CN111632584A - Regeneration process of waste honeycomb activated carbon - Google Patents
Regeneration process of waste honeycomb activated carbon Download PDFInfo
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- CN111632584A CN111632584A CN202010568771.6A CN202010568771A CN111632584A CN 111632584 A CN111632584 A CN 111632584A CN 202010568771 A CN202010568771 A CN 202010568771A CN 111632584 A CN111632584 A CN 111632584A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
Abstract
The invention provides a regeneration process of waste honeycomb activated carbon, belonging to the technical field of waste treatment. It has solved the current useless active carbon direct incineration and has dealt with, has caused the extravagant scheduling problem of resource, a abandonment honeycomb active carbon regeneration technology, includes following step: the method comprises the following steps: s01: performing pyrolysis desorption, namely preheating the waste honeycomb activated carbon, and then performing pyrolysis desorption at the temperature of 500-600 ℃; s02: activating, namely activating the activated carbon subjected to thermal desorption in the step S01 by adopting water vapor at the temperature of 850-950 ℃; s03: cooling, namely cooling the activated carbon in the step S02 to obtain regenerated activated carbon; the steps S01, S02 and S03 are all performed under the condition of vacuum oxygen lack. The invention can activate and regenerate the waste active carbon.
Description
Technical Field
The invention belongs to the technical field of waste treatment, and particularly relates to a regeneration process of waste honeycomb activated carbon.
Background
Furniture manufacturing enterprises need to carry out coating in the production process, a certain amount of organic waste gas is generated in the process of using paint and related solvents, the atmospheric environment is influenced, and currently, most furniture enterprises widely adopt an activated carbon mode to treat low-concentration organic waste gas. But the activated carbon adsorption can not realize the complete degradation and elimination of the pollutants, but transfer and enrich the pollutants. In addition, the activated carbon has the characteristic of saturated adsorption, and can lose adsorption activity after being applied to pollution treatment for a certain time, and can be used as a carrier for highly enriching pollutants to form solid (dangerous) wastes again.
The waste activated carbon which is produced in the furniture industry and adsorbs organic waste gas belongs to dangerous waste, secondary environmental pollution can be caused if the waste activated carbon is not treated timely or improperly, and the treatment methods widely used for the waste activated carbon at present comprise a burning method, a landfill method and the like. At present, more disposal enterprises directly burn and dispose waste activated carbon, which causes resource waste.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a regeneration process of waste honeycomb activated carbon.
The purpose of the invention can be realized by the following technical scheme: a regeneration process of waste honeycomb activated carbon is characterized by comprising the following steps: the method comprises the following steps:
s01: performing pyrolysis desorption, namely preheating the waste honeycomb activated carbon, and then performing pyrolysis desorption at the temperature of 500-600 ℃;
s02: activating, namely activating the activated carbon subjected to thermal desorption in the step S01 by adopting water vapor at the temperature of 850-950 ℃;
s03: cooling, namely cooling the activated carbon in the step S02 to obtain regenerated activated carbon; the steps S01, S02 and S03 are all performed under the condition of vacuum oxygen lack.
Preferably, in the step SO1, the waste honeycomb activated carbon is fed into a vacuum chamber, the vacuum chamber is vacuumized and is filled with nitrogen, the vacuumized gas is filled into a secondary combustion chamber for secondary combustion treatment, then the waste honeycomb activated carbon is fed into a preheating and drying chamber for preheating, and is then fed into a desorption and regeneration chamber for pyrolysis desorption at the temperature of 500-.
Preferably, in step S02, the thermally desorbed activated carbon is sent into an activation chamber, and is flushed by positive pressure and sucked out by negative pressure, and when the pressure in the activation chamber is positive, steam is introduced into the activation chamber; when the negative pressure in the activation chamber is generated, the gas in the activation chamber is pumped out by a vacuum air pump, and the pumped gas enters a secondary combustion chamber for secondary combustion treatment.
Preferably, the flue gas generated after the secondary combustion enters an SNCR (selective non-catalytic reduction) denitration region, urea solution is sprayed into the SNCR denitration region to reduce nitrogen oxides in the flue gas into nitrogen, the flue gas passing through the SNCR denitration region indirectly preheats the materials in the preheating and drying chamber, the temperature of the flue gas after heat exchange is controlled to be 550-600 ℃, and the flue gas after heat exchange enters a tail gas treatment system.
Preferably, in step S03, the activated carbon is fed into a cooling chamber, water and nitrogen are simultaneously sprayed through a two-fluid atomization spray gun, atomized water is sprayed to absorb heat through gasification, and the temperature in the cooling chamber is reduced to 350 ℃; and then closing the two-fluid atomization spray gun, introducing nitrogen, circulating the nitrogen in the cooling chamber, reducing the temperature in the cooling chamber to 80 ℃, and directly introducing waste gas generated by the cooling chamber into a tail gas treatment system.
Preferably, the tail gas treatment system comprises a quench tower, an activated carbon/lime injection device, a bag type dust collector and an alkali type washing tower, wherein the temperature of the flue gas subjected to heat exchange is reduced to below 220 ℃ within 1s in the quench tower; then introducing the gas into an activated carbon/lime injection device, and injecting activated carbon and lime; then introducing the gas into a bag type dust collector to remove particles in the gas; and then introducing the gas into an alkali type washing tower to remove acidic substances in the gas, and finally discharging.
Preferably, the exhaust gas produced by the cooling chamber is introduced into the flue gas outlet of the quench tower.
Preferably, the gas is heated to over 1100 ℃ in the secondary combustion chamber, the residence time is over 2s, and then the combustion temperature of the second half section of the secondary combustion chamber is controlled within 950 ℃ through the action of the temperature regulating fan.
Preferably, the temperature of the flue gas after heat exchange is reduced to below 220 ℃ within 1s in the quenching tower.
Preferably, fans are used to stir the gas inside the desorption regeneration chamber and the activation chamber.
The working principle of the invention is as follows: the heating regeneration method adopted by the invention belongs to an irreversible adsorption method, and in the actual operation, high-temperature heating regeneration is adopted, and the adsorbed substances are decomposed into CO2 and H2O and then removed, so that the activated carbon is regenerated. The principle of thermal regeneration is shown in figure 2.
Compared with the prior art, the invention has the following advantages:
1. the invention aims at the waste gas honeycomb activated carbon generated by organic waste gas treatment and adopts a two-stage regeneration technology of 'pyrolysis desorption regeneration + activation regeneration'. Organic matters adsorbed in the activated carbon are desorbed through temperature rise treatment, and the adsorption capacity of the activated carbon is recovered by 80-85%. And (3) the activated carbon after the primary regeneration enters an activation regeneration chamber, steam oxidizing gas is introduced to carry out gasification reaction at the temperature of 850-950 ℃, so that residual carbide is gasified into gases such as CO2 and CO, the surface of the micropores is cleaned, and the adsorption performance of the activated carbon is recovered by more than 95%.
2. Because the molecular weight of organic substances adsorbed by the waste honeycomb activated carbon is small, the risk of explosion easily occurs in the treatment process, and a vacuum chamber is arranged before the waste honeycomb activated carbon enters the preheating drying furnace. The vacuum chamber is provided with a vacuumizing electromagnetic valve and a nitrogen gas inlet electromagnetic valve. The vacuum pump is used for vacuumizing and nitrogen is introduced as replacement gas, so that the oxygen-free atmosphere during the operation of the equipment is ensured, and the production safety is ensured. And introducing the vacuumized gas into a secondary combustion chamber for harmless treatment.
3. The temperature of the secondary combustion furnace flue gas reaches 850-950 ℃, and if the secondary combustion furnace flue gas directly enters the tail gas purification unit, the heat energy is wasted. The invention introduces the high-temperature flue gas of the secondary combustion furnace into the shell of the preheating and drying chamber as a heat source to heat the materials. The temperature of the flue gas is reduced to 550 ℃ and the flue gas is discharged, thereby greatly saving energy consumption.
4. The adsorbate in the adsorption saturated activated carbon can be desorbed from the pores of the activated carbon at high temperature, so that the adsorbate is desorbed at high temperature, the originally blocked pores of the activated carbon are opened, the adsorption performance of the activated carbon is recovered, and the activated carbon is obtained through regeneration.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of the regeneration of the activated carbon of the present invention.
Detailed Description
The following is a detailed embodiment of the present invention and the accompanying drawings are incorporated to illustrate the technical solution of the present invention
Further, the present invention is not limited to these examples.
As shown in the figures 1-2 of the drawings,
example 1
First, regeneration processing unit
(1) The waste honeycomb activated carbon is sent into a vacuum chamber, the feeding amount is 300kg/h, the vacuum chamber is made of anticorrosive steel materials, the working size (1000 x 600) mm and the thickness 8mm are made into a closed chamber with reinforcing ribs, an inlet vacuum door and an outlet vacuum door are arranged, and the opening and closing of the vacuum doors are completed by adopting hydraulic cylinders. The sealing adopts a high-temperature resistant rubber ring, and is provided with a vacuumizing electromagnetic valve and a nitrogen gas inlet electromagnetic valve. And introducing the vacuumized gas into a secondary combustion chamber for harmless treatment. Vacuum pumping is carried out through a vacuum pump, and nitrogen is introduced to be used as displacement gas, so that the oxygen-free atmosphere in the thermal desorption process is ensured, and the production safety is ensured. The nitrogen gas was introduced into the reactor at 5Nm3The gas output of the vacuumized waste gas is 5Nm3H is used as the reference value. And introducing the vacuumized waste gas into a secondary combustion chamber for combustion.
(2) Sending the waste gas honeycomb activated carbon into a preheating drying chamber, connecting a vacuum chamber with the preheating drying chamber, preheating the waste honeycomb activated carbon in the preheating drying chamber, indirectly preheating the activated carbon in the preheating drying chamber by adopting high-temperature flue gas generated by combustion in a secondary combustion chamber, and controlling the temperature of the high-temperature flue gas after heat exchange to be 550-600 ℃. And (4) introducing the high-temperature flue gas subjected to heat exchange into a tail gas treatment system, and introducing gas desorbed by activated carbon in the preheating drying chamber into a secondary combustion chamber for combustion. The inner cavity of the preheating drying chamber is made into a closed chamber by stainless steel 316L, spacer sleeves are designed on two sides, the top and the bottom of the preheating drying chamber for heat exchange, and the effective size of the preheating chamber is 2000 x 1000 x 600 mm. The preheating chamber is designed with two trays. The waste gas honeycomb activated carbon is preheated and dried in the preheating and drying chamber, and organic matters with low boiling points are desorbed.
(3) Then the activated carbon is sent into a desorption regeneration chamber, the whole cavity of the desorption regeneration chamber is communicated with a preheating drying chamber, the desorption regeneration chamber adopts a gas radiation pipe for radiation heating, natural gas is combusted, and the air input of the natural gas is 12Nm3The gas heating adopts a radiation pipe form, the radiation pipe adopts a burner which can absorb heat automatically, so that the discharged gas can be directly discharged after preheating combustion air and does not enter a secondary combustion chamber, thereby reducing the consumption of the gasThe pressure of the rear secondary combustion chamber can reduce the volume of the secondary combustion chamber, save energy and reduce the exhaust gas volume.
The radiant tubes are uniformly distributed on two sides of the desorption regeneration chamber, the lining of the desorption regeneration chamber is made of high-temperature refractory materials and outer heat-insulating materials, and the shell is used for sealing. In order to improve the efficiency of desorption regeneration, 3 circulating fans are arranged at the top of the desorption regeneration chamber, the circulating fans are controlled by frequency conversion, can suck or blow air, and can adjust the air volume according to the process requirements. Stainless steel 310S guide plates are arranged on two sides and the top of the interior of the desorption regeneration chamber, the circulating fan is a centrifugal fan, the air volume is blown down from two sides when the circulating fan operates, meanwhile, the heat emitted by the gas radiation tube is blown to the bottom of the desorption regeneration chamber, the bottom of the desorption regeneration chamber adopts a suspended guide rail mode, hot air is enabled to be below the guide rail, the top circulating fan sucks air upwards, meanwhile, the activated carbon is uniformly heated, the adsorbed substances in the activated carbon are desorbed, the air is sucked by the circulating fan, the desorption of the adsorbed substances in the activated carbon is accelerated, and finally, the desorbed air is sucked by a sealed draught fan and enters a secondary combustion chamber for heating and incineration treatment.
(2) The total gas output of the desorbed gas in the step (3) is 87.88Nm3/h。
(4) The activated carbon (212.12kg/h) after thermal desorption is sent into an activation chamber, the activation chamber is an independent closed chamber, the effective size is 1000 x 600mm, the shell is made of an anticorrosive steel plate and is provided with two double sealing doors, the interior of the activation chamber is made of high-temperature refractory materials and heat preservation materials, the fuel gas heating radiation pipe is made of a radiation pipe and anticorrosive heat conduction materials, the top and two sides of the activation chamber are provided with anticorrosive guide plates, the top is provided with an anticorrosive sealed circulating fan, the heat exchange mode is the same as that of a desorption regeneration chamber, the whole chamber of the activation chamber can be subjected to positive pressure and negative pressure pulse control, steam enters from two sides of the activation chamber and is sucked up and down by the circulating fan for stirring, and the whole activation chamber is always kept at the temperature of 850-. When the charging tray enters, the inner cavity always ensures that the entering steam reaches the required temperature to carry out activation treatment in the process temperature, and in order to ensure that the carbonization inside the activated carbon is cleaned, a positive pressure flushing method and a negative pressure suction method are adopted, so that the treatment effect is thorough. Activation chamberThe anti-corrosion guide plate is provided with a vacuum air pump and a steam inlet pipe, wherein the steam inlet pipe is designed inside two sides of the anti-corrosion guide plate. The exhaust valve and the steam inlet valve are automatically controlled, and in order to increase the internal pressure instantly in positive pressure, a certain amount of nitrogen can be mixed while steam enters. The top is provided with a pressure safety explosion-proof valve and an exhaust valve, and the exhaust gas enters a secondary combustion chamber for treatment. The whole process is automatically controlled. The air inflow of the water vapor is 4.5kg/h, and the air inflow of the natural gas is 10.2Nm3And h, the amount of the waste gas generated by activation is 5.59kg/h, and the waste gas enters a secondary combustion chamber for combustion.
(5) And (2) sending the activated carbon (namely 206.83kg/h) into a cooling chamber for cooling, sending the activated carbon into a closed cooling chamber, designing heat exchangers on four walls of the cooling chamber, and cooling by circulating water cooling heat exchange. The top of the cooling chamber is provided with a circulating fan, and the cooling of the cooling chamber is divided into two stages: the first stage is as follows: spraying atomized water drops through a two-fluid atomization spray gun (water and nitrogen), gasifying, absorbing heat and cooling quickly. The temperature in the chamber was reduced to 350 ℃. Introducing the gas into a flue gas outlet of the quenching tower; and a second stage: and (3) closing the atomizing spray gun, introducing nitrogen, stirring internal airflow by a circulating fan without discharging the nitrogen after the nitrogen enters, and accelerating heat exchange of the heat exchanger. The temperature in the cavity is reduced to 80 ℃, and the materials are discharged into a material waiting area. The circulation amount of the cooling water was 34.69kg/h, and the intake amount of nitrogen was 10Nm3H, discharge capacity of 93.17Nm3/h。
Second, tail gas purification unit
The tail gas purification unit comprises processes and equipment of a quench tower, activated carbon/lime injection, a bag type dust collector and a spraying deacidification tower.
(2) The quench tower sets up high pressure atomizer, becomes slight water smoke through compressed air with the feedwater atomizing, directly mixes with the flue gas, takes place heat and mass transfer, rapid cooling. The temperature of the preheated and dried flue gas (550-600 ℃) is reduced to below 220 ℃ within 1s in a quenching tower. Preventing the re-synthesis of dioxin. The air intake of the flue gas of the quenching tower is 1223.35Nm3H, water consumption of 267.42kg/h, size of the quenching tower phi 1 x 7m, and treatment requirements: 550 ℃ to 220 ℃ (within 1 s).
(3) Activated carbon/lime injection apparatus, activated carbon: adsorbing residual toxic and harmful components in the smoke; quick lime: absorb the moisture in the smoke and react with the acidic substances in the smoke. The consumption of the active carbon is 0.14kg/h, and the consumption of the quicklime is 0.16 kg/h.
(4) The bag type dust collector controls the filtering air speed in the cloth bag to be 0.6m/min, and intercepts and treats dust in the flue gas and active carbon and quicklime sprayed at the front end. And controlling the emission of the particulate matters in the flue gas to reach the standard. The treated air volume is 1700Nm3H, bag house size 3 x 2.4 x 4.8 m.
(5) In the alkali type washing tower, industrial caustic soda flakes are added into a water tank, and the PH value of circulating spray water in the water tank is controlled to be 8-9. NaOH reacts with acidic substances in the smoke, so that the acidic substances in the smoke are effectively reduced. Parameters are as follows: water supplement quantity: 0.12 t/h; NaOH consumption: 0.35 kg/h; size of the basic washing tower: Φ 1 × 3.5m, sludge discharge: 1 kg/h. Discharged gas 1701.66Nm3/h。
Harmless and heat supply unit
(1) The secondary combustion chamber is internally provided with a combustor, the inside of the effective size phi 1500 x 2500mm of the secondary combustion chamber is made of high-temperature refractory materials and heat preservation materials, organic waste gas enters from the bottom of the secondary combustion chamber, fuel gas is distributed at 120 ℃ through three burners, an air pipe is adopted in the middle for oxygen supply and layered combustion, the fuel gas is automatically increased or reduced according to the quantity of the organic gas, the air quantity and the air quantity are automatically regulated in proportion to finally reach the required temperature, and the gas after secondary combustion is introduced into a spacer sleeve of the preheating drying chamber to preheat materials. The combustion chamber is heated to about 1100 ℃ through a natural gas burner, the desorption gas stays in the second combustion chamber for more than 2s, the pyrolysis of the pyrolysis desorption gas is ensured, and the high-temperature harmless treatment is realized. The natural gas is burnt and is fed into the reactor for 5.8Nm3H, air 1100Nm3/h。
(2) SNCR denitration
The combustion temperature of the second half section of the secondary combustion chamber is strictly controlled within 950 ℃ under the action of a temperature-adjusting fan, a reducing agent (10% urea solution) is sprayed into the area through a delivery pump, and nitrogen oxides (NOx) are removed through reduction reaction. The urea consumption is 0.2kg/h, and the water inflow in the SNCR denitration area is 2kgH is used as the reference value. The flue gas after SNCR denitration treatment indirectly preheats the activated carbon in the preheating and drying chamber, and the treatment capacity of the flue gas is 1223.35Nm3/h。
And (4) conclusion: the adsorption capacity of the active carbon is recovered by 80-85%. The activated carbon after the first-stage regeneration enters an activation chamber, steam oxidizing gas is introduced to carry out gasification reaction at the temperature of 850-950 ℃, so that residual carbide is gasified into gases such as CO2 and CO, the surface of the micropores is cleaned, and the adsorption performance of the activated carbon is recovered by more than 95%.
When the activated carbon which is adsorbed to saturation is heated and regenerated, the method mainly comprises three stages:
(1) drying stage of saturated activated carbon: the water content of the used activated carbon was about 50%. The drying stage requires a large amount of heat for evaporation of the moisture in the pores and part of the low boiling point organics. 50% of the heat required in the thermal regeneration is consumed in the drying process. Therefore, it is important to set appropriate drying conditions in order to reduce the regeneration cost.
(2) Carbonizing the adsorbing substance: the volatile substance adsorbed and the high boiling point organic substance remained in the pores of the active carbon are carbonized. The low boiling point organic matter is removed within 350 deg.C, and further heated within about 800 deg.C, and the high boiling point organic matter is decomposed and carbonized in the adsorption state, and remains in the form of fixed carbon.
(3) And (3) activation stage of the carbonized organic matter: residual carbon generated in the carbonization process is decomposed by using gases such as water vapor, carbon dioxide, oxygen and the like at 800-1000 ℃, the activation effect of the water vapor is better than that of the carbon dioxide, the micropore volume of the activated carbon can be obviously recovered, and the amount of the water vapor is 80-100% of the mass of the activated carbon (dry carbon). The oxidation of oxygen is strong, which easily causes excessive consumption of the activated carbon body, and the oxygen is strictly controlled in a heating regeneration furnace. The invention adopts water vapor to decompose the oxidizing gas under the oxygen-deficient environment. The regeneration process is a high-temperature oxygen-deficient process, and organic elements and halogen mainly undergo oxidation reaction to generate stable oxides. Heavy metals are mainly present in the end product of activated carbon in the form of ash. Wherein, part of heavy metals Hg and the like are loaded in dust in the form of oxides and discharged.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although terms are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A regeneration process of waste honeycomb activated carbon is characterized by comprising the following steps: the method comprises the following steps:
s01: performing pyrolysis desorption, namely preheating the waste honeycomb activated carbon, and then performing pyrolysis desorption at the temperature of 500-600 ℃;
s02: activating, namely activating the activated carbon subjected to thermal desorption in the step S01 by adopting water vapor at the temperature of 850-950 ℃;
s03: cooling, namely cooling the activated carbon in the step S02 to obtain regenerated activated carbon; the steps S01, S02 and S03 are all performed under the condition of vacuum oxygen lack.
2. The regeneration process of the waste honeycomb activated carbon as claimed in claim 1, wherein in the step SO1, the waste honeycomb activated carbon is sent into a vacuum chamber, the vacuum chamber is vacuumized and is filled with nitrogen, the vacuumized gas is sent into a secondary combustion chamber for secondary combustion treatment, then the waste honeycomb activated carbon is sent into a preheating and drying chamber for preheating, and then is sent into a desorption regeneration chamber for pyrolysis desorption at the temperature of 500-.
3. The regeneration process of waste honeycomb activated carbon as claimed in claim 2, wherein in step S02, the thermally desorbed activated carbon is fed into the activation chamber, and positive pressure scouring and negative pressure suction are adopted, and water vapor is introduced into the activation chamber when the pressure in the activation chamber is positive; when the negative pressure in the activation chamber is generated, the gas in the activation chamber is pumped out by a vacuum air pump, and the pumped gas enters a secondary combustion chamber for secondary combustion treatment.
4. The regeneration process of the waste honeycomb activated carbon as claimed in claim 1, wherein the flue gas generated after the secondary combustion enters an SNCR denitration zone, urea solution is sprayed into the SNCR denitration zone to reduce nitrogen oxides in the flue gas into nitrogen, the flue gas passing through the SNCR denitration zone indirectly preheats the materials in the preheating and drying chamber, the temperature of the flue gas after heat exchange is controlled at 550-600 ℃, and the flue gas after heat exchange enters a tail gas treatment system.
5. The regeneration process of the waste honeycomb activated carbon as claimed in claim 1, wherein in the step S03, the activated carbon is fed into a cooling chamber, water and nitrogen are simultaneously sprayed through a two-fluid atomization spray gun, atomized water drops are sprayed to absorb heat through gasification, and the temperature in the cooling chamber is reduced to 350 ℃; and then closing the two-fluid atomization spray gun, introducing nitrogen, circulating the nitrogen in the cooling chamber, reducing the temperature in the cooling chamber to 80 ℃, and directly introducing waste gas generated by the cooling chamber into the tail gas treatment system.
6. The regeneration process of waste honeycomb activated carbon according to claim 1, wherein in step S03, the tail gas treatment system comprises a quench tower, an activated carbon/lime injection device, a bag filter and an alkali scrubber, and the temperature of the flue gas after heat exchange in the quench tower is reduced to below 220 ℃ within 1S; then introducing the gas into an activated carbon/lime injection device, and injecting activated carbon and lime; then introducing the gas into a bag type dust collector to remove particles in the gas; and then introducing the gas into an alkali type washing tower to remove acidic substances in the gas, and finally discharging.
7. The regeneration process of the waste honeycomb activated carbon as claimed in claim 6, wherein the waste gas generated from the cooling chamber is introduced into the flue gas outlet of the quenching tower.
8. The regeneration process of the waste honeycomb activated carbon as claimed in claim 4, wherein the gas is heated in the secondary combustion chamber to over 1100 ℃ and the retention time is over 2s, and then the combustion temperature of the latter half section of the secondary combustion chamber is controlled within 950 ℃ by the action of the temperature-adjusting fan.
9. The regeneration process of the waste honeycomb activated carbon as claimed in claim 4, wherein the temperature of the flue gas after heat exchange in the quenching tower is reduced to below 220 ℃ within 1 s.
10. The regeneration process of the waste honeycomb activated carbon as claimed in claim 3, wherein the internal gas is stirred by fans in the desorption regeneration chamber and the activation chamber.
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| CN112206755A (en) * | 2020-09-18 | 2021-01-12 | 杭州电子科技大学 | Activated carbon activation and regeneration device with self-adaptive function and activation and regeneration method thereof |
| CN112569916A (en) * | 2020-11-13 | 2021-03-30 | 长沙工研院环保有限公司 | Method for regenerating waste active carbon |
| CN112791717A (en) * | 2020-12-08 | 2021-05-14 | 浙江宜可欧环保科技有限公司 | Continuous activation and regeneration method for waste activated carbon |
| CN113856656A (en) * | 2021-10-27 | 2021-12-31 | 陕西延长石油（集团）有限责任公司 | Activated carbon regeneration device and method |
| CN114368751A (en) * | 2022-01-14 | 2022-04-19 | 浙江悦胜环境科技有限公司 | High-efficiency activated carbon activation process and activation device |
| CN114433021A (en) * | 2022-01-14 | 2022-05-06 | 浙江悦胜环境科技有限公司 | Multipurpose resource utilization system and method thereof |
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2020
- 2020-06-19 CN CN202010568771.6A patent/CN111632584A/en not_active Withdrawn
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| CN112569916A (en) * | 2020-11-13 | 2021-03-30 | 长沙工研院环保有限公司 | Method for regenerating waste active carbon |
| CN112791717A (en) * | 2020-12-08 | 2021-05-14 | 浙江宜可欧环保科技有限公司 | Continuous activation and regeneration method for waste activated carbon |
| CN113856656A (en) * | 2021-10-27 | 2021-12-31 | 陕西延长石油（集团）有限责任公司 | Activated carbon regeneration device and method |
| CN113856656B (en) * | 2021-10-27 | 2024-04-02 | 陕西延长石油（集团）有限责任公司 | Activated carbon regeneration device and method |
| CN114368751A (en) * | 2022-01-14 | 2022-04-19 | 浙江悦胜环境科技有限公司 | High-efficiency activated carbon activation process and activation device |
| CN114433021A (en) * | 2022-01-14 | 2022-05-06 | 浙江悦胜环境科技有限公司 | Multipurpose resource utilization system and method thereof |
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