A. advanced separation technology of methanol to olefins
Using "pre-cutting+oil absorption" process to replace the traditional cryogenic demethanization system, the process is simple and there is no cryogenic separation unit, which not only saves a lot of equipment investment, but also greatly reduces energy consumption and improves ethylene recovery rate.
On July 20 10, this technology was applied by Shaanxi Pucheng clean energy chemical company to the olefin separation unit of its first-phase 680,000 tons/year demonstration unit, which marked a major breakthrough in olefin separation technology with independent intellectual property rights in China.
20 12, 10 In June, Wison Engineering and Shandong Yangmei Hengtong Chemical Co., Ltd. signed a 300,000-ton/year methanol-to-olefin plant engineering design contract and an olefin separation unit patent implementation license, process package preparation and technical service contract. This is another commercial application of olefin separation technology independently developed by Huisheng Engineering after Pucheng Project.
B. Shell develops a new generation of clean coal gasification technology
Wison Engineering and Shell combine their respective advantages in R&D, design and engineering, and jointly develop low-cost, environmentally-friendly and adaptable mixed gasification technology in China, so as to expand the market demand for syngas in coal chemical industry, hydrogen production and fertilizer industry, and further contribute to the clean and efficient utilization of coal resources in China.
Promoting energy conservation and emission reduction with technological innovation
C. Complete sets of energy-saving and consumption-reducing technologies for methanol production from coal
The pinch technology of heat exchange network is used to analyze and optimize the whole process of coal-to-methanol production, so as to achieve the goal of minimum energy consumption, minimum resource consumption and minimum emission in the whole plant. Its core is Huisheng patented technology: a methanol heat pump distillation process, which saves the consumption of cold and hot utilities. Compared with the traditional methanol double-effect distillation process, the comprehensive energy consumption can be reduced by about 50%. Using the "complete technology of energy saving and consumption reduction for coal-to-methanol process", the water consumption per ton of methanol can be reduced by 30%, and the operating energy consumption can be reduced by 17%.
D, using a viscosity reduction tower to realize two sets of energy-saving and consumption-reducing technologies for viscosity reduction of quench oil system.
In view of the difficulties in the operation of several sets of quench oil systems in domestic ethylene plants, the technology of "using pyrolysis gas of ethane and propane cracking furnaces as stripping medium and setting up a visbreaking tower as visbreaking process for two sets of quench oil systems" was applied for the first time in China through technological innovation, with less equipment investment and remarkable effect. According to the characteristics of the plant, the "visbreaking tower technology with ethane furnace cracking gas as stripping medium" was adopted, which effectively reduced the viscosity of quench oil, increased the amount of dilution steam, effectively reduced the discharge of process sewage, and achieved obvious energy saving and emission reduction effects.
E. catalytic distillation of methanol to dimethyl ether technology
Huisheng patented technology: the method of producing dimethyl ether by combining fixed bed reactor with catalytic distillation. The process of synthesizing dimethyl ether by catalytic distillation and dehydration of methanol was systematically studied. The experiment shows that the single-pass conversion rate of methanol can reach more than 95% by using liquid-phase fixed bed combined with catalytic distillation technology, which saves energy by more than 47% compared with gas-phase synthesis technology. The process is simple and the investment is low.