Oil field contaminated water filtration apparatus

The utility model provides an oil field contaminated water filtration apparatus, including the filtration jar, the filtration jar is personally experienced sth. Part of the body including the jar, is equipped with the filter material layer during the jar is personally experienced sth. Part of the body, the jar body in on the filter material layer below correspond and be equipped with that the water structure is led to to going up of when being used for when filtering input sewage, backwash discharge backwash water and when being used for discharging drainage, backwash when the filtering lower logical water structure of input backwash water, two lead to water structures respectively including lead to the water water -locator and with lead to water water -locator intercommunication a plurality of around the logical water sieve pipes that lead to water water -locator circumference equipartition, the logical water water -locators of two logical water structures feed through respectively to have and extend the external water service pipe of jar. The play surface of water that leads to the water structure down is long -pending big, can increase the area of contact of backwash water and filter material, improves the backwash effect to the filter material. No matter when being sewage or backwash water, rivers cushions in leading to the water water -locator and keep in, the contact time of extension rivers and filter material, and the improvement is to the filter effect of sewage with to the backwash effect of filter material.