Fiberglass oil separator-Fornitore globale

835 Luhe Avenue, Zhucheng City, Shandong Province (100 meters south of the intersection of Xinghua East Road and Industrial Avenue)

Equipment Introduction:
An oil separator is a treatment structure that utilizes the difference in specific gravity between oil and water to separate and remove suspended oil with larger particles from wastewater. The petroleum and petrochemical industries discharge wastewater containing a large amount of oil products during the production process; The coking and gasification industries of coal discharge wastewater containing high concentrations of tar; The wool textile industry and meat industry discharge wastewater containing a high amount of oil and fat. If these oily wastewater are discharged into water bodies, it will cause pollution, and irrigating farmland will block soil pores, which is harmful to crop growth. If oil products in wastewater are recycled and reused, not only can environmental pollution be avoided, but considerable economic benefits can also be obtained.
The specific gravity of oil in wastewater is generally smaller than that of water, and it exists in three states: ① Suspended state: Oil particles are larger, with a diameter of more than 0.1 millimeters, floating on the water surface, and easy to separate from water. In the petroleum industry, these types of oil products account for about 60-80% of the oil content in wastewater Emulsified state: The dispersed particle size of the oil is small, and the diameter of the oil droplets is below 0.1 millimeters, in an emulsified state, which is not easy to float and separate from the water. This type of oil accounts for about 10-15% of the oil content in wastewater Dissolved state: Petroleum has extremely low solubility in water, and the oil soluble in water accounts for 0.2-0.5% of the oil content in wastewater. The oil separation tank is mainly used to separate and remove suspended oil products from wastewater, while emulsified oil products need to be removed by flotation or coagulation sedimentation methods.
Principle.
The basic principle of using oil separators and sedimentation tanks to treat wastewater is the same, both of which use the different specific gravity of suspended solids and water in the wastewater to achieve separation. The structure of oil separation tanks often adopts a laminar flow type. Oil containing wastewater enters the rectangular oil separation tank through a water distribution tank and flows slowly in the horizontal direction. During the flow, the oil product floats on the water surface and is pushed into the oil collection tank by the oil collection pipe or the oil scraper set on the tank surface and flows into the dehydration tank. The heavy oil and other impurities that settle in the oil separation tank accumulate in the sludge hopper at the bottom of the tank and enter the sludge pipe through the discharge pipe. The wastewater that has undergone oil separation treatment overflows into the drainage channel and is discharged outside the pool for subsequent treatment to remove emulsified oil and other pollutants.
Oil separators are often constructed with reinforced concrete or with bricks and stones. They are divided into 2-4 grids along the direction of water flow on a rectangular plane, with each grid generally not exceeding 6 meters in width, to ensure even water distribution. The effective water depth does not exceed 2 meters, and the length of the oil separation tank is generally more than 4 times the width of each compartment. Chain belt oil scraper and mud scraper are commonly used in oil separation tanks to scrape off floating oil and bottom sludge, respectively. Generally, each grid is equipped with a set of oil scraper and mud scraper, and a sludge hopper is set up. If a baffle is added in the middle of each grid, and oil and mud scrapers are installed on both sides of the baffle, and a sludge hopper is installed, it is called a two-stage oil separator (see figure [two-stage oil separator]), which can improve the oil removal efficiency, but with more equipment, energy consumption increases. If several inclined plates are added to the oil separation tank, the oil removal efficiency can also be improved, but the construction investment is relatively high. In cold regions, to prevent oil solidification in winter, a steam pipe can be installed at the bottom of the oil collection pipe for heating. Oil separators generally need to be covered and steam pipes should be placed under the cover plate for insulation, to prevent fires and oil evaporation in the oil separator, and to prevent dust and sand from entering.
Oil separation is a natural floating separation device, and commonly used oil separation tanks include: horizontal flow oil separation tank (API oil separator), parallel plate oil separation tank (PPI oil separator), and inclined plate oil separation tank (CPI oil separator) The oil content in the effluent of the oil separator is generally less than 50 mg/L
compare
Comparison of API, PPI, and CPI Oil Separation Tank Performance
Project API type PPI type CPI type
Oil removal efficiency/% 60~70 70~80 70~80
Occupying an area of 1 1/2 1/3 to 1/4 with the same processing capacity
Minimum droplet diameter that may be removed/μ m 100~150 60 60
Floating velocity of minimum oil droplet/(mm • s-1) 0.9 0.2 0.2
Classification of oil separators
Mainly divided into automatic oil separators and gravity oil separators, but with different placement methods and materials, they are divided into buried fiberglass oil separators. And there are fiberglass oil separators on the ground, as well as stainless steel oil separators.
Design Basis for Oil Separation Tank
1. The oily wastewater from canteens and restaurants should be discharged into the sewage pipeline after passing through the oil removal device.
2. The sewage flow rate should be calculated based on the design second flow rate.
3. The flow velocity of sewage containing edible oil in the pool shall not exceed 0.005m/s.
4. The retention time of wastewater containing edible oil in the pool water is 2-10 minutes.
5. The volume of oil stored in the oil separation tank for manual oil removal shall not be less than 25% of the effective volume of the tank.
6. The oil separation tank should be equipped with a movable cover plate. The inlet pipe should consider the possibility of being clear and unobstructed.
7. The depth from the bottom of the oil separation tank outlet pipe to the bottom of the tank shall not be less than 0.6m.