A method based on seaweed char desulfurization, denitrification and mercury removal and preparation method of seaweed char

A technology for desulfurization, denitrification, mercury removal, and seaweed coke, which is applied in separation methods, chemical instruments and methods, coking ovens, etc., can solve problems such as poor ability to remove multiple pollutants, difficulty in large-scale industrial application, and slow research progress. Good flue gas simultaneous desulfurization, denitrification and mercury removal performance, good development and industrial value, and the effect of cheap and easy-to-obtain raw materials

Inactive Publication Date: 2016-08-31
JIANGSU UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Adsorption flue gas purification technology is a traditional flue gas treatment technology. It has the characteristics of small initial investment, simple process flow and easy removal of multiple pollutants at the same time. It is a flue gas purification technology with good development and application prospects. , but the research progress of the traditional adsorption flue gas purification technology has been relatively slow. There are three main reasons: first, the existing mature adsorbents, such as activated carbon, are extremely expensive and difficult to achieve large-scale industrial application; second, Most of the new adsorbents currently researched generally have the disadvantages of high cost, poor stability, and poor ability to remove multiple pollutants; thirdly, the reactors currently used for adsorbent adsorption mainly include fixed bed reactors and fluidized bed reactors. The mass transfer rate of both reactors is low

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  • A method based on seaweed char desulfurization, denitrification and mercury removal and preparation method of seaweed char
  • A method based on seaweed char desulfurization, denitrification and mercury removal and preparation method of seaweed char
  • A method based on seaweed char desulfurization, denitrification and mercury removal and preparation method of seaweed char

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Effect test

Embodiment 1

[0043] Dry the seaweed naturally in a ventilated state and chop it into 100-mesh seaweed powder, then put it into a temperature-controlled stirring tank, stir with water at 60°C for 2 hours, and repeat five times. Water and nitric acid were used as a mixed solvent (the mass percent of nitric acid in the mixed solvent was 10%), stirred at 40° C. for 6 hours, filtered, and then the seaweed was naturally dried for 240 hours in a ventilated state. The naturally dried seaweed was dried in a temperature-controlled drying oven at 105° C. for 8 hours to obtain anhydrous seaweed. Anhydrous seaweed was crushed into seaweed powder with a particle size of 100 mesh and placed in a tube furnace. 2 and N 2 Under a mixed atmosphere with a volume ratio of 1:2, pyrolyze at 500° C. for 15 minutes, and cool to normal temperature to obtain biomass char made from seaweed. The biomass coke made from seaweed was crushed into 100 mesh particles, soaked in ammonium metavanadate solution with a mass f...

Embodiment 2

[0045] Dry the seaweed naturally in a ventilated state and chop it into 100-mesh seaweed powder, then put it into a temperature-controlled stirring tank, stir with water at 80°C for 2 hours, and repeat five times. Water and nitric acid were used as a mixed solvent (the mass percent of nitric acid in the mixed solvent was 20%), stirred at 60° C. for 6 hours, and after filtering, the seaweed was naturally dried for 240 hours under ventilated conditions. The naturally dried seaweed was dried in a temperature-controlled drying oven at 105° C. for 8 hours to obtain anhydrous seaweed. Anhydrous seaweed was crushed into seaweed powder with a particle size of 100 mesh and placed in a tube furnace. 2 and N 2 Under a mixed atmosphere with a volume ratio of 1:1, pyrolyze at 500° C. for 15 minutes, and cool to normal temperature to obtain biomass char made from seaweed. The biomass coke made from seaweed was crushed into 100-mesh particles, soaked in a 5% sodium metavanadate solution fo...

Embodiment 3

[0047] The seaweed was naturally dried under ventilation and chopped into 150-mesh seaweed powder, then put into a temperature-controlled stirring tank, stirred with water at 80°C for 2 hours, and repeated five times. Water and nitric acid were used as a mixed solvent (the mass percent of nitric acid in the mixed solvent was 25%), stirred at 80°C for 6 hours, filtered, and the seaweed was naturally dried for 240 hours in a ventilated state. The naturally dried seaweed was dried in a temperature-controlled drying oven at 105° C. for 8 hours to obtain anhydrous seaweed. Anhydrous seaweed was crushed into seaweed powder with a particle size of 100 mesh and placed in a tube furnace. 2 and N 2 Under a mixed atmosphere with a volume ratio of 1:2, pyrolyze at 700° C. for 15 minutes, and cool to normal temperature to obtain biomass char made from seaweed. The biomass coke made from seaweed was crushed into 150 mesh particles, soaked in 10% sodium metavanadate solution for 12 hours, ...

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Abstract

The invention relates to a seaweed gel based desulfurization, denitrification and demercuration method by use of a dual-spouted bed. According to the method, the seaweed is adopted for pyrolysis to prepare biomass char used as a flue gas desulfurization, denitrification and demercuration adsorbent, and desulfurization, denitrification and demercuration can be realized simultaneously in a spouted bed reactor; sulfur, nitrogen and mercury resources are recycled in a membrane separator, and the adsorbent is regenerated. According to the method, the seaweed is utilized for pyrolysis to prepare biomass char for desulfurization, denitrification and demercuration, no secondary pollution is caused in a desorption process, the adsorbent raw materials are renewable resources with wide reserves, and the method has wide development and application prospects.

Description

technical field [0001] The invention relates to the field of combustion flue gas pollutant control, in particular to a method for simultaneous desulfurization, denitrification and demercuration of double spouted beds based on seaweed coke. Background technique [0002] Sulfur oxides, nitrogen oxides, and mercury produced during combustion can cause serious hazards such as acid rain, photochemical smog, and carcinogenicity and teratogenicity. Therefore, developing effective methods for flue gas desulfurization, denitrification and mercury removal is one of the important tasks of environmental protection scientists and technicians in various countries. [0003] In recent years, although people have developed a large number of flue gas desulfurization, denitrification and demercury technologies, due to the limitations of human understanding and the gradual development of science and technology, the existing desulfurization, denitration and demercury technologies were only devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/06B01J20/20B01J20/30C10B53/02C10B57/06
CPCY02E50/10
Inventor 刘杨先王燕潘剑锋
Owner JIANGSU UNIV
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