Desulfurization synergist for calcium-based wet desulfurization, preparation and application method thereof

A technology of wet desulfurization and synergist, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problem that the stability of desulfurization synergist products affects the performance of desulfurization synergists, and the gypsum by-products that affect system stability Compositional purity, complex slurry components and other issues, to achieve the effect of improving the safety of use, increasing the scope of application, and reducing the number of openings

Inactive Publication Date: 2018-06-19
BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved is: the existing desulfurization synergist has a wide variety of components, complex proportions, high cost, and too many components will complicate the slurry components, which will affect the stability of the system and the composition purity of gypsum by-products , and the quantitative problem of each component in the configuration process, the product stability of each batch of desulfurization synergist will affect the long-term performance of the desulfurization synergist

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  • Desulfurization synergist for calcium-based wet desulfurization, preparation and application method thereof

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Embodiment Construction

[0038] Preparation Example

[0039] The desulfurization synergist for calcium-based wet desulfurization of the present invention is prepared according to the following method, specifically comprising the following steps:

[0040] Step 1, prepare acrylic acid copolymer, specifically comprise the following steps:

[0041] Step A, replace the air in the airtight reactor with nitrogen;

[0042] Step B, under airtight conditions, add the isopropanol solution containing inert monomer and carboxyl-containing monomer;

[0043] Step C, under airtight conditions, add an isopropanol solution containing azobisisobutyronitrile; the amount of azobisisobutyronitrile is 0.5-1% of the total weight of the inert monomer and the carboxyl group-containing monomer;

[0044] Step D, keeping stirring the reaction solution, heating to 60°C, and polymerizing for 2-4 hours;

[0045] Step E, after the reaction is over, evaporate the isopropanol, and raise the temperature of the polymerized product to ...

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Abstract

Relating to the technical field of desulfurization synergists, the invention discloses a desulfurization synergist for calcium-based wet desulfurization, and a preparation and application method thereof. The desulfurization synergist comprises 50-70% of an acrylic copolymer and 30-50% of a polysaccharide compound by mass percentage. The acrylic copolymer is prepared by copolymerization reaction ofa carboxyl-containing monomer and an inert monomer in a mass ratio of 1:2-5. The desulfurization synergist provided by the invention has simple composition, can effectively improve the desulfurization efficiency, reduce the calcium-sulfur ratio of calcium-based wet desulfurization, lower the operation energy consumption of the desulfurization system, and ensure the system stability and the purityof the gypsum by-product, and effectively avoids some small molecule substances in the composition from entering the atmosphere along with flue gas.

Description

technical field [0001] The invention relates to the technical field of desulfurization synergists, in particular to a desulfurization synergist for calcium-based wet desulfurization and a preparation and use method thereof. Background technique [0002] The most commonly used method for flue gas purification and desulfurization is calcium-based wet desulfurization, which is the limestone-gypsum desulfurization process. The principle is to use limestone slurry as an absorbent to absorb SO in flue gas. 2 And generate calcium sulfite, the generated calcium sulfite is forcibly oxidized to calcium sulfate by the oxygen in the air blown by the blower in the slurry tank of the absorption tower. Under the condition of reaching a certain slurry density, the desulfurization slurry rich in calcium sulfate passes through Separation, dehydration and other means to obtain desulfurization gypsum. Due to the cheap desulfurization agent and wide sources of this technology, low investment in...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50
CPCB01D53/502B01D53/80B01D2251/404B01D2258/0283
Inventor 梅雪路光杰王洪亮杨建辉张东辉张军
Owner BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENG
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