CN211971783U - Down-flow type high-sulfur bauxite desulfurization roasting device - Google Patents
Down-flow type high-sulfur bauxite desulfurization roasting device Download PDFInfo
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- CN211971783U CN211971783U CN202020344973.8U CN202020344973U CN211971783U CN 211971783 U CN211971783 U CN 211971783U CN 202020344973 U CN202020344973 U CN 202020344973U CN 211971783 U CN211971783 U CN 211971783U
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Abstract
The utility model discloses a following current formula high sulfur bauxite desulfurization calcination device, it constitutes including raw bauxite feed system, venturi feeding system, desulfurization calcination dust collecting system, whirlwind cooling system, cooling dust collecting system, primary fuel supply system and secondary fuel supply system. The utility model has the advantages of simple structure and reasonable design, the mode that adopts flue gas and material following current in the desulfurization calcination interval has prolonged the contact time of material at the interval within range material of suitable reaction temperature and high temperature flue gas, has guaranteed the dynamic characteristic of high sulphur bauxite desulfurization reaction, has that the desulfurization is effectual, low in production cost, product quality is stable, characteristics that production efficiency is high.
Description
Technical Field
The utility model relates to a desulfurization treatment device of high sulphur bauxite, especially a high sulphur bauxite desulfurization roasting equipment of following current formula belongs to nonferrous metallurgy technical field.
Background
Bauxite with a sulfur content greater than 0.7% is called high-sulfur bauxite, and sulfur can cause the following hazards to the alumina production by the bayer process: 1. the sulfur content is too high, a part of alkali is consumed in the dissolution process, and the dissolution rate of alumina by the Bayer process is reduced; 2. the sulfur dissolved in the sodium aluminate solution in the form of sulfide ions, hydroxyl sulfide ions, complexes and the like can accelerate the corrosion speed of equipment. Sodium thiosulfate oxidizes metallic iron and the oxidation product reacts with sodium thiosulfate to form soluble sodium hydroxythiosulfate (Na)2[FeS2(OH)]2H2O) makes the red mud separation and sedimentation work not smoothly carried out; 3. salting-out is generated too early, so that the heating pipes and the discharging system of the evaporator set are scarred, and the harm such as evaporation capacity is reduced; 4. when the content of sodium sulfate exceeds 5g/l, the decomposition speed and the decomposition rate of the sodium aluminate solution are reduced; 5. ferrous sulfide (FeS) hydrosol is dispersed in the solution, and can permeate through the filter medium to enter an aluminum hydroxide filter cake, which affects the quality of the product aluminum oxide and increases the iron content of the aluminum oxide. Therefore, high sulfur bauxite must be desulfurized before it can be used in alumina production. At present, no industrial production device for effectively reducing the sulfur content in the bauxite exists in China aiming at the high-sulfur bauxite.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a down-flow high-sulfur bauxite desulfurization roasting device is provided for reduce sulphur content in the bauxite, thereby overcome above-mentioned prior art not enough.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a concurrent high-sulfur bauxite desulfurization roasting device comprises a raw bauxite feeding system, a Venturi feeding system, a desulfurization roasting dust collecting system, a cyclone cooling system, a cooling dust collecting system, a primary fuel supply system and a secondary fuel supply system; the raw bauxite feeding system comprises a raw material feeding bin, a rotor weighing feeder, a belt feeder and a screw feeder; the Venturi feeding system comprises a Venturi dryer and a primary cyclone separator; the desulfurization roasting system comprises a primary suspension roasting furnace, a secondary cyclone separator, a secondary suspension roasting furnace, a tertiary cyclone separator and a quaternary cyclone separator; the desulfurization roasting dust collecting system comprises an electric dust collector, an induced draft fan air door, an induced draft fan, an ash discharge feeder I, an ash discharge feeder II and an air-operated launder; the cyclone cooling system comprises a first-stage cyclone cooler, a second-stage cyclone cooler, a third-stage cyclone cooler and a fourth-stage cyclone cooler; the cooling dust collecting system comprises a cooling dust collecting electric dust remover, a cooling dust collecting draught fan air door, a cooling dust collecting draught fan, a cooling dust collecting and ash discharging feeder I, a cooling dust collecting and ash discharging feeder II and a cooling dust collecting pneumatic launder; the primary fuel supply system comprises a primary hot air generator and a primary combustion station; the secondary fuel supply system comprises a secondary hot air generator and a secondary combustion station.
In the direct-flow high-sulfur bauxite desulfurizing and roasting device, the rotor weighing feeder is arranged at the lower end of the raw material feeding bin, the belt feeder is positioned below the rotor weighing feeder, the belt feeder is connected with the feeding port of the screw feeder, and the discharge port of the screw feeder is connected with the feeding port of the venturi dryer; the feed inlet of the Venturi dryer is connected with the screw feeder, and the discharge outlet of the Venturi dryer is connected with the primary cyclone separator through a flue; the first-stage suspension roasting furnace and the second-stage cyclone separator, and the second-stage suspension roasting furnace, the third-stage cyclone separator and the fourth-stage cyclone separator are connected through flues, and the second-stage cyclone separator and the second-stage suspension roasting furnace are connected through U-shaped flues; the air inlet at the bottom end of the primary suspension roasting furnace is connected with the primary cyclone separator through a U-shaped flue.
In the forward flow type high-sulfur bauxite desulfurizing and roasting device, the electric dust collector is connected with the four-stage cyclone separator through the flue, the induced draft fan is connected with the electric dust collector through the flue, the outlet of the induced draft fan is connected to the chimney, and the air door of the induced draft fan is arranged on the flue connecting the induced draft fan and the electric dust collector; the bottom discharge port of the electric dust collector is connected with a first ash discharging feeder and a second ash discharging feeder through pipelines, the discharge ports of the first ash discharging feeder and the second ash discharging feeder are connected with a pneumatic chute, and the outlet of the pneumatic chute is connected with a finished bauxite conveying system.
The forward flow type high-sulfur bauxite desulfurizing and roasting device is characterized in that the first-stage cyclone cooler, the second-stage cyclone cooler, the third-stage cyclone cooler and the fourth-stage cyclone cooler are connected through flues and pipelines, and an air outlet of the second-stage cyclone cooler is connected with an air inlet of the first-stage cyclone cooler through a U-shaped flue; the third-stage cyclone separator is connected with a flue entering the first-stage cyclone cooler through a pipeline; an air outlet of the first-stage cyclone cooler is connected with an air inlet of the cooling dust-collecting electric dust remover through a flue, and a discharge hole of the fourth-stage cyclone cooler is connected with a finished bauxite conveying system; the cooling and dust-collecting induced draft fan is connected with the cooling and dust-collecting electric dust remover through a flue, the outlet of the cooling and dust-collecting induced draft fan is connected with a raw material grinding system of high-sulfur bauxite through the flue, and is connected with a primary fuel supply system and a secondary fuel supply system through the flue; the air door of the cooling dust-collecting induced draft fan is arranged on a flue which is connected with the cooling dust-collecting induced draft fan and the cooling dust-collecting electric dust remover; a discharge port at the bottom of the cooling dust-collecting electric dust remover is connected with a first cooling dust-collecting and dust-discharging feeder and a second cooling dust-collecting and dust-discharging feeder through pipelines, discharge ports of the first cooling dust-collecting and dust-discharging feeder and the second cooling dust-collecting and dust-discharging feeder are connected with a cooling dust-collecting pneumatic chute, and an outlet of the cooling dust-collecting pneumatic chute is connected with a finished bauxite conveying system;
the forward flow type high-sulfur bauxite desulfurizing and roasting device is characterized in that the primary hot air generator is connected with the primary combustion station through the flue; the primary hot air generator is connected with an air suction opening at the lower part of the Venturi dryer through a U-shaped flue, and the primary combustion station is connected to an outlet of a cooling dust collection induced draft fan through a flue; the secondary hot air generator is connected with the secondary combustion station through a flue; the secondary hot air generator is connected with the flue of the primary suspension roaster through a flue, and the secondary combustion station is connected to the outlet of the cooling dust-collecting induced draft fan through the flue.
As a preferred scheme, the pneumatic ash discharge valve is arranged at the bottom of a U-shaped flue for connecting the secondary cyclone separator and the secondary suspension roasting furnace, a U-shaped flue for connecting the primary cyclone separator and the primary suspension roasting furnace and a U-shaped flue for connecting the primary hot air generator and the Venturi dryer.
The utility model has the advantages that: compared with the prior art, the utility model has the characteristics of it is following:
1. the utility model discloses adopt flue gas and material following current's mode at the desulfurization calcination interval, prolonged the contact time of material at the interval within range material of suitable reaction temperature and high temperature flue gas, guaranteed the dynamic characteristic of high sulphur bauxite desulfurization reaction. The bauxite fine powder carried in the high-temperature flue gas entering the desulfurization roasting dust collecting system is clinker, belongs to finished bauxite, can directly enter a finished product material conveying system, and has no return material in the technical process.
2. The utility model discloses get into cooling system after tertiary cyclone and level four cyclone separate the good material of middle school's desulfurization roasting system calcination, cooling system adopts the air as coolant, has reduced sulfur dioxide's partial pressure in the flue gas to reduce the possibility of ferric oxide and sulfur dioxide reaction in the finished product bauxite, guaranteed the desulfurization effect of finished product bauxite.
3. The utility model adopts the secondary heat supply technology, and ensures the desulfurization reaction temperature and the reaction time of the high-sulfur bauxite.
4. The utility model discloses the heat in the finished product material will be retrieved and the combustion-supporting wind that is used for as one, secondary fuel supply system to reduce the use amount of one, secondary fuel supply system's fuel, reduction in production cost.
5. The utility model discloses an degree of automation is high, and the unit output is big, and production efficiency is high.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
Example 1: as shown in the attached figure 1, the concurrent high-sulfur bauxite desulfurizing and roasting device comprises a raw bauxite feeding system, a Venturi feeding system, a desulfurizing and roasting dust collecting system, a cyclone cooling system, a cooling dust collecting system, a primary fuel supply system and a secondary fuel supply system, wherein the raw bauxite feeding system comprises a raw material feeding bin 1, a rotor weighing feeder 2, a belt feeder 3 and a screw feeder 4; rotor batcher 2 sets up the lower extreme at raw material feed bin 1, and belt feeder 3 is located rotor batcher 2's below, and belt feeder 3 connects screw feeder 4's feed inlet, and screw feeder 4's discharge gate is connected the feed inlet of venturi desicator 5.
The venturi feeding system comprises a venturi dryer 5 and a primary cyclone separator 6, a feeding hole of the venturi dryer 5 is connected with the screw feeder 4, and a discharging hole of the venturi dryer 5 is connected with the primary cyclone separator 6 through a flue.
The desulfurization roasting system comprises a primary suspension roasting furnace 7, a secondary cyclone separator 8, a secondary suspension roasting furnace 9, a tertiary cyclone separator 10 and a quaternary cyclone separator 11, wherein the primary suspension roasting furnace 7 is connected with the secondary cyclone separator 8, the secondary suspension roasting furnace 9 is connected with the tertiary cyclone separator 10 and the quaternary cyclone separator 11 through flues, the secondary cyclone separator 8 is connected with the secondary suspension roasting furnace 9 through a U-shaped flue, and a pneumatic ash valve 16 is arranged at the bottom of the U-shaped flue; an air inlet at the bottom end of the primary suspension roasting furnace 7 is connected with the primary cyclone separator 6 through a U-shaped flue, and a pneumatic ash discharge valve 16 is arranged at the bottom of the U-shaped flue.
The desulfurization roasting dust collecting system comprises an electric dust collector 17, an induced draft fan air door 21, an induced draft fan 22, an ash discharging feeder I18, an ash discharging feeder II 19 and an air-driven launder 20, wherein the electric dust collector 17 is connected with a four-stage cyclone separator 11 through a flue, the induced draft fan 22 is connected with the electric dust collector 17 through a flue, an outlet of the induced draft fan 22 is connected to a chimney 34 or a flue gas desulfurization system, and the induced draft fan air door 21 is installed on the flue connecting the induced draft fan 22 and the electric dust collector 17; the bottom discharge port of the electric dust collector 17 is connected with the first ash discharging feeder 18 and the second ash discharging feeder 19 through pipelines, the discharge ports of the first ash discharging feeder 18 and the second ash discharging feeder 19 are connected with the pneumatic chute 20, and the outlet of the pneumatic chute 20 is connected with the finished bauxite conveying system 35.
The cyclone cooling system comprises a primary cyclone cooler 12, a secondary cyclone cooler 13, a tertiary cyclone cooler 14 and a quaternary cyclone cooler 15, wherein the primary cyclone cooler 12, the secondary cyclone cooler 13, the tertiary cyclone cooler 14 and the quaternary cyclone cooler 15 are connected through flues and pipelines, and an air outlet of the secondary cyclone cooler 13 is connected with an air inlet of the primary cyclone cooler 12 through a U-shaped flue; the third-stage cyclone separator 10 is connected with a flue entering the first-stage cyclone cooler 12 through a pipeline; an air outlet of the first-stage cyclone cooler 12 is connected with an air inlet of the cooling dust collection electric dust remover 24 through a flue, and a discharge hole of the fourth-stage cyclone cooler 15 is connected with a finished bauxite conveying system 35.
The cooling dust collecting system comprises a cooling dust collecting electric dust remover 24, a cooling dust collecting induced draft fan air door 28, a cooling dust collecting induced draft fan 29, a cooling dust collecting and discharging feeder 25, a cooling dust collecting and discharging feeder 26 and a cooling dust collecting pneumatic launder 27, wherein the cooling dust collecting electric dust remover 24 is connected with a primary cyclone cooler 12 through a flue, the cooling dust collecting induced draft fan 29 is connected with the cooling dust collecting electric dust remover 24 through a flue, the outlet of the cooling dust collecting induced draft fan 29 is connected with a raw material grinding system of high-sulfur bauxite through a flue, and meanwhile, the cooling dust collecting induced draft fan is connected with a primary fuel supply system and a secondary fuel supply; a cooling dust-collecting induced draft fan air door 28 is arranged on a flue which is connected with a cooling dust-collecting induced draft fan 29 and the cooling dust-collecting electric dust remover 24; a discharge port at the bottom of the cooling dust-collecting electric dust remover 24 is connected with a first cooling dust-collecting and dust-discharging feeder 25 and a second cooling dust-collecting and dust-discharging feeder 26 through pipelines, discharge ports of the first cooling dust-collecting and dust-discharging feeder 25 and the second cooling dust-collecting and dust-discharging feeder 26 are connected with a pneumatic cooling dust-collecting chute 27, and an outlet of the pneumatic cooling dust-collecting chute 27 is connected with a finished bauxite conveying system 35.
The primary fuel supply system comprises a primary hot air generator 30 and a primary combustion station 31, wherein the primary hot air generator 30 is connected with the primary combustion station 31 through a flue; the primary hot air generator 30 is connected with an air suction opening at the lower part of the Venturi dryer 5 through a U-shaped flue, a pneumatic ash discharge valve 16 is installed at the bottom of the U-shaped flue, and the primary combustion station 31 is connected to an outlet of a cooling dust collection induced draft fan 29 through a flue.
The secondary fuel supply system comprises a secondary hot air generator 32 and a secondary combustion station 33, wherein the secondary hot air generator 32 is connected with the secondary combustion station 33 through a flue; the secondary hot air generator 32 is connected with the flue of the primary suspension roaster 7 through a flue, and the secondary combustion station 33 is connected with the outlet of the cooling dust collection induced draft fan 29 through the flue.
The utility model discloses a theory of operation: (1) crushing and grinding the high-sulfur bauxite by a raw material grinding system to obtain high-sulfur bauxite powder with the particle size of less than or equal to 0.8mm, wherein the temperature of the high-sulfur bauxite powder is about 50 ℃, and the water content of the high-sulfur bauxite powder is about 1%. (2) The high-sulfur bauxite powder is transported to a raw material feeding bin 1, is fed into a belt feeder 3 after being weighed and fed by a rotor weighing feeder 2, is conveyed to a screw feeder 4 by the belt feeder 3, and the rotor weighing feeder 2 also plays a role in material sealing. (3) Sending the high-sulfur bauxite powder into a Venturi dryer 5 and an ascending pipe for drying through a screw feeder 4, introducing high-temperature hot air into the bottom of the Venturi dryer 5, wherein the high-temperature hot air comes from a primary fuel supply system, adjusting the fuel quantity of a combustion station system 31, and ensuring that the temperature of a primary cyclone separator 6 is about 300 ℃ and the material temperature is about 250 ℃; the residual water contained in the high-sulfur bauxite powder is evaporated in the Venturi dryer 5 and the ascending pipe, and the solid material of the high-sulfur bauxite powder is heated by high-temperature hot air in the Venturi dryer 5 and the ascending pipe to generate the high-sulfur bauxite solid material. (4) The high-sulfur bauxite solid materials generated in the Venturi dryer 5 and the ascending pipe and the high-temperature hot air are conveyed to a primary cyclone separator 6 through a pipeline for material-air separation, and the high-sulfur bauxite solid materials and the high-temperature flue gas are generated. (5) Conveying the high-sulfur bauxite solid material with the temperature of about 250 ℃ generated by the primary cyclone separator 6 into a primary suspension roasting furnace 7 through a pipeline for suspension roasting, wherein the retention time of the material is 4-7 seconds; the high-temperature flue gas with the temperature of about 300 ℃ generated by the primary cyclone separator 6 passes through a flue and passes through a primary suspension roaster 7The furnace bottom of the primary suspension roasting furnace 7 is introduced into the primary suspension roasting furnace 7, high-temperature hot air is introduced into the bottom of the primary suspension roasting furnace 7, the high-temperature hot air comes from a secondary fuel supply system, fuel is provided by a combustion station system 33 and is combusted, the generated high-temperature hot air is sent into the lower part of a throat of the primary suspension roasting furnace 7 through a hot air generator 32, and the fuel quantity of the combustion station system 33 is adjusted to ensure that the smoke of the primary suspension roasting furnace 7 is between 700 and 750 ℃ and the temperature of the materials is between 550 and 650 ℃; the primary suspension roasting furnace 7 is a cylinder with a lining material, the bottom of the primary suspension roasting furnace is a frustum, the material enters the primary suspension roasting furnace 7 from the position, close to a cone, of the lower part of the straight cylinder section of the primary suspension roasting furnace 7 along the direction parallel to the furnace cone, and due to the effect of a throat opening of a furnace bottom, under the action of high-temperature hot air and high-temperature flue gas, the high-sulfur bauxite solid material is in a suspension flowing state, a fountain bed is formed in the primary suspension roasting furnace 7, so that the material and the hot air are fully mixed, and the high-sulfur bauxite solid material is heated and subjected to oxidation roasting reaction in the primary suspension roasting furnace 7 to generate a primary solid material; the temperature of the oxidizing roasting reaction is 550-650 ℃, and sulfur element in the high-sulfur bauxite solid material is oxidized and roasted to generate SO2Gas, producing a first stage containing SO2The temperature of the flue gas is between 700 and 750 ℃. (6) The first-stage solid material and the first-stage SO-containing solid material generated after the oxidizing roasting reaction of the first-stage suspension roasting furnace 72The flue gas is conveyed to a secondary cyclone separator 8 through a pipeline for material-air separation, and solid materials and high-temperature flue gas are generated. (7) Conveying the solid materials generated by the secondary cyclone separator 8 into a secondary suspension roasting furnace 9 through a pipeline for suspension roasting, wherein the retention time of the materials is 4-7 seconds; introducing high-temperature flue gas generated by the secondary cyclone separator 8 into the secondary suspension roasting furnace 9 from the bottom of the secondary suspension roasting furnace 9 through a flue; the secondary suspension roasting furnace 9 is also a cylinder with a lining material, the bottom of the secondary suspension roasting furnace is a frustum, solid materials are in a suspension flowing state under the action of high-temperature flue gas due to the effect of a throat at the bottom of the furnace, a fountain bed is formed in the secondary suspension roasting furnace 9 again, oxidation roasting reaction is continuously carried out, and secondary solid materials are generated, wherein the temperature of the secondary solid materials is 550-650 ℃; the sulfur element in the second-level solid material is oxidized and roasted to generate SO2Generating secondary SO 2-containing flue gas by using the gas, wherein the temperature of the flue gas of the secondary suspension roasting furnace is not lower than 600-650 ℃; adjusting the flow rate of gas in the furnace system to adjust the desulfurization time of the high-sulfur bauxite to ensure ST、S2-When the desulfurization rate is more than 80 percent, the material enters a cooling and recycling system. (8) And conveying the secondary solid material generated by the secondary suspension roasting furnace 9 and the secondary SO 2-containing flue gas to a tertiary cyclone separator 10 through a pipeline for material-air separation to generate bauxite clinker and sulfur-containing flue gas. (9) Conveying the bauxite clinker generated by the three-stage cyclone separator 10 to a cyclone cooling system through a pipeline to be cooled to below 80 ℃ to obtain a bauxite finished product, and conveying the bauxite finished product to a cooked material bin for storage through a finished bauxite conveying system; conveying dust-containing flue gas generated by the cyclone cooling system to a cooling dust collection system through a flue for dust collection treatment, conveying the collected bauxite clinker to a finished bauxite conveying system through a dust discharge feeder and a pneumatic launder, and conveying the finished bauxite clinker to a cooked bunker for storage through the finished bauxite conveying system; one part of the flue gas is connected to the high-sulfur bauxite raw material grinding system through a flue and is used as a drying heat source for drying materials when the raw material grinding system works, and the other part of the flue gas is connected to the primary fuel supply system and the secondary fuel supply system through the flue and is used as combustion air of the primary fuel supply system and the secondary fuel supply system. (10) And conveying the sulfur-containing flue gas generated by the third-stage cyclone separator 10 to a fourth-stage cyclone separator 11 through a pipeline for material-air separation to generate bauxite clinker and sulfur-containing flue gas. (11) The bauxite clinker produced by the four-stage cyclone separator 11 and the bauxite clinker produced by the three-stage cyclone separator 10 are conveyed to a cyclone cooling system through a pipeline and cooled to be below 80 ℃ to obtain a bauxite finished product, and the bauxite finished product is conveyed to a cooked bin for storage through a finished bauxite conveying system. The cyclone cooling system adopts a four-stage cyclone cooling separator, the cooling is partially in a concurrent flow cooling mode, but is in a countercurrent mode as a whole, the material flow is a first-stage cooling separator, a second-stage cooling separator, a third-stage cooling separator and a first-stage cooling separator, and the cold air flow is a fourth-stage cooling separator, a third-stage cooling separator, a second-stage cooling separator and a first-stage cooling separator. (12) Conveying sulfur-containing flue gas generated by the four-stage cyclone separator 11 to a desulfurization roasting dust collecting system for dust collection treatment through a flue, and conveying the collected bauxite clinker to a finished product through an ash discharge feeder and a pneumatic launderThe bauxite conveying system is used for conveying the finished bauxite into a cooked material bin for storage; the flue gas is introduced to a chimney through an induced draft fan to be directly discharged or introduced to a flue gas desulfurization system through the induced draft fan to be subjected to desulfurization treatment.
The utility model discloses well two sets of dust collecting systems of cooling dust collecting system and desulfurization calcination dust collecting system all adopt the electric dust collector, and level four cyclone 11 and level one cyclone 12 all adopt high-efficient separation technique, guarantee that its separation efficiency is not less than 95%, and the smoke and dust concentration that gets into the dust remover like this is not higher than 30g/m3And when the dust collection efficiency of the electric dust collector is ensured to be 99.9 percent, the dust concentration in the smoke discharged by the electric dust collector is 30mg/m3The material recovered by the electric dust collector is roasted bauxite clinker which is sent to a cooked material bin by a finished bauxite conveying system for storage.
The embodiments of the present invention are not limited to the above embodiments, and various changes made without departing from the spirit and scope of the present invention are within the scope of the present invention.
Claims (6)
1. The utility model provides a following current formula high sulfur bauxite desulfurization roasting device which characterized in that: the system comprises a raw bauxite feeding system, a Venturi feeding system, a desulfurization roasting dust collecting system, a cyclone cooling system, a cooling dust collecting system, a primary fuel supply system and a secondary fuel supply system; the raw bauxite feeding system comprises a raw material feeding bin (1), a rotor weighing feeder (2), a belt feeder (3) and a screw feeder (4); the Venturi feeding system comprises a Venturi dryer (5) and a primary cyclone separator (6); the desulfurization roasting system comprises a primary suspension roasting furnace (7), a secondary cyclone separator (8), a secondary suspension roasting furnace (9), a tertiary cyclone separator (10) and a quaternary cyclone separator (11); the desulfurization roasting dust collecting system comprises an electric dust collector (17), an induced draft fan air door (21), an induced draft fan (22), an ash discharge feeder I (18), an ash discharge feeder II (19) and a pneumatic launder (20); the cyclone cooling system comprises a primary cyclone cooler (12), a secondary cyclone cooler (13), a tertiary cyclone cooler (14) and a quaternary cyclone cooler (15); the cooling dust collecting system comprises a cooling dust collecting electric dust remover (24), a cooling dust collecting induced draft fan air door (28), a cooling dust collecting induced draft fan (29), a cooling dust collecting ash discharging feeder I (25), a cooling dust collecting ash discharging feeder II (26) and a cooling dust collecting pneumatic launder (27); the primary fuel supply system comprises a primary hot air generator (30) and a primary combustion station (31); the secondary fuel supply system comprises a secondary hot air generator (32) and a secondary combustion station (33).
2. The concurrent high-sulfur bauxite desulfurizing and roasting device according to claim 1, characterized in that: the rotor weighing feeder (2) is arranged at the lower end of the raw material feeding bin (1), the belt feeder (3) is positioned below the rotor weighing feeder (2), the belt feeder (3) is connected with a feeding hole of the screw feeder (4), and a discharging hole of the screw feeder (4) is connected with a feeding hole of the Venturi dryer (5); the feed inlet of the Venturi dryer (5) is connected with the screw feeder (4), and the discharge outlet of the Venturi dryer (5) is connected with the primary cyclone separator (6) through a flue; the primary suspension roasting furnace (7) is connected with the secondary cyclone separator (8), the secondary suspension roasting furnace (9) is connected with the tertiary cyclone separator (10) and the quaternary cyclone separator (11) through flues, and the secondary cyclone separator (8) is connected with the secondary suspension roasting furnace (9) through a U-shaped flue; an air inlet at the bottom end of the primary suspension roasting furnace (7) is connected with the primary cyclone separator (6) through a U-shaped flue.
3. The concurrent high-sulfur bauxite desulfurizing and roasting device according to claim 1, characterized in that: the electric dust collector (17) is connected with the four-stage cyclone separator (11) through a flue, the induced draft fan (22) is connected with the electric dust collector (17) through the flue, an outlet of the induced draft fan (22) is connected to the chimney (34), and the induced draft fan air door (21) is installed on the flue which is connected with the induced draft fan (22) and the electric dust collector (17); the bottom discharge port of the electric dust collector (17) is connected with the first ash discharging feeder (18) and the second ash discharging feeder (19) through pipelines, the discharge ports of the first ash discharging feeder (18) and the second ash discharging feeder (19) are connected with the pneumatic chute (20), and the outlet of the pneumatic chute (20) is connected with the finished bauxite conveying system (35).
4. The concurrent high-sulfur bauxite desulfurizing and roasting device according to claim 1, characterized in that: the first-stage cyclone cooler (12), the second-stage cyclone cooler (13), the third-stage cyclone cooler (14) and the fourth-stage cyclone cooler (15) are connected through flues and pipelines, and an air outlet of the second-stage cyclone cooler (13) is connected with an air inlet of the first-stage cyclone cooler (12) through a U-shaped flue; the third-stage cyclone separator (10) is connected with a flue entering the first-stage cyclone cooler (12) through a pipeline; an air outlet of the first-stage cyclone cooler (12) is connected with an air inlet of the cooling dust collection electric dust remover (24) through a flue, and a discharge hole of the fourth-stage cyclone cooler (15) is connected with a finished bauxite conveying system; the cooling dust-collecting induced draft fan (29) is connected with the cooling dust-collecting electric dust remover (24) through a flue, the outlet of the cooling dust-collecting induced draft fan (29) is connected with a raw material grinding system of high-sulfur bauxite through the flue, and is connected with a primary fuel supply system and a secondary fuel supply system through the flue; a cooling dust collection induced draft fan air door (28) is arranged on a flue which is connected with a cooling dust collection induced draft fan (29) and a cooling dust collection electric dust remover (24); a discharge port at the bottom of the cooling dust-collecting electric dust remover (24) is connected with a first cooling dust-collecting and dust-discharging feeder (25) and a second cooling dust-collecting and dust-discharging feeder (26) through pipelines, discharge ports of the first cooling dust-collecting and dust-discharging feeder (25) and the second cooling dust-collecting and dust-discharging feeder (26) are connected with a pneumatic cooling dust-collecting trough (27), and an outlet of the pneumatic cooling dust-collecting trough (27) is connected with a finished bauxite conveying system (35).
5. The concurrent high-sulfur bauxite desulfurizing and roasting device according to claim 1, characterized in that: the primary hot air generator (30) is connected with the primary combustion station (31) through a flue; the primary hot air generator (30) is connected with an air suction opening at the lower part of the Venturi dryer (5) through a U-shaped flue, and the primary combustion station (31) is connected to an outlet of a cooling dust collection induced draft fan (29) through a flue; the secondary hot air generator (32) is connected with the secondary combustion station (33) through a flue; the secondary hot air generator (32) is connected with the flue of the primary suspension roaster (7) through a flue, and the secondary combustion station (33) is connected to the outlet of the cooling dust collection draught fan (29) through a flue.
6. The concurrent high-sulfur bauxite desulfurizing and roasting apparatus as claimed in claim 1 or 4, characterized in that: and a pneumatic ash valve (16) is arranged at the bottom of the U-shaped flue connecting the secondary cyclone separator (8) and the secondary suspension roasting furnace (9), the U-shaped flue connecting the primary cyclone separator (6) and the primary suspension roasting furnace (7), and the U-shaped flue connecting the primary hot air generator (30) and the Venturi dryer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020344973.8U CN211971783U (en) | 2020-03-18 | 2020-03-18 | Down-flow type high-sulfur bauxite desulfurization roasting device |
Applications Claiming Priority (1)
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