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Wet salt cold drying anti-caking device and method

An anti-caking and cold-drying technology, applied in the direction of drying gas arrangement, drying solid materials, drying granular materials, etc., can solve the problems of ion membrane damage, potassium ferrocyanide toxicity, etc., to reduce moisture absorption and evaporation, fluidization Smooth, reduce the effect of sticking probability

Pending Publication Date: 2021-09-28
江苏苏盐井神股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] 2. There is a large temperature difference between the temperature of the salt product and the ambient temperature
However, potassium ferrocyanide has a dangerous amount of toxicity. At the same time, the iron ion of potassium ferrocyanide will cause damage to the expensive ion membrane in the chlor-alkali industry. Therefore, choosing a safer anti-caking method is currently being developed by various salt companies. important work, without adding any anti-caking agent salt-free should be said to be the best choice

Method used

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  • Wet salt cold drying anti-caking device and method

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Wet salt with a water content of less than 3% is transported to the fluidized bed by the conveyor belt and dispersed in the drying and cooling section of the fluidized bed. When the air temperature drops to 5°C and the relative humidity is 50%, the air blower is divided into five strands after gaining power (the pressure is 12Kpa), of which three strands enter the drying and cooling section I, and two strands enter the drying and cooling section II;

[0048] (2) The wet salt entering the fluidized bed is in a boiling state under the action of cold wind, heat transfer and mass transfer are carried out in the first section and the second section respectively, and the cooling and drying are completed. ), directly transported to the warehouse for shipment as a bulk industrial product;

[0049] (3) Tail gas after drying in the fluidized bed (sodium chloride content is 4g / Nm 3 ) enters the cyclone separator through the induced draft pipeline to recover powdered salt sepa...

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Abstract

The invention discloses a wet salt cold drying device and method for preventing bulk salt products from caking without adding an anti-caking agent. The device comprises a fluidized bed, a material input device, an air conditioner cold dry air device and a tail gas treatment device. An original external heating type fixed boiling fluidized bed is adopted, an external heating device is omitted, a constant-temperature and constant-humidity air conditioner unit cools and dehumidifies environment air, then cold dry air directly cools and dries wet salt, and the salt product caking phenomenon caused by temperature and humidity changes is effectively avoided.

Description

technical field [0001] The invention belongs to the field of vacuum salt production, and relates to a wet salt cold drying anti-caking device and method. Background technique [0002] Table salt, an ionic compound composed of chlorine and sodium elements, has the chemical formula NaCl. Pure salt crystals are colorless and transparent cubic crystals. Due to the presence of impurities, salt in general is white cubic crystals or fine crystal powders, with a specific gravity of 2.165 (25 / 4°C), a melting point of 801°C, and a boiling point of 1442°C. The relative density is 2.165 g / cm3. It tastes salty and is easy to absorb moisture and deliquesce when exposed to the air. In addition to being used in the food industry, it is also widely used to produce chlorine, hydrogen, hydrochloric acid, caustic soda, soda ash, chlorate, and hypochlorite. , bleaching powder and sodium metal, etc., are important chemical raw materials. [0003] Vacuum salt production is a common salt producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B3/08F26B21/00F26B21/08F26B25/00
CPCF26B3/08F26B3/082F26B21/003F26B21/086F26B21/004F26B25/005F26B2200/08
Inventor 周海峰贺向前胡金荣李少军刘建军马龙宁
Owner 江苏苏盐井神股份有限公司
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