A microwave heating device

Abstract

The invention discloses a microwave heating device which comprises an upper sealing head, a shell and a lower sealing head. The upper sealing head is provided with a feed inlet, the lower sealing headis provided with a discharge outlet, a plurality of vibration beds are arranged in the shell and arrayed in a multi-layer staggered mode in a Z shape from top to bottom, the vibration beds are connected with vibrators through linkage rods, microwave emitters are arranged above the vibration beds separately, each microwave emitter comprises one or more waveguide pipes, the waveguide pipes penetrate through the shell horizontally from one end of the shell to the other end, the two ends of the portions, outside the shell, of the waveguide pipes are connected with magnetrons, and the portions, inside the shell, of the waveguide pipes are provided with feed troughs. According to the microwave heating device, the microwave incoherent power synthesis technology is adopted, rapid heating and rapid drying are achieved, and the efficiency of converting microwave energy into heat energy is improved. The microwave heating device has the advantages of being thorough in drying, clean, environmentally friendly and easy to scale up, saving energy, reducing consumption and the like.

Description

technical field [0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a microwave heating device. Background technique [0002] The basic characteristics of China's energy resources are "rich in coal, short of oil and low in gas". Among the world's proven energy reserves, my country's coal accounts for about 13.5% of the world's total, oil accounts for 1.3%, and natural gas accounts for 1.1%. Coal is the main energy source in my country, accounting for about 70% of the total primary energy consumption for a long time, and will continue to play a dominant role in my country's energy structure for a long period of time in the future. Low-rank coal (lignite / sub-bituminous coal), which accounts for more than 55% of my country's proven coal reserves (1,020 billion tons), has a low degree of coalification, and the volatile matter contained in it is equivalent to 100 billion tons of oil and gas resources. Low-rank coal has the adv...

AI Technical Summary

Problems solved by technology

Most of the existing coal drying technologies use methods such as drum drying, fluidized bed drying, and belt drying. The drying devices used in these drying methods have complex structures, low efficiency, and poor drying degrees.

For example, coal particle size is limited in fluidized bed drying. Drum dryer or rotary drum drying device is used for raw coal drying, which is bulky, occupies a large area, has high temperature of imported hot air, loses volatile components of coal, has large dust, and is easy to explode. Poor safety, low production capacity

[0004] Patent CN102261822A discloses a device for drying lignite by microwave fluidization, including a microwave heating chamber and a fluidized bed arranged at the bottom of the microwave heating chamber and communicating with it. The microwave generating device is arranged on the side of the furnace shell. It is difficult to bring out the moisture quickly, and the depth of microwave penetration of water-containing lignite is limited, so it is difficult to ensure the uniformity of drying and deep drying, and mass production cannot be realized, and the uneven microwave radiation and the interaction of electromagnetic waves emitted by multiple magnetrons are not considered. Interference offset and other issues

[0005] The above known technical solutions all have problems such as large equipment investment, complex equipment process, low drying efficiency, high energy consumption, and inability to deep dry, which makes it difficult to realize large-scale coal drying.

From the perspective of the application of coal drying and upgrading technology, there is still a lack of perfect technology and technology in terms of engineering application and economy.

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