CN1923907A - Drying coating technology for sodium percarbonate - Google Patents
Drying coating technology for sodium percarbonate Download PDFInfo
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- CN1923907A CN1923907A CN 200610069007 CN200610069007A CN1923907A CN 1923907 A CN1923907 A CN 1923907A CN 200610069007 CN200610069007 CN 200610069007 CN 200610069007 A CN200610069007 A CN 200610069007A CN 1923907 A CN1923907 A CN 1923907A
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- spraying
- fluidized bed
- air
- sodium percarbonate
- drying
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Abstract
The invention discloses a specific dressing drying technology of sodium percarbonate, which comprises the following steps: adopting hot air as drying dielectric; utilizing energy and reflecting heat of sodium percarbonate particle and dressing solution bulk to condense on the surface of sodium percarbonate; coating; evaporating; crystallizing; drying; cooling; adopting different fluidization wind temperature and speed for guide coating area and drying area in the drying course; making the operation more stable.
Description
Technical field
The present invention relates to a kind of dry coationg technology, specifically a kind of technology of utilizing the dry coationg that fluidized bed with spraying carries out SPC-D.
Background technology
SPC-D is that a kind of to have multiduty novel oxygen be SYNTHETIC OPTICAL WHITNER, has characteristics such as bleaching, sterilization, washing, aqueous fusion property be good.But SPC-D is easily decomposed medium-term and long-term placement of air, as require the SPC-D finished product materials to have slow-releasing, the material (this process is called dressing) that must add last layer or two-layer other character at dried particle surface, delay dilution in the material use afterwards, promptly the material on particle surface after a while dilutes, and this granule materials is utilized again.Because the used material of dressing is a liquid, at present can't the SPC-D dry coationg.
Summary of the invention
The present invention provides a kind of production technique simple for overcoming above-mentioned the deficiencies in the prior art, level of automation height, the processing drying coating technology for sodium percarbonate that energy is big, efficient is high.
The objective of the invention is to adopt following technical proposals to realize: a kind of drying coating technology for sodium percarbonate comprises three flow processs: material flow, process gas flow process and process liquid flow process; SPC-D adds the feed bin on the oscillating feeder, oscillating feeder by the variable ratio frequency changer speed governing, enter the spray-fluidized bed dryer, coating material in the process liquid flow process is sprayed onto on the grain bed that is in fluidized state after atomizing by second fluid nozzle simultaneously, makes dressing solution finish aggegation, coating, evaporation, crystallization on the sodium percarbonate granules surface; And in the spray-fluidized bed dryer, finish drying process and process of cooling through the process gas flow process.
The parts of fine granule materials of being carried secretly by waste gas in fluidized bed with spraying returns the fluidisation section of fluidized-bed again after the built-in sack cleaner of fluidized bed with spraying separates, the material in the fluidisation section enters vibratory screening apparatus via air sealer, packs after the classification.
Described drying and process of cooling established technology gas flow process are: to be normal temperature air carry out warm air after the heat exchange through vapor heat exchanger to the drying medium of SPC-D material, and the wind that enters fluidized bed with spraying is divided into wind and secondary air; After one time wind was normal temperature air process vapor heat exchanger II and vapor heat exchanger III heating, II sent into fluidized bed with spraying by gas blower; Secondary air is that I1 sent into fluidized bed with spraying by gas blower after normal temperature air heated through vapor heat exchanger I; The material heat-eliminating medium carries out cooled air for the normal temperature environment air through surface cooler, and cooling air is blasted the cooling segment of fluidized bed with spraying by gas blower II; Atmosphere is drawn and entered to dried waste gas and cooled waste gas by system's induced draft fan after the built-in sack cleaner of fluidized-bed filters.
Described process liquid flow process is: process water is heated to certain temperature in hot-water cylinder, send into mixing tank and secondary mixing batch can by hot water pump, coating material and secondary coating material add mixing tank and secondary mixing batch can respectively, heat mixing, mix back first and second dressing solution and add storage tank and the insulation of secondary storage tank respectively, deliver to by take away pump I and take away pump II respectively and place second fluid nozzle in the fluidized bed with spraying, be sprayed onto in the fluidized bed with spraying by nozzle behind the compressed air atomizing.
Described nozzle is an end spray mode, can make the coating liquid droplet arrive the sodium percarbonate granules stroke and shorten, and has strengthened sticking power, makes the coating material loss few.
Spraying area adopts guiding spouted, uses the speed of circulation of secondary air reinforcing particle, and the spraying center is the gas phase fluidization process, and outer shroud is the concentrated phase fluidization regions, and the fountain flow of formation rule, particle are accepted spray film often, and dressing is more even.
The invention has the beneficial effects as follows:
1. fluidized bed with spraying can once be realized a plurality of operating process such as coating, aggegation, evaporation, drying, crystallization, granulation of liquid material.
2. production technique is simple, and the level of automation height, to handle energy big, the efficient height, and floor space is little, and collection drying, cooling, dedusting are one.
3. fluidized bed with spraying possesses good fluidised form operating process, gas-solid two-phase big area contact, and heat and mass is fast, and the thermo-efficiency height makes the product proper sphere degree height of dressing, surface compact, good fluidity.
4. native system is taked operate continuously, can adopt a coating and shaping and two kinds of Technologies of twice coating and shaping according to the difference of coating material, can control the dressing number of plies and thickness easily.In dressing, also can realize dry and cooling.
5. the accurate control of spouting liquid can be avoided causing dead bed or particle agglomeration occurring because of excessive feed liquid flow surpasses dry ability of being born.
6. the accurate control of particulate movement velocity, in the spray-fluidized bed system, superfluous fluidizing velocity can well reflect the variation of particle motion speed, by the control adjustment to the fluidizing velocity of different zones, particle is in the coated areas, thereby guarantees quality product.
7. the built-in sack cleaner of fluidized-bed has improved the efficiency of dust collection of system greatly.
Description of drawings
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is a fluidized bed with spraying structural representation of the present invention;
Wherein 1, gas blower I, 2, vapor heat exchanger I, 3, oscillating feeder, 4, spray-fluidized bed dryer, 5, air sealer, 6, vibratory screening apparatus, 7, system's induced draft fan, 8, the secondary mixing batch can, 9, mixing tanks, 10, gas blower II, 11, vapor heat exchanger II, 12, vapor heat exchanger III, 13, secondary storage tank, 14, storage tanks, 15, hot-water cylinder, 16, air compressor, 17, buffer tank, 18, high efficiency filter, 19, surface cooler, 20, take away pump II, 21, take away pump I, 22, hot water pump, 23, nozzle, 24, fluidisation section, 25, sack cleaner
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment: as can be seen by Fig. 1 and Fig. 2, SPC-D adds the feed bin on the oscillating feeder 3, material enters spray-fluidized bed dryer 4 by the oscillating feeder 3 of variable speed governing, simultaneously at a mixing tank 9, secondary mixing batch can 8 carries out being sprayed onto on the particle that is in fluidized state after mixed coating material atomizes by second fluid nozzle with technology hot water, and by means of the heat and the reaction heat of sodium percarbonate granules and dressing solution itself, make dressing solution on the sodium percarbonate granules surface, finish aggegation, coating, evaporation, crystallization, and in spray-fluidized bed dryer 4, finish drying process and process of cooling.The parts of fine granule materials of being carried secretly by waste gas in fluidized bed with spraying returns the fluidisation section 24 of fluidized-bed again after the built-in sack cleaner 25 of fluidized bed with spraying separates, material in fluidisation section 24 enters vibratory screening apparatus 6 via air sealer 5, packs after the classification.
The drying medium of SPC-D material is a warm air.The wind that enters fluidized bed with spraying is divided into wind and secondary air.After one time wind was normal temperature air process vapor heat exchanger II11 and vapor heat exchanger III12 heating, II10 sent into fluidized bed with spraying by gas blower, and this burst wind action is the normal fluidisation that keeps SPC-D; Secondary air is that I1 sent into fluidized bed with spraying by gas blower after normal temperature air heated through vapor heat exchanger I2, and this burst wind action is a fluidizing velocity of adjusting nozzle 23 places, causes the particle circulation in each atomizing zone.Atmospheric air is through behind the air compressor 16, enters to have storing compressed air, keeps the buffer tank 17 of air-stable effect, entering fluidized bed with spraying after purifying through high efficiency particle air filter 18.The material heat-eliminating medium carries out cooled air for the normal temperature environment air through surface cooler 19, and cooling air is blasted the cooling segment of fluidized bed with spraying by gas blower II10; Atmosphere is drawn and entered to drying and cooling back waste gas by system's induced draft fan 7 after the built-in sack cleaner 25 of fluidized-bed filters.
Heated process water is sent into mixing tank 9 and secondary mixing batch can 8 by hot water pump 22 in hot-water cylinder 15, coating material and secondary coating material add mixing tank 9 and secondary mixing batch can 8 respectively, heat mixing, mix back one, secondary dressing solution adds storage tank 14 and 13 insulations of secondary storage tank respectively, deliver to by take away pump I21 and take away pump II20 respectively and place second fluid nozzle in the fluidized bed with spraying, be sprayed onto in the fluidized bed with spraying by nozzle 23 behind the compressed air atomizing, in bed, realize dressing SPC-D, drying and cooling.
Claims (6)
1. a drying coating technology for sodium percarbonate is characterized in that: comprise material flow, process gas flow process and process liquid flow process; SPC-D adds the feed bin on the oscillating feeder, oscillating feeder by the variable ratio frequency changer speed governing, enter the spray-fluidized bed dryer, coating material in the process liquid flow process is sprayed onto on the grain bed that is in fluidized state after atomizing by second fluid nozzle simultaneously, makes dressing solution finish aggegation, coating, evaporation, crystallization on the sodium percarbonate granules surface; And in the spray-fluidized bed dryer, finish drying process and process of cooling through the process gas flow process.
2. drying coating technology for sodium percarbonate according to claim 1, it is characterized in that: the parts of fine granule materials of being carried secretly by waste gas in fluidized bed with spraying returns the fluidisation section of fluidized-bed again after the built-in sack cleaner of fluidized bed with spraying separates, material in the fluidisation section enters vibratory screening apparatus via air sealer, packs after the classification.
3. drying coating technology for sodium percarbonate according to claim 1, it is characterized in that: described drying and process of cooling established technology gas flow process are: to be normal temperature air carry out warm air after the heat exchange through vapor heat exchanger to the drying medium of SPC-D material, and the wind that enters fluidized bed with spraying is divided into wind and secondary air; After one time wind was normal temperature air process vapor heat exchanger II and vapor heat exchanger III heating, II sent into fluidized bed with spraying by gas blower; Secondary air is that I1 sent into fluidized bed with spraying by gas blower after normal temperature air heated through vapor heat exchanger I; The material heat-eliminating medium carries out cooled air for the normal temperature environment air through surface cooler, and cooling air is blasted the cooling segment of fluidized bed with spraying by gas blower II; Atmosphere is drawn and entered to dried waste gas and cooled waste gas by system's induced draft fan after the built-in sack cleaner of fluidized-bed filters.
4. drying coating technology for sodium percarbonate according to claim 1, it is characterized in that: described process liquid flow process is: process water is heated to certain temperature in hot-water cylinder, send into mixing tank and secondary mixing batch can by hot water pump, coating material and secondary coating material add mixing tank and secondary mixing batch can respectively, heat mixing, mix back one, secondary dressing solution adds storage tank and the insulation of secondary storage tank respectively, deliver to by take away pump I and take away pump II respectively and place second fluid nozzle in the fluidized bed with spraying, be sprayed onto in the fluidized bed with spraying by nozzle behind the compressed air atomizing.
5. according to claim 1 or 4 described drying coating technology for sodium percarbonate, it is characterized in that: described nozzle is an end spray mode, can make the coating liquid droplet arrive the sodium percarbonate granules stroke and shorten, and has strengthened sticking power, makes the coating material loss few.
6. according to claim 1 or 4 described drying coating technology for sodium percarbonate, it is characterized in that: spraying area adopts guiding spouted, use the speed of circulation of secondary air reinforcing particle, the spraying center is the gas phase fluidization process, outer shroud is the concentrated phase fluidization regions, the fountain flow of formation rule, particle are accepted spray film often, and dressing is more even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610069007 CN100487066C (en) | 2006-09-20 | 2006-09-20 | Drying coating technology for sodium percarbonate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610069007 CN100487066C (en) | 2006-09-20 | 2006-09-20 | Drying coating technology for sodium percarbonate |
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| CN1923907A true CN1923907A (en) | 2007-03-07 |
| CN100487066C CN100487066C (en) | 2009-05-13 |
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| CN 200610069007 Active CN100487066C (en) | 2006-09-20 | 2006-09-20 | Drying coating technology for sodium percarbonate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811315A (en) * | 2015-11-30 | 2017-06-09 | 常州西品科技有限公司 | Household cleaning piece |
| CN106811336A (en) * | 2015-11-30 | 2017-06-09 | 常州西品科技有限公司 | household cleaners |
| CN115026088A (en) * | 2022-06-10 | 2022-09-09 | 合肥中辰轻工机械有限公司 | Bottle washing device for hot canning |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59208279D1 (en) * | 1991-09-03 | 1997-04-30 | Degussa | STORAGE-ENCLOSED ENCODED SODIUM CARBONATE AND METHOD FOR THE PRODUCTION THEREOF |
| US5902682A (en) * | 1993-07-17 | 1999-05-11 | Degussa Aktiengesellschaft | Coated sodium percarbonate particles, a process for their preparation and their use |
| DE19717729A1 (en) * | 1997-04-26 | 1998-10-29 | Degussa | Coated sodium percarbonate particles, process for their preparation and their use |
| DE19830946A1 (en) * | 1998-07-10 | 2000-01-13 | Degussa | Process for the preparation of coated peroxygen compounds |
| CN1435449A (en) * | 2002-07-25 | 2003-08-13 | 钱胜文 | Coated sodium peracrbonate, process for preparing same and use thereof |
| CN1589951A (en) * | 2003-08-27 | 2005-03-09 | 天津渤海化工有限责任公司天津碱厂 | Ammonium chloride dry dusting method |
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2006
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811315A (en) * | 2015-11-30 | 2017-06-09 | 常州西品科技有限公司 | Household cleaning piece |
| CN106811336A (en) * | 2015-11-30 | 2017-06-09 | 常州西品科技有限公司 | household cleaners |
| CN115026088A (en) * | 2022-06-10 | 2022-09-09 | 合肥中辰轻工机械有限公司 | Bottle washing device for hot canning |
| CN115026088B (en) * | 2022-06-10 | 2024-02-27 | 合肥中辰轻工机械有限公司 | Bottle washing device for hot canning |
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| CN100487066C (en) | 2009-05-13 |
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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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| CP03 | Change of name, title or address |
Address after: 250100, 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 |