Commissioning of the high flash point gas recovery project for Sino-Singapore Chemical’s gasification unit

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Commissioning of the High Flash Point Gas Recovery Project at Sino-China Chemical’s Gasification Unit Author/Source: Sino-China Chemical Date: April 28, 2022 Clicks: 8 After preliminary research, equipment selection, and holding promotion meetings, the gasification, methanol, and electrical instrumentation departments installed all the necessary equipment and pipelines within just 11 days by setting clear deadlines and assigning tasks. The project was commissioned as scheduled on April 23, and its successful operation marks a new breakthrough in the company’s efforts to reduce energy consumption and emissions. The high flash vapor recovery project for the gasification unit involves cooling and dehydrating the flash vapor that was originally intended to be vented through a flare in the gasification unit; after separation and dust removal, this vapor is recovered and sent to the sulfur recovery burner in the methanol production unit for combustion. This process generates steam at 0.5 MPa, and it also replaces some of the vent gas that is continuously fed into the fuel pipeline of the sulfur recovery burner to prevent blockages. By recovering this vent gas, the methanol production volume increases indirectly. The implementation of the high flash point recovery project for the gasification unit not only generated economic benefits for the company but also made a significant contribution to its efforts in reusing existing materials. In this project, the large heat exchangers and dust removal separators are all sourced from equipment that the company no longer uses; most of the pipelines are also reused. For example, the longest transmission pipeline running from the gasification slag water zone to the methanol sulfur recovery zone was created by modifying an old wastewater pipeline that was used to transport high-ammonia-nitrogen wastewater from the former thermoelectric plant to the methanol plant. The implementation of this project, through the reuse of heat exchangers and dust removal separators, saved the company approximately 156,000 yuan in purchasing costs.