Sludge low-temperature drying and dehumidifying system

Abstract

The invention discloses a sludge low-temperature drying and dehumidifying system which comprises a drying box, a low-temperature heat pump system, and a fan; the drying box is provided with a sludge distribution crawler belt and a sludge discharge port; the low-temperature heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve, an air inlet of the evaporator is communicated with an air outlet of the drying box, and the evaporator, the compressor, the condenser and the throttle valve form a low-temperature heating circulation loop through refrigerants; the fanis used for conveying dry and hot air exhausted from the condenser into the drying box; the sludge distribution crawler belt can discharge dried sludge from the sludge discharge port. The whole systemis carried out in a low-temperature environment, sludge can be rapidly dried, bad peculiar smells generated during sludge drying are avoided, the system is environmentally friendly, all devices in the system are high in automation degree, water in the sludge can be safely and efficiently absorbed, the dried sludge can be conveniently recycled, and the utilization rate of resources is increased.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge low-temperature drying and dehumidification system. Background technique [0002] At present, a large amount of solid waste is produced during the production and processing of electronic circuits, accounting for more than half of the waste generated by the entire electronics industry, the most important of which is the pollution produced by PCB manufacturing enterprises. In order to actively promote enterprises to do a good job in reducing emissions at the source and related energy-saving and consumption-reducing systems, improve the environmental quality of enterprises, and reduce the production costs of enterprises, enterprises will establish corresponding sewage treatment plants. Sludge is an important by-product of sewage treatment. The daily production volume It is also increasing rapidly. If it is not handled properly, it will cause secondary pollution to ...

AI Technical Summary

Problems solved by technology

[0003] In the production of PCB enterprises, enterprises usually use electric heating and drying to reduce the moisture content of sludge. When facing a large amount of sludge, it is necessary to use a larger power electric heater or even multiple electric heaters to work at the same time In order to barely reduce the moisture content of the sludge to the corresponding standard, however, this treatment method not only consumes a lot of energy, but also easily produces a large amount of odor at high temperature, polluting the environment

In addition, electric heaters are prone to safety accidents such as dry burning, short circuit and fire under high-load work.

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