Liquid ammonia is a kind of volatile ammonia gas, which can be converted into gas ammonia after gasification. It can absorb a lot of heat. It is known as "refrigerant". Therefore, liquid ammonia as refrigerant is widely used in industrial production.

At present, liquid ammonia refrigeration technology is relatively economical in about 80% of refrigeration system projects in China, such as cold storage, food processing, beer, beverage, petrochemical and other projects. Liquid ammonia is usually in the state of high pressure into liquid, evaporation will emit a lot of heat, so once a large amount of leakage, human contact will be light skin and eyes burned, severe asphyxia sudden death. If the use and storage of liquid ammonia is not standardized, it is very prone to accidents. According to the "Safety Operating Regulations for Liquid Ammonia", the road in front of liquid ammonia tank area must be kept unblocked. Open fire and heat source should be prohibited within 15 meters of liquid ammonia tank equipment.

Because ammonia refrigerant has the characteristics of flammability, toxicity and corrosiveness, in order to make the ammonia refrigeration system run safely and avoid the occurrence of hazards, enterprises should install the control system in every link of the use, through perfect design, complete protection and standard operation. Today, special inspections have been carried out on refrigeration enterprises involved in the case to eliminate potential safety hazards.

Qingdao, Shandong

74 original ammonia-related refrigeration enterprises and 12 ammonia extraction enterprises in Chengyang withdraw from refrigeration field

Since the special renovation of ammonia-related refrigeration enterprises was carried out in Qingdao in 2013, the special law enforcement, inspection and acceptance of ammonia-related refrigeration enterprises have achieved remarkable results, and the safety situation of ammonia-related refrigeration enterprises has been steadily improved. Up to now, 74 ammonia-related refrigeration enterprises in the whole region have withdrawn from the refrigeration field by pumping ammonia, and 23 have converted ammonia into other media. There are 39 ammonia-related refrigeration enterprises in the whole region. Since this year, Chengyang District Safety Supervision, Fire Protection, Market Supervision and other functional departments have jointly conducted a comprehensive inspection of 39 ammonia-related refrigeration enterprises in the region. A total of 273 problems and hidden dangers have been found, and 3 enterprises have been filed for investigation and punishment, with a total fine of 50,000 yuan. At present, all 39 ammonia-related refrigeration enterprises in the region have passed the acceptance test.

Taiyuan, Shanxi

Developing acceptance work for special treatment of liquid ammonia in ammonia-related refrigeration Enterprises

Recently, Taiyuan City Safety Supervision Bureau, together with the city's liquid ammonia refrigeration experts, has checked and accepted the special treatment of liquid ammonia use in 13 ammonia-related refrigeration enterprises in the city. The acceptance personnel compared with the special management plan of provinces and municipalities and the "Guidelines for acceptance and acceptance of the special treatment of liquid ammonia refrigeration in Shanxi Province", after on-site inspection and verification: five enterprises such as Qingdao Beer (Taiyuan) Co., Ltd. met the acceptance conditions for the special treatment of liquid ammonia use; four enterprises such as Niuniu Cold Drink Processing Plant in Xiaodian District had weak basic management and did not meet the acceptance conditions for the special treatment and acceptance The District Security Supervision Bureau issued the rectification instruction within a time limit and completed the rectification before the end of July; Taiyuan Qingxu County Changsheng Food Co., Ltd. and Sun Shen Dairy Co., Ltd. were in a state of suspension and did not meet the acceptance requirements; Taiyuan Fisheries Company planned to carry out cold storage transformation due to insufficient safety distance; Yingze District Security Supervision Bureau had issued the order of suspension; Taiyuan Cattle and Mutton Processing Factory due to urban road construction, When it comes to demolition, it is obliged to rectify existing problems and ensure the safety before demolition.

Hangzhou, Zhejiang

Overall inspection of ammonia-related special equipment in half a month

Ammonia-related special equipment, in the cooling room, refrigeration room, ice storage and other cold rooms will be used. Recently, the Development Zone Market Supervision Sub-Bureau has carried out a 15-day special safety inspection of ammonia-related special equipment, and carried out the investigation and rectification of potential safety hazards for ammonia-related enterprises in the zone.

At present, there are many refrigerators in the development zone, and ammonia-related equipment has been used for a long time. In order to ensure the implementation of special inspection actions, the Market Supervision Bureau formulated a special renovation work program for special equipment in the ammonia refrigeration industry to further clarify the division of responsibilities. In accordance with the requirements of the territorial and business managers, this action takes the lead of the market supervision sub-bureau and the cooperation of relevant departments.

In addition, in conjunction with the monthly activities of safety in production, the market supervision sub-bureau also organizes emergency rescue drills for liquid ammonia leakage accidents to improve the enterprise's ability of rapid emergency rescue and disposal. Starting from the requirements of actual combat, the drill is organized and implemented strictly according to the requirements of the plan in the aspects of plan start-up, on-site command, on-site vigilance, personnel evacuation, emergency repair, personnel rescue, equipment repair, environmental monitoring, and post-treatment.

In order to further enhance the knowledge of liquid ammonia use in enterprises, the market supervision sub-bureau also organizes enterprise managers to conduct centralized training. Through playing accident videos and analyzing leak cases of liquid ammonia, it publicizes the knowledge of safe use of liquid ammonia and emergency treatment. In the meantime, the market supervision sub-bureau also invites industry experts to explain and demonstrate on the production site of enterprises, impart safety production knowledge face to face, and issue special equipment safety use manuals and warning education wallcharts to enterprise managers and operators.

Gansu Tianshui

Qin'an County Holds the Promotion Meeting of Special Regulation Work for Ammonia-related Refrigeration Enterprises

On July 25, Qin'an County held a special renovation Conference for ammonia-related refrigeration enterprises in the whole county. Yang Xichun, Secretary of the Standing Committee of the County Committee, Political and Legal Committee, Ding Chicheng, deputy county head of the county government and deputy director of the county security committee, and members of the leading group of the special renovation work of the county ammonia-related refrigeration enterprises and the responsible persons of the relevant Town Government participated in the meeting. The meeting briefed the county on the completion of the rectification of ammonia-related refrigeration enterprises; signed a list of tasks for the special rectification departments of ammonia-related refrigeration enterprises; and fully arranged and deployed the special rectification work of the county's ammonia-related refrigeration enterprises. It was pointed out that the relevant departments and towns should take the special renovation of ammonia-related refrigeration enterprises as the top priority of their current work and put them on the important agenda as well.

A handicraft project is closely watched. We must do a good job of rectification work with a solid style and rigorous attitude. We must rely on solid responsibility, strengthen measures, and make every effort to carry out the work to ensure that the rectification is completed on time. The meeting demanded that all relevant units should raise awareness, consolidate responsibilities, carry out corrections in accordance with the list of tasks signed by the special rectification functional departments; all functional departments should be stationed in the enterprises under their jurisdiction to supervise, concentrate their efforts, serve wholeheartedly and implement corrections; all relevant units should cooperate with each other, make good records, and concentrate time on rectification and improvement. In fact, we will resolutely complete the task of rectification with quality and quantity by August 25.

Luzhou, Sichuan

Successful Emergency Exercise of Ammonia Leakage Emergency in Xuyong County

Recently, Xuyong County organized an emergency rescue drill for "ammonia leak" in Luzhou Said Cement Co., Ltd. 25 townships, 22 departments and 20 key industrial enterprises in the county were observed on the spot. The drill simulated an ammonia leak accident in Luzhou Side Cement Co., Ltd. and some employees were injured and trapped in the workshop. After the accident, the enterprise immediately starts the emergency plan. At the same time, organize personnel to carry out rescue in groups. In a very short period of time, trapped workers were rescued in time and sent to the hospital for treatment. The people in the downwind area transferred safely. The leak point was successfully blocked. The air quality in the downwind area of the accident point reached the standard. The water quality of the river outside the factory was not polluted. The accident was completely controlled. The hidden dangers were basically eliminated. The drill was successfully completed.

Source: Refrigeration Business