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Combined method for treating kitchen waste and waste plastics to prepare hydrogen-rich fuel gas

A technology for kitchen waste and waste plastics, applied in the manufacture of combustible gas, granular/powder fuel gasification, fuel and other directions, can solve problems such as plastic waste disposal problems, achieve efficient treatment, reduce secondary pollution, and high hydrogen concentration Effect

Inactive Publication Date: 2020-01-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps dispose of both recyclable materials like paper or rubber products that are used for making items such as furniture or clothing instead of disposing them separately after use. It also produces synthetic gases with very low levels of impurities (hydrocarbons) which help reduce environmental concerns associated with their production processes.

Problems solved by technology

This patented technical solution involves combining two different materials: one being used alone or together into larger units called primary material (P) while another containing valuable components like metal elements such as iron, copper, zinc, manganese, chromium, lead, selenium, silver, gold, platinum group metals). These secondary materials help break down these heavy compounds from environmental pollutants found within homes and restaurants. By treating this wastes through special methods specifically designed at specific temperatures and pressures, they could produce useful gases including hydrogen and methane.

Method used

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  • Combined method for treating kitchen waste and waste plastics to prepare hydrogen-rich fuel gas
  • Combined method for treating kitchen waste and waste plastics to prepare hydrogen-rich fuel gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix food waste and waste plastics in a ratio of 4:1 and transport them to the reactor, add water to the material to a water content of 90%, use pure nitrogen to discharge the air in the reactor, so that the reaction is carried out under a nitrogen atmosphere, and the reaction The reactor was heated and pressurized to 420°C and 24MPa and maintained for 40 minutes. After the reaction was completed, the reactor was cooled and pressurized with cooling water. High quality gas collection. The gas phase components are shown in Table 1.

Embodiment 2

[0029] Mix food waste and waste plastics in a ratio of 3:2 and transport them to the reactor, add water to the material to a water content of 90%, use pure nitrogen to discharge the air in the reactor, so that the reaction is carried out under a nitrogen atmosphere, and the reaction The reactor was heated and pressurized to 420°C and 24MPa and maintained for 40 minutes. After the reaction was completed, the reactor was cooled and pressurized with cooling water. High quality gas collection. The gas phase components are shown in Table 1.

Embodiment 3

[0031] Mix food waste and waste plastics in a ratio of 1:1 and transport them to the reactor, add water to the material to a water content of 90%, use pure nitrogen to discharge the air in the reactor, so that the reaction is carried out under a nitrogen atmosphere, and the reaction The reactor was heated and pressurized to 420°C and 24MPa and maintained for 40 minutes. After the reaction was completed, the reactor was cooled and pressurized with cooling water. High quality gas collection. The gas phase components are shown in Table 1.

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PUM

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Abstract

The invention discloses a combined method for treating kitchen waste and waste plastics to prepare hydrogen-rich fuel gas. The method comprises the following steps: crushing the collected kitchen waste and waste plastics, and conveying the crushed material to a supercritical water gasification reaction kettle, wherein the reaction kettle is filled with nitrogen gas; heating and pressurizing the reaction kettle by using an electric heater to 420 DEG C and 23-25 MPa, respectively; performing a reaction continuously for 40-60 min, and stirring the material at the rotation speed of 100-150 rpm byusing a magnetic stirrer; after the reaction is completed, cooling the reaction kettle to room temperature by using cooling water; and collecting the high-quality hydrogen-rich fuel gas by using an air pump, drying the gas, and performing storage. The method can realize the efficient treatment of the kitchen waste and the waste plastics; the synthesis gas produced by the kitchen waste and the waste plastics combined with supercritical water gasification has a high hydrogen concentration and high quality; and the secondary pollution to the environment in the treatment process is greatly reduced.

Description

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Claims

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Application Information

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Owner ZHEJIANG UNIV OF TECH
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