CN202430018U - Device for producing high-temperature alumina with circulating fluidized bed roaster - Google Patents
Device for producing high-temperature alumina with circulating fluidized bed roaster Download PDFInfo
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Abstract
一种循环流化床焙烧炉生产高温氧化铝的装置，属于化工设备技术领域，包括文丘里闪速干燥器、收尘器、气力提升泵、初级旋风分离器、1级预热旋风分离器、2级预热旋风分离器、3级预热旋风分离器、循环流化床焙烧炉、高温旋风分离器和冷却系统，文丘里闪速干燥器的顶部出料口与收尘器的进料口连通，收尘器的出料口与气力提升泵的进料口连通，气力提升泵的顶部出料口与初级旋风分离器的进料口连通，初级旋风分离器的出料口与1级预热旋风分离器的进料口连通，1级预热旋风分离器的出料口与2级预热旋风分离器的进料口连通，2级预热旋风分离器的出料口与3级预热旋风分离器的进料口连通，3级预热旋风分离器的出料口与循环流化床焙烧炉的上进料口连通，循环流化床焙烧炉的出料口与高温旋风分离器的进料口连通；本实用新型的装置使加热的物料在气流中悬浮，热交换过程能够剧烈进行，物料的温度分布也更为均匀；热耗降低、焙烧更为均匀。
A device for producing high-temperature alumina in a circulating fluidized bed roaster, belonging to the technical field of chemical equipment, including a Venturi flash dryer, a dust collector, a pneumatic lift pump, a primary cyclone separator, a first-stage preheating cyclone separator, 2-stage preheating cyclone separator, 3-stage preheating cyclone separator, circulating fluidized bed roaster, high-temperature cyclone separator and cooling system, top outlet of Venturi flash dryer and inlet of dust collector The discharge port of the dust collector is connected with the feed port of the air lift pump, the top discharge port of the air lift pump is connected with the feed port of the primary cyclone separator, and the discharge port of the primary cyclone separator is connected with the primary cyclone separator. The feed port of the hot cyclone separator is connected, the discharge port of the first-stage preheating cyclone separator is connected with the feed port of the second-stage preheating cyclone separator, and the discharge port of the second-stage preheating cyclone separator is connected with the third-stage preheating cyclone separator. The feed port of the hot cyclone separator is connected, the discharge port of the 3-stage preheating cyclone separator is connected with the upper feed port of the circulating fluidized bed roaster, and the discharge port of the circulating fluidized bed roaster is connected with the high temperature cyclone separator The feed port of the utility model is connected; the device of the utility model makes the heated material suspended in the air flow, the heat exchange process can be carried out violently, and the temperature distribution of the material is also more uniform; the heat consumption is reduced, and the roasting is more uniform.
Description
Technical field
The utility model belongs to technical field of chemical, particularly a kind of device of circulating fluidized bed stoving oven production high temperature alumina.
Background technology
High temperature alumina is to be main raw material with the commercial alumina hydrate, is transformed through roasting dehydration, crystalline phase.The high temperature alumina outward appearance is white powder or fine sand shape, and mobile better stable performance is insoluble in the acid-base solution, is the ceramic of a kind of of many uses, excellent performance, price economy.Along with the swift and violent emergence of high-tech industry, the Application Areas of high temperature alumina has also obtained rapid expansion.High temperature alumina has fusing point height (2040 ℃), unreactiveness is strong and be used for refractory materials, refractory castable etc.; Have high-temp and high-strength, excellent electrical insulating property etc. and as the starting material of ceramics such as automobile spark plug, electronic substrates, cutter; Have characteristics such as good thermostability, high firmness, wear resistance are good and be mainly used in the raw materials for production of grinding, attrition resistant engineering machinery part and high alumina ceramic.Statistics shows that the market capacity that high temperature alumina is used for the non-metallurgy industry of ceramic material, wear-resistant material etc. accounts for about 25% of extraordinary aluminum oxide total amount, and application prospect is boundless.
It generally is that the white lake raw material is carried out roasting again through after the cooling cylinder cooling at a certain temperature through rotary kiln that high temperature alumina is produced, and obtains high temperature alumina, and rotary kiln belongs to the revolving drum kind equipment.Firebrick lining and heat-exchanger rig are arranged in the cylindrical shell, and with the low speed revolution, material and hot flue gas are generally countercurrent flow, and material added from high-end (the claiming cold junction or kiln tail end again) of kiln.Because cylindrical shell tilts to install, material is moving when circumferentially rolling vertically in the kiln when revolution, and burner sprays into fuel at low side (claiming hot junction or kiln hood end again), and flue gas is discharged by tail end; Material obtains heating in moving process, process physics and chemical transformation become specification product and draw off from low side.
Traditional way as the production high temperature alumina; Rotary kiln takes up an area of all relatively large in investment and construction; Hear rate is high; The defective of aspects such as maintenance cost is big, exhaust pollutant composition height no longer adapts to requirement energy-conservation under the new situation, that reduce discharging, lower consumption, thereby has restricted the development of high temperature alumina industry.
Summary of the invention
Go up the problem that exists to existing high temperature alumina preparation, the utility model provides a kind of device of circulating fluidized bed stoving oven production high temperature alumina.
The device of the circulating fluidized bed stoving oven production high temperature alumina of the utility model comprises Venturi flash dryer, dust-precipitator, air lift mud pump, elementary cyclonic separator, 1 grade of preheating cyclonic separator, 2 grades of preheating cyclonic separators, 3 grades of preheating cyclonic separators, circulating fluidized bed stoving oven, high temperature cyclone separator and cooling systems; The top discharge mouth of Venturi flash dryer is communicated with the opening for feed of dust-precipitator; The discharge port of dust-precipitator is communicated with the opening for feed of air lift mud pump; The top discharge mouth of air lift mud pump is communicated with the opening for feed of elementary cyclonic separator; The discharge port of elementary cyclonic separator is communicated with the opening for feed of 1 grade of preheating cyclonic separator, and the discharge port of 1 grade of preheating cyclonic separator is communicated with the opening for feed of 2 grades of preheating cyclonic separators, and the discharge port of 2 grades of preheating cyclonic separators is communicated with the opening for feed of 3 grades of preheating cyclonic separators; The discharge port of 3 grades of preheating cyclonic separators is communicated with the last opening for feed of circulating fluidized bed stoving oven; The discharge port of circulating fluidized bed stoving oven is communicated with the opening for feed of high temperature cyclone separator, and the sidepiece of circulating fluidized bed stoving oven is provided with first inlet mouth, and the bottom is provided with second inlet mouth; The high temperature cyclone separator bottom is provided with U type material returning device, and the returning charge leg of U type material returning device is communicated with the recycle feed mouth of circulating fluidized bed stoving oven, and the sealing leg of U type material returning device is communicated with cooling system.
In the said apparatus; The air outlet of elementary cyclonic separator is communicated with first inlet mouth of circulating fluidized bed stoving oven; The air outlet of 1 grade of preheating cyclonic separator is communicated with the inlet mouth of Venturi flash dryer; The air outlet of 2 grades of preheating cyclonic separators is communicated with the opening for feed of 1 grade of preheating cyclonic separator, and the air outlet of 3 grades of preheating cyclonic separators is communicated with the opening for feed of 2 grades of preheating cyclonic separators.
In the said apparatus, the opening for feed of Venturi flash dryer connects the outlet of screw feeder, and the import of screw feeder connects feed bin.
In the said apparatus, cooling system comprises 1 grade of cooling cyclonic separator, 2 grades of cooling cyclonic separators, 3 grades of cooling cyclonic separators, 4 grades of cooling cyclonic separators, 1 grade of fluidizing cooler and 2 grades of fluidizing coolers; The opening for feed of 1 grade of cooling cyclonic separator is communicated with the discharge port of high temperature cyclone separator; The discharge port of 1 grade of cooling cyclonic separator is communicated with the opening for feed of 2 grades of cooling cyclonic separators; The discharge port of 2 grades of cooling cyclonic separators is communicated with the opening for feed of 3 grades of cooling cyclonic separators; The discharge port of 3 grades of condensing surface cyclonic separators is communicated with the opening for feed of 4 grades of cooling cyclonic separators; The discharge port of 4 grades of cooling cyclonic separators is communicated with the opening for feed of 1 grade of fluidizing cooler, and the discharge port of 1 grade of fluidizing cooler is communicated with the opening for feed of 2 grades of fluidizing coolers.
In the said apparatus; The air outlet of 1 grade of cooling cyclonic separator is communicated with first inlet mouth of circulating fluidized bed stoving oven; The air outlet of 2 grades of cooling cyclonic separators is communicated with the opening for feed of 1 grade of cooling cyclonic separator; The air outlet of 3 grades of cooling cyclonic separators is communicated with the opening for feed of 2 grades of cooling cyclonic separators, and the air outlet of 4 grades of cooling cyclonic separators is communicated with the opening for feed of 3 grades of cooling cyclonic separators.
In the said apparatus; 1 grade of fluidizing cooler is provided with fluidized wind blast inlet, fluidized wind air outlet, air-cooled pipeline blast inlet and air-cooled pipeline air outlet; The fluidized wind air outlet of 1 grade of fluidizing cooler is communicated with the blast inlet of 4 grades of cooling cyclonic separators, and the air-cooled pipeline air outlet of 1 grade of fluidizing cooler is communicated with second blast inlet of circulating fluidized bed stoving oven; 2 grades of fluidizing coolers are provided with water-in, water outlet, fluidized wind air outlet and fluidized wind blast inlet, and the fluidized wind air outlet of 2 grades of fluidizing coolers is communicated with the blast inlet of 4 grades of cooling cyclonic separators.
The method of work of the device of the circulating fluidized bed stoving oven production high temperature alumina of the utility model is:
The white lake raw material that 1, will contain attached water places feed bin, is transferred in the Venturi flash dryer again, and the hot gas that transmits through 1 grade of preheating cyclonic separator carries out drying, forms water vapour and Aluminium Hydroxide; The hot gas flow velocity is 30 ~ 40m/s; The weight content of attached water is 5 ~ 8% in the white lake raw material;
2, Aluminium Hydroxide and water vapour carry out gas solid separation from the discharge port entering dust-precipitator of Venturi flash dryer, and the solid Aluminium Hydroxide is transferred to through air lift mud pump and carries out gas solid separation in the elementary cyclonic separator;
3, the isolated solid of elementary cyclonic separator is transferred to successively in 1 grade of preheating separator, 2 grades of preheating separators and 3 grades of preheating separators and is carried out preheating and gas solid separation; Be transferred at last in the circulating fluidized bed stoving oven; Feed warm air makes material be in fluidized state and carries out roasting from circulating fluidized bed stoving oven bottom; Material gets in the high temperature cyclone separator in company with air-flow and carries out the high temperature gas solid separation in the roasting process; Solid materials after the separation turns back to roasting once more in the circulating fluidized bed stoving oven through the returning charge leg of U type material returning device; Solid materials through after at least 5 circulations, is discharged the entering cooling system from the sealing leg of U type material returning device in circulating fluidized bed stoving oven and high temperature cyclone separator; White lake removes a water molecules and forms gamma-alumina in this process, becomes αYang Hualv through pyrolytic conversion again.
In the aforesaid method, the isolated gas of elementary cyclonic separator gets into the circulating fluidized bed stoving oven; 1 grade of isolated gas of preheating cyclonic separator gets into the Venturi flash dryer; 2 grades of isolated gases of preheating cyclonic separator get into 1 grade of preheating cyclonic separator; 3 grades of 2 grades of preheating cyclonic separators of gas entering that the preheating separator separates goes out; The isolated gas of high temperature cyclone separator gets into 3 grades of preheating cyclonic separators.
In the aforesaid method, get into 1 grade of cooling cyclonic separator, 2 grades of cooling cyclonic separators, 3 grades of cooling cyclonic separators and 4 grades of cooling cyclonic separators successively from the isolated solid materials of high temperature cyclone separator and cool off and gas solid separation; In 1 grade of fluidizing cooler, feed fluidization air, and in the air cooling pipeline of 1 grade of fluidizing cooler bubbling air; In the cooling water pipeline of 2 grades of fluidizing coolers, feed water, and feed fluidization air to 2 grades of fluidizing coolers; 4 grades of isolated cooling solid materials of cooling cyclonic separator get into 1 grade of fluidizing cooler; Under the fluidized wind effect, be fluidized state and carry out air cooling; Get into 2 grades of fluidizing coolers then, discharge after be lower than 80 ℃ through water-cooled being fluidized state under the fluidization air effect.
In the aforesaid method; Get into the circulating fluidized bed stoving oven from 1 grade of isolated gas of cooling cyclonic separator; Get into the opening for feed of 1 grade of cooling cyclonic separator from 2 grades of isolated gases of cooling cyclonic separator; Get into the opening for feed of 3 grades of cooling cyclonic separators from 3 grades of isolated gases of cyclonic separator, get into the opening for feed of 3 grades of cooling cyclonic separators from 4 grades of isolated gases of cooling cyclonic separator, bubbling air cools off in 4 grades of cooling cyclonic separators simultaneously.
In the aforesaid method, the fluidization air of from 1 grade of fluidizing cooler, discharging gets into 4 grades of cooling cyclonic separators, the air admission circulating fluidized bed stoving oven after interior being heated of discharging of the cooling duct of 1 grade of fluidizing cooler; 2 grades of 4 grades of cooling cyclonic separators of fluidizing agent entering that fluidizing cooler is discharged.
In the aforesaid method, the temperature when circulating fluidized bed stoving oven and high temperature cyclone separator circulate roasting is 1400 ± 50 ℃, and the residence time of solid materials in circulating fluidized bed stoving oven and high temperature cyclone separator is 20 ~ 30s; Temperature when 1 grade of preheating cyclonic separator, 2 grades of preheating cyclonic separators and 3 grades of preheating cyclonic separator separation of material is followed successively by 340 ± 10 ℃, 630 ± 50 ℃ and 1100 ± 50 ℃, and the temperature of Aluminium Hydroxide is controlled at 145 ± 10 ℃.
In the aforesaid method, the temperature when 1 grade of cooling cyclonic separator, 2 grades of cooling cyclonic separators, 3 grades of cooling cyclonic separators and 4 grades of cooling cyclonic separators cool off material is followed successively by 1320 ± 50 ℃, 1210 ± 50 ℃, 1050 ± 50 ℃ and 990 ± 50 ℃; 2 grades of fluidizing cooler drop temperatures are less than 80 ℃.
In the aforesaid method, weight content >=95% of αYang Hualv from the isolated solid materials of high temperature cyclone separator.
The device of the utility model adopts the method for fluosolids roasting; The material of heating is suspended in air-flow; The surface-area that hot gas flow contacts with particle increases greatly; The particulate all surface can obtain heating simultaneously, and heat exchanging process can acutely carry out, and the material of suspension just can obtain heating in a short period of time; Because the disturbance of material and air-flow is strong, material temperature distributes also more even simultaneously; Thereby with traditional technology mutually specific fuel consumption reduce more than 30%, roasting is more even; This device and method is compared the investment that needs with conventional art can save 15 ~ 20%, takes up an area of to be 1/5th of rotary kiln baking device, and can reduce environmental influence, and maintenance cost is merely 35% of rotary kiln; The device of the utility model flows material backward in the past, air from after forward with material countercurrent flow, material and air realization counterflow heat exchange in flow process; The heat that multistage cooling system reclaims aluminum oxide on the one hand is set, thereby warm-up combustion-supporting air reduces hear rate simultaneously, also be convenient to safety of products conveying and storage.
Description of drawings
Fig. 1 is the apparatus structure synoptic diagram of the circulating fluidized bed stoving oven production high temperature alumina among the utility model embodiment;
Among the figure 1, feed bin, 2, the Venturi flash dryer, 3, dust-precipitator, 4, air lift mud pump; 5, elementary cyclonic separator, 6,1 grades of preheating cyclonic separators, 7,2 grades of preheating cyclonic separators, 8,3 grades of preheating cyclonic separators; 9, circulating fluidized bed stoving oven, 10, high temperature cyclone separator, 11,1 grades of cooling cyclonic separators, 12,2 grades of cooling cyclonic separators; 13,3 grades of cooling cyclonic separators, 14,4 grades of cooling cyclonic separators, 15,1 grades of fluidizing coolers, 16,2 grades of fluidizing coolers; 17, cooling water pipeline, 18, air line, 19, U type material returning device.
Embodiment
The flow of the air lift mud pump that adopts among the utility model embodiment is 25t/h.
Dry moment accomplished when the white lake among the utility model embodiment in the entering Venturi flash dryer carried out drying by hot blast.
The solids concn of dust-precipitator discharging flue gas is≤50mg/Nm among the utility model embodiment
3
The air quantity that gets into 1 grade of fluidizing cooler air line among the utility model embodiment is 0.35N m with the gas-solid ratio that gets into the white lake in the Venturi flash dryer
3/ kg.
The air quantity that gets into 4 grades of cooling cyclonic separators among the utility model embodiment is 0.35N m with the gas-solid ratio that gets into the white lake in the Venturi flash dryer
3/ kg.
The fluidization air that gets into 1 grade of fluidizing cooler and 2 grades of level fluidizing coolers among the utility model embodiment is 0.25N m with the gas-solid ratio that gets into the white lake in the Venturi flash dryer
3/ kg.
Embodiment 1
The device of circulating fluidized bed stoving oven production high temperature alumina is as shown in Figure 1; Feed bin 1 outlet is communicated with Venturi flash dryer 2 through screw feeder; The top discharge mouth of Venturi flash dryer 2 is communicated with the opening for feed of dust-precipitator 3; The discharge port of dust-precipitator 3 is communicated with the opening for feed of air lift mud pump 4, and the top discharge mouth of air lift mud pump 4 is communicated with the opening for feed of elementary cyclonic separator 5, and the discharge port of elementary cyclonic separator 5 is communicated with the opening for feed of 1 grade of preheating cyclonic separator 6; The discharge port of 1 grade of preheating cyclonic separator 6 is communicated with the opening for feed of 2 grades of preheating cyclonic separators 7; The discharge port of 2 grades of preheating cyclonic separators 7 is communicated with the opening for feed of 3 grades of preheating cyclonic separators 8, and the discharge port of 3 grades of preheating cyclonic separators 8 is communicated with the last opening for feed of circulating fluidized bed stoving oven 9, and the discharge port of circulating fluidized bed stoving oven 9 is communicated with the opening for feed of high temperature cyclone separator 10; The sidepiece of circulating fluidized bed stoving oven 9 is provided with first inlet mouth, and the bottom is provided with second inlet mouth;
The air outlet of elementary cyclonic separator 5 is communicated with first inlet mouth of circulating fluidized bed stoving oven 9; The air outlet of 1 grade of preheating cyclonic separator 6 is communicated with the inlet mouth of Venturi flash dryer 2; The air outlet of 2 grades of preheating cyclonic separators 7 is communicated with the opening for feed of 1 grade of preheating cyclonic separator 6, and the air outlet of 3 grades of preheating cyclonic separators 7 is communicated with the opening for feed of 2 grades of preheating cyclonic separators 6;
High temperature cyclone separator 10 bottoms are provided with U type material returning device 19, and the returning charge leg of U type material returning device 19 is communicated with the recycle feed mouth of circulating fluidized bed stoving oven 9, and the sealing leg of U type material returning device 19 is communicated with the opening for feed of 1 grade of cooling cyclonic separator 11;
The discharge port of 1 grade of cooling cyclonic separator 11 is communicated with the opening for feed of 2 grades of cooling cyclonic separators 12; The discharge port of 2 grades of cooling cyclonic separators 12 is communicated with the opening for feed of 3 grades of cooling cyclonic separators 13; The discharge port of 3 grades of condensing surface cyclonic separators 13 is communicated with the opening for feed of 4 grades of cooling cyclonic separators 14; The discharge port of 4 grades of cooling cyclonic separators 14 is communicated with the opening for feed of 1 grade of fluidizing cooler 15, and the discharge port of 1 grade of fluidizing cooler 15 is communicated with the opening for feed of 2 grades of fluidizing coolers 16;
The air outlet of 1 grade of cooling cyclonic separator 11 is communicated with first inlet mouth of circulating fluidized bed stoving oven 9; The air outlet of 2 grades of cooling cyclonic separators 12 is communicated with the opening for feed of 1 grade of cooling cyclonic separator 11; The air outlet of 3 grades of cooling cyclonic separators 13 is communicated with the opening for feed of 2 grades of cooling cyclonic separators 12, and the air outlet of 4 grades of cooling cyclonic separators 14 is communicated with the opening for feed of 3 grades of cooling cyclonic separators 13;
1 grade of fluidizing cooler 15 is provided with fluidized wind blast inlet, fluidized wind air outlet, cooling duct blast inlet and cooling duct air outlet; The fluidisation air outlet is communicated with the blast inlet of 4 grades of cooling cyclonic separators 14, and the cooling duct air outlet is communicated with second inlet mouth of circulating fluidized bed stoving oven 9;
2 grades of fluidizing coolers 16 are provided with water-in, water outlet, fluidized wind air outlet and fluidized wind blast inlet, and the fluidized wind air outlet is communicated with the blast inlet of 4 grades of cooling cyclonic separators 14;
Method of work is:
The white lake raw material that will contain attached water places feed bin, is transferred in the Venturi flash dryer again, and the hot gas that transmits through 1 grade of preheating cyclonic separator carries out drying, forms water vapour and Aluminium Hydroxide; The hot gas flow velocity is 30m/s; The weight content of attached water is 5% in the white lake raw material;
Aluminium Hydroxide and water vapour carry out gas solid separation from the discharge port entering dust-precipitator of Venturi flash dryer, the solid Aluminium Hydroxide is transferred to through air lift mud pump and carries out gas solid separation in the elementary cyclonic separator;
The isolated solid of elementary cyclonic separator is transferred in 1 grade of preheating separator, 2 grades of preheating separators and 3 grades of preheating separators successively carries out preheating and gas solid separation; Be transferred at last in the circulating fluidized bed stoving oven; Feed warm air makes material be in fluidized state and carries out roasting from circulating fluidized bed stoving oven bottom; Material gets in the high temperature cyclone separator in company with air-flow and carries out the high temperature gas solid separation in the roasting process; Solid materials after the separation turns back to roasting once more in the circulating fluidized bed stoving oven through U type material returning device; Solid materials through after 5 circulations, is discharged the entering cooling system from U type material returning device in circulating fluidized bed stoving oven and high temperature cyclone separator; White lake removes a water molecules and forms gamma-alumina in this process, becomes αYang Hualv through pyrolytic conversion again;
The isolated gas of elementary cyclonic separator gets into the circulating fluidized bed stoving oven; 1 grade of isolated gas of preheating cyclonic separator gets into the Venturi flash dryer; 2 grades of isolated gases of preheating cyclonic separator get into 1 grade of preheating cyclonic separator; 3 grades of 2 grades of preheating cyclonic separators of gas entering that the preheating separator separates goes out; The isolated gas of high temperature cyclone separator gets into 3 grades of preheating cyclonic separators;
The solid materials of discharging from U type material returning device gets into 1 grade of cooling cyclonic separator, 2 grades of cooling cyclonic separators, 3 grades of cooling cyclonic separators and 4 grades of cooling cyclonic separators successively and cools off and gas solid separation; In 1 grade of fluidizing cooler, feed fluidization air, and in the air line of 1 grade of fluidizing cooler bubbling air; In the cooling water pipeline of 2 grades of fluidizing coolers, feed water, and feed fluidization air to 2 grades of fluidizing coolers; 4 grades of isolated cooling solid materials of cooling cyclonic separator get into 1 grade of fluidizing cooler; Under the fluidization air effect, be fluidized state and carry out air cooling; Get into 2 grades of fluidizing coolers then, discharge after be lower than 80 ℃ through water-cooled being fluidized state under the fluidization air effect;
Get into the circulating fluidized bed stoving oven from 1 grade of isolated gas of cooling cyclonic separator; Get into the opening for feed of 1 grade of cooling cyclonic separator from 2 grades of isolated gases of cooling cyclonic separator; Get into the opening for feed of 3 grades of cooling cyclonic separators from 3 grades of isolated gases of cyclonic separator; Get into the opening for feed of 3 grades of cooling cyclonic separators from 4 grades of isolated gases of cooling cyclonic separator, bubbling air cools off in 4 grades of cooling cyclonic separators simultaneously;
The fluidization air of from 1 grade of fluidizing cooler, discharging gets into 4 grades of cooling cyclonic separators, the air admission circulating fluidized bed stoving oven after the air of discharging in the cooling duct of 1 grade of fluidizing cooler is heated; 2 grades of 4 grades of cooling cyclonic separators of fluidizing agent entering that fluidizing cooler is discharged;
The maturing temperature of circulating fluidized bed stoving oven and the temperature of high temperature cyclone separator are 1400 ± 50 ℃, and the residence time of solid materials in circulating fluidized bed stoving oven and high temperature cyclone separator is 20s; Temperature when 1 grade of preheating cyclonic separator, 2 grades of preheating cyclonic separators and 3 grades of preheating cyclonic separator separation of material is followed successively by 340 ± 10 ℃, 630 ± 50 ℃ and 1100 ± 50 ℃, and the temperature of Aluminium Hydroxide is controlled at 145 ± 10 ℃;
Temperature when 1 grade of cooling cyclonic separator, 2 grades of cooling cyclonic separators, 3 grades of cooling cyclonic separators and 4 grades of cooling cyclonic separators cool off material is followed successively by 1320 ± 50 ℃, 1210 ± 50 ℃, 1050 ± 50 ℃ and 990 ± 50 ℃; 2 grades of fluidizing cooler drop temperatures are 70 ℃;
The weight content 95% of αYang Hualv from the isolated solid materials of high temperature cyclone separator.
Embodiment 2
The device of circulating fluidized bed stoving oven production high temperature alumina is with embodiment 1;
Method of work is with embodiment 1; Difference is: the hot gas flow velocity is 35m/s; The weight content of attached water is 6% in the white lake raw material; Solid materials circulates through 6 times in circulating fluidized bed stoving oven and high temperature cyclone separator; The residence time of solid materials in circulating fluidized bed stoving oven and high temperature cyclone separator is 25s; 2 grades of fluidizing cooler drop temperatures are 75 ℃; The weight content 96% of αYang Hualv from the isolated solid materials of high temperature cyclone separator.
Embodiment 3
The device of circulating fluidized bed stoving oven production high temperature alumina is with embodiment 1;
Method of work is with embodiment 1; Difference is: the hot gas flow velocity is 40m/s; The weight content of attached water is 8% in the white lake raw material; Solid materials circulates through 7 times in circulating fluidized bed stoving oven and high temperature cyclone separator; The residence time of solid materials in circulating fluidized bed stoving oven and high temperature cyclone separator is 30s; 2 grades of fluidizing cooler drop temperatures are 75 ℃; The weight content 97% of αYang Hualv from the isolated solid materials of high temperature cyclone separator.
Claims (3)
1. the device of a circulating fluidized bed stoving oven production high temperature alumina is characterized in that comprising Venturi flash dryer, dust-precipitator, air lift mud pump, elementary cyclonic separator, 1 grade of preheating cyclonic separator, 2 grades of preheating cyclonic separators, 3 grades of preheating cyclonic separators, circulating fluidized bed stoving oven, high temperature cyclone separator and cooling systems;
The top discharge mouth of Venturi flash dryer is communicated with the opening for feed of dust-precipitator; The discharge port of dust-precipitator is communicated with the opening for feed of air lift mud pump; The top discharge mouth of air lift mud pump is communicated with the opening for feed of elementary cyclonic separator; The discharge port of elementary cyclonic separator is communicated with the opening for feed of 1 grade of preheating cyclonic separator, and the discharge port of 1 grade of preheating cyclonic separator is communicated with the opening for feed of 2 grades of preheating cyclonic separators, and the discharge port of 2 grades of preheating cyclonic separators is communicated with the opening for feed of 3 grades of preheating cyclonic separators; The discharge port of 3 grades of preheating cyclonic separators is communicated with the last opening for feed of circulating fluidized bed stoving oven; The discharge port of circulating fluidized bed stoving oven is communicated with the opening for feed of high temperature cyclone separator, and the sidepiece of circulating fluidized bed stoving oven is provided with first inlet mouth, and the bottom is provided with second inlet mouth;
The high temperature cyclone separator bottom is provided with U type material returning device, and the returning charge leg of U type material returning device is communicated with the recycle feed mouth of circulating fluidized bed stoving oven, and the sealing leg of U type material returning device is communicated with cooling system.
2. the device of circulating fluidized bed stoving oven production high temperature alumina according to claim 1; The air outlet that it is characterized in that described elementary cyclonic separator is communicated with first inlet mouth of circulating fluidized bed stoving oven; The air outlet of 1 grade of preheating cyclonic separator is communicated with the inlet mouth of Venturi flash dryer; The air outlet of 2 grades of preheating cyclonic separators is communicated with the opening for feed of 1 grade of preheating cyclonic separator, and the air outlet of 3 grades of preheating cyclonic separators is communicated with the opening for feed of 2 grades of preheating cyclonic separators.
3. based on the device of the described recirculating fluidized bed roaster of claim 1 production high temperature alumina; It is characterized in that described cooling system comprises 1 grade of cooling cyclone separator; 2 grades of cooling cyclone separators, 3 grades of cooling cyclone separators, 4 grades of cooling cyclone separators, 1 grade of fluidizing cooler and 2 grades of fluidizing coolers; The charging aperture of 1 grade of cooling cyclone separator is communicated with the discharging opening of high temperature cyclone separator; The discharging opening of 1 grade of cooling cyclone separator is communicated with the charging aperture of 2 grades of cooling cyclone separators; The discharging opening of 2 grades of cooling cyclone separators is communicated with the charging aperture of 3 grades of cooling cyclone separators; The discharging opening of 3 grades of condenser cyclone separators is communicated with the charging aperture of 4 grades of cooling cyclone separators; The discharging opening of 4 grades of cooling cyclone separators is communicated with the charging aperture of 1 grade of fluidizing cooler, and the discharging opening of 1 grade of fluidizing cooler is communicated with the charging aperture of 2 grades of fluidizing coolers.
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| CN201120542068.4U CN202430018U (en) | 2011-12-22 | 2011-12-22 | Device for producing high-temperature alumina with circulating fluidized bed roaster |
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| CN201120542068.4U CN202430018U (en) | 2011-12-22 | 2011-12-22 | Device for producing high-temperature alumina with circulating fluidized bed roaster |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495195A (en) * | 2016-12-05 | 2017-03-15 | 沈阳鑫博工业技术股份有限公司 | A kind of multifunctional roasting device and control method |
| CN106542556A (en) * | 2016-11-03 | 2017-03-29 | 沈阳鑫博工业技术股份有限公司 | A kind of composite drying of aluminum oxide and calciner and method |
| CN106568331A (en) * | 2016-10-19 | 2017-04-19 | 中冶焦耐(大连)工程技术有限公司 | A large-scale suspension kiln and its production process |
-
2011
- 2011-12-22 CN CN201120542068.4U patent/CN202430018U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568331A (en) * | 2016-10-19 | 2017-04-19 | 中冶焦耐(大连)工程技术有限公司 | A large-scale suspension kiln and its production process |
| CN106568331B (en) * | 2016-10-19 | 2018-08-21 | 中冶焦耐(大连)工程技术有限公司 | A large-scale suspension kiln and its production process |
| CN106542556A (en) * | 2016-11-03 | 2017-03-29 | 沈阳鑫博工业技术股份有限公司 | A kind of composite drying of aluminum oxide and calciner and method |
| CN106495195A (en) * | 2016-12-05 | 2017-03-15 | 沈阳鑫博工业技术股份有限公司 | A kind of multifunctional roasting device and control method |
| CN106495195B (en) * | 2016-12-05 | 2017-09-05 | 沈阳鑫博工业技术股份有限公司 | A kind of multifunctional roasting device and control method |
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