Additive for improving performance of calcium-based desulfurizer and application thereof

A desulfurization agent and additive technology, applied in the field of desulfurization, can solve the problems of low sulfur capacity, low desulfurization efficiency, and low Ca utilization rate, and achieve the effects of increasing specific surface area, improving desulfurization efficiency, and enhancing capture capacity

Pending Publication Date: 2022-04-29
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to CaO, Ca(OH) 2 The price of calcium base is low and the source is wide. The dry desulfurizers on the market are generally calcium-based desulfurizers, which have problems such as low sulfur capacity, low Ca utilization rate, and low desulfurization efficiency.
At present, more stringent environmental protection standards have been introduced successively ac

Method used

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  • Additive for improving performance of calcium-based desulfurizer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] The desulfurization performance of the desulfurizer was evaluated by using a suspension reactor in the laboratory: the feeding amount of the desulfurizer was 1 g, SO 2 The initial concentration of 250mg / m 3 , using unmodified Ca(OH) 2 , the flue gas concentration at the outlet of the reactor was detected as 180mg / m 3 , cannot meet ultra-low emission standards.

Example Embodiment

[0036] Example 2

[0037] Additives were prepared in the following mass ratios: TiO 2 :Ce(NO 3 ) 2 :V 2 O 5 =1:1:1, CO(NH 2 ) 2 :NaHCO 3 =4:1, catalytic component:active component:dispersant=36:15:22.

[0038] The desulfurization performance of the desulfurizer was evaluated by using a suspension reactor in the laboratory: the feeding amount of the desulfurizer was 1 g, SO 2 The initial concentration of 250mg / m 3 , the above additives are added with Ca(OH) according to the mass ratio of 5% 2 , mixed with additive-modified Ca(OH) 2 , the flue gas concentration at the outlet of the reactor was detected as 48mg / m 3 , which can meet emission standards.

Example Embodiment

[0039] Example 3

[0040] Additives were prepared in the following mass ratios: TiO 2 :Ce(NO 3 ) 2 :V 2 O 5 =1:1:1, CO(NH 2 ) 2 :NaHCO 3 =4:1, catalytic component:active component:dispersant=36:15:22.

[0041] The desulfurization performance of the desulfurizer was evaluated by using a suspension reactor in the laboratory: the feeding amount of the desulfurizer was 1 g, SO 2 The initial concentration of 250mg / m 3 , the above additives are added with Ca(OH) according to the mass ratio of 10% 2 , mixed with additive-modified Ca(OH) 2 , the flue gas concentration at the outlet of the reactor was detected as 40mg / m 3 , can meet the over-discharge standard.

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Abstract

The invention relates to an additive for improving the performance of a calcium-based desulfurizing agent and application of the additive. The additive is prepared from the following raw materials in parts by weight: 10 to 27 parts of a catalytic component, 45 to 77 parts of an active component and 0 to 27 parts of a dispersing agent, wherein; the catalytic component is one or a mixture of more of TiO2, Ce (NO3) 2 and V2O5; the active component is CO (NH2) 2 and/or NaHCO3. The calcium-based desulfurizing agent is Ca (OH) 2, and the addition amount of the additive in the calcium-based desulfurizing agent is 5-20wt% of the calcium-based desulfurizing agent. The desulfurization efficiency can be increased by increasing the total amount of the active component, the catalytic component and the dispersing agent in the additive, and for improving the efficiency of the desulfurizing agent, the active component is larger than the catalytic component and the dispersing agent is larger than the catalytic component; the additive can realize efficient and rapid removal of SO2, and the desulfurization performance is improved.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to an additive for improving the performance of a calcium-based desulfurizer and its application. Background technique [0002] Desulfurization technology can be divided into wet, semi-dry and dry desulfurization technologies according to the state characteristics of the desulfurizer. Typical wet desulfurization technologies such as limestone-gypsum method and ammonia absorption method have a series of problems such as serious equipment corrosion and low utilization rate of by-products. Typical semi-dry technologies such as flue gas circulating fluidized bed method, spray drying method, etc. have low utilization rate of by-products and are not suitable for treating SO 2 High concentration of industrial smoke. The dry desulfurization technology is different from the wet technology. It achieves desulfurization through the physical and chemical reactions between t...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/50
CPCB01D53/8609B01D2255/20707B01D2255/2065B01D2255/20723B01D2251/2067B01D2251/304B01D2251/404B01D2251/604
Inventor 李帅帅刘瑞芝赵琳彭学平赵亮赵艳妍
Owner TIANJIN CEMENT IND DESIGN & RES INST
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