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Water coal pulp fluidized suspension high effect cleaning combustion technology

A clean combustion, coal-water slurry technology, applied in fluidized bed combustion equipment, fuel burning in a molten state, combustion methods, etc., can solve problems such as increased NOX emissions, high temperature coking has not been effectively solved, and environmental pollution, etc. To achieve the effect of good load regulation characteristics, low cost and good quality adaptability

Inactive Publication Date: 2003-12-03
姜秀民
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AI Technical Summary

Problems solved by technology

[0002] So far, high temperature coking has not been effectively solved during the suspension combustion process of coal water slurry
In addition, the high temperature environment of suspension combustion, especially the temperature in the combustion center area can reach about 1500-1800 °C, which increases the NO X At the same time, it is difficult to directly desulfurize during the combustion process, causing environmental pollution. The suspension combustion of coal water slurry still requires atomization guns, burners, filters and other devices and complex high-pressure air slurry delivery systems.

Method used

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Examples

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Embodiment Construction

[0018] The present invention will be further described below by specific embodiment:

[0019] Add quartz sand and limestone with a particle size of less than 5mm to the air distribution plate of the non-uniform air distribution combustion device through the media bed material replenishment device. Content, determine calcium, sulfur molar ratio is 2-4. Water passes through the heating tube bundle of the combustion chamber. The primary air of 7000-14000Pa from the fan is sent to the bed through the non-uniform air distribution combustion device, so that the media bed material is in a fluidized state. The hot flue gas ejected from the flue gas generator on the upper or lower part of the air distribution plate of the non-uniform air distribution combustion device enters the combustion chamber and heats the media bed material to about 400°C.

[0020] The feeding device with air purging and cooling functions provided around the outlet pipe of the header on the furnace roof makes t...

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Abstract

A fluidizing-suspension efficient and clean combustion technology for water-coal slurry includes feeding granular quartz sand and lime stone onto burning unit, heating them to 400 deg.C by hot fume and primary wind to become fluidized state in dense-phase region, dropping water-coal slurry in the dense-phase region, burning the fluidized material at 850-950 deg.C, decomposing the water-coal slurry to become particles, carrying said particles in the suspension combustion chamber in loose-phase region by fume, suspension combustion, returning the residual particles and bed material back to combustion chamber for burning off, capturing the residual particles from high-temp fume, and returning them back to dense-phase region for burning off.

Description

technical field [0001] The invention belongs to the technical field of pulverized coal combustion, and relates to a high-efficiency and clean combustion process of coal-water slurry fluidized suspension, in particular to a composite combustion process integrating circulating fluidized bed combustion and coal-water slurry suspension combustion. Background technique [0002] So far, high temperature coking has not been effectively solved during the suspension combustion process of coal water slurry. In addition, the high temperature environment of suspension combustion, especially the temperature in the combustion center area can reach about 1500-1800 °C, which increases the NO X At the same time, it is difficult to directly desulfurize during the combustion process, causing environmental pollution. The suspension combustion of coal water slurry still requires atomization guns, burners, filters and other devices and a complex high-pressure air slurry ...

Claims

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Application Information

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IPC IPC(8): F23C10/02
Inventor 姜秀民马玉峰万启科李学恒乔恩言包福义
Owner 姜秀民
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