Heat pump type belt type low-temperature sludge drying machine

Abstract

The invention provides a heat pump type belt low-temperature sludge drying machine which comprises a machine body, a drying room and a heat pump system are arranged in the machine body, a first conveying belt and a second conveying belt are arranged in the drying room, and a first air duct used for communicating the drying room with the heat pump system is arranged in the upper-layer space of the machine body. A circulating fan for sucking warm and humid air in the drying room into the heat pump system is arranged in the first air duct, a second air duct for communicating the drying room with the heat pump system is arranged in the lower-layer space of the machine body, a first air inlet and a second air inlet which are communicated with the second air duct are formed in the side wall of the drying room, and the first air inlet is formed between the first conveying belt and the second conveying belt; and the second air inlet is formed below the second conveying belt. According to the heat pump type belt type low-temperature sludge drying machine, the first air inlet and the second air inlet are formed in the side wall of the drying room, so that the temperature and the moisture unsaturation degree of hot air passing through the first conveying belt and the second conveying belt are the highest, and evaporation of moisture on the surface of sludge and diffusion of moisture in the sludge are promoted to the maximum extent.

Description

technical field [0001] The invention relates to the technical field of sludge treatment equipment, in particular to a heat pump type belt-type low-temperature sludge dryer. Background technique [0002] In recent years, with the continuous improvement of the country's requirements for sludge reduction, resource utilization, stabilization and harmlessness, the final disposal methods of sludge are limited to land use and incineration, but land use has high requirements for sludge components. More of the manufacturers adopt the incineration method of disposal. Sludge incineration requires the sludge to maintain a high calorific value, so it puts forward strict requirements for the previous sludge reduction, that is, the calorific value of the sludge cannot be reduced. In view of the above policy and program requirements, sludge drying technology has stood out in recent years and has been widely recognized in the market by virtue of its advantages of no addition in the process,...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: in order to overcome the high moisture content of the wind in the small cycle of the double cycle in the heat pump type belt sludge dryer in the prior art, which leads to the high working pressure of the condenser and the It is always in a positive pressure state, while the heat pump system is always in a negative pressure state, which leads to the problem of low working efficiency of the sludge dryer. The invention provides a heat pump type belt low temperature sludge dryer

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