CN218910467U

CN218910467U - Heat accumulating type energy-saving refining furnace for metal magnesium smelting gas

Info

Publication number: CN218910467U
Application number: CN202222335570.9U
Authority: CN
Inventors: 郝丰林
Original assignee: Taida Carbonification Co ltd
Current assignee: Taida Carbonification Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2023-04-25
Anticipated expiration: 2032-09-02

Abstract

The utility model discloses a heat accumulating type energy-saving refining furnace for smelting gas by using magnesium metal, which comprises a furnace body: the furnace body is by refining pot, stove outer covering, bellows and refining pot circle apron, the bottom side of stove outer covering is built by laying bricks or stones to the stove bottom, the upside of the resistant firebrick of stove bottom is built by laying bricks or stones to prop up a pot resistant firebrick, prop up the upside of the resistant firebrick of pot and be provided with the refining pot, the refining pot circle apron is installed to the upside of stove outer covering and the downside that is located the refining pot flange, the side wall resistant firebrick has all been built by laying bricks or stones to refining pot circle apron lower part furnace inner wall, the outside of the resistant firebrick of side wall is provided with furnace side wall insulation material, the equal fixedly connected with bellows in front and back both ends of stove outer covering. The gas enters the hearth along the tangent line of the inner wall of the hearth, hot air after heat absorption enters the hearth along the tangent direction of the outer wall of the refining pot, the outer wall of the refining pot can be effectively protected by the hot air, the damage to the refining pot caused by direct blowing of the gas flame on the outer wall of the refining pot is avoided, and the service life of the refining pot can be greatly prolonged.

Description

Heat accumulating type energy-saving refining furnace for metal magnesium smelting gas

Technical Field

The utility model relates to the field of nonferrous metal smelting, in particular to a heat accumulating type energy-saving refining furnace for gas generated in smelting magnesium metal.

Background

Magnesium metal is increasingly used as a light metal. At present, a Pidgeon method is generally adopted at home and abroad to produce crude magnesium through a reduction furnace, and then a refining furnace is used for adding a solvent to remelt and pour into magnesium ingots for sale.

The refining furnace is used as smelting equipment for producing magnesium metal, and the energy consumption of the refining furnace has a certain influence on the production cost of magnesium metal. The existing refining furnace mainly comprises a direct coal gas burning and direct discharging refining furnace and a coal gas refining furnace with heat accumulating type burners and a plurality of refining pots at two ends of the direct coal gas burning and direct discharging refining furnace.

The direct-fired refining furnace is characterized in that coal gas and air are blown into a hearth of the refining furnace through a fan to be combusted, flue gas is discharged through a smoke discharge pipeline, and the temperature of the hearth is controlled through adjustment of a valve.

The gas refining furnace with regenerative burners at two ends and multiple refining pots at two ends is a cuboid refining furnace with regenerative burners at two ends, combustion chambers are arranged between the burners and a hearth and are separated by fire-blocking walls, and the hearth is provided with multiple refining pots

Disclosure of Invention

The utility model aims to at least solve one of the technical problems in the prior art, and provides a metal magnesium smelting gas heat accumulating type energy-saving refining furnace which is convenient for prolonging the service life of a refining pot.

The utility model also provides the heat accumulating type energy-saving refining furnace for the metal magnesium smelting gas, which comprises a furnace body: the furnace body is composed of a refining pot, a furnace shell, a bellows and a refining pot ring cover plate, wherein furnace bottom refractory bricks are built on the bottom side of the furnace shell, supporting pot refractory bricks are built on the upper side of the furnace bottom refractory bricks, a refining pot is arranged on the upper side of the supporting pot refractory bricks, the refining pot ring cover plate is arranged on the upper side of the furnace shell and positioned on the lower side of a refining pot flange, side wall refractory bricks are built on the inner wall of a hearth at the lower part of the refining pot ring cover plate, hearth side wall heat insulation materials are arranged on the outer side of the side wall refractory bricks, bellows are fixedly connected to the front end and the rear end of the furnace shell, ceramic heat accumulators are arranged in the furnace shell, burner refractory bricks are built on the outer side of the ceramic heat accumulators, refractory bricks are built on the inner side of the furnace shell and positioned on the upper side of the side wall, and heat insulation materials are arranged on the inner wall of the furnace shell;

the air-conditioning device comprises a front side, an output end of an air box, a front side air branch pipe, a rear side, an output end of the air box, a rear side air branch pipe, an air branch pipe manual adjusting valve, a four-way reversing valve, a smoke exhaust main pipe and a reversing valve cylinder, wherein the output end of the air box is fixedly connected with the front side air branch pipe, the rear side of the air box is fixedly connected with the rear side air branch pipe, the air branch pipe manual adjusting valve is arranged on the outer sides of the front side air branch pipe and the rear side air branch pipe, the outer ends of the front side air branch pipe and the rear side air branch pipe are fixedly connected to the four-way reversing valve, the smoke exhaust main pipe is fixedly connected with the smoke exhaust main pipe on the outer side of the four-way reversing valve, the blower main pipe is fixedly connected with the inner side of the four-way reversing valve, and the reversing valve cylinder is arranged on the upper side of the four-way reversing valve.

The burner refractory brick is of a hollow structure, the front side is fixedly connected with a front side gas branch pipe, the rear side is fixedly connected with a rear side gas branch pipe, manual gas branch pipe regulating valves are arranged on pipelines connected with the burner brick and the rear side gas branch pipe and the front side gas branch pipe, a gas condensate discharging ball valve is arranged at the lower end, close to a furnace shell, of the rear side gas branch pipe, a rear side gas branch pipe pneumatic quick-closing valve is arranged at the outer side of the rear side gas branch pipe, and a front side gas branch pipe pneumatic quick-closing valve is arranged at the outer side of the front side gas branch pipe.

The outer ends of the rear side gas branch pipe and the front side gas branch pipe are fixedly connected with a gas main pipe, a manual gate valve of the gas main pipe, a pneumatic quick-closing valve of the gas main pipe and an electric valve of the gas main pipe are arranged on the outer side of the gas main pipe, and the upper end of the gas main pipe is fixedly connected with a gas main pipe.

And a smoke exhaust pipeline valve is arranged on the outer side of the smoke exhaust main pipe.

The inner side of the four-way reversing valve is fixedly connected with a main blower pipeline, the outer end of the main blower pipeline is fixedly connected with a blower, and a main blower pipeline adjusting valve is arranged between the blower and the four-way reversing valve.

The scheme has the beneficial effects that:

1. the gas enters the hearth along the tangent line of the inner wall of the hearth through the burner block, and hot air after heat absorption enters the hearth along the tangent line direction of the outer wall of the refining pot to form rotary flame along the inner wall of the hearth. The hot air can effectively protect the outer wall of the refining pot, avoid the damage of the refining pot caused by direct blowing of gas flame on the outer wall of the refining pot, and greatly prolong the service life of the refining pot.

2. The refining furnace has good heat preservation effect, so that the environment temperature of a crude magnesium smelting workshop is lower, the working environment of a stokehole worker is comfortable, and the labor intensity is lower.

3. The ceramic heat-exchange cavity of the refining furnace is increased, so that the utilization rate of heat energy is greatly improved, the exhaust gas temperature is reduced, the energy-saving effect is very obvious (more than 50% of energy is saved compared with a direct-fired refining furnace and more than 20% of energy is saved compared with a symmetrically arranged heat-accumulation type refining furnace), and the smelting cost of magnesium metal is greatly reduced.

4. The temperature of the hearth is very convenient to adjust by using a single furnace and a single pot.

5. Because the front and the rear of the hearth are provided with the upper, the middle and the lower layers of burners, and the front and the rear sides circularly reverse combustion, the temperature around the hearth outside the refining pot is ensured to be uniformly distributed, the coarse magnesium melting speed can be effectively improved, and the production efficiency is improved.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is a front view of a metal magnesium smelting gas heat accumulating type energy saving refining furnace of the present utility model;

FIG. 2 is a top partial cross-sectional view of a regenerative energy-saving refining furnace for smelting gas from magnesium metal in accordance with the present utility model;

fig. 3 is a right side cross-sectional view of a metal magnesium smelting gas heat accumulating type energy-saving refining furnace of the utility model.

Legend description:

1. a furnace body; 2. a four-way reversing valve; 3. a reversing valve cylinder; 4. a smoke exhaust pipeline valve; 5. an air blast pipeline adjusting valve; 6. manual gate valve of main gas pipeline; 7. the gas main pipeline is pneumatic and quick to close the valve; 8. an electric valve of the main gas pipeline; 9. a main gas pipe; 10. a gas main pipe; 11. a smoke exhaust main pipe; 12. a main smoke exhaust pipe; 13. a main blower pipe; 14. a blower; 15. an air branch pipe manual regulating valve; 16. a manual regulating valve of the gas branch pipe; 17. gas condensate discharging ball valve; 18. a rear side air branch pipe; 19. a refining pot; 20. a side wall heat insulation material; 21. a heat insulating material; 22. side wall refractory bricks; 23. a furnace shell; 24. burner refractory bricks; 25. a ceramic heat accumulator; 26. a wind box; 27. a front side air branch pipe; 28. a rear side gas branch pipe; 29. the rear side gas branch pipe is provided with a pneumatic quick-closing valve; 30. a front side gas branch pipe; 31. a front side gas branch pipe pneumatic switch valve; 32. a refining pot ring cover plate; 33. closing up refractory bricks in a hearth; 34. supporting a pot refractory brick; 35. and (3) refractory bricks at the bottom of the furnace.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Referring to fig. 1-3, the embodiment of the utility model relates to a heat accumulating type energy-saving refining furnace for smelting metal magnesium by gas, which comprises a furnace body 1: the furnace body 1 is composed of a refining pot 19, a furnace shell 23, a bellows 26 and a refining pot ring cover plate 32, a furnace bottom refractory brick 35 is built on the bottom side of the furnace shell 23, a supporting pot refractory brick 34 is arranged on the upper side of the furnace bottom refractory brick 35, the refining pot 19 is installed on the upper side of the supporting pot refractory brick 34, the refining pot ring cover plate 32 is installed on the upper side of the furnace shell 23 and the lower side of a flange of the refining pot 19, a side wall heat insulation material 20 is arranged below the refining pot ring cover plate 32, side wall refractory bricks 22 are built on the inner side of a furnace, side wall heat insulation materials 20 are arranged on the outer sides of the side wall refractory bricks 22, bellows 26 are fixedly connected with the right sides of the front end and the rear end of the furnace shell 23, a ceramic heat accumulator 25 is arranged in the furnace shell 23, a burner refractory brick 24 is built on the outer side of the ceramic heat accumulator 25, a furnace closing-in 33 is arranged on the upper side of the inner side wall 22 of the furnace shell 23, and a heat insulation material 21 is arranged on the inner wall of the furnace shell 23.

The output end of the front side bellows 26 is fixedly connected with a front side air branch pipe 27, the output end of the rear side bellows 26 is fixedly connected with a rear side air branch pipe 18, the outer sides of the front side air branch pipe 27 and the rear side air branch pipe 18 are provided with air branch pipe manual adjusting valves 15, the outer ends of the front side air branch pipe 27 and the rear side air branch pipe 18 are respectively fixedly connected to the front side and the rear side of the four-way reversing valve 2, a smoke exhaust main pipe 12 is fixedly connected to the outer side of the four-way reversing valve 2, the upper end of the smoke exhaust main pipe 12 is fixedly connected with a smoke exhaust main pipe 11, the four-way reversing valve 2 is convenient to carry out reversing control on hearth smoke and combustion air, a reversing valve cylinder 3 is arranged on the upper side of the four-way reversing valve 2 and is convenient to provide a power source for the four-way reversing valve 2, a smoke exhaust pipe valve 4 is arranged on the smoke exhaust main pipe 12, the inner side of the four-way reversing valve 2 is connected with a blast main pipe 13, the outer end of the blast main pipe 13 is fixedly connected with a blast blower 14, a blast pipe adjusting valve 5 is arranged between the blast main pipe 14 and the four-way reversing valve 2, and the blast pipe adjusting valve 5 is convenient to adjust the blast volume of the blast blower 14.

The burner refractory bricks 24 are arranged in a hollow structure, the outer sides of the front burner refractory bricks 24 are fixedly connected with front side gas branch pipes 30, the outer sides of the rear burner refractory bricks 24 are fixedly connected with rear side gas branch pipes 28, the rear side gas branch pipes 28 and the front side gas branch pipes 30 are fixedly connected with gas branch pipe manual regulating valves 16 on connecting pipelines of burner inlets of the furnace shell 23, the gas flow of front, rear, middle and lower burners is conveniently regulated, the lower ends of the rear side gas branch pipes 28 and the front side gas branch pipes 30, which are close to the furnace shell 23, are provided with gas condensate outer ball discharge valves 17, the gas condensate outer ball discharge valves 17 are convenient for discharging gas condensate, the outer sides of the rear side gas branch pipes 28 are provided with rear side gas branch pipe pneumatic quick closing valves 29, the outer sides of the front side gas branch pipes 30 are provided with front side gas branch pipe pneumatic quick closing valves 31, the outer ends of the rear side gas branch pipes 28 and the front side gas branch pipes 30 are fixedly connected with gas main pipelines 9, the gas main pipelines 9 are provided with manual gate valves 6, the gas main pipelines are conveniently controlled by hand, the gas main pipeline pneumatic quick closing valves 7 and the main pipelines are conveniently cut off from the electric main pipelines 8, and the gas main pipelines are conveniently connected with the main pipelines 10 to the main pipelines 10 in a small gas main pipeline which are conveniently and quickly connected with the main pipeline 10.

Working principle: the gas enters along the tangential line of the outer side of the hearth through the front side gas branch pipe 30 of the refining pot 19 and the upper, middle and lower burners of the hearth, and is mixed with hot air entering the hearth along the tangential line of the outer wall of the refining pot 19 from the cavity of the front side ceramic heat accumulator 25 to burn, thereby forming rotary flame. The flames are uniformly distributed in the right hearth of the refining pot 19. At this time, the front side gas branch pipe pneumatic quick-closing valve 31 is in an open state, and the rear side gas branch pipe pneumatic quick-closing valve 29 is in a closed state; the front side air branch pipe 27 is in communication with the main blower pipe 13 through the four-way reversing valve 2, and the rear side air branch pipe 18 is in communication with the main smoke exhaust pipe 12 through the four-way reversing valve 2. After the flue gas absorbs a large amount of heat through the rear ceramic heat accumulator 25, the flue gas is discharged from the rear air branch pipe 18 to the smoke discharging main pipe 11 and enters the inlet of the induced draft fan of the desulfurization system.

After about 30 seconds of operation in this operating state, the front side gas branch pipe pneumatic quick-closing valve 31 is closed, the rear side gas branch pipe pneumatic quick-closing valve 29 is opened, the front side air branch pipe 27 is communicated with the main smoke discharge pipe 12 through the four-way reversing valve 2, and the rear side air branch pipe 18 is communicated with the main blower pipe 13 through the four-way reversing valve 2. The coal gas enters along the outer side tangential line of the hearth through a coal gas pipeline at the rear side of the refining pot 19 and the upper, middle and lower burners of the hearth, and is mixed with hot air entering the hearth along the outer wall tangential line of the refining pot 19 from the cavity of the rear ceramic heat accumulator 25 to burn, so that rotary flame is formed, and the flame is uniformly distributed in the left hearth of the refining pot 19. After the flue gas absorbs a large amount of heat through the front ceramic heat accumulator 25, the flue gas is discharged from the front air branch pipes 27 to the smoke discharging main pipe 11 and enters the inlet of the induced draft fan of the desulfurization system.

After 30 seconds of operation, the operation is switched to the last working state, the operation is circularly and reciprocally performed in such a way that the uniform distribution of the temperature of the hearth is ensured (the temperature of the hearth is always kept at 850-900 ℃ through the adjustment of each manual valve of an air pipeline and a gas pipeline), the temperature of the discharged smoke is reduced to 200-220 ℃ through the heat exchange of the ceramic heat accumulator 25, and the temperature of the discharged smoke is ensured through the adjustment of the reversing time.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims

1. The heat accumulating type energy-saving refining furnace for smelting the metal magnesium by using the coal gas is characterized by comprising a furnace body (1): the furnace body (1) is formed by a refining pot (19), a furnace shell (23), a bellows (26) and a refining pot ring cover plate (32), furnace bottom refractory bricks (35) are built on the bottom side of the furnace shell (23), a supporting pot refractory brick (34) is built on the upper side of the furnace bottom refractory bricks (35), a refining pot (19) is arranged on the upper side of the supporting pot refractory bricks (34), a refining pot ring cover plate (32) is arranged on the upper side of the furnace shell (23) and on the lower side of a flange of the refining pot (19), side wall refractory bricks (22) are built on the inner wall of a furnace at the lower part of the refining pot ring cover plate (32), a furnace side wall heat preservation material (20) is arranged on the outer side of the side wall refractory bricks (22), bellows (26) are fixedly connected to the front end and the rear end of the furnace shell (23), ceramic heat storages (25) are arranged in the furnace shell (23), refractory bricks (24) are built on the outer side of the ceramic heat storages (25), and a heat-insulating material (21) is arranged on the inner side of the furnace shell (23);

the air-conditioning device comprises a front side, an output end of a bellows (26) is fixedly connected with a front side air branch pipe (27), an output end of the bellows (26) is fixedly connected with a rear side air branch pipe (18) at the rear side, an air branch pipe manual adjusting valve (15) is arranged on the outer side of the front side air branch pipe (27) and the outer end of the rear side air branch pipe (18), the front side air branch pipe (27) and the outer end of the rear side air branch pipe (18) are fixedly connected to a four-way reversing valve (2), a smoke exhaust main pipe (12) is fixedly connected to the outer side of the four-way reversing valve (2), a smoke exhaust main pipe (11) is fixedly connected to the upper end of the smoke exhaust main pipe (12), a blower main pipe (13) is fixedly connected to the inner side of the four-way reversing valve (2), and a reversing valve cylinder (3) is arranged on the upper side of the four-way reversing valve (2).

2. The heat accumulating type energy-saving refining furnace for metal magnesium smelting gas according to claim 1, wherein the burner refractory brick (24) is of a hollow structure, a front side gas branch pipe (30) is fixedly connected to the outer side of the burner refractory brick (24), a rear side gas branch pipe (28) is fixedly connected to the outer side of the burner refractory brick (24), manual gas branch pipe regulating valves (16) are arranged on pipelines connected with the burner refractory brick through the rear side gas branch pipe (28) and the front side gas branch pipe (30), a gas condensate discharging ball valve (17) is arranged at the lower end, close to a furnace shell (23), of the rear side gas branch pipe (28), a rear side gas branch pipe pneumatic quick-closing valve (29) is arranged on the outer side of the rear side gas branch pipe (28), and a front side gas branch pipe pneumatic quick-closing valve (31) is arranged on the outer side of the front side gas branch pipe (30).

3. The heat accumulating type energy-saving refining furnace for metal magnesium smelting gas according to claim 2, wherein the outer ends of the rear side gas branch pipe (28) and the front side gas branch pipe (30) are fixedly connected with a gas main pipe (9), a manual gas main pipe gate valve (6), a pneumatic fast gas main pipe closing valve (7) and an electric gas main pipe valve (8) are arranged on the outer side of the gas main pipe (9), and the upper end of the gas main pipe (9) is fixedly connected with a gas main pipe (10).

4. The magnesium smelting gas heat accumulating type energy-saving refining furnace according to claim 1, wherein a smoke exhaust pipeline valve (4) is arranged on the outer side of the smoke exhaust main pipe (11).

5. The heat accumulating type energy-saving refining furnace for metal magnesium smelting gas according to claim 1, wherein a main blower pipe (13) is fixedly connected to the inner side of the four-way reversing valve (2), a main blower (14) is fixedly connected to the outer end of the main blower pipe (13), and a main blower pipe adjusting valve (5) is arranged on the main blower pipe (13) between the main blower (14) and the four-way reversing valve (2).