Method of recovering coal by coal handling operations and system therefor
    5.
    发明公开
    Method of recovering coal by coal handling operations and system therefor 失效
    通过煤炭处理操作恢复煤的方法及其系统

    公开(公告)号:EP0015736A3

    公开(公告)日:1980-10-01

    申请号:EP80300636

    申请日:1980-03-04

    IPC分类号: C10L09/00 C10L05/06 B01D12/00

    摘要: This specification discloses a greatly simplified method and system for recovering coal from a particulate coal bearing slurry (1) in which an appropriate hydrophobic liquid or emulsion of hydrophobic liquid in water (2) is introduced into the inlet of a centrifugal turbulent flow slurry pump (3) simultaneously with the introduction of said coal bearing slurry to said pump inlet, said hydrophobic liquid being introduced in a quantity sufficient to achieve substantially intimate contact between said hydrophobic liquid and coal particles in said slurry whereby the coal may be separated from the slurry by discharging the slurry from the pump directly over a simple static screen or other suitable separating device (4) whereupon the separated coal matter (5) may be collected for subsequent use. If desired, the coal within said slurry may be additionally agitated in any suitable manner, such as by means of an in-line flow promoting device (7) which causes additional contact between the agglomerates produced by the agitation archieved within the slurry pump (3).

    A method of preventing energy loss, self-heating and selfignition in peat stacks
    6.
    发明公开
    A method of preventing energy loss, self-heating and selfignition in peat stacks 失效
    防止PEAT堆场中的能量损失,自加热和自发的方法

    公开(公告)号:EP0244586A3

    公开(公告)日:1988-05-18

    申请号:EP87103152

    申请日:1987-03-05

    申请人: A. Jalander Oy

    发明人: Vuorela, Antti

    IPC分类号: C10F05/00 C10L09/00 C10L05/00

    CPC分类号: C10L9/00 C10F5/00

    摘要: The invention relates to a method of preventing the energy loss, self-heating and self-ignition of a peat stack. The rick storage of peat is often connected with a heating caused by exothermal reactions, which causes energy losses of the peat and even self-ignition. This problem has been solved by conducting inert protective gas into the stack, by which the air present in the stack is displaced or diluted and thus the aerobic exothermal reactions of the peat are prevented. It is preferable to insert inert protective gas in a liquid state into a stack heated up to critical point or into the heat centre of it, the gas rapidly cooling the stack or the centre and thus preventing even more efficiently the ignition of a stack fire. Covering the stack with a cover like a plastic foil considerably prolongs the presence of the inert-gas in the stack and thus improves the effect of the inert-gas treatment.

    Coal preparation
    7.
    发明公开
    Coal preparation 失效
    煤制备

    公开(公告)号:EP0113584A3

    公开(公告)日:1984-11-07

    申请号:EP83307892

    申请日:1983-12-22

    IPC分类号: C10L09/00

    CPC分类号: C10L9/00 Y10S44/903

    摘要: A method of preparing fine particulate coal for power generation on which the coal is pretreated by the oil agglomeration method (10, 11) to increase the carbonaceous content and produce coal-oil agglomerates. These are fed to a fluidized bed (15) in which the fluid is steam. The bed as concentration is variable and agglomerates leaving the bed are disintegrated in a steam jet (21) which completes separation of the oil from the coal and forms the fine particle coal feed. The oil and steam are separated from the coal feed which continues in the fuel delivery system 29 to the power generation plant. The only steam mix is condensed 37 and the two phases separated (39) and recycled for further use. A control means is provided which is responsive to steam generation demand and activates changes in the generation of coal oil agglomerates (10, 11) and the discharge of coal particles from the fluid bed, disintegrator 15, 21.

    Apparatus and method for drying low rank coals
    10.
    发明公开
    Apparatus and method for drying low rank coals 失效
    用于干燥低排烟的装置和方法

    公开(公告)号:EP0184372A3

    公开(公告)日:1988-01-13

    申请号:EP85308589

    申请日:1985-11-26

    IPC分类号: C10L09/00 C10F05/00

    CPC分类号: C10L9/00 C10F5/00

    摘要: Process and apparatus are disclosed for removing a substantial portion of water and impurities from low rank coal and peat, whereby an improved coal or peat product (not found in nature) is obtained. The low rank coal and peat are subjected to a superheated gaseous medium, thereby substantially desorbing the moisture from the coal or peat and producing superheated gases. A substantial portion of the superheated gases produced are recycled back in contact with the coal being dried. Sufficient heat is added to the recycled gases, in response to monitoring, so that the recycled gases are maintained in a substantially superheated condition throughout. This process produces a dried, substantially purified product which retains a substantial portion of its volatile content, which has an improved heat value per unit weight, and which will not absorb substantial moisture when stored or transported. In one embodiment, the process utilizes superheated steam to initiate the drying process. In another embodiment, that minor portion of the superhreated gases in excess of the original volume not being recycled are recovered, and the fuel content thereof is used to provide energy for reheating the gases being recycled. In yet another embodiment, the processes are maintained at low pressures of under approximately 50 inches water column pressure. The process and apparatus provided also removes a substantial portion of the impurities such as sulfur, from the low rank coals and peat. The dried product may be cooled, and the impurities may be separated therefrom.