CN217058331U - Kiln tail feeding dust removal device of reverse-flow air inlet manganese dioxide reduction rotary kiln - Google Patents

Abstract

The utility model discloses a reverse-flow air inlet manganese dioxide reduction rotary kiln tail feeding dust removal device, the same with current structure is: the kiln tail feeding device comprises a feeding chamber connected with a kiln tail, wherein an ash bucket is arranged at the upper end of the feeding chamber, a cloth bag dust removal box body positioned above the feeding chamber is arranged above the ash bucket, a ventilation channel positioned in the feeding chamber is arranged at the lower end of the ash bucket, a discharging chute connected with the kiln tail is arranged below the ventilation channel, and a bucket elevator is arranged on one side of the feeding chamber; the difference is that: be equipped with between ash bucket and the sack dust removal box and all subside the cavity rather than communicating, it is equipped with its inside communicating baffling wind channel to subside along its both sides in the cavity, just the baffling wind channel communicates with each other with ventilation channel, evenly be equipped with the baffling board that is used for the wind-guiding in the baffling wind channel, the baffling wind channel is connected with the kiln tail through the flue of vertical connection above that, the flue passes through the feed opening and is connected with bucket elevator.

Description

Kiln tail feeding dust removal device of reverse-flow air inlet manganese dioxide reduction rotary kiln

Technical Field

The utility model relates to a feeding dust collector of rotary kiln, concretely relates to manganese dioxide reduction rotary kiln tail feeding dust collector admits air against current.

Background

In the field of manganese metallurgy, MnO in manganese ore is required for preparing electrolytic manganese ₂ Reduction by roasting to MnO containing MnO ₂ The manganese ore and the anthracite powder are mixed according to the proportion of 7.5:1, and then enter a drying section (250-350 ℃) and a preheating section (650-700 ℃) of a reduction rotary kiln, and finally enter a reduction section (750-800 ℃) for reduction reaction.

The patent numbers are: 2021228378740 discloses a manganese dioxide reduction device based on it admits air to flow against current, and this reduction device's kiln tail feeding dust collector structure is as shown in fig. 3, include the feed space of being connected with the kiln tail, the upper end of feed space is equipped with the ash bucket, the top of ash bucket is located the sack dust removal box body of feed space top, the lower extreme of ash bucket is equipped with the ventilation passageway that is located the feed space, ventilation passageway passes through the flue and is connected with the kiln tail, lower extreme one side of ventilation passageway is equipped with extends the outer feed opening of feed space, the top of feed opening is connected with the bucket elevator that is located feed space one side, just ventilation passageway's below is equipped with the unloading chute of being connected with the kiln tail. Although this feeding dust collector has set up in the unloading chute will follow the material that tail gas was collected and gets off and get into the reduction rotary kiln again, has improved the utilization ratio of material greatly, still has following defect: firstly, high-temperature tail gas coming out of the kiln tail of the reduction rotary kiln directly enters a bag-type dust removal box body from a flue through an air channel, dust is directly removed without sedimentation, large-particle materials mixed in the tail gas directly follow the tail gas to be discharged due to the fact that the large-particle materials do not fall into a discharging chute without sedimentation, the utilization rate of the materials is reduced, and meanwhile, the impurity removal of the tail gas is also increased; secondly, because the temperature of the reduction section of the reduction rotary kiln is as high as 750-800 ℃, the tail gas coming out of the kiln tail is likely to be mixed with sparks, the high-temperature tail gas does not settle and directly enters the cloth bag dust removal box body, and the sparks mixed in the tail gas are not removed in time, so that the potential safety hazard exists in the feeding dust removal device; in addition, high temperature tail gas directly gets into sack dust removal box from the ventilation passageway above the feed opening, and the material gets into the feed chute below that drops again from the feed opening of ventilation passageway lower extreme in, high temperature tail gas does not have the heat transfer of carrying out with material mutual contact, does not utilize the heat of high temperature tail gas on the one hand, and heat utilization rate is low, and on the other hand material does not preheat before getting into the reduction rotary kiln, and then increases material heating time.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a reverse-flow air inlet manganese dioxide reduction rotary kiln tail feeding dust removal device, the feeding dust removal device is provided with a sedimentation cavity with a deflection air duct between an ash bucket and a cloth bag dust removal box body, meanwhile, a material feeding hole is changed from the lower end of the ash bucket to the upper part of the ash bucket, on one hand, tail gas can effectively return the flow direction in the sedimentation cavity, the large-particle materials mixed with the tail gas are ensured to be settled and enter a discharging chute, the material utilization rate is greatly improved, sparks are also effectively removed in the return flow direction of the tail gas, and the safety performance of the device is greatly improved; on the other hand, the material is discharged from the deflection air duct, and can be in full contact heat exchange with the tail gas in the return flow direction, so that the utilization rate of heat is greatly improved, meanwhile, the material is heated in a heat exchange manner, the energy consumption of manganese dioxide reduction is effectively reduced, and energy conservation and emission reduction are realized.

In order to achieve the purpose, the utility model discloses the technical scheme who takes:

the kiln tail feeding dust removal device of the countercurrent gas inlet manganese dioxide reduction rotary kiln is the same as the existing structure in that: the kiln tail feeding device comprises a feeding chamber connected with a kiln tail, wherein an ash bucket is arranged at the upper end of the feeding chamber, a cloth bag dust removal box body positioned above the feeding chamber is arranged above the ash bucket, a ventilation channel positioned in the feeding chamber is arranged at the lower end of the ash bucket, a discharging chute connected with the kiln tail is arranged below the ventilation channel, and a bucket elevator is arranged on one side of the feeding chamber; the difference is that: the dust collecting device is characterized in that a settling cavity communicated with the dust hopper and the cloth bag dust collecting box body is arranged between the dust hopper and the cloth bag dust collecting box body, a baffling air channel communicated with the inner portion of the settling cavity is arranged on two sides of the settling cavity, the baffling air channel is communicated with the ventilation channel, baffle plates used for guiding air are uniformly arranged in the baffling air channel, the baffling air channel is connected with the kiln tail through a flue vertically connected to the baffling air channel, and the flue is connected with a bucket elevator through a discharging port.

As the preferred technical scheme, in order to ensure that all large particles mixed in the tail gas are settled as far as possible and all sparks are effectively removed, the manufacturing cost of the settling cavity is effectively controlled, and meanwhile, the tail gas and the material are ensured to be fully contacted for heat exchange, and the height of the settling cavity is 6 m.

Compared with the prior art, the utility model discloses the beneficial effect who has:

1. according to the feeding dust removal device, the sedimentation cavity with the deflection air channel is arranged between the ash bucket and the cloth bag dust removal box body, and meanwhile, the material feeding port is changed from the original position at the lower end of the ash bucket to the position above the ash bucket, so that on one hand, tail gas can effectively return to the flow direction in the sedimentation cavity, large granular materials mixed with the tail gas are guaranteed to settle and enter the discharging chute, the material utilization rate is greatly improved, sparks are effectively removed in the return flow direction of the tail gas, and the safety performance of the device is greatly improved; on the other hand, the materials are discharged from the baffling air duct and can be in full contact heat exchange with tail gas flowing in the back-turning flow direction, so that the utilization rate of heat is greatly improved, meanwhile, the heat exchange and temperature rise of the materials are realized, the energy consumption of manganese dioxide reduction is effectively reduced, and the energy conservation and emission reduction are realized.

2. The height setting scientific and reasonable of subsiding the cavity guarantees that mix with all large granules in the tail gas and subsides as far as possible, all mars are effectively got rid of, and effective control subsides the cost of manufacture of cavity, ensures that tail gas and material carry out abundant contact heat transfer simultaneously.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic structural diagram of a conventional dust removing device for feeding materials;

reference numerals: 1. the device comprises a feeding chamber, 2, an ash hopper, 3, a cloth bag dust removal box body, 4, a ventilation channel, 5, a discharging chute, 6, a bucket elevator, 7, a settling cavity, 8, a baffling air channel, 9, a baffle plate, 10, a discharging opening, 11 and a flue.

Detailed Description

As shown in fig. 1, a specific embodiment of the present invention is a feeding and dust removing device for a kiln tail of a reverse-flow intake manganese dioxide reduction rotary kiln, which has the same structure as the existing one: the kiln tail-connected dust removal device comprises a feeding chamber 1 connected with a kiln tail, wherein an ash bucket 2 is arranged at the upper end of the feeding chamber 1, a cloth bag dust removal box body 3 positioned above the feeding chamber 1 is arranged above the ash bucket 2, a ventilation channel 4 positioned in the feeding chamber 1 is arranged at the lower end of the ash bucket 1, a discharging chute 5 connected with the kiln tail is arranged below the ventilation channel 4, and a bucket elevator 6 is arranged on one side of the feeding chamber 1; the difference is that: a settling cavity 7 communicated with the ash bucket 1 is arranged between the ash bucket 1 and the cloth bag dust removing box body 3, the settling cavity 7 is arranged after the bottom of the cloth bag dust removing box body 3 is protectively removed, a baffling air duct 8 communicated with the interior of the settling cavity 7 is arranged along two sides of the settling cavity 7, the baffling air duct 8 is communicated with the ventilation channel 4, baffling plates 9 for guiding air are uniformly arranged in the baffling air duct 8, the baffling air duct 8 is connected with the kiln tail through a flue 11 vertically connected with the baffling air duct 8, the flue 11 is connected with a bucket elevator 6 through a discharge port 10, as shown in figure 2, high-temperature tail gas enters the baffling air duct 8 through the flue 11, the tail gas turns back to two sides after reaching the upper end, then flows out of the baffling air duct 8 along the direction of the baffling plates 9 towards two sides, and finally flows upwards along two sides of the settling cavity 7 into the cloth bag dust removing box body 3, the direction of airflow is shown by arrows in fig. 1 and fig. 2, then the materials enter the sedimentation cavity 7 from the feed opening 10 through the bucket elevator 6, and during the period, the materials and the high-temperature tail gas are fully contacted and heat-exchanged, then fall into the feed chute 5 from the ventilation channel 4, and finally enter the reduction rotary kiln for reduction.

Subside cavity 7 highly be 6m, 6m high subsides cavity 7, guarantees that tail gas can effectively turn back the flow direction in baffling wind channel 8, has also guaranteed simultaneously that tail gas and material carry out abundant contact heat transfer, guarantees to mix with all large granules in the tail gas and subsides as far as possible, all mars are effectively got rid of, and effective control subsides the cost of manufacture of cavity 7, ensures simultaneously that tail gas and material carry out abundant contact heat transfer.

The utility model discloses during the use: the material gets into from feed opening 10 through bucket elevator 6 and subsides in the cavity 7, fall along baffling wind channel 8, and get into flue 11 from the kiln tail after carrying out the heat transfer to manganese dioxide and reduction in the reduction rotary kiln, then upwards walk along subsiding both sides in the cavity 7 in getting into baffling wind channel 8, make material and tail gas fully contact, not only realize that the material preheats earlier, it subsides to mix with the large granule material in the tail gas still to realize, extinguish mars, heat utilization rate has been improved greatly, the material after preheating drops and enters the reduction rotary kiln behind unloading chute 5 and reduces, tail gas through subsiding gets into not removing dust in the dust bag box 3 and removes dust, the material of collecting down directly drops and gets into the reduction rotary kiln in unloading chute 5, the tail gas up to standard after the dust removal discharges.

Of course, the above detailed description is only made for the preferred embodiments of the present invention with reference to the accompanying drawings, and the scope of the present invention is not limited thereto, and all the equivalent changes made by the principle, structure and structure according to the present invention should be covered by the protection scope of the present invention.

Claims (2)

1. The kiln tail feeding and dust removing device of the reverse-flow air inlet manganese dioxide reduction rotary kiln comprises a feeding chamber (1) connected with the kiln tail, wherein an ash bucket (2) is arranged at the upper end of the feeding chamber (1), a cloth bag dust removing box body (3) positioned above the feeding chamber (1) is arranged above the ash bucket (2), a ventilation channel (4) positioned in the feeding chamber (1) is arranged at the lower end of the ash bucket (2), a discharging chute (5) connected with the kiln tail is arranged below the ventilation channel (4), and a bucket elevator (6) is arranged on one side of the feeding chamber (1); the method is characterized in that: be equipped with between ash bucket (2) and sack dust removal box (3) and all subside cavity (7) rather than communicating, subside in cavity (7) and be equipped with its inside communicating baffling wind channel (8) along its both sides, just baffling wind channel (8) communicate with each other with ventilation channel (4), evenly be equipped with baffling board (9) that are used for the wind-guiding in baffling wind channel (8), baffling wind channel (8) are connected with the kiln tail through flue (11) of vertical connection above that, flue (11) are connected with bucket elevator (6) through feed opening (10).

2. The kiln tail feeding dust removal device for the countercurrent feeding manganese dioxide reduction rotary kiln according to claim 1, which is characterized in that: the height of the sedimentation cavity (7) is 6 m.

Images