CN100368282C - Sodium percarbonate dry method granulation processes and apparatus thereof - Google Patents
Sodium percarbonate dry method granulation processes and apparatus thereof Download PDFInfo
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- CN100368282C CN100368282C CNB2006100690089A CN200610069008A CN100368282C CN 100368282 C CN100368282 C CN 100368282C CN B2006100690089 A CNB2006100690089 A CN B2006100690089A CN 200610069008 A CN200610069008 A CN 200610069008A CN 100368282 C CN100368282 C CN 100368282C
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Abstract
The present invention relates to dry sodium percarbonate pelletizing process and apparatus. In the apparatus including a fluidizing section, a fluidizing and spray pelletizing section, a drying section and a cooling section, the powdered heavy sodium carbonate fed through the feeder to the fluidizing bed and water solution of hydrogen peroxide sprayed through nozzle in high speed rotating state react in the fluidizing section to produce granular sodium percarbonate, which is then dried, cooled and packed as the product. The apparatus includes a lower box, an air distributing plate, a fluidizing section and an upper box, and has a spraying device. The present invention has the advantages of high hydrogen peroxide utilizing rate, low production cost, short technological process, etc.
Description
Technical field
The present invention relates to a kind of production technique of industrial chemicals, specifically a kind of sodium percarbonate dry method granulation processes and equipment thereof.
Background technology
We know that SPC-D has another name called sodium carbonate peroxide, are a kind of compounds that is formed by hydrogen bond by yellow soda ash and hydrogen peroxide, and molecular formula is 2Na
2CO
3.3H
2O
2, theoretical active oxygen level is 15.28%.Its application is very extensive, and as washing auxiliary detergent, it has odorless, advantage such as nontoxic, pollution-free, has bleaching action owing to decompose the active oxygen that produces in water, and shows very strong soil removability, and do not hinder fiber; It is compared with general washing auxiliary detergent, and its cost is low, at low temperatures solubleness big (10 ℃, 12.3%; 20 ℃, 13.14%), be more suitable for winter and cold district; In washing composition, the aromatising flavour additive there is not destruction.In addition, SPC-D is the preservation agent of vegetables and food, is sterilizing agent, sterilant and the washing composition of food and tableware.Also be used as first-aid oxygen supply source, the oxygenant in first aid surface treatment agent and the organic synthesis in the medical treatment.
The general preparation method of SPC-D has two kinds: wet method and dry method (fluidized bed process).Wet method is with the aqueous hydrogen peroxide solution and the soda ash aqueous solution, makes raw material with suspension and mixes in the equipment that good heat exchange and powerful whipping appts are arranged, and product separates with whizzer or strainer, the dry then finished product that gets.The technology of wet method preparation is simple, but operation is many, and productive rate is low, and product stability is poor, in the reaction yellow soda ash consumption many, used salting-out agent etc. also can have certain influence to the performance of product in the wet method preparation, discharging of waste liquid can cause certain environmental pollution.
Dry method (fluidized bed process) be meant with aqueous hydrogen peroxide solution and sodium carbonate solution according to a certain percentage respectively or moment continuously spray into after mixing and contain in the SPC-D crystalline fluidized-bed, utilize the heat energy of fluidizing agent and the heat that reaction produces, take away moisture with gas, product obtains granular SPC-D through cooling section.This kind preparation method flow process is brief, product granularity even, raw material consumption is lower, but shower nozzle is easily stifled, the operational requirement strictness; Remove the needed energy consumption height of large quantity of moisture.
Summary of the invention
The present invention is for overcoming above-mentioned the deficiencies in the prior art, provides that a kind of technology is simple, energy-saving and environmental protection, cost are low, the sodium percarbonate dry method granulation processes and the equipment thereof of reduced investment.
The objective of the invention is to adopt following technical proposals to realize: a kind of sodium percarbonate dry method granulation processes, whole drying process can be divided into fluidisation section, fluidisation mist projection granulating section, dryer section and cooling section.Powdery heavy yellow soda ash is delivered into fluidized-bed by feeding machine, under the wind action that top blast under air distribution plate comes, powdery heavy yellow soda ash is fluidized state on air distribution plate, the aqueous hydrogen peroxide solution that gushes out in the shower nozzle is the high speed rotating state under compressed-air actuated effect, two kinds of materials fully react, constantly grow up and generate sodium percarbonate granules in the fluidisation section; Wet sodium percarbonate granules enters dryer section, and dry intact later sodium percarbonate granules enters cooling section and cools off, and satisfies to discharge finished product from the discharge gate of fluidized-bed behind the dump temperature and pack.
An aqueous hydrogen peroxide solution and a powdery heavy yellow soda ash reaction liberated heat part are used for the sodium percarbonate granules of dry wet, wet branch and another part heat are under the effect of induced draft fan, along with air draft is taken out of fluidized-bed, some tiny particles are also carried secretly into tornado dust collector, through the one-time dedusting refrigerative hot blast of tornado dust collector, the fine particle of being carried secretly is collected at the air sealer place of tornado dust collector bottom; The wind that ejects from the tornado dust collector top enters the further dedusting of sack cleaner again, and the molecule that tornado dust collector do not have to have collected is collected in the bottom of sack cleaner; The wind that comes out from sack cleaner is by the emptying of induced draft fan suction chimney.
A kind of sodium percarbonate dry method granulation equipment---fluidized bed pelletizer; comprise lower box, air distribution plate, fluidisation section and upper box; on lower box and air distribution plate, be respectively equipped with spraying plant; described spraying plant is two fluid shower nozzles; high-pressure air passage in it twist; two fluid shower nozzles are equilateral triangle on air distribution plate arranges, and is provided with guide cylinder below the two fluid shower nozzles, is provided with the spraying air compartment below the guide cylinder.
What raw material of the present invention was used is the powdery Soda Ash Danse, rather than sodium carbonate solution, has saved the energy that removes large quantity of moisture like this.Under the fluidizing state, heavy yellow soda ash and vaporific hydroperoxidation, speed of response improves greatly, has shortened the reaction times, has improved yield.
What the present invention adopted is real dried preparation, and process does not have three wastes processing.
The present invention integrates granulation, drying, cools off, and technical process is brief, and facility investment is few, hydrogen peroxide utilization ratio height, and production cost is lower.
The present invention can take away the heat that yellow soda ash and hydroperoxidation produce fast, avoids Yin Wendu to raise and causes the decomposition (because hydrogen peroxide decomposition also can produce a large amount of heats) of hydrogen peroxide, thereby improve the utilization ratio of hydrogen peroxide.Because hydrogen peroxide decomposition also can produce a large amount of heats, a large amount of waste heats will quicken the decomposition of hydrogen peroxide, like this, can cause a large amount of vicious cycle of decomposing of hydrogen peroxide.
The present invention has set up nozzle arrangement by the transformation to fluidized bed air distribution plate and lower box, makes fluidized-bed can finish granulation, drying, refrigerative requirement; Guide cylinder that lower box is set and corresponding air compartment can allow the working order of shower nozzle desirable more; By fluidized-bed is carried out the differentiation of function from the opening for feed to the discharge port, promptly fluidisation section, fluidisation mist projection granulating section, dryer section, cooling section can be finished three kinds of different functions; The shower nozzle of optimization design can form the high pressure draft of high speed rotating, forms better spray effect, makes that reaction is more abundant, the granulation better effects if.
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is the contour structures synoptic diagram of fluidized bed spray granulation machine of the present invention;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is a shower nozzle principle of work structure iron;
Fig. 5 is the arrangement orientation diagram of shower nozzle on air distribution plate;
Fig. 6 is the structure diagram of shower nozzle;
Among the figure, 1. fluid pipeline, 2. compressed air line, 3. spraying air compartment blast inlet, 4. spraying air compartment, 5. guide cylinder, 6. lower box blast inlet, 7. air compartment, 8. air distribution plate, 9. fluidisation section, 10. opening for feed, 11. expanding reach, 12. air outlets, 13. discharge ports, 14. cooling sections, 15. dryer section, 16. fluidization granulation sections, 17. shower nozzles, 18. air filters, 19. gas blower, 20. fluidized-beds, 21. air sealer I, 22. tornado dust collector, 23. air sealer II, 24. sack cleaners, 25. induced draft fans, 26. chimneys.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment: Fig. 2, Fig. 3 are the structural representations of bed spray coating pelletizing machine of the present invention.Fig. 4 is the principle of work structure iron of fog system of the present invention.Fig. 5 is the synoptic diagram of the arrangement mode of shower nozzle on air distribution plate among the present invention.On the basis of traditional fluidized bed plant, set up fog system.Being provided with shower nozzle 17 according to the equilateral triangle arrangement mode on air distribution plate 7, is guide cylinder 5 below the shower nozzle 17, is superoxol fluid pipeline 1 and the compressed air line 2 that leads to shower nozzle 17 in the guide cylinder 5, is spraying air compartment 4 below the guide cylinder 5.As shown in Figure 1, in operational process, wind enters fluidized bed spray granulation machine through air filter 18, gas blower 19 by lower box blast inlet 6, spraying air compartment blast inlet 3, forms turbulent gases through air distribution plate 7.Material enters fluidisation section 9 of the present invention by opening for feed 10, mixes fluidisation with wind on air distribution plate 8.Aqueous hydrogen peroxide solution is sprayed by shower nozzle 17 through fluid pipeline 1, under the drive of the high speed rotating air of coming by high-pressure air pipeline 2, spraying through shower nozzle 17, in fluidisation section 9, form vaporific, carry out sufficient hybrid reaction with the granule materials of high speed irregular movement, generate sodium percarbonate granules.An aqueous hydrogen peroxide solution and a powdery heavy yellow soda ash reaction liberated heat part are used for the sodium percarbonate granules of dry wet, wet branch and another part heat are under the effect of induced draft fan, along with hot blast is taken out of fluidized-bed 20 through air outlet 12, some small particles are also carried secretly into tornado dust collector 22, under the reduction of speed effect of expanding reach 11, greatly partial material is stayed fluidisation section 9; Through one-time dedusting, cooling, the molecule of being carried secretly is collected at air sealer II 23 places of tornado dust collector 22 bottoms hot blast through tornado dust collector 22; The wind that ejects from tornado dust collector 22 tops enters sack cleaner 24 further dedustings again, and the molecule that tornado dust collector 22 do not have to have collected is collected in the bottom of sack cleaner 24; The wind that comes out from sack cleaner 24 is by 26 emptyings of induced draft fan 25 suction chimneys.
In Fig. 1, Fig. 2, fluidized-bed 20 13 fluidisation section 9, fluidization granulation section 16, dryer section 15, cooling section 14 have been divided into from opening for feed 10 to discharge port, after granule materials enters fluidisation section 9, at first carry out fluidisation, the material that is in fluidized state is along with the wind that comes from air distribution plate 8 is advanced to fluidization granulation section 16, and the fog-like liquid of the high speed rotating that heavy yellow soda ash and shower nozzle 17 gush out carries out sufficient hybrid reaction granulation; The sodium percarbonate granules that generates carries out drying in dryer section 15, and dried particle cools off at cooling section 14, when reaching the temperature requirement of packing, discharges drying machine through air sealer I21 from discharge port 13 and packs.Because the present invention can control the particulate size, the product particle size of coming out is even, the balling ratio height, and outward appearance is good.
In Fig. 4 and Fig. 5, what the stroke of guide cylinder 5 the insides was walked is hot blast, and this method can play the atomize of good protection shower nozzle 17, makes the fog-like liquid of high speed rotating regular and even.And the equilateral triangle arrangement mode of shower nozzle 17 on air distribution plate 8 also can allow dressing liquid distribute uniformly in fluidisation section 9, guarantees the uniform mixing of granule materials and dressing liquid, improves yield rate.
As shown in Figure 6, what shower nozzle 17 adopted is two fluid shower nozzles, and promptly liquid and high-pressure air are walked stroke separately, mutually noninterfere respectively.High-pressure air changes the high speed rotating state into by straight line in shower nozzle 17 under the drive of spiral stroke, after the ejection shower nozzle, drive dressing liquid and do high speed rotary motion, forms vaporificly uniformly, carries out even with material in fluidisation section 9 and mixes fully.
Claims (3)
1. sodium percarbonate dry method granulation processes, it is characterized in that: it comprises fluidisation section, fluidisation mist projection granulating section, dryer section and cooling section, powdery heavy yellow soda ash is delivered into fluidized-bed by feeding machine, under the wind action that top blast under air distribution plate comes, powdery heavy yellow soda ash is fluidized state on air distribution plate, the aqueous hydrogen peroxide solution that gushes out in the shower nozzle is the high speed rotating state under compressed-air actuated effect, two kinds of materials fully react, constantly grow up and generate sodium percarbonate granules in the fluidisation section; Wet sodium percarbonate granules enters dryer section, and dry intact later sodium percarbonate granules enters cooling section and cools off, and satisfies to discharge finished product from the discharge gate of fluidized-bed behind the dump temperature and pack.
2. sodium percarbonate dry method granulation processes according to claim 1, it is characterized in that: the gas in the fluidisation section is for further processing, under the effect of induced draft fan, the gas of fluidisation section and part enter tornado dust collector wet the branch, one-time dedusting through tornado dust collector, the fine particle of being carried secretly is collected at the air sealer place of tornado dust collector bottom, the wind that ejects from the tornado dust collector top enters the further dedusting of sack cleaner again, the molecule that tornado dust collector do not have to have collected is collected in the bottom of sack cleaner, and the wind that comes out from sack cleaner is by the emptying of induced draft fan suction chimney.
3. sodium percarbonate dry method granulation equipment, comprise lower box, air distribution plate, fluidisation section and upper box, it is characterized in that: on lower box and air distribution plate, be respectively equipped with spraying plant, described spraying plant is two fluid shower nozzles, high-pressure air passage in it twist, two fluid shower nozzles are equilateral triangle on air distribution plate arranges, and is provided with guide cylinder below the two fluid shower nozzles, is provided with the spraying air compartment below the guide cylinder.
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|---|---|---|---|
| CNB2006100690089A CN100368282C (en) | 2006-09-20 | 2006-09-20 | Sodium percarbonate dry method granulation processes and apparatus thereof |
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| CNB2006100690089A CN100368282C (en) | 2006-09-20 | 2006-09-20 | Sodium percarbonate dry method granulation processes and apparatus thereof |
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| CN100368282C true CN100368282C (en) | 2008-02-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564094A (en) * | 2010-12-22 | 2012-07-11 | 上海宝钢磁业有限公司 | Secondary drying method for manganese-zinc ferrite powder |
| CN102211761B (en) * | 2011-04-11 | 2012-11-21 | 边文阳 | Method for preparing sodium peroxocarbonate by spray drying method and preparation system and application thereof |
| CN103275335B (en) * | 2013-05-20 | 2015-01-07 | 安徽理工大学 | Preparation method of polyethylene wax micropowder and spray granulation system |
| CN109126624B (en) * | 2018-10-17 | 2020-07-28 | 杨松 | Special filter material granulation device for preparing hydrogen fluoride moving bed filter |
| CN115159548B (en) * | 2022-07-14 | 2023-11-10 | 山东天力能源股份有限公司 | Continuous crystallization process of sodium percarbonate |
| CN115893448B (en) * | 2023-02-22 | 2023-08-18 | 昌邑荣信化工有限公司 | Potassium superoxide powder preparation device and method for preparing potassium superoxide powder by using same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118465A (en) * | 1976-03-29 | 1978-10-03 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the preparation of sodium percarbonate as regular rhombohedral crystals |
| CN1132499A (en) * | 1993-08-31 | 1996-10-02 | 底古萨股份公司 | Process for producing granulated sodium percarbonate |
-
2006
- 2006-09-20 CN CNB2006100690089A patent/CN100368282C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118465A (en) * | 1976-03-29 | 1978-10-03 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the preparation of sodium percarbonate as regular rhombohedral crystals |
| CN1132499A (en) * | 1993-08-31 | 1996-10-02 | 底古萨股份公司 | Process for producing granulated sodium percarbonate |
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Owner name: SHANDONG TIANLI DRYING CO., LTD. Free format text: FORMER NAME: TIANLI DRYING EQUIPMENT CO., LTD., SHANDONG |
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Address after: 250101, Shandong Province, Ji'nan hi tech Zone, No. 554 Feng Feng Road, environmental science and Technology Park, building 8, Feng Feng building, room 230 Patentee after: Shandong Tianli Drying Co., Ltd. Address before: 250014 Shandong Province, Lixia District of Ji'nan city ten Road East Shouke Hospital Road No. 19 Patentee before: Tianli Drying Equipment Co., Ltd., Shandong |