Method and system for circularly regenerating diatomite filter aid containing oil waste

Abstract

The invention belongs to the technical field of diatomite regeneration and provides a system for circularly regenerating a diatomite filter aid containing oil waste. The system comprises a regenerator, wherein the regenerator is connected with a dephlegmation device and an electric roasting rotary kiln; the dephlegmation device is connected with a condenser; the electric roasting rotary kiln is connected with a sorting device and comprises a frame body and a kiln cylinder rotationally arranged on the frame body; an electric stove wire and a heat preserving furnace shell are sequentially arranged outside the kiln cylinder; a loop cutting device is arranged in the kiln cylinder and comprises a long bar-shaped rod body; and the cross section of the rod body is a trilateral cross section formed by enclosure of three arcs which are sunken inwards. The invention also provides a method for circularly regenerating the diatomite filter aid containing the oil waste. The method comprises the following steps of desorption regeneration, regenerated diatomite roasting and sizing crushing. The problems that a diatomite regeneration process is complex, requirement on equipment is relatively high, process is complex because of separation, and quality of an oil product obtained through desorption is relatively low in the prior art are solved.

Description

Technical field [0001] The invention belongs to the technical field of diatomite regeneration, and relates to a method and system for recycling oily waste diatomite filter aid. Background technique [0002] In the process of cold rolling and foil rolling in the aluminum processing industry, a certain amount of friction is generated between the roll and the rolled piece, which will leave a small amount of aluminum swarf, dust and other tiny particles in the rolling oil that it uses. The rolling oil needs to be regular Use diatomaceous earth for filtration and purification. When the diatomaceous earth is saturated, the sludge will block the micropores and affect the filtration efficiency. Therefore, it needs to be replaced. The replaced oily diatomaceous earth needs to be disposed of as a hazardous waste. [0003] In the prior art, the representative waste diatomite treatment technology "sulfuric acid-filtration refining technology", "solvent replacement filtration refining technolog...

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Problems solved by technology

[0002] In the process of cold rolling and foil rolling in the aluminum processing industry, there will be a certain amount of friction between the roll and the rolled piece, which will leave a small amount of aluminum chips, dust and other tiny particles in the rolling oil used. The rolling oil needs to be regularly Diatomaceous earth is used for filtration and purification. When the diatomite is saturated, the oil sludge will block the micropores and affect the filtration efficiency. Therefore, it needs to be replaced. The replaced oily diatomite needs to be disposed of as a hazardous waste.

[0003] In the existing technology, the representative waste diatomite treatment technologies are "sulfuric acid-filtration refining technology", "solvent displacement filtration refining technology", "solvent displacement-distillation refining technology", among which "sulfuric acid-filtration refining technology" will Diatomite is added to the dilute sulfuric acid solution to extract the oil, realize oil-soil separation, and then carry out acid-base neutralization of the extracted oil. Diatomite is used as paving material or directly landfilled, dilute sulfuric acid wastewater is recycled or Sewage treatment, this process technology uses a large amount of acid and alkali chemicals, consumes a large amount of water, cannot effectively recycle diatomite, and is not economical and environmentally friendly. Moreover, diatomite also contains 40% to 50% of dilute sulfuric acid, which will It causes serious pollution to the environment. Even if it is treated with sodium hydroxide, it still contains more than 4% oil, which is a hazardous waste and has great harm; "solvent replacement-distillation refining technology" is to add oil-containing diatomite to extract In the organic solvent, the oil is extracted to realize the separation of oil and soil, and then the extracted liquid phase is distilled and separated to recover the extractant and product oil, and the diatomite containing the extraction solvent is subjected to a further step of thermal separation. Long, the extraction agent is introduced in the separation process, which complicates the process, requires high equipment and the separation complicates the process, requires high equipment and low separation efficiency

In the prior art, there is an electromagnetic heating regenerator to desorb and regenerate oil-containing diatomite, but the desorbed oil is not processed, and the quality is poor, and it still needs to be processed before it can be sold as a product

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