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Device and method for producing magnesium sulfite by flue gas desulfurization

A magnesium sulfite and flue gas technology, applied in magnesium sulfite and other directions, can solve the problems of increasing desulfurization operating costs, high power consumption, and high production costs per ton of ore, reducing desulfurization operating costs, ensuring desulfurization efficiency and reducing The effect of running costs

Active Publication Date: 2015-04-29
ZHONGJING ENVIRONMENTAL TECH CO LTD
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Problems solved by technology

The device and method of the present invention are especially suitable for the production of magnesium sulfite by using waste slurry from flue gas desulfurization of coal-fired boilers, and can solve the problem of large power consumption, more steam, and production costs per ton of ore for the production of magnesium sulfate oxidation fans from waste liquid after magnesium desulfurization. Higher and increased desulfurization operating costs and other issues

Method used

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  • Device and method for producing magnesium sulfite by flue gas desulfurization

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Embodiment 1

[0064] figure 1 It is a schematic diagram of the device of the present embodiment 1, and the device includes a desulfurization tower 1. The middle and lower part of the desulfurization tower 1 is provided with a flue gas inlet 23 and the top is provided with a flue gas outlet 10 . An over-temperature emergency cooling device 24 is arranged above the flue gas inlet 23 to solve the occurrence of flue gas temperature over-temperature after the bypass flue is cancelled. When the temperature exceeds the limit temperature of 180°C, the slurry in the upper part of the slurry circulation tank 11 is sent to the accident area determined by the over-temperature emergency cooling device 24 through the circulation pump 15 of the over-temperature emergency cooling device 24 for emergency cooling of the desulfurization tower 1. An evaporative concentration spray layer 3 is arranged above the overtemperature emergency cooling device 24, and a liquid accumulator 4 is arranged above the evapor...

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Abstract

The invention discloses a device and method for producing magnesium sulfite by flue gas desulfurization. The device comprises a flue gas desulfurization device, a slurry circulating pool, a circulating settling tank and the like. The device and method are especially suitable for removing sulfur dioxide in coal burning boiler flue gas and other types of flue gas with low oxygen content, and can generate magnesium sulfite. By adopting the combination mode of multistage absorption, circulating settling and settling tank cooling crystallization, the device and method ensure the desulfurization efficiency and byproduct quality on the premise of thoroughly eliminating the electric power consumption and steam consumption of the oxidation blower, greatly lower the operating cost of the coproduct production system, and reduce the desulfurization operating cost.

Description

technical field [0001] The invention relates to a device and method for producing magnesium sulfite by flue gas desulfurization, in particular to a device and method for producing magnesium sulfite by direct crystallization in a waste liquid tower of desulfurization by magnesium oxide method. The device and method of the invention are especially suitable for direct production of magnesium sulfite by utilizing the flue gas desulfurization slurry of coal-fired boilers. Background technique [0002] Magnesium oxide flue gas desulfurization technology has been gradually promoted and applied in the coal-fired boiler flue gas treatment market. The market share has increased from less than 1% in 2005 to more than 6% at present. The wet magnesium oxide desulfurization technology has gained more and more people recognition. Using the magnesium oxide desulfurization process and preparing desulfurization waste liquid to produce magnesium sulfate products solves the problem of desulfur...

Claims

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Application Information

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IPC IPC(8): C01F5/42
CPCC01F5/42
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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