Sludge is a byproduct of sewage treatment, is extremely complex heterogeneous body made of an organic debris, bacteria, bacterial, inorganic particles, colloids and other components. The amount of sludge is usually 0.3% -0.5% (volume) of the amount of sewage or about 1% to 2% (by mass) of sewage treatment capacity; if they are deep treatment, sludge volume will increase 0.5-1 times. Wastewater treatment efficiency, will inevitably lead to an increase in the number of sludge. Our current sewage treatment capacity and treatment rate is not very high (4% -5%), but the city sewage treatment plant of approximately 300,000 tons of dry sludge discharge air source heat pump water heater energy efficiency every year, but also about 10% a year growth. Sludge drying process in China has just started, the existing sewage treatment facilities in the country in the stability of sludge treatment equipment is less than 1/4, the treatment process and facilities more perfect not to 1/10. As the state and society for the strengthening of environmental protection, the government invested heavily in sewage sludge treatment and seek between environmental protection, social and economic benefits of the three to find a balance. Simply using the heat pump in heating, hot water or hot air. Temperature is below 80 degrees, energy efficiency can reach 300%, at least 80 to 100 degrees will be reduced to 150%. In any case are very efficient heating methods, not to mention the United States coupled with the cooling efficiency air heat pump hot water units, overall energy efficiency is quite high. In the south of the Yangtze, a year 10 to 11 months, the room temperature is above 10 degrees, the workshop phase conditions has been issued for a good heat source. In the north or northeast, year 3 to 5 months of cold weather, can not provide the required high efficiency heat pump, solar collectors Yunnan then air-source heat pump water heaters, produce 10 to 20 degrees of cold water, With the heat pump and the temperature raised to life at home temperature heat source such costs and equipment costs are not high, it is a very good conservation. In particular, can significantly reduce the energy required for heating costs on industry. From the above chart shows, efficiency and low temperature solar heat device 20 degrees or less than 90% absorption efficiency of showing its use. German city heat pump water heater | air source heat pump water heaters | Han Yue Yue Han Technology provided by the Henan Science and Technology Co., Ltd. Road Zhiyuan, temper forward. Henan Yue Han Technology Co., Ltd. (www.hnlyjd.com/) aims to become and you win symbiosis, strategic partners to move forward, more determined to become electronic, electrical products processing of the most influential companies, together with you leap, common success!