CN108751233A - A method of improving sodium bicarbonate grain size number - Google Patents
A method of improving sodium bicarbonate grain size number Download PDFInfo
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- CN108751233A CN108751233A CN201811011839.XA CN201811011839A CN108751233A CN 108751233 A CN108751233 A CN 108751233A CN 201811011839 A CN201811011839 A CN 201811011839A CN 108751233 A CN108751233 A CN 108751233A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/38—Preparation in the form of granules, pieces or other shaped products
- C01D7/40—Influencing the crystallisation process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D9/0004—Crystallisation cooling by heat exchange
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
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Abstract
The invention discloses a kind of methods improving sodium bicarbonate grain size number, include the following steps：Prepare the saturated solution or supersaturated solution of sodium bicarbonate；The saturated solution of sodium bicarbonate or supersaturated solution are introduced to the device for improving sodium bicarbonate grain size number by material liquid import.The device for improving sodium bicarbonate grain size number includes tank body and central backflow pipe；Tank body is equipped with material liquid import, magma outlet, the outlet of circulating cooling feed liquid axial-flow pump and overflow port.The outlet of circulating cooling feed liquid axial-flow pump is arranged in the middle and upper part of tank body, for the feed liquid in tank body to be drawn cooling；Central backflow pipe is used to introduce feed liquid after cooling in tank body, the cooling feed liquid return duct outlet of central backflow pipe is arranged in the middle and lower part of tank body, to realize the circulating cooling of feed liquid, the Sodium bicarbonate product that grain size is 180~380 μm is made, to meet the needs of to big grain size Sodium bicarbonate product.
Description
Technical field
The invention belongs to sodium bicarbonate production technical fields, and in particular to a kind of device improving sodium bicarbonate grain size number
And method.
Background technology
Sodium bicarbonate is commonly referred to as sodium bicarbonate, also known as acid sodium carbonate, for white or opaque monoclinic system crystal, English
Entitled Sodium Bicarbonate, chemical molecular formula NaHCO3, there is certain solubility in water.Sodium bicarbonate is a kind of
Important inorganic chemical product is widely used in the fields such as chemical industry, light industry, medicine, weaving, food, fine chemistry industry.
China is the important producing country of sodium bicarbonate, has formed million tons or more of scale so far.However traditional carbonic acid
Hydrogen sodium mostly uses soda ash carbonation method and is prepared, and primary raw material is soda ash and carbon dioxide, and chemical equation is：Na2CO3
(aq)+CO2(g)+H2O (l)=2NaHCO3(s)。
The method that soda ash carbonating prepares sodium bicarbonate, core process are the carbonatings of soda ash liquid, and key equipment is carbonization
Tower is operated around carbonization, and other than prepared by necessary material liquid, unstripped gas, it is a series of complicated auxiliary that it is still necessary to purified treatments etc.
Help production process.The technique includes mainly following multiple processes：The preparation and purification of soda ash saturated solution；CO2The preparation of gas
Purification and compression；The precipitation of carbonation reaction and crystallization；The processing of carbonization tail gas；The taking-up stiff of crystallization suspension with detach；
Drying, screening and the packaging of wet basis sodium bicarbonate crystallization.Its main production equipments has choline slot and wet decomposition tower, clarification filtration
Device, carbonators group, tail gas washing tower, thickener, centrifuge, airflow drying tube, screening machine, packing machine etc..In addition it is also useful for
Prepare CO2A series of ancillary equipments such as the decarburization resolution system of unstripped gas or limekiln, deduster and compressor.
Conventionally produced step is mainly：By the soda ash met the requirements raw material-solid soda ash or soda ash liquid, it is made and reaches
It is clarified net to the soda ash supersaturated solution (when sodium bicarbonate content is high need increase high temperature-humidity solution preocess) of required index
With carbonators group (common to have the one group of rotation operation/cleaning of one group of 3 tower or 4 towers) is pumped into after change, pass through dedusting with what is prepared
The CO of purification2Unstripped gas is compressed, adverse current carries out carbonation reaction and generates sodium bicarbonate；Continuous with reaction carries out and temperature
It further decreases, sodium bicarbonate is gradually precipitated from solution in crystalline form after reaching supersaturation；Sodium bicarbonate knot will be contained again
Brilliant suspension takes out, separation, drying, sieves, packaging, and solid sodium bicarbonate product is made.Prepared by the soda ash carbonation method
Sodium bicarbonate, in needle-shaped irregular powdered, hardness is small, fine size, and usual granularity is less than 100 μm.This is for some to grain
Degree has the enterprise of particular/special requirement, such as needs Sodium bicarbonate product even more large-sized sodium bicarbonate of the grain size at 150~300 μm
When product, sodium bicarbonate prepared by traditional soda ash carbonation method cannot be satisfied its requirement.
Invention content
The sodium bicarbonate granularity that the present invention is prepared for traditional soda ash carbonation method is small, limits sodium bicarbonate certain
Application problem within the scope of granularity requirements provides a kind of device and method improving sodium bicarbonate grain size number.
The present invention also provides a kind of method improving sodium bicarbonate grain size number, the raising sodium bicarbonate grain size numbers
Method using improve sodium bicarbonate grain size number device sodium bicarbonate is recrystallized, include the following steps：
Prepare the saturated solution or supersaturated solution of sodium bicarbonate；
The saturated solution of the sodium bicarbonate or supersaturated solution are introduced into the raising carbon by the material liquid import
The device of sour hydrogen sodium grain size number；
The device for improving sodium bicarbonate grain size number includes tank body and central backflow pipe；
The tank body is equipped with material liquid import, magma outlet, the outlet of circulating cooling feed liquid axial-flow pump and overflow port；
The material liquid import is used to introduce the saturated solution or supersaturated solution of sodium bicarbonate；
The magma outlet by magma for drawing the tank body；
The circulating cooling feed liquid axial-flow pump outlet is arranged in the middle and upper part of the tank body, is used for the material in the tank body
Liquid draws cooling；
The overflow port is arranged at the top of the tank body, for excessive feed liquid in the tank body to be discharged；
The central backflow pipe is used to introduce feed liquid after cooling in the tank body, the cooling material of the central backflow pipe
The outlet of liquid return duct is arranged in the middle and lower part of the tank body.
The magma outlet is oppositely arranged on the material liquid import on the tank body in one of the embodiments,.
The material liquid import is arranged at the 1/4~1/2 of the tank body height in one of the embodiments,.
The central backflow pipe is arranged in the inside of the tank body, the central backflow pipe in one of the embodiments,
Cooling feed liquid return duct outlet be less than the material liquid import.
The circulating cooling feed liquid axial-flow pump outlet is arranged in the top of the tank body, institute in one of the embodiments,
The cooling feed liquid return duct outlet for stating central backflow pipe is arranged in the bottom of tank body.
The device for improving sodium bicarbonate grain size number further includes driver in one of the embodiments, the drive
Dynamic device draws the tank body for the circulating cooling feed liquid and provides driving force.
It is described into entering after the saturated solution or supersaturated solution of device and the cooling in one of the embodiments,
The feed liquid temperature difference in the central backflow pipe is 5~25 DEG C.
The temperature of the saturated solution or supersaturated solution is 50~70 DEG C in one of the embodiments,.
After the method for above-mentioned raising sodium bicarbonate grain size number, saturated solution of sodium bicarbonate or supersaturated solution enter tank body
Converge one with the solution that sodium bicarbonate crystal seed is added in tank in advance, by circulating cooling feed liquid axial-flow pump extraction system together,
It is returned in tank from center return duct after completing cooling.With the lasting progress that feed liquid circulation cools down, feed liquid forms under in tank
Supreme fluidized state.For feed liquid after cooling with the contact process of original sodium bicarbonate crystal seed in tank, degree of supersaturation is gradual
It disappears, crystallizes constantly growth, and the fluidisation magma layer of sodium bicarbonate is formd in tank body lower part.Material liquid constantly enters, cycle
Cooling constantly to carry out, crystallization is constantly grown up.It is drawn when crystal growth to target grain size is exported from magma, further passes through stiff
The Sodium bicarbonate product of various target grain sizes is made in the processes such as separation, drying, sieve classification.Sodium bicarbonate is saturated by the device
Solution or supersaturated solution make crystal Sustainable Growth to target grain size in such a way that circulating cooling passes through magma layer, to be made
The Sodium bicarbonate product that grain size is 180~380 μm, to meet the needs of to big grain size Sodium bicarbonate product.
Description of the drawings
The apparatus structure schematic diagram of the raising sodium bicarbonate grain size number of Fig. 1 one embodiment of the invention；
Fig. 2 tradition carbonation methods prepare Sodium bicarbonate product process flow chart；
The method that Fig. 3 present invention improves sodium bicarbonate grain size number prepares Sodium bicarbonate product process flow chart.
Wherein, 110- tank bodies；111- material liquid imports；112- magmas export；113- circulating cooling feed liquid axial-flow pumps export；
114- overflow ports；120- central backflow pipes；121- cools down the outlet of feed liquid return duct；200- circulating cooling feed liquid central backflow pipes enter
Mouthful.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific implementation mode pair
The present invention is further described.It should be appreciated that the specific embodiments described herein are only used to explain the present invention, but simultaneously
It is not used in the restriction present invention.
It please refers to Fig.1 with shown in Fig. 3, the method for the raising sodium bicarbonate grain size number of one embodiment of the invention uses raising
The device of sodium bicarbonate grain size number recrystallizes sodium bicarbonate, includes the following steps：
Prepare the saturated solution or supersaturated solution of sodium bicarbonate；
The saturated solution of sodium bicarbonate or supersaturated solution are introduced by material liquid import 111 and improve sodium bicarbonate crystallization
The device of granularity.
Wherein, the device for improving sodium bicarbonate grain size number includes tank body 110 and central backflow pipe 120, and tank body 110 is set
There are material liquid import 111, magma outlet 112, circulating cooling feed liquid axial-flow pump outlet 113 and overflow port 114.Material liquid import
111 saturated solution or supersaturated solution for introducing sodium bicarbonate, magma outlet 112 are followed for magma to be drawn tank body 110
Ring cooling feed liquid axial-flow pump outlet 113 is arranged in the middle and upper part of tank body 110, for the feed liquid in tank body 110 to be drawn cooling, overflows
Head piece 114 is arranged at the top of tank body 110, and for excessive feed liquid in tank body 110 to be discharged, central backflow pipe 120 is used for will
Feed liquid after cooling introduces in tank body 110, and the cooling feed liquid return duct outlet 121 of central backflow pipe 120 is arranged in tank body 110
Middle and lower part.
The method of above-mentioned raising sodium bicarbonate grain size number, the feed liquid in tank body 110 pass through circulating cooling feed liquid axial-flow pump
Outlet 113 is drawn after the cooling equipment cooling in outside, then through circulating cooling feed liquid central backflow tube inlet 200 from center return duct
120 cooling feed liquid return duct outlet 121 returns in tank body 110.The saturated solution of sodium bicarbonate entered from material liquid import 111
Or after supersaturated solution cooling, the fluosolids containing sodium bicarbonate crystal seed, degree of supersaturation is passed through to disappear, crystalline growth.With original
Feed liquid is continuously introduced into, the circulating cooling of solution in tank, and degree of supersaturation constantly disappears when feed liquid passes through fluidization magma layer after cooling
It loses, crystal is constantly grown up.It is drawn when crystal growth to target grain size can export 112 from magma, further detached by stiff,
The Sodium bicarbonate product of various target grain sizes is made in the processes such as drying, sieve classification.The device by saturated solution of sodium bicarbonate or
Supersaturated solution makes crystal Sustainable Growth to target grain size in such a way that circulating cooling passes through magma layer, is to which grain size be made
180~380 μm of Sodium bicarbonate product, to meet the needs of to big grain size Sodium bicarbonate product.
The method of the raising sodium bicarbonate grain size number of the present invention is recrystallized in sodium bicarbonate crystallization process using physics
Two main equipments are used only in method --- and the device and choline slot for improving sodium bicarbonate grain size number are achieved that bicarbonate
The granulation function of the crystallization of sodium, flow are simple and convenient to operate.Compared with traditional carbonation reaction technique, instead of traditional 3
The carbonators group of the marshalling rotation operation of one group of one group of tower or 4 towers, eliminates complicated switching flow, utilization rate of equipment and installations significantly carries
It is high.Due to the carbonation reaction of not no lye, system does not need CO2The participation of unstripped gas, thus eliminate gas making, purification, pressure
Cumbersome interminable production process and a series of relevant devices such as contracting and carbonization, vent gas treatment, alleviate environmental protection pressure, have broken away from not
The constraint easily independently founded the factory, also avoids restriction of the relevant apparatus to sodium bicarbonate production capacity, greatly simplifies technological process, subtract
Project land used is lacked, has saved construction investment, the risk of project construction and operation difficulty is made to be greatly reduced.
Closer, the device of sodium bicarbonate grain size number is improved with regulatory function is buffered strongly, can be passed through
The regulation and control of technological parameter, produce the Sodium bicarbonate product of different-grain diameter range, and then meet the specific demand of different user.
It please refers to shown in Fig. 2, traditional prepares sodium bicarbonate technique using carbonators, and carbonization and crystallization are simultaneously in carbonators
The sodium bicarbonate crystallization of middle progress, precipitation is nearly all needle-shaped, it is difficult to which coarse crystalline particle is made, makes to need certain particle size
The application of Sodium bicarbonate product is restricted.Further, since carbonators assumes responsibility for chemically reacting and being precipitated the dual work of crystallization
With scabbing in production process is just inevitable, in order to realize the continuity of production, it has to which use organizes into groups rotation to tower
Carry out operation/cleaning mode of operation, cause carbonization system pipeline it is intensive, control it is cumbersome, complicated for operation.
The method that the present invention improves sodium bicarbonate grain size number makes saturated solution of sodium bicarbonate or supersaturated solution using stream
Change magma layer constantly to grow up crystallization, the phenomenon that scabs considerably reduces, realizes the continuity of production, reduce and prepare big grain size carbon
The production control difficulty of sour hydrogen sodium crystal.
Further, when carbonation method prepares sodium bicarbonate, for the progress of carbonation reaction, soda ash and CO2It is necessary
Two kinds of base stocks, and CO2The acquisition of unstripped gas or need to depend on the decarbonizing section of synthetic ammonia installation or self-built
Limekiln gas making.Not only complex process flow is tediously long for this system, and system operatio difficulty is big, the production capacity of device also often by
To full factory CO2The balance of air source and restriction；And the purified treatment of the complicated cumbersome gas making and various tail gas thus brought, no
It is big only to invest high construction land, region environmental protection is also closely bound up therewith, results in the extreme difficulties of project site selection.In CO2Air source
Deficient, construction place is limited, under the premise of environmental requirement height, and the device of raising sodium bicarbonate grain size number of the invention is not required to
CO2 air sources are depended on, the Sodium bicarbonate product of big granularity can be only produced by physics mode, you can independently founds the factory and exempts place
Limitation, and not will produce pernicious gas or excessive sewage, reduce environmental protection pressure and maintenance cost.
As a kind of optional embodiment, since the circulating cooling feed liquid axial-flow pump outlet 113 of the device is arranged in tank body
The cooling feed liquid return duct outlet 121 of 110 middle and upper part, central backflow pipe 120 is arranged in the middle and lower part of tank body 110, tank body 110
Interior feed liquid just naturally forms flowing from bottom to top, and because of gravity relationship, and magma layer is formed in the lower part of tank body.Magma goes out
Mouthfuls 112 are separately positioned on material liquid import 111 on tank body 110, and are oppositely arranged on the both sides of tank body 110, on the one hand to keep away
The saturated solution or supersaturated solution for exempting from the introducing of import 111 generate disturbance to established magma layer in tank, influence crystallization at
It is long；On the other hand stable magma layer is kept, the extraction for good sodium bicarbonate crystal of being more convenient for growing up.Optionally, magma goes out
Mouthfuls 112 with material liquid import 111 can also other modes, such as 111 scattering device of material liquid import in tank body 110 wall surface with
It avoids causing the stabilization for disturbing to influence magma layer to the feed liquid in tank body 110.
As a kind of optional embodiment, material liquid import 111 is arranged at the 1/4~1/2 of 110 height of tank body, can make
The saturated solution or supersaturated solution of sodium bicarbonate have larger flow distance, in order to the saturated solution or mistake of sodium bicarbonate
Saturated solution can be sufficiently mixed in 110 inside of tank body with feed liquid in tank.
As a kind of optional embodiment, central backflow pipe 120 is arranged in the inside of tank body 110, central backflow pipe 120
Cooling feed liquid return duct outlet 121 is less than material liquid import 111.Since the cooling feed liquid return duct of central backflow pipe 120 exports
121 are less than material liquid import 111, and when feed liquid flowing in tank body 110, feed liquid after cooling is exported from cooling feed liquid return duct
121 enter and tank bodies 110 and flow from bottom to top, thus with the saturated solution of sodium bicarbonate or supersaturation that are entered by higher position
Solution mixes, it is made to cool down and further in the crystal that magma layer crystalline growth is greater particle size.In other embodiments, center
Return duct 120 can also be arranged in the outside of tank body 110, be stretched into inside tank body 110 via the bottom of tank body 110 to make center
The cooling feed liquid return duct outlet 121 of return duct 120 is located in tank body 110 and is less than material liquid import 111.
Optionally, the circulating cooling feed liquid axial-flow pump outlet 113 is arranged in the top of the tank body 110, central backflow
The cooling feed liquid return duct outlet 121 of pipe 120 is arranged in the bottom of tank body 110, so that the feed liquid in tank body 110 is in entire tank body
Flowing is formed in 110 height, so that the feed liquid in tank body 110 fully drives saturated solution or the supersaturation of the sodium bicarbonate of introducing
Solution is simultaneously mixed.
Optionally, tank body 110 can be waney cylindrical tank 110, it is preferable that 110 internal diameter of tank body is from the bottom to top
Gradually increase, so that the feed liquid rate of climb in tank body 110 is gradually reduced, consequently facilitating the layering of crystal and liquid.
As a kind of optional embodiment, the device for improving sodium bicarbonate grain size number further includes driver, and driver is
Circulating cooling feed liquid draws tank body 110 and provides driving force.Optionally, driver can be axial-flow pump.Axial-flow pump will be in tank body 110
Feed liquid extraction exchange heat with external cooling equipment feed liquid made to cool down, then feed liquid after cooling is sent back to by central backflow pipe 120
In tank body 110, the fluidised form of feed liquid in the circulating cooling and tank body 110 to form 110 feed liquid of tank body and external cooling equipment
Change.
In the device for improving sodium bicarbonate grain size number, the feed liquid in tank body 110 passes through circulating cooling feed liquid axial-flow pump
Outlet 113 is returned from the cooling feed liquid return duct of center return duct 120 outlet 121 in tank bodies 110 after drawing cooling, after cooling
Feed liquid make tank body lower part formed sodium bicarbonate crystallization fluosolids, from material liquid import 111 enter saturated solution of sodium bicarbonate or
Supersaturated solution is contacted with the feed liquid layer containing crystal seed, and degree of supersaturation disappears, and crystallizes constantly growth.With material liquid import 111
The saturated solution of sodium bicarbonate or supersaturated solution being continuously introduced into, feed liquid after cooling in tank body 110 it is continuous cycle and
Degree of supersaturation fades away when saturated solution of sodium bicarbonate or supersaturated solution pass through the magma layer, and crystal is constantly grown up.When
Crystal growth can export 112 from magma to target grain size and draw, and further pass through the works such as stiff separation, drying, sieve classification
The Sodium bicarbonate product of target grain size is made in sequence.Saturated solution of sodium bicarbonate or supersaturated solution are flowed continuously through crystalline substance by the device
Make the crystal Sustainable Growth of magma layer to target grain size when pulp layer, to which more large-sized sodium bicarbonate crystal be made, to
The Sodium bicarbonate product for being 180~380 μm to grain size.
It should be noted that the processes such as stiff separation, drying, sieve classification, the mixed packaging of ginseng, can be used traditional handicraft into
Row influences less on preparing large-sized Sodium bicarbonate product.
It please compare refering to shown in Fig. 2 and Fig. 3, the method for raising sodium bicarbonate grain size number of the invention and traditional carbonic acid
Change reaction process to compare, instead of the carbonators group of the marshalling rotation operation of traditional one group of one group of 3 tower or 4 towers, eliminate multiple
Miscellaneous switching flow, utilization rate of equipment and installations significantly improve.Further, since the carbonation reaction of lye, system do not need CO2It is former
Expect the participation of gas, thus also eliminate the cumbersome interminable production technology such as gas making, purification, compression and carbonization, vent gas treatment, mitigates
Environmental protection pressure, has broken away from the constraint for being not easy independently to found the factory, also avoids restriction of the relevant apparatus to sodium bicarbonate production capacity, greatly
Ground simplifies technological process, and flow is simple, easy to operate.
Optionally, saturated solution of sodium bicarbonate or supersaturated solution are using powdered sodium bicarbonate as raw material, in choline slot
Add a certain amount of water and dissolve by heating, saturated solution of sodium bicarbonate or supersaturated solution is made.It is alternatively possible to from overflow port
The feed liquid of 114 recycling substitutes part water and prepares saturated solution of sodium bicarbonate or supersaturated solution, can also pass through stiff with magma
Isolated filtrate substitutes part water and prepares saturated solution of sodium bicarbonate or supersaturated solution, to improve the utilization ratio of raw material
With the yield of big grain size Sodium bicarbonate product.Saturated solution of sodium bicarbonate or supersaturated solution are pumped by material liquid import 111
To tank body 110, the axial-flow pump at top by tank body 110 saturated solution of sodium bicarbonate or supersaturated solution pass through circulating cooling
Feed liquid axial-flow pump outlet 113 is continuously introduced into mating be arranged and is cooled down in external cooler, and passes through central backflow pipe 120
It returns in tank body 110.Along with the cycle of a large amount of feed liquids, the feed liquid containing crystal seed and the sodium bicarbonate entered in tank body 110 are full
It is mixed with solution or supersaturated solution, and forms magma layer.When the crystal size of magma layer reaches target grain size, you can pass through
Draw tank body 110 in magma outlet 112.Optionally, since material liquid import and magma outlet 112 are oppositely disposed at tank body 110
On, by controlling the flow of material liquid import 111 and magma outlet 112, the sodium bicarbonate magma containing target grain size can be made
Constantly draw tank body 110.
As a kind of optional embodiment, in tank solution with it is cooling after to enter the feed liquid temperature difference in central backflow pipe 120 be 1
℃.Solution will influence crystalline rate and granularity with after cooling into the feed liquid temperature difference in central backflow pipe 120 in tank before cooling
Size, the temperature difference is bigger, and crystalline rate is faster, but formed crystal particle diameter it is smaller；The temperature difference is smaller, and crystalline rate is slower, but
It is the crystal that can form greater particle size.The present invention passes through verification experimental verification by largely studying, when feed liquid cools down front and back temperature
Difference be 1 DEG C when, can larger proportion formed grain size be more than 150 mesh sodium bicarbonate crystal, especially when the temperature difference be less than 1 DEG C when,
Form the ratio higher of big grain size Sodium bicarbonate product.
Still optionally further, the temperature of saturated solution or supersaturated solution is 50~70 DEG C.Saturated solution or supersaturation are molten
The temperature of liquid influences the sodium bicarbonate content dissolved in solution, and temperature is higher, and the sodium bicarbonate of dissolving is more, but temperature mistake
Height, the ratio that sodium bicarbonate is decomposed into sodium carbonate will greatly increase.The present invention is by the temperature of saturated solution or supersaturated solution
Control is 50~70 DEG C, and the content of sodium bicarbonate in solution can either be made as more as possible, can also reduce its resolution ratio as far as possible,
Keep Sodium bicarbonate product quality higher obtained, overall cost lower.
The study found that circulating cooling feed liquid axial-flow pump outlet 113 and the flow-rate ratio of material liquid import 111 will influence preparation
The size of Sodium bicarbonate product granularity, flow-rate ratio is bigger, the nucleus in saturated solution of sodium bicarbonate or supersaturated solution and feed liquid
Contact is more abundant, then the crystal formed is bigger.
Embodiment 1
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, adds water and makes mother liquor temperature in slot
Degree is maintained at 60 DEG C, and powdery sodium bicarbonate raw material, which can be completely dissolved in water, forms saturated solution.By saturated solution of sodium bicarbonate
Only with 0.16m3The small flow of/h introduces in the tank body 110 of about 40 DEG C of feed temperature, and setting circulating cooling feed liquid axial-flow pump exports
113 circulating cooling flow is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C by the cooling equipment in outside by/h
Hereinafter, and by the cooling feed liquid return duct of 120 bottom of central backflow pipe outlet 121 return tank bodies 110 in, to be slightly below tank body
The temperature of feed liquid passes through magma layer, degree of supersaturation to disappear in 110, crystal growth.With 0.13m3The flow of/h is by magma from magma
Outlet 112 is drawn, and extra clear feed liquid is flowed out from the overflow port 114 at top in tank body 110.The clear feed liquid is recyclable to be used for carbonic acid
The preparation of hydrogen sodium saturated solution or supersaturated solution, magma are further produced by stiff separation, dry obtained granular sodium bicarbonate
The size distribution of product, the granular Sodium bicarbonate product is as shown in table 1.
Embodiment 2
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, add water and is heated to 50 DEG C,
So that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.12m3The flow of/h
It introduces in the tank body 110 that feed temperature is 40 DEG C, the circulating cooling flow that setting circulating cooling feed liquid axial-flow pump exports 113 is
2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C or less and by central backflow pipe by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottoms returns in tank body 110, and the temperature to be slightly below feed liquid in tank body 110 passes through crystalline substance
Pulp layer, degree of supersaturation disappear, crystal growth, with 0.10m3The flow of/h draws magma from magma outlet 112, in tank body 110
Extra clear feed liquid is flowed out from the overflow port 114 at top.The clear feed liquid recycling is molten for saturated solution of sodium bicarbonate or supersaturation
Further granular Sodium bicarbonate product is made by stiff separation, drying in the preparation of liquid, magma, the granular Sodium bicarbonate product
Size distribution is as shown in table 1.
Embodiment 3
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 70
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms saturated solution.By saturated solution of sodium bicarbonate with 0.20m3The stream of/h
Amount introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling flow
For 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and being returned by center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of flow tube returns in tank body 110, and the temperature to be slightly below feed liquid in tank body 110 is worn
Magma layer is crossed, degree of supersaturation disappears, crystal growth.With 0.17m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 4
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms saturated solution.By saturated solution of sodium bicarbonate with 0.16m3The stream of/h
Amount introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling flow
For 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C and by central backflow pipe 120 by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of bottom returns in tank body 110, and the temperature to be slightly below feed liquid in tank body 110 passes through magma
Layer, degree of supersaturation disappear, crystal growth.With 0.13m3The flow of/h draws magma from magma outlet 112, more in tank body 110
Remaining clear feed liquid is flowed out from the overflow port 114 at top.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or supersaturated solution
Preparation, magma further passes through stiff separation, dry granular Sodium bicarbonate product, the grain of the granular Sodium bicarbonate product is made
Degree distribution is as shown in table 1.
Embodiment 5
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.16m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and passing through center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of return duct returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.12m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 6
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.16m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and passing through center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of return duct returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.15m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 7
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.16m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and being returned by center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of flow tube returns in tank body 110, and the temperature to be slightly below feed liquid in tank body 110 is worn
Magma layer is crossed, degree of supersaturation disappears, crystal growth.With 0.14m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 8
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.12m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and being returned by center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of flow tube returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.11m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 9
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.14m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 4,0 DEG C hereinafter, and passing through center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of return duct returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.12m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 10
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.18m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and passing through center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of return duct returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.15m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Embodiment 11
Sodium bicarbonate crystal is prepared with the device shown in FIG. 1 for improving sodium bicarbonate grain size number.
The powdery sodium bicarbonate raw material of 150 mesh (100 μm of granularity <) is added in choline slot, water is added and is heated to 60
DEG C, so that powdery sodium bicarbonate is completely dissolved in water and forms supersaturated solution.By saturated solution of sodium bicarbonate with 0.16m3/ h's
Flow introduces in the tank body 110 that feed temperature is about 40 DEG C, and setting circulating cooling feed liquid axial-flow pump exports 113 circulating cooling stream
Amount is 2.0m3Feed liquid in tank body 110 is drawn and is cooled to 40 DEG C hereinafter, and passing through center by the cooling equipment in outside by/h
The cooling feed liquid return duct outlet 121 of 120 bottom of return duct returns in tank body 110, to be slightly below the temperature of feed liquid in tank body 110
Across magma layer, degree of supersaturation disappears, crystal growth.With 0.13m3The flow of/h draws magma from magma outlet 112, tank body
Extra clear feed liquid is flowed out from the overflow port 114 at top in 110.The clear feed liquid recycling is used for saturated solution of sodium bicarbonate or satiety
With the preparation of solution, magma further passes through stiff separation, dry obtained granular Sodium bicarbonate product, granular sodium bicarbonate production
The size distribution of product is as shown in table 1.
Sodium bicarbonate product size distribution prepared by 1 embodiment of table
As it can be seen from table 1 the device for improving sodium bicarbonate grain size number using the present invention prepares Sodium bicarbonate product, energy
The Sodium bicarbonate product that grain size is more than 150 mesh is enough obtained, and yield is high, 99% or more.
Further, comparative example 1,6,7 is it can be found that magma draws the flow of tank body 110 and bicarbonate obtained
Sodium size distribution also has certain relationship, and the flow that magma draws tank body 110 is smaller, is more likely to form the carbonic acid of greater particle size
Hydrogen sodium product；The flow that magma draws tank body 110 is bigger, is more likely to form the Sodium bicarbonate product of greater particle size.
Further, comparative example 1,8-11 are it can be found that material liquid import 111 and circulating cooling feed liquid axial-flow pump
The flow-rate ratio of outlet 113 has a certain impact for the grain size of Sodium bicarbonate product obtained, and circulating cooling feed liquid axial-flow pump goes out
Mouth 113 is bigger with the flow-rate ratio of material liquid import 111, and the Sodium bicarbonate product ratio for forming greater particle size is higher；Circulating cooling
The outlet 113 of feed liquid axial-flow pump is smaller with the flow-rate ratio of material liquid import 111, and the Sodium bicarbonate product ratio formed compared with small particle is got over
It is high；But on the whole, grain size can maintain 97% or more more than the product yield of 150 mesh.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. a kind of method improving sodium bicarbonate grain size number, which is characterized in that the side for improving sodium bicarbonate grain size number
Method is recrystallized sodium bicarbonate using the device for improving sodium bicarbonate grain size number, is included the following steps：
Prepare the saturated solution or supersaturated solution of sodium bicarbonate；
The saturated solution of the sodium bicarbonate or supersaturated solution are introduced into the raising bicarbonate by material liquid import (111)
The device of sodium grain size number；
The device for improving sodium bicarbonate grain size number includes tank body (110) and central backflow pipe (120)；
The tank body (110) is equipped with material liquid import (111), magma outlet (112), the outlet of circulating cooling feed liquid axial-flow pump
(113) and overflow port (114)；
The material liquid import (111) is used to introduce the saturated solution or supersaturated solution of sodium bicarbonate；
The magma outlet (112) is used to magma drawing the tank body (110)；
Circulating cooling feed liquid axial-flow pump outlet (113) setting is used in the middle and upper part of the tank body (110) by the tank body
(110) feed liquid in draws cooling；
Overflow port (114) setting is used at the top of the tank body (110) by excessive feed liquid in the tank body (110)
Discharge；
The central backflow pipe (120) is used to introduce feed liquid after cooling in the tank body (110), the central backflow pipe
(120) middle and lower part of cooling feed liquid return duct outlet (121) setting in the tank body (110).
2. the method according to claim 1 for improving sodium bicarbonate grain size number, which is characterized in that the magma outlet
(112) it is oppositely arranged on the tank body (110) with the material liquid import (111).
3. the method according to claim 2 for improving sodium bicarbonate grain size number, which is characterized in that the material liquid import
(111) it is arranged at the 1/4~1/2 of the tank body (110) height.
4. the method according to claim 1 for improving sodium bicarbonate grain size number, which is characterized in that the central backflow pipe
(120) in the inside of the tank body (110), the cooling feed liquid return duct outlet (121) of the central backflow pipe (120) is low for setting
In the material liquid import (111).
5. the method according to claim 4 for improving sodium bicarbonate grain size number, which is characterized in that the circulating cooling material
Liquid axial-flow pump exports (113) setting at the top of the tank body (110), and the cooling feed liquid of the central backflow pipe (120) flows back
Pipe exports (121) and is arranged in the bottom of tank body (110).
6. the method according to claim 5 for improving sodium bicarbonate grain size number, which is characterized in that the raising bicarbonate
The device of sodium grain size number further includes driver, and the driver is that the circulating cooling feed liquid extraction tank body (110) carries
For driving force.
7. the method according to claim 1 for improving sodium bicarbonate grain size number, which is characterized in that described into device
The feed liquid temperature difference entered after saturated solution or supersaturated solution and the cooling in the central backflow pipe (120) is 5~25 DEG C.
8. the method for the raising sodium bicarbonate grain size number according to claim 1 to 7 any one, which is characterized in that institute
The temperature for stating saturated solution or supersaturated solution is 50~70 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847485A (en) * | 2020-07-31 | 2020-10-30 | 辽宁佰健环保科技有限公司 | Method for preparing sodium bicarbonate particles |
| CN111943234A (en) * | 2020-08-13 | 2020-11-17 | 河北华晨药业有限公司 | Method for preparing medicinal sterile sodium bicarbonate granules with large particle size |
| CN111994923A (en) * | 2020-08-28 | 2020-11-27 | 新兴凌云医药化工有限公司 | Production medicine level large granule sodium bicarbonate crystal system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1849263A (en) * | 2004-08-24 | 2006-10-18 | 旭硝子株式会社 | Method for producing alkali metal hydrogencarbonate |
| CN204319821U (en) * | 2014-12-02 | 2015-05-13 | 成都华西堂投资有限公司 | A kind of sodium acid carbonate crystallizer containing central tube |
| CN108358220A (en) * | 2018-03-07 | 2018-08-03 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
| CN108439434A (en) * | 2018-03-07 | 2018-08-24 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
-
2018
- 2018-08-31 CN CN201811011839.XA patent/CN108751233B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1849263A (en) * | 2004-08-24 | 2006-10-18 | 旭硝子株式会社 | Method for producing alkali metal hydrogencarbonate |
| CN204319821U (en) * | 2014-12-02 | 2015-05-13 | 成都华西堂投资有限公司 | A kind of sodium acid carbonate crystallizer containing central tube |
| CN108358220A (en) * | 2018-03-07 | 2018-08-03 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
| CN108439434A (en) * | 2018-03-07 | 2018-08-24 | 武汉德泽环保科技有限公司 | A kind of method and apparatus producing sodium bicarbonate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111847485A (en) * | 2020-07-31 | 2020-10-30 | 辽宁佰健环保科技有限公司 | Method for preparing sodium bicarbonate particles |
| CN111847485B (en) * | 2020-07-31 | 2023-08-29 | 辽宁佰健环保科技有限公司 | Method for preparing sodium bicarbonate particles |
| CN111943234A (en) * | 2020-08-13 | 2020-11-17 | 河北华晨药业有限公司 | Method for preparing medicinal sterile sodium bicarbonate granules with large particle size |
| CN111994923A (en) * | 2020-08-28 | 2020-11-27 | 新兴凌云医药化工有限公司 | Production medicine level large granule sodium bicarbonate crystal system |
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