China - Liaoning Environmental Project : environmental assessment (Vol. 12 of 12) : Environmental assessment report for low concentration SO improvement project of Benxi power plant

Environmental Assessment/Analysis Reports ______ Report E0040 China - Liaoning Environmental Project EA Category B Environmental Assessment 12 of 12 September 1993 This report has been prepared by the Borrower or its Consultant  INVIROF TALB ASSESSMrElT R!E:PORT ,* 3IPVR ODF BEN'D POWE3R PL1ANT SAM JUN 0 g l99 RECEiLD Beijing Environment AsseFssent Corp'r ation * Oct. 1992 Beijing  I.~~~~~~~~~~~~~~I iiE M 4 : fft OFi 05(41 :~~~~~~~ E:7Z?TO1U7E=TAL .PALCT ASESS!!M!M C iS {~1 4 : -gi i F* )~~~~~~~~~~~~ g  The DBeijZng Environ,MEntal ; ne C^rp-ra:_er w2 :-cnrik1e for the pre-paration cr thais EnA pcrt Ccomice and checking) of Low Conccntraion SO. Control Fr-c-e-: of Benxi Power pLant. ThE fcl2oving are the key personnel: Chief manager- Ru Zhicheng Project chief: Mu Taiqi-. Technical chief: "hang Yc=-W...ing Examiner: Li Zaigcng Editor: u Ti q ir. The anticipates attended to this work a!! their qualif ication are listed as below: 'am e Professicna2. 7osition S-ecialty Li Zaigong director en-.g:reer Enviironnental senior enginear Assessment Mu Taiqi n EP section di-rector Env-iron^mental senior engineer Ch e * cal :hang Yongming senior engineer Envronrenra2 Engin--ering Li "ouliang senior engineer En- rcn; er.t management  1. Introduction *. P.-'eative Policies. Standards and !;arnagement Systt. 3. Description of Proposed Project 3.1 General of the Proposed Project 3.21 Process 3.3 I-ain Process Equip:ment 3.4 Investnient Estimation .3.5 Project Sc!hedule 4. Environnental Condition.S 4.1 General of the V!atural Erviror.-er.. 4.2 General of the Social Econor-it: 5. Environnental Impact Analysis 5.1 General of Production 5.2 ' O. di scharging during the -^ cess ! prndct -inr. 5 .2 E::ist-n Ay,ir Pollutionr .,4 Project Pclluticen Reducin7u Effect on Air Quait: 5-.' Analysis c'f Environrental Benefi-s 5.5 onavyss of Fc-ial and Eccn-nic Benefits 5.7 Conclusion - . -^ - ..-__ -r. l .d ........... _' y5- S ' t>.-- ....... ...... ' ~- --r._*- - ....... s 7. Plan for Mitiar !'-qative r-r=ts on rnh 'E-ronr:n-: 0. En.vironmental !1anage-ent ard Staff r-i-incn S. Environmenta1 i^-nitoring and upe- rv. ^-. F r^crs- 10. Involvenent. of Affected Grcurs and I-rgce.rnrenea Organizations Main Reference Document and Infdr:.ati^- .Anr.ene s  1. Introduction The city of Benxi, located in the east of Liaoning province China. is one of the main indug'rjal raw iaterial bases in the State and has contributed a great on the tiational economic development. But for the past years, environmental protection have been overlooked during the economic developrent. Therefore. air pollution in the city have been become heavily and the " missing city" is named for Benxi due to not being found from the satellite. Serious pollution do not only limit the social and economic development but threatening public health. So it is initial need to improve the environment quality. In this case, "Seven-year plan for improving major pollution sources in Benxi " have been prepared by the Municipality. The atmosphere of Benxi is serious polluted by SO.. One of the largest contributor of SO. in Benxi is Benxi Power Plant. The air quality must be improv'ed by resolving the above problem, therefore, the Low Concentration SO. Control Project of Benxi Power Plant, which is one of the he;vy pollution source in the city, have been listed in the above m.entioned "Seven-year's Plan". Based on the "World Bank Project Preparation Mission Menoria for Liaoning Environmental Project" and "Application Report for applying World Bank Loan for Liaoning Environmental Project", the Low Concentration SO- Control Project of Benxi Power Plant was determined as the eniirowmental project of Benxi which will use the loan from World Bank. The Environmental Assessment for the project is required by World Bank and Benxi EPB. The Wcsrd Bank -has asked Liaoning EPB to be responsible for the organization and review of the EA. reports. Beiji ng Environrental Assessrent Corpcrat: on cf State Hetallurgical Departnent was asked to Prepared this EA Report by Benxi Po;eft ^fi:e and. had already g.iven the. Outline of EA P.eport to Liaoning EPE in Feb. 1992. The Outline was reviewed by experts invited by LEPE and .pproved by LEPB. This EA Report was prepared based on the Pppreved Outline anrd will be subnittVd in both English and Chinese versicns. 2. Relavant Policies. Laws and Manaaement Systems The rA Report of this project was prepared acc^rd ing to the r_levant Chinese state and provincia2 law! docti-entri-is and standards, it also achieved the requirenenzs of 'W7oc-d Bank. 2.1 Relevant Policies and Laws 1) Chinese Science and Ts.-.nical Foli-y Directive -Technical Policy for Environnei.ta3 Protection 2) JWate- Pollution Ccntrol Law of _op1e's Pepuhl:c- o! China * 3) Air Pollution Cntvro3 L.aw of Fecr'2e'i ' epublic of China 4) Atmosphere Quality Standa.rd (GBE3n5-Z-S'-!  5) Requirements of Wcrld Bank: Operational Directive JJo. 4 Appendix A - Environmental Assessment OD4.01 2.2 The management system of Benxi is shown in Table 2.1. Table 2.1 Structure of Benxi Environmental Protection Management System Engineering Division:.5 Plan Division: 6 | Mi .Authority Development Section: 6 of H BBex u e S Management Division: 7 A n t power B i x a e c i f 7 Plant n i f x p E Environ- i a P 153 Propagation and Education mental 1 3B Centre: 3 iL Prottec- tio Y Sciencv e and Technology Section: 2_ 3. D tPersonnel Section: 3 3Env1ronmenta eMonltoring Station: 61 Environm.ental Science Institute: 29 + Superveision Institute : 24l 3. Description of Proposed Project 3.1 General Benxi Power Plant, specially serves the Benxi industries, take the task of power and steea.r lpply fon- najor industries and mines as well as hot water supply for heatirng so.e- urbar area of residents. The total sums of different type bcoil*.rs in Benxi 2  , _0---- ......... FIGUP.E 1 GEOGRAPHICAL POSITION MAP OF BENXI CITY PEOPLE'S REPUBLIC e OF CHINA _~~~~~~~~~~~~~~~~;z . __ v. NA  Ftqure 3.2 Rotary'Spraying Dry Method Desulphurization Process spraying electrostatic ractantb bprecipitator waste sediment ~--part recycle  Po-cr PlNr.- ar1e 15 smt10, tOta2 anr.ual coal consumption' is abou l.Snn.OnOC t. r .-jL:t will control the sroke and rebve th. ro* 7enerated fron' the lar.nrtr boilehi (40t/h) in Plant. Th. Ji-;e!t boiler is f ate in the cernter of the indu.tr,al nr.e tse. F;ur, 2., w*hich coal consumption 2O-25 t/h with 50,0on !-J g:ir fro- th.e 'astt-furnace. The. smoke will discharge to thr. ai: '1-.-vugh thc lZ2m high chirncy aft.ar dust collected by electrica: dst collector. The project is proposed to use the rotary spraying dry sm,ok. desulphurization processwhich is a simple process with ski;l;e technology. reliable operatien and high desu2phurizatio-. efficiency and suitable for exact situation of Benxi Power Plant. In this process the lime white will be adopt as absorbenrt. 3.2 Process 3.2.1 Desulphurization Process The Low Concentration SO. Control Project of 240t.h boiler vi:_ use the Rotary Spraying Fry Smoke Desulphurization Process, it's principle is based on the following chemical reactions: CaO + H.O --- CaCOH). sO. + Ca,OH)- --- CaiC., 2Sb. + 0. + ICa(ON) .-- 2CaSO. * H-O The smoke generated from. boiler wil enter th.e sp-Ci . .. adsorption tower and go through the line white which is sprayed by a centrifuge sprayiing device. The strong phys- cal and cherical reacticn will be happened: on the one side, the water in adsorbent wi" be vapoured, smoke will be cooled: on t.he c-h-- silde, the Ca'OH). in the adsorbent will be reacred with Se- _r the snoke tc cen&rate the powder solid of eaiu- Fphatear.d ca2:iu-. sulps ite etc.. the S0- renc- va& e ff cy -c f th_ rocess is above 808. Then after thTe desulphuri=_ted s=oke eill n er the electrical dust collector, the waste air wil: be exhaust"d to chinney to discharge to the atmosphere by the ex:hausting fan. the process chart is shown in Figure 3.2. 3.2.2 Lime White Making Process In order to meet the desulpurization preceFF re-quirem-ents to lime white quality and based on the 2-'"