Catalyst for synergetic dioxin removal and denitration and preparation method thereof

A technology for removing dioxins and catalysts, which is applied in the field of flue gas removal of dioxins and denitration, can solve the problems of low denitration efficiency, inability to remove dioxins simultaneously and effectively, and easy to be poisoned, so as to achieve efficient removal and improve activity. and stability, prolonging the service life

Active Publication Date: 2020-02-11
上海瀚昱环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Traditional denitrification methods mainly include activated carbon method, oxidation method, ozone method, non-selective catalytic reduction SNCR method, selective catalytic reduction SCR method, etc., each has its own advantages and disadvantages, among which S

Method used

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  • Catalyst for synergetic dioxin removal and denitration and preparation method thereof
  • Catalyst for synergetic dioxin removal and denitration and preparation method thereof
  • Catalyst for synergetic dioxin removal and denitration and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] According to the preparation method of the catalyst for de-dioxin synergistic denitration provided by the present invention, the preparation method comprises the following steps:

[0028] Step 1. To 10-15 parts by weight of lanthanum salt, 5-8 parts by weight of strontium salt, 5-8 parts by weight of neodymium salt, 10-15 parts by weight of manganese salt, 5-8 parts by weight of chromium salt and 5 Add 18-25 parts by weight of water to 8 parts by weight of iron salt, heat to 40-60 ° C, stir until completely dissolved, then add 20-30 parts by weight of silicon oxide and 4-8 parts by weight of activated carbon powder, mix Evenly into the first mud;

[0029] Step 2, extruding the first mud material, drying at 20-60°C for 4-6 days, roasting at 500-550°C for 1 day, and then pulverizing to make porous powder;

[0030] Step 3, in 4-7 parts by weight of ammonium paramolybdate, 12-18 parts by weight of ammonium metavanadate, 2-5 parts by weight of cobalt salt, 1-3 parts by weig...

Example Embodiment

[0055] Example 1

[0056] The synergistic denitration catalyst for removing dioxins is prepared by the following components in parts by weight:

[0057]

[0058] Among them, the silicon oxide is nano-state silicon oxide, the size of nano-grain is 10-20nm, and the activated carbon powder is 2000 mesh powder;

[0059] Titanium dioxide is anatase type titanium dioxide, the size of nano-grain is 8-15nm, and the specific surface area is 90-120m 2 / g;

[0060] The composition of micro-carbon ferrochromium powder is C≤0.1%, Cr≥60%, Fe balance, and the particle size of the powder is 1500-2000 mesh;

[0061] The fiber diameter of the glass fiber is 3-5μm, the length is 1-3mm, and the dispersion degree is more than 90%;

[0062] The viscosity average molecular weights of P.E.O and CMC are 4,000,000 and 20,000, respectively.

[0063] Utilize the above-mentioned components to prepare the synergistic denitration catalyst for dioxin removal through the following steps:

[0064] (1) ...

Example Embodiment

[0070] Example 2

[0071] The synergistic denitration catalyst for removing dioxins is prepared by the following components in parts by weight:

[0072]

[0073]

[0074] Among them, the silicon oxide is nano-state silicon oxide, the size of nano-grain is 10-20nm, and the activated carbon powder is 2000 mesh powder;

[0075] Titanium dioxide is anatase type titanium dioxide, the size of nano-grain is 8-15nm, and the specific surface area is 90-120m 2 / g;

[0076] The composition of micro-carbon ferrochromium powder is C≤0.1%, Cr≥60%, Fe balance, and the particle size of the powder is 1500-2000 mesh;

[0077] The fiber diameter of the glass fiber is 3-5μm, the length is 1-3mm, and the dispersion degree is more than 90%;

[0078] The viscosity average molecular weights of P.E.O and CMC are 6,000,000 and 50,000, respectively.

[0079] Utilize the above-mentioned components to prepare the synergistic denitration catalyst for dioxin removal through the following steps:

...

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Abstract

The invention discloses a preparation method of a catalyst for synergetic dioxin removal and denitration. The preparation method comprises the following steps: water is added into a lanthanum salt, astrontium salt, a neodymium salt, a manganese salt, a chrome salt and an iron salt, heating is conducted to 40-60 DEG C, a mixture is stirred to be dissolved, then silicon oxide and activated carbon powder are added, and a mixture is mixed into a first muddy material; the first muddy material is subjected to extrusion molding, then dried at 20-60 DEG C, calcinated at 500-550 DEG C and then crushedinto porous powder; ammonium hydroxide is added into ammonium paramolybdate, ammonium metavanadate, a cobalt salt, an antimonic salt, a cerium salt and a europium salt to be sufficiently mixed, thenwater at 80-90 DEG C is added, and a mixture is dissolved into a first solution; nanometer titania, micro-carbon ferro chrome powder, water and ammonium hydroxide are mixed to obtain a second mixture;the first solution is added into the second mixture, after stirring, the porous powder, fiber glass filaments, polyethylene oxide and carboxymethyl cellulose are added to prepare a second muddy material; and the second muddy material is aged, then subjected to extrusion molding and then dried at 20-70 DEG C and calcinated at 480-550 DEG C. Through the preparation method, the catalyst capable of being used at 150-400 DEG C for synergetic dioxin removal and denitration can be prepared.

Description

technical field [0001] The invention relates to the fields of flue gas removal of dioxins and denitrification, in particular to a catalyst for synergistic denitration of dioxins and a preparation method thereof. Background technique [0002] Dioxin is a persistent organic pollutant, a strong carcinogen with a long half-life, strong chemical and thermal stability, and is difficult to be degraded and excreted in the organism, so it stays in the organism for a long time. And people are at the top of the food chain, so it is easy to transport dioxins into the human body through the gradual accumulation of the food chain, resulting in the enrichment of dioxins, resulting in "three causes" effects, namely teratogenicity, carcinogenicity and carcinogenicity. mutation. Therefore, there are clear emission standards for dioxins at home and abroad, and the emission standards currently implemented in most fields are: ≤0.1ng-TEQ / Nm 3 . [0003] The main sources of dioxins are domestic...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/72B01D53/56
CPCB01J23/8898B01J23/002B01J35/0013B01D53/8628B01D53/8668B01D2258/0283B01J2523/00B01J2523/24B01J2523/3706B01J2523/3712B01J2523/3725B01J2523/3743B01J2523/41B01J2523/47B01J2523/53B01J2523/55B01J2523/67B01J2523/68B01J2523/69B01J2523/72B01J2523/842B01J2523/845
Inventor 刘少光刘沁昱
Owner 上海瀚昱环保材料有限公司
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