Exploration and application of zero-carbon technology for natural gas power generation

Zero carbon technology is an important technology for the future development of natural gas power generation 

Technical options, a breakthrough in zero-carbon technology, can be developed for natural gas

Electricity industry development in exchange for new space. Carbon capture, utilization and

Sequestration (CCUS) technology will capture carbon dioxide widely

Used in various fields, can realize resource utilization, with present

Practical operation. In recent years, hydrogen blending of natural gas has gradually become a research field

Investigate hot spots. Hydrogen blending of natural gas can increase natural gas combustion

Efficiency, while having energy saving and environmental protection benefits, is natural gas

Electricity is one of the key ways to achieve zero carbon emissions in the future. Gas turbine

The machine has been operating with high hydrogen/low calorific value gases for decades.

Currently, the most advanced HA-class gas turbines are capable of burning for days

Natural gas is mixed with up to 50% hydrogen (by volume) and

It is expected to be 100 percent hydrogen by 2030.

The characteristics of hydrogen are significantly different from those of natural gas.

Compared to methane, the calorific value per unit volume of hydrogen is methane

30%, and the calorific value per unit mass is 2.4 times that of methane. with

Sample calorific value, fuel volume increased significantly, but Huabai index and

Methane has not changed much. In addition, the combustion rate of hydrogen

Very fast, five to ten times faster than methane. And hydrogen combustion

High temperatures, about 170 degrees Celsius higher than methane combustion,

High NOx emission.

Based on the above inherent characteristics of hydrogen, GE HA level

The burner DLN2.6e of the gas turbine adopts micro-cell premixed combustion

The combustion technology was developed by GE and the U.S. Department of Energy

Development began in 2005 specifically for hydrogen combustion

Applied technology. Figure 9 shows a profile of DLN2.6e.

The grey color of the tube bundle part is advanced premix, red

The color part is the shell of the premix. Axial fuel is fired in stages

The burning nozzle is distributed on the integrated part of the transition section of the combustion cylinder

Lower. The rear half of the integral with a stage 1 nozzle inlet

Connect. Compressor exhaust countercurrent surrounds the entire combustion chamber.

The air counterflows into the burner end cap and then into the premix

The tube bundle and the fuel in the outer cavity of the tube bundle pass through the microhole in the tube wall

Mixed uniformly in microtubules

The design can solve some problems of hydrogen-doped combustion:

1. Fuel adaptability. The maximum variation range of Huabai index can be +/-15%, which is good

The same burner can burn both pure methane and pure hydrogen.

2. High premixing efficiency. Compared to the previous large nozzle with a cyclone, the DLN2.6e uses

Small size nozzle without cyclone (diameter of millimeter class), not only fully premixed, but

And can maintain the characteristics of fast fuel speed, when the fuel speed is faster than the combustion speed, can

In order to avoid the occurrence of tempering.

3. Strong NOx emission control ability. Using a small size nozzle, premixed fully, the burner and over

The crossing section is combined into one, reducing the time of high temperature smoke retention, using graded combustion to make fire

The high temperature area of the flame is more uniform, reducing NOx emissions.

The gas turbine is powered by 100% hydrogen or a mixture of hydrogen

Only the gas turbine and auxiliary systems need to be modified to a certain extent

Yes. So a gas-fired power plant built today does not mean

CO2 emissions will remain constant throughout the life cycle of the plant

Hold at the starting level. Future costs and technical challenges

Breaking can make hydrogen competitive and can be used as zero-carbon dispatchable

Fuel to supplement renewable energy.

In terms of hydrogen-doped combustion, there are more than 100 GE units worldwide

Hydrogen and low calorific value fuel units in operation, cumulative operation

More than 8 million hours. Long Ridge, USA

One of Energy's HA-class fires in Ohio

Gas-fired power plants are experimenting with blending natural gas into fuel

Hydrogen is the way to achieve a low-carbon transition. It's not just beauty

China's first hydrogen-fueled gas-fired power plant is also the world's first

HA class combined cycle gas power plant with hydrogen combustion.

The power plant is equipped with GE 7HA.02 gas turbine with installed capacity

485 megawatts, which is expected to meet 400,000 local homes

Demand for electricity. Long Ridge Energy pioneered industry response

With the first, the unit has now achieved 15%-20% (per body

Product calculation) proportion of hydrogen-doped combustion and planned in 2030

100% hydrogen burning capacity. In addition to powering the grid,

Long Ridge Energy also plans to convert this "low-carbon" electricity

To some of the most power-hungry data centers around,

To help them achieve carbon neutrality as soon as possible.

China's first hydrogen-fueled 9HA power plant will also be launched in Guangzhou