Combustible ice efficient combustion system

Patent metadata

Field	Value
Publication number	US-12305852-B2
Application number	US-202217878954-A
Country	US
Kind code	B2
Filing date	Aug 2, 2022
Priority date	Aug 25, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A combustible ice efficient combustion system comprises a combustible ice storage unit and a combustion unit, the front end of the furnace of the combustion unit is provided with a combustor, the rear end of the furnace of the combustion unit is connected with a flue gas main pipe, the combustor is provided with a first fuel gas inlet, a second fuel gas inlet, a combustion-supporting gas inlet and a flue gas outlet, the first fuel gas inlet is provided with a combustion nozzle, the combustion nozzle is provided with a first gas inlet, a second gas inlet and a mixed gas outlet, the first gas inlet is connected with the combustible ice storage unit through a high-pressure natural gas pipeline, the second gas inlet is connected with an air source, and the mixed gas outlet is connected with the first fuel gas inlet of the combustor.

First claim

The invention claimed is:

1. A combustible ice efficient combustion system, comprising a combustible ice storage unit and a combustion unit, the front end of a furnace of the combustion unit being provided with a combustor, and the rear end of the furnace of the combustion unit being connected with a flue gas main pipe for discharging a high-temperature flue gas, wherein:
the combustor is provided with a first gaseous fuel inlet, a second gaseous fuel inlet, a combustion-supporting gas inlet and a flue gas outlet, the first gaseous fuel inlet is provided with a combustion nozzle, the combustion nozzle is provided with a first gas inlet, a second gas inlet, a third gas inlet and a mixed gas outlet, the first gas inlet is connected with the combustible ice storage unit through a high-pressure natural gas pipeline, the second gas inlet is connected with an air source, and the mixed gas outlet is connected with the first gaseous fuel inlet of the combustor; and
the high-pressure natural gas pipeline is connected with a natural gas branch pipeline, the natural gas branch pipeline is provided with a gas turbine, the natural gas branch pipeline conveys a high-pressure natural gas accounting for 50% to 60% of the total amount of the high-pressure natural gas in pipeline to the gas turbine for electricity generation, the generated electric energy is stored in an electric energy storage device, and the high-pressure natural gas is depressurized by the gas turbine to become a low-pressure natural gas, which is conveyed to the second gaseous fuel inlet of the combustor through a low-pressure natural gas pipeline.

2. The combustible ice efficient combustion system according to claim 1 , wherein the flue gas main pipe is connected with a flue gas branch pipe, and the flue gas branch pipe is connected with the third gas inlet of the combustion nozzle, so that a high-temperature flue gas accounting for 10% to 30% of the total amount of the flue gas in main pipe is injected into the combustion nozzle, mixed with air and the high-pressure natural gas, and then sent to the furnace of the combustion unit for combustion.

3. The combustible ice efficient combustion system according to claim 2 , wherein the combustor comprises an inner cylinder and an outer cylinder which are coaxial, front ends of the inner cylinder and the outer cylinder are sealed, rear ends of the inner cylinder and the outer cylinder are the combustion gas outlets, the combustion gas outlets are connected with the furnace of the combustion unit, the first gaseous fuel inlet is arranged in an upper side wall at the front end of the outer cylinder, the combustion-supporting gas inlet is arranged in a lower side wall at the front end of the inner cylinder, and the second gaseous fuel inlet is arranged at the front end of the inner cylinder.

4. The combustible ice efficient combustion system according to claim 3 , wherein the combustible ice storage unit comprises a plurality of heating devices, a combustible ice container placed in each heating device, a shared pipe connected with a gas outlet of the combustible ice container, and a gas storage tank connected with an outlet of the shared pipe.

5. The combustible ice efficient combustion system according to claim 4 , wherein the heating device is a water jacket provided with a hot water inlet and a cold water outlet, and the hot water inlet and the cold water outlet between two adjacent water jackets are connected through a pipeline.

6. The combustible ice efficient combustion system according to claim 5 , further comprising a first heat exchanger, wherein the first heat exchanger comprises a high-temperature flue gas inlet, a medium-temperature flue gas outlet, a cold air inlet and a hot air outlet, the high-temperature flue gas inlet is connected with the flue gas main pipe, and the hot air outlet is connected with the combustion-supporting gas inlet of the combustor through a hot air pipeline.

7. The combustible ice efficient combustion system according to claim 5 , further comprising a second heat exchanger, wherein the second heat exchanger comprises a medium-temperature flue gas inlet, a low-temperature flue gas outlet, a cold water inlet and a hot water outlet, the medium-temperature flue gas inlet is connected with the medium-temperature flue gas outlet of the first heat exchanger, the low-temperature flue gas outlet is connected with a chimney through a low-temperature flue gas pipeline, the cold water inlet is connected with the cold water outlet of the water jacket at the tail end of the combustible ice storage unit, and the hot water outlet is connected with the hot water inlet of the water jacket at the head end of the combustible ice storage unit.

8. The combustible ice efficient combustion system according to claim 6 , wherein a combustible ice connecting pipeline between the gas outlet of each combustible ice container and the shared pipe is provided with a pressure relief valve, and the shared pipe connecting pipeline between the outlet of the shared pipe and the gas storage tank is provided with an electric regulating valve.

9. The combustible ice efficient combustion system according to claim 8 , wherein the hot air pipeline is provided with a first fan to introduce hot air into the combustion-supporting gas inlet, and the low-temperature flue gas pipeline is provided with a second fan to introduce a low-temperature flue gas into the chimney.

10. The combustible ice efficient combustion system according to claim 9 , wherein the first fan, the second fan, the pressure relief valve and the electric regulating valve are electrically connected with the electric energy storage device respectively to acquire electric energy.

Assignees

• Univ Guangdong Technology

Inventors

• Liu Xiaozhou
• Liang Hao
• Yuan Jinghan

Classifications

• F23C2202/20

  Premixing fluegas with fuel · CPC title

• F17C13/04

  Arrangement or mounting of valves (valves per se F16K {; snap-coupling of nipples F16L37/00}) · CPC title

• F17C2205/0332

  Safety valves or pressure relief valves · CPC title

• F17C2221/033

  Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG · CPC title

• F17C2205/0352

  Pipes · CPC title