Improvements in Preventing Sediment or Mud Forming Incrustation in the Lower Part of Pendent Tubes of Steam or Hot Water Boilers.
Year: 1897

page_text: Improvements in Preventing Sediment or Mud Forming Incrustation
in the Lower Part of Pendent Tubes of Steam or Hot Water
Boilers.
CHARLES PHILIP HORTON, Foundry Road, Winson Green, Birmingham, Boiler
and Cut Nail Manufacturer, do hereby declare the nature of this invention to be
as follows:.
I will describe my invention as I apply it to a cylindrical boiler. I construct a
cylindrical boiler which I place vertically or nearly so upon the top of walls of
brick-work which form a chamber for receiving the flames and heated gases of
the fire. The bottom of the boiler is the tube-plate to which I connect pendent
tubes having a lesser tube inside them to create circulation of, the water similar
to that produced in the well known "Field tube." The bottom end of each or of
any convenient number of the said pendent tubes I connect to the top side of a
sediment chest into which the water passes after its downward circulation in the
said lesser tube and out of which sediment chest the water circulates upwards into
(and in) the annular space between the inside and outside tubes.
I use any number of sediment chests that may be required according to the
size of the boiler and have one or more mud holes & blow off cocks in them for
the removal of sediment.
I place the fire grate (or greatest part of it) outside the hereinbefore mentioned
brickwork chamber and a little higher than the top side of the sediment chests,
and may form the top, and one or more of the sides of the fire box by means of a
water chest the top of which is connected to the bottom of the boiler..
Toted this 12th day of October 1897
Improvements in Preventing Sediment or Mud Forming Incrustation
in the Lower Part of Pendent Tubes of Steam or Hot Water
Boilers.
I, CHARLES PHILIP HORTON, of Foundry Road, Winson Green, Birmingham,
in the County of Warwick, Boiler Maker and Cut Nail Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be
CD 017

page_text: performed, to be particularly described and ascertained in and by the following
statement:
This invention consists of the herein described improvements in preventing
sediment or mud forming incrustation in the lower parts of pendent tubes of
steam or hot water boilers of that kind in which each of the pendent tubes has
a lesser tube inside it to create circulation of the water similar to that produced
in the well known "Field tube."
I will describe my invention as applied to a cylindrical boiler and I will refer
to the accompanying drawings on which Fig. 1 is a sectional elevation on line X X
of Fig. 2 of a vertical cylindrical steam boiler with my invention applied to the
pendent tubes of the same; Fig. 2 is a sectional plan of the said boiler on line Y Y
of Fig. 1; Fig. 3 is a front elevation. Fig. 3* is a side elevation. Fig. 4 is a
sectional elevation and Fig. 5 is a plan of one of the side rows of pendent tubes
of the said boiler with my invention applied thereto.
The same letters of reference indicate the same parts in all the figures.
In carrying out my invention I employ a cylindrical boiler A (or a boiler of
any other convenient shape) which is placed vertically or nearly so over the top
of brick walls B which form a chamber C underneath the bottom of the boiler for
receiving the flames and heated gases from the firegrate D. The bottom a¹ of
the boiler is the tube plate and to this are connected the pendent tubes E each of
which has a tube F of smaller diameter inside it to create circulation of the water
down the smaller tube and up the annular space between the inner and outer
tubes as in the well known "Field tube.
22
The bottom ends of the tubes E are not closed and hemispherical as in the
"Field" tube but these pendent tubes E are open and any convenient number
of them (preferably all those which form one row) are connected to the top side
of the sediment chest. In the boiler illustrated by my drawings eight of these
sediment chests are used arranged side by side and are marked respec-
tively G¹ G G³ G* G³ Gº G² G8. After the water has circulated down the inner
tubes F it passes into the sediment chests and there deposits any mud or sediment,
the water circulating upwardly from the sediment chests along the annular spaces
between the inside tubes F and the outside tubes E.
L, L, L are plugs which fill up the holes in the bottoms of the sediment chests
through which the tube expanders have been inserted to expand the ends of the
tubes E and fix them in the sediment chests.
I use one or any other number of the said sediment chests as may be required
according to the size of the boiler. Each sediment chest has a blow off cock H
at one end preferably at the front of the boiler for the removal of the sediment. In
the arrangement shewn on my drawing the pipes leading from the blow off cocks H
connect to a common blow off pipe K which has a blow off cock J so that after
the latter is closed any leakage from the cocks H will not be noticed.
If desired one blow off cock may be made to serve for two or more of the sedi-
ment chests instead of each sediment chest having a separate blow off cock as
shewn on my drawing.
I prefer to place the fire-grate D outside the brickwork chamber C, and the top 4
of the bridge d¹ is a little higher than the top side of the sediment chests so as to
prevent the flames playing upon and overheating the sediment chests. There is
a partition I extending up to within a certain distance below the underside of the
bottom a¹ of the boiler so as to baffle the draught and cause the heat to pass up
from the fire-gate along and around the tubes E at one side of the partition I
and then over the partition I and down and around the tubes on the other side
and away through the outlet 6 as indicated by the arrows in Fig. 1.
It will be understood that the top a³ and bottom a¹ of the boiler A are suitably
stayed by stays M which are shewn in section in Fig. 2 but in order to render
Fig. 1 more clear the stays M are, with the exception of one of them, omitted 5
from Fig. 1.

page_text: My invention is applied to the pendent tubes of hot water boilers similarly as
above described and shewn as applied to the pendent tubes of a steam boiler.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. In a boiler provided with pendent tubes of the kind herein referred to, the
employment of a sediment chest or sediment chests arranged out of the direct
action of the fire and connected to the bottoms of several of the said pendent
tubes so as to receive the sediment therefrom and provided with one or more blow
off cocks for removing the sediment from said sediment chest or sediment chests
all substantially as hereinbefore described.
2. The improved vertical pendent tube boiler provided with pendent tubes
hanging from the base of the same the bottoms of said tubes being connected to
sediment chests arranged out of the direct action of the fire and provided with one
or more blow off cocks for removing the sediment therefrom all substantially as
herein before described and illustrated by the accompanying drawings.
Dated 41.
1141 1
TL
1000
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.