Wisconsin Administrative Code › Department of Natural Resources › NR 600-699 - Environmental Protection - Hazardous Waste Management › Chapter NR 666 - Standards For Managing Specific Hazardous Wastes And Specific Types Of Hazardous Waste Management Facilities › Subchapter H - Hazardous Waste Burned in Boilers and Industrial Furnaces › Section NR 666.110 - Waiver of DRE trial burn for boilers

Current through June 24, 2024
Boilers that operate under the special requirements of this
					 section, and that do not burn hazardous waste containing (or derived from) EPA
					 hazardous waste numbers F020, F021, F022, F023, F026 or F027, are considered to
					 be in conformance with the DRE standard of s.
					 NR
					 666.104(1), and a trial burn to
					 demonstrate DRE is waived. When burning hazardous waste, all of the following
					 apply:
(1) A minimum of 50% of fuel
				  fired to the device shall be fossil fuel, fuels derived from fossil fuel, tall
				  oil, or, if approved by the department on a case-by-case basis, other
				  nonhazardous fuel with combustion characteristics comparable to fossil fuel.
				  Such fuels are termed primary fuel for purposes of this section. (Tall oil is a
				  fuel derived from vegetable and rosin fatty acids.) The 50% primary fuel firing
				  rate shall be determined on a total heat or mass input basis, whichever results
				  in the greater mass feed rate of primary fuel fired.
(2) Boiler load may not be less than 40%.
				  Boiler load is the ratio at any time of the total heat input to the maximum
				  design heat input.
(3) Primary
				  fuels and hazardous waste fuels shall have a minimum as-fired heating value of
				  8,000 Btu/lb, and each material fired in a burner where hazardous waste is
				  fired shall have a heating value of at least 8,000 Btu/lb, as-fired.
(4) The device shall operate in conformance
				  with the carbon monoxide standard provided by s.
				  NR
				  666.104(2) (a). Boilers subject to
				  the waiver of the DRE trial burn provided by this section are not eligible for
				  the alternative carbon monoxide standard provided by s.
				  NR
				  666.104(3).
(5) The boiler shall be a watertube type
				  boiler that does not feed fuel using a stoker or stoker type
				  mechanism.
(6) The hazardous waste
				  shall be fired directly into the primary fuel flame zone of the combustion
				  chamber with an air or steam atomization firing system, mechanical atomization
				  system, or a rotary cup atomization system under any of the following
				  conditions:
(a)
Viscosity.
The viscosity of the hazardous waste fuel as-fired may not exceed 300
				  SSU.
(b)
Particle
				  size.
When a high pressure air or steam atomizer, low pressure
				  atomizer or mechanical atomizer is used, 70% of the hazardous waste fuel shall
				  pass through a 200 mesh (74 micron) screen, and when a rotary cup atomizer is
				  used, 70% of the hazardous waste shall pass through a 100 mesh (150 micron)
				  screen.
(c)
Mechanical
				  atomization systems.
Fuel pressure within a mechanical atomization
				  system and fuel flow rate shall be maintained within the design range taking
				  into account the viscosity and volatility of the fuel.
(d)
Rotary cup atomization
				  systems.
Fuel flow rate through a rotary cup atomization system shall
				  be maintained within the design range taking into account the viscosity and
				  volatility of the fuel.