Organic solid waste treatment device based on chemical-looping hydrogen production

Patent metadata

Field	Value
Publication number	US-12257614-B2
Application number	US-202118042640-A
Country	US
Kind code	B2
Filing date	Apr 25, 2021
Priority date	Dec 31, 2020
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

The present invention belongs to the field of energy and environmental protection and particularly relates to an organic solid waste treatment device based on chemical-looping hydrogen production and a method for using the same. The device comprises a pyrolysis reactor and a sleeve-type chemical-looping reactor, the sleeve-type chemical-looping reactor comprises an inner cavity, an outer cavity annularly wrapping the inner cavity, a syngas output device, a hydrogen output device, a pyrolysis gas inlet device, and a water vapor inlet device, and the pyrolysis reactor can generate pyrolysis gas, which then is conveyed to the sleeve-type chemical-looping reactor through the pyrolysis gas inlet device.

First claim

What is claimed is:

1. An organic solid waste treatment device based on chemical-looping hydrogen production, comprising a pyrolysis reactor ( 3 ) and a sleeve-type chemical-looping reactor ( 19 ), wherein the sleeve-type chemical-looping reactor ( 19 ) comprises an inner cavity and an outer cavity annularly wrapping the inner cavity, the pyrolysis reactor ( 3 ) can generate pyrolysis gas, which then is input to the inner cavity and the outer cavity through the pyrolysis gas inlet device ( 6 ), water vapor is input to the inner cavity and the outer cavity through a water vapor inlet device ( 7 ), syngas generated in the inner cavity and the outer cavity is output through a syngas output device ( 28 ), hydrogen generated in the inner cavity and the outer cavity is output through a hydrogen output device ( 29 ), an outer reaction chamber ( 17 ) is internally loaded with an outer chamber oxygen carrier, an inner reaction chamber ( 18 ) is loaded with an inner chamber oxygen carrier, and the outer chamber oxygen carrier and the inner chamber oxygen carrier can be converted into each other through a reversible chemical reaction;
the outer chamber oxygen carrier is a reduced oxygen carrier, which is oxidized into an oxidized oxygen carrier by the water vapor;
alternatively, the outer chamber oxygen carrier is an oxidized oxygen carrier, which is reduced into a reduced oxygen carrier by the pyrolysis gas;
the inner cavity is horizontally partitioned by an inner cavity partition plate ( 16 ) to form an inner gas distribution chamber ( 14 ) and an inner reaction chamber ( 18 ), and the outer cavity is horizontally partitioned by an outer cavity partition plate ( 15 ) to form an outer gas distribution chamber ( 13 ) and an outer reaction chamber ( 17 );
the syngas output device ( 28 ) is a three-way pipe, comprising a first syngas outlet branch pipe ( 23 ) in communication with the outer reaction chamber ( 17 ), a second syngas outlet branch pipe ( 24 ) in communication with the inner reaction chamber ( 18 ), and a syngas output pipe;
the hydrogen output device ( 29 ) is a three-way pipe, comprising a first hydrogen outlet branch pipe ( 26 ) in communication with the outer reaction chamber ( 17 ), a second hydrogen outlet branch pipe ( 25 ) in communication with the inner reaction chamber ( 18 ), and a hydrogen output pipe;
the pyrolysis gas inlet device ( 6 ) is a three-way pipe, comprising a first pyrolysis gas inlet branch pipe ( 8 ) in communication with the outer gas distribution chamber ( 13 ), a second pyrolysis gas inlet branch pipe ( 9 ) in communication with the inner gas distribution chamber ( 14 ), and a pyrolysis gas inlet pipe;
the water vapor inlet device ( 7 ) is a three-way pipe, comprising a first water vapor inlet branch pipe ( 11 ) in communication with the outer gas distribution chamber ( 13 ), a second water vapor inlet branch pipe ( 10 ) in communication with the inner gas distribution chamber ( 14 ), and a water vapor inlet pipe;
the first pyrolysis gas inlet branch pipe ( 8 ), the second pyrolysis gas inlet branch pipe ( 9 ), the second water vapor inlet branch pipe ( 10 ), the first water vapor inlet branch pipe ( 11 ), the first syngas outlet branch pipe ( 23 ), the second syngas outlet branch pipe ( 24 ), the second hydrogen outlet branch pipe ( 25 ), and the first hydrogen outlet branch pipe ( 26 ) are all provided with valves.

2. The organic solid waste treatment device according to claim 1 , wherein an active ingredient of the oxidized oxygen carrier comprises one of ferroferric oxide (Fe 3 O 4 ) and brownmillerite (Ca 2 Fe 2 O 5 ), and the oxidized oxygen carrier is further compounded with an inert component, which is one or more of Al 2 O 3 , ZrO 2 , and CeO 2 , and the oxidized oxygen carrier has a particle size of 100-300 μm.

3. The organic solid waste treatment device according to claim 2 , wherein a cross-sectional area of the inner reaction chamber ( 18 ) to that of the outer reaction chamber ( 17 ) has a ratio of 1:1, the outer cavity partition plate ( 14 ) is an annular porous partition plate, the inner cavity partition plate ( 16 ) is a circular porous partition plate, the annular porous partition plate and the circular porous partition plate have diameters of the pores of 50-100 μm, with a total area of the pores accounting for 50-70% of the surface area.

4. The organic solid waste treatment device according to claim 1 , wherein the pyrolysis reactor ( 3 ) is successively provided with a feed hopper ( 1 ), a feed auger ( 2 ), and a pyrolysis carbon collection hopper ( 4 ) along the feeding direction of the organic solid waste, and the pyrolysis reactor ( 3 ) is in communication with the pyrolysis gas inlet pipe through a pyrolysis gas output channel ( 5 ).

5. The organic solid waste treatment device according to claim 4 , wherein the pyrolysis reactor ( 3 ) has a pyrolysis temperature of 500-700° C., the sleeve-type chemical-looping reactor ( 19 ) has a reaction temperature of 800-1000° C., and the inside of the pyrolysis reactor ( 3 ), the inner reaction chamber ( 18 ), and the outer reaction chamber ( 17 ) are provided with heating means.

6. The organic solid waste treatment device according to claim 1 , wherein the sleeve-type chemical-looping reactor ( 19 ) is provided with a sealing bottom plate ( 12 ), the pyrolysis gas inlet device ( 6 ) and the water vapor inlet device ( 7 ) are fixed by inserting into the sealing bottom plate ( 12 ), the outer cavity and the outer cavity are partitioned by a partition plate ( 20 ), the inner reaction chamber ( 18 ) is provided with a sealing top plate ( 22 ), the sealing top plate ( 22 ) is provided with an inner reaction chamber feed and discharge channel ( 27 ), and the outer reaction chamber ( 17 ) is provided with an outer reaction chamber feed and discharge channel ( 21 ).

7. A method of using the organic solid waste treatment device according to claim 1 , comprising the following steps:
(1) placing the organic solid waste in a feed hopper, conveying the organic solid waste from a feed auger to the inside, performing pyrolysis at a pyrolysis temperature to generate a pyrolysis gas and a pyrolysis carbon, the pyrolysis gas entering a pyrolysis gas inlet device through a pyrolysis gas channel, and conveying the pyrolysis carbon to a pyrolysis carbon collection hopper for storage;
(2) loading the outer reaction chamber with a reduced oxygen carrier, loading the inner reaction chamber with an oxidized oxygen carrier, opening the valves of the second pyrolysis gas inlet branch pipe and the first water vapor inlet branch pipe, closing the first pyrolysis gas inlet branch pipe and the second water vapor inlet branch pipe, introducing water vapor into the outer reaction chamber, introducing pyrolysis gas into the inner reaction chamber so that an oxidation reaction occurs in the outer reaction chamber at an operating temperature to generate hydrogen, and a reduction reaction occurs in the inner reaction chamber at an operating temperature to generate syngas;
(3) after the reaction is completed, opening the valves of the second syngas outlet branch pipe and the first hydrogen outlet branch pipe, closing the valves of the first syngas outlet branch pipe and the second hydrogen outlet branch pipe, outputting hydrogen through the hydrogen output device, and outputting syngas through the syngas output device;
(4) opening the first pyrolysis gas inlet branch pipe and the second water vapor inlet branch pipe, closing the valves of the second pyrolysis gas inlet branch pipe and the first water vapor inlet branch pipe, introducing pyrolysis gas into the outer reaction chamber, introducing water vapor into the inner reaction chamber so that a reduction reaction occurs in the outer reaction chamber at an operating temperature t

Assignees

• Univ Huazhong Science Tech

Inventors

• Wang Xun
• Xu Tingting
• Xiao Bo

Classifications

• B09B3/70

  Chemical treatment, e.g. pH adjustment or oxidation (involving an extraction step B09B3/80) · CPC title

• C01B2203/1205

  Composition of the feed · CPC title

• B09B3/45 Primary

  Steam treatment, e.g. supercritical water gasification or oxidation · CPC title

• C01B3/02 Primary

  Production of hydrogen; Production of gaseous mixtures containing hydrogen · CPC title