Composite denitration agent and preparation method thereof

A technology of denitrification agent and oxidant, applied in the field of denitrification, can solve the problems of high production cost of denitrification agent, unsatisfactory denitrification effect, poor thermal stability, etc., and achieve high thermal stability, simple and easy-to-control preparation method, and high thermal stability Effect

Active Publication Date: 2020-08-18
FOSHAN HUAQING ZHIYE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of denitration agents to denitrify flue gas is expected to fundamentally control the emission of nitrogen oxides, but the existing denitrification agents are mainly V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 series, where TiO 2 As a carrier, it accounts for a large proportion of denitration agent components, and the cost of titanium dioxide is relatively high, resulting in high production costs of denitration agents, and this type of denitration agent has high denitration activity, but its thermal stability is poor, and the denitration effect is not enough. Ideal, so it cannot meet actual needs

Method used

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  • Composite denitration agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 5Kg of iron oxide, 5Kg of lanthanum oxide, 5Kg of barium oxide and 5Kg of urea, mix them uniformly, and conduct an activation heat treatment at 200°C for 2 hours under a nitrogen atmosphere to obtain composition A; take 30Kg of talcum powder, 10Kg of layered silicate and 1Kg of permanganese Potassium oxide is placed in an appropriate amount of ethanol and water mixed solution (the volume ratio of ethanol and water is 1:1), and the pH is adjusted to 3.5 with acid to obtain composition B; 5Kg potassium oxide, 2Kg organic viscose are added to the mixer Binder, 5Kg inorganic binder, 1Kg carboxymethyl cellulose, 0.5Kg surfactant, 1Kg dispersant and 0.1Kg glycerin are stirred while heating until the temperature rises to 80° C. to obtain composition C; A. Composition B and composition C are added to the mixer together, mixed with water to obtain mud; knead the mud, and then granulate or extrude; dry at 120°C for 3 hours, and then calcined at 300°C for 24 hours, The compou...

Embodiment 2

[0028] Take 10Kg of iron oxide, 10Kg of lanthanum oxide, 10Kg of barium oxide and 10Kg of urea, mix them uniformly, and conduct an activation heat treatment at 500°C for 3 hours under a nitrogen atmosphere to obtain composition A; take 80Kg of talcum powder, 20Kg of layered silicate and 5Kg of high manganese Potassium oxide is placed together in a mixed solution of an appropriate amount of ethanol and water (the volume ratio of ethanol and water is 1:1), and the pH is adjusted to 3.5 with acid to obtain composition B; 10Kg potassium oxide, 5Kg organic Binder, 20Kg inorganic binder, 5Kg carboxymethyl cellulose, 2Kg surface active agent, 10Kg dispersant and 10Kg glycerin, stir while heating, until temperature rises to 80 ℃, obtain composition C; Composition A , composition B, and composition C are put into a mixer together, mixed with water to obtain mud; knead the mud, and then granulate or extrude; dry at 200°C for 5h, and then calcined at 800°C for 72h to obtain Composite den...

Embodiment 3

[0030] Take 7Kg of iron oxide, 7Kg of lanthanum oxide, 7Kg of barium oxide and 7Kg of urea, mix them evenly, and conduct an activation heat treatment at 300°C for 2.5 hours under nitrogen atmosphere to obtain composition A; take 55Kg of talcum powder and 15Kg of layered silicate and 3Kg of Potassium manganate is placed together in a mixed solution of an appropriate amount of ethanol and water (the volume ratio of ethanol and water is 1:1), and the pH is adjusted to 3.5 with acid to obtain composition B; 7Kg potassium oxide, 3Kg Organic binder, 12Kg inorganic binder, 3Kg carboxymethyl cellulose, 1Kg surface active agent, 5Kg dispersant and 5Kg glycerin, stir while heating, until temperature rises to 80 ℃, obtain composition C; Composition A. Composition B and composition C are added to the mixer together, mixed with water to obtain mud; knead the mud, then granulate or extrude; dry at 160°C for 4 hours, and then calcined at 550°C for 48 hours, Obtain the finished compound denit...

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Abstract

The invention belongs to the technical field of denitration, and discloses a composite denitration agent which is mainly prepared from talcum powder, phyllosilicate, ferric oxide, lanthanum oxide, barium oxide, urea, an oxidizing agent, an organic binder, an inorganic binder, carboxymethyl cellulose, a surfactant, a dispersing agent, polyhydric alcohol and other raw materials. The talcum powder and the phyllosilicate are used as carriers of the denitration agent, so that the thermal stability of the denitration agent is higher than that of a denitration agent with TiO2 as a carrier at a high temperature; the potassium oxide is loaded on the carrier, so that the denitration efficiency of the denitration agent can be effectively improved; the ferric oxide, lanthanum oxide, barium oxide and urea are used as denitration active components, so that the compounding effect of the denitration active components is efficiently achieved, and a complex with stable performance is favorably formed; in addition, the organic binder and the inorganic binder are added at the same time, so that the active centers of the active components can be highly dispersed, structural collapse caused by calcination of the denitration agent is prevented, and the high activity and high thermal stability of the denitration agent are further guaranteed. The invention also provides a preparation method of the denitration agent.

Description

technical field [0001] The invention belongs to the technical field of denitrification, and in particular relates to a composite denitrification agent and a preparation method thereof. Background technique [0002] Soot, sulfur dioxide, nitrogen oxides (NO X ) and other harmful substances are the main causes of environmental problems such as air pollution, acid rain, and greenhouse effect. How to effectively remove SO in flue gas 2 and NO X It has attracted the attention of researchers all over the world. Among them, nitrogen oxides are currently one of the most important air pollutants, which mainly come from the waste gas produced by the combustion of coal, oil, and natural gas used in production and life, of which about 70% come from the direct combustion of coal, which is It is the main cause of acid rain, photochemical smog and the hole in the ozone layer, which has caused great harm to the ecological environment, industrial and agricultural production, and human hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/56
CPCB01D53/565B01D2258/0283Y02A50/20
Inventor 万杏波曾芳龚乐稳李伟江巩晋磊卢小聪
Owner FOSHAN HUAQING ZHIYE ENVIRONMENTAL PROTECTION TECH CO LTD
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