Talking about dust prevention in steel barrel production edging process (2)

Talking about dust prevention in steel barrel production edging process (2)

Third, the common ventilation method to remove dust

Ventilation is available in both full ventilation and partial inhalation. The use of comprehensive ventilation to control dust is mainly to clean the air and gently and continuously dilute the harmful substances in the entire air of the production site so as not to exceed the allowable concentration, so it is also called dilution ventilation. General ventilation generally requires a much larger amount of air than local inhalation, so it is not as economical as a partial inhalation. Steel drum edging workshops use full ventilation to control soot. Because the grinding wheel set generally has eight, and is relatively scattered, it is difficult to set up a local suction device in terms of process and operation.

Local inhalation is the removal of harmful substances from the source of the source before it is released into the air of the worker's breathing zone. The local suction device is composed of a suction hood, a pipe, an air purifier and a fan. When used for vacuuming, the air purifier is the dust collector.

For houses that use dust suction devices to remove dust, the outdoor air should be sent to the workshop under controlled conditions to replace the exhausted air. Especially in the case of relatively large inspiratory volume, this problem should be paid more attention to. It will cause problems such as the effect of vacuuming, the difficulty of maintaining a comfortable temperature for workers, or the blowing of cold winds to workers. The amount of replenishment air is at least equal to the total amount of air discharged from the workshop by the suction ventilation system, preferably a little more to minimize air leakage around the building.

It must be heated when replenishing air in winter and cool down in summer. Therefore, when designing a local inhalation system, care should be taken to minimize the amount of inhalation or recycle air while ensuring the inhalation effect, but this should not be caused by circulating air. It is a prerequisite for jeopardizing the health of employees.

The soot-containing air sucked away by the local suction system needs to be dedusted and purified before being discharged into the atmosphere. Commonly used dust collectors are mechanical dust collectors, scrubbers, fabric filters and electrostatic precipitators, each of which has many different types. It can be selected according to the situation.

Fourth, the main management of dust prevention

In order to prevent the occurrence of hazards from soot, in addition to technical measures, management should be strengthened. The main contents include: keeping the operating environment clean, keeping the dustproof equipment intact, checking the dustproof effect frequently and conducting dust prevention education and training.

Practice has proved that in the production environment where smoke is generated, even if dust-proof measures are taken, it is inevitable that some smoke will fly away. For a long time, smoke will adhere to the windows, walls, mechanical equipment surfaces and lighting fixtures. These deposited soot should be cleaned regularly. Cleaning dust can be done with tools and equipment such as wet mops, vacuum cleaners, and blow-off sweepers.

As with production equipment, dust-proof equipment must be carefully maintained and intensively repaired to ensure that it can always perform well. A checklist should be prepared to list the premises that must be inspected, and check for incidents at regular intervals. In case of abnormality, the cause should be investigated, necessary repairs, replacements and supplements should be made and recorded.

The effect of dust prevention should be monitored by technical measurements. The content of the measurement is mainly the soot concentration of the working environment and the technical performance of various dustproof devices. This measurement should be carried out frequently and problems should be resolved in a timely manner.

To do dust prevention work, employees should also be educated and trained in dust prevention. The contents should generally include: the hazards of smoke and dust, relevant regulations, dust prevention methods, use and maintenance of dustproof equipment, and management of the working environment. In addition, special training and training on dust control technology and smoke detection methods should be carried out for technicians engaged in dust prevention work.

In recent years, a variety of new welding edge treatment processes have emerged at home and abroad, which proves that people still recognize the impact of the edging environment. These new processes include milling, cleaning, and fully automated high-frequency welding. The milling process eliminates noise and dust, and is a transitional process that is more suitable for general small barrel mills. It is simple and feasible. Although the cleaning process also eliminates noise and dust, it is accompanied by hydrochloric acid and the like to corrode oxides and grease on the weld edges, often accompanied by toxic and harmful gases, and there is also cleaning waste liquid, which is still unfavorable to environmental protection. Therefore, it cannot be promoted. Only the automatic high-frequency welding process is characterized by the advanced nature of the welding machine. The welding edge can be welded without strict treatment, and the processing process is removed, thereby reducing the labor intensity, reducing the production cost, and improving the environmental pollution. This is the replacement process for steel barrel welding.