7.19. The Kennedy Town Incinerator has been running continuously since July 1968 when the downdraught system was installed. While there is little doubt that the principle of the downdraught system is sound, the construction still leaves much to be desired. The manufacturers are investigating this problem and trials are in progress on a new system fitted to one unit. Steam evaporation trials were carried out on each boiler of the incinerator plant towards the end of 1968; in each case the design figure of 15,000 lbs/hr. at 240 p.s.i.g. was reached. However, the present method of soot blowing is inadequate to remove the flue gas dust which readily adheres to the boiler tubes and quickly reduces the rate of evaporation. This problem is also being investigated by the manufacturers.
7.20. The Kennedy Town Abattoir has been fully operational since October 1968. As yet maintenance staff of this Section have had little major repair work to carry out and at present are having little difficulty in maintaining the plant.
7.21. The Hospital Engineering Section continued to operate and maintain the varied plant in government and military hospitals; in addition 23,088 repairs to plant were carried out. A large reduction in the number of machinery breakdowns in the Queen Elizabeth Hospital laundry has been noted.
7.22. Because there was excessive vibration, one of the air-conditioning compressors at Queen Elizabeth Hospital was opened up for inspection during the winter. Extensive damage to the impeller, labyrinth glands and shaft was found to be due to a bent shaft but no conclusion could be arrived at as to why the shaft had bent. New labyrinths and shaft were made locally and the compressor was repaired in time for the hot weather. In the same hospital, combustion chamber stays were renewed during overhaul in one of the boilers.
7.23. A system of planned preventative maintenance is gradually being introduced in both the Queen Elizabeth and Queen Mary Hospitals. Provided some outstanding staff vacancies are filled the system will be introduced in the other hospitals during the coming year.
New Projects Section
7.24. Considerable assistance in an advisory capacity was again given to many government departments and offices on specialist matters relating to mechanical engineering work.
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7.19. The Kennedy Town Incinerator has been running continuously since July 1968 when the downdraught system was installed. While there is little doubt that the principle of the downdraught system is sound, the construction still leaves much to be desired. The manufac- turers are investigating this problem and trials are in progress on a new system fitted to one unit. Steam evaporation trials were carried out on each boiler of the incinerator plant towards the end of 1968; In each case the design figure of 15,000 lbs/hr. at 240 p.s.i.g. was reached. However, the present method of soot blowing is inadequate to remove the flue gas dust which readily adheres to the boiler tubes and quickly reduces the rate of evaporation. This problem is also being investigated by the manufacturers.
7.20. The Kennedy Town Abattoir has been fully operational since October 1968. As yet maintenance staff of this Section have had little major repair work to carry out and at present are having little difficulty in maintaining the plant.
7.21. The Hospital Engineering Section continued to operate and maintain the varied plant in government and military hospitals; in addition 23,088 repairs to plant were carried out. A large reduction in the number of machinery breakdowns in the Queen Elizabeth Hospital laundry has been noted.
7.22. Because there was excessive vibration, one of the air-condition- ing compressors at Queen Elizabeth Hospital was opened up for inspection during the winter. Extensive damage to the impeller, labyrinth glands and shaft was found to be due to a bent shaft but no conclusion could be arrived at as to why the shaft had bent. New labyrinths and shaft were made locally and the compressor was repaired in time for the hot weather. In the same hospital, combustion chamber stays were renewed during overhaul in one of the boilers.
7.23. A system of planned preventative maintenance is gradully being introduced in both the Queen Elizabeth and Queen Mary Hospitals. Provided some outstanding staff vacancies are filled the system will be introduced in the other hospitals during the coming year.
New Projects Section
7.24. Considerable assistance in an advisory capacity was again given to many government departments and offices on specialist matters relating to mechanical engineering work.
87
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