Fluid recycling in quenching processAbout the process and the fluids:
The process liquids in the quenching process are of the following nature:
- Washing liquid at upstream of heating oven and subsequently to the quenching oil bath. This washing liquid is contaminated by the dirt washed off from the parts. The contaminations are solid particles and in some cases tram oil.
- Quenching oil that becomes contaminated by metal oxides and other particles that release from the parts in the oil bath.
- Washing liquid at downstream of quenching oil bath and upstream of annealing oven. The parts must be free from oil on the surfaces before entering the oven. Oily parts in the annealing oven cause stain on the surfaces of the product.The oil losses in the 3:rd process stage are quite substantial, in particular for parts of small dimensions, e.g. spring and clips. The quantity of the lost oil can be hundreds of litres per day. Hence, there is reason for purifying the waste oil from the separator in which washing liquid is separated from the quenching oil. The cost saving from recycling quenching oil are; reduced consumption, waste disposals, and maintenance.
Working principle of liquid purifier:
Vivex system for recycling of quenching oil consists of one lamella separator; "Concentrator" in which washing liquid upstream of the annealing oven is separated from oil, and another lamella separator; "Purifier" in which waste oil from the concentrator is purified from water. The purified oil from the recyling module is sent to the quenching oil bath, and the purified washing liquid to the washing machine. The recyling module operates automatically including the cleaning of the lamella packages.
- Purification of washing liquids: Stationary Penguin (VXKN-A)
- Separation of solid particles in the quenching oil bath: Stationary Penguin (VXKN-A)
- Separation in Purifier for the effluent oil out of Concentrator, the washing liquid separator: (VXPU-A)
- Recyling module that includes Concentrator and Purifier in one module: (VXKN/PU)