CN109305681B - Process for manufacturing activated carbon by using hazardous waste activated carbon and biomass material - Google Patents
Process for manufacturing activated carbon by using hazardous waste activated carbon and biomass material Download PDFInfo
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- CN109305681B CN109305681B CN201811025356.5A CN201811025356A CN109305681B CN 109305681 B CN109305681 B CN 109305681B CN 201811025356 A CN201811025356 A CN 201811025356A CN 109305681 B CN109305681 B CN 109305681B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/336—Preparation characterised by gaseous activating agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/145—Feedstock the feedstock being materials of biological origin
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Abstract
The invention discloses a process for preparing activated carbon from hazardous waste activated carbon and biomass materials, which can simultaneously mix the hazardous waste activated carbon and the biomass materials into an activation furnace for activation, the hazardous waste activated carbon recovers the original physical and chemical properties of the activated carbon, the biomass materials are not required to be carbonized and are directly put in place in one step to prepare the activated carbon with various properties, the process has the advantages of continuous production, stable quality and good control, hazardous waste resources can be reused, the whole treatment process is about 3-5 hours and is far shorter than the time for conventionally preparing the activated carbon, water vapor is introduced and a certain amount of air is supplemented to obtain the temperature required for preparing the activated carbon, the hazardous waste activated carbon and the biomass materials can be activated to prepare the activated carbon with various qualities, the whole process for regenerating the hazardous waste and preparing the biomass materials can realize automatic control in operation and controllable in quality, and the pollution of the hazardous waste to the environment is reduced during the preparation, and the waste organic solvent which has influence on the environment is combusted, thereby saving precious resources.
Description
Technical Field
The invention relates to a process for manufacturing activated carbon, in particular to a process for manufacturing activated carbon by using hazardous waste activated carbon and biomass materials.
Background
The hazardous waste activated carbon and the biomass material are matched in an atmosphere containing hydrocarbons and a small amount of oxygen-containing comburent, the hazardous waste activated carbon contains a certain amount of organic matters and VOC and the biomass material contains a certain amount of volatile matters, so that the substances are volatilized and are combusted with a large amount of water-coal gas generated by introducing a certain amount of water vapor into a converter, and under the environment, the process temperature of 900 plus 950 ℃ required by the production of the activated carbon can be obtained, so that the activated carbon with various qualities is produced, the activity recovery of the hazardous waste activated carbon and the carbonization and activation of the biomass material are realized, and the activated carbon with various qualities is produced.
Disclosure of Invention
The invention aims to provide a process for manufacturing activated carbon by using hazardous waste activated carbon and biomass materials.
The technical scheme adopted by the invention is as follows:
the process for manufacturing the activated carbon by using the hazardous waste activated carbon and the biomass material is characterized by comprising the following steps of: the method comprises the following steps:
step 1: before the activation furnace is used, burning natural gas is firstly used for heating the activation furnace, a waste activated carbon material and biomass material feeding section, an activation section and an activated carbon discharging section are separated, and the temperature of the activation furnace is gradually increased to 400 ℃ from normal temperature;
step 2: the method comprises the following steps of (1) enabling mixed hazardous waste activated carbon and biomass materials to enter an activation section from a feed end for activation, increasing the temperature of the activation section in a furnace from 400 ℃ at an inlet to 900-1000 ℃ at an outlet, evaporating water in the hazardous waste activated carbon to form water vapor due to temperature increase, diluting the oxygen content in the furnace, taking the water vapor as a part of activated steam to participate in activation of the waste activated carbon, and enabling organic matters, VOC and volatile matters in the biomass materials to become part of fuel which participates in control combustion in the activation furnace to provide activation heat energy;
and step 3: in the step 2, when the temperature of the control point is lower, the rotating speed of the variable frequency fan is increased, the air supply amount is increased, oxygen in the air is combusted with water gas or activated carbon generated by activation in the activation section, the heat in the activation cavity is increased, and the activation temperature is raised;
and 4, step 4: in the step 2, when the temperature of the activation section is higher, the rotating speed of the variable frequency fan is reduced, the air supply amount is limited, and oxygen entering the activation cavity is reduced;
and 5: after activation is finished, the high-temperature activated carbon comes out from the discharging end, enters a spiral cooler for cooling, and then enters a packaging bag through a screening for discharging;
step 6: and (3) discharging high-temperature gas: the water gas and a small amount of carbon powder which are mainly steam, carbon dioxide, incompletely combusted water gas and a small amount of carbon powder are introduced into a secondary combustion chamber at the temperature of 1100 ℃ for complete combustion treatment, the flue gas enters a waste heat boiler to generate water vapor, and the water vapor is used as activated gas of activated carbon and is supplied to the activated carbon in an activation furnace for use;
and 7: introducing the gas after secondary combustion into a quench tower, simultaneously introducing tap water and compressed air into the quench tower to realize the cooling of high-temperature gas flow, automatically adjusting the water spray quantity according to the change of the outlet flue gas temperature to ensure that the flue gas temperature is reduced from 550 ℃ to 200 ℃ within 1 second, wherein 99% of the powdered carbon in the flue gas can be collected after passing through the quench tower, a cyclone separator and a bag-type dust collector;
and 8: and (3) introducing trace powdered carbon into a water washing alkaline washing tower along with the flue gas, further absorbing tail gas by the washed flue gas through an activated carbon adsorption tower, and finally discharging the tail gas into the atmosphere through a chimney.
In the step 3, when the added supplementary air amount is not enough to raise the furnace temperature, natural gas is automatically introduced to assist in raising the temperature.
And pure water is introduced into the waste heat boiler through the water softener, the wastewater outlet of the water softener is communicated with the circulating water tank, a water supply pump in the circulating water tank supplies water to the water washing alkaline washing tower, and the water discharged from the water washing alkaline washing tower is discharged into the circulating water tank.
The invention has the advantages that: continuous production, stable quality and good control, dangerous waste resources can be recycled, drying, roasting and activation are integrated, three stages are completed at one time, the whole treatment process is about 3-5 hours and is far lower than the time for manufacturing active carbon conventionally, the activation temperature is higher than 800 ℃, after equipment normally operates, external heat supplementation is not needed, water vapor and a certain amount of air are introduced to obtain the temperature required for manufacturing the active carbon, namely, the dangerous waste active carbon and biomass materials can be activated to manufacture the active carbon with various qualities, the whole manufacturing process can realize automatic control and controllable quality, the pollution of the dangerous waste to the environment is reduced during manufacturing, the waste organic solvent which affects the environment is combusted, and resources are saved.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
As shown in fig. 1, the process for manufacturing activated carbon by using hazardous waste activated carbon and biomass materials comprises the following steps:
step 1: before the activation furnace is used, burning natural gas is firstly used for igniting and heating, the total length of the activation furnace is about 15 meters, a waste activated carbon material and biomass material feeding section, an activation section and an activated carbon discharging section are divided, and the temperature of the activation furnace is gradually increased to 400 ℃ from normal temperature;
step 2: the method comprises the following steps of (1) enabling mixed hazardous waste activated carbon and biomass materials to enter an activation section from a feed end for activation, enabling the length of the feed section of a converter to be about 2 meters, enabling the temperature of the activation section in the converter to be increased from 400 ℃ at an inlet to 900-1000 ℃ at an outlet, and enabling water in the hazardous waste activated carbon to be evaporated into water vapor due to the temperature increase, diluting the oxygen content in the converter to be used as a part of activation steam to participate in the activation of the waste activated carbon, and enabling volatile components in organic compounds, VOC and biomass materials to be part of fuel which participates in combustion control in the activation furnace to provide activation heat energy;
and step 3: in the step 2, when the temperature of the control point is lower, the rotating speed of the variable frequency fan is increased, the air supply amount is increased, oxygen in the air is combusted with water gas or activated carbon generated by activation in the activation section, the heat in the activation cavity is increased, and the activation temperature is raised;
and 4, step 4: in the step 2, when the temperature of the activation section is higher, the rotating speed of the variable frequency fan is reduced, the air supply amount is limited, and oxygen entering the activation cavity is reduced;
and 5: after activation is finished, the high-temperature activated carbon comes out from the discharging end, enters a spiral cooler for cooling, and then enters a packaging bag through a screening for discharging;
step 6: and (3) discharging high-temperature gas: the water gas and a small amount of carbon powder which are mainly steam, carbon dioxide, incompletely combusted water gas and a small amount of carbon powder are introduced into a secondary combustion chamber at the temperature of 1100 ℃ for complete combustion treatment, the flue gas enters a waste heat boiler to generate water vapor, and the water vapor is used as activated gas of activated carbon and is supplied to the activated carbon in an activation furnace for use;
and 7: in order to meet the requirement of flue gas treatment on temperature in the subsequent stage and reduce the resynthesis of dioxins, gas after secondary combustion is introduced into a quench tower, tap water and compressed air are introduced into the quench tower, atomized water particles are fully mixed with high-temperature gas flow in the principle of the quench tower, the atomized water particles absorb heat energy from the high-temperature gas to realize the cooling of the high-temperature gas flow, a water atomization device is arranged at the top of the tower, acid-resistant filler is arranged in the middle of the tower, the water spray quantity is automatically adjusted according to the change of outlet flue gas temperature to ensure that the temperature of the flue gas is reduced from 550 ℃ to 200 ℃ within 1 second, and 99% of powder carbon in the flue gas can be collected after passing through the quench tower, a cyclone separator and a bag-type dust collector;
and 8: and (3) introducing trace powdered carbon into a water washing alkaline washing tower along with the flue gas, further absorbing tail gas by the washed flue gas through an activated carbon adsorption tower, and finally discharging the tail gas into the atmosphere through a chimney. The smoke emission system comprises an induced draft fan and a chimney, wherein the induced draft fan pumps smoke to maintain the negative pressure operation state of the hearth, the smoke which reaches the standard after purification is discharged into the atmosphere through the chimney, auxiliary facilities such as a sampling hole and a sampling platform are arranged on the chimney, a smoke online detection system is installed, the quality of smoke, sulfur dioxide, hydrogen chloride, carbon monoxide, nitric oxide, oxygen content and carbon dioxide in the discharged smoke is monitored, and the operation of the smoke purification system is controlled in a feedback mode.
And 3, when the added supplementary air amount is not enough to increase the temperature of the furnace, automatically introducing natural gas to assist in temperature increase.
And the waste heat boiler is filled with pure water through the water softener, the wastewater outlet of the water softener is communicated with the circulating water tank, a water supply pump in the circulating water tank supplies water to the water washing alkaline washing tower, and the water outlet of the water washing alkaline washing tower is discharged into the circulating water tank.
The invention has continuous production, stable quality and good control, can recycle dangerous waste resources, integrates drying, roasting and activation into a whole, completes three stages at one time, ensures that the whole treatment process is about 3-5 hours which is far lower than the time for manufacturing the active carbon conventionally, ensures that the activation temperature is more than 800 ℃, does not need external heat supplement after the equipment normally operates, and can activate the dangerous waste active carbon and biomass materials to manufacture the active carbon with various qualities by introducing water vapor and supplementing a certain amount of air to obtain the temperature required by manufacturing the active carbon.
Claims (2)
1. The process for manufacturing the activated carbon by using the hazardous waste activated carbon and the biomass material is characterized by comprising the following steps of: the method comprises the following steps:
step 1: before the activation furnace is used, burning natural gas is firstly used for heating the activation furnace, a waste activated carbon material and biomass material feeding section, an activation section and an activated carbon discharging section are used, and the temperature of the activation furnace is gradually increased to 400 ℃ from normal temperature;
step 2: the method comprises the following steps of (1) enabling mixed hazardous waste activated carbon and biomass materials to enter an activation section from a feed end for activation, increasing the temperature of the activation section in a furnace from 400 ℃ at an inlet to 900-1000 ℃ at an outlet, evaporating water in the hazardous waste activated carbon to form water vapor due to temperature increase, diluting the oxygen content in the furnace, taking the water vapor as a part of activated steam to participate in activation of the waste activated carbon, and enabling organic matters, VOC and volatile matters in the biomass materials to become part of fuel which participates in control combustion in the activation furnace to provide activation heat energy;
and step 3: in the step 2, when the temperature of the control point is lower, the rotating speed of the variable frequency fan is increased, the air supply amount is increased, oxygen in the air is combusted with water gas or activated carbon generated by activation in the activation section, the heat in the activation cavity is increased, and the activation temperature is raised;
and 4, step 4: in the step 2, when the temperature of the activation section is higher, the rotating speed of the variable frequency fan is reduced, the air supply amount is limited, and oxygen entering the activation cavity is reduced;
and 5: after activation is finished, the high-temperature activated carbon comes out from the discharging end, enters a spiral cooler for cooling, and then enters a packaging bag through a screening for discharging;
step 6: and (3) discharging high-temperature gas: the water gas and a small amount of slight carbon powder which are mainly steam, carbon dioxide, incompletely combusted water gas and a small amount of slight carbon powder are introduced into a secondary combustion chamber at 1100 ℃ for complete combustion treatment, the flue gas enters a waste heat boiler to generate water vapor, and the water vapor is used as activated gas of activated carbon and is supplied to the activated carbon in an activation furnace for use;
and 7: introducing the gas after secondary combustion into a quench tower, simultaneously introducing tap water and compressed air into the quench tower to realize the cooling of high-temperature gas flow, automatically adjusting the water spray quantity according to the change of the outlet flue gas temperature to ensure that the flue gas temperature is reduced from 550 ℃ to 200 ℃ within 1 second, wherein 99% of the powdered carbon in the flue gas can be collected after passing through the quench tower, a cyclone separator and a bag-type dust collector;
and 8: the trace powdered carbon enters a water washing alkaline washing tower along with the flue gas, the washed flue gas further absorbs tail gas through an activated carbon adsorption tower, and the tail gas is finally discharged into the atmosphere through a chimney; in the step 3, when the added supplementary air amount is not enough to raise the furnace temperature, natural gas is automatically introduced to assist in raising the temperature.
2. The process for manufacturing activated carbon from hazardous waste activated carbon and biomass material as claimed in claim 1, wherein: and pure water is introduced into the waste heat boiler through the water softener, the wastewater outlet of the water softener is communicated with the circulating water tank, a water supply pump in the circulating water tank supplies water to the water washing alkaline washing tower, and the water discharged from the water washing alkaline washing tower is discharged into the circulating water tank.
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| CN201811025356.5A CN109305681B (en) | 2018-11-30 | 2018-11-30 | Process for manufacturing activated carbon by using hazardous waste activated carbon and biomass material |
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| CN201811025356.5A CN109305681B (en) | 2018-11-30 | 2018-11-30 | Process for manufacturing activated carbon by using hazardous waste activated carbon and biomass material |
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| CN109305681B true CN109305681B (en) | 2022-02-08 |
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| CN111569851A (en) * | 2020-06-03 | 2020-08-25 | 姚正飞 | Internal heat type converter regeneration disposal device for hazardous waste powdered activated carbon |
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| CN104787762A (en) * | 2015-04-20 | 2015-07-22 | 北京神雾环境能源科技集团股份有限公司 | Method and system for producing activated carbon through pyrolysis of water-bearing organic matter |
| CN105417539A (en) * | 2016-01-17 | 2016-03-23 | 河北德谦环保科技股份有限公司 | Waste carbon recycling and regenerating system |
| CN105536705A (en) * | 2016-01-17 | 2016-05-04 | 河北德谦环保科技股份有限公司 | Waste carbon regeneration system |
| CN107282027A (en) * | 2017-07-13 | 2017-10-24 | 江西长远科技有限公司 | A kind of quick flow activation furnace activated carbon regenerating equipment and its technique |
| CN206771365U (en) * | 2017-05-10 | 2017-12-19 | 张新华 | Activated carbon regeneration furnace and hot resolution of waste material stove |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030022035A1 (en) * | 1997-11-07 | 2003-01-30 | Galloway Terry R. | Process and system for converting carbonaceous feedstocks into energy without greenhouse gas emissions |
| US20060130401A1 (en) * | 2004-12-16 | 2006-06-22 | Foster Wheeler Energy Corporation | Method of co-producing activated carbon in a circulating fluidized bed gasification process |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787762A (en) * | 2015-04-20 | 2015-07-22 | 北京神雾环境能源科技集团股份有限公司 | Method and system for producing activated carbon through pyrolysis of water-bearing organic matter |
| CN105417539A (en) * | 2016-01-17 | 2016-03-23 | 河北德谦环保科技股份有限公司 | Waste carbon recycling and regenerating system |
| CN105536705A (en) * | 2016-01-17 | 2016-05-04 | 河北德谦环保科技股份有限公司 | Waste carbon regeneration system |
| CN206771365U (en) * | 2017-05-10 | 2017-12-19 | 张新华 | Activated carbon regeneration furnace and hot resolution of waste material stove |
| CN107282027A (en) * | 2017-07-13 | 2017-10-24 | 江西长远科技有限公司 | A kind of quick flow activation furnace activated carbon regenerating equipment and its technique |
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