US978279A - Distillation system for ice plants. - Google Patents

Description

A. FAGBT. DISTILLATION SYSTEM FOB 10E PLANTS.

APPLICATION FILED NOV 33' 1909.

Patented Dec. 13,1910.

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To all whom it may concern:

UNITED STATES PATENT OFFICE.

ARTHUR FAGET, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR 'I'O PACIFIC ENGINEER- ING- COMPANY, OF SAN FRANCISCO. CALIFORNIA, A COPAR'INERSHIP.

DISTILLATION SYSTEM FOR ICE PLANTS.

.Be it known that I, ARTHUR FAGET, citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Distillation System for Ice Plants, of which the following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the saine.

This invention relates to a distillation system for ice plants, and its object is to effect an economy in the heat used for the distillation of water.

It will be noted by those familiar with the art that it is necessary to distil all water used for can icemaking, since distilled water is required for making clear, by 'enic ice. It will also be noted by those skil ed in the art that it is necessary to use a certain amount of power in an ice lant to convert the gaseous ammonia into iquid ammonia, and to car on other 0 erations about such plants, an a series 0 experiments show that the power re uired to. produce a given amount of ice wil produce only one-halt the amount of Water used in the ice plant; that is to say, the power required to run an ice-plant producing 100 tons of ice per day will be given by the evaporation of 50 tons of water under normal conditions, thus making it necessary to distil 50 tons of water in addition to the 50 tons used by the power 1 plant.

I of reference is applied to the same Certain considerations of engine runnin show that a compound engine with a hlg and low pressure cylinder, the latter ex hausting into a condenser, form the best combination for such a plant as is contemplated. Such an engine as the one mentioned, however, emulsifies and condenses withthe cylinder oil in the low pressure cylinder at least 25% of the steam supplied to it, and this emulsion is practically a total loss, for the reason that it cannot be filtered or used in the ice-making plant. This difiiculty is avoided-in this system of distillation, and the additional distilled water required is roduced with a loss of as small an amount 0 heat as possible.

The drawing, in which the same numeral or'tion throughout the several views, is a diagram Specification of Letters Patent.

Application filed November 23, 1909. Serial No. 529,590.

Patented Dec. 13, 1910.

Numeral 1 represents the boiler from which leads a pipe 2 'to the high-pressure cylinder 3. From the high-pressure cylinder 3 the exhaust leads to a re-heater 4, said re-heater being kept under a temperature of approxlmately 360, depending, of course, upon the precise steam pressure maintained therein. The exhaust steam from the highpressure cyllnder, after passing from the re heater, will be substantially the same in temperature as the steam in the boiler at the time it leaves the boiler. The steam then passes through a pipe 5 to the lowressure cylinder 6, from which it is ex austed t rough a pipe 7 into an oil se arator, and then to a condenser 8, said con enser being maintained at a sufliciently low pressure, by means of a dry vacuum pump 9. Ordinaril 1f the steam from the high-pressure cyl- 111 er is allowed to cool ofl, and pass to the low-pressure cylinder, the oil carried there- 12 leading from the boiler 1, and such an amount of steam is ermltted to pass through this as will pro ace the additional water required for the ice-making plant, above that su plied by the engine system. The steam, a er passing through the re heater, is passed to the feed-water heater 13 through a pipe 14. This heater is maintaine at a temperature of about 340 at one end, and 280 at the other, the steam then passing through a pipe.15 to a-second heater 16, which latter is maintained at a temperature of approximately 280, other operations of the ice-plant bringing the temperature of the feed-water at the entrance to the heater up to. about 200. The feed-water is passed i into the heater'lti through-a; pipe'17, and at a temperature of about 200, and passes therefrom at about 280, at which temperature the insoluble carbonates-begin to become flocculent and-are-removed fromthe water by means of a filter 18, which latter is connected with the reheat'er 13'," inwhich the feed-water is still. further heated, leaving the latter at atemperature very nearly that of the boiler 1, the boiler 1 being fed through the pipe'19.

The steam, leaving the heater '16, passes through a pipe '20 into the vacuum'reboiler, and is discharged therein, the pump 'Qmaintaining the vacuum-in theneighborhood of 25 inches of mercury in the vacuum reboiler 111d condenser, and the heat of the steam passin from the heater S16 is sufficient to reheat the water contained in the reboller 1O enough to drive off: all undesirable -vapors. The reboiler 10 is siifliciently'i'ower than the condenser for the water to run'from the condenser into the" reboiler, through-a pipe" 21, a PipeQ-Q conneetiirg the-upperpo'rtion of the reboiler with the upper-portion of the condenser, in order to maintain each at the same absolute pressure. As fast as the Water accumulates in thejreboilerfitis removed therefrom by means of a pump '23.

-'Having thus described my invention, what I claim as neW andtiesire to secure by Letters Patent of'the United States, is as follows:

1. In a water distillation systemyasteam boiler, a-stea'm power plant, steamconnec" tions from the boiler whereby the steam used 'in the power plant -may 3 be {reheated during its assage therethrough, 'a' feedwater heater and steam-connections from the reheater-to the feed water'heater, whereby the live steam 'assing through-the reheater Will heatthe water-nearly-to thatof the boiler, as set forth,

"2. lfna wabr distiilation"system,a steam boiler, a steam power plant, steamconnections from: the boiler iitaerebythe steam may be reheated in itspass'age through the power plant, a condenser into which the power planttlischarges, afeedwater heater, a feedwater'filter, ase'centiary feed-water heater wherein the feed water is raised nearly to the.

temperature of the boiier, means to pass feed 'water 'through'each heater, and pipes whereby the steam used "for reheating the "power steam is passed through each feed water heater, as set forth.

3. In a water distillation system,a steam I boiler, a steam power plaid, steam -connections from the boiler whereby thesteam may be rehefiedin its t'ransmission throu h the power plant, a condenser into which t e fpower plant discharges, a feed-water heater,

a filter, a secondary reheater in which the feed-water 1S heated to substantially the temperature of the boiler, piping whereby the steam used for reheating the power steam will be passed through the feed water heaters and a-Vacuum boiler into which the steam the boiler,'steam connections for reheating thesteamduring its passage through the ,power plant, a water heater to which thereheater steam, connections lead,,and a Vacuum reboiler' into which the steam is discharged from the several'heate'rs, substantially asdescribed.

5. In a-waterdistillation system, a boiler, a power plant, steam connections whereby the steam used in thepower plant is reheated during its passage therethro'u'gh, a feed water heater, a connection from the re-heater to the feed water heater, a filter through which the feed-water is passed after it has been partially heated, and a vacuum reboiler into -which' the steam from V the reheate'r and'feed-water heaters is discharged, substantially as set forth.

3. In a water distillation system, a steam boiler, a steam 'powerplant, steam connections from the boiler whereby the steam is reheated in its passage through the power plant, a feed water heater," a "steam connection from the reheat'er to the feed-water heater, a feed water filter through which the feed water passes afterbeingpartially heated, and a Vacuum reboi'le'r into which the 'steaifi from the heaters discharges, as set forth.

7 In a water distillation system, a steam boiler, a steam'power lant connected with said boilei, a steam reiieater for increasing the temperature of the steam in its passage through the ower plant, steam connections from the boi er to said reheater, a condenser 'into which the power plant discharges, a

from the condenserto'the *reboil r,"'as set v forth.

s. In a wa ter distillatienssystem,-'a steam boiler, 'acompound steam power lant connectedwithsaid boiier, a steam're eater for increasing the temperature of the steam after its passagethroughthe high pressure cylinder of the engine, steam connections from the boiler to said reheater, a condenser into which the power "plant discharges, a feed water-heater, steam connections from there-heaterto the feed water heater, feed water connections from the boiler to the feed yyater heater, a "vacuum reb'oile'r, and steam connections extending from the feed water heater toand terminating in the vacu- *um reboiler, and water connections from the condenser to the re-boiler whereby the condensed water will drain into the re-boiler, as set forth.

9. In a water distillation system, a steam boiler, a compound steam power lant connected with said boiler, a steam re eater for increasing the temperature of the steam after its passage through the high pressure cylinder of the ppwer plant, steam connectlons from the oiler to said reheater, a

condenser into which the power plant discharges, a feed water heater, steam connections from the re-heater to the feed water heater, feed water connections from the feed water heater to the boiler, means to remove impurities from the feed water during its passage through the feed water heater, a vacuum re-boi er, steam connections extending from the feed water heater to and terminating in the re-boiler, and water connections from the condenser to the re-boiler as set forth.

In testimony whereof I have hereunto set my hand this 11" day of Nov. A. D. 1909,

in the presence of the two subscribed witnesses.

ARTHUR FAGET. Witnesses:

C. P. GRIFFIN, HUGH T. SIME.

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