electrical and mechanical tasks and repairs were carried out during the year. A new ash conveyor has been provided by the manufacturers.
8.22. At the Kennedy Town Incinerator Plant certain modifications were made to mitigate the effects of heavy dust fall-out and fouling of the cross ducts, cool gas duct and grit collectors. Modifications were also made to one unit to improve the drying of refuse prior to combustion and its combustion thereafter. In connection with the combustion of refuse the modifications included fitting baffles under the Burning Grate to reduce tramp air through the sides and back of the grate; raising the end bars of the burning grate to prevent excessive fire-bed tapering and consequent loss of output; lowering and extending the Bye-pass Arch to direct the hot gases more closely over the refuse on the Drying Grate and the lagging of the Downdraught ducting. During the period under review, 1,757 mechanical and electrical repairs were carried out.
8.23. The Compost Plant at the Lai Chi Kok Incinerator Plant, commissioned on 18th March, 1969, has been in operation throughout the year during which period a number of experiments have been carried out, and modifications made, to improve the quality and quantity of the product. 365 maintenance tasks and repairs were carried out by the staff of the Incinerator Plant during the year.
8.24. The Cheung Sha Wan Abattoir was taken over for maintenance in May 1969. Cattle slaughtering commenced in August 1969 and full scale pig slaughtering at the end of the year. Only one major failure occurred and that on the pig inspection conveyor. All difficulties so far encountered have been entirely due to the lack of spare capacity on the cattle and pig lines. Rapid repair of any breakdown is therefore essential as is preventive maintenance. 846 maintenance tasks and minor repairs were carried out by the staff of the Lai Chi Kok Incinerator Plant. The machinery at Kennedy Town Abattoir continues to give very little trouble. Modifications have been carried out at the request of the Urban Services Department in the light of operating experience. 2,945 maintenance tasks and repairs were carried out by the staff of the Kennedy Town Incinerator Plant.
Air-Conditioning and Refrigeration Plants
8.25. These Sections, at the end of the year, operated 34 major air-conditioning plants totalling 4,093 tons of refrigeration. In addition, maintenance visits were paid to non-attended plant; these included
electrical and mechanical tasks and repairs were carried out during the year. A new ash conveyor has been provided by the manufacturers.
8.22. At the Kennedy Town Incinerator Plant certain modifications were made to mitigate the effects of heavy dust fall-out and fouling of the cross ducts, cool gas duct and grit collectors. Modifications were also made to one unit to improve the drying of refuse prior to com- bustion and its combustion thereafter. In connection with the combus- tion of refuse the modifications included fitting baffles under the Burning Grate to reduce tramp air through the sides and back of the grate; raising the end bars of the burning grate to prevent excessive fire-bed tapering and consequent loss of output; lowering and extending the Bye-pass Arch to direct the hot gases more closely over the refuse on the Drying Grate and the lagging of the Downdraught ducting. During the period under review, 1,757 mechanical and electrical repairs were carried out.
8.23. The Compost Plant at the Lai Chi Kok Incinerator Plant, com- missioned on 18th March, 1969, has been in operation throughout the year during which period a number of experiments have been carried out, and modifications made, to improve the quality and quantity of the product. 365 maintenance tasks and repairs were carried out by the staff of the Incinerator Plant during the year.
8.24. The Cheung Sha Wan Abattoir was taken over for maintenance in May 1969. Cattle slaughtering commenced in August 1969 and full scale pig slaughtering at the end of the year. Only one major failure occurred and that on the pig inspection conveyor. All difficulties so far encountered have been entirely due to the lack of spare capacity on the cattle and pig lines. Rapid repair of any breakdown is therefore essential as is preventive maintenance. 846 maintenance tasks and minor repairs were carried out by the staff of the Lai Chi Kok Incinerator Plant. The machinery at Kennedy Town Abattoir continues to give very little trouble. Modifications have been carried out at the request of the Urban Services Department in the light of operating experience. 2,945 maintenance tasks and repairs were carried out by the staff of the Kennedy Town Incinerator Plant.
Air-Conditioning and Refrigeration Plants
8.25. These Sections, at the end of the year, operated 34 major air-conditioning plants totalling 4,093 tons of refrigeration. In addition, maintenance visits were paid to non-attended plant; these included
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