132 



The Florists' Review 



Fbbiiuabv 10, 1921 



no theoretically perfect feed waters, 

 various treatments have been developed 

 with the idea of purifying the feed 

 water so as to eliminate the scale incrus- 

 tations. 



Filtration — Those mnterials which are In siih 

 pension may often be filtered out by use of prop- 

 erly designed Altera of sufficient capacity. Such 

 material of this character as passes into the 

 boiler may to a great extent be removed by the 

 surface blow-off. 



External Heat Treatment — Where the princi- 

 pal scale-forming material is the bicarbonati- of 

 lime, magnesium or iron, beneficial results niii.v 

 be obtained by means of the application of heat 

 to a temperature above 212 degrees for periods of 

 sufficient length to drive off the one particle of 

 carbon dioxide, leaving a mono-carbonate, which 

 is insoluble in water and which is therefore pre- 

 cipitated and removed from the feed water. 

 Most waters, however, contain material othi>r 

 than the carbonates, so that this treatment, 

 which is expensive to install and maintain, only 

 partially removes the trouble, allowing the 

 harder sulphates to be introduced into the boiler. 

 Some waters carry salts which will not react 

 to heat or other treatment and require to be 

 evaporated and condensed. Even in cases of this 

 kind sulphate of lime mny make its presence 

 known in the boiler. As shown in marine expe- 

 rience, evaporation of sea water leaves scale- 

 forming material in the water. 



External Chemical Treatment — This treatment, 

 being only partially effective, is subject to the 

 same criticism as the heat treatment. It allows 

 scale to be formed in the boiler and the liicli 

 cost of installation. Interest on this cost and tlic 

 cost of maintenance are practically wasted. Com- 

 bined external heat and chemical treatment is 

 the best system yet developed for external treat- 

 ment. If anything, it may be criticized for be- 

 ing too efficient. In plants in which it has been 

 Installed it has been found necessary to intro- 

 duce scale-making material into the tronted 

 feed water to stop the pitting of the tubes. 

 However, the principal objection to this system, 

 from the viewpoint of all but the largest plants 

 and wealthiest owners, is that its cost is pro- 

 hibitive. For the average plant the cost of such 

 an installation would at least equal the cost of 

 the boilers, while the interest and maintenance 

 costs could not be expected to be any lower. 



Internal Chemical Treatment — For many years 

 the American power plant engineer has been 

 burled under literature advocating the use of 

 various boiler compounds. The makers of prac- 

 tically all of them guarantee their product to 

 successfully remove old scale and prevent the 

 formation of new. Regardless of local condi- 

 tions, however, authorities are agreed that Ijoiler 

 compounds are not successful and should not be 

 used. 



"It will be readily appreciated from 

 the foregoing that the dense, hard scale 

 will form the most rapidly in that por- 

 tion of the tube surface which is sub- 

 jected to the highest temperatures of the 

 gases. This portion of the Ijoiler is 

 naturally found in the lower four or five 

 rows of tubes in the first pass. The 

 practice of the large central stations 

 consists of the frequent cleaning of these 

 bottom rows, together with three or four 

 of the upper rows, at each time. In this 

 way the entire boiler is cleaned at least 

 twice a year, while the lower rows are 

 cleaned every thirty to sixty days." 



^ 



/ 



4lt 



% 



BOILER FLUES 



We make a specialty of handling 

 carefully selected Boiler Flues 

 Inches in diameter and other sizes 

 for Retablntr Boilers. Also 

 Flues for greenhouse piping, etc. 



All flues are thoroughly cleaned 

 inside and out, trimmed and are 

 ready for use. General sales agent 

 for Stuttle's Patent Clamp and KU 

 bow for Joining flues— no packing, 

 DO leaks. New .Standard Pipe ana 

 all kinds of Greenhouse Fittings. 

 Kight prices and promptsbipmeot. 

 H. MCNSON 

 Est. 1898 Phone Superior 572 

 1483 M. Wells St., Ohioaso 





# 







Uentlon The Review when yon write. 



Union Grate 



A Rocking Grate that Saves Coal 



Write for catalogue and prices 



MARTIN GRATE C0.,="^ ^cSiT^ "' 



iiiiiiiiiiiiiiiiHiniiiiiiiiniii^ 



Captures Condensation Quickly 



Condensation loitering in your pipe lines means 

 actual money loss to you. It takes aU the "pep," 

 vigor, life, from your steam— makes it wet and 

 sluggish. 



Stop this waste. Give your steam a clear track. 

 Insure even heat throughout your range. 



Fisher Steam Trap 



m 



(TYPE 33) 



m keeps the pipe lines free of water at all times. | 



g Condensation is quickly sidetracked — steam has 1 



g the right of way. g 



1 Even heat and accurate regulation are easily 1 



g maintained. The last house is as warm as the first. g 



I Experience has proved the Fisher to be the i 



1 IDEAL trap for greenhouse use. g 



m The valve is closed tight or wide open. There can g 



a be no wire-drawing or leakage, as with a con- g 



J tinuous discharge type. 1 



I You should have our interesting book, "The g 



M Fisher Trap." \A(^rite for it today. g 



I The Fisher Governor Company | 



1 Home Office: 518 Fisher Avenue, Marshalltown, Iowa g 



= Agencies in all Principal Cities g 



IIll|]||||llllli!!!li|!||||i:i;iltl<!l!l''!!l"!ll!lllllllll!!III!llll!lllllllllllllllllll!!lll!lllllllllliy^ 



Mention The EeTlew when you write. 



It Lets the Florist Sleep 



Let as tell yon what one 

 win cost dellTered at 

 yonr Railroad Station. 



WRITE NOW. 



You don't havo to sit up and watch a 



GIBLIN GREENHOUSE BOILER 



GIBLIN du CO. UTICA^N.Y. 



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ESTABLISHED 1857 



S. WILKS MFG. COMPANY 



Manufacturers of 



WILKS HOT WATER BOILERS 



FOR GREENHOUSE HEATING 

 3517-3539 Shield. Art., CHICAGO, ILL. 



Mention The Bevlew when you write. 



PIPE- 



Wrought Iron of sound second-hand quality 

 with new threads and coupling. 16-ft. lengths 

 and up. Also pipe cut to sketch. We guarantee 

 entire satisfaction or return money. 



ALSO NEW PIPE AND FITTINGS 



Pf a« & Kendall, ^liT^i Newark, N. J. 



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