A sludge in-situ recycling system device

Abstract

The invention relates to the field of environmental protection, and discloses a sludge in-situ recycling system device, including a vertical unpowered spiral stirring biological drying device, a vertical sandless jet flow carbonization furnace, a pulverizing vacuum liquefaction device, and a tail gas wet processing device , Dust collector, heat exchanger, negative pressure device. The present invention uses biological drying, carbonization, energy-saving and resource-based treatment of sludge and in-situ recycling technology, which realizes the truly seamless connection and closed loop of sludge treatment and disposal, and at the same time promotes the development of related extended industries, and truly achieves "green, circular, low-cost" Carbon" requirements. This technology is a new type of highly integrated sludge treatment and disposal comprehensive system, which has technical advantages such as low operating cost, small footprint, high degree of automation, simple operation and management, and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a sludge in-situ recycling system device. Background technique [0002] Sludge will inevitably be produced in urban sewage treatment. According to the estimate that sludge accounts for 0.8‰, the daily output of sludge (with a water content of 80%) in the country is about 40 million tons. Due to the high water content, the organic matter of these sludges The content is low and the total calorific value is not high, which brings great difficulties to recycling. At present, many technologies and equipment have been developed on how to reduce the water content in sludge, such as high-pressure plate and frame filter technology, heat pump technology, thin-layer thermal drying technology, rotary kiln drying technology, etc., but these technologies only realize sludge reduction purpose. Therefore, based on the above-mentioned high-efficiency dehydration technology, a...

AI Technical Summary

Problems solved by technology

Sludge carbonization requires heating. High-temperature carbonization can make the carbonized product have the characteristics of large specific area and pore size and high activity, but the fuel cost is high. Although the medium and low temperature carbonization controls the fuel cost, the specific area and pore size of the carbonized product are small, and the activity is poor. Water treatment and purification materials that are recycled and used in sewage treatment plants can only be regarded as low-quality stabilized by-products that can be used for harmless landfill or some soil improvement materials.

Moreover, it is always difficult to solve the odorous tail gas generated during the biocomposting and carbonization of sludge.

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