CN110357138A - A kind of nanometer calcium carbonate injection carbonization method and system - Google Patents
A kind of nanometer calcium carbonate injection carbonization method and system Download PDFInfo
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- CN110357138A CN110357138A CN201910655310.XA CN201910655310A CN110357138A CN 110357138 A CN110357138 A CN 110357138A CN 201910655310 A CN201910655310 A CN 201910655310A CN 110357138 A CN110357138 A CN 110357138A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/26—Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/004—Sparger-type elements
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- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/181—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by control of the carbonation conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2204/00—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices
- B01J2204/002—Aspects relating to feed or outlet devices; Regulating devices for feed or outlet devices the feeding side being of particular interest
Abstract
That there are particle diameter distributions to overcome the problems, such as existing injection carbonization technology is uneven, production efficiency is low and equipment cost is high, the present invention provides a kind of nanometer calcium carbonates to spray carbonization method, including following operating procedure: calcium hydroxide slurry is pumped into injection carbonizer, it is provided with reducing diameter part in the injection carbonizer, the negative-pressure ward carbon dioxide gas that the reducing diameter part generates is passed through by calcium hydroxide slurry high speed and is mixed；It is imported in bubbling tank by the gas-liquid mixture that injection carbonizer is formed by extension, the extension is inserted into liquid level in the bubbling tank hereinafter, unreacted carbon dioxide gas is bubbled in bubbling tank.Meanwhile the invention also discloses a kind of nanometer calcium carbonates to spray carbonization system.Nanometer calcium carbonate injection carbonization method provided by the invention ensure that the dimensional uniformity of nanometer calcium carbonate, reduces the excessive or too small particle accounting of partial size, improves production efficiency.
Description
Technical field
The invention belongs to nanometer calcium carbonate preparation technical fields, and in particular to a kind of nanometer calcium carbonate injection carbonization method and
System.
Background technique
Carbonation process is extremely important in the production procedure of nanometer calcium carbonate.Cerium sulphate crystal technology includes pure technology controlling and process
Technology and addition auxiliary agent control technology, Japanese nanometer calcium carbonate produce the European countries such as Germany based on process control technology
To add based on auxiliary agent control technology.Simply backward carbonizing apparatus, required excessively program-controlled control technological parameter are many and tight
Lattice slightly fluctuate the pattern and size for just influencing particle.But in real production process, there are many process conditions, such as: stone
The content and flow of ash furnace tail gas carbon dioxide, the variation of weather environment temperature etc., are all uncontrollable, and interval is raw
It produces, the quality of each tower is difficult to ensure reproducibility, and the regular appearance of product quality is unstable, seriously constrains nanometer calcium carbonate
Application development, a kind of advanced nanometer calcium carbonate carbonization technology seem particularly significant.
At present, it include traditional interval bubbling carbonation, drum there are many kinds of the carbonization technologies of domestic preparation nanometer calcium carbonate
Bubble stirring carbonization, and multistage spray carbonation, high-gravity carbonation for newly using etc..That there is quality is difficult to control for traditional carbonization technology,
Bad dispersibility, Batch Process are discontinuous, cannot achieve scale and automated production, high production cost, the problems such as energy consumption is high.
Groped by continuous production practices, injection carbonization technology is applied to nanometer calcium carbonate carbonation process, energy by discovery
Efficiently control the particle stable crystal form of nanometer calcium carbonate.
In some special dimensions, there is certain requirement to the particle size range of nanometer calcium carbonate, it is too small or be not inconsistent greatly very much
It closes and requires, however existing injection carbonization technology can not make the hydrogen-oxygen in hydroxide carbon pastes during single injection event is carbonized
Change carbon and be fully converted to nanometer calcium carbonate, while the be carbonized size of the nucleus to be formed of single injection event is also unable to satisfy nanometer calcium carbonate
Requirement, it is also necessary to cyclic spray carbonization treatment is carried out to hydroxide carbon pastes, during multiple circulation, is easy to cause new
It the hydroxide carbon pastes nucleus of generation and repeatedly recycles the nanometer calcium carbonate grown up and dimensionally there is larger difference, so as to cause
Finally obtained nanometer calcium carbonate particle diameter distribution is uneven, while the process repeatedly recycled is also more time-consuming, influences production efficiency.
A kind of existing injection carbonization technology uses continous way carbonation process, i.e., sprays carbonation reaction towers using more sets, by the
The slurry that a set of injection carbonation reaction tower reacts, which is discharged into second set of injection carbonation reaction tower, continues injection carbonization, then
Third set injection carbonation reaction tower is imported, is circuited sequentially until hydroxide carbon pastes are fully converted to nanometer calcium carbonate.This kind of company
Although continuous formula carbonation process improves dimensional uniformity, but the number of devices that a set of technique need to be arranged is more, and equipment cost is higher,
It is unfavorable for actual production use.
Summary of the invention
There is a problem of that particle diameter distribution is uneven, production efficiency is low and equipment cost is high for existing injection carbonization technology,
The present invention provides a kind of nanometer calcium carbonate injection carbonization method and systems.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
On the one hand, the present invention provides a kind of nanometer calcium carbonates to spray carbonization method, including following operating procedure:
Calcium hydroxide slurry is pumped into injection carbonizer, reducing diameter part is provided in the injection carbonizer, passes through hydrogen-oxygen
Change calcium slurry high speed passes through the negative-pressure ward carbon dioxide gas that the reducing diameter part generates and is mixed, the carbon dioxide gas of sucking
Body carries out aerosol dispersion to calcium hydroxide slurry, and calcium hydroxide is carbonized to form nucleus；
It is imported in bubbling tank by the gas-liquid mixture that injection carbonizer is formed by extension, the extension is inserted into
For liquid level in the bubbling tank hereinafter, unreacted carbon dioxide gas is bubbled in bubbling tank, nuclei growth obtains nanometer
Calcium carbonate；
Obtained gas-liquid mixture is imported in buffer by delivery line and carries out gas-liquid separation, the liquid weight after gas-liquid separation
New import in injection carbonizer carries out circular response.
Optionally, when the pH value in buffer reaches 7, stop circular response, slurry is discharged by the buffer.
Optionally, the preparation method of the calcium hydroxide slurry includes:
Lime stone is subjected to calcining, calcium oxide is made, by turning round the ashing of digestion machine, adds water to react to obtain raw pulp, raw pulp is logical
Vibrating screen is crossed, after purification removes thick slag, ageing, adjusts temperature and concentration obtains calcium hydroxide slurry.
Optionally, the carbon dioxide gas that lime stone sintering procedure generates is for spraying carbon dioxide gas in carbonizer
Supply.
Optionally, the liquid in buffer after gas-liquid separation is led after filter membrane sieves by the slurry of filter membrane again again
Enter to spray carbonizer and carries out circular response.
Optionally, the feed liquor temperature of the calcium hydroxide slurry is 25~40 DEG C, and the temperature of charge in the bubbling tank is
30~65 DEG C.
On the other hand, the present invention provides a kind of nanometer calcium carbonates to spray carbonization system, including buffer, bubbling tank, spray
Carbonizer, extension, delivery line, air inlet pipe and circulation pipe are penetrated, gas outlet is provided at the top of the buffer, the circulation pipe connects
Connect the buffer bottom and the injection carbonizer, be provided with flowmeter and jet pump, the circulation on the circulation pipe
Pipe is for the calcium hydroxide slurry in the buffer to be pumped into the injection carbonizer；The air inlet pipe connects the injection
Carbonizer, the air inlet pipe is for providing carbon dioxide gas；The extension is connected to the bottom of the injection carbonizer, institute
It states extension and is inserted into liquid level in the bubbling tank hereinafter, the delivery line is separately connected the top of the bubbling tank and described slow
Rush device.
Optionally, the position that the circulation pipe is connect with the buffer is provided with filter membrane.
Optionally, the injection carbonizer includes jet-sub, inlet chamber, inlet suction port, reducing diameter part and dilatation chamber, described
Inlet chamber, the reducing diameter part and the dilatation chamber are from top to bottom set gradually in vertical direction, and the internal diameter of the inlet chamber is greater than
The reducing diameter part, and gradually undergauge is extremely equal with the internal diameter of the reducing diameter part and is connected to the undergauge for the bottom of the inlet chamber
Portion, the jet-sub are equipped with spout, institute by penetrating the inlet chamber, the bottom of the jet-sub at the top of the inlet chamber
Spout is stated towards the reducing diameter part, the jet-sub connects the circulation pipe, and the inlet suction port accesses institute by horizontal direction
Inlet chamber is stated, the top of the dilatation chamber is connected to the reducing diameter part, and the internal diameter of the dilatation chamber is from top to bottom gradually expanded, institute
State the bottom that extension connects the dilatation chamber.
Optionally, the delivery line accesses the inner cavity of the buffer along a tangential direction.
The nanometer calcium carbonate injection carbonization system provided according to the present invention, is provided with injection carbonizer, mixed by venturi
The principle of clutch sprays the flow at high speed of calcium hydroxide slurry and generates negative pressure, and then carbon dioxide is sucked and is mixed, sucking
Carbon dioxide cuts the carbon dioxide gas sucked in gas-liquid mixed chamber under powerful negative pressure and the collective effect of high-speed jet
It cuts, crush and emulsifies.Strong turbulent flow changes the barometric gradient and concentration gradient between the double films of gas-liquid again, while negative pressure and strong
Strong shearing and stirring promote double membrane interface higher-orders of oscillation, reduce bubble diameter significantly, bubbles number sharply increases, and increases
The specific surface area of bubble greatly reduces resistance to mass tranfer.Abundant atomizing due to injection carbonizer to calcium hydroxide, hydrogen-oxygen
Change calcium slurry based on nucleation process, is formed with a large amount of intensive calcium carbonate nucleus being scattered in slurry in injection carbonizer,
The gas-liquid mixture for forming the calcium hydroxide slurry of nucleus is directed into bubbling tank, while making unreacted carbon dioxide in drum
It is bubbled in bubble tank, so that the calcium carbonate nucleus to be formed is grown up, to improve the effect that calcium hydroxide is converted into calcium carbonate
Rate reduces calcium hydroxide slurry and converts required cycle-index completely, and then ensure that the dimensional uniformity of nanometer calcium carbonate,
The excessive or too small particle accounting of partial size is reduced, production efficiency is improved.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of nanometer calcium carbonate injection carbonization system provided by the invention；
Fig. 2 is its schematic diagram of internal structure for spraying carbonizer of nanometer calcium carbonate injection carbonization system provided by the invention.
Appended drawing reference in Figure of description is as follows:
1, buffer；11, gas outlet；2, circulation pipe；21, flowmeter；22, jet pump；3, bubbling tank；4, extension；5,
Spray carbonizer；51, jet-sub；52, inlet chamber；53, inlet suction port；54, reducing diameter part；55, dilatation chamber；6, delivery line.
Specific embodiment
In order to which the technical problems, technical solutions and beneficial effects solved by the present invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used
To explain the present invention, it is not intended to limit the present invention.
The embodiment of the invention discloses a kind of nanometer calcium carbonates to spray carbonization method, including following operating procedure:
Calcium hydroxide slurry is pumped into injection carbonizer, reducing diameter part is provided in the injection carbonizer, passes through hydrogen-oxygen
Change calcium slurry high speed passes through the negative-pressure ward carbon dioxide gas that the reducing diameter part generates and is mixed, the carbon dioxide gas of sucking
Body carries out aerosol dispersion to calcium hydroxide slurry, and calcium hydroxide is carbonized to form nucleus；
It is imported in bubbling tank by the gas-liquid mixture that injection carbonizer is formed by extension, the extension is inserted into
For liquid level in the bubbling tank hereinafter, unreacted carbon dioxide gas is bubbled in bubbling tank, nuclei growth obtains nanometer
Calcium carbonate；
Obtained gas-liquid mixture is imported in buffer by delivery line and carries out gas-liquid separation, the liquid weight after gas-liquid separation
New import in injection carbonizer carries out circular response.
The nanometer calcium carbonate injection carbonization system is provided with injection carbonizer, by the principle of venturi mixer, makes
The flow at high speed injection of calcium hydroxide slurry generates negative pressure, and then carbon dioxide is sucked and is mixed, and the carbon dioxide of sucking is strong
Under big negative pressure and the collective effect of high-speed jet, the shearing of the carbon dioxide gas in gas-liquid mixed chamber will be sucked, crushes and emulsifies.
Strong turbulent flow changes the barometric gradient and concentration gradient between the double films of gas-liquid again, while negative pressure and intensive shear and stirring promote
Make double membrane interface higher-orders of oscillation, reduces bubble diameter significantly, bubbles number sharply increases, and increases the specific surface of bubble
Product greatly reduces resistance to mass tranfer.Since injection carbonizer is to the abundant atomizing of calcium hydroxide, calcium hydroxide slurry is being sprayed
It penetrates in carbonizer based on nucleation process, is formed with a large amount of intensive calcium carbonate nucleus being scattered in slurry, nucleus will be formed
The gas-liquid mixture of calcium hydroxide slurry is directed into bubbling tank, while rouses unreacted carbon dioxide in bubbling tank
Bubble, makes the calcium carbonate nucleus to be formed grow up, to improve the efficiency that calcium hydroxide is converted into calcium carbonate, reduces hydrogen-oxygen
Change calcium slurry and convert required cycle-index completely, and then ensure that the dimensional uniformity of nanometer calcium carbonate, it is excessive to reduce partial size
Or too small particle accounting, improve production efficiency.
In some embodiments, when the pH value in buffer reaches 7, stop circular response, it will by the buffer
Slurry discharge.
Calcium hydroxide is slightly soluble in water, and calcium hydroxide slurry is greater than 7 in alkalinity, pH value, when the pH value of slurry reaches 7, i.e.,
Show that the calcium hydroxide in calcium hydroxide slurry is fully converted to calcium carbonate, it can reaction was completed.
In some embodiments, the preparation method of the calcium hydroxide slurry includes:
Lime stone is subjected to calcining, calcium oxide is made, by turning round the ashing of digestion machine, adds water to react to obtain raw pulp, raw pulp is logical
Vibrating screen is crossed, after purification removes thick slag, ageing, adjusts temperature and concentration obtains calcium hydroxide slurry.
After the concentration and temperature that regulate calcium hydroxide slurry, it is spare that calcium hydroxide slurry is pumped into liquid storage tower.
In some embodiments, the carbon dioxide gas that lime stone sintering procedure generates is for spraying titanium dioxide in carbonizer
The supply of carbon gas, to realize making full use of for reaction intermediates.
Contain CO2Kiln gas from the Base top contact of calcining kiln, sieve-plate tower washing is sent to after gravitational dust collection, gas is by tower
Bottom is passed through, tower top about 0.7% lime water spray containing CaO, by SO2It washes away Deng acid stronger gas, is then removed by foam
Dirt device and oil water separator equipped with coke, the gas of purification enter surge tank, injection carbonizer are sent to after compressor compresses.
As a preferred embodiment of the present invention, the liquid in buffer after gas-liquid separation leads to after filter membrane sieves
The slurry of filter membrane imports injection carbonizer again again and carries out circular response.
The mesh number of the filter membrane can be as needed the mesh number of nanometer calcium carbonate selected, by by the liquid in buffer
Body carries out membrane filtration, can retain the nanometer calcium carbonate that partial size is met the requirements in a buffer, and the lesser nanometer of partial size
Calcium carbonate, nucleus and unreacted calcium hydroxide are back in injection carbonizer and bubbling tank and are carbonized, to avoid following
The non-uniform problem of partial size caused by the calcium carbonate overgrowth that ring reaction process mid-early stage generates.
In some embodiments, the feed liquor temperature of the calcium hydroxide slurry is 25~40 DEG C, the object in the bubbling tank
Material temperature degree is 30~65 DEG C.
Calcium hydroxide can constantly release heat during carbonization, due to spraying the dioxy of carbonization in injection carbonizer
Change carbon partial pressure is higher, and gas phase diffusion motive force is larger, and carbon dioxide mass transfer rate is fast, improves carbonization speed, therefore sprays carbonizer
Middle carburizing reagent is affected by temperature smaller；It is too high or too low for temperature to be unfavorable for growing up for calcium carbonate nucleus in bubbling tank, pass through
The feed liquor temperature of control calcium hydroxide slurry can avoid its temperature in carburizing reagent and rise too high, so that the temperature in bubbling tank
Degree meets the demand of calcium carbonate nucleus in bubbling tank grown up.
Referring to figure 1 and figure 2, another embodiment of the present invention provides a kind of nanometer calcium carbonate injection carbonization system,
It is described including buffer 1, bubbling tank 3, injection carbonizer 5, extension 4, delivery line 6, air inlet pipe (not shown) and circulation pipe 2
Be provided with gas outlet 11 at the top of buffer 1, the circulation pipe 2 connect the buffer 1 bottom and the injection carbonizer 5,
Flowmeter 21 and jet pump 22 are provided on the circulation pipe 2, the circulation pipe 2 is used for the hydroxide in the buffer 1
Calcium slurry is pumped into the injection carbonizer 5；The air inlet pipe connects the injection carbonizer 5, and the air inlet pipe is for providing
Carbon dioxide gas；The extension 4 is connected to the bottom of the injection carbonizer 5, and the extension 4 is inserted into the bubbling
Liquid level in tank 3 is hereinafter, the delivery line 6 is separately connected top and the buffer 1 of the bubbling tank 3.
In some embodiments, the position that the circulation pipe 2 is connect with the buffer 1 is provided with filter membrane.
The nanometer calcium carbonate in buffer 1 is sieved by the filter membrane, partial size is reached to the particle of size requirement
It is retained in buffer 1, the too small particle of partial size and unreacted calcium hydroxide are back to by circulation pipe 2 and spray 5 He of carbonizer
Continue to be carbonized in bubbling tank 3, guarantees dimensional uniformity.
In some embodiments, the injection carbonizer 5 includes jet-sub 51, inlet chamber 52, inlet suction port 53, undergauge
Portion 54 and dilatation chamber 55, the inlet chamber 52, the reducing diameter part 54 and the dilatation chamber 55 vertical direction from top to bottom successively
Setting, the internal diameter of the inlet chamber 52 are greater than the reducing diameter part 54, and the bottom of the inlet chamber 52 gradually undergauge to it is described
The internal diameter of reducing diameter part 54 is equal and is connected to the reducing diameter part 54, and the jet-sub 51 penetrates institute by the top of the inlet chamber 52
State inlet chamber 52, the bottom of the jet-sub 51 is equipped with spout, and the spout is towards the reducing diameter part 54, the jet-sub
The 51 connection circulation pipes 2, the inlet suction port 53 access the inlet chamber 52, the top of the dilatation chamber 55 by horizontal direction
It is connected to the reducing diameter part 54, the internal diameter of the dilatation chamber 55 is from top to bottom gradually expanded, and the extension 4 connects the dilatation
The bottom of chamber 55.
In some embodiments, the delivery line 6 accesses the inner cavity of the buffer 1 along a tangential direction, is conducive to gas
Liquid mixture imports in buffer 1 along the tangential direction of 1 inner wall of buffer, to make gas-liquid mixture in buffer 1
It spins in inner wall descending motion, is conducive to the efficiency for improving gas-liquid separation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of nanometer calcium carbonate sprays carbonization method, which is characterized in that including following operating procedure:
Calcium hydroxide slurry is pumped into injection carbonizer, reducing diameter part is provided in the injection carbonizer, passes through calcium hydroxide
Slurry high speed passes through the negative-pressure ward carbon dioxide gas that the reducing diameter part generates and is mixed, the carbon dioxide gas pair of sucking
Calcium hydroxide slurry carries out aerosol dispersion, and calcium hydroxide is carbonized to form nucleus；
It is imported in bubbling tank by the gas-liquid mixture that injection carbonizer is formed by extension, the extension is inserted into described
For liquid level in bubbling tank hereinafter, unreacted carbon dioxide gas is bubbled in bubbling tank, nuclei growth obtains nano-calcium carbonate
Calcium；
Obtained gas-liquid mixture is imported in buffer by delivery line and carries out gas-liquid separation, and the liquid after gas-liquid separation is led again
Enter to spray and carries out circular response in carbonizer.
2. nanometer calcium carbonate according to claim 1 sprays carbonization method, which is characterized in that when the pH value in buffer reaches
When to 7, stops circular response, slurry is discharged by the buffer.
3. nanometer calcium carbonate according to claim 1 sprays carbonization method, which is characterized in that the calcium hydroxide slurry
Preparation method includes:
Lime stone is subjected to calcining, calcium oxide is made, by turning round the ashing of digestion machine, adds water to react to obtain raw pulp, raw pulp passes through vibration
Dynamic sieve, after purification removes thick slag, ageing, adjusts temperature and concentration obtains calcium hydroxide slurry.
4. nanometer calcium carbonate according to claim 3 sprays carbonization method, which is characterized in that lime stone sintering procedure generates
Carbon dioxide gas be used to spray the supply of carbon dioxide gas in carbonizer.
5. nanometer calcium carbonate according to claim 1 sprays carbonization method, which is characterized in that in buffer after gas-liquid separation
Liquid after filter membrane sieves, import injection carbonizer again again by the slurry of filter membrane and carry out circular response.
6. nanometer calcium carbonate according to claim 1 sprays carbonization method, which is characterized in that the calcium hydroxide slurry
Feed liquor temperature is 25~40 DEG C, and the temperature of charge in the bubbling tank is 30~65 DEG C.
7. a kind of nanometer calcium carbonate sprays carbonization system, which is characterized in that including buffer, bubbling tank, injection carbonizer, extend
Pipe, delivery line, air inlet pipe and circulation pipe, the buffer top are provided with gas outlet, and the circulation pipe connects the buffer
Bottom and the injection carbonizer, be provided with flowmeter and jet pump on the circulation pipe, the circulation pipe will be for will be described
Calcium hydroxide slurry in buffer is pumped into the injection carbonizer；The air inlet pipe connects the injection carbonizer, described
Air inlet pipe is for providing carbon dioxide gas；The extension is connected to the bottom of the injection carbonizer, and the extension is inserted
Enter the liquid level into the bubbling tank hereinafter, the delivery line be separately connected the bubbling tank top and the buffer.
8. nanometer calcium carbonate according to claim 7 sprays carbonization system, which is characterized in that the circulation pipe delays with described
The position for rushing device connection is provided with filter membrane.
9. nanometer calcium carbonate according to claim 7 sprays carbonization method, which is characterized in that the injection carbonizer includes
Jet-sub, inlet chamber, inlet suction port, reducing diameter part and dilatation chamber, the inlet chamber, the reducing diameter part and the dilatation chamber are perpendicular
Histogram is to from top to bottom setting gradually, and the internal diameter of the inlet chamber is greater than the reducing diameter part, and the bottom of the inlet chamber is gradually
Undergauge is extremely equal with the internal diameter of the reducing diameter part and is connected to the reducing diameter part, and the jet-sub at the top of the inlet chamber by wearing
Enter the inlet chamber, the bottom of the jet-sub is equipped with spout, and the spout connects towards the reducing diameter part, the jet-sub
The circulation pipe is connect, the inlet suction port accesses the inlet chamber, the top of the dilatation chamber and the undergauge by horizontal direction
Portion's connection, the internal diameter of the dilatation chamber are from top to bottom gradually expanded, and the extension connects the bottom of the dilatation chamber.
10. nanometer calcium carbonate according to claim 7 sprays carbonization system, which is characterized in that the delivery line is tangentially
The inner cavity of the buffer is accessed in direction.
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| CN113998905A (en) * | 2021-12-24 | 2022-02-01 | 中南大学 | Dolomite calcined dolomite digestion separation method and device |
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| WO2023115759A1 (en) * | 2021-12-24 | 2023-06-29 | 中南大学 | Dolomite resource deep utilization complete treatment system and method |
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