodiments of the present invention, the substrate is,
an included angle between the bottom plate and the horizontal plane is B, and the B is 10 degrees; and/or a third gravity self-locking slag outlet is arranged at the lowest position of the bottom plate.
According to the magnesium slag waste heat utilization system provided by the invention, cold air in an external environment is forcibly introduced into the heat exchange bin by the air entraining device, contacts with high-temperature magnesium slag in the heat exchange bin for heat exchange to form high-temperature first air flow, the first air flow containing a large amount of dust exchanges heat with cold combustion-supporting air in a heat exchange pipeline of the heat exchanger after primary dust removal is carried out on the first air flow by the first dust remover, and the heated combustion-supporting hot air is introduced into the Pidgeon furnace to realize combustion supporting of fuel in the furnace, so that the aim of saving coal gas can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a magnesium slag waste heat utilization system according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the internal structure of the first dust collector in FIG. 1;
FIG. 3 is a schematic horizontal cross-section of the first precipitator of FIG. 1;
FIG. 4 is a schematic structural view (front view) of the first angle adjuster or the second angle adjuster of FIG. 3;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a top view of FIG. 4;
FIG. 7 is a schematic view of the internal structure of the heat exchanger of FIG. 1;
fig. 8 is a schematic horizontal sectional view of fig. 5.
The reference numerals are represented as:
1. a heat exchange bin; 11. a bin body; 12. a crawler belt conveyor; 13. a grid; 14. a first gravity self-locking slag outlet; 2. pidgeon furnace; 21. a slag outlet; 3. a first dust remover; 31. a dust removal housing; 32. a first baffle plate; 33. a second baffle; 34. a second gravity self-locking slag outlet; 4. a heat exchanger; 41. a heat exchanger housing; 42. an air inlet; 43. an air outlet; 44. a third gravity self-locking slag outlet; 45. a heat exchange conduit; 451. an air flow introduction port; 452. an airflow outlet; 5. a gas-entraining device; 6. a second dust remover; 7. a thermal insulation material; 81. a first angle adjuster; 82. a first baffle connecting rod; 83. a second angle adjuster; 84. a second baffle connecting rod; 85. a slide bar; 9. adjusting the screw rod; 10. a sliding adjustment member.
Detailed Description
Referring to fig. 1 to 8 in combination, according to an embodiment of the present invention, there is provided a magnesium slag waste heat utilization system, including: the heat exchange bin 1 is used for receiving magnesium slag discharged from a slag outlet 21 of the Pidgeon furnace 2; the first dust remover 3 is communicated with the interior of the heat exchange bin 1 and can remove dust from the first airflow flowing out of the heat exchange bin 1; the heat exchanger 4 comprises a heat exchanger shell 41 and a heat exchange pipeline 45 which is arranged in the heat exchanger shell and is used for circulating combustion air, a first air flow flowing out of the first dust remover 3 can exchange heat with the combustion air, and the combustion air is conveyed into the Pidgeon furnace 2 after exchanging heat with the first air flow; the bleed air device 5 (for example, a common bleed air machine is specifically adopted) can drive the first air into the heat exchange bin 1 and sequentially pass through the heat exchange bin 1, the first dust remover 3 and the heat exchanger 4 and then discharge the first air into the external environment, it should be noted that the first air flow and the combustion air may be identical in composition, or certainly may be different in some cases, and in the technical scheme, the purpose of distinguishing and naming the first air flow is to clearly describe the technical scheme of the present invention. In a specific embodiment, the first air flow and the combustion air are both from air in the external environment, and the combustion air is introduced into the pidgeon furnace 2 after the first air flow is heated by heat exchange to assist the combustion of the fuel therein. In this solution, the cold air in the external environment is forcibly introduced into the heat exchange silo 1 by the air-entraining device 5, the high-temperature magnesium slag in the heat exchange bin 1 is contacted with the high-temperature magnesium slag for heat exchange to form high-temperature first airflow, after the first airflow containing a large amount of dust passes through the first dust remover 3 for primary dust removal, exchanges heat with cold combustion-supporting air in a heat exchange pipeline 45 of the heat exchanger 4, heated combustion-supporting hot air is introduced into the Pidgeon furnace 2 to realize combustion-supporting of fuel in the furnace, the aim of saving coal gas can be fulfilled, and as required, in the invention, the first airflow containing dust and clean combustion-supporting air are adopted to exchange heat and then the combustion-supporting air is introduced into the hearth, and the first airflow containing dust is not directly adopted, so that the blockage of the heat accumulator in the Pidgeon furnace 2 can be prevented, high-temperature dust removal equipment is not needed for removing dust, the equipment cost is reduced, and the method is more economical and more convenient for subsequent maintenance. The first dust collector 3 is arranged before the heat exchanger 4, and dust in the first air flow can be removed to prevent the air flow channel in the first dust collector 3 from being blocked.
In some embodiments, the heat exchange chamber 1 comprises a chamber body 11, the chamber body 11 has a crawler conveyor 12 therein, the crawler conveyor 12 can convey the magnesium slag entering the heat exchange chamber 1 from a first end to a second end of the crawler conveyor 12, and the magnesium slag can fall under the action of its own weight at the second end. The crawler conveying device 12 specifically adopts a metal crawler, and takes the principle that the crawler conveying device can endure the high temperature of the magnesium slag as a principle, it can be understood that the crawler conveying device 12 further comprises a driving device (such as a rotating motor or a hydraulic motor) capable of driving the metal crawler to rotate and a corresponding roller structure, and this part of structure is used as a conventional design of conveying equipment, and details are not repeated in the present invention. In the technical scheme, the crawler belt conveying device 12 can convey the magnesium slag carried on the crawler belt conveying device from one side (corresponding to the first end) of the bin body 11 to the other side (corresponding to the second end) of the bin body 11, so that the stroke of the magnesium slag in the heat exchange bin 1 can be increased, the high-temperature magnesium slag can fully exchange heat with the first airflow, and the heat exchange efficiency is ensured.
In some embodiments, the crawler conveyors 12 have at least two sets, specifically two sets as an example, the two sets of crawler conveyors 12 are arranged at intervals up and down along the height of the bin body 11, and the second ends of one set of the two sets of the crawler conveyors are staggered with the second ends of the other set of the two sets of the crawler conveyors along the height direction, so that the magnesium slag in the crawler conveyor 12 with the upper height can freely fall from the second ends to the crawler conveyors 12 with the lower height, and the two crawler conveyors 12 run in parallel with each other, so that the stroke of the magnesium slag in the heat exchange bin 1 can be further increased, and the heat exchange efficiency is improved, so that the cooling of the magnesium slag is more sufficient. Further, the second end of the crawler conveyor 12 is higher than the first end, that is, the crawler conveyor 12 is arranged obliquely, so that the magnesium slag on the crawler conveyor has an upward-throwing tendency at the second end, the stroke of the magnesium slag in the heat exchange bin 1 can be further increased, and the heat exchange efficiency is further improved.
The metal track is preferably in a hollow hole structure, and the metal track with the hollow hole structure can allow the first airflow to pass through the hollow hole structure, so that the magnesium slag dust on the metal track can be taken away by utilizing the wind speed, and the accumulation of the magnesium slag dust on the metal track can be prevented.
The top of the bin body 11 is provided with a grid 13 to prevent impurities and reduction tanks from falling into the bin body 11; the bottom of the bin body 11 is provided with a first gravity self-locking slag outlet 14 which can automatically discharge magnesium slag by means of gravity after sufficient magnesium slag is accumulated in the bottom space of the bin body 11.
The first dust remover 3 is provided with a dust removing shell 31, the dust removing shell 31 is provided with a first inner wall surface and a second inner wall surface which are oppositely arranged, the first inner wall surface is provided with a plurality of first baffle plates 32 which are arranged at intervals along the height direction, the first baffle plates 32 are connected with a first baffle plate connecting rod 82, the horizontal included angle of the first baffle plates 32 can be adjusted through a first angle adjuster 81, the second inner wall surface is provided with a plurality of second baffle plates 33 which are arranged at intervals along the height direction, the second baffle plates 33 are connected with a second baffle plate connecting rod 84, the horizontal included angle of the second baffle plates 33 can be adjusted through a second angle adjuster 83, the first baffle plates 32 and the second baffle plates 33 are alternately arranged in the height direction, and the free ends of the first baffle plates 32 and the free ends of the second baffle plates 33 form a crossed end. The first baffle 32 and the second baffle 33 can form a barrier to a large amount of dust carried in the first airflow, so that large-particle dust in the large-particle dust can fall to the bottom of the dust removal shell 31 in a separated manner, and preferably, the bottom of the dust removal shell 31 is provided with a second gravity self-locking slag outlet 34, so that the magnesium slag can be automatically discharged by gravity after enough magnesium slag is accumulated in the bottom space of the first dust remover 3. In addition, the first angle adjuster 81 and the second angle adjuster 83 may respectively adjust the inclination angles of the first baffle 32 and the second baffle 33, that is, the horizontal included angle, so that the size of the horizontal included angle is more matched with the repose angle of the magnesium slag (or the magnesium sand), thereby further effectively preventing the accumulation of the magnesium slag or the magnesium sand on the baffles, and in a specific embodiment, the repose angle of the magnesium slag (or the magnesium sand) is generally 40 ° to 50 °, so that the horizontal included angles of the first angle adjuster 81 and the second angle adjuster 83 may be adjusted to be not less than 40 °, specifically, for example, 45 °.
The first angle adjuster 81 and the second angle adjuster 83 are preferably identical in structure, and specifically, the first angle adjuster 81 has a housing (not shown), a sliding adjuster 10 is disposed in the housing, the sliding adjuster 10 is slidably connected to the housing, and can push the sliding adjuster 10 to linearly displace under the screwing action of an adjusting screw 9 (which is in threaded connection with the housing), corresponding sliding grooves (the specific shape of which is reasonably designed according to the angle adjusting range of the first baffle 32, and is preferably an arc at one end in one embodiment) are configured on opposite wall surfaces of the sliding adjuster 10, sliding rods 85 are respectively disposed on opposite sides of the first baffle connecting rod 82, and the sliding rods 85 are inserted into the sliding grooves.
In order to improve the utilization efficiency of the waste heat, preferably, the dust removal housing 31 is externally coated with a thermal insulation material 7, and/or the heat exchanger housing 41 is externally coated with a thermal insulation material 7.
In some embodiments, the heat exchanger shell 41 has an air inlet 42 and an air outlet 43 corresponding to the first air flow, the heat exchange pipe 45 has an air inlet 451 and an air outlet 452 corresponding to the combustion air, the air inlet 451 is disposed corresponding to the air outlet 43, and the air outlet 452 is disposed corresponding to the air inlet 42, so that the flow direction of the combustion air and the flow direction of the first air flow have counter flow pipe sections, which can improve the heat exchange efficiency of both the first air flow and the combustion air. Further, the heat exchange pipe 45 between the airflow inlet 451 and the airflow outlet 452 extends in a serpentine shape, so that the heat exchange contact area between the combustion air and the first airflow is further increased, and the heat exchange efficiency is improved.
Further, a second dust remover 6 is connected between the heat exchanger 4 and the air-entraining device 5, and because the temperature of the first air flow is reduced at this time, the second dust remover 6 may be a bag-type dust remover, the second dust remover 6 can further filter dust in the first air flow, and the air-entraining device 5 can drive the first air to enter the heat exchange bin 1 and discharge the first air to the external environment after passing through the heat exchange bin 1, the first dust remover 3, the heat exchanger 4 and the second dust remover 6 in sequence.
The bottom plate of the heat exchanger shell 41 is inclined downwards along the flowing direction of the first air flow in the heat exchanger 4, so that dust or magnesium slag possibly carried in the bottom plate can be accumulated at the low position of the bottom plate by utilizing the flowing impulse of the first air flow, at the moment, a third gravity self-locking slag outlet 44 is arranged at the lowest position of the bottom plate, and the magnesium slag is automatically discharged by means of gravity after enough magnesium slag is accumulated in the bottom space of the heat exchanger 4. In some embodiments, the bottom plate is at an angle B of 10 ° to the horizontal,
it is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.
Claims (10)
1. The magnesium slag waste heat utilization system is characterized by comprising:
the heat exchange bin (1) is used for receiving magnesium slag discharged from a slag outlet (21) of the Pidgeon furnace (2);
the first dust remover (3) is communicated with the interior of the heat exchange bin (1) and can remove dust from the first airflow flowing out of the heat exchange bin (1);
the heat exchanger (4) comprises a heat exchanger shell (41) and a heat exchange pipeline (45) which is arranged in the heat exchanger shell and used for circulating combustion-supporting air, a first air flow flowing out of the first dust remover (3) can exchange heat with the combustion-supporting air, and the combustion-supporting air is conveyed into the Pidgeon furnace (2) after exchanging heat with the first air flow;
and the air entraining device (5) can drive the first air to enter the heat exchange bin (1) and discharge the first air to the external environment after sequentially passing through the heat exchange bin (1), the first dust remover (3) and the heat exchanger (4).
2. The magnesium slag waste heat utilization system according to claim 1,
the heat exchange bin (1) comprises a bin body (11), a crawler conveying device (12) is arranged in the bin body (11), the crawler conveying device (12) can convey magnesium slag entering the heat exchange bin (1) to a second end from a first end of the crawler conveying device (12), and the magnesium slag can fall down under the action of self weight at the second end.
3. The magnesium slag waste heat utilization system according to claim 2,
the crawler belt conveying devices (12) are provided with two groups, the two groups of crawler belt conveying devices (12) are arranged at intervals up and down along the height of the bin body (11), and the second ends of one group of the two groups are staggered with the second ends of the other group of the two groups of the crawler belt conveying devices along the height direction.
4. The magnesium slag waste heat utilization system according to claim 2,
the second end of the caterpillar conveyor (12) is higher in height than the first end it has.
5. The magnesium slag waste heat utilization system according to claim 2,
the top of the bin body (11) is provided with a grid (13); and/or a first gravity self-locking slag outlet (14) is arranged at the bottom of the bin body (11).
6. The magnesium slag waste heat utilization system according to claim 1,
the first dust collector (3) is provided with a dust collection shell (31), the dust collection shell (31) is provided with a first inner wall surface and a second inner wall surface which are oppositely arranged, the first inner wall surface is provided with a plurality of first baffles (32) which are arranged at intervals along the height direction, the first baffles (32) are connected with first baffle connecting rods (82), and the horizontal included angle of the first baffle (32) can be adjusted by a first angle adjuster (81), the second inner wall surface is provided with a plurality of second baffles (33) which are arranged at intervals along the height direction, the plurality of second baffles (33) are connected with second baffle connecting rods (84), the horizontal included angle of the second baffle plates (33) can be adjusted through a second angle adjuster (83), the plurality of first baffle plates (32) and the plurality of second baffle plates (33) are alternately arranged in the height direction, and the free end of the first baffle (32) and the free end of the second baffle (33) form a cross.
7. The magnesium slag waste heat utilization system according to claim 6,
the outer part of the dust removal shell (31) is coated with a heat insulation material (7); and/or a second gravity self-locking slag outlet (34) is arranged at the bottom of the dust removal shell (31).
8. The magnesium slag waste heat utilization system according to claim 1,
the heat exchanger shell (41) is provided with an air inlet (42) and an air outlet (43), the heat exchange pipeline (45) is provided with an air flow inlet (451) and an air flow outlet (452), the air flow inlet (451) is arranged corresponding to the air outlet (43), and the air flow outlet (452) is arranged corresponding to the air inlet (42); and/or a second dust remover (6) is connected between the heat exchanger (4) and the air-entraining device (5), and the air-entraining device (5) can drive the first air to enter the heat exchange bin (1) and discharge the first air to the external environment after sequentially passing through the heat exchange bin (1), the first dust remover (3), the heat exchanger (4) and the second dust remover (6); and/or the floor of the heat exchanger housing (41) is inclined downwards in the flow direction of the first gas flow inside the heat exchanger (4).
9. The magnesium slag waste heat utilization system according to claim 8,
the heat exchange pipe (45) between the air flow inlet (451) and the air flow outlet (452) extends in a serpentine shape; and/or the second dust remover (6) is a bag-type dust remover; and/or the outer side of the heat exchanger shell (41) is coated with a heat insulation material (7).
10. The magnesium slag waste heat utilization system according to claim 8,
an included angle between the bottom plate and the horizontal plane is B, and the B is 10 degrees; and/or a third gravity self-locking slag outlet (44) is arranged at the lowest position of the bottom plate.
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| CN114608335A (en) * | 2022-03-25 | 2022-06-10 | 清华大学 | Heat exchange enhanced sinter waste heat recovery device and recovery method |
| CN114705054A (en) * | 2022-03-25 | 2022-07-05 | 清华大学 | Multi-bin heat exchange sinter waste heat recovery device and recovery method |
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