Ford, Bacon & Davis, a Salt Lake-based engineering company, has received a contract from E. I. duPont de Nemours & Co., Wilmington, Del., to design a proposed $50 million hazardous waste incinerator for the company's chemical plant in Deepwater, N.J.

Rolf Boltersdorf, vice president of incineration for FB&D, said his company will perform the design and engineering work for the proposed incinerator, supervise construction and assist in the start-up.He said the incinerator will have a heat release of 150 million British thermal units and will consist of a 12-meter-long rotary kiln with an after-burner chamber. The Deepwater incinerator will be nearly identical to a chemical incinerator FB&D is designing for duPont's Sabine River Works chemical plant in Orange, Texas.

Kelli Kukura, a spokeswoman for duPont, said the company has applied for a permit to build the facility and if received, construction will start in 1992.