Mechanical Handling Aspects of the Tilbury Grain Terminal

The grain terminal for the Port of London Authority (P.L.A.) began commercial operation in April 1969. It is designed for discharge of ships up to about 45 000 ton dead weight (d.w.) at rates up to a maximum of 2000 ton/h. The installation provides two discharging machines of the marine tower type, 105 000 ton of silo storage capacity and an ability to handle from ships to silo, rail, road, coaster or to adjacent flour mills. It also permits loading out to coaster or barge either by direct trans-shipment or from silo. Many alternative handling routes are provided and a very large degree of remote control has been incorporated. The majority of the routes are capable of handling up to 1000 ton/h over a single conveyor. The marine towers are unique in Europe and probably incorporate a greater degree of sophistication than exists in any similar equipment in the world. This paper describes briefly the background leading to the construction of the terminal and the layout of the whole installation. Some of the more interesting points in the mechanical handling control system employed with particular reference to the marine towers, methods of routing, tripper control and dust suppression are described in detail. Comparisons are made between the installation at Tilbury and the installation at present under construction for the Mersey Docks and Harbour Company at Seaforth.

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COAST PROTECTION AGAINST THE ACTION OF WAVES AND CURRENTS

Coastal Engineering Proceedings ◽

10.9753/icce.v17.127 ◽

1980 ◽

Vol 1 (17) ◽

pp. 127

Author(s):

Leren P. Mikhailov ◽

Sergei M. Uspenskii

Keyword(s):

Wave Energy ◽

Storage Capacity ◽

Shore Line ◽

Storage Reservoirs ◽

The World ◽

Waves And Currents ◽

Hydroelectric Projects ◽

Under Construction ◽

The Given ◽

Natural Water Bodies

According to the information available in the USSR, now in the world there are more than 13000 reservoirs with storage capacity over 1 million m? in service and under construction. The largest ones are illustrated in Table 1. In some countries these storage reservoirs constitute rather a great per cent relative to all the reservoirs of the given country. (Table 2). Lately, such reservoirs have substantially grown in number in many countries of the world, especially in the USSR and USA, what is seen from the chart (Fig.1). In this connection, one can conclude on the great area of some reservoirs (reaching sometimes thousands of square kilometers), on their importance in the balance of the controlled runoff, making up in some countries over 95 per cent and on the intensive increase of their storage capacity beginning from the fifties of the present century. The above said is one of the reasons of greater interest in the action of waves and currents of the shore line showing up most intensively on the largest storage reservoirs. The length of the shore line of the USSR reservoirs is over 40000 km. The length of the erosion shores of storage reservoirs at the hydroelectric projects on the Volga and Dnieper River make up more than 30 per cent of the total shoreline of these reservoirs, while that of the reservoirs on the Kama River - 35 per cent. Most intensively the erosion is going on in the first decades of the operation of the reservoirs. The action of waves on the shore results in formation of the underwater slope with a gradient at which the wave energy is dissipated on the shoal, and the shore erosion slows gradually down until it ceases completely. However, it is rather difficult now to determine the period of the shore formation attenuation process in view of the fact that the problem of distribution of wave energy between all the phenomena taking place here is not properly studied yet and it is hot also clear what width and gradient of the shoal can fully baffle the wave energy and how much time it will take for such a shoal to get formed. The observation carried out on the natural water bodies well prove it.

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Modern Dynamic Positioning (DP) System of ORP ‘Kormoran’ — Class Mine Destroyer

Zeszyty Naukowe Akademii Marynarki Wojennej ◽

10.2478/sjpna-2018-0031 ◽

2018 ◽

Vol 215 (4) ◽

pp. 143-155

Author(s):

Paweł Zalewski ◽

Roman Haberek ◽

Mirosław Chmieliński

Keyword(s):

Control System ◽

Remote Control ◽

Dynamic Positioning ◽

Main Task ◽

Positioning System ◽

Allocation Model ◽

Positioning Control ◽

Positioning Systems ◽

Dynamic Positioning System ◽

The World

Abstract The paper presents the dynamic positioning system (DP), particularly its thruster allocation model, designed for ORP ‘Kormoran’, a Polish mine destroyer built for the Polish Navy in Remontowa Shipbuilding S.A. in Gdańsk. The ORP ‘Kormoran’ ship is the newest and best equipped minehunter ship in Europe. The main task of the new Polish mine destroyer is to search for, classify, identify and combat marine mines and improvised underwater explosives, recognize waterways, transport mines, deploy mines and provide remote control of self-propelled anti-mine platforms. The dynamic positioning control system of the ship presented in the article was constructed by Autocomp Management Ltd. from Szczecin, the only in Poland and one of the few producers of dynamic ship positioning systems in the world.

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