The advantages of supergravity bed compared with traditional rectification tower Baffled supergravity bed is a new type of high-efficiency rectification equipment, which was invented by Zhejiang University of Technology and jointly developed with Hangzhou Keli Chemical Equipment Co., Ltd. It is the first to apply supergravity technology. Continuous distillation process in industrial production. The working principle of the hypergravity bed is to realize the hypergravity environment through the centrifugal force generated by high-speed rotation, and replace the conventional gravity field with a centrifugal force field hundreds to thousands of times, so that the mass transfer speed of the vapor-liquid two-phase is greatly improved. The height of the equipment is greatly reduced. It is a major breakthrough to the traditional plate tower and packed tower. This equipment has been identified by a national expert group, and the product has reached the international advanced level (invention patent number: ZL011343214, ZL200510049145.1, US patent US 7,344,126 B2 and a number of utility model patents). In 2007, it was approved by the National Science and Technology Innovation Fund as a project of the National Torch Program (2011). In 2008, he won the first prize of Science and Technology Progress Award of China Petroleum and Chemical Industry Association (certificate number 2008JB0104-1-1), the second prize of Science and Technology Invention Award of the Ministry of Education in 2010, and the Chinese Patent Excellence Award in 2011.
Compared with the traditional distillation column, the supergravity bed has the characteristics of excellent performance, high efficiency, low comprehensive energy consumption, small volume, low height, safety and reliability. At the same time, it has the characteristics of simple operation, convenient maintenance, production safety and low management cost.
This equipment is widely used in the rectification and recovery of the following organic solvents: methanol, formaldehyde, toluene, ethanol, ethylene glycol, acetone, ethyl acetate, acetonitrile, tetrahydrofuran, dimethyl sulfoxide, methylal, n-butanol, Dichloromethane, silyl ether, cycloethane, isobutane, isopropanol, glacial acetic acid, acetic anhydride, DMF, DMSO, DMAA, DMDA, etc.
More than 900 sets of this equipment have been industrially applied in the industries of raw materials, pharmaceutical intermediates, fine chemicals, biodiesel, environmental protection, and wine making. The specific advantages of this equipment are shown in the following aspects:
1. Low equipment height, low civil construction cost and small footprint
In the hypergravity environment, the gas-liquid two-phase has a very large contact area and collision probability, the micro-mixing and mass transfer process are greatly enhanced, and the mass transfer efficiency can be increased ten times, making the huge tower into a highly inefficient tower. to 2 meters of supergravity bed. With a fuselage of 1.2 meters, this equipment is equivalent to a 15-meter-high conventional distillation column.
Due to the advantages of the height of the supergravity bed, compared with the traditional rectification tower, the civil construction cost required for the realization of the rectification purpose is greatly reduced in the whole design scheme. The height required by traditional rectification towers is often more than 10 meters, or even higher, the installation requirements are high, and a working platform for operators needs to be provided. For this reason, the civil construction cost is relatively large. The height of the super-gravity bed sheet machine is only more than 2 meters (including the height of the base), and the installation requirements are relatively low, so the civil construction requirements are relatively simple, and the civil construction cost is greatly reduced. Traditional distillation columns generally require bases and special supports, and occupy a large area, while the supergravity bed only needs about 1~2 square meters of floor space. In addition, due to the high traditional distillation tower, it has high requirements in terms of wind resistance, shock resistance, and lightning protection. Since this equipment can be installed indoors, no special protective measures are required in the above-mentioned aspects. At the same time, due to the high tower equipment, it needs to go through certain approval procedures. Like other indoor equipment, this equipment can be installed and operated after the approval of the overall project, without special approval procedures, thus saving more upfront costs.
2. Energy saving
If the design is very reasonable (referring to the ratio of theoretical plate to reflow), the energy consumption is mainly composed of two pieces. One is the latent heat of vaporization of the material, and this part of the supergravity bed is the same as the tower. The other is heat loss. The entire surface of our equipment is relatively small, and the heat dissipation is naturally very small, which can basically offset the increased energy consumption of the motor. In reality, the tower is often difficult to achieve ideal, whether it is the verticality of the tower installation or other factors, the tower plate efficiency is often not as ideal as the actual, so our equipment has a certain advantage of low energy consumption . According to expert appraisal, under the same conditions, the supergravity bed can save about 5%~40% energy than the traditional distillation column.
3. More suitable for heat-sensitive materials
Due to the high-speed rotation of the supergravity bed equipment and the small volume, the retained material and liquid are less and the liquid holding time is short. According to the operating conditions, the material and liquid stay in the equipment for only about 1-2 minutes, and heat-sensitive materials will not be in the equipment. Volatile, denaturation, resulting in great economic benefits. Materials that decompose over a long period of time at high temperatures are very suitable for this equipment.
4. Easy to operate
Compared with the traditional rectification tower, the supergravity bed is much more convenient to operate than the tower equipment due to its low height and small volume. The operation of tower equipment requires operators to frequently go to the top of the tower to observe the material condition, which brings certain hidden dangers to safety production. At the same time, it takes a long time for the tower equipment to start running to the design components at the top of the tower, and the shortest time to reach equilibrium is usually not less than 30 minutes. The operator must observe the operation on site during this time period. The operation and observation of this equipment is very convenient. At the same time, due to the short time it takes for the equipment to start to balance, it usually only takes ten minutes. The operator does not need to observe the equipment for a long time and can take into account the operation of other equipment, thereby reducing the labor intensity of the operator and saving energy. Labor costs, but also to ensure the safety of production.
5. Easy maintenance and low maintenance cost
Under normal circumstances, the traditional rectification tower needs to be repaired every six months, and the packing needs to be cleaned every year, and each inspection takes several days; while the supergravity bed only needs to replace the wearing parts such as the mechanical seal according to the national standard every six months, and each replacement It only takes a few hours, it is easy to operate, and maintenance is also very convenient.
6. Waste liquid discharge up to standard
Under the same conditions, the general column waste liquid discharge is about 3%, while the supergravity bed can meet customer and environmental protection requirements, and the discharge can be controlled below 0.5%, which has a good environmental protection effect and a good social benefits and corporate economics. Due to the advantages of the baffled supergravity bed compared to the tower equipment in many aspects, using it to replace the traditional tower equipment can save steel resources and prolong the service life of the earth's resources for the development of the society. It can save site and space resources, reduce pollution emissions, improve product quality, improve business management mode, reduce production labor intensity, and increase production safety. Hypergravity beds have very broad application prospects in industries such as environmental protection, medicine, and chemical industry, and are being used by more and more users. We are further improving and improving this equipment, so that it can meet the requirements of more customers in terms of more energy saving, increasing processing capacity, adapting to high temperature and high vacuum.
Hangzhou Keli Chemical Equipment Co., Ltd.
November 2018
Cooperation between our company and Zhejiang University of Technology:
The baffled supergravity rotating bed was invented by Zhejiang University of Technology, and was developed in cooperation with our company in 2001. In 2004, it was successfully developed for industrial application. Our company and Zhejiang University of Technology have jointly established a hypergravity engineering technology center, with 1 doctoral supervisor, 4 professors, and 6 associate professors/senior engineers. It has invested more than 5 million yuan in fixed assets. Zhejiang University of Technology has two professors leading a number of graduate students and doctoral students to work in the technology center all the year round. After nearly 20 years of accumulation, we have a large database of supergravity distillation designs for common solvents, ensuring that the design of each material is the most optimized and most energy-efficient.