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Large space burning method of water coal slurry and its special device

A combustion method and technology of coal water slurry, which is applied in the direction of burners, lighting and heating equipment, and the combustion of block fuel and liquid fuel, etc., can solve the problem of high investment cost and operation cost of coal water slurry, ignition, and unstable combustion Power plants and other issues, to achieve the effect of enhancing wear resistance and robustness, reducing consumption, and reducing the generation of nitrogen oxides

Inactive Publication Date: 2006-06-07
唐艳芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that the ignition investment cost and operation cost of the power plant are high and the coal-water slurry cannot be used for the ignition of the power plant due to its inability to stably burn at low temperature, a kind of oxygen-enriched air as a combustion aid for the ignition of the power plant is proposed under oxygen-deficient conditions. Large space combustion method of launched coal slurry and its special power plant ignition equipment

Method used

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  • Large space burning method of water coal slurry and its special device
  • Large space burning method of water coal slurry and its special device
  • Large space burning method of water coal slurry and its special device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The weight percent of the coal-water slurry that uses is made up as follows:

[0040] 69% dry coal powder, 30% water and 1% chemical additives.

[0041] The coal-water slurry enters the combustion chamber 6 from the atomizer at a flow rate of 400kg / h; the gas with an oxygen volume percentage content of 80% is a combustion aid, and the gas is 440m 3 The flow rate of / h enters the annular gas box 3 through the oxygen-enriched conduit 5, and most of the gas is sprayed into the combustion chamber 6 through the tangential tuyere 8 through the conduit. After ignition, the coal-water slurry burns violently in the combustion chamber, and the combustion temperature can reach above 2000°C.

Embodiment 2

[0043] The weight percent of the coal-water slurry that uses is made up as follows:

[0044]65% dry coal powder, 34% water and 1% chemical additives.

[0045] The coal-water slurry enters the combustion chamber 6 from the atomizer at a flow rate of 400kg / h; the gas with an oxygen volume percentage content of 90% is used as a combustion aid, and the 400m 3 The flow rate of / h enters the annular gas box 3 through the oxygen-enriched conduit 5, and most of the gas is sprayed into the combustion chamber 6 through the tangential tuyere 8 through the conduit. After ignition, the coal-water slurry burns violently in the combustion chamber, and the combustion temperature can reach above 1900°C.

Embodiment 3

[0047] This example further explains the device of the present invention.

[0048] Such as figure 1 Shown, the large air combustion method of coal-water slurry of the present invention is used for power plant boiler ignition, uses special equipment 1-1 of the present invention to burn coal-water slurry, the flame of combustion is sprayed into boiler and ignites pulverized coal, pulverized coal and primary air 1- 3 is sent to the boiler, and the secondary air 1-2 is blown in at the same time, and the pulverized coal burns stably under the ignition of the coal-water slurry flame.

[0049] The device of the present invention such as figure 2 , 3 and 4. exist figure 2 Among them, the equipment includes a combustion chamber 6, an oxygen-rich conduit 5 located on the front wall of the combustion chamber 6, an annular gas box 3, an atomizer socket 4, a slag blowing hole 11, an ignition gas hole 9 and an ignition electrode 10, located in the combustion chamber 6, the tangential...

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Abstract

The present invention belongs to the field of fuel combustion technology, and aims at solving the problem that water coal slurry can not be burnt at low temperature with air as combustion improver unless some auxiliary heat source is adopted. Oxygen-rich air is used as combustion improver in realizing large space combustion and oxygen-deficiency combustion to produce certain amount of CO and H2 to inhibit thermal generation of nitrogen oxide and eliminate environmental pollution. CO and H2 in oxygen atmosphere produce secondary combustion, resulting in violent combustion. The present invention is used in burning water coal slurry to eliminate ash and slag effectively and has unique tangent air port for violent and complete combustion.

Description

technical field [0001] The present invention relates to a fuel combustion method and its special equipment, more specifically, the present invention relates to a coal-water slurry combustion method and its special equipment. Background technique [0002] Coal water slurry is a coal-based fluid fuel, which is a slurry composed of 70% coal powder, 30% water and a small amount of chemical additives, and has good fluidity and stability. Coal water slurry is a simple physical method to convert solid coal into fluid fuel. Coal-water slurry is convenient for storage, transportation and combustion control, and is known as "a new type of oil-substituting fuel". At present, the production of coal water slurry has been industrialized and commercialized. [0003] Most of the coal water slurry adopts the suspension combustion method. The coal-water slurry (fluid) passes through the atomizer and is atomized into many small-sized coal-water slurry droplets. Many coal-water slurry drople...

Claims

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Application Information

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IPC IPC(8): F23C1/02F23D11/16
CPCY02E20/34
Inventor 马大健唐艳芬
Owner 唐艳芬
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