Document OvV3j9wkk4nJdKm0bNdk9Yvw

No More Flyash . After spending money for year in trying to stop flyash in a residential neighborhood, plant manager installs air lets, to staggered that they swirl the sawdutt frs the furnace CEDAR FUEL It examined by plont superintendent H Kendotl as ft's drawn Mia the duet. It wo* the coarser particles thot com out of stack unburned, pave trouble "Stop toon soot from spoiling my wash," jelled to excited voice into the phone. ''Stop It this minute or I'll sue you--I've stood about enough." Then the receiver banged down before the firm's telephone operator could say a word. So she called Henry C Kendall, plant superintendent, es she had done so many, many, many times. Kendall is the youthful, good-natured superintendent of Ceorge C Brown A Co, Creentboro, N. C. This firm is :he world's largest manufacturer of eromalic red-cedar products. Their four major products are: closet lining, ve neer for cedar chesia, cedar oil and dog bedding. Flyash Trouble. Like most plant soperioiendcfll^ Henry Kendal] was up to his esrs in work lhat-morning. Tele phone calls from irate neighbors were commonplace, because the plant is in a semi-residential neighborhood. What irked Mr. Keodall about these calls was that he had been experimenting and spending a lot of money, for years, in trying to stop that flyash. But this time the firm was about to be sued, and some thing drastic had to be done. Main Oelfor for this plant la a 350-hp longitudinal-drum airaight.iube design, carrying 155 psi, operating at 10,000 Ih of steam per hour. It burns about 25 tons of sawdust and ground shavings in 24 hours, or about one ton per hour. Boiler, installed in 1927, operates on natural draft through three ashpit doors. Sawdust is burned In the large dutchoven built onto the furnace front. Air passes through the grates to dutch oven. The wood fuel drops in through two ports in oven's roof, sketch, p 135. Fuel piles Into form of huge cone on top of grates and burns rapidly. This fuel comes from cutoff saws, rip saws, end band resaws. Fuel is composed of shavings, sawmill dust and waste thst's hogged up. Screens on iqel bog thst chops up fuel have ^fi-ineh openings, it was these larger hogged pieces. thst came out of the stack as charcoal end spread over the neighborhood. Trouble was there wasn't enough air to bum pieces inside the furnace completely while they veto suspended. Process Steam. Steam from boiler has four main uses. Its chief use is distilling oil from the cedar aawdust before the fuel la burned. Waste i ground and then put In vets where it Is saturated with steam. Steam carries oil through condensers where the oil and water separate. Left photo, P 1& shows one of 19 vets. Each is 5 ft 1 diameter end 12 ft high. Each uses 32S lb of steam per hour, which adds up- 134 PUNT OPERATION AND MAINTENANCE SECTION povrt* . Steam enters the vat's double bottom t 3 psi and blows up through 2000 l/16-in. site holes, into sawdust. After about 14 hours, 60 lb of expensive "oil No Mora Flyash. Once Henry Kcodoli got on the right track, his flyash prob lem was quickly solved. Ho installed an overfire air system, see the photo at times, but not one complaint has come from fussy neighbors. Rotuhi. Henry Kendall is right pleased with this setup. But be Is too busy with production to be kept in the of cerforwood" are distilled. The sawdust fuel, containing about 35% moisture Is then dumped. From there, fuel goes to the dutch oven to be burned. There l> more fuel then die miff ocedi, so efficient firing is no problem. Bat there must be no smoke or flyash to pollute the air. Ami that does call lor careful firing. Kilns for drying the rough-sawed cedsi boards use steam at 145 psi. There ate two doubie-trock kilns. Finned pipe and pipe coils keep them at ISO F. Humidity and temperature in each kiln ate automatically controlled. Another use for steam is building beating. Steam it also used for the veneer dryers in this busy plant. right above. An air blower is mounted outside the boiler room. It's connected with a U- shaped, 6-inch line, teaching from the boiler front around ita side. Air from the blower enters this header el the boiler's front. Ten IV-fn. lines carry the air from each side into the dutch oven and Into the first post of the fur nace. The ten jets of air shoot into the fur nace, 30 laches lower on One aide than the other. This gives a swirling-action to the afr so it agitates the unburnod wood particles In suspension. Thst holps them burn completely before leav ing the furnace. Since jets were in stilled, some flyash has been noticed et boiler room. Henry started out in gen eral cabinet work, then built truck bod ies. Next, he joined a miliwork shop and ended up as a pattern maker. Before coming with Ceorge C Brown A Co he owned a half interest in a cabinet shop. So you con tee he came up the herd way and doesn't let e tough probtem stop him. Now he has a bright, young college graduate, Ferriil Puckett, os on as sistant. With the flyash problem licked, both men ere concentrating on increas ing production. They're also working out a preventive maintenance program that wilt keep their mill out there lo front, es the leader in their field. ocrpacit 1953 PUNT OPERATION ANO MAINTENANCE SECTION 05