Pyrolysis gas reforming system

Patent metadata

Field	Value
Publication number	US-12172897-B2
Application number	US-202117551561-A
Country	US
Kind code	B2
Filing date	Dec 15, 2021
Priority date	Oct 6, 2021
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

A pyrolysis gas reforming system is provided. The pyrolysis gas reforming system includes a pyrolysis unit configured to perform pyrolysis of waste, an oil-gas separation unit configured to separate a product generated by the pyrolysis unit into oil and gas, a pyrolysis gas purification unit configured to refine pyrolysis gas generated through the separation by the oil-gas separation unit, a pyrolysis gas reforming unit configured to generate synthesis gas by reforming the pyrolysis gas purified by the pyrolysis gas purification unit, a hydrogen gas shift reaction unit configured to convert carbon monoxide contained in the synthesis gas generated by the pyrolysis gas reforming unit into hydrogen and carbon dioxide, and a hydrogen separation unit configured to separate hydrogen from the synthesis gas discharged from the hydrogen gas shift reaction unit, wherein combustion gas generated by a burner of the pyrolysis gas reforming unit and used to supply heat to the pyrolysis gas reforming unit is used to supply heat to the pyrolysis unit.

First claim

What is claimed is:

1. A pyrolysis gas reforming system comprising:
a pyrolysis unit configured to perform pyrolysis of waste;
an oil-gas separation unit configured to separate a product generated by the pyrolysis unit into oil and gas;
a pyrolysis gas purification unit configured to refine pyrolysis gas generated through the separation by the oil-gas separation unit;
a pyrolysis gas reforming unit configured to generate synthesis gas by reforming the pyrolysis gas purified by the pyrolysis gas purification unit;
a hydrogen gas shift reaction unit configured to convert carbon monoxide contained in the synthesis gas generated by the pyrolysis gas reforming unit into hydrogen and carbon dioxide; and
a hydrogen separation unit configured to separate hydrogen from the synthesis gas discharged from the hydrogen gas shift reaction unit; and
an oil heating unit configured to heat the oil produced through the oil and gas separation performed by the oil-gas separation unit,
wherein combustion gas generated by a burner of the pyrolysis gas reforming unit and used to supply heat to the pyrolysis gas reforming unit is used to supply heat to the pyrolysis unit,
wherein volatile gas generated in the oil heating unit is separated and supplied to the pyrolysis gas purification unit together with the pyrolysis gas.

2. The system according to claim 1 , further comprising a steam generation unit configured to generate steam and supply the steam to the pyrolysis gas reforming unit.

3. The system according to claim 2 , wherein the combustion gas discharged from the pyrolysis gas reforming unit is used to supply heat to the pyrolysis unit after supplying heat to the steam generation unit.

4. The system according to claim 1 , wherein exhaust gas discharged from the hydrogen separation unit is used to supply heat to the pyrolysis unit.

5. The system according to claim 1 , wherein tar is removed by spraying the oil from which the volatile gas is removed by the oil heating unit to the oil-gas separation unit.

6. The system according to claim 1 , wherein the oil from which the volatile gas is removed by the oil heating unit is supplied to a burner of the pyrolysis unit and burned.

7. The system according to claim 1 , wherein the oil from which the volatile gas is removed by the oil heating unit is supplied to the burner of the pyrolysis gas reforming unit and burned.

8. The system according to claim 1 , wherein in the oil heating unit, the oil is heated by at least one gas selected from among the combustion gas discharged from the pyrolysis gas reforming unit, the exhaust gas discharged from the hydrogen separation unit, and the combustion gas generated by the burner of the pyrolysis unit, used to supply heat to the pyrolysis unit, and then discharged.

9. The system according to claim 1 , further comprising a hydrogen turbine driven using oxygen received from the hydrogen separation unit.

10. The system according to claim 9 , wherein exhaust gas discharged from the hydrogen turbine is used to supply heat to the pyrolysis gas reforming unit.

11. The system according to claim 1 , wherein the pyrolysis gas is supplied to a burner of the pyrolysis unit and burned.

12. The system according to claim 1 , wherein the pyrolysis gas is supplied to the burner of the pyrolysis gas reforming unit and burned.

13. A pyrolysis gas reforming system comprising:
a pyrolysis unit configured to perform pyrolysis of waste;
an oil-gas separation unit configured to separate a product generated by the pyrolysis unit into oil and gas;
a pyrolysis gas purification unit configured to refine pyrolysis gas generated through the separation by the oil-gas separation unit;
a pyrolysis gas reforming unit configured to generate synthesis gas by reforming the pyrolysis gas purified by the pyrolysis gas purification unit;
a hydrogen gas shift reaction unit configured to convert carbon monoxide contained in the synthesis gas generated by the pyrolysis gas reforming unit into hydrogen and carbon dioxide; and
a hydrogen separation unit configured to separate hydrogen from the synthesis gas discharged from the hydrogen gas shift reaction unit; and
an oil heating unit configured to heat the oil produced through the oil and gas separation performed by the oil-gas separation unit,
wherein exhaust gas discharged from the hydrogen separation unit is used to supply heat to the pyrolysis unit,
wherein volatile gas generated in the oil heating unit is separated and supplied to the pyrolysis gas purification unit together with the pyrolysis gas.

14. The system according to claim 13 , wherein the oil from which volatile gas is removed by the oil heating unit is supplied as fuel to a burner of the pyrolysis unit and burned to generate combustion gas.

15. The system according to claim 13 , wherein the oil from which volatile gas is removed by the oil heating unit is supplied to a burner of the pyrolysis gas reforming unit and burned.

Assignees

• Doosan Enerbility Co Ltd

Inventors

• Kim Bong Keun
• Cho Sung Jin
• Nam Gyeong Mo
• You Su Nam
• Jeong Jae Yong

Classifications

• C01B2203/0283

  containing a CO-shift step, i.e. a water gas shift step · CPC title

• C01B2203/148

  involving a recycle stream to the feed of the process for making hydrogen or synthesis gas · CPC title

• C01B2203/1258

  Pre-treatment of the feed · CPC title

• C01B2203/1235

  Hydrocarbons · CPC title

• C01B2203/0816

  Heating by flames · CPC title