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Coal desulfurization technology

A coal and process technology, which is applied in the process field of coal desulfurization, can solve the problems of reduced blast furnace production capacity and high coking ratio

Inactive Publication Date: 2014-10-15
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to remove sulfur, it is necessary to increase the amount of limestone and coke in blast furnace production, resulting in reduced blast furnace production capacity and high coking ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A coal desulfurization process, comprising the steps of:

[0031] S1. Take an appropriate amount of coal and pulverize it, with a particle size of 0.075mm;

[0032] S2, the pulverized coal obtained in step S1 is placed in a reactor, and 20 parts of sodium hypochlorite with a concentration of 30 mg / L are added, and stirred evenly;

[0033] S3. Adjust the pH of the solution obtained in step S2 to 7, add an appropriate amount of ammonium persulfate several times, stir evenly, and react for 25 minutes;

[0034] S4. Heat the solution obtained in step S3 to 120° C., add 25 parts of tetrachlorethylene and 25 parts of p-cresol, stir evenly, and extract for 100 minutes;

[0035] S5, add 16 parts of HEDP iron complex, 16 parts of hydroquinone and 16 parts of nitrilotriacetic acid, stir evenly;

[0036] S6, add 7 parts of manganese dioxide, stir evenly, and oxidize for 60min;

[0037] S7. Under stirring, 3 parts of polyaluminum ferric chloride, 1 part of urea, 1 part of polyacr...

Embodiment 2

[0041] A coal desulfurization process, comprising the steps of:

[0042] S1. Take an appropriate amount of coal and pulverize it, with a particle size of 0.075mm;

[0043] S2, the pulverized coal obtained in step S1 is placed in a reactor, and 25 parts of sodium hypochlorite with a concentration of 100 mg / L are added, and stirred evenly;

[0044] S3. Adjust the pH of the solution obtained in step S2 to 7, add an appropriate amount of ammonium persulfate several times, stir evenly, and react for 25 minutes;

[0045] S4. Heat the solution obtained in step S3 to 120° C., add 32 parts of tetrachlorethylene and 32 parts of p-cresol, stir evenly, and extract for 100 minutes;

[0046] S5, add 21 parts of HEDP iron complex, 21 parts of hydroquinone and 21 parts of nitrilotriacetic acid, stir evenly;

[0047] S6, add 12 parts of manganese dioxide, stir evenly, and oxidize for 60 minutes;

[0048] S7. Under stirring, 5 parts of polyaluminum ferric chloride, 2 parts of urea, 2 parts o...

Embodiment 3

[0052] A coal desulfurization process, comprising the steps of:

[0053] S1. Take an appropriate amount of coal and pulverize it, with a particle size of 0.075mm;

[0054] S2, the pulverized coal obtained in step S1 is placed in a reactor, and 22.5 parts of sodium hypochlorite with a concentration of 65 mg / L are added, and stirred evenly;

[0055] S3. Adjust the pH of the solution obtained in step S2 to 7, add an appropriate amount of ammonium persulfate several times, stir evenly, and react for 25 minutes;

[0056] S4. Heat the solution obtained in step S3 to 120° C., add 28.5 parts of tetrachlorethylene and 28.5 parts of p-cresol, stir evenly, and extract for 100 minutes;

[0057] S5, add 18.5 parts of HEDP iron complex, appropriate amount of hydroquinone and nitrilotriacetic acid, and stir evenly;

[0058] S6, add 9.5 parts of manganese dioxide, stir evenly, and oxidize for 60 minutes;

[0059] S7. Under stirring, add 4 parts of polyaluminum ferric chloride, 1.5 parts of u...

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Abstract

The invention discloses a coal desulfurization technology, which mainly comprises the steps of mixing and processing a special type emulsifying agent, a dispersing agent, a cleaning agent, a complexing agent and a penetrating agent in certain proportions according to scientific combination. According to the combustion reaction mechanism of coal, a complexing coal washing desulfurizing agent composition is added into a coal washing desulfuration device, so that hazardous substances like inorganic sulfur and organic sulfur compounds in the coal can form sulfur compounds soluble in water through chemical reaction under the actions of oxidation, catalyzation and metal ion exchange, and the purpose of environmental protection can be achieved.

Description

technical field [0001] The invention relates to the field of coal desulfurization, in particular to a process for coal desulfurization. Background technique [0002] Sulfur in coal usually exists in the state of organic sulfur and inorganic sulfur. The composition and structure of organic sulfur is very complex, and the main forms are mercaptan, thioether, disulfide, and thioquinone and thiophene in heterocyclic state; organic sulfur mainly comes from the protein of coal-forming plants and microbial protein; the protein contains The sulfur content is 0.3% to 2.4%, and most coals with a total sulfur content generally less than 0.5% are generally dominated by organic sulfur. Inorganic sulfur in coal mainly comes from various sulfur-containing compounds and a small amount of sulfate in minerals. The difficulty of removing sulfur from sulfides is related to the particle size and distribution of sulfides. Those with large particle sizes can be removed by washing, and those with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02C10L9/06
Inventor 刘松葛涛夏浩汪鹏卢旭东
Owner ANHUI UNIV OF SCI & TECH
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