Sodium saccharin drying technology solutions

1. Overview of Drying Products

Saccharin sodium, also known as soluble saccharin, is the sodium salt of saccharin. It has two crystal waters, colorless crystals or slightly white crystalline powders. It generally contains two crystal waters and is easy to lose crystal water to become anhydrous saccharin. It is white powder, odorless or slightly fragrant, and has a strong sweet and bitter taste. The sweetness is about 500 times that of sucrose. It has weak heat and alkali resistance. When heated under acidic conditions, the sweetness gradually disappears. The solution is bitter when it is greater than 0.026%.

2. Description of Drying Scheme:

Saccharin sodium is mainly produced using spray dryers. In order to meet product quality requirements (moisture, whiteness and particle distribution), the parameters of the entire drying process need to be set one by one. Jianda Drying Equipment Co., Ltd., as an enterprise specializing in the design and production of spray dryers, conducted spray drying experiments on saccharin sodium. Its equipment is our company's LPG-50 spray drying experimental prototype.

We conducted group experiments, taking the same sample size and different inlet air temperatures for experiments. The inlet air temperature distribution is: 260℃, 280℃, 300℃, 320℃, 340℃, and 360℃. The water content of the sample is 14.05%, and the whiteness is 96%. The outlet air temperature is set to 95-105℃.

Test results measurement:

1 Content test (measured by non-aqueous titration method);

2 Whiteness test (measured by digital whiteness meter);

3 Moisture measurement (measured by halogen moisture meter);

4 Particle distribution measurement (200g of dry product is taken from each group, and after sieving through the 60-160 mesh screen of the electric vibrating screen machine, the weight specific gravity of each mesh range is calculated)

Test results:

From the above two tables, we can not find the following rules:

1 The size of the inlet air temperature has little effect on the content of the product.

2 The inlet air temperature has a certain effect on the whiteness. When the inlet air temperature is above 340℃, it can be seen that the whiteness decreases significantly.

3 The inlet air temperature is inversely proportional to the moisture content, and it does not meet the quality requirements below 300℃.

4 The inlet air temperature has a greater impact on the output. The higher the temperature, the more obvious the decrease in the output of a single batch.

5 The influence of particle distribution: The inlet air temperature has little effect on the particle size. After years of experience, we know that the size of the particles is only related to the feed rate and the concentration of the feed liquid.

Parameter setting of sodium saccharin spray dryer

After statistics of the test conclusions, we found that the spray dryer used for sodium saccharin, with the inlet air temperature set at 300-320℃, can meet the production and quality requirements, and also maximize the energy consumption utilization rate.