CN108147799B - Roasting and rotating integrated furnace of circulating fluidized bed - Google Patents

Roasting and rotating integrated furnace of circulating fluidized bed Download PDF

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CN108147799B
CN108147799B CN201711451630.0A CN201711451630A CN108147799B CN 108147799 B CN108147799 B CN 108147799B CN 201711451630 A CN201711451630 A CN 201711451630A CN 108147799 B CN108147799 B CN 108147799B
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roasting
furnace
fluidized bed
circulating fluidized
activating
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CN108147799A (en
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杨松
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Dongying Ruigang Pipeline Engineering Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
    • F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
    • F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
    • F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/24—Devices for removal of material from the bed
    • F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The invention relates to the technical field of environmental protection and resource recycling, in particular to a roasting and rotating integrated furnace of a circulating fluidized bed. The method is characterized in that: the device comprises a roasting and activating rotary furnace and a circulating fluidized bed coal furnace, wherein the guide pipe arranged beside an outlet of a return pipe is used for reducing the local chamber pressure of the outlet of the return pipe, so that the height of a material column of a vertical pipe is reduced, the purposes of material balance and separation efficiency guarantee are achieved, and the circulating fluidized bed coal furnace and the roasting and activating rotary furnace can be effectively combined and normally run.

Description

Roasting and rotating integrated furnace of circulating fluidized bed
Technical Field
The invention relates to the technical field of environmental protection and resource recycling, in particular to a roasting and rotating integrated furnace of a circulating fluidized bed.
Background
The kaolin has wide application, is mainly used in the industries of paper making, ceramics, rubber and plastics, chemical industry, coating, medicine and the like, and has the main mineral component of kaolinite, wherein the crystal chemical formula of the kaolinite is 2SiO2·Al2O3·2H2Removing organic matters and reconstructing crystal lattices by a calcining process; the mechanical crushing and the air flow crushing have enough fineness to meet the requirements of preparing fillers, paper-making coatings, molecular sieves and catalyst carriers of cable plastics, rubber sealing rings and the like. Fly ash of circulating fluidized bed coal-fired boiler is the most common waste in the production process of boiler, and the main component of fly ash is SiO2、Al2O3The method is a source of occupational disease hazard factors of pneumoconiosis, is relatively harmful to personnel in a workplace, is easy to cause occupational diseases such as the pneumoconiosis and the like, causes pollution to the environment due to dust dissipated in the air, changes waste into valuable and prepares kaolin by high-value utilization, and is a problem which engineering technicians in the technical field want to solve. Chinese invention patent (CN 201610683499.X, patent name is sludge drum external heat drying and circulating fluidized bed incineration integrated and tail gas purification device) discloses a sludge drum external heat drying and circulating fluidized bed incineration integrated and tail gas purification device, which is characterized in that: it contains circulating fluidized bed, mummification system and tail gas clean-up system, and the mummification system contains rotary kiln cylinder, fan and condenser, and rotary kiln cylinder alternates to set up and is being inOn a tail flue of the circulating fluidized bed, water vapor and odor generated in the wet sludge drying process are condensed by a condenser to remove moisture, and then are sent into a hearth of the circulating fluidized bed to be combusted and deodorized; two air preheaters are arranged in the tail flue and are respectively connected with a primary air port and a secondary air port arranged on a hearth of the circulating fluidized bed; the tail gas purification system comprises an active carbon injection device, a bag-type dust remover and a wet desulphurization system which are sequentially arranged behind an air preheater; a gas conveying pipe is arranged between the bag-type dust collector and the wet desulphurization system and is connected with a primary air port; the invention is used for drying and incinerating sludge. The invention patent of China (the patent number is CN201210252301.4, the patent name is a rotary kiln for calcining phosphogypsum) discloses a rotary kiln for calcining phosphogypsum, which is characterized by comprising a kiln, a rotary kiln cylinder and an electrostatic dust collector, wherein the rotary kiln cylinder is arranged in the center of the kiln, one end of the kiln is provided with a combustion chamber, the top of the kiln is provided with three partition walls and two fire-blocking walls, the bottom of the kiln is provided with two lower partition walls and three lower fire-blocking walls, the bottom of the kiln is divided into six smoke settling chambers and three high, medium and constant temperature areas, smoke fire tubes are uniformly distributed on the inner wall of the rotary kiln cylinder, one end of the rotary kiln cylinder is provided with a hot smoke inlet, the other end of the rotary kiln cylinder is provided with an outlet, the outlet is respectively; the combination of the fluidized bed furnace and the rotary kiln can fully utilize heat, increase the contact surface of the phosphogypsum and a smoke and fire tube of the rotary kiln, and play a role of turning materials, the phosphogypsum does not contact with smoke, thereby ensuring the quality and whiteness of products, saving energy and meeting the environmental protection requirement of smoke dust.
The technical scheme provided by the prior art 1 aims at providing a sludge drum external heat drying and circulating fluidized bed incineration integrated and tail gas purification device, which is closer to the design scheme of the scheme, but the outlet temperature of a hearth of a circulating fluidized bed coal-fired furnace is 900 +/-50 ℃, the roasting and activating temperature of kaolin is required to reach 900-1280 ℃, and the rotary kiln drum is arranged on a tail flue of the circulating fluidized bed in an inserting manner and is heated only by drying, so that the process temperature condition required by roasting and activating cannot be met; the prior art 2 adopts a technical scheme of combining a fluidized bed furnace and a rotary kiln, but the flue gas of the fluidized bed furnace is not contacted with materials, and the smoke dust (fly ash) in the flue gas is used as a pollutant and is discharged to a chimney after being purified by a settling chamber and an electrostatic dust collector.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a roasting and rotating integrated furnace of a circulating fluidized bed, which is characterized in that: comprises a roasting activation rotary furnace and a circulating fluidized bed coal-fired furnace.
The roasting activation rotary furnace comprises a distributor, a driving gear assembly, a carrier roller assembly, a roasting activation rotary furnace cylinder assembly and an air separator.
The distributor comprises a screw conveyor, an ejector, a cooling jacket, a diversion cone, a positioning frame, a spiral blade and a hot air channel. The spiral conveyor is connected with the ejector, and the splitter cone and the spiral blades are fixed on the roasting activation rotary cylinder by the positioning frame and rotate along with the roasting activation rotary cylinder. The hot air duct is connected with the ejector, and the periphery of the ejector is wrapped by a cooling jacket and is connected with the roasting activation rotary cylinder through a mechanical seal assembly I.
The driving gear assembly comprises a transmission system and a driving gear, the transmission system is connected with the driving gear, and the transmission system is installed on the base.
The carrier roller subassembly includes roller set, base, the roller set is installed on the base.
The roasting activation rotary furnace cylinder component comprises a mechanical seal component I, a ring gear, a roasting activation rotary cylinder, a roller way component, a high-alumina ball stack layer and a mechanical seal component II.
The ring gear is embedded on the roasting activation rotary cylinder body and drives the roasting activation rotary cylinder body to rotate around the central axis of the roasting activation rotary cylinder body under the driving of the driving gear assembly.
The roasting activation rotary cylinder is embedded with two sets of roller way assemblies in the front and back, the positioning frame is arranged on the carrier roller assembly and can rotate around the central axis of the carrier roller assembly by means of the roller wheel of the carrier roller assembly, the air separator is connected with the roasting activation rotary cylinder through a mechanical sealing assembly II, and the inlets of the air separator are designed to be three spiral inlets uniformly distributed in the circumferential direction.
The distributor is arranged on the central axis of the hot air duct and extends into the roasting activation rotary cylinder, and the positioning frame and the spiral blades are positioned in the roasting activation rotary cylinder.
The high-alumina ball pile layer is placed in the roasting and activating rotary cylinder body, and when the roasting and activating rotary cylinder body rotates around the central axis of the roasting and activating rotary cylinder body, the high-alumina ball pile layer continuously rolls and rubs with each other under the action of the friction force of the wall of the roasting and activating rotary cylinder body.
The circulating fluidized bed coal-fired furnace comprises a cyclone separator, a hearth and a material returning system, wherein the material returning system comprises a material returning device and a guide chamber, the material returning device comprises a vertical pipe, a U-shaped valve and a material returning pipe, and the guide chamber comprises an air induction port, a guide pipe, a negative pressure chamber and an air blowing chamber.
The inventor finds that the use temperature of roasting activation of the rotary roasting activation furnace is 900-1280 ℃, the temperature of a coal-fired hearth of a circulating fluidized bed is 900 +/-50 ℃, the fluidized layer, namely coking loses the fluidized state after the temperature is exceeded, so that the rotary roasting activation furnace cannot normally run, meanwhile, the heating surface is not arranged outside the water-cooled wall heating surface arranged on the part of the hearth except the fluidized layer, and the working temperature required by the rotary roasting activation furnace is realized by conveying fine coal powder inwards for combustion to supplement the required heat value.
The inventor finds that the material returning device is used for supplying air to high-temperature solid particles separated by the cyclone separator through the vertical pipe through the isobaric air chamber at the bottom and returning the air to the hearth for burning again through the material returning pipe, the U-shaped valve is arranged between the vertical pipe and the material returning pipe, and the isobaric air chamber is arranged at the bottom of the U-shaped valve for supplying air to ensure the fluidization of the high-temperature solid particles. The pressure difference between the material column in the vertical pipe and the hearth pressure is the guarantee for driving the high-temperature solid particles to be continuously conveyed to the hearth. Because the present case is a circulating fluidized bed roasting and rotating integrated furnace, the discharge end of the roasting and activating rotary furnace is a winnowing machine, the design requirement smoke flow velocity is lower to reduce the kinetic energy of the carried finished product particles, thereby separating the finished product particles with enough fineness, and the air supply to the hearth needs to overcome the resistance of the hearth, the cyclone separator, the ejector, the spiral paddle, the winnowing machine and other parts, therefore, the air supply requirement to the coal-fired hearth of the circulating fluidized bed is large air pressure and small air volume, the pressure head of the hearth is larger, according to the requirement of the pressure difference balance between the material column in the vertical pipe and the hearth pressure, the material column height requirement of the vertical pipe is designed to be higher, namely, the material return quantity of the high-temperature solid particles is high, and the proportion of the material return quantity and the fly ash of the circulating fluidized bed coal-fired boiler entering the roasting and activating rotary furnace is determined by the cyclone separator, in, the load of the air separator increases and the separation efficiency decreases. In order to solve the problems, a guide chamber is designed at the outlet end of the return pipe, the guide chamber is in a negative pressure state, and the guide pipe arranged beside the outlet of the return pipe reduces the local chamber pressure at the outlet of the return pipe, so that the height of a material column of a vertical pipe is reduced, the purposes of material balance and separation efficiency guarantee are achieved, and the circulating fluidized bed coal-fired furnace and the roasting activation rotary furnace can be effectively combined and normally run.
The inventor finds that the fire coal is burnt out at the temperature of 900 +/-50 ℃ in a circulating fluidized bed hearth, then is separated by a cyclone separator, coarse particles are returned to the hearth by a return feeder to be continuously combusted, the particle size of fine particles carried in the flue gas discharged by the cyclone separator is 38-58 mu m, and the main component is Al2O3、SiO2And unburned C, called circulating fluidized bed coal-fired boiler fly ash, which has good activity of the main component SiO2About 45-55% of Al2O3The content of the carbon is about 35-38%, the content of unburned C is about 3-5%, and the carbon is used as impurity Si in coal and forms SiO under the condition of low oxygen content after being burnt out at high temperature in a hearth of a coal-fired boiler of a circulating fluidized bed2Aerosol with Al2O3The unburned C particles are carried by high-speed flue gas, are crushed by impact, are separated at high temperature and enter a roasting activation rotary furnace, and have larger specific surface area and cation exchange capacity.
The inventor finds that in order to realize the high-value utilization of fly ash of a circulating fluidized bed coal-fired boiler for preparing kaolin, the requirements on chemical components and physical properties of the kaolin need to be met according to GB/T14563-2008 of kaolin and test method thereof, and although the specific requirements of various industries on kaolin fillers are not completely consistent, the fineness of the kaolin fillers is equal to that of Al2O3/SiO2The ratio is specified clearly, so that the fly ash of the circulating fluidized bed coal-fired boiler staying at the bottom of the roasting and activating rotary furnace is ground by utilizing the continuous rolling and mutual friction of the high-alumina balls in the roasting and activating rotary furnace along with the rotation of the high-alumina balls, and the Al is added at the high temperature of 900-1280 ℃ of roasting and activating2O3、SiO2When the lattice reconstruction is completed, due to the fact that intermolecular bond energy is reduced and the space is increased, kaolin finished products with fineness of 1000-1200 meshes can be easily obtained under the friction grinding of the high-alumina balls, meanwhile, component particles fallen off by the mutual friction grinding of the high-alumina balls are also supplemented to the kaolin finished products, and impurities needing to be separated are not generated.
The inventor finds that to prevent the leakage of waste gas pollutants, reliable sealing needs to be designed at two ends of a roasting and activating rotary furnace, because the temperature difference between the inside and the outside of the furnace body is large, the fineness of materials reaches more than 1000 meshes, and the working condition is a positive pressure state, the sealing forms such as labyrinth, packing and the like are easy to lose efficacy, only mechanical sealing is suitable, and the purposes of cooling, lubricating, dust prevention and the like can be well solved by spraying hydraulic oil on the sealing surface of a moving ring and a static ring.
The inventor finds that the distributor is designed for supplementing high-alumina balls and conveying powder such as a guiding agent and clean coal, the splitter cone is designed at the outlet end of the distributor cone and mainly aims at dispersing the materials and uniformly mixing the materials with fly ash of a coal-fired boiler of a circulating fluidized bed, the uniformly mixed powder is wrapped by high-temperature smoke and is thrown to a spiral blade along the rotating tangential direction of the spiral blade under the action of centrifugal force, the powder is thrown to the inner wall of a roasting and activating rotary furnace along the rotating tangential direction of the spiral blade under the action of friction of the inner wall of the furnace body, the powder is prevented by a high-alumina ball pile layer, gravity, the spiral blade and the like to lose kinetic energy and stay at the bottom of the furnace body, the powder is mutually rubbed and ground by the.
The inventor finds that the air separator inlet is designed into three spiral inlets uniformly distributed along the circumferential direction, can avoid cyclone wind belts spirally advancing along the inner wall of the roasting activation rotary cylinder, which are short-circuited by smoke wind channels at two ends of the roasting activation rotary furnace and guide spiral blades to lift, and also has the advantages that the inlet ventilation area is large, the smoke flow rate is reduced under the condition of the same ventilation volume, the kinetic energy of carried particles is reduced, and thus the finished particles with enough fineness are sorted.
Compared with the prior art, the invention at least has the following advantages: firstly, fly ash of a coal-fired boiler of a circulating fluidized bed is the most common waste in the production process of the boiler, is greatly harmful to personnel in a workplace, is easy to cause occupational diseases such as pneumoconiosis and the like, and causes pollution to the environment by dust dissipated in the air. The invention changes waste into valuable and is used for preparing kaolin, thereby not only reducing environmental pollution, but also reducing production cost; secondly, to realize the high-value utilization of fly ash of the circulating fluidized bed coal-fired boiler for preparing kaolin, the requirements of chemical components and physical properties of the kaolin are required to be met according to GB/T14563-2008 of Kaolin and test method thereof, and although the concrete requirements of various industries on kaolin fillers are not completely consistent, the fineness of the kaolin fillers is equal to that of Al2O3/SiO2The ratio is specified clearly, so that the fly ash of the circulating fluidized bed coal-fired boiler staying at the bottom of the roasting and activating rotary furnace is ground by utilizing the continuous rolling and mutual friction of the high-alumina balls in the roasting and activating rotary furnace along with the rotation of the high-alumina balls, and the Al is added at the high temperature of 900-1280 ℃ of roasting and activating2O3、SiO2When the lattice reconstruction is completed, due to the fact that intermolecular bond energy is reduced and the space is increased, kaolin finished products with fineness of 1000-1200 meshes can be easily obtained under the friction grinding of the high-alumina balls, meanwhile, component particles fallen off by the mutual friction grinding of the high-alumina balls are also supplemented to the kaolin finished products, and impurities needing to be separated are not generated; thirdly, the mechanical sealing scheme is adopted for sealing two ends of the roasting activation rotary furnace, so that the sealing problem under the high-temperature condition can be reliably completed, and the emission of waste gas pollutants is avoided; fourthly, the inlets of the air separator are designed into three spiral inlets which are uniformly distributed along the circumferential direction, so that the short circuit of smoke wind channels at two ends of the roasting activation rotary furnace can be avoided, cyclone wind belts which are raised by spiral blades and spirally advance along the inner wall of the roasting activation rotary cylinder body can be guided, and the ventilation area of the inlets is larger than that of the outlets, so that the smoke flow velocity is reduced under the condition of the same ventilation quantity, the kinetic energy of carried particles is reduced, and the finished product particles with enough fineness are sorted out; fifthly, the guide is designed beside the outlet of the return pipeThe guiding pipe reduces the local chamber pressure at the outlet of the return pipe, thereby reducing the height of the material column of the vertical pipe, realizing the purposes of material balance and separation efficiency guarantee, and enabling the circulating fluidized bed coal-fired furnace and the roasting activation rotary furnace to be effectively combined and to normally operate.
Drawings
FIG. 1 is a schematic structural view of a circulating fluidized bed roasting and rotating integrated furnace in a front view.
FIG. 2 is a schematic view of the A-A section structure of a circulating fluidized bed roasting and rotating integrated furnace of the present invention.
FIG. 3 is a schematic diagram of a partial enlarged structure B of a circulating fluidized bed roasting and rotating integrated furnace of the present invention.
FIG. 4 is a schematic structural diagram of a large sample C of a circulating fluidized bed roasting and rotating integrated furnace.
FIG. 5 is a schematic diagram of the D-direction structure of a circulating fluidized bed roasting and rotating integrated furnace of the present invention.
FIG. 6 is an enlarged partial structural view of the E part of the circulating fluidized bed roasting and rotating integrated furnace.
I-roasting activation rotary furnace II-circulating fluidized bed coal-fired furnace
1-distributor 2-drive gear assembly 3-carrier roller assembly
4-roasting activation rotary furnace barrel component 5-air separator 6-screw conveyor 7-ejector
8-cooling jacket 9-diffluence cone 10-positioning frame 11-spiral blade
12-transmission system 13-driving gear 14-hot air duct 15-mechanical seal assembly I
16-ring gear 17-roller way assembly 18-roasting activation rotary cylinder
19-high-alumina ball stack layer 20-mechanical seal assembly II 21-roller set 22-base
23-cyclone separator 24-hearth 25-material returning system 26-material returning device
27-guide chamber 28-vertical pipe 29-U-shaped valve 30-return pipe 31-induced draft opening
32-guide tube 33-negative pressure chamber 34-blowing chamber.
Detailed Description
The invention is further described with reference to the following detailed description of embodiments and drawings.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the circulating fluidized bed roasting and rotating integrated furnace is characterized in that: comprises a roasting activation rotary furnace I and a circulating fluidized bed coal-fired furnace II.
The roasting activation rotary furnace I comprises a distributor 1, a driving gear component 2, a carrier roller component 3, a roasting activation rotary furnace cylinder component 4 and an air separator 5.
The distributor 1 comprises an auger conveyor 6, an ejector 7, a cooling jacket 8, a diversion cone 9, a positioning frame 10, a spiral blade 11 and a hot air duct 14. The spiral conveyor 6 is connected with the ejector 7, and the diversion cone 9 and the spiral blades 11 are fixed on the roasting and activating rotary cylinder 18 through the positioning frame 10 and rotate along with the roasting and activating rotary cylinder 18. The hot air duct 14 is connected with the ejector 7, and the periphery of the ejector 7 is wrapped by the cooling jacket 8 and is connected with the roasting and activating rotary cylinder 18 through the mechanical sealing component I15.
The driving gear assembly 2 comprises a transmission system 12 and a driving gear 13, the transmission system 12 is connected with the driving gear 13, and the transmission system 12 is installed on a base 22.
The carrier roller assembly 3 comprises a roller set 21 and a base 22, wherein the roller set 21 is installed on the base 22.
The roasting and activating rotary furnace cylinder assembly 4 comprises a mechanical seal assembly I15, a ring gear 16, a roasting and activating rotary cylinder 18, a roller way assembly 17, a high-alumina ball stack layer 19 and a mechanical seal assembly II 20.
The ring gear 16 is embedded and sleeved on the roasting and activating rotary cylinder 18, and the roasting and activating rotary cylinder 18 is driven to rotate around the central axis of the ring gear under the driving of the driving gear component 2.
The hot air duct 14 is connected with the roasting activation rotary cylinder 18 through a mechanical seal assembly I15, two sets of roller way assemblies 17 are embedded in the front and the back of the roasting activation rotary cylinder 18, the positioning frame is arranged on the carrier roller assembly 3 and can rotate around the central axis of the carrier roller assembly 3 by depending on the roller set 21 of the carrier roller assembly 3, the air separator 5 is connected with the roasting activation rotary cylinder 18 through a mechanical seal assembly II 20, and the inlets of the air separator 5 are designed to be three spiral inlets uniformly distributed along the circumferential direction.
The distributor 1 is arranged on the axial line of the hot air duct 14 and extends into the roasting and activating rotary cylinder 18, and the positioning frame 10 and the spiral blades 11 are positioned in the roasting and activating rotary cylinder 18.
The high-alumina ball stacking layer 19 is arranged in the roasting and activating rotary cylinder 18, and when the roasting and activating rotary cylinder 18 rotates around the central axis of the high-alumina ball stacking layer 18, the high-alumina ball stacking layer 19 continuously rolls under the action of the friction force of the wall of the roasting and activating rotary cylinder 18 and rubs mutually.
The circulating fluidized bed coal-fired furnace II comprises a cyclone separator 23, a hearth 24 and a material returning system 25, wherein the material returning system 25 comprises a material returning device 26 and a guide chamber 27, the material returning device 26 comprises a vertical pipe 28, a U-shaped valve 29 and a material returning pipe 30, and the guide chamber 27 comprises an air introducing port 31, a guide pipe 32, a negative pressure chamber 33 and a blowing chamber 34.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (1)

1. A roasting and rotating integrated furnace of a circulating fluidized bed is characterized in that: comprises a roasting activation rotary furnace and a circulating fluidized bed coal-fired furnace; the roasting activation rotary furnace comprises a distributor, a driving gear assembly, a carrier roller assembly, a roasting activation rotary furnace cylinder assembly and a winnowing machine; the distributor comprises a screw conveyor, an ejector, a cooling jacket, a diversion cone, a positioning frame, a spiral blade and a hot air channel, wherein the screw conveyor is connected with the ejector; the driving gear assembly comprises a transmission system and a driving gear, the transmission system is connected with the driving gear, and the transmission system is arranged on the base; the carrier roller assembly comprises a roller set and a base, and the roller set is arranged on the base; the roasting activation rotary furnace barrel component comprises a mechanical sealing component I, a ring gear, a roasting activation rotary barrel, a roller way component, a high-alumina ball stack layer and a mechanical sealing component II, wherein the ring gear is embedded on the roasting activation rotary barrel, the roasting activation rotary barrel is driven by a driving gear component to rotate around the central axis of the roasting activation rotary barrel, two groups of roller way components are embedded in the front and the back of the roasting activation rotary barrel, a positioning frame is arranged on a carrier roller component and can rotate around the central axis of the roasting activation rotary barrel by depending on the roller group of the carrier roller component, a winnowing device is connected with the roasting activation rotary barrel through the mechanical sealing component II, and the inlet of the winnowing device is designed into three spiral inlets which are uniformly distributed along the; the distributor is arranged on the central axis of the hot air duct and extends into the roasting and activating rotary cylinder body, the positioning frame and the spiral blades are positioned in the roasting and activating rotary cylinder body, the high-aluminum ball stack layer is placed in the roasting and activating rotary cylinder body, and when the roasting and activating rotary cylinder body rotates around the central axis of the roasting and activating rotary cylinder body, the high-aluminum ball stack layer continuously rolls and rubs with each other under the action of the friction force of the wall of the roasting and activating rotary cylinder body; the circulating fluidized bed coal-fired furnace comprises a cyclone separator, a hearth and a material returning system, wherein the material returning system comprises a material returning device and a guide chamber, the material returning device comprises a vertical pipe, a U-shaped valve and a material returning pipe, and the guide chamber comprises an air induction port, a guide pipe, a negative pressure chamber and an air blowing chamber.
CN201711451630.0A 2017-12-27 2017-12-27 Roasting and rotating integrated furnace of circulating fluidized bed Active CN108147799B (en)

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WO2002064526A1 (en) * 2001-02-12 2002-08-22 Alstom (Switzerland) Ltd Method of producing cement clinker and electricity
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CN102745925A (en) * 2012-07-20 2012-10-24 息烽捷浪建材开发有限公司 Rotary kiln for ardealite calcination
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CN107191925A (en) * 2017-07-21 2017-09-22 大同煤炭职业技术学院 A kind of CFBB and its abnormal method of adjustment of returning charge

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