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Cleaning method of waste plastics

A technology for waste plastics and waste plastics, applied in plastic recycling, mechanical material recycling, recycling technology, etc., can solve the problems of water pollution, consumption of acid and alkali substances, low cleaning efficiency, etc., to reduce environmental pollution, improve use level, Good cleaning effect

Inactive Publication Date: 2019-01-25
柳州科沃塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The waste plastic articles used in daily use are very good renewable resources. Before the waste plastic articles are recycled, the impurities attached to the surface need to be cleaned. The current cleaning method for waste plastic articles is: first use chemical solvents or acid-base to clean, Rinse with a large amount of clear water, and then crush and granulate waste plastic articles for recycling; the existing cleaning methods for waste plastic articles need to consume acid and alkali substances and a large amount of water. Although waste plastics are recycled, they also bring A large amount of water pollution, and this traditional cleaning method of waste plastic items requires a large cleaning workload, and it is difficult to clean the dead corners in plastic containers, which affects the level of recycling of waste plastics; in addition, existing biological cleaning methods exist Defects of low cleaning efficiency and poor cleaning effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The cleaning method of the waste plastics that present embodiment provides, concrete steps are as follows:

[0021] A. Crushing: Use a pulverizer to cut and pulverize waste plastic products into plastic particles with a particle size of 1.2 cm;

[0022] B. Rinse: Put the plastic particles into the grit chamber with clear water and stir them, and use the water to wash away the plastic particles to separate the inorganic impurities attached to the plastic particles from the plastic particles;

[0023] C. Bio-fermentation adsorption: Put the mixed solution of Pleurotus ostreatus mycelium and nutrient solution in the closed tank, and the fermentation temperature is 20°C. After the Pleurotus ostreatus mycelium completely wraps the plastic particles, take out the plastic particles;

[0024] D. Activated sludge cleaning: Put plastic particles into the aeration tank and soak for 6 hours. The aeration tank is provided with water and sludge containing aerobic microorganisms;

[...

Embodiment 2

[0032] The cleaning method of the waste plastics that present embodiment provides, concrete steps are as follows:

[0033] A. Crushing: use a pulverizer to cut and pulverize waste plastic products into plastic particles with a particle size of 0.8 cm;

[0034] B. Rinse: Put the plastic particles into the grit chamber with clear water and stir them, and use the water to wash away the plastic particles to separate the inorganic impurities attached to the plastic particles from the plastic particles;

[0035] C. Bio-fermentation adsorption: Put the mixed solution of Pleurotus ostreatus mycelium and nutrient solution in the closed tank, and the fermentation temperature is 25°C. After the Pleurotus ostreatus mycelium completely wraps the plastic particles, take out the plastic particles;

[0036] D. Activated sludge cleaning: Put plastic particles into the aeration tank and soak for 8 hours. The aeration tank is provided with water and sludge containing aerobic microorganisms;

[...

Embodiment 3

[0044] A cleaning method for waste plastics, the specific steps are as follows:

[0045] A. Crushing: use a pulverizer to cut and pulverize waste plastic products into plastic particles with a particle size of 1.1 cm;

[0046] B. Rinsing: Put the plastic particles into the grit chamber with clear water and stir them, and use the water to wash away the plastic particles to separate the inorganic impurities attached to the plastic particles from the plastic particles;

[0047] C. Bio-fermentation adsorption: Put the mixed solution of Pleurotus ostreatus mycelium and nutrient solution in the closed tank, and the fermentation temperature is 23°C. After the Pleurotus ostreatus mycelium completely wraps the plastic particles, take out the plastic particles;

[0048] D. Activated sludge cleaning: Put plastic particles into the aeration tank and soak for 7 hours. The aeration tank is provided with water and sludge containing aerobic microorganisms;

[0049] E. Stirring: Put the plast...

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Abstract

The invention aims to provide a cleaning method of waste plastics. The cleaning method specifically comprises the following steps of A, crushing: enabling a crushing machine to shear and crush waste plastic products into plastic particles; B, flushing: feeding the plastic particles into a sand precipitating tank loaded with clean water, and stirring; C, biological fermenting and adsorption: putting a mixed solution of oyster mushroom hyphae and nutritional liquid into a sealed tank; D, cleaning of activated sludge: feeding the plastic particles into an aeration tank; E, stirring: feeding the plastic particles into a stirring tank loaded with a water body, and fully stirring; F, soaking in an acid liquid: soaking the plastic particles into an acid liquid tank for 1 to 2 hours; G, soaking inan alkaline liquid: soaking the plastic particles into an alkaline liquid tank for 1 to 2 hours, and adding crushed cactus and aloe into the alkaline liquid tank; H, cleaning and dewatering: flatly paving the plastic particles onto a net plate, rinsing by clean water, filtering, and dewatering, so as to obtain the cleaned plastic particles. The cleaning method overcomes the defects of the prior art and has the characteristics of high cleaning efficiency and good cleaning effect.

Description

technical field [0001] The invention relates to the field of plastic treatment, in particular to a method for cleaning waste plastics. Background technique [0002] The waste plastic articles used in daily life are very good renewable resources. Before the waste plastic articles are recycled, the impurities attached to the surface need to be cleaned. The current cleaning method for waste plastic articles is: first use chemical solvents or acid-base to clean, Rinse with a large amount of clear water, and then crush and granulate the waste plastic articles for recycling; the existing cleaning methods for waste plastic articles need to consume acid and alkali substances and a large amount of water. Although waste plastics are recycled, they also bring A large amount of water pollution, and this traditional cleaning method of waste plastic items requires a large cleaning workload, and it is difficult to clean the dead corners in plastic containers, which affects the level of rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B17/04
CPCB29B17/00B29B17/0412B29B2017/0015Y02W30/52Y02W30/62
Inventor 薛双全王启亮郑兆松
Owner 柳州科沃塑业有限公司