Welder's safety regulations:
1, the operator must undergo professional safety and technical training, examination, holding a "special operations license" before being allowed to go on duty and operate independently, non-welder is strictly prohibited to carry out welding operations.
2, the operation should wear good welding suit, insulated shoes and welding gloves, protective mask and other safety supplies.
3, welding operations around the site within 10 meters shall not be stacked flammable and explosive substances.
4, before the operation should first check the welding machine and tools, such as welding tongs and welding cable insulation, welding machine shell protective grounding and welding machine wiring points, etc., to confirm the safety of the work.
5, the welding machine is not allowed to be placed in a hot or humid place, in the wet place of operation should be insulated, rain can not work in the open air to prevent electric shock.
6, work in the container to have good insulation, good ventilation, and supervision before work. Welding container pipe, should be cleaned up its internal debris, to confirm the safety of the work.
7, work in the middle of leaving the workstation, the current switch must be cut off, after the end of the work, to do the work is done, to check the scene of the sparks, fire residue, proper disposal of residual fire, and cut off the power supply.
8, welding wire shall not pass near the acetylene, oxygen or flammable gas pipeline, and can not be in the same trench with these pipes.
9, remove the slag, should wear protective goggles to prevent the slag splash into the eyes.
10 welding machine to have professional maintenance, if there is a failure to be disassembled and repaired, should be responsible for the electrician, welders are not allowed to dismantle or modify the electrical equipment.
Expanded information:
The main treatment structure of primary sewage treatment plant is the sedimentation tank. Secondary wastewater plants then add a bioreactor (aeration tank, biofilter, bio-turntable or aerated biofilter, etc.) and a post-sedimentation tank.
Because before and after the sedimentation tank and the role of the difference, it is often referred to as the former for the initial sedimentation tank, the latter for the secondary sedimentation tank. There are also auxiliary facilities and facilities for the treatment of sludge in the sedimentation tank. Auxiliary facilities are generally grids and sand sinks (also known as the miscellaneous particles pool).
Grids remove lumps and pieces of cloth. The sedimentation tank removes easy-to-sediment materials so that they do not accumulate in the subsequent deep tanks and affect operation. Facilities for handling sludge are typically digesters and dewatering equipment (drying beds or dewatering machines). Wastewater treatment plant buildings usually have pump houses, laboratories, sludge dewatering machine rooms, and repair plants. Activated sludge process wastewater plants often also have a blower or air compressor room.