A two-stage series heat pump sludge dryer

Abstract

The invention provides a two-stage series type heat pump sludge drying machine, relates to sludge heat pump drying equipment and aims to solve the problems that with the adoption of existing heat pump sludge drying techniques, the temperature of circulating air cannot be increased while the humidity of the circulating air entering a drying chamber is reduced, the drying and dampness removal capacity is poor, and energy efficiency is low. The drying machine comprises a drying chamber, a two-stage series type heat pump system, a heat regenerator, a cooling device, a blower and a condensate water collecting and discharging device, wherein a first-stage evaporator and a second-stage condenser are in series connection in a sealed air circulating pipeline of the drying machine; inflow air at the heat end of the heat regenerator is sent from an outlet end of a filter in the drying chamber, outflow air at the heat end of the heat regenerator is sent to the cooling device, inflow air at a cold end of the heat regenerator is sent from the first-stage evaporator, and outflow air at the cold end of the heat regenerator is sent to the second-stage condenser; the blower is located below the second-stage condenser, pressurizes the circulating air and sends the circulating air to the drying chamber; the condensate water collecting and discharging device is located below the heat regenerator, the cooling device and the first-stage evaporator. The drying machine is used for drying sludge.

Description

technical field [0001] The invention relates to a sludge heat pump drying equipment, which belongs to the technical field of drying machinery and equipment. Background technique [0002] In the process of recycling the sludge in the water treatment process, the removal of moisture in the sludge has always been a problem in the industry. The low-temperature thermal drying technology represented by the heat pump sludge drying technology is a better sludge treatment method. , can significantly reduce the volume of sludge, the product has stable properties, no odor and no pathogenic organisms; the sludge product after drying treatment has many uses, and can adapt the sludge characteristics to the needs of a wider range of treatment and disposal processes. A sludge treatment method worth promoting. [0003] The heat pump sludge drying technology is limited by the drying temperature, and its stand-alone capacity still needs to be improved. At present, the conventional heat pump ...

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Problems solved by technology

[0004] The present invention proposes a two-stage series heat pump sludge dryer, in order to solve the problems that the existing heat pump sludge drying technology can not increase the temperature of the circulating air while reducing the humidity of the circulating air entering the drying chamber, and the drying and dehumidification ability is poor and the energy efficiency is low.

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