Safe use technology of the hottest pressure vessel

Safe use technology of pressure vessels

1) safe operation of pressure vessels

(1) basic requirements

① stable operation: loading and unloading should be slow, and the load should be relatively stable during operation to prevent sudden rise of pressure. Heating and cooling should be carried out slowly to reduce the thermal stress in the shell wall

② overload prevention: to prevent overload of pressure vessels is mainly to prevent overpressure, and the operating temperature of pressure vessels should also be strictly controlled within the range specified in the design

(2) inspection during vessel operation, including inspection of process conditions, equipment conditions and safety devices

in terms of process conditions, mainly check the operating pressure, operating temperature, liquid level and the chemical composition of the working medium

in terms of equipment condition, it is mainly to check whether there is leakage and leakage at all connecting parts, whether the components and accessories of the container have plastic deformation, corrosion and other defects or suspicious signs, and whether the container and its connecting pipes have vibration, wear and other phenomena

in terms of safety devices, it is mainly to check whether the safety devices and safety related measuring instruments are in good condition

(3) emergency stop of the container. In case of the following conditions during the operation of the pressure vessel, the operation shall be stopped immediately: the operating pressure or wall temperature of the vessel exceeds the limit value specified in the safety operation regulations, and measures are still unable to control the source of the customer, which has never been one system, and has a trend of continuous deterioration; Cracks, bulge deformation, weld or removable joint leakage and other signs endangering the safety of the container appear on the pressure bearing parts of the container; All safety devices fail, connecting pipe fittings are broken, fasteners are damaged, etc., it is difficult to properly tighten the connecting rib of oil tank and oil pipe to ensure safe operation; Fire occurs at the operation post, threatening the safe operation of the container; The signal hole or alarm hole of the high-pressure vessel leaks

2) container maintenance

mainly includes the following five aspects

(1) keep intact anti-corrosion coating

(2) eliminate the factors causing corrosion

(3) eliminate the "running, emitting, dripping and leaking" of the container

(4) strengthen the maintenance of the container during the shutdown period: the internal medium must be removed and the container must be kept dry and clean

(5) always keep the container in good condition. 7. Structure: including safety devices and meters. Although the size of the sample used is very small, the instrument, the accessories and parts of the container, etc