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Magnesium sulfate production device and method by flue gas desulfurization

A magnesium sulfate and flue gas technology, applied in the direction of magnesium sulfate, etc., can solve the problems of high production cost per ton of ore, high desulfurization operation cost, and high steam consumption of magnesium sulfate, so as to reduce operating costs, ensure desulfurization efficiency and by-product quality, Effect of reducing steam consumption

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

Adopting the device and method provided by the present invention can solve the problems that the production of magnesium sulfate from waste liquid after magnesium desulfurization consumes more steam, the production cost per ton of ore is higher, and the desulfurization operation cost is increased more.

Method used

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  • Magnesium sulfate production device and method by flue gas desulfurization
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  • Magnesium sulfate production device and method by flue gas desulfurization

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Embodiment 1

[0068] 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 180, 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 evaporative...

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Abstract

The invention a magnesium sulfate production device and method by flue gas desulfurization, particularly a device and method for producing magnesium sulfate by direct crystallization in a magnesium-oxide-process desulfurization waste liquid tower. The device comprises a flue gas desulfurization apparatus, a slurry circulating tank, an evaporative concentration region, a circulating settling apparatus, a crystallizing apparatus, a centrifugal apparatus, a drying apparatus and the like. The device and method provided by the invention can solve the problems of high steam consumption, higher production cost per ton of ores, and higher desulfurization operating cost when the magnesium-process desulfurization waste liquid is used for producing magnesium sulfate at present.

Description

technical field [0001] The invention relates to a device and method for producing magnesium sulfate by flue gas desulfurization, in particular to a device and method for producing magnesium sulfate by direct crystallization in a waste liquid tower of desulfurization by magnesium oxide method. The device and method of the present invention are especially suitable for preparing magnesium sulfate by using waste slurry after flue gas desulfurization of sintering machines, pellets, rotary kilns and the like. Background technique [0002] Magnesium oxide flue gas desulfurization technology has gradually been popularized and applied, and the market share has risen from less than 1% in 2005 to over 6% at present. Wet magnesium oxide method desulfurization technology has been recognized by more and more people. Using magnesium oxide desulfurization process and preparing desulfurization waste liquid to generate magnesium sulfate by-product not only solves the problem of desulfurizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/40
CPCC01F5/40
Inventor 童裳慧
Owner ZHONGJING ENVIRONMENTAL TECH CO LTD
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