US1915460A - Steam generator - Google Patents

Description

June 27, 1933. A. L. WILSON STEAM GENERATOR Filed Feb. 25, 1930 OHOOHU AKGHO ATTORNEY patented June 27, 1933 UNTTE STATES Parana castes AMYUIT L. WHISON, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO STANDARD OIL DEVELOPMENT COMPANY, A CORPORATION OF DELAWARE STEAM GEN ERATOB Application filed February 25, 1930. Serial No, 431,234.

This invention relates to improvements in steam generating systems and comprises the use of a washing device for purifying the steam, together with other features, all of which will be fully understood from the following description, read in connection with the accompanying drawing, in which the figure is a diagrammatic vertical section through the device.

In the drawing, reference numeral 1 designates the fire chamber of a furnace which is heatedby flame from a burner'2. The products of combustion pass from the fire chamber through chambers 3 and 4 to a stack 5. Fresh feed water passes through line 6 and heat exchanger 7 to preheater 8 located in chamber 1. The preheated water is conducted through line 9 and valve 10 into a header 11 from which it passes through a coil 12 in fire chamber 1. The water is-maintained under pressure in the heating coil by means of the pressure control valve 15, which communicates with the coil through a header 16. The water may be maintained in the heating coils under a relatively high pressure such as, for example, 3200 lbs. per square inch.

The water passes through valve 15 into a line 17 at reduced pressure. Line 17 discharges through header 18 into a container 19 for wash water and below the normal level of the water. The container 19 may be referred to as a steam washer. The wash water removes the salts and other solid material in the steam formed from the water. Steam escapes from the container through a line 20 c and passes through a superheater 21 disposed in chamber 3 and is discharged through line 22 to a power developing machine, such as a turbine, or to refinery processes. The wash water containing the concentrated salts is conducted from the container 19 through a blow down line 23 and heat exchanger 7 to a suitable place of disposal not shown. A valved exhaust 21 communicates with the container for use when required.

Fresh feed water may be introduced through line 26 into the container 19. and the withdrawal of the water from the container is effected through valve 27, line 28,

pump 29 and valve 30, to the header 11, through which it is injected into the heating coil 12. A valved line 31 communicates with line 26 and with line 9 through a valve 32. A valved line 33 connects line 31 wit-h steam line 17. A. make-up water line 26 connects line 26 with washer 19. Flow through lines 26 and 31 is controlled by valves 26" and 31 respectively.

In the operation of the equipment shown in the figure, valve 10 may be opened and valve 32 closed, feed water passing through line 6, heat exchanger 7, preheater 8, line 9, coil 12, and line 17 into steam washer 19. Pressure is reduced at valve 15 from any desired pressure up to 3200 pounds square inch I in coil 12 to any desired pressure in washer 19. The steam passes from the washer to superheater 21 and thence via line 22 to a turbine or other suitable utilization, for example, according to the method described in my United States patent application Serial No. 431,233 filed of even date herewith.

Make-up water is supplied as required through line 26 to maintain the water level in washer 19. In this operation valves 26" and 27 are opened and Valve 31' is closed.

Alternatively, valves 10 and 31' may be opened and valves 26", 27 and 32 closed. The main feed Water supply is through line 6. Make-up water is supplied separately through line 26, line 31 and the make-up water is supplied as required through branch line 33. Circulation is maintained by pump 29 takmg suction from washer 19 and discharging through header 11 into coil 12, thence into line 17 and back to the washer. Salts accumulating in the latter are Withdrawn through line 23.

Various changes may be made within the scope of the appended claims in which it is desired to claim all novelty inherent in the invention as broadly as the prior art permits.

I claim:

1. A boiler system comprising a coil, means for supplying water thereto, means for converting the water in the coil into steam under high pressure, means for receiving under reduced pressure the steam discharged from the coil and containing a bodyof water, the

steam entering beneath the surface of the water, means for supplying fresh water to said body, means for taking ofi water therefrom, means for taking off steam therefrom,

6 means for superheating said steam, and means disc water from the zone, taking ofl'f steam for efiecting heat exchange between the water passing to the coil and a portion of the water removed from the body of water receiving the discharge from the coil.

- 2. A'boiler system com rising a steam generating coil, a steam was er connected thereto, means for supplying water to the coil, separate means for supp ying make-up water to the washer, means for withdrawing water therefrom and means for withdrawing steam therefrom.

3; A boiler system com rising a steam generating coil a steam was er connected thereto, means for supplying water to the coil,

separate means for supplying make-up water to the washer, means for withdrawing water therefrom, means for withdrawing steam therefrom, and means for passing the makeup water in part directly into the steam generating zone of the boiler.

4. Method of generating steam comprising pming water through a heated zone in which it is maintained at high pressure, reducing the pressure on the stream leaving said zone,

arging the stream at reduced pressure into a steam washing zone beneath the surface of a body of water therein, takin off cm the zone, superheating the steam, introducing feed water for the system into the heating zone and adding aseparat/e supgly of make-up water to the body of water in t e steam washing zone.

AMYUIT L. WILSON.

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