Longitudinally arranged coal gas integrated powder coal hand fired furnace and pressure loaded steam boiler used for assembling hand fired furnace

Abstract

The invention provides a longitudinally arranged coal gas integrated powder coal hand fired furnace. A primary combustion gasification chamber is arranged in space above a one-story fire grate of the body of the furnace; a front furnace wall is provided with an upper coal feeding inlet, a lower coal feeding inlet and a primary air shutter; an inner furnace wall opposite to the front furnace wall is provided with a low crater on the one-story fire grate, the low crater is communicated with a secondary combustion chamber and has a flow sectional area of 0.37 to 0.41 m<2> / 0.7 MW, and the height from the upper flat surface of the low crater to the one-story fire grate is 21 to 33% of longitudinal effective length of the one-story fire grate between the front furnace wall and the inner furnace wall. A technical scheme provided in the invention enables stable smoke abatement, clean combustion and rated operation to be realized under the condition that technical regulations on natural ventilation are met, and therefore, the usage requirements of environment friendliness, low energy consumption and safety are satisfied and safety of firemen during operation is guaranteed.

Description

technical field [0001] The patent application of the present invention relates to small and medium-sized scattered coal hand-fired furnaces, and in particular to a coal-to-gas combustion furnace with a low burner structure. Background technique [0002] The low crater semi-coal gasification combustion furnace has banned the upper water pipe grate of the double-layer grate coal gasification furnace, thus eradicating the hidden danger of the "explosion pipe" permeable water shutdown vicious accident. The article "Low burner semi-gas combustion furnace and its application" published in the 4th issue of "Energy Conservation" magazine in 2002, expounded the basic structure and working principle of the "low burner" coal-to-gas combustion furnace. The burner is located in a single-layer grate The lower position above the furnace wall is the only channel for the combustion flue gas of the primary combustion chamber, also known as the gasification chamber, to enter the secondary comb...

AI Technical Summary

Problems solved by technology

[0005] Black smoke is emitted when starting the furnace and adding coal. Due to the small cross-sectional area of ​​the burner and the large smoke resistance, the output is only about 1 / 5 of the rated value under the natural ventilation operation without blast, which is far from meeting the constant temperature standard. Heating and other actual heating needs;

[0006] 2. The adaptability of coal types is poor, and the use of coal is picky

[0007] This furnace can only use weakly coked lump coal, and coal-to-gas operation. Since the output is increased by increasing the blast pressure and air volume, it is not suitable for slightly heavy coking, large slagging blocks, and cannot be hooked by the grate gap. Ashed coal;

[0008] 3. Positive pressure combustion has serious pollution and poor safety

[0009] Blowing air leads to positive pressure combustion operation, and the overflow of smoke and dust makes the environment of the furnace extremely poor, especially when deflagration occurs and carbon monoxide overflows, which seriously endangers the safety of the furnace and the health of the furnace personnel.

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