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Supermarket refrigerated showcase energy-saving transformation (three)
author: supermarket refrigerated showcase category: commercial refrigeration Views: 795Time: 2016-08-22
supermarket refrigerated showcase energy-saving transformation (three)
safe operation The safety devices in the refrigeration system have played a good role in guaranteeing the occurrence of abnormal dangerous situations in production and operation and preventing explosions or major accidents. However, major accidents caused by violation of safety technical regulations still occur from time to time. Therefore, it is necessary to formulate scientific and reasonable safety operation supermarket refrigerated showcase regulations, and strictly abide by them to prevent accidents. In order to make the refrigeration system operate safely, there are three necessary conditions:
The first is to prevent the refrigerant vapor in the system from being abnormally high pressure to avoid equipment rupture;
The second is to prevent misoperations such as wet stroke, liquid explosion, liquid shock, etc. , So as not to damage the equipment;
The third is that the moving parts must not be defective or the fasteners are loose, so as not to damage the machine. Relevant safety operation precautions have been described in detail in the previous chapters and will not be repeated here.
The use and management of refrigerant cylinders must strictly abide by the "Pressure Vessel Safety Supervision Regulations" and "Cylinder Safety Supervision Regulations" promulgated by the State Administration of Labor. Refrigerant cylinders are liquefied gas pressure vessels. The explosion of cylinders is a common accident, which often results in tragic consequences of personal injury and death. The main reasons for explosion accidents are as follows.
(1) exceeds the allowable filling volume.
(2) Cylinders that have exceeded the expiration date.
(3) Use damaged and defective cylinders.
(4) Cylinders that use other explosive or combustion-supporting gases have not been cleaned.
(5) The temperature of the storage location is too high or exposed to the sun. According to the statistics of the labor department, about 90% of the explosion accidents of supermarket refrigerated showcase ammonia bottles are caused by over-installation. This shows that the nature of the accident is a liability accident. Experience has proved that a steel cylinder filled with liquid ammonia can explode in 30 minutes on a field exposed to sunlight, and the explosion rate is 100%. In order to ensure production and personal safety, the filling, use, transportation and storage of refrigerant cylinders must comply with relevant safety technical requirements.
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