Domestic sewage turned heating source

In addition to domestic sewage into the sewage treatment plant, what value can be used? Recently, in the North Third Ring Road in Xi'an City, Lee Jun-future city to see the magical scene, the sewage turned into an essential heating for the district baby. It is understood that the future city of Lijun is the city's first residential area with sewage heating.
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Most residents are satisfied with the heating effect
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According to "Xi'an City Central Heating Management Regulations" provisions of the heating period of the central heating enterprises to ensure that central heating users to maintain indoor temperature 182, not less than 16. In the afternoon of recently, most of the residents in the district were satisfied with the effectiveness of heating by this waste utilization method.
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"Our home temperature is basically maintained at 20 or more, to be indoors a thin sweater enough, too hot at night, we have to open the window breathable it." Living in Building 18, Miss Wu Home bought a special indoor thermometer this year, in order to monitor the indoor temperature at any time compliance. Mrs. Wu also raised his finger to point to his home, looked up, many of the windows of this building are half open.
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Is this resident really good? With an electronic thermometer came to the second floor of Building 7, 14th floor, knocked on the door of an owner, I saw Mr. Dong wearing a vertical striped warm shirt. "My family did not dare to heat anymore, so I'm opening a two-bedroom window for fresh air now." Mr Tung left the window from the house in the morning until about 3 pm on the same day and the windows were always open At this point, the thermometer shows the room temperature is 22.6-22.9.
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Sewage source heat pump is how heating?
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According to reports, this heating method is used in the traditional heat pump form, that is, sewage source heat pump heating. Sewage source heat pump heating in the form and the traditional municipal central heating What is the difference? The project implementation unit official said that the sewage source heat pump heating is not directly to the sewage heating, but extract the sewage 3-5, as a heat pump unit heat sink, heat pump unit through the energy conversion, the softened tap water warmed to about 50, through Heating pipeline to the households to warm the pipeline. Therefore, the hot water entering the home is softened and heated tap water, and municipal heating is the same as the end of the water. Heat pump room installed in the basement of the district (the original heat transfer station location), a professional staff to maintain.
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"The municipal sewage discharged into the underground pipe network has its own temperature, and in winter, the temperature of the winter sewage in Xi'an is kept at 13-18, which is the ideal heat source for the heat pump system." The project leader in charge of the project continued to explain that the introduction of sewage Dedicated tube heat exchanger, the sewage temperature will be passed to the clean water, and sewage will be discharged back to the main canal, then the principle of heat pump unit is the use of refrigerant liquid - gas - liquid cycle changes in the principle of heat and heat absorption, warming After the building heating. Specifically, in the process of heat exchange, except for the change of temperature of water, neither water resources nor water quality deteriorate.
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The person in charge also said that the system uses the advanced domestic sewage heat extraction device, with a number of "domestic initiative, leading technology," advanced technology to ensure continuous and stable operation of the system for the supply and return water temperature maintained at 50-40, Is an effective supplement to the city's central heating.
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You can save 3/4 operating costs
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Extracting heat from sewage can not only reduce pollution, but also save energy. The person in charge of the project pointed out that when the sewage source heat pump is heating, it only needs to consume a little electric energy, eliminating the boiler room system of coal, oil, gas and the like, without the combustion process and avoiding the air pollution caused by the exhaust smoke. With the sewage source heat pump system, each ton of sewage obtained by the use of heat, equivalent to burning 1 kg of standard coal produced by the heat. He calculated the sum of 1 tonne of water from 15 to 45, which required 30,000 calories. If it takes 6.9 kg of standard coal for heating coal and 4.2 for natural gas (about 5 kg of coal equivalent), the direct electricity needs 35kwh (folded into coal about 12.3kg), while the sewage source heat pump only consumes 8.7kwh (folded into standard coal about 3kg). Sewage source heat pump is cheaper than direct electricity heating 3/4. "China produces 80 billion tons of sewage every year. If a sewage-source heat pump system is used, it will provide 25% of the city's buildings with central heating and will save 75 million tons of standard coal per day."