CN205953544U - Light magnesium carbonate production system - Google Patents
Light magnesium carbonate production system Download PDFInfo
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- CN205953544U CN205953544U CN201620979322.XU CN201620979322U CN205953544U CN 205953544 U CN205953544 U CN 205953544U CN 201620979322 U CN201620979322 U CN 201620979322U CN 205953544 U CN205953544 U CN 205953544U
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Abstract
The utility model discloses a light magnesium carbonate production system, raw materials waste residue (1) gets into circulating mixed stirred tank (5) in proper order behind breaker (2) and rubbing crusher (3), circulating mixed stirred tank (5) interior fluid passage recycle liquid pump (7) and absorber (4) circulation stirring, circulating mixed stirred tank (5) interior fluid passage adds liquid pump (6) and adds carbonators (8), the import of vapour and liquid separator (9) top is connected to carbonators (8) top gas outlet, vapour and liquid separator (9) top exit linkage carbon dioxide gas compressor (12) import, vapour and liquid separator (9) bottom exit linkage circulating mixed stirred tank (5). The utility model relates to a rationally, the carbonic magnesium production method of being applied to this system combines improvement to two kinds of wastes materials, the production light magnesium carbonate, and the by -product recrement plays and turns harm into good, changing waste into valuables as the cement manufacture raw materials.
Description
Technical field
This utility model belongs to industrial waste in recycling economy and recycles field, relates generally to magnesium metal and magnesium alloy gives up
Slag produces the production system of light magnesium carbonate.
Background technology
Light magnesium carbonate is a kind of inorganic chemical product, is mainly used in rubber, cable rubber plastics-insulated layer Vulcanization Process of Rubber
Accelerator, be the raw material that efficient thiofide light magnesium oxide produces, magnesium carbonate is a kind of senior alkali fire resisting again
Material, it is the raw material of Organic chemical products fire retardant magnesium hydroxide again, and in environmental protection industry, it is the removing of gas sweetening, denitration
Agent.It is the raw material that medical magnesium salt and many Veterinary Medicine produce.The traditional outlet chemical products of it or China, can be every year
Country earns foreign exchange multi-billion dollar.
It is raw material that the traditional productive method of chemical engineering of light magnesium carbonate mainly has salt method, halogen double decomposition and dolomite
Dolomite method, weighs more than 70% in China and in the world accounting, for current main production process.
Dolomite method is with dolomite as raw material, releases carbon dioxide through roast dolomite by carbonate decomposition and generates magnesium
With the oxide of calcium, dolime the water digestion generation hydroxide of magnesium calcium and the mixture of water, existed with this mixture
Carry out carbonation reaction in a kind of steel carbonizing apparatus.In reaction, magnesium hydroxide and calcium hydroxide and carbon dioxide and water reaction
The carbonic acid generating occurs neutralization reaction to generate water miscible magnesium bicarbonate, and calcium hydroxide then generates water-insoluble Calcium Carbonate.
After stopped reaction, separate water miscible magnesium bicarbonate and water-insoluble Calcium Carbonate, water soluble carbonate hydrogen magnesium solution isolates use
Steam is pyrolyzed, and generates water-insoluble magnesium carbonate, becomes light magnesium carbonate finished product after dewatered drying, and insoluble carbon
Sour calcium separates after being dried becomes product precipitated calcium carbonate.
Content of the invention
This utility model is in order to solve the problems, such as the recycling of metal current magnesium and magnesium alloy waste residue, there is provided a kind of production
The device systems of light magnesium carbonate.
This utility model adopts the following technical scheme that realization：
A kind of light magnesium carbonate production system, raw material waste residue enters circulation mix and blend successively after disintegrating machine and pulverizer
Groove, in described circulation mix and blend groove, liquid passes through recycle liquid pump and absorber circulation stirring；In described circulation mix and blend groove
Liquid adds carbonators by fluid filling pump, and described carbonators top gas outlet connects gas-liquid separator top inlet, described gas
Liquid/gas separator top exit connects carbon-dioxide gas compressor import, and described gas-liquid separator outlet at bottom connects circulation mix and blend
Groove；Described carbonators bottom gas inlet is connected with carbon-dioxide gas compressor import and external carbon dioxide pipeline simultaneously；Described
Carbonators bottom liquid outlet connects carbodiimide solution accumulator tank, and in described carbodiimide solution accumulator tank, liquid is added to by carbodiimide solution recovery pump
The filter house of belt vacuum filter, filtrate enters pure carbodiimide solution storage tank, described pure carbodiimide solution by Water-ring vacuum unit
In storage tank, liquid adds to pyrolysis groove by pure carbonization liquid pump, and the thermal source of described pyrolysis groove is derived from external steam pipework, described pyrolysis
The top gas outlet of groove is connected with the tube side import of condenser, and the tube side outlet of described condenser is returned by removing mixing circulation groove
Receive water lines to circulation mix and blend groove；The shell side import of described condenser connects external cooling water pipeline, its shell-side outlet even
Take back receipts hot water and remove boiler pipe.
Described pyrolysis groove outlet connects pyrolytic behavior storage tank, and in described pyrolytic behavior storage tank, liquid is added to by pyrolytic behavior delivery pump
Secondary belt vacuum filter filter house, screening is magnesium carbonate filter cake, and filtrate passes through secondary belt vacuum filter vacuum pump set
Enter secondary filter liquid storage tank, in described secondary filter liquid storage tank, liquid is recycled to circulation mix and blend by secondary filtrate pump
Groove；Described magnesium carbonate filter cake delivers to thick light magnesium carbonate bunker, described thick light magnesium carbonate bunker through high angle belt conveyer conveyer
Interior material delivers to dehydrator by dehydrator conveyer, is crushed to finished light magnesium carbonate through finished product grinder after drying.
The said equipment system is applied in following method,
The production method of light magnesium carbonate, comprises the steps：
（1）, broken, pulverize
As shown in figure 1, will stack through long-term, after immersion, pH value assumes magnesium refining waste residue between 7-8 and magnesium alloy melts
Agent slag, referred to as raw material waste residue 1, sequentially pass through disintegrating machine 2 and pulverizer 3, are crushed to the feed powder within 100 mesh after crushing again.
（2）, stir molten leaching
As shown in figure 1, putting into feed powder in circulation mix and blend groove 5, and solid-to-liquid ratio is pressed in normal-temperature water and the mixing of each recycle-water
1：The ratio mixing of 5-6, is squeezed in absorber 4 with recycle liquid pump 8, using negative pressure in absorber, absorbs the powder in crushing process
Dirt, is stirred by cyclic absorption.
（3）, carbonating
A is as shown in figure 1, by process（2）Absorb the serosity fluid filling pump 6 being uniformly mixed and squeeze into the pressure of 15-18M
In liner 316L stainless steel carbonators 8, carbonators is arranged side by side 3, can carry out carbonization it is also possible to carry out carbon successively simultaneously
Change, realize continuous production.Start CO2Compressor 12, concentration is reached more than 95% CO2, add in tower in the pressure more than 0.8MPa
Carry out carbonation reaction, be reacted to solidss MgO in bottom of towe sample liquid outlet sample<When 1.0%, release carbodiimide solution to carbodiimide solution
Accumulator tank 10, puts to solidss MgO in sample liquid outlet sample<5% stops releasing when entering.In tower, liquid feeding inflation is carried out newly again
One wheel carburizing reagent.Finished light magnesium carbonate is the highly concentrated CO being discharged using chemical fertilizer, petroleum refining, biochemical industry2With water in height
The carbonic acid reaction that pressure is formed generates magnesium bicarbonate and extracts.
, as shown in figure 1, carbonization tower top is released in tail gas entrance gas-liquid separator 9, fresh carbon dioxide gas and condensation are de- for b
Tail gas after water enters carbon-dioxide gas compressor 12 import by Valve controlling, and liquid flows to circulation mix and blend groove by Valve controlling
Recycle in 5.
（4）, a vacuum filter
As shown in figure 1, by process（3）A in carbonators release liquid pass through carbodiimide solution pressure itself or recovery pump 11
Add to filtration position on vacuum band-type filter machine 13 band to be filtered, the screening after filtration enters after cleaning section is cleaned from band
Discharge on formula vacuum filter band, once cross filtering residue and include silicon dioxide, calcium oxide and aluminium oxide and a small amount of fluorite, recyclable use
Make cement raw material 32, for manufacture of cement.Filtrate drains into pure carbodiimide solution storage tank 15 through liquid-ring type vacuum pump set 14.
（5）, steam pyrolysis
As shown in figure 1, with pure 16 processes of carbonization liquid pump（4）Filtrate storage tank 15 in filtrate add pyrolysis groove 17
In, use 0.8MPa steam（L1）Add in pyrolysis groove and be pyrolyzed, be pyrolyzed that no magnesium ion, pyrolysis mixed liquor is put in liquid
Enter in pyrolytic behavior storage tank 18.Pyrolysis gas are discharged into using cooling water in condenser 20（L2）Cooling, pyrolysis after cooling is produced
Raw carbon dioxide gass and fresh carbon dioxide gas enter carbon-dioxide gas compressor 12 import.After pyrolysis air cooling, condensed water enters
Condensate storage tank, squeezes into process by condensed water centrifugal pump（1）In circulation mix and blend groove 5, reclaim hot water（L6）, for boiler life
Producing steam.
（6）, secondary filter
As shown in figure 1, by process（5）It is true that secondary belt squeezed into by pyrolysis mixed liquor pyrolytic behavior delivery pump 19 after pyrolysis
Filter on empty filter bank 21 band, discharge after magnesium carbonate filter cake 22 cleaning, filtrate is reclaimed through secondary belt vacuum filter group 23
Enter secondary filter liquid storage tank 24, be then recycled to process through secondary filter pump 25（2）Circulation mix and blend groove 5 in, filtrate
Middle chloride content reaches and carries out chloride recovery utilization during more than 10g/L, is beaten to process with centrifugal pump less than during 1g/L（2）Mixing
It is circulated recovery in circulation liquid bath.
（7）, dry
As shown in figure 1, by process（6）Magnesium carbonate filter cake 22 through over cleaning, adds dehydrator by inclination angle belt conveyor 26
Front crude product bunker 27 is stored, and then adds to dehydrator 29 by dehydrator conveyer 28, uses 0.8MPa steam（Boiler comes
Hot blast L4）Heating, drying, dries to moisture<0.5% is qualified, through finished product grinder 30 after cooling, packs light magnesium carbonate finished product
31 warehouse-ins.
Said method employs another different technique of reaction principle, soluble in water for carbon dioxide using reaction principle
Generate carbonic acid：
CO2+H2O→H2CO3, and generate carbonic acid in acid condition, carbonic acid occur again following react,
CaCO3.MgCO3+CO2+H2O→MgHCO3+CaHCO3→MgHCO3+CaCO3↓ +H2O+CO2↑
Because in carbonation reaction, the MgHCO of generation3Stability is fine, and CaHCO3Decompose to give off CO at normal temperatures2
And water, so it is that Calcium Carbonate state presents in common state calcium.Magnesium, calcium salt is so made to carry out separating under normal temperature condition,
Made by reaction magnesium carbonate.Corner is produced ironmaking flux activity white clouds matter Calx, marble by above-mentioned reaction
Material, the waste residue of carbonization for many years is discharged in magnesium metal factory dolomite barren rock, powder and magnesium refine.And utilize smelting iron and steel, oil
Refining, synthesis medicine, the high concentration CO in magnesium metal production2With the CO by concentrating2With water react generate carbonic acid to dissolve more than
Water miscible magnesium bicarbonate and calcium bicarbonate is generated, calcium bicarbonate is unstable after magnesium carbonate in slag, and Calcium Carbonate, calcium carbonate reaction
Fixed, after pressure, calcium bicarbonate decomposes the insoluble Calcium Carbonate of generation and separates with magnesium bicarbonate, under pressure condition, CO2Pressure is bigger, pH
Less, acidity is stronger, and response speed is faster.On the other hand, CO2The carbonic acid acidity of the higher generation of concentration is stronger, improve pressure and
Increase CO2Concentration is the optimum condition of reaction.
It is applied to the system and produces light magnesium carbonate product, that is, eliminate pollution, produce the change compared with high added value again
Chemical product, reaches elimination pollution, turns harm into good, the purpose of environmental protection and resource utilization fully.
A large amount of magnesium are adsorbed in the flux in the refine and magnesium alloy production of magnesium metal is magnesium refine and magnesium alloy produces
Oxide, after adsorption saturation, flux lost efficacy, after the discharge of the flux of inefficacy, long-time and atmosphere, due to the sprinkling of rainwater,
Chloride in flux slag runs off and is removed, and the magnesium oxide in useless flux, absorbent lime Carbon Dioxide in Air generate carbon
Sour magnesium and Calcium Carbonate, the time is longer, and carbonisation degree is higher, often produces one ton of magnesium metal or magnesium alloy will discharge 0.2--0.35
Flux waste residue about ton.The magnesium metal of China has developed and has had nearly 30 years, and these slags also never have and effectively reclaimed profit
With substantial amounts of slag is pulled away recovery wherein magnesium and Mg-alloy particles and then directly discharged by some of the staff.Therefore waste residue is in some areas
Highly enriched, some areas are deposited in million tons about.In addition, the leftover pieces of Marble processing, grounds travel；Magnesium metal factory white clouds
The granulated slag of stone ore all contains 50% carbonic acid magnesium component, it would however also be possible to employ this system organization produces.
And in the synthesis ammonia plant with coal as raw material, and product is carbamide, when ammonium nitrate etc. is product, ammonia carbon is uneven, also
In some oil coal carbonization factory, synthesis gas purification decarburization has carbon dioxide highly concentrated in a large number to discharge and pollutes.
The method being applied to the system combines improvement two kinds of wastes, produces light magnesium carbonate, and by-product recrement is used as
Cement producting material, plays and turns harm into good, and turns waste into wealth.
This utility model is reasonable in design, and the magnesium carbonate production method being applied to this system is using stacking for many years, wherein original
Magnesium oxide carbonization generate the flux slag of magnesium carbonate composition, the high concentration discharged with industries such as chemical fertilizer, oil, biochemical industries
CO2Waste gas be raw material, under high pressure formed carbonic acid conversion dissolving slag in magnesium carbonate so as to be converted into water soluble carbonate hydrogen magnesium, and
Impurity filtration separations in vacuum filter such as other water-fast Calcium Carbonate, are then pyrolyzed, and dry and make finished product, in filtrate
Villaumite, magnesium ion non-recovery drains into circulation liquid bath and recycles when being worth.
Brief description
Fig. 1 represents the structure connection diagram of utility model.
In figure：1- raw material waste residue, 2- disintegrating machine, 3- pulverizer, 4- absorber, 5- circulates mix and blend groove, 6- circulation fluid
Fluid filling pump, 7- recycle liquid pump, 8- carbonators, 9- tail gas separation groove, 10- carbodiimide solution accumulator tank, 11- carbodiimide solution recovery pump, 12- bis-
Carbonoxide compressor, belt vacuum filter of 13-, 14- Water-ring vacuum unit, 15- pure carbodiimide solution storage tank, the pure carbonization of 16-
Liquid pump, 17- pyrolysis groove, 18- pyrolytic behavior storage tank, 19- pyrolytic behavior delivery pump, 20- condenser, No. bis- belt vacuum filters of 21-,
22- magnesium carbonate filter cake, No. bis- belt vacuum filter vacuum pump set of 23-, 24- secondary filter liquid storage tank, 25- secondary filter liquid
Pump, 26- high angle belt conveyer conveyer, 27- thick light magnesium carbonate bunker, 28- dehydrator conveyer, 29- dehydrator, 30- finished product
Pulverizer, 31- finished light magnesium carbonate, 32- be used as cement raw material, the external steam pipework of L1-, the external cooling water pipeline of L2-,
L3- external carbon dioxide pipeline, L4- boiler carrys out hot-blast pipe line, and L5- removes mixing circulation groove recycle-water pipeline, and L6- reclaims hot water and goes
Boiler pipe.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiment of the utility model is described in detail.
A kind of light magnesium carbonate production system, as shown in figure 1, raw material waste residue 1 is laggard through disintegrating machine 2 and pulverizer 3 successively
Enter to circulate mix and blend groove 5, in described circulation mix and blend groove 5, liquid passes through recycle liquid pump 7 and absorber 4 circulation stirring；Institute
State liquid in circulation mix and blend groove 5 and carbonators 8 is added by fluid filling pump 6, described carbonators 8 top gas outlet connects gas-liquid
Separator 9 top inlet, described gas-liquid separator 9 top exit connects carbon-dioxide gas compressor 12 import, described gas-liquid separation
Device 9 outlet at bottom connects circulation mix and blend groove 5；Described carbonators 8 bottom gas inlet simultaneously with carbon-dioxide gas compressor 12
Import and external carbon dioxide pipeline L3 connect；Described carbonators 8 bottom liquid outlet connects carbodiimide solution accumulator tank 10, described carbon
Change the filter house that liquid in liquid accumulator tank 10 adds to a belt vacuum filter 13 by carbodiimide solution recovery pump 11, filtrate is passed through
Water-ring vacuum unit 14 enters pure carbodiimide solution storage tank 15, and in described pure carbodiimide solution storage tank 15, liquid is added to by pure carbonization liquid pump 16
Pyrolysis groove 17, described pyrolysis groove 17 thermal source be derived from external steam pipework L1, described pyrolysis groove 17 top gas outlet with cold
The tube side import of condenser 20 connects, and the tube side outlet of described condenser 20 is by removing mixing circulation groove recycle-water pipeline L5 to circulation
Mix and blend groove 5；The shell side import of described condenser 20 connects external cooling water pipeline L2, its shell-side outlet connects recovery hot water
Remove boiler pipe L6.
As shown in figure 1, described pyrolysis groove 17 outlet connects pyrolytic behavior storage tank 18, in described pyrolytic behavior storage tank 18, liquid passes through
Pyrolytic behavior delivery pump 19 adds to secondary belt vacuum filter 21 filter house, and screening is magnesium carbonate filter cake 22, and filtrate is passed through secondary
Belt vacuum filter vacuum pump set 23 enters secondary filter liquid storage tank 24, and in described secondary filter liquid storage tank 24, liquid passes through two
Secondary filtrate pump 25 is recycled to circulation mix and blend groove 5；Described magnesium carbonate filter cake 22 is delivered to slightly light through high angle belt conveyer conveyer 26
Matter magnesium carbonate bunker 27, in described thick light magnesium carbonate bunker 27, material delivers to dehydrator 29 by dehydrator conveyer 28, dries
It is crushed to finished light magnesium carbonate 31 through finished product grinder 30 after dry.
Finally it should be noted that above example is only in order to illustrate the technical solution of the utility model and unrestricted, although
It has been described in detail with reference to this utility model embodiment, it will be understood by those within the art that, to this utility model
Technical scheme modify or equivalent, without departure from the spirit and scope of the technical solution of the utility model, it is equal
Should cover in claims of the present utility model.
Claims (1)
1. a kind of light magnesium carbonate production system it is characterised in that：Raw material waste residue（1）Successively through disintegrating machine（2）And pulverizer（3）
Enter circulation mix and blend groove afterwards（5）, described circulation mix and blend groove（5）Interior liquid passes through recycle liquid pump（7）And absorber（4）
Circulation stirring；Described circulation mix and blend groove（5）Interior liquid passes through fluid filling pump（6）Add carbonators（8）, described carbonators（8）
Top gas outlet connects gas-liquid separator（9）Top inlet, described gas-liquid separator（9）Top exit connects pressurized carbon dioxide
Contracting machine（12）Import, described gas-liquid separator（9）Outlet at bottom connects circulation mix and blend groove（5）；Described carbonators（8）Bottom
Gas feed simultaneously with carbon-dioxide gas compressor（12）Import and external carbon dioxide pipeline（L3）Connect；Described carbonators（8）
Bottom liquid outlet connects carbodiimide solution accumulator tank（10）, described carbodiimide solution accumulator tank（10）Interior liquid passes through carbodiimide solution recovery pump
（11）Add to a belt vacuum filter（13）Filter house, filtrate pass through Water-ring vacuum unit（14）Enter pure carbodiimide solution storage
Groove（15）, described pure carbodiimide solution storage tank（15）Interior liquid is by pure carbonization liquid pump（16）Add to pyrolysis groove（17）, described pyrolysis groove
（17）Thermal source be derived from external steam pipework（L1）, described pyrolysis groove（17）Top gas outlet and condenser（20）Tube side
Import connects, described condenser（20）Tube side export by removing mixing circulation groove recycle-water pipeline（L5）To circulation mix and blend
Groove（5）；Described condenser（20）Shell side import connect external cooling water pipeline（L2）, its shell-side outlet connect reclaim hot water go
Boiler pipe（L6）；
Described pyrolysis groove（17）Outlet connects pyrolytic behavior storage tank（18）, described pyrolytic behavior storage tank（18）It is defeated that interior liquid passes through pyrolytic behavior
Send pump（19）Add to secondary belt vacuum filter（21）Filter house, screening is magnesium carbonate filter cake（22）, filtrate is by two sub-band
Formula vacuum filter vacuum pump set（23）Enter secondary filter liquid storage tank（24）, described secondary filter liquid storage tank（24）Interior liquid leads to
Cross secondary filtrate pump（25）It is recycled to circulation mix and blend groove（5）；Described magnesium carbonate filter cake（22）Through high angle belt conveyer conveyer
（26）Deliver to thick light magnesium carbonate bunker（27）, described thick light magnesium carbonate bunker（27）Interior material passes through dehydrator conveyer
（28）Deliver to dehydrator（29）, through finished product grinder after drying（30）It is crushed to finished light magnesium carbonate（31）.
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| CN201620979322.XU CN205953544U (en) | 2016-08-30 | 2016-08-30 | Light magnesium carbonate production system |
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| CN201620979322.XU CN205953544U (en) | 2016-08-30 | 2016-08-30 | Light magnesium carbonate production system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116419910A (en) * | 2020-10-02 | 2023-07-11 | 迪金森公司 | Scalable synthesis of coating materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116419910A (en) * | 2020-10-02 | 2023-07-11 | 迪金森公司 | Scalable synthesis of coating materials |
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