CN104099152B - The novel process that a kind of brown coal drying shaped coal or semicoke passivation are refined - Google Patents
The novel process that a kind of brown coal drying shaped coal or semicoke passivation are refined Download PDFInfo
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- CN104099152B CN104099152B CN201310129039.9A CN201310129039A CN104099152B CN 104099152 B CN104099152 B CN 104099152B CN 201310129039 A CN201310129039 A CN 201310129039A CN 104099152 B CN104099152 B CN 104099152B
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Abstract
The present invention relates to the novel process that a kind of brown coal drying shaped coal or semicoke passivation are refining.Brown coal drying shaped coal or semicoke are added in steeping cell by the present invention, liming is sprayed into steeping cell uniformly simultaneously, brown coal drying shaped coal after having flooded or semicoke are entered in treater, in treater, low-temperature flue gas is passed into again by hotblast stove, both carry out abundant contact treating, namely obtain product after having refined; Calcium hydroxide in the present invention in liming and the carbon dioxide reaction in flue gas generate calcium carbonate; calcium carbonate-filled brown coal drying shaped coal or semicoke micropore; calcium carbonate protective membrane is formed at brown coal upgrading moulded coal or semicoke surface; arrive and reduce brown coal drying shaped coal or semicoke activity; thus reach the refining object of passivation; can reduce the generation of brown coal upgrading moulded coal or semicoke dust, the product obtained is stablized, and can realize long distance delivery.
Description
Technical field
The present invention relates to the novel process that solid phase prod-semicoke passivation that a kind of brown coal drying shaped coal or brown coal low temperature pyrogenation (destructive distillation) process obtain is refining.
Background technology
Rich coal resources in China, but coal resource utilizes the stage being also in burn for main poor efficiency, maximum discharge; In recent years China lignite resource amount, verify reserves and constantly increase, the comprehensive high-efficiency of coal resource especially brown coal is utilized and seems and become more and more important.Brown coal pyrolysis (destructive distillation) upgrading refers to that, by coal heating under isolated air (or at nonoxidizing atmosphere) condition, generation pyrolytic reaction, finally obtains the course of processing (method) of tar, coal gas and semicoke.Brown improving quality of coal by pyrolysis and related process or products perfection combine, and can improve overall economic efficiency, effectively utilize significant to brown coal.
Brown coal drying is shaping is also the common technology of brown coal upgrading, China's Shenhua Group and China Mining Univ. (Beijing), Tianhua Chemical Machinery & Automation Design Inst, the clean brown coal device of HPU of middle letter heavy industry cooperative development produces brown coal drying and upgrading moulding product exactly, Datang Xilin Hot brown coal drying and upgrading company also produces drying and upgrading moulded coal, but the activity of briquettes produced is high, easy efflorescence during storage, spontaneous combustion, handling, during conveying, dust is large, make the storage of brown coal drying moulding product, there is safety and environmental protection hidden danger in handling and transport, have a strong impact on shaping the applying of brown coal drying.
What need passivation refinement treatment equally is the solid phase prod semicoke of brown coal pyrolysis, and lignite semi-coke calorific value is high, of many uses, may be used for, in the multi-production process such as gasification, shaping, upgrading, preparing high value-added product.The semicoke hole that pyrolysis obtains is flourishing, and poor stability, very easily spontaneous combustion, cannot complete long distance delivery.Conventional process for purification sprays into process water by cooled semicoke, forces to send into oxygen or air simultaneously, make semicoke carry out hydration and weak oxide reaction, thus it is active to reduce semicoke.This technique strictly need control oxygen content, prevents peroxidation from occurring; Contain a large amount of powdered carbon in semicoke, adding of air (or oxygen) threatens to the security of system simultaneously.
Summary of the invention
The object of the invention is to the novel process that activity, the product stability passivation that is good, that can realize long distance delivery of a kind of effective reduction brown coal drying shaped coal of proposition or semicoke is refining.
Object of the present invention can be achieved through the following technical solutions:
The novel process that a kind of brown coal drying shaped coal or semicoke passivation are refined, this technique is made up of following steps: brown coal drying shaped coal or semicoke are added in revolution steeping cell by (1), liming is sprayed into steeping cell uniformly simultaneously, make brown coal drying shaped coal or semicoke and liming uniform contact complete surface impregnation in steeping cell; (2) enter in treater by the brown coal drying shaped coal after having flooded or semicoke, in treater, pass into low-temperature flue gas by hotblast stove, both carry out abundant contact treating simultaneously; (3) product obtained after having refined is discharged by rotary valve star-like bottom treater.
Described liming is clarification or muddy liming.
Low-temperature flue gas is the mixed gas containing nitrogen, carbonic acid gas, oxygen and water vapor, and temperature is 40-100 DEG C; In flue gas, the volumetric concentration of oxygen is less than 8%.
In treater, dust-containing tail gas is drawn in sack cleaner by exhaust blower and carries out gas solid separation process discharge; From sack cleaner outlet conduit extension tail gas, mix hotblast stove by recirculation blower, and then circulation enters in treater.
The present invention compared to existing technology tool has the following advantages and positively effect:
The surface impregnation of brown coal drying shaped coal of the present invention or semicoke adopts liming as steeping fluid; calcium hydroxide in liming and the carbon dioxide reaction in flue gas generate calcium carbonate; calcium carbonate-filled brown coal drying shaped coal or semicoke micropore; calcium carbonate protective membrane is formed at brown coal drying shaped coal or semicoke surface; arrive and reduce brown coal drying shaped coal or semicoke activity; thus reach the object of refining passivation; the generation of brown coal drying shaped coal or semicoke dust can be reduced; the product obtained is stablized, and can realize long distance delivery.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
1-star-like rotary valve 2-turns round steeping cell 3-treater 4-star-like rotary valve 5-hotblast stove 6-burner blower 7-star-like rotary valve 8-recirculation blower 9-exhaust blower 10-sack cleaner
Fig. 2 is present invention process FB(flow block).
Embodiment
The present invention also will be described further by reference to the accompanying drawings:
With reference to accompanying drawing 1,2, brown coal drying shaped coal or semicoke are added in steeping cell 2 by star-like rotary valve 1, the revolving drum steeping cell of nozzle established by steeping cell 2 in being, liming is evenly sprayed in revolution steeping cell 2 by establishing nozzle in revolution steeping cell 2 simultaneously, make brown coal drying shaped coal or semicoke and liming uniform contact complete surface impregnation in the steeping cell rotated, and entering in treater 3 by feed box discharge, treater 3 is ridge packed tower; In treater 3, impregnated of brown coal drying shaped coal or the semicoke of liming and be 80 DEG C of abundant contact treatings of low-temperature flue gas from the temperature of hotblast stove 5, the brown coal drying shaped coal obtained or semicoke are discharged by rotary valve 4 star-like bottom treater 3; Treater 3 dust-containing tail gas is drawn in sack cleaner 10 by exhaust blower 9 and carries out gas solid separation, draws off bottom the dust deposit separated to sack cleaner through Star-like unloader 7; Flue gas after purification causes safe place discharge through exhaust blower 9; Recirculation blower 8 is drawn a part of tail gas from sack cleaner 10 outlet conduit and is mixed hotblast stove, and circulation enters in treater 3 and reuses.
The present invention is by ensureing brown coal upgrading moulded coal or semicoke surface C aCO to the control of liming consumption
3precipitation capacity, prevents precipitation capacity too much or not enough, controls the flue-gas temperature entering treater 3 simultaneously.
Hotblast stove fuel of the present invention adopts Ratio control quantitatively to burn, and effectively controls the amount of oxygen of the system that enters, and sack cleaner outlet simultaneously arranges Control for Oxygen Content device, to reach explosion-proof object, thus the stability of enhanced system and security.
Claims (6)
1. the novel process that a brown coal drying shaped coal or semicoke passivation are refining, it is characterized in that this technique is made up of following steps: brown coal drying shaped coal or semicoke are added in steeping cell by (1), liming is sprayed into steeping cell uniformly simultaneously, make brown coal drying shaped coal or semicoke and liming uniform contact complete surface impregnation in steeping cell; (2) enter in treater by the brown coal drying shaped coal after having flooded or semicoke, in treater, pass into low-temperature flue gas by hotblast stove, both carry out abundant contact treating simultaneously; (3) product obtained after having refined is discharged by rotary valve star-like bottom treater.
2. the novel process that a kind of brown coal drying shaped coal according to claim 1 or semicoke passivation are refining, the liming described in its feature is clarification or muddy liming.
3. the novel process that a kind of brown coal drying shaped coal according to claim 1 or semicoke passivation are refining, it is characterized in that low-temperature flue gas is the mixed gas containing nitrogen, carbonic acid gas, oxygen and water vapor, temperature is 40-100 DEG C.
4. the novel process that a kind of brown coal drying shaped coal according to claim 3 or semicoke passivation are refining, is characterized in that in flue gas, the volumetric concentration of oxygen is less than 8%.
5. the novel process that a kind of brown coal drying shaped coal according to claim 1 or semicoke passivation are refining, to is characterized in that in treater that dust-containing tail gas is drawn in sack cleaner by exhaust blower and carries out gas solid separation process discharge.
6. the novel process that a kind of brown coal drying shaped coal according to claim 5 or semicoke passivation are refining, is characterized in that, from sack cleaner outlet conduit extension tail gas, mixing hotblast stove by recirculation blower, and then circulation enters in treater.
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| CN104556972A (en) * | 2014-12-24 | 2015-04-29 | 浙江源创电子科技有限公司 | Fossil pottery and preparation method thereof |
| CN107699263A (en) * | 2017-10-19 | 2018-02-16 | 曲靖市盛凯焦化有限责任公司 | A kind of coking process with addition of lignite |
| CN114292631A (en) * | 2021-12-01 | 2022-04-08 | 安徽理工大学 | Preparation method of environment-friendly coal-based self-heating material capable of rapidly heating in high amplitude |
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| SU1049552A1 (en) * | 1982-07-05 | 1983-10-23 | Всесоюзный ордена Ленина научно-исследовательский и проектно-конструкторский институт металлургического машиностроения | Method for continuous steel production |
| CN101025266A (en) * | 2006-02-23 | 2007-08-29 | 中国科学院过程工程研究所 | Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus |
| CN101760222A (en) * | 2009-12-25 | 2010-06-30 | 山东天力干燥设备有限公司 | Novel fluidized bed semicoke production system and process thereof |
| CN101781596A (en) * | 2009-01-19 | 2010-07-21 | 湖南华银能源技术有限公司 | Passivation process and passivation system of active coke |
| CN101974343A (en) * | 2010-10-25 | 2011-02-16 | 周松涛 | Vibrated fluidized bed dry distillation process for upgrading lignite |
| CN102102021A (en) * | 2010-12-02 | 2011-06-22 | 吴植仁 | Lignite upgrading furnace |
| WO2012058851A1 (en) * | 2010-11-01 | 2012-05-10 | 中国科学院过程工程研究所 | Apparatus and method for multi-stage pyrolysis and gasification of solid fuel |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1049552A1 (en) * | 1982-07-05 | 1983-10-23 | Всесоюзный ордена Ленина научно-исследовательский и проектно-конструкторский институт металлургического машиностроения | Method for continuous steel production |
| CN101025266A (en) * | 2006-02-23 | 2007-08-29 | 中国科学院过程工程研究所 | Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus |
| CN101781596A (en) * | 2009-01-19 | 2010-07-21 | 湖南华银能源技术有限公司 | Passivation process and passivation system of active coke |
| CN101760222A (en) * | 2009-12-25 | 2010-06-30 | 山东天力干燥设备有限公司 | Novel fluidized bed semicoke production system and process thereof |
| CN101974343A (en) * | 2010-10-25 | 2011-02-16 | 周松涛 | Vibrated fluidized bed dry distillation process for upgrading lignite |
| WO2012058851A1 (en) * | 2010-11-01 | 2012-05-10 | 中国科学院过程工程研究所 | Apparatus and method for multi-stage pyrolysis and gasification of solid fuel |
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