Comparison of oxygen enrichment and intermittent energy consumption?

The application of oxygen-enriched continuous gasification needs to be tailored to the specific conditions of each enterprise. Since fixed-bed batch gasification technology is classified as a **underdeveloped technology whose use should be restricted**, and given the increasing interest in the oxygen-enriched continuous gasification process for briquettes, a responsible official from a research institution working on this technology said in an interview with reporters yesterday that there are also areas where the use of oxygen-enriched continuous gasification is limited; therefore, when promoting its use, it is necessary to take advantage of its advantages while avoiding its disadvantages, to adapt to each enterprise’s specific circumstances, and to pay attention to engineering design. The oxygen-enriched continuous gasification process for briquettes, designed by the Shandong Provincial Chemical Engineering Planning and Design Institute and developed by Fujian Sanming Chemical Co., Ltd., has been put into industrial production. Qu Shunli, deputy director of the Process Department at the Shandong Provincial Chemical Engineering Planning and Design Institute, warned that three aspects need to be taken into account when promoting this new technology. First, the new process is not suitable for monohydric alcohol production. The oxygen-enriched atmosphere used in the continuous oxygen-enriched gasification process has an oxygen volume fraction of only 50%–60%; as a result, the nitrogen volume fraction in the water gas remains above 10%, and water gas with such composition is not suitable for the production of monohydric alcohols. Using carbon dioxide from the decarburization section along with pure oxygen to create oxygen-enriched air as a gasification agent results in increased oxygen consumption and compression work, thereby raising costs. At the same time, the high methane content in the gas produced by oxygen-enriched continuous gasification also determines that this process is not suitable for the co-fermentation process with a high alcohol-to-ammonia ratio. Second, it is necessary to tailor measures to the specific circumstances of each enterprise. If a company can obtain bituminous coal powder at a lower price, or if there is low-quality local bituminous coal that can be processed into briquettes, it may consider using an oxygen-enriched continuous gasification process; using briquettes as raw material can help reduce production costs. For enterprises undergoing technological upgrades in old factories, the existing batch gasification furnaces can still be used. This expert recommends combining pressure swing adsorption oxygen production technology with oxygen-enriched gasification units and batch gasification units; this approach not only helps to address the issue of an insufficient nitrogen-to-hydrogen ratio in the gas but also saves on costs associated with nitrogen production. Qu Shunli suggests that for newly established enterprises, cryogenic air separation technology is a suitable choice. Although the initial investment is high, it allows for an increase in the production of oxygen, nitrogen, and argon; at the same time, carbon dioxide generated during ammonia synthesis can be recovered, enabling diversified business models. Third, design determines the outcome. The oxygen-enriched continuous gasification process has advantages such as wide adaptability to different coal types and particle sizes, high production capacity per furnace, and high carbon conversion rate; however, it also has drawbacks including a high oxygen concentration in the gas, a high carbon dioxide content, and a high methane content. Therefore, after choosing the oxygen-enriched continuous gasification process, enterprises should pay close attention to process selection and design.

Could that person provide a process flow diagram for unpowered ammonia recovery? I’d like to learn about it*

In the full low-temperature conversion process, what is the role of the pre-conversion furnace? And what is the impact of high sulfur content on the catalyst?

Could that person provide the calculations related to the gas generation and water washing tower, especially those regarding water consumption and tower diameter?

Could someone provide information on the structure of the water seal in gas tanks? Thank you

Could that person provide some information on waste-heat boilers?

Could someone provide information on the production process and consumption of ammonium bicarbonate in the food industry?