CN104773731A - Method for preparing active carbon by using multi-hearth furnace - Google Patents
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Abstract
The invention relates to a method for preparing active carbon by using a multi-hearth furnace. The method comprises the following steps: 1) inputting a raw material from the feeding end on the top of the multi-hearth furnace into the multi-hearth furnace; 2) starting a combustor in the bottom of the multi-hearth furnace to heat the raw material, wherein the temperature of the raw material in the furnace layer in the bottom of the multi-hearth furnace is raised to be not less than 600 DEG C in the first place to reach an activating temperature; 3) introducing water vapor into the multi-hearth furnace, wherein the raw material reaching the activating temperature and water vapor which are overturned by virtue of a rabble blade are uniformly contacted to carry out gas-solid heterogeneous activating reaction to generate combustible gases H2 and CO; 4) generating a negative pressure by using an induced draft fan to control the flowing directions of H2 and CO, wherein the H2 and CO move upward from the bottom of the multi-hearth furnace; 5) injecting air into the multi-hearth furnace, wherein exothermic reaction is carried out on H2 and CO and oxygen in air, and released heat is taken as heat required for carrying out gas-solid heterogeneous activating reaction on the raw material and water vapor; and 6) forming active carbon after activating reaction of the raw material, wherein the active carbon is discharged from a discharge opening in the bottom of the multi-hearth furnace. The method provided by the invention can be widely applied to processes for preparing active carbon.
Description
Technical field
The present invention relates to a kind of method preparing gac, particularly about a kind of method utilizing multiple hearth furnace to prepare gac.
Background technology
Gac a kind ofly has flourishing pore texture and the artificial Carbon Materials goods compared with bigger serface, main application be gas absorption be separated, and drink water purification etc., be widely used in fields such as chemical industry, food, medicine and environmental protection, particularly at field of Environment Protection, activated carbon product has huge market capacity.
At present, the Environmental Protection Situation of China is more and more severeer, and the unordered discharge from the haze of puzzlement China main cities circle to industrial sewage, the continuous decline of drinking quality relate to gas cleaning, air filtration, Industrial Waste Water Treatments and drinking water deep purification invariably.Along with national environmental protection regulation is more and more stricter, the requirement of the people to quality of the life is also more and more higher, and these all facilitate the expansion in activated carbon product market.
Prepare the hot procedure of gac it is crucial that the reactivation process of carbonized material.The activation that multiple hearth furnace may be used for gac is produced, compared with other activation equipment, multiple hearth furnace production capacity is larger, maximum production capacity can reach 10000 tons/year, extensive benefit can be produced, and automatization in gac process is produced in multiple hearth furnace activation, mechanization degree is high, workman's work load is low, and production environment is good.Multiple hearth furnace needs under certain temperature condition, pass into water vapor and carries out priming reaction in activation production process, but the priming reaction of water vapor and charcoal is thermo-negative reaction, therefore needs to open the temperature that burner maintains burner hearth.At present, in order to maintain the temperature of reaction in burner hearth, needing a large amount of burner opened in burner hearth to maintain furnace temperature, the fluctuation of inner of the boiler chamber temperature can be caused like this, larger to the qualitative effects producing gac; The more important thing is in production process and add firing rate, add the quantity discharged of waste gas simultaneously, neither energy-conservation also not environmentally.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of continuous prodution that can realize gac, and the multiple hearth furnace that utilizes that in production process, temperature fluctuation is little, firing rate is few prepares the method for gac.
For achieving the above object, the present invention takes following technical scheme: a kind of method utilizing multiple hearth furnace to prepare gac, comprises the following steps:
1) raw material is dropped into multiple hearth furnace from its top feed end of multiple hearth furnace inner, open the middle axis drive motor of multiple hearth furnace, drive the rake teeth in rake arms to stir raw material by axis, the blanking port of raw material to each stove layer is promoted to make raw material enter each stove layer of multiple hearth furnace;
2) burner bottom multiple hearth furnace is opened, temperature in multiple hearth furnace raises, raw material is heated gradually, and the material temperature in multiple hearth furnace bottom oven layer is elevated to more than 600 DEG C at first, Gu reach raw material and the activation temperature needed for water vapour generation gas-heterogeneous priming reaction;
3) in multiple hearth furnace, pass into water vapour, reach the raw material of activation temperature and water vapour in multiple hearth furnace bottom oven layer and constantly stir lower uniform contact at rake teeth, solid gas-heterogeneous priming reaction generation inflammable gas H occurs
2and CO, Gu gas-heterogeneous priming reaction is thermo-negative reaction, concrete reaction formula is as follows:
C(s)+H
2O(g)→H
2(g)+CO(g)；ΔH＝+131.5MJ/kmol；
C(s)+2H
2O(g)→H
2(g)+CO
2(g)；ΔH＝+90.0MJ/kmol；
C(s)+CO
2(g)→2CO(g)；ΔH＝+162.4MJ/kmol；
4) negative pressure is produced to inflammable gas H by induced draft fan
2control with the flow direction of CO, make inflammable gas H
2moved upward by the bottom oven layer of multiple hearth furnace with CO;
5) air is sprayed to each stove layer in multiple hearth furnace, inflammable gas H
2with the oxygen generation thermopositive reaction in CO and air, liberated heat maintains the temperature of each stove layer in multiple hearth furnace, Gu as the heat needed for raw material and water vapour generation gas-heterogeneous priming reaction, and inflammable gas H
2as follows with the concrete reaction formula of the oxygen in CO and air:
H
2(g)+1/2O
2(g)→H
2O(g)；ΔH＝-241.8MJ/kmol；
CO(g)+1/2O
2(g)→CO
2(g)；ΔH＝-285.6MJ/kmol；
6) raw material forms gac after each stove layer generation priming reaction, and gac draws off from the bottom discharge mouth of multiple hearth furnace.
Described step 1) in, raw material is feed coal or ature of coal carbonized material or carbo lignius material or fruit shell carbon material or moulds fat carbonized material or asphalt carbon material or waste active carbon.
Described step 1) in, the particle size range of raw material is 1mm ~ 50mm.
Described step 5) in, Gu the inflammable gas H produced after each stove layer Raw and water vapour generation gas-heterogeneous priming reaction in multiple hearth furnace
2with CO first in this stove layer and the oxygen generation thermopositive reaction of spraying in the air that enters, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer; At the inflammable gas H that this stove layer is not consumed
2with the upper direction of CO to multiple hearth furnace, in its stove layer arrived and the oxygen generation thermopositive reaction of spraying in the air that enters, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer.
Temperature in the bottom oven layer of multiple hearth furnace is controlled by burner and water vapor intake, and in multiple hearth furnace except bottom oven layer, the temperature in other stove layer is controlled by air spray amount and water vapor intake; Wherein, in each stove layer of multiple hearth furnace, the quality of water vapor intake and multiple hearth furnace raw material input amount is 0:1 ~ 1.5:1 than scope, and the mass ratio that in multiple hearth furnace, water vapor passes into total amount and multiple hearth furnace raw material input amount is no more than 2.5:1; In each stove layer of multiple hearth furnace, the quality control clearance of air intake and multiple hearth furnace raw material input amount is 0:1 ~ 2:1, and the mass ratio that in multiple hearth furnace, air passes into total amount and multiple hearth furnace raw material input amount is no more than 6:1.
Produce negative pressure by induced draft fan to control utilizing multiple hearth furnace to prepare the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after dust-removal and desulfurizing process.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention makes the raw material bottom multiple hearth furnace first reach activation temperature owing to adopting only unlatching multiple hearth furnace combustion bottom burner, with water vapour generation priming reaction, the inflammable gas that recycling priming reaction produces and air generation thermopositive reaction liberated heat maintain the temperature of each stove layer in multiple hearth furnace, Gu as the heat needed for raw material and water vapour generation gas-heterogeneous priming reaction, not only reduce the consumption of fuel, and reduce the discharge of pollutent.2, the present invention only opens multiple hearth furnace combustion bottom burner owing to adopting, the heat that the gas fuel burning that main dependence priming reaction produces produces maintains the fire box temperature of multiple hearth furnace, under the condition of not feed change character, in multiple hearth furnace, temperature fluctuation range is less, processing condition in multiple hearth furnace remain comparatively stable, burner can not be opened in multiple hearth simultaneously, cause the air of injection and water vapor disorderly at multiple hearth flow field, make temperature fluctuation in multiple hearth larger, cause manufacturing condition to be difficult to control, product property fluctuation is larger.3, the present invention is owing to can, according to Production requirement by the temperature composition regulating air spray amount and water vapor intake accurately to control each stove layer in multiple hearth furnace, can be used for producing the sorbing material products such as high-end gac.In sum, the present invention can be widely used in preparing in activated carbon process.
Accompanying drawing explanation
Fig. 1 utilizes six layers of multiple hearth furnace to prepare the schematic diagram of gac in the present invention;
Fig. 2 utilizes 17 layers of multiple hearth furnace prepare gac and utilize six layers of multiple hearth furnace to prepare the corresponding diagram of gac in the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The invention provides a kind of method utilizing multiple hearth furnace to prepare gac, comprise the following steps:
1) raw material is dropped into multiple hearth furnace from its top feed end of multiple hearth furnace inner, open the middle axis drive motor of multiple hearth furnace, drive the rake teeth in rake arms constantly stir raw material and promoted by the blanking port of raw material to each stove layer by axis, make raw material enter each stove layer of multiple hearth furnace.
Wherein, raw material can be feed coal, ature of coal carbonized material, carbo lignius material, fruit shell carbon material, mould fat carbonized material, asphalt carbon material or waste active carbon; The particle size range of raw material is 1mm ~ 50mm.
2) burner bottom multiple hearth furnace is opened, temperature in multiple hearth furnace raises, raw material is heated gradually, and the material temperature in multiple hearth furnace bottom oven layer is elevated to more than 600 DEG C at first, Gu reach raw material and the activation temperature needed for water vapour generation gas-heterogeneous priming reaction.
3) in multiple hearth furnace, pass into water vapour, reach the raw material of activation temperature and water vapour in multiple hearth furnace bottom oven layer and constantly stir lower uniform contact at rake teeth, solid gas-heterogeneous priming reaction generation inflammable gas H occurs
2and CO, Gu gas-heterogeneous priming reaction is thermo-negative reaction, concrete reaction formula is as follows:
C(s)+H
2O(g)→H
2(g)+CO(g)；ΔH＝+131.5MJ/kmol (1)
C(s)+2H
2O(g)→H
2(g)+CO
2(g)；ΔH＝+90.0MJ/kmol (2)
C(s)+CO
2(g)→2CO(g)；ΔH＝+162.4MJ/kmol (3)
4) negative pressure is produced to inflammable gas H by induced draft fan
2control with the flow direction of CO, make inflammable gas H
2moved upward by the bottom oven layer of multiple hearth furnace with CO.
5) air is sprayed to each stove layer in multiple hearth furnace, inflammable gas H
2with the oxygen generation thermopositive reaction in CO and air, liberated heat maintains the temperature of each stove layer in multiple hearth furnace, Gu as the heat needed for raw material and water vapour generation gas-heterogeneous priming reaction.Inflammable gas H
2as follows with the concrete reaction formula of the oxygen in CO and air:
H
2(g)+1/2O
2(g)→H
2O(g)；ΔH＝-241.8MJ/kmol (4)
CO(g)+1/2O
2(g)→CO
2(g)；ΔH＝-285.6MJ/kmol (5)
Wherein, Gu the inflammable gas H produced after each stove layer Raw and water vapour generation gas-heterogeneous priming reaction
2first occurs such as formula the thermopositive reaction shown in (4), (5) at this stove layer and the oxygen sprayed in the air that enters with CO, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer; At the inflammable gas H that this stove layer is not consumed
2with the upper direction of CO to multiple hearth furnace, in the stove layer generation thermopositive reaction that it arrives, Gu for this stove layer supply raw materials and water vapour generation gas-heterogeneous priming reaction required for heat.
6) raw material forms gac after each stove layer generation priming reaction, and gac draws off from the bottom discharge mouth of multiple hearth furnace.
In above-described embodiment, the temperature in the bottom oven layer of multiple hearth furnace is controlled by burner and water vapor intake, and the temperature in other stove layer of multiple hearth furnace is controlled by air spray amount and water vapor intake.Temperature in water vapor intake and multiple hearth furnace is inversely proportional to, and air spray amount is directly proportional to the temperature in multiple hearth.Wherein, in each stove layer of multiple hearth furnace, the quality of water vapor intake and multiple hearth furnace raw material input amount is 0:1 ~ 1.5:1 than scope, and the mass ratio that in multiple hearth furnace, water vapor passes into total amount and multiple hearth furnace raw material input amount is no more than 2.5:1; In each stove layer of multiple hearth furnace, the quality control clearance of air intake and multiple hearth furnace raw material input amount is 0:1 ~ 2:1, and the mass ratio that in multiple hearth furnace, air passes into total amount and multiple hearth furnace raw material input amount is no more than 6:1.
In above-described embodiment, produce negative pressure by induced draft fan to control utilizing multiple hearth furnace to prepare the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after the process such as dust-removal and desulfurizing.Embodiment 1
As shown in Figure 1, adopt the inventive method to utilize existing six layers of multiple hearth furnace 1 to prepare the method for gac, comprise the following steps:
1) feed coal is dropped into six layers of multiple hearth furnace inside from its top feed end 2 of six layers of multiple hearth furnace 1, feed coal input amount is 50kg/h.Open the middle axis drive motor 3 of six layers of multiple hearth furnace 1, drive the rake teeth 5 in rake arms 4 constantly to stir feed coal by axis and the blanking port of feed coal to each stove layer is promoted to make feed coal enter each stove layer of six layers of multiple hearth furnace.
2) the second stove layer of six layers of multiple hearth furnace 1, the 4th stove layer and the 6th stove layer are respectively arranged with top burner 6, middle part burner 7 and lower burner 8, only open the lower burner 8 in the 6th stove layer, the 6th stove layer temperature in multiple hearth furnace raises, feed coal is heated gradually, feed coal temperature in 6th stove layer is elevated to more than 600 DEG C at first, Gu reach feed coal and the activation temperature needed for water vapour generation gas-heterogeneous priming reaction.
3) each stove layer of six layers of multiple hearth furnace 1 is designed with water vapor and passes into pipeline 9, the water vapour that steam evaporator 10 produces is assigned to water vapor through steam distributor 11 and passes into pipeline 9, water vapour passes into by water vapor each stove layer that pipeline 9 enters six layers of multiple hearth furnace 1, wherein, the mass ratio of feed coal input amount that water vapor passes in total amount and six layers of multiple hearth furnace 1 is 2:1; Reach the feed coal of activation temperature and water vapour in 6th stove layer and constantly stir lower uniform contact at rake teeth 5, solid gas-heterogeneous priming reaction generation inflammable gas H occurs
2and CO, priming reaction is thermo-negative reaction, and concrete reaction formula is as follows:
C(s)+H
2O(g)→H
2(g)+CO(g)；ΔH＝+131.5MJ/kmol (1)
C(s)+2H
2O(g)→H
2(g)+CO
2(g)；ΔH＝+90.0MJ/kmol (2)
C(s)+CO
2(g)→2CO(g)；ΔH＝+162.4MJ/kmol (3)
4) negative pressure is produced to inflammable gas H by induced draft fan 12
2control with the flow direction of CO, make inflammable gas H
2moved upward by the 6th stove layer with CO.
5) each stove layer of six layers of multiple hearth furnace 1 is designed with air spray pipeline 13, spray air blower 14 and spray air by air spray pipeline 13 to each stove layer in six layers of multiple hearth furnace 1, the mass ratio of the feed coal input amount that air passes in total amount and six layers of multiple hearth furnace 1 is 5:1, the inflammable gas H in each stove layer
2with the oxygen generation thermopositive reaction in CO and air, liberated heat maintains the temperature of each stove layer in six layers of multiple hearth furnace 1, Gu as the heat needed for feed coal and water vapour generation gas-heterogeneous priming reaction.Inflammable gas H
2as follows with the concrete reaction formula of the oxygen in CO and air:
H
2(g)+1/2O
2(g)→H
2O(g)；ΔH＝-241.8MJ/kmol (4)
CO(g)+1/2O
2(g)→CO
2(g)；ΔH＝-285.6MJ/kmol (5)
Gu the inflammable gas H produced after each stove layer generation gas-heterogeneous priming reaction
2first occurs such as formula the thermopositive reaction shown in (4), (5) at this stove layer and the oxygen sprayed in the air that enters with CO, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer; At the inflammable gas H that this stove layer is not consumed
2with the upper direction of CO to six layers of multiple hearth furnace 1, in the stove layer generation thermopositive reaction that it arrives, Gu for this stove layer supply raw materials and water vapour generation gas-heterogeneous priming reaction required for heat.
6) raw material forms gac after each stove layer generation priming reaction, and gac draws off from the bottom discharge mouth of six layers of multiple hearth furnace 1, lowers the temperature through cooling drum.
Wherein, produce negative pressure by induced draft fan to control preparing the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after the process such as dust-removal and desulfurizing.
The multiple hearth furnace of the use in the inventive method can be the various multiple hearth furnace devices of output and burner hearth different amts.As shown in Figure 2,17 layers of multiple hearth furnace 15 are, from the 3rd stove layer, the odd number stove layer the 17 stove layer is provided with burner, the burner of 17 layers of multiple hearth furnace 15 is divided into top burner, middle part burner and lower burner by corresponding six layers of multiple hearth furnace 1, wherein the burner of the second stove layer of the corresponding six layers of multiple hearth furnace of the burner of the 3rd stove layer, the 5th stove layer and the 7th stove layer, is top burner 6; The burner of the 4th stove layer of the corresponding six layers of multiple hearth furnace of burner of the 9th stove layer, the 11 stove layer and the 13 stove layer is middle part burner 7; The burner of the 6th stove layer of the corresponding six layers of multiple hearth furnace of burner of the 15 stove layer, the 17 stove layer is lower burner 8.
The various embodiments described above are only for illustration of the present invention; wherein the structure of each parts, mode of connection and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. utilize multiple hearth furnace to prepare a method for gac, comprise the following steps:
1) raw material is dropped into multiple hearth furnace from its top feed end of multiple hearth furnace inner, open the middle axis drive motor of multiple hearth furnace, drive the rake teeth in rake arms to stir raw material by axis, the blanking port of raw material to each stove layer is promoted to make raw material enter each stove layer of multiple hearth furnace;
2) burner bottom multiple hearth furnace is opened, temperature in multiple hearth furnace raises, raw material is heated gradually, and the material temperature in multiple hearth furnace bottom oven layer is elevated to more than 600 DEG C at first, Gu reach raw material and the activation temperature needed for water vapour generation gas-heterogeneous priming reaction;
3) in multiple hearth furnace, pass into water vapour, reach the raw material of activation temperature and water vapour in multiple hearth furnace bottom oven layer and constantly stir lower uniform contact at rake teeth, solid gas-heterogeneous priming reaction generation inflammable gas H occurs
2and CO, Gu gas-heterogeneous priming reaction is thermo-negative reaction, concrete reaction formula is as follows:
C(s)+H
2O(g)→H
2(g)+CO(g)；ΔH＝+131.5MJ/kmol；
C(s)+2H
2O(g)→H
2(g)+CO
2(g)；ΔH＝+90.0MJ/kmol；
C(s)+CO
2(g)→2CO(g)；ΔH＝+162.4MJ/kmol；
4) negative pressure is produced to inflammable gas H by induced draft fan
2control with the flow direction of CO, make inflammable gas H
2moved upward by the bottom oven layer of multiple hearth furnace with CO;
5) air is sprayed to each stove layer in multiple hearth furnace, inflammable gas H
2with the oxygen generation thermopositive reaction in CO and air, liberated heat maintains the temperature of each stove layer in multiple hearth furnace, Gu as the heat needed for raw material and water vapour generation gas-heterogeneous priming reaction, and inflammable gas H
2as follows with the concrete reaction formula of the oxygen in CO and air:
H
2(g)+1/2O
2(g)→H
2O(g)；ΔH＝-241.8MJ/kmol；
CO(g)+1/2O
2(g)→CO
2(g)；ΔH＝-285.6MJ/kmol；
6) raw material forms gac after each stove layer generation priming reaction, and gac draws off from the bottom discharge mouth of multiple hearth furnace.
2. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 1, it is characterized in that: described step 1) in, raw material is feed coal or ature of coal carbonized material or carbo lignius material or fruit shell carbon material or moulds fat carbonized material or asphalt carbon material or waste active carbon.
3. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 1, is characterized in that: described step 1) in, the particle size range of raw material is 1mm ~ 50mm.
4. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 2, is characterized in that: described step 1) in, the particle size range of raw material is 1mm ~ 50mm.
5. a kind of method utilizing multiple hearth furnace to prepare gac according to any one of Claims 1 to 4, it is characterized in that: described step 5) in, Gu the inflammable gas H produced after each stove layer Raw and water vapour generation gas-heterogeneous priming reaction in multiple hearth furnace
2with CO first in this stove layer and the oxygen generation thermopositive reaction of spraying in the air that enters, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer; At the inflammable gas H that this stove layer is not consumed
2with the upper direction of CO to multiple hearth furnace, in its stove layer arrived and the oxygen generation thermopositive reaction of spraying in the air that enters, Gu supply raw materials and heat required for water vapour generation gas-heterogeneous priming reaction for this stove layer.
6. a kind of method utilizing multiple hearth furnace to prepare gac according to any one of Claims 1 to 4, it is characterized in that: the temperature in the bottom oven layer of multiple hearth furnace is controlled by burner and water vapor intake, in multiple hearth furnace except bottom oven layer, the temperature in other stove layer is controlled by air spray amount and water vapor intake; Wherein, in each stove layer of multiple hearth furnace, the quality of water vapor intake and multiple hearth furnace raw material input amount is 0:1 ~ 1.5:1 than scope, and the mass ratio that in multiple hearth furnace, water vapor passes into total amount and multiple hearth furnace raw material input amount is no more than 2.5:1; In each stove layer of multiple hearth furnace, the quality control clearance of air intake and multiple hearth furnace raw material input amount is 0:1 ~ 2:1, and the mass ratio that in multiple hearth furnace, air passes into total amount and multiple hearth furnace raw material input amount is no more than 6:1.
7. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 5, it is characterized in that: the temperature in the bottom oven layer of multiple hearth furnace is controlled by burner and water vapor intake, in multiple hearth furnace except bottom oven layer, the temperature in other stove layer is controlled by air spray amount and water vapor intake; Wherein, in each stove layer of multiple hearth furnace, the quality of water vapor intake and multiple hearth furnace raw material input amount is 0:1 ~ 1.5:1 than scope, and the mass ratio that in multiple hearth furnace, water vapor passes into total amount and multiple hearth furnace raw material input amount is no more than 2.5:1; In each stove layer of multiple hearth furnace, the quality control clearance of air intake and multiple hearth furnace raw material input amount is 0:1 ~ 2:1, and the mass ratio that in multiple hearth furnace, air passes into total amount and multiple hearth furnace raw material input amount is no more than 6:1.
8. a kind of method utilizing multiple hearth furnace to prepare gac according to any one of Claims 1 to 4 or 7, it is characterized in that: produce negative pressure by induced draft fan and control utilizing multiple hearth furnace to prepare the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after dust-removal and desulfurizing process.
9. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 5, it is characterized in that: produce negative pressure by induced draft fan and control utilizing multiple hearth furnace to prepare the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after dust-removal and desulfurizing process.
10. a kind of method utilizing multiple hearth furnace to prepare gac as claimed in claim 6, it is characterized in that: produce negative pressure by induced draft fan and control utilizing multiple hearth furnace to prepare the tail gas produced in the process of gac, tail gas is made to enter afterburner or incinerator by combustible combustion totally, the high-temperature flue gas supply residual heat boiler for exchanging heat produced produces steam, and the flue gas after cooling is by entering air after dust-removal and desulfurizing process.
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| CN111302338A (en) * | 2020-04-08 | 2020-06-19 | 西安热工研究院有限公司 | Equipment and method for preparing amorphous desulfurization and denitrification active coke by one-step method |
| CN112076719A (en) * | 2020-08-17 | 2020-12-15 | 北京航天环境工程有限公司 | Improved multi-hearth furnace for activated carbon regeneration and application |
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| CN105524633A (en) * | 2016-02-04 | 2016-04-27 | 辛集市远翔环保能源科技有限公司 | Multilayer continuous carbonization furnace |
| CN105800609A (en) * | 2016-03-09 | 2016-07-27 | 太原理工大学 | Active carbon activation method of hydrogen burning water vapor activation furnace |
| CN105800608A (en) * | 2016-03-09 | 2016-07-27 | 太原理工大学 | Hydrogen burning water vapor activation furnace |
| CN105692614A (en) * | 2016-03-31 | 2016-06-22 | 神华集团有限责任公司 | Multistage-rake-furnace-based activation method of coal-base activated carbon |
| CN107270709A (en) * | 2017-06-14 | 2017-10-20 | 株洲冶炼集团股份有限公司 | A kind of multiple hearth furnace |
| CN110117011A (en) * | 2019-06-10 | 2019-08-13 | 新疆鑫力环保科技有限公司 | A kind of method that physical method prepares active carbon |
| CN110117013A (en) * | 2019-06-10 | 2019-08-13 | 新疆鑫力环保科技有限公司 | A kind of active carbon preparation system |
| CN110846055A (en) * | 2019-10-24 | 2020-02-28 | 东南大学 | Single-cavity internal heating type rotary furnace biomass carbonization co-production combustible gas device and method |
| CN110846055B (en) * | 2019-10-24 | 2021-07-27 | 东南大学 | Single-cavity internal heating type rotary furnace biomass carbonization co-production combustible gas device and method |
| CN111302338A (en) * | 2020-04-08 | 2020-06-19 | 西安热工研究院有限公司 | Equipment and method for preparing amorphous desulfurization and denitrification active coke by one-step method |
| CN111302338B (en) * | 2020-04-08 | 2023-08-01 | 西安热工研究院有限公司 | Equipment and method for preparing amorphous desulfurization and denitrification active coke by one-step method |
| CN112076719A (en) * | 2020-08-17 | 2020-12-15 | 北京航天环境工程有限公司 | Improved multi-hearth furnace for activated carbon regeneration and application |
| CN114534705A (en) * | 2022-02-07 | 2022-05-27 | 天津天一爱拓科技有限公司 | Multi-hearth furnace activated carbon regeneration system and method |
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