CN102180604B - Spinning bed equipment and process for producing high-activity lime with spinning bed - Google Patents
Spinning bed equipment and process for producing high-activity lime with spinning bed Download PDFInfo
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- CN102180604B CN102180604B CN201010587494XA CN201010587494A CN102180604B CN 102180604 B CN102180604 B CN 102180604B CN 201010587494X A CN201010587494X A CN 201010587494XA CN 201010587494 A CN201010587494 A CN 201010587494A CN 102180604 B CN102180604 B CN 102180604B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention relates to a process and equipment for producing high-activity lime. By using the process, the layering distribution of lime with small, middle and large particle sizes is achieved, the occurrence of overburning and underfiring is effectively prevented, underfiring rate is less than 0.5%, and the activity of the lime is improved to 380-400 ml. By using the spinning bed technology, the amount of lime product powder produced by conventional equipment is reduced from 12-30% to 1.0-3.0%, and the daily yield reaches 1000-3000 tons, thereby achieving high-efficiency high-quality production of the lime; and spinning bed high-temperature smoke is used for pr-heating the lime, high-temperature lime heat is use for pre-heating combustion air, and system heat is effectively and comprehensively utilized. According to the invention, comprehensive energy consumption is low, production cost is low, and economic and social benefits are obvious.
Description
Technical field
The present invention relates to the production technique of lime, relate in particular to a kind of producing and manufacturing technique and equipment that rotates height of bed activity lime.
Background technology
Lime is widely used in the industrial circles such as ferrous metallurgy, nonferrous metallurgy, calcium carbide production, chemical industry, to the higher specification of quality of the continuous proposition of the quality of lime.The technology and equipment of lime production mainly contains telescopic shaft furnace, grate rotary kiln, co-current heat accumulated kiln with double shafts, two D kiln, beam type burner shaft furnace, suspension kiln, CID kiln etc. at present.Chinese patent application 200810017556.6 discloses a kind of for the production of the raw material of high-quality calcium carbide, the large-scale energy-saving gas burning kiln of high-quality lime, adopts a kind of pallet car type elongated horizontal kiln.Chinese patent application 200910086155.0 discloses a kind of sintering technology of quickened lime, adopts multistage cyclone pre-heating system, decomposing furnace and multistage cyclone water cooler in interior preheating---the suspension calcining device, and for the production of lime powder.Chinese patent application 200710054579.X discloses a kind of stepped active lime shaft kiln and calcining process thereof, stops 3-5 hour at 700～800 ℃, stops 2-3 hour under 1250～1300 ℃ of temperature, and production efficiency is low.Chinese patent application 200810231028.0 discloses a kind of closed type calcium carbide furnace tail gas carries out active lime calcination with fuel as rotary kiln method, is the calcium carbide stove exhaust behind the cooling and purifying and coke powder or coal dust are sent into rotary kiln.Chinese patent application 201010232611.0 discloses a kind of active lime production plant, relates to a kind of take the active lime production plant of coal dust as the fuel turnaround kiln.Chinese patent application 200420087429.0 discloses a kind of active lime shaft kiln equipment that utilizes coke.Chinese patent application 200420120497.2 discloses a kind of gas and has burnt active lime shaft kiln equipment.
There is following defective in existing kiln: (1) can't realize that the same stove of little middle large size Wingdale fires, and quality is inhomogeneous.(2) lime is given birth to burning rate 3～14%, can't produce birth burning rate less than the industrial lime of 1% high quality, lime activity 270～380ml, and quality fluctuation is large.(3) the lime product powder is up to 12～30%.(4) day output only has 300～1000 tons, and maximum day output only has 1000 tons, can't realize more scale operation, and production efficiency is low, comprehensive energy consumption is high.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes a kind of rotating bed equipment and rotating bed and produce the producing and manufacturing technique of high activity lime, solved in the present lime production to give birth to and burnt or burning is difficult to control, the lime activity fluctuation is large, production efficiency is low, percentage of damage is high, the high problem of high, the comprehensive finished product energy consumption of lime powder content, produce 1000～3000 tons in high activity lime a set of equipment day, give birth to the burning rate less than 0.5%, activity 380～400ml, powder is less than 3.0%.
A kind of rotating bed equipment comprises ore preheater (3), distributor (5), vibratory screening apparatus (6), rotating bed (12) and cooling system; Ore preheater (3) links to each other with distributor (5), and distributor (5) links to each other with rotating bed (12) from top to bottom through vibratory screening apparatus (6); Rotating bed (12) links to each other with cooling system.
Preferably, described rotating bed equipment also comprises charging equipment.Charging equipment links to each other with ore preheater (3), and is ore preheater (3) convey materials.The preferred rotary conveyor of described charging equipment (1), or the equipment such as chapelet.
Preferably, described rotating bed equipment also comprises ore storage bunker (2), and ore storage bunker (2) is positioned at ore preheater (3) top and is connected with ore preheater (3); The material that charging equipment is carried enters ore preheater (3) through ore storage bunker (2).
Preferably, described rotating bed equipment also comprises the lime cooling system, waste gas dedusting system, gas burning system.
Preferably, described rotating bed (12) is comprised of cloth district (7), heating zone (8), high-temperature zone (9), soaking zone (10) and discharge zone (11).Cloth district (7), heating zone (8), high-temperature zone (9), soaking zone (10) and discharge zone (11) join end to end successively.Vibratory screening apparatus (6) is installed in the top of cloth district (7).
Preferably, rotating bed (12) bed surface is comprised of refractory materials, and refractory materials divides three layers, and the bottom is that light fire brick, middle part are that clay brick, upper surface are high alumina bricks.
Preferably, described rotating bed equipment also comprises high-temperature flue gas pipeline (4), and high-temperature flue gas pipeline (4) two ends link to each other with the soaking zone (10) of ore preheater (3) and rotating bed (12) respectively.
Preferably, described cooling system comprises: discharging machine (13), water cooler (14), air preheater (15), combustion air pipeline (16), burner blower (17), exhaust pipeline (18).Discharging machine (13) is installed on rotating bed (12) bed surface, and the discharge end of discharging machine (13) links to each other with the upper end of water cooler (14); One end of air preheater (15) links to each other with water cooler (14) top by pipeline, the hot gas introducing air preheater (15) in the water cooler (14), air preheater (15) the other end links to each other with flue (19) by exhaust pipeline (18), and waste gas is taken away; Burner blower (17) links to each other with air preheater (15) freezing air is sent into air preheater (15) preheating, combustion air pipeline (16) two ends link to each other with rotating bed (12) with air preheater (15) respectively, and preheated air is sent into rotating bed (12).
Preferably, described discharging machine is water-cooled push rod discharging machine, or the water-cooling spiral discharging machine.Preferred described water cooler (14) is shaft cooler, or chain grate formula water cooler.Preferred air preheater (15) is tubular air preheater, or the Clothoid type air preheater.
Preferably, described waste gas dedusting system comprises: exhaust pipeline (18), flue (19), fly-ash separator (20), dedusting fan (21) and smoke discharging pipe (22).Exhaust pipeline (18) is connected with flue (19), flue (19) two ends link to each other with ore preheater (3) with fly-ash separator (20) respectively, and dedusting fan (21) two ends link to each other with smoke discharging pipe (22) with fly-ash separator (20) respectively.
Preferably, described gas burning system comprises: gas pipeline (23) and fuel cartridge (24).Fuel cartridge (24) through gas pipeline (23) and rotating bed (12) with link to each other, be rotating bed supply combustion gas.
The present invention also provides a kind of rotating bed to produce the processing method of high activity lime, it is characterized in that, and be granularity that 10～60mm Wingdale is preheating to 800～900 ℃ through the ore preheater, send into rotating bed; In rotating bed, Wingdale is rapidly heated to 1000～1200 ℃ of high temperature fast decoupleds, 900～1100 ℃ of soaking reach fully and decompose, and then is cooled to 80～100 ℃ through water cooler and obtains high activity, the industrial lime of high purity high-quality.
The invention provides a kind of producing and manufacturing technique that rotates height of bed activity lime, comprise the steps:
1) Wingdale is directly sent into the ore preheater through charging equipment; Or send into ore storage bunker, send into the ore preheater through ore storage bunker;
2) ore preheater be used to the to spin high-temperature flue gas preheating Wingdale to 800 of rotated bed～900 ℃;
3) Wingdale after the preheating is isolated small powder, middle material, aniseed through distributor, vibratory screening apparatus, and three layers of cloth are on the bed surface of rotating bed;
4) burning of fuel and combustion air provides heat for rotating bed, and Wingdale through cloth district, heating zone, high-temperature zone, soaking zone and discharge zone, obtains the industrial lime of high activity high-quality at rotating bed;
5) high temperature lime outputs to water cooler by discharging machine, and high temperature lime is used to warm-up combustion-supporting air in water cooler, be quickly cooled to simultaneously 80～100 ℃ after by water cooler bottom output; The rotating bed high-temperature flue gas is sent to the ore preheater and is used for the preheating Wingdale, and heat obtains the high efficiente callback utilization.
Preferably, step 1) described limestone granularity is 10～60mm.
Preferably, step 2) described ore preheater is vertical ore preheater, or chain grate formula ore preheater etc.Preferred described rotating bed is rotary hearth continous furnance, or other form rotating bed.
Preferably, step 2) described high-temperature flue gas is from rotating bed, and temperature is 1000～1100 ℃, and high-temperature flue gas carries out heat exchange with Wingdale in the ore preheater, Wingdale is preheating to 800～900 ℃, and spent air temperture drops to 200～240 ℃ and is sent to the fly-ash separator dedusting.
Preferably, step 3) the Wingdale small powder granularity 5～15mm after the described preheating, middle material granularity be greater than 15mm less than 30mm, large material granularity 30～60mm.Preferably, described three layers of cloth, namely the bottom of the rotating bed bed surface bed of material is that the middle part of small powder, the bed of material is that the top of middle material, the bed of material is aniseed.
Preferably, step 4) described gas-burning or coal dust.Described inflammable gas is selected from furnace of calcium carbide coal gas, blast furnace gas, coal gas of converter, coke-oven gas or Sweet natural gas.
Preferred rotating bed bed surface is made of 850～1000 ℃ of the bed surface temperature of cloth district and discharge zone, 1000～1100 ℃ of heating zone furnace gas temperatures, 1150～1300 ℃ of high-temperature zone furnace gas temperatures, 1000～1100 ℃ of soaking zone furnace gas temperatures refractory materials.
In the ore preheater, be preheating to 800～900 ℃ Wingdale, by the even cloth of distributor to vibratory screening apparatus, the small powder 60～70% of granularity 5～15mm has decomposed, cloth is on bed surface after the screening of small powder process, it is the bottom of the bed of material, on the one hand because the bed surface refractory materials remains at 850～1000 ℃ temperature undecomposed small powder is decomposed fully, middle material and the top aniseed at bed of material middle part can prevent effectively that small powder is in the high-temperature zone burning on the other hand.According to small powder, middle material, three layers of cloth of aniseed, Wingdale is through heating zone, high-temperature zone, soaking zone, the aniseed on bed of material surface is fully decomposed, and the middle material at bed of material middle part obtains high activity, the industrial lime of high purity high-quality thus owing to there being the existence of soaking zone also to obtain abundant decomposition.
Preferably, step 5) described discharging machine outputs to water cooler to high temperature lime (950～1000 ℃), the room temperature freezing air is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, the high-temp waste gas that forms to water cooler top reaches 700～900 ℃ and enters exchanging air, in air preheater the freezing air from burner blower is preheating to 400～600 ℃ and is sent to the rotating bed combustion fuel, waste gas is sent to fly-ash separator by exhaust pipeline; High temperature lime is from top to bottom motion in water cooler, to less than after 80～100 ℃, is delivered to lime finished bin by rotary conveyor by Rapid cooling in the air.
Preferably, this equipment and process method also is used for light dolomite.With rhombspar at 950～1000 ℃ of mixtures that are sintered into CaO and MgO.Size of Dolomite 10～60mm, be transported to ore storage bunker 2 by rotary conveyor 1, high-temperature flue-gas from rotating bed is 900～1000 ℃, high-temperature flue gas carries out heat exchange with rhombspar in vertical ore preheater, rhombspar is preheating to 700～800 ℃, spent air temperture drops to 150～200 ℃, is sent to fly-ash separator 17 dedustings by flue 16.
Less than 30mm, large material granularity 30～60mm divides on three layers of cloth rotating bed bed surface greater than 15mm for rhombspar small powder granularity 5～15mm after the preheating, middle material granularity, and the bottom of the bed of material is small powder, and the middle part of the bed of material is middle material, and the top of the bed of material is aniseed.
The rotating bed bed surface is comprised of refractory materials, 850～950 ℃ of bed surface temperature, 900～950 ℃ of heating zone furnace gas temperatures, 1000～1100 ℃ of high-temperature zone furnace gas temperatures, 1000～1050 ℃ of soaking zone furnace gas temperatures.
Discharging machine outputs to water cooler to light dolomite (900～1000 ℃), air at room temperature is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, and the high-temp waste gas that forms to water cooler top is preheating to 400～600 ℃ to the combustion air from burner blower through air preheater and is sent to the rotating bed combustion fuel; Light dolomite is from top to bottom motion in water cooler, by behind Rapid cooling in the air to 80～100 ℃, delivers to the light dolomite finished bin by rotary conveyor.
Advantage of the present invention is embodied in:
(1) realized little, in, the layer-by-layer distribution of different size granularity Wingdale, effectively prevented the burning of small size Wingdale, and the large size Wingdale is given birth to the problem of burning and is occured, and gives birth to the burning rate less than 0.5%, makes the activity of lime bring up to 380～400ml.
(2) application of rotating bed technology makes the lime product chip index drop to 1～3.0% by 12～30% of conventional equipment, and day output reaches 1000～3000 tons, realizes high-level efficiency, the high quality of production of lime.
(3) the rotating bed high-temperature flue gas is used for the preheating Wingdale, and high temperature lime heat is used for warm-up combustion-supporting air, and system thermal obtains high-efficiency comprehensive utilization, and comprehensive energy consumption is low, and production cost is low, and economic benefit and social benefit are remarkable.
Description of drawings
Fig. 1 is block diagram of the present invention.Wherein: 1: rotary conveyor, 2: ore storage bunker, 3: ore preheater, 4: the high-temperature flue gas pipeline, 5: distributor, 6: vibratory screening apparatus, 7: cloth district, 8: the heating zone, 9: high-temperature zone, 10: soaking zone, 11: discharge zone, 12: rotating bed, 13: discharging machine, 14: water cooler, 15: air preheater, 16: the combustion air pipeline, 17: burner blower, 18: exhaust pipeline, 19: flue, 20: fly-ash separator, 21: dedusting fan, 22: smoke discharging pipe, 23: gas pipeline, 24: fuel cartridge.
Embodiment
Following examples are to further specify of the present invention, but the present invention is not limited thereto.
Described lime activity according to standard DIN EN 13971-2008 (the carbonate lime material. activity determination. the hydrochloric acid potentiometric titration) method measures, lime product chip index granularity is measured according to standard GB/T2007.7 method less than the lime weight percent of 5mm, and lime product is given birth to burning rate weight percent and measured according to standard GB/T 3286.8 methods.
Embodiment 1:
A kind of production unit that rotates height of bed activity lime of the present invention is seen Fig. 1, comprises rotary conveyor 1, ore storage bunker 2, ore preheater 3, high-temperature flue gas pipeline 4, distributor 5, vibratory screening apparatus 6, rotating bed 12, lime cooling system, waste gas dedusting system, gas burning system.Rotary conveyor 1 links to each other with ore storage bunker 2; Ore preheater 3 tops link to each other with ore storage bunker 2, and the bottom links to each other with distributor 5; Distributor 5 links to each other with vibratory screening apparatus 6; Vibratory screening apparatus 6 links to each other with rotating bed 12; High-temperature flue gas pipeline 4 two ends link to each other with rotating bed 12 with ore preheater 3 respectively.
The lime cooling system comprises: discharging machine 13, water cooler 14, air preheater 15, combustion air pipeline 16, burner blower 17, exhaust pipeline 18.Discharging machine 13 is installed on rotating bed 12 bed surfaces, and discharge end links to each other with water cooler 14; One end of air preheater 15 links to each other with water cooler 14 tops by pipeline, and the hot gas introducing air preheater 15 in the water cooler 14, air preheater 15 the other ends link to each other with flue 19 by exhaust pipeline 18, and waste gas is taken away; Burner blower 17 links to each other with air preheater 15 freezing air is sent into air preheater 15 preheatings, and combustion air pipeline 16 two ends link to each other with rotating bed 12 with air preheater 15 respectively, and preheated air is sent into rotating bed 12.
The waste gas dedusting system comprises: exhaust pipeline 18, flue 19, fly-ash separator 20, dedusting fan 21 and smoke discharging pipe 22.Exhaust pipeline 18 is connected with flue 19, and flue 19 two ends link to each other with ore preheater 3 with fly-ash separator 20 respectively, and dedusting fan 21 two ends link to each other with smoke discharging pipe 22 with fly-ash separator 20 respectively.
Gas burning system comprises: gas pipeline 23 and fuel cartridge 24.Gas pipeline 23 two ends link to each other with fuel cartridge 24 with rotating bed 12 respectively, are rotating bed supply combustion gas.
Limestone granularity is 10～60mm.Fuel is furnace of calcium carbide coal gas.
The ore preheater adopts vertical ore preheater, and rotating bed is rotary hearth continous furnance, and discharging machine adopts water-cooled push rod discharging machine, states water cooler and adopts shaft cooler.Air preheater is tubular air preheater.
Wingdale is transported to ore storage bunker 2 by rotary conveyor 1, high-temperature flue-gas from rotating bed is 1000～1100 ℃, high-temperature flue gas carries out heat exchange with Wingdale in vertical ore preheater, Wingdale is preheating to 800～900 ℃, spent air temperture drops to 200～240 ℃, is sent to fly-ash separator 20 dedustings by flue 19.
Less than 30mm, large material granularity 30～60mm divides on three layers of cloth rotating bed bed surface greater than 15mm for Wingdale small powder granularity 5～15mm after the preheating, middle material granularity, and the bottom of the bed of material is small powder, and the middle part of the bed of material is middle material, and the top of the bed of material is aniseed.
The rotating bed bed surface is comprised of refractory materials, 850～1000 ℃ of bed surface temperature, 1000～1100 ℃ of heating zone furnace gas temperatures, 1150～1300 ℃ of high-temperature zone furnace gas temperatures, 1000～1100 ℃ of soaking zone furnace gas temperatures.In the ore preheater, be preheating to 800～900 ℃ Wingdale by the even cloth of distributor on vibratory screening apparatus, the small powder 60～70% of granularity 5～15mm has decomposed, cloth is on bed surface after the screening of small powder process, it is the bottom of the bed of material, on the one hand because the bed surface refractory materials remains at 850～1000 ℃ temperature undecomposed small powder is decomposed fully, middle material and the top aniseed at bed of material middle part can prevent effectively that small powder is in the high-temperature zone burning on the other hand.According to small powder, middle material, three layers of cloth of aniseed, Wingdale is through heating zone, high-temperature zone, soaking zone, the aniseed on bed of material surface is fully decomposed, and the middle material at bed of material middle part obtains high activity, the industrial lime of high purity high-quality thus owing to there being the existence of soaking zone also to obtain abundant decomposition.
Discharging machine outputs to water cooler to high temperature lime (950～1050 ℃), the room temperature freezing air is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, the high-temp waste gas that forms to water cooler top reaches 700～900 ℃ and enters exchanging air, in air preheater the freezing air from burner blower is preheating to 400～600 ℃ and is sent to the rotating bed combustion fuel, waste gas is sent to fly-ash separator by exhaust pipeline; High temperature lime is from top to bottom motion in water cooler, to less than after 80～100 ℃, is delivered to lime finished bin by rotary conveyor by Rapid cooling in the air.
The activity of lime finished product is 395～400ml, and chip index 1.2% is given birth to burning 0.2%.
Embodiment 2:
A kind of production unit that rotates height of bed activity lime of the present invention, ore preheater 3 adopt chain grate formula ore preheater, and discharging machine 13 adopts the water-cooling spiral discharging machine, and air preheater is the Clothoid type air preheater.Other apparatus embodiments 1.
Fuel adopts blast furnace gas.
Wingdale is transported to ore storage bunker 2 by rotary conveyor 1, high-temperature flue-gas from rotating bed is 1000～1100 ℃, high-temperature flue gas carries out heat exchange with Wingdale in chain grate formula ore preheater, Wingdale is preheating to 800～900 ℃, spent air temperture drops to 200～240 ℃, is sent to fly-ash separator 20 dedustings by flue 19.
Other are with embodiment 1.
The activity of lime finished product is 392～394ml, and chip index 2.0% is given birth to burning 0.4%.
Embodiment 3:
A kind of production unit that rotates height of bed activity lime of the present invention, ore preheater 3 adopt chain grate formula ore preheater, and discharging machine 13 adopts water-cooled push rod discharging machine, and water cooler 14 adopts chain grate formula water cooler, and air preheater is the Clothoid type air preheater.。Other apparatus embodiments 1.
Fuel adopts coal gas of converter.
Other are with embodiment 1.
The activity of lime finished product is 394～398ml, chip index 3.0%, dirt burning 0.4%.
Embodiment 4:
A kind of production unit that rotates height of bed activity lime of the present invention, ore preheater 3 adopts vertical ore preheater, and discharging machine 13 adopts water-cooled push rod discharging machine, and water cooler 14 adopts shaft cooler, and air preheater is tubular air preheater.Other apparatus embodiments 1.
Fuel adopts Sweet natural gas.
Other are with embodiment 1.
The activity of lime finished product is 396～399ml, and chip index 1.5% is given birth to burning 0.3%.
Embodiment 5:
A kind of dirt that rotates height of bed activity lime of the present invention produces equipment, is used for light dolomite, is about to rhombspar at 950～1000 ℃ of mixtures that are sintered into CaO and MgO.Size of Dolomite 10～60mm, be transported to ore storage bunker 2 by rotary conveyor 1, high-temperature flue-gas from rotating bed is 900～1000 ℃, high-temperature flue gas carries out heat exchange with rhombspar in vertical ore preheater, rhombspar is preheating to 700～800 ℃, spent air temperture drops to 150～200 ℃, is sent to fly-ash separator 20 dedustings by flue 19.
Less than 30mm, large material granularity 30～60mm divides on three layers of cloth rotating bed bed surface greater than 15mm for rhombspar small powder granularity 5～15mm after the preheating, middle material granularity, and the bottom of the bed of material is small powder, and the middle part of the bed of material is middle material, and the top of the bed of material is aniseed.
The rotating bed bed surface is comprised of refractory materials, 850～950 ℃ of bed surface temperature, 900～950 ℃ of heating zone furnace gas temperatures, 1000～1100 ℃ of high-temperature zone furnace gas temperatures, 1000～1050 ℃ of soaking zone furnace gas temperatures.
Discharging machine outputs to water cooler to light dolomite (900～1000 ℃), air at room temperature is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, and the high-temp waste gas that forms to water cooler top is preheating to 400～600 ℃ to the combustion air from burner blower through air preheater and is sent to the rotating bed combustion fuel; Light dolomite is from top to bottom motion in water cooler, by behind Rapid cooling in the air to 80～100 ℃, delivers to the light dolomite finished bin by rotary conveyor.
Other are with embodiment 1.
Claims (11)
1. a rotating bed equipment comprises ore preheater (3), distributor (5), vibratory screening apparatus (6), rotating bed (12) and cooling system; Ore preheater (3) links to each other with distributor (5), and distributor (5) links to each other with rotating bed (12) from top to bottom through vibratory screening apparatus (6); Rotating bed (12) links to each other with cooling system; Described rotating bed (12) is comprised of cloth district (7), heating zone (8), high-temperature zone (9), soaking zone (10) and discharge zone (11); Cloth district (7), heating zone (8), high-temperature zone (9), soaking zone (10) and discharge zone (11) are arranged also clockwise or counterclockwise successively along the rotating bed bed surface and are mutually joined end to end; Vibratory screening apparatus (6) is installed in the top of cloth district (7); Rotating bed (12) bed surface is comprised of refractory materials, and described refractory materials divides three layers, and the bottom is that light fire brick, middle part are that clay brick, surface are high alumina bricks.
2. rotating bed equipment as claimed in claim 1 is characterized in that, described rotating bed equipment also comprises charging equipment, and charging equipment links to each other with ore preheater (3), and is ore preheater (3) convey materials;
Described rotating bed equipment also comprises ore storage bunker (2), and ore storage bunker (2) is positioned at ore preheater (3) top and is connected with ore preheater (3); The material that charging equipment is carried enters ore preheater (3) through ore storage bunker (2);
Described rotating bed equipment also comprises high-temperature flue gas pipeline (4), and high-temperature flue gas pipeline (4) two ends link to each other with the soaking zone (10) of ore preheater (3) and rotating bed (12) respectively.
3. rotating bed equipment as claimed in claim 2 is characterized in that, described charging equipment is rotary conveyor (1), or chapelet; Described ore preheater (3) is vertical ore preheater, or chain grate formula ore preheater; Described rotating bed is rotary hearth continous furnance.
4. such as each described rotating bed equipment of claim 1～3, it is characterized in that, described cooling system comprises:
Discharging machine (13), water cooler (14), air preheater (15), combustion air pipeline (16), burner blower (17), exhaust pipeline (18); Discharging machine (13) is installed on rotating bed (12) bed surface, and discharge end links to each other with water cooler (14); One end of air preheater (15) links to each other with water cooler (14) top by pipeline, the hot gas introducing air preheater (15) in the water cooler (14), air preheater (15) the other end links to each other with flue (19) by exhaust pipeline (18), and waste gas is taken away; Burner blower (17) links to each other with air preheater (15) freezing air is sent into air preheater (15) preheating, and combustion air pipeline (16) two ends link to each other with rotating bed (12) with air preheater (15) respectively, and preheated air is sent into rotating bed (12).
5. rotating bed equipment as claimed in claim 4 is characterized in that, described discharging machine (13) is selected from water-cooled push rod discharging machine, or the water-cooling spiral discharging machine; Described water cooler (14) is shaft cooler, or chain grate formula water cooler; Described air preheater (15) is tubular air preheater, or the Clothoid type air preheater.
6. such as each described rotating bed equipment of claim 1～3, it is characterized in that described rotating bed equipment also comprises waste gas dedusting system and gas burning system;
Described waste gas dedusting system comprises: exhaust pipeline (18), flue (19), fly-ash separator (20), dedusting fan (21) and smoke discharging pipe (22); Exhaust pipeline (18) is connected with flue (19), and flue (19) two ends link to each other with ore preheater (3) with fly-ash separator (20) respectively, and dedusting fan (21) two ends link to each other with smoke discharging pipe (22) with fly-ash separator (20) respectively;
Described gas burning system comprises: gas pipeline (23) and fuel cartridge (24); Fuel cartridge (24) through gas pipeline (23) and rotating bed (12) with link to each other, be rotating bed supply combustion gas.
7. a producing and manufacturing technique that rotates height of bed activity lime comprises the steps:
1) Wingdale is directly sent into the ore preheater through charging equipment; Or send into ore storage bunker, send into the ore preheater through ore storage bunker;
2) ore preheater be used to the to spin high-temperature flue gas preheating Wingdale to 800 of rotated bed～900 ℃;
3) Wingdale after the preheating is isolated small powder, middle material, aniseed through distributor, vibratory screening apparatus, and three layers of cloth are on the bed surface of rotating bed;
4) burning of fuel and combustion air provides heat for rotating bed, and Wingdale through cloth district, heating zone, high-temperature zone, soaking zone and discharge zone, obtains the industrial lime of high activity high-quality at rotating bed;
5) high temperature lime outputs to water cooler by discharging machine, and by the output of water cooler bottom, cooling exhaust was used to warm-up combustion-supporting air simultaneously after high temperature lime was quickly cooled to 80～100 ℃ in water cooler; The rotating bed high-temperature flue gas is sent to the ore preheater and is used for the preheating Wingdale, and heat obtains the high efficiente callback utilization.
8. the producing and manufacturing technique of rotation height of bed activity lime as claimed in claim 7 is characterized in that, the described limestone granularity of step 1) is 10～60mm;
Step 2) described high-temperature flue gas is from rotating bed, and temperature is 1000～1100 ℃, and high-temperature flue gas carries out heat exchange with Wingdale in the ore preheater, Wingdale is preheating to 800～900 ℃, and spent air temperture drops to 200～240 ℃ and is sent to the fly-ash separator dedusting;
Wingdale small powder granularity 5～15mm after the described preheating of step 3), middle material granularity be greater than 15mm less than 30mm, large material granularity 30～60mm; Described three layers of cloth, namely the bottom of the rotating bed bed surface bed of material is that the middle part of small powder, the bed of material is that the top of middle material, the bed of material is aniseed;
The described gas-burning of step 4) or coal dust; Described inflammable gas is selected from furnace of calcium carbide coal gas, blast furnace gas, coal gas of converter, coke-oven gas or Sweet natural gas;
The described discharging machine of step 5) outputs to water cooler to 950～1000 ℃ high temperature lime, air at room temperature is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, the high-temp waste gas that forms to water cooler top reaches 700～900 ℃ and enters air preheater, in air preheater the freezing air from burner blower is preheating to 400～600 ℃ and is sent to the rotating bed combustion fuel, waste gas is sent to fly-ash separator by exhaust pipeline; High temperature lime is from top to bottom motion in water cooler, to less than after 80～100 ℃, is delivered to lime finished bin by rotary conveyor by Rapid cooling in the air.
9. such as the producing and manufacturing technique of claim 7 or 8 described rotation height of bed activity lime, it is characterized in that, 900～1000 ℃ of the cloth district of rotating bed and the bed surface temperature of discharge zone, 1000～1100 ℃ of the furnace gas temperatures of the soaking zone of 1150～1300 ℃ of the furnace gas temperatures of the high-temperature zone of 1000～1100 ℃ of the furnace gas temperatures of the heating zone of rotating bed, rotating bed, rotating bed.
10. such as the application of each described rotating bed equipment of claim 1～3, be used for light dolomite.
11. the application of rotating bed equipment as claimed in claim 10 is characterized in that the dolomite calcination temperature is 950～1000 ℃, is about to rhombspar at 950～1000 ℃ of mixtures that are sintered into CaO and MgO; Size of Dolomite 10～60mm, be transported to ore storage bunker (2) by rotary conveyor (1), high-temperature flue-gas from rotating bed is 900～1000 ℃, high-temperature flue gas carries out heat exchange with rhombspar in vertical ore preheater, rhombspar is preheating to 700～800 ℃, spent air temperture drops to 150～200 ℃, is sent to fly-ash separator (17) dedusting by flue (16);
Less than 30mm, large material granularity 30～60mm divides on three layers of cloth rotating bed bed surface greater than 15mm for rhombspar small powder granularity 5～15mm after the preheating, middle material granularity, and the bottom of the bed of material is small powder, and the middle part of the bed of material is middle material, and the top of the bed of material is aniseed;
The rotating bed bed surface is comprised of refractory materials, 850～950 ℃ of bed surface temperature, 900～950 ℃ of heating zone furnace gas temperatures, 1000～1100 ℃ of high-temperature zone furnace gas temperatures, 1000～1050 ℃ of soaking zone furnace gas temperatures;
Discharging machine outputs to water cooler to 900～1000 ℃ light dolomite, air at room temperature is moved upward by the bottom and carries out heat exchange with high temperature lime in water cooler, and the high-temp waste gas that forms to water cooler top is preheating to 400～600 ℃ to the combustion air from burner blower through air preheater and is sent to rotating bed; Light dolomite is from top to bottom motion in water cooler, by behind Rapid cooling in the air to 80～100 ℃, delivers to the light dolomite finished bin by rotary conveyor.
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| CN102180604B true CN102180604B (en) | 2013-01-02 |
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| CN102627414B (en) * | 2012-03-31 | 2013-09-04 | 济钢集团国际工程技术有限公司 | Device for realizing waste heat recovery by directly calcining lime through primary high-temperature flue gas of converter |
| CN102627415A (en) * | 2012-04-20 | 2012-08-08 | 桂林灵川县金山思达新型材料厂 | Energy-saving environmental-friendly lime production line for rotary electrical kiln |
| CN103148703A (en) * | 2013-03-13 | 2013-06-12 | 莱芜钢铁集团有限公司 | Experimental device for simulating reduction of rotary hearth furnace |
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| CN109182644A (en) * | 2018-08-08 | 2019-01-11 | 鞍钢股份有限公司 | Alloy material baking furnace system and operating method after a kind of rotation cloth converter |
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| CN109354421A (en) * | 2018-11-26 | 2019-02-19 | 中冶焦耐(大连)工程技术有限公司 | A kind of distributing method for calcining small grain size lime stone shaft furnace |
| CN113182034B (en) * | 2021-03-25 | 2023-06-30 | 兰陵县福业建材有限公司 | Device for screening out and utilizing waste heat of kiln to calcine limestone in layering mode after crushing |
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| CN202089901U (en) * | 2010-12-15 | 2011-12-28 | 周生献 | Rotating bed equipment |
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| EP0303963A2 (en) * | 1987-08-14 | 1989-02-22 | Deutsche Filterbau Gmbh | Process and installation for the calcination of limestone |
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