The solution of changing ammonia system to fluorine system in large cold storage

In recent years, due to the occurrence of many safety explosion accidents in the ammonia system, the local safety departments have increased the supervision of the ammonia refrigeration system, and proposed that the new project should not use the ammonia system as much as possible, and the previous ammonia system had conditions. Change to a fluorine system whenever possible. This has brought new market opportunities to those of us who do fluorine system refrigeration, and it depends on whether we can seize it.

Due to the significant difference between the ammonia system and the fluorine system, it is not a simple matter to replace the ammonia machine with a fluorine machine. Super recently, provided communication with relevant people and consulted relevant information, and summarized the following solutions for changing ammonia system to fluorine system:

Type: The original ammonia system was transformed into a fluorine-filled liquid-supply glycol system

Retain the original indoor heat exchangers, such as heat exchange evaporator equipment such as ceiling pipes in the warehouse, quick-freezing shelves, air coolers, and spiral evaporating tubes in the ice-making system, but replace the refrigeration host equipment with a special refrigeration unit; The low-temperature carrier refrigerant is sent to the indoor heat exchanger for heat exchange, so as to reach the set temperature. It has the characteristics of simple construction, short modification period, convenient pipeline and low cost. The temperature range can be carried out at 15°C to -70°C. Indirect refrigeration with carrier refrigerant does not have problems such as difficult oil return in direct evaporation system, easy refrigerant leakage, difficult leak detection, uneven liquid separation, etc.; only regular maintenance of the refrigeration host is required, with low failure rate and maintenance. cost savings. The equipment can achieve 10% to 100% energy adjustment according to the actual load of the cold storage, and at the same time, the liquid is supplied by the refrigeration pump, and there are no problems such as pressure loss, cooling loss, and difficult parameter control; its controllability is strong; therefore, the overall energy efficiency ratio is high.

The second type: the original ammonia system is changed to a fluorine bucket pump liquid supply refrigeration system

It is suitable for all kinds of refrigeration systems such as spiral freezers, tunnel-type single freezers, and air-cooled quick-freezers, or to replace the original ammonia cold storage pipes with fluorine pipes. The transformed refrigeration system has high energy efficiency ratio and system stability. , convenient management and so on.

The third type: the original ammonia system is changed to a small air-cooled Freon system

Some workshop air conditioners and small cold storages used in ammonia systems are retrofitted with small air-cooled Freon refrigeration systems. The refrigeration system is simple, the failure rate is low, and each system is opposed to each other, and the energy saving effect is obvious.

The fourth type: the original ammonia system is changed to the ammonia system as the cold source ethylene glycol into the terminal system

Keep the original cold source unchanged, and supply it to the end air cooler by adding a horizontal evaporator and a glycol water pump. This is also a very affordable retrofit solution.

  It should be noted:

1. In the actual transformation case, according to the characteristics of the original ammonia refrigeration system, building structure, thermal insulation characteristics, use requirements (such as in the logistics cold storage, does not affect the normal business storage), cost control and other requirements, provide different scientific and reasonable Refrigeration scheme and construction scheme;

2. Dismantling of the original ammonia system: This work needs to be completed by a specialized company with experience and qualifications, and a detailed dismantling plan needs to be formulated to avoid ammonia explosion accidents in the construction project.

3. The internal cleaning problem of the original ammonia refrigeration system.

In recent years, there has been an explosive growth in the market of ammonia system to fluorine system. I hope everyone will pay attention to this market and have greater gains in this big market.