1、 Pre operation safety check

1. Equipment status verification

Inspection of kettle body/lid: Confirm that there are no cracks, deformations, or corrosion marks, and that the lining has not fallen off; The sealing surface should be smooth and flat, without scratches. ‌

Calibration of safety accessories: Pressure gauges and thermometers must be within the calibration period, and the set pressure of safety valves/rupture discs should be ≤ 1.1 times the rated pressure. ‌

Mixing system test: Start the mixing motor without load, confirm that there is no jamming or abnormal noise, and that the gap between the mixing blade and the kettle wall is uniform. ‌

2. Material and environmental adaptation

Avoid contact with oxidants: Titanium reacting with oxidants at high temperatures may cause combustion or explosion. ‌

Media compatibility: It is prohibited to handle hydrofluoric acid and concentrated alkali solution to prevent corrosion of titanium materials; The concentration of chloride ion solution should be controlled to be ≤ 200ppm. ‌2、 Key control items during operation

1. Temperature and pressure management

Strictly implement temperature gradient: heating rate ≤ 30 ° C/h, avoid rapid cooling during cooling to prevent thermal stress cracking. ‌

Pressure monitoring: The working pressure should not exceed the upper limit indicated on the nameplate. In case of overpressure, the vent valve should be immediately opened to release the pressure. ‌

Prohibit overloading: Material filling amount ≤ 75% of volume, reserve gas phase space for buffering. ‌

2. Mechanical protection and operation specifications

Anti collision protection: Handle the kettle lid gently and tighten the main nut diagonally and symmetrically; Avoid scratching the surface of titanium with hard objects. ‌

Mixing safety: The feeding liquid level must be submerged in the mixing blade before starting, and idling is prohibited; Immediately stop feeding and cool down during power outage. ‌

Hot work restrictions: Welding and cutting operations are strictly prohibited around the kettle during operation. ‌

3、 Key points for corrosion protection and maintenance

1. Weld seam and gap protection

Prioritize using welding instead of bolt connections, with a blunt edge gap of ≤ 0.5mm for butt joints; regularly inspect the weld area and promptly repair the coating if corrosion is found. ‌

Eliminate stagnant areas: Optimize internal structure to avoid dead corners and stagnant flow in the solution. ‌

2. Prevention of galvanic corrosion

When titanium comes into contact with steel components, it is necessary to use PTFE gaskets for isolation or a titanium palladium alloy transition layer. ‌

Medium flow rate control: The linear velocity of corrosive fluid is ρ v ² ≤ 740kg/(m · s ²), and if the flow rate is too high, an anti-collision plate should be added. ‌

3. Regular maintenance

Thoroughly clean after each use: rinse organic residues with ethanol, and neutralize acidic residues with alkali; Long term disuse requires the inner wall to be coated with anti rust oil. ‌

Seal replacement: Fluororubber/O-ring should be replaced every 50 uses or if hardening is found to prevent sudden leaks. ‌

4、 Emergency response measures

Overtemperature and overpressure: ① Close the heating valve → ② Open the cooling water → ③ Open the air valve to release pressure → ④ If ineffective, discharge the waste material at the bottom;

Toxic/flammable leakage: ① Evacuate personnel to the upper air outlet → ② Wear positive pressure respirators and close valves → ③ Spray absorbent to dilute when unable to close;

The kettle body catches fire: ① Cover with asbestos cloth to extinguish the fire → ② Remove the surrounding hydrogen cylinders → ③ Replace and depressurize with nitrogen gas;

Personnel burns/poisoning: Skin contact: Rinse with running water for 15 minutes; Inhalation poisoning: Move to a ventilated area for artificial respiration and seek medical attention immediately.