Speaking of grease trap, I'm afraid many people don't know much about it, because such objects are rarely used in our lives, but some people want to make grease traps, but some institutions don't understand its principle and composition, and the effect is not good if they don't understand it. What is the principle of grease trap? Speaking of grease trap, I'm afraid many people don't know much about it, because such objects are rarely used in our lives, but some people want to make a grease trap, but some institutions don't understand its principle and composition. If they don't understand, the effect will be bad and even affect the use. Therefore, they want to know more about the grease trap. So let me introduce the structure of the grease trap? What is the principle of grease trap?

Oil separation tank structure

Most grease traps are made of reinforced concrete or masonry. On the rectangular plane, it is divided into 2 ~ 4 grids along the direction of water flow, and the width of each grid is generally less than 6 meters, so as to evenly distribute water. The effective water depth is less than 2 meters, and the length of the oil separation tank is generally more than 4 times the width of each tank. Oil slick and sludge at the bottom of the oil separation tank are scraped off by chain scraper and sludge scraper respectively. Generally, each grid is equipped with a set of oil scraper and mud scraper and a mud bucket.

If a baffle is added in the middle of each compartment, oil scraper and mud scraper are installed on both sides of the baffle, and mud hopper is installed, which is called two-stage oil separation tank, the oil removal efficiency can be improved, but the equipment and energy consumption increase. If several inclined plates are added to the oil separation tank, the oil removal efficiency can also be improved, but the construction investment is high. In cold areas, in order to prevent oil from freezing in winter, steam pipes can be installed at the bottom of oil collecting pipes for heating. Generally, the grease trap should be covered with a steam pipe under the cover plate, which can keep warm, prevent the grease trap from catching fire and oil products from volatilizing, and prevent dust and sand from entering.

Oil separation tank principle

The grease trap is divided into two gears and three compartments. Oily sewage enters the grille from the water inlet of the equipment, and the sundries in the grille are separated by the sundries basket. The oily sewage without sundries enters the second compartment, which has a large space and meets the design requirements of the oil separation tank. Using the specific gravity difference between oil and water, the oil and water are fully separated by natural floating, and the separated sewage enters the third compartment and is discharged through the water outlet pipe. The separated oil is manually removed in the second oil tank or discharged into the oil tank through an oil pump.

Its internal structure highlights the function of oil-water separation: by increasing the cross-sectional area of water, the flow (? 0.005 m/s to increase the hydraulic retention time of wastewater (especially in the oil-water separator room); The aeration system further separates oil and water by air flotation, which greatly improves the effect of oil-water separation. The structure of the outlet area also fully considers the uniformity of water flow and measures such as deodorization and siphon prevention; Type ⅲ is a small grease trap, which is mainly used under the sink of kitchen and restaurant. It is directly connected to the drainage pipe and is generally located on the ground. Its structure is basically the same as that of type ⅰ, ⅱ and ⅳ.

The principle of oil separation tank is to use the different specific gravity of suspended solids and water in wastewater to achieve the purpose of separation. The structure of grease trap mostly adopts advection. Oily wastewater enters the rectangular oil separation tank through the water distribution tank and flows slowly along the horizontal direction. During the flowing process, the oil product floats to the water surface, is pushed into the oil collecting pipe by the oil collecting pipe or the oil scraper installed on the tank surface, and flows into the dehydration tank. Heavy oil and other impurities precipitated in the oil separation tank gather in the sludge hopper at the bottom of the tank and enter the sludge pipe through the sludge discharge pipe. After oil separation, the wastewater overflows to the drainage tank for subsequent treatment to remove emulsified oil and other pollutants.

The above is the structure of the grease trap I introduced? What is the principle of grease trap? We have some knowledge about the grease trap, and we know that it is very simple to stay away from it. Now many families are also building grease traps, but it is difficult to build them because they don't understand them, so we must know more about them before we can build a more practical grease trap.