Year: 1885

page_text: I, GEORGE WALKER, of N° 95 Leadenhall Street in the City of London, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus for heating by means of steam the feed water
on its way to the pump which feeds the boiler. For this purpose, I provide a
vessel divided into two compartments by a partition, through which there is a
passage formed somewhat like that of an injector. Centrally within this passage
is a nozzle at the end of a steam pipe, which nozzle is perforated by a number of
holes directed obliquely forwards. The feed water is admitted into the first
compartment while steam is sent by the pipe through the nozzle. The steam
issuing through the perforations has an injector action causing the water to flow
through the annular passage around the nozzle, in which passage it mixes with
and becomes heated by the steam. From the second compartment the heated
water passes to the feed pump. In the first compartment I prefer to fix a deflector
which impeding the direct rush of water to the injector passage, distributes it all
round the nozzle. In the second compartment I provide, below the level of the
outlet, space to receive the solid matter that subsides from the heated feed water,
with a suitable mud hole for its removal
ABEL & IMRAY,
Agents for the Applicant.

page_text: I, GEORGE WALKER of N° 95 Leadenhall Street in the City of London,
Engineer do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement:-
My invention relates to apparatus for heating by means of steam the feed water
on its way to the pump which feeds the boiler. For this purpose I construct
apparatus as shewn in section by the accompanying drawing. I provide a vessel
divided into two compartments A and B by a partition C through which there is
a passage formed somewhat like that of an injector. Centrally within the passage
is a nozzle D at the end of a steam pipe E, which nozzle D is perforated by a
number of holes directed obliquely forwards. The feed water is admitted by a
passage F into the first compartment A while steam is sent by the pipe E through
the nozzle D. The steam issuing through the perforations of D has an injector
action causing the water to flow through the annular passage around the nozzle, in
which passage it mixes with and becomes heated by the steam. From the second
compartment B the heated water passes by an outlet G or H to the feed pump.
In the first compartment A. I prefer to fix a deflector K which impeding the direct
rush of water to the injector passage, distributes it all round the nozzle D. In the
second compartment I provide below the level of the outlet, space L to receive the
solid matter that subsides from the heated feed water, and a suitable mud hole M
may be provided for its removal. The steam pipe E passes through a stuffing box N
and has on it a screw thread on which works a hand nut P, by which the position
of the nozzle D can be adjusted. In cases where the upper compartment A is of
considerable depth, it is of advantage to extend down from the nozzle D a stem
(indicated by the dotted lines d) which, passing into or through a hole in a boss
or in a cross rib in the passage to H, serves as a guide to prevent the nozzle D
from being displaced from its central position. There may be several nozzles D as
shewn in section by Fig. 2 and in plan by Fig. 3.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
A feed water heater constructed and arranged substantially as herein described
with reference to the accompanying drawings.