SISIC recuperator is short for silicon carbide recuperator. In some countries people usually call it as RBSIC recuperator, RBSIC heat exchanger, SIC recuperator, SIC heat exchanger or ceramic recuperator, ceramic heat exchanger. In some industries, people desicribe it as SIC radiant tube, SIC burner tube.
Silicon carbide recuperators are with good strength, temperature resistance and high thermal conductivity. SISIC recuperator is a new type of heat exchanger that uses silicon carbide ceramic material as the heat transfer medium. Because SIC ceramics have excellent characteristics such as corrosion resistance, high temperature resistance, high thermal conductivity, high hardness, and wear resistance. RBSIC recuperators are suitable for use in high temperature and corrosion resistance environments.
SIC recuperator is a new type of silicon carbide engineering ceramics, which has excellent performance of high temperature resistance and thermal shock resistance. It is air-cooled from 1000 ℃ to room temperature, and no cracks appear after more than 50 cycles; thermal conductivity It is equivalent to stainless steel; it has good corrosion resistance in oxidizing and acidic media. The structure successfully solved the thermal compensation and the gas sealing problem. The device has high heat transfer efficiency and significant energy saving effect. It can be used to preheat the combustion air or heat the process gas of certain processes, which can save primary energy, and the fuel saving rate can reach more than 30%. It can strengthen the process and significantly increase the production capacity.
Ceramic recuperator is a new type of heat exchange device developed to replace metal heat exchangers and solve the defects of unreasonable long-term operation in high-temperature flue gas and the need for cold air to reduce the use effect. The heat exchanger made of this material is a replacement product of high-temperature flue gas waste heat recovery in the world. The tubular silicon carbide insert high temperature heat exchanger has a compact structure and a large heat exchange area per unit volume. It is compressed by an internal spring to absorb thermal expansion. When the flue gas temperature is 1300°C, the air preheating temperature can reach 600°C or more. The interface part of the heat exchanger adopts corresponding technology to reduce vibration and strengthen sealing to reduce air leakage. The air leakage rate is less than 5% of professional requirements.
The silicon carbide heat exchanger is composed of a number of air passages with a square cross-section and a rectangular flue gas passage cross-section of silicon carbide tubes glued together in a crisscross pattern. The air passage and the flue gas passage are double-layered, with a firm structure and high With high mechanical strength, it solves the phenomenon of cracking and easy air leakage of the corrugated ceramic heat exchanger separator. Four L-shaped seals are glued at the junction of the air and flue gas channels. The shell is made of steel plate, and the middle is filled with aluminum silicate refractory fiber, which plays a role of sealing, heat insulation and anti-mechanical vibration. The air inlet and outlet discs are internally connected, and the cold and hot air generate a steady flow in the connecting pipe, and the flow rate is stable. The heat exchanger can be widely used in the recovery of flue gas in various industrial furnaces and is an ideal energy-saving device.
The silicon carbide radiant tube (high-temperature ceramic heat exchanger) is characterized by a refractory ceramic heat exchange tube made of a tube disk with a tube length of 380-1600mln. The joint disk of the tube is square, octagonal or polygonal, and the joint seam is stepped. Or flat joint, the middle of the pipe fitting is provided with a refractory hoop, and the pipe fitting is glazed. When the heat exchanger is built, the top and bottom layers are sealed by pouring. The ceramic heat exchanger constructed in this way has high air tightness and high heat exchange efficiency, and the air leakage rate is at least 50% lower than the original, which can double the service life of the heat exchanger, thereby extending the service life of the furnace.
It is characterized in that the joint of the ceramic heat exchange tube and the tube body are integrated. The joint adopts a “U” groove plug-in sealing structure, which can effectively prevent the higher pressure preheated medium from leaking into the lower pressure preheated medium. It can be used in high-temperature industrial furnaces such as soaking furnaces and large continuous heating furnaces in iron and steel enterprises, vertical tank zinc distillation furnaces and tower zinc rectification furnaces in non-ferrous metallurgical systems, to recover flue gas waste heat at 1000-1400°C and air preheating The temperature can reach 800℃ and the fuel saving rate is 40%.