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Double-tower ammonia method desulfuration device and process

An ammonia desulfurization and desulfurization absorption tower technology, applied in the field of environmental protection equipment, can solve the problems of low oxidation efficiency, slow oxidation reaction speed, and uneven oxygen concentration, and achieve the effects of high absorption efficiency, reduced decomposition, and simple process.

Active Publication Date: 2013-04-17
SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCI & TECH
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Problems solved by technology

[0007] In view of the shortcomings of the existing ammonia desulfurization device, the oxidation reaction speed in the oxidation communication device is slow, the oxygen concentration is uneven, and the oxidation efficiency is low. The purpose of the present invention is to provide a double-tower ammonia desulfurization device

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  • Double-tower ammonia method desulfuration device and process

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Embodiment

[0050] Examples are as follows: the flue gas from the boiler temperature of 120 ° C is 100 × 10 4 N m 3 / h, SO in flue gas 2 The concentration is 2000ppm. After the flue gas enters the desulfurization absorption tower, it contacts with the absorption liquid, begins to cool down, and a part of the reaction occurs; the flue gas rises further, enters the spray absorption section of the upper section from the cooling and concentration section, and the flue gas temperature in the spray absorption section When the temperature drops to about 60℃~70℃, it reacts with ammonium sulfite in the absorption liquid to generate ammonium bisulfite; the flue gas further rises through the first-level spray layer and continues to react, and the SO in the flue gas 2 Further removal; when passing through the second spray layer, the SO in the flue gas 2 The removal rate has basically reached the design requirements; the flue gas continues to pass through the packing layer and the demisting area, an...

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Abstract

The invention discloses a double-tower ammonia method desulfuration device which comprises a desulfuration absorption tower, a concentration pump arranged at the bottom of the desulfuration absorption tower and a crystallization pump, wherein the interior of the desulfuration absorption tower is divided into a spraying absorption section for spraying ammonium-containing absorption liquid and a cooling concentration section for cooling an ammonium sulfate solution; the desulfuration device also comprises an oxidation power for oxidizing and concentrating an ammonium sulfite solution into the ammonium sulfate solution; the oxidization tower is connected with the desulfuration absorption tower through a pipeline; a spraying layer is arranged in the spray absorption section in the desulfuration absorption tower; and the oxidation tower is connected with the spraying layer of the desulfuration absorption tower through a primary circulation pump and a secondary circulation pump. The invention also discloses a double-tower ammonia method desulfuration process which has the characteristics of simple flow, high desulfuration ratio, stability of operation, convenience of overhauling and less investment. With the desulfuration absorption tower and the oxidization tower as core devices, the desulfuration device has the advantages of composite multifunction, high absorption efficiency and combined high-efficiency operation of oxidization, concentration and crystallization.

Description

technical field [0001] The invention belongs to the technical field of environmental protection equipment, relates to the technical field of flue gas desulfurization in the fields of coal-fired thermal power, coal-fired boilers, iron and steel sintering machines, nonferrous metallurgy and chemical building materials, and in particular relates to a method for removing sulfur dioxide in flue gas and A double-tower ammonia method desulfurization device for recovery and treatment and a desulfurization process using the device. Background technique [0002] With the rapid development of my country's industrialization and economic construction, SO in industrial flue gas 2 The pollution problem in China is becoming more and more serious, causing serious acid rain hazards. Although after the large-scale flue gas desulfurization project construction during the "Eleventh Five-Year Plan" period, my country's flue gas desulfurization capacity and installed capacity have jumped to the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78
Inventor 刘静高继贤何慕春傅月梅翟尚鹏唐夕山
Owner SHANGHAI CLEAR ENVIRONMENTAL PROTECTION SCI & TECH
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