Oil-water separation process of pulpifying centrifugal treatment system

Abstract

The invention discloses an oil-water separation process of a pulpifying centrifugal treatment system. The pulpifying centrifugal treatment system comprises a pulp beater, a sand settling device, a horizontal centrifuge, a heater, a vertical centrifuge and a pulp tank. The oil-water separation process comprises the steps as follows: a preparation step, a primary heating step, a primary centrifugation step, a secondary heating step, a secondary centrifugation step and a hydration and pulp-beating step. Hydrated beaten pulp continuously and mutually collides with wear-resistant material in the equipment at a high speed and is ground into thickened pulp material, so that the digestion rate of a back-section anaerobic fermentation system and the biogas yield are increased; a secondary centrifugation step is added, so that the design flow of the oil-water separation process is reasonable, the next step vertical centrifugation effect is facilitated, and the outlet oil concentration and the operation efficiency are increased; a good centrifugal oil outlet effect is achieved, and the water content of obtained thick oil and the oil content of wastewater material are low; and the back-section anaerobic fermentation efficiency is improved, oil-water separation of the material is conducted more thoroughly and re-consumption of energy is avoided.

Description

technical field [0001] The invention relates to the technical field of oily water treatment in solid waste, in particular to an oily water separation process of a slurry centrifugal treatment system. Background technique [0002] Food waste mainly refers to food waste produced by households, canteens, catering industries, etc., commonly known as swill, which is an important part of urban garbage; in view of our country's diet, the amount of food waste is huge; because food waste contains many organic matter Once the food waste rots and deteriorates, the harm it will cause is immeasurable. The main components of kitchen waste include rice and flour food residues, vegetables, animal and vegetable oils, meat, bones, etc. In terms of chemical composition, they include starch, cellulose, protein, lipids, and inorganic salts. Kitchen waste is characterized by rich organic matter content, high moisture content, and perishability. If it is not disposed of in a timely and reasonable...

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Problems solved by technology

[0004] In the prior art, as the patent No. is CN201120139561.1 Chinese invention application patent "kitchen waste oil-water separation treatment method" (announcement number is CN202038949U); The first steam heater, three-phase horizontal centrifuge, oil separation pool, second steam heater, vertical centrifuge, waste material storage filter, sedimentation tank, conical recovery container with a tip at the lower end, membrane bioreaction pool and oil-water separation tank for oil-water separation treatment; this technology uses secondary centrifugal method for oil-water separation, the temperature interval between the two is relatively large, and the oil-water separation is not complete, even if there is a lot of oil, it will be easily flowed away, which is not conducive to Improve the recovery rate; some liquid and solid materials produced during the oil-water separation process do not involve corresponding follow-up treatment measures

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