Automatic Ignition and Coking Prevention Furnace for Lignite Processing System

Abstract

The invention relates to an automatic ignition and anti-coking spraying burning furnace for a brown coal processing system. The automatic ignition and anti-coking spraying burning furnace comprises a furnace body, an overhauling furnace door and a smoke discharging barrel; the automatic ignition and anti-coking spraying burning furnace is characterized in that a natural air inlet is formed in the bottom of a bottom layer of the furnace body, and a fuel blowing-in opening and a fire spraying opening are formed in the positions which are 1.5 m away from the bottom; three layers of air supplementing openings are formed and are formed in the tangential direction of the inner wall; an electric gate valve is installed at the top of the smoke discharging barrel, a hot air pipe is connected to the bottom of the smoke discharging barrel, and an electric gate valve and a temperature measurement sensor are installed at an outlet of the hot air pipe; and a temperature measurement sensor is arranged at the upper portion of the furnace body. By means of the automatic ignition and anti-coking spraying burning furnace, automatic ignition can be achieved, and coking is avoided; and long-time continuous work can be done, automatic temperature adjustment can be achieved, and the mated process requirements of the brown coal processing system can be met.

Description

technical field [0001] The invention belongs to coal drying equipment, in particular to an automatic ignition and anti-coking spray burning furnace of a lignite processing system. technical background [0002] Lignite is currently the main fuel for thermal power plants. Due to the high moisture content of raw coal (over 40%) and varying lump sizes, in order to give full play to the output of the generator, the lignite must be pulverized and dried to reach a particle size of 5 Below 10 mm, with water content below 15%. At present, most of them are first pulverized by a pulverizer and then dried by a dryer, and a drum dryer is usually used for drying. The disadvantages of the prior art are: complex process, large floor space, high cost, and high operating cost. Such as adopting the hot air stove with lignite powder as fuel to supply air for drying can overcome the deficiencies of the above-mentioned technologies, such as fluidized furnace, that is, some ventilation caps are ...

AI Technical Summary

Problems solved by technology

The disadvantages of the prior art are: complex process, large footprint, high cost, high operating cost

[0003] Disadvantages of fluidized fluidized furnace: First, it is difficult to ignite, and it needs to be heated to the ignition point of lignite with additional fuel to ignite

Especially when the machine stops suddenly during work, it is more difficult to ignite again

Secondly, during the combustion of lignite, when the combustion temperature exceeds the melting point of ash, the ash decomposes into a sticky slurry, which becomes lumpy after cooling. Once the vent cap is blocked, it is very difficult to clean it.

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