Gas-fired graphite type drying furnace design Lv Zhigang National Machinery Industry Bureau Design and Research Institute, Tianjin 3001901 Document identification code ugly 1 刖 Lu Meizhen 4 team casting, limited to 4 existing graphite casting 甩 drying é€ using electric heating, Datong In March 1997, Aibiyu Casting Co., Ltd. wanted to build an electric heating type graphite casting drying tunnel. According to the actual situation of the company's energy, we have proposed that the burning company should listen to it, based on the opinions of all parties. The design proposal proposed by our company was contracted by the Design and Research Institute of the National Machinery Industry Bureau. It was responsible for the design and construction of the juice manufacturing and construction. The structure of the furnace and the design of the combustion system were designed by the French company Stein and the Japanese and foreign furnace companies. The mature and advanced heated full-radiation top of the model. The graphite mold is divided into upper box graphite type and lower box graphite type. The graphite casting type drying tunnel is divided into two upper box drying tunnels and two lower box drying. 2.1 The upper shell structure is based on the graphite type heating characteristics. The design features of the upper casing 21.1 The upper casing is provided with an insulation layer 205, and the furnace temperature is heated to 300 or more by the burner and the far-infrared plate. If the upper casing is not insulated, the heat dissipation of the upper cover is large, which not only causes fuel. Waste, and 1 makes the temperature between the day too high, worsening the labor ring ± actually, so the insulation must be taken on the shell. The cover layer is insulated with a layer of galvanized aluminum plate filled with cold thick gold. Shanghai galvanized aluminum plate for far infrared Reflection function. Yes, strong heat transfer effect on the ink type. Considering the overhaul of the drying tunnel, each of the strip drying tunnels has 18 shells. On each side of the shell, there is a support shell with a pin and two sets of shells. The refractory fibers are softly connected to ensure one shell. The sealing effect of the body has a large gap between the transmission system bracket and the upper casing. We have designed a reflective baffle here. Due to the arrangement of the reflective baffle, the flow of air inside and outside the furnace is blocked, and the reflection of the aluminized plate is utilized. Function, strong heat transfer of the furnace, it. The shell and the graphite-type mesoporous cover form a relatively closed furnace, which can make the graphite profile get high-efficiency heating. The cup-type flat flame burner is the proof of the use of advanced combustion equipment at home and abroad. The flame is disc-shaped, and the temperature is uniform. The life is long. In order to heat the graphite type, the receiving date is 200, 0, 20, and the surface is heated to 10,520 夂, and the capacity of each burner is 16. The galvanized aluminum plate also has the ability to reflect far infrared rays. It is beneficial to the heating speed. It can use the convective heat transfer of the airflow or the far infrared radiation to heat the workpiece, so that the graphite profile can reach the temperature required by the process faster. The gas system is supplied by the main valve of the workshop gas main pipe. The pipe is divided into strip pipes, each pipe is supplied to each burner in a flow direction, and each burner is equipped with an adjusting ball valve. Each of the strip heating lines is provided with a blower for supplying combustion air. The air branch pipe is supplied to each burner in sections along the flow direction, and each burner is provided with an adjustment valve. Ignition using manual operation 1 burner 2 furnace shell 3 reflection baffle 4 rotating device 5 transmission system 6 pipe 7 conical automatic sand collecting device 3 distribution of smoke exhaust system design furnace gas combustion after flue gas overflow into the workshop It will seriously pollute the working environment of the workshop. Therefore, it is necessary to set up the exhaust system of the exhaust system. For each graphite type, the bottom of the heating housing is provided with a exhaust pipe to enter a branch, and each branch is integrated into the main smoke. The road is arranged from the chimney. In order to facilitate the clearing of the sand and facilitate the exhaust, a cone-shaped automatic flow opening is installed in the lower part of the transmission.
4 Traditional system design The traditional system consists of several independent roller tables with transmission mechanisms. The structure of the roller table is composed of the bracket sprocket motor reducer and the chain. The structure of the transmission system is simple, which is convenient for the existing installation and future transformation; the bearing capacity is strong; the whole transmission system is periodically operated, every 3, å graphite The type moves along the path of the stick to move the 1.61 chain to install a limit switch to achieve a graphite type heating of the table burner. The preheated graphite type is combined with the upper box graphite type and the lower box graphite type by the box-carrying machine, and then the economical comparison of the transmission system to the casting and casting process area. Datong Aibiyu Casting Co., Ltd. is a Sino-US joint venture. Enterprises, by Datong Locomotive Works and Americans 8, Hui, Xing Xun, Jingxian City, Office, the main equipment relies on the US import and localization to transform the graphite casting oven part, and the American 80 Casting Co., Ltd. uses electric heating This time, we use the gas-fired preheating graphite type, the main advantages are as follows: in order to meet the requirements of the process, the electric heating type drying channel energy is more economical; the drying preheating 220 graphite type calculation, The electricity consumption of the electric heating drying tunnel is 3,800 jia, and the consumption of the furnace gas is 3,300 m3. The operating cost is saved. 233 ink-type heating surface temperature is uniform, the heating speed is fast, the oxidation of graphite is reduced, and the use of graphite type is prolonged. For the low-temperature electric heating furnace, it is possible to use a fan to promote the flow of air to enhance the convective heat transfer to the oven, which increases the investment and complicates the furnace structure. . Each gas burner has a graphite type heating, and the high temperature flue gas generated after the combustion of the furnace gas rushes the graphite surface to form a strong convective heat transfer and far infrared heating of the far infrared radiation plate, so that the graphite type Productivity operation effect measurement compared with foreign similar type furnace 1 burning furnace gas power port heat heating time production capacity h unit cost yuan cold furnace temperature, walking time 46.812 glass furnace oven Zhou Wenyi 1 Hunan Changling refinery chemical factory , Hunan Yueyang 41402 Shao.
Our factory's catalyst raw material project 46.8,12 glass melting furnace was built at 98ä¹9, and its refractory material was built in December. There are mainly glass melting pool, small furnace regenerator, exhaust system, part of the glass melting pool, and the masonry material used for the pool. The bottom layer is layered, the bottom layer is kaolin brick, the first layer is ramming material, the first layer is 25 bricks, the first layer is ramming material, the uppermost layer of the first layer is 3 zirconium corundum brick; the furnace pool chest wall is 3 Zirconium corundum brick; Dahe working part chest wall is made of high quality Guiyu small furnace. The masonry material used for the 33 wrong corundum brick regenerator is the upper wall and the top is high quality brick. The part is a clay brick, and the lattice brick of the interior of the heat storage room is a high-purity magnesia brick. The masonry material used in the flue is clay brick stove. Received 210 heart 006 externally built with insulation bricks. The melting part of the furnace is designed to have a temperature of 1500. The temperature is 1400. It mainly produces water glass, which is a thermal production of continuous production. After the equipment glass furnace is built, the oven must first be used to remove the physical water and crystal water in the masonry, complete the expansion and stress relief caused by the phase change of the refractory material, so that the masonry can achieve good combination and combustion, and work for the pond. be prepared. The quality of the oven is not only related to the influence of the furnace. If the oven is improper, it is easy to cause local temperature rise too fast, and the kiln body expands +. Peel off a masonry. It causes local leakage and damages the furnace in advance, so the work of the oven is very important.
2 furnace masonry engineering quality 2.1 raw material quality sticky brick 屯 屯 刚 刚 刚 烧结 烧结 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该 该Economic benefits, all kinds of performance indicators are better than the same type of electric heating graphite type ovens abroad, no domestic reports, have a certain originality
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