Tenn. Comp. R. & Regs. 1200-03-16-.28 - LIME MANUFACTURING PLANTS

(1) Applicability and designation of the affected facility.

(a) The provisions of this rule are applicable to the following affected facilities commenced on or after November 6, l988, used in the manufacture of lime: rotary lime kilns and lime hydrators.

(b) The provisions of this rule are not applicable to facilities used in the manufacture of lime at kraft pulp mills.

(2) Definitions.

(a) "Lime manufacturing plant" includes any plant which produces a lime product from limestone by calcination. Hydration of the lime product is also considered to be part of the source.

(b) "Lime product" means the product of the calcination process including, but not limited to, calcitic lime, dolomitic lime, and dead-burned dolomite.

(c) "Rotary lime kiln" means a unit with an inclined rotating drum which is used to produce a lime product from limestone by calcination.

(d) "Lime hydrator" means a unit used to produce hydrated lime product.

(3) Standard for particulate matter.

(a) On and after the date on which the performance test required to be conducted by paragraph .01(5) of this Chapter is completed, no owner or operator subject to the provisions of this paragraph shall cause to be discharged into the atmosphere:

1. from any rotary lime kiln any gases which contain particulate matter in excess of 0.15 kilogram per megagram of limestone feed (0.30 lb/ton).

2. From any lime hydrator any gases which contain particulate matter in excess of 0.075 kilogram per megagram of lime feed (0.15 lb/ton).

(4) Standard for visible emissions.

(a) On and after the date on which the performance test required to be conducted by paragraph .01(5) of this chapter is completed, no owner or operator subject to the provisions of this subpart shall cause to be discharged into the atmosphere from any rotary lime kiln any gases which exhibit ten (10/) percent opacity or greater.

(5) Monitoring of Emissions and Operations.

(a) The owner or operator subject to the provisions of this rule shall install, calibrate, maintain, and operate a continuous monitoring system, except as provided in subparagraph (b) of this paragraph, to monitor and record the opacity of a representative portion of the gases discharged into the atmosphere from any rotary lime kiln. The span of this system shall be set at forty (40%) percent opacity.

(b) The owner or operator of any rotary lime kiln using a positive-pressure fabric filter control device or a control device with a multiple stack exhaust or a roof monitor may, in lieu of the continuous opacity monitoring requirement of subparagraph (a) of this paragraph, monitor visible emissions at least once per day of operation by using a certified visible emissions observer who, for each site where visible emissions are observed, will perform three Method 9 tests and record the results. Visible emission observations shall occur during normal operation of the rotary lime kiln at least once per day. For at least three 6-minute periods, the opacity shall be recorded for any point(s) where visible emissions are observed, and the corresponding feed rate of the kiln shall also be recorded. Records shall be maintained of any 6-minute average that is in excess of the emissions specified in subparagraph (4)(a) of this rule.

(c) The owner or operator of any lime hydrator using a wet scrubbing emission control device subject to the provisions of this rule shall install, calibrate, maintain, and operate the following continuous monitoring devices:

1. A monitoring device for the continuous measuring of the scrubbing liquid flow rate. The monitoring device must be accurate within ±5 percent of design scrubbing liquid flow rate.

2. A monitoring device for the continuous measurement of the electric current, in amperes, used by the scrubber. The monitoring device must be accurate within ±;10 percent over its normal operating range.

(d) For the purpose of conducting a performance test under paragraph .01(5) of this Chapter, the owner or operator of any lime manufacturing plant subject to the provisions of this rule shall install, calibrate, maintain, and operate a device for measuring the mass rate of limestone feed to any affected rotary lime kiln and the mass rate of lime feed to any affected lime hydrator. The measuring device used must be accurate to within ±5 percent of the mass rate over its operating range.

(e) For the purpose of reports required under subparagraph .01(7)(c) of this chapter, periods of excess emissions that shall be reported are defined as all six-minute periods during which the average opacity of the plume from any lime kiln subject to subparagraph (a) of this paragraph is 10 percent or greater.

(6) Test Methods and Procedures.

(a) For determining the concentration of particulate matter and associated moisture content, the sampling time for each run shall be at least 60 minutes and the sampling rate shall be at least 0.85 std m3/h, dry basis (0.53 dscf/min), except that shorter sampling times, when necessitated by process variables or other factors, may be approved by the Technical Secretary.

(b) Because of the high moisture content (40 to 85 percent by volume) of the exhaust gases from hydrators, the Method 5 sample train may be modified to include a calibrated orifice immediately following the sample nozzle when testing lime hydrators. In this configuration, the sampling rate necessary for maintaining isokinetic conditions can be directly related to exhaust gas velocity without a correction for moisture content. Extra care should be exercised when cleaning the sample train with the orifice in this position with the following test runs.

(c) Visible emission observations of a control device with a multiple stack exhaust or a roof monitor shall occur during normal operation of the rotary lime kiln, at least once per day of operation. For at least three 6-minute periods, the opacity shall be recorded for any point(s) where visible emissions are observed, and the corresponding feed rate of the kiln shall also be recorded. These observations shall be taken in accordance with Method 9. Records shall be maintained of any 6-minute average that is in excess of the emissions limit specified in subparagraph (4)(a) of this rule.

Notes

Tenn. Comp. R. & Regs. 1200-03-16-.28

Original rule filed July 27, 1979; effective September 10, 1979. Amendment filed September 21, 1988; effective November 6, 1988.

Authority: T.C.A. §§ 68-25-105 and 4-5-202.