US791963A - Surface condensing apparatus. - Google Patents

Description

No. 791,963. PATENTED JUNE 6, 1905.

W. WEIR.

SURFACE GONDENSING APPARATUS.

APPLICATION FILED JULY 22, 1904.

w 7W: J5 Mum/7.0K flak/7% Zr ,m' 4771: ENE/ Patented June 6, 1905.

PATENT OEEicE.

WILLIAM IVEIR, OF CATHOART, SCOTLAND.

SURFACE CONDENSING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 791,963, dated June 6, 1905.

Application filed July 22, 1904. Serial No. 217,691.

To (LZZ whom it non/y cancer/r:

Be it known that 1, WILLIAM W are, a subject of the King of Great Britain and Ireland, and a resident of Cathcart, in the county of Renfrew, Scotland, (whose postal address is I-Ioliu Foundry, Cathcart, Renfrewshire, Scotland,) have invented certain new and useful Improvements in Connection with Surface Condensing Apparatus, (for which I have applied for a British patent, No. 22,708, dated October 21, 1903,) of which the following is a specification.

My invention has for its object to attain in a more economical and efficient manner a high vacuum in surface condensers used in conjunction with marine or other steam-engines, but more particularly in conjunction with marine steam-turbines, wherein the maintenance of a high vacuum is necessary to attain high efficiency and economy.

My invention is applicable to surface condensers of the ordinary marine type, and in carrying out my invention there is connected to the condensers a beam or other recognized type of independently-driven air-pump to deal with the water of condensation and also with a portion of the air and attain thereby a moderate vacuum. This pump I term the main air or water pump. To the suction-passage of this pump there is attached a pipe or air vessel, with a connection to a supplementary or dry-air pump, the connection being made at such a level as will prevent this supplementary pump from drawing any water. This sumilcmentary or d ry-air pump may be of any of the recognized types of dry-air pump and may be fitted with either direct-injection or water-jacketed cooling arrangements. With this combination of air-pumps in connection with a surface condenser the withdrawal of the water and also a moderate vacuum are attained by the first pump, and with the addition of the supplementary pump a high vacuum is attained in a more economical manner than has hitherto been possible.

In order that my invention and the manner of performing the same may be properly understood, I hereunto append a sheet of explanatory drawings to be hereinafter referred In carrying out the invention the surface condenser A employed is of the ordinary marine type, having an inlet B for the exhaust-steam from the engine in connection with which it is employed and an outlet G for the water of condensation and air. The outlet 0 is connected by a pipe D with the suction branch F of a main pump E, preferably independentlydriven by an engine E. This pump E deals with the water of condensation and with a portion of the air, and thereby secures a moderate vacuum. It may be termed the main Water or air pump and may be of any suitable form. An air vessel G extends up from the inlet branch F of the main pump E, and the upper end of this vessel is connected by a pipe H with a supplementary or dry-air pump J, the pipe connection being preferably at such a level as to prevent the supplementary pump from drawing any water under normal working conditions. The pump J may be of any of the known types of dry-air pump fitted with a Water-cooled jacket connected by a pipe and valve R with any convenient source of watersupply, and it is arranged above the cylinder of a steam-engine K, the bucket of the airpump J being worked by a prolongation of the engine piston-rod L. The engine K may, as shown, be that used to drive a centrifugal circulating-pump M for circulating the cooling-water through the condenser A, the water entering the condenser at N and leaving it by' the outlet P, as usual.

When in operation, not only does the independently-driven main pump E draw the condensed water and air from the condenser A and secure a vacuum in the condenser, as usual, but the dry-air pump J also acts as an auxiliary or supplementary pump and withdraws a proportion of the air which would otherwise require to pass through the main pump E, and this combination, therefore, not only insures an increased vacuum in and more efficient action of the condenser, but also admits of the main pump E being of a smaller size than if it had to deal with the entire volume of water and air.

What I claim as my invention is 1. In surface condensingapparatus, in combination, a condenser, three separate and independent pumps comprising a circulatingpump for the coolingwvater, a main water and air pump for the condensed vapors, adapted to maintain a partial vacuum in the condenser, an air vessel on the suction side of the second pump, and a dry-air pump connected to the air vessel, and adapted to with draw a proportion of the air which would otherwise require to pass through said second pump.

2. In surface condensing apparatus, in combination, a condenser, three separate and independent pumps comprising circulatingpump for the cooling-water, a main water and air pump for the condensed vapors, an air vessel on the suction side of said main pump, a supplementary air-pump connected at its suction side to the air vessel at such a level as to prevent the supplementary pump from drawing water of condensation and having a- WILLIAM VV-EIR.

W itnesses:

DAVID FERGUSON, WILFRED HUNT.

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