Sludge anhydration and burning process, and its systematic device

Abstract

The invention relates to a sludge drying and burning technique and its system devices, applying to the handling of active sludge in urban sewage treatment plants, its process flows through: wet sludge stock house, measuring bin, sludge mixer, sludge dryer, granular splitter, cooler, drying products storage bin, incinerator, smoke gas cleaning devices, which is characterized by: said incinerator is bubbling fluid bed incinerator with coal economizer, air heater fixed in its end part, high-heat smoke gas generated by burning is used to heat heat-conducting oil and cool air individually, and heat-conducting oil after being heated is transferred to sludge dryer through the circulating pump to dry wet-sludge. The invention is characterized by: take heat-conducting oil as heating medium, use the heat generated by burning dry sludge to heat heat-conducting oil and then dry wet-sludge to make full use of resources; the volume-reducing quantity after drying and burning could reach over 90%; the percentage of desulphurization in incinerator could reach 75% as a result of adopting two stage technology of sulfur removal, and the gross percentage of desulphurization meets national environmental legislation requirements. The invention accomplishes the resources, volume reduction, and innocence of sludge.

Description

1. Technical field: [0001] The invention relates to a sludge treatment technology, in particular discloses a sludge drying and incineration process and a system device thereof, which are suitable for the treatment of activated sludge in urban sewage treatment plants. 2. Background technology: [0002] In the activated sludge of general urban sewage treatment plants, the content of organic matter in the dry sludge state can reach up to 80%. The organic matter in sludge is complex, containing a large amount of protein, amino acid, fat, vitamin, mineral oil, detergent, humus, bacteria and metabolites, various nitrogen-containing and sulfur-containing substances, volatile odorous substances, parasites and pathogenic microorganisms, etc. Volatile odorous substances are mainly organic sulfur and organic nitrogen. [0003] The next 10 years will be the golden age of my country's sewage treatment market. Thousands of sewage treatment plants will be built. Each sewage treatment pla...

AI Technical Summary

Problems solved by technology

[0005] (1) Smell: many perishable organic substances emit various foul smells during sludge treatment, transportation and storage, which affect the environment;

[0006] (2) High risk: sludge contains a large number of viruses, bacteria, protozoa and high concentrations of heavy metals such as zinc, copper, chromium, lead, cadmium, and toxic organic compounds, which are harmful to water resources and human health. a potential danger

At present, only concentration and mechanical dehydration can not reduce pollution, nor can it meet the needs of sanitation, so it cannot meet the requirements of sludge disposal

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