# US 9,518,235 B2 · Entrained-flow gasifier and gasification method using the same for synthesizing syngas from biomass fuel

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- Number: US 9,518,235 B2
- Document ID: US9518235B2
- Status: Granted
- Kind: B2
- Application number: 14/314,023
- Filed: 2014-06-24
- Published: 2014-10-16
- Granted: 2016-12-13
- Earliest claimed: 2011-12-29
- Assignees: Wuhan Kaidi Engineering Technology Research Institute Co., Ltd.
- Applicants: Wuhan Kaidi General Research Institute of Engineering & Technology Co., Ltd.
- Inventors: Yilong Chen; Yanfeng Zhang; Minggui Xia; Liang Zhang
- Web page: https://patentgrep.com/patent/US9518235B2

## CPC

- C10J 3/72: Other features
- C10J 3/18: using electricity
- C10J 3/466: {Entrained flow processes}
- C10J 3/485: {Entrained flow gasifiers}
- C10J 3/506: {for entrained flow gasifiers}
- C10J 3/723: {Controlling or regulating the gasification process}
- C10J 2200/152: Nozzles or lances for introducing gas, liquids or suspensions
- C10J 2300/0906: Physical processes, e.g. shredding, comminuting, chopping, sorting
- C10J 2300/0916: Biomass
- C10J 2300/0959: Oxygen
- C10J 2300/0976: as steam
- C10J 2300/1238: by plasma
- Y02P 20/145: the feedstock being materials of biological origin
- C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A microwave plasma based entrained flow gasifier of biomass, including a furnace body and a fuel pretreatment system. The furnace body includes a fuel inlet disposed at the lower part of the furnace body, a syngas outlet disposed at the top of the furnace body, and a slag outlet disposed at the bottom of the furnace body. The fuel inlet presents in the form of nozzles. The fuel pretreatment system is disposed outside of the furnace body, and includes a fuel crushing apparatus, a sieving apparatus disposed downstream to the fuel crushing apparatus, a first fuel container for receiving particle size-qualified fuel, a second fuel container for receiving particle size-unqualified fuel, and a feeding hopper disposed downstream to the first fuel container. The first fuel container and the second fuel container are disposed side-by-side downstream to the sieving apparatus.

## Claims

### Claim 1

A gasifier, comprising: a furnace body and a fuel pretreatment system, wherein the furnace body is vertically disposed and comprises a fuel inlet disposed at a lower part of the furnace body, a syngas outlet disposed at a top of the furnace body, and a slag outlet disposed at a bottom of the furnace body;
the fuel inlet comprises nozzles;
the fuel pretreatment system is disposed outside of the furnace body, and comprises a fuel crushing apparatus, a sieving apparatus disposed downstream to the fuel crushing apparatus, a first fuel container for receiving particle size-qualified fuel, a second fuel container for receiving particle size-unqualified fuel, and a feeding hopper disposed downstream to the first fuel container;
the first fuel container and the second fuel container are disposed side-by-side downstream to the sieving apparatus;
a bottom of the feeding hopper is connected to the furnace body via the nozzles;
a monitoring unit is disposed close to the syngas outlet at the top of the furnace body;
the nozzles are disposed radially along the furnace body and are between 2 and 4 in number; and
one or two layers of microwave plasma generators are disposed in parallel at a gasification zone of the furnace body, and each layer of the microwave plasma generator comprises between 2 and 4 working gas inlets.

### Claim 2 (depends on 1)

The gasifier of claim 1, wherein the microwave plasma generators are disposed horizontally/tangentially on the furnace body.

### Claim 3 (depends on 1)

The gasifier of claim 1, wherein the microwave plasma generators have large electrode gap, strong plasma activity, and wide volume range.

### Claim 4 (depends on 2)

The gasifier of claim 2, wherein the microwave plasma generators have large electrode gap, strong plasma activity, and wide volume range.

### Claim 5 (depends on 3)

The gasifier of claim 3, wherein a microwave power source of the microwave plasma generators has a basic frequency of 2.45 GHz, and a power of a single microwave plasma generator is within 200 kW.

### Claim 6 (depends on 4)

The gasifier of claim 4, wherein a microwave power source of the microwave plasma generators has a basic frequency of 2.45 GHz, and a power of a single microwave plasma generator is within 200 kW.