CN220793901U - Roasting device for aluminum silicon oxide - Google Patents

Abstract

The utility model provides a roasting device of aluminum silicon oxide, which comprises a preheating unit and a roasting unit; the preheating unit comprises a first preheater, a second preheater, a third preheater and a first pipeline; the roasting unit comprises a first hot blast stove, a roasting furnace and a second pipeline; the solid phase outlet of the first preheater and the gas phase outlet of the third preheater are respectively connected with the inlet of the first pipeline, and the outlet of the first pipeline is connected with the inlet of the second preheater; the solid phase outlet of the second preheater is connected with the solid phase inlet of the third preheater, and the gas phase outlet of the second preheater is connected with the gas phase inlet of the first preheater; the solid phase outlet of the third preheater and the outlet of the first hot blast stove are respectively connected with the inlet of the second pipeline, the outlet of the second pipeline is connected with the inlet of the roasting furnace, and the gas phase outlet of the roasting furnace is connected with the gas phase inlet of the third preheater. The device can realize gradual preheating and roasting, heat recycling, effectively improve the roasting effect and reduce heat loss.

Description

Roasting device for aluminum silicon oxide

Technical Field

The utility model belongs to the field of solid waste recycling, and particularly relates to a roasting device for aluminum silicon oxide.

Background

The fly ash is fine ash generated after coal combustion, and because the fly ash is rich in a large amount of alumina, the full utilization of the fly ash to extract the alumina is beneficial to realizing the utilization of fly ash resources with high added value. In the related art, the collected fly ash is leached in acid solution to remove impurities to obtain pretreated fly ash, and the pretreated fly ash is subjected to high-temperature roasting treatment to remove the moisture, carbon residue and other magazines in the fly ash. At present, the high-temperature roasting treatment generally adopts a traditional rotary kiln, a shaft kiln for removing carbon and the like, but the granularity of the fly ash is finer, the water content of the material subjected to leaching impurity removal treatment is increased, and the surface of the material contains acidic residues, so that the surface viscosity of the material is higher, the feeding is difficult, the roasting effect is affected, and the carbon residue content in the finally obtained roasting product is higher; in addition, the high-temperature roasting treatment has higher temperature and higher energy consumption.

Disclosure of Invention

The utility model provides a roasting device of aluminum silicon oxide, which can realize gradual preheating and roasting and heat recycling, effectively improve the roasting effect, improve the roasting efficiency and reduce the heat loss.

In a first aspect of the present utility model, there is provided an aluminum silicon oxide roasting apparatus, the aluminum silicon oxide roasting apparatus comprising a preheating unit, a roasting unit; the preheating unit comprises a first preheater, a second preheater, a third preheater and a first pipeline; the roasting unit comprises a first hot blast stove, a roasting furnace and a second pipeline;

the solid phase outlet of the first preheater and the gas phase outlet of the third preheater are respectively connected with the inlet of the first pipeline, and the outlet of the first pipeline is connected with the inlet of the second preheater;

the solid phase outlet of the second preheater is connected with the solid phase inlet of the third preheater, and the gas phase outlet of the second preheater is connected with the gas phase inlet of the first preheater;

the solid phase outlet of the third preheater and the outlet of the first hot blast stove are respectively connected with the inlet of a second pipeline, the outlet of the second pipeline is connected with the inlet of the roasting furnace, and the gas phase outlet of the roasting furnace is connected with the gas phase inlet of the third preheater; wherein the first hot blast stove is used for providing heat.

The roasting device of the aluminum silicon oxide further comprises a drying unit, wherein an outlet of the drying unit is connected with a solid phase inlet of the first preheater.

The roasting device of the aluminum silicon oxide further comprises a crushing unit, wherein an outlet of the crushing unit is connected with a solid phase inlet of the drying unit.

The roasting device of the aluminum silicon oxide comprises a dust removing unit, wherein the dust removing unit comprises a dust remover and a first fan which are sequentially communicated;

the inlet of the dust remover is connected with the outlet of the drying unit, the gas phase outlet of the dust remover is connected with the inlet of the first fan, and the solid phase outlet of the dust remover is connected with the solid phase inlet of the first preheater.

The roasting device of aluminum silicon oxide, wherein the gas phase outlet of the first preheater is connected with the reflux port of the dust remover.

The roasting device of the aluminum silicon oxide, which is described above, further comprises a delivery pump, wherein the delivery pump is connected with the solid phase outlet of the dust remover, and the outlet of the delivery pump is connected with the solid phase inlet of the first preheater.

The roasting device of the aluminum silicon oxide further comprises a second fan, and the gas phase outlet of the first preheater is connected with the second fan.

The roasting device of the aluminum silicon oxide further comprises a buffer bin, wherein the outlet of the buffer bin is connected with the inlet of the crushing unit.

The roasting device of the aluminum silicon oxide, as described above, further comprises a quantitative feeder, wherein the inlet of the quantitative feeder is connected with the outlet of the crushing unit, and the outlet of the quantitative feeder is connected with the solid phase inlet of the drying unit.

The roasting device of the aluminum silicon oxide further comprises a second hot blast stove, wherein the second hot blast stove is connected with the gas phase inlet of the drying unit.

The roasting device of the aluminum silicon oxide comprises a cooling unit, wherein the cooling unit comprises a first cooler and a second cooler which are communicated in sequence;

the solid phase outlet of the roasting furnace is connected with the inlet of the first cooler, and the solid phase outlet of the first cooler is connected with the inlet of the second cooler.

The aluminum silicon oxide roasting device, wherein the gas phase outlet of the first cooler and the gas phase outlet of the second cooler are respectively connected with the inlet of the drying unit.

The implementation of the utility model has at least the following beneficial effects:

according to the roasting device for the aluminum silicon oxide, provided by the utility model, the gradual preheating and re-roasting treatment of the materials are realized by utilizing the arrangement of the three-stage preheater and the roasting furnace, the materials can be fully preheated and re-roasted, the influence of residual moisture, carbon residue and acid residues in the materials on the roasting effect is avoided, and the roasting effect is improved; secondly, by means of the arrangement of the first pipeline and the second pipeline, the solid-phase materials are fully contacted with the flue gas and the hot air and the heat transfer is realized, so that the roasting efficiency is improved; in addition, the heat of the high-temperature flue gas can be recycled in a gradient way, and the energy consumption is saved.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description of the embodiments of the present utility model will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an apparatus for firing aluminum silicon oxide according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of an apparatus for firing aluminum silicon oxide according to another embodiment of the present utility model;

fig. 3 is a schematic structural view of an apparatus for firing an aluminum silicon oxide according to another embodiment of the present utility model.

Reference numerals illustrate:

101-a first preheater; 102-a second preheater; 103-a third preheater; 301-a first pipe; 201-a first hot blast stove; 104-roasting furnace; 302-a second pipe; 202-a second hot blast stove; 401-a first cooler; 402-a second cooler; 501-a buffer bin; 502-a product bin; 601-a crushing unit; 701-a dosing machine; 702-a drying unit; 801-a dust remover; 802-a first fan; 901-a storage bin; 803-a second fan; 902-a transfer pump.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, in a first aspect of the present utility model, there is provided a roasting apparatus of aluminum silicon oxide, the roasting apparatus including a preheating unit, a roasting unit; the preheating unit comprises a first preheater 101, a second preheater 102, a third preheater 103 and a first conduit 301; the roasting unit comprises a first hot blast stove 201, a roasting furnace 104 and a second pipeline 302; the solid phase outlet of the first preheater 101 and the gas phase outlet of the third preheater 103 are respectively connected with the inlet of the first pipeline 301, and the outlet of the first pipeline 301 is connected with the inlet of the second preheater 102; the solid phase outlet of the second preheater 102 is connected with the solid phase inlet of the third preheater 103, and the gas phase outlet of the second preheater 102 is connected with the gas phase inlet of the first preheater 101; the solid phase outlet of the third preheater 103 and the outlet of the first hot blast stove 201 are respectively connected with the inlet of the second pipeline 302, the outlet of the second pipeline 302 is connected with the inlet of the roasting furnace 104, and the gas phase outlet of the roasting furnace 104 is connected with the gas phase inlet of the third preheater 103; wherein the first stove 201 is for providing heat.

The roasting device of the aluminum silicon oxide is used for roasting a product obtained after the pretreatment of the fly ash, and specifically can be the aluminum silicon oxide obtained after the pretreatment of the fly ash by acid solution treatment, crushing and drying.

The roasting device of the aluminum silicon oxide comprises a preheating unit and a roasting unit which are connected. The preheating unit is used for providing a place for material preheating treatment and gas-solid separation, and the roasting unit is used for providing a place for material roasting treatment and gas-solid separation after preheating.

The preheating unit comprises a first preheater 101, a second preheater 102, a third preheater 103 and a first conduit 301. The first preheater 101, the second preheater 102 and the third preheater 103 are used for providing a preheating place; the first conduit 301 is used both for transporting material and for providing a preheating location. By utilizing the cooperation of the three-stage preheater and the first pipeline, the material can be preheated gradually, and the follow-up roasting efficiency is improved.

The specific types of the first preheater 101, the second preheater 102 and the third preheater 103 are not particularly limited, and may be, for example, cyclone preheaters.

The firing unit comprises a first hot blast stove 201, a firing furnace 104 and a second duct 302. The first stove 201 is for providing heat; the roasting oven 104 is used to provide roasting sites; the second conduit 302 is used to both transport material and provide a preheating location. By utilizing the cooperation of the preheating unit and the roasting unit, the material can be gradually preheated and then roasted, the material is fully preheated and then re-roasted, the roasting efficiency is improved, the heat of high-temperature flue gas can be recycled in a gradient manner, and the energy consumption is saved.

The specific types of the first hot blast stove 201 and the roasting furnace 104 are not limited in the present utility model, and may be, for example, a hot blast stove and a roasting furnace which are conventional in the art.

In the utility model, the inlet is used for discharging solid-phase materials and hot flue gas, and the outlet is used for discharging materials and hot flue gas. For example, the solid phase inlet is used for discharging solid phase materials, the solid phase outlet is used for discharging solid phase materials, the gas phase inlet is used for discharging hot flue gas, and the gas phase outlet is used for discharging hot flue gas.

Wherein the solid phase inlet of the first preheater 101 is used for feeding material into the first preheater 101.

The solid phase outlet of the first preheater 101 and the gas phase outlet of the third preheater 103 are respectively connected with the inlet of the first pipeline 301, the outlet of the first pipeline 301 is connected with the inlet of the second preheater 102, the solid phase outlet of the second preheater 102 is connected with the solid phase inlet of the third preheater 103, that is, the solid phase outlet of the first preheater 101 is connected with the inlet of the second preheater 102 through the first pipeline 301, and the gas phase outlet of the third preheater 103 is connected with the inlet of the second preheater 102 through the first pipeline 301. The gas phase outlet of the second preheater 102 is connected to the gas phase inlet of the first preheater 101. In this way, the trend of the solid phase materials in the preheating unit is ensured to be: from the first preheater 101-the first conduit 301-the second preheater 102-the third preheater 103; the trend of the hot flue gas is as follows: from the third preheater 103-the first conduit 301-the second preheater 102-the first preheater 101. In this way, the solid phase material is ensured to be contacted with the hot flue gas when flowing through the first pipeline 301, so that the solid phase material can be further preheated in the first pipeline 301, the heat of the hot flue gas can be fully utilized, the subsequent roasting effect is improved, and the energy consumption is saved.

The solid phase outlet of the third preheater 103 is connected to the inlet of the second conduit 302, and the outlet of the second conduit 302 is connected to the inlet of the roasting furnace 104. That is, the solid phase outlet of the third preheater 103 and the outlet of the first hot blast stove 201 are connected to the inlet of the roasting furnace 104 via the second duct 302, respectively. The gas phase outlet of the roasting furnace 104 is connected to the gas phase inlet of the third preheater 103.

The first hot blast stove is mainly used for providing heat for the second pipeline, the roasting furnace and the third preheater. The first hot blast stove uses hot air as a medium and a carrier to realize heat transfer. Therefore, the solid-phase material can be contacted with hot air when flowing through the second pipeline, the heat of the hot air is fully utilized, preliminary roasting treatment can be realized in the second pipeline, the roasting effect is improved, the roasting efficiency is improved, and the energy consumption is saved.

In the above embodiment, the solid phase material discharged from the third preheater 103 has the following trend: a third preheater 103, a second pipeline 302 and a roasting furnace 104; hot air discharged from the first hot blast stove: the hot air is mixed with the flue gas generated by roasting treatment in the roasting furnace 104 along with the trend of the hot air by the first hot air furnace 201-the second pipeline 302-the roasting furnace 104 and by the first hot air furnace 201-the second pipeline 302-the third preheater 103 to form hot flue gas, and the trend of the hot flue gas is as follows: from the roasting furnace 104 to the third preheater 103.

According to the research of the utility model, the roasting device for the aluminum silicon oxide provided by the utility model is adopted to carry out preheating treatment and roasting treatment on the aluminum silicon oxide, so that the roasting effect can be effectively improved, the roasting efficiency is improved, and the heat loss is reduced. On the one hand, the three-stage preheater can be used for realizing gradual preheating of the materials, is beneficial to fully drying the materials, avoids the influence of residual moisture (such as crystal water), carbon residue, acid residues and the like in the materials on the subsequent roasting effect, so that the roasting effect is improved, and meanwhile, the arrangement of the first pipeline 301 and the second pipeline 302 can realize the full contact and heat transfer of the solid-phase materials with hot air and hot flue gas, so that the solid-phase materials are further preheated in the first pipeline 301, the primary roasting treatment is realized in the second pipeline 302, the roasting time is reduced, and the roasting efficiency is improved; in addition, the gas phase outlets of all the components are connected, so that the heat of the high-temperature flue gas can be utilized and recovered in a gradient way, thereby being beneficial to reducing the heat loss and saving the energy consumption.

In the utility model, the fly ash treated by the acid solution is conveyed to the first preheater 101 through the solid phase outlet of the first preheater 101, wherein the fly ash treated by the acid solution can be directly used as a material or can be firstly dried and then used. For example, as shown in fig. 2, in some embodiments, the apparatus for roasting aluminum silicon oxide further includes a drying unit 702, and an outlet of the drying unit 702 is connected to a solid phase inlet of the first preheater 101. In the specific implementation process of the utility model, the fly ash (namely aluminum silicon oxide) treated by the acid solution is conveyed into the drying unit through the solid phase inlet of the drying unit for drying treatment, then is output through the outlet of the drying unit, and enters the first preheater 101 through the inlet of the first preheater 101.

The utility model does not limit the specific type of the drying unit too much, so long as the drying is ensured. For example, the drying machine can be a scattering type drying machine, the scattering type drying machine can scatter massive materials, prevent the massive materials from caking, avoid caking to form blocks, effectively disperse the materials and improve the dehydration efficiency.

Before preheating the material, the material is crushed, so that the effects of the subsequent preheating and roasting are improved. In some embodiments, the above-mentioned roasting apparatus for aluminum silicon oxide further includes a crushing unit 601, and an outlet of the crushing unit 601 is connected to a solid phase inlet of the drying unit 702. The crushing unit 601 is used for crushing materials, and can crush the materials into small particles in a mechanical mode, so that the contact area of the materials is increased, and the efficiency of subsequent treatment is improved.

In the utility model, in the process of drying the materials, the smoke and dust with finer particles are inevitably generated, and the purity of the products is improved by carrying out dust removal treatment on the products of the drying treatment. In some embodiments, the above-mentioned roasting device for aluminum silicon oxide further includes a dust removing unit, where the dust removing unit includes a dust remover 801 and a first fan 802 that are sequentially communicated; wherein, the inlet of the dust remover 801 is connected with the outlet of the drying unit 702, the gas phase outlet of the dust remover 801 is connected with the inlet of the first fan 802, and the solid phase outlet of the dust remover 801 is connected with the solid phase inlet of the first preheater 101.

The product after the drying treatment is a gas-solid mixture, the dust remover 801 is used for providing a place for gas-solid separation, the first fan 802 is used for extracting flue gas and fine dust of particles, and finally obtained solid phase materials are discharged through a solid phase outlet of the dust remover 801 and enter the first preheater 101 through a solid phase inlet of the first preheater 101.

In the above embodiment, due to the arrangement of the first fan 802, the pressure in the dust remover 801 may fluctuate, and the arrangement of the conveying pump 902 is beneficial to improving the conveying efficiency of the material. In some embodiments, the above-mentioned roasting device for aluminum silicon oxide further comprises a transfer pump 902, wherein an inlet of the transfer pump 902 is connected to a solid phase outlet of the dust remover, and an outlet of the transfer pump 902 is connected to a solid phase inlet of the first preheater. The conveying pump utilizes the energy of air flow to convey materials along the air flow direction in the closed pipeline, and the mode of pneumatically conveying the granular materials is beneficial to improving the conveying efficiency.

In the implementation process of the utility model, the roasting device further comprises a storage bin 901, the solid phase outlet of the dust remover 801 is connected with the inlet of the storage bin 901, the inlet of an outlet conveying pump 902 of the storage bin 901 is connected, and the outlet of the conveying pump 902 is connected with the solid phase inlet of the first preheater 101. The conveying mode of the conveying pump 902 may be pneumatic conveying.

In one embodiment, as shown in FIG. 2, the gas phase outlet of the first preheater 101 is connected to the return port of the dust separator 801. This ensures that the flue gas produced by the first preheater 101 can be drawn through the dust separator 801 and the first fan 802.

In another embodiment, as shown in fig. 3, a second fan 803 is further included, and the gas phase outlet of the first preheater is connected to the second fan, so as to ensure that the flue gas generated by the first preheater 101 can be pumped away by the second fan 803.

The roasting device of the utility model can be arranged independently or can be directly connected with the acid treatment process device. In some embodiments, the roasting apparatus further comprises a surge bin 501, the outlet of the surge bin 501 being connected to the inlet of the crushing unit 601. A buffer bin 501 is arranged in front of the crushing unit 601, so that the influence of the previous process on the roasting device of the utility model is avoided.

The amount of the aluminum silicon oxide to be treated may be adjusted according to the capacities of the first, second and third preheaters 101, 102 and 103, and the present utility model is not limited thereto. In some embodiments, the roasting apparatus further comprises a dosing machine 701, the inlet of the dosing machine 701 being connected to the outlet of the crushing unit 601, the outlet of the dosing machine 701 being connected to the solid phase inlet of the drying unit 702. The aluminum silicon oxide after the crushing treatment is continuously weighed by the quantitative feeder 701 and transferred to the drying unit 702.

In some embodiments, the roasting apparatus further comprises a second hot blast stove 202, the second hot blast stove 202 being connected to the gas phase inlet of the drying unit 702. The heat source of the drying unit 702 is provided by the second hot blast stove 202. The hot air of the second hot blast stove 202 is utilized to provide heat, so that full contact and heat transfer between the solid-phase material and the hot air can be realized, and volatilization of moisture on the surface of the material can be realized.

After the roasting treatment, the method further comprises the step of cooling the roasted product. In some embodiments, the roasting device further comprises a cooling unit, wherein the cooling unit comprises a first cooler 401 and a second cooler 402 which are sequentially communicated; the solid phase outlet of the roasting furnace 104 is connected to the inlet of the first cooler 401, and the solid phase outlet of the first cooler 401 is connected to the inlet of the second cooler 402.

During the cooling process, a small amount of unreacted complete material may form a cooling gas, and in some embodiments, the gas phase outlet of the first cooler 401 and the gas phase outlet of the second cooler 402 are connected to the inlet of the drying unit 702, respectively. Therefore, the cooling gas is recycled, which is beneficial to reducing the raw material loss.

The utility model does not limit the connection mode excessively, and only needs to ensure the circulation of solid-phase materials and smoke, for example, the connection can be a pipeline connection.

The specific types of the first preheater 101, the second preheater 102 and the third preheater 103 are not limited in the present utility model, and may be, for example, cyclone preheaters.

The utility model does not limit the use mode of the roasting device too much, and in one embodiment, the method specifically comprises the following steps: the first hot blast furnace 201 and the second hot blast furnace 202 are opened, the temperature of the drying unit is 300-800 ℃, and the temperature in the roasting furnace and the second pipeline is 700-950 ℃;

conveying the fly ash (namely aluminum silicon oxide) subjected to acid solution treatment to a crushing unit through a buffer bin, discharging from an outlet of the crushing unit after crushing treatment, weighing and metering by a quantitative feeder, conveying to a drying unit for preliminary drying, discharging from an outlet of the drying unit, and controlling the temperature of a material outlet to be 100-300 ℃;

under the action of a fan, the gas-solid mixture enters a dust remover, wherein the solid-phase material enters a storage bin, and the flue gas and fine dust are discharged through an outlet of the fan and sent to a tail gas treatment unit;

the solid phase material is conveyed into a first preheater through pneumatic conveying to perform first preheating treatment and first gas-solid separation, and first hot flue gas generated after the first preheating treatment returns into the dust remover and is pumped away by a first fan; the solid phase material after the first preheating treatment is discharged from a solid phase outlet of the first preheater, enters the first pipeline through an inlet of the first pipeline, is contacted and mixed with hot flue gas generated from the third preheater, enters the second preheater through an outlet of the first pipeline to perform second preheating treatment and second gas-solid separation, and the hot flue gas generated after the second preheating treatment is discharged from a gas phase outlet of the second preheater and returns to the first preheater to be used as a heat source; the solid phase material after the second preheating treatment is discharged from a solid phase outlet of the second preheater, enters a third preheater for third preheating treatment and third gas-solid separation, and hot flue gas generated after the third preheating treatment is discharged from a gas phase outlet of the third preheater and is conveyed into a first pipeline to be used as a heat source;

discharging the solid phase material after the third preheating treatment from a solid phase outlet of the third preheater, performing contact mixing with hot air of a second hot blast stove in a second pipeline, performing preliminary roasting (suspension roasting), and finally entering a roasting furnace together for roasting treatment;

the solid phase material after roasting treatment is discharged from a solid phase outlet of a roasting furnace, enters the first cooler through an inlet of the first cooler, is discharged from a solid phase outlet of the first cooler, enters the second cooler through an inlet of the second cooler, is discharged from a solid phase outlet of the second cooler to a product bin, and cooling smoke generated by the first cooler and the second cooler is discharged from a gas phase outlet of the first cooler and a gas phase outlet of the second cooler, and enters the drying unit through a gas phase inlet of the drying unit, so that the material and the heat are recovered.

The utility model does not limit the temperature of the first preheater, the second preheater and the third preheater excessively, and only ensures that the first hot blast stove continuously supplies hot air and keeps the temperature of the second pipeline at 700-950 ℃. For example, the temperature of the first preheater is 200 to 400 ℃, the temperature of the second preheater is 300 to 500 ℃, and the flue gas temperature of the third preheater is 700 to 950 ℃.

The temperature of the first cooler and the temperature of the second cooler are not excessively limited, and the temperature of the first cooler and the temperature of the second cooler can be specifically adjusted according to actual conditions. For example, the temperature of the solid phase material discharged through the solid phase outlet of the second cooler is 80 to 200 ℃.

The length of the second pipeline is not limited too much, and can be determined according to the roasting time.

The roasting apparatus of the present utility model will be further described by way of specific examples. Referring to fig. 2, the roasting apparatus used at least includes: the device comprises a buffer bin 501, a crushing unit 601, a quantitative feeder 701, a drying unit 702, a dust removing unit, a preheating unit, a roasting unit, a conveying pump 902 and a second hot blast stove 202;

the preheating unit comprises a first preheater 101, a second preheater 102, a third preheater 103 and a first conduit 301; the roasting unit comprises a first hot blast stove 201, a roasting furnace 104 and a second pipeline 302; the dust removing unit comprises a dust remover 801 and a first fan 802 which are communicated in sequence; wherein the first hot blast stove 201 and the second hot blast stove 202 are used for providing heat;

the outlet of the buffer bin 501 is connected with the inlet of the crushing unit 601, the outlet of the crushing unit 601 is connected with the inlet of the quantitative feeder 701, the outlet of the quantitative feeder 701 is connected with the solid phase inlet of the drying unit 702, the outlet of the drying unit 702 is connected with the inlet of the dust remover 801, the gas phase outlet of the dust remover 801 is connected with the inlet of the first fan 802, the inlet of the delivery pump is connected with the solid phase outlet of the dust remover 801, and the outlet of the delivery pump is connected with the solid phase inlet of the first preheater 101;

the solid phase outlet of the first preheater 101 is connected with the inlet of the first pipeline 301, the outlet of the first pipeline 301 is connected with the inlet of the second preheater 102, the solid phase outlet of the second preheater 102 is connected with the solid phase inlet of the third preheater 103, the solid phase outlet of the third preheater 103 is connected with the inlet of the second pipeline 302, the outlet of the second pipeline 302 is connected with the inlet of the roasting furnace 104, the solid phase outlet of the roasting furnace 104 is connected with the inlet of the first cooler 401, the solid phase outlet of the first cooler 401 is connected with the inlet of the second cooler 402, and the solid phase outlet of the second cooler 402 is connected with the product bin 502;

the gas phase outlet of the first preheater 101 is connected with the reflux port of the dust remover 801, the gas phase outlet of the second preheater 102 is connected with the gas phase inlet of the first preheater 101, the gas phase outlet of the third preheater 103 is connected with the inlet of the first pipeline 301, the outlet of the first pipeline 301 is connected with the inlet of the second preheater 102, and the gas phase outlet of the roasting furnace 104 is connected with the gas phase inlet of the third preheater 103;

the outlets of the first hot blast stoves 201 are respectively connected with the inlets of the second pipelines 302, and the second hot blast stoves 202 are connected with the gas phase inlets of the drying units 702; the gas phase outlet of the first cooler 401 and the gas phase outlet of the second cooler 402 are respectively connected with the inlet of the drying unit 702.

The fly ash treated by the acid solution is used as wet material to be treated, the moisture content of the wet material is 40-60%, the alumina content is 40-60%, the silica content is 30-50%, the calcium oxide content is 0.1-5%, the ferric oxide content is 0.1-5%, the sodium oxide content is 0.1-10%, the titanium oxide content is 0.1-5%, and the content of acidic substances is 0.1-10%.

The specific operation steps are as follows: the first hot blast stove and the second hot blast stove are opened, the temperature of the drying unit is 300-800 ℃, and the temperature in the roasting furnace and the second pipeline is 700-950 ℃;

the fly ash after acid solution treatment is conveyed to a crushing unit 601 through a buffer bin 501, is discharged from an outlet of the crushing unit 601 after crushing treatment, is conveyed to a drying unit 702 for preliminary drying after weighing and metering by a quantitative feeder 701, and is discharged from an outlet of the drying unit 702; the water content of the material discharged through the outlet of the drying unit 702 is 5-10%, the granularity of the powder is 5-30 mu m, and the temperature of the material discharged through the drying unit is 100-300 ℃;

the gas-solid mixture enters the dust remover 801 under the action of the first fan 802, wherein the solid phase material enters the storage bin 901, and the flue gas and the dust with finer particles are discharged through the outlet of the first fan 802 and sent to the tail gas treatment unit;

the solid phase material is conveyed into a first preheater 101 through pneumatic conveying to perform first preheating treatment (the temperature of the solid phase material is 200-400 ℃), first gas-solid separation is performed, and first hot flue gas generated after the first preheating treatment returns into a dust remover and is pumped away by a first fan 802; the solid phase material after the first preheating treatment is discharged from a solid phase outlet of the first preheater 101, enters the first pipeline 301 through an inlet of the first pipeline 301, is in contact and mixed with hot flue gas (the flue gas temperature is 700-950 ℃) generated in the third preheater 103, enters the second preheater 102 through an outlet of the first pipeline 301 (the temperature of the solid phase material is 300-500 ℃) for the second preheating treatment and the second gas-solid separation, and the hot flue gas generated after the second preheating treatment is discharged from a gas phase outlet of the second preheater 102 and returns to the first preheater 101 to serve as a heat source; the solid phase material after the second preheating treatment is discharged from a solid phase outlet of the second preheater 102, enters the third preheater 103 to perform third preheating treatment and third gas-solid separation, and hot flue gas generated after the third preheating treatment is discharged from a gas phase outlet of the third preheater 103 and is conveyed into the first pipeline 301 to serve as a heat source;

the solid phase material after the third preheating treatment is discharged from a solid phase outlet of the third preheater 103, is contacted and mixed with hot air of the second hot blast stove 202 through a second pipeline 302 (the residence time of the solid phase material in the second pipeline is 2-10 s), is subjected to preliminary roasting (suspension roasting), and finally enters a roasting furnace 104 together (the residence time of the solid phase material in the roasting furnace 104 is 2-10 s) for roasting treatment;

the solid phase material after roasting treatment is discharged from a solid phase outlet of a roasting furnace 104, enters the first cooler 401 through an inlet of the first cooler 401, is discharged from a solid phase outlet of the first cooler 401, enters the second cooler 402 through an inlet of the second cooler 402, is discharged from a solid phase outlet of the second cooler 402 to a product bin, cooling smoke generated by the first cooler 401 and the second cooler 402 is discharged from a gas phase outlet of the first cooler 401 and a gas phase outlet of the second cooler 402, and enters the drying unit 702 through a gas phase inlet of the drying unit 702, wherein the temperature of the material discharged from the solid phase outlet of the second cooler 402 is 80-200 ℃, and the carbon residue content is 0.1-2%.

It should be noted that, the numerical values and the numerical ranges related to the embodiments of the present utility model are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

The embodiments of the present utility model have been described above. However, the present utility model is not limited to the above embodiment. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A roasting device of aluminum silicon oxide, which is characterized by comprising a preheating unit and a roasting unit; the preheating unit comprises a first preheater, a second preheater, a third preheater and a first pipeline; the roasting unit comprises a first hot blast stove, a roasting furnace and a second pipeline;

the solid phase outlet of the first preheater and the gas phase outlet of the third preheater are respectively connected with the inlet of the first pipeline, and the outlet of the first pipeline is connected with the inlet of the second preheater;

the solid phase outlet of the second preheater is connected with the solid phase inlet of the third preheater, and the gas phase outlet of the second preheater is connected with the gas phase inlet of the first preheater;

the solid phase outlet of the third preheater and the outlet of the first hot blast stove are respectively connected with the inlet of a second pipeline, the outlet of the second pipeline is connected with the inlet of the roasting furnace, and the gas phase outlet of the roasting furnace is connected with the gas phase inlet of the third preheater; wherein the first hot blast stove is used for providing heat.

2. The apparatus for roasting aluminum silicon oxide according to claim 1, further comprising a drying unit, wherein an outlet of the drying unit is connected to a solid phase inlet of the first preheater.

3. The apparatus for firing aluminum silicon oxide according to claim 2, further comprising a crushing unit, an outlet of the crushing unit being connected to a solid phase inlet of the drying unit.

4. The roasting device of aluminum silicon oxide according to claim 2, further comprising a dust removal unit, wherein the dust removal unit comprises a dust remover and a first fan which are sequentially communicated;

the inlet of the dust remover is connected with the outlet of the drying unit, the gas phase outlet of the dust remover is connected with the inlet of the first fan, and the solid phase outlet of the dust remover is connected with the solid phase inlet of the first preheater.

5. The apparatus for roasting aluminum silicon oxide according to claim 4, wherein the gas phase outlet of the first preheater is connected to the return port of the dust remover.

6. The apparatus for roasting aluminum silicon oxide according to claim 4, further comprising a transfer pump, wherein an inlet of the transfer pump is connected to a solid phase outlet of the dust remover, and an outlet of the transfer pump is connected to a solid phase inlet of the first preheater.

7. The apparatus for roasting aluminum silicon oxide according to claim 6, further comprising a second fan, wherein the gas phase outlet of the first preheater is connected to the second fan.

8. An apparatus for roasting aluminum silicon oxide according to claim 3, further comprising a surge bin, the outlet of which is connected to the inlet of the crushing unit; and/or the number of the groups of groups,

the device also comprises a quantitative feeder, wherein the inlet of the quantitative feeder is connected with the outlet of the crushing unit, and the outlet of the quantitative feeder is connected with the solid phase inlet of the drying unit; and/or the number of the groups of groups,

the drying unit is characterized by further comprising a second hot blast stove, wherein the second hot blast stove is connected with the gas phase inlet of the drying unit.

9. The apparatus for roasting aluminum silicon oxide according to any one of claims 1 to 7, further comprising a cooling unit including a first cooler, a second cooler, which are sequentially communicated;

the solid phase outlet of the roasting furnace is connected with the inlet of the first cooler, and the solid phase outlet of the first cooler is connected with the inlet of the second cooler.

10. The apparatus for roasting aluminum silicon oxide according to claim 9, wherein the gas phase outlet of the first cooler and the gas phase outlet of the second cooler are connected to the inlet of the drying unit, respectively.