Macromolecular dry-process denitration agent, and preparation method and application thereof

A denitration agent and polymer technology, applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve problems such as ash accumulation and crystallization in economizer air preheaters, failure to meet NOx emission requirements, and shortened equipment service life. , to achieve the effect of reducing maintenance and operating costs, preventing grate embrittlement, and reducing ash accumulation and crystallization

Inactive Publication Date: 2020-01-03
沈阳华盟环保节能工程有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the denitrification efficiency is generally ≤60%, and it can only have a 60% denitrification effect on a high-temperature cyclone-separated fluidized bed boiler. If it is on a pulverized coal furnace, a low-temperature cyclone-separated fluidized bed boiler and a chain boiler, Because there is no suitable temperature condition for denitrification, the denitrification efficiency is less than 40%, which does not meet the NOx emission requirements of existing policies
In addition, in this technology, there is still such a problem, that is, the urea dissolved in hot water is sprayed into the furnace, causing embrittlement of the grate, high humidity of flue gas, ash deposit and crystallization of economizer air preheater, affecting boiler efficiency and Cause pipe and flue corrosion, shorten the service life of equipment, and increase maintenance costs

Method used

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  • Macromolecular dry-process denitration agent, and preparation method and application thereof
  • Macromolecular dry-process denitration agent, and preparation method and application thereof
  • Macromolecular dry-process denitration agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Polymer dry denitrification agent and its preparation method:

[0032] The polymer dry denitrification agent is composed of the following raw materials by weight percentage, urea 60wt%, aluminum hydroxide 1wt%, sodium hydroxide 27wt%, manganese dioxide 12wt%.

[0033] Among them, urea and sodium hydroxide are reducing agents, aluminum hydroxide is a moisture-proof agent, and manganese dioxide is a catalyst.

[0034] Its preparation method comprises the following steps:

[0035] The first step is to measure and weigh the raw materials in sufficient quantities. Aluminum hydroxide and manganese dioxide do not need to be ground. Under the condition of drying temperature ≤ 15°C, grind urea and sodium hydroxide into fine particles with a mesh size below 200. powder spare;

[0036] The second step is to mix and stir the urea powder below 200 mesh and aluminum hydroxide in proportion after the first step, and the stirring time is 30 minutes to 60 minutes.

[0037] The third ...

Embodiment 2

[0045] The polymer dry denitrification agent is composed of the following raw materials in weight percent, urea 91.05wt%, aluminum hydroxide 3wt%, sodium hydroxide 4.95wt%, manganese dioxide 1wt%.

[0046] Its preparation method and application method are the same as in Example 1, and will not be described in detail.

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Abstract

The invention discloses a macromolecular dry-process denitration agent, and a preparation method and application thereof. The macromolecular dry-process denitration agent consists of the following rawmaterials in percentage by weight: 60-91.05 wt% of urea, 1-3 wt% of aluminum hydroxide, 4.95-27 wt% of sodium hydroxide and 1-12 wt% of manganese dioxide. The macromolecular dry-process denitration agent is formed by scientifically compounding and processing the raw materials according to the designed proportion, and thus the effects that nitrogen oxide and nitrogen dioxide in boiler flue gas areconverted into nitrogen and water and the boiler flue gas is discharged up to standard can be achieved. The macromolecular dry-process denitration agent has simple components and a good denitration effect, and practice proves that denitration efficiency can reach 85% or above.

Description

technical field [0001] The invention belongs to the technical field of boiler flue gas denitrification, in particular relates to a polymer dry denitrification agent, and also relates to a preparation method and application thereof. Background technique [0002] In recent years, my country's energy conservation and emission reduction work has achieved remarkable results. The State Council issued a full awareness of the importance and urgency of further energy conservation and emission reduction work. At present, my country's economic development has entered a new normal, the optimization of industrial structure has accelerated significantly, the growth rate of energy consumption has slowed down, and the development of resource-based, energy-intensive, and high-emission industries has gradually declined. However, we must be soberly aware that with the acceleration of industrialization and urbanization and the continuous upgrading of consumption structure, my country’s energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/83
CPCB01D53/565B01D53/83B01D2251/2067B01D2251/304B01D2251/604B01D2258/0283
Inventor 李轩辉张宁刘少君
Owner 沈阳华盟环保节能工程有限公司
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