High-efficiency methanol separator for synthetic ammonia and methanol production successfully developed
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Shanxi Yongji Zhongnong Chemical Co., Ltd. applied Beijing Boxue Huitong Technology Co., Ltd.’s patented “composite efficient foam trap” technology to the methanol production process for the first time.* * It improves the crude methanol separation efficiency and completely solves the problems of methanol circulation machine carrying liquid, high power consumption of the synthesis system, and oil-water pollution of the methanol oil-water separator. “The scientific and technological achievement of "composite high-efficiency methanol separator" has passed the appraisal organized by the China Petroleum and Chemical Industry Association. Experts believe that this technology is innovative and is at the advanced level of similar products in the world. The composite high-efficiency methanol separator has the characteristics of large processing capacity, low resistance and high separation efficiency. It has remarkable effects in saving energy, reducing consumption and reducing environmental pollution. There are more than 300 methanol production units and more than 1,500 methanol separators in my country. If two-thirds of methanol production companies can apply this technology, about 1 billion kilowatt hours of electricity can be saved every year. At present, only 25 composite methanol separators have been put into operation in China, and promotion work is particularly urgent. It is understood that the separation efficiency of the aerosol separator has a great impact on the economic benefits of synthetic ammonia and methanol production. At present, commonly used equipment for separating mist from gases include spiral plate separators, wire mesh separators, combined separators, packing separators, etc. When these separators handle large gas volumes, they have shortcomings such as high separator resistance, bulky equipment, or low separation efficiency. Even if the technology of some well-known foreign manufacturers is used, the low-temperature purification gas mist separation effect is not ideal. ； In production, separation efficiency often decreases due to unreasonable design and load changes. Especially when the gas velocity is too high, the secondary entrainment problem of the methanol separator becomes increasingly serious, seriously affecting the normal operation of the ammonia synthesis system and the methanol distillation system. The composite separator was successfully applied for the first time in a 100,000 tons/year ammonia co-production 30,000 tons methanol unit, which solved the above problems. This technology can be widely used for desulfurization in the mist process and purification process of synthetic ammonia and methanol production, gas-liquid separation after decarbonization absorption tower, gas-water separation, ammonia separation, methanol separation after saturated hot water tower, oil-water separation at the outlet of oil-lubricated compressor (circulator), and mist separation in low-temperature methanol washing absorption tower, carbon dioxide regeneration tower and hydrogen sulfide concentration tower.
A case of flowers blooming inside the wall and fragrant outside the wall! Friends who are familiar with similar devices, please tell me where the advanced ones are, and seize the time to promote them!
The characteristic of the composite high-efficiency mist catcher is that three separation technologies, including gravity sedimentation, inertial collision, and centrifugal separation, are used simultaneously in one device for separating mist from gas. Its structure is:: Use two or more layers (the number of layers depends on the process requirements) of concentric circular sleeves. Both ends of the cylinder are closed. The central tube is externally connected to the air inlet pipe. The lower part of the annular gap between each layer of cylinders has a liquid outflow hole. The outer cylinder is covered with a wire mesh (the specifications, materials and layers of the wire mesh are determined according to the process requirements). The cylinder body has 2 symmetrical openings (opening size). The size, quantity and shape are determined according to the process needs), the adjacent inner and outer cylinder openings are staggered by 90° (the stagger angle is determined according to the number of openings), the outermost layer is the gas outlet on the upper part of the foam catcher shell, and the liquid outlet on the lower part. The gas inlet connected to the central tube can be designed at either the upper or lower part of the foam catcher.
“Application of "Composite High-efficiency Foam Catcher" in Synthetic Ammonia Plant 1. Introduction Yunwei Group Zhanhua Co., Ltd. was formerly Yunnan Zhanyi Fertilizer Factory. The original design used anthracite as raw material, with an annual output of 60,000 tons of synthetic ammonia and 110,000 tons of urea. After years of potential tapping and technological transformation, the company's current single-system production capacity of the old system has reached 120,000 tons of synthetic ammonia, 200,000 tons of urea, and 15,000 tons of methanol. Synthetic ammonia uses anthracite lump coal as raw material, produces semi-water gas by atmospheric pressure gap gasification, tannin desulfurization, pressure conversion, Benfield decarbonization, co-production of methanol, copper washing, and high-pressure ammonia synthesis. The aqueous solution full cycle process is used to produce urea. Due to low production capacity in the past few years, the production system status was basically normal. Since 2000, as the technical transformation of the plant was gradually completed and the production system capacity gradually increased, the problem of poor separation effect of the separator in the lower part of the condensation tower of the ammonia system has become increasingly serious. After many technical transformations, it is still not ideal, which has seriously affected the normal operation and consumption of the ammonia system and has become a major technical problem for the plant. In order to solve this problem, the factory organized technical personnel to conduct research on similar enterprises across the country, and sought help from relevant scientific research, design and separator manufacturers to solve the problem. Although many technical modifications were made to the separation part and many measures were taken, the results were not ideal. The ammonia content at the entrance of the synthesis tower is as high as 6.4%, and the production capacity of synthetic ammonia can only reach about 100,000 tons/year. The power consumption of synthetic ammonia is very high, which seriously affects the production and consumption of the system. In 2003, the factory decided to use Shanghai Huiya Chemical Technology Co., Ltd.'s self-developed "composite high-efficiency foam catcher" technology to carry out technical transformation of the separator in the lower part of the condensation tower of the ammonia synthesis system. The upper heat exchanger of the condensation tower was not moved, and a new internal part was made for the lower separator. No modification was made to the high-pressure outer cylinder of the condensation tower. After the overhaul and commissioning in October 2003, the ammonia content at the entrance of the synthesis tower dropped from 6.4% to about 3%, a drop of 45.3%. The pressure at the entrance of the synthesis tower dropped by nearly 3MPa. The electricity consumption per ton of ammonia was approximately 47 kWh, and the separation efficiency was close to 100%. achieved * * success. 2. Basic parameters and operation conditions of the lower separator of the original condensation tower. The inner diameter of the outer cylinder of the original condensation tower of the factory was DN800, and the size of the lower separator was ф670×2970. The original design was inertia plus cyclone separation. After many transformations, multi-layer wire mesh filtration and separation was used before the transformation in 2003. The process flow is as follows: Fresh gas + circulating gas ammonia evaporator, lower part of the condensing tower, separator, upper part of the condensing tower, heat exchanger, ammonia synthesis tower. Liquid ammonia is mixed with the fresh gas from the outlet of the synthesis cycle machine and the compression section, and is cooled by the heat exchanger on the upper part of the condensing tower. Due to the poor performance of the separator in the lower part of the condensation tower, ammonia entrainment is serious. When the inlet pressure of the synthesis tower is 32MPa and the condensation temperature is 4 to 6°C, the inlet ammonia content reaches as high as 6.4%, and the power consumption per ton of ammonia is very high. 3. Basic parameters and operation conditions of the new composite high-efficiency separator. The internal parts of the separator modified by the new "composite high-efficiency foam catcher" technology adopt a special design. The internal parts of the separator are ф660×2970, and the outer cylinder of the condensation tower has not been modified in any way. The separator is designed with a separation efficiency of 99.8%. After the new internal parts are put into production and operation, the operating pressure is ≤31MPa, the temperature is 4~6℃, the flow rate is 190,000NM3/h, and the ammonia content at the entrance of the synthesis tower is about 3%. The separation efficiency is close to 100%, the synthetic ammonia production capacity is increased by nearly 20%, and the power consumption per ton of ammonia is reduced by nearly 47 kilowatt hours. 4. Conclusion Through production practice, it has been proved that the "composite high-efficiency foam catcher" technology is very successful in the separation of synthetic ammonia, and its design idea is correct. The ammonia content at the entrance of the synthesis tower dropped from 6.4% to about 3%, a decrease of 45.3%. The pressure at the entrance of the synthesis tower dropped by nearly 3MPa. The electricity saving per ton of ammonia was about 47 kWh, and its separation efficiency was close to 100%. This technology can effectively solve the technical problems of small separation capacity and low efficiency of the ammonia synthesis system, and provides a good choice for the technological transformation of chemical fertilizer companies.
I read this information in the newspaper. The level of accuracy cannot be that high. The manufacturers who have used it can come forward and publish your actual measurement data and attach the test method.
The separator uses* * Inventive patented technology, based on the characteristics of the methanol separation process, has made special designs to solve the problem of small droplets formed by methanol condensation and easy formation of secondary entrainment. It adopts a unique air flow distribution structure and separation structure, which significantly improves the separation efficiency of crude methanol in the methanol production process. It has a large air volume and small resistance, reduces power consumption, reduces pollution, and is safe and reliable. The separator has reasonable design, advanced technology and strong innovation, reaching the advanced level of similar international products. This technology was successfully applied for the first time in a 100,000-ton synthetic ammonia co-production 30,000-ton methanol unit. * * It improves the crude methanol separation efficiency and completely solves the problems of methanol circulation machine carrying liquid, high power consumption of the synthesis system, and oil-water pollution of the methanol oil-water separator. At present, there are more than 170 methanol production enterprises in my country, with an annual production capacity of about 15 million tons. If this device is promoted and applied in the domestic methanol industry, it can solve the shortcomings of traditional separators such as high resistance, large equipment, or low separation efficiency, improve the separation efficiency of crude methanol, and also have significant effects in energy saving, consumption reduction, and environmental pollution reduction, and has good economic and social benefits and promotion value.
How do you feel about pure advertising? I suggest the moderator move this to the advertising information column.
“The application of "composite high-efficiency foam catcher" in synthetic ammonia equipment is pure advertising and has no knowledge of synthetic ammonia. The ammonia content at the entrance of the synthesis tower of domestic ammonia companies is controlled at about 3%. If the ammonia content at the entrance of the synthesis tower before the transformation is 6.4%, it is simply impossible. Synthetic ammonia cannot be produced, the net ammonia content will not reach 8%, and the pressure of the synthesis tower will be very high. Assuming that the ammonia content at the inlet of the synthesis tower is really 6.4%, it only shows that the ammonia cooling system is missing in the design of the device. Is this still called a design institute? I am familiar with Mr. Song from Zhanhua Co., Ltd. of Yunwei Group, and his level is very high. I think it is false advertising, and I recommend deleting it and deducting the score.
Please confirm the authenticity of this message before deciding whether to delete it! ! !
The comment from the 8th floor is too ignorant. When the ammonia component is not properly separated and the liquid is retained for a long time, and the turbine can discharge the ammonia, and there are inherent problems with the heavy-loaded separation components of the condensation tower and the separation is not good, the ammonia content at the entrance of the synthesis tower may reach 6.4%. This has happened in many factories. I think it can only be said that it is rare but strange.