Brighton 'B' Power Station cont.
Heating & Condensing Plant
The six turbo-alternators were arranged longitudinally in the turbine house. Four, having a capacity of 55.5 MW were of the three cylinder type with single flow H.P. cylinder, single flow I.P, and double flow L.P, cylinder with the alternators air cooled. The last two turbo-alternators had a capacity of 60 MW and were of a two cylinder type with single flow H.P. cylinder and single/double flow I.P. combined with quadruple flow L.P. cylinder.
Turbine room, looking west
The steam conditions at the H.P. turbine stop valve were 900 Ibs/sq. in, and 482"C (900"F). The generators operated at 3,000 RPM and the two 60 MW sets were cooled by hydrogen at a pressure of 0.5 Ibs/sq. inch. The rated terminal voltage was 11.8 kV at a power factor of 0.8. Main and pilot exciters were direct-driven from the generator shaft.
The condensers were twin shell, two flow, surface type designed to maintain a vacuum of 29" Hg when supplied with 45,000 galls/min. of cooling water at 15"C and condensing 340,000 Ib. of steam per hour. Two 100% duty, three stage, steam jet air ejectors extracted air from the condenser.
After passing through the turbine the steam exhausts into a condenser, and again becomes water which is returned to the boiler.
Two 100% duty extraction pumps delivered condensate to the three L.P. stages of feed heating from which it passed to a de-aerator. The condensate then discharged to a de-aerator extraction pump before passing to the main boiler feed pump and three high pressure feed heating stages.
Circulating Water System
The "B" Station required approximately 280,000 galls/minute of the sea water for condenser cooling under full load conditions.
One of the two boiler make-up water treatment units.
This was normally pumped from the tidal side of the harbour locks and discharged, after use, to sea. It could, however, be diverted into the eastern (locked) arm of the harbour and this was done in order to maintain the level required by the Harbour-master in this section, i.e. to make up losses including water used for locking operations.
The control room was on the centre line of the station and contained the main 132 kV and 33 kV control panels for operating switchgear at two substations situated at Southern Cross and Fishersgate. All main switching and synchronising of the six generators was carried out on individual control desks, as was the switching of 3.3 kV auxiliary supplies.
Grid Control Centre
In the grid control centre directions were issued for feeding the high voltage current into the National system.
Ash & Dust Plant
Ash from the boilers was washed by high pressure water jets to a central collecting pit whence it was removed by grabbing crane to a storage and drainage hopper. After draining, the ash was conveyed to a disposal point where lorries were loaded to take it from the station.
Current from the generators was stepped up to a higher voltage by the windings of oil-cooled transformers.
The dust handling plant was designed to remove flue dust accumulating in the collecting hoppers of the economisers in the mechanical grit arrestors and electrostatic precipitators of the eleven boilers, and from the base of the two chimneys. The plant consisted of hydrovactors creating a vacuum in a pipeline which transfered the dust from the hoppers to central collecting bins capable of holding 2,100 tons.
The dry dust was then fed by rotary feeders to four double shaft mixers where it was conditioned or wetted before disposal by lorry to brick manufacturers, road builders or waste ground for levelling. Dry dust could be loaded direct to tanker lorries for use in concrete manufacturing. With the station generating on full load, approximately 305 tons dust and 66 tons ash were disposed of daily.
In the substation the switchgear and its operating mechanism controlled power flow on grid lines.
Water treatment Plant
A demineralisation plant was installed to produce high quality make-up water from the town main supply. Raw water was fed in series through the first two treatment units which turned all the dissolved mineral salts into their corresponding acids, which were then absorbed. A degasifier tower scrubbed out the carbon dioxide with a stream of air and a final unit removed the silica and was capable of converting any neutral salts to the corresponding hydroxide.
The New Gas Powered Station
Shoreham's New Power Station
This picture was taken from Albion Street / Fishersgate Terrace looking west. When I get some details of the new station I shall make it available here.