Accurate combustion control system

Abstract

The invention discloses an accurate combustion control system which comprises a top opening, a combustion device body and a heat exchanger, wherein the interior of the combustion device body is hollow. The top opening of the combustion device body serves as a smoke vent. An inner cavity of the combustion device body serves as a combustion chamber. The smoke vent communicates with the heat exchanger. A shell of the combustion device body sequentially comprises a refractory layer, a heat preservation layer and a heat exchange layer from inside to outside. One or more auxiliary combustion devices are vertically arranged in the upper portion of the combustion chamber. The accurate combustion control system has the advantages that different from the mode that heat exchange is conducted in a combustion chamber of a traditional boiler, the heat preservation layer is arranged on the outer side of the refractory layer, heat in the combustion chamber cannot be dissipated easily, the temperature in the combustion chamber is effectively guaranteed, organic macromolecules which can be split and combusted only under the high-temperature condition are combusted sufficiently, the heat exchange layer on the outer side of the heat preservation layer sufficiently absorbs heat dissipated by the heat preservation layer, and the combustion efficiency of a boiler and the combustion utilization rate of coal are improved while the thermal conversion efficiency is guaranteed.

Description

Technical field: [0001] The invention relates to a precise control combustion system, belonging to a coal-fired boiler. Background technique: [0002] The existing theory of secondary combustion of flue gas from coal-fired boilers is to add a large amount of air to the flue gas to recombust the high ignition point combustibles in the flue gas and a small amount of carbon monoxide produced by the combustion of coal under anoxic conditions. However, according to the latest combustion theory proposed by Tsinghua University: Coal is also anoxic combustion under oxygen-rich conditions, which will produce a large amount of CO. On the basis of this theory, it can be seen that the existing coal-fired boiler flue gas secondary combustion method actually reduces the concentration of CO, so that CO cannot be fully burned. [0003] At the same time, coal and petrochemical organic fuels are complex organic macromolecules, some of which require higher temperatures for cracking and combus...

AI Technical Summary

Problems solved by technology

[0004] At present, boilers usually only focus on heat exchange, that is, a heat exchange layer is directly installed on the inner wall of the main combustion chamber for heat exchange, or a heat exchange layer is installed inside or outside the refractory layer on the inner wall of the main combustion chamber for heat exchange, so that the combustion chamber The furnace temperature is very low, causing the organic macromolecules that need to be cracked and burned under high temperature conditions cannot be fully burned, and the combustion efficiency is low; the content of combustibles in the flue gas is increased, causing environmental pollution; and in order to avoid the pollution caused by flue gas emissions Environmental pollution requires filtering or recycling of flue gas, increasing coal energy consumption

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