Sludge drying-incineration integrated system and use method

Abstract

The invention relates to a sludge drying-incineration integrated system and a use method. The system comprises a sludge drying-incineration processing loop, a steam heating circulation loop, a hot-water heating circulation loop, a heatpump subsidiary heating loop and a carrier gas heating and waste heat recovering loop, wherein the sludge drying-incineration processing loop comprises a dry sludgebackmixing device, a steam-heating sludge dryer, a hot-water heating sludge dryer and a sludge incinerator; the steam heating circulation loop comprises a water pump I, the steam-heating sludge dryerand the sludge incinerator; the hot-water heating circulation loop comprises a condenser, a water pump II and the hot-water heating sludge dryer; the heatpump subsidiary heating loop comprises an evaporator, an internal heat interchanger, a compressor, a throttle and the condenser; and the carrier gas heating and waste heat recovering loop comprises an air compressor, the evaporator, the sludge incinerator, the steam-heating sludge dryer and the hot-water heating sludge dryer. The invention can be widely applied to fields of various sludge processing.

Description

technical field [0001] The invention relates to a sludge disposal system and a use method, in particular to a sludge drying and incineration integrated system and a use method applied to sludge treatment. Background technique [0002] At present, as of October 2008, 1,459 sewage plants have been built nationwide, with a daily processing capacity of 85.53 million tons and a corresponding dewatered sludge volume of 85,530 tons per day. One of my country's national conditions is that the population density is high, which is three times the world average. Especially in economically developed areas, the population density is higher, and the scale of sewage plants is also larger than that of the same period last year. The problem of land shortage is more prominent. For these areas, pollution The first and foremost issue with mud is minimizing weight. The technologies for the greatest reduction are drying, semi-drying, and incineration. Considering the economy of investment and op...

AI Technical Summary

Problems solved by technology

Simply combine the heat pump and the sludge dryer to form a heat pump drying device to dry the thermal system of the sludge. Due to the influence of poor system sealing and heat insulation, the heat pump is used to recover waste heat to maintain the continuous drying, and the evaporation temperature is low, or Insufficient heat energy, and the use of environmental media (sewage, air) as a low-temperature heat source has the disadvantages of low grade heat source and low heat pump coefficient

However, due to the low calorific value of sludge in the pure sludge incineration and drying technology, in order to maintain the continuous drying and incineration, fuel must be added, which makes the operating cost too high

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