A method for separating oil and water residue in the waste oil refining process
A technology of refining process and separation method, which is applied in the field of waste recycling, can solve problems such as harsh working environment, lower oil yield, cross-flow of sewage, etc., achieve the effect of realizing automatic operation, reducing the escape of peculiar smell, and improving the working environment
Inactive Publication Date: 2016-02-10
JIAXING LYUNENG ENVIRONMENTAL PROTECTION SCI & TECH CO LTD +1
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Problems solved by technology
[0006] Since the vertical press cannot be sealed, the sewage flows cross-flow during the pressing process, the smell is sour, and the working environment is harsh. What is more worthy of attention is that the dry porous sawdust absorbs a part of the oil, which is difficult to peel off and recover. resulting in a decrease in oil yield
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Embodiment 1
[0019] See figure 1 . Release the oil and water residue in the middle and lower layers of the settling separation tank 1, and enter the vertical bottom discharge centrifuge 2. The rotating speed of the centrifuge drum is above 200rpm. A filter cake is quickly formed on the cloth, and the thickness of the filter cake is 5-10 mm. Continue discharging, and when the thickness of the filter cake reaches 100mm, stop discharging, keep the rotating speed at 1000rpm for 5 minutes, and collect the oil-water mixture thrown out by the centrifuge into the intermediate storage tank 3 for temporary storage. Start the mechanical scraper to scrape the filter cake out of the centrifuge to realize the unloading operation. Keep a layer of filter cake with a thickness of 5-10mm on the filter, continue to discharge, and perform the second centrifugal separation operation. After calculation, the separated solid residue accounts for 10% of the total weight of oil and water residue.
[0020] The ...
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The invention designs a method for separating oil and water residues in the waste oil refining process. The technical problem to be solved is to remove solid and ionic metal impurities in waste oil products. The separation method of the oil-water slag of the present invention is characterized in that the oil-water slag from the settling separation tank (1) enters the vertical bottom discharge centrifuge (2), and under the action of centrifugal force, the solid slag is deposited on the inner wall of the drum to form a filter The active filter cake and the oil-water mixture pass through the micropores of the filter cake and the filter bag to achieve liquid-solid separation, and the liquid-phase oil-water mixture and solid residue are obtained. The mechanical scraper of the centrifuge scrapes the filter cake and discharges the solid residue and oil-water mixture. Metal impurities are removed through the intermediate storage tank (3) and then transported to the hydrocyclone (5) by the liquid delivery pump (4) for high-speed cyclone separation to obtain oil phase products and water.
Description
technical field [0001] The invention discloses a method for separating oil and water residues in the waste oil refining process, and belongs to the field of waste recycling. Background technique [0002] Statistics show that my country's annual total oil consumption is about 22.5 million tons, and catering oil exceeds 6 million to 8 million tons. Most of the waste oil is discharged into the river from the sewer, which will cause the nutrient of the water body, seriously pollute the ecological environment and destroy the natural ecological system. Part of the waste oil was simply refined and processed by lawbreakers, and then flowed into the market and returned to the dining tables of ordinary people. According to the estimates of relevant persons, at present, 2 to 3 million tons of waste oil are returned to the dining table in my country every year, accounting for 1 / 10 of the total annual consumption. Old frying oil, one of the gutter oils, has been in contact with oxygen ...
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IPC IPC(8): B01D36/04B03C1/30
Inventor 胡万鹏万新伟
Owner JIAXING LYUNENG ENVIRONMENTAL PROTECTION SCI & TECH CO LTD