With the adjustment of the national offshore fishing industry structure, offshore fishing has begun to shift from nearshore fishing to oceanic fishing. Tuna, as a nutritious and precious aquatic product, will or is enriching our dining table. The domestic and international market prospects are very broad, and the complete set of refrigeration equipment for stacked low-temperature frozen tuna is a key refrigeration equipment for seafood markets in coastal cities and offshore fisheries.

One; Basic knowledge of ultra-low temperature and deep freezing of tuna

High quality tuna must have good freshness and maintain its unique bright red color. In the handling of catch, in addition to ensuring quality during deck handling, it is also necessary to carefully freeze tuna. Freezing work is very complex, and the basic knowledge of tuna freezing should be understood first.

Throughout the entire logistics process of tuna processing. A well-established ultra-low temperature refrigeration chain for tuna is a necessary condition for ensuring the development of the tuna industry, from capture to retail. The refrigerated chain includes tuna longline fishing boats, tuna purse seine tugboats, tuna refrigerated transport ships, tuna land refrigerated warehouses, processing plants, transport vehicles, refrigerators, etc. Due to the ultra-low temperature requirement for tuna freezing (-55 ℃~-60 ℃), the design and manufacturing technology of tuna ultra-low temperature refrigeration chain is an inevitable requirement for the development of fisheries.

II Product and Service Introduction:

Our company relies on the development and design experience of ultra-low temperature cryogenic refrigeration units to meet the requirements of tuna freezing and refrigeration; We can provide users with integrated services including planning, engineering design, equipment construction and installation, equipment production, and maintenance for tuna freezing and refrigeration warehouses. Including frozen tuna storage, refrigerated storage, pre cooling room, etc;

The engineering content includes turnkey projects such as the design and installation of ultra-low temperature cold storage refrigeration (defrosting) systems, production and manufacturing of refrigeration equipment, thermal insulation of warehouses, and electrical automation control. The temperature of the cold storage can reach -40 ℃ to -70 ℃ (adjustable);

The tuna ultra-low temperature cold storage designed and produced by our company has the characteristics of energy saving, stability, and high efficiency; Especially in terms of the stability of the refrigeration system, it is particularly outstanding.

III Technical Parameter

Cold storage temperature:

Freezing room: -55~-70 ℃ (temperature adjustable, can use shelf aluminum flat plate or low-temperature liquid freezer)

Refrigerated room: -50~-70 ℃ (temperature adjustable, aluminum pipes or air coolers can be used as options)

Pre cooling room: -40 ℃ (temperature adjustable, aluminum ducts or air coolers can be used as options)

Refrigeration method: two-stage compression (pre cooling room)+binary cascade refrigeration

4 Equipment situation:

1. The equipment adopts the stacked low-temperature refrigeration unit produced by our company; The evaporation temperature can be within the range of -40 ℃ to -85 ℃, and can provide low-temperature refrigerant for -35 ℃ to -75 ℃ or low-temperature refrigerant for -40 ℃ to -85 ℃; (Equipped with a heat recovery system for defrosting); This device can improve efficiency by more than 30% compared to two-stage compression

2. The main components of the system are made of internationally renowned brand products, and the engineering auxiliary materials can meet the low-temperature requirements;

3. The cold storage control system adopts the German SImens Siemens PLC automation control system, which has a high degree of automation and is easy to operate;

4. Low maintenance management costs

Five application area

This system is not only used in tuna cold storage, but can also be applied to:

Ultra low temperature storage of aquatic products and food

Ultra low temperature storage of biological products

Ultra low temperature storage of chemicals

VI Program features

Compared with previous two-stage compression refrigeration units, it can greatly improve the efficiency of the refrigeration unit and save costs. The stacked binary refrigeration system provides the best service for users in various industries.

Compared with the dual level system, the efficiency has been improved by 30%, and the debugging time of the freezing device has been reduced from 3.5 hours to 1.5 hours.

Compared to a dual level system, it saves approximately 50% of electricity costs.

4. Low maintenance costs

In order to provide customers with more accurate and efficient services, we have formed the following professional functional teams:

Technical Service Department:

Assist customers in calculating, selecting, and selecting equipment based on their various personalized needs;

Design, draw, and determine system configuration plans, and issue system engineering operation manuals;

Answer various technical inquiries from customers.