Soy sauce production may involve raw-material preparation, fermentation or acid hydrolysis, heating, mixing, settling and final product storage.

Although the hydrolysis reactor and the soy sauce storage tank may look similar, they operate under very different conditions. The reactor must withstand acid, heat and mixer loads, while the storage tank requires a smooth, cleanable inner surface and a material system suitable for the applicable food-contact requirements.

Hebei Yingnai provides customized FRP/GRP reactor tanks and soy sauce storage tanks based on the customer's actual production process.

In an acid-hydrolyzed soy sauce or seasoning process, the reactor may be exposed to hydrochloric acid, elevated temperature, solids and continuous mixing.

The tank cannot be designed according to capacity alone. The following conditions must be confirmed first:

For demanding acid and high-temperature service, a phenolic epoxy vinyl ester resin system such as DERAKANE 470 may be considered for both the corrosion barrier and structural laminate. Final resin selection must be confirmed against the actual acid concentration and temperature profile.

The reactor can also be designed with:

The reactor should remain reliably vented and must not be operated as a sealed pressure vessel unless it has been specifically engineered for that condition.

After hydrolysis, fermentation, filtration or blending, the finished soy sauce requires a separate storage tank.

Unlike the reactor, the storage tank normally does not require the same high-temperature acid-resistant structure. Its inner resin system should instead be selected according to the customer's applicable food-contact regulations and product conditions.

A customized FRP soy sauce storage tank can include:

The smooth internal surface helps simplify cleaning and reduces areas where product residue may accumulate. Drain, manway and nozzle positions can be arranged according to the customer’s production layout.

Food-contact suitability is not determined by the word “FRP” alone. The inner resin, manufacturing process, curing condition and applicable local regulation must all be confirmed before production.

For a typical 40 m³ production requirement, an initial configuration may use:

The hydrolysis reactor and storage tank may use similar external dimensions, but their laminate structure, resin system, reinforcement, nozzles and operating limits are designed separately.

All dimensions and thicknesses must be verified according to the actual process, mixer loads, wind load, seismic conditions, foundation and installation location.

FRP tanks provide several practical advantages for soy sauce production:

The most important advantage is design flexibility. The reactor can be engineered for acid, temperature and agitation, while the storage tank can focus on cleanability, drainage and food-contact requirements.

Please provide the following information when requesting a quotation:

Hebei Yingnai can review these parameters and prepare a preliminary tank configuration, material proposal and quotation.