Large bar ice machine and large block
ice packing machines, also called large ice block machine, large ice block machine, are large-scale machinery used for large-scale production of ice cubes of more than 20 kilograms. At present, there are two main categories of large-scale
block ice machines in China, one is ammonia system ice maker, and the other is fluorine system ice maker. Due to the use of two different refrigerants, ammonia and fluorine, the two systems are completely different. Therefore, companies that usually need to purchase large block ice machines should pay special attention to their own situation and make selections during the inspection phase. Here are five precautions in the selection: 1: National policy Ammonia system large block ice machine has the following safety hazards: ammonia is toxic, flammable and explosive, and accidents occur in the domestic ammonia system from time to time; a small amount of ammonia leakage can cause storage Products are contaminated, and a large number of leaks endanger personal safety. Therefore, it is not only inconvenient in the application of refrigeration places, but also poses a threat to nearby residents. The government does not allow the use of ammonia systems in residential areas and places with high crowds. Therefore, before choosing, it is necessary to understand the situation with the relevant national safety supervision department to confirm whether the construction of a large block ice machine for the ammonia system is allowed. The fluorine system large block ice machine does not have this problem. 2: Safety requirements. Due to the complex structure and many pressure vessels of the large block ice machine of the ammonia system, stricter safety protection measures are required. The refrigerating machine room and equipment room should be equipped with sufficient water source and ventilation facilities for rescue accidents. A special cabinet for accident rescue items should be installed in the convenient place near the machine room or equipment room, and oxygen breathing apparatus (or air breathing apparatus) should be installed in the cabinet. , Gas protective clothing, alkaline filter tank, gas mask, rubber protective gloves, rubber water pipes and other protective equipment. The machine room and equipment room are equipped with necessary emergency repair tools, such as pipe pliers, movable handles, various specifications of pipe clamps, rubber plates, asbestos plates, valves, fillers, iron wires, screwdrivers, pliers and other tools. Equipped with a certain number of rescue medicines, including: citric acid, boric acid and acid concentrated lemon juice, plum juice or edible vinegar, etc. Rescue items and medicines should be inspected and inspected on schedule, and various safety appliances should be replaced in time, and they must be inspected before they can be used. The production unit of the large block
ice packing machines of the ammonia system must prepare a safety emergency plan. When any employee discovers that an accident is about to occur or has occurred, he should immediately report it according to the accident reporting procedure. The leader who receives the report should immediately rush to the accident site and at the same time according to the occurrence of the accident. And the development situation, it is determined to start all or part of the plan. Even when some of the plans are activated, the rescue organization should be required to enter the state of preparation and be ready for rescue at any time. 3: Operating cost. In industrial refrigeration, the ammonia system has been applied for more than 70 years, and there has been no major technological advancement for many years. Due to the high cost of control valves and components, the cost of automation is high, so domestic applications have not been able to achieve full automation. Moreover, due to the strong operational expertise, the large block ice machines of the ammonia system generally operate 24 hours a day, requiring a large number of professional and technical personnel to take turns to take care of them, which results in high labor costs for operation. In addition, there are many refrigeration components in the large block ice machine of the ammonia system, and the refrigeration system is more complicated. Routine maintenance and damage repair operations are very complicated, requiring a lot of labor costs and spare parts and materials expenditure. 4: Purchasing cost The large block ice machine of the ammonia system has the characteristics of large cooling capacity and high power of a single machine. It is still widely used in large-scale refrigeration systems. In many cases, it is because the engineers of the design institute are familiar with the ammonia system and are used to designing the refrigeration system. Since the cooling capacity of a single ammonia machine can reach 250 kW or more, and the maximum fluorine machine (low temperature condition) is 100kW, if it is to be used for large cooling capacity, multiple machines must be connected in parallel. Therefore, at high power (above 100kW) In the case of ), the price of the ammonia machine is obviously lower than that of the fluorine parallel unit. However, due to the large power of a single ammonia machine, when used in a multi-temperature process environment, it is difficult to adjust and consumes high energy. In addition to the unit, the large block ice machine of the ammonia system also has many auxiliary equipment such as liquid storage tanks and circulating barrels (commonly known as bottles and cans). These equipment have high requirements for space (generally the height of the machine room is above 7M), and the machine room covers an area (About 4 to 5 times of fluorine machine). Therefore, in terms of plant, the large block ice machine with ammonia system is more expensive than the large block ice machine with fluorine system. 5: Technical personnel The large block ice machine for ammonia system requires the professionalism of technical personnel, especially maintenance and repair personnel. Therefore, the training time and intensity of relevant technical personnel is long, and the working environment has certain health hazards. There are fewer and fewer young people willing to learn relevant skills, so it is more difficult to recruit personnel, and wages are more demanding. This is also a problem that many buyers don't easily think of in the early stage.
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