The reporter learned from Shandong Qingzhou Longyu Chemical Technology Co., Ltd. on December 24, 2007 that the dimethyl ether process produced by the reaction distillation process developed by Shandong University of Science and Technology and its ancillary equipment technology were on the company's 50,000-ton/year demonstration plant. Successfully achieved industrial production. The operating results showed that the single-pass methanol conversion rate was more than 90%, the dimethyl ether selectivity was higher than 99%, and the operation flexibility of the device was large. The production scale could be adjusted with the pressure.
It is understood that although the existing dimethyl ether technology already has the ability to build a multi-million-ton device, it can only achieve large-scale and large-scale production on the basis of multiple sets of devices. High-efficiency reaction and separation equipment is an important support for achieving quantified production of dimethyl ether. To achieve the scale and large-scale targets set by the National Development and Reform Commission, we must proceed from both the process and the equipment.
The reactive distillation process developed by Shandong University of Science and Technology, a step-by-step process for the production of dimethyl ether, is a dimethyl ether liquid phase preparation technology. The process has many innovations. It adopts a "liquid-liquid-gas" mixed-phase reactive distillation process route. The liquid phase and gas phase of methanol and the catalyst molecules are fully contacted and reacted at a temperature of 120 to 180°C, and the reaction heat is utilized rationally. As a result, the conversion rate is high and the energy consumption is low. The reaction flash section eliminates waste water pollution and corrosion of the upper equipment due to the effect of the degumming phase of the washing section; the generated dimethyl ether gas is easily detached from the liquid phase, and the investment is only equivalent to the same type. 40%~50% of technology; the process is simple and easy, no need to increase the regeneration process and equipment.
The operation results of Shandong Qingzhou Longyu Chemical Technology Co., Ltd. demonstration device show that the production of 1 ton of dimethyl ether consumes 1.4 tons of methanol, the content of dimethyl ether in the reaction distillation tower outlet exceeds 95%, and a single set of equipment has reached 1 million tons. Production capacity. In addition, the supporting equipment NS tilted long strip composite trays and the new high-efficiency trays provide support for reducing the energy consumption and investment in the reactive distillation process.
It is understood that one of the biggest highlights of the process is the ability to ensure large-scale, large-scale devices to achieve safe and efficient operation. According to Professor Tian Yuanyu, head of technology research and development at Shandong University of Science and Technology, the reaction distillation process achieves constant temperature and rapid response by adjusting the ratio of vapor to liquid of the feed methanol. This not only provides technical support for large-scale production, but also can meet market demands. 0.1-1.0MPa pressure range within the flexible adjustment of production scale.
It is understood that although the existing dimethyl ether technology already has the ability to build a multi-million-ton device, it can only achieve large-scale and large-scale production on the basis of multiple sets of devices. High-efficiency reaction and separation equipment is an important support for achieving quantified production of dimethyl ether. To achieve the scale and large-scale targets set by the National Development and Reform Commission, we must proceed from both the process and the equipment.
The reactive distillation process developed by Shandong University of Science and Technology, a step-by-step process for the production of dimethyl ether, is a dimethyl ether liquid phase preparation technology. The process has many innovations. It adopts a "liquid-liquid-gas" mixed-phase reactive distillation process route. The liquid phase and gas phase of methanol and the catalyst molecules are fully contacted and reacted at a temperature of 120 to 180°C, and the reaction heat is utilized rationally. As a result, the conversion rate is high and the energy consumption is low. The reaction flash section eliminates waste water pollution and corrosion of the upper equipment due to the effect of the degumming phase of the washing section; the generated dimethyl ether gas is easily detached from the liquid phase, and the investment is only equivalent to the same type. 40%~50% of technology; the process is simple and easy, no need to increase the regeneration process and equipment.
The operation results of Shandong Qingzhou Longyu Chemical Technology Co., Ltd. demonstration device show that the production of 1 ton of dimethyl ether consumes 1.4 tons of methanol, the content of dimethyl ether in the reaction distillation tower outlet exceeds 95%, and a single set of equipment has reached 1 million tons. Production capacity. In addition, the supporting equipment NS tilted long strip composite trays and the new high-efficiency trays provide support for reducing the energy consumption and investment in the reactive distillation process.
It is understood that one of the biggest highlights of the process is the ability to ensure large-scale, large-scale devices to achieve safe and efficient operation. According to Professor Tian Yuanyu, head of technology research and development at Shandong University of Science and Technology, the reaction distillation process achieves constant temperature and rapid response by adjusting the ratio of vapor to liquid of the feed methanol. This not only provides technical support for large-scale production, but also can meet market demands. 0.1-1.0MPa pressure range within the flexible adjustment of production scale.