Announcement of Candidates Shortlisted for the Second Round of EPC Tender for the 150t/h Dry Quenching Project of Yunnan Dawa Coking Co., Ltd

Construction scale: Yunnan Dawa Coking Co., Ltd. currently has 4×55-hole 5.5m rammed coke ovens, along with two associated wet quenching systems. The annual coke production capacity is 2 million tons. Cokes ovens No. 1 and No. 2 belong to System A, while cokes ovens No. 3 and No. 4 belong to System B. The wet quenching process is used for coke production; however, in order to recover the sensible heat of red coke, reduce energy consumption, minimize pollution, and improve the quality of coke, it has been decided to adopt the dry quenching process instead. The energy-saving and environmental protection project for dry quenching of coke at Yunnan Dawa Coking Co., Ltd. is being carried out in two phases. The first phase involves the construction of Unit 1 of System A for dry quenching of coke, with a coke processing capacity of 150 t/h ； The second-phase project involves the construction of Unit 2 of the B system for dry quenching coke, with a coke processing capacity of 150 t/h. The 1# and 2# dry quenching systems are independent of each other; the two wet quenching units currently in use by the company will be retained as backups in case of maintenance or failures of the dry quenching systems. The scope of this tender includes the engineering design for Phase 1, the procurement of equipment and materials, the general contracting for construction, as well as the design for Phase 2. Contents of Phase 1 project construction (construction of Unit 1 dry quenching furnace for System A): Unit 1 dry quenching furnace and its auxiliary facilities are located to the north of the quenching tower of the coke ovens in System A. In addition, a new biological treatment plant with a capacity of 100 m3/h for the advanced treatment of recycled water will be built to the south of the existing wastewater treatment station. A dust removal facility will also be constructed in the existing coke screening and storage building; this includes equipment for transporting red coke, the dry quenching furnace and its gas supply systems, loading and discharging devices, gas circulation system equipment, elevators and auxiliary equipment, a coke processing system (including the sealing of coke conveyor corridors and dust removal upgrades for the coke screening building), environmental protection facilities for dry quenching, a dry quenching boiler and its auxiliary units, a boiler feed water pump station, utility tunnels and pipelines in the dry quenching area, a nitrogen pressurization station, a power distribution room, a safety interlock control system, detectors for flammable and toxic gases, anti-corrosion and insulation works, electrical and instrumentation control systems, a fire alarm system, as well as other auxiliary facilities such as water supply and drainage systems and lighting. Power media such as process water, fire-fighting water, domestic water, demineralized water, circulating water, electricity, coke oven gas, low-pressure steam, instrument compressed air, ordinary compressed air, and nitrogen are all connected to the power pipeline network of Yunnan Dawa Coking Co., Ltd.

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