CN106115747B - A kind of utilization magnesium hydroxide produces the device of magnesia - Google Patents
A kind of utilization magnesium hydroxide produces the device of magnesia Download PDFInfo
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- CN106115747B CN106115747B CN201610677801.0A CN201610677801A CN106115747B CN 106115747 B CN106115747 B CN 106115747B CN 201610677801 A CN201610677801 A CN 201610677801A CN 106115747 B CN106115747 B CN 106115747B
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- dry powder
- magnesia
- magnesium hydroxide
- feeding tank
- calcining
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 96
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title claims abstract description 59
- 239000000347 magnesium hydroxide Substances 0.000 title claims abstract description 59
- 229910001862 magnesium hydroxide Inorganic materials 0.000 title claims abstract description 59
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 112
- 230000007246 mechanism Effects 0.000 claims abstract description 111
- 238000001354 calcination Methods 0.000 claims abstract description 51
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 35
- 239000003345 natural gas Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000004744 fabric Substances 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 25
- 239000000047 product Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 10
- 239000012065 filter cake Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241001131796 Botaurus stellaris Species 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 235000019628 coolness Nutrition 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001425 magnesium ion Inorganic materials 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 235000011837 pasties Nutrition 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
- C01F5/06—Magnesia by thermal decomposition of magnesium compounds
- C01F5/08—Magnesia by thermal decomposition of magnesium compounds by calcining magnesium hydroxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses the device that a kind of utilization magnesium hydroxide produces magnesia, including dry powder device and calciner, dry powder device includes feedstock transportation mechanism and dry powder generating mechanism, calciner includes dry powder conveying mechanism, dry powder preheating mechanism, dry powder calcining mechanism and product cooling mechanism, feedstock transportation mechanism, dry powder generating mechanism, dry powder conveying mechanism, dry powder preheating mechanism, dry powder calcining mechanism and product cooling mechanism are sequentially connected, dry powder generating mechanism includes flash dryer, and dry powder calcining mechanism includes circulation flow dynamic furnace.The present invention is the device that magnesia is produced using magnesium hydroxide, is combined using dry powder device and calciner, can realize making full use of for heat, and energy final production goes out the activated magnesia of high-quality.
Description
Technical field
The present invention relates to the technical field of magnesia production, and in particular to one kind utilizes magnesium hydroxide calcining production active oxygen
Change the device of magnesium.
Background technology
Activated magnesia is to prepare the products such as high function fine inorganic material, electronic component, ink, pernicious gas adsorbent
Important source material, its chemical composition, physical aspect index and common magnesia difference is little, but its size distribution, specific surface area,
The requirement of activity, microscopic pattern and crystal structure and common magnesia is inconsistent.
Qinghai Province of China is dispersed with a large amount of salt lakes, and hydroxide is prepared using the magnesium ion in salt lake bittern and precipitating reagent reaction
Magnesium is a kind of magnesium downstream product that Salt Lake Area chemical plant is generally developed.But common magnesium hydroxide physico-chemical property is undesirable, to carry
Its high value-added content of product, calcination processing need to be carried out to it and magnesia is made.Wherein how to calcine life using the magnesium hydroxide
The activated magnesia of production high-quality is our problems to be solved at this stage.
The content of the invention
It is an object of the invention to provide a kind of device of utilization magnesium hydroxide calcining production activated magnesia, for solving
The problem of how producing the activated magnesia of high-quality using existing common magnesium hydroxide.
To achieve these goals, the present invention provides following technical scheme：A kind of utilization magnesium hydroxide production magnesia
Device, including dry powder device and calciner, the dry powder device include feedstock transportation mechanism and dry powder generating mechanism, described to forge
Burning equipment includes dry powder conveying mechanism, dry powder preheating mechanism, dry powder calcining mechanism and product cooling mechanism, the ingredient conveyor
Structure, dry powder generating mechanism, dry powder conveying mechanism, dry powder preheating mechanism, dry powder calcining mechanism and product cooling mechanism are sequentially connected,
The dry powder generating mechanism includes flash dryer, and the dry powder calcining mechanism includes circulation flow dynamic furnace.
Preferably, the feedstock transportation mechanism includes belt conveyor and feeding tank, and the feeding tank is arranged on the skin
Lower section with conveyer,
The feeding tank includes the first feeding tank and the second feeding tank, the belt conveyor correspondence the first feeding tank
The first scraper plate and the second scraper plate, second scraper plate and the Belt Conveying are respectively arranged with the position of the second feeding tank
Machine is fixedly connected, and first scraper plate is flexibly connected with the belt conveyor, the first feeding tank and second feeding
It is provided with level-sensing device in tank, material position of the level-sensing device in the first feeding tank and the second feeding tank is controlled
First scraper plate rise and fall and the belt conveyor running status.
Preferably, the dry powder generating mechanism also includes air feed system and the first pulsed jet cloth filter, the air feed system
System includes the air cleaner, muffler, air feed machine and the natural gas fired incinerators that are sequentially connected, the natural gas fired incinerators with it is described
The air inlet of flash dryer is connected, and first pulsed jet cloth filter is connected with the discharging opening of the flash dryer.
Preferably, the dry powder preheating mechanism includes primary cyclone, secondary cyclone and preheating feeder,
The exhaust outlet of the primary cyclone is connected with the air inlet of the secondary cyclone by the first pipeline, described
The discharge port of secondary cyclone is connected with the air inlet of the primary cyclone by second pipe, the one-level rotation
The discharge port correspondence preheating feeder of wind separator is set,
The charging aperture of one end correspondence dry powder calcining mechanism of the preheating feeder is set.
Preferably, the calciner also includes circulation and stress mechanism, and the circulation and stress mechanism includes what is be sequentially connected
First-class heat exchanger, secondary heat exchanger, the second sack cleaner and reclaim feeder, the charging aperture of the first-class heat exchanger with it is described
The exhaust outlet of secondary cyclone is connected, and described one end for reclaiming feeder is correspondingly arranged at the upper of the preheating feeder
Side.
Preferably, the dry powder calcining mechanism also includes the eddy flow dynamic calcining being connected with the circulation flow dynamic furnace
Secondary stove and heating system, the heating system include combustion of natural gas room.
Preferably, the product cooling mechanism includes three-stage cyclone separator, the exhaust outlet of the three-stage cyclone separator
It is connected by pipeline with the air inlet of the primary cyclone,
The heating system also includes wind mixed chamber, is arranged between combustion of natural gas room and the circulation flow dynamic furnace,
The three-stage cyclone separator is connected with the wind mixed chamber by pipeline.
Preferably, the device of the utilization magnesium hydroxide production magnesia also includes storage package mechanism, the storage bag
Mounting mechanism includes the 4th sack cleaner, magnesia storage bin, magnesia conveyer and the packing machine set gradually.
Compared to prior art, the device of utilization magnesium hydroxide of the present invention production activated magnesia has following excellent
Gesture：The device that the present invention produces magnesia using magnesium hydroxide is combined using dry powder device and calciner so that feed hydrogen
Magnesia filter cake makes first in dry powder device forms the magnesium hydroxide dry powder that moisture content is less than 1%, is then set by calcining
Standby that magnesium hydroxide dry powder is sintered into magnesia, the final product magnesia of gained is the activated magnesia of high-quality, can be used as original
Material is applied in the manufacturing process such as high function fine inorganic material, electronic component, ink, pernicious gas adsorbent.Using this hair
The waste heat that bright device makes magnesium hydroxide filter cake be converted to after magnesium hydroxide dry powder is fully utilized, and waste heat enters calcining
Continue to carry out heat supply to calciner in equipment, reduce the thermal losses of entirety of the invention, meanwhile, of the invention is automatic
Degree is high, the production of activated magnesia is realized using the present invention, plant area is clean, dust is few.
Magnesium hydroxide dry powder is first subjected to multistage preheating in calciner and then calcined again, the operation of multistage preheating makes hydrogen
Magnesia dry powder has obtained sufficient preheating, and the heat in each stage can also realize the transmission of each pipeline enclosure in warm, from
And making full use of for these heats can be realized, and the warm integrally uses the mode of air-flow conveying, is easy to thing
The heat exchange of material, improves the produce load of the present invention.Recycling has also been carried out to the heat exported in the warm, from
And the utilization rate of heat is improved, reduce the consume of energy.In later stage calcination process, eddy flow dynamic calcining is used
Stove, dry material, which remains unchanged, uses the mode of air-flow conveying, so as to improve the efficiency of calcining, the calcining for reducing material stops
The time is stayed, the activity of product is farthest remained while product purity is improved.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.In the accompanying drawings：
Fig. 1 shows a kind of preferred embodiment of the invention using dry powder in the device of magnesium hydroxide production activated magnesia
The structural representation of environment division.
Fig. 2 shows that a kind of preferred embodiment of the invention is produced using magnesium hydroxide and calcined in the device of activated magnesia
The structural representation of environment division.
Fig. 3 shows that a kind of preferred embodiment of the invention is produced using magnesium hydroxide and stored in the device of activated magnesia
The structural representation of package mechanism part.
Reference：
1- feedstock transportations mechanism, 11- belt conveyors,
12- the first feeding tanks, 13- the second feeding tanks,
The scraper plates of 14- first, the scraper plates of 15- second,
2- dry powder generating mechanism, 21- flash dryers,
22- air feed systems, the pulsed jet cloth filters of 23- first,
221- air cleaners, 222- mufflers,
223- air feed machines, 224- natural gas fired incinerators,
3- dry powder conveying mechanisms, 4- dry powder preheating mechanisms,
41- primary cyclones, 42- secondary cyclones,
43- preheats feeder, and 5- dry powder calcines mechanism,
51- circulation flow dynamic furnaces, 52- eddy flows dynamic calcining pair stove,
53- heating systems, 531- combustion of natural gas room,
532- wind mixed chamber, 6- circulation and stress mechanism,
61- first-class heat exchangers, 62- secondary heat exchangers,
The sack cleaners of 63- second, 64- reclaims feeder,
7- storage packages mechanism, the sack cleaners of 71- the 4th,
72- magnesia storage bins, 73- magnesia conveyers,
74- packing machines, 8- product coolings mechanism,
81- three-stage cyclone separators.
Embodiment
The invention provides many applicable creative concepts, the creative concept can be reflected in a large number of on specific
Hereinafter.Specific embodiment described in following embodiments of the present invention is only as embodiment of the invention
Exemplary illustration, and be not meant to limit the scope of the invention.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the present embodiment provides the device that a kind of utilization magnesium hydroxide produces magnesia, including dry powder
Equipment and calciner, the dry powder device include feedstock transportation mechanism 1 and dry powder generating mechanism 2, and the calciner includes
Dry powder conveying mechanism 3, dry powder preheating mechanism 4 and dry powder calcining mechanism 5, it is the feedstock transportation mechanism 1, dry powder generating mechanism 2, dry
Powder conveying mechanism 3, dry powder preheating mechanism 4 and dry powder calcining mechanism 5 are sequentially connected, and it is dry that the dry powder generating mechanism 2 includes flash distillation
Dry machine 21, the dry powder calcining mechanism 5 includes circulation flow dynamic furnace 51.
Said apparatus, raw material uses magnesium ion in salt lake bittern and reacted with precipitating reagent after the magnesium hydroxide prepared processing
Moisture content in the magnesium hydroxide filter cake of formation, the magnesium hydroxide filter cake is 37%.First using dry powder device to magnesium hydroxide
Filter cake is handled, and by feedstock transportation mechanism 1 magnesium hydroxide filter cake is transported in dry powder generating mechanism 2, in dry powder life
The water evaporation on magnesium hydroxide filter cake surface is fallen by flash dryer 21 into mechanism 2, so as to produce moisture content less than 1%
Magnesium hydroxide dry powder.
Flash dryer 21 is to integrate the continuous chain-belt drying equipment drying, crush, sieving, it is adaptable to filter cake shape, cream
The drying of pasty state, sposh pasty material.It is to enter drier bottom by hot-air tangent line, and being formed under agitator drive has by force
The rotation wind field of power, material is transported to inside drier by feeder, high speed Stirring starch strong effect under, material by
Disperseed in the presence of shock, friction and shearing force, lump material is crushed rapidly, is fully contacted, is heated with hot-air, so that
Reach to the preferable drying effect of material.
Gained magnesium hydroxide dry powder continues to be handled using calciner, and first, obtained magnesium hydroxide dry powder passes through
Dry powder conveying mechanism 3 is transported in dry powder preheating mechanism 4, and the dry powder after preheating is transported in dry powder calcining mechanism 5 and carries out height again
Warm calcination processing, so that magnesium hydroxide is converted into magnesia.Calcining furnace in above-mentioned dry powder calcining mechanism 5 uses eddy flow
Dynamic calcining furnace 51.
Circulation flow dynamic furnace is to carry out the calcining furnace of calcining materials in the way of dynamic suspension, in the application of calcinated powder material
In, after circulation flow dynamic furnace mixes powder with thermal current and make its flow in opposite directions so as to formed high specific surface heat friendship
Change, reach to the calcining of moment of material, so as to ensure the abundant heat exchange to material, decomposition and the quality for improving product.
As shown in figure 1, the feedstock transportation mechanism 1 includes belt conveyor 11 and feeding tank, the feeding tank is arranged on
The lower section of the belt conveyor 11, the feeding tank includes the first feeding tank 12 and the second feeding tank 13, the Belt Conveying
The position of correspondence the first feeding tank 12 of machine 11 and the second feeding tank 13 is respectively arranged with the first scraper plate 14 and second and scraped
Plate 15, second scraper plate 15 is fixedly connected with the belt conveyor 11, first scraper plate 14 and the belt conveyor
11 are flexibly connected, and are provided with level-sensing device in the first feeding tank 12 and the second feeding tank 13, the level-sensing device according to
Material position in the first feeding tank 12 and the second feeding tank 13 controls rising and falling and described for first scraper plate 14
The running status of belt conveyor 11.
Specifically, the first scraper plate 14 and the second scraper plate 15 correspond to the charging of the first feeding tank 12 and the second feeding tank 13 respectively
Mouth position is installed, and is welded with connecting plate on each scraper plate, connecting plate is fixed on to the both sides of belt conveyor 11 using bolt,
And scraper plate is pressed in above belt.Second scraper plate 15 is fixed scraper plate, only serves and is installed additional on the effect of guide, the first scraper plate 14
There is hydraulic means, material position situation automatic lifting/lowering support that can be in feeding tank.When level-sensing device monitors second in the second feeding tank 13
When real material position in feeding tank 13 is less than setting material position, that is, show that the second feeding tank 13 needs feed, now the first scraper plate 14
In lifting status so that the material on belt is admitted in the second feeding tank 13；When the level-sensing device monitoring in the second feeding tank 13
When being equal to or higher than setting material position to real material position, that is, show that the second feeding tank 13 need not be fed, and the first feeding tank simultaneously
When level-sensing device in 12 monitors real material position less than setting material position, i.e., the first feeding of surface tank 12 needs feed, now first
The conversion of scraper plate 14 is in full state, then the material on belt conveyor 11 is transported in the first feeding tank 12.When the first feeding
The level-sensing device in level-sensing device or the second feeding tank 13 in tank 12 monitors that the real material position in feeding tank is equal to or higher than and set
When determining material position, that is, show that the first feeding tank 12 and the second feeding tank 13 need not be fed, now belt conveyor 11 can stop
Operation, and any one level-sensing device monitors real material position less than setting material position in the first feeding tank 12 or the second feeding tank 13
When, then belt conveyor 11 can be made to continue to bring into operation, above-mentioned control operation can be controlled using PLC.
Automatic Conveying for raw material magnesium hydroxide can be realized using the feedstock transportation mechanism 1, and can be according to material
Demand automatically controls the inlet amount of material, so as to improve the intelligence degree of the present apparatus, is more convenient place of the later stage to material
Reason process.
In dry powder device, above-mentioned dry powder generating mechanism 2 also includes the pulsed jet cloth filter 23 of air feed system 22 and first,
The air feed system 22 includes air cleaner 221, muffler 222, air feed machine 223 and the natural gas fired incinerators being sequentially connected
224, the natural gas fired incinerators 224 are connected with the air inlet of the flash dryer 21, first pulsed jet cloth filter
23 are connected with the discharging opening of the flash dryer 21.
Thermogenetic hot gas is provided by calciner is changed for a part of air quantity of air feed system 22 in the present embodiment, another portion
Be divided into air offer, air by air cleaner 221, muffler 222 and hot gas Mixed design into air feed machine 223, and
It is input in the presence of air feed machine 223 in natural gas fired incinerators 224, the flue gas produced of being burnt with natural gas fired incinerators 224 is mixed
Close and be changed into 350 DEG C of hot gas, so as to be the heat supply of flash dryer 21, inside flash dryer 21, magnesium hydroxide filter cake is broken,
It is rapidly dispersed and is met with the hot gas from the air inlet of flash dryer 21, heat exchange is realized inside flash dryer 21,
Magnesium hydroxide moment by heat exchange sloughs surface moisture so as to form the dry powder that moisture content is less than 1%, last in company with dry
The vapor and hot gas of generation together enter in the first pulsed jet cloth filter 23.Pulsed jet cloth filter is in sack cleaner
On the basis of, improved high-efficiency pulse sack cleaner, pulsed jet cloth filter uses locellus blowing-out pulse jetting deashing technology,
The shortcoming of general pulse deduster and blowback dust remover in branch room is overcome, strong with deashing ability, efficiency of dust collection is high, concentration of emission
Low feature.Realize and filter via the first pulsed jet cloth filter 23, enter the first pulsed jet cloth filter 23 after dry powder filtering
In drying intermediate bunker, vapor, tail gas and micro dust are then discharged into exhaust treatment system via exhaust blower or are directly discharged into
Discharged in air.The magnesium hydroxide dry powder part dried in intermediate bunker can be for sale as product, another part
Then it is input to calciner and carries out calcination processing, forms magnesium oxide product.
As shown in Fig. 2 in calciner, the magnesium hydroxide dry powder filtered out from the first pulsed jet cloth filter 23 by
Discharge valve is exported, and is transported to the progress the pre-heat treatment of dry powder preheating mechanism 4 via dry powder conveying mechanism 3 first.The dry powder is pre-
Heat engine structure 4 includes primary cyclone 41, secondary cyclone 42 and preheating feeder 43, the primary cyclone
41 exhaust outlet is connected with the air inlet of the secondary cyclone 42 by the first pipeline, the secondary cyclone
42 discharge port is connected with the air inlet of the primary cyclone 41 by second pipe, the primary cyclone 41
The discharge port correspondence preheating feeder 43 set, one end and the dry powder of the preheating feeder 43 calcine mechanism 5
Charging aperture is correspondingly arranged.Hot gas is filled with the inside of the first pipeline and second pipe.
Cyclone separator is a kind of separation equipment of the separation for gas-solid system or liquid-solid system, and its operation principle is
Be introduced tangentially into by air-flow and cause rotary motion, make solid particle or drop with larger centrifugal inertial force get rid of to outside wall surface and
Separate.Dry powder conveying mechanism 3 uses conveying worm in the present embodiment, and dry powder is transported to one cyclonic point by spiral conveying mechanism
From the exhaust outlet of device 41, then entering for secondary cyclone 42 is delivered directly to via the exhaust outlet of primary cyclone 41
Being full of in air port, the first pipeline between connection primary cyclone 41 and secondary cyclone 42 has 500 DEG C or so streams
Dynamic hot gas, therefore the air-flow in magnesium hydroxide dry powder and pipeline can be mixed preheating, finally entering from secondary cyclone 42
The inside realization that air port is input to secondary cyclone 42 is separated to the first time of material.Wherein, isolated through first time
More than 80% magnesium hydroxide dry powder is exported via the discharge valve of secondary cyclone 42, and is transported to primary cyclone
41 air inlet, connects the second pipe between the exhaust outlet of secondary cyclone 42 and the air inlet of primary cyclone 41
The hot gas for there are 600 DEG C or so is full of in road, therefore, magnesium hydroxide dry powder is mixed preheating again with air-flow in second pipe,
Realize second to material in the last inside that primary cyclone 41 is input to by the air inlet of primary cyclone 41
Separation.The process is the warm to material.In the present embodiment between primary cyclone 41 and dry powder calcining mechanism 5
Preheating feeder 43 is provided with, so that material is passed through by preheating feeder after the discharge valve output of primary cyclone 41
43 be delivered directly to dry powder calcining mechanism 5 in carry out calcination processing.
The warm ensure that the multistage warm-up operation for magnesium hydroxide, not only realize for magnesium hydroxide dry powder
Be fully warmed-up, and the circulation realized for heat in warm-up operations at different levels is made full use of, and the warm is integrally adopted
It is the mode of air-flow conveying, is easy to the heat exchange of material, improves the produce load of the present invention.Meanwhile, multistage the pre-heat treatment
Also optimize powder and the separating effect of other compositions, more conducively later stage calcination operation is smoothed out.
In addition, the utilization rate in order to increase raw material, is provided with and being recycled back to that the exhaust outlet of secondary cyclone 42 is connected
Mechanism 6 is received, the circulation and stress mechanism 6 includes the first-class heat exchanger 61 being sequentially connected, secondary heat exchanger 62, the second bag-type dust
Device 63 and recovery feeder 64, the exhaust outlet phase of the charging aperture of the first-class heat exchanger 61 and the secondary cyclone 42
Even, the discharging end for reclaiming feeder 64 is correspondingly arranged at the top of the preheating feeder 43.
The exhaust outlet of secondary cyclone 42 can discharge the hot gas material for being mingled with magnesium hydroxide dry powder, and the hot gas is led
Enter in circulation and stress mechanism 6 so that hot gas is cooled down via first-class heat exchanger 61 and secondary heat exchanger 62 respectively, the present embodiment
Middle first-class heat exchanger 61 realizes heat exchange using two gas-gas heat exchangers, blasts circulation into gas-gas heat exchanger by cooling air blower
Cold airflow, secondary heat exchanger 62 realizes heat exchange using three gas-liquid heat-exchanges, and cold flow is following of being passed through into gas-liquid heat-exchange
Ring cooling water.After being cooled down via two-stage, temperature of charge is down to 250 DEG C or so, therefore it is transported to the second sack cleaner 63 again
In.Above-mentioned material is from dry powder preheating mechanism 4 and is mingled with magnesium hydroxide dry powder via what secondary cyclone 42 was exported
Hot gas material, its magnesium hydroxide dry powder being mingled be total magnesium hydroxide dry powder amount 20% or so, in the second sack cleaner
In 63, the magnesium hydroxide dry powder that should be exported with air-flow can be flutterred collection and be got off, and finally be transported to preheating again via recovery feeder 64
In feeder 43, and together it is transported in dry powder calcining mechanism 5 and is calcined with the material that is exported by primary cyclone 41
Processing.The structure of feeder 64 is reclaimed in the present embodiment it is also preferred that using feed screw.
Above-mentioned dry powder calcining mechanism 5 also include the eddy flow dynamic calcining pair stove 52 being connected with circulation flow dynamic furnace 51 and
Heating system 53, the heating system 53 includes combustion of natural gas room 531.
Flue gas in combustion of natural gas room 531 is 1400~1500 DEG C, and the hot gas is passed through into circulation flow dynamic furnace 51
In for circulation flow dynamic furnace 51 provide heat, in circulation flow dynamic furnace 51, the magnesium hydroxide dry powder and hot gas being preheated
The hot gas for meeting and being flowed is dispelled rapidly, and magnesium hydroxide dry powder is in circulation flow dynamic furnace 51 in suspension from bottom to top
State, carries out sufficient heat exchange with hot gas, in order to be further ensured that the calcining effect of magnesium hydroxide dry powder, will dynamically be forged from eddy flow
The material exported in burning stove 51 is again fed in the secondary stove of eddy flow dynamic and calcined.Because circulation flow dynamic furnace 51 and eddy flow are dynamic
The secondary stove 52 of state calcining is communicated by pipeline, therefore its hot gas is also what is communicated.Exported via the secondary stove 52 of eddy flow dynamic calcining
Material is product magnesia.
It ensure that the calcining effect of material using two calcining furnaces, it is to avoid calcining is insufficient so as to influenceing product quality
Problem.
The final product magnesia formed via high-temperature calcination need to be cooled down by product cooling mechanism 8, the present embodiment
Middle product cooling mechanism 8 includes three-stage cyclone separator 81, and the exhaust outlet of the three-stage cyclone separator 81 passes through pipeline and institute
The air inlet for stating primary cyclone 41 is connected, and the heating system 53 also includes wind mixed chamber 532, is arranged on combustion of natural gas
Between room 531 and the circulation flow dynamic furnace 51, the three-stage cyclone separator 81 is connected with the wind mixed chamber 532 by pipeline
Connect.
The air outlet of three-stage cyclone separator 81 can discharge 600~700 DEG C of hot gas, by connecting three-stage cyclone separator
Pipeline between 81 air outlets and the charging aperture of primary cyclone 41 is so that the hot gas discharged from air outlet can enter one
Level cyclone separator 41 in so that play a part of supplement primary cyclone 41 in hot gas.In order to save pipe in the present embodiment
Road material and the setting for being easy to pipeline, the pipeline preferably stretched out from the discharge port of secondary cyclone 42, three-level whirlwind point
From the pipeline between the air outlet of device 81 and the charging aperture of primary cyclone 41, two pipelines are set in connection.Three in the present embodiment
Feed bin in level cyclone separator 81 is air-cooled feed bin, cooling wind is provided feed bin using cooling air blower, to realize material
Cooling.
Three-stage cyclone separator 81 is also connected with the wind mixed chamber 532 in heating system 53 by pipeline, specifically by pipe
The air inlet of road connection wind mixed chamber 532 and the air outlet of the air-cooled feed bin of three-stage cyclone separator 81, so that from three-level whirlwind
The hot blast of the air-cooled feed bin air outlet output of separator 81 is input in wind mixed chamber 532, with exporting in combustion of natural gas room 531
Flue gas mixing is the heat supply of circulation flow dynamic furnace 51 jointly.
Having additional product cooling mechanism 8 realizes the quick cooling of the magnesia for output, can be sufficiently reserved oxidation
The activity of magnesium, and the fast package to magnesia is more conducive to, improve the efficiency of whole production line.
In order to further improve the automaticity of the present embodiment, as shown in figure 3, utilization magnesium hydroxide production oxidation
The device of magnesium also include storage package mechanism 7, the storage package mechanism 7 include set gradually the 4th sack cleaner 71,
Magnesia storage bin 72, magnesia conveyer 73 and packing machine 74.
Material realizes the cooling of the first order in product cooling mechanism 8, is then removed via the 4th sack cleaner 71
Dirt processing, the magnesium oxide product after processing is by negative pressure transportation into magnesia storage bin 72, and the magnesia storage bin 72 is air-cooled
Storage bin, can carry out second level cooling treatment, material is medium to be packaged in magnesia storage bin 72, by material to product
Cooling treatment ensure that the final chilling temperature of material twice.Afterwards, after magnesia conveyer 73 and packing machine 74 can be to coolings
Material realize conveying and automatic packing processes.
The device for the utilization magnesium hydroxide production activated magnesia that this preferred embodiment is provided can be realized for each processing rank
Section heat makes full use of, while present apparatus automaticity is high, rate of load condensate high, the activity height of the product magnesia produced,
Yield is high, quality better.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and this
Art personnel can design alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not excluded for depositing
In element or step not listed in the claims.
Claims (7)
1. a kind of utilization magnesium hydroxide produces the device of magnesia, it is characterised in that described including dry powder device and calciner
Dry powder device include feedstock transportation mechanism (1) and dry powder generating mechanism (2), the calciner including dry powder conveying mechanism (3),
Dry powder preheating mechanism (4), dry powder calcining mechanism (5) and product cooling mechanism (8), the feedstock transportation mechanism (1), dry powder generation
Mechanism (2), dry powder conveying mechanism (3), dry powder preheating mechanism (4), dry powder calcining mechanism (5) and product cooling mechanism (8) are successively
It is connected,
The dry powder generating mechanism (2) includes flash dryer (21), and the dry powder calcining mechanism (5) includes eddy flow dynamic calcining
Stove (51)；
The dry powder generating mechanism (2) also includes air feed system (22) and the first pulsed jet cloth filter (23), the air feed system
System (22) includes air cleaner (221), muffler (222), air feed machine (223) and the natural gas fired incinerators being sequentially connected
(224), the natural gas fired incinerators (224) are connected with the air inlet of the flash dryer (21), first pulse bag
Deduster (23) is connected with the discharging opening of the flash dryer (21).
2. utilization magnesium hydroxide according to claim 1 produces the device of magnesia, it is characterised in that the feedstock transportation
Mechanism (1) includes belt conveyor (11) and feeding tank, and the feeding tank is arranged on the lower section of the belt conveyor (11),
The feeding tank includes the first feeding tank (12) and the second feeding tank (13), the belt conveyor (11) correspondingly described the
The position of one feeding tank (12) and the second feeding tank (13) is respectively arranged with the first scraper plate (14) and the second scraper plate (15), institute
State the second scraper plate (15) to be fixedly connected with the belt conveyor (11), first scraper plate (14) and the belt conveyor
(11) it is flexibly connected, level-sensing device, the material position is provided with the first feeding tank (12) and the second feeding tank (13)
Material position of the instrument in the first feeding tank (12) and the second feeding tank (13) controls first scraper plate (14)
Rise and fall and the belt conveyor (11) running status.
3. utilization magnesium hydroxide according to claim 1 produces the device of magnesia, it is characterised in that the dry powder preheating
Mechanism (4) includes primary cyclone (41), secondary cyclone (42) and preheating feeder (43), the one cyclonic
The exhaust outlet of separator (41) is connected with the air inlet of the secondary cyclone (42) by the first pipeline, described two grades
The discharge port of cyclone separator (42) is connected with the air inlet of the primary cyclone (41) by second pipe, and described one
The discharge port correspondence preheating feeder (43) of level cyclone separator (41) is set,
The charging aperture of one end correspondence dry powder calcining mechanism (5) of the preheating feeder (43) is set.
4. utilization magnesium hydroxide according to claim 3 produces the device of magnesia, it is characterised in that the calciner
Also include circulation and stress mechanism (6), the circulation and stress mechanism (6) include be sequentially connected first-class heat exchanger (61), two grades change
Hot device (62), the second sack cleaner (63) and reclaim feeder (64), the charging aperture of the first-class heat exchanger (61) with it is described
The exhaust outlet of secondary cyclone (42) is connected, and the discharging end for reclaiming feeder (64) is correspondingly arranged at the pre- hot sending
The top of material machine (43).
5. utilization magnesium hydroxide according to claim 3 produces the device of magnesia, it is characterised in that the dry powder calcining
Mechanism (5) also includes the secondary stove (52) of eddy flow dynamic calcining being connected with the circulation flow dynamic furnace (51) and heating system
(53), the heating system (53) includes combustion of natural gas room (531).
6. utilization magnesium hydroxide according to claim 5 produces the device of magnesia, it is characterised in that the product cooling
Mechanism (8) includes three-stage cyclone separator (81), and the exhaust outlet of the three-stage cyclone separator (81) passes through pipeline and described one
The air inlet of level cyclone separator (41) is connected,
The heating system (53) also includes wind mixed chamber (532), is arranged on combustion of natural gas room (531) and the eddy flow is dynamically forged
Burn between stove (51), the three-stage cyclone separator (81) is connected with the wind mixed chamber (532) by pipeline.
7. utilization magnesium hydroxide according to claim 1 produces the device of magnesia, it is characterised in that the utilization hydrogen-oxygen
Changing the device of magnesium production magnesia also includes storage package mechanism (7), and the storage package mechanism (7) includes the set gradually
Four sack cleaners (71), magnesia storage bin (72), magnesia conveyer (73) and packing machine (74).
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| CN106587666B (en) * | 2016-12-02 | 2018-11-16 | 辽宁东大干燥煅烧设备有限公司 | A kind of device and method with magnesite flotation concentrate production light calcined magnesia |
| CN106986359B (en) * | 2017-05-22 | 2019-02-15 | 河北镁神科技股份有限公司 | The device and method of chlorinity in product magnesia is reduced in a kind of magnesium hydroxide calcination process |
| CN108101388B (en) * | 2018-01-29 | 2023-03-14 | 沈阳东大东科干燥煅烧工程技术有限公司 | Magnesium carbonate drying and calcining processing center |
| CN108483950A (en) * | 2018-04-18 | 2018-09-04 | 镇江苏博特新材料有限公司 | A kind of high activity MgO roasting techniques and its dedicated unit |
| CN111072055A (en) * | 2019-12-21 | 2020-04-28 | 泰兴冶炼厂有限公司 | Airflow calcinator |
| CN113188292A (en) * | 2021-04-21 | 2021-07-30 | 中国恩菲工程技术有限公司 | Continuous treatment system and method for wet basic magnesium carbonate material |
| CN113666398B (en) * | 2021-08-17 | 2023-04-18 | 安徽金禾实业股份有限公司 | Secondary calcination process of rotary kiln for magnesium oxide production |
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| DE3020881C2 (en) * | 1980-06-02 | 1984-08-09 | Krupp Polysius Ag, 4720 Beckum | Process and plant for the production of sintered magnesite from magnesium hydroxide |
| DE3405298A1 (en) * | 1984-02-15 | 1985-09-05 | Klöckner-Humboldt-Deutz AG, 5000 Köln | SYSTEM AND METHOD FOR CONTINUOUSLY CALCINATING ALUMINUM HYDROXIDE |
| AU2005237179B2 (en) * | 2005-11-25 | 2011-03-17 | Outotec Oyj | Process and plant for producing metal oxide from metal compounds |
| CN101746784B (en) * | 2009-12-11 | 2011-12-28 | 河北科技大学 | Technology for producing active magnesium oxide |
| CN104692435A (en) * | 2015-03-31 | 2015-06-10 | 沈阳鑫博工业技术股份有限公司 | Suspension roasting device and technology for producing multiform aluminum oxide |
| CN105197968A (en) * | 2015-09-15 | 2015-12-30 | 中国科学院过程工程研究所 | Method and device for producing high-purity magnesium oxide and co-producing industrial concentrated hydrochloric acid through partially hydrated magnesium chloride fluidization pyrolysis |
| CN205873916U (en) * | 2016-08-16 | 2017-01-11 | 青海盐湖工业股份有限公司 | Utilize device of magnesium hydroxide production magnesium oxide |
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Application publication date: 20161116 Assignee: Qinghai Salt Lake Haina Chemical Co.,Ltd. Assignor: QINGHAI SALT LAKE INDUSTRY Co.,Ltd. Contract record no.: X2023990000997 Denomination of invention: A device for producing magnesium oxide using magnesium hydroxide Granted publication date: 20171013 License type: Exclusive License Record date: 20240102 |