Microwave plasma gasification and recycle integrated system for domestic garbage

Patent metadata

Field	Value
Publication number	US-11465186-B2
Application number	US-201816652679-A
Country	US
Kind code	B2
Filing date	Jul 5, 2018
Priority date	Nov 21, 2017
Publication date	Oct 11, 2022
Grant date	Oct 11, 2022

Abstract

A microwave plasma gasification and recycle integrated system for domestic garbage. The system is fixed in a garbage truck compartment with a garbage inlet, and includes a closed chain-plate type feeder, a shredding machine, and a closed magnetic separator which are connected in sequence. The magnetic separator is further separately connected to a microwave plasma gasification furnace and a metal recycle tank. The microwave plasma gasification furnace is further separately connected to a stink processor, a plastic residue recycle tank, an integrated sewage treatment device, and a residue smashing machine. The stink processor is connected to a gas recycle tank. Both the residue smashing machine and the integrated sewage treatment device are connected to an aerobic fermentation tank. The aerobic fermentation tank is connected to a decomposed material recycle tank by means of a decomposed material forming and screening machine.

First claim

What is claimed is:

1. An integrated microwave plasma gasification and recycling system for domestic garbage, characterized in that the system being fixed in a carriage of a garbage truck having a garbage inlet, and comprising a closed chain-plate feeder, a shredder, a closed magnetic separator, a microwave plasma gasifier, an odor treatment device, a remnant pulverizer, an integrated sewage treatment equipment, a decomposed material forming and screening machine, an aerobic fermentation tank, a decomposed material recovery tank, a plastic slag recovery tank, a metal recovery tank, and a gas recovery tank; the closed magnetic separator has a metal material discharge port and a non-metal garbage discharge port, the microwave plasma gasifier has a feed port, a solid remnant recovery port for recovering organic garbage, a plastic slag recovery port, a leachate recovery port and an exhaust port, and the aerobic fermentation tank has a solid garbage feed port, a liquid waste feed port and a discharge port; wherein
the garbage inlet of the carriage of the garbage truck is connected with a feed port of the closed chain-plate feeder, and original domestic garbage is charged into the closed chain-plate feeder via the feed port of the closed chain-plate feeder; a discharge port of the closed chain-plate feeder is connected with a feed port of the shredder; a discharge port of the shredder is connected with the feed port of the closed magnetic separator; the non-metal garbage discharge port of the closed magnetic separator is connected with the feed port of the microwave plasma gasifier, and the metal material discharge port of the closed magnetic separator is connected with the metal recovery tank; the solid remnant recovery port, the plastic slag recovery port, the leachate recovery port and the exhaust port of the microwave plasma gasifier are connected with a feed port of the remnant pulverizer, the plastic slag recovery tank, a feed port of the integrated sewage treatment equipment, and a gas inlet of the odor treatment device, respectively, and the gas outlet of the odor treatment device is connected with the gas recovery tank; a discharge port of the remnant pulverizer and a discharge port of the integrated sewage treatment equipment are connected with the solid garbage feed port and liquid waste feed port of the aerobic fermentation tank, respectively; and the discharge port of the aerobic fermentation tank is connected with a feed port of the decomposed material forming and screening machine, and a discharge port of the decomposed material forming and screening machine is connected with the decomposed material recovery tank.

2. The system according to claim 1 , characterized in that the microwave plasma gasifier comprises a housing and a microwave plasma torch generator, a non-metal garbage conveyor with sieve pores, a reaction tank, a sewage extrusion separator, and a hopper respectively fixed within the housing via brackets; the exhaust port of the microwave plasma gasifier is provided at a top portion of the housing, the plastic recovery port and the leachate recovery port of the microwave plasma gasifier are respectively provided at a bottom portion of the housing, and the feed port and the solid remnant recovery port of the microwave plasma gasifier are provided at an upper part of two opposite side walls of the housing; wherein the reaction tank is located in a left part of the microwave plasma gasifier, with a top part and a bottom part of the reaction tank being connected with the exhaust port and the leachate recovery port of the microwave plasma gasifier, respectively; the microwave plasma torch generator is disposed close to an upper right part of the reaction tank, and a microwave plasma torch emission end of the microwave plasma torch generator is located within the reaction tank; the non-metal garbage conveyor is located below the microwave plasma torch emission end and extends through a middle part of the reaction tank, with one end thereof disposed closely under the solid remnant recovery port and the other end thereof fixed on the side wall of the housing opposite to the solid remnant recovery port; the sewage extrusion separator and the hopper are located above and under the non-metal garbage conveyor, respectively, and are both co-axially disposed at a right side of the reaction tank, with a feed port of the sewage extrusion separator being connected with the feed port of the microwave plasma gasifier and a bottom of the hopper being connected with the leachate recovery port of the microwave plasma gasifier.

3. The system according to claim 2 , characterized in that the microwave plasma torch generator comprises sequentially connected microwave generator, circulator and water load and microwave waveguide resonator; a non-metal microwave discharge tube used for emitting a microwave plasma torch is provided at a position where the microwave waveguide resonator has a maximum amplitude of microwave electric field, the non-metal microwave discharge tube is perpendicular to an axis of the microwave waveguide resonator and has a lower end protruding out of the microwave waveguide resonator, and a discharge wire is further fixed within the non-metal microwave discharge tube.

4. The system according to claim 3 , characterized in that the microwave generator is selected from any one of the group consisting of a magnetron, a velocity-modulated tube, a traveling-wave tube, a gyrotron, or an all solid-state microwave source.

5. The system according to claim 3 , characterized in that the non-metal microwave discharge tube is made of a microwave-transmissive non-metal material, and the non-metal microwave discharge tube is in sealed connection with a connection portion of the microwave waveguide resonator via a metal ring.

6. The system according to claim 2 , characterized in that the non-metal garbage conveyor comprises a material conveyor belt with sieve pores and an electric motor; wherein the sieve pores are evenly provided along an axis direction of the material conveyor belt for passing leachate and molten plastic on the material conveyor belt therethrough.

7. The system according to claim 6 , characterized in that pores are provided on two opposite side walls in the middle part of the reaction tank for the material conveyor belt to pass therethrough.

Assignees

• Univ Tsinghua

Inventors

• Zhang Guixin
• Liu Cheng
• Xie Hong
• Deng Lei

Classifications

• B65F3/00

  Vehicles particularly adapted for collecting refuse (vehicles in general B60; driving vehicle equipment or auxiliaries B60K; discharging contents by tilting entire vehicles B65G; wheeled apparatus for emptying sewers or cesspools E03F7/10) · CPC title

• A61L11/00

  Methods specially adapted for refuse {(disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00)} · CPC title

• B65F3/001

  for segregated refuse collecting, e.g. vehicles with several compartments · CPC title

• A61L2/18

  Liquid substances · CPC title

• B65F3/203

  with charging teeth, cutters or the like mounted on an axle or a drum (B65F3/202, B65F3/205, B65F3/206 take precedence) · CPC title