Automatic ignition and anti-coking spraying burning furnace for brown coal 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 a 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 (up to 40% or more) and different lumpiness, in order to give full play to the output of the generator, the lignite must be crushed and dried to achieve a particle size of 5 Below millimeter, water content is below 15%. At present, most of them are first crushed by a pulverizer and then dried by a dryer, which usually uses a drum dryer. The disadvantages of the prior art are: complex process, large area, high cost, and high operating cost. For example, a hot blast stove using lignite powder as fuel can overcome the shortcomings of the above technology, such as a fluidized bed furnace, that is, a number of ventilation caps are installed at the bottom of the cylindric...

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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