Air source heat pump system for sludge drying and its sludge dryer

Abstract

The invention discloses a sludge drying machine which comprises a compartment, wherein the compartment is internally provided with a conveyer belt for conveying sludge; a feeding hole and a discharge hole are respectively formed in the upper end and the lower end of the compartment; the compartment is arranged in a sealed manner; a guide fan for driving air to form a heat stream is arranged at one end opposite to the feeding hole, of the conveyer belt; a heating part for heating the air is arranged at one end close to the guide fan, at the lower end of the conveyer belt; an evaporator for recycling wastewater in hot and damp air is arranged at one end far away from the guide fan, at the lower end of the conveyer belt; a partitioning plate for guiding the heat stream to flow to the evaporator is arranged on one side back to the guide fan, on the inner wall of the compartment; a water discharge tube is connected with a liquid outlet of the evaporator; a diversion fan for leading the heat stream to the heating part from the evaporator is arranged between the evaporator and the heating part. As the compartment is sealed, the air flow forms sealed heat circulation inside the compartment, as much heat as possible can be adopted to dry sludge, instead of being discharged into the air directly to cause heat loss, and thus the energy utilization rate can be increased.

Description

technical field [0001] The invention relates to sludge treatment equipment, in particular to a sludge drying air source heat pump system and a sludge dryer. Background technique [0002] At present, after preliminary centrifugal treatment, the water content of the sludge is about 80%. The water content of the sludge is too high to be directly incinerated. It needs to be dehydrated and dried to reduce the water content before it can be recycled. The process of sludge drying is generally completed by high temperature heating or natural drying. [0003] For example, the patent with the notification number CN101148309 discloses a belt sludge dryer, which includes a box body, and an upper conveyor belt, a middle conveyor belt and a lower conveyor belt are arranged inside the box body. The , middle and lower conveyor belts respectively include shaft wheels and conveyor belts arranged at both ends, the conveyor belt is installed on the shaft wheels, and the shaft wheels drive the ...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of this patent is that in the process of drying sludge, a large amount of hot and humid air will be discharged, so it is necessary to supplement natural wind and hot air all the time to maintain the working temperature in the box

However, when the hot air is heated to a temperature that can maintain the cabin at the working temperature, a large amount of heat is required, that is, a large amount of energy is consumed.

Lead to low energy efficiency and high cost

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