CN208218696U - A kind of light-burned MgO suspension calcining process units - Google Patents
A kind of light-burned MgO suspension calcining process units Download PDFInfo
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- CN208218696U CN208218696U CN201820549436.XU CN201820549436U CN208218696U CN 208218696 U CN208218696 U CN 208218696U CN 201820549436 U CN201820549436 U CN 201820549436U CN 208218696 U CN208218696 U CN 208218696U
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Abstract
The utility model discloses a kind of light-burned MgO suspension calcining production technology and device, including raw material cabin, five-stage whirlwind preheating cylinder, suspension calcining furnace, three sets of combustion systems, three-level suspension cooling cylinder, two-step fluidized bed, emission-control equipment, telescopic water-cooled screw conveyor, finished bin, blower, flap valve and hygrosensor etc.；Produced light calcined magnesia Product Activity is single, unusual service condition stays the disadvantages of material cannot handle the stable operation for influencing whole system in time, combustion system is evenly arranged in suspension roaster short transverse and radial direction, and two-step fluidized bed is configured in the discharge port of suspension calcining furnace, it solves to occur collapsing under unusual service condition while expect phenomenon, the accurate subregion calcining that different activities magnesia can be achieved, is conducive to popularization and application of the light calcined magnesia in building trade.
Description
Technical field
The utility model relates to light-burned MgO Industrialized processing technique, in particular to a kind of light-burned MgO using magnesite is outstanding
Floating calcining process units.
Background technique
Light-burned MgO is by magnesite (MgCO3) formed by calcining, grinding.Magnesite (MgCO3) theoretical decomposition temperature
It is 560 DEG C, when temperature is lower than 560 DEG C, magnesite cannot be decomposed, and cause raw burn, and when temperature is higher than 560 DEG C, magnesite starts point
Solution, the MgO granularity of generation is small, and activity is high, and with the raising of calcination temperature, MgO compact crystallization, activity becomes smaller.
The roasting of light-burned MgO is a kind of chemical reaction process, MgCO3It is thermally decomposed into MgO and CO2, burning and underburnt all can
Lead to the reduction of MgO activity, or even loses activity.
Activity and the calcination temperature of MgO has direct relation, in order to improve the activity of MgO, the side of general multi-purpose low temperature calcination
Method.The industrialized production overwhelming majority of current light-burned MgO uses kiln process.Shaft kiln production technology equipment falls behind, calcining
Temperature drift (about 1200 DEG C~1300 DEG C) is layered the side of tiling stacking with bulk material (100mm~300mm) magnesite raw material
Formula is calcined in kiln, and gas-solid reaction contact area is small, and calcination time is long, and raw outer burnt in product, surface calcining excessively easily causes object
Expect " dead roasting ", inside calcining, which is not thorough, leads to material " underburnt ", it is difficult to produce high activity MgO, production process is existed by operator
Flame-observing hole is observed, breaks up, screening discharging, and the degree of automation is low, and dust emission concentration height (> 500mg/ in exhaust gas
Nm3), it is a kind of very backward MgO production method.
The Chinese patent literature of publication number CN102674408A discloses a kind of continuous production side of light calcined magnesia kiln
Method is realized the continuous production of light calcined magnesia using a kind of three-dimensional combustion system cooperation continuous gas supply, overcome existing
Stop the thermal loss in kiln start-up course in shaft kiln production technology, improves energy utilization rate.This method is simply by adding coal
Gas storage tank improves the duration of gas supply, but still uses bulky grain magnesite for raw material, does not change fundamentally
The small defect of gas-solid reaction contact area not can significantly reduce although improving the unit-hour output of shaft kiln production magnesia
The firing heat consumption of light calcined magnesia, can not Effective Regulation light calcined magnesia Product Activity.
The Chinese patent literature of publication number CN106431021A discloses a kind of preparation method of concrete magnesia, is
Use bulky grain magnesite (10mm~150mm) for raw material, with 800 DEG C~1100 DEG C of calcination temperature, in rotary kiln device
Carry out the MgO of industrialized production different activities.When this method production MgO, still using bulky grain magnesite as raw material, calcining is anti-
At once, gas-solid reaction contact area is small, and heat transfer is uneven and heat transfer efficiency is low, lacks preheating step, and exhaust gas exhaust temperature is high, difficult
To realize the recycling of waste heat, the firing heat consumption of MgO is high, and the light-burning magnesium powder being burnt into cannot be used directly, also needs with mill
Machine grinding could be used at 0.08mm fine powder below.In addition, calcined by rotary kiln equipment is a kind of rotating machinery of large size, furnace lining
Easy to fall off during rotation, service life is short, and maintenance cost is high.
The Chinese patent literature of publication number CN106007416A discloses a kind of light calcined magnesia roasting kiln suspension roasting
Device uses fine powder magnesite for raw material, and material and the same mode for ramping up suspension calcining of hot gas prepare light calcined magnesia.It is this
Method increases gas-solid reaction contact area, improves heat exchanger effectiveness, but lacks high temperature powder cooling system and waste heat from tail gas
Recycling system not can significantly reduce the firing heat consumption of light calcined magnesia.
The Chinese patent literature of publication number CN106007415A discloses a kind of suspension flash preparation light-burned oxidation of high activity
Magnesium complexes, use fine powder magnesite for raw material, prepare light calcined magnesia by calciner of suspension kiln.Although this method
The firing heat consumption of light calcined magnesia is reduced by recycling high-temperature residual heat, but this utility model calcination temperature adjustable range is narrow,
A kind of active light calcined magnesia can only be produced, can not achieve the accurate subregion calcining of the light-burned MgO of different activities, and is not considered
Under system exception operating condition, what the suspension that wind speed is not able to satisfy material was taken, which collapse, expects the influence of stable operation of the phenomenon to system.
The Chinese patent literature of publication number CN103373822A discloses a kind of light-magnesite powder calciner plant, using thin
Powder magnesite is raw material, prepares light calcined magnesia by suspension preheating, calcining and decomposing, cooling gather dust.Although this method reduces
The firing heat consumption of light calcined magnesia, but equally can not achieve the accurate subregion calcining of different activities light-burned MgO.
Light calcined magnesia is while metallurgy industry is applied, as a kind of Concrete Crack Control material in building trade
Start large-scale promotion application, and formulates relevant professional standard for specification magnesia performance indicator.Hydropower industry standard DL/
By light calcined magnesia Product Activity index size in T 5296-2013 " concrete for hydraulic structure mixes magnesia technical specification ", it is divided into
(50~200) s and two kinds of products of (200~300) s；Chinese architecture materials association standard CBMF19-2017 " concrete oxidation
Magnesium swelling agent " in press light calcined magnesia Product Activity index size, be divided into (0~100) s, (100~200) s and (200~300)
Tri- kinds of products of s.Existing magnesia roasting apparatus absolute majority is metallurgy industry service, and produced light calcined magnesia activity is single,
Modulatory character is poor, although the Chinese patent literature of Publication No. CN106431021A disclose it is a kind of with calcined by rotary kiln production not
With the method for activated magnesia, but the method is high to the particle size requirements of magnesite raw material, and utilization rate of waste heat is low, and magnesia is burnt
At heat consumption height, economic cost is high, is unfavorable for the popularization and application in building trade.
Utility model content
The technical issues of the utility model is solved overcomes present in light calcined magnesia roasting apparatus in the prior art
Calcination temperature adjustable range is narrow, and Product Activity is single, and easily collapse material under unusual service condition, influences the deficiency of system stable operation
Place, and the production work of a kind of light-burned MgO suspension calcining process units and its accurate subregion calcining of the light-burned MgO of different activities is provided
Skill.
Realize above-mentioned purpose, the technical solution adopted in the utility model is:
A kind of light-burned MgO suspension calcining process units, composition include raw material cabin, suspension calcining furnace, three sets of combustion systems,
Emission-control equipment, telescopic water-cooled screw conveyor, finished bin, blower and hygrosensor further include the rotation of total Pyatyi
Wind preheats suspension cooling cylinder, the two-step fluidized bed of cylinder, total three-level；
Wherein the feed opening of raw material cabin is connected to by conveying equipment with the air outlet that second level whirlwind preheats cylinder, and second level whirlwind is pre-
The air outlet of hot cylinder is connected by connection air hose with the air inlet that one cyclonic preheats cylinder, and the discharge port that one cyclonic preheats cylinder is logical
Charge tube is connected with the air inlet of second level whirlwind preheating cylinder, and the air outlet that three-level whirlwind preheats cylinder is revolved by connection air hose and second level
The air inlet that wind preheats cylinder is connected, and the discharge port that second level whirlwind preheats cylinder preheats the air inlet phase of cylinder by expects pipe with three-level whirlwind
Even, the air outlet of Category Four cyclone preheating cylinder is connected by connection air hose with the air inlet that three-level whirlwind preheats cylinder, and three-level whirlwind is pre-
The discharge port of hot cylinder is connected by expects pipe with the air inlet that Category Four cyclone preheats cylinder, and the air outlet of five-stage whirlwind preheating cylinder passes through company
Air duct is connected with the air inlet of Category Four cyclone preheating cylinder, and the discharge port that Category Four cyclone preheats cylinder passes through expects pipe and suspension calcining furnace
Bottom feed inlet be connected, the air inlet phase that the top outlet inlet of suspension calcining furnace passes through connection air hose and five-stage whirlwind preheating cylinder
Even, the discharge port of five-stage whirlwind preheating cylinder is connected by expects pipe with the air inlet of one cyclonic cooling cylinder, second level whirlwind cooling cylinder
Air outlet is connected by connecting air hose with the air inlet of one cyclonic cooling cylinder, and the discharge port of one cyclonic cooling cylinder passes through expects pipe
It is connected with the bottom feed inlet of level-one fluidized bed, the top outlet inlet of level-one fluidized bed is cooling by connection air hose and second level whirlwind
The air inlet of cylinder is connected, and the discharge port of second level whirlwind cooling cylinder is connected by expects pipe with the bottom feed inlet of second level fluidized bed, and two
The top discharge mouth of grade fluidized bed is connected by connecting air hose with the air inlet of three-level whirlwind cooling cylinder, three-level whirlwind cooling cylinder
Gas outlet is connected by air hose with the first emission-control equipment, and the gas outlet of the first emission-control equipment passes through air-introduced machine and chimney
It is connected, the discharge port of three-level whirlwind cooling cylinder is connected with the feed inlet of telescopic water-cooled screw conveyor, telescopic water-cooling spiral
The discharge port of conveyer is connected with finished bin, and the gas outlet that one cyclonic preheats cylinder is filled by high-temperature blower and the second exhaust-gas treatment
It sets, the feed opening of the second emission-control equipment is connected by conveying equipment with the feed opening of raw material cabin.
In above-mentioned apparatus, suspension calcining furnace is equipped with three sets of combustion systems in short transverse, is located at suspension calcining furnace
Top, middle part and bottom, every set combustion system can independent operating, and be evenly arranged four combustions in suspension calcining furnace radial direction
Burner burner is 90 ° as preferred adjacent burner angle in the horizontal direction.
In above-mentioned apparatus, five-stage whirlwind preheats the combustion of the inlet and outlet of cylinder, the inlet and outlet of suspension calcining furnace, three sets of combustion systems
At burner burner, the inlet and outlet of three-level whirlwind cooling cylinder, the inlet and outlet of two-step fluidized bed be equipped with hygrosensor.
In above-mentioned apparatus, by the mutual cooperation of three sets of combustion systems, the temperature in suspension calcining furnace can be significantly adjusted
, and then realize the accurate subregion calcining of the light-burned MgO of different activities.
In above-mentioned apparatus, the flap valve with counterweight balance is equipped on the feeder pipe of cyclone cylinders at different levels.
In above-mentioned apparatus, under nominal situation, fluidized bed is used as suspension cooling heat exchanger, and collapse material under unusual service condition
When, fluidized bed is used as the material processing device that collapses.
When occur collapsing expect when, high temperature MgO clinker is flowed out from level-one, second level, three-level, level Four, Pyatyi preheater, to two-stage
Aggregation in fluidized bed, the high temperature powder being gathered in fluidized bed fluidize cooling, the cold wind energy of frequency conversion fan supply in fluidized bed
Overcome fluidized bed bed and MgO clinker layer resistance, uniformly penetrate MgO clinker layer, obtains the MgO clinker on fluidized bed effectively cold
But, MgO clinker can return suspension kiln calcining, really through spare transportation system return feeding bin again after kiln system is stablized after cooling
Protect the stability of entire production system.
In above-mentioned apparatus, two-step fluidized bed is furnished with independent frequency conversion fan, and airflow pressure is adjustable.
In above-mentioned apparatus, cold blast sliding valve is housed at emission-control equipment entrance air hose, to ensure into emission-control equipment
Gas temperature is lower than the use temperature of cloth bag.
The emission-control equipment is bag filter, and bag filter is made by many beanbag assembled arrangements
, by the filtering of cloth bag, plays the role of gathering dust, handles exhaust gas.This device is that kiln thermal technology industry handles the common of tail gas
Equipment.
Bag filter is made by many beanbag assembled arrangements, is supported by metal bag cage, cloth bag covers
In bag cage, it is located at the inside of emission-control equipment (bag filter), after exhaust gas enters emission-control equipment (bag filter),
It is adsorbed by the filtering of cloth bag, reduces the dust content in exhaust gas, play the role of gathering dust, handle exhaust gas.The meaning stated herein
Think to be that cloth bag cannot be excessively high using temperature, cloth bag can be made burnt when the gas of high temperature passes through cloth bag, so the air intake vent of cloth bag is set
There is cold blast sliding valve to carry out cooling treatment.
In above-mentioned apparatus, the water inlet of telescopic water-cooled screw conveyor is connected with municipal tap water pipe, water outlet and bath
Room water tower is connected.
In above-mentioned apparatus, to reduce the dust concentration in production process, storehouse is equipped at the top of raw material cabin top and finished bin
Push up deduster.
Roof scrubber is pulsed bagroom herein.The powder that will be escaped at the top of raw material cabin and finished bin by cloth bag
Dirt adsorption filtration, then compressed air is provided by pulse valve, the dust punching of absorptive collection on cloth bag is shaken, raw material is recovered to
In storehouse and finished bin, the requirement of environmental protection production is played.
To implement the accurate subregion production that the utility model device carries out the light-burned MgO of different activities, the utility model is used
Following suspension calcining technique: the magnesium carbonate powder in raw material cabin is preheated into cylinder gas vent by being sent into second level whirlwind by conveying equipment
Pipeline disperses immediately under airflow function, suspends in the gas flow, and enter one cyclonic preheating cylinder preheating, after through second level, three
Grade, Category Four cyclone preheating cylinder enter suspension calcining furnace calcining and decomposing after preheating step by step, and sintered MgO clinker is pre- through five-stage whirlwind
Hot cylinder enters the cooling of suspension cooling system and separates step by step, most feeds finished bin after telescopic water-cooled screw conveyor is cooling afterwards
Storage, the exhaust gas separated enter emission-control equipment processing, discharge.
In above-mentioned technique, by adjust suspension calcining furnace on three sets of combustion systems combustor nozzle unlatching number and
Corresponding gas flow can be such that the temperature field in suspension calcining furnace stablizes within the scope of 700 DEG C~1100 DEG C, to realize difference
The accurate subregion of active light-burned MgO is calcined.
In above-mentioned technique, to control calcination temperature precision, five-stage whirlwind preheats the disengaging of the inlet and outlet, suspension calcining furnace of cylinder
Mouthful, at the combustor nozzles of three sets of combustion systems, the inlet and outlet of three-level whirlwind cooling cylinder, the inlet and outlet of two-step fluidized bed are equipped with
Hygrosensor, and the gas quantity data of temperature data and the combustion system at each position are subjected to linkage control by computer system
System, to ensure the stability of calcination temperature.
In above-mentioned technique, expect that phenomena impair system is run for collapsing of solving the problems, such as to occur under unusual service condition, it is cold suspending
Two-step fluidized bed is but set in system, and every grade of fluidized bed configures independent frequency conversion fan, and airflow pressure is adjustable, when collapsing
When material, high temperature MgO clinker fluidizes cooling in fluidized bed, and the cold wind of frequency conversion fan supply can overcome fluidized bed bed and MgO ripe
Materialbeds comminution uniformly penetrates MgO clinker layer, is winding is effectively cooled the MgO clinker on fluidized bed, it is ensured that entire production system
Stability.
In above-mentioned technique, the exhaust gas of one cyclonic preheating cylinder discharge collects the magnesite to get off after exhaust treatment system is handled
Mine raw meal powder is sent into whirlwind preheating cylinder by conveying equipment and continues preheating and calcining decomposition, and the exhaust gas of three-level whirlwind cooling cylinder discharge is through useless
The MgO chamotte powder to get off is collected after gas processing system processing, and finished bin storage, entire production system circulation are sent by conveying equipment
Closing, dust discharge amount is few, and environmental pollution is small.
In above-mentioned technique, MgO chamotte powder enters telescopic water-cooling spiral after three-level whirlwind cooling cylinder Conveyance and conveys
Machine is cooled further to 70 DEG C once, and MgO chamotte powder after cooling is sent into finished bin storage, is packed, in cooling heat exchanging process
The hot water of generation is sent to bathroom water tower for employee's bathing, effectively increases the utilization rate of waste heat.
Compared with prior art, the utility model has the following beneficial effects: (1), suspension burner in the stove burner be uniformly distributed,
Calcination temperature field stability is good in furnace, and calcination temperature adjustable extent is wide, it can be achieved that the accurate of the light-burned MgO of different activities is divided
Area's calcining, good product quality provide safeguard for popularization and application of the light-burned MgO in building trade；(2), fluidized by setting two-stage
Bed, efficiently solves the stable operation for expecting phenomenon to system of collapsing that the suspension that wind speed cannot meet material under unusual service condition is taken
Influence, reduce and stop kiln maintenance frequency, provided safeguard for the stable operation of production system.(3), this system calcine technology burns
Completely, excess air coefficient is low, and the oxygen content in exhaust gas is low, and nitrogen sulfur compound production quantity is few, and drop temperature and exhaust gas go out
Mouth temperature is at 70 DEG C hereinafter, utilization rate of waste heat is high, and light-burned MgO firing heat consumption is low, and dust emission concentration is low, the pollution to environment
It is small.
Detailed description of the invention
Fig. 1 show the light-burned MgO suspension calcining process units process flow chart of the utility model.
Fig. 2 show the light-burned MgO suspension calcining process units combustion system arrangement schematic diagram of the utility model.
In figure: 1 is raw material cabin, and 2 preheat cylinder for one cyclonic, and 3 be hygrosensor, and 4 be the first flap valve, and 5 be second level
Whirlwind preheats cylinder, and 6 be the second flap valve, and 7 preheat cylinder for three-level whirlwind, and 8 be third flap valve, and 9 be connection air hose, and 10 be level Four
Whirlwind preheats cylinder, and 11 the 4th flap valves, 12 be feeder pipe, and 13 be suspension calcining furnace, and 14 be the first combustion system, and 15 be the second combustion
Burning system, 16 be third combustion system, and 17 preheat cylinder for five-stage whirlwind, and 18 be the 5th flap valve, and 19 be one cyclonic cooling cylinder,
20 be the 6th flap valve, and 21 be level-one fluidized bed, and 22 be the first frequency conversion fan, and 23 be second level whirlwind cooling cylinder, and 24 turn over for the 7th
Plate valve, 25 be second level fluidized bed, and 26 be the second frequency conversion fan, and 27 be three-level whirlwind cooling cylinder, and 28 be the 8th flap valve, and 29 be set
Cartridge type water-cooled screw conveyor, 30 be finished bin, and 31 be bathroom water tower, and 32 be the first emission-control equipment, and 33 be air-introduced machine, 34
It is high-temperature blower for chimney, 35,36 be the second emission-control equipment.
Specific embodiment
It is practical new to this with reference to the accompanying drawings and detailed description to keep the content of the utility model more obvious and easy to understand
Type is described further.
A kind of light-burned MgO suspension calcining process units, process flow is as shown in Figure 1, pre- including raw material cabin 1, one cyclonic
Hot cylinder 2, three-level whirlwind preheating cylinder 7, Category Four cyclone preheating cylinder 10, five-stage whirlwind preheating cylinder 17, suspends at second level whirlwind preheating cylinder 5
Calcining furnace 13, first stage suspension cooling cylinder 19, second level suspension cooling cylinder 23, three-level suspension cooling cylinder 27, level-one fluidized bed 21, second level
Fluidized bed 25, the first combustion system 14, the second combustion system 15, third combustion system 16, telescopic water-cooled screw conveyor 29,
Finished bin 30, the first emission-control equipment 32, the second emission-control equipment 36；It is characterized by: the feed opening of raw material cabin 1 passes through
Conveying equipment is connected to the air outlet of second level whirlwind preheating cylinder 5, and second level whirlwind preheats 5 air outlet of cylinder and passes through connection air hose 9 and one
The air inlet of grade whirlwind preheating cylinder 2 is connected, and the discharge port that one cyclonic preheats cylinder 2 preheats cylinder 5 by expects pipe 12 and second level whirlwind
Air inlet be connected, three-level whirlwind preheating 7 air outlet of cylinder is connected by the air inlet of connection air hose 9 and second level whirlwind preheating cylinder 5,
The discharge port of second level whirlwind preheating cylinder 5 is connected by expects pipe 12 with the air inlet that three-level whirlwind preheats cylinder 7, and Category Four cyclone preheats cylinder
10 air outlets are connected by connection air hose 9 with the air inlet that three-level whirlwind preheats cylinder 7, and the discharge port that three-level whirlwind preheats cylinder 7 is logical
The air inlet of charge tube 12 and Category Four cyclone preheating cylinder 10 is connected, five-stage whirlwind preheat 17 air outlet of cylinder by connection air hose 9 and
The air inlet that Category Four cyclone preheats cylinder 10 is connected, and the discharge port that Category Four cyclone preheats cylinder 10 passes through expects pipe 12 and suspension calcining furnace 13
Bottom feed inlet be connected, the top outlet inlet of suspension calcining furnace 13 by connection air hose 9 and five-stage whirlwind preheat cylinder 17 into
Air port is connected, and the discharge port of five-stage whirlwind preheating cylinder 17 is connected by expects pipe with the air inlet of one cyclonic cooling cylinder 19, second level
23 air outlet of whirlwind cooling cylinder is connected by connecting air hose 9 with the air inlet of one cyclonic cooling cylinder 19, one cyclonic cooling cylinder
19 discharge port is connected by expects pipe 12 with the bottom feed inlet of level-one fluidized bed 21, and the top outlet inlet of level-one fluidized bed 21 is logical
It crosses connection air hose 9 to be connected with the air inlet of second level whirlwind cooling cylinder 23, the discharge port of second level whirlwind cooling cylinder 23 passes through expects pipe 12
It is connected with the bottom feed inlet of second level fluidized bed 25, the top discharge mouth of second level fluidized bed 25 is revolved by connection air hose 9 and three-level
The air inlet of air cooling cylinder 27 is connected, and the gas outlet of three-level whirlwind cooling cylinder 27 passes through air hose 9 and the first emission-control equipment 32
It is connected, the gas outlet of the first emission-control equipment 32 is connected by air-introduced machine 33 with chimney 34, and three-level whirlwind cooling cylinder 27 goes out
Material mouth is connected with the feed inlet of telescopic water-cooled screw conveyor 29, the discharge port and finished product of telescopic water-cooled screw conveyor 29
Storehouse 30 is connected, and the gas outlet that one cyclonic preheats cylinder 2 passes through air-introduced machine 35 and the second emission-control equipment 36, the second exhaust-gas treatment
The feed opening of device 36 is connected by conveying equipment with the feed opening of raw material cabin 1.
In above-mentioned apparatus, suspension calcining furnace is equipped with three sets of combustion systems in short transverse, and the first combustion system 14 is located at outstanding
The bottom of floating calcining furnace, the second combustion system 15 are located at the middle part of suspension calcining furnace, and third combustion system 16 is located at suspension calcining
The top of furnace.Every set combustion system can independent operating, and be evenly arranged four burners in suspension calcining furnace radial direction and burn
Mouth is 90 ° as preferred adjacent burner angle in the horizontal direction, arrangement schematic diagram of the combustor nozzle in suspension calcining furnace
As shown in Figure 2.
In above-mentioned apparatus, for the precision for controlling calcination temperature, five-stage whirlwind preheat the inlet and outlet of cylinder, suspension calcining furnace into
Outlet, three sets of combustion systems combustor nozzle at, the inlet and outlet of three-level whirlwind cooling cylinder, the inlet and outlet of two-step fluidized bed are all provided with
There is hygrosensor, and temperature data and the gas quantity data of the combustion system at each position are linked by computer system
Control, to ensure the stability of calcination temperature.
In above-mentioned apparatus, by the mutual cooperation of three sets of combustion systems, the temperature in suspension calcining furnace can be significantly adjusted
, and then realize the accurate subregion calcining of the light-burned MgO of different activities.
In above-mentioned apparatus, separative efficiency is influenced to prevent air-flow from playing a reversed role along feeder pipe, on the feeder pipe of cyclone cylinders at different levels
Equipped with the flap valve with counterweight balance, wherein the feeder pipe of one cyclonic preheating cylinder 3 is equipped with the first flap valve 4, second level whirlwind
Preheat cylinder 5 feeder pipe be equipped with the second flap valve 6, three-level whirlwind preheat cylinder 7 feeder pipe be equipped with third flap valve 8, four
Grade whirlwind preheating 10 feeder pipe of cylinder is equipped with the 4th flap valve 11, and the feeder pipe that five-stage whirlwind preheats cylinder 17 is equipped with the 5th turnover panel
Valve 18, the feeder pipe of one cyclonic cooling cylinder 19 are equipped with the 6th flap valve 20, set on the feeder pipe of second level whirlwind cooling cylinder 23
There is the 7th flap valve 24, the feeder pipe of three-level whirlwind cooling cylinder 27 is equipped with the 8th flap valve 28, passes through in actual production process
Weight position is adjusted, turnover panel movement range size is controlled, it is ensured that material is smooth, stream continuous uniform.
In above-mentioned apparatus, it is respectively arranged at the entrance air hose of the first emission-control equipment 32 and the second emission-control equipment 36 cold
Air-valve, to ensure to be lower than the use temperature of cloth bag into the gas temperature of emission-control equipment.
In above-mentioned apparatus, the water inlet of telescopic water-cooled screw conveyor 29 is connected with municipal tap water pipe, water outlet and
Bathroom water tower 31 is connected, and the hot water in bathroom water tower can be used for employee's bathing.
In above-mentioned apparatus, to reduce the dust concentration in production process, the top of raw material cabin 1 and the top of finished bin 30 are equal
Equipped with roof scrubber.
To implement the accurate subregion production that the utility model device carries out the light-burned MgO of different activities, the utility model is used
Following suspension calcining technique: the magnesium carbonate powder in raw material cabin is sent into second level whirlwind by conveying equipment and preheats cylinder gas outlet tube
Road disperses immediately under airflow function, suspends in the gas flow, and enters one cyclonic preheating cylinder with air-flow.After Conveyance, carbon
Sour magnesium powder material enters three-level whirlwind by weight flap valve and preheats cylinder gases exit line, and enters the preheating of second level whirlwind with air-flow
Cylinder.And so on, magnesium carbonate raw meal powder passes through level-one, second level, three-level, Category Four cyclone preheating cylinder and its connecting pipe respectively to be completed
It after heat exchange, is fully warmed-up, is collected through Category Four cyclone preheating cylinder and enter suspension calcining furnace, hot raw material are in suspension calcining furnace
Heat exchange is carried out with the high-temperature gas after combustion of natural gas, magnesium carbonate is enable sufficiently to decompose.By adjusting on suspension calcining furnace
The unlatching number and corresponding gas flow of the combustor nozzle of three sets of combustion systems, can make the temperature field in suspension calcining furnace
Stablize within the scope of 700 DEG C~1100 DEG C, the light-burned MgO chamotte powder of different activities can be prepared under different calcination temperatures.
Sintered MgO clinker enters five-stage whirlwind preheating cylinder with air-flow, enters suspension cooling system after separation, cooling system is by three
Grade whirlwind cooling cylinder, two-step fluidized bed and the gas pipeline and discharge duct composition that connect cyclone cylinder.Calcining in suspension calcining furnace
The high temperature MgO chamotte powder of preparation goes out five-stage whirlwind preheating cylinder and is sent into second level whirlwind cooling cylinder gases exit line, in airflow function
Under disperse immediately, suspend in the gas flow, and enter one cyclonic cooling cylinder.After Conveyance, feed powder is turned by weight flap valve
It to level-one fluidized bed, is fully cooled in fluidized bed, and enters second level whirlwind cooling cylinder with air-flow, enter secondary streams after separation
Change bed, hot clinker and cooling air carry out heat exchange, be sufficiently cooled, enter three-level whirlwind cooling cylinder with air-flow, through separating
Enter telescopic water-cooled screw conveyor afterwards, so that MgO chamotte powder temperature is cooled to 70 DEG C hereinafter, then by the recirculated water of outer cylinder
It is sent into warehouse for finished product storage.It is sent through high-temperature blower to the second emission-control equipment, through receiving by the exhaust gas of one cyclonic preheating cylinder discharge
Atmosphere is discharged into after dirt processing, concentration of emission is≤20mg/Nm3, collect the powder to get off and sent by conveying equipment to raw material cabin
At material mouth, and then melt down calcining；It is sent through air-introduced machine to the first emission-control equipment, warp by the exhaust gas of three-level whirlwind cooling cylinder discharge
It gathers dust and is discharged into atmosphere after handling, concentration of emission is≤20mg/Nm3, collect the powder to get off and sent by conveying equipment to finished bin.
Following embodiments are for producing the suspension calcining production line of 1000 tons of light-burned MgO daily, by adjusting suspension calcining furnace
The unlatching number and air demand and magnesium carbonate raw meal powder feeding capacity of the combustor nozzle of upper three sets of combustion systems obtain different work
The light-burned MgO of property.
Embodiment 1
180 ° are opened in four combustor nozzles and the second combustion system 15 of the first combustion system 14 to be arranged symmetrically
Two combustor nozzles close remaining two combustor nozzles of the second combustion system 15 and third combustion system 16, adjust
Gas supply amount stablizes the temperature field in suspension calcining furnace at 750 DEG C.Magnesium carbonate powder is fed with the rate of feeding of 92t/h
Enter the gases exit line of second level whirlwind preheating cylinder, makes after level-one, second level, three-level, Category Four cyclone preheating cylinder preheating respectively
Magnesium carbonate raw material preheating temperature feeds thereafter suspension calcining furnace to 480 DEG C, after 750 DEG C of temperature calcinations of suspension calcining furnace decompose
MgO chamotte powder is formed, feeding suspension cooling system is cooling after the separation of five-stage whirlwind cylinder and separates step by step, most afterwards through telescopic water
Feeding finished bin obtains a kind of light-burned MgO sample M1 after cooling spiral conveyor is cooling, is calculated sample M1 and has a daily output of 1060
Ton, firing heat consumption are 910kCal/kg.cl.Referring to hydropower industry standard DL/T 5296-2013, " concrete for hydraulic structure mixes oxidation
Magnesium technical specification " it detects it is found that the activity of sample M1 is 60s.
Embodiment 2
Open four combustor nozzles of the first combustion system 14,180 ° of two be arranged symmetrically in the second combustion system 15
180 ° of two combustor nozzles being arranged symmetrically in combustor nozzle and third combustion system 16 close the second combustion system 15
With 16 remaining two pairs of combustor nozzles of third combustion system, regulating gas supply keeps the temperature field in suspension calcining furnace steady
It is scheduled on 850 DEG C.By magnesium carbonate powder with the gases exit line of the rate of feeding feeding second level whirlwind preheating cylinder of 90t/h, respectively
Make magnesium carbonate raw material preheating temperature to 500 DEG C after level-one, second level, three-level, Category Four cyclone preheating cylinder preheating, feeding is outstanding thereafter
Floating calcining furnace forms MgO chamotte powder after 850 DEG C of temperature calcinations of suspension calcining furnace decompose, feeds after the separation of five-stage whirlwind cylinder
Suspension cooling system is cooling and separates step by step, and most feeding finished bin obtains one after telescopic water-cooled screw conveyor is cooling afterwards
The light-burned MgO sample M2 of kind is calculated sample M2 and has a daily output of 1040 tons, and firing heat consumption is 940kCal/kg.cl.Referring to water power row
Industry standard DL/T 5296-2013 " concrete for hydraulic structure mixes magnesia technical specification " is detected it is found that the activity of sample M2 is
110s。
Embodiment 3
Open four combustor nozzles of the first combustion system 14, four combustor nozzles of the second combustion system 15, with
And 180 ° of two combustor nozzles being arranged symmetrically in third combustion system 16, close third combustion system 16 remaining two combustions
Burner burner, regulating gas supply stablize the temperature field in suspension calcining furnace at 970 DEG C.By magnesium carbonate powder with 87t/h
Rate of feeding feeding second level whirlwind preheating cylinder gases exit line, it is pre- by level-one, second level, three-level, Category Four cyclone respectively
Make magnesium carbonate raw material preheating temperature to 530 DEG C after hot cylinder preheating, suspension calcining furnace is fed thereafter, through 970 DEG C of temperature of suspension calcining furnace
MgO chamotte powder is formed after spending calcining and decomposing, feeding suspension cooling system is cooling after the separation of five-stage whirlwind cylinder and separates step by step, most
A kind of light-burned MgO sample M3 is obtained by feeding finished bin after the cooling of telescopic water-cooled screw conveyor, through calculating sample M3
1010 tons are had a daily output of, firing heat consumption is 990kCal/kg.cl.Referring to hydropower industry standard DL/T5296-2013 " water conservancy project coagulation
Soil mixes magnesia technical specification " it detects it is found that the activity of sample M2 is 190s.
Embodiment 4
Open four combustor nozzles of the first combustion system 14, four combustor nozzles of the second combustion system 15, with
And 16 4 combustor nozzles of third combustion system, regulating gas supply, stablize the temperature field in suspension calcining furnace
1080℃.By magnesium carbonate powder with the gases exit line of the rate of feeding feeding second level whirlwind preheating cylinder of 81t/h, pass through respectively
Make magnesium carbonate raw material preheating temperature to 550 DEG C after level-one, second level, three-level, Category Four cyclone preheating cylinder preheating, feeding suspends and forges thereafter
Furnace is burnt, MgO chamotte powder is formed after 1080 DEG C of temperature calcinations of suspension calcining furnace decompose, feeds and suspend after the separation of five-stage whirlwind cylinder
Cooling system cooling simultaneously separates step by step, and most feeding finished bin obtains one kind gently after telescopic water-cooled screw conveyor is cooling afterwards
MgO sample M4 is burnt, sample M3 is calculated and has a daily output of 950 tons, firing heat consumption is 1050kCal/kg.cl.Referring to hydropower industry mark
Quasi- DL/T 5296-2013 " concrete for hydraulic structure mixes magnesia technical specification " detection is it is found that the activity of sample M2 is 260s.
Claims (7)
1. a kind of light-burned MgO suspension calcining process units, composition includes raw material cabin, suspension calcining furnace, three sets of combustion systems, two
A emission-control equipment, telescopic water-cooled screw conveyor, finished bin, blower and hygrosensor, which is characterized in that it is formed
It further include the whirlwind preheating cylinder of total Pyatyi, suspension cooling cylinder, the two-step fluidized bed for amounting to three-level；
Wherein the feed opening of raw material cabin is connected to by conveying equipment with the air outlet that second level whirlwind preheats cylinder, and second level whirlwind preheats cylinder
Air outlet be connected by the air inlet that connection air hose and one cyclonic preheat cylinder, the discharge port that one cyclonic preheats cylinder passes through material
It manages and is connected with the air inlet of second level whirlwind preheating cylinder, the air outlet that three-level whirlwind preheats cylinder is pre- by connection air hose and second level whirlwind
The air inlet of hot cylinder is connected, and the discharge port of second level whirlwind preheating cylinder is connected by expects pipe with the air inlet that three-level whirlwind preheats cylinder,
The air outlet of Category Four cyclone preheating cylinder is connected by connection air hose with the air inlet that three-level whirlwind preheats cylinder, and three-level whirlwind preheats cylinder
Discharge port be connected by the air inlet that expects pipe and Category Four cyclone preheat cylinder, the air outlet that five-stage whirlwind preheats cylinder, which passes through, connects wind
It manages and is connected with the air inlet of Category Four cyclone preheating cylinder, the discharge port that Category Four cyclone preheats cylinder passes through the bottom of expects pipe and suspension calcining furnace
Portion's feed inlet is connected, and the top outlet inlet of suspension calcining furnace is connected by connection air hose with the air inlet that five-stage whirlwind preheats cylinder,
The discharge port of five-stage whirlwind preheating cylinder is connected by expects pipe with the air inlet of one cyclonic cooling cylinder, second level whirlwind cooling cylinder outlet air
Mouth is connected by connecting air hose with the air inlet of one cyclonic cooling cylinder, and the discharge port of one cyclonic cooling cylinder passes through expects pipe and one
The bottom feed inlet of grade fluidized bed is connected, and the top outlet inlet of level-one fluidized bed passes through connection air hose and second level whirlwind cooling cylinder
Air inlet is connected, and the discharge port of second level whirlwind cooling cylinder is connected by expects pipe with the bottom feed inlet of second level fluidized bed, secondary streams
The top discharge mouth for changing bed is connected by connecting air hose with the air inlet of three-level whirlwind cooling cylinder, the outlet of three-level whirlwind cooling cylinder
Mouth is connected by air hose with the first emission-control equipment, and the gas outlet of the first emission-control equipment passes through air-introduced machine and chimney phase
Even, the discharge port of three-level whirlwind cooling cylinder is connected with the feed inlet of telescopic water-cooled screw conveyor, and telescopic water-cooling spiral is defeated
The discharge port of machine is sent to be connected with finished bin, the gas outlet that one cyclonic preheats cylinder is filled by high-temperature blower and the second exhaust-gas treatment
It sets, the feed opening of the second emission-control equipment is connected by conveying equipment with the feed opening of raw material cabin.
2. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that suspension calcining furnace is in height
Direction is equipped with three sets of combustion systems, is located at the top, middle part and bottom of suspension calcining furnace, every set combustion system can be independent
Operation, and four combustor nozzles are evenly arranged in suspension calcining furnace radial direction, adjacent burner angle in the horizontal direction is
90°。
3. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that five-stage whirlwind preheats cylinder
Inlet and outlet, the inlet and outlet of suspension calcining furnace, three sets of combustion systems combustor nozzle at, the inlet and outlet of three-level whirlwind cooling cylinder,
The inlet and outlet of two-step fluidized bed are equipped with hygrosensor.
4. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that the blanking of cyclone cylinders at different levels
The flap valve with counterweight balance is equipped on pipe.
5. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that fluidized bed is the cooling that suspends
Heat exchanger and the material processing device that collapses.
6. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that emission-control equipment entrance
Cold blast sliding valve is housed at air hose.
7. light-burned MgO suspension calcining process units according to claim 1, which is characterized in that raw material cabin top and finished product
The top of the warehouse is equipped with roof scrubber.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264248A (en) * | 2018-04-18 | 2018-07-10 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO suspension calcinings production technology and device |
| CN111018369A (en) * | 2019-12-11 | 2020-04-17 | 东北大学 | Magnesite suspension decomposing furnace |
| CN111121459A (en) * | 2019-12-11 | 2020-05-08 | 东北大学 | Distributed heating magnesite suspension furnace and using method thereof |
| CN113621832A (en) * | 2021-08-19 | 2021-11-09 | 中国中材国际工程股份有限公司 | Preparation method of metal magnesium |
-
2018
- 2018-04-18 CN CN201820549436.XU patent/CN208218696U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264248A (en) * | 2018-04-18 | 2018-07-10 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO suspension calcinings production technology and device |
| CN111018369A (en) * | 2019-12-11 | 2020-04-17 | 东北大学 | Magnesite suspension decomposing furnace |
| CN111121459A (en) * | 2019-12-11 | 2020-05-08 | 东北大学 | Distributed heating magnesite suspension furnace and using method thereof |
| CN111018369B (en) * | 2019-12-11 | 2021-10-15 | 东北大学 | Magnesite suspension decomposing furnace |
| CN113621832A (en) * | 2021-08-19 | 2021-11-09 | 中国中材国际工程股份有限公司 | Preparation method of metal magnesium |
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