CN110282638A - The method and device of sodium bicarbonate is produced in a kind of double decomposition - Google Patents
The method and device of sodium bicarbonate is produced in a kind of double decomposition Download PDFInfo
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- CN110282638A CN110282638A CN201910692123.9A CN201910692123A CN110282638A CN 110282638 A CN110282638 A CN 110282638A CN 201910692123 A CN201910692123 A CN 201910692123A CN 110282638 A CN110282638 A CN 110282638A
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- Prior art keywords
- solid
- double decomposition
- sodium bicarbonate
- ammonium
- bicarbonate
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- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 155
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 81
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 77
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims abstract description 103
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 103
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 102
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims abstract description 100
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 239000007787 solid Substances 0.000 claims abstract description 76
- 239000002994 raw material Substances 0.000 claims abstract description 47
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 238000005649 metathesis reaction Methods 0.000 claims abstract description 15
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 60
- 239000000706 filtrate Substances 0.000 claims description 26
- 238000003860 storage Methods 0.000 claims description 25
- 239000012266 salt solution Substances 0.000 claims description 18
- 239000002562 thickening agent Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000011343 solid material Substances 0.000 claims description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims 1
- HDFXRQJQZBPDLF-UHFFFAOYSA-L disodium hydrogen carbonate Chemical compound [Na+].[Na+].OC([O-])=O.OC([O-])=O HDFXRQJQZBPDLF-UHFFFAOYSA-L 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 claims 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 abstract description 11
- 239000000047 product Substances 0.000 description 14
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 150000002431 hydrogen Chemical class 0.000 description 10
- 238000000926 separation method Methods 0.000 description 10
- 238000004090 dissolution Methods 0.000 description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 229910052596 spinel Inorganic materials 0.000 description 3
- 239000011029 spinel Substances 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C01D7/02—Preparation by double decomposition
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of method that sodium bicarbonate is produced in double decomposition.Double decomposition reactor takes out solution C of the liquid B after solid-liquid separator separates solid sodium bicarbonate and is divided into two parts C1 and C2, and solution C 1 enters ammonium bicarbonate solubility device, and solution C 2 enters ammonium salt production process；Double decomposition reactor takes out liquid B and enters sodium bicarbonate follow-up producing process through the solid sodium bicarbonate that solid-liquid separator is isolated；Ammonium bicarbonate solubility device is added in raw material solid ammonium hydrogen carbonate, and the solution A 1 of ammonium bicarbonate solubility device enters double decomposition reactor out；The saturation of raw material sodium salt enters double decomposition reactor close to the solution A 2 of saturation；Metathesis reaction occurs in double decomposition reactor and generates sodium bicarbonate for ammonium hydrogen carbonate and sodium salt.Using present invention process, utilization rate can reach 99.6% or more, reduce production cost, reduces solid ammonium bicarbonate as solid sodium bicarbonate enters the amount of product sodium bicarbonate, reduces the ammon amount of product sodium bicarbonate, solve the situation of sodium bicarbonate sales difficulty.
Description
Technical field
The invention belongs to the method and devices that chemical production technical field more particularly to a kind of double decomposition produce sodium bicarbonate.
Background technique
The method that conventional metathesis produces sodium bicarbonate is directly added into the sodium of saturation or close saturation using solid ammonium bicarbonate
The mode of metathesis reaction is carried out in salting liquid, solid ammonium bicarbonate submerges or be suspended in saturation or the sodium salt solution close to saturation
In dissolution while carry out metathesis reaction.
Solid ammonium bicarbonate enters saturation or undergoes two processes: course of dissolution and subdivision close in the sodium salt solution of saturation
Solve reaction process；Due to the sodium ion in the ammonium hydrogen carbonate and sodium salt solution that have been dissolved in course of dissolution react generate it is solid
Body sodium bicarbonate causes fraction solids sodium bicarbonate to be attached to undissolved solid ammonium bicarbonate surface, on the one hand causes carbonic acid
Hydrogen ammonium solution rate reduces, and on the other hand causes peritectoid (solid sodium bicarbonate package solid ammonium bicarbonate)；Lead to solid carbonic acid
Hydrogen ammonium enters product sodium bicarbonate with solid sodium bicarbonate, and sodium bicarbonate ammon amount increases, and the application of sodium bicarbonate is limited, sold
Difficulty, while the utilization rate of oxide spinel hydrogen ammonium reduces, production cost sharply increases.
Summary of the invention
The purpose of the present invention is to provide a kind of methods that sodium bicarbonate is produced in double decomposition, small to overcome conventional metathesis to produce
Ammonium hydrogen carbonate utilization rate is relatively low in the method for soda, production cost is higher, sodium bicarbonate product ammon amount height, product sales difficulty etc.
Drawback.
Technical solution provided by the invention: a kind of method that sodium bicarbonate is produced in double decomposition includes the following steps: raw material solid
Ammonium bicarbonate solubility device is added in ammonium hydrogen carbonate, and the solution A 1 of ammonium bicarbonate solubility device enters double decomposition reactor out；Raw material sodium salt
Saturation or close to saturation solution A 2 enter double decomposition reactor；Ammonium hydrogen carbonate and sodium salt occur multiple in double decomposition reactor
Decomposition reaction generates sodium bicarbonate, and double decomposition reactor takes out solution C of the liquid B after solid-liquid separator separates solid sodium bicarbonate
It is divided into two parts C1 and C2, solution C 1 enters ammonium bicarbonate solubility device, and solution C 2 enters ammonium salt production process；Double decomposition reactor
It takes out liquid B and enters sodium bicarbonate follow-up producing process through the solid sodium bicarbonate that solid-liquid separator is isolated.
Further, the volume ratio of A1 and A2 is 0.2~20:1.
Further, the reaction temperature of the double decomposition reactor is 5~100 DEG C.
Further, the volume ratio of the A1 and A2 is 2~4:1, and the reaction temperature of double decomposition reactor is 20~40 DEG C.
Further, the raw material sodium salt in the solution A 2 of the saturation of raw material sodium salt or close saturation is sodium chloride, sodium sulphate
Or a certain kind of other sodium salts.
The device of sodium bicarbonate, including double decomposition reactor, ammonium bicarbonate solubility device, solid-liquid separator are produced in a kind of double decomposition
With filtrate storage tank, the double decomposition reactor top is equipped with ammonium bicarbonate soln feed inlet and raw material sodium salt solution feed inlet, under
Portion is equipped with discharge port, and the discharge port is connected by pipeline with the feed inlet of solid-liquid separator；The solid-liquid separator is also set
There are solid sodium bicarbonate discharge port and liquid outlet opening, the solid sodium bicarbonate discharge port is connected with solid material conveying machinery
Logical that solid sodium bicarbonate is sent to sodium bicarbonate follow-up producing process, the liquid outlet opening passes through the charging of pipeline and filtrate storage tank
Mouth is connected；The filtrate storage tank is additionally provided with the first discharge port and the second discharge port, and first discharge port passes through pipeline and carbon
The liquid inlet opening of sour hydrogen ammonium dissolvers is connected, and liquid is sent to ammonium salt production process by pipeline by second discharge port；
The ammonium bicarbonate solubility device is equipped with liquid inlet opening, raw material solid ammonium hydrogen carbonate feed inlet and ammonium bicarbonate soln discharge port,
The ammonium bicarbonate soln discharge port is connected by pipeline with the feed inlet of the ammonium bicarbonate soln of double decomposition reactor.
The raw material sodium salt solution feed inlet is connected by pipeline with the production process of raw material sodium salt solution,
The raw material solid ammonium hydrogen carbonate feed inlet is connected with solid material conveying machinery receives raw material solid bicarbonate
Ammonium.
Double decomposition reactor is tower, bucket, slot, stirring or combinations thereof.
The solid-liquid separator is settling tank, crystallizer, thickener, belt vacuum filter, rotary drum vacuum filter, disk
Formula filter, plate and frame filter press, centrifuge or combinations thereof.
Amount those skilled in the art of solution C 1 in the present invention for dissolving ammonium hydrogen carbonate can be according to the molten of ammonium hydrogen carbonate
Solution degree is adjusted.
Sodium ion source is different in the present invention, different solubility, causes mother liquor equivalent different.
The present invention passes through the volume for increasing the reaction solution of unit product (production equivalent sodium bicarbonate), feed change solid carbon
Two kinds of measures of adding manner of sour hydrogen ammonium, increase " unit volume " of target product sodium bicarbonate, reduce product bicarbonate
" concentration " of sodium, this measure " can dilute " the sodium bicarbonate degree of supersaturation generated by metathesis reaction, reduce because of supersaturation
Degree accumulates and largely generates new tiny sodium bicarbonate crystallization (a nucleus outburst), ensure that sodium bicarbonate grain size number,
Sodium bicarbonate crystallization particle diameter is big, material takes out and is easy, optimize the crystallization of product sodium bicarbonate growth environment (low degree of supersaturation,
Low magma concentration), change the process of metathesis reaction, dissolution involved in background technique and will react while carry out being changed to elder generation
Two physical and chemical processes of metathesis reaction, improve the producing level of oxide spinel hydrogen ammonium after dissolution.By ammonium hydrogen carbonate part
It mixes, react, bicarbonate with saturation in double decomposition reactor or close to the sodium salt solution A2 of saturation after dissolution or whole dissolutions
When ammonium is partly dissolved compared with solid ammonium bicarbonate is added directly into sodium salt solution, reduce the solid being added in sodium salt solution
The amount of ammonium hydrogen carbonate improves the solution rate of ammonium hydrogen carbonate in double decomposition reactor, reduces peritectoid (solid sodium bicarbonate packet
Wrap up in solid ammonium bicarbonate) yield.When ammonium hydrogen carbonate all dissolves compared with being added directly into sodium salt solution, sodium salt solution
In without solid ammonium bicarbonate, ammonium hydrogen carbonate only has metathesis reaction mistake without course of dissolution in double decomposition reactor
Journey has prevented the generation of peritectoid (newborn solid sodium bicarbonate package solid ammonium bicarbonate).Present invention sodium bicarbonate product per ton
Ammonium hydrogen carbonate consume and by 1.3 tons of conventional method be down to 1.05 tons, cost is greatly reduced, the carbon of sodium bicarbonate product clip band per ton
Sour hydrogen ammonium is down to 50ppm hereinafter, the surface mean diameter D [3,2] of sodium bicarbonate product is by conventional method by the 1500ppm of conventional method
32 μm increase to 62 μm.The utilization rate of oxide spinel hydrogen ammonium of the present invention is high, production cost is low, sodium bicarbonate grain size number is big,
Particle size distribution is narrow, and excellence rate is high, reduces or prevents solid ammonium bicarbonate as solid sodium bicarbonate enters product little Su
The amount beaten reduces the ammon amount of product sodium bicarbonate, solves the situation of sodium bicarbonate sales difficulty.
Using present invention process, ammonium hydrogen carbonate carries out metathesis reaction in the case where partly or entirely being dissolved；It mentions
The utilization rate of high raw material ammonium hydrogen carbonate, utilization rate can reach 99.6% or more, reduce production cost, reduce or prevent solid carbonic acid
Hydrogen ammonium enters the amount of product sodium bicarbonate with solid sodium bicarbonate, reduces the ammon amount of product sodium bicarbonate, solves sodium bicarbonate sale
Difficult situation.
Detailed description of the invention
Fig. 1 is the process flow diagram of the embodiment of the present invention 1；
Fig. 2 is the process flow diagram of the embodiment of the present invention 2；
Fig. 3 is the process flow diagram of the embodiment of the present invention 3；
Fig. 4 is the process flow diagram of the embodiment of the present invention 4；
In figure: 1-double decomposition reactor, 1-1-ammonium bicarbonate soln feed inlet, 1-2-raw material sodium salt solution feed inlet,
1-3-discharge port, 2-thickeners, 3-centrifuges, 4-filtrate storage tanks, the first discharge port of 4-1-, the second discharge port of 4-2-,
5-ammonium bicarbonate solubility devices, 5-1-liquid inlet opening, 5-2-raw material solid ammonium hydrogen carbonate feed inlet, 5-3-ammonium hydrogen carbonate are molten
Liquid discharge port, 6-belt vacuum filters.
Specific embodiment
The present invention is described further in the following with reference to the drawings and specific embodiments.
The device of sodium bicarbonate, including double decomposition reactor 1, ammonium bicarbonate solubility device 5, separation of solid and liquid are produced in a kind of double decomposition
Device and filtrate storage tank 4,1 top of double decomposition reactor be equipped with ammonium bicarbonate soln feed inlet 1-1 and raw material sodium salt solution into
Material mouth 1-2, lower part are equipped with discharge port 1-3, and the discharge port 1-3 is connected by pipeline with the feed inlet of solid-liquid separator；Institute
It states solid-liquid separator and is additionally provided with solid sodium bicarbonate discharge port and liquid outlet opening, the solid sodium bicarbonate discharge port and solid
Material handling machinery, which is connected, is sent to sodium bicarbonate follow-up producing process for solid sodium bicarbonate, and the liquid outlet opening passes through pipeline
It is connected with the feed inlet of filtrate storage tank 4；It is logical that the filtrate storage tank 4 is equipped with the second discharge port 4-2, the second discharge port 4-2
Liquid is sent to ammonium salt production process by piping；The ammonium bicarbonate solubility device 5 is equipped with liquid inlet opening 5-1, raw material solid carbon
Sour hydrogen ammonium feed inlet 5-2 and ammonium bicarbonate soln discharge port 5-3, the ammonium bicarbonate soln discharge port 5-3 are by pipeline and again
The feed inlet 1-1 of the ammonium bicarbonate soln of decomposition reactor 1 is connected.
The raw material sodium salt solution feed inlet 1-2 is connected by pipeline with the production process of raw material sodium salt solution.
The filtrate storage tank 4 is additionally provided with the first discharge port 4-1, the first discharge port 4-1 and passes through pipeline and ammonium hydrogen carbonate
The liquid inlet opening 5-1 of dissolvers 5 is connected, the raw material solid ammonium hydrogen carbonate feed inlet 5-2 and solid material conveying machinery
It is connected and receives raw material solid ammonium hydrogen carbonate.
Embodiment 1
The method that sodium bicarbonate is produced in a kind of double decomposition as shown in Figure 1, double decomposition reactor 1 take out liquid and enter separation of solid and liquid
The centrifuge 3 of device, the solid sodium bicarbonate that the centrifuge 3 of solid-liquid separator is isolated enter sodium bicarbonate follow-up producing process；Gu
The solution C that the centrifuge 3 of liquid/gas separator is isolated enters filtrate storage tank 4, and it is molten to enter ammonium hydrogen carbonate for the solution C 1 of filtrate storage tank 4 out
Device 5 is solved, the solution C 2 of filtrate storage tank 4 enters ammonium salt production process out；Ammonium bicarbonate solubility device is added in raw material solid ammonium hydrogen carbonate
5, the solution A 1 of ammonium bicarbonate solubility device 5 enters double decomposition reactor 1 out；The solution A 2 of the saturation of raw material sodium salt or close saturation
Into double decomposition reactor 1；Metathesis reaction occurs in double decomposition reactor 1 and generates sodium bicarbonate for ammonium hydrogen carbonate and sodium salt.
Double decomposition reactor takes out 20 DEG C of liquid temperature；200 cubic metres of the volume of solution A 1；50 cubes of the volume of solution A 2
Rice；The volume ratio of A1:A2 is 4:1；Solid ammonium bicarbonate, i.e. raw material solid are free of in the solution A 1 of ammonium bicarbonate solubility device 5 out
Ammonium hydrogen carbonate all dissolves in ammonium bicarbonate solubility device 5.
Enter the volume of double decomposition reactor solution (A1+A2): the saturation of raw material sodium salt or close saturation in the present embodiment
Solution (A2) volume be 5:1.
Solid-liquid separator described in the present embodiment is centrifuge, and level-one separate mode, which is realized, to be separated by solid-liquid separation.
Embodiment 2
The method that sodium bicarbonate is produced in a kind of double decomposition as shown in Figure 2, double decomposition reactor 1 take out liquid and enter separation of solid and liquid
The thickener 2 of device, the clear solution C1 of the 2 top overflow of thickener of solid-liquid separator enter ammonium bicarbonate solubility device 5, solid-liquid point
The magma of 2 bottom of thickener from device enters the centrifuge 3 of solid-liquid separator, and what the centrifuge 3 of solid-liquid separator was isolated consolidates
Body sodium bicarbonate enters sodium bicarbonate follow-up producing process；The solution C 2 that the centrifuge 3 of solid-liquid separator is isolated enters filtrate and stores up
Bucket 4, the solution C 2 of filtrate storage tank 4 enters ammonium salt production process out；Ammonium bicarbonate solubility device 5 is added in raw material solid ammonium hydrogen carbonate,
The solution A 1 of ammonium bicarbonate solubility device 5 enters double decomposition reactor 1 out；The saturation of raw material sodium salt or close to saturation solution A 2 into
Enter double decomposition reactor 1；Metathesis reaction occurs in double decomposition reactor 1 and generates sodium bicarbonate for ammonium hydrogen carbonate and sodium salt.
Double decomposition reactor takes out 30 DEG C of liquid temperature；120 cubic metres of the volume of solution A 1；40 cubes of the volume of solution A 2
Rice；The volume ratio of A1:A2 is 3:1；Contain a small amount of solid ammonium bicarbonate, i.e. raw material in the solution A 1 of ammonium bicarbonate solubility device 5 out
Solid ammonium bicarbonate largely dissolves in ammonium bicarbonate solubility device.
Enter the volume of double decomposition reactor solution (A1+A2): the saturation of raw material sodium salt or close saturation in the present embodiment
Solution (A2) volume be 4:1.
Solid-liquid separator described in the present embodiment is the combination of thickener, centrifuge, and the second-order separation mode realizes solid-liquid point
From.
Embodiment 3
The method that sodium bicarbonate is produced in a kind of double decomposition as shown in Figure 3, double decomposition reactor 1 take out liquid and enter separation of solid and liquid
The thickener 2 of device, the clear solution of the 2 top overflow of thickener of solid-liquid separator enter filtrate storage tank 4, solid-liquid separator it is thick
The magma of thick 2 bottom of device enters the centrifuge 3 of solid-liquid separator, the solid carbonic acid hydrogen that the centrifuge 3 of solid-liquid separator is isolated
Sodium enters sodium bicarbonate follow-up producing process；The solution that the centrifuge 3 of solid-liquid separator is isolated enters filtrate storage tank 4, out filtrate
The solution C 1 of storage tank 4 enters ammonium bicarbonate solubility device 5, and the solution C 2 of filtrate storage tank 4 enters ammonium salt production process out；Raw material solid
Ammonium bicarbonate solubility device 5 is added in ammonium hydrogen carbonate, and the solution A 1 of ammonium bicarbonate solubility device 5 enters double decomposition reactor 1 out；Raw material sodium
The saturation of salt enters double decomposition reactor 1 close to the solution A 2 of saturation；Ammonium hydrogen carbonate and sodium salt are sent out in double decomposition reactor 1
Raw metathesis reaction generates sodium bicarbonate.
Double decomposition reactor takes out 40 DEG C of liquid temperature；60 cubic metres of the volume of solution A 1；30 cubic metres of the volume of solution A 2；
The volume ratio of A1:A2 is 2:1；Contain a small amount of solid ammonium bicarbonate, i.e. raw material solid in the solution A 1 of ammonium bicarbonate solubility device 5 out
Ammonium hydrogen carbonate largely dissolves in ammonium bicarbonate solubility device 5.
Enter the volume of double decomposition reactor solution (A1+A2): the saturation of raw material sodium salt or close saturation in the present embodiment
Solution (A2) volume be 3:1.
Solid-liquid separator described in the present embodiment is the combination of thickener, centrifuge, and the second-order separation mode realizes solid-liquid point
From.
Embodiment 4
The method that sodium bicarbonate is produced in a kind of double decomposition as shown in Figure 4, double decomposition reactor 1 take out liquid and enter separation of solid and liquid
The thickener 2 of device, the clear solution of the 2 top overflow of thickener of solid-liquid separator enter filtrate storage tank 4, solid-liquid separator it is thick
The magma of thick 2 bottom of device enters the belt vacuum filter 6 of solid-liquid separator；The belt vacuum filter 6 of solid-liquid separator divides
The solution separated out enters filtrate storage tank 4, and the solid sodium bicarbonate that the belt vacuum filter 6 of solid-liquid separator is isolated enters solid
The centrifuge 3 of liquid/gas separator；The solid sodium bicarbonate that the centrifuge 3 of solid-liquid separator is isolated enters sodium bicarbonate subsequent production work
Sequence, the solution that the centrifuge 3 of solid-liquid separator is isolated enter filtrate storage tank 4；The solution C 1 of filtrate storage tank 4 enters bicarbonate out
Ammonium dissolvers 5, the solution C 2 of filtrate storage tank 4 enters ammonium salt production process out；It is molten that ammonium hydrogen carbonate is added in raw material solid ammonium hydrogen carbonate
Device 5 is solved, the solution A 1 of ammonium bicarbonate solubility device 5 enters double decomposition reactor 1 out；The saturation of raw material sodium salt is molten close to what is be saturated
Liquid A2 enters double decomposition reactor 1；Metathesis reaction occurs in double decomposition reactor 1 and generates bicarbonate for ammonium hydrogen carbonate and sodium salt
Sodium.
Double decomposition reactor takes out 40 DEG C of liquid temperature；40 cubic metres of the volume of solution A 1；40 cubic metres of the volume of solution A 2；
The volume ratio of A1:A2 is 1:1；Contain a small amount of solid ammonium bicarbonate, i.e. raw material solid in the solution A 1 of ammonium bicarbonate solubility device 5 out
Ammonium hydrogen carbonate largely dissolves in ammonium bicarbonate solubility device 5.
Enter the volume of double decomposition reactor solution (A1+A2): the saturation of raw material sodium salt or close saturation in the present embodiment
Solution (A2) volume be 2:1.
Solid-liquid separator described in the present embodiment is the combination of thickener, belt vacuum filter, centrifuge, three-level separation
Mode realizes separation of solid and liquid.
Above-described embodiment is the preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other any without departing from the substitute mode that should be equivalent is changed made by the present invention, it is included in guarantor of the invention
Within the scope of shield.
Claims (10)
1. a kind of method that sodium bicarbonate is produced in double decomposition, it is characterised in that include the following steps: that raw material solid ammonium hydrogen carbonate is added
Ammonium bicarbonate solubility device, the solution A 1 of ammonium bicarbonate solubility device enters double decomposition reactor out；The saturation of raw material sodium salt is close
The solution A 2 of saturation enters double decomposition reactor；Metathesis reaction generation occurs in double decomposition reactor for ammonium hydrogen carbonate and sodium salt
Sodium bicarbonate, double decomposition reactor take out solution C of the liquid B after solid-liquid separator separates solid sodium bicarbonate and are divided into two parts C1
And C2, solution C 1 enter ammonium bicarbonate solubility device, solution C 2 enters ammonium salt production process；Double decomposition reactor takes out liquid B through solid
The solid sodium bicarbonate that liquid/gas separator is isolated enters sodium bicarbonate follow-up producing process.
2. the method that sodium bicarbonate is produced in double decomposition according to claim 1, it is characterised in that: the volume ratio of A1 and A2 is
0.2~20:1.
3. the method that sodium bicarbonate is produced in double decomposition according to claim 1, it is characterised in that: the double decomposition reactor
Reaction temperature is 5~100 DEG C.
4. the method that sodium bicarbonate is produced in double decomposition according to claim 1, it is characterised in that: the volume ratio of the A1 and A2
For 2~4:1, the reaction temperature of double decomposition reactor is 20~40 DEG C.
5. the method that sodium bicarbonate is produced in double decomposition according to claim 1, it is characterised in that: the saturation of raw material sodium salt connects
The raw material sodium salt in solution A 2 being closely saturated is a certain kind of sodium chloride, sodium sulphate or other sodium salts.
6. the device that sodium bicarbonate is produced in a kind of double decomposition, it is characterised in that including double decomposition reactor (1), ammonium bicarbonate solubility device
(5), solid-liquid separator and filtrate storage tank (4), double decomposition reactor (1) top are equipped with ammonium bicarbonate soln feed inlet (1-
1) and raw material sodium salt solution feed inlet (1-2), lower part are equipped with discharge port (1-3), and the discharge port (1-3) passes through pipeline and solid-liquid
The feed inlet of separator is connected；The solid-liquid separator is additionally provided with solid sodium bicarbonate discharge port and liquid outlet opening, described
Solid sodium bicarbonate discharge port is connected with solid material conveying machinery is sent to sodium bicarbonate subsequent production work for solid sodium bicarbonate
Sequence, the liquid outlet opening are connected by pipeline with the feed inlet of filtrate storage tank (4)；The filtrate storage tank (4) is equipped with second
Liquid is sent to ammonium salt production process by pipeline by discharge port (4-2), second discharge port (4-2)；The ammonium hydrogen carbonate is molten
It solves device (5) and is equipped with liquid inlet opening (5-1), raw material solid ammonium hydrogen carbonate feed inlet (5-2) and ammonium bicarbonate soln discharge port (5-
3), the ammonium bicarbonate soln discharge port (5-3) passes through the ammonium bicarbonate soln feed inlet of pipeline and double decomposition reactor (1)
(1-1) is connected.
7. the device that sodium bicarbonate is produced in double decomposition according to claim 6, it is characterised in that: the raw material sodium salt solution into
Material mouth (1-2) is connected by pipeline with the production process of raw material sodium salt solution.
8. the device that sodium bicarbonate is produced in double decomposition according to claim 6, it is characterised in that: the filtrate storage tank (4) is also
Equipped with the first discharge port (4-1), first discharge port (4-1) passes through the liquid feedstock of pipeline and ammonium bicarbonate solubility device (5)
Mouth (5-1) is connected, and the raw material solid ammonium hydrogen carbonate feed inlet (5-2) is connected with solid material conveying machinery receives raw material
Solid ammonium bicarbonate.
9. the device that sodium bicarbonate is produced in double decomposition according to claim 6, it is characterised in that: double decomposition reactor (1) is
Tower, bucket, slot, stirring or combinations thereof.
10. the device that sodium bicarbonate is produced in double decomposition according to claim 6, it is characterised in that: the solid-liquid separator is
Settling tank, crystallizer, thickener, belt vacuum filter, rotary drum vacuum filter, disk filter, plate and frame filter press, centrifugation
Machine or combinations thereof.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111661869A (en) * | 2020-06-29 | 2020-09-15 | 董杰 | Method for recycling waste sodium salt in carbonate preparation process |
| CN114751430A (en) * | 2022-04-07 | 2022-07-15 | 湖南化工设计院有限公司 | Method for preparing baking soda and coproducing ammonium chloride by low-temperature bidirectional salting-out circulation method |
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| CN1460642A (en) * | 2003-06-07 | 2003-12-10 | 程培胜 | New method for coproducing sodium carbonate, potassium sulfate and ammonium chloride |
| JP2005041743A (en) * | 2003-07-23 | 2005-02-17 | Asahi Glass Co Ltd | Method for manufacturing alkali metal hydrogen carbonate |
| CN1775679A (en) * | 2005-12-09 | 2006-05-24 | 程培胜 | New method for coproducing sodium carbonate, potassium sulfate and ammonium chloride |
| 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 |
| CN210764361U (en) * | 2019-07-30 | 2020-06-16 | 武汉德泽环保科技有限公司 | Device for preparing baking soda by double decomposition |
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| CN1460642A (en) * | 2003-06-07 | 2003-12-10 | 程培胜 | New method for coproducing sodium carbonate, potassium sulfate and ammonium chloride |
| JP2005041743A (en) * | 2003-07-23 | 2005-02-17 | Asahi Glass Co Ltd | Method for manufacturing alkali metal hydrogen carbonate |
| CN1775679A (en) * | 2005-12-09 | 2006-05-24 | 程培胜 | New method for coproducing sodium carbonate, potassium sulfate and ammonium chloride |
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| CN111661869A (en) * | 2020-06-29 | 2020-09-15 | 董杰 | Method for recycling waste sodium salt in carbonate preparation process |
| CN114751430A (en) * | 2022-04-07 | 2022-07-15 | 湖南化工设计院有限公司 | Method for preparing baking soda and coproducing ammonium chloride by low-temperature bidirectional salting-out circulation method |
| CN114751430B (en) * | 2022-04-07 | 2023-12-01 | 湖南化工设计院有限公司 | Method for producing sodium bicarbonate and co-producing ammonium chloride by low-temperature bidirectional salting-out circulation method |
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| CN110282638B (en) | 2024-05-17 |
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