Pulverized coal hot blast stove for drying grain

Abstract

The invention relates to a pulverized coal hot blast stove for drying grain and belongs to the technical field of drying hot blast stoves.A flour mill is connected with one end of a cyclone type pulverized coal combustor, a combustion chamber is connected with the other end of the cyclone type pulverized coal combustor and connected with a stove body, a first fire baffle wall and a third fire baffle wall are fixedly connected with the upper portion of the stove body, an electric insertion plate is arranged blow an ash settling chamber and an ash accumulation hopper at the bottom of the combustion chamber, a screw conveyor is arranged below the electric insertion plate, a second fire baffle wall is fixedly connected with the bottom of the stove body, an inspection opening and an ash removing opening are located below the side face of the stove body, a first air supplementing opening is located in the side face of the combustion chamber, and a second air supplementing opening is located in the side face of the upper portion of the stove body.The pulverized coal hot blast stove for drying grain has the advantages that the structure is novel, the energy-saving effect is remarkable, a combustion reaction is complete, and important significance on environment protection is achieved; besides, cost can be reduced, and economic benefits can be improved; furthermore, the coal feeding amount and the air feeding amount can be adjusted, the temperature and pressure in the combustion chamber can be conveniently and stably controlled, and drying work in a drying tower can be stably carried out.

Description

technical field [0001] The invention belongs to the technical field of drying hot blast stoves, in particular to a pulverized coal hot blast stove used for grain drying. Background technique [0002] At present, one of the hot blast stoves used in domestic grain dryers is the fixed grate hot blast stove, which is suitable for miniaturization and has a simple structure, but high-quality lump coal is used as fuel, and the price is high, and it is a manual hand-fired stove, which is not suitable for large-scale The smoke and dust are black and polluted, the thermal efficiency is only 60%, and the residual carbon in the ash is 20%. The second is the chain-row coal-fired hot blast stove, which has the advantages of being suitable for both miniaturization and large-scale operation. It can burn raw coal, with a thermal efficiency of 70%, and about 15% of residual carbon in the ash. The coal used is the second-class bituminous coal with more than 5000 calories Calorific value, low-...

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Problems solved by technology

[0003] The invention provides a pulverized coal hot air stove for grain drying to solve the problems that the original chain-row coal-fired hot air stove cannot burn low-rank coal and lignite, and the coal burnout rate is low and the combustion efficiency is low.

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