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Книга по требованию: Engineering Experiment Station, Vol. 17

Товар № 11247255

August 1907 (Classic Reprint)

Вес: 0.91 кг.
Год издания: 2015
Страниц: 578 Переплет: мягкая обложка
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Excerpt from Engineering Experiment Station, Vol. 17: August 1907

This method of storing is not only the practice where large quantities of coal are to be taken care of, but there are very few power and heating plants and fuel-using industries that do not find it necessary to pile more or less coal on the ground at least temporarily until room can be made for it in the coal shed or boiler house. The practice in vogue in the coal fields, among coal dealers and all consumers of comparatively small quantities varies greatly. In general, however, it may be said that the coal is either stored in covered iron or wooden bins with slanting bottoms to facilitate its removal, or in ordinary covered bins with earth, cinder or wooden floors from which it is removed with the scoop. In power and heating plants the placing of the coal bins depends upon the position of the boilers and the method used for firing and transportation of the fuel to the building. The United States Navy, which uses about 250 000 tons of coal yearly, has been equipped with large storing facilities, each compartment in the station at the New York Navy Yards having a capacity of 525 gross tons, with floors of portland cement, roof of iron and side walls of portland cement, sand and anthracite cinders. On board vessels coal is stored in whatever room happens to be available.

Aside from these prevalent methods of caring for coal reserves, the practice of storing coal under water is coming into prominence, but the working out of this plan can not be said to have gone further than the experimental stage. The English Admiralty has been experimenting with submerged coal and the Western Electric Company of Chicago has recently built two bins of 4000 and 10 000 tons respectively below the ground level. The plan is to dump the coal into the bins directly from the car and flood it with water until needed for use, when a crane fitted with grab buckets will lift it to the car again.

As one reviews the literature of the subject, it is strikingly evident that well authenticated facts and data are very meagre, with much disagreement among those who have presumed to possess knowledge in the matter. There is a general belief that coal does deteriorate, but under what conditions, to what extent, and according to what principles, are certainly open questions at the present time. The following resume of the statements by various writers will be of advantage in gaining a present knowledge of the situation.

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