Document BRo00JyyJdG9Yy7B7pBb5MX2w

oldtu, ai-amped boilers. The gaa finally enters a new stack mounted on tho boiler-room extension. Water Supply, (n o similar fashion the water system includes provisions that will enable it to handle up to 720,- 000 !h per hr--the ultimate planned plant load. This water supply enters the system from two sources, condensate returns (up to 30%) and raw water (70 to 90%). Raw water comes from deepwetl pumps or city supply mains. This tie is necessary because there is a definite limit on the waters that can be drawn from the wells. A raw-water atorage tank with a floatraperated valve receives city water when the float falls below a definite level. From here the water passes through a clorifier in which the alumina clay in suspension is removed. Discharge from the clarifier undergoes a cold-' water filtering operation before admis sion to some process-heat exchangers. After gaining in temperature.from thb service the water goes through the first and second stages of a hot-process softener and 0 act of hot-water filters. It is now ready for the deaerating 7fi p,r,t < ,w 240,000-lb-per-hr steom genorotors of con- Combination burner osiembly (top poir of four) (ireteliW sorvollve design. Heot rolooje is only 14,700 Btu per cu ft # cool, oil or o combination for complete fuel fU'ibiKir 8- Main boiler-room Instrument boord offordl fireman complete control of steom generator plus set of chores for pertnenent records on vital equipment performance heater and then the boiler feed pumps. Condensate returns to its own storage tank, and leaves from there for the deaerating heater where it joine the makeup water supply. A live-steam burner gave a different flame ahapo-- one much shorter. This permits more complete combustion within the present furnace without danger from impinge ment. Extended WetevweM. Fan capacity (or the new conditions was adequate. The only modification was a change in the gear reducer to meet the increased load and a different admission nozzle for in creased speed In the steam turbines driv ing the (ana. Some changes bad to be made in the waterwal) supports for the new tube lengths. No change in tube diameter was made. The extensions were welded to the old tubes and rolled into the new headers. A 45-deg separation plate at the gas outlet from the boiler convection surface directs the outgoing gas into the mechanical dust collector. From there it enters the air heater, and through In duced-draft fan and breeching goes to a 200-ft.chimney. All these steps are only part oi a fullscale boiierhouse modernization. That modernization, made necessary by a rapidly growing demand for steam, has been founded on a conservative, soundly engineered new atcam generator. This unit and another to follow are rated ot 240,000 Ih per hr at 630 psi, 700 F. A common header receives the eutpii of both the new and older boilers, ll' furnishes steam for two 2000-kw bstl-j astern West Virginia, southern Penn sylvania and ell ol Maryland. From pressure turbine-generators, fan ssfl this survey they drew up a coal-analysis feed pump drives and two iedudi|; ji nage desirable to purchase, Table I, valves. Additional lurbine-generstofl] sod selected an average eastern bitu are planned. Exhaust from these tor! minous coal with characteristics in bines and output from the reduciifll Table II. This fuel served os 0 basil valves enter a l&O-pai process hetdti.j sround which to design a new steam Two reducing valves at this level briti) steam to (1) 10-psi process line (l)j deaerator end hot-process softeners. .j fuel Solacllon. Before any selectsasj of design for the new boiler was msiel generstor. Each element of that generator re ceived the same thorough, sound reasotting. For instance, the furnace has beta designed to burn a coal with an line from the 150-psi header supplies ash-softenlng temperature of 1950 F, at a heat release of 14,700 Btu cu ft per hr. The pulverizers, fans and other iux- through a reducing valve enough steam to hold the deaerator pressure at 5 to 10 psi. A line from the deaerator-goes to tliaries are built with a margin for over the first stage hot-process softener, load. In fact, this unit has already where most heating (a done and air U produced up to 300,000 lb per hr with vented. no noticeable difficulty. Provisions have Feedwater Treatment. These hot- been made for oil-burning as well as for process softeners serve chemical feed- coal. water treatment. Feeder lines, direct A mechanical dust collector has been to the boiler drums for phosphate and located after the gag outlet from the to the deaerator for sulphite, are in* boiler convection section end before the . Malted in the event such chemical treat air heater, a spot similar to that in the ment la temporarily required. the U. S. Industrial Chemicals, l**j considered all coal fields in north PRINCIPAL POWER-PLANT EQUIPMENT Curtis Day, Md. Plant ot U. S. Industrial Chemicals, Ino I--Coal-Ajialysb Range, Pcrehasable Moisture Volatile Mioimum Ofex/mura Plied earboa Aih Sulphur 8tu Puiloo temperature H.OOO WOO Prtdealntting 2-1 \ 2S-J6 lis-ai 00-70 M2 2-5 I2.S00-IS.500 2100-2400 66 (70) II--fuel Analysis as Design Basis (/Itimate analyst* He- s.l N -- 1.4 C--72.1 8-- 1.7 O-- 4.1 Moisture--4.9 Aeb--II.Q Proximate ana/gfii 8tu/lb--12.727 Mofetarc-^.S Volatile--29.21 Carbon--54.79 Alb--10,18 Seftanins temp aab--1950 P Hardfrove |rlnSaliilltf-i) POWER * Fobruery I**) 5TUls<tKtaATmO EQUIPMENT] 240,000 lb per hr. 0S0 pal. 700 P. ...Combustion Ea|if Co, lee wtr*n tutaiiwti t aalidng unit..........................Combustion En*rj Cq. lac SD*,m- ^ bawl-mill type, *6?#ulh loo metb......................................Raymond Puleerleer Dl* * RO tppe, cemblestlcn. coal, U..Combuatlen Bairs Co. toe turT}'4lfftreoils1.preteura type........................Peabody Bncrg Corp Yerki ** cod forced, turbine driven.......... B P fiiurtevtnt Die Cembj*!*' *. 020-pci (team eihaoitt st 150. .Terry Stssm Turbloe Co Ota, 7*1, <00tret. 2. compressed-air operated.................. Hasan Corp . w,,t4r. 1, preatnt bcilere 100,000 lb of gaa per hr, '.......................................................... .............. Pr.l-D.nl.l Cot t yQu._ *c*Br-1, new boiler, mecheoleal, tabular--Buell BnfTf Co, Inc ................................................................................... ............ Bailey Meter Co . **". r*ordi|. II point..........................Lend* A Northnip Co Febiuory 1040 & Recorder*, CO*........................................................................... The Hays Corp Regulator*, feedwater, 2-element and S-elament....Bailey Meter Co Water-loval Indicator........................................Reliance Qawfc Column Co Water columns. bUcoler........................ Diamond Power Specialty Corp--` Scot blower*, sequential system 00 new: do-elatflni. etc, on eld ......................................................Dlsmond Power Specialty Corp PUMPS AMO WATER CTCtli Feedwater, I, 700 gpm, turbine-driven, differentialpressure control ..............................................................In|eroM-Raad Co Turbine, |, 6JO-p*i supply steam eehiuits to 150 psi,.,..,................ ........................ .....Terry Steam Turbina Co Deaeratlns Keatar, l. 720.000 lb par hr. 5 to 10 pel....Tha Porautlt Co Water eoftensr, I, hot process, 2 state, 500,000 lb per hr..................................................................... Cochrane Corp Clarifier, l, cold water. I stale, 15,000 sal per hr.................. lofilco toe * (H| 67 1111