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Sludge drying system and drying process based on sewage source heat pump

A sewage source heat pump and sludge drying technology, which is applied in dehydration/drying/concentrated sludge treatment, sludge treatment, water/sludge/sewage treatment, etc., can solve the problem of occupying land resources, serious environmental secondary pollution, etc. problems, to achieve the effect of improving drying efficiency, saving energy, and improving production efficiency

Inactive Publication Date: 2019-05-10
CHINA THREE GORGES UNIV
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Problems solved by technology

Landfill will occupy a large amount of land resources and cause serious secondary pollution to the environment

Method used

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  • Sludge drying system and drying process based on sewage source heat pump

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Embodiment Construction

[0022] like figure 1 Among them, a sludge drying system based on a sewage source heat pump includes a sewage circulation device. The sewage circulation device includes a sewage tank 1, a sewage pump 3 and a sewage heat exchanger 4. The water outlet of the sewage tank 1 is connected to the sewage pump 3. The sewage output by the sewage pump 3 is returned to the sewage tank 1 through the sewage heat exchanger 4. Specifically, the first inlet of the sewage heat exchanger 4 is connected to the sewage pump 3, and the first outlet is connected to the sewage tank 1; including an intermediate water circulation device, an intermediate The water circulation device includes a water pump 13, and the water pump 13 transports the intermediate water to the sewage heat exchanger 4. Specifically, the water pump 13 is connected to the second inlet of the sewage heat exchanger 4, and the intermediate water outlet of the sewage heat exchanger 4 is connected to the outlet of the evaporator 5. The ...

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Abstract

The invention provides a sludge drying system and a drying process based on a sewage source heat pump. The drying system comprises a sewage circulating device, an intermediate water circulating deviceand a heat pump circulating device, the sewage circulating device comprises a sewage tank connected with a sewage pump, sewage discharged by the sewage pump returns into the sewage tank through a sewage heat exchanger, the intermediate water circulating device comprises a water pump for conveying intermediate water to the sewage heat exchanger, an intermediate water outlet of the sewage heat exchanger is connected with an evaporator, a water outlet of the evaporator is connected with the water pump, the heat pump circulating device comprises a working medium pump and a condenser, a working medium of the evaporator is conveyed to the condenser through the working medium pump to release heat, a working medium outlet of the condenser is connected with the evaporator, air flows through the condenser and then is conveyed to a belt drier by the aid of a fan, and sludge is dried. According to the system and the process, heat energy of urban sewage serves as a low-level heat source of a heatpump device, hot air is generated and enters the belt drier to dry the sludge, energy is saved, and the sludge is treated.

Description

technical field [0001] The invention relates to the field of urban sludge treatment, in particular to a sludge drying system and a drying process based on a sewage source heat pump. Background technique [0002] With the improvement of the sewage treatment rate, the popularization of sewage treatment facilities and the deepening of the treatment level, the amount of sludge produced by urban sewage plants in my country is increasing at an alarming rate of 10% per year. If these sludges with high moisture content are not treated and disposed of, it will definitely bring new environmental pollution to society and people's lives, and seriously hinder social and economic development. [0003] At present, the treatment methods of sludge in my country are mainly composting, landfill and incineration. Compost is harmful to the growth of crops and even causes food chain poisoning, which is not suitable for large-scale treatment projects. Landfill will occupy a lot of land resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13C02F11/131
Inventor 余万高丹龚棋超
Owner CHINA THREE GORGES UNIV
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