US1063695A - Surface condensing apparatus. - Google Patents

Description

H. KELLER. SURFACE GONDENSING APPARATUS. APPLIUATION FILED JLY 15, 1909.

1,063,695, Patented Junes, 1913.A

Mtnesses: 'l' l'r'lvehtor';

' H uldreich v Kel' lecunimo speedline rA'rEN'r orrrcii. i

i i nUEnnErcE KELLER, oF aumen, SWITZERLAND, Assieme ro eENEBfAL ELECTRIC COMPANY, ri coRroEATIoN or NEW Yonx.

. screenen oormzsnsme 2P-Annees.

Specioation of Letters Patent.

Patented J une 3, 1913.

y Application md July 15,1909. Serin No. 507,684.

rEhe presentinvention relates to surface condensing systems for condensing the eX- l@ haust steam from a. turbine or other prime rnover. Such a system requires a pump to remove the air contained in the steam to he condensed' if the best ee'cts are vto be obtained. The type of pump known es :i lo centrifugal throwing pump has many edvonteges for such yinstallations but there are certain conditions under which it operates et a. disadvantage. I mean by a cent-rifugal throwing puznp one in which Water or 2G seine other medium heavier than air is discharged by an impeller and in so doing acts to compress nir or other gos. vl the pump A is so situated that the throwing Water een freely iiow iroin the 'pu-nip after performing its Work no diiiiculty is experienced. @n the other hand if the pump is located in e deep condenser pit from which the throwing Water cannot freely flow, a specielrotary pump has been used to reinoveseid Water. 3G The use of such e. pump is objectionable on account of initial cost and that ofineintenance end. operation. To obviate the use of the said special rotary pump7 the air pump has been arranged to receive its supply of throwing water from e. receptacle located et a somewhat lower point than the pump into which the pump discharges, the e being used over and over agein. This rangement is defective for the reason that the Water soon becomes heated due to the action of the throwing pump unless the receptacle is unduly7 large. In some 'ceses such lreceptacles cannot be used et all owing to the lack roc-rn. ln any event in a modernte size instellatibn the mere radiation and conduction of heat is insuliicient to keep the temperature es low as it should be. @Wing tothe heating of said Water hy the pump the vacuum is impaired to. the detriment of the 59 economy of the machine discharging into vthe condenser.

l have invented or discovered an errangement whereby tironing nir pumps een be effectively employed either With or Without Y .55 small vessels into which said pumps con disclaims appended thereto.

charge fftheir throwing water, and this with;

out the use of special rot-ary p'uinps serving only as a. means for handling the throwing Water after it has performed its Work on the i one hand or unduly increasing the tempereture of the throwing Water or using large vessels on the other. I, may, for exemple, use on've forni of the invent-ion inthose iustallations where space is et .a premium, and the other form having the vessel Where space 1e less valuable. The use of e vessel'as l arrange it has certain advantages that will appear morefully hereinafter. The funda-- 'mental idee involved in my invention is to provide an abundant supply oit' cool Water vfor the throwing pump7 at the same time overcoming the objections above noted.

For afconsideration o f what I believe to be 'novel and my invention, attention is di rected to the accompanying description and ln the eccompenyingdin rings which are illustra-tive of my invention, Figure l illustrates a condensing system wherein `the circuleting Water conduit system and the throwing pump are connected in parallel as regards the water supply, and Flgf is on arrengem'entsirniler to that shown in Fig. l, except that an equelizing vessel is interposed between the throwing pump and the source of Water supply.

l indicates a surface condenser of any usuel or suitable type to which the steam to he condensed is admitted by the conduit 2. rlhe interior of the condenser is provided With tubes or passages 3 over which the steam to be condensed posses und through which the cooling or condensing Wetercirculates. The circulation of cooling ne through the condenser is maintained hy the circulating pump 4, inlet 5 and outlet (S. The cooling water is supplied to the purnp by the pipe 'T which muy he connected to n cooling tower, reservoir or other sourceoi Water supply. i

' S indicates the centrifugal throwing pump for removing from the condenser'. The pump reeeivesits throwing Waiter from the pipe 9 that is connected to the pipe 7 lend` ing from the supply of circulating waiter. .ln the pipe '9 is a. valve or other device 10 for restricting or' regulating the passage of Water to the suction side of the pumpx.

Thev air to be removed from the condenser\ lovvs by the pipe l1 to the throwing pugp Hoop S wherein it is acted upon by the water dis.- charged by the pump. From the pump the mixture passes. by theconduit 12 into a jet device or constriction 13 in the pipe leading to the 'suction side of the circulating pump. The use of this jet. device. or restriction arranged as shown enables the circulating pum to draw off the throwing Wat-er without t ie use of a special rotary pump. In the pipe 12 is placed a check valve 14 to prevent.

water from the centrifugal circulating pump lor its source of supply from flowing backward to the throwing pump. The circulatingr pump and the throwing pump may be driven by any suitable means such as a turbine or electric motor. I have elected to show each driven by an electric motor 15.

It will be noted that a continuo-us circulation of Water from the pipe 7 is maintained through the throwing pump instead of using the same water over and over again, Which operation would dually heat the water. The amount ot` v:..,er which passes through the throwing pump considerably less than that which passethrough the circulating pump so that only a relatively small amount o t' heat :vided to the water due to its passage through the throwing pump and this amount has but a small eitect upon the main body of the circulating Water flowing through the condenser. 'lhe water used for cooling the condenser' is discharged back to the source ot supply or otherwise, as desired. This niea'ns then that the water available ter use in the "hrowing pump has a temperatur-:i whirl is not greater than that emiiiloyed 'tor circulating purposes; also that thc use ai' an auxiliary vessel or receptacle is avoided, which reduces the necessary space occupied by the apparatus and also avoids the use ot a special pump for conveying the discharged water from the throwing pump' when the latter is so positioued that its discharge cannot flow freely away.

In Fig. 2, a nioditied `arrangement is shown wherein a relatively small vessel is interposed between the source ot cooling Water and the. throwing pump. Circulating water entersl they pump lfrom the pipe 7 as before, a valve 1u being' employed to regulate its passage. .t ceit amount of water from the pipe AT is dis u: 'ged into the collecting or eipializing vessel or reservoir 18 by the pipe 'la under the control of the valve 20. The water in the vessel 18 will be cooled to a greater or less extent due to radiation and conduction. The throwing pump instead of receiving its supply of throwing water directly t'rom. the supply pipe T receives it therel"om-tl1rough the vessel 18 and a pipe 21, Whose lower end is submerged in the vessel and is' provided with a 'strainer The air is conveyed from the'coudenser l'y the pipell and iS discharged with the throwing water by the conduit 23 into the vessel-,18 in which the yair is liberated instead offbeing conveyed with the circulating Water through the tubes of the condenser. The amount of Water that is contained in the vessel is subjected to the control of a float 24 which is connected y by an upright rod withthe lever 25 of a valve 26. This valve regulates the passage of 'Water from the vessel through the Ipipe 27 linto the circulating pump 4. The valve 16 orother; device so regulates the size of'.

duction in pressure beyond the valve 16 due to its throttling action also assists in drawing water through the pipe 27. It lis to be'.

observed in this case as in the one previ. ously described, that the cooling Water con- .duit s stem and the 'mm3 8 are connected in parallel as regards the'passage of Water, hence the advantages set forth in connection with Fig. 1 apply to the arrangement of this figure.` This arrangement also has the advantage that the air which is extracted from the vapor space in the condenser is liberated at an intermediate point instead` of being conveyed with the circulating Water through the pump 4 Where Eit might interfere with its suction.

In accordance With the provisions ofthe patent statutes, I have described the principle of 4Qperat-ion of my invention, together wlth the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that t-he apparatus shown is only illustrative, and that the invention can be carried out by otherl means.

lVhat I claim as new and desire to secure by Letters Patent of the 'United States, is,-

1. In a condensing system, the combinib. tion of a surface condenser having tubes and a steam inlet, a conduit and a pump for circulating a fluid through said tubes for condensing the vapor within the condenser, and

an air pump of the throwing type for removin air from the vapor space of the. condenser, both of said pumps receiving fluid from the same source, and Huid discharged from both pumps passing through the said tubes. v 2. In a condensing system, the combination of a surface condenser havingtubes and a steam inlet, a pump for circulating a condensing fluid through the tubes, a centrifugal throwing pump for removing air from the vapor'space of the condenser, a conduit izs that is common to andH supplies Huid to both pumps, and a conduit that receives fluid from both pumps and discharges it into the 'tubes to condense the vapor vin said concirculating pump, and discharging it into the conduit system on the suction side of said circulating pump. l

4. In a condensing system, the combina tion of a surface condenser, a pump for circulating condensing water through the con denser, a centrifugal throwin 4pump which is piped to the vapor space o the condenser to remove air therefrom, means supplying water to the throwing pump from the source of supply of the circulating pump, and means for conveying Huid discharged from the throwing pump to the suction 'side of the circulating pump, the throwing pump being. connected in parallel with the supply to the circulating pump as regards the passage of water therethrough.

5. In a condenser system, the combination i of a surface. condenser, a pump,l for circulat-` mg condensing Water through it, a centrifugal` throwing pump `which is piped lto the vapor space of the condenser to remove air therefrom7 means for supplying water to the' throwing pump from the source of supply of the circulating p ump, means for conveying fluid discharged from the throwing pump to the suction side of the circulating pump, the throwing pump being connected in parallel with the supply to the circulating pump as regards the passage of water therethrough, and means lfor regulating the passage of fluid through the pumps.

6. In a condensing system, the combina'- tion of a condenser, a centrifugal pump for circulating water through the condenser, a

Acentrifugal throwing air pump for removing air and vapor from the condenser a reservoir, conduit means supplying -water to the circulating pump and .thev reservoir, a conduit between the reservoir andthe water inlet of the throwing pump, a conduit conveying the discharge from the throwing pump to the reservoir, a conduit .for conveying'-vva-`55 ter from the reservoir to the inlet side of the circulating pum and a 4float controlled valve for regulating the flow of water from thereservoir to the last named conduit.

Inwitness-Whereof, I have hereunto set my hand 16th day of June, 1909.v

y l. .HULDREICH KELLER.

' Wtnesse'sz i y Y i HEINRICH BoLTsHAUsEn, U"yCARnGUiiLER.

tupicw of thisgatent s.: @tained for 'tive cents each, by addressing the i'scommissioner ot Patenti,

' Washington, I).I G." i

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