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The new energy project at Yumenkou in Hejin City is expected to meet the conditions for project handover in May. Author/Source: Gasification World. Date: 2022-03-04. Clicks: 5. A comprehensive safety inspection was carried out on the new energy project at Yumenkou in Hejin City after the Spring Festival in 2022. Currently, the project is in the peak phase of equipment and pipeline installation. The project is expected to meet the handover conditions in May. The Yumenkou New Energy 50,000 m3/h Coke Oven Gas Comprehensive Utilization Project in Hejin City aims to produce 100,000 tons of LNG and 100,000 tons of liquid ammonia using coke oven gas. It mainly includes raw gas pretreatment, compression, purification, synthesis, liquefaction, synthetic ammonia, etc. The total investment for the project is 500 million yuan. Project Overview: Hejin Yumenkou New Energy Co., Ltd. was established in December 2019 and is located in the Hejin Economic and Technological Development Zone. It plans to build a project for the comprehensive utilization of coke oven gas by utilizing the vacant land to the north of Yumenkou Coking Company. In December 2019, the Development and Reform Bureau of Hejin City approved the comprehensive utilization project for coke oven gas with a capacity of 50,000 Nm3/h carried out by Hejin Yumenkou New Energy Co., Ltd. (project code: 2019-140882-45-03-111064). The total investment in this project was 500 million yuan; upon completion, it would have an annual production capacity of 100,000 tons of LNG and 100,000 tons of liquid ammonia. As a supporting project for Yumenkou Coking Company’s 1.72 million tons per year coking facility, this project aims to make comprehensive use of the remaining coke oven gas, and is scheduled to come online simultaneously with the coking plant. Project reliance: The site of this project is located within the Hejin Economic and Technological Development Zone. To its south lies the premises of the Yumenkou Coking Company; therefore, some of the auxiliary facilities can make use of those provided by the Yumenkou Coking Company as well as the infrastructure available in the park. The project’s water supply network relies on the park’s existing pipeline system, while the raw coke oven gas comes from the 1.72 million-ton coking plant operated by Yumenkou Coking Company. The medium-pressure steam required for startup and intermittent purging processes is supplied by the steam generated by that coking plant. The saline wastewater from boiler discharge systems, as well as wastewater from the circulating water system and other waste water generated during production and daily operations, are all treated at the sewage treatment plant operated by Yumenkou Coking Company. By making use of the supporting public and auxiliary facilities in the industrial park and Yumenkou Coking Company, it is possible to fully leverage the advantages of the park, reduce duplicate investments, lower energy consumption, and improve resource utilization. Process characteristics of the project: This project uses coke oven gas as raw material to produce LNG and liquid ammonia. Coke oven gas contains various impurities such as tar, naphthalene, benzene, sulfur, and ammonia; therefore, pre-treatment and purification processes are required first. The main process units include coke oven gas pre-treatment, gas storage tanks, coke oven gas compression, coke oven gas purification, methanation, cryogenic liquefaction, ammonia synthesis, ammonia synthesis compression, and ammonia freezing. In this project, the coke oven gas is stored in dry gas holders after pretreatment; a reciprocating compressor is used for pressurization. Desulfurization is achieved through two-stage hydrogenation conversion and two-stage desulfurization processes. After wide-temperature shift, carbon removal is carried out using activated MDEA liquid. Methane is synthesized employing adiabatic bed external heat transfer methanation technology, and LNG is produced through cryogenic liquefaction. The products are stored in vertical atmospheric pressure full-volume storage tanks. In the ammonia synthesis plant, the hydrogen-enriched off-gas from the LNG plant and the nitrogen supplied by the cryogenic nitrogen production plant are mixed in proportion and fed into the ammonia synthesis compression stage. This project adopts a low-pressure ammonia synthesis process, with a post-mounted waste heat boiler to recover heat. The ammonia synthesis plant is equipped with an ammonia refrigeration station. Liquid ammonia is stored in tanks at room temperature.