Method for preventing sodium gluconate wet crystals from caking in drying process

A technology of sodium gluconate and drying process, which is applied in the field of preventing agglomeration, agglomeration and hardening during storage period of wet crystals of sodium gluconate during the drying process, and can solve the problem of difficulty in guaranteeing product quality stability, increasing production costs, increasing energy consumption, etc. problems, to achieve the effects of stability assurance, avoiding moisture return, and improving pass rate

Active Publication Date: 2014-07-02
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is not only time-consuming and labor-intensive, but also increases energy consumption and p

Method used

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  • Method for preventing sodium gluconate wet crystals from caking in drying process
  • Method for preventing sodium gluconate wet crystals from caking in drying process

Examples

Experimental program
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Effect test

Embodiment 1

[0019] After centrifugal separation, the obtained sodium gluconate crystal is 2000kg, the moisture content is 2.5%, the air flow feeder is used, and the flow rate is 50m / s and the temperature is 35℃ by using the fan 2-1, the filter 2-2 and the heat exchanger 2-3. The wet crystals after centrifugal separation are sent to the down-rotating cyclone separator 2-4 by the hopper of the airflow conveying feeder. After the materials are suspended in the separator, the crystals enter the vibrating fluidized bed from the outlet at the lower end of the separator. 2-8.

[0020] After the wet crystal material of sodium gluconate enters the fluidized bed, it is subjected to 3-stage temperature-controlled drying. Using fan 2-9, filter 2-10 and heat exchanger 2-11 to provide wind with a flow rate of 25m / s and a temperature of 40°C, the crystals that have just entered the fluidized bed and move forward with vibration are subjected to the first stage of the cooling process. Drying, drying time...

Embodiment 2

[0022] After centrifugal separation, the obtained sodium gluconate crystal is 2000kg, the moisture content is 3.0%, the air flow feeder is used, and the fan 2-1, the filter 2-2 and the heat exchanger 2-3 are used to provide a flow rate of 50m / s and a temperature of 40°C. The wet crystals after centrifugal separation are sent to the down-rotating cyclone separator 2-4 by the hopper of the airflow conveying feeder. After the materials are suspended in the separator, the crystals enter the vibrating fluidized bed from the outlet at the lower end of the separator. 2-8.

[0023]After the wet crystal material of sodium gluconate enters the fluidized bed, it is subjected to 3-stage temperature-controlled drying. Using fan 2-9, filter 2-10 and heat exchanger 2-11 to provide wind with a flow rate of 30m / s and a temperature of 45°C, the crystals that have just entered the fluidized bed and move forward with vibration are subjected to the first stage of the cooling process. Drying, dryi...

Embodiment 3

[0025] in accordance with figure 2 Schematic diagram of the vibrating fluidized bed drying process device for the wet crystals of sodium gluconate.

[0026] After centrifugal separation, the obtained sodium gluconate crystal is 2000kg, and the moisture content is 3.2%.

[0027] The centrifugally separated sodium gluconate wet crystals fall into the hopper 2-4 of the air flow feeder under the action of gravity, and then use the fan 2-1, the filter 2-2 and the heat exchanger 2-3 to provide a flow rate of 60m / s The wet crystals discharged from the hopper are sent to the down-rotating cyclone separator 2-5 through the conveying pipeline with the wind at a temperature of 35 °C.

[0028] After the sodium gluconate wet crystal material enters the fluidized bed, three stages of temperature-controlled drying are carried out. The first stage of drying is performed by the wind on the crystals that have just entered the fluidized bed and move forward with the vibration. The drying time...

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Abstract

The invention discloses a method for preventing sodium gluconate wet crystals from caking in the drying process and hardening during the storage period. Based on an existing drying process of a vibrated fluidized bed for the sodium gluconate wet crystals, a pneumatic conveying and feeding method is used for replacing an original vibration feeder, and the temperature and wind speed of the air flow for drying are regulated in a segmentation mode, so that the sodium gluconate wet crystals after centrifugal separation have better dispersity when entering the fluidized bed. The drying temperature after the sodium gluconate wet crystals enter the fluidized bed is controlled in a segmentation mode, so that the problems that the sodium gluconate wet crystals cluster and cake in the drying process and get damp and harden during the storage period are effectively prevented. The method for preventing sodium gluconate wet crystals from caking in the drying process and hardening during the storage period largely improves the pass rate of dried products, and guarantees the stability of the quality of products.

Description

technical field [0001] The invention relates to a drying process of sodium gluconate, in particular to a method for preventing agglomeration, agglomeration and hardening during storage period during the drying process of sodium gluconate wet crystals. Background technique [0002] Sodium gluconate, also known as sodium pentahydroxycaproate, is a white or light yellow crystalline powder, easily soluble in water, slightly soluble in alcohol, and insoluble in ether. It is an extremely versatile polyhydroxy organic acid salt, which is widely used in water quality stabilizer, steel surface cleaning agent, special cleaning agent for glass bottles, cement admixture and so on. Especially in terms of cement admixtures, with the development of urban high-rise buildings and urban mixing stations, sodium gluconate has been used as a water reducer and retarder, and has achieved good results. It is rapidly popularized and widely used in the world. [0003] At present, sodium gluconate is...

Claims

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Application Information

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IPC IPC(8): F26B3/092F26B25/00
Inventor 田延军刘建军韩延雷赵祥颖张家祥乔君韩丽
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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