CN101816919B - Method for improving coke adsorption - Google Patents

Method for improving coke adsorption Download PDF

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Publication number
CN101816919B
CN101816919B CN 201010153112 CN201010153112A CN101816919B CN 101816919 B CN101816919 B CN 101816919B CN 201010153112 CN201010153112 CN 201010153112 CN 201010153112 A CN201010153112 A CN 201010153112A CN 101816919 B CN101816919 B CN 101816919B
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Prior art keywords
closed reactor
coke
gas
nitrogen
pressure
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CN101816919A (en
Inventor
刘尚超
薛改凤
朱书景
张垒
方宏辉
张前香
陈鹏
宋子逵
张雪红
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Wuhan Iron and Steel Group Corp
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Wuhan Iron and Steel Group Corp
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Abstract

The invention relates to a method for improving coke adsorption. The method comprises the following steps of: putting coke into a closed reactor; charging inert gas such as nitrogen or argon into the closed reactor till the closed reactor has no air; when the inert gas such as nitrogen or argon is charged, heating the closed reactor to between 800 and 1,100 DEG C; when the closed reactor is heated to 800 DEG C, introducing CO2 gas into the closed reactor till the pressure in the closed reactor reaches 1.1 to 2.0MPa, and stabilizing the pressure for 20 to 120 minutes; after the pressure stabilization is finished, stopping introducing the CO2 gas and heating; then introducing the inert gas such as nitrogen or argon into the closed reactor till the closed reactor has no CO2 gas; meanwhile, naturally cooling the closed reactor to room temperature; and taking the modified coke out. The porosity of the modified coke is improved to 60 percent from primary 30 percent around; the vacuum degree is reduced to 800kg/m<3>, and reduced by nearly 30 percent compared with the un-modified coke; and inner micro-pores of the coke are obviously enlarged.

Description

A kind of method that improves coke adsorption
Technical field
The present invention relates to coke, specifically belong to the method that improves or improve the coke adsorption energy.
Background technology
In the Environmental Technology field, coke is because it has certain adsorptivity, cheapness, the characteristics such as be easy to get, more and more adsorbents that are used as.But coke adsorption can hang down deep development and the application that is always restricting this adsorbent.Through actual measurement, the real density of coke is generally at 1100kg/m 3About, porosity is generally about 35%.Real density and porosity be affect coke adsorption can an important indicator, such as in addition modification of STRENGTH ON COKE not, the absorption property of coke is then limited.Therefore improve the coke porosity, reduce the coke real density, improving coke adsorption can be to promote the key that coke is used in environmental project as adsorbent.The method that improves at present the coke adsorption energy is mainly crush method and chemical corrosion method: crush method is about to coke and is crushed to very little particle diameter, with raising coke ratio surface area, thus the absorption property of raising coke.Chemical corrosion method mainly is with strong acid or strong oxidizer chemicals corrosion coke surface, forms hole in coke surface, thereby improves the adsorptivity of coke.There is the shortcoming of following several respects in these two kinds of methods:
1) just improve the coke adsorption energy from improving the coke ratio surface area simply, and do not change the cavernous structure of coke inside, thus limited to the raising of absorption property.
2) coke after the crush method modification is fine particle, and packing phenomenon in use easily occurs, and causes and uses inconvenience.
3) chemical corrosion method easily causes spent acid and waste liquid in modifying process, forms secondary pollution.
3) crush method energy consumption in modifying process is higher, causes the coke modification cost high.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of by improving charred coal porosity, reduce the coke real density and improve the inner cavernous structure of coke, thus improve coke adsorption can method.
Realize the technical measures of above-mentioned purpose:
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen or argon gas are filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen or argon gas, closed reactor is heated, the control heating-up temperature is 800～1100 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.1～2.0Mpa, and voltage stabilizing 20～120 minutes under 1.1～2.0Mpa pressure, 800～1100 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen or argon gas after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, make closed reactor naturally cool to room temperature;
6) modified coke in the taking-up closed reactor.
It is: voltage stabilizing is 45～70 minutes under 1.1～2.0Mpa pressure, 800～1100 ℃ of temperature conditions.
The present invention is compared with prior art:
1) the coke porosity can bring up to 60% by original about 30% after its modification, compares with unmodified coke, and the porosity improves nearly one times;
2) real density can be reduced to 800kg/m 3, to compare with unmodified coke, real density reduces nearly 30%;
3) internal capillary of coke is also obviously increased.
Description of drawings
Fig. 1 is the internal capillary situation of the coke before the present invention
Fig. 2 is the internal capillary situation of coke behind employing the present invention
The specific embodiment
The below is described in detail
Embodiment 1
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen is filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen, closed reactor is heated to 800～830 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.1Mpa, and voltage stabilizing 20 minutes under 1.1Mpa pressure, 800～830 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, closed reactor is naturally cooled to room temperature;
6) modified coke in the taking-up closed reactor.
Embodiment 2
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) argon gas is filled with in the closed reactor, until till existing without air in the closed reactor; In applying argon gas, closed reactor is heated to 890～910 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.3Mpa, and voltage stabilizing 45 minutes under 1.3Mpa pressure, 890～910 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately argon gas after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, closed reactor is naturally cooled to room temperature;
6) modified coke in the taking-up closed reactor.
Embodiment 3
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen is filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen, closed reactor is heated to 950～965 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.55Mpa, and voltage stabilizing 70 minutes under 1.55Mpa pressure, 950～965 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, closed reactor is naturally cooled to room temperature;
6) modified coke in the taking-up closed reactor.
Embodiment 4
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen is filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen, closed reactor is heated to 990～1015 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.8Mpa, and voltage stabilizing 95 minutes under 1.8Mpa pressure, 990～1015 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, closed reactor is naturally cooled to room temperature;
6) modified coke in the taking-up closed reactor.
Embodiment 5
A kind of method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen is filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen, closed reactor is heated to 1085～1100 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 2.0Mpa, and voltage stabilizing 120 minutes under 2.0Mpa pressure, 1085～1100 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, closed reactor is naturally cooled to room temperature;
6) modified coke in the taking-up closed reactor.
Need to prove, in an embodiment, what be filled with in the closed reactor mostly is greatly nitrogen, is to consider Cost Problems, because the production costs such as neon, Krypton, xenon are very high, therefore adopt.When not considering cost, be to be used as the gas that is filled with of the present invention fully.
The modified coke of above-described embodiment after testing, it the results are shown in Table 1.
Table 1 modified coke testing result
Embodiment 1 2 3 4 5
Coke porosity (%) 39.12 42.18 48.37 53.12 57.64
Real density (kg/m 3) 951 923 882 861 823

Claims (2)

1. method that improves coke adsorption, its step:
1) coke is inserted in the closed reactor of anti-1200 ℃ and above temperature;
2) nitrogen or argon gas are filled with in the closed reactor, until till existing without air in the closed reactor; In inflated with nitrogen or argon gas, closed reactor is heated, the control heating-up temperature is 800～1100 ℃;
3) be heated when reaching 800 ℃ when closed reactor, begin to pass into CO 2Gas, until the pressure in the closed reactor reaches 1.1～2.0Mpa, and voltage stabilizing 20～120 minutes under 1.1～2.0Mpa pressure, 800～1100 ℃ of temperature conditions;
4) after voltage stabilizing finishes, stop CO 2Gas input and heating;
5) stop CO 2Input immediately nitrogen or argon gas after the gas input, until in the closed reactor without CO 2Till gas exists; Simultaneously, make closed reactor naturally cool to room temperature;
6) modified coke in the taking-up closed reactor.
2. a kind of method that improves coke adsorption as claimed in claim 1 is characterized in that: voltage stabilizing is 45～70 minutes under 1.1～2.0Mpa pressure, 800～1100 ℃ of temperature conditions.
CN 201010153112 2010-04-16 2010-04-16 Method for improving coke adsorption Expired - Fee Related CN101816919B (en)

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CN103007883B (en) * 2012-12-13 2014-12-24 武汉钢铁(集团)公司 Iron and steel industrial wastewater iron remover and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1031804A (en) * 1988-10-22 1989-03-22 冶金工业部建筑研究总院 Absorbent for greasy flue gas and preparation method thereof
WO2006030668A1 (en) * 2004-09-17 2006-03-23 Nippon Petroleum Refining Company, Limited Adsorbent, method for producing same, and method for processing oil-containing wastewater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1031804A (en) * 1988-10-22 1989-03-22 冶金工业部建筑研究总院 Absorbent for greasy flue gas and preparation method thereof
WO2006030668A1 (en) * 2004-09-17 2006-03-23 Nippon Petroleum Refining Company, Limited Adsorbent, method for producing same, and method for processing oil-containing wastewater

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢复青，等.改性焦碳处理亚甲基蓝染料废水研究.《广西梧州师范高等专科学校学报》.2005,第21卷(第3期), *

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