In the last tweet, I sorted out for you the typical cases and corresponding preventive measures of production safety accidents in the field of wastewater treatment facilities (limited space operations). It is hoped that all enterprises can further standardize the operation mode of limited space, take the case as a reference, and improve the safety protection and scientific rescue capabilities.
In this issue, typical cases of sewage pool (tank) collapse accidents will be launched, and all enterprises should strictly control the quality and technology of various construction projects, especially environmental protection facilities and equipment such as sewage pools, and do a good job in risk management and control during project construction, and put an end to illegal design and illegal construction.
[Details of the case].
On May 14, 2021, a printing and dyeing enterprise in Shaoxing produced as usual, and the shift change of the washing workshop ended. At 19:17, it was found that the middle of the outer wall of the sewage pool (a sedimentation tank) was bulging outward, and the wall instantly began to collapse from the middle. Two cooling towers and waste gas treatment devices at the top of the sewage tank (a sedimentation tank) rush to the opposite washing workshop with sewage and sludge, and knock down part of the wall on the south side of the workshop. The accident caused one death and one injury, resulting in a direct economic loss of about 1.95 million yuan.
[Cause of the accident].
1.Direct Cause:The enterprise did not follow the requirements of the construction design drawings, took the lead in changing the design structure of the sewage pool without authorization during construction, and violated the process design requirements to use aluminum trichloride solution as a sewage treatment agent for a long time, resulting in a large amount of rust and rust in the concrete beams and concrete walls of the sewage pool, and the tensile bearing capacity of the beam and the bending bearing capacity of the wall exceeded the limit state of the bearing capacity of the beam and the wall, and the pool collapsed due to the local damage of the structure.
2.Indirect causes:(1) The main responsibility of enterprise safety production is not implemented: the enterprise is not equipped with a full-time safety administrator in accordance with the regulations, the safety management is chaotic, the hidden danger investigation and management is not effective, the special hidden danger investigation and rectification of the sewage pool is not carried out according to the requirements of the first department, the third party is not hired to test the sewage pool, the unauthorized change of the construction and construction design of the sewage pool, and the unauthorized change of the treatment process to use aluminum chloride solution as a sewage treatment agent. In particular, on March 9, 2021, after the accident of safety production fatalities occurred in the enterprise, it failed to pay enough attention, and the safety awareness was extremely weak.
2) The management of the construction unit of the sewage station is not standardized: the internal management is chaotic, the project manager does not have the professional qualification certificate of the constructor, the construction is not in accordance with the requirements of the national standards, the construction quality does not meet the relevant national safety standards for construction projects, and the construction changes have not been formally designed.
3) Illegal design of the design unit: without formal design certification, the process design will be changed according to the requirements of the enterprise, the process design drawings will be issued, and the height of the pool body will be increased.
1. Enterprises should earnestly fulfill the main responsibility of production safety, and strictly control the quality and technology of various construction projectsIn particular, in the construction of environmental protection facilities and equipment such as sewage pools, it is necessary to do a good job in risk management and control, put an end to illegal design and illegal construction, and focus on the implementation of safety production responsibilities in key links such as design, construction and installation, and completion acceptance. At the same time, enterprises should further strengthen the daily safety production management, and further promote the investigation and management of hidden dangers and risk identification and control of environmental protection equipment and facilities.
2. Enterprises should establish a safety production risk management and control responsibility system of "responsibility at all levels, everyone is responsible, and everyone is responsible" in accordance with the requirements of the "Notice on Comprehensively Strengthening the Work Safety Production Responsibility System for All Employees of Enterprises".Enterprise safety management personnel, key post personnel, team leaders and front-line employees should strictly perform their own safety production duties, strictly abide by the post safety operation procedures, ensure that all employees are responsible for safety production, and strictly prevent all kinds of production safety accidents.
* |Qinghui environmental protection.
Edit |Small fish.
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