High-efficiency denitrification ionic liquid and method of using the same

An ionic liquid and denitrification technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of inability to guarantee complete reaction and absorption, lower denitration efficiency, and difficulty in boiler renovation, and achieve a wide operating temperature range and improve Conversion effect, the effect of improving the conversion rate of NOx reduction

Active Publication Date: 2021-08-13
山东汇之蓝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unstable flue gas temperature or low time will cause low denitrification efficiency, unreacted ammonia or urea enters the tail flue, causing ammonia to escape, blocking the air preheater, corroding the flue, forming ammonium sulfate crystals, and producing Cloth bag crystallization affects the load and reduces the denitrification efficiency
[0005] Ozone denitrification method: The use of ozone oxidation technology has a good removal effect on NOx between 90-250 °C, but the existing technology cannot guarantee complete reaction and absorption, and ozone can react with almost any biological tissue, and incompletely reacted ozone enters secondary air pollution
[0006] PNCR denitrification technology: This process equipment is simple, the fixed investment is small, but the efficiency is low and the stability is poor
[0007] The ammonia water denitrification process has low efficiency and high operating costs. Some improved denitrification liquids are mixed with suspended particles, which can easily cause suspended particles to accumulate at the nozzle of the spray gun, causing blockage of the nozzle and affecting denitrification; at the same time, it is necessary to modify the spraying process. Make boiler retrofitting difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high-efficiency denitrification ionic liquid of the present invention includes the following components: 15 parts of urea-based organic peptide, 60 parts of deionized water, 5 parts of catalyst, 1 part of stabilizer, and 1 part of regulator. The above-mentioned components are added to high-speed dispersion equipment for high-speed dispersion. The reaction forms a stable ionic liquid;

[0024] The preparation steps of the ureido organic peptide are as follows:

[0025] 1) Amino acid and manganese nitrate generate amino acid metal salt pre-reactant at 60°C;

[0026] 2) Add urea and the amino acid metal salt pre-reactant obtained in step 1) into the reaction kettle, then add ethylene glycol and glycerol as chain extenders, and epichlorohydrin as condensation agents into the reaction kettle. Urea-based organic peptides synthesized by ring-opening reaction.

[0027] The catalyst is V 2 o 5 ; The regulator is ethanolamine; the stabilizer is polyacrylamide.

Embodiment 2

[0029] The high-efficiency denitrification ionic liquid of the present invention includes the following components: 30 parts of urea-based organic peptide, 80 parts of deionized water, 10 parts of catalyst, 5 parts of stabilizer, and 5 parts of regulator. The above-mentioned components are added to high-speed dispersion equipment for high-speed dispersion and dispersion. The reaction forms a stable ionic liquid;

[0030] The preparation steps of the ureido organic peptide are as follows:

[0031] 1) Amino acid and chromium nitrate generate amino acid metal salt pre-reactant at 80°C;

[0032] 2) Add urea and the amino acid metal salt pre-reactant obtained in step 1) into the reaction kettle, then add ethylene glycol and glycerol as chain extenders, and epichlorohydrin as condensation agents in the reaction kettle. Urea-based organic peptides synthesized by ring-opening reaction.

[0033] The catalyst is TiO 2 ; The regulator is composed of triethanolamine and dodecyl alcohol...

Embodiment 3

[0035] The high-efficiency denitrification ionic liquid of the present invention includes the following components: 25 parts of urea-based organic peptides, 70 parts of deionized water, 8 parts of catalysts, 3 parts of stabilizers, and 3 parts of regulators. The above components are added to high-speed dispersion equipment for high-speed dispersion and dispersion The reaction forms a stable ionic liquid;

[0036] The preparation steps of the ureido organic peptide are as follows:

[0037] 1) Amino acid and one or more of the nitrates of manganese, vanadium, chromium, and cerium generate amino acid metal salt pre-reactants at 60-80°C;

[0038] 2) Add urea and the amino acid metal salt pre-reactant obtained in step 1) into the reactor, then add ethylene glycol and glycerol as chain extenders, and epichlorohydrin as condensation agents in the reactor, at 65-80 Urea-based organic peptide synthesized by ring-opening reaction at ℃.

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PUM

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Abstract

The high-efficiency denitrification ionic liquid of the present invention belongs to the technical field of flue gas treatment, and comprises the following components: 15-30 parts of urea-based organic peptide, 60-80 parts of deionized water, 5-10 parts of catalyst, 1-5 parts of stabilizer, and regulator 1-5 parts, the above ingredients are added to the high-speed dispersion equipment for high-speed dispersion, and the dispersion reaction forms a stable and efficient denitrification ionic liquid; the method of using the high-efficiency denitrification ionic liquid is to spray the configured ionic liquid into the denitrification reactor with a spray gun , the operating temperature is 450-1250°C. The high-efficiency denitrification ionic liquid and its use method of the present invention, the high-efficiency ion denitration liquid is a colorless, odorless, non-corrosive liquid, which is safe in transportation and storage, convenient and simple to use, and has no secondary pollution. The product has a wide operating temperature range and can It operates at 450-1250°C; this method does not produce any crystallization and blockage; after the product is put into high temperature area, the flue gas is fully contacted with the denitrification ion liquid, which increases the reduction time of the liquid catalyst and flue gas to avoid escape.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to a high-efficiency denitrification ionic liquid and a use method thereof. Background technique [0002] NOx produced by the combustion of fossil fuels such as coal and oil is the main source of nitrogen oxides in the atmosphere. Excessive emission of NOx has caused more and more serious environmental pollution, such as photochemical smog, acid rain, ozone depletion and greenhouse effect, etc. In recent years, the state has implemented stricter standards for NOx emissions in the tail gas of power plants, and power plants have also taken many feasible measures to reduce the formation and emission of NOx during coal combustion. [0003] Among these technical measures, selective catalytic reduction, SCR denitrification technology has been proven to be one of the most mature and effective technologies for controlling NOx emissions in tail flue gas, and has been ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/56
CPCB01D53/56B01D2251/20B01D2259/124
Inventor 王洪亮王靖舒张溢珂
Owner 山东汇之蓝环保科技有限公司
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