Ferrous sulfate heptahydrate drying plant
Technical field
The utility model relates to a kind of drying equipment, particularly relates to a kind of ferrous sulfate heptahydrate drying plant.
Background technology
Ferrous sulfate heptahydrate relative density 1.898, fusing point 64 DEG C, changes tetrahydrate at 56.6 DEG C into by seven water synthetics, becomes monohydrate at 64.6 DEG C, loses six crystallizations water 90 DEG C time, loses whole crystallization water and form anhydride 300 DEG C time.Adopt conventional technology and equipment to sulfate process titanium dioxide waste residue ferrous sulfate heptahydrate usually also containing 10 ~ 20% free water dry time; in temperature-rise period; ferrous sulfate heptahydrate can be separated out water and be dissolved; form slurry; material is bondd mutually; thus very easily stick on the inwall of drying plant, the capacity and output of drying production line is reduced, can cause time serious stopping factory.
Applicant once adopted following equipment to dry ferrous sulfate heptahydrate, but all there is serious sticky wall problem.
Expansion drying: 1 can glue wall on refining device top, time serious, top can be made all to block, a diameter is the flash distillation dryer of 1000mm, flash distillation dryer top pipe plug can be become be less than the aperture of 200mm in three days.2 yield poorly, and when inputting increasing, the material above expansion drying main body can be made to gather, and when accumulating to a timing, can fall suddenly, thus blocking whole refinement axle, thus making refining device out of service, and maintenance is very inconvenient.
Pneumatic conveying drying: 1 feed problems, adopts feeding screw, there will be blocking.2 rise problem, in order to make the material of some coarse grain enter airflow line, needing to adopt loudspeaker, due to the characteristic of ferrous sulfate heptahydrate, equally there will be and block loudspeaker.3 yield poorly, and when output strengthens, there will be the symptom that expansion drying is the same.4 pipelines block up, especially elbow, and general drying time about seven days just needs cleaning once.
Fluidized bed drying: 1 dead bed, especially in charging place, because material can bond mutually, thus causes dead bed.2 collophore walls: when thin ferrous sulfate heptahydrate directly by wind or be drawn onto on wall, can separate out moisture because being heated and be bonded on wall.Pipeline can often be plugged.3 yield poorly, and when strengthening output, above-mentioned phenomenon can be more serious.
Roller drying: 4 sticky barrels, can be bonded on barrel, a large cylinder can be made time serious to stick into a little cylinder; Make the lifting blade in cylinder all ineffective, thus drying performance is plunged.5 is agglomerating, owing to can separate out moisture when material is heated, thus material bondd mutually, under the effect of cylinder, and the group of being formed, thus cause oven dry difficulty.
A kind of improve after ferrous sulfate heptahydrate stoving process as follows: mix with the ferrous sulfate heptahydrate containing free water with the material after drying, and then send into after dryer is dried and obtain product; Ferrous sulfate monohydrate after material after described oven dry refers to oven dry or the mixture of ferrous sulfate monohydrate and ferrous sulfate heptahydrate or flyash or pyrite concentrate prepare the scum that sulfuric acid produces.This technique first mixes with the ferrous sulfate heptahydrate containing free water fully by adopting the material after drying, and makes mixed material can not be bonded in the leading portion of feed system and drying system; Dry materials after entering dryer, can make material become surface for white ferrous sulfate monohydrate kernel be the particulate material of seven water ferrous irons substantially, because surface exists one deck ferrous sulfate monohydrate, therefore the phenomenon of sticky wall can not all be there is in drying course afterwards again, baking operation is smooth, realizes long-term continuous seepage.
In order to adapt to above-mentioned ferrous sulfate heptahydrate stoving process, need a kind of ferrous sulfate heptahydrate drying plant.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of ferrous sulfate heptahydrate drying plant being applicable to ferrous sulfate heptahydrate and drying.
In order to solve the problem, the technical scheme adopted is: ferrous sulfate heptahydrate drying plant comprises feeding mechanism, fixing Drying, rotary drier, discharging mechanism, central shaft, rotary drier support driving mechanism and central shaft support driving mechanism;
Feeding mechanism, fixing Drying, rotary drier sets gradually with discharging mechanism and inner space is communicated with; Central shaft runs through feeding mechanism, fixing Drying, rotary drier and discharging mechanism, and axis centerline overlaps with the center line of fixing Drying and rotary drier; Rotary drier support driving mechanism supports rotary drier and rotary drier can be driven to rotate; Central shaft support driving mechanism centre of support axle also can drive central shaft to rotate;
Feeding mechanism is provided with material inlet, and being provided with in feeding mechanism can by mass transport to the feeding unit in fixing Drying, and feeding unit is the helical blade be connected with central shaft;
Fixing Drying is provided with hot wind inlet, and hot wind inlet is inclined upwardly or vertically arranges, and hot wind inlet and horizontal plane angle are 30-90 degree; Be provided with the pusher blade be connected with central shaft in fixing Drying and break up blade; Pusher blade is the plane blade that the axis of relative centre axle is obliquely installed, on the same axial location of central shaft, centered by the axis of central shaft, be symmetrically arranged with two pusher blades and two break up blade;
Rotary furnace drying tube inner surface is connected with lifting blade; The inner surface of rotary drier near fixing Drying one end is connected with deflector, and the relative rotary drier axis of baffle surface tilts;
Discharging mechanism is provided with material outlet and hot-blast outlet, hot-blast outlet is connected with air exhauster.
Further: be positioned at the pusher blade of the same axial positions of central shaft and break up blade and be referred to as vane group, centrally axle is axially provided with at least two group vane group, has 90 degree of angles between adjacent blades group.
Further: centrally axle is axially provided with four groups of vane group.
Further: the pusher blade of same group of vane group is 90 degree with the angle breaing up blade.
Further: rotary drier is connected with reverse push flitch near the inner surface of discharging mechanism end, and reverse push flitch is oppositely arranged relative to deflector; The part that central shaft is positioned at rotary drier is connected with the backgauge dish perpendicular to central shaft near fixing Drying, backgauge dish is provided with air vent.
Further: rotary furnace drying tube outer surface is provided with the sealing silica gel around rotary drier, fixing Drying comprises vertical fixing Drying side plate and the fixing Drying swash plate of 45 degree of tapers, fixing Drying swash plate microcephaly is in the middle part of rotary drier, and sealing silica gel contacts the gap between seal rotary Drying and fixing Drying respectively with rotary drier with fixing Drying side plate, fixing Drying swash plate.
Further: discharging mechanism comprises vertical discharging mechanism side plate and the discharging mechanism swash plate of 45 degree of tapers, discharging mechanism swash plate microcephaly is in the middle part of rotary drier, and sealing silica gel contacts the gap between seal rotary Drying and discharging mechanism respectively with rotary drier with discharging mechanism side plate, discharging mechanism swash plate.
The beneficial effects of the utility model are: test through applicant, ferrous sulfate heptahydrate drying plant of the present utility model is specially adapted to improve post-drying technique described in background technology and namely mixes with the ferrous sulfate heptahydrate containing free water with the material after oven dry, and then sends into the ferrous sulfate heptahydrate baking operation obtaining product after dryer is dried.Ferrous sulfate heptahydrate does not bond with dryer, good drying effect and oven dry amount is large.
Accompanying drawing illustrates:
Fig. 1 is ferrous sulfate heptahydrate drying plant structure chart;
Fig. 2 is that rotary drier supports schematic diagram;
Fig. 3 is hot wind inlet direction schematic diagram;
Be labeled as in figure: hot-blast outlet 1, discharging mechanism side plate 2, sealing silica gel 3, support wheel 4, reverse push flitch 5, driven gear 6, backgauge dish 7, deflector 8, fixing Drying swash plate 9, fixing Drying side plate 10, pusher blade 11, hot wind inlet 12, material inlet 13, feeding unit 14, feeding mechanism 15, fixing Drying 16, break up blade 17, support roller 18, central shaft 19, rotary drier driving machine 20, driving gear 21, rotary drier support driving mechanism 22, rotary drier 23, material outlet 24, central shaft support driving mechanism 25, central shaft driving machine 26, chain-drive mechanism 27, bearing 28, lifting blade 29, discharging mechanism 30, discharging mechanism swash plate 31.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
Ferrous sulfate heptahydrate drying plant comprises feeding mechanism 15, fixing Drying 16, rotary drier 23, discharging mechanism 30, central shaft 19, rotary drier support driving mechanism 22 and central shaft support driving mechanism 25;
Feeding mechanism 15, fixing Drying 16, rotary drier 23 sets gradually with discharging mechanism 30 and inner space is communicated with; Central shaft 19 runs through feeding mechanism 15, fixing Drying 16, rotary drier 23 and discharging mechanism 30, and central shaft 19 center line overlaps with the center line of fixing Drying 16 and rotary drier 23; Rotary drier support driving mechanism 22 supports rotary drier 23 and rotary drier 23 can be driven to rotate; Central shaft support driving mechanism 25 centre of support axle 19 also can drive central shaft 19 to rotate;
Feeding mechanism 15 is provided with material inlet 13, being provided with in feeding mechanism 15 can by mass transport to the feeding unit 14 in fixing Drying 16, and feeding unit 14 can be mounted in the helical blade on central shaft 19;
Fixing Drying 16 is provided with hot wind inlet 12, is provided with the pusher blade 11 be connected with central shaft 19 in fixing Drying 16 and breaks up blade 17; Pusher blade 11 is the plane blade that the axis of relative centre axle 19 is obliquely installed, on the same axial location of central shaft 19, centered by the axis of central shaft 19, be symmetrically arranged with two pusher blades 11 and two break up blade 17;
Rotary drier 23 inner surface is connected with lifting blade 29; Rotary drier 23 is connected with deflector 8 near the inner surface of fixing Drying 16 end, and deflector 8 surface relatively rotary drier 23 axis tilts;
Discharging mechanism 30 is provided with material outlet 24 and hot-blast outlet 1.
The drying course that the utility model dries ferrous sulfate heptahydrate is as follows: ferrous sulfate heptahydrate and material drying mixture (hereinafter referred to as mixed material) enter feeding mechanism 15 from material inlet 13, and mixed material is transported to fixing Drying 16 by feeding mechanism 15 by feeding unit 14.Hot blast enters fixing Drying 16 from hot wind inlet 12, and in fixing Drying 16, hot blast can carry out preliminarily dried to mixed material.As there is caking phenomenon, breaing up blade 17 can break up caking rapidly.Due to pusher blade 11 and the stirring of breaing up blade 17, material wall sticking phenomenon can not be there is.Pusher blade 11 with break up blade 17 and also mixed material kicked up mixed material is fully contacted with hot blast, mixed material surface rapid draing, become surface for white ferrous sulfate monohydrate kernel be the particulate material of seven water ferrous irons substantially, because surface exists one deck ferrous sulfate monohydrate, the phenomenon of sticky wall therefore in process afterwards, all can not be there is again.Pusher blade 11 has propelling movement effect, and simultaneously hot blast also has mixed material is blowed to the effect that rotary drier 23 helps conveying, and under pusher blade 11 and hot wind action, mixed material enters rotary drier 23.In rotary drier 23, hot blast continues dry mixed material, and mixed material is kicked up and bottom mixed material is contacted with hot blast by lifting blade 29 bottom rotary drier 23.Mixed material pushes to discharging mechanism 30 by deflector 8, finally pushes to discharging mechanism 30.Material after oven dry is discharged from material outlet 24, and hot blast is discharged from hot-blast outlet 1.
As previously mentioned, the effect of breaing up blade 17 is broken up by the mixed material of caking.Break up blade 17 and can have multiple concrete structure, wherein one as shown in Figure 1, breaks up blade 17 and comprise horizontal bar and perpendicular muscle.For ease of illustrating, will the pusher blade 11 of the same axial positions of central shaft 19 be positioned at and break up blade 17 and be referred to as vane group.In fixing Drying 16, one group of vane group can be only set.In order to extend the drying time of mixed material in fixing Drying 16, centrally axle 19 axially can be provided with at least two group vane group, has 90 degree of angles between adjacent blades group; Vane group quantity be four groups best.
Under the acting in conjunction of hot blast and deflector 8, mixed material may so that speed is by rotary drier 23 faster, and cause drying time too short, drying is not thorough.In order to extend the time of staying of compound in rotary drier 23, rotary drier 23 can be lengthened, but obviously this can cause weight of equipment and cost to increase.Therefore mode is connected with reverse push flitch 5 at the inner surface of rotary drier 23 near discharging mechanism 30 one end preferably, and reverse push flitch 5 surface relatively rotary drier 23 axis tilts, and incline direction is contrary with deflector 8.The reverse pusher effect of reverse push flitch 5 makes there is a certain amount of dry material all the time in rotary drier 23, as occur in drying course seven water ferrous iron fusing time dry material can wrap up melt seven water ferrous irons and wall sticking phenomenon can not be there is, also extend the time of staying of material in rotary drier 23 simultaneously, ensure the effect of drying, and arrange simple, cost is lower.
The flow velocity that hot blast enters rotary drier 23 from fixing Drying 16 is higher, blowing far at fixing Drying 16 inner drying mixed material that is comparatively thorough or smaller piece, can affect the further drying of material in rotary drier 23.In order to be lowered rapidly by the flow velocity of hot blast, the portion central axes 19 being positioned at the close fixing Drying 16 of rotary drier 23 arranges backgauge dish 7, and backgauge dish 7 is perpendicular to the axis of central shaft 19.Backgauge dish 7 can blow mixed material far away to hot blast to be stopped, increases the time of staying of this part mixed material in rotary drier 23; And the flow velocity of hot blast can be reduced, the length of rotary drier 23 can be reduced, in order to avoid backgauge dish 7 pairs of hot blasts produce excessive resistance, backgauge dish 7 is provided with air vent.
Rotary drier support driving mechanism 22 supports and drives the concrete mode of Drying as illustrated in fig. 1 and 2: rotary drier 23 outer surface is provided with support wheel 4 around rotary drier 23 and driven gear 6; Rotary drier support driving mechanism 22 comprises rotary drier driving machine 20, driving gear 21 and support roller 18; Support roller 18 contacts with support wheel 4 and holds up support wheel 4 from bottom to top, and rotary drier driving machine 20 drives driving gear 21, and driving gear 21 engages with driven gear 6.Rotary drier driving machine 20 can be conventional motor acceleration and deceleration machine or hydraulic pump acceleration and deceleration machine.
Central shaft support driving mechanism 25 supports and drives the concrete mode of central shaft 19 as shown in Figure 1: central shaft support driving mechanism 25 comprises central shaft driving machine 26, chain-drive mechanism 27 and is connected to the bearing 28 at central shaft 19 two ends, and central shaft driving machine 26 is connected with central shaft 19 by chain-drive mechanism 27.Central shaft driving machine 26 also can be conventional motor acceleration and deceleration machine or hydraulic pump acceleration and deceleration machine.
In order to accelerate hot wind flow, improving drying effect, air exhauster can be connected on hot-blast outlet 1.
Rotary drier 23 rotate and fixing Drying 16 and discharging mechanism 30 static, enter rotary drier 23 in order to avoid cold wind and mixed material spills, obvious rotary drier 23 and between fixing Drying 16 and discharging mechanism 30, should rotating seal be set.The concrete set-up mode of the utility model rotating seal is as follows: rotary drier 23 outer surface is provided with the sealing silica gel 3 around rotary drier 23, fixing Drying 16 comprises vertical fixing Drying side plate 10 and the fixing Drying swash plate 9 of 45 degree of tapers, fixing Drying swash plate 9 microcephaly is in the middle part of rotary drier 23, and sealing silica gel 3 contacts the gap between seal rotary Drying 23 and fixing Drying 16 respectively with rotary drier 23 with fixing Drying side plate 10, fixing Drying swash plate 9.Discharging mechanism 30 comprises vertical discharging mechanism side plate 2 and the discharging mechanism swash plate 31 of 45 degree of tapers, discharging mechanism swash plate 31 microcephaly is in the middle part of rotary drier 23, and sealing silica gel 3 contacts the gap between seal rotary Drying 23 and discharging mechanism 30 with discharging mechanism side plate 2, discharging mechanism swash plate 31 and rotary drier 23 respectively.After hot-blast outlet 1 is connected with air exhauster, rotary drier 23 internal gas pressure is less than atmospheric pressure, sealing silica gel 3 may be inhaled in the gap of discharging mechanism side plate 2 and fixing Drying side plate 10 and rotary drier 23, sealing silica gel 3 is damaged, arranging fixing Drying swash plate 9 and discharging mechanism swash plate 31 can avoid sealing silica gel 3 to be inhaled into, and improves sealing silica gel 3 life-span.
Further, as shown in Figure 3, hot wind inlet 12 is inclined upwardly or vertically arranges, and hot wind inlet 12 and horizontal plane angle are 30-90 degree.Hot wind inlet 12 obviously can not be arranged downwards, otherwise material can enter blower fan.If hot wind inlet 12 is horizontal direction layout, central shaft 19 rotarily drives pusher blade 11 and breaks up blade 17 and rotates, and the compound kicked up can be deposited in hot wind inlet 12, causes hot wind inlet 12 to block, hot blast rate is reduced, thus affects drying effect and oven dry amount.After making the downward-sloping or vertical air intake of hot blast, compound cannot be deposited in hot wind inlet 12, and the ferrous dryer continuous and stables of seven water are run.