CN108046255A - A kind of method that activated carbon is prepared using CFB fly ash and fine coal - Google Patents
A kind of method that activated carbon is prepared using CFB fly ash and fine coal Download PDFInfo
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- CN108046255A CN108046255A CN201810063348.3A CN201810063348A CN108046255A CN 108046255 A CN108046255 A CN 108046255A CN 201810063348 A CN201810063348 A CN 201810063348A CN 108046255 A CN108046255 A CN 108046255A
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- activated carbon
- carbonized material
- coal
- fine coal
- fly ash
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Abstract
The present invention relates to a kind of methods that activated carbon is prepared using CFB fly ash and fine coal.The method includes the steps：CFB fly ash, fine coal are uniformly mixed, and fine grinding, obtain mixture；Mixture obtains carbonized material through charing process；Binding agent is added in into carbonized material, is mixed in a heated condition, kneading, is molded afterwards, drying process, obtains shaping carbonized material；Shaping carbonized material is sent into activation device, and water vapour is passed through into activation device, water vapour carries out activation process to shaping carbonized material, obtains activated carbon.In the method for the present invention, CFB fly ash can be directly used for preparing activated carbon without flotation, realize the recycling of flying dust, and reduce the manufacturing cost of activated carbon, also, the present invention can also prepare activated carbon using fluid bed for the fine coal that coal measures system generates, realize the recycling treatment of flyash, the later stage load of dust remove of fluid bed is reduced, reduces operating cost, equipment operation is simpler.
Description
Technical field
The present invention relates to field of Environment Protection, and in particular to a kind of method that activated carbon is prepared using CFB fly ash and fine coal.
Background technology
Fluidized gasification technology has the advantages that wide coal adaptability, reduced investment, quick etc., is the development of coal transformation technology
Important directions.Contain the flying dust that a large amount of phosphorus content are higher, the grain size of these flying dusts in the coal gas that fluidized gasification technology generates
It is very small, efficiency of carbon con version in gasification furnace is caused to reduce, the waste of the energy can be not only caused, also pollute the environment, harmful to human is good for
Health.
At present, the comprehensive utilization of flying dust is mainly used as building materials, and the requirement to phosphorus content is stringenter, standard《GB/
T1596-2017 is used for the fine coal in cement and concrete》Regulation, the phosphorus content of grade III Standard must not exceed 10%, and fluid bed
The phosphorus content of flying dust provides considerably beyond standard generally more than 30%, therefore is difficult to construction material.
The processing method of the higher flying dust of phosphorus content mainly has：It is directly entered pulverized coal boiler burning, blending fine coal aftershaping
Reenter stove burning, dinectly bruning lime stone, flying dust flotation recycling carbon etc..Since the grain size of flying dust in itself is smaller, directly enter stove combustion
The residence time is short after burning, and combustion efficiency is undesirable, and combustibility is poor.Flying dust blending fine coal aftershaping is reentered into stove burning needs
More energy and binding agent are consumed, is unfavorable for energy-saving and emission-reduction.The general condition that calcined limestone is not had with gas producer,
Cause flying dust that can not use, waste of resource.Flying dust flotation recycling carbon technique needs to consume substantial amounts of industrial chemicals and the energy, handles
It is of high cost, it is unfavorable for energy-saving and emission-reduction, also, adaptability is poor, and recycling yield depends on the wellability of particle.Therefore, fluid bed
Flying dust there is no the practical processing method being simple and efficient at present, and the processing of flying dust annoyings user, influences fluid bed always
It promotes the use of.
If the fine coal for the small particle that fluidized gasification process generates into that can increase operation difficulty in gasification furnace, may be led
It causes furnace temperature out of control or even stops production.Meanwhile small particle raw material enters stove and can increase carry-over, reduces efficiency of carbon con version, causes dedusting system
Load of uniting increases.Therefore, it is necessary to strictly control the particle diameter distribution into stove fine coal, small particle fine coal is isolated as preparing and is lived
The raw material of property charcoal, utilizes to greatest extent so as to fulfill non-renewable resources.
At present, flyash is first mainly recycled into carbon by flotation, then using coal ash for manufacturing in the method for activated carbon
Activated processing obtains active carbon finished products again, and the technology chain of whole process is longer, it is necessary to chemical agent, production cost is higher, and
And chemical agent is needed, secondary pollution is be easy to cause, is unfavorable for environmental protection.
And it can be efficiently used when preparing activated carbon using flying dust in CFB fly ash particle there are substantial amounts of pore structure
The pore structure of itself, while reduce the consumption to coal or biomass material.Flying dust as a kind of solid waste, to its into
Row recycling treatment not only conforms with environmental requirement, and can realize economic benefit, realizes industrial processes zero-emission.
The content of the invention
In view of in the prior art during the processing such as CFB fly ash, fine coal there are the problem of, and make full use of fluidisation
Bed flying dust has the characteristic of hole framework in itself, and the present invention proposes a kind of prepares activated carbon using CFB fly ash and fine coal
Method the method achieve the recycling of CFB fly ash and fine coal, reduce operating cost, improves energy utilization
Rate.
The present invention provides a kind of method that activated carbon is prepared using CFB fly ash and fine coal, including step：It will fluidisation
Bed flying dust, fine coal are uniformly mixed, and fine grinding, obtain mixture；The mixture obtains carbonized material through charing process；To described
Binding agent is added in carbonized material, is mixed in a heated condition, kneading, is molded afterwards, drying process, obtains forming charcoal
Material；The shaping carbonized material is sent into activation device, and water vapour, the water vapour pair are passed through into the activation device
The shaping carbonized material carries out activation process, obtains activated carbon.
Further, in the mixture, the weight proportion of the CFB fly ash and fine coal is：0.5~3.5:1.
As the preferred embodiment of the present invention, the fine coal generates for fluid bed for coal measures system, the grain of the fine coal
Footpath is less than 2mm.
Further, grain size≤100 μm of the mixture obtained after fine grinding processing.
As the preferred embodiment of the present invention, the condition control of the charing process process is：Heating rate 3~15
DEG C/min, 450~550 DEG C of carbonization temperature, 0.5~1.5h of carbonization time.
As the preferred embodiment of the present invention, the binding agent selects water and coal tar.
Further, the water and the weight proportion of coal tar added in the carbonized material is：Carbonized material：Water：Coal tar=
1:0.5:0.3~1.
As the preferred embodiment of the present invention, be passed through into the activation device rate of the water vapour for 1.1~
1.5kg/h。
Further, the temperature of the activation process is 750~900 DEG C, and soak time is 3~5h.
As the preferred embodiment of the present invention, the water vapour is generated by fluidized gasification process.
The method that the fine coal proposed by the present invention generated using CFB fly ash and standby coal measures system prepares activated carbon, fully profit
With in CFB fly ash particle, there are the characteristics of a large amount of pore structures.In this method, CFB fly ash can be straight without flotation
It connects and is used to prepare activated carbon, significantly reduce the manufacturing cost of activated carbon, realize the recycling of flying dust, realize industrial mistake
Journey zero-emission, and add economic benefit.
The present invention prepares activated carbon for the fine coal of coal measures system generation by the use of fluid bed as one of raw material, not only realizes
The recycling treatment of fine coal also reduces the later stage load of dust remove of fluid bed, reduces operating cost, and equipment operation is simpler, and
It ensure that the macrocyclic operation of safety and stability of equipment.Meanwhile the water vapour that fluidized gasification process generates can be directly used for living
Change process as activator, improves capacity usage ratio, realizes Xun Huan inside heat.
Description of the drawings
Fig. 1 is the method flow schematic diagram provided by the invention that activated carbon is prepared using CFB fly ash and fine coal.
Specific embodiment
Below in conjunction with drawings and examples, the specific embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
Example is applied to be for illustrative purposes only rather than limitation of the present invention.
As shown in Figure 1, illustrate for the method flow provided by the invention that activated carbon is prepared using CFB fly ash and fine coal
Figure, includes the following steps：
(1) dispensing
CFB fly ash, fine coal are uniformly mixed, and fine grinding, obtain mixture.Preferably, fine coal is fluid bed for coal measures
Caused by system, the particle of 2mm is then less than through screening obtained grain size.
Fine grinding process, grain size≤100 μm of the mixture controlled, convenient for subsequently carrying out sufficient charing process.
Preferably, the phosphorus content for the CFB fly ash that the present invention utilizes is 25~40wt% (wt% is mass percent).
In this step, since different types of coal are in the difference of flying dust and fine coal caused by fluidized gasification process, and it is not required to
Concrete restriction is done to the weight proportion of CFB fly ash in mixture and fine coal, to ensure the abundant profit of CFB fly ash and fine coal
Subject to, to realize the effect of the solid waste zero-emission of the present invention.
As the preferred embodiment of the present invention, in mixture, the weight proportion control of CFB fly ash and fine coal is：
0.5~3.5:1.
(2) carbonize
Charing process is carried out to the mixture that above-mentioned steps obtain, obtains carbonized material.Wherein, the technique of charing process process
Condition controls：3~15 DEG C/min of heating rate, 450~550 DEG C of carbonization temperature, 0.5~1.5h of carbonization time.
(3) kneading, shaping
Binding agent is added in into above-mentioned carbonized material, and is mixed in a heated condition, kneading, is molded, done afterwards
Dry processing obtains shaping carbonized material.In the step, binding agent selects water and coal tar or selects humic acid.
When binding agent selects water and coal tar, the weight proportion for being molded each material in carbonized material is：Carbonized material：Water：Coal
Tar=1：0.5：0.3~1.
(4) activate
Above-mentioned shaping carbonized material is sent into activation device, and water vapour is passed through into activation device, water vapour is to shaping
Carbonized material carries out activation process, obtains activated carbon.Preferably, the rate for being passed through water vapour is 1.1~1.5kg/h.Also, it is passed through
Water vapour and shaping carbonized material mass ratio control for 1.1~1.5：1.
Further, the temperature control of activation process is 750~900 DEG C, and soak time is 3~5h, can be ensured
It is molded the abundant activation of carbonized material.
It is furthermore preferred that the water vapour in the step is the water vapour that fluidized gasification process generates, so as to effectively improve
The utilization rate of energy.
The iodine sorption value of activated carbon prepared by the present invention is 698~782mg/g, methylene blue adsorption value for 111~
132mg/g。
In the method proposed by the present invention for preparing activated carbon, the discarded object of fluidized gasification process generation is taken full advantage of：
Flying dust, flying dust can be directly used for preparing activated carbon, significantly reduce the manufacturing cost of activated carbon, not only realize without flotation
The recycling of flying dust realizes industrial process zero-emission, also adds economic benefit.
Meanwhile method of the invention can also prepare activated carbon using fluid bed for the fine grained fine coal that coal measures system generates,
The recycling treatment of fine coal is not only realized, also reduces the later stage load of dust remove of fluid bed, reduces operating cost, equipment operation
It is simpler, and ensure that the macrocyclic operation of safety and stability of equipment.Also, the water vapour that fluidized gasification process generates can be straight
It connects and is used as activator for activation process, improve capacity usage ratio, realize Xun Huan inside heat.
Embodiment 1
Weigh CFB fly ash 0.5kg, standby coal measures system fine coal 0.5kg add in ball mill be milled to grain size for≤100 μm with
Under, obtain mixture.It feeds the mixture into chamber type electric resistance furnace and carbonizes：In-furnace temperature is increased to 500 DEG C by 47min, and is kept
Temperature 1h, obtains carbonized material.0.4kg coal tar and the stirring of 0.5kg water are added in into carbonized material after cooling, is mixed at 60 DEG C
It closes, kneading, is then molded, drying process, obtain shaping carbonized material.Then shaping carbonized material is put into tube type resistance furnace
It is interior, and water vapour is passed through into tube type resistance furnace with the flow of 1.3kg/h, and temperature is raised to 750 DEG C of heat preservation 4h, obtain activity
Charcoal.
The iodine sorption value of activated carbon manufactured in the present embodiment is 782mg/g, methylene blue adsorption value 132mg/g.
Embodiment 2
Weigh CFB fly ash 0.5kg, standby coal measures system fine coal 0.5kg add in ball mill be milled to grain size for≤100 μm with
Under, obtain mixture.It feeds the mixture into chamber type electric resistance furnace and carbonizes：In-furnace temperature is increased to 550 DEG C by 40min, and is kept
Temperature 1h, obtains carbonized material.0.4kg coal tar and the stirring of 0.5kg water are added in into carbonized material after cooling, is mixed at 60 DEG C
It closes, kneading, is then molded, drying process, obtain shaping carbonized material.Then shaping carbonized material is put into tube type resistance furnace
It is interior, and water vapour is passed through into tube type resistance furnace with the flow of 1.3kg/h, and temperature is raised to 800 DEG C of heat preservation 4h, obtain activity
Charcoal.
The iodine sorption value of activated carbon sample manufactured in the present embodiment is 698mg/g, methylene blue adsorption value 111mg/g.
Embodiment 3
Weigh CFB fly ash 0.5kg, standby coal measures system fine coal 0.5kg add in ball mill be milled to grain size for≤100 μm with
Under, obtain mixture.It feeds the mixture into chamber type electric resistance furnace and carbonizes：Temperature in chamber type electric resistance furnace is increased to 450 by 30min
DEG C, and temperature 0.5h is kept, obtain carbonized material.0.4kg coal tar and the stirring of 0.5kg water are added in into carbonized material after cooling,
Mixing, kneading, are then molded, drying process at 50 DEG C, obtain shaping carbonized material.Shaping carbonized material is put into tubular type electricity
It hinders in stove, and water vapour is passed through into tube type resistance furnace with the flow of 1.1kg/h, and raise temperature to 800 DEG C of heat preservation 4h, obtain
Activated carbon.
The iodine sorption value of activated carbon sample manufactured in the present embodiment is 752mg/g, methylene blue adsorption value 119mg/g.
Embodiment 4
Weigh CFB fly ash 0.5kg, standby coal measures system fine coal 0.5kg add in ball mill be milled to grain size for≤100 μm with
Under, obtain mixture.It feeds the mixture into chamber type electric resistance furnace and carbonizes：Temperature in chamber type electric resistance furnace is increased to 450 by 30min
DEG C, and temperature 1.5h is kept, obtain carbonized material.0.4kg coal tar and the stirring of 0.5kg water are added in into carbonized material after cooling,
Mixing, kneading, are then molded, drying process at 50 DEG C, obtain shaping carbonized material.Shaping carbonized material is put into tubular type electricity
It hinders in stove, and water vapour is passed through into tube type resistance furnace with the flow of 1.3kg/h, and raise temperature to 900 DEG C of holding 4h, obtain
Activated carbon.
The iodine sorption value of activated carbon sample manufactured in the present embodiment is 769mg/g, methylene blue adsorption value 123mg/g.
Finally it should be noted that：Obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, can also do on the basis of the above description
Go out other various forms of variations or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out is still in the protection scope of this invention.
Claims (10)
- A kind of 1. method that activated carbon is prepared using CFB fly ash and fine coal, which is characterized in that including step：Fluid bed is flown Ash, fine coal are uniformly mixed, and fine grinding, obtain mixture；The mixture obtains carbonized material through charing process；To the charing Binding agent is added in material, is mixed in a heated condition, kneading, is molded afterwards, drying process, obtains shaping charing Material；The shaping carbonized material is sent into activation device, and water vapour is passed through into the activation device, the water vapour is to institute It states shaping carbonized material and carries out activation process, obtain activated carbon.
- 2. the method according to claim 1 for preparing activated carbon, which is characterized in that in the mixture, the fluid bed The weight proportion of flying dust and fine coal is：0.5~3.5:1.
- 3. the method according to claim 1 for preparing activated carbon, which is characterized in that the fine coal is united for fluid bed for coal measures It generates, the grain size of the fine coal is less than 2mm.
- 4. the method according to claim 1 for preparing activated carbon, which is characterized in that the institute obtained after fine grinding processing State grain size≤100 μm of mixture.
- 5. the method according to claim 1 for preparing activated carbon, which is characterized in that the condition control of the charing process process It is made as：3~15 DEG C/min of heating rate, 450~550 DEG C of carbonization temperature, 0.5~1.5h of carbonization time.
- 6. the method according to claim 1 for preparing activated carbon, which is characterized in that the binding agent selects water and coal tar Oil.
- 7. the method according to claim 6 for preparing activated carbon, which is characterized in that the water and coal added in the carbonized material The weight proportion of tar is：Carbonized material：Water：Coal tar=1:0.5:0.3~1.
- 8. the method according to claim 1 for preparing activated carbon, which is characterized in that be passed through into the activation device described The rate of water vapour is 1.1~1.5kg/h.
- 9. the method according to claim 1 for preparing activated carbon, which is characterized in that the temperature of the activation process is 750~900 DEG C, soak time is 3~5h.
- 10. the method according to claim 1 for preparing activated carbon, which is characterized in that the water vapour is by fluidized gasification Process generates.
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| CN108611147A (en) * | 2018-05-22 | 2018-10-02 | 新奥科技发展有限公司 | A kind of preparation method and formed coke of formed coke |
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| CN109384228A (en) * | 2018-11-08 | 2019-02-26 | 辽宁科技大学 | A kind of desulphurization denitration active carbon and preparation method thereof |
| CN110342511A (en) * | 2019-07-17 | 2019-10-18 | 光大环保技术研究院（南京）有限公司 | A method of active carbon quality is improved using modified flying dust |
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