Mud drying and incinerating integrated system and use method thereof

Abstract

The invention relates to a mud drying and incinerating integrated system and a use method thereof. The mud drying and incinerating integrated system comprises a mud drying and incinerating loop, a hot water circulation loop, a heat pump auxiliary heat supplying loop and a carrier gas heating and waste heat recovering loop; the mud drying and incinerating loop comprises a dried mud back- mixing device, a mud dryer and a mud incinerator on which a slag outlet is arranged; the hot water circulation loop comprises two water pumps, a condenser, the mud dryer and the incinerator; the heat pump auxiliary heat supplying loop comprises an evaporator, an internal heat exchanger, a compressor, a throttle valve and the condenser; and the carrier gas heating and waste heat recovering loop comprises an air compressor, the evaporator, the mud incinerator and the mud dryer. The waste heat recovered from an incinerating and drying device and a heat pump drying device by a heat pump is taken as a heat source, and the heat pump assists in supplying heat, thereby improving the mud drying output and lowering the energy consumption for drying mud. The invention can be widely applied in various mud processing fields.

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 that adopts a heat pump to recover waste heat for auxiliary heating. 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 slime is minimizing weight. The technologies for the greatest reduction are drying, semi-drying, and incineration. Co...

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 the system sealing and poor heat insulation, the heat pump is used to recover waste heat to maintain the continuous drying, and the evaporation temperature is low or the heat energy is insufficient. The phenomenon of using 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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