Circulating fluidized bed flue gas desulfurizating and returning device
A circulating fluidized bed and flue gas technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of ash failure, uneven reaction between induced draft fans and desulfurization towers, and uneven ash loading of dust collectors. , to achieve the effect of reducing the number of equipment, facilitating maintenance and maintenance, and shortening the space distance
Inactive Publication Date: 2012-12-05
南京龙玖环境工程有限公司
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[0006] The utility model patent with the application number 200920233508.0 proposed by the applicant discloses a circulating fluidized bed flue gas desulfurization return device. Faults occur, so that the ash in the dust collector is uneven, causing uneven reactions in the boiler, induced draft fan and desulfurization tower
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Embodiment 1
[0019] This embodiment provides a circulating fluidized bed flue gas desulfurization return device, connected as figure 1 As shown, it includes desulfurization tower 1, dust collector ash hopper 2 and intermediate ash bin 3, the lower ash port 6 of dust collector ash bin 2 is connected to the middle ash bin 3 through the first-stage screw conveyor 4, and the middle ash bin 3 is embedded with two The first-stage screw conveyor 5 is connected to the desulfurization tower 1 through the second-stage screw conveyor 5. The lower ash port 6 of the ash hopper of the dust collector is connected to the first-stage screw conveyor 4 through the buffer elbow 7, and the connection is as follows figure 2 As shown, the angle of the buffer elbow is an acute angle less than 45°.
[0020] The flue gas enters the desulfurization tower 1, and desulfurization agent is added into the desulfurization tower 1 at the same time to carry out the desulfurization reaction. The unreacted desulfurization a...
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The invention belongs to the technical field of dry desulphurization for flue gas, and relates to a returning device, in particular to a circulating fluidized bed flue gas desulfurating and returning device. The circulating fluidized bed flue gas desulfurating and returning device comprises a desulphurization tower, an ash hopper of an ash collector and a middle ash bin. An ash discharge outlet of the ash hopper of the ash collector is connected with the middle ash bin through a primary screw conveyor so that desulfurized ash is horizontally conveyed to the middle ash bin; the middle ash bin is connected with the desulfurization tower through a secondary screw conveyer so that most desulfurized ash in the middle ash bin is conveyed into the desulfurization tower to be subjected to reaction again; and thus, the desulfurized ash is recycled by multiple times. The ash discharge outlet of the ash hopper of the ash collector is connected with the primary screw conveyer through a buffer bend. Failures of the screw conveyor due to abrupt ash discharge are avoided by the simple structure that the ash discharge outlet of the ash hopper of the ash collector is connected with the primary screw conveyor through the buffer bend skillfully, and uniform reactions of boilers, induced draft fans and the desulfurization tower due to uniform ash discharge of the ash collector are avoided.
Description
technical field [0001] The invention belongs to the technical field of flue gas dry desulfurization, and relates to a material returning device, in particular to a circulating fluidized bed flue gas desulfurization returning device. Background technique [0002] Harmful gases such as sulfur dioxide and nitrogen oxides in the flue gas produced when coal, oil, and gas are burned are discharged into the atmosphere, causing acid rain, destroying the ecological environment, and affecting human health. In response to the more stringent control standards proposed by my country's relevant environmental protection regulations on the allowable emission concentrations of sulfur dioxide and nitrogen oxides in flue gas, various flue gas desulfurization technologies, methods and devices have emerged as the times require. [0003] Coal-fired sulfur dioxide control methods can be divided into three categories: desulfurization before combustion, desulfurization during combustion, and desulfu...
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Login to View More IPC IPC(8): B01D53/83B01D53/50
Inventor 黄震刘卫民邵亚锋
Owner 南京龙玖环境工程有限公司