A warm plasma generator
A plasma and generator technology, applied in the field of ion source production, can solve the problems of huge fuel consumption and energy waste, and achieve the effect of improving utilization rate
Active Publication Date: 2017-01-25
TSINGHUA UNIV
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Problems solved by technology
[0003] In 2004, about 14.6959 million tons of fuel oil was used in the ignition and stable combustion process of thermal power generating units above 6MW, accounting for more than 70% of the fuel oil, and accounting for 8.4% of the country's total crude oil output that year. The fuel consumption in the process of ignition and stable combustion of boilers in thermal power plants is huge
Since the temperature of thermal plasma is as high as 10000K, using it to ignite coal powder will cause a lot of waste of energy
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[0060] A coaxial warm plasma generator such as figure 1 As shown, an arc is generated between the outer electrode 11 and the inner electrode 12, which is blown out by the air flow to generate a jet. This generator adopts a split structure design, in order to facilitate the replacement of vulnerable parts such as electrodes and the adjustment of the electrode spacing, and because the device is in the test stage, the adjustment of the electrode spacing is manually operated. The specific structure is as follows:
[0061] 1) Generator material selection
[0062] The selection of electrode materials and insulating materials in the generator is the focus of its design. The factors that affect the selection of electrode materials include the electronic work function of the material, the machinability of the material and the heat transfer performance of the material. According to the literature research, it is found that red copper, tungsten, cerium-tungsten alloy and graphite are c...
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The invention relates to a warm plasma generator and belongs to the technical field of plasma source design and manufacturing. The warm plasma generator is characterized in that an annular outer electrode made of copper and a conical inner electrode made of tungsten are respectively cooled in deionized water, the heat energy is transferred to a water cooling pipe for cooling through a seal gasket connected to the bottom of the inner electrode, a water inlet pipe formed in the outer walls of the electrodes is used for cooling a straight-tube-shaped nozzle of the annular outer electrode, a gas path seal ring is used for gas path sealing under the action of a locking nut, a water cooling pressing ring is used for preventing cooling water from entering discharge space through the water cooling seal ring at the same time, an air inlet turning ring is used for changing the air flow direction and velocity of the air used as the working gas entering the discharge space for further maintaining the stability of the discharge, and the temperature of the plasma gas is reduced from 10000K to 3000K at the frequency of 10kHz-40kHz under the high voltage of 10kV-40kV, so that the input power is reduced and the thermal energy utilization rate of the ignition process is increased. The warm plasma generator can be widely used in fields, such as coal-fired boiler ignition, ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) light sources and plasma-assisted combustion.
Description
technical field [0001] A warm plasma generator belongs to the technical field of plasma source production. Background technique [0002] According to the China Electricity Enterprise Federation, my country's power industry has developed rapidly in recent years, with the average annual growth rate of installed capacity of power plants exceeding 9.2%, and the growth rate of power generation exceeding 9.1%. By the end of 2012, the total annual power generation in the country had reached 4.99 trillion kWh, and the total installed capacity of power generation had reached 11.47 trillion kWh. At present, my country's annual power generation and power grid scale rank first in the world. In 2013, the capacity of new generating units was about 90 million kilowatts, of which thermal power generation increased by about 40 million kilowatts, renewable energy units increased by 47 million kilowatts, and nuclear power increased by about 2.21 million kilowatts. By the end of 2013, the cap...
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IPC IPC(8): H05H1/28H05H1/34
Inventor 李和平孙智兴郭恒
Owner TSINGHUA UNIV