CN103588204A - Preparation method of special activated carbon for recycling coal-based vehicular oil gas - Google Patents
Preparation method of special activated carbon for recycling coal-based vehicular oil gas Download PDFInfo
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Abstract
The invention relates to a preparation method of special activated carbon for recycling coal-based vehicular oil gas. In the preparation method, an activated carbon product is prepared from Ningxia Taixi smokeless cleaned coal, asphalt and tar as raw materials by a process of acid pickling between twice activation. The preparation method has the advantages as follows: 1, through the process of acid pickling between twice activation, the application range of the raw materials is widened, the procurement cost of the raw materials is reduced, and modification on surface functional groups is achieved; 2, the strength of a finished product is increased by 2-5% and the service life of the vehicular activated carbon is prolonged; 3 invalid volatilization of carbonaceous materials in a moulding strip is reduced, thus achieving maximization of the fixed carbon content in the materials; 4, the BWC (butane working capacity) value of the prepared activated carbon can reach 10.5-14.0g/100ml, and after long-term use, the adsorption-desorption performance of the activated carbon is stabilized at more than 81% of the initial performance, thus fully meeting the normal use requirement of a vehicular oil gas recycling system.
Description
Technical field
The present invention relates to a kind of working method of gac, particularly relate to the preparation method of the vehicle-mounted active carbon special for oil gas recovery of a kind of ature of coal.
Background technology
Carbon is highly stable a kind of element at normal temperatures, and gac is one of a kind of physical structure form of carbon.In appearance, the particulate solid of the general particle diameter of gac between 1～5mm.On microcosmic, gac has and huge tree-shaped micropore structure.Because gac has microscopic void, can hold and adsorb other material, so be widely used in field of purification.
Vehicle-mounted gas recovery system for oil (ORVR) is mainly by charcoal canister; two-way valve; removal control valve, air filter or air-breathing fly-ash separator, water stopping valve; liquid trap; the composition such as pipeline and support, major function is, when engine is not worked, the gasoline vapor evaporating is adsorbed onto to gac the inside, prevents from being dispersed in atmosphere; simultaneously in engine operation again by being adsorbed onto gasoline vapor desorption in gac out for engine, reach the object of protection of the environment capable of saving fuel oil consumption.In this system, the quality of gac adsorption desorption ability has determined that can whole gas recovery system for oil normally use and the length in work-ing life.The research and development that the automotive industry that China is fast-developing and the Environmental awareness day by day improving are vehicular active carbon are produced market outlook are widely provided.
Current coal mass active carbon production technique is comparatively simple, is difficult to meet the requirement of vehicle-mounted gas recovery system for oil to charcoal absorption desorption performance, and utilizes production technique that hard coal produces vehicle-mounted oil gas recovered carbon still in heuristic process.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, the preparation method of the vehicle-mounted active carbon special for oil gas recovery of a kind of ature of coal is provided.
The technical scheme taked is for achieving the above object:
A preparation method for the vehicle-mounted active carbon special for oil gas recovery of ature of coal, take the smokeless clean fine coal of Ningxia Tai Xi, pitch and tar is raw material, adopts the technique that adds pickling in the middle of twice activation to prepare activated carbon product;
Treatment step comprises: raw material blending, extruding, maintenance, sizing, anoxybiotic destructive distillation, once activation, pickling, water logging, oven dry, re-activation;
Once activation and re-activation all adopt 900～920 ℃ of water vapour;
The acid source of pickling adopts 5% hydrochloric acid;
Raw material is that the smokeless clean fine coal of Ningxia Tai Xi, the granularity of ash 4～4.5% is less than the hard pitch of 10mm and the high temperature tar of asphalt content >=50%;
The concrete grammar of described raw material blending is:
The smokeless clean fine coal of Ningxia Tai Xi drying is mixed to hard pitch in the ratio of 100:5 and fully mix rear abrasive dust, powder mix mixes in the ratio of 100:35 with the high temperature tar after dehydrothermal again;
The concrete grammar of described extruding is:
Compound becomes the column of diameter 3.1mm by the pressure extrusion of 14～16KG;
The concrete grammar of described sizing is:
Column is dried at least 8 hours with drying machine;
The concrete grammar of described anoxybiotic destructive distillation is:
Column after sizing is proceeded in charring furnace to anoxybiotic destructive distillation in the thermograde of 250～450 ℃ and within 30 minutes, obtain carbonized material;
The described once concrete grammar of activation is:
Under the activation temperature of 900～920 ℃, carbonized material is once activated with water vapour, after bulk specific gravity reaches 500～550g/l, stop activation, obtain activated material one time;
The concrete grammar of described pickling is:
An activated material is filtered to moisture by 5% salt acid soak after 30 minutes;
The concrete grammar of described re-activation is:
After reaching 330～360g/l with 900～920 ℃ of steam activation to bulk specific gravitys, product after softening water rinsing is dried obtains final activated carbon product.
Beneficial effect of the present invention is as follows:
(1) preparation method of the vehicle-mounted active carbon special for oil gas recovery of ature of coal of the present invention completes through adding the technique of pickling in the middle of twice activation, reduced the dependence to the too western coal of ultra-low ash content (ash≤2.5%), adopting the conventional Taixi anthracite that ash is 4～4.5% is raw material, increase raw material use range, reduced the purchase cost of raw material, and by pickling, improve the fixed carbon content of gac, realize the modification of surface functional group, for the stable control of re-activation creates conditions.
(2) raw material of the present invention adopts the Taixi anthracite that ash is 4～4.5%, mixes the hard pitch below granularity 10mm, makes the intensity of molding mass and even final finished improve 2～5%, the work-ing life of having improved automobile-used charcoal.
(3) anoxybiotic pyrolysis temperature of the present invention is controlled in the thermograde of 250～450 ℃, lower 100 ℃ than the pyrolysis temperature of general gac (350～550 ℃), control charging capacity and stove rotating speed, reduce the invalid volatilization of carbonaceous material in moulding bar, realized the maximization of fixed carbon content in material.
(4) this technical products Yi enterprise produces as a trial in having dropped at present, the gac of preparation detects according to ASTM D5228-92 standard, its BWC(butane working capacity) value can reach 10.5～14.0g/100ml, adsorption desorption stable performance after life-time service is at the more than 81% of initial performance, meet the normal use of vehicle-mounted gas recovery system for oil (ORVR) completely, there is higher promotional value.
Accompanying drawing explanation
Fig. 1 is preparation method's schema of the vehicle-mounted active carbon special for oil gas recovery of a kind of ature of coal of the present invention.
Embodiment
The preparation method of the vehicle-mounted active carbon special for oil gas recovery of a kind of ature of coal of the present invention, process is as follows:
(1) raw material blending: by the smokeless clean fine coal of Ningxia Tai Xi of ash 4～4.5%, dry to moisture and be less than 5%, mix the hard pitch that granularity is less than 10mm simultaneously and fully mix rear abrasive dust in the ratio of 100:5, fineness of grinding reaches 325 orders at least by 70%; Select the high temperature tar of asphalt content >=50%, dewater to moisture and be less than 4%, be heated to 70～80 ℃, then the coal dust of milled and tar are incubated to mix and blend 20min in the ratio of 100:35 in agitator kettle;
(2) extruding: compound becomes the column of diameter 3.1mm by the pressure extrusion of 14～16KG;
(3) maintenance and sizing: column, through maintaining machine maintenance, dry at least 8 hours, makes column sizing;
(4) anoxybiotic destructive distillation: the column after sizing proceeds in charring furnace anoxybiotic destructive distillation in the thermograde of 250～450 ℃ and obtains carbonized material for 30 minutes;
(5) once activation: under the activation temperature of 900～920 ℃, carbonized material is once activated with water vapour, stop activation after bulk specific gravity reaches 500～550g/l, obtain activated material one time;
(6) pickling a: activated material is filtered to moisture by 5% salt acid soak after 30 minutes;
(7) water logging and oven dry: acid-leached product filters moisture through the softening water immersion of >=70 ℃ after 30 minutes, and then product is dried to moisture < 8%;
(8) re-activation: with 900～920 ℃ of water vapour, the activated material after rinsing is carried out to re-activation, obtain final activated carbon product after bulk specific gravity reaches 330～360g/l.
The present invention produces as a trial in enterprise drops into, the gac of preparation detects according to ASTM D5228-92 standard, its BWC(butane working capacity) value can reach 10.5～14.0g/100ml, adsorption desorption stable performance after life-time service, at the more than 81% of initial performance, meets the normal use of vehicle-mounted gas recovery system for oil (ORVR) completely.
Claims (10)
1. a preparation method for the vehicle-mounted active carbon special for oil gas recovery of ature of coal, is characterized in that, take the smokeless clean fine coal of Ningxia Tai Xi, pitch and tar is raw material, adopts the technique that adds pickling in the middle of twice activation to prepare activated carbon product.
2. according to preparation method claimed in claim 1, it is characterized in that, treatment step comprises: raw material blending, extruding, maintenance, sizing, anoxybiotic destructive distillation, once activation, pickling, water logging, oven dry, re-activation;
Once activation and re-activation all adopt 900～920 ℃ of water vapour; The acid source of pickling adopts 5% hydrochloric acid.
3. according to the preparation method described in claim 1 or 2, it is characterized in that, raw material is that the smokeless clean fine coal of Ningxia Tai Xi, the granularity of ash 4～4.5% is less than the hard pitch of 10mm and the high temperature tar of asphalt content >=50%.
4. according to preparation method claimed in claim 2, it is characterized in that the concrete grammar of described raw material blending is:
The smokeless clean fine coal of Ningxia Tai Xi drying is mixed to hard pitch in the ratio of 100:5 and fully mix rear abrasive dust, powder mix mixes in the ratio of 100:35 with the high temperature tar after dehydrothermal again.
5. according to preparation method claimed in claim 2, it is characterized in that the concrete grammar of described extruding is:
Compound becomes the column of diameter 3.1mm by the pressure extrusion of 14～16KG.
6. according to preparation method claimed in claim 2, it is characterized in that the concrete grammar of described sizing is:
Column is dried at least 8 hours with drying machine.
7. according to preparation method claimed in claim 2, it is characterized in that the concrete grammar of described anoxybiotic destructive distillation is:
Column after sizing is proceeded in charring furnace to anoxybiotic destructive distillation in the thermograde of 250～450 ℃ and within 30 minutes, obtain carbonized material.
8. according to the preparation method described in claim 1 or 2, described in it is characterized in that, once the concrete grammar of activation is: under the activation temperature of 900～920 ℃, carbonized material is once activated with water vapour, after bulk specific gravity reaches 500～550g/l, stop activation, obtain activated material one time.
9. according to the preparation method described in claim 1 or 2, it is characterized in that the concrete grammar of described pickling is:
An activated material is filtered to moisture by 5% salt acid soak after 30 minutes.
10. according to the preparation method described in claim 1 or 2, it is characterized in that the concrete grammar of described re-activation is: after the product after softening water rinsing is dried reaches 330～360g/l with 900～920 ℃ of steam activation to bulk specific gravitys, obtain final activated carbon product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108236920A (en) * | 2016-12-26 | 2018-07-03 | 株式会社马勒滤清系统 | Honeycomb sorbent material and its manufacturing method and canister |
| CN114210174A (en) * | 2021-11-10 | 2022-03-22 | 生态环境部华南环境科学研究所 | Absorption/adsorption coupling reinforced stink and organic waste gas treatment method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121042A (en) * | 1994-10-18 | 1996-04-24 | 宁夏回族自治区化工研究所 | Coal-produced active carbon as fluidized bed carrier and its production method |
| CN1634761A (en) * | 2003-12-30 | 2005-07-06 | 中国石化上海石油化工股份有限公司 | Process for preparing granular active carbon |
-
2013
- 2013-11-21 CN CN201310588049.9A patent/CN103588204B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121042A (en) * | 1994-10-18 | 1996-04-24 | 宁夏回族自治区化工研究所 | Coal-produced active carbon as fluidized bed carrier and its production method |
| CN1634761A (en) * | 2003-12-30 | 2005-07-06 | 中国石化上海石油化工股份有限公司 | Process for preparing granular active carbon |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108236920A (en) * | 2016-12-26 | 2018-07-03 | 株式会社马勒滤清系统 | Honeycomb sorbent material and its manufacturing method and canister |
| CN108236920B (en) * | 2016-12-26 | 2022-07-19 | 株式会社马勒滤清系统 | Honeycomb adsorbent, method for producing same, and canister |
| CN114210174A (en) * | 2021-11-10 | 2022-03-22 | 生态环境部华南环境科学研究所 | Absorption/adsorption coupling reinforced stink and organic waste gas treatment method |
| CN114210174B (en) * | 2021-11-10 | 2023-08-04 | 生态环境部华南环境科学研究所 | Malodor and organic waste gas treatment method with enhanced absorption/adsorption coupling |
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Address after: Block a, science and Technology Park, high tech Development Zone, Yinchuan City, Ningxia Hui Autonomous Region Patentee after: Ningxia Huahui Environmental Protection Technology Co.,Ltd. Address before: 750002 block a, science and Technology Innovation Park, Yinchuan hi tech Development Zone, Ningxia Hui Autonomous Region Patentee before: NINGXIA HUAHUI ACTIVATED CARBON Co.,Ltd. |
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