Bubbling fluidized bed device used for desorptive regeneration of powdery sulfur-bearing active coke

Abstract

The invention relates to a bubbling fluidized bed device used for desorptive regeneration of powdery sulfur-bearing active coke, which includes a desorption column, in which an internal reheater, a bubbling fluidizing section and a cooling section are respectively formed from top to bottom. The bubbling fluidizing section includes an air distributor plate at the bottom and delivery pipes fixed tothe air distributor plate; the cooling section is a tube heat exchanger, which includes a heat exchange medium pipe box at exterior and heat exchange pipes at interior; the bubbling fluidizing sectionis arranged vertically; a desorbed regenerated active coke outlet is formed in the bottom. According to the required temperature during the desorption of an active coke adsorbent, reaction temperature of the bubbling fluidized bed is controlled; through a separation device, the carried powdery coke and high-concentration SO2 gas are separated; according to the desorption feature of the powdery sulfur-bearing active coke and high heat and mass transfer efficiencies of reaction gas in the bubbling fluidized bed, two arrangements of the desorption column are disclosed. The device can achieve high-effective regeneration of the sulfur-bearing active coke and recycling of sulfur and has extensive application prospect.

Description

technical field [0001] The invention belongs to the field of air pollutant treatment and resource utilization of desulfurization waste, and in particular relates to a bubbling fluidized bed device for desorption and regeneration of powdery sulfur-laden active coke. Background technique [0002] my country is a big coal-burning country. A large amount of fossil energy such as coal, oil and natural gas is used in industrial production. The three major industrial pollutants are SO 2 , NOx and soot, using limestone-gypsum wet desulfurization technology to desulfurize SO in flue gas 2 For processing, there are also disadvantages such as huge water consumption and the production of inferior desulfurized gypsum, which causes secondary pollution to the environment. [0003] Activated coke / charcoal prepared from coal has a rich pore structure that can reduce the SO in flue gas 2 For efficient deep removal, SO 2 It is adsorbed in activated coke / charcoal simultaneously with water, s...

AI Technical Summary

Problems solved by technology

[0004] The desorption of sulfur-loaded activated coke / carbon in the prior art uses shell-and-tube heat exchangers for heating and desorption. This indirect heating method makes the mass and heat transfer efficiency of sulfur-loaded activated coke / carbon limited. Therefore, it is necessary to improve the mass transfer and heat transfer efficiency of sulfur-loaded activated coke / carbon to improve the desorption efficiency.

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