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(2) According to the experience of technical transformation of the pit furnace, the lightweight silicate silicate fiber-based unshaped refractory prefabricated components are used, and the on-site forming and furnace-forming process improves the airtightness of the furnace to ensure uniform and energy-saving furnace temperature. Instead of the standard size of refractory bricks, changing a certain size during masonry is limited by the shape of the brick. The amorphous aluminum silicate fiber can be arbitrarily set to various sizes, which is very advantageous for technical transformation. The height of the heating chamber of the furnace was reduced by 160mm, and the top of the furnace was changed. R800mm, without any restrictions. It has been confirmed by use that the lightweight aluminosilicate fiber-based amorphous refractory material has the above advantages, and more importantly has the following characteristics:
1Since the aluminum silicate fiber has a small thermal conductivity, it has good thermal insulation performance and achieves good environmental protection and energy saving effects.
2 The heating rate is fast, the temperature control is precise, uniform, stable, and the thermal efficiency is high, which can ensure the technical parameters of product quality.
3 The furnace is easy to operate and the cycle is short. Just put the prefabricated components in place for each part. The box furnace was rebuilt and installed in only 4 days, and the oven took 5 days, less than 10 days in total. If it takes at least 10 days to build bricks, and the oven is 5-7 days, the total is more than half a month. It is obviously not allowed for the production furnace, and the new materials and furnace construction process will not affect the production. too.
4 long service life, long trouble-free operation period. Widely applicable, the well type furnace and box furnace modified by our factory have been in normal use for 5 years and 3 years, and no maintenance has been carried out during this period.
(3) In the past, when the box furnace was installed with the workpiece, no matter how careful it was, it was difficult to avoid not hitting the two rows of furnace wires below the two sides. When hitting the workpiece, the tow brick would be damaged by one or several pieces, or even encountered. Difficult to install a workpiece to burn a few places, if there is no time to repair or take some temporary measures to maintain production, but it is often inevitable that the upper and lower wire short circuit caused by the shutdown of maintenance, which brings great inconvenience and cause a certain economy Loss, for this reason, in the technical transformation, the sides of the furnace floor and the rear side were specially raised by 150mm, and there were 10 uniform holes of Φ90mm on the sides of the heightening to ensure the bottom sides The heat of the electric heating element is fully radiated, so that the protection of the two rows of the wire and the wire brick under the furnace without losing the electric heating element is completed. The modified furnace has been in operation for more than three years, which proves that this reduces the frequency of furnace maintenance, completely solves the problem of the lower side of the supporting brick and the furnace wire caused by the loading of the workpiece, and improves the integrity and process performance of the furnace.
5 use effect summary
(1) After years of use and testing, the total power of the modified box furnace is 81KW.
(2) The temperature rise is fast and the heat preservation performance is good. When the oven reaches 950 °C for one hour, the temperature of the shell on both sides of the furnace is 47 °C, which is lower than the 50 °C specified in China.
(3) Production actual test: our product, A seat support plate; increase 20 pieces, increase productivity by 50%; B spring, increase 40 pieces, increase productivity by 90%; C protector beam increase 10~12 pieces, productivity increase More than 60%.
(4) The structure of the furnace floor has been modified. The furnace lining has not been repaired for more than three years, which has improved production efficiency, saved maintenance costs and increased significant economic benefits.
(5) The use of aluminum silicate fiber based prefabricated parts and new technology improves the work efficiency, improves the thermal efficiency of the heating furnace, improves the uniformity of the furnace temperature, and improves the quality of the heat treated workpiece.
(6) The use of new materials and new processes to transform box furnaces has significant energy saving and energy saving, and the power saving rate is above 30%.
(7) Calculate the unit energy consumption with the two typical workpieces mentioned above:
A blade guard beam transformation: 1840.2KWh / t, after the transformation: 1362.8KWh / t, decreased by 477.4KWh / t;
B seat support: before the transformation: 806.5KWh / t, after the transformation: 526.2KWh / t, decreased by 280.3KWh / t, the average unit energy consumption was 1323KWh / t, after the transformation 944.5KWh / t, decreased by 378.9KWh / t . The visible effect is obvious.
To sum up: the application of new materials, new technologies, new processes to transform old traditional heat treatment equipment is also an important way to improve work efficiency, save energy and reduce consumption, and increase economic efficiency. ,
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Yongyue cryo vials are made of medical grade polypropylene (PP) and have no endotoxin. They are disposable laboratory consumables specially used for storing biological samples.
The anti-slip texture of the cap and body is easy to screw cap.
The tube cap has an O-ring built-in gasket to prevent liquid leakage.
The cryo tube is suitable for ultra-low temperature refrigerators, and the tolerance temperature is -86~121 °C, and it can be repeatedly frozen and thawed.
In the gaseous state of liquid nitrogen, it can withstand low temperature to -167 ℃.
According to different requirements, there are ordinary grade and PCR grade. PCR grade products are free of DNase, RNase, endotoxin and foreign DNA. Sterilized by gamma irradiation, sterile.
Cryo Vials,Cryovial 2ml,Cryotube 1.8 ml,Cryogenic Vials,0.5 ml Cryogenic Vials
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcrtube.com