The one-time commissioning of the project to replace tubular furnaces with medium-pressure steam for the enrichment of oil was a success

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The project to replace tubular furnaces with medium-pressure steam for heating rich oil was successfully commissioned in one go. Author/Source: Chuangju Technology. Date: April 9, 2022. Clicks: 12. In February 2022, the \"project to replace tubular furnaces with medium-pressure steam for heating rich oil\" at a coking plant in Shanxi, which was contracted out by Tianjin Chuangju Technology Co., Ltd. (hereinafter referred to as \"Chuangju Technology\"), was successfully commissioned in one go. Since its operation began a month ago, the rich oil heating system has been running stably with excellent performance metrics. Project Background: The problems associated with the process of removing benzene from rich oil using tubular furnaces are becoming increasingly prominent and need to be addressed urgently. Issues related to exhaust gas emissions from tubular furnace chimneys: The exhaust gases emitted by tubular furnaces must comply with **existing pollution emission standards. As environmental protection measures become more stringent, the requirements for treating the exhaust gases released from these furnaces’ chimneys are also getting stricter. Tubular furnaces have low thermal efficiency and high consumption of coke oven gas: Due to their low heating efficiency (around 70-75%), a large amount of gas is required, resulting in poor economic viability. Using a tubular furnace to heat rich oil results in high consumption; heating the rich oil with medium-pressure steam ensures more uniform heating, as there is no localized overheating. This leads to a significant reduction in coking issues associated with oil heating using tubular furnaces, thereby lowering the oil consumption. Tubular furnaces pose safety hazards: The use of open flames in tubular furnaces is not conducive to safe operation; improper handling can easily lead to fires and explosions. Additionally, due to the strict requirements regarding fire separation distances, tubular furnaces require a large amount of space. Feasibility of renovation: Currently, coking plants generally use dry quenching for coke production, and the high-pressure superheated steam generated as a by-product can be converted into medium-pressure superheated steam through temperature and pressure reduction ； Enterprises that use rising tube waste heat recovery for coke oven waste heat recovery can also obtain medium-pressure superheated steam, and both can be used as heat sources to heat rich oil in heaters. The oil-rich heating device occupies less space, requires a smaller safety distance, and is easy to install in any location. It is simple to integrate the modification device into the existing production system; this can be done by shutting down the operation for a short period of time and installing valves on the pipes of the old system, with little impact on crude benzene production during the modification process. Heating the rich oil with medium-pressure steam is more operationally stable compared to heating gas with a tubular furnace. Fluctuations in gas pressure have a significant impact on the temperature of the washing oil, whereas fluctuations in steam pressure have little effect, allowing for better control. Benefit analysis – Environmental benefits: Using medium-pressure steam to heat the rich oil in place of tube furnaces not only eliminates the need for flue gas treatment resulting from the combustion of gas in tube furnaces, but also allows for the recovery of low-pressure saturated steam and the condensate from low-pressure saturated steam. Safety benefits: By using oil-rich heaters in place of the traditional tubular furnaces for heating, there is no need for open-flame operations on site, which eliminates the risk of fires and explosions and increases the safety level of production. Conclusion: The successful commissioning of this project once again demonstrates the maturity of Chuangju Technology’s medium-pressure steam replacement technology for tubular furnaces, as well as its expertise in engineering applications.