Energy-saving and environmental protection is an important contemporary issue of global concern, energy conservation, improve energy efficiency as a basic national policy in the national "Eleventh Five-Year Plan". The most direct benefits of energy-saving for enterprises is to save costs, improve economic efficiency and enhance market competitiveness. Refers to the use of waste heat without being able to make use of thermal energy. Because of China's industrial equipment behind, low energy efficiency. Such as chemical, petrochemical, building materials, textile, metallurgy, power, food, paper, electronics and other industries, there is a lot of heat directly emptying a waste of energy and pollute the environment in production. Waste heat recovery is to utilize waste heat recovery, improve energy efficiency, reduce production costs and protect the environment. Heat pipe heat recovery unit works: heat pipe heat recovery system is the main heat conductive elements, with the ordinary heat is essentially different. Heat pipe heat recovery heat exchanger efficiency up to 98%, which is unmatched by ordinary heat. Heat pipe heat recovery unit is small, just an ordinary heat exchanger 1/3. High temperature flue gas emissions from left channel, when the high temperature flue gas emissions heat pipe erosion, when the flue gas temperature> 30 ℃, the heat pipe is activated automatically transfer heat to the right, then left endothermic heat pipe, high temperature gas flows through the heat pipe after temperature drop, heat conduction and the heat absorbed by the tube to the right. Often 温清洁 air (or other aqueous medium) under the effect of the blower, flow in opposite directions along the right channel erosion heat pipe, then the right side of the exothermic heat pipe, the clean air (or other aqueous medium) is heated, after the air flows through the heat pipe temperature. Waste heat recycling a lot of ways: one, in general, the best utilization of waste heat; followed by the direct use; the third is the indirect use (to produce steam to generate electricity). 2, rational use of waste heat steam sequence is: power heating in combination; generating heat in combination; the production process uses; life use; condensing power generation. 3, the rational use of waste heat hot water order is: for perennial production process; return boilers and electricity use; live with. 4, the rational use of waste heat air sequence is: production; HVAC; power use; power generation. Waste heat recovery technology and recovery methods: a separate type heat pipe heat recovery technology; 2, the overall heat pipe heat recovery technology; 3, waste heat recovery systems: different waste heat recovery design and methods, may bring different results, namely recycling The heat quantity or amount of steam is completely different. Performance characteristics of heat pipe heat recovery unit: 1, high security and reliability: the conventional heat transfer equipment are generally partitions heat, hot and cold fluid on each side wall of the flow, such as the wall or walls have leaked, then will result in lost production. Heat pipe heat recovery device is a secondary heat exchanger partition that you want to spread heat Ling fluid through the heat pipe evaporator and condenser section of wall to wall. 2, heat pipe heat recovery unit high heat transfer efficiency, energy-saving effect is remarkable. 3, the heat pipe heat recovery has good corrosion resistance. Heat pipe wall temperature can be adjusted by an appropriate transformation of the heat pipe heat pipe wall temperature adjustment above the dew point of the cryogenic fluid, thereby preventing the dew point corrosion, ensure equipment the long run. Due to the dew point to avoid the smoke, so that dust is not easy to bond on the ribs and the wall. At the same time will produce heat pipe thermal self-vibration, the ash is not easy to stick to the wall and fins, and thus will not block ash. 4, installation and structural layout flexibility: heat pipe heat recovery device is installed without changing the original process systems, structural design and location of the layout is very flexible and can adapt to a variety of complex applications. 5, long life: life in more than 10 years, a single removable heat pipe replacement, low maintenance cost 6 simple payback period is short: usually six months to a year all the investment can be recovered.