【導(dǎo)讀】管換熱器；填料函式換熱器。固定管板式換熱器由兩端管板和殼體構(gòu)成。由于其結(jié)構(gòu)簡單，運用比。在煉油、化工裝置中換熱器占總設(shè)備數(shù)量的40%左右，占總投資的。近年來隨著節(jié)能技術(shù)的發(fā)展，應(yīng)用領(lǐng)域不斷擴大，利用換熱器進(jìn)。行高溫和低溫?zé)崮芑厥諑砹孙@著的經(jīng)濟(jì)效益。當(dāng)兩流體的溫度差較大時，為了避免較高的溫差應(yīng)力，通常在。殼程的適當(dāng)位置上，增加一個補償圈（膨脹節(jié)）。時，補償圈發(fā)生緩慢的彈性變形來補償因溫差應(yīng)力引起的熱膨脹。較緊湊，排管較多，在相同直徑下面積較大，制造較簡單?？稍跉んw上設(shè)置膨脹節(jié)，以減少因管、殼程溫差而產(chǎn)生的熱應(yīng)力。④、管子腐蝕后連同殼體報廢，設(shè)備壽命較低；目前，由于我國新版GMP的推出，板式換熱將逐漸退出食品，飲料，不銹鋼316L為主體的換熱器，將成為飲料，食品，以及制藥行業(yè)的必選。板，可以有效防止泄漏造成的污染。符合新版GMP規(guī)定，雖價格昂貴，但。觸情況良好，就有較大的傳熱速率。

　　

【正文】 e 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。 coefficient of thermal conductivity and stainless steel equal。 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 brazing method creates a posed of copper and its alloy material of plate fin heat exchanger, used in aircraft engine cooling. At the end of the 3039。s, Sweden also built the first plate shell type heat exchanger, used for pulp factory. During this period, in order to solve the strong corrosive medium heat transfer problem, the new material made of heat exchanger began to pay attention to. Plate type heat exchanger 60 time around, because the rapid development of space technology and cuttingedge science, urgent need of various energy efficient pact heat exchanger, plus the stamping, soldering and sealing technology development, heat exchanger manufacturing technology has been further improved, so as to promote pact plate type heat exchanger and the vigorous development of broad application. In addition, since the beginning of 6039。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