Energy-efficient continuous sludge resource processing system

Abstract

The invention relates to an energy-efficient continuous sludge resource processing system. The energy-efficient continuous sludge resource processing system comprises a sludge conveying apparatus (1), a sludge storage tank (2), a medicine addition apparatus (3), a preheating stirrer (4), a plug flow reactor (5), a condensate liquid flash distillation apparatus (6), material flash distillation equipment (7), a sludge dehydrating apparatus (8), a protein liquid separator (9), a water storage tank (10), and a water conveying apparatus (11). The energy-efficient continuous sludge resource processing system is capable of continuously processing sludge, the finally produced dried sludge can be used as greening soil or a fertilizer; a concentrate separated from the protein liquid separator (9) is the protein liquid which can be taken as the raw material of a foam concrete and a foam extinguishing agent and a shield foaming agent, the separated condensed water can be taken as supplementing water or process water of a whole system, so that stabilization, harmlessness, quantitative reduction and resource of the sludge can be realized; the material flash distillation equipment (7) and the condensate liquid flash distillation apparatus (6) use the high-temperature material and high-temperature condensed water for negative-pressure flash evaporation to generate steam to preheat mixed sludge, system efficiency is effectively increased, energy consumption is reduced, and energy saving is realized.

Description

Technical field [0001] The invention relates to a sludge resource treatment system, in particular to an energy-saving continuous sludge resource treatment system suitable for sewage treatment plants, and belongs to the technical field of environmental protection. Background technique [0002] With the increase of urban sewage treatment rate and the deepening of treatment degree, the sludge output of urban sewage treatment plants is gradually increasing. According to statistics, the annual amount of wet sludge (with a moisture content of 80%) in the country is about 30 million tons, and it is still increasing at an annual rate of 8%-10%. At present, the sludge treatment methods mainly include direct landfill after dehydration, sludge fermentation and composting, sludge incineration and comprehensive utilization. Relevant statistics show that the wet sludge to be treated in urban sewage plants in my country exceeds 10 million tons per year. [0003] Sludge is an extremely com...

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Problems solved by technology

[0006] Both of the above two patents use the method of sludge hydrolysis, but both of them have certain deficiencies. Chinese Patent No. 200910245146.1 is not suitable for continuous treatment of sludge, but only for intermittent batch treatment of sludge, so the required The power and volume of the equipment are large, and the equipment investment is relatively high; although Chinese Patent No. 201010208864.4 has realized the continuous treatment of sludge, the residual pressure and heat of the whole set of equipment are not well utilized, and the direct production of foam concrete faces many limitations. There is still a certain gap between the waste of energy and the requirements of energy conservation and environmental protection

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