Energy-saving renovation of low-temperature methanol washing
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As the title suggests, the low-temperature methanol washing technology has become largely mature through improvements and optimizations over the years. In recent years, turbine technology has been employed to recover the kinetic energy of methanol-rich fluid flowing from the high-pressure area to the medium-pressure area for power generation or to drive methanol pumps, and its operation has proven to be relatively stable. What other energy-saving technologies are there? Dear sea friends, let’s discuss and help each other improve our knowledge
Our facility uses an expander coupled with a generator; the expander can provide sufficient cooling capacity, allowing the ice machine to be shut down completely, while still generating electricity
Which company’s technology is used for the expanders currently in use? Is it a liquid turbine?
The older NHD desulfurization and decarbonization technologies already made use of hydraulic turbines to recover energy. Nowadays, some companies send the synthetic exhaust gases through low-temperature methanol washing processes for purification, which allows them to recover a portion of the methanol. As a result, there is no need to replenish methanol regularly in these processes; instead, methanol can be discharged periodically, thereby reducing methanol consumption. Linde’s 9-tower low-temperature methanol wash can also produce carbon dioxide product gas for use in dry ice production, while reducing exhaust gases and carbon emissions.
Could you provide the equipment manufacturer and a detailed description of the process?
Regardless of which manufacturer’s process package is used, the methanol wash can utilize its own power to lower the temperature of the semi-poor liquid, eliminating the need for a stripping tower to ensure that the semi-poor liquid meets the design specifications. At the same time, the amount of CO2 recovered reaches over 85% of the total.
Our company’s low-temperature methanol washing process was one of the first to use expanders; they were put into use in 2009, with Atlas models being utilized. In gasification, a large amount of syngas is produced as fuel gas. By using expanders, it is possible to generate electricity; moreover, due to the large volume of expansion, even refrigeration compressors can be shut down. Currently, Zhejiang Petrochemical Phase I and Zhenhai Refining & Chemical use expanders, which ensure great stability.
Do you use expanders to generate electricity or to drive pumps? We also plan to carry out modifications, but we find that generating electricity to be rather complicated; therefore, we would like to ask whether it is possible to use them to drive other pumps, and if there are any successful examples of this Thank you!
It is used to generate electricity while also providing cooling, thereby reducing the cooling load for propylene. Over a thousand degrees per hour for us; other refineries use large expanders that generate several thousand degrees of electricity per hour. Generating electricity is simple; it can be fed into one’s own internal power grid.
“Our facility uses an expander coupled with a generator; the expander can provide sufficient cooling, so the ice machine can be shut down completely, and electricity can still be generated.” – It seems unlikely; can such a balance be achieved?
Could you provide the manufacturer’s phone number or other contact information?