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THE EXPRESS LIFT CO., LTD.
WITH WHICH IS INCORDONATED THE BUSINCES OF
SMITH, MAJOR & STEVENS, LTD./
EXPRESS SMS
LIFTS
MODERN LIFTS
FAR
MODERN BUILDINGS
SPEEDY RELIABLE SERVICE
FOR DETAILS APPLY TO
THE G.E.C., QUEEN'S BUILDING, CHATER ROAD.
· · EVERYTHING
The
G.E.C.) ELECTRICAL
your guatantes
EBONITE
Carwiths
BITUMASTIC PAINT
a.
Berger Product
MOST ECONOMICAL
PRESERVATIVE OF METAL AND WOOD AGAINST SEA, ACID ALKALI, HEAT, COLD
STOCKS CARRIED
W. R. LOXLEY & CO.
4. Atkinson
Kadesive LicenKOĆI
Wrabers of the C,M,&.
In
HONG KONG DAILY PRESS, SATURDAY, JANUARY 9, 1932.
ENGINEERING AND BUILDING
TREATMENT OF RAW WATER.
A MODERN PLANT,
recently constructed plant
for dealing with raw river water, the intake delivera into a shallow 1.well, for rough settling, and from thence into the settling tanks in which provision is made for the eccesary sludge removal.. From these the water passes to carbona. tion chambers whence, after treat munt, it enters the main building, being fed into two collecting sumps, From thess it is conducted to the Alters or returned to the second mixing tank. Filters filled with 24in. of gravel from 2in.
-12in, in size and 30in. of sand having an effective size of .400 m.m. and J
are
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uniformity coefficient of wrought iron and are not provided with strainera. Loss of head gauges, controllers and a wash water line manometer are appurtenances of the filters.
A clear well is situated below the filters, into which the filtered ofluent flows through a common manifold cutlet of the controllers Chlorine is applied from a dry feed chlorinator into this manifold, but it may be applied at other points in the treatment.
Activated Carbon."
As the activated carbon treatment was designed to be used for not over three months of the year it was decided to make a pressure unit or adsorber. At full plant capacity the adsorber would be operating at a 10 gal, per square foot per minute rate, but it is only intended to operate the plant at half its cape ity for several fears.
The piping and valves are Y- ranged so that the adsorber which normally operates on" upward low can be washed in the reverse direc- tion, and also, so that it can be cut out of the discharge line, par. tially or entirely.
The treatment being given with the present fa clear raw water) is as follows: Treat the water with
OIL BURNERS IN INDUSTRY,
DEVELOPMENTS AND ADVANTAGES IN USE.
South
capable of dealing with heaty oils, provided that suitable pro-henting arrangements are installed:
"Modium-sized Buildings,
In medium-sized buildings, usuar ly a battery of three or sometimes more boilers are installed of a rat- Rapid developments have beening of anything between 200,000, and and are being made in connection 1,000,000 British thermal units, and the boilers pro attended to by the with the use of fuel oil burners in transport, industry and the heating
liftman or caritaker, Hore it may be argued that a change-over from of both large and small buildings. It will be remembered that some coal to oil would not be of advant forty years ago Mr. Andrew Reid ge. But on the other hand the cheapness of the fuel and the fact first improved on the crude way in
that an Automatic oil plant re- which oil fuel, then almost an un- saleable product, was squirted into quires absolutely no attention, ani the fre-boxen of certain
can be controlled by a clock switch. which American · locomotives,
puts it out of action at any
He found that the methods then to get the temperature just right definite time and restarted so as in vogue produced local overheat by the time the staff starts work, ing and did damage to the boilers appeal at once to the owners of plates in consequence, and felt that factories or big blocks of cfiers. the correct policy would be to dia- With two or more boilers, unles pense with oi jets as then used certain precautions are taken, t and to substitute for them a flow may be found, that the functioning ing film of oil atomised by low-of one boiler may have "an ellest. pressure ateam. Owing to other on the working of another That duties, he was unable to develop is in chees where both boilers are his ideas, but his son, Mr. Ernest connected to common fluc, and Andrew. Reid, brought them to the remedy is to have a damper England, where, after a series of fitted so that any boiler may be experiments; a. company, now of the largest manufacturers of those appliances, was formed to make and market the burners,
ong
reason it is as well to have expert Went out" from the flue. For that
advice from the manufacturers of the plant when it is being installed,
Economies.
The late Mr. James Holden, one- time chief engineer of the Great Eastern Railway, introduced oil Solely from the point of view ol burners of his own design into the heat units generated, oil can ecm- locpinctives of that company with pete with coal at half its price par considerable success, and the suitton, but this is only one of the ability of oil fuel for traction work economies involved. The automaire! was quickly demonstrated.
oil firing plant offers very "definite economies in labour, time, trouble, and est, and when due allowance is made for these the total economy is far greater than the mere money figures would seem to indicate.
It is a far cry from the seme what crude, steam-operated burn- ers of yesterday to the up-to-date automatic burner with its ther mostatie control and electric ign tion, but so far as one of the Wideet, established firms of manu- facturers in Europe is concomed, to follow the demands on the cen- the driginal fiming burner of Etral heating and hot water systems. A. Reid is the basic patent on small as to be negligible. There is
that temperature changes are which all but one of their numer.
ous types of burner, for so great
With oil firing the rate of com. bustion can be arranged so closely
801
an entire absence of smoke, smell,
a variety of purposes is based. Itor dirt of any description, and the boiler room, which with solid fuel
time to about 25 parts causticity may be mentioned that Mr. Reid' tends to be a dirty stake-hole, ba- |
iden was developed and first made
commercial success, by Engr. "Comdr. Andrew Marsden, R.N., a petroleum technologist who tas since designed filming burners for Practically every form of heat treatment in industry.
The Axial Fan.
through Number 1 settling basin, carbonate in Number 1 carbonation chamber reducing the causticity to 0 parts, add alum in Number
mixing tank sufficient to get a fine flow in Number 2 settling basin, carbonate in Number 2 carbonation chamber to neutrality and filter. In flood time it is intended to ap ply a heavier dosage of aldia 12 In a typical appliance of the Number 1 mixing tank and apply type, the burner is fitted with an The lime in Number 2 mixing tank, axial fag discharging through a heessary the sludge return taperice orifice. The, extreng did- Number, 2 mixing tank can also gig of propciling air by an axinl be operated, as a sludge, pump is provided, to pump sludge from the fun through any duct smaller in sludge sump to Number 2 mixing Fiameter than the tip of the fan Lank Provision is made for feed Wades is well known, and it is this ing soda ash, but it seems unlikely difficulty which has caused every that it will be necessary. About 10.1 parts of chlorine is added to American oil burner manufacturer
the filter effuent..
to use a centrifugal fan in automa- the burner design, where the gun. (ype hner is under consideration.
COMPLETE ELECTRICAL INSTALLATIONS
with
C. M, A. CABLES.
Advice and Estimates given
free on all
types of
LIGHTING & POWER INSTALLATION
by an experienced
ELECTRICAL ENGINEER
"retained at our Hong Kong Branch:
The General Electric Co. (of China), Ltd.
QUEEN'S BUILDINGS,
HONG KONG.
But, the value of an axial fan na opposed to centrifugal fans in auto- matic burners of that type is un- Zombited.
For central heating installations For large buildings, excellent oil burning plant and, as Mr. G. J. Collin says, the results of many years experience have rendered the conversion of boilors, proviously coal fired, matter of following established design. The steam jet} burner is perhaps not so frequently installed for central heating ng zor morly, but the large pressure jet installation, with its duplicate pumping and heating sets, oil hea- tera, burners and air directors; in
comes a spotlessly clean compart mens which can be usefully adapted as an uiring-room, or for any other domestic purpose.
J
Use Green Island Cement
for
Constructural Work of
Every Description.
HOW GREEN ISLAND CEMENT IS MADE
Green Island Cement is manufactured from hard limestone and olay. It is necessary that these materials should be finely ground in order that they may come into intimate contact with one another in the burning process.
The finely pulverised materials are "mixed in a certain definite proportion, roughly one part of clay to three of limestone, and are fed to the Rotary Kilns.
+
In these kilas they meet the hot gases and flames generated by pulverised coal blown in at the other end of the kilns, and after various chemical actions have taken place, they combine to form Portland Cement Clinker.
The Clinker is ground down with a small percentage of gypsum to regulate the setting -- time, and. Green Island Portland Cement is thus produced.
Although sounding so simple, in reality the process is an intricate combination of mechanical, physical and chemical operations, needing great *kill and care. Nothing but constant and
· accurate supervision will yield the results so well-known with Green Island Cement, namely, strength, uniformity and reliability.
USE GREEN ISLAND CEMENT
Issued by the
GREEN ISLAND CEMENT CO., LTD.
2ND FLOOR,
EXCHANGE BUILDING.
RIV
GARAGES and CAR
OWNERS
capable of dealing with boilers of LARGE STOCKS BALL BEARINGS CARRIED
the largest size and of handling all of any grade.
During the last few years the low-pressure air burner, both of the fixed and rotary type, has achieved considerable popularity; the im-. provement of semi-automatic con-
trols, with adjustment of both air and oil to meet the load, has pro- | od its value in the central heating. field. This type of plant is also
FOR ALL MAKES OF CARS
APPLY TO
DODWELL & Co., LTD.
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