Moist sludge oxygen-enhanced combustion method and device

Abstract

The invention provides a moist sludge oxygen-enhanced combustion method. The moist sludge oxygen-enhanced combustion method comprises the following steps: introducing direct-flow primary air and rotational-flow secondary air into a combustor, spraying oil for igniting and combusting; after the combustion is stable, introducing oxygen-rich air to form an oxygen-rich atmosphere to continuously combust; atomizing and then introducing the moist sludge into the combustor, gradually increasing the flow rate of the oxygen-rich air while introducing the sludge, thereby completing sludge combustion. The invention provides a device for realizing the method, wherein the device comprises a sludge combustor, a sludge atomizer and an ignition oil gun; a sludge spray nozzle is arranged on the center of the end part of the sludge combustor; an oxygen-rich air spray nozzle, a primary air spray nozzle and a secondary air spray nozzle are arranged from the inside to the outside in sequence by taking the sludge spray nozzle as a center; the sludge atomizer is arranged at an outlet of the sludge spray nozzle; the ignition oil gun is arranged on the inner wall of the sludge combustor. The moist sludge is directly combusted under the oxygen-rich atmosphere, the ignition is stable and the combustion is efficient, so that defects of large energy consumption and a complex process in a sludge drying process in an existing normal sludge incineration method are overcome, and energy-saving and environment-friendly effects are good.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment, and in particular relates to an oxygen-increased combustion method and device containing wet sludge. Background technique [0002] With the deepening and development of sewage treatment technology, the amount of sludge discharge has increased significantly, and the number and types of toxic and harmful substances concentrated in it have gradually increased, which has brought enormous pressure to the ecological environment. How to dispose of sludge scientifically and properly is an urgent problem to be solved. environmental problems. At present, the existing sludge treatment methods mainly include landfill, incineration and agricultural use. Due to landfill encroaching on a large amount of land, increasing disposal costs, and with the improvement of environmental protection standards and the implementation of recycling policies, landfilling will not be a sustainable development path. Sl...

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Problems solved by technology

[0004] Aiming at the problems of the prior art, the present invention provides a method and device for oxygen-increased combustion of wet sludge, the purpose of which is to directly burn wet sludge under an oxygen-enriched atmosphere, with stable ignition and high combustion efficiency, which overcomes the The existing conventional sludge incineration method has the disadvantages of high energy consumption and complicated process in the sludge drying process, and has good energy-saving and environmental protection effects

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