CN102517061A - Equipment for treating non-sticky coal and coking method for treating non-sticky coal - Google Patents
Equipment for treating non-sticky coal and coking method for treating non-sticky coal Download PDFInfo
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- CN102517061A CN102517061A CN2011103962796A CN201110396279A CN102517061A CN 102517061 A CN102517061 A CN 102517061A CN 2011103962796 A CN2011103962796 A CN 2011103962796A CN 201110396279 A CN201110396279 A CN 201110396279A CN 102517061 A CN102517061 A CN 102517061A
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Abstract
The invention provides a coking method and equipment for treating non-sticky coal, belonging to the technical field of coking chemical industry. The method comprises the following steps of: adding a certain amount of non-sticky coal into a non-sticky coal modification device, and importing water vapor with a certain temperature, wherein the size distribution of the non-sticky coal is less than 3.0 mm; heating up to a preset temperature, and treating the coal sample for 0.5-1 hour at the temperature, wherein the preset temperature is the temperature of 100-150 DEG C in the modification device, and the pressure of the modification device is normal pressure; and then, stopping heating, discharging the modified non-sticky coal from the modification device, filtering, carrying out moisture removal, and storing for standby. The sticky property and the coking property of the non-sticky coal treated by the coking method can be obviously improved, so that the use level of the non-sticky coal in the coking coal blending can be increased to 4-8%, and the quality of coke can meet the requirements.
Description
Technical field
The invention belongs to the coking chemical technology field, be specifically related to a kind of method that the non-sticky coal is used for coking of handling.
Background technology
Rich coal resources in China; But coking relative inadequacy of resources, especially high-quality caking coal are comparatively deficient, along with the rapid expansion of steel production in China scale; The coal resources of China; Especially high-quality caking coal resource day is becoming tight, and Market Situation then more allows of no optimist, and regular market shortage phenomenon occurred.In addition, the development along with coke oven maximization and furnace coal spraying technology improves coke quality, particularly improves the thermal property of coke, satisfies the requirement of blast furnace technology development, also becomes the outstanding problem of coking technology development.The main means that address this problem are and enlarge the coking coal source, improve and improve coke quality.
The important directions, the particularly use of the non-sticking coal of low metamorphic grade high-volatile that enlarge the coking industry development of coal source coking becoming China can enlarge the resource of coking coal to greatest extent, alleviate the deficiency of coking coal.The non-sticking coal reserves of China is abundant, and the Shen Fu mining area is one of several especially big high-quality steam coal base of developing recently of China, and reserves reach 2,300 hundred million tons; And low-sulfur, low grey; (sulphur content is less than 0.5%, and ash content is less than 5%), cheap nearly one times of relative coking coal of its price such as bottle coal.Yet non-sticking coal does not have the knot property because its metamorphic grade is lower, and volatile content is higher, thereby directly uses the amount of allocating into to be restricted, and must carry out the upgrading upgrading for this reason and handle, and improving its amount of allocating into, and satisfies the requirement of big blast furnace STRENGTH ON COKE quality.Coke quality mainly is limited by the coking coal source, through upgrading and the upgrading to coking coal, is the major measure that fundamentally improves coke quality, can reduce the coke making and coal blending cost simultaneously, obviously improves the economic benefit that coking is produced.
The Chinese patent document patent No.: 200410069197 disclose a kind of method with low volatile weak cohesive or non-adhesive coal coking, at first in feed coal, add emulsified bitumen, and emulsified bitumen and feed coal are fully stirred, and mix; The bituminous feed coal mixture that contains that mixes is sent into extrusion equipment and pushed, emulsified bitumen is fully combined with feed coal; The feed coal mixture that contains emulsified bitumen that will pass through after the extruding is stacked, and makes emulsified bitumen soak into feed coal; The feed coal mixture of preparation is added in the pit kiln,, carry out the destructive distillation coking in the heating of secluding air condition.The method of coal coking of the present invention is applicable to present coal tar enterprise production coke, and can produce the low high-intensity high-quality metallurgical coke of ash by lower cost, has reduced the cost of producing high grade coke, has enlarged the kind of coal tar with coal.
The Chinese patent document patent No.: 201010102638 disclose a kind of shenfu coal hydro-thermal treatment method; Be with a certain amount of shenfu coal, its size-grade distribution is pressed the mass ratio 1～2: 1 of water and coal below 1.25mm; Add entry and be placed in the reaction kettle, feed nitrogen to drain the air in the reaction kettle; Reaction kettle begins heating and stirs, and is warming up to preset temperature, and said preset temperature is meant the hydrothermal treatment consists temperature at 150～300 ℃, and reacting kettle inner pressure was handled coal sample 1～3 hour at 0.4～9.0Mpa under said temperature; Stop heating then and be quickly cooled to room temperature, venting reaction kettle pressure is opened reaction kettle to normal pressure; Coal sample from reaction kettle after the taking-up hydrothermal treatment consists, and after removing by filter moisture, store for future use.The shenfu coal of handling through the present invention can obviously improve the agglutinating value(of coal) and the coking property of coal, thereby can improve its consumption in coke making and coal blending and reach 8～15%, and coke quality can meet the demands.
These technological weak point right and wrong are successional, and coal needs the reaction of certain hour in treating processes.
Summary of the invention
The objective of the invention is,, a kind of method of handling the non-sticky coal, being used for coking is provided to the deficiency of prior art.
Explanation of nouns:
The non-sticky coal: in the Chinese Coal Classification national standard, centering, low degree of coalification and the appellation of non-cohesive bituminous coal.This standard code, knot index G＜5 are picked up in dry ash-free basis volatile matter＞20～37% of non-sticking coal.Softening when non-sticking coal heats, be non-coking coal.It is generally as steam coal or domestic fuel.Typical case's coal has Shenmu County's coal in Shaanxi.
Technical scheme of the present invention is:
A kind of equipment that is used for the non-sticky coal modification comprises: preheating can 11, retort 14, coal charging apparatus, coal discharger; It is characterized in that preheating can 11 is placed with retort 14 side by side, is connected in series by water vapour pipeline 1; The coal charging apparatus comprises that opening for feed A (10) that is placed in preheating can 11 tops and opening for feed B (15), the coal discharger that is placed in retort 14 tops comprise discharging port A (10) that is placed in preheating can 11 lower ends and the discharge port B (13) that is placed in retort 14 lower ends, guarantees packing into and discharging of coal.
Preferably, described retort 11 and preheating can 14, retort 11 has the steam distribution pipe with preheating can 14 inside, and retort 11 is twined by steam-pipe 1 with preheating can 14 outsides, and retort and preheating can are carried out indirect heating; Preferred, the steam distribution pipe of retort 11 and preheating can 14 inside distribution pipe from top to bottom reduces gradually, and a jar internal heating thing is heated evenly.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises register 6, and register 6 is contained in before preheating can 11 and the retort 14, the regulation and control steam temperature.
Preferably; The said equipment that is used for the non-sticky coal modification; Also comprise stress measuring device, stress measuring device comprises the tensimeter A (8) that is installed on the water vapour pipeline 1, be installed on tensimeter B (14) and the tensimeter C (21) on the preheating can 11 on the retort 14, detects vapor pressure.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises temperature measuring equipment, and temperature measuring equipment is contained on preheating can 11 and the retort 14.Preferably, respectively there are 9 temperature measuring equipment upper, middle and lower triad to place on preheating can 11 and the retort 14, accurately measure the temperature conditions in preheating can and the retort.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises the steam cooling device; The steam cooling device is installed in preheating can, retort back, the tail gas of treating water steam.Be mainly used in unnecessary steam and reduce the pressure in the pipeline, increase the pressure difference at equipment two ends, increase the flowability of steam in entire equipment.Preferably, the steam cooling device is steam cooler (23).
Preferably; The said equipment that is used for the non-sticky coal modification; Also comprise venting port, after venting port A (16), venting port B (19), venting port C (27) are installed on retort 14, preheating can 11 and steam cooling device respectively, when work is abnormal, can bleed off the steam in the jar timely;
Preferably, the said equipment that is used for the non-sticky coal modification also comprises sample devices and gas analyzer 26, and being mainly used in has unharmful substance to discharge in the gas that detects external emptying, guarantees that whole facility does not produce pollution to environment in the course of the work.
The effect of each several part is following:
1, flowrate control valve can effectively be controlled steam flow;
2, register comprises water-chilling plant and electric heater unit, and water-chilling plant is with the temperature of pyritous steam cooling to needs, and electric heater unit is the temperature that the steam heating of lesser temps is arrived needs;
3, be furnished with steam in the retort preheating can and disperse comb; Guarantee the heating uniformity of heating object, there is the steam heating tube of winding the outside, and pipeline can switch each other; Retort and preheating can be double replacement mutually; In when reaction, another utilizes the waste heat of retort to carry out preheating, and being preheating to after the certain temperature directly, dress turns to retort;
4, temperature gauge on the distribution apparatus on retort and the preheating can be observed the temperature variation in retort and the preheating can at any time;
5, the steam condensate tapping equipment is arranged at retort and preheating can bottom, regulates the water level of steam condensate in two jars at any time;
6, vapour condensation device is the device of recovered steam, prevents that last discharge of steam from exerting an influence to environment in air.
A kind ofly handle the method that the non-sticky coal is used for coking, comprise the following steps:
1) with the non-sticky coal, be crushed to its size-grade distribution below 3.0mm, add in the non-sticky coal modification device, feed water vapour;
2) be warming up to 100～250 ℃, the pressure in the transformation of the way device is normal pressure, under said temperature, handles coal sample 0.5～1 hour;
3) stop heating, the non-sticky coal after the transformation of the way is emitted in the transformation of the way the device, and after removing by filter moisture, store for future use.
The present invention compares with similar patent CN1806928, CN101760267A, CN102140356A, CN102191071A; Treatment process difference of the present invention is that the non-sticky raw coal need not need carry out coal technologies such as slurrying as other patent through pulverizing the direct processing in back; The processing means that adopted are water vapour, and unlike the hydrothermal method that adopts in other patent, the present invention carries out in normal pressure in treating processes; Treatment time is shorter; Reduced requirement, needed comparatively high temps and higher pressure as hydrothermal method to equipment, the present invention with other similarly invention to compare cost lower.
The non-sticky coal of handling through the present invention can obviously improve the cohesiveness and the coking property of coal, thereby can improve its consumption in coke making and coal blending and reach 4～8%, and coke quality can meet the demands.
The invention has the beneficial effects as follows: utilize water vapour that the non-sticky coal is carried out the upgrading upgrading; The cohesiveness and the coking property of coal have been improved effectively; Can improve the consumption 4～8% of non-sticky coal in coke making and coal blending; Greatly reduce the coke making and coal blending cost, the coke of producing reaches big blast furnace (1000m fully
3More than) requirement of STRENGTH ON COKE; With this invention the non-sticky coal is carried out the upgrading upgrading, the technology of employing is simple, and processing cost is low, and environmentally safe has reduced the coke making and coal blending cost, has widened the source of coking coal, has favorable economic benefit.
Description of drawings
Fig. 1 is the structural representation of equipment of the present invention;
1, medium temperature and medium pressure steam, 2, steam valve, 3, reducing valve/relief valve, 4, steam-flow meter; 5, entrance of cooling water A, 24, entrance of cooling water B, 6, register, 7, cooling water outlet A; 22, cooling water outlet B, 8, tensimeter A, 17, tensimeter B, 21, tensimeter C; 9, TM A, 18, TM B, 20, TM C, 25, TM D; 10, discharging port A, 13, discharge port B, 11, retort, 14, preheating can, 12, opening for feed A, 15, opening for feed B, 16, venting port A, 19, venting port B, 27, venting port C, 23, steam cooler, 26, sample devices/gas analyzer
Fig. 2 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment the present invention is further specified, but be not limited thereto.Used non-sticky coal is Shenmu County, the geographic shenfu coal in Fugu among the embodiment, and water vapour is the reduced steam after the steam-electric power that produces of high-duty boiler.
Embodiment 1:
A kind of equipment that is used for the non-sticky coal modification comprises: 1, medium temperature and medium pressure steam, 2, steam valve, 3, reducing valve/relief valve, 4, steam-flow meter; 5, entrance of cooling water A, 24, entrance of cooling water B, 6, register, 7, cooling water outlet A; 22, cooling water outlet B, 8, tensimeter A, 17, tensimeter B, 25, tensimeter C; 9, TM A, 18, B, 20, TM C, 21, TM D; 10, discharging port A, 13, discharge port B, 11, retort, 14, preheating can, 12, opening for feed A, 15, opening for feed B, 16, venting port A, 19, venting port B, 27, venting port C, 23, steam cooler, 26, sample devices/gas analyzer
Described retort 11 and preheating can 14 are parallel arranged, by 1 series connection of water vapour pipeline, help steam from the retort to the preheating can; The coal charging apparatus comprises that opening for feed A (10) that is placed in preheating can 11 tops and opening for feed B (15), the coal discharger that is placed in retort 14 tops comprise discharging port A (10) that is placed in preheating can 11 lower ends and the discharge port B (13) that is placed in retort 14 lower ends, guarantees packing into and discharging of coal.
Described retort 11 and preheating can 14 have the steam distribution pipe in jar, and distribution pipe is heated evenly a jar internal heating thing from more to less from top to bottom, are twined and can be carried out indirect heating to retort and preheating can by steam-pipe outside jar; Retort 11 is twined by steam-pipe 1 with preheating can 14 outsides.
Register 6 is one of critical equipment of equipment, and register 6 can be lowered the temperature to steam by water before being contained in preheating can 11 and retort 14, can steam be heated electricity consumption, and steam regulation temperature effectively, temperature control precision is ± 2 ℃;
Described tensimeter 8,17,25; Comprise the tensimeter A (8) that is installed on the water vapour pipeline 1, be installed on tensimeter B (14) and the tensimeter C (21) on the preheating can 11 on the retort 14; Be mainly used in the pressure change that detects steam, the flowability of the inside and outside steam of retort;
Described TM 9,18,20,21 is contained on preheating can 11 and the retort 14, is mainly used in to detect a jar inside and outside temperature variations, and temperature is most important for the non-sticky coal modification;
Described opening for feed 12,15,, discharge port 10,13,, be that the whole plant of fastening that makes forms an airtight passage when equipment work;
Described 16,19,27, venting port, after venting port A (16), venting port B (19), venting port C (27) are installed on retort 14, preheating can 11 and steam cooling device respectively, the steam in when work is abnormal, can bleeding off timely jar;
Described 23, steam cooler, steam cooler are installed in preheating can, retort back, the tail gas of treating water steam.Be mainly used in unnecessary steam and reduce the pressure in the pipeline, increase the pressure difference at equipment two ends, increase the flowability of steam in entire equipment.
Described sample devices/gas analyzer 26, being mainly used in has unharmful substance to discharge in the gas that detects external emptying, guarantee that whole facility does not produce pollution to environment in the course of the work.
Working process:
With a certain amount of, the non-sticky coal of certain particle size adds in retort 11 and the preheating can 14, and the steam of medium temperature and medium pressure arrives registers 6 through valve 2; Come the steam regulation temperature to the temperature that requires with the lower water of temperature, perhaps through electrically heated mode steam heating is arrived the temperature that is fit to, the steam that temperature is fit to gets into retort 11 and reacts upgrading with the non-sticky coal; After arriving the temperature that requires in jar, keep the temperature certain hour, the assurance reaction is accomplished; Make the non-sticky coal modification meet the requirements of effect, reacted steam gets into 14 pairs of new non-sticky coals of preheating can and carries out preheating, and last steam gets into vapour condensation device 23; Carry out the condensing and recycling of steam, with the gas of the external emptying of sample devices/gas analyzer 26 analyzing and testing, in whole upgrading process; Detect the temperature of jar inside and outside and steam with TM 9,18,20,21, detect steam and jar interior pressure with tensimeter 8,17,25, after handling; Stop steam; In jar, emit the non-sticky coal of handling well,, be used for coke making and coal blending through filtering the moisture in the coal.
Embodiment 2
Like the embodiment 1 described equipment that is used for the non-sticky coal modification, difference is, described 11,14 retort/preheating can exchanges and uses.
Respectively there are 9 temperature measuring equipment upper, middle and lower triad to place on preheating can 11 and the retort 14, accurately measure the temperature conditions in preheating can and the retort
Embodiment 3:
Get the 100kg shenfu coal, granularity is below the 3mm, joins in the non-sticky coal modification device, feeds water vapour, is heated to 100 ℃, and after 0.5 hour, stops heating and stopped reaction 100 ℃ of insulation reaction, from modifying apparatus, emits the coal of processing.
Embodiment 4:
Get the 100kg shenfu coal, granularity is below the 3mm, joins in the non-sticky coal modification device, feeds water vapour, is heated to 200 ℃, and after 0.5 hour, stops heating and stopped reaction 200 ℃ of insulation reaction, from modifying apparatus, emits the coal of processing.
Embodiment 5:
Get the 100kg shenfu coal, granularity is below the 3mm, joins in the non-sticky coal modification device, feeds water vapour, is heated to 220 ℃, and after 1.0 hours, stops heating and stopped reaction 220 ℃ of insulation reaction, from modifying apparatus, emits the coal of processing.
Embodiment 6:
Get the 100kg shenfu coal, granularity is below the 3mm, joins in the non-sticky coal modification device, feeds water vapour, is heated to 250 ℃, and after 0.5 hour, stops heating and stopped reaction 250 ℃ of insulation reaction, from modifying apparatus, emits the coal of processing.
Embodiment 7:
Get the 100kg shenfu coal, granularity is below the 3mm, joins in the non-sticky coal modification device, feeds water vapour, is heated to 250 ℃, and after 1.0 hours, stops heating and stopped reaction 250 ℃ of insulation reaction, from modifying apparatus, emits the coal of processing.
The coal that the contriver crosses steam treatment carries out the coal-blending coking experiment, with regular supply 3000m on the 40kg small coke oven
3The coke making and coal blending of big blast furnace compare, allocate 6% process differing temps into, the non-sticky coal that the different treatment time handled carries out the coking experiment, analyzes its thermal property, contrast is like following table 1:
Table 1: handle non-sticky coal coking experiment later
Can find out by table 1; Being used for coke making and coal blending with water vapour through the non-sticky coal of handling more than 200 ℃ and 0.5 hour reaches by the performance requriements of caking coal as benchmark experiment coke fully; Because non-sticky coal price lattice are lower; The caking coal price is higher, and the non-sticky coal of handling through this technology can reduce coal blending cost greatly.
Claims (1)
1. an equipment that is used for the non-sticky coal modification comprises: preheating can 11, retort 14, coal charging apparatus, coal discharger; It is characterized in that preheating can 11 is placed with retort 14 side by side, is connected in series by water vapour pipeline 1; The coal charging apparatus comprises that opening for feed A (10) that is placed in preheating can 11 tops and opening for feed B (15), the coal discharger that is placed in retort 14 tops comprise discharging port A (10) that is placed in preheating can 11 lower ends and the discharge port B (13) that is placed in retort 14 lower ends, guarantees packing into and discharging of coal.
Preferably, described retort 11 and preheating can 14, retort 11 has the steam distribution pipe with preheating can 14 inside, and retort 11 is twined by steam-pipe 1 with preheating can 14 outsides, and retort and preheating can are carried out indirect heating; Preferred, the steam distribution pipe of retort 11 and preheating can 14 inside distribution pipe from top to bottom reduces gradually, and a jar internal heating thing is heated evenly.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises register 6, and register 6 is contained in before preheating can 11 and the retort 14, the regulation and control steam temperature.
Preferably; The said equipment that is used for the non-sticky coal modification; Also comprise stress measuring device, stress measuring device comprises the tensimeter A (8) that is installed on the water vapour pipeline 1, be installed on tensimeter B (14) and the tensimeter C (21) on the preheating can 11 on the retort 14, detects vapor pressure.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises temperature measuring equipment, and temperature measuring equipment is contained on preheating can 11 and the retort 14.Preferably, respectively there are 9 temperature measuring equipment upper, middle and lower triad to place on preheating can 11 and the retort 14, accurately measure the temperature conditions in preheating can and the retort.
Preferably, the said equipment that is used for the non-sticky coal modification also comprises the steam cooling device; The steam cooling device is installed in preheating can, retort back, the tail gas of treating water steam.Be mainly used in unnecessary steam and reduce the pressure in the pipeline, increase the pressure difference at equipment two ends, increase the flowability of steam in entire equipment.Preferably, the steam cooling device is steam cooler (23).
Preferably; The said equipment that is used for the non-sticky coal modification; Also comprise venting port, after venting port A (16), venting port B (19), venting port C (27) are installed on retort 14, preheating can 11 and steam cooling device respectively, when work is abnormal, can bleed off the steam in the jar timely;
Preferably, the said equipment that is used for the non-sticky coal modification also comprises sample devices and gas analyzer 26, and being mainly used in has unharmful substance to discharge in the gas that detects external emptying, guarantees that whole facility does not produce pollution to environment in the course of the work.
A kind ofly handle the method that the non-sticky coal is used for coking, comprise the following steps:
1) with the non-sticky coal, be crushed to its size-grade distribution below 3.0mm, add in the non-sticky coal modification device, feed water vapour;
2) be warming up to 100～250 ℃, the pressure in the transformation of the way device is normal pressure, under said temperature, handles coal sample 0.5～1 hour;
3) stop heating, the non-sticky coal after the transformation of the way is emitted in the transformation of the way the device, and after removing by filter moisture, store for future use.
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| CN2011103962796A CN102517061A (en) | 2011-12-03 | 2011-12-03 | Equipment for treating non-sticky coal and coking method for treating non-sticky coal |
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| CN2011103962796A CN102517061A (en) | 2011-12-03 | 2011-12-03 | Equipment for treating non-sticky coal and coking method for treating non-sticky coal |
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| CN102961907A (en) * | 2012-11-23 | 2013-03-13 | 陈广海 | Special pressure filter tank for filter press |
| CN110982542A (en) * | 2019-11-12 | 2020-04-10 | 北京科技大学 | Method for preparing blast furnace blowing semicoke from low-rank coal based on hydrothermal reaction |
| CN114317018A (en) * | 2021-11-23 | 2022-04-12 | 淮北矿业股份有限公司 | Method for improving coking property of low-coalification-degree coal |
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| WO2010090230A1 (en) * | 2009-02-03 | 2010-08-12 | 新日本石油株式会社 | Upgrading method for low-grade coal, and process for production of coke |
| CN101760267A (en) * | 2009-03-17 | 2010-06-30 | 顾大地 | Method for modifying lignite |
| JP2011026424A (en) * | 2009-07-24 | 2011-02-10 | Jfe Steel Corp | Coal modifying method |
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| CN102961907A (en) * | 2012-11-23 | 2013-03-13 | 陈广海 | Special pressure filter tank for filter press |
| CN110982542A (en) * | 2019-11-12 | 2020-04-10 | 北京科技大学 | Method for preparing blast furnace blowing semicoke from low-rank coal based on hydrothermal reaction |
| CN110982542B (en) * | 2019-11-12 | 2021-03-12 | 北京科技大学 | Method for preparing blast furnace blowing semicoke from low-rank coal based on hydrothermal reaction |
| CN114317018A (en) * | 2021-11-23 | 2022-04-12 | 淮北矿业股份有限公司 | Method for improving coking property of low-coalification-degree coal |
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Application publication date: 20120627 |