CN101496988A - Method for eliminating potassium and sodium vapor in process for preparing active carbon - Google Patents
Method for eliminating potassium and sodium vapor in process for preparing active carbon Download PDFInfo
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- CN101496988A CN101496988A CNA2009100736832A CN200910073683A CN101496988A CN 101496988 A CN101496988 A CN 101496988A CN A2009100736832 A CNA2009100736832 A CN A2009100736832A CN 200910073683 A CN200910073683 A CN 200910073683A CN 101496988 A CN101496988 A CN 101496988A
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Abstract
The invention relates to a method for removing kalium steam and sodium steam produced in the process of preparing active carbon. According to weight ratio of 1:1-10, a carbonaceous precursor and KOH or NaOH are evenly mixed; in the presence that every kilogram of the carbonaceous precursor needs 100 to 1,000 litre/hour inert atmosphere, room temperature is risen to a temperature of between 800 and 1,000 DEG C; the mixture is activated for 0.5 to 2 hours; in the activating process, tail gas produced by reaction is introduced to a water tank filled with liquid water till the reaction is finished; and when the temperature is reduced to the temperature of 200 DEG C, the inert atmosphere stops to be introduced, wherein the mixture ratio of the liquid water to carbonaceous precursor is between 1,500 litres to 1 kilogram and 3,000 litres to 1 kilogram. The method has the advantages of lower cost and easier operation.
Description
Technical field
The present invention relates to a kind of method of eliminating potassium, sodium vapor, is the sodium that produces in the elimination activity charcoal preparation process, the method for potassium vapor specifically.
Background technology
At present, prepare the method that active carbon with high specific surface area generally need use chemical activation, such as adopt KOH or NaOH at high temperature with contain charcoal precursor such as petroleum coke, coal reacts, in course of reaction, unavoidably to produce the steam of metallic potassium or sodium, and with the form effusion reaction system of steam.The coal tar in addition of thereupon overflowing, H2, methane, some harmful inflammable components such as CO, CO2 therefore if will reclaim these components and be separated relatively difficulty, but can not be discharged into it in atmosphere, so must be handled.
At present, Chinese invention patent " a kind of method of reducing metallic potassium harm " (application number: be that steam and vapor of alcohols are added in the reacting furnace 200710022323.0), so that the metallic potassium steam that produces in the course of reaction contacts KOH or potassium alcoholate that afterreaction generates solid with above-mentioned gas, this KOH or potassium alcoholate can turn back in the reaction system, thereby change the metallic potassium of gaseous state into solid-state product.In addition, this patent has emphasized that also the consumption of steam is more the least possible, to guarantee that can eliminate metallic potassium can guarantee again to reduce to minimum with the reaction that contains carbon precursor simultaneously.But after all steam in reactor will with contain charcoal precursor reaction, make that this reaction no longer is pure chemical activation, cause the specific area of final active carbon to descend, and the quantity of steam is generally wayward, therefore should invention in actual mechanical process, implement relatively difficulty, be difficult for obtaining high performance super-activated carbon.
Summary of the invention
Purpose of the present invention just provides that a kind of not only control was simultaneously but also do not influence the potassium that produces in the elimination activity charcoal preparation process of final products performance, the method for sodium vapor easily.
Enforcement principle of the present invention is as follows:
Because metallic potassium and sodium are extremely active, will carry out violent reaction when running into water, steam, air, thereby set off an explosion, serious consequence such as burning.If but the steam of potassium or sodium, because it is made of extremely small drop, the possibility of burning of setting off an explosion when then it is with the substance reaction of water one class is minimum, so can utilize this principle to carry out removing of potassium or sodium vapor.
For this reason, the present invention feeds the mixture of the many pernicious gases that contain metallic potassium or sodium vapor that produce in the course of reaction in the water tank that fills a large amount of aqueous waters together, the method that absorbs by bubbling changes the steam of metallic potassium in the reaction end gas or sodium the aqueous solution of KOH or NaOH into, thereby has eliminated the harm that produces when metallic potassium or sodium enter atmosphere.
Concrete implementation process is as follows:
With weight ratio is that the contain carbon precursor and KOH or NaOH of 1:1-10 mixes, with per kilogram contain the charcoal precursor need the 100-1000 liter/hour inert atmosphere exist down, being raised to 800-1000 ℃ from room temperature activates, activate 0.5-2 hour, in this activation process, the tail gas feeding that reaction is produced fills in the water tank of aqueous water, until reaction finishes to stop to feed inert atmosphere when the back temperature drops to 200 ℃; Wherein aqueous water is the 1500-3000 liter with the proportioning that contains the charcoal precursor: 1 kilogram.
Aforesaidly contain the carbide that carbon precursor is petroleum coke, needle coke, coal, various plant housing or resin.
Aforesaid inert atmosphere is nitrogen or argon gas.
Advantage of the present invention:
When metallic potassium that 1 reaction produces or sodium vapor feed in the water, can be generated the aqueous solution of KOH or NaOH, not have the pollution of metallic potassium or sodium vapor in the tail gas by fast reaction;
2 owing to feed reaction end gas in the aqueous solution, also can simultaneously the coal tar wet goods harmful substance condensation in the tail gas be got off, thereby reduce the pollution level of tail gas to environment;
3 the present invention are liquid water owing to what adopt, do not need vaporous water or alcohol vapor, so cost are lower;
4 owing to be that reaction end gas is directly fed in the aqueous solution, therefore need not how to control, and simplified operating procedure greatly.
The specific embodiment
Embodiment 1
With weight ratio is that petroleum coke and the KOH (1 kilogram of gross weight) of 1:1 mixes, and is raised to 1000 ℃ from room temperature in 100 liters of/hour N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 500 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of metallic potassium in this course of reaction.
Embodiment 2
With weight ratio is that anthracite and the KOH (10 kilograms of gross weights) of 1:10 mixes, and is raised to 800 ℃ from room temperature in 10000 liters of/hour Ar atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 30000 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of metallic potassium in this course of reaction.
Embodiment 3
With weight ratio is that coconut husk carbide and the KOH (10 kilograms of gross weights) of 1:6 mixes, and is raised to 900 ℃ from room temperature in 600 liters of/hour N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 5000 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of metallic potassium in this course of reaction.
Embodiment 4
With weight ratio is that anthracite and the NaOH (1 kilogram of gross weight) of 1:1 mixes, and is raised to 1000 ℃ from room temperature in 200 liters of/hour N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 500 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of sodium metal in this course of reaction.
Embodiment 5
With weight ratio is that needle coke and the NaOH (100 kilograms of gross weights) of 1:5 mixes, and is raised to 950 ℃ from room temperature at 20m3/ hour in the N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 50m3 water always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of sodium metal in this course of reaction.
Embodiment 6
With weight ratio is that petroleum coke and the NaOH (0.5 kilogram of gross weight) of 1:10 mixes, and is raised to 850 ℃ from room temperature in 100 liters of/hour N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 1000 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of sodium metal in this course of reaction.
Embodiment 7
With weight ratio is that phenolic resins and the NaOH (2 kilograms of gross weights) of 1:4 mixes, and is raised to 850 ℃ from room temperature in 200 liters of/hour N2 atmosphere.The tail gas that produces in the course of reaction is fed in the water tank that holds 1000 premium on currency always, drop to after 200 ℃, stop to feed N2 up to reaction temperature.When treating in the stove that temperature drops to nearly room temperature, take out product, carry out washing and drying and promptly get super-activated carbon.There is not the how effusion of sodium metal in this course of reaction.
Claims (3)
1, the potassium that produces in a kind of elimination activity charcoal preparation process, the method for sodium vapor is characterized in that comprising the steps:
With weight ratio is that the contain carbon precursor and KOH or NaOH of 1:1-10 mixes, with per kilogram contain the charcoal precursor need the 100-1000 liter/hour inert atmosphere exist down, being raised to 800-1000 ℃ from room temperature activates, activate 0.5-2 hour, in this activation process, the tail gas feeding that reaction is produced fills in the water tank of aqueous water, until reaction finishes to stop to feed inert atmosphere when the back temperature drops to 200 ℃; Wherein aqueous water is the 1500-3000 liter with the proportioning that contains the charcoal precursor: 1 kilogram.
2, the potassium that produces in a kind of elimination activity charcoal preparation process as claimed in claim 1, the method for sodium vapor is characterized in that the described carbide that carbon precursor is petroleum coke, needle coke, coal, various plant housing or resin that contains.
3, the potassium that produces in a kind of elimination activity charcoal preparation process as claimed in claim 1, the method for sodium vapor is characterized in that described inert atmosphere is nitrogen or argon gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100736832A CN101496988A (en) | 2009-01-19 | 2009-01-19 | Method for eliminating potassium and sodium vapor in process for preparing active carbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100736832A CN101496988A (en) | 2009-01-19 | 2009-01-19 | Method for eliminating potassium and sodium vapor in process for preparing active carbon |
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| CN101496988A true CN101496988A (en) | 2009-08-05 |
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| CNA2009100736832A Pending CN101496988A (en) | 2009-01-19 | 2009-01-19 | Method for eliminating potassium and sodium vapor in process for preparing active carbon |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2474911A (en) * | 2009-10-30 | 2011-05-04 | Goodrich Corp | Metal impurity removal from gaseous stream |
-
2009
- 2009-01-19 CN CNA2009100736832A patent/CN101496988A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2474911A (en) * | 2009-10-30 | 2011-05-04 | Goodrich Corp | Metal impurity removal from gaseous stream |
| US8771623B2 (en) | 2009-10-30 | 2014-07-08 | Goodrich Corporation | Methods and apparatus for residual material management |
| GB2474911B (en) * | 2009-10-30 | 2016-01-13 | Goodrich Corp | Methods and apparatus for residual material management |
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Open date: 20090805 |