Impurity-removing and oil-dissolving machine, and kitchen waste grease treatment system and method

Abstract

The invention relates to an impurity-removing and oil-dissolving machine, and a kitchen waste grease treatment system and method. The impurity-removing and oil-dissolving machine comprises a front filtering device, a residue fishing and heating device and a residue discharging device, wherein the front filtering device is used for roughly filtering kitchen waste grease; the residue fishing and heating device is used for heating and demulsifying feed liquid after rough filtering and fishing-out of solid residues; the front filtering device comprises a feeding box and a coarse filtering net belt arranged in the feeding box, and one end of the coarse filtering net belt capable of circularly operating corresponds to a residue discharging shell at a lower part; the residue fishing and heating device comprises a main box body, a heating mechanism and a residue fishing mechanism, the residue fishing mechanism comprises a residue fishing main shaft, two residue fishing chains and a plurality of scraping plates capable of circularly operating, and one end of a mesh plate positioned at the lower part of the high-position residue fishing chain corresponds to the residue discharging shell at the lower part; and the residue discharging device comprises a residue discharging driving mechanism, the residue discharging shell and a residue discharging auger. The impurity-removing and oil-dissolving machine has the characteristics of reliable system operation, low equipment failure rate, high oil extraction rate, low loss of organic matters, resource utilization and high added value of products.

Description

technical field [0001] The invention relates to an impurity-removing oil-dissolving machine, a kitchen waste oil treatment system and a method, and belongs to the technical field of kitchen waste edible oil treatment. Background technique [0002] Kitchen waste cooking oil is commonly known as gutter oil, swill oil, and swill oil. It is produced in a huge amount, mainly referring to the waste oil accumulated in the oil-water separator and grease trap of restaurants or food production units. Waste cooking oil from the kitchen is usually mixed with a large amount of sewage and floating solid debris, and the oil content is usually in the range of 30-50%. Due to the chemical action of the waste edible oils and fats in the kitchen, the original fatty acids and vitamins are destroyed, and pollutants such as benzene, hexanal, and ketones continue to accumulate, so they are no longer suitable for food processing. Disposal of kitchen waste cooking oil is usually pretreated by deslag...

AI Technical Summary

Problems solved by technology

[0004] (1) At present, the pretreatment of kitchen waste cooking oil mainly adopts high-temperature static separation or filtration to separate debris, but there are problems such as long static separation time, easy blockage of filter membrane, and serious oil loss, and the oil extraction rate is ≤90%. , the impurity rate of oil is ≥ 5%, which affects the separation effect of impurities and the extraction rate of oil, so it is not easy to improve the quality of oil

[0005] (2) Light debris such as plastics and fibers in waste edible oils from the kitchen can easily block the oil outlet and water outlet, increasing the frequency and wear of equipment disassembly, cleaning, dredging, etc., and the cost of cleaning and maintenance is high, and it will also affect Crude oil purity after production and extraction

The patent has the following problems: 1) The heating kettle is heated by a high-temperature steam jacket, and the high-temperature and high-pressure steam is used in the settling tank and the heating kettle to pressurize the sand cylinder and the sand discharge pipe to blow the sand-water mixture into the sand washing device , so the equipment consumes a lot of energy and the operating cost is high

2) After the waste oil is extracted in two stages, the heavy sand and light scum are removed by the impurity remover, settling kettle and sand washing device before the three-phase separation. The crude oil separated by the three-phase still needs to be removed Miscellaneous can meet the quality requirements, so the overall treatment system is more complicated, and the three-phase effluent needs to use oil separator to reduce the oil content, so as to ensure the stability of the anaerobic system, the process is quite complicated

This patent has the following problems: 1) Wood shavings need to be added during the treatment, which increases the cost of consumables, and the small shavings in the press filter pass through the filter holes, which will affect the quality of oil

2) The shavings inevitably absorb part of the oil, resulting in the loss of oil. Although it can be used as a raw material for the preparation of biomass briquettes, on the one hand, the oil extraction rate is reduced, and on the other hand, the process of preparing raw materials is lengthened

3) The volume of each filter belt of the vertical hydraulic press is 25L, the processing capacity is limited, and it needs to be cleaned and replaced frequently

4) The effect of water and oil separation is not clear

However, during the drum grid separation process, it is easy to cause blockage of the sieve holes, which affects the separation effect of oil, water and slag. Not only is the treatment system more complicated, but also the maintenance cost is high, which will affect the purity of crude oil after production and extraction.

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