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Energy-saving closed heat pump sludge drying and dehumidifying system and technology

A sludge and heat pump technology, applied in drying, heat pumps, dryers, etc., can solve the problems of high energy consumption, environmental pollution, and high operating costs, and achieve the goal of reducing energy consumption, not affecting heat balance, and increasing dehumidification capacity Effect

Pending Publication Date: 2019-01-18
JIANGNAN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of high energy consumption, high operating cost and environmental pollution of the existing sludge drying and dehumidification equipment, the present invention solves the problems of the existing sludge drying and dehumidification equipment by adding U-shaped tube heat exchangers, surface coolers and evaporators. Shortcomings

Method used

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  • Energy-saving closed heat pump sludge drying and dehumidifying system and technology

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Embodiment 1

[0031] Such as figure 1 Shown is a closed heat pump sludge drying and dehumidification equipment. The wet sludge exchanges heat with dry and hot air in the drying chamber 11. The wet sludge becomes dry sludge and the dry and hot air becomes humid air.

[0032] Further, the wet sludge molding equipment 15 squeezes the wet sludge into strips and evenly spreads it on the first layer of sludge flat net 12, and moves with the belt 12 of the first layer of sludge flat net 12, The wet sludge exchanges heat and moisture with the surrounding dry and hot air, the water on the sludge surface evaporates, and the water inside the wet sludge penetrates to the surface of the wet sludge. At this time, the surface humidity of the wet sludge in contact with the air is higher than that of the wet sludge The humidity inside the mud is low, and the sludge enters the second layer of sludge flat net 13 through the end of the first layer of sludge flat net 12, because the first layer of sludge flat n...

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Abstract

The invention discloses an energy-saving closed heat pump sludge drying and dehumidifying system and technology, and belongs to the technical field of sludge drying. The system comprises wet sludge forming equipment, a drying room, a moist air circulating fan, a heat pump dehumidifier, a condensed water collecting tank, a dry hot air circulating fan, dry sludge conveying equipment, a conveying device, an evaporator and a condenser. By additionally arranging a surface air cooler, a cooling tower, an intelligent flow valve control system and a U-shaped heat pipe heat exchanger, part of circulating air passes through the U-shaped heat pipe heat exchanger, the surface air cooler and the evaporator during design, and the dehumidification amount of a unit is greatly reduced, so that the dehumidification performance ratio of the unit is higher; the air is circularly used in the drying chamber and the heat pump dehumidifier, tail gas emission is avoided, and pollution to the environment is avoided.

Description

technical field [0001] The invention relates to an energy-saving closed heat pump sludge drying and dehumidification system and process, belonging to the technical field of sludge drying. Background technique [0002] Sludge is an inevitable product after sewage treatment in sewage treatment plants and sewage stations. Untreated sludge entering the environment will directly cause secondary pollution to water bodies and the atmosphere, posing a threat to the ecological environment. Sludge drying and dehumidification equipment is a kind of air that uses high-temperature dry air to flow through the sludge surface to exchange heat and moisture with the sludge, so that the sludge absorbs the heat in the high-temperature dry air and the water evaporates continuously, and at the same time the water vapor is flowed through the air. The equipment taken away; its working principle is: the fan inhales the air in the environment, pressurizes it and sends it into the heating room, after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B15/12F26B21/10F26B25/02F25B30/02C02F11/12
CPCF25B30/02F26B15/12F26B21/10F26B25/02C02F11/12
Inventor 冯小平虞晶燕郭新立向前超蔡璐
Owner JIANGNAN UNIV
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