Electroplating sludge sintering system
Technical Field
The utility model relates to an electroplating sludge treatment technical field especially relates to an electroplating sludge sintering system.
Background
The electroplating industry produces a large amount of electroplating sludge containing heavy metals such as Cu, Ni and the like, and the components are very complex due to different electroplating production processes. The harm of the electroplating sludge to the environment and the human health has attracted great attention of people and is one of the public hazards acknowledged at home and abroad. The electroplating sludge contains various metal components, the quality of the electroplating sludge is higher than that of metal-rich ore, and the electroplating sludge is a cheap secondary renewable resource.
In order to recover metal resources in the electroplating sludge and realize sludge harmlessness, a sintering and melting process is usually adopted to obtain a high-temperature melt subjected to primary impurity removal, and the high-temperature melt is recovered to finally obtain the matte and the water-quenched slag. In the process of sintering the mixture of the electroplating sludge, the following problems exist: firstly, the sintered materials of the mixture after sintering are different in size, the subsequent melting effect is influenced by the undersize particle size of the sintered materials, the melting process is unstable, the consumed fuel is increased, the content of the extracted and recovered matte and the water-quenched slag is low, and the maximum utilization rate cannot be achieved; secondly, the mixture often can produce the problem of putty in sintering furnace discharge gate department, and the workman needs often clear up the sintering furnace mouth, makes workman's intensity of labour increase, if produce the putty problem then can make the mixture sintering time overlength in the sintering furnace and influence the sintering effect moreover.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an electroplating sludge sintering system sieves the sintering material through after the sintering, makes the sintering material that satisfies the requirement can carry out the melting on next step and smelt and draw matte and water quenching sediment, and the too little sintering material of particle diameter can return and circulate granulation and sintering, makes the melting technology more stable, can draw the content of the matte of retrieving and water quenching sediment more.
In order to achieve the above object, the present invention provides a technical solution for solving the technical problem: electroplating sludge sintering system is including consecutive conveyer of unloading, raw materials compatibility prilling granulator, high temperature sintering device and sintering material screening plant, sintering material screening plant is including screening hopper, sintering fine material storehouse and sintering coarse material storehouse, the fine material of sintering in the screening hopper gets into the fine material storehouse of sintering, the fine material of sintering in the fine material storehouse of sintering is carried the raw materials and is compatible prilling granulator and carry out circulation granulation and sintering, the station is smelted in the melting after the coarse material of sintering in the screening hopper is carried sintering coarse material storehouse.
Further, the sintering material screening plant still includes the breaker and unloads the zip fastener machine, the breaker sets up the top of screening hopper, the below setting of the thin material export of screening hopper the thin feed bin of sintering, one side of the thin feed bin of sintering sets up the sintering coarse aggregate storehouse adjacent with it, set up between the port of the thin feed bin of sintering and sintering coarse aggregate storehouse the zip fastener machine of unloading, the one end of the zip fastener machine of unloading with the coarse material export of screening hopper links to each other.
Further, the lower extreme discharge gate department of sintering fine material storehouse and sintering coarse material storehouse is provided with trip valve I, the below of discharge gate sets up weigher I, the below of weigher I sets up transmission band I.
Furthermore, a negative pressure pipeline is arranged above the fine sintering bin, the coarse sintering bin, the metering scale I and the conveying belt I, and the negative pressure pipeline is connected with the bag type dust collector.
Furthermore, the high-temperature sintering device comprises a sintering furnace, a feeding mechanism and a discharging scraper-trough conveyer, wherein a feeding guide plate is arranged at a furnace opening of the sintering furnace, a discharging hopper is arranged above the feeding guide plate, the feeding mechanism connected with one end of the feeding guide plate is arranged above the discharging hopper so as to realize the opening and closing of the feeding guide plate, and the discharging scraper-trough conveyer is arranged at a discharge opening of the sintering furnace; the raw material compatibility granulating device is connected with a feeding opening of the discharging hopper through a large-inclination-angle conveyor.
Furthermore, the feeding mechanism comprises a motor, a steel wire rope and a pulley block, an output shaft of the motor is connected with the pulley block through the steel wire rope, and a pulley above the feeding guide plate in the pulley block is connected with one end of the feeding guide plate through the steel wire rope.
Furthermore, a pressure difference material level meter is connected between a discharge port of the sintering furnace and the discharging chute, and the pressure difference material level meter is electrically connected with the motor through a PLC.
Further, the raw material compatibility granulating device comprises a sludge bin, a fuel bin, a limestone bin, a scattering machine and a granulator, discharge ports of the sludge bin, the fuel bin and the limestone bin are provided with cut-off valves II, metering scales II are respectively arranged below the sludge bin, the fuel bin and the limestone bin, the metering scales II are connected with the scattering machine through a transmission belt II, a discharge port of the scattering machine is opposite to a feeding port of the granulator, and the granulator is connected with the sintering furnace through a large-inclination-angle conveyor.
Further, conveyer of unloading includes that mud stores up the hole, mud bulk cargo material level and mud ton bag bale breaking position of packing into, the top that mud stored up the hole is provided with bridge crane, bridge crane's grab bucket is in the top in mud storehouse is removed, one side setting in mud storage hole the material level of packing into in mud bulk cargo, the opposite side setting in mud storage hole mud ton bag bale breaking position.
Further, the sludge ton bag unpacking position comprises an unpacking platform and a single-rail cantilever crane arranged on one side of the unpacking platform, and one end of the unpacking platform is provided with a discharging scraper-trough conveyer communicated with the sludge storage pit.
The utility model has the advantages that:
1. the utility model discloses a carry out the granulation after mixing mud, buggy and limestone powder, sinter after the granulation, sieve the sintering material after the sintering, make the sintering material that satisfies the particle diameter requirement can carry out the melting on next step and smelt and draw matte and water quenching sediment, the sintering material that the particle diameter is too little can return and circulate granulation and sintering, and this kind of method makes the melting technology more stable, can draw the content of the matte of retrieving and water quenching sediment more.
2. The unloading and transporting device comprises a sludge bulk loading material level and a sludge ton bag unpacking level which are arranged at two sides of the sludge storage pit, the unloading of bulk and ton bag packed electroplating sludge is met, and the unloaded sludge is transported into a sludge bin through a grab bucket of a bridge crane, so that the unloading and transporting of the sludge are more convenient and faster.
3. The raw material compatibility granulating device mixes the sludge, the coal powder fuel and the limestone powder according to a certain proportion, a certain amount of limestone powder is added to absorb the moisture in the sludge, SO that the moisture of the mixture is reduced, the mixture does not need to be dried, the mixture is put into a scattering machine to be uniformly mixed and then granulated, the mixture is conveyed into a sintering furnace to be sintered after the granulation is finished to obtain a honeycomb-shaped sintered material block, the obtained sintered material is easier to burn through granulation twice, and because a proper amount of limestone powder is added into the coal powder, SO generated during the combustion of the sulfur-containing coal powder can be converted into solid CaSO to be discharged, the desulfurization effect is achieved, and the pollution problem of the mixture in the sintering process is reduced.
4. Wherein the feeding deflector of sintering furnace mouth department in the high temperature sintering device passes through the motor and rotates and twine wire rope, make and pass through the pulley that wire rope links to each other with the feeding deflector and rise or descend, thereby the opening and closing of feeding deflector has been accomplished, pressure difference material level appearance is through the discharge gate of sintering furnace and the material level in the swift current of unloading that atmospheric pressure between the swift current of unloading changes the discharge gate of judging the sintering furnace in good time and the swift current of unloading, after the material level risees a definite value, PLC reduces through the import of control feeding deflector, thereby can reduce the mixed material who gets into in the sintering furnace, make the sintering more abundant, prevent that the discharge gate of sintering furnace from producing the problem of putty.
To sum up, the utility model discloses it is more smooth and easy to make the mud mixture defeated material after the sintering, has prevented the production of putty problem, has reduced the pollution problem of sintering process, sieves the material piece after the sintering moreover, makes the sintering material that satisfies the particle diameter requirement carry out the melting on next step and smelt and draw matte and water quenching sediment, and the sintering material that the particle diameter is too little returns and circulates granulation and sintering, makes the melting technology more stable, can draw the content of the matte of retrieving and water quenching sediment more.
Drawings
The contents of the various figures of the specification and the labels in the figures are briefly described as follows:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the high-temperature sintering apparatus shown in FIG. 1;
the labels in the above figures are: 1. the system comprises a discharge conveying device, 11 sludge storage pits, 12 sludge bulk loading material level, 13 sludge ton bag unpacking positions, 131 unpacking platforms, 132 single-rail cantilever cranes, 133 blanking sliders, 14 bridge cranes, 2 raw material compatibility granulating devices, 21 sludge bins, 22 fuel bins, 23 limestone bins, 24 scattering machines, 25 granulating machines, 26 cutting valves II and 27 metering scales II and 28 conveying belts II and 3 high-temperature sintering devices, 31 sintering furnaces, 32 feeding mechanisms, 321 motors, 322 steel wire ropes, 323 pulley blocks, 33 discharging sliders, 34 feeding guide plates, 35 discharging hoppers, 36 differential pressure material level meters, 4 sintering material screening devices, 41 screening hoppers, 42 sintering fine bins, 43 sintering coarse bins, 44 crushing machines, 45 discharging zipper machines, 46 cutting valves I and 47 metering scales, 48. the conveying belt I comprises a conveying belt I, 49 bag type dust collectors, 5 large-inclination-angle conveyors and 6 cutoff valves.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model discloses specific embodiment does: as shown in figure 1, the electroplating sludge sintering system comprises a discharging and transporting device 1, a raw material compatible granulating device 2, a high-temperature sintering device 3 and a sintering material screening device 4 which are sequentially connected, wherein the sintering material screening device 4 comprises a screening hopper 41, a sintering fine material bin 42 and a sintering coarse material bin 43, a filter screen is arranged in the screening hopper 41, a vibrator is arranged outside the screening hopper 41, a fine material outlet is arranged at the bottom end of the screening hopper 41, a coarse material outlet is arranged at one side of the screening hopper 41, the screening hopper 41 is obliquely arranged, screened coarse materials are convenient to come out from the coarse material outlet, the sintering fine materials of the screening hopper 41 enter the sintering fine material bin 42, the sintering fine materials in the sintering fine material bin 42 are conveyed to the raw material granulating device 2 for circular granulation and sintering, the sintering coarse materials in the screening hopper 41 are conveyed to a melting smelting station after being conveyed to the sintering coarse material bin 43, mixing the coal powder and the limestone powder, granulating, sintering, and screening the sintered material after sintering, so that the sintered material meeting the particle size requirement can be subjected to next melting smelting and extracting matte and water-quenched slag, and the sintered material with the excessively small particle size can be returned to be subjected to circulating granulation and sintering.
Specifically, the sintered material screening device 4 further includes a crusher 44 and a discharge zipper machine 45, the crusher 44 is disposed above the screening hopper 41 and is used for primarily scattering the mixed material blocks conveyed into the screening hopper 41 and preventing the mixed material blocks from being bonded together to affect the classification and screening of the materials, a sintered fine material bin 42 is disposed below a fine material outlet of the screening hopper 41, a sintered coarse material bin 43 adjacent to one side of the sintered fine material bin 42 is disposed at one side of the sintered fine material bin 42, a discharge zipper machine 45 is disposed between ports of the sintered fine material bin 42 and the sintered coarse material bin 43, one end of the discharge zipper machine 45 is connected with a coarse material outlet of the screening hopper 41, and the screened coarse material is conveyed into the sintered coarse material bin 43.
The lower extreme discharge gate department of above-mentioned sintering fine material storehouse 42 and sintering coarse material storehouse 43 is provided with trip valve I46, the below of discharge gate sets up weigher I47, weigher I47 sets up the weigher to the transmission belt formula, the below of weigher I47 sets up transmission belt I48, a station is smelted in the melting for carry, weigher I47 is connected through PLC and I46 electricity of trip valve, when the weight of the mixture piece of weigher I47 measurement reaches required weight, defeated material when PLC control trip valve I46 closes and stops, accurate weighing defeated material has been realized, make the melting technology more stable. In addition, in order to reduce the pollution problem of the mixed material block in the material conveying process, a negative pressure pipeline is arranged above the fine sintering bin 42, the coarse sintering bin 43, the metering scale I47 and the conveying belt I48 and is connected with a bag type dust collector 49, so that the dust generated in the material conveying process is reduced.
Specifically, as shown in fig. 2, the high-temperature sintering apparatus 3 includes a sintering furnace 31, a feeding mechanism 32 and a discharging scraper-trough conveyer 33, a feeding guide plate 34 is disposed at a furnace mouth of the sintering furnace 31, a discharging hopper 35 is disposed above the feeding guide plate 34, the feeding mechanism 32 connected to one end of the feeding guide plate 34 is disposed above the discharging hopper 35 to open and close the feeding guide plate 34, and can be used to adjust an opening degree of the feeding guide plate 34, so as to control an amount of mixed materials in the sintering furnace 31, and the discharging scraper-trough conveyer 33 is disposed at a discharge mouth of the sintering furnace 31 to discharge the sintered material blocks. The raw material compatibility granulating device 2 is connected with a feeding opening of the discharging hopper 35 through a large-inclination-angle conveyor 5 and is used for conveying mixed materials into the discharging hopper 35. The feeding mechanism 32 comprises a motor 321, a steel wire rope 322 and a pulley block 323, an output shaft of the motor 321 is connected with the pulley block 323 through the steel wire rope 322, one pulley in the pulley block 323 above the feeding guide plate 34 is connected with one end of the feeding guide plate 34 through the steel wire rope 322, and the steel wire rope 322 can be extended or shortened through the rotation of the output shaft of the motor 321, so that the pulley above the feeding guide plate 34 can be lifted or lowered, and the opening degree of the feeding guide plate 34 can be adjusted. Be connected with pressure differential charge level appearance 36 between the discharge gate of fritting furnace 31 and the swift current of unloading 33, this pressure differential charge level appearance 36 is current structure, promptly through the discharge gate of fritting furnace 31 and the atmospheric pressure change between the swift current of unloading 33 come in good time to judge the discharge gate of fritting furnace 31 and the material level in the swift current of unloading 33, pressure differential charge level appearance 36 is connected with motor 321 electricity through PLC, after the material level risees to a definite value, PLC makes the import of feeding deflector 34 reduce through the number of turns of the rotation of control motor 321 output shaft and turn to, thereby can reduce the mixed material who gets into in fritting furnace 31, make the sintering more abundant, prevent that the discharge gate of fritting furnace 31 from producing the problem of putty.
Specifically, as shown in fig. 1, the raw material compatibility granulating device 2 includes a sludge bin 21, a fuel bin 22, a limestone bin 23, a scattering machine 24 and a granulator 25, discharge ports of the sludge bin 21, the fuel bin 22 and the limestone bin 23 are all provided with a cut-off valve ii 26, metering scales ii 27 are respectively arranged below the sludge bin 21, the fuel bin 22 and the limestone bin 23, the metering scales ii 27 are connected with the scattering machine 24 through a transmission belt ii 28, a discharge port of the scattering machine 24 is opposite to a feed port of the granulator 25, the granulator 25 is connected with a sintering furnace 31 through a large-inclination-angle conveyor 5, moisture in sludge can be absorbed by adding a certain amount of limestone powder, SO that moisture in the mixture is reduced, the mixture does not need to be dried, the mixture is put into the scattering machine to be uniformly mixed and then granulated, the granulated mixture is conveyed into the sintering furnace after granulation is completed, and SO generated when sulfur-containing is combusted can be converted into solid CaSO to be discharged due to the addition of the appropriate amount of limestone powder into the CaSO, the desulfurization effect is achieved, and the pollution problem of the mixture in the sintering process is reduced.
Specifically, the unloading and transporting device 1 comprises a sludge storage pit 11, a sludge bulk loading material level 12 and a sludge ton bag unpacking position 13, wherein a bridge crane 14 is arranged above the sludge storage pit 11, a grab bucket of the bridge crane 14 moves above a sludge bin 21, the sludge bulk loading material level 12 is arranged on one side of the sludge storage pit 11, and the sludge ton bag unpacking position 13 is arranged on the other side of the sludge storage pit 11, so that unloading of bulk and ton bag packaged electroplating sludge is met, and the unloaded sludge is transported into the sludge bin 21 through the grab bucket of the bridge crane 14, so that the unloading and transporting of the sludge are more convenient and faster; the sludge ton bag unpacking position 13 comprises an unpacking platform 131 and a single-rail cantilever crane 132 arranged on one side of the unpacking platform 131, one end of the unpacking platform 131 is provided with a discharging scraper-trough conveyer 133 communicated with the sludge storage pit 11, the sludge ton bag is transferred to the upper part of the discharging scraper-trough conveyer 133 through the single-rail cantilever crane 132, a worker stands on the unpacking platform 131 to manually break the sludge ton bag, so that the sludge is slid into the sludge storage pit 11 by the discharging scraper-trough conveyer 133, and the unpacking operation is more convenient.
The method for sintering the electroplating sludge by using the electroplating sludge sintering system comprises the following steps:
1) ingredients
The sludge containing 60-70% of water is put into a sludge bin 21, the coal powder is put into a fuel bin 22, the limestone powder is put into a limestone bin 23, the baits of the three materials are weighed by a weigher II 27, the sludge with the weight percentage of 70-75%, the coal powder with the weight percentage of 5-10% and the limestone powder with the weight percentage of 20-25% are conveyed to a scattering machine 24 together for uniform mixing, and the mixture with the water content of 65-70% is obtained after scattering and crushing.
2) Granulating
And (2) conveying the mixed material to a granulator 25 for granulation to obtain a spherical mixture with the diameter of 2-4 mm, conveying the spherical mixture to a sintering furnace 31 for sintering at the sintering temperature of 1000-1100 ℃ for 4-6 h to form a honeycomb-shaped sintered material block after sintering.
3) Screening of sinter
The sintered material blocks are unloaded and then conveyed to a crusher 44 for material scattering, the scattered sintered material blocks enter a screening hopper 41, the sintered fine materials with the diameter smaller than 30mm in the screening hopper 41 enter a sintered fine material bin 42, the sintered fine materials in the sintered fine material bin 42 are conveyed to a granulator 25 again for secondary granulation and sintering, and the sintered coarse materials with the diameter not smaller than 30mm in the screening hopper 41 enter a sintered coarse material bin 43 and then are conveyed to a melting smelting station for melting smelting.
To sum up, the utility model discloses it is more smooth and easy to make the mud mixture defeated material after the sintering, has prevented the production of putty problem, has reduced the pollution problem of sintering process, sieves the material piece after the sintering moreover, makes the sintering material that satisfies the particle diameter requirement carry out the melting on next step and smelt and draw matte and water quenching sediment, and the sintering material that the particle diameter is too little returns and circulates granulation and sintering, makes the melting technology more stable, can draw the content of the matte of retrieving and water quenching sediment more.
The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.