Powdery straw cleaning combustor

Abstract

The invention discloses a powdery straw cleaning combustor. The combustor comprises a combustor body, wherein the combustor body comprises a combustor shell, a combustion chamber and a flue gas outlet, wherein the combustion chamber and the flue gas outlet are positioned in the combustor shell; the combustion chamber comprises a cylindrical part and a conical part, the combustion chamber is near to the flue gas outlet, the combustor shell is provided with a primary air inlet pipeline and a secondary air inlet pipeline, the primary air inlet pipeline is axially parallel to the combustion chamber, the secondary air inlet pipeline is tangent to the cylindrical part of the combustion chamber, a nozzle of the secondary air inlet pipeline is located on the inner wall of the combustion chamber oris close to the inner wall of the combustion chamber, and a cylindrical backflow cone is arranged at the junction of the flue gas outlet of the combustion chamber and the cylindrical part of the combustion chamber. The powdery straw cleaning combustor has the advantages of lean combustion and liquid slag discharge, the combustor is compact in structure, high in outlet smoke cleanliness and uniform in temperature field, good in combustion stability, small in solid incomplete combustion loss, less in emission of Nox and particulate matters, and the powdery straw cleaning combustor has importantsignificance in promoting the development of renewable energy sources and reducing the emission of pollutants.

Description

technical field [0001] The invention relates to the technical field of combustion equipment, in particular to a powdery straw thin combustion device, to the field of renewable energy utilization, and to the field of comprehensive utilization of ash. Background technique [0002] The existing straw combustion mainly adopts grate combustion and fluidized bed combustion, and there are mainly the following problems in operation: ① low energy density makes it difficult to collect, store and transport straw raw materials, and the feeding system is complicated and huge; ② low density of straw particles causes residence time Small and incomplete combustion loss of solids; ③ The problem of slagging and contamination on the heating surface caused by low ash melting point; ④ PM 2.5 High particulate matter emissions. To solve the above problem ①, powdered straw fuel can be used by taking advantage of the relatively small space required for storage and transportation of powdered fuel. ...

AI Technical Summary

Problems solved by technology

[0005] At present, straw biomass combustion devices mainly include grate combustion and fluidized bed combustion, and there are mainly the following problems in operation: ① low energy density makes straw storage and transportation difficult, and the feeding system is huge and complicated; ② low particle density causes residence time Short and incomplete combustion loss of solids; ③ Low ash melting point causes serious slagging and contamination on the heating surface; ④ PM 2.5 high particulate emissions

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