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A sintering flue gas desulfurization and denitrification purification system and process

A desulfurization, denitrification, and purification system technology, applied in the field of flue gas purification, can solve problems such as low economic benefits, high energy consumption, and substandard emissions

Active Publication Date: 2021-04-20
云南天朗环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the purification process is to spray and pre-wash the flue gas in the pre-washing tower, and then enter the desulfurization tower for further reaction treatment; due to the strict new local and national environmental protection regulations, the existing desulfurization and denitrification devices for flue gas processing have low desulfurization efficiency. The problem is that the discharge is often not up to the standard, and the energy consumption is large, and the economic benefit is low

Method used

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  • A sintering flue gas desulfurization and denitrification purification system and process
  • A sintering flue gas desulfurization and denitrification purification system and process
  • A sintering flue gas desulfurization and denitrification purification system and process

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Embodiment 1

[0098] In the process of sintering flue gas desulfurization and denitration purification system, ozone is first introduced into the flue gas, and the nitric oxide in the flue gas reacts with ozone to oxidize nitric oxide into high-value nitrogen oxides; then the flue gas is sprayed Pre-wash, and then reduce the flue gas temperature to 60 °C; after pre-washing, the flue gas and ammonia water are subjected to absorption reaction to remove sulfur dioxide in the flue gas to obtain an intermediate product ammonium sulfite solution; After whitening, it is discharged to the atmosphere; the intermediate product ammonium sulfite solution is oxidized with compressed air, and the ammonium sulfite aqueous solution is oxidized into an ammonium sulfate solution; the ammonium sulfate solution is heated and concentrated to a saturated ammonium sulfate slurry with a solid content of 15%; Then, the saturated ammonium sulfate slurry is subjected to evaporative crystallization treatment, cyclone t...

Embodiment 2

[0100] In the process of sintering flue gas desulfurization and denitration purification system, ozone is first introduced into the flue gas, and the nitric oxide in the flue gas reacts with ozone to oxidize nitric oxide into high-value nitrogen oxides; then the flue gas is sprayed Pre-wash, and then reduce the flue gas temperature to 70 °C; after pre-washing, the flue gas is absorbed and reacted with ammonia water to remove the sulfur dioxide in the flue gas to obtain an intermediate product ammonium sulfite solution; After whitening, it is discharged to the atmosphere; the intermediate product ammonium sulfite solution is oxidized with compressed air, and the ammonium sulfite aqueous solution is oxidized into an ammonium sulfate solution; the ammonium sulfate solution is heated and concentrated to a saturated ammonium sulfate slurry with a solid content of 20%; Then, the saturated ammonium sulfate slurry is subjected to evaporative crystallization treatment, cyclone treatment...

Embodiment 3

[0102] In the process of sintering flue gas desulfurization and denitration purification system, ozone is first introduced into the flue gas, and the nitric oxide in the flue gas reacts with ozone to oxidize nitric oxide into high-value nitrogen oxides; then the flue gas is sprayed Pre-wash, and then reduce the flue gas temperature to 65 °C; after pre-washing, the flue gas is absorbed and reacted with ammonia water to remove the sulfur dioxide in the flue gas to obtain an intermediate product ammonium sulfite solution; After whitening, it is discharged to the atmosphere; the intermediate product ammonium sulfite solution is oxidized with compressed air, and the ammonium sulfite aqueous solution is oxidized into an ammonium sulfate solution; the ammonium sulfate solution is heated and concentrated to a saturated ammonium sulfate slurry with a solid content of 17%; Then, the saturated ammonium sulfate slurry is subjected to evaporative crystallization treatment, cyclone treatment...

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Abstract

The invention discloses a sintering flue gas desulfurization and denitrification purification system, which includes a pre-washing tower, a desulfurization tower, a denitrification device, and a clean flue gas whitening device; the system of the invention has the advantages of high efficiency in desulfurization and denitrification; After treatment, it can be directly discharged into the atmosphere to meet the needs of environmentally friendly production. The invention also discloses a process of sintering flue gas desulfurization and denitrification purification system, including ozone reaction process, absorption reaction process, oxidation reaction process, smoke demisting, whitening, and by-product processing; denitrification, and then use ammonia water and compressed air to carry out absorption and oxidation reactions respectively. While desulfurizing the flue gas, the by-product ammonium sulfate solution can be obtained; and the flue gas can be directly discharged into the atmosphere after further demisting and whitening, meeting the requirements of Standard discharge; and by-product ammonium sulfate solution can be further processed to obtain product ammonium sulfate, increasing economic benefits.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and particularly relates to a sintering flue gas desulfurization and denitration purification system and process. Background technique [0002] In order to meet the environmental protection requirements, the flue gas discharged from the sintering machine needs to be desulfurized and purified. Usually, the purification process is to spray and pre-wash the flue gas in the pre-wash tower, and then enter the desulfurization tower for further reaction treatment; due to the strict new local and national environmental protection regulations, the existing desulfurization and denitrification devices for flue gas treatment have insufficient desulfurization efficiency. The emission is often not up to the standard, and the energy consumption is large, and the economic benefit is low. Therefore, it is very necessary to develop a sintering flue gas desulfurization and denitrification purificatio...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/76B01D53/78B01D53/73B01D53/56B01D53/50C01C1/24
CPCB01D53/502B01D53/56B01D53/73B01D53/75B01D53/76B01D53/78C01C1/24
Inventor 李堰李跃春王继能聂景璐旃秋霞李明刘缘缘史花丽
Owner 云南天朗环境科技有限公司
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