US1489974A - Superheat regulator - Google Patents

Description

Aprifi 8 1924.

SUPERHEAT REGULATOR Original Filed April 10. 1918 2 Sheat-Sheet EENJAM\N Eacmoc' ahmm-m Aprifi 8 192%.

B. BROIDO SUPERHEAT REGULATOR 2 Sheets-Sheet 2 I in Original Filed April 10, 1918 filllskifiiteliknik EEM/A-M/ 13 M INVENTOR.

ATTORNEY.

Patented Apr. 8, i924.

BENJAMIN BROIDO, OF NEW YORK, N. Y., ASSIGNOR TO THE SUPERHEATER COMPANY,

QFICE.

OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

SUPERHEAT REGULATOR.

Original application filed April 10, 1918, SerialITo. 227,808. Divided and this application flied December 23, 1920. Serial No. 432,850. I

1 '0 all whom it may concern:

Be it known that I, BENJAMIN BROIDO, a citizen of the United States, and resident of New York, New York, have invented certain new and useful Improvements in Superheat Regulators, of which the following is a specification.

This application is'a division. of my application for patent filed April 10, 1918,

w Serial Number 227,803.

The invention described and claimed here in has reference to so-ca-lled regulators, the function of which is to reduce the amount of superheat that has been imparted to I steam in the superheater after its generation in the boiler. Since the degree at which the steam is superheated in the superheater will vary from time to time it is necessary to vary the conditions in the regulator if it is ID desired to maintain the final temperature of the steam constant. The object of the present invention is to provide improved means for varying the regulating effect for the purpose stated. I

p The invention is illustrated on the two sheets of drawings herewith, where Figs. -1

, and 2 show two arrangements respectively,

embodying my invention, each of the figures showing the regulator, the portion of the boiler intimately associated with it, and the connections between the two; and Fig. 3 shows on an enlarged scale a valve and its controlling element used in my invention.

Referring first to the form illustrated in Figure 1, the boiler is represented at 1 which may be either the main barrel itself of a boiler or may be the steam and water drum 'of a water tube boiler. In any event it must include a steam space 2 and a water space .3, but may otherwise be of any form or type whatever.

The steam space 2 and water space 3 are connected to the regulator by means of pipes 4 and 5 respectively. The regulator, itself,

is of a type shown in the prior art and ma briefly be described as follows. A drum is closed at its two ends by tube sheets 7 and 8. Between these tube sheets extend the tubes 9, which do not open into the space wlthin the drum 6 but do open into the two headers 10 and 11.

The pipe 5 opens into the inside of the drum 6 at a low point, and the pipe 4 at a high point.

Superheated steam is admitted to the header 11 of the regulator through a pipe 13 and is conducted away from header 1() by a pipe 12. This superheated steam may come from the boiler-to which pipes 4 and 5 are connected or from some other source. In any case before being delivered to header 11 by pipe 13 it has been superheated.

In plpe 4 there is the hand-valve 14 and in pipe 5 a hand-valve 15, both of them of any usual or preferred kind. In pipe 4 there is in addition a thermostatically controlled valve 16. This valve 16 is of a commercially well-known type and acts in response to variations in temperature, the operative impulse being transmitted to it by pipe 17 from the thermal element 18, which element is located in the pipe 12. The thermostatic valve is arranged to close at a certain predetermined temperature of the element 18, and to be wide open at a second higher predetermined temperature assuming intermediate positions between these two temperatures. of course have a definite relation to the ultimate desired temperature ofthe steam as will be clearer from the following description of the operation.

The valve 16 and its co-operating thermostatic element 18 are illustrated on an enlarged sea-1e in Fig. 3. The spring 51 tends to keep'the balanced valve 50 in housing 37 closed, this tendency being opposed by pressure exerted by the fluid in chamber 52 actuating the valve through rod 53. The pressure in chamber 52 varies with the amount of fluid forced into the chamber, or allowed to. leave the chamber, through pipe The two temperatures will- 39, the other end of which communicates with chamber 54. Fluid is forced from the chamber 54 or allowed to enter it through pipe 39 in response to a rise or a drop respectively of the temperature of element 18.

The valve and its control are of a known commercial type and it is not thought necessary to enter further into any detailed description of its construction, as its form is not a part of my invention, ts action is such that when the temperature of the steam in pipe. 12 falls below a certain recise Cdueing effect possible with the regulator point, the valve is closed; when said temperature rises above acertain higher point, the valve iswide open; while at intermediam-temperatures the valve assumes correspending intermediate positions. Any thermostatically controlled valve answering these requirements and otherwise suitable may be substituted for the one shown and described.

, will evaporate some of the water within the drum 6 and its temperature will thereby be reduced. The maximum temperature rewill evidently be obtained when drum 6 is entirely filled with water as just described.

Should this reduction bring the temperature of the steam below the constant temperature desired, the thermostatic valve 16 will close.

Steam generated by the evaporation of the water in drum 6 can then no longer escape to thesteam space 2 of the boiler by way of pipe 4 and will accumulate in the upper portion of drum 6. This will result in a lowering of the water level within the drum 6 and a consequent lessening of the effect of the regulator. Should all of the water, be forced out no further-regulating effect will occur. It with the water level in drum 6 de ressed to any point as described, the res ting temperature \of the superheated steam is too igh, the thermostatic valve 16 will-open, permitting steam formed in the drum 6 to escape to the boiler, and more water to reach the regulator through pipe 5. This will result in a greater reduction-in the temperature of the superheated steam. ,The valve 16 will evidently finally assume a certain intermediate position and retain it as long as the temperature of the superheated steam delivered to the regulator remains constant.

It should ,be noted that the heat given up by the superheated steam in its passage through the regulator is not lost, but delivered back to the boiler by the steam delivered through. pipe 4.

In the arrangement illustrated in Figure 2, the regulator is by way of variation placed in a horizontal instead of a vertical position, but is of the same construction as that of Figure 1. Pipes 4 and 5 here also connect the steam space and the water space of the boiler with high and low points of the regulator drum respectively, and are also pro ided with. valves 14 and 15. The thermostatic valve 16 is in this variation not in pipe 4 but in the water supplying pipe 5.

Its thermostatic element 18 is also in the pipe 12, delivering the superheated steam after its passage through the regulator.

The operation of this form is as follows.

With the valve 16 wide open the entire water space within the drum 6 of the regulator is filled with Water which reaches a level in pipe 4 equal to that of the water in the boiler. Under these conditions the maximum tempering or regulating effect is obtained. Should the regulating effect he too great the valve 16 will close to such a point that the rate at which the water is evaporated in drum 6 exceeds that at which fresh water is su plied from the boiler through pipe 5 and va ve 16. The water level will therefore fall in drum 6 until the regulating effect is sufficiently reduced. In normal operation the position of valve 6 will again assume some position intermediate between the wide open and the entirely closed one, which it will retain as long as the superheated steam delivered to the regulator remains the same.

It will be evident that some variations might be introduced into the arrangement without departing from the spirit of my invention. For example, the steam may flow in a direction opposite to that spoken of above, so that it enters by pipe 12' and leaves by pipe 13, the thermostat in other words being located in the steam before it is tempered. The regulation then will be based on the temperature of the steam as it arrives at the regulator. This and similar variations are meant to be covered by the appended claims.

What I claim is:

1. In apparatus of the class described, the combination of a boiler, a regulator of the type in which. the temperature of the superheatedsteam flowing through it is lowered by water not in direct contact with it by an amount depending on the amount of water in the regulator, a conduit supplying super heated steam to the regulator, a second conduit conveying it away, a pipe connecting a low point of the water space of the regulator with the water space of the boiler, a pipe connecting an elevated point of the regulator water space with the steam s ace of the boiler, a valve in the last-name pipe operative responsively to the temperature of the superheated steam to assume a closed position when the temperature falls below a predeter mined point,'an open position when it rises above a predetermined higher point, and intermediate positions for intermediate temperatures.

2. In apparatus of the class described, the combination of a boiler, a regulator of the type in which the temperature of the superheated s'team flowing through it is lowered by water not in direct contact with it by an. amount de ending on the amount of water in the regu a-tor, a conduit sup lying superheated steam to the regulator, a second conheated steam to assume a closed position duit conveying it away, a pipe connecting a when the temperature falls below a predeter- 10 low point of the Water space of the regulator mined point, an open position When it rises with the Water space of the boiler, a pipe above a predetermined higher point, and in- 5 connecting an elevated point of the regulator tel-mediate positions for intermediate telnwater space with the steam space of the boilperatures. er, a valve in one of the tWo pipes operative responsively to the temperature of the super- BENJAMIN BROIDO.

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