China's coal cryogenic retorting process has made breakthroughs. Last week, the externally-heated rotary kiln cryogenic retorting process and complete sets of technical equipment independently developed by Xi'an Sanrui Industrial Co., Ltd. were appraised by experts from Xi'an Science and Technology Department of Shaanxi Province. The technology successfully solves the problems of traditional in-house retorting processes in raw material supply, wet quenching, gas purity, and wastewater treatment. The low-temperature dry distillation gas can be used not only as industrial and civil fuel but also as chemical raw material gas. According to Xie Xiaobing, deputy general manager of Xi'an Sanrui Industry Co., Ltd., the gas produced by the low-metamorphosis coal is purified after the retorting process using an external rotary rotary furnace. No large amount of inert gas is mixed in, and the gas calorific value reaches 4300 kcal/standard cubic meter. m, this relatively pure low-temperature dry distillation gas can be used not only as industrial and civil fuel, but also as a chemical raw material gas for methanation to obtain natural gas, extract hydrogen, or as raw material gas for methanol and synthetic ammonia. Taking the 1.2 million-ton/year blue carbon plant as an example, after the low-temperature carbonization process of the rotary furnace with external heat, the raw coal will be processed 1.85 million tons, the oil production is 138,000 tons, and the gas production is 370 million cubic meters. This not only solves the problem of combustion. The problem of environmental pollution has further increased the value of raw coal's by-products. At present, lump coal accounts for only 15% to 20% of mechanized coal mining in China. A large amount of crushed coal and coal at the end can not be used comprehensively. It can only be burned as steam coal, which not only pollutes the atmosphere, but also causes waste of resources. These low-metamorphic coals can obtain gas, tar and semi-coke through low-temperature dry distillation. However, the traditional internal retorting process has a large amount of inert gas mixed into the gas, resulting in a low calorific value of the furnace gas, low purity of hydrogen and methane, and the use requirements of industrial raw materials and civilian fuels cannot be met. Taking the Yulin area of ​​Shaanxi Province as an example, the existing Lanhua carbon production capacity in Yulin is approximately 20 million tons/year, and its by-product gas volume is equivalent to the equivalent annual calorific value of the first-line and second-line Shanxi-Beijing gas transmission. However, only a small amount of such coke oven gas is used as a fuel for heating in production, and most of them are directly discharged. Xie Xiaobing said that in addition to being used in the field of low temperature carbonization of coal, the external rotary rotary retort distillation process has other applicable fields, such as the upgrading of high-water coal, dry sludge treatment in urban sewage stations, and the production of smokeless fuel from low-grade coal. In areas such as gasification, combustion, and power generation, it is possible to realize the comprehensive utilization of coal and form a large-scale coal energy integrated industrial chain. In addition, the retort process of an external rotary furnace can also be used for thermal processing of other solid materials, such as oil shale retorting and waste treatment. News link Compared with the traditional process, the low-temperature carbonization technology of external thermal rotary coal has the following advantages: The raw materials have a wide range of applications. According to the final use of the product, the external rotary furnace can handle raw coal below 40 mm, and has advantages in handling crushed coal and end coal; the tar produced is of good quality and high yield. The produced tar has a low specific gravity and a high light weight component. The fraction before distilling at 300°C occupies 50.4% and the H/C atomic ratio ranges from 1.1 to 1.3, which is suitable for hydrogenation to produce fuel oil. The process device is flexible and flexible. The adjustment of the process parameters is convenient, and the yield of each product can be adjusted according to the changes in the market. Semi-foam moisture is low. With continuous dry quenching, semi-coke products are basically free of water. Pure gas, high calorific value. The produced gas has a CH4 content of 30%~35%, H2 of 42%~47%, CO of 10%~15%, and an active ingredient of more than 90%. It is a high quality industrial and civil gas fuel. Large capacity of equipment and high heat exchange efficiency. The capacity of a single set of equipment can reach more than 200,000 tons/year, which is double the production capacity of the traditional domestic retorting process. Technological development, extension and innovation are big. The low-temperature carbonization process of external heat rotary kiln can be combined with the rapid pyrolysis technology of heat semi-coke as the carrier. At present, Sanrui has successfully developed and designed a self-returning rotary kiln, which uses the return spiral tube set outside the furnace body or The return spiral arranged inside the furnace body can realize that the heat carrier with the rotation of the furnace body during the operation of the rotary kiln automatically returns to the feeding position and the raw materials are evenly mixed to achieve rapid pyrolysis of the raw coal. Aluminum machining is the use of CNC machining out, including: drilling, boring, cutting, turning, screw. Product material are: aluminum6061,6061-T6,6063,6083,7075.5052,2017 .In the high-speed machining out of the workpiece has a good finish. Aluminum machining product surface treatment has anode, electroplating, sand blasting, laser engraving LOGO, mechanical drawing, rolling flower, according to the requirements of the drawings on the product anode all kinds of colors such as color, black, red, blue, yellow. We have a special inspection department to carry out inspection, to ensure that each size of products meet the requirements of the drawings, machining aluminum(cnc aluminum) is the most common in mechanical processing, low density, not easy deformation, high precision products. So it is widely used in various industries. Machining Aluminum,Fluorocarbon Machining Aluminium,Alumiunum Machining,Milling Aluminum Hong Kong RYH CO., LTD , https://www.szcncmilling.com