Horizontal semi-dry desulfurization box process technology

Abstract

The invention discloses a horizontal semi-dry desulfurization box process technology. The technology comprises the following steps: flue gas goes through a flue gas inlet and then enters a desulfurization reactor, the outlet expansion section, externally connected with a Venturi throat, of the desulfurization reactor is provided with a water spray device, and atomized water sprayed by the water spray device reduces the smoke temperature in the desulfurization reactor; the flue gas carrying a desulfurization agent enters a desulfurization box, segment boxes are arranged in the desulfurization box, a fluidized bed is arranged at the bottom of every segment box body, the fluidized beds increase the conversion frequency of a reaction of SO2 and Ca(OH)2, greatly enhance the mass transfer and heat transfer between a gas and a solid, and greatly improve the desulfurization rate; and purified dust-containing flue gas is laterally discharged from the top of an absorption tower connected with aflue gas outlet, enters a desulfurization deduster, goes through a boiler fan and is discharged into a chimney. The design of the desulfurization tower becomes horizontal from horizontal, so the height of the desulfurization tower is greatly reduced, and the use amount of a material is reduced, thereby the production cost is reduced, and the technology has high practical values, and is worth promoting.

Description

technical field [0001] The invention relates to a device and method for purifying flue gas of combustion equipment, belonging to the technical field of flue gas purification, in particular to a horizontal semi-dry desulfurization box technology. Background technique [0002] Circulating semi-dry flue gas desulfurization technology is a relatively advanced flue gas desulfurization technology emerging in the world in recent years. It has the advantages of relatively low investment, relatively high desulfurization efficiency, high equipment reliability, and low operating costs; It also has the advantages of no sewage discharge in the dry process and easy handling of the desulfurized product, so it has attracted widespread attention. However, when the actual planning is based on parameter design, calculated according to the reaction time of desulfurizer and flue gas, no matter how much flue gas is processed, the height of the desulfurization tower is about 40 meters, which makes...

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Problems solved by technology

However, when the actual planning is based on parameter design, calculated according to the reaction time of desulfurizer and flue gas, no matter how much flue gas is processed, the height of the desulfurization tower is about 40 meters, which makes the flue gas treatment of small and medium-sized boilers relatively expensive. High operating costs, high costs and site limitations have seriously affected the promotion and application of circulating semi-dry flue gas desulfurization technology

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