What are the hairtail drying problems?

  The hairtail is flat in shape, tapering from head to tail, silvery gray in body, and black in tail. Dry hairtail has very high nutritional value and contains high-quality protein and various vitamins, which is profit to preventing various diseases such as high blood pressure and promoting the new superseding the old. At the same time, Dry hairtail contains fat, but it is not high. These fats are unsaturated fats, which are beneficial to the development of the brain and improve intelligence more important is that Dried hairtail can effectively prevent bacteria from causing and keep it for a longer time.

How to choose hairtail?

• Look at the size: If the hairtail is full and well-balanced, hard and fleshy, it is a good hairtail; If there is no shine and the meat quality is soft, it is generally inferior hairtail.
• Look at gills: The brighter the gills of hairtail, the fresher it is.
• Look at the eyes: Eyes are bright, eyeballs are swelling, and no dirty objects mean that hairtail is good.
• Look at the body of the fish: The body of the fish is gray or silver-gray. If it is other colors, it means that the hairtail is always no longer fresh.
• Look at the belly of the fish: Observing whether the belly of the fish is soft and broken. If so, it shows that the hairtail has been stored in the freezer for a long time and is about to rot.
• Look at the weight: The weight of hairtail with good quality is generally more than 0.5 kilogram.

The way to dry the hairtail:

  Take out the dried fish and dry them in the sun. At noon, the sun is strong, so it could be covered with cloth. If there is enough sunshine, it could be dried in three days.  
  It's just the traditional way to dry the hairtail. If we use a dehydrator to dry the hairtail, what should we do?Using the dryer to dry the hairtail can save labor cost, and the hairtails are heated evenly without secondary operation. In addition, drying hairtail in this way can save cost, and the drying effect is better than the traditional drying method.

1. Firstly, according to the size and shape of the hairtail, we can cut it into pieces or slices. After cutting, the salt deeply penetrates the fish body by using the saltwater immersion method or salt touching method, which is beneficial to remove some water and extend the storage time of dried hairtail.
2. Secondly, controlling the interval between each hairtail to ensure enough circulating wind can not only prevent steam from stopping on the rain surface but also reduce the temperature step difference so that the dried fish in different positions are generally the same.
3. Then, temperature and humidity are also important factors for drying hairtail in a dehydrator. Hairtail belongs to aquatic products, which has high water content and certain fat content in meat products, which is different from some meat and poultry foods that can be dried at high temperature. The drying of hairtail is usually based on temperature control and dehumidification. Usually, the drying temperature needs to be controlled in a lower temperature range. Beyond this range, some hairtails suffer from serious grease. In addition, the fish baked at too high a temperature is easy to turns yellow. The color of fish baked at low temperature is easier to keep the primary color and the appearance is better.
4. Last, turn on the cooling tower immediately after taking it out of the dehydrator, take away the heat in the dryer in time, and keep the cold and dry environment between 20-30 degrees. If there is no cooling tower, the high temperature will affect the quality after drying. Notes: The temperature of tilapia in the first stage of drying should not exceed 40℃ to 45℃, so it is not easy to crust. Tilapia dried generally adopts the drying process of low-temperature dehumidification. In the early stage, let the internal water be released slowly, so as not to form crusts on the surface. In the later stage, the temperature can be raised slowly until the drying degree meets the requirements. In the drying process, the moisture should be drained in time to avoid the fish from changing taste.

The principle of hairtail dryer machine working 

  Baixin air energy heat pump dryer uses the reverse Carnot principle. The refrigerant is compressed by the compressor to become high-temperature and high-pressure gas, enters into the heat exchanger through the pipeline, and then passes through the fan to remove the heat generated by the heat exchanger send it to the drying room to heat and dry the seafood products and other materials, so that the seafood products are dried, and the moisture is discharged from the moisture outlet. The dehumidification system has a heat recovery device, and the recovered heat is used to heat the fresh air, which can save 60%-70% of the fresh air preheating energy consumption.

The hairtail heat pump dryer machine structure 
 

Hairtail drying video：