NR 464.02(34)(34)“Recovery furnace” means an enclosed combustion device where concentrated spent liquor is burned to recover sodium and sulfur, produce steam and dispose of unwanted dissolved wood components in the liquor.
NR 464.02(35)(35)“Screen system” means equipment in which oversized particles are removed from the pulp slurry prior to the bleaching or papermaking system washed stock storage.
NR 464.02(36)(36)“Secondary fiber pulping” means a pulping process that converts a fibrous material, that has previously undergone a manufacturing process, into pulp stock through the addition of water and mechanical energy. The mill then uses that pulp as the raw material in another manufactured product. These mills may also utilize chemical, heat and mechanical processes to remove ink particles from the fiber stock.
NR 464.02(37)(37)“Semi-chemical pulping” means a pulping process that combines both chemical and mechanical pulping processes. The semi-chemical pulping process produces intermediate yields ranging from 55 to 90%.
NR 464.02(38)(38)“Soda pulping” means a chemical pulping process that uses sodium hydroxide as the active chemical in the cooking liquor.
NR 464.02(39)(39)“Spent liquor” means process liquid generated from the separation of cooking liquor from pulp by the pulp washing system containing dissolved organic wood materials and residual cooking compounds.
NR 464.02(40)(40)“Steam stripper system” means a column, including associated stripper feed tanks, condensers or heat exchangers, used to remove compounds from wastewater or condensates using steam. The steam stripper system also contains all equipment associated with a methanol rectification process including rectifiers, condensers, decanters, storage tanks and any other equipment serving the same function as those previously listed.
NR 464.02(41)(41)“Strong liquor storage tanks” means all storage tanks containing liquor that has been concentrated in preparation for combustion or oxidation in the recovery process.
NR 464.02(42)(42)“Sulfite pulping” means a chemical pulping process that uses a mixture of sulfurous acid and bisulfite ion as the cooking liquor.
NR 464.02(43)(43)“Temperature monitoring device” means a piece of equipment used to monitor temperature and having an accuracy of +1.0% of the temperature being monitored expressed in degrees Celsius or +0.5 degrees Celsius (°C), whichever is greater.
NR 464.02(44)(44)“Thermal oxidizer” means an enclosed device that destroys organic compounds by thermal oxidation.
NR 464.02(45)(45)“Turpentine recovery system” means all equipment associated with recovering turpentine from digester system gases including condensers, decanters, storage tanks and any other equipment serving the same function as those previously listed. The turpentine recovery system includes any liquid streams associated with the turpentine recovery process such as turpentine decanter underflow. Liquid streams that are intended for byproduct recovery are not considered turpentine recovery system condensate streams.
NR 464.02(46)(46)“Weak liquor storage tank” means any storage tank except washer filtrate tanks containing spent liquor recovered from the pulping process and prior to the evaporator system.
NR 464.02 HistoryHistory: CR 00-175: cr. Register March 2002 No. 555, eff. 4-1-02.
NR 464.03NR 464.03Standards for the pulping system at kraft, soda and semi-chemical processes.
NR 464.03(1)(1)The owner or operator of each pulping system using the kraft process subject to the requirements of this chapter shall control the total HAP emissions from the following equipment systems, as specified in subs. (3) and (4):
NR 464.03(1)(a)(a) At existing affected sources, the total HAP emissions from the following equipment systems shall be controlled:
NR 464.03(1)(a)1.1. Each LVHC system.
NR 464.03(1)(a)2.2. Each knotter or screen system with a total HAP mass emission rate greater than or equal to the rate specified in subd. 2. a. or b. or the combined rate specified in subd. 2. c.:
NR 464.03(1)(a)2.a.a. Each knotter system with emissions of 0.05 kilograms or more of total HAP per megagram of ODP (0.1 pounds per ton).
NR 464.03(1)(a)2.b.b. Each screen system with emissions of 0.10 kilograms or more of total HAP per megagram of ODP (0.2 pounds per ton).
NR 464.03(1)(a)2.c.c. Each knotter and screen system with emissions of 0.15 kilograms or more of total HAP per megagram of ODP (0.3 pounds per ton).
NR 464.03(1)(a)3.3. Each pulp washing system.
NR 464.03(1)(a)4.4. Each decker system that does one of the following:
NR 464.03(1)(a)4.a.a. Uses any process water other than fresh water or paper machine white water.
NR 464.03(1)(a)4.b.b. Uses any process water with a total HAP concentration greater than 400 parts per million by weight.
NR 464.03(1)(a)5.5. Each oxygen delignification system.
NR 464.03(1)(b)(b) At new affected sources, the total HAP emissions from the equipment systems listed in par. (a) 1., 3. and 5. and all of the following equipment systems shall be controlled:
NR 464.03(1)(b)1.1. Each knotter system.