Georgia - Power Rehabilitation Project : environmental assessment

OCT. i.1996 7:36PM P 2 'ROM MINISTRY FOR FUEL & ENERGY PHONE NO. :995 32 77045 E-213 To: Mr. G. Badurashvili The General Director of the State Power Enterprise "Sakenergogenerationr" of the Ministry of Fuel and Energy In accordance with your letter #24-07/71 dated 22.08.96 the State Department of Environment has carried out preliminary examination of the influence on the environment of the Unit 10 at the Gardabani Thermal Power Plant. According to the terms of reference the amount of emission of poisoning substances (sulfuric anhydride,nitrogen dioxide,vanadium tetroxide) if the Unit operates, has been calculated and estimated, reference to the percentage of the sulphur in the liquid fuel with the variation from 1 to 4. It was clarified that in the case 'of the Unit operating using 41 mazout, (40k air, 601 mazout) total ntitrogen and sulphur concentration would be 0,3 possible limit rate. Using of the 1,2 and 3* mazout at the Unit 1O will cause any serious pollution of the atmosphere. Proceed froom the above mentioned the State Department on Environmental issues find it possible to implement the rehabilitation project of Unit t10. Attachment: see page 76. Acting department chiefz S.Gulisashvili .~~~~.  ROM: MINISTRY FOR FUEL & ENERGY **PHONE N1 99 7:327P P 3 THE MINISTRY OF ENVIROMENT AND NATURAL RESOURCES PROTECTION OF GEORGIA. STATE ECOLOGICAL EXAMINATION DEPARTAMENT. PRELIMINARY ESTIMATION ON ENVIROMENT IN CASE OF REALIZATION OF COMPLETE REIABILITATION PROGRAM OF UNIT 10 IN GARDABANI THERMAL POWER STATION. TBIUSi' 1996  FROM 11 TINISTRY FOR FuLJ & ENGY OCT. 1. 199S6 7:7PP 4 POENO. 9S -3 704 According to Terms of Reference, appropriate calculation during he operation of block No. 10 in Gardabani Thermal Power Station to deterrmine the pollution level of 3 main ingredients ,exhausted in atmosphere ,have been made. Calculations were made for 4 occasions {sulfur composition in mazut 1,2,3, and 4%}.The maximum surface concentration of hazardous substarces in maximum allowed concentration (MAC) is enclosed in diagram. The diagram analyses indicates that block No. 10 by pollution point carries in significant influence on the annosphere. 9; Substance N0 80 V20, Total Influience 1 0 .2 0_ _ __ _ __ _ _ _ _ _ __ _ __ _ _ __ _ _ 2 .2__ _ __ _ __ _ 0__ _ _ _ _ _ _ _ _ _ _ _ _ 3 0.2 0 0 4 0.2 1 0.1 0__ .1 0.3 Besides, for determination of total pollution of atmosphere during simuneous operation of blocks 3,4,8,9. and 10, the calculation has been done. The infuence of unit 0 In Gardabani Thermal Power Station on atmosphere_ On the basis of Terms of Referenc in case of pu ,ing into operation 10 unit of Gardabani Thermal Power Staion ,to determine atmosphere polltion level by exhausted hazardous substan=cs, calculations were completed for diferent types of mazut-sulfur composition 1,2,3.and 4%. It was taken into consideration. tbat unit 10 will use the mixmre of natral gas and {az6t.{60% gas, 40% mazrt.) Units 3 and 4. boiler type TGM-94, steam capacity 500t/h are attached to one chimney stk, with heigh 120m, diameter Sm. The boilers operate on mazut, which consumes 36,9 t/h.The calculation been done for differen types of mazmt-sulphur composito 1,2.3.and 4% ITe capacity of substances, ejectd from chimney stack 1, during 1% mazut combustion's: SO2 -388,9g/sec; NO2 -183,4g/sec; V1 0 -1.1 g/sec Other figures for sulphur composition in mazut are: 2% SO2 - 833,4 g/sec NO; - 183,3 g/sec V205- 3,03 g/sec 3 % SO2 - 1222 g/sec NO2 - 183,3 g/sec V205 - 4,8 gisec 4 % S02- 1611 g/sec NO2- 177,8 g/sec V205 - 6,7 g/sec Unit 8. boiler type TGM-94,with steam capacity 500tlh, is attched to chimey stack  FR'OM: MINISTRY FOR FUEL & ENERGY OCz. 1.1r6 7:37PM P S PHONE NQ. 995 32 77W45 2,{height-180m, dianeter-7,2m} .operates on mazut, consumes 37,6tJhbThe other composition of sulfur in mazut are: 1% S02 -194,5 g/sec NO2- 91,7 glsec V205 - 0,6 g/sec 2% S02 - 416,7 g/sec N02- 91,7 g/sec V205 - 1,5 gfsec 3% S02 - 611,2 g/sec NO2- 91,7 g/sec V205 - 2,43g/sec 4% SO2 - 805,6 g/sec NO2- 88.9 g/sec V205- 3,3 g/sec Unit 9, boiler type TGMP-344A, with steam capacity lOOOt/h,is amached on chimney stack 3,{height -270 meter, diameter-9,7 meter.} operates on gas,consumption of which is101,6 thousand m3nh.N03 eruption capacity is 250g/sec. Total capacity of ejection for chimney 3 {for units 9 and 10},is: 1% SO2 -194,5 g/sec N02- 472,2g/sec V205 - 0,6 g/sec 2% S02 - 416,7 g/sec N02- 472,2glsec V205 - 1,4 g/sec 3% SO2 - 611,2 g/sec NO2- 472,2g/sec V205 - 2,44g/sec 4% S02 - 805,6 g/sec NO2- 470 g/sec V205 - 3,4 g/sec The 1992 data is used on the report. Excess air ratio is a - I 1. Cavitation atomizers are installed on the boilers of 3,4,and 8 units, and p2arecbaril- on the units 9 and 10, that's why B2-0,85. The ratio for units 3,4,and 8 is K=8,5 but for unis 9 and 10 K - 10. Waste gas temperaere for chimney stacks 1 and 2 is 162