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Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type

A circulating fluidized bed, desulfurization and dust removal technology, which is applied in the field of flue gas purification, can solve the problems of unevenness of large-diameter desulfurization towers, the influence of desulfurization agent utilization, and large amount of discharged flue gas, and achieves compact structure, optimized distribution mode, The effect of dealing with a large amount of flue gas

Active Publication Date: 2008-12-10
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large amount of flue gas exhausted by large-scale coal-fired power plants and the large load changes, the fluency in the large-diameter desulfurization tower is not uniform, which affects the use of desulfurizers, making this technology only applicable to small and medium-sized Flue gas desulfurization of coal-fired units

Method used

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  • Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type
  • Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type
  • Method and equipment for integrated stack gas desulfurization and dust removal of circulating fluid bed in damp dry type

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Embodiment Construction

[0028] see Figure 1 to Figure 4 , The device of the present invention includes a pre-separation chamber 10 , a desulfurization tower 15 and a bag filter 7 . The desulfurization tower 15 is formed by connecting the straight cylinder section 4 and the conical cylinder section 6 , and the bottom of the conical cylinder section 6 is connected with the pre-separation chamber 10 through the provided transition section 9 . Five to nine through pipes are built in the transition section 9, and each through pipe is placed in the tube bundle 12, and the tube bundle 12 and the inner wall of the transition section 9 are welded and supported. The bottom of the pre-separation chamber 10 is provided with a conical bottom with an ash outlet 11, and its two-way sides are provided with a flue gas inlet 1 in the form of tangential rotary air intake. There are two layers of spraying mechanism 1 2 and spraying mechanism 2 3 in the cone-cylinder section 6, which can inject different flow rates of ...

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Abstract

The invention relates to a semi-dry circulating fluidized bed flue gas desulfurization and dust-collection integrated method and its equipment, belonging to the field of flue gas purification technology. Said equipment includes a desulfurization tower; said desulfurization tower is composed of mutually-connected straight barrel section and conical column body section. The bottom portion of said conical column body section is connected with a preseparation chamber by meansof a transition section, the bottom portion of the preseparation chamber is equipped with a conical bottom with ash-falling mouth, and the bilateral sides of said preseparation chamber are equipped with flue gas inlets with tangential rotary gas-feeding mode. In the interior of conical column body section a multilayer slurry-spraying mechanism is set, a first flue gas outlet is set in the upper portion of the straight barrel section and connected with a bag dust collector, on the oblique surface of conical bottom of said bag dust collector a material-returning oblique groove is set, and the connection of bottom end of material-returning oblique groove is connected with desulfurization tower, and is placed under the lower-layer slurry-spraying mechanism. The upper portion of side surface of the bag dust collector is equipped with a second flue gas outlet.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a large-capacity semi-dry circulating fluidized bed flue gas desulfurization and dust removal integration method and a device for realizing the method. Background technique [0002] Flue gas dust removal and sulfur dioxide removal are two key aspects of controlling environmental pollution. As the country's requirements for environmental protection become more and more stringent, not only the emission standards of smoke and dust have been improved, but also the control of emission of sulfur oxides has been strengthened. However, the technical practicability and technical limitations of the dust removal integration in the prior art are obvious. The system operation reliability of the existing desulfurization and dust removal integrated technology is poor, and it is difficult to realize the coordinated operation of the desulfurization system and the dust removal syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/83
Inventor 赵旭东项光明姚强徐杰英
Owner TSINGHUA UNIV
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