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A kind of method for starting nitric oxide biological absorption tower with spherical non-woven packing

A technology of nitric oxide and spherical fillers, applied in chemical instruments and methods, separation methods, anaerobic digestion, etc., can solve the problems of high investment and operation costs, generation of greenhouse gases, easy deactivation of catalysts, etc., and achieve low operating costs , Absorption efficiency improvement, environment-friendly effect

Active Publication Date: 2019-08-13
DALIAN UNIV OF TECH
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Problems solved by technology

Among the existing flue gas denitrification technologies, selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) dry denitrification have been applied to a certain extent in industry, but both have high investment and operation costs, easy catalyst deactivation, ammonia Disadvantages such as leakage; the feasibility and economy of other denitrification technologies such as plasma method, oxidation (sodium hypochlorite, hydrogen peroxide, etc.) absorption method need to be further studied
Wet biological nitrification and denitrification methods have the advantages of low investment and operation costs, but they require additional carbon sources, which will generate greenhouse gases

Method used

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  • A kind of method for starting nitric oxide biological absorption tower with spherical non-woven packing
  • A kind of method for starting nitric oxide biological absorption tower with spherical non-woven packing

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Embodiment Construction

[0019] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions (and accompanying drawings).

[0020] A tower-type anammox reactor for absorbing nitric oxide started with a non-woven spherical packing.

[0021] The filler is a small ball of 25mm*20mm, and the structure of the filler is as follows figure 1 As shown, the reactor is a tower anaerobic ammonium oxidation reactor. The running time of one cycle is 150 days, when the reactor is started, the NH 4 + -N concentration is 45-55 mg / L; add potassium dihydrogen phosphate, set H 2 PO 4 - The concentration is 18-22 mg / L, add potassium bicarbonate, set the concentration to 500mg / L, add inorganic salt, set Na + The concentration is 8-12 mg / L, K + The concentration is 12-16 mg / L, Mg + The concentration is 18-22 mg / L, and Fe(II)EDTA is added at a concentration of 0.05mol / L.

[0022] The tower-type anammox reactor is made of plexiglass in a cylindrical s...

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Abstract

The invention belongs to the technical field of biological treatment of waste gas and relates to a spherical non-woven fabric filling started tower type anaerobic ammonia oxidation reactor. Filling is of an orange-segment-shape-like structure formed by uniformly arraying a framework, formed by modifying an original polyhedron hollow sphere, and a non-woven fabric. The filling is stacked in an absorption tower and is used for carrying out film formation through spraying anaerobic ammonia oxidation bacterium liquid; artificially synthesized ammonia-nitrogen wastewater is sprayed at the upper part; nitric oxide enters from the lower part of the reactor and is in countercurrent contact with liquid to be removed. The spherical non-woven fabric filling started tower type anaerobic ammonia oxidation reactor has the effects and benefits that a liquid film is easily formed by the spherical filling and absorption of gas is facilitated; the non-woven fabric on the filling has a large specific surface area and a coarse surface; the adhesion, growth and reproduction of anaerobic ammonia oxidation bacteria are facilitated; the removing efficiency of the nitric oxide is easy to improve; compared with traditional biological denitration, the reactor is environmentally friendly and has low operation cost; a sustainable treatment technology combining flue gas denitration and sewage denitrification is provided and has relatively good potential application prospect.

Description

technical field [0001] The invention belongs to the technical field of waste gas biological treatment, and relates to a non-woven fabric spherical packing start-up tower-type anammox reactor, in particular to a method for removing nitric oxide in flue gas through anaerobic ammonium oxidation reaction . Background technique [0002] my country has made remarkable progress in pollution control through the "Ninth Five-Year Plan", "Tenth Five-Year Plan", "Eleventh Five-Year Plan" and "Twelfth Five-Year Plan". The deterioration of water pollution has been curbed, but the air pollution situation is becoming more and more serious. Nitrogen oxides (NOx: NO+NO2) are one of the main pollutants that cause air pollution. my country has included NOx reduction as a mandatory assessment indicator in the "Twelfth Five-Year Plan". Among the existing flue gas denitrification technologies, selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) dry denitrification hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84B01D53/56C02F3/28C02F101/16
CPCB01D53/56B01D53/84B01D2251/95B01D2257/404C02F3/28C02F2101/16Y02A50/20
Inventor 徐晓晨杨凤林王晓静张芸
Owner DALIAN UNIV OF TECH
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