DHHI has independently researched and developed various series dust-removal products for coke oven, forming an integrated full-range service system from fume collection to fume governing and provided a lot of quality environment-friendly dust-removal equipment for domestic coking, iron and steel making enterprises.
The coke oven dust-removal system is used in the coking process of steel and coking plants for treating the smoke and dust generated by the coke oven during the coking process. The low-pressure pulse bag dust-removal technology is used, which is high in dust-removal efficiency, with the dust emission concentration meeting the ultra-low requirement of ≤10mg/Nm³. It is applied in steel and coking plants, classified as machine and coke side dust removal for tamping coke oven, machine and coke side dust removal and coal charging dust removal for top-charging coke oven.

DHHI has been engaged in the treatment of wastewater such as coking wastewater, coal chemical wastewater, desulfurization and denitrification wastewater, zero discharge of wastewater, domestic wastewater, tannery wastewater, pesticide wastewater, food processing wastewater, pharmaceutical wastewater, machining wastewater and chemical industry wastewater, etc. and serving many fields e.g. electric power, steel, coal chemical and petrochemical industries, etc. through the business modes of EPC, BOT, etc., with experiences in design, management, construction, commissioning, operation of related projects.