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Process for removing SO2 in smoke from boiler of coking plant by utilizing residual coked ammonia water

A technology for coking residual ammonia water and boiler flue gas, which is applied in the direction of chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of waste slag discarding secondary pollution, affecting brick quality, and poor gypsum sales market, etc., and achieve reduction Secondary pollution, wide application range, and the effect of realizing circular economy

Active Publication Date: 2011-06-22
内蒙古庆华集团乌斯太能源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slag and fly ash affect the quality of bricks and cannot be completely used up, and there is a problem of secondary pollution caused by waste slag discarding
2. The sales market of gypsum produced by limestone-gypsum method is not good, and there are two kinds of pollution

Method used

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  • Process for removing SO2 in smoke from boiler of coking plant by utilizing residual coked ammonia water
  • Process for removing SO2 in smoke from boiler of coking plant by utilizing residual coked ammonia water

Examples

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Effect test

Embodiment 1

[0017] Example 1: A method for removing SO in coking plant boiler flue gas with coking residual ammonia water 2 The process comprises the following steps: (1) remaining ammonia water heat exchange; (2) ammonia distillation tower; (3) ammonia vapor concentration and condensation; (4) ammonia distillation waste water treatment; (5) concentrated ammonia water dilution; (6) ) absorption tower desulfurization; (7) cyclone thick separation; (8) drying and packaging; wherein,

[0018] (1) Heat exchange with residual ammonia water: the residual ammonia water sent from the condensation blasting section of the coking plant is filtered through an ammonia water filter to remove impurities such as entrained tar and mixed with 40% by mass sodium hydroxide aqueous solution from the lye circulating pump Dilute ammonia lye is obtained, and the dilute ammonia lye is exchanged with the ammonia distillation waste water discharged from the bottom of the ammonia distillation tower in a heat exchang...

Embodiment 2

[0026] Example 2: A method for removing SO in coking plant boiler flue gas with coking residual ammonia water 2 The process comprises the following steps: (1) remaining ammonia water heat exchange; (2) ammonia distillation tower; (3) ammonia vapor concentration and condensation; (4) ammonia distillation waste water treatment; (5) concentrated ammonia water dilution; (6) ) absorption tower desulfurization; (7) cyclone thick separation; (8) drying and packaging; wherein,

[0027] (1) Heat exchange with residual ammonia water: the residual ammonia water sent from the condensing and blowing section of the coking plant is filtered through an ammonia water filter to remove impurities such as entrained tar and mixed with a 35% sodium hydroxide aqueous solution with a mass percentage of lye circulating pump Dilute ammonia lye is obtained, and the dilute ammonia lye is exchanged with the ammonia distillation wastewater discharged from the bottom of the ammonia distillation tower in a h...

Embodiment 3

[0035] Example 3: A method for removing SO in coking plant boiler flue gas with coking residual ammonia water 2 The process comprises the following steps: (1) remaining ammonia water heat exchange; (2) ammonia distillation tower; (3) ammonia vapor concentration and condensation; (4) ammonia distillation waste water treatment; (5) concentrated ammonia water dilution; (6) ) absorption tower desulfurization; (7) cyclone thick separation; (8) drying and packaging; wherein,

[0036] (1) Heat exchange with residual ammonia water: the residual ammonia water sent from the condensing and blowing section of the coking plant is filtered through the ammonia water filter to remove impurities such as entrained tar and mixed with 38% sodium hydroxide aqueous solution by mass percentage from the lye circulating pump Dilute ammonia lye is obtained, and the dilute ammonia lye exchanges heat with the ammonia distillation waste water discharged from the bottom of the ammonia distillation tower in...

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Abstract

The invention discloses a process for removing SO2 in smoke from a boiler of a coking plant by utilizing residual coked ammonia water, and the process comprises the following steps: (1) heat exchange of the residual ammonia water; (2) ammonia evaporation in an ammonia evaporation tower; (3) concentration and condensation of ammonia vapor; (4) ammonia evaporation and waste water treatment; (5) stronger ammonia water dilution; (6) desulfuration in an absorption tower; (7) thick separation in a swirler; and (8) drying, warehousing and packaging. According to the invention, the residual coked ammonia water is fully utilized, so that the wet ammonia flue gas desulfurization can be realized, thus the purposes of treating waste by waste, saving energy, reducing emission, reducing secondary pollution and realizing recycling economy can be achieved; and meanwhile, the procurement cost of sulfuric acid for treating the waste ammonia water of the coking plant can be reduced.

Description

technical field [0001] The invention relates to a method for removing SO from boiler flue gas in a coking plant 2 The process, especially involving a kind of residual ammonia water discharged from the coking plant, using the coking residual ammonia water to remove SO in the boiler flue gas of the coking plant 2 craft. Background technique [0002] Boiler flue gas desulfurization is a key project of the national environmental governance work, and it is a problem that every thermal power plant and chemical plant must solve. According to control SO 2 According to the position of the emission process in the coal combustion process, the desulfurization technology can be divided into three types: pre-combustion, combustion and post-combustion. Desulfurization in combustion is dry desulfurization, mainly calcium spraying method in the furnace, and the process represented by circulating fluidized bed desulfurization has been developed rapidly; desulfurization after combustion ref...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/78
Inventor 陈学伟胡凤山连作桦张振兵李长生
Owner 内蒙古庆华集团乌斯太能源化工有限公司
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