CN87104642A - Producing soda by solid-phase process - Google Patents
Producing soda by solid-phase process Download PDFInfo
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- CN87104642A CN87104642A CN 87104642 CN87104642A CN87104642A CN 87104642 A CN87104642 A CN 87104642A CN 87104642 CN87104642 CN 87104642 CN 87104642 A CN87104642 A CN 87104642A CN 87104642 A CN87104642 A CN 87104642A
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- bicarbonate
- ammonia
- washing
- sodium
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Abstract
The invention provides a kind of method of in the solid phase scope, producing soda ash.Adopted novel process measures such as broken salt, bicarbonate of ammonia choosing grain, solid shape processing, permeable reactive, float glass process washing, filtration washing during its characteristics are to produce, the process that makes the reaction of bicarbonate of ammonia and sodium-chlor generate sodium bicarbonate is mainly carried out in the solid phase scope.Therefore do not need bulky equipment and complex technology just can produce high-quality coarse grain Soda Ash Danse, and energy consumption is low.The present invention is used for producing, less investment, and instant effect, the economic benefit height, easy to utilize.
Description
The present invention relates to a kind of system alkaline process, particularly use the method that producing method is produced soda ash.
Usually the system alkaline process that is adopted is Sol dimension system alkaline process, i.e. an ammonium alkaline process.The main chemical reactions equation NaCl+NH of its technical process
3+ Co
2+ HO
2→ NaHCO
3+ NH
4CI represents.As everyone knows, Sol dimension method Technology is very complicated, a whole set of tight movement system is made up of a large amount of equipment, invest huge, energy consumption is big in the actual production, utilization ratio is low, and technology has very high requirement to operator's the technical quality and the level of management of enterprise, and general little factory is difficult to apply.
Owing to the breakthrough of Ammonia Production on Technology, make the aboundresources of bicarbonate of ammonia in recent years.A kind of NH that directly passes through
4HCO
3+ NaCI ()/() NaHCO
3+ NH
4The technology that soda ash is produced in the CI reaction has been used for production practice, and this simple and easy soda ash working system is got ammoniated brine and carbonic acid gas operation because of having saved Sol dimension legal system, has saved a complete set of gas recovery, purification system, thereby reduced investment, last detective.But in the operation that saves, comprise the cleaning section of Sol dimension method for the strictness that improves the soda ash quality and adopt, simple and easy soda ash working system of while follows Sol dimension method and produces in liquid range, the sodium bicarbonate of being produced is the lightweight powdery, thereby no effective means is discharged calcium, magnesium addition particulate and muriate in technology.The soda ash Na that is produced by simple and easy soda ash working system
2CO
3Content is low, of poor quality.
Task of the present invention is to provide a kind of and had not only needed bulky equipment and complex technology, but also can produce the producing method of superior in quality coarse grain Soda Ash Danse.
The invention is characterized in and adopted broken salt in the production, novel process measures such as bicarbonate of ammonia choosing grain, solid shape processing, permeable reactive, float glass process washing, filtration washing, the process that makes bicarbonate of ammonia change into sodium bicarbonate in reaction is mainly carried out (being to have kept the original particle shape of bicarbonate of ammonia after sodium bicarbonate generates) in the solid phase scope.Thereby produce good coarse grain Soda Ash Danse.
Describe the present invention below in conjunction with accompanying drawing.
Fig. 1 is the producing soda by solid-phase process process flow diagram.
Broken salt described in the figure refers to coarse grain rock salt or sea salt are processed into powdery (need not process powdering salt), and its granule size does not have strict demand.
Described carbonic hydroammonium choosing grain, that to select particle size diameter with sieve method or pneumatic concentration be raw material (more even to granularity, the following granule content of diameter 0.2mm is not higher than 20% carbonic hydroammonium granular feedstock can the directly use without the choosing grain) at the carbonic hydroammonium particle of 0.2-1.5mm.
Described solid is processed; it is moistening with the salt powder to refer to add a small amount of recirculated water; and together send in the container with agitating device with granular carbonic hydroammonium and evenly to mix; carbonic hydroammonium and sodium chloride produce reaction in mixed process; generate the firm sodium acid carbonate duricrust of one deck at the carbonic hydroammonium particle surface; this layer duricrust progressive additive has played tight protective effect to carbonic hydroammonium, makes it no longer be dissolved in water in the permeable reactive process and resolves into ammonia and carbon dioxide. Thereby improved the utilization ratio of carbonic hydroammonium, guaranteed that the reaction generative process of carbonic hydroammonium is carried out in the solid-state lattice of carbonic hydroammonium, its crystalline solid has kept the solid shape of carbonic hydroammonium.
Described permeable reactive is meant the compound after solid shape is handled sent in the reaction tank that fills recirculated water with pay-off and soaks, and imposes intermittently and stir.Because reaction generates in solid shape treating processes ammonium chloride and part salt pruinescence dissolve rapidly, the reaction tank temperature also reduces rapidly, and the sodium chloride solution that forms high density is slowly to infiltration of bicarbonate of ammonia heart portion and the reaction handled through solid shape.The sodium-chlor that solution consumed in reaction continues dissolving by powdery salt and replenishes, and makes solution keep higher sodium chloride content.When bicarbonate of ammonia particle 95% was converted into bicarbonate of ammonia, permeable reactive was considered to basic end, and this moment, bicarbonate of ammonia particle feel was hard, as coarse sand grain.
Described float glass process washing is meant and utilizes the sodium bicarbonate that generates to have the crystal density height that the heavy physical features of the thick matter of grain adopts simple gravity separation principle to float and washes, and separates the various contaminant particles of being brought into by the salt powder behind solid processing and permeable reactive.Method is the sodium bicarbonate in the reaction tank together to be entered together with mother liquor in the soda container of whipping appts stir, utilize the soda container to import and export waterhead again bicarbonate of ammonia is entered settling tank simultaneously together with the mother liquor that is suspended with a large amount of contaminant particles, the heavy particle sodium bicarbonate of the thick matter of grain precipitates heap rapidly in settling tank, and contaminant particles overflows into the mother liquor settling pool in company with mother liquor.Sodium bicarbonate quality after float glass process washing significantly improves, and has effectively solved other system alkaline process insoluble equipment in conveying, dehydration, calcination process problem that scabs.
Described filtration washing still has the small amount of sodium chloride powder residual after being meant float glass process, needs to dissolve, dilute, filter out, with further raising soda ash quality.Method is to set up filtering layer in the settling pool bottom, and at filtering layer outlet at bottom device control valve.Float when washing and to close valve, make mother liquor overflow into the mother liquor settling pool, floatingly drive valve after washing end, use the recirculated water filtration washing, together enter recirculated water with recirculated water after the residual sodium chloride salt pruinescence lyolysis and hold the pond or be directly used in permeable reactive by pool surface.
Sodium bicarbonate behind the filtration washing can use the method and apparatus that those of ordinary skill is known altogether in the alkali-making process to dewater, and calcination can directly obtain good coarse grain Soda Ash Danse.Removed the technological process that Sol dimension method will heavily be handled powdery Soda Ash Light 99.2min. system from.
The invention has the advantages that whole process of production mainly carries out in the solid phase scope, need huge and tight temperature control, pressure control reaction unit and gas reclaiming purifying device and system refitting to put.Required equipment and Technology are very simple, and the soda ash quality of producing is good, and energy consumption and raw material unit's consumption are starkly lower than other system alkaline process.The present invention is used for soda ash production, less investment, economic benefit height, and instant effect, easy to utilize.
Embodiment
Use Fujian salt to be raw material, pulverize with common pulverizer, globule size does not have strict demand.
Use Lingchuan, Guangxi nitrogen fertilizer plant bicarbonate of ammonia to be raw material, nitrogen content 17.1%, epigranular, particle diameter is more than the 0.2mm, can directly use.
Get 0.9 ton in salt powder and pack into after moistening with small amount of recycled water and stir in the mixer, and drop into 1 ton of mixing of bicarbonate of ammonia and mix.Visible bicarbonate of ammonia gradually becomes white in mixing process, promptly generates the sodium bicarbonate duricrust on the surface.
The bicarbonate of ammonia that generates duricrust is poured in the conveying funnel, delivered to above the reaction tank that fills recirculated water, the unlatching funnel is poured compound into, imposes intermittently and stirs, and about whenever leaving standstill started stirring 15-30 minute after 4-6 hour.To promote pond inner salt powder dissolving, the sodium-chlor that postreaction consumed.Soaking like this can make 95% bicarbonate of ammonia particle be converted into sodium bicarbonate in 72 hours.Pull sodium bicarbonate this moment out, selects bigger one of granularity wherein to cut off with sharp weapon, just can see except that there is minimum bicarbonate of ammonia nuclear in the centre (being about below 5%), all the other partly all are converted into white bicarbonate of ammonia, and vertebration, feel is hard, rubs the no powder phenomenon-tion of mill with the hands at the palm of the hand.
After permeable reactive finishes, the reaction tank valve is reached the appropriate location, make sodium bicarbonate together enter the molten device of soda with mother liquor, soda device whipping appts continuous operation, sticking paying peeled off in the contaminant particles on sodium bicarbonate surface, make it to be suspended in the bigger mother liquor of proportion, and utilize the import and export waterhead to enter settling tank (this moment, the filtering layer valve was in closing condition).A large amount of impurity overflow into the mother liquor settling pool with mother liquor by the outlet of pond face.To flowing into the sodium bicarbonate of soda device in the reaction tank voluntarily, the mother liquor water that utilizes water pump to extract after sinking clearly pours the soda device with it.Effectively solved the problem that in dehydration procedure, scabs in caking and the incinerator later on.
Floating the by-pass valve control of filtering layer bottom is opened after washing end, is drained mother liquor, extract recirculated water and pour into settling tank, make recirculated water infiltration sodium bicarbonate, and sodium chloride salt powder that will be residual dissolving inflow recirculated water to hold the pond standby.
Sodium bicarbonate dewaters through high speed centrifugation after the diafiltration, makes its surface water content be lower than 3%, sends into that calcination becomes soda ash in the calcination converter again, through cooling, weigh 704 kilograms of soda ash, Na
2CO
3Content 98.8%.
Claims (7)
1, a kind of direct be the method for raw material production soda ash with bicarbonate of ammonia and sodium-chlor, it is characterized in that the reaction of bicarbonate of ammonia and sodium-chlor generates sodium bicarbonate and ammonium chloride process worker will carry out in the solid phase scope.
2, system alkaline process according to claim 1, it is characterized in that described reaction generate sodium bicarbonate and ammonium chloride process mainly in the solid phase scope, be meant with the moistening back of chippy salt powder with mix through the bicarbonate of ammonia uniform particles of choosing grain processing, carrying out solid shape handles, again through permeable reactive, novel process measures such as float glass process washing, filtration washing, after dehydration, calcination forms.
3, system alkaline process according to claim 2 is characterized in that bicarbonate of ammonia particulate particle size diameter is 0.2-1.5mm.
4, system alkaline process according to claim 2 is characterized in that it is that the moistening back of powdery salt is mixed with the bicarbonate of ammonia uniform particles that solid shape is handled, and makes the bicarbonate of ammonia particle surface generate the firm sodium bicarbonate duricrust of one deck.
5, system alkaline process according to claim 2, it is characterized in that permeable reactive is the compound after solid shape is handled to be sent in the reaction tank that fills recirculated water soak, and impose intermittently stirring, when the bicarbonate of ammonia particle when 95% was converted into sodium bicarbonate, permeable reactive finished substantially.
6, system alkaline process according to claim 2, it is characterized in that float glass process washing is the sodium bicarbonate in the reaction tank together to be entered together with mother liquor in the soda container of whipping appts stir, and utilize soda device import and export waterhead to enter settling tank, floating decon particulate.
7, system alkaline process according to claim 2 is characterized in that filtration washing is to add filtering layer in the settling tank bottom, and at bottom outlet unit control valve, floating valve-off when washing, floating open valve after washing end, carry out filtration washing, dissolve residual sodium chloride salt powder with recirculated water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104642 CN87104642A (en) | 1988-07-06 | 1988-07-06 | Producing soda by solid-phase process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104642 CN87104642A (en) | 1988-07-06 | 1988-07-06 | Producing soda by solid-phase process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87104642A true CN87104642A (en) | 1988-08-03 |
Family
ID=4814959
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104642 Pending CN87104642A (en) | 1988-07-06 | 1988-07-06 | Producing soda by solid-phase process |
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| Country | Link |
|---|---|
| CN (1) | CN87104642A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227438A1 (en) | 2020-04-08 | 2021-11-18 | 郑州奥罗拉环保科技有限公司 | Method for co-producing sodium bicarbonate and ammonium sulfate from sodium sulfate |
-
1988
- 1988-07-06 CN CN 87104642 patent/CN87104642A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227438A1 (en) | 2020-04-08 | 2021-11-18 | 郑州奥罗拉环保科技有限公司 | Method for co-producing sodium bicarbonate and ammonium sulfate from sodium sulfate |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |