Petroleum refining enterprises of low-temperature thermal water often due to refining device heat exchanger leakage and lead to the water contains a considerable amount of oil substances, dispersed in the water oil will be mixed with other suspended matter contained in the water, more likely to be in the refining device heat exchanger wall deposition of the formation of difficult to remove the sludge scale, a serious impact on the refining device heat exchanger heat transfer efficiency, greatly reduces the efficiency of the energy, the situation is serious and even will occur! Pipe blockage; low-temperature heat circulation water system in the deposition of oil will also bring unpredictable difficulties and dangers to the system equipment, pipeline maintenance (electricity, gas welding caused by fire or even explosion). In order to improve the water quality by using a large amount of fresh water for replacement will cause a great waste of water resources, and at the same time produce a large amount of oily sewage. Traditional filtration methods (such as sand filtration, fiber filtration, etc.) are difficult to adapt to the purification of oily water, and often fail due to contamination of the filter media by oil sludge.
Process Principle
Leakage to the low-temperature thermal recycling water oil in the process of water circulation flow, there is often a serious emulsification phenomenon, in addition, low-temperature thermal recycling water contains a certain amount of suspended impurities, these suspended impurities will be adsorbed with the oil in the water to form a viscous oil sludge, so in order to effectively solve the low-temperature thermal recycling water bypass filtration de-oiling purification problems, it is necessary to solve the problem of sludge agglomerates and the separation of emulsified oil.
Bidun HY series of low-temperature thermal circulating water bypass filtration oil purification system device (utility model patent No.: 2018210472303) adopts the “pre-barrier filtration + interception of oil removal” process route, the system first adopts a high surface adsorption capacity of the porous ceramic sand filtration removal of suspended impurities in the water and the majority of emulsified oil in the water coarse granularity. Most of the emulsified oil in the water is coarsely granulated, and then the oil in the water is removed by a new type of high-efficiency interception and oil removal device, so as to realize effective oil removal and decontamination purification of low-temperature thermal circulating water and to maintain good water quality of low-temperature thermal circulating water in a long-term and stable manner. The system device can be well adapted to and efficiently purify the oil-containing low-temperature thermal recycling water, greatly improve the water quality of the oil-contaminated low-temperature thermal recycling water, and get considerable benefits of water saving (greatly reduce the amount of fresh water for replacement) and energy saving (improve the efficiency of heat exchanger and heat exchange terminal).
HY150DR-X-II oil removal and purification system main technical indicators
Inlet water quality conditions:
Oil content: ≤200mg/l, oil content in case of accident ≤500mg/l (not more than 6 hours)
Suspended matter content: average ≤10mg/l, maximum value ≤50mg/l;
PH value: 6～9;
Water quality of water discharged from the device:
Oil content: ≤2mg/l after 24 hours of normal system operation, ≤5mg/l in case of accident.
Accident ≤5mg/l; suspended solids content ≤5mg/L.
System self-consumption rate of 1%
In the case of bypass filtration, the quality of incoming water meets the relevant incoming water conditions.
In the case of the bypass filter water quality in line with the relevant water conditions, the effective service life of the oil-blocking and oil-removing materials is
Not less than 18 months.
