Brown coal pipe drier

Abstract

The invention discloses a brown coal pipe drier which comprises a rotating cylinder body and a center rotating shaft. The axis of the center rotating shaft coincides with the axis of the rotating cylinder body. The two ends of the center rotating shaft are supported on bearing bases on the two sides outside the rotating cylinder body respectively. The axis of the rotating cylinder body is oblique downwards from a feeding end cover to a discharging end cover. The center rotating shaft is of a hollow pipe structure. A hollow pipe oil inlet is connected with an oil inlet rotating connector. A hollow pipe oil outlet is connected with an oil pump through an oil outlet pipe. An oil pump oil outlet is connected with a smoke way heating ring pipe heat exchanger which is connected with an oil inlet of an oil tank. The hollow pipe is provided with a first sealing blocking plate and a second sealing blocking plate. The hollow pipe is provided with a radial oil inlet and a radial oil outlet. A brown coal drying pipe is arranged in a space between the outer wall of the center rotating shaft and the inner wall of the rotating cylinder body. Negative pressure is formed through the oil pump mounting rolling cylinder outlet position, safety is high, potential safety hazards caused by high temperature positive pressure are avoided, waste heat generated by a boiler or a process pipe is used as a heat source, circulating is reasonable, and energy is saved.

Description

technical field [0001] The invention relates to the technical field of coal drying equipment, in particular to a lignite tube dryer. Background technique [0002] Due to the high water content, low calorific value and high transportation cost of lignite, the combustion efficiency of direct use is too low, and it will be dried and dehumidified in advance before use. There are three drying methods: vibrating mixed flow drying, belt furnace drying and upgrading technology, and drum drying technology. In the prior art, the drum lignite dryer can reduce the moisture to less than 10%, and the calorific value can be increased to 4500 kcal / kg. However, the heat source of the general drum lignite dryer is a hot air stove, and the drying temperature is 500°C-700°C, which is prone to spontaneous combustion of lignite or even explosion. Affected by the internal structure of the drum, the degree of lignite fragmentation is high. [0003] The application number in the prior art is 20112...

AI Technical Summary

Problems solved by technology

However, the heat source of the general drum lignite dryer is a hot air stove, and the drying temperature is 500°C-700°C, which is prone to spontaneous combustion of lignite or even explosion. Affected by the internal structure of the drum, the degree of lignite fragmentation is high.

[0003] The application number in the prior art is 201120066249.4, and the name of the invention is a drum-type lignite dryer, which discloses a dryer equipment heated by oil, but this structure uses heating oil in the central tube, so the heat utilization efficiency is low , while affecting production efficiency

[0004] And the application number is 201010509539.1, and the name of the invention is material pipe coal dryer, which discloses a dryer heated by steam. Because it uses steam heating, it needs to consume a lot of energy.

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