【正文】 ually used or only as humidification equipment use. However, in order to regulate the humidity for the primary purpose of the textile factory, cigarette factory is still widely used! ( 3) jet heat exchanger In this device, the high pressure fluid from the nozzle, forming a high velocity, low pressure fluid is introduced into the mixing chamber and jet direct contact heat transfer, and feeding into a diffusion tube, the diffusion tube exit to achieve the same pressure and temperature to the user. ( 4) mixing condenser The device is usually the water and steam in direct contact method to make steam condensate. The regenerative heat exchanger heat storage type heat exchanger used for regenerative heat exchange equipment. With solid filler, used to store heat. General refractory brick brick fire plaid ( sometimes with metal wave band ). Heat transfer in two stages. The first stage, the hot gas through the lattice, the heat is transferred to the fire and save up lattice. The second stage, cold gas through the lattice, lattice savings by fire heat emitted by heating. The two phase alternating. Usually with two regenerator used alternately, whereby when the hot gas into a reactor, cold gas into another device. Commonly used in the metallurgical industry, such as the open hearth furnace regenerator. Also used in chemical industry, such as gas furnace air preheater or bustion chamber, synthetic oil plants in the heat accumulating type cracking furnace. The regenerative heat exchanger is generally used on medium mixed with low requirements. Ceramic ceramic heat exchanger heat exchanger is a kind of new type high temperature heat energy recovery device, main ponent is silicon carbide, can be widely used in metallurgy, machinery, building materials, chemical industry, recycling all kinds of industrial furnace directly discharged 8501400 high temperature flue gas waste heat, in order to obtain high temperature bustion air or gas. Research into the device to the heat transfer element material is a new type silicon carbide ceramic works, it is resistant to high temperature and thermal shock performance, from 1000 degrees C air cooled to room temperature, repeated 50 times over the cracks do not occur。s, in order to adapt to the high temperature and high pressure conditions of heat transfer and energy conservation needs, typical of the shell and tube type heat exchanger has been further development. In 70 time metaphase, in order to enhance heat transfer, in research and development of heat pipe on the basis of creating a heat pipe type heat exchanger. Heat exchanger according to the mode of heat transfer can be divided into different hybrid, regenerative and wall type three class. Mixed type heat exchanger is through the cold, hot fluid, mixed direct contact heat exchange heat exchanger, also called contact type heat exchanger. Due to the two fluid mixing heat exchange must be timely separated, this kind of heat exchanger is suitable for gas, the liquid between the two fluid heat exchanger. For example, chemical plant and power plant in cold water tower, water from top to bottom spray, and the cold air from the。 in oxidative and acidic medium has good corrosion resistance. The structure solves successfully the thermal pensation and can solve the problem of gas sealing. The device has high heat transfer efficiency, obvious energy saving effect, is used to preheat the bustion air or heating some process gas, can save energy, fuel saving rate up to 30 %55%, and strengthen the process, significantly improving production capacity of. Ceramic heat exchanger production technology and kiln production process is basically the same, thermal conductivity and oxidation resistance is the main application properties of materials. It is the principle of the ceramic heat exchanger placed in the flue outlet is near, high temperature areas, without the need for mixing cold and heat protection, when the furnace temperature 12501450 C, a flue outlet temperature shall be 10001300 C, ceramic heat exchanger heat recovery can reach 450750 C, to be recycled into the hot air in the kiln with gas formation of mixed gas bustion, so to reduce production costs, increase economic benefits. Ceramic heat exchanger in metal heat exchangers using constraints to get very good development, because it is better to solve the corrosion resistance, high temperature resistance and other topics. Its main advantages are: good thermal conductivity, high temperature strength, good thermal shock resistance, oxidation resistance. Long service life, small amount of repair, stable and reliable performance, simple operation. Development history Plate heat exchanger plate heat exchanger in twentieth Century 20 time appear, and the application in food industry. Escrow to board made of heat exchanger, and has the advantages of pact structure, good heat transfer effect, thus gradually developed into a variety of forms. At the beginning of 30 time, the first Swedish made of spiral plate heat exchanger. Then the b