Heat pump technology makes Dalian native sewage into a new energy source

Industrial wastewater and domestic sewage waste to treasure, to replace fossil energy heating and cooling become the "new energy", March 26 reporters from untreated sewage source heat pump understand technology promotion conference, independent research and development of energy-saving air-conditioning plant Dalian Hoko Of the original sewage source heat pump technology for China's building energy-saving emission reduction has opened up a new way.

The principle of this system is to make use of the sewage discharged from the sewer network in the nearby city and take the heat from it in the winter, and then the indoor temperature will be discharged in the summer and taken out of it. At present, the technology has passed the appraisal by a group of experts composed of China Academy of Building Sciences, Dalian Construction Committee and Dalian Municipal Science and Technology Bureau, and has been recognized as "the pioneer in China and internationally advanced with significant social and economic benefits."

Primary sewage mainly includes domestic sewage, industrial waste water and secondary sewage. The quality of the raw sewage is complex, mixed with a lot of contaminants. In response to these problems, Dalian Bao light energy-saving air-conditioning plant developed the world's first automatic sewage decontamination machine and other equipment, not only can effectively filter out the contaminants in sewage, but also the filtered contaminants using heat exchange After the sewage transported back to the sewage canal.

According to reports, in terms of electricity, the primary sewage system energy efficiency ratio of 4.0 above, compared with the large - scale coal-fired boilers a primary energy efficiency of more than 80%, energy efficiency is 3-4 times the electric heating mode, than the traditional central air conditioning The system saves 30% -60% operating costs. In terms of water saving, since the primary sewage heat pump does not require a cooling tower , there is no problem of water evaporation and flooding in summer operation, which saves a lot of water consumption and saves more than 4,000 tons of water in every 10,000-square-meter cooling season. In terms of environmental protection, the original sewage source heat pump belongs to the recycling of waste heat energy, there is no combustion process, there is no discharge of solid waste, toxic and harmful gases and soot, and the "greenhouse effect" is reduced.

In 2007, Friendship Shopping Center Dalian Development Zone Youyi Mall used the original sewage source heat pump air-conditioning system, and used the sewage without any treatment from the sewage pipe of the building accessories as the heat and cold source of the heat pump air-conditioning unit to heat the sewage in the winter to heat the building In summer, heat pump units are used to discharge the waste heat in the building to the sewage in the trunk canal to cool the building. Friendship Group official said that the system, the Friendship Mall in winter to save heating costs 338,000 yuan in summer to save electricity costs 200,000 yuan.

According to experts, China's urban sewage volume is huge. In 2006, the national sewage discharge totaled 53.7 billion tons, and it is estimated that by 2010, it will reach 73 billion tons. At least 3 billion square meters of building heating in winter can be solved if primary heat source heat pumps are used to recover waste heat from these effluents.

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