US2119652A - Feed water heater - Google Patents

Description

June 7, 1938. J M 5H|MER 2,119,652

FEED WATER HEATER Filed July 11, 1935 3 Sheets-Sheet l INVENTOR.

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ATTORNEYS June 7, 1938. J. M. SHIMER 2,119,652

FEED WATER HEATER Filed July 11, 1935 5 Sheets-Sheet 2 INVENTOR.

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ATTORNEYS June 7 1938. J. M. SHIMER FEED WATER HEATER Filed July 11, 1935 3 Sheets-Sheet 3 I Illlllll INVENTOR. c/H/v 2%.fiH/MEE. m 9% ATTORNEYS Patented June 7, 1938 PATENT. .OFVFICE' 7 2,119,652 FEED WATER, HEATER John M. Shimer, Dallas, Tex., assignor to Oil Well Supply Company, Dallas, Tex., a corporation of New Jersey Application July 11, 1935, Serial No. 30,909

1 Claim.

My present invention relates to apparatus for heating feed water for boilers by means of exhaust steam, and is an improvement on my Patent No. 1,964,710 of June 26, 1934.

In the feed water heater of the above patent, cold water was supplied by a pump to a heating chamber into which the exhaust steam was ad mitted for contact with the water, and the amount of water admitted to this heating chamber was controlled by a float valve. When the level of the Water in the heating chamber rose to a predetermined limit, the admission of cold water was closed and the pump was stopped by the stopping of the flow of water therefrom. Although the pump was stopped, a full head of steam was applied at all times to the pump. This resulted in considerable waste of steam, and in other disadvantages.

These disadvantages are obviated by my present invention in which when the level of water in the heating chamber rises to a predetermined limit it acts to shut off the supply of power to the cold water feed pump, thus avoiding Waste of power and also avoiding maintenance of pressure on the line to the heating chamber.

The various features of the invention are illustrated, by way of example, in the accompanying drawings, in which- Fig. 1 is a side view of a heating chamber and of a pump and power driving means therefor embodying a preferred form of the invention.

Fig. 2 is an end view of the pump taken from the left of Fig. 1.

Fig. 3 is a vertical sectional view on line 3-3 of Fig. 1 through the heating chamber.

Fig. 4 is a plan view of the heating chamber and steam supply to the pump driving engine or power, and

Fig. 5 is a vertical view of the heating chamber taken on line 55 of Fig. 1.

In my invention steam is admitted to the heating chamber and water is sprayed through the steam until it accumulates to a predetermined" level. Water is supplied to the heating chamber by a pump driven by suitable power means as, for example, a reciprocating steam engine. water accumulates to a predetermined level in the heating chamber it lifts a float which, in turn, interrupts the supply of power or steam to the pump driving engine. Thereupon the pump stops and no further water is supplied to the heating chamber until sufficient water is removed to low er the level, whereupon the pump again supplies water to the chamber until the float is again lifted to its predetermined level.

When

In the specific embodiment illustrated in the accompanying drawings steam, which may be exhaust steam, is supplied from a supply pipe H] to a heating chamber I I. It is directed by means of a deflector l2 and a baflle l3 across the upper 5 end of the heating chamber so as .to be brought into contact with water sprayed downwardly from an inlet valve l4. Any water that may be formed in the inlet pipe 10 by condensation of steam may pass through an opening 15 in the 10 deflector l2 downwardly over the baffle l3.

Water is supplied to the inlet valve M from any suitable source by means of a pump 16 driven by a suitable power such as the reciprocating steam engine 11. Water is drawn into the pump 15 through an inlet pipe 18 and is forced from opposite ends of the pump into a pipe l9 and thence through a passage 20 extending upwardly and over the top of the chamber II. From the passage 20 water passes in an expanding annular 20 stream or spray through the valve I4, which is an inwardly opening spring operated check valve.

The water thus sprayed into the heating chamber ll comes into direct contact with the steam admitted through the pipe 10 and is thereby heated.

The heated water collects in a pool or mass 2| in the lower part of the heating chamber H from whence it is withdrawn through an outlet pipe 22 v to a force pump 23 which supplies the heated water to a boiler. Steam is supplied for driving the engine I1 from a supply pipe 24 through a shut off valve 25 in a branch pipe 26 which also contains a control valve 21. From the control valve 21 the steam passes through a pipe 28 and shut ofi valve 29 to the steam cylinder of the engine l1.

Exhaust steam from the engine 11 as well as that from an engine 3|] for driving the feed water pump 23 returns through an exhaust pipe 31 to the steam supply pipe ID.

The control valve 21 is actuated or controlled by the level of water in the heating chamber ll through a float 32. The float 32 rises and falls with changes in the level of heated water in the chamber II. This motion is transmitted by a crank arm 33 secured to the float to a rock shaft 34 which extends through a stuffing box 35 in the wall of the chamber. The movements of the rock shaft 34 are transmitted through a lever 36 outside of the chamber II, and a link 31 to a lever 50 38 pivoted by a link 39 to the lower end of the valve 21. Movement is transmitted from the lever 38 through a valve stem 40 to a valve piston 4| in the valve 21. As the float 32 rises, it lifts the levers 36 and 38 and forces the valve piston '4l upwardly to restrict or interrupt the flow of valve 21 to be'by-pass'ed and steam to be admitted float 32 falls, lowering the levers 36 and 38 and' the valve piston 4| and opens the valve for increased flow of steam to the engine [1. A by-pass pipe 42 and a control valve 43 enable the control directly from' the supply pipe aflto the 'enginel].

30 are mounted on a common'pair of' skids 44 in a compact unitary structure, but it will be tin 1 derstood' that any other suitable mounting may 7 be employed andthat other pump constructions than that specifically illustrated may be-:em-

' ployed It will beunderst'ood' that the engine I717 is a small diameter engine as but little power is'required to pump the water into the heating chamher I I'. By controlling the supply of power to the pump I 1 instead of ,controllingthe how therefrom.un derjfull power, waste of power is avoided a 'and ,aIs the loading of the pump 16 and the, piping from this pump to the heatingchamber with anflexcess of power ibyl-stopping the supply of water is avoided: and the operation of-the a'ppara- Vtus'thereby improved.

'I'hepumps [Band 2 3 and the-engines f! and a V ing cylinder, manually actuated means for con-" i trolling the admission of steam to the steam'cyl- What I claim is V Apparatus for supplying heated water which comprises a feedwater heater having a steam admission pipe, a steam actuatedeold water pump 7 for pumping cold water into the heater, means to divide said cold water as it enters said heater into intimate contact with steam admitted therea into to heat said water, a steamactuated hot wa- V a ter pump fofpumpihg 'hot water'f r om the heater, 'each= pump having a steam'cyllnder. and a pumpinder-oflthe hot water pump,;means separate and individual of said manual means'for controlling the steam sup l ijto the steam cylinder of the J --cold water pump, said meanslcomprising a steam supply'valve subject continuously to full pressure steam, a floatin said feedwater heater to open said valve when the water level therein falls below a predetermined level and to close it when .the water level rises abovea predetermined level, fanda manually actuated throttle connected in parallel to said float operated valve for independent and conjunctive control of the-admission of steamitothe steam end of saidcold cylinder. 7 1 V a 7 JOHN M. 'SHIMER.

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