Totally-enclosed thermal coupling biological drying reaction device and method

Abstract

The invention discloses a totally-enclosed thermal coupling biological drying reaction device and method. to the method comprises steps of mixing and feeding to-be-treated high-water-content organic waste and biologically-dried clinker into the crushing integrated device to be mixed and crushed; feeding the mixed material meeting the requirements of particle size and moisture content into a rotarybiological drying device; feeding hot air from the combustion device into the rotary biological drying device to provide oxygen and high background temperature for biological drying reaction of mixedmaterials; performing biological drying for 3 to 4 days; reducing the moisture content of the clinker to below 40% and taking out the clinker; feeding part of the clinker into a clinker bin for subsequent back mixing; feeding the remaining clinker into a combustion device for combustion; feeding wet and hot waste gas generated in the biological drying process into a condensing device to be condensed; temporarily storing water separated out in the condensation process at the bottom of the cold condensation device, feeding non-condensable gas into the combustion device to provide oxygen for clinker combustion, using part of heat generated in the clinker combustion process for heating air, and feeding redundant heat into the waste heat recovery device to be recovered.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and in particular relates to a fully enclosed heat-coupled biological drying reaction device and method. Background technique [0002] Organic solid waste (such as domestic garbage, sludge, etc.) has the characteristics of a large amount of treatment and complex types of pollutants, while organic solid waste with high moisture content has a low calorific value and is easily corrupted, resulting in landfill and incineration. The difficulty of pollution control is increasing, and the reduction and resource utilization technology of organic solid waste with high water content has gradually become a research hotspot all over the world. [0003] Biological drying is a new type of biological treatment technology evolved from the principle of aerobic fermentation. In the process of biological drying, microorganisms degrade the degradable organic matter under aerobic conditio...

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Problems solved by technology

However, there are still a series of problems in the biological drying, such as the Chinese patent application: a kind of heat pump assisted sludge biological drying device (CN 106746474 A) adopts the combination of drum biological drying and dehumidification heat pump for the good treatment of sludge. Oxygen biological drying has the purpose of saving energy consumption and organizing the emission of odor, but this method has two significant disadvantages: 1) The investment and operating costs of the heat pump are high, which is extremely unfavorable to industrialization; 2) The biological drying process The waste gas generated in the waste gas still needs secondary treatment; Chinese patent: an energy-saving, efficient and rapid biological drying technology for municipal sludge (CN 105217912 B), which achieves the purpose of rapid biological drying of sludge by adding high-efficiency bacterial agents, but this method The disadvantage is that the biological drying takes about 33 days, which is too long, which is unfavorable in the process of industrial operation; Chinese patent: biological drying method of domestic waste (CN 106040700 B), which mixes straw, woody peat and domestic waste. Biological drying to achieve efficient dehydration of domestic waste. The disadvantage of this method is that too much conditioning agent is added, which leads to high operating costs in the industrialization process

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