Energy-saving and consumption-reducing magnesium oxide flue gas desulfurization process and device

A desulfurization process, magnesium oxide technology, applied in the field of flue gas desulfurization, can solve problems such as high energy consumption, increased floor space of pre-scrubber, and restrictions on the development of flue gas desulfurization technology by magnesium oxide method

Inactive Publication Date: 2011-01-19
山西晋丰节能环保工程设计有限公司 +1
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Problems solved by technology

However, there are still some problems in the traditional magnesium flue gas desulfurization process, such as (1) the installation of the pre-scrubber increases the floor area; Further development of magnesium oxide flue gas desulfurization technology

Method used

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  • Energy-saving and consumption-reducing magnesium oxide flue gas desulfurization process and device
  • Energy-saving and consumption-reducing magnesium oxide flue gas desulfurization process and device

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Embodiment Construction

[0010] to combine figure 1 The specific embodiment of the present invention will be introduced in detail.

[0011] Such as figure 1 As shown, the high-temperature flue gas at 120-150°C after dedusting enters the absorption tower (1), and a cooling spray layer (3) is installed on the upper part of the inlet flue to cool and spray the incoming high-temperature flue gas to make the flue gas The temperature drops to 60-90°C, and the cooled hot flue gas enters the spray absorption layer (4). There are 2 to 3 spray layers in the absorption section, and the spray absorption liquid and the hot flue gas are contacted and washed in countercurrent to complete the process. SO 2 the absorption process. The absorption liquid is collected into the oxidation tank (2) at the bottom of the absorption tower (1), and the solution in the oxidation tank is oxidized by the aeration device (17) and the oxidation fan (7) to convert magnesium sulfite into magnesium sulfate. The cleaner flue gas aft...

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Abstract

The invention discloses an energy-saving and consumption-reducing magnesium oxide flue gas desulfurization process and an energy-saving and consumption-reducing magnesium oxide flue gas desulfurization device. The device consists of an absorbing tower, a neutralizing tank, a concentration and sedimentation tank, a centrifugal separator and a middle tank, and is characterized in that flue gas directly enters the absorbing tower without passing through a pre-washing tower; a cooling spray layer is arranged in the absorbing tower to cool down the entered flue gas, so that area occupied is reduced; a filtering and slag removing device is arranged behind an extraction pump, so that purity of magnesium sulfide serving as a byproduct is improved; the neutralizing tank is provided with a magnesium hydroxide feed port; and supernatant of the concentration and sedimentation tank and dilute solution separated by the centrifugal separator are used as absorption liquid to newly enter the absorbing tower after passing through the middle tank. The entire desulfurization system has the advantages of simple process, no secondary pollution, low energy consumption and small occupied area and is particularly suitable for enterprises with magnesium oxide resources and small reserved lands.

Description

technical field [0001] The patent of the present invention belongs to the technical field of flue gas desulfurization, and specifically relates to an energy-saving and consumption-reducing magnesium oxide flue gas desulfurization process and device. Background technique [0002] my country is the world's largest coal producer and consumer, and coal-fired flue gas has also become a source of SO in my country. 2 main source of emissions. A large number of coal-fired and gas-fired industrial boilers, thermal power plants, and industrial furnaces are facing desulfurization problems. At present, the main desulfurization methods are dry, semi-dry, and wet flue gas desulfurization processes. The wet flue gas desulfurization process has occupied most of the desulfurization market due to its high desulfurization efficiency. my country is rich in magnesium oxide resources, the reserves account for more than 90% of the world's total. Therefore, my country's flue gas desulfurization c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50C01F5/40
CPCY02P20/10
Inventor 李鹏举李俊平张卫东李丽红陈洁冯宇飞
Owner 山西晋丰节能环保工程设计有限公司
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