CN101596450B - Technology and equipment for electric heating regeneration of activated carbon - Google Patents
Technology and equipment for electric heating regeneration of activated carbon Download PDFInfo
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- CN101596450B CN101596450B CN200810061697.8A CN200810061697A CN101596450B CN 101596450 B CN101596450 B CN 101596450B CN 200810061697 A CN200810061697 A CN 200810061697A CN 101596450 B CN101596450 B CN 101596450B
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- 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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- 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
- B01J20/3441—Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves
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Abstract
The invention belongs to the technical field of regeneration of activated carbon and in particular relates to technology and equipment for electric heating regeneration of activated carbon. The invention is characterized in that granular wet carbon is dehydrated, dried and put into an electric heating regeneration furnace of activated carbon, the carbon granules orderly pass through a furnace chamber between graphite electrodes, the activated electric arc enables the carbon granules to be conducted and heated, the temperature of the carbon granules in the furnace chamber gradually rises from top to bottom, the activation temperature of the carbon granules is from 650 DEG C to 850 DEG C, the carbon granules activated by electric heating are continuously discharged through a discharge hole at the bottom of the furnace, and the discharged carbon granules are cooled slowly in an oxygen-isolated nitrogen environment. Compared with the traditional technology, the invention has the advantages of low energy consumption, small wastage and accurate temperature control and greatly improves the production efficiency and the energy utilization. The iodine value, the phenol adsorption capacity, the specific surface area and other indexes of the regenerated activated carbon which is produced by the technology are all relatively stable, wherein the reversion rate of the iodine value is 98 percent of new carbon.
Description
Technical field:
The invention belongs to the active carbon regenerating technology field, be specifically related to a kind of active carbon electric heating regenerating technique and equipment thereof.
Background technology:
Active carbon has highly developed pore structure and great specific area, and is nonpoisonous and tasteless, and molecule is had extremely strong adsorption capacity, is a kind of good adsorbent, the various fields extensive application such as chemical industry, food, water treatment.The consumption of active carbon increases sharply, and by the end of the year 1997, the World Activated Carbon consumption reaches 650,000 tons; And by 2004, surpassed 700,000 tons, and with annual 15% speed increase.The a large amount of useless charcoal that produces in the application process of active carbon not only can cause the waste of resource as not processing and recycling, and also can cause secondary pollution to environment.Therefore, no matter still consider from environmental angle from economic benefit, select suitable active carbon regenerating technology all necessary.
Regenerating active carbon refers to that physics or chemical method under the prerequisite of not destroying the active carbon original structure, are removed the adsorbate that is adsorbed in activated carbon capillary, recovers its absorption property, reaches and reuses purpose, claims again activation.
At present, the regenerating active carbon technique of industrial use mainly contains following several: the chemical method of medicament wash-out, bio-regeneration method, wet oxidation process, electrolytic oxidation and thermal regeneration method.
The temperature of decomposing desorption according to the organic matter that adsorbs in the active carbon in heating process is different, and thermal regeneration is sent out and can be divided into low-temperature heat regeneration and high-temperature heating regeneration.
Usually, the active carbon to the needs that produce in the water treatment procedure are regenerated at first will dewater to it, generally needs experience drying, roasting or title charing and activation three phases in the thermal regeneration overall process.
At present, the useless charcoal that produces in the water treatment procedure, regeneration technology is take the thermal regeneration method as main, and what use in still producing is general thermal regeneration method, and not only energy consumption is high, and the proportion of goods damageds are up to 5%～16%.Especially the energy consumption height becomes the bottleneck that regeneration method of active carbon is used.
The thermal regeneration device has polytype.Use at present both at home and abroad more have multiple field, swinging, fluidized bed type, moving-bed type etc.
Chinese patent CN85100619 discloses a kind of active carbon forced electric discharge reactivating technique and device thereof.The forced electric discharge thermal regeneration device of this patent disclosure, be refractory brick or heat resistance concrete fire square type or grooved, the bottom is the typing body of heater of reverse taper, and the pressure excitation apparatus is set in the bottom.It is limited that this installs continuous production capacity, and the bottom excites to exist and excites problem insufficient, that the carbon granule contact-making surface is limited, and is wayward to regenerating furnace electric heating temperature.And the cooling means that does not relate to the electric-heating activated carbon granule in this patent, the recovery time is also longer.
Summary of the invention:
The object of the invention is to solve the problem that loss is high in the regenerating active carbon process, energy consumption is high, the recovery time is long, a kind of new active carbon electric heating regenerating Processes and apparatus is provided.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
A kind of active carbon electric heating regenerating technique is characterized in that the wet charcoal of graininess through dehydration, drying, drops into electric heating regenerating furnace; Carbon granule by the furnace chamber between graphite electrode, excites electric arc to make the carbon granule conductive heater successively; The carbon granule temperature raises from top to bottom gradually in the furnace chamber, and the carbon granule activation temperature is at 650～850 ℃; Carbon granule is through furnace bottom continuous blow-down behind the electric-heating activated, and the carbon granule after the discharging adopts the nitrogen slow cooling.
Described active carbon electric heating regenerating technique is through carbon granule Slow cooling under nitrogen oxygen barrier environment of regenerating furnace furnace bottom discharging.
Described active carbon electric heating regenerating technique, wet charcoal are moisture approximately 70%～80% after the drain sump dehydration, and to carrying the charcoal tank, then negative pressure sucks ebullated bed with it by vacuum lifting, and drying makes its moisture content be down to 6% in 200～250 ℃ of hot blasts.
The regenerating furnace of described regenerating active carbon electric heating technique is characterized in that body of heater is vertical tetrahedron, and graphite electrode plate is symmetrical arranged, and the two sides is refractory material laying in addition, and stove top is provided with charging aperture, and furnace bottom is provided with controlled discharging opening.Attemperating unit connects respectively the point for measuring temperature that is arranged on body of heater upper, middle and lower section.
Described active carbon electric heating regenerating furnace, the ratio that it is characterized in that being symmetrical arranged graphite electrode spacing and neighbouring two pairs of graphite electrode spacings is 1: 3～3.5.
Described active carbon electric heating regenerating furnace is characterized in that ghyristor circuit and graphite electrode are connected to form attemperating unit.
Described active carbon electric heating regenerating furnace is characterized in that constructing constricted channel formation extinguishing arc mouth with refractory material in the middle part of the body of heater, has improved sintering phenomenon in the activated carbon furnace that produces arc short-circuit between the electrode and cause.
Regenerating furnace of the present invention can be designed to the syllogic temperature regulating device, adopts graphite electrode as excitaton source, and carbon granule mobile in the furnace chamber is as conductor, and CONTACT WITH FRICTION between carbon granule is so that carbon granule resistance generation electric arc conduction and heat temperature raising.
Concrete regeneration technology of the present invention is that the carbon granule after dehydrating drops into the regeneration body of heater from the furnace roof charging aperture, carbon granule moves down in furnace chamber, experience first, second and third temperature section carbon granule temperature continuously from 300 ℃ to 600 ℃ to 850 ℃ design temperature, behind abundant priming reaction, from furnace bottom continuous blow-down, carbon granule enters in the sealing storehouse that is full of nitrogen, and oxygen barrier makes it naturally cool to room temperature.
The inventive method is utilized carbon granule Contact resistance generation electric arc conduction and is heated up, and has avoided the high energy consumption of traditional handicraft, the shortcomings such as high loss; Regenerating furnace among the present invention utilizes the segmented temperature control technique, it is insufficient to have solved in the traditional handicraft carbon granule contact, temperature is controlled inaccurate shortcoming, and the flow of the Data Control carbon granule that can obtain according to point for measuring temperature, has further improved production efficiency and energy utilization rate; After product was come out of the stove, the present invention adopted the nitrogen Slow cooling, avoided the high temperature carbon granule directly to contact with air, had further reduced the proportion of goods damageds.
The indexs such as regenerated carbon iodine number, phenol absorption and specific area that made by this technique are all more stable, and wherein the iodine number response rate reaches 98% of new charcoal.
Description of drawings:
Fig. 1 is the regenerating active carbon process chart
Fig. 2 is the structural representation of activated carbon regeneration furnace
Wherein: 1 charging aperture, 2 graphite electrode plates, 3 attemperating units, 4 adjustable discharge mouths, 5 bodies of heater, 6 bases, 7 furnace roofs, 8 points for measuring temperature
The specific embodiment:
Below in conjunction with accompanying drawing a kind of specific embodiment of the present invention is described:
Active carbon electric heating regenerating explained hereafter ability is 75Kg/h in the present embodiment.
The wet charcoal of the graininess that produces in the water treatment procedure dewaters through drain sump, adopts negative pressure to suck ebullated bed, and is dry in 200～250 ℃ hot blast, makes its moisture content be down to 6%.
Carbon granule after dehydrating is dropped into electric heating regenerating furnace through charging aperture, and carbon granule by the furnace chamber between graphite electrode, excites electric arc to make the carbon granule conductive heater successively, and the carbon granule temperature raises from top to bottom gradually in the furnace chamber, and carbon granule mobile linear velocity in furnace chamber is 5.83m/s.
The regenerating furnace furnace chamber is provided with three pairs of graphite electrode plates, and being symmetrical arranged the graphite electrode spacing is 110mm, and neighbouring two pairs of graphite electrode spacings are 350mm.
External voltage is 380V, and the corner connection secondary voltage after pressure regulation is 50～70V, and current density is 170～190A/dm
2, by adjustment voltage and current density controlled discharge frequency, thereby the temperature that realizes furnace chamber intensification heating process is controlled.The default heating-up temperature of furnace chamber is respectively 300 ℃～350 ℃, 600 ℃～650 ℃ and 850 ℃～900 ℃ from top to bottom.
Carbon granule through the heat temperature raising that little by little discharges after by furnace bottom adjustable discharge mouth discharging, by temperature in attemperating unit and the control discharging rate adaptation stove, the continuously hitless operation of this process.
The carbon granule that discharging opening gives off enters cooling sealing storehouse, slowly naturally cooling under the nitrogen oxygen barrier environment in the storehouse.
The electric heating regenerating furnace of described active carbon electric heating regenerating technique, body of heater is vertical tetrahedron, comprises body of heater, charging aperture, discharging opening and attemperating unit.Body of heater comprises graphite electrode and refractory brick, and graphite electrode is symmetrical arranged, and the two sides is laying fireproof bricks in addition; Furnace roof and base are heat proof material and build, and furnace roof is provided with the import material, and furnace bottom is provided with the adjustable discharge mouth, and attemperating unit connects the body of heater upper, middle and lower and divides other point for measuring temperature, and body of heater is provided with point for measuring temperature, and point for measuring temperature is provided with the platinum rhodium electricity coupling of a thermometric.
Regenerating furnace furnace chamber effective cross sectional area is 110mm * 110mm, effective depth 3mm, dischargeable capacity 0.036m
3, general assembly charcoal amount 20kg in the stove.
This active carbon electric heating regenerating furnace adopts SCR rectification circuit and graphite electrode to be connected to form attemperating unit.The body of heater middle part of this active carbon electric heating regenerating furnace is constructed constricted channel with refractory material and is formed the extinguishing arc mouth, and the cross-sectional area of constricted channel is 1/2nd of body of heater cross-sectional area.
Claims (2)
1. active carbon electric heating regenerating technique, it is characterized in that the wet charcoal of graininess is after the drain sump dehydration moisture 70%～80%, by vacuum lifting to carrying the charcoal tank, then negative pressure sucks ebullated bed with it, dry in 200～250 ℃ of hot blasts, make its moisture content be down to 6%, drop into active carbon electric heating regenerating furnace, carbon granule is successively by the furnace chamber between graphite electrode, excite electric arc to make the carbon granule conductive heater, the carbon granule temperature raises from top to bottom gradually in the furnace chamber, the carbon granule activation temperature is at 650～850 ℃, carbon granule behind electric-heating activated is through the continuous blow-down of furnace bottom discharging opening, carbon granule after the discharging carries out slow cooling, the body of heater of described active carbon electric heating regenerating furnace is vertical tetrahedron, graphite electrode is symmetrical arranged, the two sides is refractory material laying in addition, furnace bottom is provided with controlled discharging opening, attemperating unit is connected on the body of heater, in, the point for measuring temperature of hypomere, the body of heater middle part of this active carbon electric heating regenerating furnace is constructed constricted channel with refractory material and is formed the extinguishing arc mouth, the cross-sectional area of constricted channel is 1/2nd of body of heater cross-sectional area, and wherein, the ratio that is symmetrical arranged graphite electrode spacing and neighbouring two pairs of graphite electrode spacings is 1: 3～3.5; SCR rectification circuit and graphite electrode are connected to form described attemperating unit.
2. active carbon electric heating regenerating technique according to claim 1 is characterized in that the carbon granule behind electric-heating activated adopts nitrogen oxygen barrier Slow cooling.
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| CN200810061697.8A CN101596450B (en) | 2008-06-02 | 2008-06-02 | Technology and equipment for electric heating regeneration of activated carbon |
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| CN200810061697.8A CN101596450B (en) | 2008-06-02 | 2008-06-02 | Technology and equipment for electric heating regeneration of activated carbon |
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| CN101596450B true CN101596450B (en) | 2013-05-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4203615B1 (en) * | 2021-12-23 | 2024-01-31 | Zhejiang Qizheng Environmental Protection Technology Co., Ltd. | Method and device for regenerating granular activated carbon by arc initiation and discharge |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102794163A (en) * | 2011-05-24 | 2012-11-28 | 沈善明 | Thermal regeneration furnace for waste powdered activated carbon |
| CN102755884A (en) * | 2012-04-13 | 2012-10-31 | 山东轻工业学院 | Method for regenerating waste active carbon by chemical medicament |
| CN103007908A (en) * | 2012-12-16 | 2013-04-03 | 西王药业有限公司 | Adsorbent regeneration compensating device and application process thereof |
| CN104841370B (en) * | 2015-04-09 | 2017-05-10 | 天华化工机械及自动化研究设计院有限公司 | Upright vacuum sealed type "drying-firing" method for PX spherical adsorbent |
| CN105289563B8 (en) * | 2015-12-02 | 2018-07-31 | 江苏亚旗环保科技有限公司 | A kind of Regenevating Waste Activated Carbon processing method |
| CN105293743A (en) * | 2015-12-04 | 2016-02-03 | 湖北君集水处理有限公司 | Method for performing water purification plant advanced treatment by using submerged ultrafiltration membrane |
| CN106423115B (en) * | 2016-11-07 | 2018-11-23 | 杭州电子科技大学 | A kind of saturated activity charcoal electric heating regeneration method and device |
| CN113546612A (en) * | 2020-04-26 | 2021-10-26 | 上海道扬环保科技有限公司 | Activated carbon regeneration device and activated carbon regeneration method |
| CN113231051B (en) * | 2021-04-26 | 2022-09-13 | 杭州电子科技大学 | Sectional air inlet type activated carbon electric heating regeneration system and method thereof |
| CN113426431B (en) * | 2021-06-24 | 2022-06-24 | 杭州电子科技大学 | Low-voltage arc striking regeneration device and method for activated carbon |
| CN113731384A (en) * | 2021-08-27 | 2021-12-03 | 浙江颀正环保科技有限公司 | Constant-power electrothermal regeneration method and device for granular activated carbon |
| CN114984936A (en) * | 2022-06-30 | 2022-09-02 | 聂欣 | Powder and granular activated carbon mixed regeneration device and method based on electric heating |
| CN116637607A (en) * | 2023-05-22 | 2023-08-25 | 山东一清环保设备有限公司 | Continuous solid waste regeneration process method |
| CN117339585B (en) * | 2023-11-23 | 2024-04-30 | 青岛冠宝林活性炭有限公司 | Pyrolysis device for powdered activated carbon |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261857A (en) * | 1974-05-09 | 1981-04-14 | Kyoritsu Yuki Kogyo Kenkyusho | Method and apparatus for regenerating used active carbon |
| CN2512496Y (en) * | 2001-03-02 | 2002-09-25 | 翁元声 | Active carbon frequency modulation discharge pulse generator |
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2008
- 2008-06-02 CN CN200810061697.8A patent/CN101596450B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4261857A (en) * | 1974-05-09 | 1981-04-14 | Kyoritsu Yuki Kogyo Kenkyusho | Method and apparatus for regenerating used active carbon |
| CN2512496Y (en) * | 2001-03-02 | 2002-09-25 | 翁元声 | Active carbon frequency modulation discharge pulse generator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4203615B1 (en) * | 2021-12-23 | 2024-01-31 | Zhejiang Qizheng Environmental Protection Technology Co., Ltd. | Method and device for regenerating granular activated carbon by arc initiation and discharge |
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Address after: 317600 city street, Yucheng street, Yuhuan, Zhejiang Province, No. 121 Patentee after: Taizhou Zhongchang water treatment equipment Limited by Share Ltd Address before: 317600 Chengguan Road No. 121, Zhuhai port town, Yuhuan County, Taizhou, Zhejiang Patentee before: Taizhou Zhongchang Water Treatment Equipment Co., Ltd. |
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Effective date of registration: 20191121 Address after: 311100 No. 502 Xingzhong Road, Linping Street, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Zhongchang Water Treatment Technology Co., Ltd. Address before: 317600 city street, Yucheng street, Yuhuan, Zhejiang Province, No. 121 Patentee before: Taizhou Zhongchang water treatment equipment Limited by Share Ltd |