Fume purification system with tower box

A flue gas purification system and flue gas technology, applied in the direction of inorganic chemistry, nitrogen compounds, air quality improvement, etc., can solve the problems of low value of by-products, high value of by-products, high operating costs, etc., to achieve low resource and energy consumption, flow Smooth, stable and reliable results

Active Publication Date: 2014-08-06
JIANGSU TANDGE ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of Wet-FGD+SCR combined desulfurization and denitrification, which require large investment, high operating costs, high consumption of ammonia, and low value of by-products, this application proposes a tower box flue gas purification system, which has a reasonable design and achieves dust removal , Simultaneous desulfurization and denitrification and recovery of NOx, the system has less investment, stable and reliable operation, less resource and energy consumption, and high value of by-products

Method used

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  • Fume purification system with tower box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Such as figure 1 As shown, a tower box flue gas purification system is a tower box structure formed by arranging absorption boxes vertically, constructing an analytical gas space separated from the flue gas channel, and using an alkaline absorbent to absorb flue gas in the absorption box Medium SO 2 and NOx, according to the principle of dynamic absorption and analysis of NOx by alkaline absorbents, then the analyzed NOx is sent to the NOx recovery system for recovery, and the liquid phase in the absorption box absorbs SO 2 The final product is mainly sulfite, which is directly sent out of the absorption system and leaves a large space for flue gas purification; including interconnected flue gas input system, flue gas dust removal and concentration system, flue gas absorption system, flue gas removal The mist system and the purified flue gas output system also include the absorbent adding system connected to the flue gas absorption system, the absorption slurry spray s...

Embodiment 2

[0105] Such as figure 1 As shown, a box-type flue gas purification system, its equipment settings and implementation steps are the same as in Example 1, except for the following settings and steps:

[0106] Take the combination of five absorption boxes, the lye adopts sodium carbonate, and the concentration is 20%.

[0107] Applying the box-type flue gas purification system of this application, the desulfurization efficiency is 99.6%, the denitrification efficiency is 93.5%, and the NOx recovery rate is 93.0%.

Embodiment 3

[0109] Such as figure 1 As shown, a box-type flue gas purification system, its equipment settings and implementation steps are the same as in Example 1, except for the following settings and steps:

[0110] Four absorption boxes are combined in series; the lye is sodium hydroxide with a concentration of 20%.

[0111] Applying the box-type flue gas purification system of this application, the desulfurization efficiency is 99.5%, the denitrification efficiency is 92.7%, and the NOx recovery rate is 92.2%.

[0112] The beneficial effects of the present invention are: (1) the absorption box is vertically combined to form a tower box structure, the combination is convenient, and the equipment is easy to manufacture, transport and install; (2) most of the dust in the flue gas is removed before entering the tower box, Make the absorption slurry pump suitable for the liquid phase pump, so that the flow of the liquid phase is smooth, so as to ensure the desulfurization and denitrifica...

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Abstract

The invention provides a fume purification system with a tower box, belonging to the technical field of fume treatment and environmental equipment. According to the fume purification system, absorbing boxes are longitudinally arranged so as to form a tower box structure; a gas resolving space separated from a fume passage is constructed; an alkaline absorbant is used for absorbing SO2 and NOx in fume in the absorbing box; according to the theory that the alkaline absorbent dynamically absorbs and resolves NOx, then the resolved NOx is conveyed to an NOx recovery system so as to be recovered, products generated by liquid phases in the absorbing boxes absorbing SO2 are mainly sulfites which are directly discharged out from an absorbing system, and a larger usable space is left. The fume purification system has the beneficial effects (1) the absorbing tanks are longitudinally combined to form a tower box structure, so that convenience in combination is achieved; (2) absorbing slurry pumps are applicable to liquid-phase pumps, and the liquid phase flows smoothly; (3) the fume and absorbing slurry in the absorbing box at each level are in cross-flow contact, but an overall countercurrent contact structure is formed; (4) the desulfurization rate is greater than or equal to 99%, the denitration rate is greater than or equal to 90%, the NOx recovery rate is greater than or equal to 90%, and the pure value of byproducts is high.

Description

[0001] The application belongs to the technical field of flue gas treatment and environmental equipment. The invention relates to a tower box flue gas purification system, more specifically, it is a tower box structure formed by vertically arranging absorption boxes, constructing an analytical gas space separated from the flue gas channel, and using alkaline absorbent to absorb Absorb SO in the flue gas in the box 2 and NOx, according to the principle of dynamic absorption and analysis of NOx by alkaline absorbents, and then the analyzed NOx is sent to the NOx recovery system for recovery, and the liquid phase in the absorption box absorbs SO 2 The final product is mainly sulfite, which is directly sent out to the absorption system, leaving a large space for the flue gas purification system. Background technique [0002] The current flue gas desulfurization and denitrification mainly adopts "wet-FGD" and NH 3 Selective Catalytic Reduction (SCR) technology denitrification, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60B01D53/96B01D50/00C01B17/62C01B21/20
CPCY02A50/20Y02P20/151
Inventor 陶俊陶陶徐继红
Owner JIANGSU TANDGE ENVIRONMENTAL ENG
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