326 IAC 10-3-2 - Definitions

Authority: IC 13-14-8; IC 13-17-3-4; IC 13-17-3-11

Affected: IC 13-11-2; IC 13-15; IC 13-17

Sec. 2.

For purposes of this rule, the definition given for a term in this rule shall control in any conflict between 326 IAC 1-2 and this rule. In addition to the definitions provided in IC 13-11-2 and 326 IAC 1-2, the following definitions apply throughout this rule unless expressly stated otherwise or unless the context clearly implies otherwise:

(1) "Blast furnace gas fired" means deriving at least fifty percent (50%) of its total heat input from the combustion of blast furnace gas during the ozone control period.

(2) "Boiler" means an enclosed fossil or other fuel-fired combustion device used to produce heat and to transfer heat to recirculating water, steam, or other heat transfer medium.

(3) "Clinker" means the product of a Portland cement kiln from which finished cement is manufactured by milling and grinding.

(4) "Continuous emission monitoring system" or "CEMS" means the total equipment necessary for the determination of a gas or particulate matter concentration or emission rate using pollutant analyzer measurements and a conversion equation, graph, or computer program to produce results in units of the applicable emission limitation or standard.

(5) "Long dry kiln" means a Portland cement kiln fourteen (14) feet or larger in diameter and four hundred (400) feet or greater in length that employs no preheating of the feed. The inlet feed to the kiln is dry.

(6) "Long wet kiln" means a Portland cement kiln fourteen (14) feet or larger in diameter and four hundred (400) feet or greater in length that employs no preheating of the feed. The inlet feed to the kiln is a slurry.

(7) "Low-NO_x burners" means a type of cement kiln burner system designed to lower NO_x formation by controlling flame turbulence, delaying fuel/air mixing, and establishing fuel-rich zones for initial combusting, that for firing of solid fuel by a kiln's main burner includes an indirect firing system or comparable technique for the main burner to lower the amount of primary combustion air supplied with the pulverized fuel. In an indirect firing system, one (1) air stream is used to convey pulverized fuel from the grinding equipment and another air stream is used to supply primary combustion air to the kiln burner with the pulverized fuel, with intermediate storage of the fuel.

(8) "Malfunction" means any sudden, infrequent, and not reasonably preventable failure of air pollution control equipment, process equipment, or a process to operate in a normal or usual manner. Failures that are caused in part by poor maintenance or careless operation are not malfunctions.

(9) "Mid-kiln firing" means the secondary firing in a kiln system by injecting solid fuel at an intermediate point in the kiln system using a specially designed feed injection mechanism for the purpose of decreasing NO_x emissions through:

(A) burning part of the fuel at a lower temperature; and

(B) reducing conditions at the fuel injection point that may destroy some of the NO_x formed upstream in the kiln system.

(10) "Ozone control period" means the period as follows:

(A) For 2004, beginning May 31 and ending on September 30, inclusive.

(B) For 2005 and each year thereafter, beginning May 1 of a year and ending on September 30 of the same year, inclusive.

(11) "Portland cement" means a hydraulic cement produced by pulverizing clinker consisting essentially of hydraulic calcium silicates, usually containing one (1) or more of the forms of calcium sulfate as an interground addition.

(12) "Portland cement kiln" means a system, including any solid, gaseous, or liquid fuel combustion equipment, used to calcine and fuse raw materials, including limestone and clay, to produce Portland cement clinker.

(13) "Precalciner kiln" means a kiln where the feed to the kiln system is preheated in cyclone chambers and a second burner is used to calcine material in a separate vessel attached to the preheater prior to the final fusion in a kiln that forms clinker.

(14) "Preheater kiln" means a Portland cement kiln where the feed to the kiln system is preheated in cyclone chambers prior to the final fusion in a kiln that forms clinker.

(15) "Semi-dry pre-calciner kiln" means a kiln where the inlet feed to the kiln system is a wet slurry. The wet slurry is subsequently processed in an integrated system consisting of a dryer and a separately fired pre-calciner, which in combination, dries the excess moisture from the feed stream (using only exhaust gases from the pre-calciner and kiln), and calcines the resulting dried material before introduction into the rotary kiln. The final fusion in the kiln forms the clinker.

(16) "Shutdown" means the cessation of operation of a Portland cement kiln or affected boiler for any purpose.

(17) "Startup" means the setting in operation of a Portland cement kiln or affected boiler for any purpose.

Notes

326 IAC 10-3-2

Air Pollution Control Board; 326 IAC 10-3-2; filed Aug 17, 2001, 3:45 p.m.: 25 IR 15 Readopted filed 10/18/2024, 2:09 p.m.: 20241113-IR-326230809RFA