Failure Analysis of Chemical Refrigeration and Heating Cycle Integrated Machine

The industry where the chemical refrigeration and heating cycle integrated machine is used more is the use of the reaction kettle in the laboratory, and the use of plate exchangers to improve the heat utilization rate of the system and achieve the effect of rapid heating and cooling
.


Therefore, everyone needs to pay attention to the following problems when installing the integrated chemical refrigeration and heating cycle machine to avoid some installation failures
.

1.
There is leakage at the sealing surface: Cause of failure: The screw thread is loose and the sealing surface is damaged
.

Removal method Re-tighten the screw of the refrigeration heating temperature control system with the reactor; re-grind and polish the sealing surface
.

2.
There is leakage at the valve: Cause of failure: The valve stem (needle) and the sealing surface of the valve port are damaged
.

Remedy Repair, replace the valve stem (needle) and valve port
.

　　3.
The outer magnetic steel rotates, the inner magnetic steel does not rotate, and the motor current decreases: Cause of failure: The temperature rise in the kettle with the integrated chemical refrigeration and heating cycle machine is too high, the cooling cycle is not smooth, and the inner magnetic steel is demagnetized due to high temperature
.

Hydrogenation reaction, the inner magnetic steel sleeve has cracks, and the inner magnetic steel expands
.

Remedy notify the supplier and replace the inner magnet
.

　　4.
There is friction noise in the magnetic coupling drive: Causes of failure: The shaft sleeve and bearing are worn, the gap is too large, and the inner magnetic steel rotates and jumps
.

Remedy Contact the manufacturer to replace the bearing and bushing
.

　　The chemical refrigeration and heating cycle integrated machine adopts a fully closed pipeline design and a plate heat exchanger, which reduces the demand for heat transfer fluid and improves the heat utilization rate of the system to achieve rapid temperature rise and fall
.

The heat transfer medium is in a closed system with an expansion vessel.
The heat transfer medium in the expansion vessel does not participate in the circulation.
No matter it is high temperature or low temperature, the temperature of the expansion tank is from normal temperature to 60 degrees, which can reduce the absorption of moisture and volatilization of the heat transfer medium during operation.
risk
.

The chemical refrigeration and heating cycle integrated machine has self-diagnosis function, overload electrical appliances, thermal protection devices, sensor fault protection, phase sequence and phase failure protectors, leakage protectors and other protection functions