1、I) A-A-50566 M 9038054 0000325 790 INCH-POUND A-A-505 66 Mav 25. 1998 SUPERSEDING 29 August 1986 MIL-M-29 190A(YD) COMMERCIAL ITEM DESCRIPTION MONITORING DEVICES, EMISSION; STACK RELATED The General Services Administration has authorized the use of this commercial item description for all Federal ag
2、encies. 1. SCOPE. This commercial item description (CID) covers emission monitoring devices for exhaust smoke stacks. 2. CLASSIFICATION. The monitoring devices shall be of the following types and classes, as specified (see 7.2): TYPE Type I - Opacity monitor. Type II - Sulfiir dioxide monitor. Type
3、III - Nitrogen oxides monitor. Type IV - Sulfur dioxide and nitrogen oxide monitor. Type V - Oxygenmonitor. Type VI - Data monitor. Class A - Chart recorder. Class B - Data acquisition system. Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may imp
4、rove this document should be sent to: Commanding Officer (Code 15E2), Naval Construction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 6630 Li
5、censed by Information Handling Services A-A-505bb M 9038054 O000326 627 A-A- 5 O 5 6 6 3. SALIENT CHARACTERISTICS. 3.1 Description. Continuous emissions monitoring (CEM) of gases and particulate matter from smoke stacks is accomplished by monitoring devices which analyze gas samples. These monitorin
6、g devices ensure that emissions are at acceptable levels and that combustion efficiency is at optimum levels. Emission monitoring devices include stack probes and opacity monitors. CEM analysis provides real-time readout of temperatures, pressures, flows, voltages, and currents, in addition to gas c
7、oncentrations. Data is processed through acquisition and handling systems. Types II, III, and IV monitors with automatic calibration shall be used in larger plant installations (250,000,000 British thermal units tu) (263 764 O00 kilojoule (kJ) and larger) and should not be ordered for smaller plants
8、. 3.1.1 Performance. When required by plant size to be monitored, the monitoring devices shall be in conformance with federal, state, and local regulations in effect on the date of invitation for bids or request for proposal. Routine maintenance, repair, and replacement of component parts and module
9、s shall be capable of being performed by journeyman boiler plant operators and journeyman electronic technicians. Monitoring devices specified for use on 250,000,000 Btu (263 764 O00 kJ) and larger plants shall meet the requirements of 40 CFR part 60, appendix B, performance specifications 1,2, and
10、3. Installation, plant size, location, duct/stack type and diameter, gas temperature range, corrosive components, condensate, surface and distance between the sensor(s), control unit(s) or data acquisition system shall be as specified (see 7.2). 3.2 Standard commercial product. The monitoring device
11、s and data acquisition systems shall, as a minimum, be in accordance with the requirements of this CID and shall be the manufacturers standard commercial product. Additional or better features which are not specifically prohibited by this CID but which are a part of the manufacturers standard commer
12、cial product, shall be included in the monitoring devices and data acquisition systems being furnished. A standard commercial product is a product which has been sold or is being currently offered for sale on the commercial market through advertisements or manufacturers catalogs or brochures, and re
13、presents the latest production model. 3.3 Interface. A monitoring device specified for one location shall be compatible with same make monitoring devices of other types at that location. When specified (see 7.2), the monitoring device shall interface with existing equipment. The makes, models, and t
14、ypes of existing monitoring devices shall be specified (see 7.2). 3.4 Emission monitoring devices. 3.4.1 Type I, opacity monitor. The type I opacity monitor when used in conjunction with a data acquisition system, shall as a system, conform to the requirements of 40 CFR part 60, appendix B, performa
15、nce specification 1. The system shall be tailored to perform as specified herein. 3.4.1.1 Control unit light display. The control unit shall provide a minimum of “clear,” “warning,” and “violation” display lights. Independent controls shall be provided for adjusting 2 Licensed by Information Handlin
16、g ServicesA-A-50566 9018054 0000327 5b3 W A-A-50566 warning and violation light activation from O to 100 percent opacity and O- to 90-second delay to prevent momentary false alarms. 3.4.1.2 Control unit meter display. The control unit meter display shall be analog or digital unless one type is speci
17、fied (see 7.2). If analog display is used, it shall conform to the requirements of ANSI C39.1. The scale shall be graduated linearly from O to 100 percent opacity in 2 percent increments. Ea digital display is used, it shall conform to the requirements of ANSI C39.6. The numerals shall indicate the
18、percent opacity from O to 100 percent in percent increments. The numerals shall be distinguishable at a distance of not less than 6 feet (1.82 metre). The meters shall be accurate within I2 percent of full scale. 3.4.1.3 Relay contacts. The relay contacts shall be single-pole, single throw hermetica
19、lly sealed contacts, not less than 5 amperes, 120-volt, 60 Hertz shall be provided for the visual warning signals and when specified (see 7.2), audible warning signals. The system shall warn of filter blockage, blower motor failure, window soilage, failure in the opacity monitor, and when opacity li
20、mits are exceeded. 3.4.1.4 Analog outputs. The control unit (monitor) shall provide 4-20 milliampere outputs suitable for driving type VI data monitors. 3.4.1.5 Stack mounted equipment. The stack mounted equipment, used in conjunction with the monitoring devices shall perform the measurements in sit
21、u without any sample extraction or conditioning. Stack mounted equipment shall be equipped with an air purge system providing filtered, moisture/oil free air for minimizing the amount of dirt and dust on the optical windows. Continuous long term sealed protection shall be provided for optical lenses
22、 or reflective surfaces which could be damaged or rendered ineffective due to exposure to the stack gas stream in the event of air purge system failure. When specified (see 7.2), opacity monitors shall have provisions to automatically switch to a stand-by air supply (plant air), in the event of air
23、purge system failure, and the system shall continue to monitor opacity. The air purge system shall be equipped with easily replaceable filters. The maximum stack pressure for the air purge system shall be as specified (see 7.2). Outdoor mounted systems shall be protected from the elements and inclem
24、ent weather by NEMA 250, type 4, completely sealed weather covers. The light source shall have not less than 20,000 hours of in-use life. 3.4.1.6 Mounting hardware. Adjustable adapter flanges, thermal insulating blocks, and mounting hardware shall be included for simple, precise optical alignment. 3
25、.4.1.7 Jet engine test cell. When specified for use on a jet engine test cell (see 7.2), the monitoring device shall meet the requirements for performance in accordance with the applicable part of 40 CFR part 60. 3.4.1.8 Calibration. When required by federal, state, and local regulations, the monito
26、ring device shall perform automatic on-stack zerokpan calibration without requiring personnel check and at selected intervals in accordance with local CFR requirements. A manual override at the control unit shall permit manual activation for zerohpan calibration at any time by the operator without 0
27、 3 Licensed by Information Handling Services A-A-50566 OL8054 0000328 4TT = A-A-50566 boiler shutdown. The opacity monitor calibration error shall be not greater than 3 percent opacity. Zero and calibration drift shall be not greater than 2 percent opacity in 24 hours. Response time shall be not gre
28、ater than 90 percent in 10 seconds. 3.4.2 Type II, sulfur dioxide monitor; type III, nitrogen oxides monitor; and type IV, sulfur dioxide and nitrogen oxides monitor. The type II sulfur dioxide, type lII nitrogen oxides monitor, and type IV sulfur dioxide and nitrogen oxides monitor used in conjunct
29、ion with a type VI data monitor, when required, shall as a system, conform to the requirements of 40 CFR part 60, appendix B, performance specification 2. 3.4.2.1 Calibration. When required by federal, state, and local regulations, the monitoring devices shall perform automatic on-stack zero and spa
30、n calibration at selectable intervals of 1,2, 4,8, and 24 hours. A manual ovemde at the control unit shall permit manual activation for zero and span calibration at any time by the operator. 3.4.2.2 Control unit light display. The control unit light display shall provide no less than “warning” and “
31、violation” lights. Independent controls shall be provided for adjusting warning and violation light actuation from O to full scale parts per million (pprn) and O- to 90-second delay to prevent momentary false alarms. 3.4.2.3 Control unit meter display. The control unit meter display shall conform to
32、 the requirements of 3.4.1.2 except that graduations shall read ppm with not less than two switch selectable ranges, Le., O to 1000, O to 3000 ppm. Range of meter shall be as specified (see 7.2). 3.4.2.4 Relay contacts. The relay contacts described in 3.4.1.3 shall be provided for visual display and
33、, when specified (see 7.2), audible warning signals. 3.4.2.5 Analog outputs. The control unit (monitor) shall provide 4-20 milliampere outputs suitable for driving type VI data monitors. 3.4.2.6 Stack mounted equipment. The monitoring device shall perform the measurements in situ. Ifthe measurement
34、technique is variable with stack gas temperature, the measurement output shall automatically compensate for these variations. The monitor shall also measure stack temperature. Stack and outdoor mounted components shall be protected from the elements and inclement weather by NEMA 250 type 4 completel
35、y sealed weather cover. 3.4.3 Type V, oxygen monitor. The type V oxygen monitor used in conjunction with a type Vi data monitor, when required, shall as a system, conform to the requirements of 40 CFR part 60, appendix B, performance specification 3. The monitor shall perform the measurement in situ
36、, without any sample extraction or conditioning and shall be capable of providing automatic trim control and providing increased response with decreased oxygen in the stack. 3.4.3.1 Calibration. When required by federal, state, and local regulations the monitor shall perform automatic on-stack zero/
37、span calibration without personnel check and at selected intervals in accordance with local CFR requirements. A manual override at the control unit shall 4 Licensed by Information Handling Services A-A-50566 m 901805L1 0000329 336 m A-A-50566 permit manual activation for terohpan calibration at any
38、time without boiler shutdown. Calibration error shall be within f 0.2 percent and the response time shall be 90 percent in 8 seconds. Zero/calibration drift shall be not greater than 0.3 percent over a 24-hour period. 3.4.3.2 Control unit light display. The control unit light display shall provide n
39、o less than low oxygen, early warning, and alarm. Independent controls shall be provided for adjusting “warning” and alam” light activation from O to full scale, and O- to 90-second delay to prevent momentary false alarms. 3.4.3.3 Control unit meter display. The control unit meter display shall conf
40、orm to the requirements of 3.4.1.2, except that graduations shall read O to 20.9 percent oxygen in 0.1 percent increments (see 7.2). 3.4.3.4 Relay contacts. Relay contacts described in 3.4.1.3 shall be provided for visual display and, when specified (see 7.2), audible warning signals. 3.4.3.5 Analog
41、 outputs. The control unit (monitor) shall provide 4-20 milliampere outputs suitable for driving type VI data monitors and fuel/air controller. 3.4.3.6 Stack mounted equipment. Stack and outdoor mounted components or systems shall be protected from the elements and inclement weather by NEMA type 12
42、or equivalent, completely sealed weather covers. 3.4.3.7 Probe. The stack probe shall be equipped with industrial duty flame arrestors to prevent flame propagation and flash-back in the probe unit. The probe shall extend not less than one-third of the diameter of the stack or duct, at the point of m
43、easurement. The probe shall be corrosion- resistant and include filter, deflectors, and/or airfoils to minimize accumulation of particulates from the process gas. 3.4.4 Type VI data monitors. The type VI data monitors, when used in conjunction with the type I through type V monitors, shall as a syst
44、em, measure the output from the monitors and record the data and generate reports when required by applicable federal, state, and local agencies without operator interventi on. 3.4.4.1 Class A, chart recorder. The recording chart shall move no slower than 0.75-inch per hour (19.05 millimetre (mm) pe
45、r hour) and be of sufficient length for not less than a 31-day continuous record. The movement of the recording mechanism shall be free and smooth and the pen shall produce a continuous record. Means shall be provided for adjusting the zero-position of the pen point and for minor recalibration. The
46、pen shall be for marking on chart paper and shall not abrade the chart. Means shall be provided to move the pen away from the chart and to prevent it from returning to the chart until manually returned. The overall accuracy of the recorder shall be within 2 1.5 percent of full scale. 3.4.4.2 Indicat
47、or. The recorder shall incorporate a separate indicating pointer or colored band(s) with a scale not less than 6 inches (152 mm) long, or a 5-digit display with 2 decimal places. 5 Licensed by Information Handling Services A-A-505hh W 9018054 0000330 058 W A-A-50566 Digits shall be not less than 1.0
48、0-inch (25.4 mm) high of color to contrast with surrounding background. 3.4.4.3 Pen-movement mechanism. The pen-movement mechanism shall be actuated by mechanical or pneumatic power transmitted by direct mechanical or pneumatic connection from the analyzing system. The mechanism can also be actuated
49、 by electrical power controlled by a signai from the analyzing system in such a way that performance shail be within the limits specified. 3.4.4.4 Pneumatic transmission. When required in the design, the connectors and other fittings shall be of a type which allow joints to be made leakproof without putting strain on the equipment. 3.4.4.5 Electricai recorders. Electrical recorders shall operate when activated by a signal from the analyzing system without appreciable lag. The electrical recorders shall position the recording and indicating element without c
