US1741043A

US1741043A - Heat-exchange apparatus

Info

Publication number: US1741043A
Application number: US46304A
Authority: US
Inventors: George W Watts
Original assignee: Standard Oil Co
Current assignee: Standard Oil Co
Priority date: 1925-07-27
Filing date: 1925-07-27
Publication date: 1929-12-24
Anticipated expiration: 1946-12-24

Description

Dec. 24, 1929. GQ w. WATTS HEAT EXCHANGE APPARATUS Filed July 27, 1925 Wiz/@772.9% @of e Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE GEORGE W. WATTS, OF WHITING, INDIANA, ASSIGNOR TO STANDARD OI: COMPANY OF WHITING, INDIANA, A CORPORATION OF INDIANA HEAT-EXCHANGE APPARATUS Application led J'uly 27, 1925.

The present invention relates to .improvements in heat exchange apparatus and more particularly to methods and apparatus for preventing such devices from becoming gas bound. In heat exchange devicesfor use inl y tamination of the rened constituents with the unrelined fresh stock, This will be fully understood from the following description, in which apparatus for carrying the invention into effect, is shown somewhat diagram-- matically and in section.

Referring more particularly to the drawings, the numeral 5 designates the upper portion of a fractionating column or other like device, which is surmounted by a heat exchange device 6, serving in the present 'instance as a reiiux'condenser. In the form illustrated, this device is prdednternally with the spaced tube which extend the tubes 9 servingfor the pas-V sage of vapors through the device.

A suitable cooling medium is introduced in controlled quantities through the pipe 10 into the space between the tube plates 7 and 8 and surrounding the tubes 9. The cooling medium makes its exit through the pipe 11.

For the proper operation of a heat exchange device of the type herein set forth, it is necessary that the space between the tube plates and surrounding the tubes 9 be completely surrounded byv the cooling medium, which is ordinarily a liquid such as water, oil, a condensible gas or the like, but may be gas (i. e. with air in it). In the operation of such devices, it frequently occurs that, in the flow of the cooling medium through the inlet pipe to the exit pipe therefor, a certain portion of the space between the tube plates 7 and 8 be- 'comes charged with -gases or vapors forced Serial No` 46,304.

out of the cooling medium by the heat applied thereto or with incondensible gas, such as air, when the cooling medium is a condensible gas, and these gases or vapors collect in a remote part of the space, preventing access of the cooling medium thereto. In the form illustrated in the drawing, this gas bound space is shown and is designated by the numeral 12.

In accordance with this invention, the cooling medium passing out of the heat exchange device through the exit pipe 11 passes throughthe throat of a Venturi tube 13 and thence into the discharge line 14. The Venturi tube 13 is surrounded by a suitable casing. 15 and openings 16 are provided from this casing to the interior of the throat of the Venturi tube. A valved `tube 17 connects that portion of the space in the heat exchange device occupied by the cooling medium in which gas tends to collect with the interior of the chamber 15. The passage of the cooling medium -A discharged through the exit pipe 11 through the throat of the venturi causes suctionto be exerted through the chamber l5 and the connection 17 with the gas bound portion of the heat exchange device, and-thereby withdraws the collected gas and permits the entire space between the tube plates and surrounding the tubes to be occupied by the coolplates 7 and 8, betWeerrn-fr medium and it likewise improves the circulat1on\ofthe\cooling medium through the device. The tub`e`l7 `is valved so that, after removal of the gas or vapor causing-gas binding, the iow of the cooling medium therethrough may be prevented.

Although the present invention has been described in connection with the specific details of apparatus suitable for carrying it into effect, it is not intended that these details shall be regarded as limitations upon the scope of the invention, excepting so far as included in the accompanying claims.

I claim:

1. In a heat exchange device having a space occupied by a heat transfer medium, means for supplying a heat transfer medium to said space, exit means through which said heat transfer medium is caused to flow after leaving said space, means for causing the exit iiow of the heat transfer medium to produce a pressure depression, and means for utilizing said pressure depression to remove collected gas from the space occupied by the heat transfer medium. A

2. In a heat exchange device having a space v occupied by a heat transfer medium, means for causing the heat transfer medium to flow into said space, an exit pipe for the discharge of the heat transfer medium from said space, o a Venturi tube through which the discharged heat transfer medium' asses, and means for connecting a portion o said space in the heat transfer device in which gas tends to 'collect with the throat of said'venturi, thereby With- 15' drawing gas from said portion of the space.

GEORGE W. WATTS.