Single-tower desulfurization ultra-clean treatment system and desulfurization process

A technology of treatment system and desulfurization process, which is applied in the field of single-tower desulfurization ultra-clean treatment system and desulfurization process, can solve the problems of substandard desulfurization, high cost and low efficiency of single-tower desulfurization and desulfurization, and achieve better desulfurization effect and dust removal effect Good effect with few changes

Pending Publication Date: 2021-04-20
武汉立为工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a single-tower desulfurization ultra-clean treatment system and desulfurization process to solve the problems of high cost, low efficiency and substandard desulfurization in single-tower desulfurization and desulfurization in the prior art

Method used

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  • Single-tower desulfurization ultra-clean treatment system and desulfurization process

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A single tower desulfurization ultra-clean treatment process, comprising the following steps:

[0051] 1) The desulfurization liquid in the pre-spray circulation box 102 is sent to the pre-spray layer 104 through the pre-spray circulation pump 101, and the flue gas entering the flue 103 is subjected to pre-spray desulfurization; the liquid controlled by the pre-spray layer 104 The gas ratio is 0.5L / Nm 3 ;

[0052] 2) Control the induced draft fan and then control the flue gas after pre-spraying to enter the absorption tower 201 at a speed of 12m / s. At this time, the flue gas temperature at the inlet of the desulfurization tower is detected to be 105°C, and the average flow velocity of the flue gas in the absorption tower is controlled to be 3m / s, the slurry circulating pump 204 sends the desulfurization liquid in the absorption tower 201 to the spray layer 203 to spray and desulfurize the flue gas. The center line of the sprinkler pipe on the top floor of the device ...

Embodiment 2

[0055] The desulfurization treatment process steps are the same as in Example 1, and the liquid-gas ratio during pre-spraying is 0.3L / Nm 3 , control the induced draft fan and then control the flow rate of the flue gas entering the desulfurization tower to be 15m / s, and the temperature of the flue gas at the inlet of the desulfurization tower is 155°C; the average flow rate of the flue gas in the absorption tower is 4m / s, and other conditions remain unchanged. The gas is discharged from the flue gas outlet, and the SO2 at the outlet of the desulfurization tower is detected 2 The concentration value is 31mg / Nm 3 , the particle concentration value is 4.1mg / Nm 3 .

Embodiment 3

[0057] The desulfurization treatment process steps are the same as in Example 1, and the liquid-gas ratio during pre-spraying is 0.2L / Nm 3 , control the induced draft fan and then control the flow rate of the flue gas entering the desulfurization tower to be 15m / s, and the temperature of the flue gas at the inlet of the desulfurization tower is 180°C; the average flow rate of the flue gas in the absorption tower is 4m / s, and other conditions remain unchanged. The gas is discharged from the flue gas outlet, and the SO2 at the outlet of the desulfurization tower is detected 2 The concentration value is 35mg / Nm 3 , the particle concentration value is 4.3mg / Nm 3 .

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Abstract

The invention relates to the technical field of flue gas desulfurization, and discloses a single-tower desulfurization ultra-clean treatment system and a desulfurization process, the single-tower desulfurization ultra-clean treatment system comprises a pre-absorption device and a desulfurization tower, and the pre-absorption device adopts spraying to pre-absorb flue gas; an absorption tower, a turbulent flow synergistic plate, a spraying layer, a slurry circulating pump, a synergistic dust removal device and a demister are sequentially arranged in the desulfurization tower from bottom to top; and the pre-absorbed flue gas enters the desulfurization tower through an absorption tower to finally finish desulfurization ultra-clean treatment. According to the invention, 20-30% of SO2 is captured after the flue gas is pre-absorbed and washed, and the reduction of the temperature and the concentration is more beneficial to the absorption of the subsequent absorption tower; and in addition, due to the design of the turbulent flow synergistic plate and the synergistic dust removal device, the desulfurization efficiency and desulfurization capacity are further improved. The system can meet the emission requirements that the SO2 concentration value at the outlet of the absorption tower is lower than 35mg/Nm < 3 > and the particulate matter concentration value is lower than 5mg/Nm < 3 > under the condition that the SO2 concentration at the inlet of the single-tower absorption tower is less than or equal to 6200mg/Nm < 3 >.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to a single-tower desulfurization ultra-clean treatment system and a desulfurization process. Background technique [0002] At present, the flue gas desulfurization treatment of more than 90% of domestic coal-fired units adopts the limestone / lime-gypsum wet desulfurization process. 2 Has a high removal efficiency. With the improvement of efficiency and the control of enterprise operating costs, the source of coal quality has changed too much. The domestic requirements for flue gas emissions are all controlled by ultra-clean indicators (SO 2 ≤35mg / Nm 3 , Dust≤10mg / Nm 3 ), thus greatly limiting the single-tower treatment efficiency, at the inlet SO 2 The emission concentration exceeds 4000mg / Nm 3 Under certain conditions, most enterprises adopt the process route of double towers and double cycles, but there are disadvantages such as large floor area, large invest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/78B01D53/80B01D53/50B01D47/06B01D50/00B01D53/96
Inventor 梅晟东侯奎邱健任晓佳
Owner 武汉立为工程技术有限公司
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