Flue gas desulfuring method and its device for density current fluidised bed

A technology of fluidized bed and fluidized bed reactor, which is applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as system complexity and increased operating costs, and achieve simple maintenance, reduced operating costs, The effect of simple installation

Inactive Publication Date: 2003-01-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the atomization of the desulfurizer is strengthened by using compressed air and water pump pressure, although the mixing and contact between the desulfurizer and the flue gas is improved, the system is also complicated and the operating cost is significantly increased.

Method used

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  • Flue gas desulfuring method and its device for density current fluidised bed
  • Flue gas desulfuring method and its device for density current fluidised bed
  • Flue gas desulfuring method and its device for density current fluidised bed

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Embodiment Construction

[0012] Figure 1 is Different density fluidized bed flue gas desulfurization device configured for 4t / h boiler. After the flue gas from the boiler is boosted to 6000Pa by the blower, it enters the fluidized bed reactor to fluidize the bed material, passes through the different density fluidized bed composed of quartz sand bed material and calcium hydroxide particles, and carries a part of the hydrogen oxidation The fine calcium particles continue to undergo desulfurization reaction in the suspension space. At this time, the molar ratio of calcium to sulfur is 1.5, and the desulfurization efficiency is 98%. The reactor is composed of machine-made red bricks, steel frame and anti-corrosion lining; the air distribution plate is composed of stainless steel plate and stainless steel mesh. The opening rate of the stainless steel plate is 5%. In order to prevent the loss of bed material, a stainless steel mesh is installed under the air distribution plate , the stencil specification ...

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Abstract

The present invention relates to the desulfurizing of gas containing sulfur oxide exhausted in industrial process and aims at providing flue gas desulfurizing device with low cost, simple structure and easy maintenance. Sulfur containing flue gas is made to enter to the fluidized reactor from bottom, desulfurizing slurry is made to enter to the reactor from the top, and flue gas is forced to pass through large particle coagulating area comprising large particle bed material and calcium hydroxide and the suspension area comprising calcium hydroxide particle, so that desulfurizing agent and SO2 can contact in sufficient time and space for full chemical reaction. The present invention has high desulfurizing efficiency and high desulfurizing agent utilization.

Description

Technical field: [0001] The invention relates to the field of desulfurization of gas containing sulfur oxide compounds in industrial process discharge gas. Background technique: [0002] The circulating fluidized bed is an important reaction device in the chemical industry, power, building materials and other industries. It was used for flue gas desulfurization in the 1980s. Although the circulating fluidized bed flue gas desulfurization system developed at home and abroad has undergone various improvements, it has not deviated from the original technical concept, that is, the circulating fluidized bed is used as the reactor, and the system requires water pumps, air compressors, Lime slurry pump, desulfurization agent injection mechanism, cyclone separator, fly ash return mechanism, not only the system is still very complicated, but the performance of the lime slurry nozzle used has a great influence on the desulfurization effect, directly affecting the mixing of desulfuriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/83
Inventor 刘柏谦
Owner UNIV OF SCI & TECH BEIJING
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