Safety Precautions for the Installation Site of Urea Melting Granulation Production Line

Safety Precautions for the Installation Site of Urea Melting Granulation Production Line

1. Safety of Working at Height

   The installation of granulation towers and equipment frames mostly involves working at height, and the following requirements must be strictly implemented:

   • All operators must hold valid certificates to work, wear dual-hook safety belts throughout the operation, ensure the safety belts are worn with the upper anchorage point and lower attachment point, and confirm that the anchorage points are firm and reliable.
   • Scaffolding erection must comply with specifications, with protective railings, toe boards and dense mesh safety nets installed. Overloading the scaffolding with equipment or materials is prohibited; scaffolding can only be put into use after passing acceptance inspection.
   • Equipment and components lifted at height must be securely bound. A restricted area must be set up below the lifting zone, and unauthorized personnel are prohibited from entering. Lifting operations must be directed by a dedicated person with clear and unified signals.
   • Cross-operation should be avoided. If cross-operation is unavoidable, rigid isolation layers must be installed to prevent injury from falling objects at height.
2. Safety of Equipment Lifting and Installation
   • Lifting equipment such as cranes and winches must be matched to the weight of the objects being lifted, and the equipment itself must pass inspection and acceptance; overloading during lifting is strictly prohibited.
   • Before lifting, inspect the wear condition of lifting tools (steel wire ropes, hooks, shackles, etc.). Lifting tools with cracks, excessive broken wires and other defects are prohibited from use.
   • When positioning equipment, never directly adjust the equipment position by hand; use tools such as crowbars instead to prevent crushing or pinching injuries.
   • After the installation of large stationary equipment (such as evaporators, melting tanks), it must be fixed in a timely manner to prevent tipping. Temporary supports can only be removed after the equipment is fully positioned and the strength of the secondary grouting meets the required standards.

3. Safety of High-Temperature and Chemical Handling

   The melting temperature of urea is approximately 132.7℃. Although no high-temperature media are introduced during the installation phase, high-temperature risks exist during preheating and pipeline cleaning before commissioning in the later stage, so preventive measures must be taken in advance:

   • When installing high-temperature pipelines, reserve thermal expansion gaps, and use high-temperature resistant materials for pipeline supports to prevent pipeline deformation or detachment.
   • The site must be equipped with protective gear such as heat-insulating gloves and high-temperature resistant protective clothing. Before touching high-temperature components, operators must confirm the temperature of the components to avoid scalding.
   • Urea dust is prone to moisture absorption and caking, and long-term exposure may irritate the respiratory tract. Ensure good ventilation on-site, and operators must wear dust masks. Spilled urea dust must be cleaned up promptly to prevent slipping hazards.
   • For the installation of auxiliary chemical pipelines (such as ammonia water pipelines), take leak-proof measures. Equip the site with emergency neutralizers (such as dilute hydrochloric acid), eyewash stations and first-aid kits.
4. Safety of Electrical and Hot Work
   • Temporary electrical use at the construction site must follow the principle of “three-level power distribution and two-level protection”. Distribution boxes must be rainproof and dustproof, and the grounding and zero protection system must be reliable. Low-voltage electrical appliances (36V or below) must be used for operations in humid environments.
   • Hot work (such as welding, cutting) requires a hot work permit. Remove flammable materials (such as insulation cotton, oil stains, urea dust) around the work area, and assign fire watchers equipped with fire extinguishers. After hot work is completed, clean the site and confirm that no fire sources remain.
   • Static grounding devices for equipment and pipelines must be installed simultaneously. The grounding resistance must meet specification requirements to prevent fire accidents caused by static electricity accumulation.
5. On-Site Management and Emergency Safety
   • Set up clear safety warning signs on-site (such as “Danger of Falling from Height”, “No Entry”, “Helmet Must Be Worn”), and demarcate work zones, material storage zones and passageways.
   • Operators must correctly wear personal protective equipment such as safety helmets and safety shoes. Working under the influence of alcohol and violating operating procedures are strictly prohibited.
   • Formulate special emergency plans, and organize regular emergency drills for accidents such as falling from height, equipment tipping and fire. Equip the site with emergency supplies including first-aid kits, stretchers and fire extinguishers.
   • Establish a daily safety disclosure system. Conduct full-staff briefings on the day’s work content, risk points and protective measures, and keep detailed records.