1. Contact with emergency handling

skin exposure

Rinse the contact area with a lot of running water for at least 15 minutes and remove contaminated clothing; if redness or burning, seek medical treatment.

Inhalate dust

Quickly transfer to fresh air to keep the airway open; if breathing difficulties occur, take oxygen and send to hospital.

Miseating treatment

Immediately gargle the mouth and drink milk or egg white to protect the digestive tract mucosa, prohibit vomiting, need urgent medical treatment.

Leakage disposal

Small leakage: covered with dry sand and collected to closed container; wear rubber protective clothing and gas mask under the guidance of experts.

2. Operating specifications and protection requirements

Preparation and investment

The dissolution concentration is controlled at 1-5% (the weight ratio of solid to water is 1:5) to avoid waste or hydrolysis failure due to high concentration.

Before use, the adding amount should be determined by beaker test. When the turbidity of raw water is 100-500 mg/L, the recommended adding amount is 10-20kg / 1000 tons of sewage.

armor

Dust masks, chemical goggles, rubber gloves and acid and alkali-resistant work clothes should be worn to avoid direct contact.

environmental control

Clean water should be used for dissolution, and oily sewage is prohibited; mixing with strong oxidant and acid and alkali substances is prohibited.

3. Storage management requirements

condition of storage

The environment should be dry and ventilated, and the temperature is controlled at 10-30℃ to avoid direct sunlight and high temperature environment (such as close to heating).

Keep sealed in polyethylene / polypropylene containers and check package integrity regularly to prevent moisture absorption.

Zoning management

Store them separately from inflammable and alkali substances, set up warning marks, and prohibit irrelevant personnel from approaching them.

4. Health and environmental risk prevention and control

Long-term exposure to risk

Long-term exposure may lead to chronic symptoms such as respiratory irritation, headache, and loss of appetite, requiring regular physical examination and shortening the single operation time.

Fire response

PAC may cause accidents when using water. Dry sand or carbon dioxide fire extinguisher should be used when extinguishing the fire. It is strictly prohibited to fight with water.

Waste treatment

Waste PAC should be disposed of according to the standard of hazardous chemicals and prohibited to be discharged into sewers or water to avoid environmental pollution.

5. System and training requirements

safety signs

The material safety technical instructions (MSDS) should be posted in the storage area to clarify the hazard characteristics and first aid measures.

personnel training

Regularly carry out operation norms, emergency drills and protective equipment use training to strengthen safety awareness.

sum up

The safe use of polyaluminum chloride should run through the whole process of storage, preparation, operation and waste, combined with engineering technology control and personal protection, which can effectively reduce risks. It is suggested that enterprises refer to the Regulations on the Safety Management of Dangerous Chemicals and the SDS documents provided by the manufacturer to establish standardized operating procedures.