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Drying coating technology for sodium percarbonate

A sodium percarbonate and process technology, applied in the field of dry coating technology, can solve the problems of sodium percarbonate and dry coating, and achieve the effects of good fluidity, compact surface and simple production process

Active Publication Date: 2009-05-13
SHANDONG TIANLI DRYING TECH & EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the material used for coating is liquid, it is currently impossible to dry the coating with sodium percarbonate

Method used

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  • Drying coating technology for sodium percarbonate
  • Drying coating technology for sodium percarbonate

Examples

Experimental program
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Embodiment

[0022] Example: by Figure 1 and figure 2 It can be seen that sodium percarbonate is added to the feed bin on the vibrating feeder 3, and the material enters the spray fluidized bed dryer 4 through the vibrating feeder 3 with variable speed regulation, and is mixed in the primary mixing tank 9 and the secondary mixing tank simultaneously. The coating material mixed by feed tank 8 and process hot water is atomized by the two-fluid nozzle and sprayed onto the particles in a fluidized state, and by means of the heat and reaction heat of the sodium percarbonate particles and the coating solution itself, the The coating solution completes agglutination, coating, evaporation and crystallization on the surface of the sodium percarbonate particles, and completes the drying process and cooling process in the spray fluidized bed dryer 4 . Part of the fine particle material entrained by the exhaust gas in the spray fluidized bed is separated by the built-in bag filter 25 of the spray flui...

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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 [0001] The present invention relates to a kind of dry coating technique, specifically a kind of technique of utilizing spray fluidized bed to carry out the dry coating of sodium percarbonate. Background technique [0002] Sodium percarbonate is a new multi-purpose oxygen-based bleaching agent, which has the characteristics of bleaching, sterilization, washing, and good water solubility. However, sodium percarbonate is prone to decompose when placed in the air for a long time. If the finished product material of sodium percarbonate is required to have slow release, one or two layers of other materials must be added on the surface of the dried particles (this process is called coating). ), to delay the dilution in the subsequent use of the material, that is, after a period of time, the material on the surface of the particle is diluted, and then the particle material is used. Because the material used for coating is liquid, it is currently impossible to dry th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/04C01B15/10
Inventor 苗帅蒋斌郭文付旭东苗楠
Owner SHANDONG TIANLI DRYING TECH & EQUIP
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