CN114307445A

CN114307445A - Utilize interior desulphurization unit of dry kiln of RKEF method smelting ferronickel

Info

Publication number: CN114307445A
Application number: CN202111458591.3A
Authority: CN
Inventors: 符號; 徐兴龙; 虞胜震
Original assignee: Yangzhou Yichuan Nickel Industry Co ltd
Current assignee: Yangzhou Yichuan Nickel Industry Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-12

Abstract

The invention belongs to the technical field of ferronickel smelting, and particularly relates to a drying kiln inner desulphurization device for smelting ferronickel by utilizing a RKEF method. According to the invention, through arranging the smoke outlet pipe, the dust removal box and the dust removal mechanism, dust contained in smoke can be filtered and accumulated in the dust removal box, through arranging the dust exhaust pipe and the valve, workers can collect and secondarily treat the dust so as to prevent metal elements still existing in the dust from being wasted, and through arranging the water tank, the water pump and the desulfurization mechanism, the gas subjected to dust removal can be desulfurized and filtered again, and then is conveyed to the chimney to be discharged, so that the load of subsequent purification is reduced, meanwhile, the purification effect can be obviously improved, and the discharge index is qualitatively improved.

Description

Utilize interior desulphurization unit of dry kiln of RKEF method smelting ferronickel

Technical Field

The invention relates to the technical field of ferronickel smelting, in particular to a desulphurization device in a drying kiln for smelting ferronickel by using a RKEF method.

Background

At present, the treatment method of laterite-nickel ore at home and abroad mainly comprises two smelting processes of a fire method and a wet method, wherein the fire method mainly comprises four processes: sintering-blast furnace process, rotary kiln-electric furnace smelting process, dominicangying bridge shaft furnace-electric furnace process and Japanese great Jiangshan rotary kiln direct reduction method. Wherein, the rotary kiln-electric furnace smelting process is the RKEF method, is an advanced and mature process for treating the laterite-nickel ore by the existing pyrometallurgical method, and is widely applied.

When ores are dried in the existing drying kiln, a large amount of sulfur oxides and dust are generated, the gas can be directly discharged into the atmosphere after being purified, otherwise serious pollution is caused to the atmosphere, but the purified gas still has some sulfur oxides or dust, the purification effect is incomplete, and certain pollution is still caused to the environment after being discharged, so that the problem is solved by the desulfurization device in the drying kiln for smelting ferronickel by utilizing the RKEF method.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a desulphurization device in a drying kiln for smelting ferronickel by using an RKEF method, which solves the problem of poor flue gas purification effect generated during the drying of the existing ore.

(II) technical scheme

The invention specifically adopts the following technical scheme for realizing the purpose:

a desulfurization device in a drying kiln for smelting ferronickel by utilizing a RKEF method comprises a bottom plate, a cylinder body is arranged above the bottom plate, the two ends of the cylinder body are respectively communicated with a kiln head cover and a kiln tail cover through bearings in a rotating manner, the surfaces of the kiln head cover and the kiln tail cover are respectively fixed at the top of the bottom plate through supporting legs, a first gear is fixedly arranged on the surface sleeve of the cylinder body, a driving mechanism for driving the first gear to rotate is arranged on the bottom plate, a smoke outlet pipe is arranged and communicated at the top of the kiln tail cover, a dust removal box is arranged at the top of the bottom plate, one end of the smoke outlet pipe is communicated with one side wall of the dust removal box, a dust removal mechanism is arranged in the dust removal box, a water tank and a water pump are respectively fixed at the top of the bottom of the dust removal box through four supporting legs, the water inlet end of the water pump is communicated with the water outlet end of the water tank through a connecting pipe, be provided with on the bottom plate and be used for desulfurization mechanism, the surface mounting intercommunication of kiln hood cover has the magazine, the surface mounting intercommunication of kiln hood cover has out the hopper, a lateral wall of kiln hood cover is fixed with the combustor, the top of bottom plate is provided with oil tank and burning fan respectively, the top at the bottom of bottom plate is fixed through the base to oil tank and burning fan, the top of oil tank is fixed with the oil pump, the feed liquor end of oil pump and the play liquid end of oil tank pass through the connecting tube intercommunication, the play liquid end of oil pump passes through connecting tube and combustor intercommunication, the air-out end installation intercommunication of burning fan has the air-out pipe, the one end of air-out pipe and a lateral wall intercommunication of kiln hood cover.

Furthermore, the driving mechanism comprises two rolling rings symmetrically fixed on the surface of the cylinder body, a driving motor and two groups of carrier rollers are arranged above the bottom plate, a second gear is fixed at the output end of the driving motor, the first gear is meshed with the second gear, and the two groups of carrier rollers are respectively in close contact with the surfaces of the corresponding rolling rings.

Further, dust removal mechanism includes four springs of fixing at the dust removal incasement through the extension board, four the bottom of spring is fixed with the slide, slide sliding connection is in the dust removal incasement, and the bottom equidistance that drives the slide is fixed with the sack, the opening has been seted up to the bottom equidistance of slide, the dust removal case openly is fixed with the motor, the back inner wall of dust removal case rotates through the bearing and is connected with the bull stick, the other end of bull stick passes through the bearing and rotates the front inner wall of connecting at the dust removal case, the one end of bull stick pass the dust removal case openly and with the output shaft fixed connection of motor, the both ends of bull stick are all overlapped and are established and are fixed with two cams, the surface of cam all with the top in close contact with of slide.

Furthermore, the bottom of the dust removal box is communicated with a dust exhaust pipe, and a valve is fixedly mounted on the surface of the dust exhaust pipe.

Further, desulfurization mechanism is including fixing the desulfurization case at the bottom plate top, the top installation intercommunication of dust removal case has the smoke pipe of sending, send the one end of smoke pipe and a lateral wall intercommunication of desulfurization case, the desulfurization incasement is fixed with the coiled pipe, the surface equidistance installation intercommunication of coiled pipe has atomizer, the one end of coiled pipe pass the front of desulfurization case and communicate with the play water end of water pump, the desulfurization incasement is fixed with two filter plates, and a lateral wall installation intercommunication of desulfurization case has the outlet flue.

Furthermore, the smoke delivery pipe is positioned below the coiled pipe, the spraying direction of the atomizing nozzle is downward, and the two filter plates are positioned above the coiled pipe and below the smoke outlet.

Furthermore, the back equidistance installation intercommunication of desulfurization case has the blow off pipe, the bottom of desulfurization case is decurrent slope form toward the blow off pipe direction.

(III) advantageous effects

Compared with the prior art, the invention provides a drying kiln inner desulphurization device for smelting ferronickel by using the RKEF method, which has the following beneficial effects:

according to the invention, through arranging the smoke outlet pipe, the dust removal box and the dust removal mechanism, dust contained in smoke can be filtered and accumulated in the dust removal box, through arranging the dust exhaust pipe and the valve, workers can collect and secondarily treat the dust so as to prevent metal elements still existing in the dust from being wasted, and through arranging the water tank, the water pump and the desulfurization mechanism, the gas subjected to dust removal can be desulfurized and filtered again, and then is conveyed into a chimney to be discharged, so that the load of subsequent purification is reduced, meanwhile, the purification effect can be obviously improved, and the discharge index is qualitatively improved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the kiln head cover of the present invention;

FIG. 3 is a schematic view of the structure inside the dust removing box of the present invention;

FIG. 4 is a schematic view of the structure inside the desulfurization tank of the present invention.

In the figure: 1. a base plate; 2. a barrel; 3. a kiln head cover; 4. a kiln tail cover; 5. a first gear; 6. a drive mechanism; 601. rolling a ring; 602. a drive motor; 603. a carrier roller; 604. a second gear; 7. discharging the smoke tube; 8. a dust removal box; 9. a dust removal mechanism; 901. a spring; 902. a slide plate; 903. a cloth bag; 904. a port; 905. a motor; 906. a rotating rod; 907. a cam; 10. a water tank; 11. a water pump; 12. a desulfurization mechanism; 1201. a desulfurization box; 1202. a smoke delivery pipe; 1203. a serpentine tube; 1204. an atomizing spray head; 1205. filtering the plate; 1206. a smoke outlet; 1207. a blow-off pipe; 13. a feeding hopper; 14. a discharge hopper; 15. a burner; 16. an oil tank; 17. an oil pump; 18. a combustion fan; 19. an air outlet pipe; 20. a dust exhaust pipe; 21. and (4) a valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1 and 2, a desulfurization device in a drying kiln for smelting ferronickel by using the RKEF method according to an embodiment of the present invention includes a bottom plate 1, a cylinder 2 is disposed above the bottom plate 1, a kiln head cover 3 and a kiln tail cover 4 are rotatably connected to both ends of the cylinder 2 through bearings, the surfaces of the kiln head cover 3 and the kiln tail cover 4 are fixed to the top of the bottom plate 1 through legs, a first gear 5 is fixed to the surface of the cylinder 2 in a sleeved manner, a driving mechanism 6 for driving the first gear 5 to rotate is disposed on the bottom plate 1, a smoke outlet pipe 7 is installed and communicated to the top of the kiln tail cover 4, a dust removal box 8 is disposed on the top of the bottom plate 1, one end of the smoke outlet pipe 7 is communicated to a side wall of the dust removal box 8, a dust removal mechanism 9 is disposed in the dust removal box 8, a water tank 10 and a water pump 11 are respectively fixed to the top of the bottom plate 1, and the bottom of the dust removal box 8 is fixed to the top of the water tank 10 through four legs, the water inlet end of a water pump 11 is communicated with the water outlet end of a water tank 10 through a connecting pipe, a desulfurization mechanism 12 is arranged on a bottom plate 1, a feeding hopper 13 is arranged and communicated on the surface of a kiln head cover 3, a discharging hopper 14 is arranged and communicated on the surface of a kiln tail cover 4, a combustor 15 is fixed on one side wall of the kiln head cover 3, an oil tank 16 and a combustion fan 18 are respectively arranged above the bottom plate 1, the bottoms of the oil tank 16 and the combustion fan 18 are fixed on the top of the bottom plate 1 through a base, an oil pump 17 is fixed on the top of the oil tank 16, the liquid inlet end of the oil pump 17 is communicated with the liquid outlet end of the oil tank 16 through a connecting pipe, the liquid outlet end of the oil pump 17 is communicated with the combustor 15 through a connecting pipe, the air outlet end of the combustion fan 18 is arranged and communicated with an air outlet pipe 19, and one end of the air outlet pipe 19 is communicated with one side wall of the kiln head cover 3; to sum up, the material enters the cylinder 2 from the feeding hopper 13, the burner 15 and the combustion fan 18 provide heat energy to the cylinder 2, the driving mechanism 6 is started to drive the first gear 5 to rotate, so as to drive the cylinder 2 to rotate between the kiln head hood 3 and the kiln tail hood 4, so as to dry the material in the cylinder 2, the combustion fan 18 can also blow the smoke generated in the cylinder 2 towards the kiln tail hood 4, the smoke enters the dust removal box 8 through the smoke outlet pipe 7 to remove dust under the action of the dust removal mechanism 9, the dust contained in the gas is filtered out first, the gas with the dust filtered out is sent into the desulfurization mechanism 12 to be desulfurized and then is filtered again, and then the gas is sent into the chimney to be discharged, thereby reducing the load of subsequent purification, obviously improving the purification effect, improving the discharge index, and the dust in the dust removal box 8 still contains some metal elements, the worker can carry out secondary utilization on the collected dust, so that the waste is reduced, and the dust removing mechanism 9 and the desulfurization mechanism 12 are provided with exhaust fans, which are not described here.

As shown in fig. 1, in some embodiments, the driving mechanism 6 includes two rolling rings 601 symmetrically fixed on the surface of the barrel 2, a driving motor 602 and two sets of carrier rollers 603 are disposed above the bottom plate 1, a second gear 604 is fixed at an output end of the driving motor 602, the first gear 5 is engaged with the second gear 604, the two sets of carrier rollers 603 are respectively in close contact with the surfaces of the corresponding rolling rings 601, the driving motor 602 is started to drive the second gear 604 to rotate, the second gear 604 can drive the first gear 5 to rotate, so as to drive the barrel 2 to rotate, the barrel 2 can drive the two rolling rings 601 to rotate, the rolling rings 601 can drive the carrier rollers on the carrier rollers 603 to rotate correspondingly, so that the carrier rollers 603 and the rolling rings 601 can play a certain supporting role when the barrel 2 rotates.

As shown in fig. 1 and 3, in some embodiments, the dust removing mechanism 9 includes four springs 901 fixed in the dust removing box 8 through a support plate, a sliding plate 902 is fixed at the bottom of the four springs 901, the sliding plate 902 is slidably connected in the dust removing box 8, a cloth bag 903 is fixed at the bottom of the sliding plate 902 at an equal distance, openings 904 are formed at the bottom of the sliding plate 902 at an equal distance, a motor 905 is fixed at the front of the dust removing box 8, a rotating rod 906 is rotatably connected to the inner wall of the back of the dust removing box 8 through a bearing, the other end of the rotating rod 906 is rotatably connected to the inner wall of the front of the dust removing box 8 through a bearing, one end of the rotating rod 906 passes through the front of the dust removing box 8 and is fixedly connected to an output shaft of the motor 905, two cams 907 are fixed at two ends of the rotating rod 906, the surfaces of the cams 907 are both in close contact with the top of the sliding plate 902, the smoke enters the dust removing box 8 through the smoke outlet pipe 7, the smoke enters the cloth bag 903 and then can exit 904, sack 903 can be detained the dust in the flue gas on its surface, starter motor 905 can drive bull stick 906 and rotate, and bull stick 906 can drive two cams 907 and rotate, and cam 907 can drive slide 902 and remove, under the cooperation of spring 901, can make sack 903 shake to can shake the bottom of falling at dust removal case 8 with the dust that is detained on sack 903 surface and pile up, thereby guarantee the dust removal effect.

As shown in fig. 3, in some embodiments, a dust exhaust pipe 20 is installed and communicated with the bottom of the dust removal box 8, and a valve 21 is fixedly installed on the surface of the dust exhaust pipe 20, so that workers can collect dust conveniently.

As shown in fig. 1 and 4, in some embodiments, the desulfurization mechanism 12 includes a desulfurization tank 1201 fixed on the top of the bottom plate 1, a smoke feeding pipe 1202 is installed and communicated on the top of the dust removal tank 8, one end of the smoke feeding pipe 1202 is communicated with one side wall of the desulfurization tank 1201, a serpentine pipe 1203 is fixed in the desulfurization tank 1201, atomizing nozzles 1204 are installed and communicated on the surface of the serpentine pipe 1203 at equal intervals, one end of the serpentine pipe 1203 penetrates through the front surface of the desulfurization tank 1201 and is communicated with the water outlet end of the water pump 11, two filter plates 1205 are fixed in the desulfurization tank 1201, a smoke outlet 1206 is installed and communicated on one side wall of the desulfurization tank 1201, the water pump 11 can pump the desulfurization solution stored in the water tank 10 into the serpentine pipe 1203, so that the atomizing nozzles 1204 can spray the desulfurization solution to the flue gas, so that sulfur dioxide in the flue gas reacts with the desulfurization solution, substances generated after the reaction fall into the bottom of the desulfurization tank 1201 to be gathered, and the desulfurized gas passes through the filter plates 1205 again, so as to filter and adsorb moisture or fine particles in the gas, and the gas passing through the filter plate 1205 is discharged out of the desulfurization box 1201 through the smoke outlet 1206.

As shown in fig. 1 and 4, in some embodiments, the smoke delivery pipe 1202 is located below the serpentine pipe 1203, the spraying direction of the atomizer 1204 is downward, the two filter plates 1205 are located above the serpentine pipe 1203 and below the smoke outlet 1206, so as to facilitate the smoke and the desulfurization solution to flow and mix in a reverse direction, and after sufficient reaction, the smoke is filtered and adsorbed.

As shown in fig. 4, in some embodiments, the back surface of the desulfurization tank 1201 is provided with a drain pipe 1207 at an equal distance, and the bottom of the desulfurization tank 1201 is inclined downward toward the drain pipe 1207, so as to facilitate discharging the solid-liquid mixture collected at the bottom of the desulfurization tank 1201 into the desulfurization tank 1201.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an utilize interior desulphurization unit of dry kiln of RKEF method smelting ferronickel, includes bottom plate (1), its characterized in that: the kiln hood is characterized in that a cylinder body (2) is arranged above the bottom plate (1), the two ends of the cylinder body (2) are respectively communicated with a kiln hood cover (3) and a kiln tail cover (4) through a bearing in a rotating mode, the surfaces of the kiln hood cover (3) and the kiln tail cover (4) are respectively fixed at the top of the bottom plate (1) through supporting legs, a first gear (5) is fixedly arranged on the surface of the cylinder body (2), a driving mechanism (6) used for driving the first gear (5) to rotate is arranged on the bottom plate (1), a smoke outlet pipe (7) is communicated with the top of the kiln tail cover (4), a dust removal box (8) is arranged at the top of the bottom plate (1), one end of the smoke outlet pipe (7) is communicated with one side wall of the dust removal box (8), a dust removal mechanism (9) is arranged in the dust removal box (8), a water tank (10) and a water pump (11) are respectively fixed at the top of the bottom plate (1), the bottom of dust removal case (8) is fixed at the top of water tank (10) through four landing legs, the end of intaking of water pump (11) is through connecting the pipe intercommunication with the play water end of water tank (10), be provided with on bottom plate (1) and be used for desulfurization mechanism (12), the surface mounting intercommunication of kiln hood cover (3) has hopper (13), the surface mounting intercommunication of kiln hood (4) has hopper (14), a lateral wall of kiln hood cover (3) is fixed with combustor (15), the top of bottom plate (1) is provided with oil tank (16) and combustion fan (18) respectively, the top at bottom plate (1) is fixed through the base in the bottom of oil tank (16) and combustion fan (18), the top of oil tank (16) is fixed with oil pump (17), the inlet end of oil pump (17) is through connecting the pipe intercommunication with the play liquid end of oil tank (16), the play liquid end of oil pump (17) is through connecting pipe and combustor (15) intercommunication, an air outlet pipe (19) is arranged and communicated with an air outlet end of the combustion fan (18), and one end of the air outlet pipe (19) is communicated with one side wall of the kiln head cover (3).

2. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 1, characterized in that: the driving mechanism (6) comprises two rolling rings (601) symmetrically fixed on the surface of the barrel body (2), a driving motor (602) and two groups of carrier rollers (603) are arranged above the bottom plate (1), a second gear (604) is fixed at the output end of the driving motor (602), the first gear (5) is meshed with the second gear (604), and the two groups of carrier rollers (603) are respectively in close contact with the surfaces of the corresponding rolling rings (601).

3. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 1, characterized in that: the dust removal mechanism (9) comprises four springs (901) fixed in a dust removal box (8) through support plates, sliding plates (902) are fixed at the bottoms of the four springs (901), the sliding plates (902) are connected in the dust removal box (8) in a sliding mode, cloth bags (903) are fixed at the bottoms of the sliding plates (902) at equal intervals, through holes (904) are formed in the bottoms of the sliding plates (902) at equal intervals, a motor (905) is fixed on the front face of the dust removal box (8), a rotating rod (906) is rotatably connected to the inner wall of the back face of the dust removal box (8) through a bearing, the other end of the rotating rod (906) is rotatably connected to the inner wall of the front face of the dust removal box (8) through the bearing, one end of the rotating rod (906) penetrates through the front face of the dust removal box (8) and is fixedly connected with an output shaft of the motor (905), two cams (907) are fixedly sleeved at two ends of the rotating rod (906), the surfaces of the cams (907) are in close contact with the top of the slide plate (902).

4. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 1, characterized in that: the bottom installation intercommunication of dust removal case (8) has dust exhaust pipe (20), the fixed surface of dust exhaust pipe (20) installs valve (21).

5. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 1, characterized in that: desulfurization mechanism (12) are including fixing desulfurization case (1201) at bottom plate (1) top, the top installation intercommunication of dust removal case (8) has smoke pipe (1202) of sending, send the one end of smoke pipe (1202) and a lateral wall intercommunication of desulfurization case (1201), desulfurization case (1201) internal fixation has coiled pipe (1203), the surface equidistance installation intercommunication of coiled pipe (1203) has atomizer (1204), the one end of coiled pipe (1203) pass the front of desulfurization case (1201) and with the water outlet end intercommunication of water pump (11), desulfurization case (1201) internal fixation has two filter plates (1205), a lateral wall installation intercommunication of desulfurization case (1201) has outlet (1206).

6. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 5, characterized in that: the smoke delivery pipe (1202) is positioned below the coiled pipe (1203), the spraying direction of the atomizing spray head (1204) is downward, and the two filter plates (1205) are positioned above the coiled pipe (1203) and below the smoke outlet (1206).

7. The desulfurization device in a drying kiln for smelting ferronickel by the RKEF method according to claim 5, characterized in that: the back of the desulfurization box (1201) is equidistantly provided with a plurality of sewage pipes (1207) in a communicated manner, and the bottom of the desulfurization box (1201) is inclined downwards towards the sewage pipes (1207).