Method and apparatus for cooling a material to be removed from the grate of a fluidized bed furnace
A technology of fluidized bed cooler and fluidized bed furnace, which is applied in the direction of fluidized bed combustion equipment, fluidized bed furnace, lighting and heating equipment, etc. Problems such as the number of material flow and furnace materials, etc., to achieve the effect of easy automation
Inactive Publication Date: 2006-09-06
奥特泰克公司
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Problems solved by technology
[0004] One problem with this prior art apparatus and method is the inability to control and precisely regulate the continuous flow of material to be removed and cooled from the fluidized bed furnace
[0007] One problem with this prior art apparatus and method is that the continuous flow of material to be removed and cooled from the fluidized bed furnace and the amount of charge cannot be accurately measured
Method used
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Embodiment Construction
[0045] The following exemplary embodiments of the invention relate to the calcination of zinc concentrate in connection with the hydrometallic production of zinc. The purpose of calcining zinc concentrates is to convert zinc sulphide to a soluble form prior to solution treatment. This transformation is accomplished in a fluidized bed furnace where, after ignition, the concentrate bed is oxidized at a temperature of about 900°C to 1000°C.
[0046] Although the invention is described here in connection with zinc production, the invention is applicable to any other application in which a fluidized bed furnace is used and the high temperature granular solid material is cooled to a lower temperature prior to further processing. Thus, the fluidized bed furnace may be, for example, a fluidized bed furnace used in a power plant or the like.
[0047] Remove the produced calcined products from the calciner at a rate of 5-8t / h. Most of the calcined products come out of the calcined kiln...
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The invention relates to a method and an apparatus for cooling a material to be removed from the grate of a fluidized bed furnace. Material at a high temperature is passed from the grate of the fluidized bed furnace into a fluidized bed cooler in charges of a given size by measuring the quantity of the material accumulating in the fluidized bed cooler. When the quantity of the material in the cooler has reached a predetermined limit value, the supply of material into the fluidized bed cooler is prevented. The charge is cooled in the fluidized bed cooler by fluidization air and via heat transfer into a cooling liquid circulation system and the temperature of the charge is measured. The charge is removed when the temperature of the charge has fallen to a predetermined limit value. The second end ( 5 ) of a supply conduit ( 3 ) is provided with a supply valve ( 15 ) actuated by a power means ( 16 ). A discharge conduit ( 14 ) is provided with a discharge valve ( 17 ) actuated by a second power means ( 18 ). Quantity detection means ( 19, 20 ) are provided to produce quantity data regarding the amount of material in a fluidized bed space ( 11 ), and temperature measuring means ( 21 ) are provided to produce temperature data. A control device ( 22 ) controls the first power means ( 16 ) to open and close the supply valve ( 15 ) and the second power means ( 18 ) to open and close the discharge valve ( 17 ) on the basis of the quantity data and temperature data and the predetermined limit values of quantity and temperature so that the loading of material into the fluidized bed space and its cooling and removal from the fluidized bed space take place in a charge-by-charge and cyclic manner.
Description
technical field [0001] The invention relates to a method as defined in the preamble of claim 1 . Furthermore, the invention relates to a device as defined in the preamble of claim 14 . Background technique [0002] In the prior art, specification US 4,227,488 discloses an apparatus for cooling coarse material removed from the grate of a fluidized bed furnace. The apparatus includes a feed conduit having an upper first end leading to a grate of a fluidized bed furnace for receiving material to be cooled entering the feed conduit from the grate. In addition, the plant includes a fluidized bed cooler. The fluidized bed cooler has a shell, and the second end of the lower part of the feed pipe leads into the upper part of the shell. The housing encloses an interior space for receiving material. A coolant pipe for cooling the material in the interior space is connected to the housing. The apparatus also includes a second grate having a plurality of through holes. The second ...
Claims
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IPC IPC(8): F23C10/24F23C10/28B01J8/24F22B31/00C10J3/52F27B15/09F27B15/16F27B15/18F27D9/00F27D19/00
CPCF22B31/0084F27B15/18F27B15/16F23C10/24C10J2300/1625F27B15/09Y02E20/18F27D9/00F27D19/00C10J3/523F22B31/00F23C10/00
Inventor J·尼贝里V·卡特萨罗H·西里莱H·佩雷拉赫蒂
Owner 奥特泰克公司